• 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:
    In a method and apparatus for calcining calcium sulphate dihydrate or like heat sensitive material, in which a bed of the material is heated in a vessel (41) by the direct introduction of a hot gas through a tube (21) extending downwardly into the bed, the proportion of insoluble anhydrite (II) in the product is reduced by lowering the temperature of the hot gas before it contacts the material of the bed. This is done by indirect heat exchange through the wall of the tube with a relatively cool substance, for example, powdered gypsum or recycled exhaust gases, in an outer tube (26). The cooling material in the outer tube contacts the material in the bed before the latter is contacted by the hot gas.
    公开号:SU1621809A3
    申请号:SU874028873
    申请日:1987-01-07
    公开日:1991-01-15
    发明作者:Джон Болл Дэвид；Варни Эдвард
    申请人:Бпб Индастриз Паблик Лимитед Компани (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to apparatus for calcining gypsum.
    The purpose of the invention is to reduce the amount of insoluble anhydrite for f $ by reducing the temperature of the hot gas.
    In FIG. 1 schematically shows a device, a vertical section; in FIG. 2 - modification of the device, | Q
    The device comprises a steel tank 1, surrounded by a chamber 2, to which heat is supplied from the burner 3. A rotating mixer 4 can be installed in the tank 1 and in the pipe direction in the transverse 15 relative to the mixer or gas channels through which hot gases are supplied to the tank 1. The tank 1 is closed by a cover 5 with a hole 6, through which a gas outlet occurs. In the cover 5, a loading hole 7 is made, through which the calcined material is loaded. Through the output channel 8, located in the lower 25 part of the tank 1, the calcined material is discharged in discrete mode. The outlet 9, located in the upper part of the tank 1 at the level of the upper surface 39 of the calcined material layer and protected by a reflective baffle 10, allows continuous operation.
    The tank 1 is equipped with a heating pipe 11 mounted vertically and having one or more holes in the end portion 12 from below. Hot • gases, which can be used as hot gaseous products of combustion, either come to the upper end of the pipe from an external source, or are formed under the influence of burner 13. When using burner 13, fuel is supplied via pipe 14 to water 14, and air - through the pipe 15. Hot gas introduced into the layer of calcined material through the pipe 11 provides an additional supply of heat to the layer of calcined material in addition to the heat entering through the walls of the tank 1.
    The upper part of the pipe 11 is enclosed in a shell 16, the lower part of which is located below the level of the upper surface 17 of the calcined material layer and much higher than the hole 12. The shell 16 passes through the lid 5 of the tank and can be equipped with pipes 18 and 19 for supplying solid and gaseous to the shell substances respectively. The gas outlet 6 is connected to a dust separator 20, which, in turn, is connected via a pipe 21 to an exhaust gas exhaust device and through a fan 22 with a nozzle 19. The collected dust is collected in the lower part 23 of the separator 20 and can be reused by feed through the pipe 18.
    The reservoir 1 shown in FIG. 2 has a section 24 in the form of an inverted truncated cone. The upper cylindrical section 25 has a cover 26. A hole 27 located in the lower part of the tank 1 is connected to an overflow hole 28, which determines the level 17 of the layer of calcined substance. The pipe 11 for supplying hot gases reaches almost to the bottom of the tank. A cone 29 is included in the end hole 12 of the pipe 11, which serves to improve the distribution of gases exiting the hole 12. The pipe 11 may have slits 30 along the side walls, providing an additional improvement in the distribution of gases inside the calcined substance. To fix the pipe 16 from moving inside the tank 1, springs 31 are provided.
    The device operates as follows.
    Through the hole 7, the material to be calcined is loaded. Heating of the material is carried out either with the help of the exhaust gases entering through the pipe 21 through the fan 22 into the pipe 19, or by using cold mineral or trapped dust entering the pipe 18. The crushed gypsum introduced into the shell 16 may partially or completely consist of calcination of calcium sulfate dehydrate. Calcium sulphate or recycle gases, passing down the shell 16 before getting into the layer of the calcined material, are heated. At the same time, there is a decrease in the temperature of the hot gas passing through the inner pipe 11 before it enters the calcined material layer, which helps to reduce the amount of insoluble anhydrite.
    The implementation of this invention does not reduce the thermal efficiency of the calcination process. Due to the fact that the shell passes only along part of the length of the pipe through which hot gas is supplied to the layer of the calcined substance the substance passing through the shell is not affected by a large pressure in the opposite direction, due to the fact that heating gas enters from the lower end of the inner pipe. As a result, a small amount of energy is required for calcination.
    权利要求:
    Claims (4)
    [1]
    Claim
    1. A device for calcining gypsum containing a body, a pipe for supplying hot gas with holes in its lower part, characterized in that, in order to reduce the amount of insoluble anhydrite by reducing the temperature of the hot gas, the pipe for supplying the latter is enclosed in a non-reach to its end
    5 casing with nozzles for supplying a cooling medium in the upper part.
    [2]
    2. The device according to claim 1, characterized in that it is equipped with a dust separator * connected by a pipe to a pipe for supplying a cooling medium to the shell.
    [3]
    3. The device according to p. 1, about t l and -
    15 characterized in that the dust separator is connected by a piping with a pipe for supplying a cooling medium to the shell.
    [4]
    4. The device according to π. 1, about l and 20, characterized in that the pipe for supplying hot gas is equipped with a burner located at the level of the housing cover.
    FIG. 2
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1621809A3|1991-01-15|Device for calcining gypsum
    SU1232136A3|1986-05-15|Device for boiling gypsum
    KR960005759B1|1996-05-01|Fluidized bed reactor
    GB1456096A|1976-11-17|Furnace for the disposal of halogenated organic materials
    US4176157A|1979-11-27|Calcining calcium sulphate dihydrate
    US4455285A|1984-06-19|Heat treatment of material
    US4932862A|1990-06-12|Suspended gas reactor
    CA1044014A|1978-12-12|Calcining calcium sulphate dihydrate
    US3892190A|1975-07-01|Thermal oxidation of wastes and apparatus therefor
    GB2086874A|1982-05-19|Calcining calcium sulphate dihydrate
    US2046500A|1936-07-07|Method for treating gases
    CA1167641A|1984-05-22|Calcining calcium sulphate dihydrate
    GB2140702A|1984-12-05|Fluidised bed calcination
    CA1296709C|1992-03-03|Heat exchanger
    US4722768A|1988-02-02|Device for carrying out gas/solid reactions
    SU976270A1|1982-11-23|Furnace for heat treatment of loose material
    US4467731A|1984-08-28|Steam injection system for an incinerator
    SU861395A1|1981-09-07|Gas generator thermal treatment of lumped fuel
    SU1533748A1|1990-01-07|Apparatus for hydrothermal treatment
    SU1031956A1|1983-07-30|Apparatus for hydrophobization of granular materials
    SU1544474A1|1990-02-23|Installation for preparing bitumen from road tar
    SU767170A1|1980-09-30|Vertical furnace for thermal treatment of carbon materials
    SU1164518A1|1985-06-30|Fluidized bed apparatus
    SU1252632A1|1986-08-23|Combination drier
    SU1000094A1|1983-02-28|Gas liquid reactor
    同族专利:
    公开号 | 公开日
    DK165176C|1993-03-08|
    GB8600275D0|1986-02-12|
    GB2185419A|1987-07-22|
    AU587664B2|1989-08-24|
    DK631986D0|1986-12-29|
    NO171589C|1993-04-07|
    IN169196B|1991-09-14|
    US5011668A|1991-04-30|
    NO171589B|1992-12-28|
    PL263576A1|1988-01-21|
    ES2016266B3|1990-11-01|
    FI81334C|1990-10-10|
    UA6320A1|1994-12-29|
    KR900000623B1|1990-02-01|
    AR240899A1|1991-03-27|
    EP0230793B1|1990-07-25|
    KR870007080A|1987-08-14|
    AR240899A2|1991-03-27|
    EP0230793A2|1987-08-05|
    PL154136B1|1991-07-31|
    LV5613A3|1994-05-10|
    JPS62216632A|1987-09-24|
    BR8700039A|1987-12-01|
    DK631986A|1987-07-08|
    EG18120A|1992-08-30|
    JP2571374B2|1997-01-16|
    EP0230793A3|1988-03-23|
    NZ218611A|1990-02-26|
    NO865290D0|1986-12-23|
    FI81334B|1990-06-29|
    AT54906T|1990-08-15|
    DK165176B|1992-10-19|
    DE3672994D1|1990-08-30|
    FI870025A0|1987-01-05|
    NO865290L|1987-07-08|
    AU6635086A|1987-07-09|
    ZA869658B|1987-08-26|
    CA1313747C|1993-02-23|
    GB2185419B|1990-04-18|
    GR3000828T3|1991-11-15|
    FI870025A|1987-07-08|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CN110734237A|2019-12-10|2020-01-31|郑州三迪建筑科技有限公司|gesso calcining equipment|US2647738A|1950-12-08|1953-08-04|Shell Dev|Heating powdered material|
    AU408397B1|1966-02-02|1970-12-01|Christmas Island Phosphate Commission|Heating of discrete material|
    US4176157A|1974-11-14|1979-11-27|Bpb Industries Limited|Calcining calcium sulphate dihydrate|
    JPS556580B2|1976-08-09|1980-02-18|
    JPS551808A|1978-06-10|1980-01-09|Miura Eng Internatl Kk|Dissolving method for oxygen in water|
    ZA793953B|1978-08-08|1980-08-27|Coal Industry Patents Ltd|Heat treatment of material|
    NL185896C|1979-01-08|1990-08-16|Bpb Industries Ltd|DEVICE FOR HEAT TREATMENT OF A GRANULAR MATERIAL.|
    US4238238A|1979-08-15|1980-12-09|United States Gypsum Company|Calcining kettle having means for returning stack exhaust gas to calcining mixture|
    JPS5745610A|1980-09-01|1982-03-15|Yaskawa Electric Mfg Co Ltd|Portable program loader using simple display method|
    GB2140702A|1980-11-10|1984-12-05|Bpb Industries Plc|Fluidised bed calcination|
    JPS5937929B2|1981-08-07|1984-09-12|Kyoichi Fujii|
    US4626199A|1985-04-25|1986-12-02|United States Gypsum Company|Submerged combustion calcination|GB8625964D0|1986-10-30|1986-12-03|Bpb Industries Plc|Calcination apparatus|
    DE3818992A1|1988-06-03|1989-12-14|Rigips Gmbh|METHOD FOR PRODUCING A PLASTER PLASTIC MADE OF REA-GIPS, SUITABLE FOR THE PRODUCTION OF PLASTERBOARD BOARDS|
    US4948362A|1988-11-14|1990-08-14|Georgia Kaolin Company, Inc.|Energy conserving process for calcining clay|
    US5139749A|1990-06-22|1992-08-18|Tas, Inc.|Fluidized calcining process|
    GB9310891D0|1993-05-26|1993-07-14|Tran Ind Res Inc|Utilization of deinking sludge in building materials|
    GB9317849D0|1993-08-27|1993-10-13|Bpb Industries Plc|Improvements in calcination|
    US5743954A|1995-02-02|1998-04-28|United States Gypsum Company|Method for continuous refractoryless calcining of gypsum|
    US5743728A|1995-08-15|1998-04-28|Usg Corporation|Method and system for multi-stage calcining of gypsum to produce an anhydrite product|
    FR2836913B1|2002-03-08|2006-11-24|Lafarge Platres|DEVICE FOR DRYING AND / OR COOKING GYPSUM|
    US20050083173A1|2003-10-20|2005-04-21|Konupek Ingrid H.|Locking remote control|
    US7434980B2|2004-02-27|2008-10-14|United States Gypsum Company|Swinging agitator for a gypsum calcining apparatus and the like|
    US7175426B2|2004-02-27|2007-02-13|United States Gypsum Company|High efficiency refractoryless kettle|
    JP2006321663A|2005-05-17|2006-11-30|Tadano Ltd|Apparatus for manufacturing gypsum hemi-hydrate and method of continuously manufacturing gypsum hemi-hydrate|
    US8388926B2|2006-01-13|2013-03-05|Certainteed Gypsum, Inc.|System and method for the production of gypsum using heat recovery|
    WO2007084346A2|2006-01-13|2007-07-26|Certainteed Gypsum, Inc.|System and method for the production of alpha type gypsum using heat recovery|
    CN103964714B|2014-04-25|2016-04-13|华北理工大学|A kind of method utilizing calcium sulfite type desulphurization gypsum to prepare high-performance gypsum based composite cementing material|
    RU2585601C1|2015-02-13|2016-05-27|Федеральное Государственное Автономное Образовательное Учреждение Высшего Профессионального Образования "Сибирский Федеральный Университет"|Current lead of baked anode of aluminium electrolysis cell|
    RU2584813C1|2015-02-19|2016-05-20|Павел Николаевич Манташьян|Installation for dehydration of gypsum|
    CN107406319B|2015-02-25|2020-06-12|吉野石膏株式会社|Gypsum calcining device and gypsum calcining method|
    PL3498680T3|2016-08-10|2021-06-14|Yoshino Gypsum Co., Ltd.|Apparatus and method for treating gypsum|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    GB8600275A|GB2185419B|1986-01-07|1986-01-07|Improvements in calcination apparatus|LV931199A| LV5613A3|1986-01-07|1993-11-11|Plastered for plaster casting|
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