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燃油燃气热风炉的燃烧安全及防爆

2018-12-05 20:29:30 无锡科达脚手架厂 阅读

可燃气体与空气混合到一定范围能形成易燃易爆的混合气体。当混合气体在容器内时,其压力按不同气体可达0.75~1.65MPa。而水管热风炉的炉膛及烟道承压能力一般只有几万帕,锅壳热风炉炉胆承压能力较高,不会损坏,但其烟箱等会受到很大破坏。热风炉点火前,当因某种原因油气漏入炉膛,如阀门不严,误操作、一次点火未成功而又对炉膛烟道吹扫不够,再次点火就会发生爆炸。在运行中燃气热风炉由于燃气压力或风压波动太大会引起脱火或回火,这时如处理不慎会造成熄火引起爆炸事故。对负压运行的热风炉,当燃烧不良时,可燃气体进入热风炉后部烟道,与后部烟道漏入的空气混合形成爆炸性气体,在高温作用下,可能引起二次燃烧或爆炸。

Combustible gas and air mix to a certain extent to form flammable and explosive mixture gas. When the mixture gas is in the container, its pressure can reach 0.75-1.65 MPa according to different gases. However, the pressure-bearing capacity of the furnace and flue of the water pipe hot-blast stove is only tens of thousands of Pa. The shell hot-blast stove has a high pressure-bearing capacity and will not be damaged, but its smoke box will be greatly damaged. Before the hot blast stove is ignited, when oil and gas leak into the furnace for some reason, such as improper valve, misoperation, unsuccessful primary ignition and insufficient flue blowing, the re-ignition will explode. In operation, the gas hot blast stove will be deflagrated or tempered due to the fluctuation of gas pressure or air pressure. If it is handled carelessly, it will cause flameout and explosion accident. For the hot blast stove operating under negative pressure, when the combustion is not good, the combustible gas enters the back flue of the hot blast stove, and mixes with the air leaked from the back flue to form explosive gas. Under the action of high temperature, it may cause secondary combustion or explosion.

为了防止炉膛或烟道爆炸,在炉内无明火的情况下要防止燃料进入炉膛,要保证良好燃烧,要设置点火程序控制、熄火保护和燃烧自动调节控制系统。

In order to prevent the furnace or flue from exploding, in the absence of open fire in the furnace, fuel should be prevented from entering the furnace, and good combustion should be guaranteed. Ignition program control, flameout protection and combustion automatic control system should be set up.

为了减轻一旦发生爆炸时的破坏程度,应在热风炉的炉膛和烟道设置防爆门,防爆门在可燃气体爆炸突然升高压力时开启或破裂,泄放出高压气体,从而减轻对热风炉本体的破坏,保证热风炉房的安全。

In order to reduce the degree of damage in case of explosion, explosion-proof doors should be set up in the hearth and flue of the hot blast stove. The explosion-proof doors should be opened or broken when the explosion pressure of combustible gas suddenly rises, releasing high-pressure gas, thus reducing the damage to the main body of the hot blast stove and ensuring the safety of the hot blast stove room. 



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