CN215048809U - System for recovering waste heat in seawater desalination process and heating domestic water - Google Patents
System for recovering waste heat in seawater desalination process and heating domestic water Download PDFInfo
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- CN215048809U CN215048809U CN202120975829.9U CN202120975829U CN215048809U CN 215048809 U CN215048809 U CN 215048809U CN 202120975829 U CN202120975829 U CN 202120975829U CN 215048809 U CN215048809 U CN 215048809U
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Abstract
The utility model discloses a system for retrieving waste heat and be used for heating domestic water in sea water desalination process, the utility model discloses an add low temperature heater and high temperature heater, utilize the heat energy heating resident domestic water of the concentrated seawater that low temperature multiple-effect distillation sea water desalination process produced, partially replaced originally with gas or electrical heating domestic water, effectively retrieved the waste heat energy of concentrated seawater in the time of the energy saving, also reduced "thermal pollution" to the ocean. Moreover, the system can be operated intermittently and continuously, so that the system can meet the requirement of residents on domestic warm water (the water temperature is about 15 ℃) and domestic hot water.
Description
Technical Field
The utility model belongs to sea water desalination waste heat utilization field, concretely relates to system for retrieving waste heat and being used for heating domestic water among sea water desalination.
Background
At present, a plurality of seawater desalination processes are available, and the seawater desalination processes reaching commercial scale mainly comprise a reverse osmosis method and a distillation method, namely a membrane method and a thermal method, wherein the thermal method technology comprises two common technologies of low-temperature multi-effect distillation and multi-stage flash evaporation. The low-temperature multi-effect distillation seawater desalination technology adopts low-quality steam with the pressure of 25-35 kPa and the temperature of 65-70 ℃ to heat seawater, and the steam generated in the previous evaporator provides a heat source for the next evaporator and is gradually condensed into fresh water.
A series of horizontal pipe spraying falling film evaporators are connected in series, and power steam enters a first effect evaporator and is condensed into desalinated water after exchanging heat with feed seawater; the seawater is evaporated, the steam enters the second effect evaporator, and almost the same amount of seawater is evaporated at a lower temperature than the first effect and is condensed. This process is repeated until the final effect, producing desalinated water continuously.
The seawater is preheated and degassed in the condenser and then divided into two streams, one stream is discharged back to the sea, and the other stream is the feed liquid. Adding a scale inhibitor into the feed liquid, and respectively introducing the feed liquid into each stage of evaporator. The spraying system distributes the feed liquid on the top discharge pipe, and in the falling film process from top to bottom, a part of seawater absorbs the latent heat of condensed steam in the pipe bundle to be vaporized; the condensate is led out by desalted water, and the steam enters the next effect group. The evaporation and spraying processes are repeated in each evaporator, the seawater is discharged in each evaporator in the form of concentrated seawater, and the concentrated seawater is directly discharged into the sea.
At present, the concentrated seawater temperature can reach 37-42 ℃ under the working condition of summer operation in the thermal power generating unit coupled low-temperature multi-effect distillation seawater desalination process, and the concentrated seawater is directly discharged into the sea, so that not only is all waste heat energy lost, but also the heat pollution of the sea is caused.
Disclosure of Invention
An object of the utility model is to overcome above-mentioned not enough, provide a system that retrieves waste heat and be used for heating domestic water in the sea water desalination technology, utilize the concentrated seawater heating resident domestic water that produces in the low temperature multiple-effect distillation sea water desalination technology, replace gas or electrical heating originally, effectively retrieve the waste heat energy of concentrated seawater, reduce "thermal pollution" to the ocean simultaneously.
In order to achieve the purpose, the utility model discloses a low temperature heater, water storage tank, high temperature heater and peak heater low temperature heater's cold source side import inserts resident domestic water, and low temperature heater connects the water storage tank, and high temperature heater is connected to the water storage tank, and high temperature heater connects the peak heater, peak heater exit linkage user.
The heat source sides of the low-temperature heater and the high-temperature heater are connected with concentrated seawater.
The temperature of warm water at the outlet of the water storage tank is 15 ℃, one part of the warm water enters the user side, and the other part of the warm water enters the high-temperature heater.
The cold source side inlet of the high-temperature heater is connected with warm water at the outlet of the water storage tank, and hot water at the outlet enters the peak heater.
The peak heater heats the liquid at the cold source side through electricity or fuel gas.
And draining the heat source side of the low-temperature heater and the high-temperature heater into the sea.
Compared with the prior art, the utility model discloses an add low temperature heating ware and high temperature heating ware, utilize the heat energy heating resident domestic water of the concentrated seawater that low temperature multiple-effect distillation sea water desalination process produced, partially replaced originally with gas or electrical heating domestic water, effectively retrieved the waste heat energy of concentrated seawater when the energy saving, also reduced "thermal pollution" to the ocean. Moreover, the system can be operated intermittently and continuously, so that the system can meet the requirement of residents on domestic warm water (the water temperature is about 15 ℃) and domestic hot water.
Drawings
FIG. 1 is a system configuration diagram of the present invention;
wherein, 1, low temperature heater, 2, water storage tank, 3, high temperature heater, 4, spike heater.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1, the novel solar water heater comprises a low-temperature heater 1, a water storage tank 2, a high-temperature heater 3 and a peak heater 4, wherein the low-temperature heater 1 is connected with the water storage tank 2, the water storage tank 2 is connected with the high-temperature heater 3, the high-temperature heater 3 is connected with the peak heater 4, and an outlet of the peak heater 4 is connected with a user; concentrated seawater is accessed at the heat source sides of the low-temperature heater 1 and the high-temperature heater 3, domestic water for residents is accessed at the cold source side inlet of the low-temperature heater 1, and warm water at the outlet enters the water storage tank 2; warm water at the outlet of the water storage tank 2 is at about 15 ℃, one part of the warm water enters the user side and is directly used by residents, and the rest part of the warm water enters the high-temperature heater 3; a cold source side inlet of the high-temperature heater 3 is connected with warm water at an outlet of the water storage tank 2, and hot water at the outlet enters the peak heater 4; the heat source side of the peak heater 4 is connected with electricity or gas, and the electricity or gas is further heated and then is supplied to domestic hot water of a user.
The utility model discloses an operating method, its characterized in that, including following step:
introducing concentrated seawater generated in the low-temperature multi-effect distilled seawater desalination process into the heat source sides of a low-temperature heater 1 and a high-temperature heater 3; leading domestic water of residents to the cold source side of the surface type heater 1;
the warm water (about 15 ℃) of the domestic water of residents after passing through the low-temperature heater 1 enters the water storage tank 2, and a part of the warm water is supplied to users; the rest part enters a high-temperature heater;
the warm water is supplied to a user through the hot water after passing through the high-temperature heater 3 and the peak heater 4;
the concentrated seawater is discharged into the sea after heat exchange and temperature reduction.
Claims (6)
1. The utility model provides a system for retrieve waste heat and be used for heating domestic water in sea water desalination, its characterized in that, including low temperature heater (1), water storage tank (2), high temperature heater (3) and peak heater (4) low temperature heater (1) cold source side import access resident domestic water, low temperature heater (1) is connected water storage tank (2), high temperature heater (3) is connected in water storage tank (2), peak heater (4) is connected in high temperature heater (3), peak heater (4) exit linkage user.
2. The system for recovering the waste heat for heating the domestic water in the seawater desalination process as claimed in claim 1, wherein the heat source sides of the low temperature heater (1) and the high temperature heater (3) are connected with the concentrated seawater.
3. The system for recovering the waste heat for heating the domestic water in the seawater desalination process as claimed in claim 1, wherein the temperature of the warm water at the outlet of the water storage tank (2) is 15 ℃, one part of the warm water enters the user side, and the other part of the warm water enters the high temperature heater (3).
4. The system for recovering the waste heat for heating the domestic water in the seawater desalination process as claimed in claim 1, wherein the cold source side inlet of the high temperature heater (3) is connected to the outlet warm water of the water storage tank (2), and the outlet warm water enters the peak heater (4).
5. The system for recovering the waste heat for heating the domestic water in the seawater desalination process as claimed in claim 1, wherein the peak heater (4) heats the liquid at the cold source side by electricity or gas.
6. The system for recovering the waste heat for heating the domestic water in the seawater desalination process as claimed in claim 1, wherein the heat source sides of the low-temperature heater (1) and the high-temperature heater (3) are drained into the sea.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120975829.9U CN215048809U (en) | 2021-05-08 | 2021-05-08 | System for recovering waste heat in seawater desalination process and heating domestic water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120975829.9U CN215048809U (en) | 2021-05-08 | 2021-05-08 | System for recovering waste heat in seawater desalination process and heating domestic water |
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| Publication Number | Publication Date |
|---|---|
| CN215048809U true CN215048809U (en) | 2021-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120975829.9U Active CN215048809U (en) | 2021-05-08 | 2021-05-08 | System for recovering waste heat in seawater desalination process and heating domestic water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113072114A (en) * | 2021-05-08 | 2021-07-06 | 西安热工研究院有限公司 | System and method for recovering strong brine waste heat to heat domestic water |
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2021
- 2021-05-08 CN CN202120975829.9U patent/CN215048809U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113072114A (en) * | 2021-05-08 | 2021-07-06 | 西安热工研究院有限公司 | System and method for recovering strong brine waste heat to heat domestic water |
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