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褐煤泥枯燥机,下降电厂排放,下降花费本钱

信息来历: | 宣布日期: 2012-12-27 10:43:15 | 阅读量:684
关头词:褐煤泥枯燥机,下降电厂排放,下降花费本钱

褐煤泥枯燥机,下降电厂排放,下降花费本钱

适用法式在天下规模内看到发生和发送电力的本钱的增添。零售电费高于今年8-10%,本钱回升是一个行业的成长趋向 - 此中一个,将不会很快竣事。

一个动力源,能够或许加重该题目是褐煤,凡是被称为作为褐煤,具备介于烟煤和泥炭。

褐煤是更轻易转换成比排名较高的煤的气体和液体煤油产物,但它是多雨,更轻易遭到自觉combustrion。这明显会致使在运输和贮存的题目。一些历程能够或许消弭潜伏的水份锁定在褐煤,自燃的危险越低的黑煤,而把它变成一个玄色的煤当量燃料。

明尼苏达州的电力动力供给商,大河动力,heyl & patterson更进了一步,并供给了一个可延续成长,动力华侈下降本钱的处置打算,操纵褐煤和进步电厂的效力,同时枯燥和完美。这个进程被称为dryfining,或褐煤燃料加强。

heyl & patterson定制设想与褐煤枯燥,从38%到29.5%,操纵现有的和之前华侈的能量从电厂流化床枯燥机。

该名目始于一个原型机,厥后扩展到8流化床枯燥机。

设想为处置自在活动的资料,如矿物,化学品,塑料,木成品,谷物和废料,悬浮在氛围或气体的回升流,流化床枯燥器利用能量高效的流化的方式,该方式使物料像一个流体。这供给了一个高的传热速度,同时悄悄地处置的固体。它还能下降本钱装备和经营本钱,全主动化操纵的成果,其效力的打算节制体系集成到了。

这个观点是枯燥褐煤利用相连系的直接和直接加热,而后才在电厂汽锅熄灭。利用废热从发电厂咱们能够或许进步它的热值,这反过去又使电厂操纵更有用地枯燥的煤。全体而言,该进程下降客户的氮氧化物(nox)的20%,35%的二氧化硫(so 2)的排放量,并光鲜明显削减的二氧化碳(co 2)和汞,和他们的全体的保护本钱。已处置跨越40万吨的褐煤经由过程原型,不光鲜明显的操纵或保护题目。

该名目已获得了庞大胜利,大河动力。

据动力部(doe)名目部颁发的一份申明,“手艺经济捕获和利用已被该厂出产的煤炭去除水中的余热。经由过程下降水份含量,须要较少的煤天生不异数目的电力,这象征着较少的排放量和较低的排放节制本钱。“

2010年,dryfining的团队被评为年度电力工程公司的燃煤发电名目。 heyl帕特森和他的团队带领者的大河动力,该小组还包含部,动力部国度动力手艺尝试室,利哈伊大学动力研讨中间,电力迷信研讨院和工程扶植承包商worleyparsons的。

heyl&patterson的renneburg司工程师一些市场上^有用的和本钱有用的干衣机中,活着界上^大的流化床枯燥机,并且。该产物系列还供给了扭转式枯燥机,分化炉和热处置器到天下各地的客户。

lignite drying reduces power plant emissions, lowers consumer costs

utilities across the country are seeing increases in the cost of generating and transmitting electricity. with wholesale power bills 8-10% higher than previous years, rising costs are an industry trend – and one that won’t be ending soon.

one power source that can alleviate the problem is lignite, often referred to as brown coal, which has characteristics somewhere between bituminous coal and peat.

lignite is easier to convert into gas and liquid petroleum products than higher ranking coal, but it is wetter and more susceptible to spontaneous combustrion.  this obviously causes problems in transportation and storage.  some processes can remove the latent moisture locked within lignite, and lower the risk of spontaneous combustion to that of black coal, while transforming it into a black coal equivalent fuel.

for minnesota-based electric energy provider great river energy, heyl & patterson went one step further, and provided a sustainable, cost-reducing solution utilizing waste energy to simultaneously dry and refine lignite and increase the efficiency of the power plant.  the process is called dryfining, or lignite fuel enhancement.

heyl & patterson custom-engineered a fluid bed dryer to work with lignite coal and dry it from 38% to 29.5%, utilizing existing and previously wasted energy from within the power plant.

the project began with a single prototype dryer and was later expanded to eight fluid bed dryers.

designed to process free-flowing material, such as minerals, chemical, plastics, wood products, grain and waste, suspended in a rising flow of air or gas, fluid bed dryers use an energy efficient fluidizing method that causes the material to act like a fluid.  this provides a high rate of heat transfer while gently handling the solids.  it also provides lower capital equipment and operating costs, with fully automated operation that’s integrated into the plan control system as a result of its efficiencies.

the concept was to dry lignite using a combination of direct and indirect heating, before it is burned in the power plant boiler.  using waste heat from the power plant we were able to dry the coal raising its heating value which in turn makes the power plant operate more efficiently. overall, the process lowered the customer's nitrogen oxide (nox) by 20%, sulfur dioxide (so2) emissions by 35% and significantly reduced the carbon dioxide (co2) and mercury as well as their overall maintenance costs.  over 400,000 tons of lignite coal has been processed through the prototype with no significant operating or maintenances issues.

the project has been a tremendous success for great river energy.

according to a statement issued by the department of energy (doe) regarding the project, “the technology economically captures and uses the waste heat already being produced by the plant to remove water from the coal. by reducing moisture content, less coal is required to generate the same amount of electricity, which means fewer emissions and lower-emission-control costs.”

in 2010, the dryfining team was awarded power engineering’s coal-fired project of the year.  aside from heyl & patterson and team leader great river energy, the team also included the the department of energy's national energy technology laboratory, the lehigh university energy research center, the electric power research institute and engineering construction contractor worleyparsons.

heyl & patterson’s renneburg division engineers some of the largest fluid bed dryers in the world and are among the most efficient and cost effective dryers on the market. the product line also provides rotary dryers, calciners and thermal processors to customers around the world.

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