CN210505692U - Distributed tower type solar-driven supercritical carbon dioxide seawater desalination system - Google Patents
Distributed tower type solar-driven supercritical carbon dioxide seawater desalination system Download PDFInfo
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- CN210505692U CN210505692U CN201921287372.1U CN201921287372U CN210505692U CN 210505692 U CN210505692 U CN 210505692U CN 201921287372 U CN201921287372 U CN 201921287372U CN 210505692 U CN210505692 U CN 210505692U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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Abstract
The utility model discloses a distributed tower type solar-driven supercritical carbon dioxide seawater desalination system, which belongs to the field of seawater desalination; the outlet of the cold side of the high-temperature heat exchanger is divided into two paths, one path is connected with the inlet of the main expansion machine, and the other path is connected with the inlet of the secondary expansion machine; the outlets of the main expander and the secondary expander are converged and then enter the hot side of the condenser, and the outlet of the hot side of the condenser is connected with the inlet of the cold side of the high-temperature heat exchanger through the compressor; and a hot side outlet and an inlet of the high-temperature heat exchanger are respectively connected with an inlet and an outlet of a solar receiver in the tower type solar heat source system. The whole system is supplied with solar energy as a main energy source, high-pressure seawater is driven after energy conversion, and seawater desalination is realized through a reverse osmosis device; the carbon dioxide power output system has the advantages of small volume and high efficiency, the system flexibility is high, the physical property of the carbon dioxide is inactive, the requirement on the high-temperature component material of the system is lower than that of a water unit with the same temperature, and the operation safety is high.
Description
Technical Field
The utility model belongs to the technical field of the sea water desalination, specifically be a tower solar drive supercritical carbon dioxide sea water desalination of distributing type.
Background
Water is a necessity of human life and daily life and is also an important factor of industrial production and the like, but fresh water can be directly used and only accounts for 25 percent of a condenser of 0.3 percent of the total global water, and saline water accounts for 97.5 percent. The coastal areas of China are economically developed, densely populated and areas with the most water consumption per person, and a plurality of islands are distributed to supply fresh water. With the development of the urbanization process, the problem of shortage of fresh water resource supply is increasingly obvious; meanwhile, the island fresh water supply mainly comes from the land pipe network for long-distance transportation, and the cost is high.
The reverse osmosis seawater desalination system is a mainstream technology of current seawater desalination, and the distributed reverse osmosis seawater desalination system is an important way for fresh water supply in water-deficient areas, islands and the like, wherein the seawater temperature and pressure are important parameters influencing the seawater desalination efficiency. The tower-type concentrated solar energy is used as a heat source, the kinetic energy output by the coupled supercritical carbon dioxide system drives the seawater to be separated and desalinated at high pressure, the energy is efficiently converted through system coupling, and finally fresh water supply is realized. The reverse osmosis seawater desalination of the core part in the system takes differential pressure as power separation, the system and the part technology are mature, the demand on external energy is less, and the working medium carbon dioxide of the power output system has high temperature and is inactive; compared with a steam system with the same heat source temperature, the carbon dioxide power system has the advantages of small volume, high efficiency, higher system flexibility, short construction period, less investment, small occupied area and the like.
Therefore, a distributed tower type solar-driven supercritical carbon dioxide seawater desalination system needs to be developed, can be widely applied to distributed reverse osmosis seawater desalination, provides fresh water resources for coastal and island regions in China, and has wide application prospects.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the background art, the utility model provides a tower solar drive supercritical carbon dioxide sea water desalination of distributing type, its characterized in that comprises tower solar thermal energy source system, supercritical carbon dioxide power take off system and reverse osmosis sea water desalination system coupling, and wherein supercritical carbon dioxide power take off system includes: the system comprises a high-temperature heat exchanger, a main expander, a secondary expander, a compressor and a condenser; the outlet of the cold side of the high-temperature heat exchanger is divided into two paths, one path is connected with the inlet of the main expansion machine, and the other path is connected with the inlet of the secondary expansion machine; the outlets of the main expander and the secondary expander are converged and then enter the hot side of the condenser, and the outlet of the hot side of the condenser is connected with the inlet of the cold side of the high-temperature heat exchanger through the compressor; the hot side outlet and the inlet of the high-temperature heat exchanger are respectively connected with the inlet and the outlet of a solar receiver in the tower type solar heat source system, the cold side inlet of the condenser is connected with the outlet of a low-pressure pump in the reverse osmosis seawater desalination system, and the cold side outlet of the condenser is connected with the inlet of a high-pressure pump in the reverse osmosis seawater desalination system.
And a power output shaft of the main expansion machine is connected with a main shaft of the high-pressure pump.
And a power output shaft of the secondary expansion machine is connected with a main shaft of the low-pressure pump.
The tower-type solar heat source system comprises: the solar energy heat collector comprises a solar reflector, a tower, a solar energy receiver and a solar energy heat transmission pipeline; the solar energy reflecting mirrors are dispersedly arranged on the ground, the solar energy receiver is arranged on the ground through the tower, and the outlet and the inlet of the solar energy receiver are respectively connected with the inlet and the outlet of the cold side of the high temperature heat exchanger through a solar energy heat transmission pipeline.
The inlet of the low pressure pump is connected to a source of seawater.
The high-pressure pump is connected with the inlet of the reverse osmosis device, and the outlet of the reverse osmosis device is respectively connected with the fresh water tank and the waste water tank.
The beneficial effects of the utility model reside in that:
1. the whole system is supplied with solar energy as a main energy source, high-pressure seawater is driven after energy conversion, and seawater desalination is realized through a reverse osmosis device.
2. The carbon dioxide power output system has the advantages of small volume and high efficiency, the system flexibility is high, the physical property of the carbon dioxide is inactive, the requirement on the high-temperature component material of the system is lower than that of a water unit with the same temperature, and the operation safety is high.
3. The system and the components are mature in technology and have certain advantages in the aspects of short construction period, small occupied area and the like.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the distributed tower-type solar-driven supercritical carbon dioxide seawater desalination system of the present invention.
Wherein:
the system comprises a tower type solar heat source system, a 2-supercritical carbon dioxide power output system, a 3-reverse osmosis seawater desalination system, 11-solar reflectors, 12-towers, 13-solar receivers, 14-solar heat conveying pipelines, 15-sunlight light paths, 21-high-temperature heat exchangers, 22-main expanders, 23-secondary expanders, 24-compressors, 25-condensers, 31-high-pressure pumps, 32-low-pressure pumps, 33-reverse osmosis devices, 34-fresh water tanks, 35-waste water tanks and 36-seawater sources.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 the embodiment of the utility model discloses by tower solar thermal energy source system 1, supercritical carbon dioxide power output system 2 and reverse osmosis sea water desalination system 3 coupling constitute, wherein supercritical carbon dioxide power output system 2 includes: a high temperature heat exchanger 21, a main expander 22, a sub expander 23, a compressor 24, and a condenser 25; the outlet of the cold side of the high temperature heat exchanger 21 is divided into two paths, one path is connected with the inlet of the main expansion machine 22, and the other path is connected with the inlet of the secondary expansion machine 23; the outlets of the main expander 22 and the secondary expander 23 are converged and then enter the hot side of the condenser 25, and the outlet of the hot side of the condenser 25 is connected with the inlet of the cold side of the high-temperature heat exchanger 21 through the compressor 24; a hot side outlet and an inlet of the high-temperature heat exchanger 21 are respectively connected with an inlet and an outlet of a solar receiver 13 in the tower type solar heat source system 1, a cold side inlet of a condenser 25 is connected with an outlet of a low-pressure pump 32 in the reverse osmosis seawater desalination system 3, and a cold side outlet of the condenser 25 is connected with an inlet of a high-pressure pump 31 in the reverse osmosis seawater desalination system 3; the power output shaft of the main expander 22 is connected with the main shaft of the high-pressure pump 31, and the power output shaft of the secondary expander 23 is connected with the main shaft of the low-pressure pump 32;
the supercritical carbon dioxide power output system 2 pressurized by the compressor is heated and then is subjected to flow division expansion, the main expansion machine and the auxiliary expansion machine output kinetic energy to directly drive a seawater source pump to carry out low-pressure driving and high-pressure reverse osmosis desalination on seawater, the system is coupled with a tower type high-temperature concentrating solar system by utilizing a supercritical carbon dioxide Brayton cycle, and simultaneously, the heat of a condenser in the supercritical carbon dioxide system is utilized to preheat the seawater, so that the heat utilization efficiency of the whole system and the seawater desalination efficiency are improved.
In the embodiment, the supercritical carbon dioxide power output system 2 is a Brayton cycle, high-temperature and high-pressure carbon dioxide enters the main expander and the secondary expander for expansion after being shunted, and the output shaft power directly drives the compressor to work; and the expanded carbon dioxide flows into a condenser for cooling after being subjected to flow concentration, and finally enters a high-temperature heat exchanger through pressurization of a compressor to complete closed Brayton cycle.
In the embodiment, the supercritical carbon dioxide power output system 2 adopts two-stage expansion, and output power simultaneously realizes low-pressure seawater driving and high-pressure reverse osmosis seawater desalination; it is understood that the compression process and the heating process in the supercritical carbon dioxide power output system 2 can be implemented by multi-stage compression, multi-stage heating, and regenerative heating.
In the present embodiment, the power output shaft of the main expander 22 is mechanically and directly connected with the main shaft of the high-pressure pump 31, and the power output shaft of the secondary expander 23 is mechanically and directly connected with the main shaft of the low-pressure pump 32, specifically, belt transmission, gear transmission, universal joint transmission, or the like.
The tower-type solar heat source system 1 shown in fig. 1 includes: the solar energy heat exchanger comprises a solar energy reflector 11, a tower 12, a solar energy receiver 13 and a solar energy heat transmission pipeline 14, wherein the solar energy reflector 11 is dispersedly installed on the ground which can be directly irradiated by the sun, no shielding object is arranged between the solar energy reflector 11 and the solar energy receiver 13, the solar energy receiver 13 is installed on the ground through the tower 12, and the outlet and the inlet of the solar energy receiver 13 are respectively connected with the inlet and the outlet of the cold side of a high temperature heat exchanger 21 through the solar energy heat transmission pipeline 14 to form a loop; the sunlight light path 15 is reflected by the solar reflector 11 and then is gathered in the solar receiver 13 to realize a high-temperature energy heat source, and the high-temperature energy heat source exchanges heat with high-pressure carbon dioxide in the high-temperature heat exchanger 21 through the solar heat conveying pipeline 14;
the heat source provided for the high-temperature heat exchanger 21 is renewable solar energy, the high-temperature heat source at 600-700 ℃ is provided in a tower type light condensation mode, and then the heat exchange is carried out between the high-temperature heat exchanger and a carbon dioxide working medium.
The reverse osmosis seawater desalination system 3 shown in fig. 1 comprises: the system comprises a low-pressure pump 32, a seawater source 36, a high-pressure pump 31, a reverse osmosis device 33, a fresh water tank 34 and a waste water tank 35, wherein the seawater source 36 is connected with an inlet of the low-pressure pump 32, the high-pressure pump 31 is connected with an inlet of the reverse osmosis device 33, and an outlet of the reverse osmosis device 33 is respectively connected with the fresh water tank 34 and the waste water tank 35;
seawater in the reverse osmosis seawater desalination system 3 firstly enters a condenser to be heated under the driving of a low-pressure pump, then enters reverse osmosis membrane equipment to be desalinated after being pressurized by a high-pressure pump, and separated fresh water and waste water are respectively stored.
In this embodiment, the seawater in the reverse osmosis seawater desalination system 3 is used as a cold source of the cooler in the supercritical carbon dioxide power output system 2, and the desalination seawater temperature is increased and the carbon dioxide working medium temperature in the power system is reduced.
The seawater is driven by a low pressure pump to firstly enter a condenser for heat exchange, then enters a reverse osmosis device after being pressurized by a high pressure compressor to separate fresh water and high-concentration wastewater, and is respectively stored.
The utility model discloses a work flow does:
sunlight is gathered in the solar receiver 13 after passing through the solar reflector 11, so that a high-temperature energy heat source is formed and enters the high-temperature heat exchanger 21 through the heat conveying pipeline 14;
the gaseous carbon dioxide working medium is pressurized in the compressor 24 and then enters the high-temperature heat exchanger 21 for heating, the high-temperature high-pressure carbon dioxide is shunted and enters the main expander 22 and the secondary expander 23 for expansion and output of shaft work, and the shaft work drives the high-pressure compressor and the low-pressure compressor to work respectively; after expansion, the carbon dioxide flows in a condenser 25 to be cooled and then enters a compressor 24 to complete Brayton power cycle;
the seawater is driven by a low-pressure pump 32 and then enters a carbon dioxide Brayton cycle condenser 25 for heat exchange, the purposes of heating the seawater to 40 ℃ and reducing the carbon dioxide are achieved, the preheated seawater is pressurized to 6Mpa by a high-pressure pump 31 and enters a reverse osmosis device 33 for separation, drinkable fresh water enters a fresh water tank 34 for storage, and high-concentration wastewater enters a wastewater tank 35.
After a heat source system, a carbon dioxide Brayton power system and a seawater desalination system are coupled through component equipment, clean solar energy is used as a heat source, energy conversion is realized through carbon dioxide Brayton cycle, and then seawater reverse osmosis desalination is performed. Meanwhile, the carbon dioxide power output system has the advantages of small volume, high efficiency and high flexibility, the physical property of the carbon dioxide is inactive, the material requirement of high-temperature components of the system is lower than that of a water unit with the same heat source temperature, and the system safety is high.
Claims (6)
1. The utility model provides a distributed tower solar drive supercritical carbon dioxide sea water desalination, its characterized in that comprises tower solar thermal energy source system (1), supercritical carbon dioxide power take off system (2) and reverse osmosis sea water desalination (3) coupling, and wherein supercritical carbon dioxide power take off system (2) includes: a high temperature heat exchanger (21), a main expander (22), a secondary expander (23), a compressor (24) and a condenser (25); the outlet of the cold side of the high-temperature heat exchanger (21) is divided into two paths, one path is connected with the inlet of the main expansion machine (22), and the other path is connected with the inlet of the secondary expansion machine (23); the outlets of the main expander (22) and the secondary expander (23) are converged and then enter the hot side of the condenser (25), and the outlet of the hot side of the condenser (25) is connected with the cold side inlet of the high-temperature heat exchanger (21) through the compressor (24); a hot side outlet and an inlet of the high-temperature heat exchanger (21) are respectively connected with an inlet and an outlet of a solar receiver (13) in the tower type solar heat source system (1), a cold side inlet of the condenser (25) is connected with an outlet of a low-pressure pump (32) in the reverse osmosis seawater desalination system (3), and a cold side outlet of the condenser (25) is connected with an inlet of a high-pressure pump (31) in the reverse osmosis seawater desalination system (3).
2. The distributed tower type solar-driven supercritical carbon dioxide seawater desalination system as defined in claim 1, wherein a power output shaft of the main expander (22) is connected with a main shaft of the high-pressure pump (31).
3. The distributed tower type solar-driven supercritical carbon dioxide seawater desalination system as claimed in claim 1, wherein the power output shaft of the secondary expansion machine (23) is connected with the main shaft of the low-pressure pump (32).
4. The distributed tower-type solar-driven supercritical carbon dioxide seawater desalination system as defined in claim 1, wherein the tower-type solar heat source system (1) comprises: the solar energy heat exchanger comprises a solar reflector (11), a tower (12), a solar receiver (13) and a solar heat conveying pipeline (14), wherein the solar reflector (11) is dispersedly installed on the ground, the solar receiver (13) is installed on the ground through the tower (12), and an outlet and an inlet of the solar receiver (13) are respectively connected with an inlet and an outlet of the cold side of a high-temperature heat exchanger (21) through the solar heat conveying pipeline (14).
5. The distributed tower solar-driven supercritical carbon dioxide desalination system as defined in claim 1 wherein the inlet of the low pressure pump (32) is connected to a source of seawater (36).
6. A distributed tower solar-driven supercritical carbon dioxide desalination system as claimed in claim 1 wherein the high pressure pump (31) is connected to the inlet of a reverse osmosis unit (33) and the outlet of the reverse osmosis unit (33) is connected to a fresh water tank (34) and a waste water tank (35) respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921287372.1U CN210505692U (en) | 2019-08-09 | 2019-08-09 | Distributed tower type solar-driven supercritical carbon dioxide seawater desalination system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921287372.1U CN210505692U (en) | 2019-08-09 | 2019-08-09 | Distributed tower type solar-driven supercritical carbon dioxide seawater desalination system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111946411A (en) * | 2020-07-30 | 2020-11-17 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Supercritical carbon dioxide energy storage system for ship |
| CN112627925A (en) * | 2020-12-28 | 2021-04-09 | 中国长江三峡集团有限公司 | Flexible power station based on combination of supercritical carbon dioxide power cycle and seawater desalination and adjusting method thereof |
-
2019
- 2019-08-09 CN CN201921287372.1U patent/CN210505692U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111946411A (en) * | 2020-07-30 | 2020-11-17 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Supercritical carbon dioxide energy storage system for ship |
| CN111946411B (en) * | 2020-07-30 | 2023-01-03 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Supercritical carbon dioxide energy storage system for ship |
| CN112627925A (en) * | 2020-12-28 | 2021-04-09 | 中国长江三峡集团有限公司 | Flexible power station based on combination of supercritical carbon dioxide power cycle and seawater desalination and adjusting method thereof |
| CN112627925B (en) * | 2020-12-28 | 2023-03-10 | 中国长江三峡集团有限公司 | Flexible power station based on combination of supercritical carbon dioxide power cycle and seawater desalination and adjusting method thereof |
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Granted publication date: 20200512 Termination date: 20210809 |