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

A low-temperature flue gas, waste heat power generation technology, applied in the energy and environment fields, can solve the problems of difficulty in replacing the riser and descender pipes of the boiler, unfavorable system normal operation and cost control, waste of organic working medium and heat exchange efficiency, etc. The effect of occupying space, reducing heat loss, and fully utilizing heat energy

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

[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 me

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Example 1: A high-line three-stage walking heating furnace in a steel plant, build a set of tube-type heat pipe organic medium evaporation medium and low temperature flue gas waste heat power generation combined supply household system, the output power of the motor is 10Kw, supply 45 ~ 50 ℃ sanitary Hot water 600l / d.

[0024]The casing type heat pipe organic medium evaporates medium and low temperature flue gas waste heat power generation system, including heat pipe heat exchange system, organic working medium Rankine cycle loop, medium and low temperature flue gas exhaust pipeline, heating hot water loop and cooling water loop; heat pipe The heat exchange system includes a heat pipe 2, a flue gas heat exchanger 3 and a drum 1. The flue gas heat exchanger 3 and the drum 1 are a vertical integrated casing structure, and the tubular flue gas heat exchanger 3 is jacketed on the drum 1. Above; the heat pipe 2 is a thermosiphon with fins for enhancing heat transfer on the e...

Embodiment 2

[0030] Example 2: This sleeve-type heat pipe 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

[0031] Embodiment 3: This sleeve-type heat pipe organic medium evaporation medium and low temperature flue gas waste heat power generation system is the same as that of Embodiment 1, and the organic Rankine cycle working fluids used are toluene, pentane R601, and tetrafluoroethane R134a, respectively by 30 %, 25%, 45% by volume; the thermosiphon is vertically inclined at 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 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...

Claims

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Application Information

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IPC IPC(8): F28D15/02F01K11/02F01K25/10F01K17/02
CPCY02E20/14
Inventor 王辉涛陈蓉王华张竹明葛众
Owner KUNMING UNIV OF SCI & TECH
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