US 12,253,011 B2
Flexible power plant based on supercritical carbon dioxide power circulation in combination with seawater desalination and control method of same
Xinxing Lin, Beijing (CN); Likun Yin, Beijing (CN); Qian Wang, Beijing (CN); and Wen Su, Changsha (CN)
Assigned to CHINA THREE GORGES CORPORATION, (CN); and CENTRAL SOUTH UNIVERSITY, (CN)
Appl. No. 18/258,832
Filed by CHINA THREE GORGES CORPORATION, Beijing (CN); and CENTRAL SOUTH UNIVERSITY, Changsha (CN)
PCT Filed Sep. 28, 2021, PCT No. PCT/CN2021/121402
§ 371(c)(1), (2) Date Jun. 22, 2023,
PCT Pub. No. WO2022/037711, PCT Pub. Date Feb. 24, 2022.
Claims priority of application No. 202011578173.3 (CN), filed on Dec. 28, 2020; and application No. 202023213436.9 (CN), filed on Dec. 28, 2020.
Prior Publication US 2024/0295180 A1, Sep. 5, 2024
Int. Cl. F01K 25/10 (2006.01); C02F 1/06 (2023.01); C02F 103/08 (2006.01); F01K 7/32 (2006.01); F01K 23/06 (2006.01)
CPC F01K 25/103 (2013.01) [F01K 7/32 (2013.01); F01K 23/064 (2013.01); C02F 1/06 (2013.01); C02F 2103/08 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A flexible power plant based on supercritical carbon dioxide power circulation in combination with seawater desalination, comprising a heat source circulation system, a thermodynamic circulation system, a desalination system and a control system;
wherein said heat source circulation system is connected to said thermodynamic circulation system and said seawater desalination system, and provides heat source required for their operations, respectively;
said control system is simultaneously connected to respective actuators of said heat source circulation system, said thermodynamic circulation system and said seawater desalination system, and controls their operations, correspondingly;
wherein said heat source circulation system includes a boiler (7), a heat storing tank (8), a CO2 heater (3a), a CO2 preheater (3b), a seawater heater (6a), a 2nd bypass valve (10o), a 6th 3-way valve (10g), a 7th 3-way valve (10h), a 8th 3-way valve (10i), a 9th 3-way valve (10j), a 10th 3-way valve (10k), a 11th 3-way valve (10l), a 12th 3-way valve (10m), a 13th 3-way valve (10n), a first intermediate working medium pump (11a), a second intermediate working medium pump (11b) and accessory pipelines;
the boiler (7) is an original heat source of said heat source circulation system, the boiler (7) is connected in series with the CO2 heater (3a) and the CO2 preheater (3b), and provides heat for said thermodynamic circulation system; the boiler (7) is connected to the seawater heater (6a) and provides heat for said desalination system;
the heat storing tank (8) is connected in parallel on both sides of the in-series heat exchanger group composed of the CO2 heater (3a) and the CO2 preheater (3b) to adjust a mismatch between thermal inertia and the load of the CO2 heater (3a) and the CO2 preheater (3b) in the heat exchange process of the boiler;
the first intermediate working medium pump (11a) and the second intermediate working medium pump (11b) are connected to said thermodynamic circulation system and the heat storing tank (8), respectively, and are used to adjust the flow allocation of said thermodynamic circulation system and the heat storing tank (8), respectively; the 12th 3-way valve (10m), the 13th 3-way valve (10n) and the 2nd bypass valve (10o) are connected in parallel with the second intermediate working medium pump (11b), and achieve absorbing and releasing from/into the heat storing tank (8) and adjusting flow volume;
the 8th 3-way valve (10i) and the 9th 3-way valve (10j) are used to bypass the high-temperature side of the CO2 heater (3a) and the 10th 3-way valve (10k) and the 11th three-way valve (10l) are used to bypass the high-temperature side of the CO2 preheater (3b), so as to achieve flexibly controlling thermodynamic circulation in a wide range.