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1976年11月至1980年8月,我们先后分四批共试制出石墨改性聚丙烯列管式换热器25台。其中换热面积小于9M~2(换热管为φ10×1毫米)有20台,换热面积在13-22M~2有5台。先后在10个工厂中应用。压力为常压或真空,温度为70～120℃,介质有盐酸、酒精及其它有机化合物,均为强腐蚀性或高纯度的物料。使用时间最长已达四年。现将有关情况介绍如下:
From November 1976 to August 1980, we successively produced 25 graphite-modified polypropylene tubular heat exchangers in four batches. The heat transfer area is less than 9M ~ 2 (heat transfer tube is φ10 × 1 mm) has 20 units, heat exchange area in 13-22M ~ 2 have 5 units. It has been used in 10 factories. Pressure is atmospheric or vacuum, the temperature is 70 ~ 120 ℃, the medium is hydrochloric acid, alcohol and other organic compounds, are highly corrosive or high purity materials. Up to four years of use. The relevant information is as follows: