CN102219409A - Calcining process and equipment for preheating and pre-decomposing cement clinker in high-solid-gas ratio - Google Patents

Calcining process and equipment for preheating and pre-decomposing cement clinker in high-solid-gas ratio Download PDF

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CN102219409A
CN102219409A CN201110070270.6A CN201110070270A CN102219409A CN 102219409 A CN102219409 A CN 102219409A CN 201110070270 A CN201110070270 A CN 201110070270A CN 102219409 A CN102219409 A CN 102219409A
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gas ratio
high solid
heat exchanger
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徐德龙
陈延信
李辉
程福安
王士军
嵇鹰
李兆锋
刘宁昌
陈惠霞
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Shaanxi Delong Cement High Tech Incubator Co ltd
Xian University of Architecture and Technology
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Shaanxi Delong Cement High Tech Incubator Co ltd
Xian University of Architecture and Technology
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Priority to CN201110070270.6A priority Critical patent/CN102219409A/en
Publication of CN102219409A publication Critical patent/CN102219409A/en
Priority to PCT/CN2012/072821 priority patent/WO2012126387A1/en
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
    • C04B7/44—Burning; Melting
    • C04B7/4476—Selection of the kiln atmosphere
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
    • F27B7/2016—Arrangements of preheating devices for the charge
    • F27B7/2041—Arrangements of preheating devices for the charge consisting of at least two strings of cyclones with two different admissions of raw material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/10—Arrangements for using waste heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/20—Arrangements for treatment or cleaning of waste gases

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Furnace Details (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention relates to a calcining process for preheating and pre-decomposing cement clinker in high solid-gas ratio. The process comprises the following steps of: firstly carrying out heat exchange between cement raw materials and hot flue gas in a high-solid-gas-ratio preheater during cement clinker calcining process, then introducing into an external circulating type high-solid-gas-ratio decomposition furnace for decomposing carbonates in the cement raw materials, introducing the decomposed materials into a rotary kiln for calcination, and finally introducing the fully calcined materials into a cooling machine for cooling. According to the invention, a high-solid-gas-ratio cross-flow heat-treatment device is utilized to preheat raw materials and simultaneously recover heat enthalpy from waste flue gas efficiently; and the external circulating type high-solid-gas-ratio decomposition furnace is employed to completely decompose the preheated cement raw materials in a suspension form, thus effectively reducing the temperature of exhaust gas discharged by the system and the heat consumption of unit cement clinker, improving the thermal efficiency of the system, apparent decomposition rate of materials in the kiln, the unit volume production of the decomposition furnace and unit volume production of the rotary kiln, enhancing the thermal stability of the decomposition furnace, and simultaneously reducing the discharge of SO2, NOx and other harmful gases.

Description

高固气比预热预分解水泥熟料煅烧工艺及设备High solid-gas ratio preheating pre-decomposition cement clinker calcination process and equipment

技术领域technical field

本发明属于水泥产业领域，涉及一种水泥生产方法和装置，具体涉及一种高固气比预热预分解水泥熟料煅烧工艺及设备。The invention belongs to the field of cement industry, and relates to a cement production method and device, in particular to a high solid-gas ratio preheating and pre-decomposing cement clinker calcination process and equipment.

背景技术Background technique

二十世纪八十年代以来，新型干法水泥生产工艺迅速推广，逐步成为主流生产工艺。水泥熟料热耗降至3100kJ/kg熟料，水泥熟料烧成系统的热效率提高到45％左右。但是该系统排出的废气温度仍然高达310～370℃，回转窑的单位容积产量＜5t/m3.d。Since the 1980s, the new dry process cement production process has been rapidly promoted and gradually become the mainstream production process. The heat consumption of cement clinker is reduced to 3100kJ/kg clinker, and the thermal efficiency of the cement clinker firing system is increased to about 45%. However, the temperature of the exhaust gas discharged from the system is still as high as 310-370°C, and the output per unit volume of the rotary kiln is less than 5t/m 3 .d.

如何进一步降低排出废气温度，提高水泥熟料烧成系统热效率，降低熟料烧成热耗，提高回转窑的单位容积产量，减少有害气体CO2、SO2、NOx等的排放是水泥制造企业亟待解决的技术问题。How to further reduce the exhaust gas temperature, improve the thermal efficiency of the cement clinker firing system, reduce the heat consumption of clinker firing, increase the output per unit volume of the rotary kiln, and reduce the emission of harmful gases such as CO 2 , SO 2 , NOx, etc. is an urgent need for cement manufacturing enterprises. Solved technical problems.

发明内容Contents of the invention

为了克服上述现有技术的不足，本发明的目的在于提供一种高固气比预热预分解水泥熟料煅烧工艺及设备，通过交叉料流实现预热器系统的高固气比化，通过物料外循环实现分解炉装置的高固气比化，降低了水泥熟料烧成热耗，提高了单机设备产能，减少了有毒有害气体的排放。In order to overcome the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a high solid-gas ratio preheating pre-decomposition cement clinker calcination process and equipment, realize the high solid-gas ratio of the preheater system through the cross flow, through The external circulation of materials realizes the high solid-gas ratio of the calciner device, reduces the heat consumption of cement clinker firing, improves the production capacity of stand-alone equipment, and reduces the emission of toxic and harmful gases.

为了实现上述目的，本发明采用的技术方案是：In order to achieve the above object, the technical scheme adopted in the present invention is:

一种高固气比预热预分解水泥熟料煅烧工艺，在水泥熟料烧成过程中，水泥原料首先在高固气比预热器1中与热烟气进行热交换，随后进入外循环式高固气比分解炉2，完成水泥原料中碳酸盐的分解，分解后的物料进入回转窑3煅烧，充分煅烧后的物料进入冷却机4冷却，完成熟料煅烧。A high solid-gas ratio preheating pre-decomposition cement clinker calcination process. During the cement clinker calcination process, the cement raw material first exchanges heat with the hot flue gas in the high solid-gas ratio preheater 1, and then enters the external circulation A high-solid-gas ratio calciner 2 completes the decomposition of carbonate in the cement raw material, and the decomposed material enters the rotary kiln 3 for calcination, and the fully calcined material enters the cooler 4 for cooling to complete clinker calcination.

其中，所述的热烟气来自回转窑尾，温度由最高900℃左右降至排出系统时的250～350℃，回转窑(3)的煅烧温度为1300～1450℃，冷却机(4)将物料冷却至60℃。Wherein, the hot flue gas comes from the tail of the rotary kiln, the temperature drops from about 900°C to 250-350°C when it is discharged from the system, the calcination temperature of the rotary kiln (3) is 1300-1450°C, and the cooling machine (4) will The material was cooled to 60°C.

本发明还提供了一种实现所述工艺的设备，包括The present invention also provides a kind of equipment for realizing said process, comprising

高固气比预热器1，由2列以上并行排列的旋风换热器组成，各列最上面的旋风换热器组成第一单元，各列最下面的旋风换热器组成最末单元，每列旋风换热器的气流路线为串联方式，水泥生料从每一单元的第一列旋风换热器始，与废烟气进行热交换，历遍各列后进入下一单元的第一列旋风换热器；High solid-gas ratio preheater 1 is composed of more than 2 rows of cyclone heat exchangers arranged in parallel, the top cyclone heat exchanger of each row forms the first unit, and the bottom cyclone heat exchanger of each row forms the last unit, The air flow route of each row of cyclone heat exchangers is in series mode. The cement raw material starts from the first row of cyclone heat exchangers of each unit, exchanges heat with the waste flue gas, and enters the first row of the next unit after traversing each row. Column cyclone heat exchanger;

外循环式高固气比分解炉2，包括分解炉本体21，分解炉本体21的出口连通旋流分离器22，旋流分离器22的出料口通过第一卸料锥体221连通第一下料管222，旋流分离器22还与旋风筒23连通，旋风筒23的出料口通过第二卸料锥体231连通第二下料管232；The external circulation type high solid-gas ratio calciner 2 includes a calciner body 21, the outlet of the calciner body 21 is connected to a cyclone separator 22, and the discharge port of the cyclone separator 22 is connected to the first discharge cone 221. The discharge pipe 222, the cyclone separator 22 is also communicated with the cyclone 23, and the outlet of the cyclone 23 is connected to the second discharge pipe 232 through the second discharge cone 231;

高固气比预热器1最末级最后一列的旋风换热器入口与分解炉本体21的出口相联接。The inlet of the cyclone heat exchanger in the last row of the last stage of the high solid-gas ratio preheater 1 is connected with the outlet of the decomposition furnace body 21 .

本发明所述的高固气比预热器1的特点是将并联平行的气流与交叉串行的料流相结合，从而提高了预热单元的固气比和系统的换热效率。The high solid-gas ratio preheater 1 of the present invention is characterized by combining parallel airflows and cross-serial streams, thereby improving the solid-gas ratio of the preheating unit and the heat exchange efficiency of the system.

外循环式高固气比分解炉2的特点是通过物料的炉外循环，提升了分解炉的热稳定性和出炉物料的表观分解率。The external circulation type high solid-gas ratio calciner 2 is characterized by the external circulation of materials, which improves the thermal stability of the calciner and the apparent decomposition rate of the discharged materials.

本发明与现有技术相比，具有以下优点：Compared with the prior art, the present invention has the following advantages:

一)由于本方法中，气固换热的各个单元内，固气质量比超出现行普通预热器一倍以上；外循环式高固气比分解炉内的固体粉料含量也超出其它类型分解炉30％以上，使排出系统的废气温度降至240～280℃，使出预热预分解系统物料的碳酸盐表观分解率超过97％，因此大幅度提升了系统的热效率、提高了系统产量。1) Because in this method, in each unit of gas-solid heat exchange, the solid-gas mass ratio is more than double that of the current ordinary preheater; the solid powder content in the external circulation type high solid-gas ratio decomposition furnace is also higher than other types of decomposition The temperature of the exhaust gas from the exhaust system is reduced to 240-280°C, and the apparent decomposition rate of carbonate in the preheating and pre-decomposition system exceeds 97%, thus greatly improving the thermal efficiency of the system and improving the efficiency of the system. Yield.

二)本发明高固气比预热预分解水泥熟料煅烧工艺，可以大幅提高窑系统的单机产能，且系统运行更加稳定，操作更加简单。2) The high solid-gas ratio preheating and pre-decomposing cement clinker calcination process of the present invention can greatly increase the single-machine production capacity of the kiln system, and the system operation is more stable and the operation is simpler.

三)本发明高固气比预热预分解水泥熟料煅烧工艺，大幅增加了气固间的接触面积，由于分解炉内碳酸盐分解产生了大量的碱性氧化物，所以脱硫效果显著提升，可以降低排出废气中SO2的含量；另由于外循环式分解炉的操作温度可以适当降低，炉内的温度波动很小，故可降低排出废气中NOx的含量。3) The high solid-gas ratio preheating and pre-decomposing cement clinker calcination process of the present invention greatly increases the contact area between gas and solid, and the desulfurization effect is significantly improved due to the decomposition of carbonate in the calciner to produce a large amount of alkaline oxides , can reduce the content of SO2 in the exhaust gas; in addition, because the operating temperature of the external circulation type decomposition furnace can be appropriately reduced, the temperature fluctuation in the furnace is small, so the content of NOx in the exhaust gas can be reduced.

综上所述，本发明具有诸多优点及实用价值，其不论在产品结构或功能上皆有较大的改进，在技术上有显著的进步，并产生了很好的效果。To sum up, the present invention has many advantages and practical value, it has great improvement no matter in product structure or function, has remarkable progress in technology, and has produced very good effect.

附图说明Description of drawings

图1是本发明实施例一的结构示意图。FIG. 1 is a schematic structural diagram of Embodiment 1 of the present invention.

图2是本发明实施例二的结构示意图。Fig. 2 is a schematic structural diagram of Embodiment 2 of the present invention.

图3是本发明实施例三的结构示意图。Fig. 3 is a schematic structural diagram of Embodiment 3 of the present invention.

具体实施方式Detailed ways

为更进一步阐述本发明为达成预定发明目的所采取的技术手段及功效，下面结合附图和实施例对本发明做进一步详细说明。In order to further illustrate the technical means and functions adopted by the present invention to achieve the intended invention purpose, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

本发明是一种高固气比预热预分解水泥熟料煅烧工艺，在水泥熟料烧成过程中，水泥原料首先在高固气比预热器1中与热烟气进行热交换，随后进入外循环式高固气比分解炉2，完成水泥原料中碳酸盐的分解，分解后的物料进入回转窑3煅烧，充分煅烧后的物料进入冷却机4冷却，完成熟料煅烧。The present invention is a high solid-gas ratio preheating and pre-decomposing cement clinker calcination process. During the cement clinker calcination process, the cement raw material first performs heat exchange with hot flue gas in the high solid-gas ratio preheater 1, and then Enter the external circulation type high solid-gas ratio calciner 2 to complete the decomposition of carbonate in the cement raw material, the decomposed material enters the rotary kiln 3 for calcination, and the fully calcined material enters the cooler 4 to cool down and complete the clinker calcination.

本发明还提供了一种实现所述工艺的设备，包括The present invention also provides a kind of equipment for realizing said process, comprising

高固气比预热器1，由2列以上并行排列的旋风换热器组成，各列最上面的旋风换热器组成第一单元，各列最下面的旋风换热器组成最末单元，每列旋风换热器的气流路线为串联方式，水泥生料从每一单元的第一列旋风换热器始，与废烟气进行热交换，历遍各列后进入下一单元的第一列旋风换热器；High solid-gas ratio preheater 1 is composed of more than 2 rows of cyclone heat exchangers arranged in parallel, the top cyclone heat exchanger of each row forms the first unit, and the bottom cyclone heat exchanger of each row forms the last unit, The air flow route of each row of cyclone heat exchangers is in series mode. The cement raw material starts from the first row of cyclone heat exchangers of each unit, exchanges heat with the waste flue gas, and enters the first row of the next unit after traversing each row. Column cyclone heat exchanger;

外循环式高固气比分解炉2，包括分解炉本体21，分解炉本体21的出口连通旋流分离器22，旋流分离器22的出料口通过第一卸料锥体221连通第一下料管222，旋流分离器22还与旋风筒23连通，旋风筒23的出料口通过第二卸料锥体231连通第二下料管232，为防止气流反向窜流，第一下料管222上设置第一卸料锁风阀223，第二下料管232上设置第二卸料锁风阀233；The external circulation type high solid-gas ratio calciner 2 includes a calciner body 21, the outlet of the calciner body 21 is connected to a cyclone separator 22, and the discharge port of the cyclone separator 22 is connected to the first discharge cone 221. Feed pipe 222, cyclone separator 22 is also communicated with cyclone tube 23, and the outlet of cyclone tube 23 communicates with the second feed pipe 232 by the second discharge cone 231, for preventing the reverse channeling of air-flow, the first The first unloading air lock valve 223 is set on the unloading pipe 222, and the second unloading air lock valve 233 is set on the second unloading pipe 232;

高固气比预热器1最末级最后一列的旋风换热器入口与分解炉本体21的出口相联接。The inlet of the cyclone heat exchanger in the last row of the last stage of the high solid-gas ratio preheater 1 is connected with the outlet of the decomposition furnace body 21 .

在实施例一中，如图1所示，高固气比预热器1由5级双系列高固气比旋风换热器组成，再配合外循环式高固气比分解炉2组成高固气比预热预分解系统，其中外循环式高固气比分解炉2中使用一个旋流分离器22和一个五级旋风分离器，其中该五级旋风分离器可以视作高固气比分解炉系统的一个单元，也可以视作预热器系统的末级单元，这是联接分解炉与预热器的设备单元，功能是将气固相分离，固相物料进入回转窑，废烟气用于预热生料。In the first embodiment, as shown in Figure 1, the high-solid-gas ratio preheater 1 is composed of 5-stage double-series high-solid-gas ratio cyclone heat exchangers, and then combined with an external circulation type high-solid-gas ratio decomposition furnace 2 to form a high-solids ratio preheater 1. Gas ratio preheating pre-decomposition system, wherein a cyclone separator 22 and a five-stage cyclone separator are used in the external circulation type high solid-gas ratio decomposition furnace 2, wherein the five-stage cyclone separator can be regarded as high-solid-gas ratio decomposition A unit of the furnace system can also be regarded as the final unit of the preheater system. This is the equipment unit connecting the calciner and the preheater. The function is to separate the gas and solid phases, and the solid phase materials enter the rotary kiln. For preheating raw meal.

实施例一在实验中的实际效果如表1所示。The actual effect of Embodiment 1 in the experiment is shown in Table 1.

Figure BDA0000051785030000041
Figure BDA0000051785030000041

在实施例二中，高固气比预热器1由5级双系列高固气比旋风换热器组成，再配合外循环式高固气比分解炉2组成高固气比预热预分解系统，其中外循环式高固气比分解炉2中使用两组旋流分离器22和两个五级旋风分离器。In Example 2, the high solid-gas ratio preheater 1 is composed of 5-stage double-series high solid-gas ratio cyclone heat exchangers, and then combined with the external circulation type high solid-gas ratio calciner 2 to form a high solid-gas ratio preheating pre-decomposition system, wherein two sets of cyclone separators 22 and two five-stage cyclone separators are used in the external circulation type high solid-gas ratio calciner 2.

在实施例三中，高固气比预热器1由5级双系列高固气比旋风换热器组成，再配合外循环式高固气比分解炉2组成高固气比预热预分解系统，其中外循环式高固气比分解炉中使用卧式旋风分离器。In Example 3, the high solid-gas ratio preheater 1 is composed of 5-stage double-series high solid-gas ratio cyclone heat exchangers, and then combined with the external circulation type high solid-gas ratio calciner 2 to form a high solid-gas ratio preheating pre-decomposition system, in which the horizontal cyclone separator is used in the external circulation high solid-gas ratio calciner.

本发明所述的高固气比预热器1的特点是将并联平行的气流与交叉串行的料流相结合，从而提高了预热单元的固气比和系统的换热效率。The high solid-gas ratio preheater 1 of the present invention is characterized by combining parallel airflows and cross-serial streams, thereby improving the solid-gas ratio of the preheating unit and the heat exchange efficiency of the system.

外循环式高固气比分解炉2的特点是通过物料的炉外循环，提升了分解炉的热稳定性和出炉物料的表观分解率。The external circulation type high solid-gas ratio calciner 2 is characterized by the external circulation of materials, which improves the thermal stability of the calciner and the apparent decomposition rate of the discharged materials.

另外，图中，C1A，C1B——C5A，C5B表示5级双系列高固气比旋风换热器。In addition, in the figure, C1A, C1B——C5A, C5B represent 5-stage double-series cyclone heat exchangers with high solid-gas ratio.

以上实施例并不是本发明的穷举，本发明的分解炉结构可有多种形式，例如，所述的旋风换热器的单元数可以从2到6个不等，其列数可以是2或3列，单元数和列数也可以根据实际的物料情况来确定。同时，外循环式高固气比分解炉2内气体断面风速最好在5～10米/秒范围内，但是也可以根据炉内料量来调整，本发明的物料外循环量可调，同时本发明的热空气流入流量也可调。The above embodiments are not exhaustive of the present invention, and the calciner structure of the present invention can have multiple forms, for example, the unit number of described cyclone heat exchanger can be different from 2 to 6, and its column number can be 2 Or 3 columns, the number of units and columns can also be determined according to the actual material situation. Simultaneously, the cross-sectional wind speed of gas in the external circulation type high solid-gas ratio calciner 2 is preferably in the range of 5 to 10 m/s, but it can also be adjusted according to the amount of material in the furnace. The external circulation of material in the present invention is adjustable, and at the same time The hot air inflow rate of the present invention is also adjustable.

以上所述，仅是本发明的较佳实施例而已，并非对本发明作任何形式上的限制，虽然本发明已以较佳实施例揭露如上，然而并非用以限定本发明，任何熟悉本专业的技术人员，在不脱离本发明技术方案范围内，当可利用上述揭示的技术内容作出些许更动或修饰为等同变化的等效实施例，但凡是未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均仍属于本发明技术方案的范围内。The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this field Those skilled in the art, without departing from the scope of the technical solution of the present invention, can use the technical content disclosed above to make some changes or modify equivalent embodiments with equivalent changes, but all the content that does not depart from the technical solution of the present invention, according to the present invention Any simple modifications, equivalent changes and modifications made to the above embodiments by the technical essence still belong to the scope of the technical solution of the present invention.

Claims (10)

1. high solid-gas ratio preheating predecomposition cement clinker calcining process, it is characterized in that, in the cement clinker sintering process, cement raw material at first carries out heat exchange with hot flue gas in high solid-gas ratio preheater (1), enter outer circulation type high solid-gas ratio decomposing furnace (2) subsequently, finish the decomposition of carbonate in the cement raw material, the material after the decomposition enters rotary kiln (3) calcining, material after fully calcined enters cooler (4) cooling, finishes clinker burning.
2. high solid-gas ratio preheating predecomposition cement clinker calcining process according to claim 1, it is characterized in that, described high solid-gas ratio preheater (1) is made up of the whirlwind heat exchanger of the above parallel arranged of 2 row, each is listed as uppermost whirlwind heat exchanger and forms first module, each is listed as nethermost whirlwind heat exchanger and forms the most last unit, the airflow route of every row whirlwind heat exchanger is a series system, cement slurry is from each unitary first row whirlwind heat exchanger beginning, carry out heat exchange with useless flue gas, go through all over the first row whirlwind heat exchanger that enters next unit behind each row.
3. high solid-gas ratio preheating predecomposition cement clinker calcining process according to claim 2 is characterized in that, the unit number that described whirlwind heat exchanger is formed is 2～6 grades.
4. high solid-gas ratio preheating predecomposition cement clinker calcining process according to claim 2 is characterized in that described high solid-gas ratio preheater (1) is made up of the whirlwind heat exchanger of 2 or 3 row parallel arranged.
5. high solid-gas ratio preheating predecomposition cement clinker calcining process according to claim 1, it is characterized in that, described outer circulation type high solid-gas ratio decomposing furnace (2) comprises decomposing furnace body (21), the outlet of decomposing furnace body (21) is communicated with cyclone separator (22), the discharge port of cyclone separator (22) is communicated with first tremie pipe (222) by the first discharging cone (221), cyclone separator (22) also is communicated with whirlwind tube (23), and the discharge port of whirlwind tube (23) is communicated with second tremie pipe (232) by the second discharging cone (231).
6. high solid-gas ratio preheating predecomposition cement clinker calcining process according to claim 5 is characterized in that, the first discharging air valve (223) is set on described first tremie pipe (222), and the second discharging air valve (233) is set on second tremie pipe (232).
7. high solid-gas ratio preheating predecomposition cement clinker calcining process according to claim 1 or 5 is characterized in that the interior gas sectional wind velocity of described outer circulation type high solid-gas ratio decomposing furnace (2) is in 5～10 meter per second scopes.
8. high solid-gas ratio preheating predecomposition cement clinker calcining process according to claim 1, it is characterized in that, described hot flue gas is from the rotary kiln tail, when temperature is reduced to the discharge system by the highest about 900 ℃ 250～350 ℃, the calcining temperature of rotary kiln (3) is 1300～1450 ℃, and cooler (4) is cooled to 60 ℃ with material.
9. a high solid-gas ratio preheating predecomposition burning clinker of cement equipment is characterized in that, comprises
High solid-gas ratio preheater (1), whirlwind heat exchanger by the above parallel arranged of 2 row is formed, each is listed as uppermost whirlwind heat exchanger and forms first module, each is listed as nethermost whirlwind heat exchanger and forms the most last unit, the airflow route of every row whirlwind heat exchanger is a series system, cement slurry carries out heat exchange from each unitary first row whirlwind heat exchanger beginning with useless flue gas, goes through all over the first row whirlwind heat exchanger that enters next unit behind each row;
Outer circulation type high solid-gas ratio decomposing furnace (2), comprise decomposing furnace body (21), the outlet of decomposing furnace body (21) is communicated with cyclone separator (22), the discharge port of cyclone separator (22) is communicated with first tremie pipe (222) by the first discharging cone (221), cyclone separator (22) also is communicated with whirlwind tube (23), and the discharge port of whirlwind tube (23) is communicated with second tremie pipe (232) by the second discharging cone (231);
The whirlwind heat exchanger inlet of last row of final stage of high solid-gas ratio preheater (1) links with the outlet of decomposing furnace body (21).
10. suspended state outer circulation type high solid-gas ratio decomposition reactor according to claim 9 is characterized in that, described decomposing furnace body (21) connects two cyclone separators (22).
CN201110070270.6A 2011-03-24 2011-03-24 Calcining process and equipment for preheating and pre-decomposing cement clinker in high-solid-gas ratio Pending CN102219409A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012126387A1 (en) * 2011-03-24 2012-09-27 西安建筑科技大学 Process and apparatus for calcining cement clinker with pre-heating and pre-decomposition at high solid-to-gas ratio
WO2012126389A1 (en) * 2011-03-24 2012-09-27 西安建筑科技大学 External-circulation decomposition reactor with high solid-gas ratio using horizontal cyclone cylinder
CN102923979A (en) * 2012-10-19 2013-02-13 安徽海螺建材设计研究院 Clinker production line for novel dry process cement kiln and denitration process method for clinker production line
CN103588399A (en) * 2013-11-19 2014-02-19 南京工业大学 Cement predecomposition kiln
CN104583148A (en) * 2012-07-04 2015-04-29 蒂森克虏伯工业解决方案股份公司 Method and system for producing cement clinker from cement raw meal mixture
CN106152793A (en) * 2015-04-05 2016-11-23 南京凯盛国际工程有限公司 High solid-gas ratio preheater with pre-burner and pre-heating mean thereof
CN108947285A (en) * 2018-08-03 2018-12-07 吴超 The new method of the spiral flow fluidized circulation Rapid Heating-up Burning of Cement Clinker of bulky grain
CN110510894A (en) * 2019-10-09 2019-11-29 南京凯盛国际工程有限公司 A preheating and precalcining system for dry cement production
CN112844003A (en) * 2019-11-28 2021-05-28 中国科学院工程热物理研究所 Multistage suspension preheater, control method and control method of cement clinker generation equipment

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* Cited by examiner, † Cited by third party
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1415926A (en) * 2002-11-11 2003-05-07 西安建筑科技大学 Heat treatment equipment for powdery material in crossed feed influents with high ration between solid and gas
CN1618761A (en) * 2003-11-17 2005-05-25 成都建筑材料工业设计研究院有限公司 New type wet grinding dry burning technology

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2583102Y (en) * 2002-11-26 2003-10-29 西安建筑科技大学 Outside kiln circulation device used for cement green stock high temperature preheating and decomposition
CN102219409A (en) * 2011-03-24 2011-10-19 西安建筑科技大学 Calcining process and equipment for preheating and pre-decomposing cement clinker in high-solid-gas ratio

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1415926A (en) * 2002-11-11 2003-05-07 西安建筑科技大学 Heat treatment equipment for powdery material in crossed feed influents with high ration between solid and gas
CN1618761A (en) * 2003-11-17 2005-05-25 成都建筑材料工业设计研究院有限公司 New type wet grinding dry burning technology

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* Cited by examiner, † Cited by third party
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WO2012126387A1 (en) * 2011-03-24 2012-09-27 西安建筑科技大学 Process and apparatus for calcining cement clinker with pre-heating and pre-decomposition at high solid-to-gas ratio
WO2012126389A1 (en) * 2011-03-24 2012-09-27 西安建筑科技大学 External-circulation decomposition reactor with high solid-gas ratio using horizontal cyclone cylinder
CN104583148A (en) * 2012-07-04 2015-04-29 蒂森克虏伯工业解决方案股份公司 Method and system for producing cement clinker from cement raw meal mixture
CN104583148B (en) * 2012-07-04 2016-10-19 蒂森克虏伯工业解决方案股份公司 Method and system for producing cement clinker from cement raw meal mixture
US9630879B2 (en) 2012-07-04 2017-04-25 Thyssenkrupp Industrial Solutions Ag Method and system for producing cement clinker from raw cement mixture
CN102923979A (en) * 2012-10-19 2013-02-13 安徽海螺建材设计研究院 Clinker production line for novel dry process cement kiln and denitration process method for clinker production line
CN102923979B (en) * 2012-10-19 2014-07-23 安徽海螺建材设计研究院 Clinker production line for novel dry process cement kiln and denitration process method for clinker production line
CN103588399A (en) * 2013-11-19 2014-02-19 南京工业大学 Cement predecomposition kiln
CN106152793A (en) * 2015-04-05 2016-11-23 南京凯盛国际工程有限公司 High solid-gas ratio preheater with pre-burner and pre-heating mean thereof
CN108947285A (en) * 2018-08-03 2018-12-07 吴超 The new method of the spiral flow fluidized circulation Rapid Heating-up Burning of Cement Clinker of bulky grain
CN110510894A (en) * 2019-10-09 2019-11-29 南京凯盛国际工程有限公司 A preheating and precalcining system for dry cement production
CN112844003A (en) * 2019-11-28 2021-05-28 中国科学院工程热物理研究所 Multistage suspension preheater, control method and control method of cement clinker generation equipment

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