Excuse me, why do some gas boiler chimneys emit white smoke and some gas boiler chimneys do not smoke?

Some gas boiler chimneys emit white smoke, and some gas boiler chimneys do not smoke because the dust removal equipment adopts wet dust removal. The water content of flue gas is high. If the temperature of the flue at the tail of the boiler is too high, water vapor will be produced. Dry cyclone dust collector is adopted. If the air distribution of the boiler is not properly adjusted.

White is actually steam, mostly from steelmaking, ironmaking and sintering. Most of the steam looks white, especially in the morning, and it can be seen that it is very thick. I feel fixed again, rising slowly, which is the cleaning of normal production.

Extended data:

With the help of stack effect, organized natural ventilation and smoke exhaust can be realized indoors, but its negative effects are also various: first, sandstorms blow into the room through various holes and gaps in the lower floor, consuming heat and polluting the room; Secondly, the elevator door can't be closed normally in the process of wind leading from the bottom hall door to the top floor through the elevator shaft;

When a fire broke out, with the sharp rise of indoor air temperature, the volume increased rapidly, especially in stack effect. At this time, all kinds of vertical shafts become vertical channels to draw fire smoke, which is the main way for the fire to spread vertically, thus contributing to the expansion of the fire. Some data show that the vertical diffusion velocity of flue gas in vertical tube well is 3-4m/s, that is, a high-rise building with a height of 100m.

It only takes about 30 seconds for fireworks to go directly from the bottom to the top. If the burning conditions are met, the whole building may form a sea of fire in an instant. In order to effectively reduce the negative impact of stack effect, the following measures can be taken.