Vertical heat pipe organic medium evaporation medium and low temperature flue gas waste heat power generation system

A low-temperature flue gas and waste heat power generation technology, which is applied in the field of energy and environment, can solve the problems of difficult replacement of heat exchange pipes, waste of organic working fluid, and decline in heat exchange efficiency, so as to meet process requirements, fully utilize heat energy, and improve heat transfer efficiency. The effect of thermal efficiency

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

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Problems solved by technology

[0007] The purpose of the present invention is to provide a vertical heat pipe organic medium evaporation medium and low temperature flue gas waste heat power generation system, which uses vertical inclined heat pipes to replace the ascending pipe and descending pipe of the boiler, so as to solve the difficulty in replacing the boiler heat exchange pipe and the corrosion of flue gas The resulting decrease in heat transfer efficiency and waste of organic working fluid

Method used

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  • Vertical heat pipe organic medium evaporation medium and low temperature flue gas waste heat power generation system
  • Vertical heat pipe organic medium evaporation medium and low temperature flue gas waste heat power generation system

Examples

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Embodiment 1

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

[0026] The vertical heat pipe organic medium evaporation medium and low temperature flue gas waste heat power generation system includes a heat pipe heat exchange system, an organic working medium Rankine cycle, a medium and low temperature flue gas exhaust pipe, a heating and hot water circuit and a cooling water circuit; The heat system consists of 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 arranged vertically, and the heat pipe 2 is a vertical inclined 60 0 For the two-phase thermosiphon set, the evaporation section at the lower end is placed in the flue gas heat exchanger 3, and the condensation ...

Embodiment 2

[0032] Example 2: This vertical 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 medium used is propane R290; the thermosiphon is vertically inclined 30 0 Set up, adopt two-phase thermosiphon, a total of 1000, each pipe is 4.5m long, and there are 32 enhanced heat transfer fins on the upper and lower sections respectively; the thermosiphon is filled with 25% V (heat pipe volume) softened and desalinated water.

Embodiment 3

[0033] Example 3: This vertical 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 fluids used are toluene, pentane R601, and tetrafluoroethane R134a, respectively 30% , 25%, 45% volume ratio; the thermosiphon is vertically inclined 50 0 Set up, using two-phase thermosiphon, a total of 900, each tube is 5.5m long, and there are 48 enhanced heat transfer fins on the upper and lower sections respectively; the thermosiphon is filled with 30% V (heat pipe volume) softened and desalinated water.

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Abstract

The invention provides a vertical heat pipe organic medium evaporation medium and low temperature flue gas waste heat power generation system, and belongs to the technical fields of energy and environment. The system comprises a heat pipe heat exchange system, an organic Rankine cycle working medium circulating circuit, a medium and low temperature flue gas discharge pipeline, a heat supply hot water circuit and a cooling water circuit. Heat pipes are adopted to replace a riser and a down pipe of a boiler; the heat pipe heat exchange system consists of the heat pipes, a flue gas heat exchanger and a boiler barrel; the flue gas heat exchanger and the boiler barrel are vertically arranged; the heat pipes are vertically obliquely arranged; the lower evaporation section of the heat pipe is arranged in the flue gas heat exchanger, and the upper condensation section of the heat pipe is arranged in the boiler barrel; and cycle fluid such as methylbenzene, dichlorotrifluoroethane, propane, 1,1,1,3,3-pentafluoropropane and the like is used, and a working solution of the heat pipes is softened desalted water in an amount which is 20 percent of the volume of the heat pipes. The invention has the advantages that: the heat exchange efficiency is high, the heat pipes are convenient to replace, phenomena that the heat exchange efficiency is influenced and the working medium is leaked because the heat pipes are corroded and difficult to replace can be avoided and the like; and the exhaust heat recovery amount of the organic Rankine cycle can be adjusted according to heating load requirements.

Description

technical field [0001] The invention relates to a vertical 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 adopts the rising pipe and descending pipe of the boiler 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 fluid to leak into the flue gas. It will lead to waste of organic working fluid and decrease of heat exchange efficiency, and it is very difficult to replace the rising pipe and descending pipe of the boiler, 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. From its appearance, it is usually an ordinary round tube with ...

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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