Combined flue gas cleaning system and flue gas cleaning method thereof

A flue gas purification system and combined technology, applied in the direction of chemical instruments and methods, combined devices, separation methods, etc., can solve the problems of ineffective removal of acid gas and solid dust, increase of spray tower diameter and volume, Increased investment costs and other issues, to achieve the effect of reducing wastewater discharge, reducing equipment investment, and simple structure

Inactive Publication Date: 2015-02-04
SHANGHAI LANKE PETROCHEM ENG & TECH
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Problems solved by technology

[0004] However, the above structure will lead to an increase in the diameter and volume of the spray tower, which will directly lead to an increase in investment costs; moreover, the pressure drop of this spray tower is high, and the power consumption is large, and sometimes it is even necessary to increase and modify the upstream waste heat boiler , which further leads to an increase in indirect costs
Not only that, but the existing spray tower has not been able to efficiently remove acid gas and solid dust

Method used

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  • Combined flue gas cleaning system and flue gas cleaning method thereof

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Embodiment Construction

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

[0040] The combined flue gas purification system of the present invention is composed of a countercurrent injection pipe and a spray washing tower. The flue gas enters the straight barrel type counter-current injection pipe from top to bottom, and the counter-current spray layer sprays the absorption liquid from bottom to top. The gas-liquid two-phase reversely collides in the counter-current injection tube, and a foam zone is formed in the counter-current injection tube due to the principle of ga...

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Abstract

The invention provides a combined flue gas cleaning system. The combined flue gas cleaning system comprises a spraying washing tower, and an upstream injection pipe arranged vertically, wherein an inlet of the upstream injection pipe is communicated with a waste flue gas discharge hole, while an outlet of the upstream injection pipe is communicated with the spraying washing tower, and the position at which the outlet of the upstream injection pipe is communicated with the spraying washing tower is located between an upper spraying layer and a lower spraying liquid tank of the spraying washing tower, wherein an upstream spraying layer is arranged inside the upstream injection pipe and the spraying direction of the upstream spraying layer is opposite to the flowing direction of the flue gas. The invention also provides a flue gas cleaning method. Due to the adopted combined flue gas cleaning system, the operation pressure drop, the sewage discharge quantity and the equipment investment can be reduced.

Description

technical field [0001] The invention relates to the technical field of flue gas treatment, in particular to a combined flue gas purification system and a purification method thereof. Background technique [0002] Environmental pollution has become a major problem in the development of our country. Sulfur dioxide, nitrogen oxides and solid dust are the most influential pollutants in the air pollutants, which are extremely harmful to the human body, the environment and the ecological system. Sulfur dioxide and nitrogen oxides mainly come from the combustion process of fossil fuels such as coal and petroleum, as well as the smoke emissions from the roasting of ore and smelting process. In the current flue gas treatment, it is found that the exhaust fumes of various thermal power plants, boilers and oil refineries are difficult to treat because of their low solubility, large flue gas volume, and many floating dusts. [0003] Spray tower alkali absorption and removal of nitrogen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/96B01D53/40B01D50/00
Inventor 李少云李军伟马洪玺张文军
Owner SHANGHAI LANKE PETROCHEM ENG & TECH
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