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GOLDENSAIL
16
2022
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08
Use and maintenance of heat exchange equipment
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1. Routine maintenance of heat exchangers
In daily operation, special attention should be paid to preventing fluctuations in temperature and pressure. First, the pressure should be stable, and overpressure operation should never be allowed.
Second, the cleaning of the heat exchanger
After the heat exchange equipment has been operated for a long time, due to the corrosion, erosion, fouling, coking and other reasons of the medium, the inner and outer surfaces of the pipes have different degrees of fouling or even blockage. Therefore, it must be thoroughly cleaned during shutdown and maintenance. Common cleaning (sweeping) methods include wind sweeping, water washing, steam sweeping, chemical cleaning and mechanical cleaning.
However, this traditional cleaning method, such as mechanical methods (scraping, brushing), high-pressure water, chemical cleaning (pickling), etc., has many problems when cleaning equipment: it cannot completely remove deposits such as scale, and the acid solution causes corrosion to the equipment. There are loopholes, and the residual acid will cause secondary corrosion or under-scale corrosion to the material, which will eventually lead to the replacement of equipment. In addition, the cleaning waste liquid is toxic and requires a lot of money for waste water treatment.
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