Abstract: Introduces a kind of compound ferrous sulfide cleaner, the principle to use the coordination reaction and oxidation and reduction reaction to the ferrous sulfide removal equipment. Respectively in different complex agent and oxidant ferrous sulfide removal, according to the result of single factor experiments, chose the sodium pyrophosphate and sodium hypochlorite as the main composition of cleaning agent, use the orthogonal experiment to investigate the concentration of sodium hypochlorite, sodium pyrophosphate mass, cleaning time and cleaning temperature effect on the clearance of ferrous sulfide. The experimental results show that when the concentration of sodium hypochlorite is 0.003 mol/L, sodium pyrophosphate mass is 1.5 g, cleaning temperature is 80 ℃ and the time is 12 h, the clearance rate of ferrous sulfide is highest, at 75.0%.

Key words: Ferrous sulfide, Complexing reaction, Oxidation and eduction reaction, Spontaneous combustion.

摘要： 介绍了一种复合型FeS清洗剂的研制，其原理为利用配位反应和氧化还原反应来清除设备中的FeS。分别对不同的配位剂和氧化剂的FeS清除效果进行了考察，根据单因素实验结果，选择焦磷酸钠和次氯酸钠作为清洗剂的主要成分，利用正交实验考察了次氯酸钠浓度、焦磷酸钠质量、清洗时间及清洗温度对FeS清除率的影响。结果表明，当次氯酸钠浓度为0.003 mol/L、焦磷酸钠质量为1.5 g、清洗温度为80 ℃和清洗时间为12 h时，FeS的清除率最高，为75.0%。

关键词: FeS清洗剂, 配位反应, 氧化还原反应, 自燃