Novel semi-dry flue gas desulphurization technology

A desulfurization process, semi-dry technology, applied in the field of flue gas desulfurization, can solve the problem of high sodium-alkali consumption

Inactive Publication Date: 2011-11-02
JIANGSU ZHENGTONG HONGTAI INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] (5) High consumption of sodium and alkali;

Method used

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  • Novel semi-dry flue gas desulphurization technology
  • Novel semi-dry flue gas desulphurization technology

Examples

Experimental program
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Embodiment Construction

[0039] The coal-fired flue gas enters the chimney through the bypass baffle door after electrostatic precipitator and is discharged. When desulfurization, open the inlet and outlet baffle door of the absorption tower. The flue gas is discharged into the chimney through the outlet damper door.

[0040] The desulfurized absorption liquid is sent to the neutralization regeneration tank by the discharge pump, mixed with the lime milk slurry pumped by the lime milk slurry pump, and regenerated by reaction. After regeneration, the regeneration solution is pumped into the inclined plate settler by the mixed liquid pump for clarification After separation, the supernatant overflows into the regenerated liquid tank, and the lye pumps into the added sodium lye to adjust the pH value of the absorbent liquid, and then is pumped into the bottom of the absorption tower by the regenerated liquid for cyclic absorption.

[0041] The underflow liquid of the inclined plate settler flows into the ...

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Abstract

The invention relates to a novel semi-dry flue gas desulphurization technology, which is characterized in that: (1) appropriate equipment types are selected during equipment selection; (2) processing procedures are designed according to designed equipment parameters; (3) the processing procedures are operated according to operating parameters. With the technology, harmful acidic components such as SO2 are subject to a reaction with a neutralizer, such that sulfate, or the like, is produced. During the processes, acidic gas components are turned into solid salts, such that the gas state acidic components are removed from gas, and the gas is purified. Therefore, a purpose of meeting a national discharging standard is achieved.

Description

technical field [0001] The invention belongs to the technical field of flue gas desulfurization, and in particular relates to a combined technology for improving the reliability of a double-alkali desulfurization device. Background technique [0002] Flue gas desulfurization is an important measure to prevent and control air pollution. Since the development of the double-alkali flue gas desulfurization commonly used in small and medium-sized power plants, many devices have been established. However, due to many engineering problems in equipment selection and operation methods, some devices The stability and reliability of the operation are not high, and the main problems can be summarized as follows: [0003] (1) If the swirling plate absorption tower has high resistance and low efficiency; [0004] (2) Calcium scaling in the absorption tower and circulation pipeline; [0005] (3) sodium sulfate crystallization is separated out in the absorption tower; [0006] (4) the re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/83B01D53/50
Inventor 胡俊华
Owner JIANGSU ZHENGTONG HONGTAI INC
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