CN107098421B - System for desalinating product water with sea water - Google Patents
System for desalinating product water with sea water Download PDFInfo
- Publication number
- CN107098421B CN107098421B CN201710280842.0A CN201710280842A CN107098421B CN 107098421 B CN107098421 B CN 107098421B CN 201710280842 A CN201710280842 A CN 201710280842A CN 107098421 B CN107098421 B CN 107098421B
- Authority
- CN
- China
- Prior art keywords
- seawater desalination
- low
- desalination device
- heat exchanger
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention relates to a system for desalinating product water from seawater, which comprises a low-temperature multi-effect distilled seawater desalination device (1), wherein the low-temperature multi-effect distilled seawater desalination device (1) provides working steam through a nuclear energy steam system (2), an intermediate heat exchanger (3) and a flash tank (4) are arranged between the low-temperature multi-effect distilled seawater desalination device (1) and the steam system (2), and the intermediate heat exchanger (3) is used for converting gas pumped out of the steam system (2) into liquid; the flash tank (4) is used for converting liquid in the intermediate heat exchanger (3) into working steam used by the multi-effect distillation seawater desalination device (1). The system can ensure that the product water desalinated by the low-temperature multi-effect distilled seawater desalination device does not have radioactivity, can be used as commercial distilled water to be supplied to the outside, and ensures drinking water of coastal residents.
Description
Technical Field
The invention belongs to the field of seawater treatment, and particularly relates to a system for desalinating seawater into product water.
Background
Although the radioactive monitoring systems are arranged in the blowdown system and the condenser of the steam generator, the radioactive pollution condition in the steam of the two loops is monitored. However, the radioactivity monitoring system has a threshold limit below which radioactive contamination is not monitored. On the other hand, in consideration of the economy of the nuclear power plant, when radioactive contamination is detected in the secondary loop steam but is below the limit value, the nuclear power plant continues to operate and the steam generator is overhauled during a routine shutdown. A certain amount of radioactive contaminants will be present in the secondary loop steam during operation of the nuclear power plant. Because the steam of the two loops is directly used as the steam source of the steam turbine generator unit, the concentration of radioactive pollutants in the extracted steam of the steam turbine is consistent with that of the steam of the two loops.
At present, a nuclear power station directly uses steam extracted by a steam turbine as working steam of a low-temperature multi-effect distillation (MED) seawater desalination device. The low temperature Multiple Effect Distillation (MED) seawater desalination plant cannot ensure that the heat transfer surface does not leak slightly. The first safety barrier-fuel clad and the second safety barrier-reactor coolant system of a nuclear power plant still cannot completely avoid leakage and radioactive release during normal operation. Radioactive substances may enter the secondary loop steam through the leaked fuel cladding and the steam generator, enter the low-temperature multi-effect distillation (MED) seawater desalination device along with the steam extracted by the steam turbine, and may contaminate the desalinated product water through the heat transfer surface of the leaked seawater desalination device. Therefore, product water desalinated by a low-temperature multi-effect distillation (MED) seawater desalination device used in the current nuclear power plant can only be used as raw seawater desalted in the nuclear power plant.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a system for desalinating product water from seawater, which ensures that the desalinated product water has no radioactivity and can be supplied to the outside as commercial distilled water, and solves the problem that the desalinated product water of a low-temperature multi-effect distillation seawater desalination device can only be used as raw desalted water.
In order to achieve the above purposes, the invention adopts the technical scheme that: the system for desalinating the seawater product water comprises a low-temperature multi-effect distillation seawater desalination device, wherein the low-temperature multi-effect distillation seawater desalination device provides working steam through a nuclear energy steam system, an intermediate heat exchanger and a flash tank are arranged between the low-temperature multi-effect distillation seawater desalination device and the steam system, and the intermediate heat exchanger is used for converting gas pumped out of the steam system into liquid; the flash tank is used for converting liquid in the intermediate heat exchanger into working steam of the multi-effect distillation seawater desalination device.
Furthermore, a booster pump capable of improving the lateral pressure of the low-temperature multi-effect distilled seawater desalination device is arranged between the low-temperature multi-effect distilled seawater desalination device and the intermediate heat exchanger.
Further, the gas flashed in the flash tank enters a low-temperature multi-effect distillation seawater desalination device through a pipeline to provide working steam for seawater desalination; the liquid that does not flash, leaves the flash tank and enters the booster pump, maintaining the operation of the intermediate loop.
Furthermore, the steam in the flash tank, which goes to the low-temperature multi-effect distillation seawater desalination device, exchanges heat with the entering seawater and then enters a condensation water tank arranged below the low-temperature multi-effect distillation seawater desalination device.
Further, the condensed water in the condensed water tank is respectively conveyed to the flash tank and the intermediate heat exchanger through a water return pump, and is used for supplementing the lost circulating water amount caused by flash evaporation and maintaining the circulating water amount of the intermediate heat exchanger.
Further, the product water desalted by the low-temperature multi-effect distillation seawater desalting device is respectively conveyed to a fresh water tank and a condensation water tank and used for providing domestic water and supplementing normal loss of circulating water of the condensation water tank.
The invention has the beneficial technical effects that:
(1) according to the invention, the intermediate heat exchanger and the flash tank are arranged between the steam system and the low-temperature multi-effect distillation seawater desalination device, so that the steam system and the low-temperature multi-effect distillation seawater desalination device can be isolated, and working steam is prevented from directly entering the low-temperature multi-effect distillation seawater desalination device and bringing radioactive pollution sources;
(2) according to the invention, the booster pump is arranged between the low-temperature multi-effect distilled seawater desalination device and the intermediate heat exchanger, so that the side pressure of the low-temperature multi-effect distilled seawater desalination device is increased, the pressure of water entering the intermediate heat exchanger is increased to be higher than that of a steam system, and the condition that water leaked by the intermediate heat exchanger does not flow into the low-temperature multi-effect distilled seawater desalination device is ensured.
Drawings
FIG. 1 is a schematic diagram of the system for desalinating seawater into product water according to the present invention.
In the figure:
1-low-temperature multi-effect distillation seawater desalination device 2-steam system 3-intermediate heat exchanger
4-flash tank 5-booster pump 6-condensation water tank 7-water return pump
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
As shown in fig. 1, the system for desalinating seawater product water provided by the present invention comprises a low-temperature multi-effect distillation seawater desalination device 1, wherein the low-temperature multi-effect distillation seawater desalination device 1 provides working steam through a nuclear energy steam system 2. In order to ensure that working steam entering the low-temperature multi-effect distillation seawater desalination device 1 does not contain radioactive pollution sources, an intermediate heat exchanger 3 is additionally arranged between a steam system 2 and the low-temperature multi-effect distillation seawater desalination device 1 to isolate the steam system 2 from the low-temperature multi-effect distillation seawater desalination device 1. However, the leakage cannot be completely avoided by the intermediate heat exchanger 3, and the pressure at the side of the low-temperature multi-effect distillation seawater desalination device 1 in the intermediate heat exchanger 3 is necessarily lower than the pressure at the side of the steam system 2 due to heat transfer loss, so that the leakage of radioactive pollution sources possibly existing in the steam system into the working steam of the low-temperature multi-effect distillation seawater desalination device 1 inevitably occurs in the intermediate heat exchanger 3. Thus, it is necessary to ensure that the pressure on the side of the low-temperature multi-effect distillation seawater desalination device is higher than that on the side of the steam system on the heat exchange surface between the steam system 2 and the low-temperature multi-effect distillation seawater desalination device.
Based on the above, on the heat exchange surface between the steam system 2 and the low-temperature multi-effect distillation seawater desalination device 1, the booster pump 5 is used on the side of the low-temperature multi-effect distillation seawater desalination device to boost the pressure of water entering the intermediate heat exchanger 3 to be higher than the pressure of the steam system 2, and even if the intermediate heat exchanger 3 leaks, the water only leaks from the side of the low-temperature multi-effect distillation seawater desalination device 1 to the side of the steam system 2.
The intermediate heat exchanger 3 is a steam-water heat exchanger, and after the gas in the steam system 2 releases heat in the intermediate heat exchanger, the condensed water returns to a steam turbine condenser of the steam system by back pressure; the pressure water at the side of the low-temperature multi-effect distillation seawater desalination device 1 leaves the intermediate heat exchanger 3 with heat. However, the low-temperature multi-effect distillation seawater desalination device needs working steam which is not water, and an intermediate heat exchanger 3 is also needed to convert water into the working steam of the low-temperature multi-effect distillation seawater desalination device.
Based on the method, a flash tank 4 is additionally arranged between the intermediate heat exchanger 3 and the low-temperature multi-effect distillation seawater desalination device 1 to obtain working steam used by the low-temperature multi-effect distillation seawater desalination device. Circulating water is flashed in the flash tank to generate working steam of the low-temperature multi-effect distilled seawater desalination device 1, and circulating water without flashing leaves the flash tank 4 and enters the booster pump 5 to maintain the operation of the intermediate loop. After the condensed water of the working steam going to the low-temperature multi-effect distillation seawater desalination device 1 enters the condensed water tank 6, a part of the condensed water returns to the intermediate heat exchanger 3 through the water return pump 7 so as to keep the circulating water entering the intermediate heat exchanger 3 from being less and less, and the other part of the condensed water enters the flash tank 4 to supplement the circulating water lost by flash evaporation.
In addition, valves are arranged between the intermediate heat exchanger 3 and the flash tank 4 and between the flash tank 4 and the low-temperature multi-effect distilled seawater desalination device 1 for regulating the flow of gas or liquid.
The seawater enters the low-temperature multi-effect distillation seawater desalination device 1, heat exchange is carried out on working steam provided by the flash tank 4, the generated steam is condensed into desalinated product water, the desalinated product water is discharged from a desalinated product water pipeline, and strong brine is discharged from a strong brine pipeline. The intermediate heat exchanger 3 and the flash tank 4 can provide working steam for the low-temperature multi-effect distillation seawater desalination device with the water production amount of 1500 t/d. The intermediate heat exchanger can be a horizontal shell-and-tube heat exchanger with the diameter of 1.82m and the length of 4.85 m; the flash tank can be a vertical tank body with the diameter of 2.7m and the height of 7.02 m; flow 1290m of booster pump 5 parameter can be selected3H, head 15 m. It should be noted that the specific values mentioned above are not intended to limit the present invention, and the size of the parameters can be adjusted according to actual situations.
The system for desalinating seawater to produce water according to the present invention is not limited to the above-mentioned embodiments, and those skilled in the art can derive other embodiments according to the technical solution of the present invention, which also belongs to the technical innovation scope of the present invention.
Claims (5)
1. The system for desalinating the seawater product water comprises a low-temperature multi-effect distillation seawater desalination device (1), wherein the low-temperature multi-effect distillation seawater desalination device (1) provides working steam through a nuclear energy steam system (2), and is characterized in that: an intermediate heat exchanger (3) and a flash tank (4) are arranged between the low-temperature multi-effect distillation seawater desalination device (1) and the steam system (2), and the intermediate heat exchanger (3) is used for converting gas pumped out from the steam system (2) into liquid; the flash tank (4) is used for converting liquid in the intermediate heat exchanger (3) into working steam of the multi-effect distillation seawater desalination device (1); a booster pump (5) capable of improving the pressure of the medium of the intermediate loop entering the intermediate heat exchanger (3) is arranged in front of the intermediate heat exchanger (3), so that the side pressure of the low-temperature multi-effect distillation seawater desalination device (1) in the intermediate heat exchanger (3) is higher than that of the nuclear energy steam system.
2. The system for desalinating seawater into product water according to claim 1, wherein: the gas flashed in the flash tank (4) enters the low-temperature multi-effect distillation seawater desalination device (1) through a pipeline to provide working steam for seawater desalination; the liquid that does not flash, leaves the flash tank (4) and enters the booster pump (5), maintaining the operation of the intermediate circuit.
3. A system for desalinating seawater into product water according to claim 2, wherein: the steam in the flash tank (4) which goes to the low-temperature multi-effect distillation seawater desalination device (1) exchanges heat with the entering seawater and then enters a condensation water tank (6) arranged below the low-temperature multi-effect distillation seawater desalination device (1).
4. A system for desalinating seawater into product water according to claim 3, wherein: and the condensed water in the condensed water tank (6) is respectively conveyed to the flash tank (4) and the intermediate heat exchanger (3) through a water return pump (7) and is used for supplementing the circulating water lost by flash evaporation and maintaining the circulating water quantity of the intermediate heat exchanger (3).
5. The system for desalinating seawater into product water according to claim 4, wherein: the low-temperature multi-effect distillation seawater desalination device (1) is used for respectively delivering the desalinated water to a fresh water tank and a condensation water tank (6) and supplying residential water and supplementing normal loss of circulating water of the condensation water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710280842.0A CN107098421B (en) | 2017-04-26 | 2017-04-26 | System for desalinating product water with sea water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710280842.0A CN107098421B (en) | 2017-04-26 | 2017-04-26 | System for desalinating product water with sea water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107098421A CN107098421A (en) | 2017-08-29 |
| CN107098421B true CN107098421B (en) | 2021-12-03 |
Family
ID=59657742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710280842.0A Active CN107098421B (en) | 2017-04-26 | 2017-04-26 | System for desalinating product water with sea water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107098421B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019050415A1 (en) * | 2017-09-08 | 2019-03-14 | CFD Design and Engineering Limited | Energy recovery system and method |
| CN112551623B (en) * | 2020-11-26 | 2022-10-04 | 中国核电工程有限公司 | Nuclear energy small-sized reactor seawater desalination system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6128490A (en) * | 1984-07-20 | 1986-02-08 | Toshiba Corp | Seawater desalting apparatus for atomic power plant |
| CN101049999A (en) * | 2007-05-18 | 2007-10-10 | 中核能源科技有限公司 | Coupling devices of using nuclear energy for sea water desalination, and method |
| WO2011148422A1 (en) * | 2010-05-27 | 2011-12-01 | 日立Ｇｅニュークリア・エナジー株式会社 | Power generation/seawater desalination complex plant |
| CN102774917A (en) * | 2012-08-14 | 2012-11-14 | 众和海水淡化工程有限公司 | Petrifaction waste heat utilization based low-temperature multiple-effect sea water distillation desalinization system |
| CN103613153A (en) * | 2013-12-06 | 2014-03-05 | 上海电站辅机厂有限公司 | Nuclear power and low temperature multi-effect sea water desalination coupling cogeneration system |
| CN105895179A (en) * | 2016-04-13 | 2016-08-24 | 中国核电工程有限公司 | Method of using nuclear power plant cooling tower waste heat to heat sea light raw water and reduce warm water discharge |
-
2017
- 2017-04-26 CN CN201710280842.0A patent/CN107098421B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6128490A (en) * | 1984-07-20 | 1986-02-08 | Toshiba Corp | Seawater desalting apparatus for atomic power plant |
| CN101049999A (en) * | 2007-05-18 | 2007-10-10 | 中核能源科技有限公司 | Coupling devices of using nuclear energy for sea water desalination, and method |
| WO2011148422A1 (en) * | 2010-05-27 | 2011-12-01 | 日立Ｇｅニュークリア・エナジー株式会社 | Power generation/seawater desalination complex plant |
| CN102774917A (en) * | 2012-08-14 | 2012-11-14 | 众和海水淡化工程有限公司 | Petrifaction waste heat utilization based low-temperature multiple-effect sea water distillation desalinization system |
| CN103613153A (en) * | 2013-12-06 | 2014-03-05 | 上海电站辅机厂有限公司 | Nuclear power and low temperature multi-effect sea water desalination coupling cogeneration system |
| CN105895179A (en) * | 2016-04-13 | 2016-08-24 | 中国核电工程有限公司 | Method of using nuclear power plant cooling tower waste heat to heat sea light raw water and reduce warm water discharge |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107098421A (en) | 2017-08-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8246787B2 (en) | Solar desalinization plant | |
| US8246786B2 (en) | Solar desalinization plant | |
| EP2784028A1 (en) | Integrative system of concentrating solar power plant and desalination plant | |
| KR101695881B1 (en) | Electrical Power Generation And Seawater Desalination System Using Solar Energy For Off-shore Facilities | |
| CN104310687B (en) | Efficient MVR integrated seawater desalination device and seawater desalination method | |
| KR101338187B1 (en) | Sea to fresh water and binary cycle generation system using solar energy | |
| CN101846309B (en) | Boiler room exhaust steam recovery unit | |
| CN107098421B (en) | System for desalinating product water with sea water | |
| CN204661346U (en) | Solar cogeneration seawater desalination system | |
| CN102344179A (en) | Solar absorption type sea water desalination device with regenerative cycle | |
| CN210267441U (en) | Recycling device for waste heat of periodic blowdown and continuous blowdown of power plant boiler | |
| CN104310515A (en) | Mechanical vapor recompression seawater desalination method | |
| CN110726133A (en) | Method and device for reducing dissolved oxygen in water supply of CCPP (combined cycle process control) waste heat boiler | |
| CN110726132B (en) | Method and system for supplying water to steam generator of nuclear power station under low-power working condition | |
| CN205367779U (en) | Nuclear energy sea water desalination | |
| CN102910697A (en) | Marine seawater desalinating unit | |
| CA3068559C (en) | Steam-generating unit of dual circuit reactor with purge and drain system | |
| CN202912730U (en) | Marine sea water desalinization device | |
| CN205035104U (en) | Nuclear power station sea water desalination | |
| CN101955277A (en) | Method for treating water in process of thermal power generation | |
| CN103145207A (en) | Sea water desalting device for twin-stage recovery of flue gas waste heat of marine steam turbine | |
| CN207435085U (en) | Minimize positive pressure distillation seawater desalination system | |
| CN205313129U (en) | Medium temperature solar seawater desalts system | |
| CN205038970U (en) | Nuclear power station seawater desalination and residual heat removal system | |
| CN208980492U (en) | Boiler feedwater processing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |