Power generation system for waste heat of medium and low temperature flue gas with heat pipe heat exchanger organic medium Rankine cycle

Abstract

The invention provides a power generation system for waste heat of medium and low temperature flue gas with heat pipe heat exchanger organic medium Rankine cycle, and belongs to the technical field of energy and environment. The invention comprises a heat pipe heat exchanger system, a working medium circulation loop of organic Rankine cycle, a medium and low temperature flue gas exhausting pipeline, a heating hot water loop and a cooling water loop, wherein an ascending pipe and a descending pipe of a boiler are replaced by heat pipes, the heat pipe heat exchanger system is formed by a heat pipe, a flue gas heat exchanger and a boiler cylinder, evaporating section of the lower end of the heat pipe is arranged in flue gas heat exchanger, condensing section of the upper end is arranged in the boiler barrel, toluene, dichlorodifluoromethane, propane and pentafluoropropane are used as working medium, 20% volume of the softening desalted water is used as the heat pipe fluid. The invention has advantages of high efficiency of heat exchange, convenient replacement of heat pipe, being capable of avoiding corrosion and uneasy-change of the heat exchanger pipe, affecting the heat transfer efficiency and leakage of the working medium and other advantages, and being capable of adjusting exhaust heat of the organic Rankine cycle according to the demand for heating load of users.

Description

technical field [0001] The invention relates to a heat pipe heat exchange organic medium Rankine cycle medium and low temperature flue gas waste heat power generation system, which belongs to the technical field of energy and environment. Background technique [0002] At present, the medium and low temperature flue gas waste heat power generation system uses the boiler's ascending tube and downcomer for heat exchange. After a certain period of use, it will corrode and rupture due to long-term contact with the flue gas, causing the organic working medium to leak into the flue gas. In the pipeline, it leads to the waste of organic working fluid and the decline of heat exchange efficiency, and the replacement of the riser and downcomer of the boiler is very difficult, which is not conducive to the normal operation of the system and cost control. [0003] The heat pipe is the most basic element of the heat pipe heat exchanger. Judging from its appearance, it is usually an ordina...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a heat pipe heat exchange organic medium Rankine cycle medium and low temperature flue gas waste heat power generation system, which uses heat pipes to replace the riser and downcomer of the boiler, and solves the problems caused by the difficulty in replacing the boiler heat exchange pipe and the corrosion of flue gas. Reduced heat transfer efficiency, waste of organic working fluid, etc.

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