粗苯设备腐蚀介质来源及其性质的研究

The Study on the Origin and Nature of Corrosive Substances on Crude Benzol Plants

本文指出粗苯设备腐蚀介质主要来自煤气中的ＮＨ＿３、Ｈ＿２Ｓ、ＨＣＮ；洗油中的水溶性无机盐及喹啉硷，无机盐ＮＨ＿４ＣＮＳ、ＮＨ＿４ＣＮ、ＮＨ＿４Ｃｌ及喹啉硷盐具有较强的腐蚀性。洗油中的沥青质与ＮＨ＿４ＣＮＳ、ＮＨ＿４ＣＮ、ＮＨ＿４Ｃｌ缔合形成稳定性的腐蚀物，它们将加速粗苯设备的腐蚀，ＮＨ＿４ＣＮＳ是煤气中ＮＨ＿３与ＨＣＮ、Ｈ＿２Ｓ或ＮＨ＿３与富油中ＣＳ＿２的反应产物，减少煤气与洗油中腐蚀介质的含量，可降低粗苯设备的腐蚀。

This paper points that main source of corrosive substances is NH_3 ,H_2S,HCN in the gas and inorganic soluble salts and quinoline in the washing oil,NH_4CNS,NH_4CN,NH_4Cl and quinoline salts have stronge corrosivity. The asphaltene and NH_4CNS,NH_4CN,NH_4Cl can form the stabilized corrsive substances which will quickly corrode crude benzol plants,NH_4CNS is formed from NH_3 and HCN,H_2S in the gas or CS_2 in the rich oil.To decrease amounts of corrosive substances in gas and washing oil may reduce corrosion on crud benzol plants.