A multi-stage low-temperature waste heat recovery system based on supercritical carbon dioxide

A waste heat recovery system, carbon dioxide technology, applied in the direction of indirect carbon dioxide emission reduction, heat exchanger, indirect heat exchanger, etc., can solve the waste heat loss of waste heat flue gas, the low efficiency of regenerative heat exchanger, and the low efficiency of recycling Low-temperature waste heat and other problems, to achieve the effect of improving cycle efficiency, improving waste heat recovery efficiency, and improving waste heat utilization efficiency

Active Publication Date: 2022-03-04
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The system aims to solve the problems of a large amount of flue gas waste heat loss and the ineffective recovery and utilization of low-temperature waste heat due to the low efficiency of the regenerative heat exchanger in the existing waste heat recovery system and the waste heat is only used in a single stage.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A multi-stage low-temperature waste heat recovery system based on supercritical carbon dioxide
  • A multi-stage low-temperature waste heat recovery system based on supercritical carbon dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A multi-stage low-temperature waste heat recovery system based on supercritical carbon dioxide provided by a preferred embodiment of the present invention includes a carbon dioxide high-pressure turbine 1, a carbon dioxide medium-pressure turbine 2, a carbon dioxide low-pressure turbine 3, a primary reheater 4, two Secondary reheater 5, first stage regenerator 6, second stage main regenerator 7, third stage regenerator 8, second stage auxiliary regenerator 13, low pressure economizer 14, high pressure economizer 15. The second-stage sub-condenser 16, the second-stage sub-compressor 17, the low-temperature heat exchanger 18, the air preheater 30, and the third-stage main condenser 31;

[0029]The carbon dioxide high-pressure turbine 1, the carbon dioxide medium-pressure turbine 2, and the carbon dioxide low-pressure turbine 3 are connected in sequence, and the boiler primary reheater 4 is connected between the carbon dioxide high-pressure turbine 1 and the carbon dioxide ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a multi-stage low-temperature waste heat recovery system based on supercritical carbon dioxide, including a supercritical carbon dioxide multi-stage waste heat recovery cycle system, and a new heat exchange system that provides cold sources for the entire system; the new heat exchange system includes The first-stage new heat exchanger is installed. The carbon dioxide in the low-temperature heat exchanger exchanges heat with the circulating cooling medium through the first-stage new heat exchanger, and the carbon dioxide from the first-stage new heat exchanger enters through the large temperature difference heat exchange unit. to the second-stage new heat exchanger, and conduct heat exchange with the circulating cooling liquid, and finally form a low-temperature carbon dioxide working fluid and return to the low-temperature heat exchanger for heat exchange with low-temperature flue gas, and carry out the next stage of circulation. The low-low temperature multi-stage waste heat recovery and utilization system with critical carbon dioxide as the working fluid, after heat exchange at 6 places in the first-stage regenerator, the high-temperature working medium is divided into two paths, which improves the efficiency of waste heat utilization.

Description

technical field [0001] The invention belongs to the field of waste heat recovery, and relates to a multi-stage low-temperature waste heat recovery system based on supercritical carbon dioxide. Background technique [0002] At present, waste heat power generation is a good way to solve energy recovery, which not only saves energy but also is beneficial to environmental protection. Waste heat power generation is mainly a technology that converts excess heat energy generated in the production process into electrical energy. According to the survey, the total waste heat resources of various industries account for about 17% to 67% of their total fuel consumption, and the recyclable waste heat resources are about 60% of the total waste heat resources. At present, high-temperature and medium-temperature waste heat can be recycled and utilized very well. The low-temperature waste heat recovery technology is complicated, and it is difficult to recover low-temperature waste heat. In ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): F28D21/00F23L15/00F01K25/10
CPCF28D21/0014F23L15/00F01K25/103Y02E20/34
Inventor 徐尚龙郑师晨颛孙壮志叶鑫龙
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap