CN219409929U - System for preparing fresh water by low-temperature distillation of electrolytic seawater waste heat - Google Patents
System for preparing fresh water by low-temperature distillation of electrolytic seawater waste heat Download PDFInfo
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- CN219409929U CN219409929U CN202223031754.2U CN202223031754U CN219409929U CN 219409929 U CN219409929 U CN 219409929U CN 202223031754 U CN202223031754 U CN 202223031754U CN 219409929 U CN219409929 U CN 219409929U
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- seawater
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- hydrogen production
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- 239000013535 sea water Substances 0.000 title claims abstract description 110
- 239000013505 freshwater Substances 0.000 title claims abstract description 28
- 239000002918 waste heat Substances 0.000 title claims abstract description 20
- 238000005292 vacuum distillation Methods 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 239000001257 hydrogen Substances 0.000 claims abstract description 35
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 35
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 claims abstract description 33
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000004821 distillation Methods 0.000 claims abstract description 25
- 239000001301 oxygen Substances 0.000 claims abstract description 25
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 25
- 239000000498 cooling water Substances 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims abstract description 6
- 238000011033 desalting Methods 0.000 abstract description 2
- 239000003792 electrolyte Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000005868 electrolysis reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002431 hydrogen Chemical group 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The utility model belongs to the technical field of sea water desalting equipment, and particularly relates to a system for preparing fresh water by low-temperature distillation of electrolytic sea water waste heat. The system comprises: the device comprises a seawater filtering device, an electrolytic seawater hydrogen production device, a jet device, a seawater distillation tank and a vapor cooler; the outlet of the seawater filtering device is respectively communicated with the electrolytic seawater hydrogen production device through an electrolytic raw material water pipeline and an electrolytic liquid cooling water pipeline; an oxygen outlet of the electrolytic seawater hydrogen production device is communicated with a power gas inlet of the ejector through an oxygen outlet pipeline; the suction inlet of the ejector is communicated with the sea water distillation tank so as to suck water vapor in the sea water distillation tank; the outlet of the ejector communicates with the steam cooler. The utility model utilizes the waste heat generated by the electrolytic seawater hydrogen production device and the high-pressure oxygen which cannot be fully utilized, and distills the seawater at low temperature to produce fresh water, thereby not only fully utilizing energy, but also producing fresh water, and the device has less equipment and easy operation, thus being an important expansion of the application of the electrolytic seawater hydrogen production device.
Description
Technical Field
The utility model belongs to the technical field of sea water desalting equipment, and particularly relates to a system for preparing fresh water by low-temperature distillation of electrolytic sea water waste heat.
Background
In the system for preparing hydrogen by electrolyzing seawater, the working pressure of electrolyte is about 2MPa, the working temperature is 80-100 ℃, the amount of electrolytic waste heat is large, filtered seawater is required to be used as a cooling medium, and the electrolyte is cooled by a heat exchanger. The temperature of the seawater after heat exchange can reach 40-60 ℃, and the waste heat can not be directly discharged. And oxygen which is one of products in the system for preparing hydrogen by electrolyzing seawater has large yield and high pressure, is often directly discharged, and has obvious energy waste.
The present utility model has been made to solve the above problems.
Disclosure of Invention
Aiming at the current situation that the waste heat and the oxygen pressure energy are not fully utilized in an electrolytic seawater hydrogen production system, the utility model provides a low-temperature distillation fresh water production system by using the waste heat of the electrolytic seawater, the system is characterized in that high-pressure oxygen generated by electrolysis is connected into an ejector, a venturi effect is utilized to generate negative pressure at a suction inlet 22 in the middle of the ejector 2, a seawater distillation tank 3 is vacuumized, the low-temperature heat exchange is carried out, the cooled seawater can be boiled and evaporated under the negative pressure condition, the water vapor is pumped and taken away by the oxygen, the liquid fresh water is generated after the water vapor is cooled in a water vapor cooler 4, and the oxygen is discharged or recycled.
The utility model provides a system for preparing fresh water by low-temperature distillation of electrolytic seawater waste heat, which comprises:
a seawater filtering device 5, an electrolytic seawater hydrogen production device 1, an ejector 2, a seawater distillation tank 3 and a vapor cooler 4;
wherein the outlet of the seawater filtering device 5 is respectively communicated with the electrolytic seawater hydrogen production device 1 through an electrolytic raw material water pipeline 01 and an electrolytic liquid cooling water pipeline 02;
the oxygen outlet of the electrolytic seawater hydrogen production device 1 is communicated with the power gas inlet 21 of the ejector 2 through an oxygen outlet pipeline 03;
the suction inlet 22 of the ejector 2 communicates with the sea still 3 to suck water vapor in the sea still 3;
the outlet 23 of the ejector 2 communicates with the steam cooler 4.
Preferably, the outlet of the seawater filter device 5 is also connected to the water vapour cooler 4 via a cooling water conduit 04 to provide water vapour cooling water.
Preferably, the heat exchange water discharge port of the electrolytic seawater hydrogen plant 1 is communicated to the seawater distillation tank 3 through a heat exchange water discharge pipe 05 to supply heat exchange water as distillation raw water to the seawater distillation tank 3.
Preferably, the outlet of the steam cooler 4 is connected to a fresh water outlet line 06.
Preferably, the heat exchange water discharge outlet of the steam cooler 4 is connected to a final heat exchange water discharge pipe 07.
Preferably, a heat exchanger is arranged in the electrolytic seawater hydrogen production device 1, and the heat exchange water outlet is positioned on the heat exchanger.
Preferably, the bottom outlet of the sea water distillation tank 3 is connected to the concentrated sea water discharge pipe 08.
The working method of the electrolytic seawater waste heat low-temperature distillation fresh water production system comprises the following steps that seawater enters a seawater filtering device 5 to remove suspended matters, organic matters and other impurities, and flows out in three ways, wherein two ways respectively flow into an electrolytic seawater hydrogen production device 1 through an electrolytic raw material water pipeline 01 and an electrolytic liquid cooling water pipeline 02 to serve as electrolytic raw material water and electrolytic liquid cooling water, and the rest of the two ways flow into a vapor cooler 4 through a cooling water pipeline 04 to serve as vapor cooling water;
high-pressure oxygen generated by the electrolytic seawater hydrogen production device 1 flows into the ejector 2 through the oxygen discharge pipeline 03 to generate negative pressure to suck air in the seawater distillation tank 3, and in a negative pressure state, seawater in the seawater distillation tank 3 can be boiled and evaporated, water vapor is taken into the water vapor cooler 4 by the oxygen suction in the ejector 2, and liquid fresh water is generated after cooling.
Preferably, a heat exchanger is arranged in the electrolytic seawater hydrogen production device 1, filtered seawater is used for cooling electrolyte, the temperature of the seawater is raised to 40-60 ℃ after heat exchange, and the seawater flows into the seawater distillation tank 3 to be used as distilled raw material water. And the seawater after concentrating by a certain multiple is discharged periodically.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model utilizes the waste heat generated by the electrolytic seawater hydrogen production device and the high-pressure oxygen which cannot be fully utilized, and distills the seawater at low temperature to prepare fresh water, thereby not only fully utilizing energy, but also being capable of generating the fresh water which is very important in offshore production and life, and the device has few equipment and easy operation, and is an important expansion of the application of the electrolytic seawater hydrogen production device.
Drawings
FIG. 1 is a schematic diagram of a system of the present utility model, wherein arrows in the diagram represent flow directions, solid lines represent flow directions which are liquid, broken lines represent flow directions which are gas, A represents seawater, B represents hydrogen, C represents oxygen, D represents fresh water, E represents heat exchanged seawater, and F represents concentrated seawater.
List of reference numerals:
01. the device comprises an electrolysis raw water pipeline, an electrolyte cooling water pipeline, an oxygen discharge pipeline, a cooling water pipeline, a heat exchange water discharge pipeline, a fresh water discharge pipeline, a final heat exchange water discharge pipeline, a concentrated seawater discharge pipeline, an electrolysis raw water pipeline, an oxygen discharge pipeline, a cooling water pipeline, a heat exchange water discharge pipeline, a fresh water discharge pipeline, a final heat exchange water discharge pipeline, a concentrated seawater discharge pipeline, an electrolysis seawater hydrogen production device, an ejector, a power gas inlet, a suction inlet, a discharge outlet, a seawater distillation tank, a vapor cooler and a seawater filtering device.
Detailed Description
The present utility model will be described in further detail with reference to examples.
It will be appreciated by those skilled in the art that the following examples are illustrative of the present utility model and should not be construed as limiting the scope of the utility model. The specific techniques or conditions are not identified in the examples and are performed according to techniques or conditions described in the literature in this field or according to the product specifications. The materials or equipment used are conventional products available from commercial sources, not identified to the manufacturer.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Further, "connected" as used herein may include wireless connections.
In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more. The orientation or state relationship indicated by the terms "inner", "upper", "lower", etc. are orientation or state relationship based on the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the utility model.
In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "provided" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model is understood by those of ordinary skill in the art according to the specific circumstances.
It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Example 1
A system for producing fresh water by low temperature distillation of waste heat of electrolyzed seawater, the system comprising:
a seawater filtering device 5, an electrolytic seawater hydrogen production device 1, an ejector 2, a seawater distillation tank 3 and a vapor cooler 4;
wherein the outlet of the seawater filtering device 5 is respectively communicated with the electrolytic seawater hydrogen production device 1 through an electrolytic raw material water pipeline 01 and an electrolytic liquid cooling water pipeline 02;
the oxygen outlet of the electrolytic seawater hydrogen production device 1 is communicated with the power gas inlet 21 of the ejector 2 through an oxygen outlet pipeline 03;
the suction inlet 22 of the ejector 2 communicates with the sea still 3 to suck water vapor in the sea still 3;
the outlet 23 of the ejector 2 communicates with the steam cooler 4.
The outlet of the seawater filter device 5 is also connected to the water vapor cooler 4 via a cooling water conduit 04 to provide water vapor cooling water.
The heat exchange water discharge port of the electrolytic seawater hydrogen plant 1 is communicated to the seawater distillation tank 3 through a heat exchange water discharge pipe 05 to supply heat exchange water as distilled raw material water to the seawater distillation tank 3.
The outlet of the steam cooler 4 is connected to a fresh water outlet line 06.
The heat exchange water discharge port of the steam cooler 4 is connected to a final stage heat exchange water discharge pipe 07.
The electrolytic seawater hydrogen production device 1 is internally provided with a heat exchanger, and the heat exchange water outlet is positioned on the heat exchanger.
The bottom outlet of the seawater distillation pot 3 is communicated with a concentrated seawater discharge pipeline 08.
The working method of the electrolytic seawater waste heat low-temperature distillation fresh water production system comprises the following steps that seawater enters a seawater filtering device 5 to remove suspended matters, organic matters and other impurities, and flows out in three ways, wherein two ways respectively flow into an electrolytic seawater hydrogen production device 1 through an electrolytic raw material water pipeline 01 and an electrolytic liquid cooling water pipeline 02 to serve as electrolytic raw material water and electrolytic liquid cooling water, and the rest of the two ways flow into a vapor cooler 4 through a cooling water pipeline 04 to serve as vapor cooling water;
high-pressure oxygen generated by the electrolytic seawater hydrogen production device 1 flows into the ejector 2 through the oxygen discharge pipeline 03 to generate negative pressure to suck air in the seawater distillation tank 3, and in a negative pressure state, the seawater in the seawater distillation tank 3 can be boiled and evaporated, water vapor is carried by the oxygen suction belt in the ejector 2 to enter the water vapor cooler 4, liquid fresh water is generated after cooling, and oxygen is discharged.
The hydrogen produced by the electrolytic seawater hydrogen production device 1 is collected.
The inside of the electrolytic seawater hydrogen production device 1 is provided with a heat exchanger, filtered seawater is used for cooling electrolyte, the temperature of the seawater is raised to 40-60 ℃ after heat exchange, and the seawater flows into a seawater distillation tank 3 to be used as distilled raw material water. And the seawater after concentrating by a certain multiple is discharged periodically.
Claims (6)
1. A system for producing fresh water by low temperature distillation of waste heat of electrolyzed seawater, the system comprising:
a seawater filtering device (5), an electrolytic seawater hydrogen production device (1), an ejector (2), a seawater distillation tank (3) and a vapor cooler (4);
wherein, the outlet of the seawater filtering device (5) is respectively communicated with the electrolytic seawater hydrogen production device (1) through an electrolytic raw material water pipeline (01) and an electrolytic liquid cooling water pipeline (02);
an oxygen outlet of the electrolytic seawater hydrogen production device (1) is communicated with a power gas inlet (21) of the ejector (2) through an oxygen outlet pipeline (03);
the suction inlet (22) of the ejector (2) is communicated with the sea water distillation tank (3);
the outlet opening (23) of the ejector (2) communicates with the steam cooler (4).
2. The electrolytic seawater waste heat cryogenic distillation fresh water making system according to claim 1, characterized in that the outlet of the seawater filter device (5) is also communicated to the water vapor cooler (4) through a cooling water pipe (04) to provide water vapor cooling water.
3. The system for producing fresh water by low-temperature distillation using waste heat of electrolyzed seawater according to claim 1, wherein the heat exchange water discharge outlet of the hydrogen production device (1) for electrolyzed seawater is communicated to the seawater distillation tank (3) through a heat exchange water discharge pipe (05).
4. The system for producing fresh water by cryogenic distillation of electrolyzed seawater waste heat according to claim 1, characterized in that the outlet of the steam cooler (4) is communicated with a fresh water outlet pipe (06).
5. The system for producing fresh water by low-temperature distillation using waste heat of electrolyzed seawater according to claim 1, wherein the heat exchange water outlet of the steam cooler (4) is communicated with a final stage heat exchange water outlet pipeline (07).
6. A system for producing fresh water by low temperature distillation of waste heat of electrolyzed seawater according to claim 3, wherein a heat exchanger is arranged in the hydrogen production device (1) of electrolyzed seawater, and the heat exchange water outlet is positioned on the heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223031754.2U CN219409929U (en) | 2022-11-15 | 2022-11-15 | System for preparing fresh water by low-temperature distillation of electrolytic seawater waste heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223031754.2U CN219409929U (en) | 2022-11-15 | 2022-11-15 | System for preparing fresh water by low-temperature distillation of electrolytic seawater waste heat |
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| Publication Number | Publication Date |
|---|---|
| CN219409929U true CN219409929U (en) | 2023-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223031754.2U Active CN219409929U (en) | 2022-11-15 | 2022-11-15 | System for preparing fresh water by low-temperature distillation of electrolytic seawater waste heat |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117468021A (en) * | 2023-11-09 | 2024-01-30 | 中国科学院大连化学物理研究所 | System and method for producing hydrogen by using alkaline and proton exchange membrane in series-parallel connection with seawater |
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2022
- 2022-11-15 CN CN202223031754.2U patent/CN219409929U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117468021A (en) * | 2023-11-09 | 2024-01-30 | 中国科学院大连化学物理研究所 | System and method for producing hydrogen by using alkaline and proton exchange membrane in series-parallel connection with seawater |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Room A101, Tsinghua University Research Institute, No. 019 Gaoxin South 7th Road, Gaoxin Community, Yuehai Street, Nanshan District, Shenzhen City, Guangdong Province, 518057 Patentee after: Shenzhen Hydrogen Energy Co.,Ltd. Address before: Room A101, Tsinghua University Research Institute, No. 019 Gaoxin South 7th Road, Gaoxin Community, Yuehai Street, Nanshan District, Shenzhen City, Guangdong Province, 518057 Patentee before: Shenzhen haihydrogen Technology Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |