浅谈涂装车间蒸汽冷凝水回收再利用

介绍了涂装车间中央空调结构与能耗,指出中央空调蒸汽加热段的产出物是蒸汽冷凝水,讨论了中央空调蒸汽冷凝水回收再利用的方案及措施。     

铵基循环碳酸化固定CO2

引言由煤等化石燃料燃烧产生的温室气体CO2的捕集与封存已引起国际社会的广泛关注[1-2];其中,模仿自然界钙镁硅酸盐矿物风化过程的碳酸化固定是实现大规模封存CO2的重要途径,与其他封存技术相比,碳酸化固定CO2环境风险性小,并可     

中国特色水溶液全循环法尿素工艺节能降耗技术剖析

采用我国自行开发的尿素合成塔塔板和等温型内件、预分离-预蒸馏工艺流程,形成了具有中国特色的水溶液全循环法尿素工艺。分析了采用新型尿素合成塔塔板和等温内件对提高尿素合成塔转化率、降低一段分解加热器汽耗的作用,介绍了中压段多回收反应热能的Q-1100工艺以及水溶液全循环工艺装置中进一步降低汽耗的潜力。     

浅淡循环流化床锅炉返料装置的运行与调节

根据氯碱生产企业对热负荷调节的特点及要求,分析循环流化床锅炉返料系统的原理及在锅炉运行中的常见故障,并提出相应的解决方法。     

变压吸附技术在PVC行业的应用与发展

介绍了变压吸附（PSA）技术处理精馏尾气,取得了满意的回收和净化效果;着重阐述了变压吸附工艺、基本原理和在化工行业的应用与发展。     

采用高低温二段蓄热技术使玻璃熔窑真正节能减排

介绍并分析了国内玻璃熔窑的能耗及热效率情况,指出常规的熔窑烟气余热利用并不是真正意义上的节能减排措施,提出采用高低温二段蓄热技术,可使玻璃熔窑真正节能减排,并详细介绍了加高格子体、加设低温蓄热室和旋转蓄热室等具体方法。     

氯乙烯聚合清洁生产措施

通过对聚合工序未反应气体进行回收处理和对聚合过程产生的废水进行再利用,达到清洁生产的目的。     

利乐包回收利用研究进展

随着市场需求和包装技术的发展,利乐包在世界范围内得到了广泛的发展。利乐包中含有优质的木质纤维、塑料和金属铝。如果不加以回收利用,会对环境造成污染的同时,造成大量的资源浪费。在提倡可持续发展的今天,各国更加重视研究利乐包回收利用的新技术。该文重点介绍了国内外对利乐包的再生利用工艺及分析。     

利用两级UASB消化处理实现木薯燃料乙醇的水循环型生产

Considering limited success in target-hitting discharge from alcohol industry, our attention was directed toward a recycling use of distillery spentwash (DS) in cassava bioethanol production by using a two-stage up-flow anaerobic sludge blanket bioremediation (TS-UASBB). With the TS-UASBB, , COD, N and P in the effluent from the DS degraded significantly and their concentrations were kept at 0.2 g•L1, 2.0 g•L1, 1.0 g•L1 and 15 mg•L1, respectively, in 13 batch processes for water-recycled ethanol fermentation. With the effluent used directly as dilution water, no heat-resistant bacteria were found alive. The thirteen-batch ethanol production individually achieved 10% after 48 h fermentation. The starch utilization ratio and total sugar consumption were 90% and 99.5%, respectively. The novel water-recycled bioethanol production process with ethanol fermentation and TS-UASBB has a considerable potential in other starchy and cellulosic ethanol production.     

Evaluation of the parameters affecting nitrogen and phosphorus removal in anaerobic/anoxic/oxic (A/A/O) biological nutrient removal systems

Considerable research has been performed on biological nutrient removal (BNR) systems which remove the problematic nutrients, nitrogen and phosphorus, that cause eutrophication. This research focussed on setting up two laboratory‐scale anaerobic/anoxic/oxic (A/A/O) systems and investigating their reliability while undergoing various parameter changes. Pump failure, in the first trial, R1, led to a decrease in pH, exposure of the sludge to relatively low nitrate concentrations and reduction of the suspended solids concentration within the system. This adversely affected the phosphorus removal efficiency. Shock loading the system with increased influent phosphate concentrations for 56 days was shown to aid remediation of the phosphorus removal efficiency to values between 65 and 70% (w/w). The second trial, R2, highlighted the presence of bacteria capable of P‐uptake under anoxic conditions (in the presence of nitrate). The characteristic anaerobic P‐release was also evident. The bacteria responsible for phosphate uptake under anoxic conditions are thought to be the denitrifying phosphate removing bacteria (DPB). However, the presence of higher nitrate concentrations retarded the P‐removal efficiency to some extent. Secondary release of P was evident in the clarifier of the A/A/O system during the R2 trial and especially during times of increased nitrate concentrations in the system. Between 20 and 40% (w/w) of the P taken up in the oxic stage of the system was released in the clarifier at various stages throughout the trial. © 2000 Society of Chemical Industry