Wastewater purification coupling electrolytic hydrogen production system

Abstract

The utility model discloses a wastewater purification coupling electrolytic hydrogen production system, which comprises a first to-be-electrolyzed water preparation device, the input end of the first to-be-electrolyzed water preparation device is connected with a wastewater taking point, the output end of the first to-be-electrolyzed water preparation device is connected with a first electrolytic hydrogen production device, and the first to-be-electrolyzed water preparation device is used for adjusting wastewater taken by the wastewater taking point into first to-be-electrolyzed water; the first electrolytic hydrogen production device is used for carrying out electrocatalytic oxidation coupling hydrogen production on the first to-be-electrolyzed water and outputting wastewater subjected to electrocatalytic oxidation purification; the input end of the second to-be-electrolyzed water preparation device is connected with the first electrolytic hydrogen production device, the output end of the second to-be-electrolyzed water preparation device is connected with the second electrolytic hydrogen production device, and the second to-be-electrolyzed water preparation device is used for adjusting the electrocatalytic oxidation purified wastewater into second to-be-electrolyzed water; and the second electrolytic hydrogen production device is used for carrying out alkaline water electrolysis hydrogen production, PEM water electrolysis hydrogen production or saline water electrolysis hydrogen production on the second to-be-electrolyzed water.

Description

Technical Field

[0001] The utility model relates to a hydrogen production device for an ecological city energy conversion, wastewater treatment and carbon reduction system, a building-level ecological system integrating energy conversion, wastewater treatment and carbon reduction, and a wastewater purification coupled electrolytic hydrogen production system. Background Technique

[0002] The construction of ecological cities mainly involves two major aspects: the construction of renewable energy systems and environmental governance. For the construction of renewable energy systems, green electricity and hydrogen energy are currently the two main types of renewable energy. Green electricity is mainly the electricity produced through a production process with zero or nearly zero carbon dioxide emissions using solar energy, wind energy, biomass energy, geothermal energy, etc. Hydrogen energy is known as the "ultimate energy in the 21st century", and electrolytic water hydrogen production is one of the main production methods of hydrogen energy currently. For environmental governance, wastewater and flue gas are the main treatment targets.

[0003] Flue gas often contains a large amount of carbon dioxide generated by combustion. Capturing and utilizing the carbon dioxide in flue gas is an important aspect of carbon emission reduction. Carbon capture, utilization and storage (CCUS) technology is the most effective and direct means of carbon emission reduction. In recent years, CCUS technology has made great progress. The technology of synthesizing formaldehyde / methanol from hydrogen produced by electrolytic water hydrogen production and carbon dioxide captured by CCUS technology has matured.

[0004] The treatment methods of wastewater mainly include biological method, electro-chemical reaction (electrolysis) method, membrane treatment method, ion exchange method, and evaporation crystallization method. The biological method removes pollutants by oxidizing, decomposing and adsorbing salts and organic matters in wastewater through the metabolic action of microorganisms. The electrolysis method removes salts in water through electrolysis. The membrane treatment method uses the difference in the selective permeability of each component in wastewater by the membrane to separate, purify and concentrate the target substance. The ion exchange method is a method of removing salts in the original water by the exchange reaction of anions and cations in the saline wastewater with the anions and cations fixed on the ion exchange resin. The evaporation crystallization method is a method of using the evaporation principle to evaporate water and increase the salt concentration of wastewater so that salts can precipitate.

[0005] Currently, the electro-chemical reactors that can be used for the above electrolysis method mainly include electro-catalytic oxidation (EO) reactors and electro-coagulation (EC) reactors. Their basic structures are similar, that is, they both include an electrolysis device and a DC power supply. The anode and cathode of the electrolysis device are respectively connected to the positive and negative poles of the DC power supply. The main difference between the two is the difference in electrode materials.

[0006] Electro-Catalytic Oxidation (EO) is to utilize the oxidation of the anode (usually a titanium-based metal oxide coated electrode), and / or to generate free radicals by the action of an electric field, so as to promote the oxidation and decomposition of pollutants, thereby achieving wastewater treatment. It can be subdivided into direct oxidation method and indirect oxidation method. The direct oxidation method is to directly oxidize the pollutants on the anode surface to achieve the purpose of removing pollution. The indirect oxidation method is to decompose water molecules by an electric field to generate oxidants such as hydroxyl radicals, and the oxidants react with the pollutants in the wastewater to remove pollution.

[0007] Electro-coagulation (EC) is to dissolve metal ions in the anode (usually an aluminum electrode or an iron electrode) into the wastewater, and generate metal hydroxides through hydrolysis reaction. The metal hydroxides act as flocculants to coagulate the suspended substances and colloids in the wastewater, thereby achieving the purpose of removing pollution. At the same time, the hydrogen ions at the cathode are reduced to hydrogen gas after obtaining electrons, and overflow in the form of fine bubbles. Through the air flotation effect, the flocs and oil substances in the wastewater float to the water surface.

[0008] At present, the functions of electro-catalytic oxidation technology and electro-coagulation technology are relatively single, and the recycling of hydrogen gas has not been realized. With the development of the hydrogen source industry, the demand for hydrogen gas is constantly expanding. Summary of the Invention

[0009] The purpose of the present utility model is to provide a hydrogen production device for an ecological city energy conversion, wastewater treatment and carbon reduction system, so as to construct a new ecological city energy conversion, wastewater treatment and carbon reduction system on the basis of combining wastewater treatment with electrolytic water hydrogen production.

[0010] For this reason, the first aspect of the present utility model provides a hydrogen production device for an ecological city energy conversion, wastewater treatment and carbon reduction system, and the ecological city energy conversion, wastewater treatment and carbon reduction system is constructed with:

[0011] A green power production system, the green power production system establishes a green power production operation big data system and a green power production factory covered by the green power production operation big data system;

[0012] A wastewater purification system, the wastewater purification system establishes a wastewater treatment factory, and the wastewater treatment factory is used for purifying wastewater treatment;

[0013] An electrolytic water hydrogen production system, the electrolytic water hydrogen production system establishes an electrolytic water hydrogen production operation big data system and an electrolytic hydrogen production factory covered by the electrolytic water hydrogen production operation big data system;

[0014] A carbon dioxide capture system, in which a big data system for carbon dioxide capture operation is established, and a carbon dioxide capture plant covered by the big data system for carbon dioxide capture operation;

[0015] A carbon-hydrogen synthetic fuel production system, in which a big data system for carbon-hydrogen synthetic fuel operation is established, and a carbon-hydrogen synthetic fuel production plant covered by the big data system for carbon-hydrogen synthetic fuel operation;

[0016] A green power transmission network is established between the green power production system and the electrolytic water hydrogen production system, a hydrogen transmission network is established between the electrolytic water hydrogen production system and the carbon-hydrogen synthetic fuel production system, and a carbon source transmission network is established between the carbon dioxide capture system and the carbon-hydrogen synthetic fuel production system;

[0017] It adopts a waste water purification coupled electrolytic hydrogen production system, which uses the green power provided by the green power transmission network to perform electrocatalytic oxidation on waste water and electrolytic hydrogen production. The waste water purification coupled electrolytic hydrogen production system includes:

[0018] A first electrolytic water preparation device, the input end of which is connected to the water intake point in the corresponding waste water treatment plant and the output end is connected to the first electrolytic hydrogen production device, and is used to adjust the waste water after pre-purification treatment in the waste water treatment plant into the first electrolytic water;

[0019] A first electrolytic hydrogen production device, which is used for electrocatalytic oxidation coupled hydrogen production of the first electrolytic water and outputs the electrocatalytically oxidized and purified waste water;

[0020] A second electrolytic water preparation device, the input end of which is connected to the first electrolytic hydrogen production device and the output end is connected to the second electrolytic hydrogen production device, and is used to adjust the electrocatalytically oxidized and purified waste water into the second electrolytic water;

[0021] A second electrolytic hydrogen production device, which is used for alkaline electrolytic hydrogen production or PEM electrolytic hydrogen production of the second electrolytic water.

[0022] According to an embodiment of the present utility model, the first electrolytic hydrogen production device may include: a first electrocatalytic oxidation-coupled hydrogen production device, which is used for performing first electrocatalytic oxidation-coupled hydrogen production on the first water to be electrolyzed and outputting first electrocatalytic oxidation-purified wastewater. The anodic electrochemical reaction of the first electrocatalytic oxidation-coupled hydrogen production is mainly used to remove organic matter and ammonia nitrogen in water; a second electrocatalytic oxidation-coupled hydrogen production device, which is used for performing second electrocatalytic oxidation-coupled hydrogen production on the first electrocatalytic oxidation-purified wastewater and outputting second electrocatalytic oxidation-purified wastewater. The anodic electrochemical reaction of the second electrocatalytic oxidation-coupled hydrogen production is mainly used for desalination; wherein, the second electrocatalytic oxidation-purified wastewater serves as the electrocatalytic oxidation-purified wastewater output by the first electrolytic hydrogen production device.

[0023] According to an embodiment of the present utility model, the first electrolytic hydrogen production device may include: a first electrocatalytic oxidation-purified wastewater adjustment device, the input end of which is connected to the first electrocatalytic oxidation-coupled hydrogen production device and the output end of which is connected to the second electrocatalytic oxidation-coupled hydrogen production device, and which is used for adjusting the first electrocatalytic oxidation-purified wastewater output by the first electrocatalytic oxidation-coupled hydrogen production device into the first electrocatalytic oxidation-purified wastewater that meets the water inlet requirements of the second electrocatalytic oxidation-coupled hydrogen production device.

[0024] According to an embodiment of the present utility model, the water inlet requirements of the first electrolytic hydrogen production device or the first electrocatalytic oxidation-coupled hydrogen production device are: the pH value is 5-9, the chemical oxygen demand (COD cr ) ≤ 3500 mg / L, the biochemical oxygen demand in five days (BOD 5 ) ≤ 200 mg / L, the ammonia nitrogen ≤ 1000 mg / L, and the suspended solids ≤ 10 mg / L.

[0025] According to an embodiment of the present utility model, the second electrolytic hydrogen production device may include: a plurality of independent second electrolytic hydrogen production modules. The second water to be electrolyzed preparation device includes a water storage device capable of respectively providing second water to be electrolyzed for each of the plurality of second electrolytic hydrogen production modules; when the green electricity generated by the green electricity production system and supplied to the wastewater purification-coupled electrolytic hydrogen production system through the green electricity transmission network is at the peak stage, the first electrolytic hydrogen production device and each of the plurality of second electrolytic hydrogen production modules all operate; when the green electricity generated by the green electricity production system and supplied to the wastewater purification-coupled electrolytic hydrogen production system through the green electricity transmission network is at the trough stage, the first electrolytic hydrogen production device stops operating, and all or part of the plurality of second electrolytic hydrogen production modules operate according to the green electricity supply situation.

[0026] According to an embodiment of the present utility model, the first electrolytic hydrogen production device is a 100 kW-class electrolytic hydrogen production device or an MW-class electrolytic hydrogen production device, and the power of each second electrolytic hydrogen production module among the plurality of second electrolytic hydrogen production modules is one order of magnitude lower than that of the first electrolytic hydrogen production device, and each second electrolytic hydrogen production module respectively adopts a 10 kW-class electrolytic cell or a 100 kW-class electrolytic cell.

[0027] According to an embodiment of the present utility model, the first water to be electrolyzed preparation device and / or the second water to be electrolyzed preparation device respectively form a movable skid-mounted structure; a water treatment module configuration area, a water storage module configuration area, and a water pump delivery module configuration area are provided in the movable skid-mounted structure. All or part of the water treatment modules selected from a variety of different water treatment modules are configured and installed in the water treatment module configuration area. An input-side water storage device and an output-side water storage device that are respectively connected one-to-one with each water treatment module installed in the water treatment module configuration area are configured and installed in the water storage module configuration area. A water pump delivery module corresponding to each water treatment module installed in the water treatment module configuration area is configured and installed in the water pump delivery module configuration area. Each water pump delivery module is used to drive the water in the input-side water storage device connected to the corresponding water treatment module to enter the output-side water storage device connected to the corresponding water treatment module after passing through the corresponding water treatment module.

[0028] According to an embodiment of the present utility model, the second water to be electrolyzed preparation device includes a cascaded reverse osmosis membrane filtration device, a continuous electrodeionization device, and an ion exchange demineralization device using polished resin, which are arranged in sequence from front to back.

[0029] According to an embodiment of the present utility model, the cascaded reverse osmosis membrane filtration device includes a high-pressure reverse osmosis membrane filtration device and a low-pressure reverse osmosis membrane filtration device arranged in sequence from front to back. The clear water outlet of the high-pressure reverse osmosis membrane filtration device is connected to the water inlet of the low-pressure reverse osmosis membrane filtration device. The clear water outlet of the low-pressure reverse osmosis membrane filtration device is connected to the water inlet of the continuous electrodeionization device. The concentrated water outlet of the low-pressure reverse osmosis membrane filtration device is connected to the water inlet of the second water to be electrolyzed preparation device.

[0030] According to an embodiment of the present utility model, the low-pressure reverse osmosis membrane filtration device adopts a spiral wound reverse osmosis membrane filtration device, and the high-pressure reverse osmosis membrane filtration device adopts a disk tube reverse osmosis membrane filtration device.

[0031] For the hydrogen production equipment of the ecological city energy conversion, wastewater treatment and carbon reduction system in the first aspect above, a wastewater purification coupled electrolytic hydrogen production system is adopted. The wastewater purification coupled electrolytic hydrogen production system uses green electricity provided by the green electricity transmission network to perform electrocatalytic oxidation on wastewater and electrolyze water to produce hydrogen. The wastewater purification coupled electrolytic hydrogen production system includes: a first water to be electrolyzed preparation device, a first electrolytic hydrogen production device, a second water to be electrolyzed preparation device, and a second electrolytic hydrogen production device.

[0032] Among them, the first water to be electrolyzed preparation device can adjust the wastewater after pre-purification treatment in the corresponding wastewater treatment plant into the first water to be electrolyzed and then input it into the first electrolytic hydrogen production device. The first electrolytic hydrogen production device can perform electrocatalytic oxidation coupled hydrogen production on the first water to be electrolyzed (that is, it can perform electrocatalytic oxidation treatment on the first water to be electrolyzed and produce hydrogen at the same time). The second water to be electrolyzed preparation device can adjust the electrocatalytically oxidized and purified wastewater into the second water to be electrolyzed. The second electrolytic hydrogen production device is used to perform alkaline electrolytic water hydrogen production or PEM electrolytic water hydrogen production on the second water to be electrolyzed.

[0033] Since the raw material entering the first water to be electrolyzed preparation device is the wastewater after pre-purification treatment in the corresponding wastewater treatment plant, the first water to be electrolyzed preparation device no longer needs to perform complex and large-scale wastewater pretreatment.

[0034] Since the first electrolytic hydrogen production device can perform electrocatalytic oxidation treatment on the first water to be electrolyzed, and the electrocatalytic oxidation treatment can effectively remove pollutants (such as organic matter and salts) in the water, it helps to meet the water quality requirements for alkaline electrolytic water hydrogen production, PEM electrolytic water hydrogen production or saline water electrolytic hydrogen production of the second water to be electrolyzed while simplifying the structure and function of the second water to be electrolyzed preparation device.

[0035] In addition, by jointly producing hydrogen through the first electrolytic hydrogen production device and the second electrolytic hydrogen production device, the hydrogen production output is increased.

[0036] The hydrogen production equipment of the above ecological city energy conversion, wastewater treatment and carbon reduction system is specifically applied to a new type of ecological city energy conversion, wastewater treatment and carbon reduction system, realizing the organic combination of energy conversion (eventually converting green electricity into fuel), wastewater treatment and carbon reduction.

[0037] Another object of the present invention is to provide a building-level ecological system integrating energy conversion, wastewater treatment and carbon reduction, which can apply the construction idea of the above ecological city energy conversion, wastewater treatment and carbon reduction system to the building scenario, so that the building becomes a small ecological system.

[0038] Therefore, in the second aspect of the present invention, a building-level ecological system integrating energy conversion, wastewater treatment and carbon reduction is provided, including:

[0039] Wastewater purification coupled electrolytic hydrogen production system, which uses green electricity to electrocatalytically oxidize and electrolyze water to produce hydrogen from domestic and industrial wastewater inside buildings;

[0040] Hydrocarbon synthetic fuel production system, which is used to react hydrogen produced by the wastewater purification coupled electrolytic hydrogen production system with carbon dioxide to synthesize fuel;

[0041] The wastewater purification coupled electrolytic hydrogen production system specifically includes:

[0042] The first water to be electrolyzed preparation device, whose input end is connected to the corresponding wastewater diversion point and whose output end is connected to the first electrolytic hydrogen production device, and is used to adjust the domestic and industrial wastewater into the first water to be electrolyzed;

[0043] The first electrolytic hydrogen production device, which is used to electrocatalytically oxidize and couple hydrogen production from the first water to be electrolyzed, and output the electrocatalytically oxidized and purified wastewater;

[0044] The second water to be electrolyzed preparation device, whose input end is connected to the first electrolytic hydrogen production device and whose output end is connected to the second electrolytic hydrogen production device, and is used to adjust the electrocatalytically oxidized and purified wastewater into the second water to be electrolyzed;

[0045] The second electrolytic hydrogen production device, which is used to perform alkaline electrolytic water hydrogen production or PEM electrolytic water hydrogen production on the second water to be electrolyzed.

[0046] According to an embodiment of the present invention, it further includes a green electricity production system, which is used to provide green electricity for electrocatalytic oxidation and electrolytic water hydrogen production to the wastewater purification coupled electrolytic hydrogen production system.

[0047] According to an embodiment of the present invention, the green electricity production system includes a photovoltaic power generation device. The photovoltaic power generation device includes rooftop photovoltaic modules and / or thin-film photovoltaic modules.

[0048] According to an embodiment of the present utility model, the second electrolytic hydrogen production device includes a plurality of independent second electrolytic hydrogen production modules, and the second water to be electrolyzed preparation device includes a water storage device capable of providing the second water to be electrolyzed to each of the second electrolytic hydrogen production modules in the plurality of second electrolytic hydrogen production modules respectively; moreover, the first electrolytic hydrogen production device and each of the second electrolytic hydrogen production modules in the plurality of second electrolytic hydrogen production modules can be independently controlled, so that: when the green electricity provided by the green electricity production system to the wastewater purification coupled electrolytic hydrogen production system is at the peak stage, the first water to be electrolyzed preparation device and each of the second electrolytic hydrogen production modules in the plurality of second electrolytic hydrogen production modules all operate; when the green electricity provided by the green electricity production system to the wastewater purification coupled electrolytic hydrogen production system is at the trough stage, the first water to be electrolyzed preparation device stops operating, and all or part of the second electrolytic hydrogen production modules in the plurality of second electrolytic hydrogen production modules operate according to the green electricity supply situation.

[0049] According to an embodiment of the present utility model, an oxygen supply system is further included, and the oxygen supply system is used for recovering and storing the oxygen generated by the wastewater purification coupled electrolytic hydrogen production system and providing it for use inside the building.

[0050] According to an embodiment of the present utility model, the building is a swimming pool building, and the domestic and industrial wastewater is swimming pool water.

[0051] According to an embodiment of the present utility model, a heating system is further included, the heating system includes a boiler and indoor heating facilities connected to the boiler, and the boiler uses the fuel to burn to generate heat and provide it for the indoor heating facilities.

[0052] According to an embodiment of the present utility model, the hydrocarbon synthesis fuel production system adopts a methane / methanol synthesis device.

[0053] According to an embodiment of the present utility model, the second water to be electrolyzed preparation device includes a cascaded reverse osmosis membrane filtration device, a continuous electrodeionization device, and an ion exchange desalination device using polished resin, which are arranged in sequence from front to back; the cascaded reverse osmosis membrane filtration device includes a high-pressure reverse osmosis membrane filtration device and a low-pressure reverse osmosis membrane filtration device arranged in sequence from front to back, the clear water outlet of the high-pressure reverse osmosis membrane filtration device is connected to the water inlet of the low-pressure reverse osmosis membrane filtration device, the clear water outlet of the low-pressure reverse osmosis membrane filtration device is connected to the water inlet of the continuous electrodeionization device, and the concentrated water outlet of the low-pressure reverse osmosis membrane filtration device is connected to the water inlet of the second water to be electrolyzed preparation device.

[0054] According to an embodiment of the present utility model, the first water to be electrolyzed preparation device and / or the second water to be electrolyzed preparation device respectively form a movable skid-mounted structure; a water treatment module configuration area, a water storage module configuration area, and a water pump delivery module configuration area are provided in the movable skid-mounted structure. All or part of the water treatment modules selected from a variety of different water treatment modules are configured and installed in the water treatment module configuration area. An input-side water storage device and an output-side water storage device that are connected to each water treatment module installed in the water treatment module configuration area one by one are configured and installed in the water storage module configuration area. A water pump delivery module corresponding to each water treatment module installed in the water treatment module configuration area is configured and installed in the water pump delivery module configuration area. Each water pump delivery module is used to drive the water in the input-side water storage device connected to the corresponding water treatment module to enter the output-side water storage device connected to the corresponding water treatment module after passing through the corresponding water treatment module.

[0055] The building-level ecosystem integrating energy conversion, wastewater treatment, and carbon reduction in the second aspect above can explore the hydrogen production potential of the domestic and industrial wastewater inside large and medium-sized buildings such as shopping malls, hospitals, supermarkets, office buildings, and swimming pools, and the produced fuel can be used inside the buildings.

[0056] Another object of the present utility model is to provide a hydrogen production equipment applied to the above-mentioned ecological city energy conversion, wastewater treatment, and carbon reduction system, as well as a water purification coupled electrolytic hydrogen production system in the building-level ecosystem integrating energy conversion, wastewater treatment, and carbon reduction.

[0057] For this reason, in the third aspect of the present utility model, a wastewater purification coupled electrolytic hydrogen production system is provided, including:

[0058] A first water to be electrolyzed preparation device, the input end of the first water to be electrolyzed preparation device is connected to a wastewater intake point and the output end is connected to a first electrolytic hydrogen production device, and is used to adjust the wastewater obtained from the wastewater intake point into the first water to be electrolyzed;

[0059] A first electrolytic hydrogen production device, the first electrolytic hydrogen production device is used for electrocatalytic oxidation coupling hydrogen production of the first water to be electrolyzed, and outputs the electrocatalytically oxidized and purified wastewater;

[0060] A second water to be electrolyzed preparation device, the input end of the second water to be electrolyzed preparation device is connected to the first electrolytic hydrogen production device and the output end is connected to a second electrolytic hydrogen production device, and is used to adjust the electrocatalytically oxidized and purified wastewater into the second water to be electrolyzed;

[0061] A second electrolytic hydrogen production device, the second electrolytic hydrogen production device is used for alkaline electrolytic water hydrogen production, PEM electrolytic water hydrogen production, or saline water electrolytic hydrogen production of the second water to be electrolyzed.

[0062] According to an embodiment of the present utility model, the first electrolytic hydrogen production device includes: a first electrocatalytic oxidation coupled hydrogen production device, which is used for performing first electrocatalytic oxidation coupled hydrogen production on the first water to be electrolyzed and outputting first electrocatalytic oxidation purified wastewater. The anodic electrochemical reaction of the first electrocatalytic oxidation coupled hydrogen production is mainly used to remove organic matter and ammonia nitrogen in water; a second electrocatalytic oxidation coupled hydrogen production device, which is used for performing second electrocatalytic oxidation coupled hydrogen production on the first electrocatalytic oxidation purified wastewater and outputting second electrocatalytic oxidation purified wastewater. The anodic electrochemical reaction of the second electrocatalytic oxidation coupled hydrogen production is mainly used for desalination; wherein, the second electrocatalytic oxidation purified wastewater serves as the electrocatalytic oxidation purified wastewater output by the first electrolytic hydrogen production device.

[0063] According to an embodiment of the present utility model, the first electrolytic hydrogen production device further includes: a first electrocatalytic oxidation purified water adjustment device, the input end of which is connected to the first electrocatalytic oxidation coupled hydrogen production device and the output end of which is connected to the second electrocatalytic oxidation coupled hydrogen production device, and is used to adjust the first electrocatalytic oxidation purified wastewater output by the first electrocatalytic oxidation coupled hydrogen production device into the first electrocatalytic oxidation purified wastewater that meets the water inlet requirements of the second electrocatalytic oxidation coupled hydrogen production device.

[0064] According to an embodiment of the present utility model, the water inlet requirements of the first electrolytic hydrogen production device or the first electrocatalytic oxidation coupled hydrogen production device are: the pH value is 5-9, the chemical oxygen demand (COD cr ) ≤ 3500 mg / L, the biochemical oxygen demand (BOD 5 ) ≤ 200 mg / L, the ammonia nitrogen ≤ 1000 mg / L, and the suspended solids ≤ 10 mg / L.

[0065] According to an embodiment of the present utility model, the second electrolytic hydrogen production device includes a plurality of independent second electrolytic hydrogen production modules, and the second water to be electrolyzed preparation device includes a water storage device capable of respectively providing second water to be electrolyzed for each of the second electrolytic hydrogen production modules in the plurality of second electrolytic hydrogen production modules.

[0066] According to an embodiment of the present utility model, the first electrolytic hydrogen production device is a 100 kW-class electrolytic hydrogen production device or an MW-class electrolytic hydrogen production device, and the power of each of the second electrolytic hydrogen production modules in the plurality of second electrolytic hydrogen production modules is one order of magnitude lower than that of the first electrolytic hydrogen production device and respectively adopts a 10 kW-class electrolytic cell or a 100 kW-class electrolytic cell.

[0067] According to an embodiment of the present utility model, the first water to be electrolyzed preparation device and / or the second water to be electrolyzed preparation device respectively form a movable skid-mounted structure; a water treatment module configuration area, a water storage module configuration area and a water pump delivery module configuration area are provided in the movable skid-mounted structure. All or part of the water treatment modules selected from a variety of different water treatment modules are configured and installed in the water treatment module configuration area. An input-side water storage device and an output-side water storage device that are respectively connected to each water treatment module installed in the water treatment module configuration area are configured and installed in the water storage module configuration area. A water pump delivery module corresponding to each water treatment module installed in the water treatment module configuration area is configured and installed in the water pump delivery module configuration area. Each water pump delivery module is used to drive the water in the input-side water storage device connected to the corresponding water treatment module to enter the output-side water storage device connected to the corresponding water treatment module after passing through the corresponding water treatment module.

[0068] According to an embodiment of the present utility model, the second water to be electrolyzed preparation device includes a cascaded reverse osmosis membrane filtration device, a continuous electrodeionization device and an ion exchange desalination device using polished resin, which are arranged in sequence from front to back.

[0069] According to an embodiment of the present utility model, the second water to be electrolyzed preparation device includes a cascaded reverse osmosis membrane filtration device, a continuous electrodeionization device and an ion exchange desalination device using polished resin, which are arranged in sequence from front to back; the cascaded reverse osmosis membrane filtration device includes a high-pressure reverse osmosis membrane filtration device and a low-pressure reverse osmosis membrane filtration device arranged in sequence from front to back. The high-pressure reverse osmosis membrane filtration device is connected to the water inlet of the low-pressure reverse osmosis membrane filtration device. The clear water outlet of the low-pressure reverse osmosis membrane filtration device is connected to the water inlet of the continuous electrodeionization device. The concentrated water outlet of the low-pressure reverse osmosis membrane filtration device is connected to the water inlet of the second water to be electrolyzed preparation device.

[0070] According to an embodiment of the present utility model, the low-pressure reverse osmosis membrane filtration device adopts a spiral wound reverse osmosis membrane filtration device, and the high-pressure reverse osmosis membrane filtration device adopts a disk tube reverse osmosis membrane filtration device.

[0071] The following further describes the present utility model in conjunction with the accompanying drawings and specific embodiments. The additional aspects and advantages of the present utility model will be partially given in the following description, partially become apparent from the following description, or be understood through practice. Description of the Drawings

[0072] The drawings forming a part of this specification are used to assist in understanding the present utility model. The content provided in the drawings and the related description in this specification can be used to explain the present utility model, but do not constitute an improper limitation to the present utility model.

[0073] Figure 1This is a diagram of an ecological city energy conversion, wastewater treatment, and carbon reduction system according to an embodiment of the present utility model.

[0074] Figure 2 This is a schematic structural diagram of a wastewater purification coupled electrolytic hydrogen production system according to an embodiment of the present utility model.

[0075] Figure 3 For Figure 2 This is a schematic structural diagram of the second water to be electrolyzed preparation device in

[0076] Figure 4 For Figure 2 This is a schematic structural diagram of the second water to be electrolyzed preparation device in

[0077] Figure 5 This is a schematic diagram of a building-level ecological system integrating energy conversion, wastewater treatment, and carbon reduction according to an embodiment of the present utility model when the building is a swimming pool building and the domestic and industrial wastewater is swimming pool water. Detailed implementation manners

[0078] The present utility model will be clearly and completely described below with reference to the accompanying drawings. Those of ordinary skill in the art will be able to implement the present utility model based on these descriptions. Before describing the present utility model with reference to the accompanying drawings, it should be particularly noted that:

[0079] The technical solutions and technical features provided in each part including the following description can be combined with each other without conflict. In addition, where possible, these technical solutions, technical features, and related combinations can be given specific technical themes and be protected by relevant patents.

[0080] The embodiments of the present utility model involved in the following description are usually only some embodiments rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on these embodiments shall fall within the scope of patent protection.

[0081] Regarding the terms and units in this specification: The terms "including", "comprising", "having" and any variations thereof in this specification and the corresponding claims and related parts are intended to cover non-exclusive inclusion. In addition, other related terms and units can be reasonably interpreted based on the relevant content provided in this specification.

[0082] Figure 1 This is a diagram of an ecological city energy conversion, wastewater treatment, and carbon reduction system according to an embodiment of the present utility model. As Figure 1As shown, the energy conversion, wastewater treatment and carbon reduction system of the ecological city realizes the organic combination of energy conversion (finally converting green electricity into fuel), wastewater treatment and carbon reduction. The specific construction of the energy conversion, wastewater treatment and carbon reduction system of the ecological city is as follows:

[0083] A green electricity production system 11, in which a green electricity production operation big data system 111 and a green electricity production factory 112 covered by the green electricity production operation big data system 111 are established.

[0084] A wastewater purification system 12, in which a wastewater treatment factory 121 is established, and the wastewater treatment factory 121 is used for purifying wastewater.

[0085] An electrolytic water hydrogen production system 13, in which an electrolytic water hydrogen production operation big data system 131 and an electrolytic hydrogen production factory 132 covered by the electrolytic water hydrogen production operation big data system 131 are established.

[0086] A carbon dioxide capture system 14, in which a carbon dioxide capture operation big data system 141 and a carbon dioxide capture factory 142 covered by the carbon dioxide capture operation big data system 141 are established.

[0087] A hydrocarbon synthetic fuel production system 15, in which a hydrocarbon synthetic fuel operation big data system 151 and a hydrocarbon synthetic fuel production factory 152 covered by the hydrocarbon synthetic fuel operation big data system 151 are established.

[0088] Among them, a green electricity transmission network is established between the green electricity production system 11 and the electrolytic water hydrogen production system 13, a hydrogen transmission network is established between the electrolytic water hydrogen production system 13 and the hydrocarbon synthetic fuel production system 15, and a carbon source transmission network is established between the carbon dioxide capture system 1 and the hydrocarbon synthetic fuel production system 15.

[0089] Among them, a wastewater purification coupled electrolytic hydrogen production system 16 is deployed in the electrolytic water hydrogen production system 13. Figure 2 It is a structural schematic diagram of a wastewater purification coupled electrolytic hydrogen production system according to an embodiment of the present invention. As Figures 1-2 shown, the above-mentioned wastewater purification coupled electrolytic hydrogen production system 16 uses the green electricity provided by the green electricity transmission network to perform electrocatalytic oxidation of wastewater and electrolytic water hydrogen production. The wastewater purification coupled electrolytic hydrogen production system 16 specifically includes: a first electrolytic water preparation device 161, a first electrolytic hydrogen production device 162, a second electrolytic water preparation device 163, and a second electrolytic hydrogen production device 164.

[0090] The input end of the first water to be electrolyzed preparation device 161 is connected to the water intake point in the corresponding wastewater treatment plant 121, and the output end is connected to the first hydrogen production device by electrolysis 162, which is used to adjust the wastewater after pre-purification treatment in the wastewater treatment plant 121 into the first water to be electrolyzed.

[0091] The first hydrogen production device by electrolysis 162 is used for electrocatalytic oxidation coupling hydrogen production of the first water to be electrolyzed, and outputs the wastewater purified by electrocatalytic oxidation.

[0092] The input end of the second water to be electrolyzed preparation device 163 is connected to the first hydrogen production device by electrolysis 162, and the output end is connected to the second hydrogen production device by electrolysis 164, which is used to adjust the wastewater purified by electrocatalytic oxidation into the second water to be electrolyzed.

[0093] The second hydrogen production device by electrolysis 164 is used for alkaline electrolytic water hydrogen production, PEM electrolytic water hydrogen production or brine electrolytic water hydrogen production of the second water to be electrolyzed.

[0094] Among them, the electrocatalytic oxidation coupling hydrogen production means that the first hydrogen production device by electrolysis 162 uses the oxidation of the anode (usually a titanium-based metal oxide coated electrode), and / or uses the electric field to generate free radicals to promote the oxidation and decomposition of pollutants, thereby realizing wastewater treatment. At the same time, the first hydrogen production device by electrolysis 162 uses the cathode to produce hydrogen and recycle it. The first hydrogen production device by electrolysis 162 has low requirements for the water quality of the first water to be electrolyzed, and generally only needs to remove suspended solids and oil.

[0095] Among them, the alkaline electrolytic water hydrogen production and PEM electrolytic water hydrogen production both belong to conventional electrolytic water hydrogen production technologies. In brine electrolytic water hydrogen production, the second water to be electrolyzed entering the second hydrogen production device by electrolysis 164 is brine, rather than the alkaline water required for alkaline electrolytic water hydrogen production and the pure water required for PEM electrolytic water hydrogen production.

[0096] Since the raw material entering the first water to be electrolyzed preparation device 161 is the wastewater after pre-purification treatment in the corresponding wastewater treatment plant 121, the first water to be electrolyzed preparation device 161 no longer needs to perform complex and large-scale wastewater pretreatment (mainly wastewater suspended solids removal equipment and wastewater oil removal equipment).

[0097] Since the first hydrogen production device by electrolysis 162 can perform electrocatalytic oxidation treatment on the first water to be electrolyzed, and the electrocatalytic oxidation treatment can effectively remove pollutants (such as organic matter and salt) in the water, it helps to meet the water quality requirements of alkaline electrolytic water hydrogen production, PEM electrolytic water hydrogen production or brine electrolytic water hydrogen production for the second water to be electrolyzed while simplifying the structure and function of the second water to be electrolyzed preparation device 163.

[0098] In addition, by jointly producing hydrogen using the first hydrogen production by electrolysis device 162 and the second hydrogen production by electrolysis device 164, the hydrogen production yield is increased.

[0099] In an alternative embodiment, the first hydrogen production by electrolysis device specifically includes: a first electrocatalytic oxidation coupled hydrogen production device 162a and a second electrocatalytic oxidation coupled hydrogen production device 162b.

[0100] Among them, the first electrocatalytic oxidation coupled hydrogen production device 162a is used to perform first electrocatalytic oxidation coupled hydrogen production on the first water to be electrolyzed and output first electrocatalytic oxidation purified wastewater. The anodic electrochemical reaction of the first electrocatalytic oxidation coupled hydrogen production is mainly used to remove organic matter and ammonia nitrogen in the water.

[0101] The second electrocatalytic oxidation coupled hydrogen production device 162b is used to perform second electrocatalytic oxidation coupled hydrogen production on the first electrocatalytic oxidation purified wastewater and output second electrocatalytic oxidation purified wastewater. The anodic electrochemical reaction of the second electrocatalytic oxidation coupled hydrogen production is mainly used for desalination.

[0102] Among them, the second electrocatalytic oxidation purified wastewater serves as the electrocatalytic oxidation purified wastewater output by the first hydrogen production by electrolysis device.

[0103] Furthermore, the first hydrogen production by electrolysis device may further include: a first electrocatalytic oxidation purified wastewater adjustment device 162c. The input end of the first electrocatalytic oxidation purified wastewater adjustment device 162c is connected to the first electrocatalytic oxidation coupled hydrogen production device and the output end is connected to the second electrocatalytic oxidation coupled hydrogen production device, and is used to adjust the first electrocatalytic oxidation purified wastewater output by the first electrocatalytic oxidation coupled hydrogen production device into first electrocatalytic oxidation purified wastewater that meets the inlet requirements of the second electrocatalytic oxidation coupled hydrogen production device.

[0104] Dividing the first hydrogen production by electrolysis device into a first electrocatalytic oxidation coupled hydrogen production device 162a and a second electrocatalytic oxidation coupled hydrogen production device 162b can remove different types of pollutants in the wastewater step by step, improving the wastewater treatment efficiency.

[0105] The first electrocatalytic oxidation coupled hydrogen production device 162a mainly removes organic matter and ammonia nitrogen in the wastewater. Organic matter and ammonia nitrogen are the main pollutants in the wastewater and need to be removed preferentially. Through the anodic electrochemical reaction of the first electrocatalytic oxidation coupled hydrogen production device 162a, the organic matter in the wastewater can be oxidized and decomposed, the ammonia nitrogen can be converted into nitrogen gas, and hydrogen gas is generated at the cathode, realizing the coupling of pollutant removal and hydrogen production.

[0106] The second electrocatalytic oxidation coupled hydrogen production device 162b is mainly used for desalination. After being treated by the first electrocatalytic oxidation coupled hydrogen production device 162a, most of the organic matters and ammonia nitrogen in the wastewater have been removed, and the remaining main pollutants are salts. Through the anodic electrochemical reaction of the second electrocatalytic oxidation coupled hydrogen production device 162b, the salts in the wastewater can be removed, further improving the quality of wastewater treatment, while continuously generating hydrogen at the cathode.

[0107] The first electrocatalytic oxidation purified wastewater adjustment device 162c is set to ensure that the influent water quality of the second electrocatalytic oxidation coupled hydrogen production device 162b meets the requirements. Different electrocatalytic oxidation coupled hydrogen production devices have different requirements for the influent water quality. By adjusting the device 162c to make necessary adjustments to the first electrocatalytic oxidation purified wastewater (such as adding chloride salts to generate strongly oxidizing hypochlorite ions during electrolysis), the effect of subsequent treatment can be ensured.

[0108] Furthermore, the second electrolytic hydrogen production device 164 includes a plurality of independent second electrolytic hydrogen production modules 164a, and the second water to be electrolyzed preparation device 163 includes a water storage device capable of respectively providing the second water to be electrolyzed for each of the plurality of second electrolytic hydrogen production modules 164a in the plurality of second electrolytic hydrogen production modules 164a.

[0109] When the green electricity generated by the green electricity production system and supplied to the wastewater purification coupled electrolytic hydrogen production system through the green electricity transmission network is at the peak stage, the first electrolytic hydrogen production device 162 and each of the plurality of second electrolytic hydrogen production modules 164a in the plurality of second electrolytic hydrogen production modules 164a all operate.

[0110] When the green electricity generated by the green electricity production system and supplied to the wastewater purification coupled electrolytic hydrogen production system through the green electricity transmission network is at the trough stage, the first electrolytic hydrogen production device 162 stops operating, and all or part of the plurality of second electrolytic hydrogen production modules 164a operate according to the supply situation of the green electricity.

[0111] Thus, the peak and trough characteristics of the green electricity can be fully utilized to improve the operating efficiency and economy of the system. Specifically:

[0112] First, setting a plurality of independent second electrolytic hydrogen production modules 164a can flexibly adjust the number of operating modules according to the supply situation of the green electricity, avoiding the problem of low operating efficiency of high-power electrolytic hydrogen production devices at the trough stage of the green electricity.

[0113] Second, at the peak stage of the green electricity, the green electricity supply is sufficient. At this time, all operating the first electrolytic hydrogen production device 162 and all the second electrolytic hydrogen production modules 164a can maximize the utilization of the green electricity for hydrogen production and wastewater treatment.

[0114] Third, during the trough stage of green power, the supply of green power is relatively insufficient. At this time, the first electrolytic hydrogen production device 162 is stopped, and only part or all of the second electrolytic hydrogen production modules 164a are operated according to the supply of green power. This can ensure the hydrogen production and wastewater treatment tasks while avoiding energy waste caused by insufficient green power.

[0115] Fourth, a water storage device is provided in the second water to be electrolyzed preparation device 163, which can store more water to be electrolyzed when the green power is sufficient and continue to supply it to the second electrolytic hydrogen production module 164a when the green power is insufficient, ensuring the continuity and stability of its operation.

[0116] In an alternative embodiment, the first electrolytic hydrogen production device is a 100kW-class electrolytic hydrogen production device or an MW-class electrolytic hydrogen production device, and the power of each second electrolytic hydrogen production module in the plurality of second electrolytic hydrogen production modules is one order of magnitude lower than that of the first electrolytic hydrogen production device, and 10kW-class electrolytic cells or 100kW-class electrolytic cells are respectively used.

[0117] The first electrolytic hydrogen production device adopts a relatively large power (100kW-class or MW-class), which can quickly treat a large amount of wastewater and produce hydrogen during the peak stage of green power, make full use of the surplus green power, and improve the hydrogen production efficiency.

[0118] The second electrolytic hydrogen production module adopts a relatively small power (10kW-class or 100kW-class), which can flexibly adjust the number of operating modules according to the power supply situation during the trough stage of green power. When the green power is insufficient, only some modules can be operated, avoiding the problem of low operating efficiency of high-power devices under low load and reducing energy waste at the same time.

[0119] The power of the second electrolytic hydrogen production module is one order of magnitude lower than that of the first electrolytic hydrogen production device, which means that the second electrolytic hydrogen production device includes a plurality of second electrolytic hydrogen production modules. This design can achieve more refined regulation. For example, when the green power is slightly insufficient, one or two second electrolytic hydrogen production modules can be stopped; when the green power is severely insufficient, only the minimum number of second electrolytic hydrogen production modules can be retained for operation. This flexibility helps to ensure the continuity and stability of the system under the condition of green power fluctuation.

[0120] In summary, electrolytic cells of different grades are different in terms of manufacturing cost, operating efficiency, maintenance difficulty, etc. The unit hydrogen production cost of 100kW-class and MW-class electrolytic cells is usually lower than that of 10kW-class electrolytic cells, but the 10kW-class electrolytic cells have higher flexibility. Combining the two grades of electrolytic cells can achieve a balance between economy and flexibility.

[0121] Generally speaking, the water inlet requirements of the first electrolytic hydrogen production device or the first electrocatalytic oxidation coupled hydrogen production device are: the pH value is 5-9, and the chemical oxygen demand (CODcr ) ≤ 3500 mg / L, Biochemical Oxygen Demand (BOD 5 ) ≤ 200 mg / L, Ammonia Nitrogen ≤ 1000 mg / L, Suspended Solids ≤ 10 mg / L.

[0122] Since the functions of the above-mentioned first water to be electrolyzed preparation device 161, the first electrocatalytic oxidation and purification wastewater adjustment device 162c, and the second water to be electrolyzed preparation device 163 are all to adjust the corresponding influent water to the water quality required for the subsequent corresponding electrolytic hydrogen production steps, therefore, their specific water treatment measures can be selected and combined from existing water treatment technologies according to the requirements of the water quality required for the subsequent corresponding electrolytic hydrogen production steps.

[0123] For example, when the influent water requirement of the first electrolytic hydrogen production device or the first electrocatalytic oxidation coupled hydrogen production device is a pH value of 5 - 9, Chemical Oxygen Demand (COD cr ) ≤ 3500 mg / L, Biochemical Oxygen Demand (BOD 5 ) ≤ 200 mg / L, Ammonia Nitrogen ≤ 1000 mg / L, Suspended Solids ≤ 10 mg / L, if the water quality of the wastewater after pre-purification treatment in the corresponding wastewater treatment plant 121 only fails to meet the suspended solids index, the first water to be electrolyzed preparation device 161 can adopt a combination of a precision (microfiltration) filter and an intermediate tank.

[0124] Figure 3 For Figure 2 the structural schematic diagram of the second water to be electrolyzed preparation device in Figure 4 For Figure 2 the structural schematic diagram of the second water to be electrolyzed preparation device in Figures 3-4 As shown, the first water to be electrolyzed preparation device 161 and / or the first water to be electrolyzed preparation device 163 respectively form a movable skid-mounted structure; in the movable skid-mounted structure, there are arranged a water treatment module configuration area, a water storage module configuration area, and a water pump delivery module configuration area. In the water treatment module configuration area, all or part of the water treatment modules selected from a variety of different water treatment modules are configured and installed. The water storage module configuration area is configured and installed with an input-side water storage device and an output-side water storage device that are respectively connected to each water treatment module installed in the water treatment module configuration area. The water pump delivery module configuration area is configured and installed with water pump delivery modules that are respectively corresponding to each water treatment module installed in the water treatment module configuration area. Each water pump delivery module is used to drive the water in the input-side water storage device connected to the corresponding water treatment module to enter the output-side water storage device connected to the corresponding water treatment module after passing through the corresponding water treatment module.

[0125] The first water to be electrolyzed preparation device 161 and / or the second electrolytic hydrogen production device 163 are designed as movable skid-mounted structures, and a water treatment module configuration area, a water storage module configuration area, and a water pump delivery module configuration area are arranged therein. The main purpose is to improve the modularity, flexibility, and adaptability of the system, facilitating rapid assembly, disassembly, and movement according to different application scenarios and requirements.

[0126] Specifically, by adopting a movable skid-mounted structure, the first water to be electrolyzed preparation device 161 and / or the second electrolytic hydrogen production device 163 can be manufactured into standardized modules, facilitating factory prefabrication and on-site assembly. This design can significantly shorten the construction period of the system, reduce the on-site construction difficulty, and improve the construction quality and efficiency. In the movable skid-mounted structure, by arranging a water treatment module configuration area, a water storage module configuration area, and a water pump delivery module configuration area, appropriate water treatment modules, water storage devices, and water pump delivery modules can be flexibly selected and configured according to different water quality conditions and treatment requirements. This flexibility enables the system to adapt to different application scenarios and meet different treatment requirements. Connecting the water treatment module, the water storage device, and the water pump delivery module in one-to-one correspondence and arranging them in different areas respectively can achieve the orderly flow and efficient treatment of water. The water pump delivery module can drive the water to flow between different water treatment modules and water storage devices, ensuring the continuous operation of the system. At the same time, this layout also facilitates the operation, maintenance, and management of the system. Due to the adoption of a movable skid-mounted structure, when the system needs to be upgraded, modified, or maintained, each module can be conveniently disassembled, replaced, or maintained without causing a great impact on the operation of the entire system. This maintainability and upgradability can extend the service life of the system and reduce the operating cost of the system. The movable skid-mounted structure also enables the system to be conveniently moved and redeployed according to actual needs. In short, designing the first water to be electrolyzed preparation device 161 and / or the second electrolytic hydrogen production device 163 as movable skid-mounted structures and reasonably dividing the functional areas can improve the modularity, flexibility, and adaptability of the system, facilitating rapid assembly, disassembly, and movement, and meeting different application requirements.

[0127] Specifically, the second water to be electrolyzed preparation device 163 includes a cascaded reverse osmosis membrane filtration device, a continuous electrodeionization device, and an ion exchange desalination device using polished resin, which are arranged in sequence from front to back.

[0128] Specifically, as Figures 3-4As shown, the stepped reverse osmosis membrane filtration device includes a high-pressure reverse osmosis membrane filtration device 163a and a low-pressure reverse osmosis membrane filtration device 163b arranged in sequence from front to back. The clear water outlet of the high-pressure reverse osmosis membrane filtration device 163a is connected to the water inlet of the low-pressure reverse osmosis membrane filtration device 163b. The clear water outlet of the low-pressure reverse osmosis membrane filtration device 163b is connected to the water inlet of the continuous electrodeionization device. The concentrated water outlet of the low-pressure reverse osmosis membrane filtration device 163b is connected to the water inlet of the second water to be electrolyzed preparation device 163.

[0129] Specifically, the low-pressure reverse osmosis membrane filtration device 163b adopts a spiral wound reverse osmosis membrane filtration device, and the high-pressure reverse osmosis membrane filtration device 163a adopts a disc tube reverse osmosis membrane filtration device.

[0130] Specifically, as Figures 3-4 shown, each input-side water storage device and each output-side water storage device are designed as water tanks 163c arranged in sequence in the water storage module configuration area.

[0131] In addition, as can be seen from Figures 3-4 , the water tanks 163c are arranged and installed on one side of the movable skid-mounted structure base; while the water treatment module configuration area is arranged on the opposite side of the water tanks 163c.

[0132] Specifically, the water pump delivery module adopts a water pump 163d. In addition, the water pump delivery module configuration area is arranged in the end area of the water treatment module configuration area.

[0133] Figure 5 This is a schematic diagram of the building-level ecosystem integrating energy conversion, wastewater treatment and carbon reduction in the embodiment of the present invention when the building is a swimming pool building and the production and domestic wastewater is swimming pool water. This building-level ecosystem can apply the construction ideas of the above-mentioned ecological city energy conversion, wastewater treatment and carbon reduction system to the building scenario, so that the building becomes a small ecosystem. As Figure 5 shown, the building-level ecosystem integrating energy conversion, wastewater treatment and carbon reduction includes:

[0134] A wastewater purification coupled electrolytic hydrogen production system, which uses green electricity to electrocatalytically oxidize and electrolyze water to produce hydrogen from the production and domestic wastewater inside the building;

[0135] A carbon-hydrogen synthetic fuel production system, which is used to react hydrogen generated by the wastewater purification coupled electrolytic hydrogen production system with carbon dioxide to synthesize fuel.

[0136] Among them, the wastewater purification coupled electrolytic hydrogen production system specifically includes:

[0137] The first water to be electrolyzed preparation device, the input end of the first water to be electrolyzed preparation device is connected to the corresponding waste water diversion point and the output end is connected to the first hydrogen production device by electrolysis, and is used to adjust the production and domestic waste water into the first water to be electrolyzed;

[0138] The first hydrogen production device by electrolysis, the first hydrogen production device by electrolysis is used to carry out electrocatalytic oxidation coupling hydrogen production on the first water to be electrolyzed, and output the waste water purified by electrocatalytic oxidation;

[0139] The second water to be electrolyzed preparation device, the input end of the second water to be electrolyzed preparation device is connected to the first hydrogen production device by electrolysis and the output end is connected to the second hydrogen production device by electrolysis, and is used to adjust the waste water purified by electrocatalytic oxidation into the second water to be electrolyzed;

[0140] The second hydrogen production device by electrolysis, the second hydrogen production device by electrolysis is used to carry out alkaline electrolytic water hydrogen production, PEM electrolytic water hydrogen production or saline water electrolytic water hydrogen production on the second water to be electrolyzed.

[0141] In addition, the building-level ecosystem integrating energy conversion, waste water treatment and carbon reduction in the embodiment of the present utility model may further include a green power production system, and the green power production system is used to provide green power for electrocatalytic oxidation and electrolytic water hydrogen production to the waste water purification coupled electrolytic hydrogen production system.

[0142] Specifically, the green power production system includes a photovoltaic power generation device. More specifically, the photovoltaic power generation device includes a rooftop photovoltaic module and / or a thin-film photovoltaic module.

[0143] Further, the second hydrogen production device by electrolysis includes a plurality of independent second hydrogen production modules by electrolysis, and the second water to be electrolyzed preparation device includes a water storage device capable of respectively providing the second water to be electrolyzed for each of the second hydrogen production modules in the plurality of second hydrogen production modules by electrolysis.

[0144] The first hydrogen production device by electrolysis and each of the second hydrogen production modules in the plurality of second hydrogen production modules by electrolysis can be independently controlled, so that:

[0145] When the green power provided by the green power production system to the waste water purification coupled electrolytic hydrogen production system is at the peak stage, the first hydrogen production device by electrolysis and each of the second hydrogen production modules in the plurality of second hydrogen production modules by electrolysis all operate;

[0146] When the green power provided by the green power production system to the waste water purification coupled electrolytic hydrogen production system is at the trough stage, the first hydrogen production device by electrolysis stops operating, and all or part of the second hydrogen production modules in the plurality of second hydrogen production modules by electrolysis operate according to the green power supply situation.

[0147] Furthermore, the building-level ecosystem integrating energy conversion, wastewater treatment, and carbon reduction according to the embodiments of the present invention may further include an oxygen supply system, which is used to recover and store the oxygen generated by the wastewater purification coupled with the electrolytic hydrogen production system and supply it for use inside the building.

[0148] In the building-level ecosystem integrating energy conversion, wastewater treatment, and carbon reduction according to the embodiments of the present invention, the building is specifically a swimming pool building, and the domestic and industrial wastewater is swimming pool water. Therefore, the swimming pool can also be called an "eco-swimming pool".

[0149] Furthermore, the building-level ecosystem integrating energy conversion, wastewater treatment, and carbon reduction according to the embodiments of the present invention may further include a heating system, which includes a boiler and indoor heating facilities connected to the boiler. The boiler uses the fuel to burn and generate heat and supply it to the indoor heating facilities.

[0150] In the building-level ecosystem integrating energy conversion, wastewater treatment, and carbon reduction according to the embodiments of the present invention, the carbon-hydrogen synthetic fuel production system may specifically adopt a methane / methanol synthesis device.

[0151] In the building-level ecosystem integrating energy conversion, wastewater treatment, and carbon reduction according to the embodiments of the present invention, specifically, the second water to be electrolyzed preparation device includes a cascaded reverse osmosis membrane filtration device, a continuous electrodeionization device, and an ion exchange desalination device using polished resin, which are arranged in sequence. The cascaded reverse osmosis membrane filtration device includes a high-pressure reverse osmosis membrane filtration device and a low-pressure reverse osmosis membrane filtration device arranged in sequence. The clear water outlet of the high-pressure reverse osmosis membrane filtration device is connected to the water inlet of the low-pressure reverse osmosis membrane filtration device. The clear water outlet of the low-pressure reverse osmosis membrane filtration device is connected to the water inlet of the continuous electrodeionization device. The concentrated water outlet of the low-pressure reverse osmosis membrane filtration device is connected to the water inlet of the second water to be electrolyzed preparation device.

[0152] The first water to be electrolyzed preparation device and / or the second water to be electrolyzed preparation device respectively form a movable skid-mounted structure; a water treatment module configuration area, a water storage module configuration area, and a water pump delivery module configuration area are provided in the movable skid-mounted structure. All or part of the water treatment modules selected from a variety of different water treatment modules are configured and installed in the water treatment module configuration area. An input-side water storage device and an output-side water storage device that are connected to each water treatment module installed in the water treatment module configuration area one by one are configured and installed in the water storage module configuration area. A water pump delivery module corresponding to each water treatment module installed in the water treatment module configuration area is configured and installed in the water pump delivery module configuration area. Each water pump delivery module is used to drive the water in the input-side water storage device connected to the corresponding water treatment module to enter the output-side water storage device connected to the corresponding water treatment module after passing through the corresponding water treatment module.

[0153] The wastewater purification coupled electrolytic hydrogen production system in the building-level ecosystem integrating energy conversion, wastewater treatment, and carbon reduction of the embodiment of the present invention is Figure 2 the same as or similar to the wastewater purification coupled electrolytic hydrogen production system shown.

[0154] The above-mentioned building-level ecosystem integrating energy conversion, wastewater treatment, and carbon reduction has the following advantages: First, it realizes the self-sufficiency and circular utilization of energy inside the building. The system uses the domestic and industrial wastewater inside the building to produce hydrogen, and synthesizes hydrogen and carbon dioxide into fuel for uses such as heating inside the building, reducing the dependence on external energy and improving the energy utilization efficiency.

[0155] Second, it effectively treats the wastewater generated inside the building and reduces environmental pollution. The system deeply treats the domestic and industrial wastewater generated inside the building through electrocatalytic oxidation and electrolytic hydrogen production methods, not only reducing the wastewater discharge volume, but also improving the utilization efficiency of water resources.

[0156] Third, it comprehensively utilizes green electricity and improves the utilization rate of renewable energy. The system uses green electricity production systems such as photovoltaic power generation to provide the electricity required for electrolytic hydrogen production, produces a large amount of hydrogen when green electricity is surplus, and flexibly adjusts the operation of the hydrogen production module when green electricity is insufficient, maximizing the utilization of renewable energy and improving the energy utilization efficiency.

[0157] Fourth, it realizes carbon reduction and reduces greenhouse gas emissions. The system recovers and utilizes the oxygen generated during the electrolytic hydrogen production process, and synthesizes carbon dioxide and the produced hydrogen into fuel, realizing carbon cycle utilization, reducing greenhouse gas emissions, and facilitating the achievement of the carbon reduction goal of the building.

[0158] Fifth, the system is modularly designed, with strong flexibility and adaptability. The system adopts a movable skid-mounted structure and modular design, which can be flexibly configured and adjusted according to the different needs of buildings, facilitating rapid assembly, disassembly and movement, and adapting to different application scenarios.

[0159] Sixth, the integrated design concept realizes the coordination and coupling of multiple functions. The system integrates multiple functions such as wastewater treatment, hydrogen production, synthetic fuel, heat supply, and oxygen supply, achieving the coordination and coupling of goals such as energy conversion, wastewater treatment, and carbon reduction, reflecting the integration and intelligence of the system design.

[0160] This building-level ecosystem provides new ideas and solutions for the energy management and environmental governance of buildings, which is conducive to promoting the transformation of the building energy management model and facilitating green and low-carbon development.

[0161] The above has described the relevant content of the present utility model. Those of ordinary skill in the art will be able to implement the present utility model based on these descriptions. Based on the above content of this specification, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of patent protection.

Claims

1. Wastewater purification coupled with electrolysis hydrogen production system, characterized by: include: A first device for preparing water to be electrolyzed, wherein the input end of the first device for preparing water to be electrolyzed is connected to the wastewater intake point and the output end is connected to the first electrolysis hydrogen production device, and is used to adjust the wastewater obtained from the wastewater intake point into the first water to be electrolyzed; A first electrolytic hydrogen production device, the first electrolytic hydrogen production device is used to perform electrocatalytic oxidation coupled hydrogen production on the first water to be electrolyzed, and output electrocatalytically oxidized purified wastewater; A second device for preparing water to be electrolyzed, wherein the input end of the second device for preparing water to be electrolyzed is connected to the first electrolytic hydrogen production device and the output end is connected to the second electrolytic hydrogen production device, and is used to adjust the electrocatalytically oxidized purified wastewater into second water to be electrolyzed; The second electrolysis hydrogen production device is used to produce hydrogen by alkaline water electrolysis, PEM water electrolysis or brine electrolysis on the second water to be electrolyzed.

2. The water purification coupled electrolysis hydrogen production system according to claim 1, characterized in that: The first electrolytic hydrogen production device comprises: a first electrocatalytic oxidation coupled hydrogen production device, the first electrocatalytic oxidation coupled hydrogen production device is used to perform a first electrocatalytic oxidation coupled hydrogen production on the first water to be electrolyzed and output a first electrocatalytically oxidized purified wastewater, the anode electrochemical reaction of the first electrocatalytic oxidation coupled hydrogen production is mainly used to remove organic matter and ammonia nitrogen in water; a second electrocatalytic oxidation coupled hydrogen production device, the second electrocatalytic oxidation coupled hydrogen production device is used to perform a second electrocatalytic oxidation coupled hydrogen production on the first electrocatalytically oxidized purified wastewater and output second electrocatalytically oxidized purified wastewater, the anode electrochemical reaction of the second electrocatalytic oxidation coupled hydrogen production is mainly used for desalination; The second electrocatalytically oxidized purified wastewater is the electrocatalytically oxidized purified wastewater outputted from the first electrolytic hydrogen production device.

3. The water purification coupled electrolysis hydrogen production system according to claim 2, characterized in that: The first electrolysis hydrogen production device further comprises: A first electrocatalytically oxidized purified water adjustment device, wherein the input end of the first electrocatalytically oxidized purified water adjustment device is connected to the first electrocatalytically oxidized coupled hydrogen production device and the output end is connected to the second electrocatalytically oxidized coupled hydrogen production device, and is used to adjust the first electrocatalytically oxidized purified wastewater output by the first electrocatalytically oxidized coupled hydrogen production device to the first electrocatalytically oxidized purified wastewater that meets the water inlet requirements of the second electrocatalytically oxidized coupled hydrogen production device.

4. The water purification coupled electrolysis hydrogen production system according to claim 1, 2 or 3, characterized in that: The water requirements for the first electrolytic hydrogen production device or the first electrocatalytic oxidation coupled hydrogen production device are: pH value of 5-9, chemical oxygen demand (COD cr )≤3500mg / L, five-day biochemical oxygen demand (BOD5)≤200mg / L, ammonia nitrogen≤1000mg / L, suspended solids≤10mg / L.

5. The water purification coupled electrolysis hydrogen production system according to claim 1, characterized in that: The second electrolytic hydrogen production device includes a plurality of independent second electrolytic hydrogen production modules, and the second device for preparing water to be electrolyzed includes a water storage device capable of providing second water to be electrolyzed to each of the plurality of second electrolytic hydrogen production modules.

6. The water purification coupled electrolysis hydrogen production system according to claim 5, characterized in that: The first electrolytic hydrogen production device is a 100kW-class electrolytic hydrogen production device or a MW-class electrolytic hydrogen production device. The power of each of the multiple second electrolytic hydrogen production modules is one order of magnitude lower than that of the first electrolytic hydrogen production device and each adopts a 10kW-class electrolyzer or a 100kW-class electrolyzer.

7. The water purification coupled electrolysis hydrogen production system according to claim 5, characterized in that: The first device for preparing water to be electrolyzed and / or the second device for producing hydrogen by electrolysis respectively constitute movable skid-mounted structures; The movable skid-mounted structure is provided with a water treatment module configuration area, a water storage module configuration area and a water pumping module configuration area; the water treatment module configuration area is configured and installed with all or part of the water treatment modules selected from a variety of different water treatment modules; the water storage module configuration area is configured and installed with an input side water storage device and an output side water storage device connected one-to-one with each water treatment module installed in the water treatment module configuration area; the water pumping module configuration area is configured and installed with water pumping modules corresponding one-to-one with each water treatment module installed in the water treatment module configuration area; each water pumping module is used to drive the water in the input side water storage device connected to the corresponding water treatment module to pass through the corresponding water treatment module and then enter the output side water storage device connected to the corresponding water treatment module.

8. The water purification coupled electrolysis hydrogen production system according to claim 5, characterized in that: The second device for preparing water to be electrolyzed comprises a cascade reverse osmosis membrane filtration device, a continuous electrolysis desalination device, and an ion exchange desalination device using a polishing resin, which are sequentially arranged one after the other.

9. The water purification coupled electrolysis hydrogen production system according to claim 8, characterized in that: The cascade reverse osmosis membrane filtration device comprises a high-pressure reverse osmosis membrane filtration device and a low-pressure reverse osmosis membrane filtration device arranged in sequence, the high-pressure reverse osmosis membrane filtration device is connected to the water inlet of the low-pressure reverse osmosis membrane filtration device, the clean water outlet of the low-pressure reverse osmosis membrane filtration device is connected to the water inlet of the continuous electrolysis desalination device, and the concentrated water outlet of the low-pressure reverse osmosis membrane filtration device is connected to the water inlet of the second device for preparing water to be electrolyzed.

10. The water purification coupled electrolysis hydrogen production system according to claim 9, characterized in that: The low-pressure reverse osmosis membrane filtration device adopts a roll-type reverse osmosis membrane filtration device, and the high-pressure reverse osmosis membrane filtration device adopts a disc-tube reverse osmosis membrane filtration device.

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