宁东高盐水评价及处理技术研究

发布时间：2018-05-30 08:28

本文选题：高盐水 + 污水处理　；参考：《长安大学》2015年硕士论文

【摘要】：高盐水淡化处理技术已成为制约煤化工企业发展的重大问题之一,在多旱少雨宁夏地区,对高盐水进行处理回用,能够提高宁东地区污水排放达标率和水资源综合利用效率,进而调整宁东地区水资源利用结构,缓解用水压力,节约淡水资源、减少环境污染,提升宁东能源化工基地整体形象。本论文通过对宁东园区三处调节池、矿井水采样化验,采样混合型Pi.Sigma神经网络对污水进行评价,给出定量分析,以此在园区建设污水处理厂及污水处理后的回收利用规划,我们主要完成的工作是:(1)建立混合型Pi.Sigma神经网络水质评价模型,对园区污水水质进行定量分析,结果表明调节池、矿井水等四处采样点水质为Ⅴ类,根据计算出的污染指数调节池的水质污染更严重;有化验数据可知,污水污染物含量比较高,但是由于该处污水的矿化度(含盐量),与一般污水处理厂的技术不匹配,给污水达标处理造成困难。因此必须针对高盐度污水进行处理。(2)对要建设的污水处理厂选址,比较各个方案,选出最合适的厂址:煤化工园区中水厂选在3#集污调蓄转换池北侧,化工新材料园区污水处理厂西侧18#地块新建中水厂,浓盐水综合利用区选在永利村南侧,3#渣场向南空地建设。(3)根据选定的厂址,综合考虑各地区高程、泵站扬程、输送距离、工程预算,最终确定的输水方案为:沿高速公路和307国道之间向东南敷设至307国道~鸳冯路路口,穿越307国道至路口西南角,之后沿鸳冯路西向南敷设,穿越鸳鸯湖电厂铁路线后,沿铁路南侧向西转向进入化工新材料园区中水厂。此方案管线长度约11km,管线最高点1370米。(4)就目前高盐水处理存在的问题进行了分析,针对存在问题给出了高盐水处理技术方案:“化学预处理+超滤系统+反渗透处理工艺”处理高盐水,75%作为中水回用,25%浓盐水送至浓盐水综合利用区,通过自然晾晒、海藻养殖、冬季造冰方式进一步处理利用,最终盐饼送3#渣场填埋处理。并对该方案进行具体设计分析。(5)对高盐水具体的回收利用方案进行分析,结合园区实际情况,给出具体回收方案:浓盐水给排水收集储池、浓盐水分质分级系统淡化与再利用、高盐水调制淡化水养殖盐藻与螺旋藻、荒漠化土地整治与生态建设。
[Abstract]:The desalination treatment technology of high salt water has become one of the major problems restricting the development of coal chemical enterprises. In Ningxia region with more drought and less rain, the treatment and reuse of high salt water can improve the discharge rate of sewage and the comprehensive utilization efficiency of water resources in the east of Ningxia. And then adjust the structure of water resources utilization, relieve water pressure, save fresh water resources, reduce environmental pollution, and promote the overall image of Ningdong energy and chemical industry base. This paper evaluates sewage through three regulating ponds, mine water sampling test and sampling mixed Pi.Sigma neural network in Ningdong Park, and gives quantitative analysis, so as to construct sewage treatment plant in the park and plan the recovery and utilization after sewage treatment. Our main work is to establish a mixed Pi.Sigma neural network water quality evaluation model, and to quantitatively analyze the wastewater quality in the park. The results show that the water quality of the four sampling points, such as the regulating pool and the mine water, is Class V. According to the calculated pollution index, the water quality of the regulating pool is more serious. According to the test data, the sewage pollutant content is relatively high, but because of the salinity (salinity) of the sewage there, it does not match the technology of the general sewage treatment plant. It is difficult to treat the sewage up to standard. Therefore, it is necessary to treat the high-salinity sewage. 2) to select the site of the sewage treatment plant to be built, compare the various schemes, and select the most suitable site: the water plant in the coal chemical industry park is selected on the north side of the conversion pool for sewage collection and storage in the coal chemical industry park. The new chemical material park sewage treatment plant west side 18 # new construction middle water plant, the concentrated salt water comprehensive utilization area selects in Yongli village south side of the dregs yard to the south empty lot construction. (3) according to the selected factory site, synthetically considers each area elevation, the pumping station lift, the transportation distance, According to the project budget, the final water conveyance plan is to lay southeast between the expressway and the 307 National Road to the junction of National Highway 307 ~ Uyen Fung Road, to cross National Road 307 to the southwestern corner of the junction, and then to lay water along Uyen Fung Road west to the south. After crossing the railway line of Yuanyanhu Power Plant, it turns westward along the south side of the railway to enter the Central Water Plant of the New Chemical material Park. The pipeline length of this scheme is about 11km, and the highest point of the pipeline is 1370 meters. In view of the existing problems, the technical scheme of high brine treatment is given: "Chemical pretreatment ultrafiltration system reverse osmosis treatment process" to treat 75% of high brine as reclaimed water, 25% concentrated brine is sent to the comprehensive utilization area of concentrated brine, and then it is dried naturally. Seaweed culture, further processing and utilization of ice making in winter, and landfill treatment of salt cake sent to slag yard. And the concrete design and analysis of this scheme. (5) analyzing the concrete recovery and utilization scheme of high salt water, combining with the actual situation of the park, giving the concrete recovery scheme: concentrated salt water supply and drainage storage pool, desalination and reuse of concentrated brine grading system. Salt algae and Spirulina in desalination water, desertification land treatment and ecological construction.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X824;X703

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