共查询到19条相似文献,搜索用时 78 毫秒
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针对黑龙江石油化工厂甲乙酮装置丁烯提浓工段经常出现积液现象,导致操作不稳,产品的纯度下降和收率下降的问题,在工艺流程中使用消泡剂,收到了很好的效果。 相似文献
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介绍湿法磷酸生产中消除泡沫的方法及化学消泡剂的种类 ,简述国内湿法磷酸用消泡剂的开发应用情况 ,消泡剂性能的评价方法 ,并结合生产提出消泡方法的选择思路及减少泡沫生成的对策 相似文献
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张广文 《精细与专用化学品》1997,(12):12-15
一、前言 蒸煮工艺在造纸工艺流程过程中占着举足轻重的地位。目前,蒽醌虽然为众多纸厂所采用。但是蒸煮效果并不是十分理想,如成本较高,污染严重,特别是蒽醌毒性较大,对人体危害严重等。鉴于这种现状,道纯化工技术公司研制并生产出一种能完全代替蒽 相似文献
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纺织印染用消泡剂的制备应用和发展方向 总被引:2,自引:0,他引:2
消泡剂是纺织品加工过程中的一类重要的助剂。本文对消泡剂的品种、组分、制备和复配以及在印染上的应用和工艺进行了系统的论述,并对国内外产品应用情况进行了归纳和总结,结合目前国内市场经济,提出今后科研开发工作的建议。 相似文献
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造纸废水泡沫问题由来已久,泡沫不仅会影响到污水处理设施的运行,还会对环境造成污染。本文阐述了有机硅消泡剂的消泡原理以及用作消泡剂主体材料的二甲基硅油的特性。综合介绍了有机硅消泡剂的种类、组成以及性能特点,简述了有机消泡剂的发展趋势。 相似文献
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对焊接管道、传统卡套式管接头和无焊接管道优、缺点进行对比分析,并结合装置特点,在制浆车间液压装置管道系统中成功应用了无焊接管道,避免了焊接管道、传统卡套式管接头之不足。 相似文献
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涡凹气浮法在再生浆造纸废水处理中的应用 总被引:1,自引:0,他引:1
介绍了用涡凹气浮法处理再生浆造纸废水的工艺原理、技术特点、工艺流程和实践应用,再生浆造纸废水经该工艺处理后,出水水质达到造纸工业废水排放标准GWPB2-1999二级标准。工程实践表明该工艺具有设备集成度高,投资与占地面积少,运行效果稳定等优点,具有较高的推广价值。 相似文献
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纸浆造纸废水的综合治理 总被引:1,自引:0,他引:1
对纸浆造纸废水的综合治理措施进行了介绍.通过综合治理,造纸白水实现循环利用;纸浆造纸废水处理后出水水质达到<造纸工业水污染物排放标准>(GB 3544-2001)及国家环境保护局环发[2003]152号关于修订<造纸工业水污染物排放标准>的公告要求.该综合治理实践,为其他同类废水的处理,提供了有益的借鉴. 相似文献
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乳液型有机硅消泡剂SG的制备与性能 总被引:16,自引:0,他引:16
采用Span-Tween乳化体系及普通搅拌装置对硅油进行乳化,研制出的乳液型有机硅消泡剂SG具有良好的离心稳定性和静态稳定性,在室温下放置6个月后乳液不分层,性能不变;消泡剂SG在一定温度范围内(>20℃),消泡性能随温度的升高而增加,但温度升高到50℃以上时,消泡性能保持在一定水平;适应的pH值范围广,在pH值为1-14的水基体系中均可有效地消除泡沫。同其他几种相同价位的市售消泡剂相比,消泡剂SG生产工艺简单,成本低廉,具有更高的性能价格比。 相似文献
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Pooppana Antony Soloman Chiya Ahmed Basha Manickam Velan Natesan Balasubramanian 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》2009,84(9):1303-1313
BACKGROUND: Conventional biological waste‐water treatment techniques are insufficient to degrade large quantities of dissolved lignin discharged by small‐scale paper mills. The current investigation is aimed at comparing the overall performance of basic electrochemical reactor configurations such as batch, batch recirculation, recycle and single pass systems, in removing the organic part of waste‐water from a small‐scale, agro‐based paper industry. The effect of current density, supporting electrolyte concentration, duration of electrolysis, specific electrode surface and fluid flow rate on the removal of pollutants and energy consumption are critically evaluated. The improvement in biodegradability of the effluent during treatment is also noticed. RESULTS: The batch recirculation mode of operation was found to be superior in comparison with a batch system using the same specific electrode surface for both COD removal (73.3 vs. 64%) and capacity utilization (rate constant 1.112 × 10?3 vs. 1.049 × 10?3 cm s?1). The pollutant removal performance of the batch recirculation system improved considerably with increase in the circulation flow rate. At the best operating point in the recycle system, 59% of COD was removed, corresponding to a current efficiency of 68.9% and specific energy consumption of 18.46 kWh kg?1. The biodegradability index of the waste‐water was improved from 0.18 ± 0.01 to 0.36 ± 0.01. CONCLUSION: A recycle reactor was the best configuration, because of its flexibility of operation. Circulation flow rate and withdrawal flow rate enable the control of transfer coefficients and treatment duration respectively. Electrochemical treatment not only removes the bulk of the organic matter, but also makes the remaining pollutants more easily biodegradable. Copyright © 2009 Society of Chemical Industry 相似文献
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Four different end-of-pipe waste-treatment processes applicable to mechanical pulp and paper manufacture were modelled. Calculated costs for an average mill were capital $34–$44 million, operating cost $3.5–$6 million/year and discounted (10 years) $60–$85 million. Compared with mill reported values, capital and operating costs of activated sludge treatment (AST) were higher by 17 and 29%, respectively; those for aerated stabilization basin (ASB) were higher by 27 and 180%. Major variables affecting the costs were BOD and TSS levels and the wastewater-to-pulp ratio. It was concluded that ASB is more economical than AST and that anaerobic treatment plus AST could be advantageous at high BOD levels. 相似文献