The choice of plate heat exchanger cleaning agent, pickling is currently the main way, it includes organic acids and inorganic acids. Organic acids mainly include oxalic acid and formic acid. Inorganic acids are mainly: hydrochloric acid, nitric acid and so on. According to plate heat exchanger fouling and process, material and scale composition analysis:
1. The plate heat exchanger is made of nickel-titanium alloy. The use of hydrochloric acid as a cleaning liquid makes it easy for the plate heat exchanger plates to produce strong corrosion and shorten the service life of the plate heat exchanger.
2. The plate heat exchanger has a small flow area and a complex internal structure. If the cleaning liquid is precipitated, it is difficult to discharge.
Through repeated tests, it was found that formic acid was selected as the best cleaning solution for plate heat exchangers. Adding buffer and surfactant to the formic acid cleaning solution will have better cleaning effect and reduce the corrosion of the plate heat exchanger plate by the cleaning solution.
Chemical tests on scale samples in plate heat exchangers have shown that formic acid can effectively remove scale. Through the acid immersion test, it was found that formic acid can effectively remove the scale attached to the plate heat exchanger plate, and at the same time, it has little effect on the corrosion of the plate heat exchanger plate.
Henan Longpa Energy Conservation & Environmental Protection Co., Ltd. specializes in the production of heat exchangers. The heat exchangers mainly include plate heat exchangers, heat exchangers, etc. The design, production, sales, installation, commissioning, application and contracting of environmental protection projects are a kind of heat exchangers. Environmental company.
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