It is understood that the furnace and air heat exchanger automatic protection system improve the heating efficiency. Furnace combustion requires combustion air is installed in the duct of the heat exchanger for preheating after hot air.
Therefore, heat exchanger of normal or not directly related to the use of heating furnace. The heat exchanger and a metal tubular structure, this means that the heat exchanger protection is to prevent the temperature is too high to avoid burn out the heat exchanger.
From the end of industrial furnace exhaust gas, temperature up to 600 ° c-1100 ° c thermal covers. away fuel supply heat of 30%-70% reduction of fuel consumption for industrial furnaces, conservation of energy of the most effective way is to recycle waste heat of high temperature flue gas. Used to preheat combustion air, recovery of heat from the furnace, returned to directly save fuel.
In order to prevent air heat exchanger in the preheater air temperature too high to be burned, in heat exchangers for air duct air diffusion on the set and equipped with automatic relief valve for hot air temperature exceeds the set value is automatically increase Preheat air quantity and open valve bleeding off part of hot air. In order to cut through the heat exchanger, air temperature up protecting the purpose of the heat exchanger.
Heat exchanger automatic protection devices for single-chip microcomputer controller, its analog input for temperature and pressure signals, required A/D conversion, from precision consider eight is enough; other input signals also includes the starting signal. Starting signal settings into account heat exchanger with automatic protection and manual control of the conversion. Only when the SCM receives a start signal before starting automatic protection control. Output signal including the motor and solenoid valve control, to complete the entire process.
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