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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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

Method used

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  • Flue gas desulfurization system
  • Flue gas desulfurization system
  • Flue gas desulfurization system

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Example Embodiment

[0031] In order to clarify the technical solutions and technical objectives of the present invention, the present invention will be further described below in conjunction with the 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 desulfurizer powder warehouse 1-1, a screw feeder 1-2, a slurry box 1-3, a mixer 1-4, a slurry pump 1-5, etc. The desulfurizer in this embodiment uses granular Limestone powder with a diameter of 200-300 meshes and a purity greater than 90% is directly pumped to the powder bin 1-1 by a pump truck, weighed by the feeder 1-2, and then transported to the slurry box 1-3, and is rotated The overflow liquid or process water of the flow device 4-1 is mixed to form a desulfurization slurry with a solid content of 10% to 15%, which is transported by the slurry supply pump 1-5 to the inlet of the desul...

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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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