Desulfuration and dust collection method based on reverse spray type semidry method for flue gas of sintering machine

A semi-dry desulfurization and sintering machine technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of low investment and achieve the effects of low investment, long desulfurization reaction time, and improved operation level

Inactive Publication Date: 2011-06-08
秦皇岛双轮环保科技股份有限公司
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is to provide a reverse spray semi-dry desulfurization and dust removal method for sintering machine flue gas, which has relatively low investment, high desulfurization and dust removal efficiency, and is not affected by flue gas properties, temperature, flow rate, etc. Advantages, suitable for flue gas desulfurization and dust removal systems of various sintering machines

Method used

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Embodiment Construction

[0028] The flue gas from the sintering machine is atomized by industrial water nozzles in the flue and sprayed into it for cooling. The cooled flue gas enters the desulfurization tower from the upper part of the desulfurization tower through the flue. After the desulfurization of the desulfurization tower, the flue gas passes through the lower part of the desulfurization tower, and the activated calcium hydroxide particles are sprayed into the flue, and the SO in the flue gas is mixed with a high mass transfer rate. 2 and other acidic substances mixed reaction to generate CaSO 4 and CaSO 3 , and CaCl 2 and other reaction products. A small part of these dry products are discharged from the ash outlet of the scraper machine at the bottom of the flue, and most of them enter the bag filter with the flue gas.

[0029] The high dust-containing gas after the desulfurization reaction enters the air inlet of the cloth dust collector. Considering the characteristics of the flue gas o...

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PUM

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Abstract

The invention discloses a desulfuration and dust collection method based on a reverse spray type semidry method for flue gas of a sintering machine. The desulfuration and dust collection method comprises the steps of cooling, desulfuration by virtue of a desulfurizer and dust collection by virtue of a cloth bag, wherein the flue gas is reversely sprayed by a flue before the desulfurizer, and slaked lime is sprayed to the flue gas so as to perform primary desulfuration and cool the flue gas. In the desulfurizer, the flue gas is further desulfurized and cooled. Then desulfuration ash is sprayedto the flue gas through a flue at the bottom of the desulfurizer so as to perform desulfurization. The desulfurized flue gas enters an efficient bag-type dust collector for further desulfuration and dust collection of the flue gas. The desulfuration and dust collection method disclosed by the invention has the advantages of relatively low investment, high desulfuration and dust collection efficiency and the like, and is free from influence of the properties, temperature and flow of the flue gas and suitable for the flue gas desulfuration and dust collection systems of various sintering machines.

Description

technical field [0001] The invention relates to a reverse spraying semi-dry desulfurization and dust removal method for flue gas of a sintering machine. Background technique [0002] The sintering flue gas is the dust-containing waste gas generated during the high-temperature sintering molding process after the sintering mixture is ignited and running with the trolley. The main characteristics of the sintering flue gas are: (1) The annual operating rate of the sintering machine is high, reaching more than 90% , The amount of flue gas emission is large. (2) The components of the flue gas are complex and variable according to the change of ingredients. (3) The temperature of the flue gas fluctuates greatly, ranging from 90 to 150°C; (4) The humidity of the flue gas is relatively large, generally around 10%; (5) Due to the relationship between the sulfur content of the sintering raw materials, the emission of SO in flue gas 2 The concentration changes greatly with the change ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/80B01D53/50B01D50/00
Inventor 姜述玉姚殿宝温建孙艳燕李春生
Owner 秦皇岛双轮环保科技股份有限公司
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