Between the boiler and the incinerator, there is a generative process of heat and cold sources. 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 atmosphere for incineration application is only 25 ℃ - 50 ℃, which will cause the potential of vibration. Why do incinerator accessories vibrate during operation?
The lower part of the boiler furnace is the incineration area, and the upper part is the same as the flue. During operation, the furnace is filled with continuous and active incineration production gas, which creates a gas flow field in all furnace spaces.
The inner side of the furnace wall is used for dynamic pressure of gas flow field in the furnace, and the outer side is used for atmospheric pressure. When the movable pressure of the gas in the boiler is found to be bumpy, it will cause the vibration of the boiler wall. In reality, the impact of the bumpy pressure of the gas in the boiler will lead to the unstable incineration, the large negative pressure bumping of the furnace, the frequent change of the pressure difference between the inside and outside, and the vibration of the boiler wall.
The wall vibration caused by the energy science of incineration can not be spared. The function of rigid beam is to protect the furnace and flue from damage under the furnace operating pressure or deflagration conditions, that is, to improve the rigidity of furnace wall by adding rigid beam. If the rigidity of the rigid beam is not enough or the placement is not up to the plan requirements, the relatively tense furnace wall vibration will occur in DUI.
Change the natural frequency of the incinerator and the frequency of the eddy current generated by the incineration at the throat boundary of the incinerator. In order to prevent the low-frequency vibration of flue gas column caused by flame swing, the layout of incinerator and burning conditions should be improved.
It can change the natural frequency of combustion in furnace, such as refitting double-sided water wall, large screen, degree superheater, etc. Improve the layout of the air box of the air conditioner for the accessories of the incinerator, such as installing the flame stabilizer and the air equalizing baffle. It is necessary to reasonably plan and install the flue gas reincarnation import status and control methods to prevent the discovery of unusual signs such as flue gas short circuit. Spicy? It may cause the above reasons.
1. The pulverized coal wrapped in the primary air of the reverse incinerator can reduce the contact area between the pulverized coal and the low NOx emission thermal atmosphere.
2. The flame consolidator of the central incinerator is still in stable operation even under low load operation.
3. Superior flame-retardant characteristics, clinker manufacturing can greatly improve the quality of plants, resulting in a solid coating, useful protective refractory brick.
4. The incinerator always follows a plan, which is to conform to the practical application premise of the equipment and reduce the operation cost.
5. The required tight air pressure is very low, which is lower than that of 10KPA consolidated operation without increasing high pressure atmosphere.
6. The axial position of the hydrocyclone has experienced the momentum of changing the incinerator inlet pressure in the application of the simple transformation of the vortex, which avoids the defects in the operation.
7. The incinerator can fully use the transformation of existing equipment in the user's application process, without the rest to help the innovation of equipment or coal supply system, and during the period of thrifty investment and short-term recovery.
——Author:ebico