| Alkaline residue treatment unit is an important producing unit for environment protection in petrochemical works. During the daily processing, the pipeline of this unit is full of strong corrosive. So it takes place often that the unit shuts down for the leaking of the corroded pipeline. Although many kinds of anticorrosive measure are taken , the result is not notable.In this paper, we analyze the constituent of corrosive in alkaline residue treatment unit, the corrosion mechanism and the taken measures. We study the structure and function of glass fiber reinforced polypropylene (FRPP) plastics. By the research and trial run the FRPP pipeline, we think that the pipeline has good anticorrosive function, comprehensive utilization and high adaptability to the processing condition of the unit. Inner plastics (FRPP) clad steel tube not only meets the need against corrosion, but also has the high intensity and the function of ageing-resistant and temperature-resistant. It is easy to fix and operate and reasonable in economy for the tube. The application of this tube in louyang petrochemical complex alkaline residue treatment unit proves that it can replace stainless steel tube and can be used wind-ranging in the acid water system of the unit.Of course, in the processing of application of FRPP tube (also inner plastics clad steel tube ) has some problems, such as temperature-resistant is not enough. These problems cause some difficulties in industrial processing and control. Scientific research personnel are required to research the high grade tube to meet the needs.The glass fiber reinforced polypropylene plastics tube we used in alkaline residue treatment unit guarantee the processing safe and steady. It brings us great economy benefits and beautifies our surroundings better. The goal of changing waste to treasure for environment protection unit is realized. Our study will also supply useful experience to the same domestic unit.
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