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Device and method for removing high-concentration sulfur dioxide through interactive spray washing

A sulfur dioxide, high-concentration technology, applied in the direction of chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problem of pH value change rate, temperature change is very different, absorption operation is difficult to control, slurry pH, slurry temperature is difficult to control, etc. problem, to achieve the effect of ensuring constant and consistent, stable absorption operation

Active Publication Date: 2012-10-31
YONKER ENVIRONMENTAL PROTECTION
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  • Abstract
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Problems solved by technology

As a result, the slurry density, pH value change rate, and temperature change of the two towers are very different, which not only makes it difficult to control the slurry density, slurry pH, and slurry temperature of the two towers during the absorption process, but also causes the sulfur dioxide concentration in the flue gas after washing to decrease. High and low, frequent fluctuations, and a very large fluctuation range, which makes the absorption operation difficult to control. In severe cases, the sulfur dioxide emitted from the purified flue gas will seriously exceed the standard, which cannot meet the purification requirements for the flue gas.

Method used

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  • Device and method for removing high-concentration sulfur dioxide through interactive spray washing

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Embodiment 1

[0034] like figure 1 As shown, the device for removing high-concentration sulfur dioxide by alternating spraying and washing includes an absorption tower A 1 with a flue gas inlet A 18 in the middle and lower part, a flue gas outlet A 19 in the upper part, and an absorbent inlet 20 in the lower part. The bottom connecting pipe 21 communicates with the absorption tower A1, and the middle and lower part is provided with a flue gas inlet B 22, the top is equipped with a flue gas outlet B 23, and the bottom is equipped with a slurry discharge port 24 Absorption tower B2; the flue gas outlet A 19 Communicate with the flue gas inlet B 22 through the flue gas pipe 35;

[0035] The upper part of the absorption tower A1 is provided with a spray layer A10 with nozzles, and the lower part is a slurry pool A25; The demister rinsing water pipe network 13 with nozzles, the demister 12 and the spray layer B 11 with nozzles, the lower part of the absorption tower B 2 is the slurry pool B 28;...

Embodiment 2

[0043] The method for removing high-concentration sulfur dioxide by alternating spraying and washing: When using the method of the present invention to wash and remove high-concentration sulfur dioxide flue gas, pass the flue gas containing high-concentration sulfur dioxide into the absorption tower A1, and start the slurry circulation pump B8 to extract and absorb The slurry in the slurry tank B 28 at the bottom of the tower B 2 is sent to each spray layer A 10 in the absorption tower A 1, the slurry is atomized by the nozzles connected to each spray layer A 10 and sprayed evenly downwards, and the slurry is dispersed into The fine liquid droplets cover the section corresponding to the absorption tower A 1, contact with the flue gas flowing upwards countercurrently, absorb the sulfur dioxide in the flue gas and fall into the slurry pool A 25 at the bottom of the absorption tower A 1; the flue gas is absorbed for the first time After washing, it enters the absorption tower B2. ...

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Abstract

The invention discloses a sulfur dioxide aiming at high-concentration sulfur dioxide flue gas, adopting two-tower slurry interactive spray washing and keeping basic conformance of characteristics of slurry in a two-tower slurry pool. No other additional slurry transferring device is added between two towers, reciprocating circulation flow of the slurry between the two towers can be achieved, conformance of two-tower slurry concentration, slurry pH value, slurry temperature and slurry liquid level can be maintained, and equal proportion absorption of two-tower spraying layers to flue gas sulfur dioxide is achieved. The device and the method enable the two towers to absorb high-concentration sulfur dioxide of flue gas stably and save investment of a set of slurry parameter detection system.

Description

technical field [0001] The invention belongs to the technical field of flue gas desulfurization, in particular to a desulfurization method for sulfur dioxide concentration exceeding 10000mg / Nm 3 The flue gas of the coal-fired boiler and the industrial kiln adopts the double-tower slurry alternately spraying and washing, and the device and method for keeping the characteristics of the slurry in the double-tower slurry pool consistent. Background technique [0002] During the "Twelfth Five-Year Plan" period, the state implemented total emission control of sulfur dioxide pollutants. By 2015, the national sulfur dioxide emissions should be controlled at 20.864 million tons. According to the "Twelfth Five-Year Plan", on the basis of digesting new construction increments, sulfur dioxide emissions need to be reduced by 8%. This will become a binding indicator for governments at all levels to reduce sulfur dioxide emissions. In order to achieve the above binding targets, the cons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/80B01D53/50
Inventor 冯延林李玉兰
Owner YONKER ENVIRONMENTAL PROTECTION
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