共查询到18条相似文献,搜索用时 62 毫秒
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组合氯化氢吸收塔净化技术的应用 总被引:2,自引:0,他引:2
分析了聚氯乙烯厂电石法生产PVC原有水洗装置存在的问题与不足。详细阐述了水洗碱洗净化装置的原理及组合塔新技术的特点和改进后的效果。 相似文献
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近年来,报导氯化氢吸收塔爆炸的事例常见,究其原因除人为操作因素外,尚有设备和工艺因素,针对用炸原因,采取切实可行的预防措施以杜绝爆炸事故。且在安装配管时,氯化氢的进出口管尽可能的安装在吸收塔的两头正面,避免死角的产生以减少氢气的富集。2水流泵的尾气管必须保持为水平直管,且具有一定的抽吸力,确保畅通地排除尾气。3选用传热传质效率高的块孔式石墨降膜法吸收器,可以将反应热及时导出,且结构强度大,一般轻微地爆炸及短暂的停水都不会造成损失。;4吸收塔选用既能耐酸又能耐温脆性又良好的石墨板作防爆膜较适宜,其爆… 相似文献
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Shoushi Bo Xuehu Ma Zhong Lan Jiabin Chen Hongxia Chen 《Chemical engineering journal (Lausanne, Switzerland : 1996)》2010,156(3):607-612
Falling liquid film is commonly employed in variety of industrial systems, such as LiBr/H2O absorption heat pump or chiller. In this paper, the falling film absorption in aqueous lithium bromide solution was investigated numerically using CFD software package-Fluent. The practical convective boundary condition at the cooling water side was considered. The heat transfer coefficient is assumed constant, and the coolant temperature changes linearly along its flow path. The numerical results indicate that the profile of temperature is exponential and their gradients are high due to the distinct heat effect associated with the absorption at the interface and the cooling effect of coolant at the wall at small downstream distance. As the downstream distance increases, the profile of temperature is nearly linear. The absorption heat and mass fluxes reach a maximum at the inlet region and decrease at the outside of the inlet region. Specially, the effect of variable physical properties on the absorption process was considered and discussed. The prediction of the total absorption mass transfer rate is about 6.5% higher when assuming constant properties. 相似文献
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E. Klemm G. Mathivanan T. SchwarzS. Schirrmeister 《Chemical Engineering and Processing: Process Intensification》2011,50(10):1010-1016
A microstructured falling film evaporator made out of AlMg3 was used to evaporate a 50 wt.% aqueous hydrogen peroxide solution. Sufficient wetting with contact angles lower than 20° and a stable falling film was reached by a sealing procedure at elevated temperatures (about 100 °C). After a self-passivation procedure under operation conditions the relative decomposition related to the evaporated amount could be reduced to values of about 10%. From the experimental results it was concluded that the decomposition occurs mainly in the liquid phase during evaporation and not in the vapour phase by contacting the non-wetted surfaces of the evaporator and pipes. At an operation temperature of 130 °C 10 vol.% of hydrogen peroxide in the vapour could be reached which almost corresponds to the vapour/liquid equilibrium at the top of the evaporator. 相似文献
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叙述了正压式二合一石墨合成炉产酸与直供氯化氢气体的可换性工艺及优点,阐述了新型正压式二合一石墨合成炉炉体材质,快速传热等专利技术。 相似文献