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1.
氯化氢气体的吸收为盐酸合成重要的单元操作,本文从介绍了采用石墨降膜吸收器吸收HCI的工艺计算方法及设备选型中应注意的问题。  相似文献   

2.
<正>一种广泛应用于化工生产中节能减排的关健设备——高性能石墨降膜吸收器,日前在河北深州市天承石墨制品有限公司开发成功,并投放市场。当前,化工节能减排责任大、任务重,引起企  相似文献   

3.
本文通过研究氯化氢二级吸收强度不足的原因,找出塔不完全润湿是引起吸收强度不足的根源。并通过不同润湿率对膜式吸收强度的影响实验,总结出润湿率影响系数,使用润湿率影响系数校正吸收强度计算式,使计算膜式吸收强度符合实际。  相似文献   

4.
热管式降膜吸收器的传热传质   总被引:7,自引:0,他引:7  
对热管式降膜吸收顺溶液吸收传热传质并通过热管移出吸收热的过程进行了数值研究,根据所建立的数学模型,通过求解热管加热段外壁面溶液波动降膜的动态二维偏微分方程和热管传热方程,研究了膜雷诺数,低位余热温度,输出温度等因素对传热管质过程的影响,对进一步工作提出了新的见解。  相似文献   

5.
分析了以曼海姆法硫酸钾副产氯化氢为原料,采用传统的降膜吸收工艺生产盐酸过程中存在的不足之处,并提出了改进意见。  相似文献   

6.
石景祯  崔晓钰  徐之平  唐聪 《化工学报》2008,59(11):2756-2761
结合板式降膜技术与膜反转技术的优势,提出了一种新型膜反转板式降膜吸收器。设计并建立了膜反转板式降膜吸收试验台,在试验台上完成了不同吸收压力、溶液流量、进口温度、冷却条件等对膜反转板式降膜吸收器传热传质性能影响的系列实验研究,得到该吸收器的传热传质性能。为膜反转板式降膜热质传递设备的科学研究、工程设计和实际应用提供了一定依据,也为进一步开发高效紧凑的热质传递元件及设备提供了一些方法和思路。  相似文献   

7.
付勇 《上海化工》2014,(7):24-27
从布膜器设计和换热管换热面积计算的角度,提出了次氯酸钠生产装置中竖管降膜反应吸收器的设计方法,选用了相应的数学计算模型并给出了设计计算实例。  相似文献   

8.
根据石墨降膜吸收器结构特点,研究并提出了盐酸生产中降膜吸收器的设计方法和相应的数学模型,并给出了设计计算实例.  相似文献   

9.
《聚氯乙烯》2007,(5):F0004-F0004
公司主要产品: 浮头列管式石墨换热器(5-660m2) 管壳式石墨降膜吸收器(3-200m^2) 圆块式石墨换热器(5-800m^2)  相似文献   

10.
河北深州市天承石墨制品有限公司2011年8月中旬研发出高性能圆块式石墨降膜吸收器,其特点是抗压强度高、传热效果好、耐腐蚀性强。  相似文献   

11.
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   

12.
介绍了山梨酸生产过程中,聚酯酸性水解时对HC l的吸收生产工艺改造。分析原工艺设计的缺点和不足。在原基础上通过设备重新选型和工艺改造后,使盐酸的消耗由每吨山梨酸耗酸1.2 t降至0.25 t,使NaOH液用量由原来的0.70 t降为0 t,仅节约原料盐酸及NaOH液费用每年458.8万元。同时减少了废水中氯离子的排放,大大降低了生石灰用量,节约废水处理费用9.4万元。同时也大大降低了氯离子排放对环境的污染。  相似文献   

13.
介绍了原VCM合成气中过量HCI回收工艺流程及其存在的问题。采用了杭州中吴科技有限公司的盐酸解吸工艺与HCI组合吸收塔装置有机结合的工艺进行改进,改进后减少了占地面积,HCI回收率达99.9%,实现了盐酸循环利用。  相似文献   

14.
以Ce Cu K/Y为催化剂,提出了一种由流化床与多段绝热床串联的新型反应器用于HCl催化氧化过程。假设HCl年处理量为12万t/a,通过物料、能量、动量衡算建立反应器的数学模型,对HCl氧化工艺的操作参数进行优化。在不考虑床层压降的情况下,考察绝热床段数NAR及流化床出口HCl转化率xA,f对绝热床的最佳操作曲线和催化剂用量的影响。当NAR为3,xA,f为60%时,绝热床的最佳操作温度在380—430℃,满足了催化剂活性要求,催化剂总用量也较少。在考虑床层压降情况下,考察绝热床入口压强pin和内径Di对其催化剂用量WAR、床层压降Δp和床层高度Hi等的影响。综合反应器的操作难度及成本等因素,优选绝热床入口压强为500 k Pa,内径为1.6 m。在最佳操作条件下流化床和固定床所需催化剂分别为3.1 t和8.5 t。该研究为氯资源循环利用工业反应器的开发提供了理论依据。  相似文献   

15.
HCl介质中EDBDP对Q235钢的缓蚀性能研究   总被引:1,自引:0,他引:1  
采用失重法和电化学法研究了O,O′-(苯甲基)二硫代磷酸-N,N-二乙铵(EDBDP)在HCl介质中对Q235钢的缓蚀性能,两种方法共同验证了EDBDP是一种优良的缓蚀剂。失重法研究表明:25±1℃时,在5%HCl溶液中,当EDBDP浓度为120 mg/L时,缓蚀率高达99.07%;电化学研究结果表明:EDBDP受HCl浓度、温度和待测时间的影响较小,属于混合型缓蚀剂。吸附拟合表明:EDBDP在Q235钢表面的吸附符合Langmuir吸附等温式,属于几何覆盖效应下的单分子层物理吸附。  相似文献   

16.
The cover image is based on the Research Article Experimental and mathematical study of air gap membrane distillation for aqueous HCl azeotropic separation by Sarita Kalla et al., DOI: 10.1002/jctb.5766 .

  相似文献   


17.
以开发节能高效的新型提溴工艺为目的,设计了以中空纤维疏水膜作为布气装置的膜鼓气/吸收(MA-B/A)法连续吸收过程。压缩空气经过布气装置以微小气泡的形式分别进入串联的各级鼓气膜组件,与料液形成对流传质。空气流夹带料液中Br2所形成的空气/溴气混合气透过PVDF疏水膜组件的膜孔与吸收液反应,生成溴的化合物,实现对溴的连续吸收。考察了吸收池液位高度、吸收液流量、浓度、pH、温度、吸收段膜壁厚与组件结构等参数对膜吸收过程性能的影响。实验得到了MA-B/A法连续吸收过程的最佳参数条件。当膜丝厚度为0.15 mm,组件为海藻型,吸收池液位高度为1.5 m,流量为0.5 L?h-1,浓度为0.10 mol?L-1,pH为6~7,温度为70 ℃时,溴的脱除率为82.0%,回收率为76.3%,吸收率高达93.1%。  相似文献   

18.
洪梅  蔡媚剑 《上海化工》2013,(11):14-17
根据某工厂粗HCl净化能力的现状,运用Aspen模拟软件对比分析改造现有压缩机能力、增加氯苯脱除塔及直接深冷三种技改方案;根据工厂实际情况,确定采用直接深冷的方案并成功投入运行,与改造现有压缩机能力相比,节省投资约530万元。  相似文献   

19.
Porous combustors have been studied intensively concerning the combustion of natural gas. The advantages of combustion in porous inert media, such as low emissions, high power turndown ratio of typically 10:1 and compactness, can also be used for different chemical gas phase reactions, e.g. the HCl synthesis from H2 and Cl2. The advantages of porous reactors result from the heat transport properties of the porous medium, i.e. emissivity and conductivity. Heat transport mechanisms and chemical reactions were implemented in a numerical code in order to investigate the H2/Cl2 system. Important parameters of the reaction, e.g. the laminar flame speed and the adiabatic flame temperature, are higher for the H2/Cl2 reaction compared to the CH4/air combustion. By studying the influence of H2O and HCl as inert components it was shown by numerical investigations that the maximum temperature could be decreased to a level, which makes the usage of a porous reactor feasible. A porous reactor for laboratory use was tested with O2/CH4/N2 combustion, which delivers even higher adiabatic temperatures and flame speeds than the H2/Cl2 reaction. Finally, experiments with H2/Cl2/HCl reaction were carried out and first results are presented.  相似文献   

20.
In the titanium dioxide industry, there is a lack of a low-cost and high-efficiency treatment method for chloride containing tail gas. In this paper, the removal of HCl from the titanium dioxide industry by gas cyclone-liquid jet separator was studied, while Ca(OH)2, Na2CO3, NaOH solution, and water were used as absorbents. This paper investigated the influence of gas cyclone-liquid jet separator’s various process parameters on the removal rate of hydrogen chloride gas. The mechanism of mass transfer in the process of removing hydrogen chloride was discussed, and the effect and feasibility of HCl gas removal in the gas cyclone-liquid jet absorption separator were studied. The results showd that the removal efficiency of hydrogen chloride maintained above 95%, up to 99.9%, and the total mass transfer coefficient reached 0.28 mol·m-3·s-1·kPa-1. Under the same conditions, the absorption effect and total mass transfer coefficient of weak basic absorption liquid can be greatly improved by increasing the flow rate of absorption liquid, but the absorption effect and total mass transfer coefficient of strong alkaline absorption liquid can’t be improved obviously. The larger the inlet gas volume, the higher the gas concentration, the lower the absorption efficiency and the lower the total volumetric mass transfer coefficient.  相似文献   

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