垃圾发电厂工艺流程图
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垃圾焚烧发电工艺流程图工艺流程简述:1、垃圾接收、贮存及运输系统垃圾接收、储存及输送系统是指垃圾进厂到垃圾焚烧炉给料斗入口之间的所有工艺和设备。
系统流程:满载垃圾运输车进厂“时经检视、称重,按指定路线和信号灯指示驶向垃圾倾卸平台卸料。
运输车倒行至指定的垃圾卸料门前,从开启的卸料门处,在重力作用下将垃圾卸入垃圾储坑。
垃圾经过垃圾起重机搅拌、充分混合、脱除一定的渗滤液之后,送入垃圾焚烧炉给料斗。
系统主要包括以下设施:电子汽车衡、垃圾卸料大厅(垃圾卸料平台)、垃圾卸料门、垃圾贮坑、垃圾起重机。
(1)垃圾接收车辆入厂称重前,由厂内专职人员根据《垃圾供应与运输协议》要求进行车辆检查,车辆需符合要求才能引导称重。
经称量后的垃圾运输车按指定路线和信号灯指示通过栈桥驶入卸料大厅,运输栈桥起于厂外,顶部采用弧形顶棚,由于栈桥为卸料大厅及垃圾坑补风入口,栈桥可自然维持负压。
垃圾卸料大厅供垃圾车辆的驶入、倒车、卸料和驶出,以及车辆的临时抢修。
垃圾卸料大厅为密闭式布置,卸料区为室内布置了气幕机,以防止卸料区臭气外逸以及苍蝇飞虫进入。
为了保障安全,在垃圾卸料口设置阻位拦坎,以防垃圾车翻入垃圾池。
卸车平台在宽度方向有1%坡度,坡向垃圾仓侧,垃圾运输车洒落的渗沥液,流至垃圾仓门前的地漏,汇集到管道中,导入渗沥液收集池。
垃圾卸料平台设垃圾卸料门,卸料门前装有红绿灯的操作信号,指示垃圾车卸料,为保证卸料门开启与垃圾抓斗作业相协调,卸料门]的开启信号传至垃圾抓斗操作室。
卸料门可防止有害噪音、臭气及粉尘从垃圾池扩散至大气。
在卸料平台的相应部位设置供水栓,以利于清洗卸料时污染的地面,卸料平台设计有一定的坡度使之易于排出清洗污水;在卸料大厅进、出口处设置空气幕,以防臭气外逸。
在停炉检修时,设置除臭风机抽取垃圾贮坑臭气,经活性炭除臭装置处理达标后经排气简排入大气。
(2)垃圾贮存垃圾贮存设施主要是垃圾贮坑,为半地下结构,它不仅能贮存垃圾,而且能够对垃圾进行搅拌、混合和脱水等处理。
垃圾焚烧发电厂工艺简介我司垃圾焚烧发电厂均采用先进的二段式炉排炉工艺,工艺流程如下:生活垃圾由垃圾封闭运输车运至发电厂→电子汽车衡过磅→卸入封闭的垃圾料坑内→垃圾经抓斗→给料斗→推料器→焚烧炉,在焚烧炉内高温燃烧,焚烧产生的烟气将水加热,并生成蒸汽,蒸汽驱动汽轮机组发电,焚烧产生的烟气经尾气处理装置净化后达标排放,焚烧产生的炉渣可以作为一般废物处理,布袋除尘器处理的飞灰作为危险废物加水泥与螯合剂固化处理。
二段式垃圾焚烧炉排分为逆推段和顺推段两个燃烧区域,其主要流程为:抓斗将垃圾从垃圾池送入落料槽,在给料机的推送下进入炉膛,落在倾斜的逆推炉排上,垃圾在床面上不断翻滚、搅拌,完成干燥、着火和燃烧过程,随后在逆推炉排的末端,经过一段落差,掉入水平的顺推炉排床面上,继续燃烧,直至燃烬,炉渣经出渣机排出炉外,然后外运制砖。
二段式型焚烧炉,该焚烧炉在燃烧时可控制燃烧温度。
可将该炉的焚烧温度控制在l050℃以内,并保证炉内温度大于850℃时,烟气停留时间>2s,氧气浓度%(控制在~%)。
当烟气从炉内排出时,采用降温措施迅速将烟气温度降低,并且在设计流程时,尽量减少烟气从高温到低温(600~200℃)过程的停留时间,以抑制二噁英的生成,保证烟气在处理系统内的温度<250℃。
经采取以上措施,可最大限度地抑制二噁英的生成减少排放,保护布袋除尘器的特种布料不受损坏。
在综合反应塔和袋式除尘器之间的水平烟道内,喷入活性碳粉末,可对残留的二噁英类等有毒有害气体进行吸附。
在布袋除尘器中,当烟气通过由颗粒物形成的滤层时,残存的微量二噁英(或重金属)仍能与滤层中未反应的Ca(OH)2粉末、活性碳粉末发生反应,从而进一步得到净化,最终达到﹤Nm3的欧盟排放标准。
垃圾储坑产生的臭气,主要成分有甲烷(CH4)、硫化氢(H2S)、氯化氢(HCl),还有无味的二氧化碳(CO2)等气体,为了防止臭气外逸,处理整个垃圾储坑采取严格的密封处理外,垃圾储坑采用负压运行,以免垃圾臭气与灰尘造成对环境的污染,在垃圾储坑上部设有吸风口,将垃圾储坑产生的臭气由一次风机抽吸作为燃烧用空气送入焚烧炉,两台炉平均每小时抽走储坑50000立方米臭气作为锅炉燃烧空气,在锅炉中经过850-1050℃的高温燃烧,大部分才臭气被分解,未被分解的尾气经我司的烟气处理系统后即可达标排放。
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The system is mainly about the disposal of urban household garbage and non-toxic&harmless industrial trashthrough the advanced, reliable, mature production technology and technical equipment. After the comprehensive implementation, we can realize the purpose of changing the reduced garbage into resources in a harmless way. Also,the heat energy generated out of garbage incineration can be used in heating and power supply. The chemical equilibrium and fludic analysis of gas as well as the precise equipment selection and temperature enaction shall be executed according to garbage contents at the design stage. From primary garbage input to final ash output , the whole system is controlled by automatic program, which not only cuts the workforce, but also ensures the system safety and steady operation, thus achieving the best garbage disposal effect.垃圾焚烧工艺流程图 Process Flow Of Grbage IncinerationHaving eliminated incombustible and noxious waste, the urban household garbage is sent to the factory by special garbage carrier. After weighed on weigh bridge, special garbage carrier is drived to garbage discharging platform, where garbage shall be unloaded into storage pool whch has the storing capacity for 5-7 days. There are two garbage cranes above storage pool for hauling ,stirring up and shifting to ensure the evenly distribution of the incinerated garbage.The incineration system covers the process of collecting garbage from carrier ,sending it to re-combustion space and then discharging the slag out ofincinerator.there are many kinds of incinerators, Incineration technology differs by incinerators. Using the most advanced international reciprocating mechanical grate, the system is devided into drying section, combustion section and burning section. According to the air amount provided by each stage and by adjusting the velocity of clockwise pushing, furnace temperature can be controlled ,thus increasing the garbage combustion efficiency..In the whole system, we will employ nationally the most advanced, most reliable and most mature equipment to produce steam by the heat generated from garbage incineration through residual heat boiler. Then the steam can be used to generate electricity through the steam electric generating set , then the electricity can be used on internet..Fume produced by garbage incineration contains some contamination such as smoke dust, acidic gas , dioxin , heavy metal and so on.In order to prevent the quadric environmental pollution, the garbage incineration temperature should be strictly controlled above 850℃for more than 2 seconds, which hereby ensures the decompositionof dioxin.With the drying fume purification process through adding reaction auxiliary agent and lime hydrate, fume discharge thus can meet with the internationally progressive indicator. &nbps;&nbps;&nbps;&nbps;垃圾渗滤Water inside garbage in the storage pool gives off leachate with heavy odious smell and high viscosity of organic pollution together with rich content of ammonia nitrogen,which accounting for around 10 percent of total garbage volume. Before been discharged and sent to sewage treatment plant by special duct , garbage leachate is processed by UAUB anaerobic reactor, membrane biochemical reactor and sludge disposal system at sewage treatment station which will be built in the factoryAs a common waste, cinder is about 15 percent of garbage. After being dropped onto the conveyer from furnace, the cinder is sent to piling place after being cooled, later on transported to the designated location for the secondary machining. after which, cinder can be turned into an auxiliary material for pavage and brickmaking.The flying ash, as a hazardous waste, collected by bag filter accounting for 3 percent of garbage, then be delivered to landfill site after being treated in a harmless way.Mainly from garbage storage pool, effluvium shall be controlled by reinforced seal. On one hand,caulk the pote-ntial leaking position with sealant. Secondly, set up air curtain at door of discharging platform to preventefflluv-ium leakage when a trash truck enters. Thirdly,draw out effluvium to hearth, and realize deodorization by conflagra-ting its effluvium ingredients.。