Sleeve type heat pipe organic medium evaporation medium-low temperature flue gas waste heat power generating system

Abstract

The invention provides a sleeve type heat pipe organic medium evaporation medium-low temperature flue gas waste heat power generating system, belonging to the field of energy and environmental technology. The sleeve type heat pipe organic medium evaporation medium-low temperature flue gas waste heat power generating system comprises a heat pipe heat exchange system, a working medium circulation loop with organic Rankine cycle, a medium-low temperature flue gas discharge pipeline, a heat supply hot water loop and a cooling water loop; heat pipes are adopted to replace uptake ducts and downtake ducts; the heat pipe heat exchange system comprises the heat pipes, a flue gas heat exchanger and a boiler barrel; the flue gas heat exchanger and the boiler barrel are arranged in an integral vertical sleeve structure; the tubular flue gas heat exchanger is sheathed outside the boiler barrel; the heat pipes are arranged in the flue gas heat exchanger and the boiler barrel in an inclined way; the lower parts of the heat pipes are arranged in the flue gas heat exchanger, and the upper parts of the heat pipes are positioned in the boiler barrel; methyl benzene, trifluoro- dichloroethane, propane, pentafluoro-propane and the like can be used as circulating working medium; and softened desalted water with the volume accounting for 20% of the volume of the heat pipes can be taken as working solution of the heat pipes. The sleeve type heat pipe organic medium evaporation medium-low temperature flue gas waste heat power generating system has the advantages that a small space is occupied by a steam generator, the heat pipes which work effectively are short, the heat loss is low, the heat exchange efficiency is high, and the like; and the return heat quantity of exhaust gas with organic Rankine cycle can be adjusted according to the heat supply load demand.

Description

technical field [0001] The invention relates to a sleeve-type heat pipe organic medium evaporation 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 ordinary r...

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Problems solved by technology

[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 it is very difficult to replace the riser and downcomer of the boiler, which is not conducive to the normal operation of the system and cost control

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