Predecomposition kiln internal circulating flue gas desulfurization technology

A technology of precalcining kiln and internal circulation, which is applied in separation methods, dispersed particle separation, chemical instruments and methods, etc., and can solve problems such as complex management, difficult treatment of wet desulfurized gypsum, and large investment

Inactive Publication Date: 2016-11-02
齐砚勇 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Not only the investment is large, the management is complicated, but also the cost of desulfurization agent is high, and the treatment of wet desulfurization gypsum is difficult

Method used

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  • Predecomposition kiln internal circulating flue gas desulfurization technology
  • Predecomposition kiln internal circulating flue gas desulfurization technology
  • Predecomposition kiln internal circulating flue gas desulfurization technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] A 5000t / d cement plant in Wanzhou, Chongqing uses quicklime for desulfurization, and its clinker composition is:

[0017]

[0018] The online detection of the tail chimney shows that the average smoke emission is 900,000 m3 3 / h (temperature about 100°C), per ton of quicklime, can reduce SO 2 The amount is 70~80mg / m 3 . The flue gas discharged from the kiln tail is discharged from the C1 outlet through the vertical mill. Due to air leakage, the oxygen content in the flue gas will increase from about 2% to 10%, or even higher. Equivalent to C1 outlet desulfurization, each ton of quicklime can reduce SO 2 The amount is 120~140mg / m 3 .

Description of drawings

[0019] picture 1 is the engineering process of the present invention picture ;

[0020] picture 2 is the process picture .

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Abstract

Relating to a removal technology of SO2 generated by production of fuel from cement, the invention provides a predecomposition kiln internal circulating flue gas desulfurization technology. Part of a class 5 cyclone high temperature material is cooled by a class 3 suspension cooling system, then the material is fed into a C1 cyclone by a kiln feeding zipper elevator to react with SO2 in flue gas so as to form CaSO3, thus realizing flue gas desulphurization. The high temperature air at a CL1 outlet converges with C5 outlet, the desulfurizer accounts for about 3% of the kiln feed raw material, and no additional desulfurizer is needed. The technology provided by the invention is used for cement plant flue gas desulfurization.

Description

technical field [0001] The invention belongs to the field of cement production and uses a new technology of desulfurization of hot raw meal by utilizing the circulation in a precalcining kiln to solve the problem of high cost of desulfurization by a desulfurizer. Background technique [0002] Since the late 1960s, flue gas desulfurization technology has developed rapidly. According to the published literature statistics, there are more than 200 kinds of technology, but most of these methods are in the laboratory stage or small-scale test stage, and only 10 kinds have been put into practice at present. Flue gas desulfurization technology can be divided into three categories: wet method, dry method and semi-dry method according to the desulfurization method and the form of the desulfurization reaction product. Generally, the desulfurization process in which the desulfurization product generated by using aqueous solution or liquid filling as a desulfurizing agent exists in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/81B01D53/50
Inventor 齐砚勇刘端
Owner 齐砚勇
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