郑州市餐厨厨余垃圾处理工程项目工艺设计

发布时间：2018-09-12 04:59

【摘要】：随着城市规模扩大和人口增长,郑州市餐厨厨余垃圾呈现急剧增长势头,十分需要建设餐厨厨余垃圾处理厂。本文借鉴国内外成功经验,结合郑州市气候、地理、人口及经济发展现状,提出建设郑州市餐厨厨余垃圾处理厂的工艺设计方案。本方案测算并拟定郑州市餐厨厨余垃圾处理规模为:餐厨垃圾200 t/d、年处理餐7.3万t,厨余垃圾300 t/d,年处理厨余垃圾10.95万t。垃圾处理厂主要采用“预处理+厌氧发酵”综合处理工艺。即:餐厨垃圾采用“制浆+湿式中温厌氧发酵”的工艺方案,厨余垃圾采用“高压挤压分离+干式高温厌氧发酵”的工艺方案。餐厨垃圾进厂后,送至破碎机进行破碎,再进入制浆罐,制浆后的物料经渣浆分离机,浆液经除油后送入均质罐,最后送至湿式厌氧发酵罐,残渣送入填埋场处理。厨余垃圾进厂后,经破碎送入高效挤压分离机,将厨余垃圾分离成两部分,残渣部分送入填埋场进行填埋,有机质部分送至干式厌氧发酵罐。厌氧发酵产生的沼气,部分为湿解供给,部分为系统供电、供热,剩余部分用于厂区内及周边其他设施。垃圾处理厂主要工作系统包括:餐厨厨余垃圾收运系统、预处理系统、厌氧发酵系统、沼气净化利用系统以及沼渣脱水系统;其中沼液及渗沥液送入配套渗沥液处理系统,脱水沼渣送入堆肥车间,残渣送入填埋场处理。本设计方案符合国家及郑州市发展规划和政策需要,有利于实现餐厨垃圾的无害化、减量化和资源化处理,有利于保护城区环境卫生和人畜安全,具有良好的经济社会效益和示范性作用。
[Abstract]:With the expansion of the city scale and the population growth, the waste of food and kitchen waste in Zhengzhou City is increasing rapidly, and it is very necessary to build a kitchen waste treatment plant. Based on the successful experience at home and abroad and the present situation of climate, geography, population and economy in Zhengzhou City, this paper puts forward a process design scheme for the construction of a kitchen waste treatment plant in Zhengzhou. The scale of cooking waste disposal in Zhengzhou city is: 73000 t / d, 73000 t / d, 300t / d, 109500 t / d respectively. The waste treatment plant mainly adopts the "pretreatment anaerobic fermentation" comprehensive treatment process. That is, the process scheme of "wet medium temperature anaerobic fermentation of pulping" and "high pressure extrusion separation of dry high temperature anaerobic fermentation" was adopted for kitchen waste. After entering the factory, the waste is sent to the crusher for crushing, then into the pulping tank, the material after the pulping is separated by the slag slurry separator, the slurry is sent to the homogeneous tank after deoiling, and finally sent to the wet anaerobic fermenter, and the residue is sent to the landfill for treatment. After the kitchen waste is put into the factory, the kitchen waste is separated into two parts by crushing and feeding into the high efficiency extruding separator, the residue part is sent to the landfill for landfill, and the organic matter part is sent to the dry anaerobic fermenter. The biogas produced by anaerobic fermentation is supplied partly by wet hydrolysis, partly by power supply and heating by the system, and the rest is used in other facilities in and around the plant area. The main working systems of the refuse treatment plant include: the kitchen waste collection and transportation system, the pretreatment system, the anaerobic fermentation system, the biogas purification and utilization system and the biogas dehydration system, in which the biogas and leachate are fed into the supporting leachate treatment system. Dehydrated biogas residue is fed into composting workshop and residue is sent to landfill for treatment. The design scheme meets the development planning and policy needs of the state and Zhengzhou, is conducive to the realization of harmless, reduced and resource treatment of kitchen waste, and is conducive to the protection of urban environmental hygiene and human and animal safety. With good economic and social benefits and exemplary role.
【学位授予单位】：河南工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X799.3

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