Air To Air Heat Exchanger is classified according to the location and its role:
1、Flue gas cooler
Flue gas cooler is arranged after the Air Preheater, before the electric precipitator, or between the precipitator and desulfurization tower, using the boiler exhaust waste heat to heat condensate, circulating water or other working conditions to reduce the exhaust temperature of the Air Heat Exchanger.
2、Flue gas reheater
Flue gas reheater is arranged after the desulfurization tower, before the chimney, the use of circulating water in the flue gas cooler to absorb heat or other working conditions to heat the net flue gas after the wet desulfurization device air heat exchanger.
Application show
An enterprise production workshop blending area, using exhaust hood collection for local ventilation, the exhaust hood is set above the pollutants.
The project is closed to the coating head area, and full ventilation is used. The amount of full ventilation can be determined according to the number of air changes, as the space cleanliness level in the plant is 7, according to GB50073-2001, the number of air changes is 15 to 25 times, and the program is selected as n=20, the emission Q1 is 1200m3/h, and the emission Q2 is 2400m3/h.
The organic waste gas is burned to produce carbon dioxide and water, and the hot organic gas is converted into harmless gas. The hot gas enters the heat exchanger to exchange heat with the raw gas to preheat the raw gas, and then the heated raw gas is sent to the combustion chamber.
During the whole combustion process, the heat generated by part of the purified gas is recovered by the heat exchanger, which achieves the purpose of waste heat recovery.
The Finned Tube Heat Exchanger is also can be used in the industry.
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