摘要：

针对修武化肥厂循环水系统因结垢导致传热效果降低的现象,选择先剥离黏泥,再采用废酸性冰母液在线清洗的方案对其进行综合处理,经分析清洗下来的钙垢量折合成CaCO₃垢量为4764kg,清洗下来的铁锈垢量折合成Fe₂O₃垢量为75kg,除垢率达到95%以上,洗净率达到90%以上,符合国家要求。清洗过程中监测到碳钢挂片腐蚀速率为1.4929g/(m².h),远低于行业标准的6g/(m².h),确保了装置的安全运行。

关键词: 循环冷却水系统, 化学清洗, 废酸性冰母液

Abstract:

Aiming at the phenomenon that the heat-transfer effect gets lower due to the scaling in the circulating water system in Xiuwu Fertilizer Plant,the sticky sludge must be stripped first,and then,acidic fluoride-containing wastewater from cryolite has been used for on-line cleaning,so as to carry on the integrated treatment process.The results show that the calcium cleaned down can be converted to 4 764 kg of CaCO₃ scale and the rust scale cleaned down can be converted to 75 g of Fe₂O₃ scale.The scale removing rate reaches 95% or over and cleaning rate reaches 90% or over.They meet the requirements of national standard.The corrosion rate of carbon steel hanging plate monitored in the process of cleaning is 1.492 9 g/(m²·h),much lower than the trade standard 6 g/(m²·h).Safe operation has thus been assured.

Key words: circulating cooling water systems, chemical cleaning, acidic fluoride-containing wastewater

中图分类号: 

• X703.1