共查询到20条相似文献,搜索用时 15 毫秒
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介绍在尿素蒸发系统应用尿素洗涤回收塔,降低解吸废液中的尿素含量,回收大部分尿素,取得了环保和经济双重效益。 相似文献
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合成杀螨剂哒螨酮原粉之后留下的滤液,在脱去溶剂甲醇得到的残余物,经过处理得到哒螨酮苯油,再进一步加工可配制复配杀螨剂-柴油哒螨酮乳油。其杀虫活性与15%哒螨酮乳油相当,既避免了环境污染,又产生经济效益,本文将探讨这种回收利用方法。 相似文献
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钢铁酸洗废液的回收利用研究 总被引:4,自引:0,他引:4
采用直接通空气法与直接通氯气法,将Fe^2 氧化为Fe^3 探讨了最佳转化条件,认定以pH值5.5、温度80℃、常压下通空气22h直接氧化为可行,并试制出产品铁红粉,回收率为77%。 相似文献
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在停车过程中,会有大量含氨和尿素的废液产生,不但对环境造成严重影响,而且造成氨和尿素的流失,使生产成本提高。投用新增废液回收系统后,部分回收处理了含氨和尿素废液,经济和环境效益显著。 相似文献
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介绍了尿素深度水解废液中总氮含量的中和容量法测定,与纳氏比色法和水杨酸-次氯酸盐比色法比较,具有操作简单,分析迅速准确的优点.与传统方法相比,标准偏差小,标样回收率在98%以上,是测定解吸废液氮含量的良好方法. 相似文献
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《分离科学与技术》2012,47(12):1867-1871
Solvent extraction studies have been carried out for the recovery of cyclohexanecarboxylic acid (CCA) from simulated waste fluid. Influences of various parameters including extractant types, pH of the solution, equilibration time, and initial concentrations of CCA, etc., were studied. A mixture of toluene and 1-octanol (90:10, v/v) was found suitable for the extraction. The results showed that solution pH had a great effect on the distribution ratio, and CCA could be efficiently extracted when the pH was lower than 3.5. The extraction was found quite rapidly. The distribution ratio decreased as the initial concentration of CCA increased. The stripping rate of CCA using sodium hydroxide as stripping agent was found to be increased with the increase of alkali concentration. After back extraction once, more than 98% stripping efficiency was achieved with 0.8 mol/L sodium hydroxide solution at aqueous to organic phase (A/O) ratio 1:1 when CCA concentration was lower than 38.3 g/L. The practical extraction process was carried out for the waste fluid (concentration of CCA 36.5 g/L) discharged in the production of caprolactam from toluene. After four extraction stages at A/O ratio 1:1, the cumulative extraction recovery reached 99.3%. The practical stripping efficiency from loaded organic phase reached 98.2% in one single stage. 相似文献
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阿奇霉素废水的预处理 总被引:3,自引:0,他引:3
针对阿奇霉素废水高COD、高氨氮浓度、高色度以及高含盐量的特点,采用吹脱-铁炭微电解-Fenton氧化预处理阿奇霉素废水,效果良好。试验结果表明:吹脱pH值为11~12、吹脱时间20 h时,氨氮去除率达到80%;铁炭微电解pH值为3~4、铁炭比为1.5、反应时间为80 min时,COD去除率达到45%;向微电解出水投加30 mL/L的H2O2(质量分数为30%)进行Fenton氧化处理,COD去除率提高到89.6%。预处理后,废水的BOD5/COD从0.18提高到0.3,提高了废水的可生化性。 相似文献
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李爱仙 《硫磷设计与粉体工程》2004,(2):30-33
炼油厂常减压装置、尤里卡装置和延迟焦化装置等产生的大量含H2S酸性废水都采用汽提工艺回收H2S和氨。介绍了单塔汽提工艺和双塔汽提工艺各自的特点,阐述了单塔汽提工艺流程、主要设备的工艺参数和结构,指出单塔汽提工艺的能耗低,可获得合格的净化水。 相似文献
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为确保总排污水在2000年达标排放,对汽提装置相继进行两次改造,增设脱碳废水回收系统,将脱碳废水送往C9201汽提回收。实现了工艺冷凝液和脱碳废水中的水和氨的回收,并增加了热量的回收,经济效益显著。 相似文献
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《分离科学与技术》2012,47(12):2797-2805
Abstract Orange waste was crosslinked with sulfuric acid to immobilize the hesperetin-like molecule. Au(III) was selectively recovered from hydrochloric acid, exhibiting the negligible affinity to other precious metals and base metal ions. The isotherm demonstrated that the maximum loading capacity on the crosslinked orange waste is approximately 10 mol/kg, suggesting that orange waste has a high possibility for commercial application for gold recovery. 相似文献
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