Flue Gas Heat Exchanger with Finned Tubes in The Power Industry

Flue Gas Heat Exchanger with Finned Tubes in the Power Industry

Finned tube flue gas heat exchangers have the following important applications in the power industry:

Boiler system

Improvement of thermal efficiency: The finned tube heat exchanger installed in the flue at the end of the boiler can effectively recover the residual heat in the flue gas and use it to preheat the air or water entering the boiler. For example, in a coal-fired boiler, the cold air can be preheated to about 200℃-300℃ and then sent to the furnace to participate in combustion, thus improving the combustion efficiency, reducing fuel consumption and improving the overall thermal efficiency of the boiler.

Reduce pollutant emissions: through the recovery of flue gas waste heat, the boiler exhaust temperature can be reduced to reduce the heat loss to the atmosphere, but also conducive to the subsequent flue gas desulphurisation, denitrification and other environmental protection equipment to improve the removal efficiency of pollutants, thereby reducing the emission of sulphur dioxide, nitrogen oxides and other pollutants.

Turbine system

Application in condenser: In the condenser of the steam turbine, the finned tube heat exchanger can be used as a cooling element to cool the steam discharged from the steam turbine and make it condense into water. Through the heat exchange between the finned tube and the cooling medium (e.g. circulating water), the heat of the steam is quickly taken away, and the condensation speed and efficiency of the steam is increased, thus maintaining the vacuum of the turbine and ensuring the efficient operation of the turbine.

Application in return heaters: The finned tube heat exchanger can also be used in the return heaters of the turbine, exchanging heat between part of the steam extracted from the turbine and the feedwater entering the boiler, increasing the temperature of the feedwater, reducing the fuel consumption of the boiler, and at the same time improving the efficiency of the entire thermal cycle.

Generator set cooling system

Radiator: For the cooling system of the generator set, the finned tube heat exchanger can be used as a radiator. During operation, the heat generated by the generator set is transferred to the finned tubes through the cooling medium, and then the finned tubes emit the heat to the surrounding air, so as to ensure that the temperature of the generator set is within the normal range, and to prevent overheating from affecting the performance and life of the generator set.

Cooler: In some generator sets with closed loop cooling system, the finned tube heat exchanger can also be used as a cooler to cool the lubricating oil, coolant and other media in the circulation, to ensure that these media work at the right temperature to maintain the normal lubrication and cooling effect of the generator set.

Waste Heat Power Generation System

Flue gas waste heat recovery: In some industrial production processes, a large amount of high-temperature flue gas is generated, which is rich in heat energy. The finned tube flue gas heat exchanger can be used to recover the waste heat of these flue gases, convert it into steam or hot water, and then convert the heat energy into electricity through steam turbine or hot water turbine and other equipment, so as to achieve the waste heat power generation, improve the comprehensive utilisation rate of the energy, and reduce the energy cost of enterprises.

Advantages

Efficient heat exchange performance: the special structure of finned tube increases the heat exchange area, which makes the heat exchange between flue gas and cooling medium more adequate and improves the heat exchange efficiency, and it can realise a large heat exchange capacity in a small volume to meet the demands of various heat exchange processes in the power industry.

Good adaptability: The finned tube flue gas heat exchanger can be selected according to different working conditions and media characteristics, such as the appropriate fin material, shape, spacing and other parameters, as well as different base tube materials and tube diameter, in order to adapt to high temperatures, high pressures, corrosive and other harsh operating environments, to ensure the stable operation of the different equipment in the power industry.

Compact structure design: the structure of the finned tube heat exchanger is relatively compact, small footprint, light weight, easy to install and arrange in the limited space of the power equipment, but also helps to reduce the investment cost and operation and maintenance costs.

Reliable operation stability: the use of high-quality materials and advanced manufacturing processes, the connection between the finned tube and the base tube is strong, can withstand large pressure and temperature changes, has a high degree of corrosion resistance, high temperature resistance and abrasion resistance, in the power industry in the long-term operation of the performance of the reliability of the power industry to reduce the downtime due to equipment failure to improve the continuity and stability of power production.