水洗净化PPS树脂的工艺经济可行，在要求较高时，可采取酸洗等方式提高纯度。
It is feasible economically to purify PPS resin by water-washing. When high quality is required, the resin can be purified by an acid-washing.
就硫酸生产酸洗净化系统中使用的斜管沉降器，对其结构设计中存在的问题进行了改造，其中包括结构和衬里防腐的改进。
Against the design defects, modification is made on inclined tube settler in the purifying system of SA production, including settler structure and lining anticorrosion.
对文泡间电酸洗净化工艺在西宁地区的循环回路、工艺参数及净化效率进行了探讨。
This article discusses the operation parameters and cleaning effect of VFEA craft' s cycle circuit in Xining region.
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