• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
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  • 优先权
    • 专利摘要:
    preconditioner for preconditioning edible materials, extruder for processing edible materials and methods of treating an edible material. apparatus (20) for injecting fluid into components of an extrusion system such as a pre-conditioner (24) or extruder (100) is provided, preferably as a composite assembly including a fluid injection valve (52) and a interconnected static mixing section (54). alternatively, use can be made of the fluid injection valve (52) or static mixing section (54) alone. the invention greatly simplifies the fluid injection apparatus used in extrusion systems, while providing more efficient absorption of thermal energy with a minimum of environmental contamination, and the ability to inject multiple streams into the extrusion systems. both the pre-conditioner and the extruder are described, as well as the methods of treating edible material.
    公开号:BR112015002648B1
    申请号:R112015002648-6
    申请日:2014-06-23
    公开日:2021-08-03
    发明作者:Brian D. Streit；Scott Eugene Van Dalsem
    申请人:Wenger Manufacturing, Inc；
    IPC主号:
    专利说明:

    Background of the invention field of invention
    [0001] The present invention relates, broadly, to improved apparatus for injecting various fluids in extrusion system processing components, such as pre-conditioners and extruders. More particularly the invention relates to such apparatus, alone or in combination with extrusion system processing components that include injection valves, preferably with interconnected static mixing sections to efficiently inject steam/water mixtures (and other optional fluids, if desired) using enormously simplified equipment. Description of prior art
    [0002] Extrusion cooking systems have long been used for processing various types of edible products, such as human food or animal feed. Such systems have a number of different components, but the main processing components are an upstream product pre-conditioner coupled to a downstream extruder. In the preconditioner, initially dry ingredients are typically mixed with water and/or steam and oil to unify the partially precooked ingredients. The pre-conditioned products are then fed to the extruder where the materials are subjected to increasing levels of temperature, pressure and shear and are extruded from the constrained orifice die structure. In some cases, additional steam and/or water is injected into the extruder barrel during processing, as an extrusion aid, and to facilitate complete cooking and shaping of final products.
    [0003] Conventional preconditioners generally include an elongated vessel or shell having therein one or two axially rotatable elongated shafts having outwardly extending mixing elements or agitators therein. When ingredients are advanced towards the exit of the carcass, moisture in the form of steam or water is injected at separate locations along the length of the carcass. Consequently, these pre-conditioners are equipped with corresponding collectors with injectors that lead to the interior of the housing. In addition, distribution hoses are usually attached to the collectors for moisture distribution. This complicated apparatus can be difficult to maintain and clean, and requires sophisticated manual operator control to ensure adequate humidification at different injection locations. For example, US Patent number 7,906,166 illustrates several injector humidification apparatus attached to a preconditioner housing. In other cases, such additional sets are used for injection along virtually the entire length of the preconditioner housing.
    [0004] These conventional preconditioners tend to generate and discharge a significant amount of steam during their use. This is a serious problem for processors, due to the fact that this escaping hot steam can easily mix with food particulates creating a contamination problem as the materials coat the components of the extrusion system and the surrounding environment. This contamination is aesthetically unpleasant and can also create several microbiological contamination problems. Furthermore, excess steam evolution is a very inefficient waste of thermal energy.
    [0005] Injectors used with typical preconditioners are relatively small in diameter, usually on the order of one-half to five-eighths of an inch, and can be relatively long in length, up to 6 inches. Thus, it is quite common for injectors to become partially or completely clogged during operation of pre-conditioners, requiring downtime and maintenance/cleaning.
    [0006] Several of these problems are duplicated where extruders are equipped with conventional injectors, though not usually to the same extent as for conditioners. Nevertheless, it can be difficult to continuously control and operate an extruder when injection/contamination issues are faced.
    [0007] There is therefore a need in the art for an improved injection apparatus that can be used with pre-conditioners and/or extruders to more efficiently inject diverse fluids, while minimizing the clogging and contamination problems endemic with extrusion systems while optimizing the use of thermal energy. Invention Summary
    [0008] The present invention overcomes the problems outlined above and provides improved apparatus for injecting fluids into extrusion system processing components such as a preconditioner housing and/or an extruder barrel. The preferred apparatus comprises a static fluid mixing section that includes an elongated tubular housing having a plurality of fluid inlets, a mixing assembly stationary within the housing operable to mix various fluids, and an outlet for dispensing mixed fluids from the housing. static mixer. The preferred apparatus further comprises an injection valve which includes a fluid inlet operatively coupled with the static mixer outlet, a mixed fluid outlet, and displaceable control valve structure, and an actuator operably coupled to the valve structure for its selective displacement. The overall apparatus is structured to allow coupling the fluid outlet of the valve to an extrusion system component selected from the group consisting of a preconditioner housing and an extruder barrel.
    [0009] The composite static mixing valve/injector apparatus can be used with a pre-conditioner and/or an extruder for fluid injection. In the case of a preconditioner only a single composite apparatus is normally required, and in the case of an extruder, several apparatus may be used adjacent to the inlet end of the extruder barrel.
    [0010] Although composite apparatus is preferred, the invention is not so limited. That is, a pre-conditioner can be supplied including a fluid injection apparatus consisting of an isolated injection valve that allows selective injection of fluid into the pre-conditioner housing; the injection valve includes a fluid inlet, a fluid outlet, and displaceable valve structure for selectively controlling fluid flow from the valve inlet to the valve outlet.
    [0011] To minimize or eliminate clogging of the fluid injection apparatus, the axial distance between the valve outlet and the interior surface of the preconditioner housing should be less than approximately 3 inches, advantageously less than approximately 1 inch, and more preferably less than about half an inch. Similarly, the diameter of the injection apparatus fluid transport structure should be relatively large, preferably at least approximately 1 inch. The combination of the large diameter fluid transport structure together with the valve's short injection distance essentially ensures essentially clog-free operation of the preconditioner.
    [0012] The same considerations apply in the context of fluid injection apparatus for extruders, that is, the fluid transport components and the injection path lengths should be designed using the same diameter/length parameters described above in the case of pre-conditioners.
    [0013] Although the composite fluid static mixer/injector valve section injection apparatus is preferred, improvements can be made using these components separately, i.e. a pre-conditioner or extruder can be equipped only with the injection valves of the invention or, conversely, use can be made of static mixing sections, without the need for injection valves.
    [0014] The invention relates primarily to the injection of steam and/or water for extrusion components. However, other ingredients or additives can be injected separately and/or together with moisture, such as fats, dyes, emulsifiers and the like. Brief description of the drawings
    [0015] Figure 1 is a perspective view of a preconditioner according to the invention, equipped with an improved fluid injection assembly that includes a fluid valve injector and a static mixing section;
    [0016] Figure 2 is a fragmentary top view of the preconditioner shown in Figure 1;
    [0017] Figure 3 is a vertical sectional view taken along line 3-3 of Figure 2;
    [0018] Figure 4 is a perspective view of the access port of the preconditioner of Figure 1 that includes a mounting bracket for an injector valve of the fluid injection assembly;
    [0019] Figure 4A is an enlarged fragmentary view illustrating a fluid injection valve assembly mounted on the port support of Figure 4;
    [0020] Figure 5 is a side view of a fluid injection assembly comprising a vertical static mixing section, but without the use of a fluid valve injector;
    [0021] Figure 6 is a side elevation view of the internal mixing element that is part of the static mixing section;
    [0022] Figure 7 is a perspective view of a twin screw extruder having four fluid injection assemblies mounted on the barrel of the extruder, with the assemblies comprising fluid valve injectors without the use of static mixing sections;
    [0023] Figure 8 is a sectional view of a barrel section of the twin screw extruder and illustrating four of the injection valve injectors mounted on a barrel section of the extruder;
    [0024] Figure 9 is an enlarged fragmentary sectional view of one of the valve injectors outlined in Figure 8, and illustrating other details of the valve injector; and
    [0025] Figure 10 is a view similar to that of Figure 7, but illustrating fluid injection assemblies that include both fluid valve injectors and static mixing sections. Detailed description of the preferred modality
    [0026] Turning now to Figures 1-4, a preconditioner 20 is illustrated equipped with a composite fluid injection assembly 22 mounted thereon for dispensing mixed fluids, such as steam and water, into the pre. -conditioner. The preconditioner is of the type described in US Patent number 7,906,166 which is hereby fully and fully incorporated by reference.
    Broadly, preconditioner 20 includes an elongated mixing housing 24, with a pair of axially elongated rotatable mixing shafts extending parallel to 26 and 28 within, and extending along its length. Axes 26, 28 are operatively coupled with individual digitally controlled variable speed/steering drive devices (not shown). Preconditioner 20 is adapted for use with a downstream processing device, such as an extruder or pellet mill, and is used to humidify and partially cook edible materials such as human food or animal feed.
    [0028] In more detail, the carcass 24 has an elongated, transversely arcuate sidewall 30, which features a pair of interconnected, interposed, elongated chambers 32 and 34, as well as a material inlet 36, a lower material outlet (not shown) and a steam discharge (vent) 38. Chamber 34 has a greater cross-sectional area than adjacent chamber 32, as will be readily apparent from a consideration of Figure 3. Sidewall 30 has four ports. hingedly mounted access ports 40, and assembly 22 is secured to the rearmost access port 40, which communicates with chamber 34. This access port 40 is equipped with a mounting plate 42 having an injection opening 43 which extends through the port and has an innermost injection opening 43a (figure 4A). Of course, the mounting plate 42, or other similar equipment, can be attached to other portions of the sidewall 30, at the choice of the designer. Opposite ends of housing 24 are equipped with end plates 44 and 46 as shown.
    [0029] Each of the shafts 26, 28 has a plurality of outwardly extending mixing elements 48 and 50 thereon that are designed to agitate and mix material fed to the preconditioner and to transport the material from the input 36 towards and through the bottom output. Elements 48 are displaced axially with respect to elements 50 and elements 48 and 50 are interposed, i.e. elements 50 extend into the cylindrical operating envelope presented by axis 26 and elements 48, and vice versa. Although elements 48, 50 are shown as being substantially perpendicular to axes 26, 28 the invention is not so limited; in addition, elements 48, 50 are adjustable in both length and pitch of the user's choice. It will be seen that the axis 26 is located substantially along the centerline of the chamber 32 and that the axis 28 is likewise located substantially along the centerline of the chamber 34.
    [0030] The composite fluid injection assembly 22 of this embodiment broadly includes a fluid injection valve assembly 52 and a static mixing section 54 and is designed to inject a plurality of mixed fluids into the preconditioner 20 , such as water vapor or steam/water/additives. As explained in more detail below, assembly 22 simplifies the equipment required for fluid injection, is more sanitary, increases the energy yield of the pre-conditioner, and results in higher levels of moisture and/or cooking in the pre-conditioned products , when compared with conventional fluid injection equipment.
    [0031] The injection valve assembly 52 (figure 4A) includes a selectively actuatable valve body 56, which has an internal mechanical drive (not shown) with an axially rotating rod, extending outwardly 58. The rod 58 is connected to a ball valve ball 60 having a central passage 62. The ball 60 is located within a tubular segment 64 which is accommodated within an outer valve sleeve 66. The embedded end of the sleeve 66 is secured to the valve plate. assembly 42 by means of threaded fasteners. It will be appreciated that the central passage 62 and the segment bore 64 are of equal diameter and that the inner and outer opposing faces 68, 69 of the track 64 respectively define the fluid outlet 70 and the fluid inlet 71 of the valve assembly 52. In preferred practice, valve assembly 52 is an automated valve that can be controlled as a part of an overall digital control system for preconditioner 20. However, other types of valves may be used in this context.
    [0032] The static mixing section 54 includes a vertical tubular casing 72 with an uppermost tubular steam inlet 74 and an oblique water inlet 76, preferably equipped with an atomizer 77. A static mixer 78 is situated within the casing 72 and includes an elongated stationary center shaft 80, with a plurality of generally helical outwardly extending plates 82 secured to shaft 80. The function of mixer 78 is to intensively mix incoming streams of water vapor, and any other desired additives for dispensing to the injection valve assembly 52. For this purpose a T-tube 84 is secured to the bottom end of the housing 72 and its transverse leg is operatively coupled to the inlet 71 of the valve assembly 52 by means of conventional piping. 86.
    [0033] The lower end of the T 84 is equipped with a tube section 88, reducer 90 and condensate outlet tube 92. Tube 92 has an intermediate valve 94 which is controlled by solenoid 96. A resistance temperature probe 98 is operationally coupled with tube 92 below valve 94 and serves to measure the temperature of the steam condensate and monitor the presence of live steam before system start-up; once the temperature reaches 100°C, valve 94 closes and the system can start. Naturally, probe 98 and solenoid 96 are connected to the global digital control system for preconditioner 20 for automated control of valve 94.
    [0034] An important aspect of the invention is the geometry of the injection valve assembly 52 and the injection opening 43. To substantially reduce, or even eliminate the possibility of clogging the valve assembly 52, the diameters of the injection opening 43 , injection port 43a, valve ball passage 62, segment bore 64, valve inlet 71, and valve outlet 70 should all be at least approximately 2.54 cm (1 inch), and more preferably from approximately 2.54 to 5.08 cm (1-2 inches), and advantageously be all of the same diameter. In addition, the axial distance between fluid outlet 70 and injection outlet opening 43a should be kept to a minimum. This distance should be no more than approximately 7.62 cm (3 inches), preferably less than approximately 5.08 cm (2 inches), even more preferably less than approximately 2.54 cm (1 inch), and more preferably less than approximately 1.27 cm (half inch).
    [0035] During normal operation of the preconditioner 20 dry ingredients are fed to inlet 36 during rotation of shafts 26, 28. Simultaneously, appropriate amounts of steam and/or water are directed through inlets 74, 76 and are thoroughly mixed during passage through static mixing section 54. This mixed mixture is passed to injection valve assembly 52 through T 84 and tubing 86, whereby it is injected into housing 24 to mix with the dry ingredients. During this sequence valve 94 is closed. When temperature probe 98 detects accumulation of condensate above valve 94, the latter is opened to allow collected condensate to drain from the system through pipe 92.
    [0036] Although the composite fluid injection assembly 22 has been shown and described in connection with a preconditioner, this assembly can also be used in the context of single screw or twin screw extruders. In addition, improved fluid injection results can be obtained when using the individual components of assembly 22. Hence, any pre-conditioners or extruders can be equipped with fluid injection valve assemblies 52 or static mixing sections 54 to achieve results improved. It is preferred, however, to employ the composite injection assembly 22.
    [0037] For example, Figure 7 illustrates a twin screw extruder 100 equipped with four fluid injection valve assemblies 52 attached to the inlet head 102 of the extruder. Extruder 100 itself is of conventional design, and includes an elongated tubular multi-head extruder barrel 104 consisting of inlet head 102, intermediate head 104, and end head 108. As illustrated, inlet head 102 is equipped with an inlet head 102. material 110 adjacent to the inlet end of the keg 104, while a constrained orifice matrix assembly 112 is provided at the outlet end of the keg. Internally, extruder 100 has a pair of elongated, axially rotating, multi-section extruder screws, each having a central axis with helical vanes extending outwardly over it (see figure 9). Material delivered to inlet 110 is subjected to increasing levels of temperature, pressure and shear during passage through the extruder, and such material is finally extruded through assembly 112.
    [0038] During the extrusion course of various types of edible materials, it is important that steam and/or water with or without additional ingredients are injected into the barrel where they are completely mixed with the ingredients previously pre-conditioned during the process cooking with extrusion. In the embodiment of Figure 7 four of the injection valve assemblies 52 are secured to the inlet head 102 at respective locations where injection holes 114 are formed through the side wall of the head 102, terminating in openings 114a. A water and/or steam line 116 is attached to the inlet of each valve assembly 52 in place of the piping 86. Figure 10 illustrates the extruder 100, but in this case equipped with the complete fluid injection assemblies described above 22, mounted on the head 102. Figure 9 further illustrates the interiors of the twin screw extruder 100 including the aforementioned pair of extruder screw assemblies labeled 120, 122 located within an extruder barrel. Another option would be to have only a single static mixer section 54 for connection to the four injection valves 52 shown in figure 10.
    [0039] In the foregoing extruder embodiments, the fluid injection assemblies each have fluid injection valve assemblies 52 included. In these embodiments the same geometric considerations apply as in the case of the preconditioner embodiments. Specifically to avoid clogging the diameters of passages 62 and bore 117 should both be at least approximately half an inch and more preferably from approximately 2.54 to 5.08 cm (1-2 inches) and are preferably of the same diameter. The axial distance between fluid outlet 70 and opening 114a should be no more than approximately 7.62 cm (3 inches), preferably less than approximately 5.08 cm (2 inches), even more preferably less than approximately (1 inch), and more preferably less than about 1.27 cm (half inch).
    [0040] In other cases, use can be made of an injection set without an injection valve. As illustrated in Figure 5, a fluid injection assembly may include the previously described static mixing section 54 with a T 84 and related tubing that is attached directly to a preconditioner and/or extruder barrel, as the case may be.
    [0041] The use of composite fluid injection assembly 22 with pre-conditioner 20 results in a number of important advantages that cannot be obtained with a preceding fluid injection apparatus, typically making use of a plurality of associated injectors and collectors, piping and hoses. For example, the preferred composite fluid injection apparatus provides at least the following improvements:
    [0042] Static Mixer - mixes/combines water vapor (and optional additional ingredients) by delivering superheated water to the conditioning cylinder. . No mechanical mixing No mixing with venturi
    [0043] Static Mixer Water Injector - Atomizes water to provide more surface area to condense steam in the static mixer
    [0044] Automated Control Valve - Automated opening/closing of a valve that is mounted close to the conditioning cylinder body allows for efficient distribution of water vapor to the process, and is mounted in a manner to minimize the distance between the valve and the cylinder body to reduce the potential for injector clogging.
    [0045] . Condensate resistance temperature detector - determines the accumulation of condensate
    [0046] Condensate Solenoid Valve - Upon detection of condensate the solenoid valve opens to drain the condensate.
    [0047] System Controls - Controls are tied into the Wenger APM global extrusion system control software for automated control of the valve and condensate temperature detector.
    [0048] The main advantages of fluid injection sets include:
    [0049] Reduce the number of steam and water injection ports from typically 5-6 for steam and water injectors (10-12 total) to one.
    [0050] Simplify system control for operators and fault detection for maintenance. reduces operator influence on the system, allowing for better automated control, improves operation and product quality consistency.
    [0051] Eliminate the need for multiple steam and water collectors.
    [0052] Improve sanitary design of the conditioning cylinder by reducing the number of obstructions to clean.
    [0053] Reduce the number of valves, hoses, injectors that must be maintained and replaced.
    [0054] Locating the fluid injection valve on the pre-conditioner housing or extruder barrel greatly reduces the potential for injector clogging: increase equipment operating time improve process control improve product consistency and quality
    [0055] Reduce discharge of steam discharged from the system. increase steam and water consumption on a unit basis reduce food safety risk sanitizing water vapor and steam and fine food particulate matter that goes into the atmosphere and potentially contaminates equipment and the environment.
    [0056] Use a static mixer to combine process steam and water; increase the water temperature to allow better absorption for the product to reduce water vapor that may blow through the product and not be absorbed.
    [0057] Higher product temperatures from the preconditioner improved adsorption of steam and water inlets results in higher product temperatures reaching set point temperatures at lower steam and water inlets.
    [0058] Higher starch gelatinization values (cooking) Higher cook values during preconditioning provide opportunity for higher final product cook values from the extruder.
    [0059] As indicated, the use of fluid injection apparatus is particularly important in the case of preconditioning food or food materials before their extrusion. To demonstrate the superiority of the present invention against conventional fluid injection apparatus, a series of test runs were carried out using the improved preconditioner of the invention equipped with the composite assembly 22 of the invention against an otherwise identical preconditioner which it has the various normal steam/water injectors along the length of the preconditioner housing. In all cases, the individual comparative tests involved the same food recipes (pet food (PET) or aquatic) with the same thermal energy inputs, retention times, and the like.
    [0060] The test results confirm that the preferred apparatus of the invention consistently produces higher cook values (as measured by the extent of starch gelatinization) at a variety of preconditioner mixing intensities and feed rates. These improvements coupled with the reduction in vapor discharge from the apparatus of the invention and consequently better energy utilization, are salient aspects of the invention.
    权利要求:
    Claims (19)
    [0001]
    1. A preconditioner for preconditioning edible materials, comprising: an elongated housing (24) having a sidewall structure (30), an edible material inlet (36), a spaced preconditioned material outlet, and a direct fluid passage through said sidewall structure (30) and having an innermost opening (43a) in communication with the interior (34) of the housing (24); at least one axially rotatable elongated shaft (26, 28) extending along the length of said housing (24), which has a plurality of outwardly extending mixing elements (48, 50) secured to the shaft (26, 28) ; and apparatus for injecting fluid (22) into said carcass; characterized in that: said injection apparatus (22) comprises an injection valve (52) operatively coupled with said fluid passage to allow selective injection of fluid into the interior (34) of the housing (24) during material processing therein, said injection valve (52) including a fluid inlet (71), a fluid outlet (70) and a displaceable valve structure (60) that allows selective control of fluid flow from the fluid inlet. (71) to and through the fluid outlet (70); and the preconditioner (20) further comprises an elongated static mixer (54) having a plurality of fluid inlets (74, 76), one of said fluid inlets being a water or steam inlet, and a fluid outlet. mixed (86) operatively coupled with said injector valve (52) to supply a mixed fluid to said fluid inlet of the injector valve (52), the pre-conditioner being operable to mix said edible materials with said fluids and water to humidify edible materials.
    [0002]
    2. Preconditioner according to claim 1, characterized in that the static mixer (54) includes an elongated housing (72) having a plurality of fluid inlets (74, 76), and a stationary mixer assembly ( 78) located within the housing (72) and operable to mix said plurality of supply fluids to said fluid inlet (71) of the injection valve (52).
    [0003]
    3. A pre-conditioner according to claim 2, characterized in that the stationary mixer assembly (78) includes an elongated central shaft (80) having a plurality of substantially outwardly extending helical plates (82) attached to said axis (80).
    [0004]
    4. Pre-conditioner according to claim 1, characterized in that said casing (72) of the static mixer (54) extends upwards from the injection valve (52)
    [0005]
    5. Pre-conditioner according to claim 1, characterized in that said valve structure comprises a ball valve ball (60) with a passage (62) therethrough.
    [0006]
    6. Pre-conditioner according to claim 1, characterized in that it includes an actuator (56) operatively coupled to said valve structure for the selective displacement thereof.
    [0007]
    7. Pre-conditioner according to claim 1, characterized in that said passage has a diameter of at least 2.54 cm.
    [0008]
    8. A method of treating an edible material, comprising the steps of: passing the edible material to and through an elongated housing (24) having a material inlet (36) and a material outlet spaced apart, and at least one axis axially rotatable (26, 28) within the housing (24) having a plurality of outwardly extending mixing elements (48, 50) secured to the shaft (26, 28); and while said material is passing through said housing (24), axially rotating said shaft, and feeding a fluid to a fluid inlet (43a) of the housing (24) for mixing with the material; characterized in that said step of feeding the fluid comprises the steps of: directing individual amounts of steam and water into a static mixer (54); mixing the steam and water within a casing (72) of the static mixer (78) to create a homogeneous mixture; and then injecting the homogeneous mixture through said fluid inlet (43a) of the housing (24).
    [0009]
    9. Method according to claim 8, characterized in that said fluid consists essentially of steam and water.
    [0010]
    10. Method according to claim 8, characterized in that said injection step comprises the step of directing the homogeneous mixture through a valve structure comprising a displaceable valve element (60).
    [0011]
    11. Method according to claim 10, characterized in that said valve element (60) is a rotary ball valve.
    [0012]
    12. An extruder for processing edible materials, comprising: an elongated tubular barrel (104) having an edible material inlet (110) and a restricted orifice die outlet (112), the barrel (104) having at least one fluid passage through it having an innermost injection opening (114a) in communication with the interior of the barrel (104); at least one axially rotating elongated screw (112, 120), with helical vanes, within said barrel (104) and operable to move material from said inlet (110) towards and through said restricted orifice die outlet ( 112), to thereby subject the edible materials to increased levels of temperature, pressure and shear, the extruder (100) being operable to produce human food or animal feed; and apparatus (22) for injecting fluid into said barrel; characterized in that said injection apparatus (22) comprises an injection valve (52) operatively coupled with said fluid passage to allow selective injection of fluid into the barrel (104) during processing of the edible material therein, said injection valve (52) including a fluid inlet (71), a fluid outlet (70) and a valve structure (60) that allows selective control of fluid flow from the fluid inlet (71) to and through the fluid outlet (70), said injection apparatus (22) further comprising an elongated static mixer (54) having an outlet for a fluid mixture that is operatively coupled with the injection valve (52) to feed a mixture. of fluids at said inlet (71) of the injection valve (52).
    [0013]
    13. An extruder according to claim 12, characterized in that the static mixer (54) includes an elongated housing (72) having a plurality of fluid inlets (74, 76) and a stationary mixer assembly (78) situated within the housing (72) and operable to mix said plurality of fluids for supply to said fluid inlet (71) of the injection valve (52).
    [0014]
    14. An extruder according to claim 13, characterized in that the stationary mixer assembly (78) includes an elongated central shaft (80) having a plurality of substantially outwardly extending helical plates (82) secured to said shaft ( 80).
    [0015]
    15. Extruder according to claim 12, characterized in that said casing (72) of the static mixer (78) extends upwards from the injection valve (52)
    [0016]
    16. Extruder according to claim 12, characterized in that the axial distance between said fluid outlet (70) of the injection valve (52) and the innermost injection opening (114a) is less than 7.62 cm .
    [0017]
    17. A method of treating an edible material, comprising the steps of: passing said edible material to and through an elongated extruder barrel (104) having a material inlet (110) and a restricted orifice die outlet (112) , spaced from the material inlet (110), and at least one elongated, axially rotating shaft (112, 120), with helical vanes, within the extruder barrel (104) and operable to displace edible material within the barrel, from said inlet (110) to and through the restricted orifice matrix outlet (112); and while said material is passing through the extruder barrel (104), axially rotating said shaft, and feeding a fluid to a fluid inlet (114a) of the barrel (104) for mixing with the edible material; characterized in that said step of feeding a fluid comprises the steps of directing individual amounts of steam and water into a static mixer housing (72) to create a homogeneous mixture; and then injecting the homogeneous mixture into said fluid inlet (114a) of the barrel (104).
    [0018]
    18. Method according to claim 17, characterized in that it comprises the step of passing said homogeneous mixture through a valve structure (60) before its passage to said fluid inlet (114a) of the barrel.
    [0019]
    19. Method according to claim 18, characterized in that said valve structure (60) comprises a rotary ball valve.
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    法律状态:
    2018-02-27| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-10-22| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-06-01| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-08-03| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 23/06/2014, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US13/937,573|2013-07-09|
    US13/937,573|US9713893B2|2013-07-09|2013-07-09|Method of preconditioning comestible materials using steam/water static mixer|
    PCT/US2014/043662|WO2015006040A1|2013-07-09|2014-06-23|Steam/water static mixer injector for extrusion equipment|
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