Research and application of composite cleaning technology for heat exchanger in conversion process of sulphuric acid plant
The tube and shell sides of the shell and tube heat exchanger in the conversion process of a lead-zinc smelting flue gas acid production unit of a certain company are blocked by acidic sludge like dirt.The pressure drop of the tube and shell sides continued to increase,and the overall heat transfer coefficient of the heat exchanger decreased,resulting in poor heat transfer efficiency and gradually increasing power consumption.This article introduces the steps,technical requirements and precautions of the company's use of composite cleaning technology to clean clogged heat exchanger tube and shell sides.After cleaning,the pressure drop of the heat exchanger tube and shell sides is reduced,the heat transfer efficiency is improved,the natural balance of the conversion system is promoted and the power consumption is reduced.
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