复配化学剂对加热炉阻垢效果研究

Research on heating furnace scale formation prevented by compound chemical agent

动力站加热炉运行的是污水沉降罐出来的污水,加热后在炉管内壁生成大量的水垢,造成换热效率下降,加热炉出口温度降低,不能满足生产需求。针对这种情况,开展了加热炉阻垢现场试验。通过对加热炉垢质、污水水质化验分析,确定由PBTCA、HPMA按1∶2复配阻垢剂,通过加药泵将阻垢剂加入到掺水系统中,进行掺水系统阻垢试验。试验表明,结垢速率降低了89%,加热炉效率提高了6%,阻垢试验有效地延缓了结垢速率,提高了加热炉换热效率。

The water for running of heating furnace is sewage water from sewage sedimentation tank.A lot of scale can be generated easily in furnace tube wall after heating. It can result in reducing the heat transfer efficiency and the outlet temperature of heating furnace and can not meet the production needs. For this situation,the furnace scale field trials were carried out. Through the laboratory analysis on the furnace scale,the sewage water quality,the complex inhibitor is determined by PBTCA and HPMA according to the proportion of 1∶2.The scale tests of water mixing system were carried by using the dosing pump to add the inhibitor into watered system. Tests show that fouling rate decreases by 89% and the furnace efficiency is improved by 6%.The fouling rate can be deferred effectively and the efficiency of the furnace heat exchanger has been improved by scale test.