• 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 method is disclosed for operating a cement kiln plant in which impurities in the form of alkalis are present in vapor form in the hot dust laden gases generated in the kiln. According to the method, a portion of the hot dust laden kiln gases are directed upwardly through a first riser pipe which communicates with the kiln exit gas opening and thereafter the dust particles are separated from the gases and directed to the bottom portion of a second riser pipe having its lower end open to the atmosphere. Relatively cold atmospheric air is directed upwardly through the second riser pipe so as to contact the kiln dust particles separated from the by-passed kiln gases of the first riser pipe thus permitting the kiln dust particles to be cooled by the cold air while causing the air to be heated and providing its further use e.g. in a preheater. The velocity of the cold air directed through the second riser pipe is preferably controlled such that the heavier of the alkali kiln dust particles are permitted to fall downwardly through the second riser pipe countercurrent to the flow of air while the lighter of the kiln dust particles are entrained in the upwardly flowing air. Ultimately the kiln gases from the first riser pipe are combined with the preheated air from the second riser pipe and the combined gases may be directed to preheaters. Thus the method permits the removal of the heavier alkali laden particles from the cement kiln system by merely removing those particles from the second riser pipe. A cement kiln plant for practicing the inventive method is also disclosed.
    公开号:SU1068019A3
    申请号:SU782663503
    申请日:1978-09-13
    公开日:1984-01-15
    发明作者:Туборг Эрн
    申请人:Ф.Л.Смидт И Ко А/С (Фирма)；
    IPC主号:
    专利说明:

    about
    00 The invention relates to the cleaning of waste gases, in particular, to devices for alkali removal of exhaust gases from a furnace produced by the plant. A device for cleaning an alkali from exhaust gases from a cement production furnace containing a first cyclone whose inlet is connected the exhaust pipe of the furnace, and the drainage pipe is connected to the pipeline for feeding the heated raw material to the furnace, and the second cyclone, the inlet pipe of which is connected to the vertical gas outlet pipe of the first cyclone, and This is equipped with a branch pipe and is connected to the lower part of a vertical flue gas pipe of the cyclone C. This device is characterized by an insufficient degree of cleaning of the gas discharge pipe and the formation of deposits in the duct. The device for cleaning from alkali is closest to the invention and the effect is achieved waste gas from a cement production kiln containing the first cyclone. the inlet log of the logging of which is connected to the gas outlet tube of the furnace f and the dust discharge pipe of which is equipped with a discharge pipe; the second cyclone, the dust discharge pipe of which is connected by a recirculation pipe to the lower end of the gas vent; introduced into the second cyclone, the dust outlet pipe of which is connected to the calipers via a pipeline to the lower end of the gas exhaust pipe of the stove vertical pipe of the cold air feed and raw materials introduced into the second a cyclone swarm, and a collection, the upper end of which is connected to the first cycpon. and the lower one - with furnace G2}. A disadvantage of the known device is the satisfactory efficiency of the process due to the low degree of purity of the cement to the formation of sediments. The purpose of the invention is to increase the cleaning efficiency of the zoo, by preventing the formation of deposits and increasing the purity of cement purity. f and its dust outlet pipe is equipped with a branch pipe, a second cyclone, dust; the outlet pipe of which is soybean, and cinnamon, a recirculation pipe with the lower end of the furnace exhaust pipe, and ikalnuyu pipe for supplying cold air, and the inlet of the second cyclone is connected to the upper end of the vertical pipe to supply the well air, and the discharge pipe of the first cyclone connects to the middle part of the vertical pipe du1 of the cold air supply. The rotary kiln 1 of the plant for the production of cement clinker is provided with a pipe 2 for supplying cement raw materials and is made open towards the chamber 3 having an opening 4 for exhausting smoke. Chamber 3 communicates with a gas outlet pipe 5, the upper end of which is connected to the inlet of the first cyclone b, the dust outlet of which is equipped with a discharge pipe 7 connected to the middle part of the vertical pipe 8 and supplying cold air connected to the atmosphere through the collector 9. The upper end is vertical the pipe 8 is connected to the inlet of the second cyclone 10, the dust outlet pipe of which is connected by a recirculation pipe 11 to the lower end of the pipe 5 located in the chamber 3 in the pipe 12 connected to the cyclone b th - disposed control valve 13 for controlling the gas flow through the cyclone &. The same function,. Regulation of the gas flow through the cyclone Ure is performed by the control valve 14 placed in the pipe 15 connected to the cyclone 10. The pipes 12 and 15 are connected to a common outlet pipe 16 through which the exhaust gases of the cyclones b and 10 are diverted to, for example, heating. cement raw materials. During operation of the plant for the production of cement clinker. waste; Furnace gases containing dust and alkali enter the chamber 3, from which part of the exhaust gases are discharged through the opening 4, and the other part of the exhaust gases is fed through the exhaust pipe 5 to zicon 6 f in which part of dust and from gases. Separable particles are fed through a vent pipe 7 to a vertical pipe 8, and gases are discharged through Tpv6y 12 and a common pipe 16. A vertical pipe 8, the lower end of which communicates with the atmosphere, takes cold air flow, which carries away lighter particles, supplied through pipeline 7, through a vertical pipe 8 E, a cyclone 10 in which particles are separated from air. The air-cooled particles are recycled to the bottom in a recirculation truboprozor 11.
    权利要求:
    Claims (1)
    [1]
    DEVICE FOR CLEANING OF ALKALINE OF EXHAUST GASES OF CEMENT FURNACE FURNACE, containing the first cyclone, the inlet pipe of which is connected to the exhaust pipe of the furnace, and its dust extraction pipe is equipped with a discharge pipe, the second cyclone, the dust extraction pipe with the bottom pipe of the furnace, and the exhaust pipe branch pipe connected to the lower pipe a pipe for supplying cold air, characterized in that, in order to improve cleaning efficiency by preventing the formation of deposits and increase the degree of purity Ota cement inlet of the second cyclone connected to the upper end of the vertical tube for feeding cold air, and the discharge duct of the first cyclone is connected to the middle part of the riser pipe for supplying cold air.
    106Θ019
    类似技术:
    公开号 | 公开日 | 专利标题
    US5451255A|1995-09-19|Method for improved manufacture of cement in long kilns
    DK152578B|1988-03-21|PROCEDURE FOR PORTLAND CEMENT MANUFACTURING
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    US4022568A|1977-05-10|Method and apparatus for heat treating pulverous raw materials
    US4099953A|1978-07-11|Installation for heating starting materials for glass melting
    US4530661A|1985-07-23|Apparatus for the calcination of fine grained material
    GB1319180A|1973-06-06|Method of and apparatus for reducing the alkali content of cement clinker
    US3235239A|1966-02-15|Method and apparatus for making cement
    GB2037962A|1980-07-16|Producing coal dust
    US3945817A|1976-03-23|Method for the collection of dust of a high zinc content during the production of reduced iron pellets
    US5375535A|1994-12-27|Method and apparatus for improved manufacture of cement in long kilns
    SU655882A1|1979-04-05|Device for roasting cement raw mix
    US4349331A|1982-09-14|Furnace installation including fuel milling and burnt product cooling and method of operating same
    US2757921A|1956-08-07|Method for burning of materials with heat recovery
    US4191586A|1980-03-04|Method and apparatus for reducing the calorific consumption of a cement producing plant
    US4288213A|1981-09-08|Method and apparatus for the heat treatment of fine-grained material
    US5122190A|1992-06-16|Method for producing a hydraulic binder
    SU665824A3|1979-05-30|Apparatus for heat treatment of loose material
    SU737753A1|1980-05-30|Unit for thermal treatment of finely disintegrated material
    US4788917A|1988-12-06|Shaft furnace bypass system
    RU2283812C1|2006-09-20|Method of thermally treating powdered aluminum hydroxide
    SU680638A3|1979-08-15|Apparatus and method for obtaining aluminium-containing loose material
    GB711096A|1954-06-23|Improvements in or relating to apparatus for drying and incinerating sewage sludge and similar materials
    SU1217786A1|1986-03-15|Method of calcining aluminium hydroxide
    SU903682A1|1982-02-07|Unit for heat treatment of fine material
    同族专利:
    公开号 | 公开日
    IE781856L|1979-03-14|
    BR7805972A|1979-05-02|
    IE47351B1|1984-02-22|
    DK404578A|1979-03-15|
    DE2838692A1|1979-03-22|
    FR2403101A1|1979-04-13|
    US4220476A|1980-09-02|
    GB2008085A|1979-05-31|
    FR2403101B1|1983-04-29|
    LU80231A1|1979-03-07|
    IT7827463D0|1978-09-08|
    GB2008085B|1982-02-10|
    JPS5453135A|1979-04-26|
    BE870448A|1979-01-02|
    CA1118595A|1982-02-23|
    IT1099476B|1985-09-18|
    NL7809375A|1979-03-16|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    RU2490314C2|2007-12-22|2013-08-20|Тиссенкрупп Уде Гмбх|Removing liquid slag and alkalis from synthesis gas|
    RU2528998C2|2008-06-02|2014-09-20|Тиссенкрупп Уде Гмбх|Modified gas and steam turbine process with integrated coal gasification under pressure|US746261A|1903-09-24|1903-12-08|Ralph Baggaley|Apparatus for removing impurities from furnace-gases.|
    US1731457A|1922-12-22|1929-10-15|Johan S Fasting|Apparatus for treating wet raw materials in the manufacture of cement|
    US1909820A|1931-03-24|1933-05-16|Edge Moor Iron Company|Cement apparatus and method of operation thereof|
    US2590090A|1946-09-16|1952-03-25|Erie Mining Co|Nodulizing process and apparatus|
    US2823910A|1952-06-20|1958-02-18|Ansaldo Sa|Cement furnace|
    US3022989A|1954-04-07|1962-02-27|Union Commerce Bank|Hydraulic cement process|
    US3151187A|1959-04-23|1964-09-29|Alsacienne Constr Meca|Fluid filtering system|
    DE1126306B|1959-10-17|1962-03-22|Kloeckner Humboldt Deutz Ag|Process for burning cement raw material that contains alkalis|
    US3116054A|1960-07-26|1963-12-31|Beteiligungs & Patentverw Gmbh|Heating arrangement|
    US3235239A|1963-12-23|1966-02-15|Smidth & Co As F L|Method and apparatus for making cement|
    US3317201A|1964-04-13|1967-05-02|Polysius Gmbh|Method of and arrangement for increasing the alkali content in alkali-laden dusts of flue gases|
    FR1586721A|1968-10-02|1970-02-27|US4276092A|1979-12-03|1981-06-30|Lafarge Consultants Ltd.|Manufacture of cement|
    US4662945A|1985-07-01|1987-05-05|Fuller Company|Process and apparatus for manufacturing low sulfur cement clinker|
    DK12893A|1993-02-04|1994-08-05|Smidth & Co As F L|Process for producing normal as well as ultrafine cement|
    US5782973A|1997-04-29|1998-07-21|Fuller Company|Cement dust recovery system|
    ES2394305T3|2002-12-11|2013-01-30|Taiheiyo Cement Corporation|Cement kiln chlorine / sulfur bypass system|
    US7141093B2|2003-08-04|2006-11-28|Graymont Qc Inc.|Hydrated lime kiln dust recirculation method for gas scrubbing|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    GB3831777|1977-09-14|
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