某金属表面处理厂废水处理方案调查与分析

发布时间：2018-02-09 08:17

本文关键词： 金属表面处理废水处理发展现状清洁生产　出处：《武汉工程大学》2015年硕士论文　论文类型：学位论文

【摘要】：金属表面处理技术普遍适用于各个行业,是品控把关的重要技术工艺,同时,也是除造纸外最大的工业污染行业,由于在金属表面处理工业过程中,使用了大量的酸、碱水溶液与含重金属的溶液,甚至含有镉、氰化物、铬酸盐等毒害性较强的化学品,产生了大量的有毒、有害气体、固体、液体污染物.因此,研究金属表面科学,从而探索绿色工艺,对经济建设、社会进步以及人类生存有着十分重大的意义.本课题对惠州某金属表面处理厂生产工艺及废水处理设备、流程进行了调查研究,发现其污染主要来自于生产工艺中机械抛光过程产生的粉尘、废铝粉、噪声,除油过程产生的固体废物,化学抛光产生的酸气,以及各清洗过程中的酸碱废水等,其中酸碱废水为主要污染废水,污染物主要为酸碱类(pH)、SS、石油类、重铬酸盐、NH3-N、烷基苯磺酸盐.其废水处理工艺流程为：废水→调节池→诱导反应池→一级反应池→二级反应池→一级沉淀池→三级反应池→二级沉淀池→pH调整池→水解酸化池→A/A/O反应→二次沉淀池→清水池→达标排放或回用.经一系列处理后,惠州某金属表面处理厂所排放废水符合国家污染物最高允许排放浓度,项目废水经处理设施处理后所有监测项目的浓度均低于广东省《水污染物排放限值》(DB44/26-2001)(第二时段)的一级标准及《电镀污染物排放标准》(GB21900-2008)水污染物特别排放限值标准.通过对惠州某金属表面处理厂的调查,分析了该厂的工艺技术特点,提出有关本行业污染问题的相应对策：首先,革新现有的落后技术,引进最新的高水平科学技术；其次,在生产处理过程中严格管理,特别是对高污染的化学物质；最后,妥善处理污染物,真正地实现生产处理过程中的清洁生产.
[Abstract]:Metal surface treatment technology is widely used in various industries and is an important technology for quality control and control. It is also the largest industrial pollution industry besides paper making. Because of the use of a large amount of acid in the metal surface treatment industry, Alkaline aqueous solutions and solutions containing heavy metals, even toxic chemicals such as cadmium, cyanide and chromate, produce a large number of toxic, harmful gases, solid and liquid pollutants. Therefore, it is of great significance to explore green technology for economic construction, social progress and human survival. This paper investigates and studies the production process and wastewater treatment equipment of a metal surface treatment plant in Huizhou. It is found that the pollution mainly comes from the dust produced by mechanical polishing process, waste aluminum powder, noise, solid waste produced by deoiling process, acid gas from chemical polishing process, and acid and alkali wastewater from various cleaning processes, etc. Among them, acid-base wastewater is the main pollution wastewater, and the main pollutants are acid-base type pH ~ (+) ~ (-1) SSS, petroleum, dichromate NH _ 3-N, alkylbenzene sulfonate. The wastewater treatment process is as follows: wastewater. 鈫扲egulating pool. 鈫扞nduced reaction cell. 鈫扚irst-order reaction cell. 鈫扴econdary reaction cell. 鈫扨rimary sedimentation tank. 鈫扵ertiary reaction cell. 鈫扴econdary sedimentation tank. 鈫扨h adjusting tank. 鈫扝ydrolytic acidification tank. 鈫扐 / A / O reaction. 鈫扴econdary sedimentation tank. 鈫扖lear water tank. 鈫扐fter a series of treatment, the wastewater discharged from a metal surface treatment plant in Huizhou conforms to the maximum allowable discharge concentration of national pollutants, The concentration of project wastewater after treatment by treatment facilities is lower than the first class standard of water pollutant discharge limit value of Guangdong Province, DB44P 26-2001g (second period) and the special emission limit standard of water pollutant (GB21900-2008). Through the investigation of a metal surface treatment plant in Huizhou, The technological characteristics of the plant are analyzed, and the corresponding countermeasures are put forward: first, to reform the existing backward technology and introduce the latest high level science and technology; secondly, to manage strictly in the process of production and treatment. Especially for the highly polluting chemicals, finally, the proper treatment of pollutants, the real realization of clean production in the process of production and treatment.
【学位授予单位】：武汉工程大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X703

【相似文献】