• 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:
    A spray drying method comprising forming a layer of solid particles at the bottom of a drying chamber defined by a vertical cylinder, blowing gas into said layer from the underside to agitate the whole of said layer and thereby to form a fluidized bed of solid particles with part of said particles being blown up from the upper surface of said fluidized bed and suspended within said drying chamber, blowing gas into said drying chamber in a direction to form a swirling downward gas flow along the side wall and a swirling upward flow along the center of said drying chamber, whereby said suspending particles are caused to make a circulatory motion while being entrained in said swirling gas flows in such a manner that the fine particles spirally move upward in the center of the drying chamber and at least the major part thereof approach the side wall of the drying chamber under the effect of centrifugal force before they reach the top of said drying chamber and finally spirally move downward along the side wall of said chamber, said particles being partially returned to said fluidized bed and partially being carried upward again in the center of the drying chamber by being entrained in said swirling upward gas flow, spraying stock solution into said drying chamber, the droplets of said sprayed stock solution colliding against and adhered to said circulating particles to form larger sized particles, said larger sized particles being dried by the surrounding gas and partially circulated within said drying chamber and partially falling into said fluidized bed, and discharging said larger sized particles from said fluidized bed while maintaining the depth of said fluidized bed substantially constant.
    公开号:SU751336A3
    申请号:SU731978853
    申请日:1973-12-11
    公开日:1980-07-23
    发明作者:Асизава Наохито；Коно Мотоми
    申请人:Асизава Текко Кабусики Кайся (Фирма)；
    IPC主号:
    专利说明:

    (54) SPRAY DRYER
    one
    The invention relates to a technique for drying solutions and suspensions and can be used in the chemical, food and other industries to produce granular materials.
    The known spray dryer contains a chamber equipped in the upper part with a nozzle for supplying a material to be dried, a cylindrical cup and a gas outlet manifold, and in the lower part - a gas distribution grill and a chute 1 dried to it in a boiling layer.
    The disadvantage of such a dryer is the low specific productivity per unit volume, which leads to large dimensions of the dryer.
    The aim of the invention is to reduce the size of the dryer.
    This is achieved by the fact that the glass is placed between the chamber and the vapor collector and is equipped with tangential gas inlet pipes in a downward spiral.
    A source of compressed gas can be connected to the chute, and a cylinder with a fairing along its axis is installed at the junction of the glass with the chamber. Additionally, the camera is equipped with a shirt.
    The drawing schematically depicts the spray dryer described.
    The dryer contains chamber 1, gas distribution grid 2, air duct 3, air duct 4 with damper 5, blower 6, heater 7, conical adapter 8, cylinder 9, cylindrical cup 10, in the lower part of which there is an annular gap 11 formed by cylinder 9, an additional air duct 12, enclosing the cup 10 in its upper part and connected to the additional duct 13 with the flap 14, the blower 15 and the heater 16. The cup 10 is equipped with tangential nozzles 17 for introducing air from the duct 12 to the bottom spiral it. A gas outlet manifold 18 and a tail fan 19 with a flap 20 are connected to the duct 12 at the top. A branch pipe 21 serves to introduce the seed particles. The chamber 1 is externally equipped with a jacket 22. The solution supply system includes a nozzle 23 connected to the tank 24, a pump 25 and a pipeline 26 The dried granules are unloaded through the chute 27 with the valve 28 and the hopper 29 with the gate 30. A source of compressed gas 31 with the valve 32 is connected to the bunker 29. A fairing 33 is installed along the axis of the cylinder 9, and an auxiliary tangential inlet 34-to ozduha for twisting direction generated nozzles 17.
    Spray dryer works in the following way.
    Before starting work, blowers 6 and 15, tail fan 19, heaters 7 and 16 are included, and coolant is supplied to jacket 22 to create the required temperature in chamber 1. Seed particles of the same composition as the final product are then introduced into the chamber 1 through the pipe 21. The number of seed particles should provide on the grid 2 a uniform fluidized bed with a thickness of 5-30 cm. The amount of air entering the duct 3 through the duct 4 is controlled by the flap 5, and in the additional duct 12 by the flap 14.
    Air from the bed rises in chamber 1, enters cylindrical cup 10 through cylinder 9, passes cup 10 and exits through manifold 18. Air coming from box 12 through nozzles 17 moves in cup 10 along a downward spiral, enters through annular gap 11 into the conical adapter 8 and down the periphery of the chamber 1. Then this air changes its direction upward and enters the chamber 1 through the cylinder 9. The particles suspended in the chamber 1 are subjected to centrifugal force as a result of the vortex of the air flow. In this case, larger particles circulate in chamber 1.
    The air flow moving upward through the cylinder 9 is accelerated by the flap 33. In this case, small particles are thrown against the wall of the glass 10 and picked up by the downward spiral air flow. The amount of air entering through the nozzles 17 exceeds the amount of air entering through the grid 2 by 30% or more, and its speed at the exit from the nozzles 17 is 35 m / s or more.
    The solution is supplied to the chamber 1 by a nozzle 23 connected via pipe 26 to the pump 25 and the tank 24. The fine particles of the sprayed solution quickly dry under the influence of the surrounding hot air. Some of them in the drying process stick together with dry particles and move up or down. The other part can get on the walls of the chamber 1 and stick to them. However, these particles are further stripped from the walls by a stream of powdered particles swirling downward and included in the circulation streams. Some drops reach the surface.
    fluidized bed in which they are dried. Due to the spraying of the solution on the dry particles, particles of high bulk density are formed during the process of the process.
    The dried material is unloaded into the bunker 29 through the chute 27 when the clan is opened 28, and the material is removed from the bunker 29 through the gate 30. The bunker 29 is supplied with air from the source of compressed gas 31 in a quantity depending on the resistance of the chute 27 and the layer. The speed of the air supply to the chute 27 is controlled by the valve 32. The spray dryer described is smaller in size as compared to conventional spray towers. The dryer can be used to obtain granules while simultaneously carrying out chemical reactions by exposure to a reactive gas, such as SLg, CO g or SO a, on the granules into which the liquid interacting with this gas is introduced.
    权利要求:
    Claims (4)
    [1]
    1. Spraying substance containing a chamber equipped in the upper part with a nozzle for supplying the material to be dried, a cylindrical cup and a gas outlet with a collector, and in the lower part a gas distributor and an outlet for the granules dried in the fluidized bed, characterized in that what,
    In order to reduce overall dimensions, the beaker is placed between the chamber and the exhaust manifold and is equipped with tangential gas inlets in a downward spiral.
    [2]
    2. Dryer according to claim 1, characterized in that a source of compressed gas is connected to the chute.
    [3]
    3. Hustilator according to claim 1, characterized in that at the junction of the glass with the chamber a cylinder with a fairing is installed along its axis.
    [4]
    4. The suschilka according to claim 1, wherein the camera is provided with a jacket.
    Sources of information taken into account in the examination 1. Copyright certificate № 238402, cl. F 26 B 3/12, 1964.
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    类似技术:
    公开号 | 公开日 | 专利标题
    SU751336A3|1980-07-23|Pulverizing dryer
    US2561392A|1951-07-24|Process and apparatus for treating solutions to recover and coat solid particles
    Hovmand1995|Fluidized bed drying
    US2351091A|1944-06-13|Apparatus for treating solids in fluids
    EP0125516B1|1986-08-27|Granulating apparatus
    CN100443509C|2008-12-17|Chlorinated polyethylene drying process
    US5647142A|1997-07-15|Apparatus and process for drying a moist material dispersed or dispersible in a stream of drying gas
    US4057908A|1977-11-15|Method and apparatus for drying damp powder
    US2561393A|1951-07-24|Process and apparatus for vaporizing solutions and recovering solids therefrom
    US2494153A|1950-01-10|Drying and pulverizing method and apparatus
    US3795058A|1974-03-05|Grid for fluidized bed apparatus
    US3265775A|1966-08-09|Continuous treatment of subdivided material with gas
    US4489504A|1984-12-25|Steam granulation apparatus and method
    US2330545A|1943-09-28|Desiccating apparatus
    US3385724A|1968-05-28|Process and device for continuously treating powdered materials with stabilizing subsances
    US3618227A|1971-11-09|Particle drying apparatus
    US3596699A|1971-08-03|Apparatus for spray drying milk and the like
    ES397071A1|1975-03-01|Process and apparatus for continuous treatment of dusty, powdery and granular materials
    US2703139A|1955-03-01|Method and apparatus for the complete dehydration of molasses
    US3275063A|1966-09-27|Apparatus and method for gas contact spray drying
    US3251291A|1966-05-17|Agglomerating apparatus for powdered food solids or the like
    US2658615A|1953-11-10|Separator drying method and apparatus for moisture carrying material
    US2783544A|1957-03-05|Process and apparatus for the drying of damp material in current driers
    US3383774A|1968-05-21|Apparatus and method for treating pulverulent or granular material
    US2847766A|1958-08-19|Drier
    同族专利:
    公开号 | 公开日
    GB1350098A|1974-04-18|
    IT989052B|1975-05-20|
    DE2125945C3|1979-10-31|
    NL7107488A|1971-08-25|
    CH534531A|1973-03-15|
    ATA466271A|1975-08-15|
    NL150347B|1976-08-16|
    JPS4924943B1|1974-06-26|
    CA946730A|1974-05-07|
    FR2083223A5|1971-12-10|
    SE389029B|1976-10-25|
    DE2125945A1|1971-12-16|
    DE2125945B2|1979-03-15|
    US3735792A|1973-05-29|
    AT329521B|1976-05-10|
    引用文献:
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    US2054441A|1932-01-29|1936-09-15|Western Condensing Co|Method and apparatus for drying liquid containing materials|
    US2184314A|1933-04-12|1939-12-26|Golden State Company Ltd|Desiccating method|
    US2316207A|1941-04-08|1943-04-13|Atlantic Res Associates Inc|Method and apparatus for rapidly drying casein curd and like substances|
    US2357648A|1941-07-02|1944-09-05|Drying & Concentrating Company|System of dehydrating liquid products|
    US2561394A|1946-03-16|1951-07-24|Donald E Marshall|Method of coating particulate materials|
    US2635684A|1949-05-24|1953-04-21|Ici Ltd|Manufacture of caustic soda granules|
    US3036338A|1959-01-08|1962-05-29|G & A Lab Inc|Coating and pelletizing of fusible materials|
    US3233413A|1963-06-21|1966-02-08|Gen Electric|Control system|
    US3309262A|1963-12-03|1967-03-14|Container Corp|Fluidized bed oxidation of waste liquors resulting from the digestion of cellulosic materials for paper making|
    GB1052156A|1964-05-04|
    US3415665A|1965-12-06|1968-12-10|Uta Patentverwaltungsgesellsch|Proces of dehydrating food and heat-sensitive products|US3849233A|1970-06-17|1974-11-19|M Lykov|Method of production of granulated product|
    DE2349211C3|1973-10-01|1979-06-21|Metallgesellschaft Ag, 6000 Frankfurt|Process for drying and simultaneous agglomeration of metal salts|
    DE2602454C3|1976-01-23|1988-09-29|Luco-Spruehmisch-Technic Gmbh, 6474 Ortenberg, De|
    JPS5857536B2|1977-03-14|1983-12-20|Central Glass Co Ltd|
    US4323312A|1977-08-26|1982-04-06|Werner Glatt|Fluidized bed apparatus|
    DD140078A1|1978-11-21|1980-02-06|Horst Bergmann|GRANULAR DRYING PROCESSES OF BIOMASSES AND ELECTRODE|
    DE3132289C2|1981-08-14|1986-08-28|Minskij naučno-issledovatel'skij Institut Stroitel'nych Materialov, Minsk|Method and device for the production of granules from a suspension|
    DE3301872A1|1983-01-21|1984-07-26|Henkel KGaA, 4000 Düsseldorf|SPRAY DRYER AND METHOD FOR OPERATING THE DRYER|
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    US5092960A|1989-11-22|1992-03-03|Brown Robert E|Method for drying suspensions of organic solids in water|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP45047026A|JPS4924943B1|1970-06-01|1970-06-01|
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