• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    (57) Summary The invention relates to a wood dryer in which a drying chamber (9) is arranged, at least one stack (6) of wood to be dried, and which drying chamber can be closed so that supply air enters the said chamber (8; 81 ) by at least one supply air duct (1; 1 ') and said that from the adjacent chamber the air (8; 82) is extracted through at least one exhaust air duct (1; 1 "), the at least one exhaust air duct (1; 1 ") and the at least even supply air duct (1; 1 ') are arranged to alternate space among themselves after a certain time interval (t) during the drying of the wood to a certain time interval (t), the drying chamber (9) also having a flake (2). ) for circulating air around the timber stacking stacks their width direction, and a heating device (3) for heating the circulating air to a drying temperature. In each supply air duct (1; 1 ') and Iran air duct (1; 1 ") of the drying chamber a heat exchanger (10) is arranged, which heat exchanger (10) includes rod groups (10; 10', 10") in the supply air and from - the air ducts (1), whereby a rod (7) in a rod group is closed in both Ondarna and in it there is a hollow space where an unloading material (70) whose phase change temperature (vatskaya solid) is within a temperature range (Tag, Thog) as the temperature (TW) of the supply air (8; 81) to the supply air duct (1; 1 ') and the temperature (Man) of the exhaust air (8; 82) from the supply air duct (1, 1 ").
    公开号:SE1550341A1
    申请号:SE1550341
    申请日:2015-03-23
    公开日:2015-09-22
    发明作者:Jan-Henrik Sievers
    申请人:Incito Oy；
    IPC主号:
    专利说明:

    The invention relates to a wood dryer according to the preamble of claim 1, wherein an exhaust air duct and a fill air duct are arranged to alternate between them after a certain time interval (t).
    The invention also relates to a method for drying wood according to the preamble of claim 10.
    The invention relates to a control unit according to claim 12 for determining a time interval t and a computer program according to claim 15 which is arranged to carry out the method according to the invention.
    Wood dryers where the drying air changes the direction of circulation after a certain time interval and where the drying air circulates across the pile of wood are usually called chamber dryers. The chamber dryers are invariably batch dryers: a timber stacker is stacked in a dryer with a truck or for a while on rails, a drying program is started and the timber pile timber stacks are removed from the chamber dryer after the wood has reached a mill moisture. Air can enter the drying chamber during the drying program through one or two of the two supply air ducts, and from the chamber there can also be defrosted air, as here the same temperature as the drying air, through one or two exhaust air ducts. The fresh air duct and the supply air duct alternate between each other during drying as the direction of circulation of the drying air changes according to the drying program to allow the air to circulate around the timber stack piles their width direction either clockwise or counterclockwise.
    In a chamber dryer, the supply air to the drying chamber must be heated to raise its temperature and, at the same time to reduce its relative humidity, ensure that it becomes usable for drying the wood. After the air has become moist and warm during the drying of the wood, it is deposited through the fresh air duct.
    The heating of the supply air takes a considerable amount of energy, especially in the winter, and on the other hand, the exhaust air from the dryer chamber contains a considerable amount of heat which is easily released through the exhaust air duct.
    According to the state of the art, an attempt has been made to preheat the air entering through the supply air duct with the energy of the air deposited through the exhaust air duct by placing different types of heat exchangers between the supply air duct and the exhaust air duct. These heat exchangers have the basic problem that they are not efficient: both the exhaust air duct and the supply air duct lead to the outdoor air and are usually at a relatively large physical distance from each other, which makes it difficult to make the heat exchangers efficient.
    The starting point for the invention was to solve the above-mentioned problems by providing a heat exchanger between the supply air duct and the exhaust air duct which enables efficient heating of the supply air to the drying chamber and cooling of the exhaust air duct flowing from the chamber before it leaves the exhaust duct.
    The first aspect of the invention relates to a wood dryer according to claim 1.
    In particular, the invention relates to a wood dryer having a drying chamber where at least one stack of wood is to be dried, and which drying chamber is closed so that supply air enters the said chamber through at least one supply air duct and so that from said chamber is removed from the exhaust air through at least one exhaust air duct. The at least one exhaust air duct and the at least one supply air duct are arranged to alternate space between them at a desired time interval during the drying of the wood, and a heat exchanger is arranged as usual from the exhaust air duct and supply air duct of the drying chamber. In addition, there is a flat in the drying chamber for circulating a lift around the timber stacked stacks in the same width, direction of rotation, and a lip protection device for heating the circulation liquor to a drying temperature. The heat exchanger in the respective supply air duct and exhaust air duct includes a rod group which is separate from the other rod groups, and at least one, preferably habit, rod and rod group are closed to both spirits, and each closed rod has an inhaled space where liquid or liquid material is arranged. form so that the phase change temperature of said loose material (vatskagast substance) is within a temperature range which is between the temperature of the supply air to the supply air duct and the exhaust air from the exhaust air duct.n.
    The invention preferably relates to a wood dryer with one or two two air ducts and one or two exhaust ducts.
    The invention also relates to a method for drying wood according to claim 10, a wood dryer according to claim 1. More specifically, the method comprises at least the following struts: supply air, as here a certain temperature, is fed to the drying core through at least one supply air duct so that the supply air flows through the rod group the supply air duct and at the same time preheats to another, higher temperature of heat frail the rods in the rod group in the heat exchanger and from the unloading material in said rods, whereby at least a part of the heat energy received by the supply air originates final] that the unloading rod solid form, it is led out of the air from the drying chamber to at least one exhaust air duct said; that it flows through the rod group the heat exchanger in the exhaust duct and at the same time cools down to a lower temperature by emitting heat to the rods the rod group and the unloading material therein, whereby at least a part of the heat energy emitted by the exhaust air from the exhaust duct phase to liquid form.
    Preferably, a change of location is performed between a supply air duct and an exhaust air duct after a certain time interval (t), which time interval (t) is determined based on the release material the rod group from the air duct has been discovered to be liquid or in solid form. All a supply air duct and an exhaust air duct change places between them means that a duct that was previously a supply air duct to the tank chamber differs from a supply air duct to an exhaust air duct and that a duct that was previously a drying air outlet duct differs from a supply air duct to a supply air duct.
    The change of location between the supply air duct and the exhaust air duct is carried out, for example, by watering the direction of the river for the drying air in the drying chamber so that it is modified in relation to the previous river direction of the drying air.
    According to a preferred embodiment of the invention, the preparation comprises at least the following steps: it monitors the temperature of the osmaterial in a rod group in at least one supply air duct and at least one exhaust air duct with a monitoring unit to detect a phase change of the discharge material to the air duct. a time interval for changing the space between the indoor air duct and the supply air duct is determined with a processor based on the temperature of the discharge material the supply air duct and the exhaust air duct, and a control command is created for an air flow regulator, such as a flue, to water the drying air surface. the control command to the air flow regulator, such as the float, with a data transfer unit, to irrigate the air flow in the opposite direction, i.e. 180 degrees in relation to the previous direction of the drying air flow, whereby the drying air flow runs around the stack in the width direction of the dose.
    The invention also relates to a control unit according to claim 15 for requesting a direction change time interval in a wood dryer according to any one of claims 1-6.
    More particularly, the invention relates to a control unit comprising at least one memory with a computer program code, which at least one circuit and which computer program code are arranged to together with at least one processor cause the control unit to do at least the following things: to detect with a monitoring unit a phase change of the laser material. the bar group .the heat exchanger at least one supply air duct and at least one exhaust air duct, to determine with a processor on the basis of the detected phase change of the discharge material a time interval (t) during which the exhaust air duct / exhaust ducts and the supply air ducts to the air ducts to a drying air flow regulator, such as a float, send a control command to change the direction of the drying air flow.
    The invention also relates to a computer program code according to claim 16 which is arranged to carry out the method d6 the computer program code is executed with a processor in a control unit according to the invention.
    The wood dryer and the drying process must be used, in which case it is based primarily on the use of rod groups mounted as a heat exchanger in an exhaust air duct and a supply air duct, which habitual rods have loose material whose phase change temperature (water-scalable substance) is through a temperature range. on the exhaust from the exhaust duct.
    In a preferred embodiment of the invention, all the rods in each rod group are separate so that the rods rod groups in the different channels do not have physical contact with each other, and that the loose material rods rod groups in the different channels are not in fluid or material communication with each other.
    In another preferred embodiment of the invention, the rods of the rod groups in the various channels are vertical, and said rod groups communicate with each other only by lowering the drying air.
    This heat exchanger deviates hot from the known heat exchangers to its construction, already due to the fact that the heat exchanger's parts supply air duct and exhaust air duct, ie, the members of the rod groups, should not be in physical communication with each other in any other way by conveying the drying air.
    In a normal chamber dryer, a change of location is based between a supply air duct and an exhaust air duct, ie. change of the blowing direction of the drying air, of feeds of the relative humidity and temperature of the drying air in the drying chamber and of a change of direction interval as a control logic for the drying chamber on the basis of these feeds determines the flow direction of the drying air.
    In the invention, changing the direction of the drying air in the stable is based on discovering a phase change of phase change material (hereinafter discharge material) which are closed rods in a heat exchanger in the supply air duct and the exhaust air duct and on determining a direction change interval for the drying air flow direction.
    Preferably, a change of location is always performed between an exhaust air duct and supply air duct after a certain time interval (t), which time interval (t) is determined based on whether the unloading material the rod group in the exhaust air duct here is discovered to be in liquid or solid form. In the above-described preferred embodiment of the method according to the invention, a phase change of the unloading material in the rods rod group is thus recorded by simple temperature measurements.
    The invention and these advantages are further illustrated by the following with reference to the accompanying drawing, in which Figure 1 is a schematic sectional view of a drying chamber according to the invention in which the drying air flow opens clockwise around timber stacks; figure 2 shows the drying chamber according to figure 1 where the direction of the drying air flow here is turned 180 degrees; Figure 3A is a schematic view of determining a direction change time interval for the drying air flow by saturating the temperature of the osmic material; Figure 3B is a schematic view of how the measurements of the temperature of the unloading rods shown in Figure 3A are carried out with a control unit for the drying chamber; Figure 3C is a river view of measures for determining the direction change interval of the drying air flow; Figure 4 illustrates the structure of a rod rod group, and Figure 5 Cr shows a schematic view of the structure of the control unit.
    In the following, it is briefly stated which aspect of the invention is illustrated by each figure and the main constructions and functions shown in the figure.
    Figures 1 and 2 illustrate a wood dryer according to the invention as here a drying chamber 9 where Cr is arranged at least one stack 6 of wood to be dried.
    On the floor of the drying chamber 9, according to the embodiment of the invention shown in Figures 1 and 2, a bundle of timber 60 with 44 timber stacks 6 is placed; 6 '; 6 ", 6-, 6-, seen directly towards the spirit of the respective pile of timber. Said drying chamber 9 can enter supply air 8; 81 through a supply air duct 1; 1 ', and from the drying chamber 9 only exhaust air 8; 82 is removed through a air duct 1; 1 ". Supply air duct 1; 1 'and the exhaust duct 1; 1 "is at a certain physical distance, which is, for example, 5 - 10 meters, from each other.
    In the drying chamber 9 there is a flap 2 for circulating the drying air around the timber stacks in their width direction, and a heating device 3 for heating the circulating air to a drying temperature. In torkkamrnare.ns supply air duct 1; 1 'and exhaust duct 1; 1 is arranged a heat exchanger 10 with a rod group 10; 10 '; 10 "in each channel.
    To the supply air duct 1; 1 'a supply air flood 8 enters; 81 at a temperature To and from the exhaust duct 1; 1 ", an exhaust air flow 8; 82 is deposited at a temperature T2from.
    The volume flow for both it through the supply air duct 1; 1 'to the drying chamber incoming air flow 8; 81 and the volume flow for it through the exhaust duct 1; 1 "The air head removed from the drying chamber is regulated with control slats 5; 5 '; the lower part of the ducts 1; 1', 1".
    Figures 3A - 30 illustrate the discovery, even the phase change of the unloading material 70 the rods 7 by temperature feeds clarpa, and the determination of a time interval t to be used to change the direction of the second drying air flow 7 on the basis of these temperature feeds.
    Figures 3A and 30 show determination of a time interval t for changing the direction of the drying air flow 8 on the drying chamber on the basis of fed temperatures T1 and T2 on the unloading material 70 in the rods in the supply air duct 1; 1 'and the exhaust air duct 1, respectively; 1 ".
    The direction of the drying air flow 8 is changed by means of a radial plane 2.
    Figure 3B illustrates control means and a control unit, shown in more detail, which is used for the drying chamber 9 in the direction of the second drying air flow 7. The monitoring unit 44 in the control unit 4 has temperature sensors which measure the temperature T1, T2 on the unloading material 70 in the rods 7 in the supply air duct 1; 1 'and the exhaust duct 1; 1 "and the temperature itself the supply air and exhaust air ducts 1; 1".
    The drying air flow 8; 83, 84 are regulated mainly on the basis of a supply of the temperature of the unloading material 70 the rods by which tram * if the unloading material 8 the rods are in liquid form or in solid form. The temperature limits at these detections are the supply air flow Tltill and the exhaust air flow T2fran.
    The temperature sensors that supply the temperature to the supply air duct 1; 1 'are mounted in the supply air river 8; 81 down and up direction relative to the rod group 10, respectively; 10 'supply air duct 1; 1 '. These temperature sensors detect the supply air flow temperatures Tlhos J and T2lag before and after the rod group 10.
    The temperature sensors that supply the temperature from the ventilation duct 1; 1 "is correspondingly mounted of the downstream and upstream direction 8 of the exhaust air flow 8; 82 relative to the rod group 10; 10" in the exhaust air duct 1; 1 ". These temperature sensors detect the airflow temperature T2hag and T216.g yes before and after the rod group 10, 10".
    The purpose of the temperature supplies to the supply air duct 1; 1 'and the exhaust duct 1; 1 "is first of all make sure that the temperatures of the supply air river 8; 81 and the exhaust air river 8; 82 Tltill, T2fran are within permissible limits.
    Figure 4 in turn illustrates the construction of a rod 7 in a rod group 10. Each rod 7 in the rod group 10 is closed! The dead spirits, and in it there is a hollow space where loose material 70 is arranged whose phase change temperature (liquid / solid) is within a certain temperature range which is between the temperature Tllill on the supply air 8; 81 to the supply air duct 1; 1 'and the temperature T2 from the outside air 8; 82 from the exhaust duct 1; 1 ".
    Figure 5 is a schematic view of a control unit 4 used to control the drying in a drying chamber 9 according to the invention.
    The control unit 4 has at least one memory 41 with at least one computer program code 43 (Figure 45 shows two computer program codes 43). The control unit further has a processor 42 with which, on the basis of the unloading material 70 second phase, a time interval t is determined within which the exhaust duct 1; 1 "and supply air duct.n 1; 1 'must change places between themselves.
    The control unit 4 further has a f.C.) first monitoring unit 44; 44a which feeds the temperature T1 on the unloading material 70 a rod 7 in the rod group 10; 10 'in the supply air duct 1; 1 ', and a second Monitoring Unit 44; 44b which feeds the temperature T1 on the unloading material 70 a rod 7 rod group 10; 10 "in 9 lull channel 1; 1". These temperature feeds make it possible to easily detect a phase change of the pilot material the rods 7 in both rod groups 10; 10 'and 10; 10 'the heat exchanger 10 in the supply air and exhaust air duct 1, respectively; 1, 1 ".
    In one embodiment of the invention, the Monitoring Units 44; 44a and 44; 44b, the temperature of the closed rods, by feeding the internal pressure the release material 70 the rods which depends on the shape of the release material (liquid / solid), the monitoring units 4 are also arranged to monitor the flake other quantity connection to phase change of the release material.
    The control unit further has a data transfer unit 45 which makes it possible for a drying air regulator, such as a Walt 2, to send a control command for the direction of the second drying air flow 8. The invention is illustrated in more detail in the following reference to the above general description. - 5.
    Figures 1-5 illustrate a wood dryer according to the invention, in which a drying chamber 9 is arranged at least one stack 6 of wood to be dried, and which drying chamber can be closed so that only the supply air 8 enters the said chamber; 81 through a supply air duct 1; 1 'and said that from the chamber only exhaust air 8 is removed; 82 through an exhaust air duct 1; 1 ", the exhaust duct 1; 1" and the supply air duct 1; During the drying of the wood to a desired humidity, 1 'am arranged to change places among themselves after a time interval t, the drying chamber 9 also having a surface for circulating tuft around the wood pile piles their width direction, and a heating device 3 V: 5r for heating the circulation air to a circulation air. . In the supply air duct 1 of the drying chamber and the exhaust air duct 1; 1 "am arranged a heat exchanger 10 with a rod group 10; 10 ', 10" in each channel, the usual rod 7 in the rod groups being closed to both the spirits and here a tight space is arranged where the material 70 yam phasandrin_4temperature (water-resistant substance) is within ell, temperature intervalTg, Thog which is mean temperature Ttill pa supply air 8; 81 to the supply air duct 1; 1 'and the temperature Tfran on the exhaust air 8; 82 from the air duct 1; 1 ".
    An ordinary chamber dryer does not allow efficient recovery of the heat energy from the air flow, which also limits the ability to preheat the supply air to the supply air duct with the heat energy from the air flow.
    In an ordinary chamber dryer, the change of location between a supply air duct and an exhaust air duct is based, ie. the change in the blowing direction of the drying air, on feeds of the relative humidity and temperature of the drying air the drying chamber and on a direction change interval which a control logic for the drying chamber on the basis of these feeds determines for the flow direction of the drying air.
    In the invention, it is instead possible to recover the heat energy in the exhaust air flow from the exhaust duct 1; 1 "in an efficient manner by first bonding it with the loose material 70 rod group 10; 10" from the air duct which changes phase from solid arrine to liquid, preferably having a temperature range between and 70 ° C, i.e. at the temperature between the supply air floc to the drying chamber and the exhaust air flow from the drying chamber (drying air), which phase change requires a lot of energy. Thereafter, the unloading material in the rods 7 in this rod group, which is liquid form, is known in an efficient manner by means of the supply air duct 1; 1 'give off its heat energy to the supply air flow 8; 81 to the drying chamber 9 medal] lOs material 70 second phase frail liquid back to solid subject. This heat exchanger 10, which is based on a phase change of a material, deviates hot from the known heat exchangers in its construction, already due to the fact that the parts of the heat exchanger, i.e. rod groups 1; 120 'and 10; 10 ", in the supply air duct 1; 1 'and the exhaust air duct 1; 1", do not communicate with each other in any other way via the control logic.
    The change of direction interval t for the drying air flow 8 in the chamber 9 is based in the invention on detecting a phase change of the unloading material 70 in the rods 7 in the heat exchanger in the supply air duct 1; 1 'and the exhaust duct 1; 1 ", on the basis of which a direction change interval t for the chamber 9 flowing drying air 8; 83, 84 is determined.
    French air duct 1; 1 "and the supply air duct 1; 1 'change places among themselves after a certain time interval t, which time interval t is determined separately based on whether the solution material 70 in the rods 7 in the rod group 10; 10" from the air duct 1; 1 "her discovered to be in liquid form in its entirety.
    The wood dryer according to the invention and the drying process for use therewith is based on the heat exchanger 10 being constituted by corresponding rod groups 10; 10 "and 10; 10 'mounted on both the exhaust air duct 1; 1" and the supply air duct 1; 1 '. each rod 7 in the rod groups is unloaded material 70 whose phase change temperature (vatskaifast a rine) Tf is within eft temperature range which is between the inlet temperature Ttill as the supply air 8; 81 to the supply air duct 1; 1 'has and has the highest permissible outlet temperature Tfran which is determined for the exhaust air 8; 82 from the exhaust duct 1; 1 ".
    Loose material.t 70 air suitably a so-called phase change material, for example an organic paraffin-based or fatty acid-based material. As an example darpa can be mentioned RubconTM.
    The phase change material can also be formed from an inorganic material, the salt of hydrates or a mixture of an organic material and an inorganic material. It is also possible to use plant-based phase change materials.
    To the supply air duct 1; 1 ', a cooler supply air flow (an air flow at the outdoor air temperature Tltill) enters through the supply air duct 1; 1 'inlet opening. Under its wave to the drying chamber 9 receives the supply air flood 8; 81, as air at the temperature of the outdoor air, heat energy while running between the rods 7 in the rod group 10; 'supply air duct 1; 1 '. The unloading material 70 in the rods undergoes a phase change from liquid to solid matter and at the same time emits phase change energy, which means that the rods 7 can emit a considerable amount of energy to the passing supply air flow 8; 81. The temperature of the pilot material 70 is maintained at a certain phase change temperature or within a certain relatively small phase change temperature range If while it is being converted from liquid to solid. After the release material 70 in the rod 7, which is in liquid form, has been converted by cooling to the solid hearth in its entirety, the temperature of the rod and the release material 70 in it begin to drop towards the supply air flow 8; 81 temperature T1to, and the rods 7 in the rod group can no longer preheat the supply air flow 8; 81 to the air duct.
    To the exhaust duct 1; 1 'in turn enters a hot and humid exhaust air flow 8; 82 from the drying chamber 9, which exhaust air flow delivers its heat energy to the unloading material 70 in the rods in the rod group 10; 10 ". The phase change of the loose material 70 from solid substance to liquid binds a considerable marginal energy, below which the temperature of the loose material 70 is maintained at a fixed phase change temperature or within a certain phase change temperature range. After the loose material 70 rod in its entirety has been converted to liquid, the temperature rises the bar Oka again due to the hot exhaust air flow 8; 82.
    The phase change temperature Tf for the unloading material 70 here is selected so that it is stored at the highest possible temperature in the drying air flow 8; 83, 84 in chamber 12. Nair the temperature of the osmaterial 70 in the rod from the air duct 1; 1 "reaches the temperature of the drying air 8; 83, 84 in the drying chamber 9, the unloading material 70 can no longer receive heat energy from the drying air and the flow direction of the drying air is often Figures 3A and 30).
    After that aft the direction of the river for the drying air 8; 83, 84 in the drying chamber 9 have been changed by watering the blowing direction of the flap 2, a duct which was previously a supply air duct 1 functions; 1 'now as exhaust duct 1; 1 ", and a duct that was previously an exhaust air duct 1; 1" now functions as supply air duct 1; 1 ', Since the unloading material 70 rods the rod group 10; 10 'supply air duct 1; 1 'received heat energy from the exhaust air flow 8; 82 from the chamber 9 said that it was converted from solid form to liquid, dot can now give off heat to the supply air flow 8; 81 to the chamber 9, [if the temperature of the supply air river Ti falls below the phase change temperature of the discharge material or the temperature range Tf within which the material, when in liquid form, is converted from liquid back to solid matter by simultaneously supplying phase change heat to the supply air river 8; 81 to the supply air duct 1; 1 '.
    Since the unloading material 70 the rods the rod group 10; 10 "in the exhaust air duct 1; 1" was previously in a supply air duct 1; 1 ', where during its conversion from liquid to solid matter it gave off its phase change energy to the supply air flow 8; 81 to the chamber 9, it can now motto heat energy Wan from the air flow 8; 82 and is converted from solid matter back to liquid, if the phase change temperature or phase change temperature range If falls below the temperature T2 from the exhaust air flow 8; 82 from the exhaust duct.
    In the method according to the invention (cf. Figures 7, 3A, 30), the temperature T1, T2 on the unloading material is detected by a rod, a supply air and an exhaust air duct 1, respectively; 1 ', 1 "in steps 100, 200. Then, steps 150, 250 are determined if the temperatures of the discharge material 70 in the rod supply air duct 1; 1' and the exhaust air duct 1; 1" are within a certain variation range. Both the temperatures T1 and T2 on the discharge material rods the supply air and exhaust air ducts should be kept within a temperature range between a minimum temperature and a maximum temperature. In practice, the temperatures T1 T2 on the unloading material 70 the rods 7 should be kept between the temperatures T1 to, T2 from the supply air supply 8; 81 and the exhaust air flow 8, respectively; 82. 13 Orn it yid a Ass time 11 after .previous change of direction of the drying air flow 8; 83, 84 it is discovered that the temperature T1 on the unloading material 70 the rods 7 rod group 10; Supply air duct 1; 1 'is outside the permitted wading area, ie. usually yid the supply air surface 8; 81 temperature To or below it, and if it has also been discovered that the exhaust air 8; 82 temperature T2 is the same or higher than the maximum permissible temperature T2 from the exhaust air flow, the Rasta step 300 is determined all the direction change time interval t fC.) Is the drying air flow 8; 83, 84 the chamber is the same as the time in question. The time interval ti refers to has, for example, which has elapsed after the previous national change of the drying air flow 8.
    Thereafter, the processor 42 creates a control command fC.) All during the respective time interval t wand the blowing direction of the flake 2 and thereby the flow direction of the drying air in the chamber 9 so that they become opposite. Since the drying air river 8; 83, 84 the direction of the chamber is turned 180 degrees (but is still transverse to the longitudinal direction of the timber stacks 6), the supply air duct 1 changes; 1 'and the exhaust duct 1; 1 "space between them.
    If there is a certain time t or previous change of direction of the drying air flow, it is discovered that the temperature T1 on the unloading material 70 the rods 7 the rod group 10; 10 'in the supply air duct 1; 1 "is outside the permissible range of variation, dye. Usually at the temperature of the supply air flow 8; 81 to or below it, and if it is further discovered here that the temperature T2 of the exhaust air flow 8; 82 is the same or higher than the maximum permissible temperature T2 from the exhaust air flow, it is determined the next step 300 that the direction change time interval t for the drying air flow 8; 83, 84 chamber is the same as the time t in question.
    Thereafter, the processor 42 creates the control unit 4 a control command to irradiate the blowing direction of the flange 2 and thereby the flow direction of the drying air in the chamber 9 so that they become opposite during the respective time intervals. Since the drying air river 8; 83, 84 direction in the chamber is turned 180 degrees (but still transversely to the longitudinal direction of the wood in the wood stacks 6), the supply air duct 1 changes; 1 'and the exhaust duct 1; 1 'place among themselves. Above, only certain preferred embodiments of the invention have been described, and one skilled in the art will appreciate that the invention has many other embodiments within the scope of the invention as defined in the claims.
    权利要求:
    Claims (16)
    [1]
    A wood dryer in which a drying chamber (9) is to be arranged, at least one stack (6) of wood grain is to be dried, and which drying chamber can be barred so that supply air (8; 81) can enter the said chamber through at least one supply air duct (1; 1 ') and said that from said chamber the exhaust air (8; 82) is deposited through at least one exhaust air duct (1; 1 "), the at least one exhaust air duct (1; 1") and the at least one supply air duct ( 1; 1 ') are arranged that during the drying of the wood to a desired humidity alternate space between them after a certain time interval (t), and each exhaust air duct (1; 1 ") and supply air duct (1; 1') in the drying chamber are arranged a heat exchanger (10), wherein the drying chamber (9) furthermore has a flap (2) for circulating air around the timber stacking stacks and their width direction, and a heating device (3) for heating the circulating air to a drying temperature, characterized in that the heat exchanger (10) in the respective supply air and exhaust air ducts (1) includes a rod group that is different from the Other rod groups (10; 10 '10 "), and at least one rod (7) each rod group (10; 10' 10") is closed both end-lady, and habit rod (7) is formed in a hollow space lady with arranged release material (70) roll-shaped or fixed form so that the phase change temperature of said release material (70) (liquid / solid) is within a temperature range Thag) which is between the temperature (Ttill) of the supply air (8; 81) to the supply air duct (1; 1 ') and the temperature ( Tfran) from the air (8; 82) from the exhaust duct (1, 1 ").
    [2]
    Wood dryer according to claim 1, characterized in that the different rod group (10; 10 'and 10, 10 ") in the heat exchanger (10) in the respective supply air duct (1; 1') and exhaust air duct (1; 1") include the same number of identical rods (7) with such length, shape and diameter that the usual rod group displaces about 15 - 35% of the volume of the air mass on the inside of the exhaust air duct (1; 1 ") or the supply air duct (1; 1 ').
    [3]
    Timber dryer according to claim 1 or 2, characterized in that all the rods (7) 1 and rod group (10; 10 'and 10, 10 ") are separate, all the rods (7) in the rod groups in the (Aka channels do not stand 1 physical contact with each other, and the attic materials in the rods (7) In the rod groups in the different channels there is no fluid communication with each other.
    [4]
    A wood dryer according to any one of the preceding claims, characterized in that the rods in the rod groups in the clique channels are vertical, and that the said 16 rod groups only communicate with each other by conducting the drying air.
    [5]
    Timber dryer according to one of the preceding claims, characterized in that the time interval (t) for the change of location between an exhaust air duct (1; 1 ") and a supply air duct (1; 1 ') is arranged in each individual case based on the heating layer. - ring / heat dissipation capacities of the rod group (10; 10 ") in the exhaust duct (1; 1").
    [6]
    Wood dryer according to claim 5, characterized in that the time interval (t) 'for a space exchange between an exhaust air duct (1; and a supply air duct (1; 1') is based on the heat provided by the unloading material (70) in the rods (7) in the respective rod group (10; 10 ', 10; 10 ") the supply air duct (1; 1') and the exhaust air duct (1; 1") receive or emit at their phase change temperature or morning their phase change temperature range, and also on heating or cooling of the discharge material (70) outside its phased change area.
    [7]
    Wood dryer according to one of the preceding claims, characterized in that the diameter of the rod (7) is 25 - 70 mm, and the material of its outer jacket, which is, for example, metal or plastic, has a good thermal conductivity and durability in a drying environment.
    [8]
    Wood dryer according to one of the preceding claims, characterized in that the rod (7) contains mineral oil, vegetable oil or salt-based material whose phase change temperature or temperature range is between the temperature (Ttill) of the supply air (8; 81) to the supply air duct ( 1; V) and the temperature (Tfran) of the exhaust air (8, 82) from the exhaust duct (1; ").
    [9]
    Timber dryer according to one of the preceding claims, characterized in that the distance between the exhaust air duct (1 ;, and the supply air duct (1; 1 ') is at least 2 meters.
    [10]
    A method for drying wood in a wood dryer according to claim 1, characterized in that the method comprises at least the following struts: supply air (8; 81) is fed, which here is a certain temperature (Tltill), to the drying chamber ( 9) through at least one supply air duct (1; 1 ') said that the supply air (8; 81) flows through the rod group (10; 10') in the supply air duct (1; 1 ') and at the same time preheats to another, higher temperature ( Tic) of heat from the rods (7) 17 the rod group (10; 10 ') heat exchange one and from the unloading material (70) in said rods, wherein at least a part of the heat energy received by the supply air originates tan to the unloading material (70) the rod, which is liquid form, second phase to solid form, - exhaust air (2) is discharged from the drying chamber (9) to at least one exhaust air duct (1; 1 ") so that it flows through the rod group (10; 10") in the heat exchanger ( 10) in the exhaust air duct (1; 1 ") and at the same time cool down to a lower temperature (T2from) by giving off heat to the rods (7) in the rod the group (10; 10 '') and to the unloading material (70) therein, wherein at least a part of the heat energy emitted by the exhaust air (8; 82) from the exhaust air duct (1; 1 ") passes the unloading material (70) into the rod, which draws in solid form, that second phase to liquid form.
    [11]
    A method according to claim 10, characterized in that all a supply air duct and an exhaust air duct change places between each other after a certain time interval (t), which time interval (t) is determined based on whether the loose material rod group the duct air duct here is discovered to be liquid or solid.
    [12]
    A method according to claim 10 or 11, characterized in that in the process the temperature (T1; T2) of the unloading material (70) in the rod group (10; 10 ', 10, 10 ") in the at least one supply air duct ( 1; 1 ') and the at least one exhaust duct (1; 1') with a Monitoring Unit (44; 44a, 4; 44b) to detect a phase change of the discharge material (70, 70) in the supply air duct (1; 1 ') and the exhaust duct, respectively. (1; 1 "), a time interval (t) is determined for a change of location between the exhaust air duct (1; 1") and the supply air duct (1; 1 ') with a processor (42) based on temperature, n (T1, T2) on the discharge material (70, 70) in the supply air duct (1; 1 ') and the exhaust air duct (1; 1 "), and a control command is created for a liquefied flow regulator, such as a flake (3), to irrigate the drying air surface (8; 83, 84). , that after the said time interval (t) it becomes opposite to the previous direction of the drying air flow, and the control command is applied to the air flow regulator, such as the flake (3), against a data transfer unit (45), for irrigating the drying air stream (8; 83, 84) opposite direction, i.e. 180 degrees relative to the proposed direction of the drying air flow, the drying air flow (8; 83, 84) running around the stapein (60) in its width direction. 18
    [13]
    Method according to claim 12, characterized in that the time interval (1) is determined by the processor (42) based on the feed temperature (T2) the release material (70) in the rods (7) in the rod group (10) from the exhaust duct (1; 1 ") is between a certain minimum temperature (T21k) and a certain highest temperature (T2hOg) determined for the discharge material from the air duct, said highest and lowest T2hog) temperatures in particular being the temperature (Tltill) of the air flow (8; 1 ') entering the supply air duct (1; 1'); 81) and the temperature (T2from) of the air flow (8; 82) discharged from the exhaust duct (1; 1 "), respectively
    [14]
    A method according to claim 13, characterized in that the time interval (t) is determined based on whether both the supplied temperature (T2) on the unloading material (70) the rods (7) the rod group (10) in the exhaust air duct (1; 1 ") and the fed the temperature (T1) of the discharge material (70) the rods (7) the supply air duct is between 20 and 70 0 0.
    [15]
    A control unit (4) for determining a time interval (t) in a wood dryer according to any one of claims 1 to 6 by a statement according to any one of claims 7 to 10, characterized in that the control unit (4) for the wood dryer here at least a memory (41) having a computer program code (43), which at least one memory and the computer program code are all arranged together with at least one processor (45) for the control unit (4) to do at least the following things: that with a monitoring unit (44; 44a, 44b) detect a phase change of the unloading material the rods (7) in the rod group heat exchanger (10) in at least one supply air duct (1; 1 ') and at least one exhaust air duct (1; 1 "), all with a processor (42) on a base of the detected phase change of the unloading material determine a time interval (t) during which the exhaust air duct (1; 1 "), / the exhaust air ducts and the supply air duct (1; 1 ') to the air ducts must change places between each other, and that by transmitting a data transfer unit (45) and dry air flow regulator, such as a float (3), send a control command to change the direction of the drying air flow (8). 19
    [16]
    A computer program code (43) arranged to perform a method according to any one of claims 9 to 13, wherein the computer program code (43) is executed by a processor (42) in a control unit (12) according to claim 14. 8: 8 09 el: I Z8: 8 „css, t = 0 START / Mat T1 Ls Second direction
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    同族专利:
    公开号 | 公开日
    FI126986B|2017-09-15|
    FI20145269A|2015-09-22|
    SE538418C2|2016-06-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO2021010876A1|2019-07-17|2021-01-21|Zeilon Sten|Drying chamber dehumidified by diffusion|
    CN110044145A|2019-04-22|2019-07-23|浙江工业大学|A kind of high voltage electric field and heat pump united drying system|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FI20145269A|FI126986B|2014-03-21|2014-03-21|Wood dryer and method for drying wood in said wood dryer, controller used in the process and computer program code for carrying out the procedure|
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