There is an alternate process of heat and cold source between boiler and incinerator

　　Recently, there are too many gas explosions and various kinds of gas threats to personal safety. That's very important. According to the burning characteristics of gas in the furnace, the safety control requirements for gas mainly include pre blowing, automatic burning, burning condition monitoring, non ignition maintenance of biomass particle incinerator, flameout maintenance, gas pressure bump limit maintenance , maintenance of insufficient air pressure, power failure maintenance, measures to prevent leakage of gas, etc. Let's comment on the safe burning of fuel incinerator:

　　There is an alternate process of heat and cold source between boiler and incinerator. The temperature of the hot flue gas in the furnace can be as high as 800 ℃ - 1000 ℃. The combustion supporting gas should be the tail gas temperature of the high-temperature gas turbine at 500 ℃, while the temperature of the air used for incineration is only 25 ℃ - 50 ℃, so as to stimulate the potential for oscillation. Why does the incinerator parts vibrate during operation?

　　The lower part of the furnace of the boiler is the incineration area, and the upper part is connected with the flue. During the operation, the furnace is full of continuously flowing incineration generated gas, and the whole furnace space forms a gas flow field.

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　　The inner side of the furnace wall is affected by the dynamic pressure of the gas flow field in the furnace and the outer side by the atmospheric pressure. When the flow pressure of the gas in the furnace fluctuates, it will stimulate the oscillation of the furnace wall. In practice, due to the great influence of the fluctuation of the pressure of the boiler gas, the combustion is unstable, the furnace negative pressure fluctuates greatly, and the pressure difference between the inside and outside sides changes frequently, resulting in the oscillation of the boiler wall.

　　The vibration of furnace wall caused by incineration dynamics is inevitable. The function of rigid beam is to protect the furnace and flue from damage under furnace operating pressure or deflagration condition, that is, to increase the rigidity of furnace wall by adding rigid beam. If the rigidity of the rigid beam is not enough or the installation fails to meet the planning requirements, serious furnace wall oscillation will occur.

　　Change the natural frequency of the incinerator and the frequency of the eddy current generated by the incineration around the throat of the incinerator. In order to avoid the low-frequency oscillation of the flue gas column caused by the flame swing, the structure of the incinerator and the burning conditions should be improved.

　　It can change the natural frequency of combustion in the furnace, such as refitting double-sided water wall, large screen, horizontal superheater, etc. Improve the structure of air regulator and air box of incinerator accessories, such as adding flame stabilizer and air equalizing baffle. In order to avoid abnormal phenomena such as short circuit of flue gas, it is necessary to plan and arrange the orientation of flue gas recirculation inlet and control methods. Therefore, the above reasons may be the cause of the oscillation of incinerator accessories.

——Author：ebico