优化生产工艺 消除液氯生产和储存风险

Optimization of production process to eliminate risks in production and storage of liquid chlorine

陕西金泰氯碱化工有限公司的2套氯碱装置投产后,一线的氯化氢不能全部消耗,二线的氯化氢不能满足生产需要。为此,调换一线和二线的氯化氢总管,将一线3台合成炉生产的氯化氢送往二线装置,二线3台合成炉生产的氯化氢送往一线PVC装置。调换后,二线PVC产量可以增加0.71万t/a。将二线PVC精馏尾气中的氢气回收并人一线烧碱氢气系统,液氯产量同比降低26.81%,氢气也得到合理利用。同时,新增2×400m^3/h的电解水制氢装置,进一步解决液氯安全环保隐患,并提高PVC产能。通过不断地改造和优化运行方式,最终实现了装置正常生产时液氯零产量,降低了企业的安全环保风险。

Shaanxi Jintai Chlor A lkali Chemical Co.,Ltd.put two lines of chlor-alkali into operation.However,the first-line hydrogen chloride could not be consumed completely,and the output of the second-line hydrogen chloride could not meet the production needs.For this reason,the hydrogen chloride header pipe of the first line and that of the second line were exchanged.Thus,the hydrogen chloride produced by the three synthetic furnaces in the first line was sent to the second line unit,and the hydrogen chloride produced by the three synthetic furnaces in the second line was sent to the PVC units in the first line.The exchange increases the output of PVC in the second line by 7100 t/a.The hydrogen recovered from the tail gas of the second-line PVC rectification was fed into the hydrogen system of the first-line caustic soda unit,thus decreasing the liquid chlorine output by 26.81%per year and reasonably utilizing the hydrogen.At the same time,two sets of 400 m^3/h hydrogen generation unit by water electrolysis were built to further solve the hidden danger and environmental problems associated with liquid chlorine and to improve PVC production capacity.Through continuous transformation and optimization of operation mode,the aim of zero production of liquid chlorine in normal production of the plant is finally realized,which reduces the safety and environmental protection risk to the enterprise.