CN114318387A - Electrolytic water hydrogen production coupling sewage treatment system - Google Patents
Electrolytic water hydrogen production coupling sewage treatment system Download PDFInfo
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- CN114318387A CN114318387A CN202111397048.7A CN202111397048A CN114318387A CN 114318387 A CN114318387 A CN 114318387A CN 202111397048 A CN202111397048 A CN 202111397048A CN 114318387 A CN114318387 A CN 114318387A
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Abstract
The application provides a sewage treatment system for hydrogen production by electrolyzing water, which comprises a hydrogen production mechanism, an ozone sewage treatment mechanism and a membrane distillation mechanism, the electrolytic hydrogen production mechanism is used for introducing oxygen into the ozone sewage treatment mechanism through a first pipeline, the ozone sewage treatment mechanism is used for generating ozone to treat sewage, raw water produced by the ozone sewage treatment mechanism is introduced into the membrane distillation mechanism through a second pipeline, the electrolytic hydrogen production mechanism is coupled with the ozone sewage treatment mechanism, and the oxygen generated by the electrolytic hydrogen production mechanism is used as the raw material to produce ozone, the generated ozone is used for sewage treatment, and the regenerated water obtained by treatment is subjected to membrane distillation by utilizing the waste heat generated in the processes of hydrogen production by electrolyzed water and ozone generation to obtain pure water serving as raw material water for hydrogen production by electrolyzed water, so that the resource utilization efficiency and the energy conversion efficiency of the hydrogen production system by electrolyzed water can be effectively improved.
Description
Technical Field
The application relates to the technical field of electrolytic hydrogen production, in particular to a sewage treatment system for hydrogen production by electrolytic water.
Background
The hydrogen is used as a green and efficient novel energy source, and plays an important role in the process of realizing carbon emission reduction. The hydrogen production by water electrolysis is an important way for realizing energy transformation as an important way for producing green hydrogen. However, compared with the traditional hydrogen production by fossil fuel, the hydrogen production by water electrolysis has the disadvantage of relatively high cost. In the process of producing hydrogen by electrolyzing water, oxygen is generally directly discharged as a byproduct, thereby causing waste of resources.
Disclosure of Invention
The present application is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the purpose of the application is to provide a water electrolysis hydrogen production coupling sewage treatment system, the water electrolysis hydrogen production mechanism and the ozone sewage treatment mechanism are coupled and connected, oxygen generated by the water electrolysis hydrogen production mechanism is used as a raw material to produce ozone, the produced ozone is used for sewage treatment, and the treated regenerated water is subjected to membrane distillation by using waste heat generated in the water electrolysis hydrogen production and ozone generation processes to obtain pure water which is used as raw material water for water electrolysis hydrogen production, so that the resource utilization efficiency and the energy conversion efficiency of the water electrolysis hydrogen production system can be effectively improved.
For reaching above-mentioned purpose, the application provides an electrolysis hydrogen manufacturing coupling sewage treatment system, including electrolysis hydrogen manufacturing mechanism, ozone sewage treatment mechanism and membrane distillation mechanism, electrolysis hydrogen manufacturing mechanism through first pipeline to ozone sewage treatment mechanism lets in oxygen, ozone sewage treatment mechanism is used for growing ozone in order to handle sewage, the raw water of ozone sewage treatment mechanism output lets in through the second pipeline membrane distillation mechanism, the pure water of membrane distillation mechanism output lets in through the third pipeline electrolysis hydrogen manufacturing mechanism carries out the moisturizing.
Further, ozone sewage treatment mechanism includes ozone generator, ozone contact tower and the reclaimed water storage device who connects gradually through the pipeline, ozone contact tower lets in sewage, ozone generator lets in the ozone that grows in the ozone contact tower, sewage and ozone carry out oxidation reaction in the ozone contact tower, the reclaimed water storage device is used for the storage the raw water of ozone contact tower output.
Further, the membrane distillation mechanism comprises a raw water heat exchanger, a raw water auxiliary heater, a membrane distillation assembly and a water production heat exchanger which are sequentially connected through pipelines, wherein the raw water heat exchanger is connected with the regenerated water storage device through a second pipeline, and the water production heat exchanger is connected with the electrolytic hydrogen production mechanism through a third pipeline.
Further, the membrane distillation assembly is also connected with the raw water heat exchanger through a first return pipeline.
Furthermore, the water electrolysis hydrogen production mechanism comprises a water supplementing mechanism, an electrolytic tank, a gas-liquid separator and a gas cooler which are sequentially connected through pipelines, wherein the inlet end of the water supplementing mechanism is connected with the water production heat exchanger through a third pipeline, the water electrolysis hydrogen production mechanism also comprises an electrolyte heat exchanger, and the gas-liquid separator, the electrolyte heat exchanger and the electrolytic tank are connected end to end through pipelines so as to recycle the electrolyte.
Furthermore, the water electrolysis hydrogen production mechanism also comprises a water mist drop catcher, the water mist drop catcher is connected with the gas cooler through a pipeline, and the water mist drop catcher is connected with the ozone generator through the first pipeline to supply oxygen to the ozone generator.
Further, the hydrogen production mechanism by electrolysis also comprises a hydrogen storage device, wherein the hydrogen storage device is connected with the water mist drop catcher through a pipeline so as to store the hydrogen flowing out of the water mist drop catcher.
Further, the circulating cooling device comprises a circulating cooling mechanism, wherein the circulating cooling mechanism is sequentially connected with the gas cooler, the electrolyte heat exchanger and the raw water heat exchanger end to end through pipelines to form a first circulating loop.
Furthermore, the circulating cooling mechanism is sequentially connected with the ozone generator and the raw water heat exchanger end to end through pipelines to form a second circulating loop.
Further, the circulating cooling mechanism is connected with the water-producing heat exchanger in a bidirectional mode through a pipeline to form a third circulating loop.
Further, the ozone generator is connected with the circulating cooling mechanism through a fourth pipeline so as to introduce ozone into the circulating cooling mechanism.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a sewage treatment system coupled with hydrogen production by electrolyzing water according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. On the contrary, the embodiments of the application include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
Fig. 1 is a schematic structural diagram of a sewage treatment system coupled with hydrogen production by electrolyzing water according to an embodiment of the present application.
Referring to fig. 1, a hydrogen production by electrolysis water coupling sewage treatment system, includes hydrogen production by electrolysis mechanism, ozone sewage treatment mechanism and membrane distillation mechanism, hydrogen production by electrolysis mechanism through first pipeline 1 to ozone sewage treatment mechanism lets in oxygen, ozone sewage treatment mechanism is used for growing ozone in order to handle sewage, the raw water of ozone sewage treatment mechanism output lets in through second pipeline 2 membrane distillation mechanism, the pure water of membrane distillation mechanism output lets in through third pipeline 3 hydrogen production by electrolysis mechanism carries out the moisturizing.
In this embodiment, electrolysis hydrogen manufacturing mechanism, ozone sewage treatment mechanism and membrane distillation mechanism connect gradually, electrolysis hydrogen manufacturing mechanism and ozone sewage treatment mechanism coupling realize producing ozone to the utilization of electrolysis hydrogen production oxygen, ozone carries out the distillation purification to membrane distillation subassembly in letting in the reclaimed water that produces behind the sewage treatment and obtains the pure water, the pure water of membrane distillation subassembly output lets in electrolysis hydrogen manufacturing mechanism and mends water, during this period, the distilled heat energy of membrane distillation subassembly can obtain through the heat transfer with electrolysis hydrogen manufacturing mechanism, thereby the holistic resource utilization efficiency of system and energy conversion efficiency have been improved.
Ozone sewage treatment mechanism includes ozone generator 4, ozone contact tower 5 and reclaimed water storage device 6 that connect gradually through the pipeline, ozone contact tower 5 lets in sewage, and the sewage that ozone contact tower 5 lets in can be the play water of upper reaches sewage plant sedimentation tank. Ozone generator 4 lets in ozone that grows in the ozone contact tower 5, sewage and ozone carry out oxidation reaction in the ozone contact tower, regeneration water storage device 6 is used for the storage the raw water of ozone contact tower output. In this embodiment, the ozone generator is used to supply high-concentration excess ozone to the ozone contact tower, and the organic pollutants in the sewage are degraded in the ozone contact tower by the synergistic effect of the excess ozone and the solid-phase catalyst. Sewage obtains the recycled water after degradation, flows through the recycled water storage device through the pipeline and carries out the transfer storage, in this embodiment, recycled water storage device can be tank structure, realizes the storage to the recycled water. Of course, in other embodiments, other storage structures may be used, such as storage pools, and the like, which is not limited in this application.
The membrane distillation mechanism comprises a raw water heat exchanger 7, a raw water auxiliary heater 8, a membrane distillation assembly 9 and a produced water heat exchanger 10 which are sequentially connected through pipelines, wherein the raw water heat exchanger 7 is connected with the regenerated water storage device 6 through a second pipeline 2, and the produced water heat exchanger 10 is connected with the electrolytic hydrogen production mechanism through a third pipeline 3. Specifically, the raw water is heated by the raw water heat exchanger and the raw water auxiliary heater and then enters the membrane distillation assembly 9, the raw water enters the water production side in the form of water vapor under the action of pressure difference at two sides of the membrane distillation assembly 9, and pure water obtained after condensation at the water production side of the membrane distillation assembly 9 enters the water supplementing mechanism of the electrolytic cell to supplement water consumed in the electrolytic process of the electrolytic cell. The raw water heat exchanger primarily heats the raw water by utilizing waste heat of the electrolytic hydrogen production mechanism, so that energy consumption is saved for a subsequent distillation process, the raw water auxiliary heater can be an electric heater, secondary heating of the raw water is realized through an external circuit so as to meet the temperature requirement of distillation, and the reliable operation of the membrane distillation assembly is ensured.
The membrane distillation assembly 9 is also connected with the raw water heat exchanger 7 through a first return line 11. Waste water generated by the distillation assembly can flow back to the raw water heat exchanger, so that secondary utilization is realized, and water resources are fully utilized.
The electrolyzed water hydrogen production mechanism comprises a water supplementing mechanism 12, an electrolytic tank 13, a gas-liquid separator 14 and a gas cooler 15 which are sequentially connected through pipelines, wherein the inlet end of the water supplementing mechanism 12 is connected with the water production heat exchanger 10 through a third pipeline 3, the electrolyzed water hydrogen production mechanism further comprises an electrolyte heat exchanger 16, and the gas-liquid separator 14, the electrolyte heat exchanger 16 and the electrolytic tank 13 are connected end to end through pipelines so as to recycle the electrolyte. In the process of producing hydrogen by electrolyzing water, circulating water outlets of the gas cooler 15, the electrolyte heat exchanger 16 and the ozone generator 4 are connected with a circulating water inlet of the raw water heat exchanger 7; circulating water outlets of the raw water heat exchanger 7 and the water production heat exchanger 10 are connected with a circulating cooling mechanism; the gas cooler 15 and the circulating water inlet of the ozone generator 4 are connected with a circulating cooling mechanism. In this embodiment, the water replenishing mechanism 12 may be a set of device that the water replenishing tank, the water replenishing pump, and the like constitute and replenish the electrolytic cell to consume raw water, and the pure water produced by the water producing heat exchanger 10 flows through the water replenishing tank to be stored, and the water replenishing is performed according to the consumption condition of the electrolyte of the electrolytic cell, so as to realize the stable operation of the electrolytic hydrogen production mechanism. The electrolysis heat exchanger simultaneously flows into the circulating water of the circulating cooling mechanism and the electrolyte separated by the gas-liquid separator, and realizes the heating of the circulating water and the cooling of the electrolyte through heat exchange, thereby realizing the full utilization of heat energy.
The water electrolysis hydrogen production mechanism further comprises a water mist drop catcher 17, the water mist drop catcher 17 is connected with the gas cooler 15 through a pipeline, and the water mist drop catcher 17 is connected with the ozone generator 4 through the first pipeline 1 to supply oxygen to the ozone generator 4. The water mist drop catcher further filters liquid in gas produced by the electrolytic cell to obtain dry gas which is convenient to use, oxygen is introduced into the ozone generator to produce ozone, and hydrogen is introduced into the hydrogen storage device to be stored.
The electrolytic hydrogen production mechanism further comprises a hydrogen storage device 18, and the hydrogen storage device 18 is connected with the water mist drop catcher 17 through a pipeline so as to store hydrogen flowing out of the water mist drop catcher 17. In this embodiment, hydrogen storage device can be for storing up hydrogen jar, convenient transportation utilization, and electrolysis water hydrogen manufacturing mechanism can utilize renewable energy source electricity generation electrolysis water hydrogen manufacturing, and the electrolysis produces hydrogen and can supply the low reaches in market to utilize as the product.
The sewage treatment system for hydrogen production coupling by electrolyzing water further comprises a circulating cooling mechanism 19, wherein the circulating cooling mechanism 19 is sequentially connected with the gas cooler 15, the electrolyte heat exchanger 16 and the raw water heat exchanger 7 end to end through pipelines to form a first circulating loop. The circulating cooling mechanism 19 can be a circulating cooling tower or a circulating cooler and is used as a transfer node of circulating water, and the circulating water realizes heat exchange between the waste heat of the electrolytic hydrogen production mechanism and the raw water in the raw water heat exchanger through the flowing of the first circulating loop, so that the waste heat of the electrolytic hydrogen production mechanism is utilized.
The circulating cooling mechanism 19 is sequentially connected with the ozone generator 4 and the raw water heat exchanger 7 end to end through pipelines to form a second circulating loop. The waste heat generated in the ozone generation process can be used as a heat source of the membrane distillation assembly through the second circulation loop, and the regenerated water is subjected to membrane distillation and then is used as water supplement of the electrolyzed water hydrogen production mechanism.
The circulating cooling mechanism 19 is connected with the water-producing heat exchanger 10 in a bidirectional way through a pipeline to form a third circulating loop. The cooling of the pure water is achieved by a third circulation loop.
Cooling water from the circulating cooling mechanism 19 is divided into three paths, circulating cooling water of the first circulating loop sequentially enters the gas cooler 15 and the electrolyte heat exchanger 16, gas and electrolyte generated by electrolysis are cooled through the heat exchange effect, meanwhile, the temperature of the circulating water is increased, and the heated circulating water enters the raw water heat exchanger 7 to increase the temperature of raw water; circulating water of the second circulating loop enters the ozone generator 4, the internal temperature of the ozone generator 4 is kept stable through the heat exchange effect, and the circulating cooling water enters the raw water heat exchanger 7 after being heated so as to raise the temperature of raw water; the circulating water of the third circulation loop enters the water production heat exchanger 10 to reduce the temperature of the produced water. The circulating cooling mechanism 19 is respectively connected with the circulating water inlets of the gas cooler 15, the ozone generator 4 and the water-producing heat exchanger 10; a circulating water outlet of the gas cooler 15 is connected with a circulating water inlet of the electrolyte heat exchanger 16, and a circulating water outlet of the electrolyte heat exchanger 16 is connected with a circulating water inlet of the raw water heat exchanger 7; a circulating water outlet of the ozone generator 4 is connected with a circulating water inlet of the raw water heat exchanger 7; and circulating water outlets of the raw water heat exchanger and the water production heat exchanger are respectively connected with the circulating cooling mechanism.
The ozone generator 4 is connected to the circulating cooling unit 19 via a fourth line 20 for supplying ozone to the circulating cooling unit. The ozone part generated by the ozone generator is introduced into the circulating cooling mechanism to be used as a disinfectant.
The ozone generator utilizes oxygen generated by electrolyzing water as a raw material to produce ozone, and oxygen serving as a byproduct in the electrolysis process is consumed; a part of generated ozone can be used as a disinfectant of a circulating cooling mechanism, so that the cost caused by a purchased disinfectant is reduced, the rest of generated ozone is used for secondary effluent advanced treatment of a sewage treatment plant, meanwhile, waste heat generated in the electrolytic hydrogen production and ozone generation process is used as a heat source of a membrane distillation mechanism, and regenerated water is used as water supplement of an electrolytic water hydrogen production system after membrane distillation, so that the energy consumption of pure water preparation in the electrolytic water hydrogen production process can be effectively reduced, and the energy conversion efficiency of the whole system is improved. Meanwhile, the recycling of the secondary effluent of the sewage treatment plant has important significance for recycling water resources under the condition of water resource shortage in China at present.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (11)
1. The utility model provides an electrolysis water hydrogen manufacturing coupling sewage treatment system, its characterized in that, constructs including electrolysis hydrogen manufacturing mechanism, ozone sewage treatment mechanism and membrane distillation mechanism, electrolysis hydrogen manufacturing mechanism through first pipeline to ozone sewage treatment mechanism lets in oxygen, ozone sewage treatment mechanism is used for growing ozone in order to handle sewage, the raw water of ozone sewage treatment mechanism output lets in through the second pipeline membrane distillation mechanism, the pure water of membrane distillation mechanism output lets in through the third pipeline electrolysis hydrogen manufacturing mechanism carries out the moisturizing.
2. The system for treating sewage through hydrogen production by electrolyzing water as claimed in claim 1, wherein the ozone sewage treatment mechanism comprises an ozone generator, an ozone contact tower and a regenerated water storage device which are connected in sequence through a pipeline, the ozone contact tower is used for introducing sewage, the ozone generator is used for introducing ozone generated in the ozone contact tower, the sewage and the ozone are subjected to oxidation reaction in the ozone contact tower, and the regenerated water storage device is used for storing raw water produced by the ozone contact tower.
3. The coupled sewage treatment system for hydrogen production through electrolysis of water as claimed in claim 2, wherein the membrane distillation mechanism comprises a raw water heat exchanger, a raw water auxiliary heater, a membrane distillation assembly and a produced water heat exchanger which are connected in sequence through pipelines, the raw water heat exchanger is connected to the regenerated water storage device through the second pipeline, and the produced water heat exchanger is connected to the hydrogen production through a third pipeline.
4. The coupled sewage treatment system for hydrogen production through electrolysis of water as claimed in claim 3, wherein the membrane distillation assembly is further connected with the raw water heat exchanger through a first return line.
5. The coupling sewage treatment system for hydrogen production from electrolyzed water as defined in claim 3, wherein the hydrogen production mechanism from electrolyzed water comprises a water supplementing mechanism, an electrolytic tank, a gas-liquid separator and a gas cooler which are sequentially connected through pipelines, wherein the inlet end of the water supplementing mechanism is connected with the water production heat exchanger through a third pipeline, and the coupling sewage treatment system further comprises an electrolyte heat exchanger, and the gas-liquid separator, the electrolyte heat exchanger and the electrolytic tank are connected end to end through pipelines for recycling the electrolyte.
6. The coupled sewage treatment system for hydrogen production from electrolyzed water as defined in claim 5, wherein the hydrogen production mechanism from electrolyzed water further comprises a water mist drip catcher connected with the gas cooler through a pipeline, the water mist drip catcher being connected with the ozone generator through the first pipeline to supply oxygen to the ozone generator.
7. The coupled sewage treatment system for hydrogen production through water electrolysis according to claim 6, wherein the hydrogen production mechanism further comprises a hydrogen storage device connected with the water mist drop catcher through a pipeline to store the hydrogen flowing out of the water mist drop catcher.
8. The coupled sewage treatment system for hydrogen production through electrolysis of water as claimed in claim 5, further comprising a circulating cooling mechanism, wherein the circulating cooling mechanism is connected with the gas cooler, the electrolyte heat exchanger and the raw water heat exchanger in sequence through pipelines to form a first circulating loop.
9. The coupled sewage treatment system for hydrogen production through electrolysis of water as claimed in claim 3, wherein the circulating cooling mechanism is connected with the ozone generator and the raw water heat exchanger end to end in sequence through pipelines to form a second circulating loop.
10. The coupled sewage treatment system for hydrogen production from electrolyzed water as defined in claim 3, wherein the circulating cooling mechanism is connected with the water-producing heat exchanger in two directions through a pipeline to form a third circulating loop.
11. The coupled sewage treatment system for producing hydrogen by electrolyzing water as claimed in claim 8, wherein the ozone generator is connected to the circulating cooling mechanism through a fourth pipeline to supply ozone to the circulating cooling mechanism.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111397048.7A CN114318387A (en) | 2021-11-23 | 2021-11-23 | Electrolytic water hydrogen production coupling sewage treatment system |
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| CN202111397048.7A CN114318387A (en) | 2021-11-23 | 2021-11-23 | Electrolytic water hydrogen production coupling sewage treatment system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115196808A (en) * | 2022-07-29 | 2022-10-18 | 清华大学 | Sewage treatment device and sewage treatment method |
| CN115261886A (en) * | 2022-07-18 | 2022-11-01 | 中国华能集团清洁能源技术研究院有限公司 | System for producing hydrogen by electrolyzing water and coupling ozone |
-
2021
- 2021-11-23 CN CN202111397048.7A patent/CN114318387A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115261886A (en) * | 2022-07-18 | 2022-11-01 | 中国华能集团清洁能源技术研究院有限公司 | System for producing hydrogen by electrolyzing water and coupling ozone |
| CN115196808A (en) * | 2022-07-29 | 2022-10-18 | 清华大学 | Sewage treatment device and sewage treatment method |
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