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Dual-pressure expansion organic rankine cycle (ORC) mid-low-temperature waste heat recovery power generation system

A circulation system and low-temperature waste heat technology, applied in the field of energy and environment, to achieve the effects of reducing liquid delivery pumps, efficient cascade utilization, and simplifying the system

Active Publication Date: 2018-06-15
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Another part of the saturated liquid organic working fluid enters the flasher after throttling and decompression

Method used

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  • Dual-pressure expansion organic rankine cycle (ORC) mid-low-temperature waste heat recovery power generation system
  • Dual-pressure expansion organic rankine cycle (ORC) mid-low-temperature waste heat recovery power generation system

Examples

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Effect test

Embodiment 1

[0021] Such as figure 1 As shown, the dual-pressure expansion organic Rankine cycle recovery medium and low temperature waste heat power generation system includes a low-pressure organic Rankine cycle system, a high-pressure organic Rankine cycle system and connected pipelines and accessories; a low-pressure organic Rankine cycle system , The high-pressure organic Rankine cycle system includes ORC waste heat boiler 1, ORC waste heat boiler 1 is divided into preheating section, evaporation section and superheating section;

[0022] The low-pressure organic Rankine cycle system includes a preheating section of the ORC waste heat boiler 1, a pressure reducing valve 4, a flash evaporator 5, a screw expander 6, a generator 3, a condenser 7, a condensation pump 8, a jet compressor 9 and connections The composition of piping accessories; the high-pressure organic Rankine cycle system includes the evaporation section and superheat section of the ORC waste heat boiler 1, the centripetal tu...

Embodiment 2

[0028] Such as figure 1 As shown, the dual-pressure expansion organic Rankine cycle recovery medium and low temperature waste heat power generation system includes a low-pressure organic Rankine cycle system, a high-pressure organic Rankine cycle system and connected pipelines and accessories; a low-pressure organic Rankine cycle system , The high-pressure organic Rankine cycle system includes ORC waste heat boiler 1, ORC waste heat boiler 1 is divided into preheating section, evaporation section and superheating section;

[0029] The low-pressure organic Rankine cycle system includes a preheating section of the ORC waste heat boiler 1, a pressure reducing valve 4, a flash evaporator 5, a screw expander 6, a generator 3, a condenser 7, a condensation pump 8, a jet compressor 9 and connections The composition of piping accessories; the high-pressure organic Rankine cycle system includes the evaporation section and superheat section of the ORC waste heat boiler 1, the centripetal tu...

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Abstract

The invention relates to a dual-pressure expansion organic rankine cycle (ORC) mid-low-temperature waste heat recovery power generation system and belongs to the technical field of energy and environments. According to the system, mid-low-temperature waste heat flue gas with the temperature being 200-350 DEG C is utilized as the driving heat source, organic working medium feeding liquid is preheated to be in a saturated liquid state in an ORC waste heat boiler preheating segment, then part of a saturated liquid organic working medium enters an evaporation segment and an superheating segment ofa waste heat boiler, generated saturated (or superheated) steam enters a radial-inward-flow turbine, and a high-pressure stage ORC expansion work doing process is completed; and the other part of thesaturated liquid organic working medium enters a flash vessel after being subjected to throttling and pressure reducing, saturated steam separated from the flash vessel enters a low-pressure stage screw expander, and a low-pressure stage ORC expansion work doing process is completed. An ejection compressor recovers the liquid-phase working medium separated out of the flash vessel, utilization ofliquid conveying pumps is reduced, the system is simplified, and the possibility of pump cavitation is eliminated.

Description

Technical field [0001] The invention relates to a double-pressure expansion organic Rankine cycle recovery medium and low temperature waste heat power generation system, which belongs to the technical field of energy and environment. Background technique [0002] my country has a large amount of waste heat resources, especially all kinds of flue gas waste heat resources have the characteristics of high recovery feasibility and good economy. In the production process of many high-energy-consuming industries such as steel, cement, caustic soda, synthetic ammonia, glass, sulfuric acid, calcium carbide, etc., many medium and low temperature waste heat are not recycled, and the development and utilization potential of medium and low temperature flue gas waste heat alone exceeds 100 million. Tons of standard coal. At present, many theoretical studies and engineering practices have proved that the Organic Rankine Cycle (ORC) is an important technology for efficient recovery of medium a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K27/02F01K11/02F01K7/02
CPCF01K7/02F01K11/02F01K27/02
Inventor 王辉涛黄靖伦王建军朱道飞王华韩金蓉赵玲玲王维蔚
Owner KUNMING UNIV OF SCI & TECH
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