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

A Rankine cycle and heat pipe heat exchange technology, applied in the field of energy and environment, can solve the problems of flue gas corrosion, heat exchange efficiency drop, replacement difficulty, etc., to meet process requirements, improve heat exchange efficiency, and fully utilize heat energy. Effect

Inactive Publication Date: 2012-04-04
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.

Method used

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

Examples

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Effect test

Embodiment 1

[0024] Example 1: A high-line three-stage walking heating furnace in a steel plant, build a heat pipe heat exchange organic medium Rankine cycle medium and low temperature flue gas waste heat combined heat and power household system, the output power of the motor is 10Kw, and the supply is 45-50°C Sanitary hot water 600l / d.

[0025]This heat pipe heat exchange organic medium Rankine cycle medium and low temperature flue gas waste heat power generation system includes an alternative heat pipe heat exchange system, an organic working medium Rankine cycle loop, a medium and low temperature flue gas exhaust pipeline, a heating hot water loop and a cooling water loop The heat pipe heat exchange system is composed of heat pipe 2, flue gas heat exchanger 3 and drum 1, the evaporation section at the lower end of heat pipe 2 is placed in the flue gas heat exchanger 3, and the condensing section at the upper end is placed in the drum 1; Ken circulation circuit consists of liquid storage...

Embodiment 2

[0031] Example 2: This heat pipe heat exchange organic medium Rankine cycle medium and low temperature flue gas waste heat power generation system is the same as in Example 1. The organic Rankine cycle working fluid used is propane (R290), and the two-phase thermosiphon is 4.5m long. There are 1000 fins, each with 32 enhanced heat transfer fins on the upper and lower sections, and the thermosiphon is filled with 25% V (heat pipe volume) of softened desalted water.

Embodiment 3

[0032] Example 3: This heat pipe heat exchange organic medium Rankine cycle medium and low temperature flue gas waste heat power generation system is the same as in Example 1, and the organic Rankine cycle working fluids used are toluene, pentane (R601), tetrafluoroethane (R134a ), mixed according to the volume ratio of 30%, 25%, and 45%, respectively, the two-phase thermosiphon is 5.5m long, 900 in total, and each has 48 enhanced heat transfer fins on the upper and lower sections, and the thermosiphon is filled with 30% V (heat pipe volume) of softened desalted water.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28D15/02F01K27/02
Inventor 王辉涛陈蓉王华张竹明葛众
Owner KUNMING UNIV OF SCI & TECH
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