Title:
LOW-TEMPERATURE CARBON CAPTURE COUPLING COLD ENERGY AND WASTE HEAT GRADIENT UTILIZATION SYSTEM FOR LNG-POWERED VESSEL
Document Type and Number:
WIPO Patent Application WO/2024/011780
Kind Code:
A1
Abstract:
A low-temperature carbon capture coupling cold energy and waste heat gradient utilization system for an LNG-powered vessel. The system comprises: an LNG evaporation side, wherein an LNG serves as a cold source of a first two-stage cascaded Rankine cycle, and after first-stage pressurization, first-stage heat exchange, second-stage pressurization, second-stage heat exchange and seawater temperature adjustment are performed, an NG is formed and then sent to an engine; an air side, wherein liquid oxygen is prepared by means of a low-temperature rectification method, cold energy of an air separation product is reused for air cooling and carbon capture, and the liquid oxygen is regasified and then sent to the engine; and a flue gas side, wherein after an exhaust-driven gas turbine does work on a flue gas discharged by a main engine, heat energy is provided for a second two-stage cascaded Rankine cycle, and then, after fourth-stage heat exchange and seawater cooling on the flue gas side are performed, water is separated out and then shunted, with one path being sent to the engine, and the other path being pressurized and then captured by means of low-temperature liquefaction. When a gas intake condition of a vessel is met, an oxygen-enriched combustion system for a main engine is constructed, and carbon dioxide in a discharged flue gas can be efficiently captured while cold energy and waste heat of a large vessel are fully recycled, thereby achieving the aim of energy conservation and emission reduction.
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Inventors:
YAO SHOUGUANG (CN)
LI CHEN (CN)
LI CHEN (CN)
Application Number:
PCT/CN2022/126053
Publication Date:
January 18, 2024
Filing Date:
October 19, 2022
Export Citation:
Assignee:
UNIV JIANGSU SCIENCE & TECH (CN)
International Classes:
F02M21/02; F01K7/02; F01K13/00; F01K15/04; F01K25/14; F25J3/04
Foreign References:
| CN115263466A | 2022-11-01 | |||
| CN113738467A | 2021-12-03 | |||
| CN113188291A | 2021-07-30 | |||
| CN109184837A | 2019-01-11 | |||
| CN113309985A | 2021-08-27 | |||
| FR2869404A1 | 2005-10-28 | |||
| CN109813054A | 2019-05-28 | |||
| CN115013194A | 2022-09-06 | |||
| JP2015161244A | 2015-09-07 |
Attorney, Agent or Firm:
NANJING SUGAO PATENT AND TRADEMARK FIRM (ORDINARY PARTNERSHIP) (CN)
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