关键词: 压缩机, 换热器, 传热, 表面活性剂, 超声清洗, 清洗剂

Abstract: In the operation and maintenance of ammonia synthesis process with semi-water gas,coking problem of a Guizhou company's compressor heat exchanger is one of the most prominent and urgent problem. Coking not only caused the heat transfer efficiency decrease,increased the resistance,reduced compression ratio,but also seriously affected the normal operation of production. This paper aimed at the compression section of synthetic ammonia coking phenomenon of a Guizhou company. Based on coking mechanism and composition,ultrasonic cleaning method was used. OP-10,sodium dodecyl sulfate were selected as leaning agent. Sodium hydroxide was selected as co-cleaning agent. Optimum composition and concentration of ultrasonic cleaning agent,cleaning temperature and cleaning ability were studied. Experimental results showed that the composition of the cleaning agent is 60g/L OP-10 emulsifier,50g/L sodium dodecyl sulfonate,3g/L sodium hydroxide with the volume ratio of 1∶2∶2. When the ultrasonic cleaning was performed at 50℃,the cleaning result was the best.

Key words: compressor, heat exchanger, heat transfer, surfactants, ultrasonic cleaning, cleaning agent