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Flue gas desulfurization system

A desulfurization system and flue gas technology, applied in the field of air pollution control, can solve the problems of difficulty in meeting the requirements of desulfurization efficiency, insufficient gas-liquid reaction, and long oxidation and crystallization time, so as to improve the oxidation rate and desulfurization efficiency of the system, save space, The effect of reducing energy consumption

Active Publication Date: 2015-09-02
JIANGSU LANSHAN ENVIRONMENT TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional limestone / lime-gypsum desulfurization process is prone to problems such as equipment scaling and blockage, large slurry pool, and desulfurization efficiency that cannot meet the requirements. Analysis of the reasons is mostly caused by insufficient gas-liquid reaction and long oxidation crystallization time.

Method used

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  • Flue gas desulfurization system
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Embodiment Construction

[0031] In order to clarify the technical scheme and technical purpose of the present invention, the present invention will be further introduced below in conjunction with the accompanying drawings and specific embodiments.

[0032] Such as figure 1 A flue gas desulfurization system shown includes the following components:

[0033] (1) Raw material system 1;

[0034] The raw material system 1 includes a desulfurizing agent powder bin 1-1, a screw feeder 1-2, a pulping box 1-3, an agitator 1-4, a slurry supply pump 1-5, etc. The desulfurizing agent in this embodiment adopts granular Limestone powder with a diameter of 200-300 mesh and a purity greater than 90% is directly beaten to the powder bin 1-1 by a pump truck, weighed by the feeder 1-2, and then transported to the pulping box 1-3, and mixed with the hydraulic cyclone. The overflow liquid of the flow device 4-1 or the process water are mixed to form a desulfurization slurry, the slurry has a solid content of 10% to 15%, ...

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Abstract

The invention discloses a flue gas desulfurization system which comprises a raw material system, an absorption system, an oxidation and crystallization system and a dehydrating system. The flue gas desulfurization system is characterized in that the oxidation and crystallization system comprises a crystallization pool and an external oxidation pool arranged above the crystallization pool; a feeding opening is formed at the upper part of the external oxidation pool; first and second discharging openings are formed at the lower part of the external oxidation pool; the absorption system comprises an absorption tower; a circular discharging opening, a first circular feeding opening and a second circular feeding opening are formed in the slurry zone of the absorption tower; the absorption tower is connected with the feeding opening of the external oxidation pool through the circular discharging opening and connected with the first discharging opening of the external oxidation pool through the first circular feeding opening; the crystallization pool is connected with the dehydrating system through a crystal slurry outlet formed in the bottom of the crystallization pool; the feeding opening of the crystallization pool is connected with the second discharging opening of the external oxidation pool; a fine crystal outlet connected with the second circular feeding opening of the absorption tower is formed at the upper part of the crystallization pool. According to the flue gas desulfurization system, the oxidation rate and desulfurization efficiency of the system can be effectively improved and the byproduct gypsum is high in quality.

Description

technical field [0001] The invention belongs to the technical field of air pollution control, specifically a flue gas desulfurization system. Background technique [0002] The limestone / lime-gypsum method is the most widely used desulfurization process at present. The desulfurization process involves multiple chemical reactions such as the absorption of sulfur dioxide, the dissolution of calcium carbonate, the oxidation of sulfite, and the crystallization of gypsum. In the traditional design, the above reactions are all completed in the desulfurization absorption tower, and the SO is absorbed by reverse spraying desulfurizer slurry. 2 Calcium sulfite is generated, and oxidizing air is blown directly into the slurry tank to oxidize calcium sulfite into gypsum, and the gypsum is discharged into subsequent dehydration equipment after crystallization. The traditional limestone / lime-gypsum desulfurization process is prone to problems such as equipment scaling and blockage, large...

Claims

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Application Information

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IPC IPC(8): B01D53/80B01D53/50B01D53/73
Inventor 凌斌罗三强赵云清潘小玉聂江宁
Owner JIANGSU LANSHAN ENVIRONMENT TECH
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