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Synergistic agent for flue gas desulfurization process adopting wet limestone-gypsum method and application thereof

A technology of desulfurization process and synergist, applied in separation methods, chemical instruments and methods, separation of dispersed particles, etc., to achieve the effect of simple operating conditions, convenient operation, and good expansion effect

Active Publication Date: 2013-10-16
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problems of low desulfurization efficiency and high operating cost of synergists in the existing wet limestone gypsum flue gas desulfurization process, the present invention provides a new type of synergist, which can be used without changing the original structure and flow of the desulfurization process. , significantly improve the desulfurization efficiency of the system, its cost is greatly reduced compared with the existing research, and there is no corrosion and secondary pollution problems

Method used

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  • Synergistic agent for flue gas desulfurization process adopting wet limestone-gypsum method and application thereof

Examples

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Effect test

Embodiment 1

[0020] Preparation and use of embodiment 1 synergist of the present invention

[0021] For the flue gas desulfurization device of a 300MW unit in a coal-fired power plant, the slurry volume of the absorption tower is 1250m 3 , when the synergist is added, the desulfurization efficiency of the system is about 87%. 0.37t borax (containing 95% Na 2 B 4 o 7 10H 2 O) add 30m 3 In the pit of the absorption tower, add water and stir for 30 minutes to make a suspension of the synergist; use the pit pump to inject the synergist into the absorption tower, wash the pit repeatedly for 3 times and add it to the absorption tower, then absorb Tower, Na 2 B 4 o 7 The concentration is 7.30×10 -4 mol L -1 . Use the flue gas online monitor to export SO to the system 2 The concentration and desulfurization efficiency were tested, and the results showed that when the synergist was added to the absorption tower for 2 hours, the desulfurization efficiency of the system increased to about...

Embodiment 2

[0022] Preparation and use of embodiment 2 synergist of the present invention

[0023] For the flue gas desulfurization device of a 300MW unit in a coal-fired power plant, the slurry volume of the absorption tower is 1250m 3 , when the synergist is added, the desulfurization efficiency of the system is about 87%. 0.73t borax (containing 95% Na 2 B 4 o 7 10H 2 O) add 30m 3 In the pit of the absorption tower, add water and stir for 30 minutes to make a suspension of the synergist; use the pit pump to inject the synergist into the absorption tower, wash the pit repeatedly for 3 times and add it to the absorption tower, then absorb Tower, Na 2 B 4 o 7 The concentration is 1.46×10 -3 mol L -1 . Use the flue gas online monitor to export SO to the system 2 The concentration and desulfurization efficiency were tested, and the results showed that when the synergist was added to the absorption tower for 2 hours, the desulfurization efficiency of the system increased to about...

Embodiment 3

[0024] Preparation and use of embodiment 3 synergist of the present invention

[0025] For the flue gas desulfurization device of a 300MW unit in a coal-fired power plant, the slurry volume of the absorption tower is 1250m 3 , when the synergist is added, the desulfurization efficiency of the system is about 87%. 2.19t borax (containing 95% Na 2 B 4 o 7 10H 2 O) add 30m 3 In the pit of the absorption tower, add water and stir for 30 minutes to make a suspension of the synergist; use the pit pump to inject the synergist into the absorption tower, wash the pit repeatedly for 3 times and add it to the absorption tower, then absorb Tower, Na 2 B 4 o 7 The concentration is 4.38×10 -3 mol L -1 . Use the flue gas online monitor to export SO to the system 2 The concentration and desulfurization efficiency were tested, and the results showed that when the synergist was added to the absorption tower for 2 hours, the desulfurization efficiency of the system increased to about...

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Abstract

The invention discloses a synergistic agent for a flue gas desulfurization process adopting a wet limestone-gypsum method and application thereof, and belongs to the technical field of flue gas SO2 control directly applied to atmospheric environment protection. The synergistic agent is sodium pyroborate or hydrate thereof. The synergistic agent can be applied according to the following mode: the sodium pyroborate (molecular formula Na2B4O7) or hydrate thereof is dissolved in water to obtain a synergistic agent suspension; and the synergistic agent suspension is added in a desulfurization absorber liquid holding groove, wherein in the desulfurization absorber liquid holding groove, the synergistic agent suspension is added in the sodium pyroborate with the amount-of-substance concentration of 1.46*10<-4>-7.29*10<-3>mol.L<-1>. According to the synergistic agent provided by the invention, the desulfurization efficiency can be remarkably improved on the premise of not changing a traditional desulfurization system.

Description

technical field [0001] The invention belongs to flue gas SO directly applied in atmospheric environment protection 2 The field of control technology, in particular, relates to a synergist for wet limestone gypsum flue gas desulfurization process and its application. The desulfurization efficiency can be significantly improved without changing the existing desulfurization system. Background technique [0002] SO from coal burning 2 Pollution has posed a serious threat to my country's atmospheric environment, among which the thermal power industry is the most important source of pollution. At present, most domestic thermal power plants have established flue gas desulfurization technology represented by wet limestone gypsum method, so that SO 2 Pollution has been effectively controlled. However, on the one hand, due to the increasingly tight supply of thermal coal, the sulfur content of the coal used in the existing desulfurization process has been greatly increased compare...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/78B01D53/50
Inventor 李蔷薇汪黎东赵毅唐舒张天赢
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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