• 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:
    Cold, wet gypsum is admixed to a moving bed of hot solid particles of a heat-retaining material. The mixture is fed to a moving bed type drier where it is agitated while the released vapors are withdrawn. After discharge from the drier, dry gypsum is separated from the heating particles and the latter are recirculated into a heater. Preferably, flue gases from a combustion chamber are employed for heating the particles, which are preferably in the form of steel balls.
    公开号:SU1207404A3
    申请号:SU823510199
    申请日:1982-11-04
    公开日:1986-01-23
    发明作者:Петрович Владан
    申请人:Крупп-Копперс Гмбх (Фирма)；
    IPC主号:
    专利说明:

    one
    The invention relates to a drying technique, preferably for drying gypsum.
    The purpose of the invention is to improve the conditions of the process of heat and mass transfer.
    The drawing shows a device for drying cold wet gypsum with a solid heat carrier, a general view.
    The proposed device comprises a vertical cylindrical drying shaft 1 with a gypsum hopper 2 in the upper part and sections inside the shaft 1 in the form of conical funnels 3, a gypsum separator 4 from a solid heat carrier and a solid heat recovery circuit.
    Here, each funnel 3 is provided with horizontal shelves 5,. staggered funnels in chess order.
    In mine 1, wet, cold gypsum is loaded through conduit 6, and solid heat transfer medium is supplied from tank 7, where it is preheated, through a paddle-type drum gateway 8. For example, steel balls can be used as solid heat transfer fluid.
    Gypsum and solid heat carrier are continuously fed: .- into the shaft 1, where they move from top to bottom, the passage through the well-installed funnels 3, pouring from shelf 5 to the shelf and thus mixing, thus there is a uniform heat treatment of gypsum. Resistance during downward flow of gypsum is overcome due to its own weight and the weight of the solid heat carrier, and the residence time of the gypsum in the mine is determined by the removal of gypsum and solid heat carrier from the bottom of the mine through the discharge device 9.
    In the unloading device 9, the gypsum has a temperature of 120-130 ° C and humidity, and in the separator 4, the gypsum and the solid heat carrier are separated, after which the gypsum enters through the conduit 10 into the dryer 11 of the vortex layer.
    The gypsum separator 4 may be made in the form of a vibrating screen or in the form of a pneumatic separator.
    1207404.2
    The solid heat carrier separated in the separator 4 is transported by means of the transport device 12 (chain conveyor, bucket elevator and 5 tons) to the tank 7 for regeneration.
    Vapor extracted from mine 1 from wet gypsum is removed at various levels through pipelines 13, collecting pipe 14, cyclone 15, pipe 16, fan 17, pipes 18 and 19, electrostatic precipitator 20 and pipe 21 and is fed into washing device 22 circulating 15 circuit, in which, in addition to condensation, leaching of contaminants occurs.
    The gypsum particles recovered in the cyclone 15 are fed through a four-blade blade 20 th drum. The sluice gate 23 and the pipelines 24 and 10 into the dryer 11 of the vortex layer. The dust collected in the electrostatic precipitator 20 is supplied via conduit 25 to outlet conduit 26
    25 cooled to 15 ° C in the dryer 11 gypsum, through which it is sent for further use. The maintenance of the vortex layer in the dryer 11 is carried out using a cold
    30 air supplied through the duct 27 by the fan 28.
    The dusty air exhausted in the dryer 11 is discharged through conduit 29 to cyclone 30, from which enters the electrostatic precipitator 20 through conduits 31 and 19, after which via conduit 21 enters the flushing device 22 of the circulation circuit.
    The gypsum particles recovered in the cyclone 30 are fed through the cell vaned drum sluice 32 and conduit 33 to the cooled gypsum pipe 26.
    The liquid coming out of the washer 22 is fed through the conduit 34 into the receiving tank 35. The slurry deposited in the receiving reservoir 35 is discharged through the conduit 36 through the pump 37. To the wash water from the conduit 38, a partial flow of water from the conduit 39 is mixed with the pump 40 and set is needed temperature.
    35
    40
    15
    50
    The tank 7 for the regeneration of solid coolant contains a nozzle for entering the combustion products
    The tank 7 for the regeneration of solid coolant contains a nozzle for entering the combustion products
    3
    gaseous, liquid or solid fuels from the combustion chamber 41. The combustion chamber 41 is fed through the pipeline 42 by the fan 43 from the cyclone 15. The waste products recycled in the tank 7 for regeneration of the solid heat carrier are fed through the pipeline 44 by the fan 45 to the flushing device through the electrostatic filter 20. at 22.
    The cold air into the heat exchange tubes of the dryer 11 is supplied by the fan 46 through line 47, and the exhaust air (heated) through line 48 is supplied to the combustion chamber 41.
    A device for drying cold wet gypsum with a solid heat carrier works as follows.
    Cold, wet gypsum is fed through conduit 6 to shaft 1 and solid heat transfer medium is fed to shaft 1 from tank 7, where it is heated. In mine 1, the mixing of cold gypsum and the heated solid coolant takes place and the gypsum is dried by mixing the mixture through funnels 3 and shelves 5.
    The heating of the solid coolant in the tank 7 takes place by combustion products coming from the combustion chamber 41.
    Spent in the tank 7, the combustion products enter the washing device 22 through the electrostatic precipitator 20
    Editor L.Shishkin Order 8752/61
    Compiled by I.Sinitska Tehred 3.Paly
    Circulation 635 VNINPI State Committee of the USSR
    for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5
    Branch PPP Patent, Uzhgorod, st. Project, 4
    074044
    The separation of dried gypsum and solid coolant occurs in the separator 4, after which the gypsum is fed for cooling to the dryer 11 5 of the vortex layer, and the solid coolant through the transport device 12 is fed for regeneration into the container 7.
    The gypsum cooled in the dryer 11 is led through the duct 27 by the fan 28 and into the heat exchange tubes of the dryer 11 through line 47 by the fan 46. The air heated in the heat exchange tubes from the dryer 11 is fed into the combustion chamber 41.
    Exhaust in the dryer 11 cold air through the cyclone 30, the electrostatic precipitator 20 enters the flushing device 22.
    The 20 formed during the drying of gypsum in the mine 1, the evaporation through pipelines 13 enters the cyclone 15, after which it is divided into two parts, one of which enters the combustion chamber, 25 and the other through the electrostatic precipitator 20 - into the flushing device 22.
    Since for heating the solid fuel in the tank 7, the combustion products with a temperature of 1500 ° C, i.e., too high for heating the solid heat carrier, are used, a part of said vapor is mixed with the combustion products. Combustion products leaving the combustion chamber 41 have a temperature and, having passed through the container 7, leave it with a temperature of 150 ° C and enter through the electrostatic precipitator 20 into the washing device 22.
    thirty
    35
    Proofreader A.Obruchar Subscription
    权利要求:
    Claims (1)
    [1]
    DEVICE FOR DRYING COLD WET GYPSUM WITH A SOLID HEAT CARRIER, containing a vertical cylindrical drying shaft with a gypsum bin in the upper part and sections arranged in the form of conical funnels in belts, a gypsum separator from the solid heat carrier and the latter regeneration circuit, characterized in that improving the conditions of the heat and mass transfer process, each funnel is equipped with horizontal shelves installed staggered along its height.
    mzuzT'Tis
    类似技术:
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    同族专利:
    公开号 | 公开日
    US4523906A|1985-06-18|
    ZA828551B|1983-09-28|
    JPS58115049A|1983-07-08|
    AT383585B|1987-07-27|
    DE3151045A1|1983-07-28|
    DD208852A5|1984-04-11|
    ATA452182A|1986-12-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE1038885B|1953-09-09|1958-09-11|Wilhelm Lang K G|Mechanical circulation mixer for dry materials with vertically arranged mixer shaft|
    US2994523A|1957-11-18|1961-08-01|Oil Shale Corp|Calcining of gypsum|
    US3158441A|1962-03-07|1964-11-24|Joy Mfg Co|Semi-continuous material treatment process|
    AU6714265A|1965-11-26|1968-05-16|Continuous production of alpha plaster|
    SE374811B|1973-01-18|1975-03-17|Sintab Swedinventor Ab|
    US4193758A|1976-06-14|1980-03-18|Food Processes, Inc.|Granular bed heating method|
    US4052149A|1976-09-02|1977-10-04|National Gypsum Company|Continuous calciner|US4935211A|1989-01-23|1990-06-19|Azar David G|Fluorogypsum waste solidification material|
    US5262252A|1991-10-09|1993-11-16|Globe-Union Inc.|Welded pressure vessel for a metal oxide-hydrogen battery utilizing a flexible weld ring|
    DE10323774A1|2003-05-26|2004-12-16|Khd Humboldt Wedag Ag|Process and plant for the thermal drying of a wet ground cement raw meal|
    DE102013219684A1|2013-09-30|2015-04-02|Krones Ag|Apparatus for heating plastic bricks|
    FR3052545B1|2016-06-09|2018-06-15|Haffner Energy|DRYING DEVICE|
    CN110887370A|2019-11-07|2020-03-17|湖南工业大学|Blending type wood powder drying device and process thereof|
    CN111689707B|2020-05-08|2021-07-30|北新集团建材股份有限公司|Calcining device|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19813151045|DE3151045A1|1981-12-23|1981-12-23|METHOD AND DEVICE FOR DRYING PLASTER.|
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