Method of using chlorine dioxide containing liquid to carry out denitration

A chlorine dioxide, liquid technology, applied in the field of flue gas denitrification, can solve the problems of high cost, poor chlorine dioxide denitration effect, etc., and achieve the effect of obvious cost advantage

Pending Publication Date: 2020-06-05
SHANDONG NORMAL UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] Different from the existing technical route, the present invention provides a method for flue gas denitrification using chlo

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  • Method of using chlorine dioxide containing liquid to carry out denitration
  • Method of using chlorine dioxide containing liquid to carry out denitration

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Embodiment Construction

[0076] Best practice

[0077] The present invention will be explained in conjunction with the drawings:

[0078] A spray tower, a cylinder with a diameter of 0.8m, a tower height of 5m, and a wall thickness of 8mm, made of 304L stainless steel. A sprayer 1 is installed at a position 1.5 meters away from the top of the tower. The sprayer 1 is composed of three 90° cone solid nozzles 2, which are evenly arranged in a cross section. The sprayer 1 is connected with the liquid outlet of the liquid mixer 3. The mixer 3 is a 316 steel spherical shell with a diameter of 200mm, which is arranged on the upper part of the sprayer 1. The mixer 3 has two liquid inlets, which are connected to the inlet pipe 4 of chlorine dioxide and the acid inlet pipe 5 of nitric acid respectively. . The chlorine dioxide inlet pipe 4 is connected to the chlorine dioxide generator 6 outside the spray tower, and the pipeline is also provided with a booster pump 7 and a flow regulating valve 8. The other end o...

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Abstract

The invention provides a method of using chlorine dioxide containing liquid to carry out denitration. The method comprises the following steps: (1) preparing a chlorine dioxide containing liquid; (2)mixing nitric acid with the chlorine dioxide containing liquid to form a mixed solution; (3) contacting the mixed solution with flue gas, oxidizing NO in the flue gas into high-valence NOx by chlorinedioxide in the mixed solution, and absorbing the high-valence NOx by nitric acid in the mixed solution; (4) separating the flue gas from the mixed solution. Nitric acid is used as an absorbent, and the technical problems of poor denitration effect of chlorine dioxide and high cost in the prior art are solved.

Description

Technical field [0001] The invention relates to the field of flue gas denitration, in particular to a method for flue gas denitration using a chlorine dioxide-containing solution. Background technique [0002] Coal-fired power generation, steelmaking in steel mills, and other processes that use coal and petroleum as heat sources are one of the main sources of increased nitrogen oxides in the environment. In order to reduce the impact on the environment, various manufacturers have adopted many methods to reduce the emission of nitrogen oxides in the combustion tail gas (the "flue gas" in the present invention), that is, the flue gas is denitrated. In general flue gas, NO often accounts for about 90% of the total nitrogen oxides, but NO is difficult to dissolve in water, so it is difficult to remove it by washing or lye neutralization. This is also the current difficulty in flue gas denitration Where. Existing flue gas denitration technologies mainly fall into two categories, one...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/56
CPCB01D53/78B01D53/56B01D2258/0283
Inventor 刘明张菡英赵莉钤小平
Owner SHANDONG NORMAL UNIV
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