Flue Gas Waste Heat Recovery Heat Exchanger Working Principle

Flue Gas Waste Heat Recovery Heat Exchanger Working Principle

Its working principle is based on the principles of heat transfer and heat recovery.

A flue gas heat recovery heat exchanger usually consists of a flue gas channel and a working medium channel. The flue gas channel is the path through which the flue gas flows, while the working medium channel is used to transfer the heat energy from the flue gas.

When flue gases are produced by combustion or other heat sources in an industrial process, the flue gases carry a large amount of heat energy through the flue gas channel and into the flue gas waste heat recovery heat exchanger. In the flue gas channel, the high temperature heat energy of the flue gas is transferred to the working medium.

The working medium can be water, steam, hot oil and so on. They flow through the working medium channel and exchange heat with the flue gas. The heat energy of the flue gases is transferred to the working medium to increase its temperature.

There are various ways of heat exchange between the flue gas and the working medium, and common ways include direct contact heat exchange and indirect heat exchange. Direct contact heat transfer means that the flue gas and the working medium are in direct contact and exchange heat, while indirect heat transfer means that the heat exchange is carried out through the wall, and there is no direct contact between the flue gas and the working medium.

Through the flue gas waste heat recovery heat exchanger, the working medium absorbs the heat energy in the flue gas and raises its temperature. The hot working medium can then be used in other processes, such as heating water, evaporating liquids or generating electricity. In this way, heat energy in the flue gas that would otherwise be wasted is recovered and utilised, improving energy efficiency.

Overall, the flue gas waste heat recovery heat exchanger transfers thermal energy from industrial flue gas to the working medium through the principles of heat transfer and heat recovery, achieving energy recovery and utilisation. This helps to reduce energy consumption and reduce environmental pollution.