共查询到20条相似文献,搜索用时 171 毫秒
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设计涂装前表面处理的水洗系统时,首先考虑的是水洗后工件表面的洁净度,它是保证表面处理质量的一个重要环节。在涂装前表面处理过程中,由于对工件的要求不同,以及所用化学药品和设备的差异,处理工艺路线变化多端。目前大多数钢铁件的喷淋式涂装前表面处理工艺路线为: 相似文献
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环氧蛹油增塑剂的生产 总被引:1,自引:0,他引:1
以蚕蛹油、甲酸、双氧水为原料,经蛹油精制、环氧化、碱洗、水洗、脱水、热稳定处理工艺过程,可制备质量较高的环氧蛹油增塑剂,该产品有着较好的经济效益及社会效益。 相似文献
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冷却水处理不停车清洗、预膜新工艺工业放大报告 总被引:2,自引:0,他引:2
一、前言在冷却水化学处理工艺中需采用加入成膜缓蚀剂来防止腐蚀,为使设备表面迅速生成防腐膜,一般是在正常运转前加大药剂用量进行基础处理,称为预膜。为了使膜能牢固地附着在金属表面,就要先清除设备表面脏物。因此,冷却水化学处理工艺过程分清洗、预膜、正常运转三个阶段。清洗的作用是使设备表面清洁,以保证预膜质量,同时有利于提高换热效率。预膜的主要作用是迅速在金属表面形成防腐蚀膜,保护设备免受腐蚀。正常运转主要是维护防腐蚀膜的完整,同时要防止结垢与积污。系统清洗、预膜是冷却水化学处理中十分重要的环节。 相似文献
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金属表面硅烷处理技术 总被引:6,自引:1,他引:6
根据金属腐蚀及涂层防腐原理,研究了金属表面硅烷处理工艺技术及处理后的功能特性,分别进行了中性盐雾、铜加速醋酸盐雾、电偶腐蚀、大气暴露和海水浸泡试验。结果表明,金属表面硅烷处理工艺技术可以取代涂装前磷化及铬化处理。该技术具有常温处理、无毒性无污染的特点,可广泛应用于涂装前处理与防腐领域。 相似文献
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100kt/a硫酸装置水洗净化的污水处理 总被引:1,自引:0,他引:1
硫酸装置水净化工艺的污水处理,若单纯用石灰乳中和大都会出现超标排放、污染环境,采用两次中和、两次絮凝沉降、一次真空过滤、一次冷却降温工艺处理水洗净化的污水,实现了封闭循环,达到了零排放 。介绍该污水处理的工艺原理、反应机理、工艺流程和设备与管道的选用,分析了经济效益,经环境监测部门监测,治理效果显著,为硫酸装置水洗净化的污水处理开创了一条有效的治污途径。 相似文献
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介绍一套小型硫铁矿制酸装置扩建改造的设计特点。装置产能由60kt/a增加到80kt/a,净化工序由水洗净化工艺改为稀酸洗净化工艺。净化工序使用了下段为泡沫板、上段为填料床的组合式洗涤设备泡填塔,具有投资省和效率高的优点。预期改造投资回收期为4.5年,经济效益和环境效益良好。 相似文献
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A. G. Charleston 《Nutrient Cycling in Agroecosystems》1987,12(1):67-84
The gaseous fluoride evolved during the production of single superphosphates may be disposed of by scrubbing it from the effluent gas streams with water sprays and using the resulting scrubber liquors as sources of dilution water for the concentrated sulphuric acid used in the superphosphate manufacturing processes.Part of the returned fluoride is re-evolved which leads to higher fluoride loadings on the scrubbing systems which must therefore be relatively large and expensive installations. Accurate initial design is thus important to minimise the costs involved.This paper presents a theoretical model of such a zero effluent discharge system which will aid in this process. Parameters covered include the temperatures of the gases and liquids within the scrubbing system, the amount of fluoride re-evolved from the superphosphate and the vapour pressures of fluoride over the scrubber liquors.The effects of increasing the number of scrubbing stages while keeping the total number of transfer units constant and varying the air flows within scrubbing systems have been calculated and the results are presented. 相似文献
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锅炉的水质管理及水处理是保证锅炉安全、经济运行的重要措施之一。当锅炉给水不良,尤其是给水中存在硬度物质,又末进行合适的水处理时,在锅炉内壁上会形成水垢,不仅影响传热,浪费燃料,甚至引起爆管,堵塞管道。因此搞好水处理,对保障锅炉安全、高效经济运行是至关重要的,本文通过对各种软化和除碱流程的分析,给出了针对不同原水水质应采取的化学水处理流程。 相似文献
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利用顺丁烯二酸酐生产过程中副产的蒸汽对产生的洗锅废水进行蒸馏、中和处理,降低了洗锅废水中污染物浓度,使废水达到可进一步处理的工艺要求。 相似文献
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Development of a Model for Water Scrubbing‐Based Biogas Upgrading and Biomethane Compression
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Karim Ghaib 《化学工程与技术》2017,40(10):1817-1825
Biomethane is an easily storable, renewable energy source that is applicable to the sectors electricity, heat, and transport. It is mostly obtained from biogas by different upgrading technologies. At present, the most common technology is water scrubbing because of its reliability and simplicity. A methodology for designing as well as for evaluating and optimizing water scrubbing plants including biomethane compression is introduced. To demonstrate possible applications of this methodology, a zero‐emission water scrubbing process characterized by under‐pressure regeneration of washing water is modeled and investigated by a sensitivity analysis. 相似文献
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A. Athanassiadis 《Journal of the American Oil Chemists' Society》1982,59(12):554-557
This new scrubbing system has been developed to eliminate entirely air pollution caused by water cooling towers during oil
or fat deodorization. It also minimizes water effluent. In industrial application for more than one year, this system is based
on the action of two scrubbers placed in series. The first scrubber is a conventional one, whereas the second uses concentrated
cooled brine circulating in closed circuit as the condensing medium. A thorough purification of water vapors is thus achieved
before the volatiles from the deodorizer enter into the high vacuum bosters. As a practical result of this special scrubbing
process, the condensing water of the barometric condensers can be entirely recycled and this water is cooled by means of clean
water in a surface heat exchanger requiring minimum maintenance for cleaning.
Presented at the AOCS annual meeting, Toronto, May 1982. 相似文献
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在实验室,采用SBR生化反应器,分别研究了经空气吹脱预处理和未经预处理的新型气化炉煤气洗涤废水经驯化建立的生态系统脱除氨态氮和COD以及脱氮模式的区别,得出以下结论:新型气化炉煤气洗涤废水可采用短程亚硝化型硝化形式直接进行生化处理。 相似文献
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二氧化氯在水处理中对有机物的去除研究 总被引:1,自引:0,他引:1
以地表水为水源的玫出水为研究对象,探讨以二氧化氮为消毒剂对饮用水中总有机碳和四氯化碳及三氯甲烷的去除效果。结果表明二氧化氮为消毒剂不会引起出厂水中四氯化碳及三氯甲烷的增加。对出厂水中总有机碳也有一定的去除能力,是获得优质饮用水的有效给水处理工艺。 相似文献