Scale remover of flue gas reheater in flue gas desulfurization system

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...

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.