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Scale remover of flue gas reheater in flue gas desulfurization system

A flue gas reheater and desulfurization system technology, applied in the direction of detergent composition, chemical equipment and method, soap detergent composition, etc., can solve the problem of low removal rate of GGH hard scale, increase of scaling rate, and influence of heat transfer Effects and other issues, to achieve economic and social benefits, less environmental pollution, good cleaning effect

Active Publication Date: 2015-03-11
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are many problems in the operation of GGH, especially clogging and scaling, which seriously affect the safe and stable operation of the desulfurization system. Almost all GGHs in wet desulfurization systems have more or less encountered scaling and clogging problems
Scaling and cleaning of GGH in wet flue gas desulfurization system is a difficult problem. Conventional cleaning agents have a very low removal rate of hard scale on GGH, and at the same time, they will cause great damage to the tiles on the surface of GGH, which will affect the heat transfer effect and increase the scaling rate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A descaling agent suitable for the flue gas reheater in the flue gas desulfurization system, including the following components: 30g of concentrated hydrochloric acid, 9g of urotropine, 5g of aniline, 2g of sodium fluoride, anionic surfactant LAS (alkane Sodium phenyl sulfonate) 1g, make up to 100g with water.

Embodiment 2

[0015] A descaling agent suitable for flue gas reheaters in flue gas desulfurization systems, comprising the following components: 40 g of concentrated hydrochloric acid, 8 g of urotropine, 4 g of aniline, 3 g of sodium fluoride, anionic surfactant AEC (alkane Sodium polyoxyethylene ether carboxylate) 1g, make up to 100g with water.

Embodiment 3

[0017] A descaling agent suitable for flue gas reheaters in flue gas desulfurization systems, comprising the following components: concentrated hydrochloric acid 45g, urotropine 8g, aniline 6g, sodium fluoride 2g, anionic surfactant NNO (sub- Sodium methyl bis-naphthalene sulfonate) 1g, make up to 100g with water.

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Abstract

The invention relates to a scale remover of a flue gas reheater in a flue gas desulfurization system. The scale remover comprises the components of, by weight, 30-45% of concentrated hydrochloric acid, 8-9% of urotropine, 4-6% of aniline, 2-3% of sodium fluoride, 1% of an anionic surfactant, and balance of water. The scale remover provided by the invention has good removing effect against GGH hard scales, and has the characteristics such as low environment pollution and high adaptability.

Description

technical field [0001] The invention relates to a descaling agent suitable for a flue gas reheater in a flue gas desulfurization system. Background technique [0002] With the rapid development of my country's economy and the improvement of economic strength, the national and local governments have increasingly stringent environmental protection requirements, and the implementation of flue gas desulfurization projects in coal-fired power plants has been rapidly carried out in China. Limestone-gypsum wet flue gas desulfurization process has become the preferred process for flue gas desulfurization of coal-fired power plants in my country. In order to increase the lifting height of the exhausted flue gas, a flue gas reheater (GGH) is often installed in the desulfurization system to increase the temperature of the net exhausted flue gas. [0003] There are many problems in the operation of GGH, especially blockage and scaling, which seriously affect the safe and stable operati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11D10/02
Inventor 杨杰陈二松姜运建常建刚
Owner STATE GRID CORP OF CHINA
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