宿迁市污泥处置方案比选及可行性研究

发布时间：2018-02-16 00:04

本文关键词： 污泥处置干化掺烧工艺比选　出处：《北京化工大学》2015年硕士论文　论文类型：学位论文

【摘要】：近几年,我国的经济迅速发展,与此同时,污泥的产出量迅速增加。大量未经处理的污泥,不仅抢占土地而且对环境造成了新的污染。本文以江苏省宿迁市为例,论证适合宿迁污泥处置的方法。 (1)根据宿迁市的污水水质状况、产泥量现状及污水处理测算了产泥量和处置规模；通过对宿迁7座污水厂污泥实地取样检测,得出污泥水分、灰分、发热量等基础数据,并采用污泥改性压榨实验、污泥干化焚烧实验等手段论证了处置污泥前端污泥脱水的方法。(2)研究归纳分析了国内外城市污水污泥处置技术,综合各种污泥处理和处置技术的特点以及国家要求,进一步论证了污泥干化+单独焚烧；污泥干化+发电厂掺烧；污泥深度脱水+发电厂掺烧,三种方案的可行性。 (3)以国内苏州、嘉兴的工程实例对污泥干化进行举例介绍,并对污泥干化设备进行了详细的比较和选型。同时,对污泥处置的除臭设备、收储系统进行了论证。 (4)完成了整体项目的投资估算和成本分析。通过研究得出以下结论：1、污泥工业分析、元素分析和发热量分析结果与其他污泥接近,发热量较低,焚烧处理前必须进行脱水处置。2、用污泥干化方法进行污泥焚烧前的脱水,脱水率可达到70%以上,脱水效果好,且运行稳定受制约因素少。3、干化后的污泥最终送至光大生活垃圾焚烧发电厂与生活垃圾混烧。干化后的污泥约40t/d,含水率约为55%,热值约为800kcal/kg。污泥由输送机送至焚烧厂料坑车间,通过输送机进入焚烧炉进料口焚烧。4、光大生活垃圾焚烧发电厂日处理生活垃圾600t/d,污泥与垃圾的掺烧比约为6.7%,污泥掺烧比在10%以下时,焚烧炉掺烧污泥基本不影响其正常运行。5、项目近期建设规模为1 00t/d(含水82%计),采用“干化至含水55%后混合焚烧”工艺,测算单位处理成本约351.44元／t,单位运行成本285.32元/t,从经济上考虑也是可行的。本文优选了污泥处置工艺,提出了一个处置效果好、运行稳定、技术先进、节能环保,兼顾环境效益、社会效益、经济效益的污泥资源化利用处置方案,对适合宿迁地区的污泥最终处置方法进行了有益的探索。
[Abstract]:In recent years, the economy of our country has developed rapidly, at the same time, the output of sludge has increased rapidly. A large amount of untreated sludge has not only occupied the land but also caused new pollution to the environment. This paper takes Suqian City, Jiangsu Province as an example. According to the sewage water quality, the present situation of sludge production and sewage treatment, the sludge production and disposal scale are calculated, and the sludge moisture is obtained by sampling and testing the sludge from 7 sewage plants in Suqian. Ash content, calorific value and other basic data, sludge modification press experiment, sludge drying and incineration test were used to demonstrate the method of sludge dewatering at the front end of sludge. The domestic and foreign municipal sewage sludge disposal technology was summarized and analyzed. Based on the characteristics of various sludge treatment and disposal technologies and the national requirements, it is further demonstrated that sludge drying alone incineration, sludge drying power plant mixing, sludge deep dewatering power plant mixing, The feasibility of the three schemes.) taking the engineering examples of Suzhou and Jiaxing in China as examples, the sludge drying equipment is compared and selected in detail. At the same time, the deodorization equipment for sludge disposal is analyzed. The storage system has been demonstrated. 4) the investment estimate and cost analysis of the whole project have been completed. Through the research, the following conclusions have been drawn: 1, sludge industry analysis, element analysis and calorific analysis results are close to those of other sludge, and the calorific value is lower. Before incineration treatment, dewatering must be carried out. 2. Dewatering of sludge before incineration is carried out by sludge drying method. The dehydration rate can reach more than 70%, and the dehydration effect is good. And the stability of operation is limited by few factors. 3. The dried sludge is finally sent to Everbright MSW incineration power plant and mixed burning of domestic waste. After drying, the sludge is about 40 t / d, the moisture content is about 55%, and the calorific value is about 800 kcal / kg. The sludge is sent from the conveyer to the incinerator pit workshop. Through conveyors entering the incinerator to incinerate. 4, Everbright MSW incineration power plant daily treatment of domestic waste 600 t / d, sludge to waste mixing ratio of about 6.7, sludge mixing ratio of less than 10%, The mixed sludge of incinerator has no effect on its normal operation. The scale of the project in the near future is 1 00t / d (82% meters of water content). The process of "mixed incineration after drying to 55% water cut" is adopted. The unit treatment cost is about 351.44 yuan / t, and the unit operating cost is 285.32 yuan / t, which is also feasible in economic terms. In this paper, the sludge disposal process is selected, and a disposal process is put forward, which has a good disposal effect, stable operation, advanced technology, energy saving and environmental protection. Taking into account the environmental benefit, social benefit and economic benefit, the disposal scheme of sludge resource utilization is discussed in this paper, which is suitable for the final disposal of sludge in Suqian area.
【学位授予单位】：北京化工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X703

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