• 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:
    1428680 Calcining cement raw materials; preheaters F L SMIDTH & CO AS 25 Oct 1973 [11 Dec 1972] 57071/72 Heading F4B In a method of carrying out at least partial calcination of a preheated pulverous raw material consisting of or containing lime, e.g. cement raw meal, the raw material is intimately mixed with a combustible gas or a fuel which in contact with the hot material will produce a combustible gas, the suspension of gas/material so formed being brought into contact with a flow of oxygen-containing gas so that the combustible gas burns and the raw material is calcined isothermically, the treated particles being first entrained in the gases produced and then separated therefrom. As shown Fig. 1 the preheated raw material passes from a cyclone hopper 5 to a V-shaped chamber 2 supplied through branched pipes 7 and 8 with combustible gas or oil and air respectively, the material being fluidized and carried upwardly through a branch 10 to be entrained by an air stream ascending a square sectioned shaft 1. Combustion and calcination take place as the streams wire and treated material is carried off to a separator. In a modification (Figs. 3-5) the chamber 2 is box-like with an opening into the shaft and is supplied with powdered coal. Another modification (Figs. 6 and 7) has shaft (17) of circular cross-section which extends partly into a widened section (15) defining a combustion/calcination chamber defining therewith an annular section (9) above which are discharge pipes from two or more hoppers (5). The single shaft (17) may be replaced by three shafts (Fig. 8). A further modification, Fig. 9, has a similar widened section 15 into which shoots 4 feed material from hoppers 5, one having valved pipes 7 for fuel oil or gas and the other a screw conveyer 14 for powdered coal. A modification of this (Fig. 10) has V-shaped shoots 4 and in another (Fig. 11) the delivery branch (48) of a shoot (4) extends upwardly and centrally of the shaft (17). Yet another modification (Figs. 13-14) has a telescopically retractable top (20) to the shaft (17) around which a fluidized bed is maintained and which incorporates a lower receiver for material in the chamber (15) in case of stoppage. The chamber 2 is shown applied to cement burning plant Fig. 15, incorporating a rotary furnace 30, a grate clinker cooler 33 which supplies hot air for the shaft 1, a conventional suspension preheater of the cyclone type 5, 28, 39, an exhaust fan 41 and an electrostatic precipitator 42. Hot gases from the furnace hood 31 travel by line 8 to the chamber 2, by line 50 to a gas riser 37 and by line 51 through a cooling tower 52 to the inlet side of the fan 41.
    公开号:SU1085516A3
    申请号:SU752139256
    申请日:1975-06-02
    公开日:1984-04-07
    发明作者:Тоуборг Ерн
    申请人:Ф.Л.Смидт Унд Ко,А/С (Фирма)；
    IPC主号:
    专利说明:

    2. Installation according to claim 1, characterized in that the mixing chamber is located adjacent to the lower part of the calcination chamber, the pipeline for supplying fuel is located in the bottom, and the pipeline for feeding raw materials is in the arch of the mixing chamber,
    3. Installation according to claim 1, characterized in that the mixing chamber is located in the lower part of the calcination chamber and is made of two sections, between which the pipeline for supplying oxygen-containing gas is placed, the pipeline for supplying fuel is located in the bottom of each section, and the pipeline for the supply of raw materials - in the side walls of the chamber of calcification.
    4. The installation according to claim 1, wherein the mixing chamber is made in the form of a pipe entering from both sides into the lower part of the calcination chamber, in the bottom of which there is a pipeline for supplying oxygen-containing gas.
    5. The installation according to claim 1, wherein the mixing chamber is made in the form of a pipe located in the bottom of the calcination chamber and surrounded by a pipeline for supplying oxygen-containing gas, made in the form of a tangential nozzle.
    6. The installation according to claims 3 and 4, so that the pipeline for supplying oxygen-containing gas is adapted to be moved in height.
    The invention relates to the building materials industry, in particular to a plant for calcining powdered lime-containing material, for example, a cement raw mixture. The heat required for converting a cement raw mixture into cement clinker is usually obtained by burning fuel, which is fed into the combustion chamber together with the combustion air. where flue gases are generated. Heat is mainly used for preheating and firing the feed mixture. A known unit for burning cement raw mix containing cyclone preheaters, a calcination chamber to which fuel mixed with pulverized raw material is fed, and air from a refrigerator, a rotary kiln connected by a gas duct to a calcination chamber and preheaters. A disadvantage of the known apparatus is that the partial calcination in the calcination chamber is performed at high temperature of the exhaust gases, which can lead to overheating of the initial mixture and cause the release of alkaline vapors and the formation of a melt associated with danger lump formation. The purpose of the invention is to intensify the burning process. The goal is achieved by the fact that in a roasting plant a powder-like material, predominantly lime-containing, including a preheater, a calcination chamber, a rotary kiln, a cooler, pipelines. the adjacent mixing chamber. In this case, the mixing chamber is located adjacent to the lower part of the calcination chamber, the fuel supply pipeline is located in the bottom, and the pipeline for the feed - in the roof of the mixing chamber. In addition, the mixing chamber is located next to the lower part of the calcination chamber and is made of two sections, between which the pipeline for supplying oxygen-containing gas is placed, the pipeline for supplying fuel is located in the bottom of each section, and the pipeline for supplying raw materials is in the side walls of the calcination chamber . The displacement KciMepa is made in the form of a pipe, which enters from both sides into the lower part of the calcification chamber, in the bottom of which there is a pipeline for supplying oxygen-containing gas. The mixing chamber can also be made in the form of a pipe located in the bottom of the calcination chamber and surrounded by a pipeline for the supply of oxygen-containing gas, made in the form of a tangential nozzle. The pipeline for supplying oxygen-containing gas is adapted to be moved in height. FIG. 1 is a diagram of the plant for firing a cement raw mix in FIG. 2 — a calcification chamber with a mixing chamber j in FIG. 3 2 —D embodiment of the mixing chamber} in FIG. 4 — the 3rd embodiment of the mixing chamber; FIG. 5 is a section A-A in FIG. four; in fig. 6 4th embodiment of the mixing chamber; in fig. 7 - 5th embodiment of the mixing chamber; in fig. 8th version of the mixing chamber; in fig. 9 shows a section BB in FIG. in fig. 10 - 7th version of the mixing chamber; in fig. 11 is a b-sectional view in FIG. 10. The calcification chamber (Fig. 1) includes a shaft shaft 1 of rectangular cross section connected to a V-shaped mixing chamber 2. The mixing chamber 2 is divided into two sections, one of which through the opening 3 is connected with the interior of the shaft 1, and the other with the pipeline 4 for supplying raw material 6 from the cyclone 5 6. In the bottom of the mixing chamber 2 there are fuel supply pipes, combined into the common supply pipe 7. To enhance the effect of fluidization, there is a pipe 8 for supplying non-combustible gas, for example, atmospheric air, which is divided into a series of pipes arranged evenly above the bottom of the chamber. When fuel is supplied to the raw material, part 9 of it is put into a fluidized state, while part of the material is compacted, which prevents gas from entering the pipeline 4. Between part 9 of the material and the space where the suspension of gas and raw material is located, a transition zone is formed 10, where the material exhibits fluid properties. It flows over edge 11 and creates eddies that are carried away by gas rising in barrel 1. The contact of the gas suspension and the raw material and the stream of oxygen-containing gas is carried out along an imaginary boundary zone 12-13. FIG. 3 depicts a modified installation. Its principal difference is that the mixing chamber 2 is not divided into sections, as a result of which a sealing effect is not created. In addition to this, coal is used for firing, which is supplied by means of a screw conveyor 14. The installation shown in Figures 4 and 5 differs significantly: from previous ones. Mine shaft 1 is made with a circular cross-section. It is equipped with a calcining chamber formed by the expanded part 15 of the shaft 1. The narrow and expanded parts of the shaft 1 are connected through a conical zone 16. The oxygen-containing gas is fed through pipe 17. The source material is fed into the shaft 1 in two diametrically opposite places using cyclones. 5 through pipelines 4. A flat imaginary surface 13 is made conical. By using this setup, the finished product is made more homogeneous. Shown in FIG. 6, the installation also has a calcining chamber formed by the expanded part 15 located between the barrel 1 and the pipe 17. However, parts 15 and 17 of the St. between each other conical part 18. In this case, you do not need to use a fluidized bed. Intensive mixing of the fuel with the source material takes place in the pipes themselves for supplying the source material. Fuel is fed into each pipe. FIG. 6 on the right side, as an example, a screw conveyor 14 is shown, and, as an example, a row of valves fitted with valves for supplying fuel oil or gas. Although this structure is simpler described, it achieves an intensive mixing of the starting material with the fuel. The slurry of fuel and feedstock is continuously discharged through the lower ends of the pipes 4 downward in the direction of the flow of oxygen-containing gas, which rises up through the center of the calcining chamber. And in this case, vortex flows are created, indicated by arrows 19. The shape of the installation shown in FIG. 7 differs from the previous one in that the pipes for feeding the source material are V-shaped. The fuel is fed through the lower pipe 4 and together with the gas supplied, if necessary, through the V-shaped pipe 8 located at the lowest point, cause the source material to fluidize. In the upper part of the V-tube, a compaction effect is created. In this case, the following advantages are achieved: an especially good mixing of the material with the fuel, effective firing at low temperature, fast feed of the material through the pipe 4, and the possibility of reducing the height of the sets. Shown in FIG. 8 and 9, the shape-mixing chamber is characterized in that the pipe 4 for feeding the source material is located vertically and enters the bottom of the calcining chamber in the center, its expanded part 15. It is surrounded by the pipe 17 for supplying oxygen-containing gas. Due to the tangential arrangement of the pipe 17, a spiral-like movement of gas is created, creating the same effect as the vortex flows in previous installations. In the apparatus shown in Figures 1 and 11, an annular boiling chamber is created in the lower part of the calcination chamber, which has a triangular cross-section due to the conical shape of the lower portion 18 of the chamber and upwardly extending upset 20 of the pipe 17. This design is particularly effective: it provides an effective and rapid calcination at a constant low temperature without the addition of any non-combustible gas that promotes fluidization, using only one ring of pipes 7 for supplying fuel. The outlet part 20 is made telescopic with the possibility of lowering. Part 20 is sealed relative to the pipe 17 with the help of movable seals 21, and with respect to the calcification chamber with the help of moving seals 22. The advantage of this form is that lowering the part 20, the material may continuously flow through the edge of the exhaust part 20 into the stream of oxygen-containing gas and enter the funnel 23, which is a collecting chamber. This operation is performed during shutdown, when pieces of the source material or foreign bodies are deposited in the moving bed. The material in the funnel does not affect the supply of oxygen-containing gas, which is fed laterally to the pipe 24 located above the funnel 23. The funnel 23 enters a pipe 25 for blowing fine particles back into the calcination chamber. Leaving the EU in the funnel, the pieces or foreign bodies after cooling are retracted by opening the shutter 26. The apparatus for calcining the powder material works as follows. The upper end of the shaft 1 is connected to a horizontal pipe 27 through which the suspension of fully or partially burnt raw material is tangentially passed into a cyclone 28, in which gas and raw material are separated from each other. The starting material is fed through pipe 29 into the rotary kiln 30. which he undergoes final calcination. The end of the furnace 30 is surrounded by a casing 31. A similar casing 32 is located at the other end of the furnace and is connected to a cooler 33 equipped with a grill 34. The clinker in the cooler is cooled using air flow through pipe 35. After passing through a layer of clinker, part of the air enters the casing 32, the upper part of which is connected to the shaft shaft 1. This part of the air is used as the oxygen-containing gas in the calcination chamber. The rest of the air enters the furnace 30, where it is used as a secondary air B for burning secondary air B. A burner 36. I discharge gas from the cyclone 28 through a vertical pipe 37 which enters the cyclone 5. From the upper part of the cyclone 5 the gas 38 enters the cyclone 39, and then through pipe 40 to the fan 41, which creates a vacuum, as a result of which atmospheric air enters through pipe 35. Under the action of the fan 41, the gas enters the;) filter 42, is cleaned and goes into the atmosphere through pipe 43. Source material is fed to the feed. the first hopper 44 and through pipe 45 via valve 46 enters pipe 38, where it comes into contact with the gas flow, resulting in heating material: tc and enters cyclone 39, where it is separated from gas and through pipe 47 through valve 48 enters the vertical pipe 37, and from there the cyclone 5. In the cyclone 5, gas and material are separated from each other, after which jra3 rises through pipe 38 and the material through pipe 4 goes to mixing chamber 2, where it is processed in a similar way. The gases leaving the furnace 30 can be recycled. If additional fluidization of the source material is required, part of the waste gases can be used for this purpose, as shown by the dotted line 49, the remainder of the gases can be fed through line 50 to the vertical pipe 37 of the lower cyclone, or through line 51 to pass gases through the tower cooler 52 along the pipe 40 through the electrostatic precipitator 42. In addition, in FIG. 1, a dashed line 53 shows that a portion of the starting material can be supplied to the lower part of the shaft 1, so that this part, together with the oxygen-containing gas, moves upwards along the shaft 1 "The advantage of the proposed installation compared to the known one is that roasting and preliminary the material is heated not with the use of combustible gases of the rotary kiln, but with the use of heated atmospheric air and fuel which is mixed with the source material, as a result of which the starting material is not heated material and slag formation, which leads to the smearing of gas paths and an increase in aerodynamic drag.
    FIG.
    17
    I
    权利要求:
    Claims (6)
    [1]
    (.57) 1. INSTALLATION FOR FIRING POWDERED MATERIAL, mainly lime-containing, including a heater, a calcination chamber, a rotary kiln, a cooler, pipelines for supplying raw materials, fuel and oxygen-containing gas, characterized in that, in order to intensify the firing process, the calcination chamber is connected with a cooler and made in the form of a mine shaft with a mixing chamber attached to it.
    "M
    [2]
    2. Installation according to claim 1, characterized in that the mixing chamber is located next to the lower part of the calcination chamber, and the pipeline for supplying fuel is located in the bottom, and the pipeline for supplying raw materials is in the arch of the mixing chamber.
    [3]
    3. Installation according to claim 1, characterized in that the mixing chamber is located in the lower part of the calcination chamber and is made of two sections, between which there is a pipeline for supplying oxygen-containing gas, and a pipeline for supplying fuel is located in the bottom of each section, and a pipeline for supplying raw materials - in the side walls of the calcination chamber.
    [4]
    4. Installation according to claim 1, characterized in that the mixing chamber is made in the form of a pipe entering from both sides into the lower part of the calcination chamber, in the bottom of which there is a pipeline for supplying oxygen-containing gas.
    [5]
    5. Installation according to claim 1, characterized in that the mixing chamber is made in the form of a pipe located in the bottom of the calcination chamber and surrounded by a pipe for supplying oxygen-containing gas, made in the form of a tangential pipe.
    [6]
    6. Installation according to paragraphs. 3 and 4, characterized in that the pipe for supplying oxygen-containing gas is made with the possibility of movement in height.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1085516A3|1984-04-07|Apparatus for roasting pulverulent material
    US4025295A|1977-05-24|Method of burning pulverous raw material and rotary kiln plant therefor
    GB1423875A|1976-02-04|Process and apparatus for calcination of cement raw materials to provide clinkers
    US3940236A|1976-02-24|Methods and apparatus for the heat treatment of fine-grained materials
    SU668589A3|1979-06-15|Method and apparatus for obtaining cement clinker
    CS241451B2|1986-03-13|Method of powder preheated raw material's partial calcination and equipment for performance of this method
    CA1082423A|1980-07-29|Continuous calciner
    US5454714A|1995-10-03|Equipment for and method of precalcining any mineral materials whatsoever
    US4353750A|1982-10-12|Method of firing carbonate-containing minerals
    US4477251A|1984-10-16|Process and apparatus for calcining pulverulent material
    US4035139A|1977-07-12|Method of heat treating fine granular material
    US4059392A|1977-11-22|Calcination of pulverous material
    US2757921A|1956-08-07|Method for burning of materials with heat recovery
    US4462794A|1984-07-31|Method of operating a rotary calciner retrofitted to coal-firing
    US4059393A|1977-11-22|Apparatus for calcining powder materials
    US3603569A|1971-09-07|Kiln preheat and drying section
    US4508667A|1985-04-02|Manufacture of highly porous refractory material
    RU2723793C1|2020-06-17|Method for burning fine-dispersed carbonate materials
    CA1165112A|1984-04-10|Method and apparatus for thermally treatingpulverulent materials
    US4105460A|1978-08-08|Process for the endothermic calcination of raw material
    SU440543A1|1974-08-25|Shaft furnace fluidized bed
    US1819739A|1931-08-18|Manufacture of cement and the like
    US4420303A|1983-12-13|Method and apparatus for thermally treating pulverulent materials
    RU1805273C|1993-03-30|Lime producing installation
    SU482609A1|1975-08-30|Cement Raw Material Burner
    同族专利:
    公开号 | 公开日
    SU617003A3|1978-07-25|
    ES421314A1|1976-07-16|
    IE38635B1|1978-04-26|
    GB1428680A|1976-03-17|
    DD110693A5|1975-01-12|
    US3955995A|1976-05-11|
    DK139844B|1979-04-30|
    SE395879B|1977-08-29|
    PL91293B1|1977-02-28|
    IT1000278B|1976-03-30|
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    FR2209731A1|1974-07-05|
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    MY7700109A|1977-12-31|
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    FR2209731B1|1977-06-10|
    CH592586A5|1977-10-31|
    FI60857C|1982-04-13|
    IE38635L|1974-06-11|
    YU321373A|1982-02-28|
    CS241453B2|1986-03-13|
    DE2361427C3|1984-09-06|
    JPS5710052B2|1982-02-24|
    DE2361427A1|1974-06-27|
    CA995260A|1976-08-17|
    BE808451A|1974-06-10|
    HU170074B|1977-03-28|
    CS856373A2|1985-08-15|
    DK139844C|1979-10-01|
    YU10380A|1983-12-31|
    BR7309713D0|1974-09-05|
    AU6307473A|1975-06-05|
    DE2361427B2|1981-04-09|
    NL7316968A|1974-06-13|
    FI60857B|1981-12-31|
    NO136381B|1977-05-16|
    AT366656B|1982-04-26|
    NO136381C|1977-08-24|
    ZA738677B|1975-06-25|
    AR202910A1|1975-07-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EA010170B1|2002-12-23|2008-06-30|Оутокумпу Текнолоджи Ой|Method and plant for the conveyance of fine-grained solids|
    EA010276B1|2002-12-23|2008-08-29|Оутокумпу Текнолоджи Ой|Method and apparatus for heat treatment in a fluidized bed|
    EA010278B1|2002-12-23|2008-08-29|Оутокумпу Текнолоджи Ой|Method and plant for removing gaseous pollutants from exhaust gases|
    EA010481B1|2002-12-23|2008-10-30|Оутокумпу Текнолоджи Ой|Methods and apparatus for heat treatment in a fluidised bed|
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    DE2712238C2|1977-03-21|1988-05-05|Klöckner-Humboldt-Deutz AG, 5000 Köln|Method and device for the multi-stage burning of cement clinker|
    DE2801161B2|1978-01-12|1981-06-25|Babcock Krauss-Maffei Industrieanlagen GmbH, 8000 München|Process and burning of sintered goods made from carbonate raw materials such as cement clinker|
    NO791174L|1978-04-20|1979-10-23|Smidth & Co As F L|PROCEDURE FOR MANUFACTURE OF WATERLESS ALUMINUM OXIDES|
    DE2833774C2|1978-08-02|1984-08-16|Klöckner-Humboldt-Deutz AG, 5000 Köln|Distillation plant for the production of mineral fuel products, such as cement clinker from raw meal|
    US4419964A|1979-10-26|1983-12-13|F. L. Smidth & Co.|Combustion plant|
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    US4600438A|1983-03-09|1986-07-15|Texas Industries, Inc.|Co-production of cementitious products|
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    ZA905884B|1989-08-09|1991-08-28|Cra Services|Heating and treatment of particulate material|
    DE4208977C1|1992-03-20|1993-07-15|Metallgesellschaft Ag, 6000 Frankfurt, De|
    US5413635A|1993-12-30|1995-05-09|Fuller Company|Lime sludge treatment process|
    US6488765B1|1997-07-30|2002-12-03|Cemex, Inc.|Oxygen enrichment of cement kiln system combustion|
    US6309210B1|1999-03-16|2001-10-30|L'air Liquide, Societe Anonyme Pour L'etude Et, L'exploitation Des Procedes Georges Claude|Kiln universal oxygen enrichment|
    DE10155407B4|2001-11-10|2010-02-18|Khd Humboldt Wedag Gmbh|Method and apparatus for introducing solid, flyable fuel into the calciner of a cement production line|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    GB5707172A|GB1428680A|1972-12-11|1972-12-11|Calcination of pulverous material|
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