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氧氯化法生产二氯乙烷的废碱液回收利用 总被引:1,自引:1,他引:0
为消除氧氯化法生产二氟乙烷中产生的废碱液对系统水处理的影响,采用蒸馏法对废碱液进行单独处理,实现碱液中的二氯乙烷含量降低至1μg/g以下,满足废水处理要求.该改造工程投用后生产稳定,废碱液得到综合利用,具有良好的经济效益和环境效益. 相似文献
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介绍二氯乙烷精馏单元尾气回收改造情况,将二氯乙烷精馏单元尾气由洗涤放空改为进焚烧单元焚烧,改造后每年可节约390余万元,并减轻了环境污染,改善了大气环境。 相似文献
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Three different types of gas distributors were used in an external loop airlift slurry reactor to investigate the hydrodynamic characteristics. To predict the important hydrodynamic parameters, such as the total gas holdup, the slurry circulating velocity, the bubble size distribution, and the slip velocity between the gas phase and the slurry phase, the correlations are developed. The calculated results fit the experimental data very well. According to the influence of the solid holdup on the bubble size, the fluid flow in the reactor can be divided into two regimes, while a 10% value is regarded as the critical solid holdup value. When εs is≤10%, the bubble size is determined by both the gas phase and the slurry phase. When εs is ≥10%, the bubble size is determined mainly by the slurry phase. By analyzing the relationship between the slip velocity and the gas holdup, the bubble coalescence plays a key role in the slurry reactor. 相似文献
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