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燃煤热风炉与燃气热风炉的区别

人气:29 评论:0 日期:2018-11-17 09:00:10

1.燃烧方式:循环流化床燃煤热风炉是将煤通过破碎设备,经皮带进煤仓,通过给煤机利用播煤风,撒入炉膛;通过循环灰加热,流态化燃烧过程。而煤改气后将焦炉煤气和驰放气混合合由四个燃烧器喷入直接燃烧。2.燃烧产物:煤主要是由C、H、O、N、S等元素和灰分及水分组成,煤燃烧放出热量后,生成SO2、SO3、NOx灰分和水分,而SO2、SO3、NOx由烟气排入大气,污染环境,对人类造成危害。而焦炉气和驰放气成都收账主要成分是CO和H2,经过燃烧后,主要生成CO2和H2O,相对燃煤热风炉燃气热风炉成都找人企业排放SO2、SO3、NOx要少得多。

1. combustion mode 

The circulating fluidized bed coal-fired hot blast stove is the coal through the crushing equipment, through the belt into the coal bin, through the coal machine using the coal sowing wind, sprinkled into the furnace; through the circulation of ash heating, fluidized combustion process. After the coal is converted to gas, the coke oven gas and the vent gas are mixed and mixed into four parts by direct combustion.

2. combustion product

Coal is mainly composed of C, H, O, N, S and other elements and ash and water composition. After coal burning and releasing heat, it generates SO2, SO3, NOx ash and water, and SO2, SO3 and NOx are discharged into the atmosphere by the flue gas, polluting the environment and causing harm to the human. The main components of coke oven gas and galloping gas are CO and H2. After burning, the main components are CO2 and H2O, and the emission of SO2, SO3 and NOx is much less than that of the gas hot blast stove of the coal-fired hot blast stove.

3.通风方式

3. ventilation mode

燃煤热风炉一般采用负压燃烧,基燃烧过程是由鼓风机和引风机成都收账配合配合收账配合来共同完成,煤在燃烧过程中,需要大量成都找人企业空气,而由于炉墙烟道的漏风,过量空气系数可达2.1-2.5之间。燃气热风炉采用微正压或微负压燃烧,需要的风量小,在燃烧器内空气能较好的与天然气预混。微正压燃烧没有炉墙和烟道的漏风因素,运行中烟道出口空气系数可为1.05-1.2。

The burning process of coal fired hot air is usually carried out by negative pressure, and the basic combustion process is completed by the coordination of the blower and the fan. In the combustion process of coal, a large amount of air is needed, and the excess air coefficient can reach 2.1-2.5 due to the leakage of the furnace wall flue. Gas-fired hot-blast stove uses micro-positive pressure or micro-negative pressure combustion, which requires less air volume, and the air in the burner can be better premixed with natural gas. Micro positive pressure combustion has no air leakage factor of furnace wall and flue. The air outlet coefficient of flue gas in operation can be 1.05-1.2.

4.燃料易爆性

4. fuel flammability

燃煤热风炉燃烧安全,炉膛不易发生爆炸危险。而燃气热风炉在爆炸浓度界限内,遇到明火就会发生爆炸。危险性较大。

The combustion of coal fired hot blast stove is safe, and the furnace is not easy to explode. And the gas hot stove will explode when it meets the open fire within the limit of explosion concentration. The danger is great.

5.热风炉自动控制

Automatic control of 5. hot air furnace

燃煤热风炉由于受到煤种、料层厚度、鼓风量、引风量、风煤配比等原因,要做到根据负荷来自动调节热风炉运行参数的难度大。而燃气热风炉所受影响因素较少,可根据负荷调节燃烧器阀门大小,容易实现自动控制。

Because of the coal, the thickness of the material layer, the amount of air blast, the ratio of wind coal and the ratio of wind coal, it is difficult to automatically adjust the operating parameters of the hot blast stove according to the load. The gas stove has less influence factors, and can adjust the burner valve size according to the load, so it is easy to realize automatic control.

总结

summary

经过煤改气成都找人企业的实际改造,及运行分析。改造后的成都***工艺指标,燃烧特性指标均达到设计要求,并能实现使用与监控一体化,极大地降低了成都***潜在的危险性。同时在减少购买新炉的成本的基础上,减少了气体污染物的排放。实现了经济效益和环境保护的双赢。

The actual transformation and operation analysis of the coal to gas hot blast stove are carried out. The technical index of the reformed hot blast furnace, the combustion characteristic indexes all meet the design requirements, and can realize the integration of the use and monitoring, which greatly reduces the potential danger of the hot blast stove. At the same time, on the basis of reducing the cost of buying new furnaces, the emission of gaseous pollutants is reduced. The win-win of economic and environmental protection has been realized.


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