Boiler heat pipe-type flue gas waste heat recovery method

Abstract

The invention relates to a boiler heat pipe-type flue gas waste heat recovery method. The method involves a filter water tank, a flue gas inlet, a flow guide plate, a flue gas outlet, a thermal insulation water tank, heat pipe exchangers, a thermal insulation water tank inlet, a thermal insulation water tank outlet, a filter water tank inlet, a water level regulator and a drain outlet. The heat pipe exchangers are arranged in the filter water tank and the thermal insulation water tank. Heat can be transmitted through evaporation and condensation of working media in totally-closed vacuum pipe shells of the heat pipe exchangers. Heat in flue gas is transmitted to water in the filter water tank. The working media in the heat pipe exchangers absorb the heat of the water in the filter water tank at the evaporation end and then transfers the heat to the condensation end. The working media can release a large amount of heat after condensation, so that the water in the thermal insulation water tank is heated, and waste heat can be recovered. Heat transfer area of the cold-hot sides of the heat pipe exchangers can be changed at will, and the problems of abrasion and dust blocking of the heat exchangers can be solved by changing the structure of the heat exchangers and expanding the heating surface. By the adoption of the method, the waste heat in the flue gas can be recovered simply and efficiently, and the energy-saving effect is obvious.

Description

technical field technical field [0001] The invention relates to a boiler heat pipe type flue gas waste heat recovery method. It belongs to the technical field of boilers. Background technique [0002] Nowadays, the world is facing serious energy problems. Energy is the basic condition for human development and survival, and human beings are increasingly dependent on energy. At present, biomass energy consumption ranks fourth in the world's total energy consumption, after coal, oil and natural gas. Our country has abundant types and quantities of biomass resources, which have broad prospects for development. [0003] Boilers are used in industrial production processes and domestic heating, providing a strong power support for the development of society. At present, biomass-burning boilers have been widely studied and applied, but the flue gas discharged during operation contains a large amount of impurities such as fly ash. If it is directly discharged into the atmosp...

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Problems solved by technology

[0006] In addition, in practical applications, the water in the heat exchange coil is flowing. In order to ensure a good heat exchange effect, its flow rate should not be too high. During the heat exchange process, an additional water pump is required to ensure the realization of the heat exchange effect. The power consumption is large, and it is very likely that the extra high-grade power consumed and the recovered waste heat will offset each other, and the device will lose its energy-saving effect

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