Cleaning agent and cleaning process of GGH heat exchange component

Abstract

The invention provides a cleaning agent and a cleaning method of a GGH heat exchange component applying the same. The cleaning agent comprises alkaline cleaning solution and acidic cleaning solution, wherein the alkaline cleaning solution contains 1.6 weight percent to 11.0 weight percent (wt, same below) of alkali, 0.7 to 2.4 of penetrating agent, 1.2 to 3.5 of scale dissolver, 0.3 to 1.2 of surfactant, 0.2 to 1.3 of remover b and the balance of water; and the acidic cleaning solution contains 2.6 to 5.5 of strong acid, 0.7 to 2.4 of penetrating agent, 0.3 to 1.2 of latent solvent, 0.2 to 0.6 of inhibitor, 0.2 to 1.3 of remover a, and the balance of water. The washing process comprises an alkaline cleaning step, an acid cleaning step and a high-pressure water flushing step between the alkaline cleaning step and the acid cleaning step. The cleaning process and the cleaning agent of the GHH heat exchange component have the advantages of quick and thorough cleaning, low cost, environmental protection, and the like.

Description

technical field

[0001] The invention relates to a chemical cleaning agent and a cleaning process, in particular to a chemical cleaning agent and a cleaning process for heat exchange components of a flue gas-gas heat exchanger (GGH). Background technique

[0002] The flue gas in the desulfurization equipment GGH brings a large amount of gypsum slurry or soot from the desulfurization tower or the original flue gas. When encountering a wet rotor with a large amount of deposition on the surface of the heat transfer element, serious ash plugging will occur. In order to ensure normal production, it is necessary to clean the scale on the surface of the GGH heat exchange element and restore the flow channel of the flue gas in the GGH heat exchange element. For this reason, GGH is often equipped with a soot blower for daily purging, and high-pressure water is used as the dredging of the serious blockage of the rotor. However, this kind of high-pressure water washing during operation...

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