本文選題：氯堿工業(yè)廢水 + 污水回用　； 參考：《北京化工大學(xué)》2015年碩士論文

【摘要】：隨著全球經(jīng)濟(jì)和社會的發(fā)展,人類農(nóng)業(yè)和工業(yè)活動對水的需求逐步增加,使得淡水供求矛盾日益增加,這就要求人們開始研究和設(shè)計各類工藝和設(shè)備來提高水資源綜合利用效率。我國是一個嚴(yán)重缺水的國家,人均淡水不足全球平均水平的四分之一,而隨著我國經(jīng)濟(jì)的快速發(fā)展,一方面是對潔凈水的需求量不斷增加,另一方面是水體污染越來越嚴(yán)重。作為氯堿化工企業(yè)來說隨著水體污染的廢水排放標(biāo)準(zhǔn)的日益嚴(yán)格,工業(yè)用水價格的不斷上漲,氯堿化工廢水回用的經(jīng)濟(jì)性也得到越來越多人的重視。如何降低用水量,如何將水分級使用,如何實現(xiàn)水的內(nèi)部循環(huán)利用是當(dāng)前氯堿企業(yè)面臨的一個需要立即解決的問題,因此,開發(fā)廢水回用新工藝,以達(dá)到減少污水排放量、降低生產(chǎn)成本、提高環(huán)保及社會效益的目的對氯堿企業(yè)進(jìn)行廢水深度處理及合理利用資源具有重要的現(xiàn)實意義。本論文以新疆中泰化學(xué)股份有限公司華泰氯堿廠為研究對象,通過查閱企業(yè)相關(guān)資料及現(xiàn)場調(diào)查,結(jié)合企業(yè)各工段生產(chǎn)工藝過程、給排水狀況及污水廢水處理系統(tǒng)進(jìn)行現(xiàn)狀分析,評估該企業(yè)的節(jié)水潛力并提出節(jié)水改造措施,根據(jù)“一水多用,重復(fù)利用”的節(jié)水原則提出廢水減排方案,對工藝廢水經(jīng)過資源回收利用,主要針對企業(yè)燒堿車間蒸發(fā)工序產(chǎn)生的蒸汽冷凝水,聚合車間截留蒸汽冷凝水凈化回用至純水,PVC母液水生化處理代替凱膜廢水處理裝置,應(yīng)用于循環(huán)回用水,以及母液水中污染成分來源的乙炔車間廢次鈉減污和用水方案進(jìn)行優(yōu)化改進(jìn),并對改造后的水質(zhì)狀況和節(jié)水效益進(jìn)行系統(tǒng)分析及討論,證明了所提出的氯堿廠廢水節(jié)水減排實施方案的科學(xué)性及合理性,為順利展開進(jìn)一步的科研工作和企業(yè)污水處理的工程改建提供具有普適性的實踐指導(dǎo)意義。此外,提出一些可以進(jìn)一步節(jié)水改造的設(shè)想,水的用量污水排放量減少的同時,還可以考慮改善水質(zhì)為目標(biāo),把污染降到最低。
[Abstract]:With the development of the global economy and society, the demand for water in human agricultural and industrial activities has gradually increased, resulting in an increasing contradiction between supply and demand for fresh water. This requires people to begin to study and design various processes and equipment to improve the efficiency of comprehensive utilization of water resources. China is a country with serious shortage of water, the per capita fresh water is less than 1/4 of the global average level. With the rapid development of our economy, on the one hand, the demand for clean water is increasing, on the other hand, the pollution of water is becoming more and more serious. As a chlor-alkali chemical enterprise, with the increasingly strict water pollution wastewater discharge standards and the rising price of industrial water, more and more people attach importance to the economy of recycling chlor-alkali chemical wastewater. How to reduce water consumption, how to use water by stages and how to realize the internal recycling of water is a problem that needs to be solved immediately by chlor-alkali enterprises. Therefore, a new process of wastewater reuse is developed to reduce the discharge of wastewater. The purpose of reducing production cost and improving environmental and social benefits is of great practical significance for advanced treatment of waste water and rational utilization of resources in chlor-alkali enterprises. This paper takes Huatai chlor-alkali plant of Xinjiang Zhongtai Chemical Co., Ltd. as the research object, through consulting relevant information of the enterprise and on-the-spot investigation, combining with the production process of each section of the enterprise, The present situation of water supply and drainage and wastewater treatment system is analyzed, the water saving potential of the enterprise is evaluated, and the measures of water saving reform are put forward. According to the principle of water saving, reuse and reuse, the scheme of reducing the emission of wastewater is put forward. After resource recovery and utilization, the process wastewater is mainly aimed at steam condensing water produced by evaporation process in caustic soda workshop. The condensate water is purified and reused in polymerization workshop to replace the membrane wastewater treatment unit with pure water and PVC mother liquor. It is applied to recycle and reuse water and acetylene workshop waste sodium pollution reduction and water use scheme which is applied to recycle reuse water and mother liquor water pollution source. The water quality status and water saving benefit after revamping are analyzed and discussed systematically. It is proved that the proposed scheme of water saving and emission reduction of chlor-alkali plant wastewater is scientific and reasonable, which provides general practical guidance for further scientific research and reconstruction of enterprise sewage treatment project. In addition, some suggestions for further water-saving renovation are put forward. While the amount of waste water is reduced, the aim of improving water quality can be considered to minimize the pollution.
【學(xué)位授予單位】：北京化工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TQ085;X781.2

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