In the boiler equipment, the air preheater is also referred to as the heat pipe air preheater, generally referred to as the air preheater. The air preheater can improve the heat exchange performance of the boiler and reduce the heat loss.
The Euromonitor series gas-fired steam boiler launched by Fangkuai Boiler Factory has added the air preheater as an important accessory. After relevant tests, data proves that with this accessory, the boiler can save energy by at least 10%. So, how does the air preheater achieve this 10% energy saving rate? Let the after-sales engineer Xie Gong of Zhengzhou Fangkuai Boiler Factory tell you the answer.
The air preheater uses the heat of the boiler tail flue gas to heat the air required for fuel combustion to improve the efficiency of the boiler. The air preheater is the flue gas in the boiler tail flue through the internal heat sink to preheat the air before entering the boiler The heated surface to a certain temperature. Used to improve the heat exchange performance of the boiler and reduce energy consumption. Generally referred to as an air pre-controller. According to the difference in structure, the air preheater can be divided into two types: tube box type and rotary type. The rotary type is divided into two types: wind hood rotary type and heating surface rotary type. At present, power plant boilers often use heating surface rotary preheaters. The application in boilers is generally two-cell, three-cell, and four-cell types, among which four-cell bins are more commonly used in circulating fluidized bed boilers.
The function of the air preheater is mainly to transfer the heat carried in the flue gas discharged from the flue at the tail of the boiler to the air before entering the boiler through the heat sink, and to preheat the air to a certain temperature. The heat pipe air preheater uses the heat energy of the flue gas at the outlet of the boiler to transfer heat through the superconducting heat pipe to preheat the combustion air of the boiler or other drying purposes.
Of course, we also want to remind everyone to pay attention to the corrosion and ash accumulation of the air preheater, which is harmful to the boiler.
Because the air preheater is located in the lowest flue temperature area in the boiler, especially the cold end of the final air preheater, the air temperature is the lowest, the flue gas temperature is also the lowest, and the heating surface wall temperature is the lowest, so it is most prone to corrosion and dust accumulation.
