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Power generation system for waste heat of medium and low temperature flue gas with cylinder organic medium evaporation

A low-temperature flue gas and waste heat power generation technology, which is applied in the energy and environment fields, can solve the problems of low heat exchange efficiency, boiler heat exchange pipes are easily corroded by flue gas, etc., so as to reduce the occupied space, facilitate heat exchange efficiency, The effect of shortening the length

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

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a cylindrical organic medium evaporation medium and low temperature flue gas waste heat power generation system, which adopts an integrated cylindrical structure divided into a drum and a flue gas heat exchanger through a partition, and replaces the rising of the boiler with a heat pipe. Tubes and downcomers to solve the problems that the boiler heat exchange pipes are susceptible to flue gas erosion and corrosion, and the heat exchange efficiency is not high

Method used

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  • Power generation system for waste heat of medium and low temperature flue gas with cylinder organic medium evaporation
  • Power generation system for waste heat of medium and low temperature flue gas with cylinder organic medium evaporation

Examples

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Embodiment 1

[0025] Example 1: A high-line three-stage walking heating furnace in a steel plant, build a cylindrical organic medium evaporation medium and low temperature flue gas waste heat power generation co-supply household system, the output power of the motor is 10Kw, supply 45 ~ 50 ℃ sanitary heat Water 600l / d.

[0026] This cylindrical organic medium evaporation medium and low temperature flue gas waste heat power generation system includes a heat pipe heat exchange system, an organic working fluid Rankine cycle loop, a medium and low temperature flue gas exhaust pipeline, a heating hot water loop and a cooling water loop; The heat system includes the heat pipe 2 replacing the riser and downcomer of the boiler, the flue gas heat exchanger 4 and the drum 1, and the flue gas heat exchanger 4 and the drum 1 are horizontally arranged integrated cylindrical structures, in the middle of which there are two The first layer of heat-insulating partition 3 is divided into the upper drum 1 and ...

Embodiment 2

[0032] Example 2: This cylindrical organic medium evaporation medium and low temperature flue gas waste heat power generation system is the same as Example 1, and the organic Rankine cycle working fluid used is propane R290; the thermosiphon is vertically inclined at 30 0 For the setting, a total of 1000 two-phase thermosiphons are used, each tube is 4.5m long, and there are 32 enhanced heat transfer fins on the upper and lower sections respectively; the thermosiphon tubes are filled with 25% V (heat pipe volume) softened desalted water.

Embodiment 3

[0033] Example 3: This cylindrical organic medium evaporation medium and low temperature flue gas waste heat power generation system is the same as that of Example 1, and the organic Rankine cycle working fluids used are toluene, pentane R601, and tetrafluoroethane R134a, respectively at 30% , 25%, 45% volume ratio mixed; thermosiphon vertically inclined 50 0 For the setup, a total of 900 two-phase thermosiphons are used, each of which is 5.5m long and has 48 enhanced heat transfer fins on the upper and lower sections respectively; the thermosiphon is filled with 30% V (heat pipe volume) 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 cylinder organic medium evaporation, and belongs to the technical field of energy and environment. The invention comprises a heat pipe 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 flue gas heat exchanger and the boiler cylinder are an integrally cylindrical structure, and is separated to the upper boiler cylinder and the lower flue gas heat exchanger by two layers of insulation partition, the lower end of the heat pipe is arranged in flue gas heat exchanger, the upper end is arranged in the boiler barrel, toluene, dichlorotrifluoroethane, propane and pentafluoropropane are used as working medium, and 20% volume of the softening desalted water is used as the heat pipe working fluid. The invention has advantages of little space occupation, small heat exchange between heat pipe and air, high efficiency of heat exchange, convenient heat pipe replacement, being capable of avoiding the heat exchanger pipe corrosion and the working medium leakage and other advantages, and being capable of adjusting the exhaust regenerative heat of organic Rankine cycle according to the heating load demands.

Description

technical field [0001] The invention relates to a cylindrical 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 performs heat exchange through the boiler's ascending tube and downcomer. 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 round tube with fins or no fins, and its main structural features are shown in the tube. A heat pipe consists of a shell, a capillary porous material (core) and a vapo...

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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