共查询到20条相似文献,搜索用时 171 毫秒
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介绍了在原有的工艺基础上将换热设备降膜蒸发器作为一级吸收器,水喷射泵改为二级吸收器的尾气吸收工艺,从而可有效解决尾气(氯化氢气体)的吸收问题,并实现了回收利用。 相似文献
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亚磷酸是我厂的主要化工产品之一。在生产中所产生的尾气中主要含有氯化氢气体、夹带的亚磷酸和水份。原尾气处理装置工艺流程(见图1)为:尾气经二台并联的降膜吸收器吸收后,成为盐酸流入贮罐,剩余尾气经缓冲罐组吸收后排入下水道。吸收水(河水)经流量计控制计量后从降膜吸收器顶部进入。经多年的生产实践证明,该装置工艺上不尽合理,对尾气不能有效处理,已满足不了生产需要,存在的问题主要有以下几个方面。 相似文献
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河北宝硕集团有限公司(简称宝硕集团)原采用钢制合成炉生产氯化氢气体,从氯氢处理工序送来的氢气经氢气缓冲罐、阻火器.与来自氯氢处理工序的氯气经缓冲罐一起进入钢制合成炉内燃烧化合成氯化氢。氯化氢在空气冷却管内降温到120℃,送入石墨冷却器降温到30℃,进入一级降膜吸收器,与来自二级吸收器的稀酸并流吸收成为合格的盐酸;未被吸收的氯化氢气体从一级吸收器分气口出来,与来自尾气塔的稀酸并流进入二级吸收器的进气口,未被吸收的气体进入尾气塔进行吸收,不凝气经喷射泵后排空。 相似文献
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副产盐酸闭路循环吸收清洁生产工艺 总被引:1,自引:0,他引:1
叙述了传统的降膜吸收工艺应用于循环吸收生产副产盐酸的不足之处,并有针对性地设计新的清洁生产吸收工艺,解决了循环吸收尾气的工艺难点,取得了显著的经济和社会效益。 相似文献
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一.合成盐酸生产工艺沿革工业合成盐酸在国内已有60余年的生产历史,经过几代工程技术人员的努力,其工艺过程尤其是吸收部分发生了很大的变革。早期盐酸生产中吸收过程是在填料塔内完城的,由于是绝热吸收,吸收热不能及时移走,吸收率较低,尾气中含大量氯化氢,污染环境,腐蚀设备和设施。70年代初期,降膜吸收器问世,于是填料塔改为降膜塔,在列管内吸收液籍膜状旋流吸收氯化氢。同时,吸收热经δ=3mm厚的石墨 相似文献
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A nonstationary model of SO2 absorption from a gas phase to a countercurrent falling film of absorbing slurry was developed. Laminar, wavy and turbulent film structures were considered based on published information. Resistances to the mass transfer on the gas and the liquid sides of the interphase were considered, together with chemical reactions in the liquid phase. Relevant chemical equilibria in the liquid phase were modeled. Original experimental data on the neutralization reagent dissolution rate presented as a polydispersed two‐phase system of solids and on the rate of dissolved sulfite oxidation were used. The model was verified with experimental data from a laboratory‐scale falling‐film absorber using a single vertical tube under various geometrical and operating conditions, and a very good agreement was found with the experiment. Parametric sensitivity analysis showed the critical parts of the model. 相似文献
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Experimental measurements for the heat and mass transfer in laminar wavy film absorption with the presence of non-absorbables are presented. Water vapor was absorbed into a falling film of aqueous lithium chloride solution on a vertical tube with the air present in the gas phase acting as the non-absorbable whose concentration was accurately detected by a mass spectrometer gas analyzer. Although the depressing effect of the air on the absorption rate was much more significant in the low air concentration range, the absorption reduction rate with increasing air concentration was found to be lower than that reported previously. The reduction was found to be continuous even up to 30% of air content. Besides the non-absorbables, the effects of other operational parameters such as solution flow rate, inlet solution temperature, inlet solution concentration, absorber wall temperature, absorber water vapor pressure, and effective contact length on the absorption rate were also tested. These effects were shown to follow trends similar to those predicted by a numerical solution for smooth film absorption. The heat and mass transfer coefficients were correlated by using Reynolds number, Prandtl number, Schmidt number, capillary-buoyancy coefficient and air concentration. 相似文献
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根据船用条件下吸收器内溶液降膜吸收的特点,建立了摇摆状态下垂直管内TFE(2,2,2-trifluoroethanol,三氟乙醇)/NMP(N-methyl-2-pyrrolidone,甲基吡咯烷酮)降膜吸收过程中动量、热量和质量传递的物理和数学模型.模型中充分考虑了转动附加惯性力对降膜流场中液膜厚度、速度、温度和浓度分布的影响.采用膜内积分与全隐式有限容积相结合的数值方法求解理论模型.通过对计算结果的分析发现,在摇摆状态下TFE/NMP降膜吸收过程中,转动附加惯性力的存在使得速度和温度等状态参数的分布具有一定周期性和对称性. 相似文献
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Thermal storage systems, used, e.g., for domestic heating, must be able to compensate the mismatch between supply and demand. The most efficient techniques for thermal storage are based on sorption storage processes. Usually in sorption, the adsorption process occurs in combination with a solid state adsorbent, whereas absorption takes place in a liquid/gas system. During such sorption processes the flow behavior of the carrier medium is crucial for the efficiency of a falling film absorber. In this work the hydrodynamics of the falling liquid film in two geometrical setups, namely on an inclined plane and over two horizontal parallel tubes, is studied. For the simulation the Eulerian–Eulerian model of the software ANSYS CFX and the interFoam application of the open source software OpenFOAM were used. The numerical results of the two geometries were compared with each other and also with existing data from literature to predict the performance of a sorption storage regarding the specific wetted area and the needed height for gravity driven film absorption. 相似文献
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1600kt/a铜冶炼烟气制酸装置介绍 总被引:1,自引:0,他引:1
介绍了某有色冶炼项目1 600 kt/a硫酸装置的工艺流程、主要设备、设计特点及主要技术经济参数。制酸采用绝热蒸发、稀酸洗涤净化、预转化+"3+2"二转二吸工艺。尾气采用离子液吸附、解吸脱硫工艺,副产高浓度的SO2气体。装置充分合理利用低温位热能和高温位热能,循环水量和用电量明显降低,硫利用率达98.9%,尾气排放ρ(SO2)≤150 mg/m3。 相似文献