环保采暖锅炉讲解简述燃煤锅炉的种类的优缺点
    2013-12-9 15:30:06  文章来源:http://www.jnlzsb.com

    燃煤锅炉作为一种新型节能环保的燃烧锅炉,已成为市场中的畅销商品,那么多种燃煤锅炉该如何分类呢?

    Coal fired boiler combustion boiler as a new energy saving and environmental protection, has become the market of selling goods, so many coal-fired boiler how classified?

    首先从 燃烧方式来看,可分为层燃炉,它是原煤经破碎成粒径为25~40毫米的碎块后,用炉前煤斗的煤闸板或播煤机平铺在链条炉排上作层状燃烧。层燃炉优点是附属设备少,制造、安装简便,易于运行操作。适用于中小容量锅炉。这种锅炉的缺点为煤的燃烧不完全,炉渣和飞灰中可燃物含量多,锅炉效率一般为75~85%。通常要烧较好的煤。另一种是室燃炉,又称煤粉炉。原煤经筛选、破碎和研磨成大部分粒径小于0.1毫米的煤粉后,经燃烧器喷入炉膛作悬浮状燃烧。煤粉喷入炉膛后能很快着火,烟气能达到1500℃左右的高温。但煤粉和周围气体间的相对运动很微弱,煤粉在较大的炉膛内停留约2~3秒才能基本上烧完,故煤粉炉的炉膛容积常比同蒸发量的层燃炉炉膛约大一倍。这种锅炉的优点为能燃烧各种煤且燃烧较完全,所以锅炉容量可做得很大,适用于大、中型及特大型锅炉。锅炉效率一般可达90~92%。其缺点为附属机械多,自动化水平要求高,锅炉给水须经过处理,基建投资大。

    From the first combustion mode, can be divided into the layer combustion furnace, it is coal crushing into a diameter of 25 ~ 40 mm pieces, for stratified combustion in chain grate furnace bin coal gate or sowing coal machine tile. Layer combustion furnace has the advantages of less accessory equipment, manufacturing, installation is simple, easy to operate. Suitable for medium and small capacity boiler. This boiler is the incomplete combustion of coal, the combustible in fly ash content in slag and boiler efficiency, generally 75 ~ 85%. Usually good coal burning. Another is the chamber combustion furnace, also known as pulverized coal furnace. Through coal pulverized coal screening, crushing and grinding into a particle size of less than 0.1 mm, the burner into the furnace as suspension combustion. Pulverized coal injection into furnace soon after the fire, smoke can reach a high temperature 1500 ℃. But the relative motion between the coal and the surrounding gas is weak, pulverized coal in large furnace for about 2 to 3 seconds to basically is burned, the pulverized coal fired boiler furnace volume often compared with the evaporation layer combustion furnace is about twice as large as. Advantages of this boiler for burning various coal and more complete combustion, so the capacity of the boiler can be large, suitable for large, medium-sized and large boiler. The efficiency of the boiler can reach 90 to 92%. The disadvantage of this subsidiary machinery, high level of automation, boiler feed water must be processed, high construction investment.

    其次就是旋风炉,它是将粒径小于10毫米的碎煤粒或粗煤粉先在前置式旋风筒内作旋风状燃烧,所产生的高温烟气再进入主炉膛(冷却室)内进行辐射换热。旋风炉的优点为炉膛容积热强度高,炉子的尺寸小;过剩空气系数小(仅为1.05~1.10),可以降低排烟热的损失;燃用粗煤粉可简化制粉设备;排渣率高,飞灰浓度低,提高烟气速度加强对流受热面的传热。其缺点是适用煤种受灰熔点和渣的粘滞性的限制;锅炉负荷变动范围较小;不能快速启停;由于炉内温度可达2000℃左右,有害气体NOx排放量大,对大气污染较严重。综上所述,燃煤锅炉的多种分类具有不同的特点及不足,消费者在购买时要选购适合自己的产品。

    The second is the cyclone furnace, it is the particle diameter less than 10 mm for the pulverized coal particle or coarse pulverized coal in the first cyclone cylinder makes the cyclone combustion, high temperature flue gas generated by re entering the main chamber (a cooling room) for radiation heat transfer. Advantages of cyclone furnace for furnace heat intensity is high, the size is small; the excess air coefficient is small (only 1.05 ~ 1.10), can reduce the heat loss; coarse pulverized coal burning can simplify the milling equipment; high rate of slag, fly ash concentration low, improve the velocity of flue gas convection heat transfer surface strengthening by. Its shortcoming is applicable coal ash melting point and viscosity of the slag of boiler load limit; fluctuation range is small; not quick start and stop; because the temperature of the furnace is 2000 ℃, harmful gas emissions of NOx, serious pollution of the atmosphere. In summary, a variety of classification of coal-fired boiler has different characteristics and disadvantages, for consumers to choose for their own products at the time of purchase.

    环保采暖锅炉http://www.jnlzsb.com/ 

     

<友情连结> 新利18luck jxf吉祥坊 云顶斗地主