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宿遷市污泥處置方案比選及可行性研究

發(fā)布時(shí)間:2018-02-16 00:04

  本文關(guān)鍵詞: 污泥處置 干化 摻燒 工藝比選 出處:《北京化工大學(xué)》2015年碩士論文 論文類型:學(xué)位論文


【摘要】:近幾年,我國(guó)的經(jīng)濟(jì)迅速發(fā)展,與此同時(shí),污泥的產(chǎn)出量迅速增加。大量未經(jīng)處理的污泥,不僅搶占土地而且對(duì)環(huán)境造成了新的污染。本文以江蘇省宿遷市為例,論證適合宿遷污泥處置的方法。 (1)根據(jù)宿遷市的污水水質(zhì)狀況、產(chǎn)泥量現(xiàn)狀及污水處理測(cè)算了產(chǎn)泥量和處置規(guī)模;通過(guò)對(duì)宿遷7座污水廠污泥實(shí)地取樣檢測(cè),得出污泥水分、灰分、發(fā)熱量等基礎(chǔ)數(shù)據(jù),并采用污泥改性壓榨實(shí)驗(yàn)、污泥干化焚燒實(shí)驗(yàn)等手段論證了處置污泥前端污泥脫水的方法。(2)研究歸納分析了國(guó)內(nèi)外城市污水污泥處置技術(shù),綜合各種污泥處理和處置技術(shù)的特點(diǎn)以及國(guó)家要求,進(jìn)一步論證了污泥干化+單獨(dú)焚燒;污泥干化+發(fā)電廠摻燒;污泥深度脫水+發(fā)電廠摻燒,三種方案的可行性。 (3)以國(guó)內(nèi)蘇州、嘉興的工程實(shí)例對(duì)污泥干化進(jìn)行舉例介紹,并對(duì)污泥干化設(shè)備進(jìn)行了詳細(xì)的比較和選型。同時(shí),對(duì)污泥處置的除臭設(shè)備、收儲(chǔ)系統(tǒng)進(jìn)行了論證。 (4)完成了整體項(xiàng)目的投資估算和成本分析。通過(guò)研究得出以下結(jié)論:1、污泥工業(yè)分析、元素分析和發(fā)熱量分析結(jié)果與其他污泥接近,發(fā)熱量較低,焚燒處理前必須進(jìn)行脫水處置。2、用污泥干化方法進(jìn)行污泥焚燒前的脫水,脫水率可達(dá)到70%以上,脫水效果好,且運(yùn)行穩(wěn)定受制約因素少。3、干化后的污泥最終送至光大生活垃圾焚燒發(fā)電廠與生活垃圾混燒。干化后的污泥約40t/d,含水率約為55%,熱值約為800kcal/kg。污泥由輸送機(jī)送至焚燒廠料坑車間,通過(guò)輸送機(jī)進(jìn)入焚燒爐進(jìn)料口焚燒。4、光大生活垃圾焚燒發(fā)電廠日處理生活垃圾600t/d,污泥與垃圾的摻燒比約為6.7%,污泥摻燒比在10%以下時(shí),焚燒爐摻燒污泥基本不影響其正常運(yùn)行。5、項(xiàng)目近期建設(shè)規(guī)模為1 00t/d(含水82%計(jì)),采用“干化至含水55%后混合焚燒”工藝,測(cè)算單位處理成本約351.44元/t,單位運(yùn)行成本285.32元/t,從經(jīng)濟(jì)上考慮也是可行的。本文優(yōu)選了污泥處置工藝,提出了一個(gè)處置效果好、運(yùn)行穩(wěn)定、技術(shù)先進(jìn)、節(jié)能環(huán)保,兼顧環(huán)境效益、社會(huì)效益、經(jīng)濟(jì)效益的污泥資源化利用處置方案,對(duì)適合宿遷地區(qū)的污泥最終處置方法進(jìn)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.
【學(xué)位授予單位】:北京化工大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2015
【分類號(hào)】:X703

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