Building-level ecological system integrating energy conversion, wastewater treatment and carbon dioxide reduction

Abstract

The utility model discloses a building-level ecological system integrating energy conversion, wastewater treatment and carbon dioxide reduction, which comprises a wastewater purification coupling electrolytic hydrogen production system and a hydrocarbon synthetic fuel production system, and the hydrocarbon synthetic fuel production system is used for reacting hydrogen generated by the wastewater purification coupling electrolytic hydrogen production system with carbon dioxide to synthesize fuel; the wastewater purification coupling electrolytic hydrogen production system specifically comprises a first to-be-electrolyzed water preparation device, wherein the input end of the first to-be-electrolyzed water preparation device is connected with a corresponding wastewater diversion point, and the output end of the first to-be-electrolyzed water preparation device is connected with a first electrolytic hydrogen production device; the first electrolytic hydrogen production device is used for carrying out electrocatalytic oxidation coupling hydrogen production on the first to-be-electrolyzed water; the input end of the second to-be-electrolyzed water preparation device is connected with the first electrolytic hydrogen production device, and the output end of the second to-be-electrolyzed water preparation device is connected with the second electrolytic hydrogen production device; 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 water to be electrolyzed.

Description

Technical Field

[0001] The utility model relates to a building-level ecological system integrating energy conversion, wastewater treatment and carbon dioxide reduction. Background Art

[0002] Eco-city development primarily involves two key areas: renewable energy system development and environmental governance. Regarding renewable energy system development, green electricity and hydrogen energy are currently the two main types of renewable energy. Green electricity primarily utilizes solar, wind, biomass, geothermal, and other energy sources through processes that produce zero or near-zero carbon dioxide emissions. Hydrogen energy, hailed as the "ultimate energy source of the 21st century," is currently one of the primary methods of hydrogen production through water electrolysis. Regarding environmental governance, wastewater and flue gas are the primary targets.

[0003] Flue gas often contains large amounts of carbon dioxide produced by combustion. Capturing and utilizing this carbon dioxide is a crucial aspect of carbon emission reduction. Carbon capture, utilization, and storage (CCUS) technology is the most effective and direct means of reducing carbon emissions. CCUS technology has made significant progress in recent years. The technology for synthesizing formaldehyde / methanol using hydrogen produced by water electrolysis and carbon dioxide captured using CCUS is now mature.

[0004] Wastewater treatment methods mainly include biological methods, electrochemical reaction (electrolysis) methods, membrane treatment methods, ion exchange methods, and evaporation crystallization methods. The biological method is to remove pollutants by oxidizing, decomposing, and adsorbing salts and organic matter in wastewater through the metabolism of microorganisms. The electrolysis method is to remove salts from water through electrolysis. The membrane treatment method uses the selective permeability differences of the membrane to separate, purify, and concentrate the target substances. The ion exchange method is a method of removing salts from the raw water by exchanging anions and cations in the salt-containing wastewater with anions and cations fixed by the ion exchange resin. The evaporation crystallization method is a method that uses the principle of evaporation to evaporate water, increase the salt concentration of the wastewater, and thus precipitate the salt.

[0005] Currently, the electrochemical reactors used in the electrolysis method are mainly electrocatalytic oxidation (EO) reactors and electrocoagulation (EC) reactors. Their basic structures are similar, consisting of an electrolysis device and a DC power supply, with the anode and cathode of the electrolysis device connected to the positive and negative terminals of the DC power supply, respectively. The main difference between the two is the electrode materials.

[0006] Electrocatalytic oxidation (EO) utilizes the oxidative action of an anode (typically a titanium-based metal oxide-coated electrode) and / or the generation of free radicals through an electric field to promote the oxidative decomposition of pollutants, thereby achieving wastewater treatment. This process can be further categorized into direct and indirect oxidation. Direct oxidation involves directly oxidizing pollutants on the anode surface to remove them. Indirect oxidation involves using an electric field to decompose water molecules, generating oxidants such as hydroxyl radicals, which then react with pollutants in the wastewater to remove them.

[0007] Electro-coagulation (EC) removes pollution by dissolving metal ions at the anode (usually an aluminum or iron electrode) into the wastewater. The metal hydroxides, through hydrolysis, act as flocculants to aggregate suspended solids and colloids in the wastewater. Simultaneously, hydrogen ions at the cathode gain electrons and are reduced to hydrogen gas, which overflows as tiny bubbles. This flotation action causes floccules and oils in the wastewater to float to the surface.

[0008] Currently, electrocatalytic oxidation and electrocoagulation technologies have relatively limited functionality and do not enable hydrogen recovery and utilization. However, with the development of the hydrogen source industry, the demand for hydrogen is constantly expanding. Utility Model Content

[0009] The purpose of this utility model is to provide a hydrogen production equipment for an eco-city energy conversion, wastewater treatment and carbon dioxide reduction system, so as to construct a new eco-city energy conversion, wastewater treatment and carbon dioxide reduction system based on the combination of wastewater treatment and electrolysis of water to produce hydrogen.

[0010] To this end, the first aspect of the present invention provides a hydrogen production equipment for an eco-city energy conversion, wastewater treatment and carbon dioxide reduction system, wherein the eco-city energy conversion, wastewater treatment and carbon dioxide reduction system is constructed with:

[0011] A green electricity production system, wherein the green electricity production system has established a green electricity production operation big data system and green electricity production plants covered by the green electricity production operation big data system;

[0012] A wastewater purification system, wherein the wastewater purification system includes a wastewater treatment plant, and the wastewater treatment plant is used to purify the wastewater;

[0013] A water electrolysis hydrogen production system, wherein the water electrolysis hydrogen production system is equipped with a water electrolysis hydrogen production operation big data system and an electrolysis hydrogen production plant covered by the water electrolysis hydrogen production operation big data system;

[0014] A carbon dioxide capture system, wherein the carbon dioxide capture system is equipped with a carbon dioxide capture operation big data system and a carbon dioxide capture plant covered by the carbon dioxide capture operation big data system;

[0015] A hydrocarbon synthetic fuel production system, wherein the hydrocarbon synthetic fuel production system is established with a hydrocarbon synthetic fuel operation big data system and a hydrocarbon synthetic fuel production plant covered by the hydrocarbon synthetic fuel operation big data system;

[0016] A green electricity transmission network is established between the green electricity production system and the water electrolysis hydrogen production system, a hydrogen transmission network is established between the water electrolysis hydrogen production system and the hydrocarbon synthesis fuel production system, and a carbon source transmission network is established between the carbon dioxide capture system and the hydrocarbon synthesis fuel production system;

[0017] It adopts a wastewater purification coupled electrolysis hydrogen production system, which uses the green electricity provided by the green electricity transmission network to electrocatalytically oxidize wastewater and electrolyze water to produce hydrogen. The wastewater purification coupled electrolysis hydrogen production system includes:

[0018] 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 a water inlet point in a corresponding wastewater treatment plant and the output end is connected to a first electrolysis hydrogen production device, and is used to adjust the wastewater in the wastewater treatment plant that has undergone pre-purification treatment to be the first water to be electrolyzed;

[0019] a first electrolytic hydrogen production device, the first electrolytic hydrogen production device being used to perform electrocatalytic oxidation coupled hydrogen production on the first water to be electrolyzed, and outputting electrocatalytically oxidized purified wastewater;

[0020] 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 electrolysis hydrogen production device and the output end is connected to the second electrolysis hydrogen production device, and is used to adjust the electrocatalytically oxidized purified wastewater into second water to be electrolyzed;

[0021] The second electrolysis hydrogen production device is used to produce hydrogen by alkaline electrolysis of the second water to be electrolyzed or by PEM electrolysis of the 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, 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, and the anode electrochemical reaction of the first electrocatalytic oxidation coupled hydrogen production is mainly used to remove organic matter and ammonia nitrogen in the 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 a second electrocatalytically oxidized purified wastewater, and the anode electrochemical reaction of the second electrocatalytic oxidation coupled hydrogen production is mainly used for desalination; wherein, the second electrocatalytically oxidized purified wastewater is the electrocatalytically oxidized purified wastewater output by the first electrocatalytic hydrogen production device.

[0023] According to an embodiment of the present invention, the first electrolytic hydrogen production device may include: a first electrocatalytically oxidized purified wastewater adjustment device, the input end of the first electrocatalytically oxidized purified wastewater 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.

[0024] According to the embodiment of the present invention, 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.

[0025] According to an embodiment of the present invention, the second electrolysis hydrogen production device may include: a plurality of independent second electrolysis hydrogen production modules, the second device for preparing water to be electrolyzed includes a water storage device capable of providing second water to be electrolyzed to each second electrolysis hydrogen production module in the plurality of second electrolysis hydrogen production modules respectively; when the green electricity power provided by the green electricity production system to the wastewater purification coupled electrolysis hydrogen production system through the green electricity transmission network is in a peak stage, the first electrolysis hydrogen production device and each second electrolysis hydrogen production module in the plurality of second electrolysis hydrogen production modules are all operated; when the green electricity power provided by the green electricity production system to the wastewater purification coupled electrolysis hydrogen production system through the green electricity transmission network is in a trough stage, the first electrolysis hydrogen production device stops operating, and the plurality of second electrolysis hydrogen production modules are all or partially operated according to the green electricity supply situation.

[0026] According to an embodiment of the present invention, the first electrolysis hydrogen production device is a 100kW-class electrolysis hydrogen production device or a MW-class electrolysis hydrogen production device, and the power of each second electrolysis hydrogen production module in the multiple second electrolysis hydrogen production modules is one order of magnitude lower than that of the first electrolysis hydrogen production device and respectively adopts a 10kW-class electrolyzer or a 100kW-class electrolyzer.

[0027] According to an embodiment of the present invention, the first device for preparing water to be electrolyzed and / or the second device for preparing water to be electrolyzed respectively constitute a movable skid-mounted structure; a water treatment module configuration area, a water storage module configuration area and a water pumping module configuration area are provided in the movable skid-mounted structure, and 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 to each water treatment module installed in the water treatment module configuration area, and 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.

[0028] According to an embodiment of the present invention, 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 arranged in sequence.

[0029] According to an embodiment of the present invention, the cascade 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 clean 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 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.

[0030] According to an embodiment of the present invention, 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.

[0031] The hydrogen production equipment of the eco-city energy conversion, wastewater treatment and carbon dioxide reduction system in the first aspect mentioned above adopts a wastewater purification coupled electrolysis hydrogen production system, which uses the green electricity provided by the green electricity transmission network to electrocatalytically oxidize wastewater and electrolyze water to produce hydrogen. The wastewater purification coupled electrolysis hydrogen production system includes: a first water preparation device to be electrolyzed, a first electrolysis hydrogen production device, a second water preparation device to be electrolyzed and a second electrolysis hydrogen production device.

[0032] Among them, the first water preparation device to be electrolyzed can adjust the wastewater that has undergone pre-purification treatment in the corresponding wastewater treatment plant into the first water to be electrolyzed and then input it into the first electrolysis hydrogen production device. The first electrolysis 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 preparation device to be electrolyzed can adjust the electrocatalytically oxidized purified wastewater into the second water to be electrolyzed. The second electrolysis hydrogen production device is used to perform alkaline water electrolysis hydrogen production or PEM water electrolysis hydrogen production on the second water to be electrolyzed.

[0033] Since the raw material entering the first device for preparing water to be electrolyzed is the wastewater that has been pre-purified in the corresponding wastewater treatment plant, the first device for preparing water to be electrolyzed no longer needs to perform complex and cumbersome wastewater pretreatment.

[0034] Since the first electrolysis hydrogen production device can perform electrocatalytic oxidation treatment on the first water to be electrolyzed, the electrocatalytic oxidation treatment can effectively remove pollutants (such as organic matter and salt) in the water. Therefore, it helps to simplify the structure and function of the second electrolysis water preparation device so that the second water to be electrolyzed meets the water quality requirements of alkaline water electrolysis hydrogen production, PEM water electrolysis hydrogen production or brine electrolysis hydrogen production.

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

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

[0037] Another object of the present invention is to provide a building-level ecosystem that integrates energy conversion, wastewater treatment and carbon dioxide reduction, and can apply the construction ideas of the above-mentioned eco-city energy conversion, wastewater treatment and carbon dioxide reduction system to building scenes, thereby making the building a small ecosystem.

[0038] To this end, the second aspect of the present invention provides a building-level ecosystem that integrates energy conversion, wastewater treatment, and carbon dioxide reduction, including:

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

[0040] A hydrocarbon synthetic fuel production system, wherein the hydrocarbon synthetic fuel production system is used to react the hydrogen produced by the wastewater purification coupled electrolysis hydrogen production system with carbon dioxide to synthesize fuel;

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

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

[0043] a first electrolytic hydrogen production device, the first electrolytic hydrogen production device being used to perform electrocatalytic oxidation coupled hydrogen production on the first water to be electrolyzed, and outputting electrocatalytically oxidized purified wastewater;

[0044] 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 electrolysis hydrogen production device and the output end is connected to the second electrolysis hydrogen production device, and is used to adjust the electrocatalytically oxidized purified wastewater into second water to be electrolyzed;

[0045] The second electrolysis hydrogen production device is used to produce hydrogen by alkaline electrolysis of the second water to be electrolyzed or by PEM electrolysis of the water.

[0046] According to an embodiment of the present invention, a green electricity production system is also included, which is used to provide green electricity for electrocatalytic oxidation and water electrolysis to produce hydrogen to the wastewater purification coupled electrolysis hydrogen production system.

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

[0048] According to an embodiment of the present invention, the second electrolysis hydrogen production device includes a plurality of independent second electrolysis hydrogen production modules, and the second device for preparing water to be electrolyzed includes a water storage device that can provide second water to be electrolyzed to each second electrolysis hydrogen production module in the plurality of second electrolysis hydrogen production modules respectively; and the first electrolysis hydrogen production device and each second electrolysis hydrogen production module in the plurality of second electrolysis hydrogen production modules can be independently controlled so that: when the green electricity power provided by the green electricity production system to the wastewater purification coupled electrolysis hydrogen production system is in a peak stage, the first device for preparing water to be electrolyzed and each second electrolysis hydrogen production module in the plurality of second electrolysis hydrogen production modules all operate; when the green electricity power provided by the green electricity production system to the wastewater purification coupled electrolysis hydrogen production system is in a trough stage, the first device for preparing water to be electrolyzed stops operating, and the plurality of second electrolysis hydrogen production modules all or partially operate according to the green electricity supply situation.

[0049] According to an embodiment of the present invention, an oxygen supply system is also included, which is used to recover and store the oxygen generated by the wastewater purification coupled electrolysis hydrogen production system and provide 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 production and living wastewater is swimming pool water.

[0051] According to an embodiment of the present invention, a heating system is further included, wherein the heating system includes a boiler and an indoor heating facility connected to the boiler, and the boiler generates heat by burning the fuel and provides heat to the indoor heating facility.

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

[0053] According to an embodiment of the present utility model, 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 equipment using a polishing resin, which are arranged in sequence; 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, which are arranged in sequence, the clean 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 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.

[0054] According to an embodiment of the present invention, the first device for preparing water to be electrolyzed and / or the second device for preparing water to be electrolyzed respectively constitute a movable skid-mounted structure; a water treatment module configuration area, a water storage module configuration area and a water pumping module configuration area are provided in the movable skid-mounted structure, and 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 to each water treatment module installed in the water treatment module configuration area, and 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.

[0055] The second aspect mentioned above is a building-level ecosystem that integrates energy conversion, wastewater treatment and carbon dioxide reduction. It can explore the potential for hydrogen production from domestic wastewater in medium and large buildings such as shopping malls, hospitals, supermarkets, office buildings, and swimming pools. The fuel produced can be used inside the buildings.

[0056] Another object of the present invention is to provide a hydrogen production equipment applied to the above-mentioned eco-city energy conversion, wastewater treatment and carbon dioxide reduction system, and a water purification coupled electrolysis hydrogen production system in a building-level ecosystem integrating energy conversion, wastewater treatment and carbon dioxide reduction.

[0057] To this end, the third aspect of the present invention provides a wastewater purification coupled electrolysis hydrogen production system, comprising:

[0058] 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;

[0059] a first electrolytic hydrogen production device, the first electrolytic hydrogen production device being used to perform electrocatalytic oxidation coupled hydrogen production on the first water to be electrolyzed, and outputting electrocatalytically oxidized purified wastewater;

[0060] 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 electrolysis hydrogen production device and the output end is connected to the second electrolysis hydrogen production device, and is used to adjust the electrocatalytically oxidized purified wastewater into second water to be electrolyzed;

[0061] 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.

[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, 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, and the anode electrochemical reaction of the first electrocatalytic oxidation coupled hydrogen production is mainly used to remove organic matter and ammonia nitrogen in the 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 a second electrocatalytically oxidized purified wastewater, and the anode electrochemical reaction of the second electrocatalytic oxidation coupled hydrogen production is mainly used for desalination; wherein, the second electrocatalytically oxidized purified wastewater is the electrocatalytically oxidized purified wastewater output by the first electrocatalytic hydrogen production device.

[0063] According to an embodiment of the present utility model, the first electrolytic hydrogen production device further includes: a first electrocatalytically oxidized purified water adjustment device, 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.

[0064] According to the embodiment of the present invention, 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.

[0065] According to an embodiment of the present invention, the second electrolysis hydrogen production device includes multiple independent second electrolysis hydrogen production modules, and the second device for preparing water to be electrolyzed includes a water storage device that can provide second water to be electrolyzed to each of the multiple second electrolysis hydrogen production modules.

[0066] According to an embodiment of the present invention, the first electrolysis hydrogen production device is a 100kW-class electrolysis hydrogen production device or a MW-class electrolysis hydrogen production device, and the power of each second electrolysis hydrogen production module in the multiple second electrolysis hydrogen production modules is one order of magnitude lower than that of the first electrolysis hydrogen production device and respectively adopts a 10kW-class electrolyzer or a 100kW-class electrolyzer.

[0067] According to an embodiment of the present invention, the first device for preparing water to be electrolyzed and / or the second device for preparing water to be electrolyzed respectively constitute a movable skid-mounted structure; a water treatment module configuration area, a water storage module configuration area and a water pumping module configuration area are provided in the movable skid-mounted structure, and 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 to each water treatment module installed in the water treatment module configuration area, and 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.

[0068] According to an embodiment of the present invention, 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 arranged in sequence.

[0069] According to an embodiment of the present utility model, 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 equipment using a polishing resin, which are arranged in sequence; 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, which are 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.

[0070] According to an embodiment of the present invention, 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.

[0071] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Additional aspects and advantages of the present invention will be partially given in the following description, partially become apparent from the following description, or be learned through practice. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] The drawings that constitute part of this specification are used to assist in understanding the present invention. The contents provided in the drawings and the related descriptions in this specification can be used to explain the present invention, but do not constitute an improper limitation on the present invention.

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

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

[0075] Figure 3 for Figure 2 Schematic diagram of the structure of the second device for preparing water to be electrolyzed.

[0076] Figure 4 for Figure 2 Schematic diagram of the structure of the second device for preparing water to be electrolyzed.

[0077] Figure 5 This is a schematic diagram of a building-level ecosystem integrating energy conversion, wastewater treatment and carbon dioxide reduction in an embodiment of the present invention when the building is a swimming pool building and the production and domestic wastewater is swimming pool water. DETAILED DESCRIPTION

[0078] The following is a clear and complete description of the present invention in conjunction with the accompanying drawings. A person skilled in the art will be able to implement the present invention based on these descriptions. Before describing the present invention in conjunction with the accompanying drawings, it should be noted that:

[0079] The technical solutions and technical features provided in each section, including the following description, may be combined with each other unless they conflict. In addition, where possible, these technical solutions, technical features, and related combinations may be assigned specific technical themes and protected by relevant patents.

[0080] The embodiments of the utility model involved in the following description are generally only a part of the embodiments rather than all the embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making any creative work should fall within the scope of patent protection.

[0081] Regarding terms and units in this specification: The terms "include," "comprising," "having," and any variations thereof in this specification, the corresponding claims, and related sections are intended to cover non-exclusive inclusions. Other relevant terms and units are to be reasonably interpreted based on the relevant content provided in this specification.

[0082] Figure 1 This is a diagram of an eco-city energy conversion, wastewater treatment and carbon dioxide reduction system according to an embodiment of the present invention. Figure 1As shown, the eco-city energy conversion, wastewater treatment and carbon dioxide reduction system realizes the organic combination of energy conversion (green electricity is ultimately converted into fuel), wastewater treatment and carbon dioxide reduction. The eco-city energy conversion, wastewater treatment and carbon dioxide reduction system is specifically constructed as follows:

[0083] The green electricity production system 11 includes a green electricity production operation big data system 111 and a green electricity production plant 112 covered by the green electricity production operation big data system 111 .

[0084] The wastewater purification system 12 includes a wastewater treatment plant 121 , which is used to purify wastewater.

[0085] The water electrolysis hydrogen production system 13 includes a water electrolysis hydrogen production operation big data system 131 and an electrolysis hydrogen production plant 132 covered by the water electrolysis hydrogen production operation big data system 131 .

[0086] The carbon dioxide capture system 14 includes a carbon dioxide capture operation big data system 141 and a carbon dioxide capture plant 142 covered by the carbon dioxide capture operation big data system 141 .

[0087] The hydrocarbon synthesis fuel production system 15 includes a hydrocarbon synthesis fuel operation big data system 151 and a hydrocarbon synthesis fuel production plant 152 covered by the hydrocarbon synthesis fuel operation big data system 151 .

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

[0089] The water electrolysis hydrogen production system 13 deploys a wastewater purification coupled electrolysis hydrogen production system 16 . Figure 2 This is a schematic diagram of the structure of a wastewater purification coupled electrolysis hydrogen production system according to an embodiment of the present utility model. Figure 1-Figure 2 As shown, the wastewater purification-coupled electrolysis hydrogen production system 16 uses the green electricity provided by the green electricity transmission network to electrocatalytically oxidize wastewater and electrolyze water to produce hydrogen. The wastewater purification-coupled electrolysis hydrogen production system 16 specifically includes: a first water preparation device for electrolysis 161, a first electrolysis hydrogen production device 162, a second water preparation device for electrolysis 163, and a second electrolysis hydrogen production device 164.

[0090] The input end of the first water preparation device 161 is connected to the water inlet point in the corresponding wastewater treatment plant 121 and the output end is connected to the first electrolysis hydrogen production device 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 electrolytic hydrogen production device 162 is used to perform electrocatalytic oxidation coupled hydrogen production on the first water to be electrolyzed, and output electrocatalytically oxidized purified wastewater.

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

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

[0094] The electrocatalytic oxidation coupled hydrogen production method involves the first electrolytic hydrogen production device 162 utilizing the oxidation action of the anode (typically a titanium-based metal oxide-coated electrode) and / or the electric field to generate free radicals, promoting the oxidative decomposition of pollutants, thereby achieving wastewater treatment. Simultaneously, the first electrolytic hydrogen production device 162 utilizes the cathode to generate and recycle hydrogen. The first electrolytic hydrogen production device 162 has low water quality requirements for the first water to be electrolyzed; generally, it only requires the removal of suspended solids and oil.

[0095] The alkaline water electrolysis and PEM water electrolysis hydrogen production are both conventional water electrolysis hydrogen production technologies. In the brine electrolysis hydrogen production, the second water to be electrolyzed entering the second electrolysis hydrogen production device 164 is brine, rather than the alkaline water required for alkaline water electrolysis hydrogen production or the pure water required for PEM water electrolysis hydrogen production.

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

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

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

[0099] In an optional embodiment, the first electrolysis hydrogen production 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 the first electrocatalytic oxidation coupled hydrogen production on the first water to be electrolyzed and output the 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.

[0101] The second electrocatalytic oxidation coupled hydrogen production device 162b 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.

[0102] The second electrocatalytically oxidized purified wastewater is the electrocatalytically oxidized purified wastewater output from the first electrolytic hydrogen production device.

[0103] Furthermore, the first electrolytic hydrogen production device may also include: a first electrocatalytically oxidized purified wastewater adjustment device 162c, the input end of the first electrocatalytically oxidized purified wastewater adjustment device 162c 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.

[0104] The first electrolysis hydrogen production device is divided into a first electrocatalytic oxidation coupled hydrogen production device 162a and a second electrocatalytic oxidation coupled hydrogen production device 162b, so that different types of pollutants in the wastewater can be removed step by step, thereby improving the wastewater treatment efficiency.

[0105] The first electrocatalytic oxidation coupled hydrogen production device 162a primarily removes organic matter and ammonia nitrogen from wastewater. These are the primary pollutants in wastewater and require priority removal. Through the electrochemical reaction at the anode of the first electrocatalytic oxidation coupled hydrogen production device 162a, organic matter in the wastewater is oxidized and decomposed, ammonia nitrogen is converted into nitrogen gas, and hydrogen is simultaneously generated at the cathode, achieving coupled pollutant removal and hydrogen production.

[0106] The second electrocatalytic oxidation coupled hydrogen production device 162b is primarily used for desalination. After treatment by the first electrocatalytic oxidation coupled hydrogen production device 162a, the organic matter and ammonia nitrogen in the wastewater are largely removed, with the main remaining pollutants being salts. The electrochemical reaction at the anode of the second electrocatalytic oxidation coupled hydrogen production device 162b removes salt from the wastewater, further improving wastewater treatment quality, while continuing to produce hydrogen at the cathode.

[0107] The first electrocatalytically oxidized and purified wastewater conditioning device 162c is provided to ensure that the influent water quality of the second electrocatalytically oxidized and coupled hydrogen production device 162b meets the required standards. Different electrocatalytically oxidized and coupled hydrogen production devices have different requirements for influent water quality. By using conditioning device 162c to adjust the first electrocatalytically oxidized and purified wastewater as necessary (for example, by adding chloride salts to generate highly oxidizing hypochlorite during electrolysis), the effectiveness of subsequent treatment can be ensured.

[0108] Furthermore, the second electrolysis hydrogen production device 164 includes multiple independent second electrolysis hydrogen production modules 164a, and the second water preparation device 163 includes a water storage device that can provide second water to be electrolyzed to each of the multiple second electrolysis hydrogen production modules 164a.

[0109] When the green electricity production system provides the wastewater purification coupled electrolysis hydrogen production system through the green electricity transmission network with green electricity at a peak stage, the first electrolysis hydrogen production device 162 and each of the multiple second electrolysis hydrogen production modules 164a are all in operation.

[0110] When the green electricity production system provides the wastewater purification coupled electrolysis hydrogen production system through the green electricity transmission network to a trough stage, the first electrolysis hydrogen production device 162 stops operating, and the multiple second electrolysis hydrogen production modules 164a operate in whole or in part according to the green electricity supply situation.

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

[0112] First, by setting up a plurality of independent second electrolytic hydrogen production modules 164a, the number of operating modules can be flexibly adjusted according to the supply of green electricity, thereby avoiding the problem of low operating efficiency of high-power electrolytic hydrogen production equipment during the green electricity trough stage.

[0113] Second, during the peak period of green electricity, the supply of green electricity is sufficient. At this time, all the first electrolytic hydrogen production devices 162 and all the second electrolytic hydrogen production modules 164a are in operation, which can maximize the use of green electricity for hydrogen production and wastewater treatment.

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

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

[0116] In an optional embodiment, the first electrolysis hydrogen production device is a 100kW-class electrolysis hydrogen production device or a MW-class electrolysis hydrogen production device, and the power of each second electrolysis hydrogen production module in the multiple second electrolysis hydrogen production modules is one order of magnitude lower than that of the first electrolysis hydrogen production device and adopts a 10kW-class electrolyzer or a 100kW-class electrolyzer respectively.

[0117] The first electrolysis hydrogen production device adopts a relatively large power (100kW or MW level), which can quickly process a large amount of wastewater and produce hydrogen during the peak period of green electricity, make full use of the surplus power of green electricity, and improve the efficiency of hydrogen production.

[0118] The second electrolytic hydrogen production module uses a lower power (10kW or 100kW) and can flexibly adjust the number of modules in operation according to power supply conditions during periods of low green electricity demand. When green electricity is insufficient, only some modules can be operated, avoiding the low efficiency of high-power devices under low load and reducing energy waste.

[0119] The power of the second electrolysis hydrogen production module is an order of magnitude lower than that of the first electrolysis hydrogen production unit, meaning that the second electrolysis hydrogen production unit contains multiple second electrolysis hydrogen production modules. This design allows for more refined control. For example, when green electricity power is slightly insufficient, one or two second electrolysis hydrogen production modules can be shut down; when green electricity power is severely insufficient, only a minimum number of second electrolysis hydrogen production modules can be kept running. This flexibility helps ensure system continuity and stability despite fluctuations in green electricity power.

[0120] In summary, different electrolyzer classes differ in manufacturing cost, operating efficiency, and maintenance difficulty. 100kW and MW-class electrolyzers typically have lower unit hydrogen production costs than 10kW-class electrolyzers, but 10kW-class electrolyzers offer greater flexibility. Combining the two classes of electrolyzers can achieve a balance between cost-effectiveness and flexibility.

[0121] Generally speaking, 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 (CODcr )≤3500mg / L, five-day biochemical oxygen demand (BOD5)≤200mg / L, ammonia nitrogen≤1000mg / L, suspended solids≤10mg / L.

[0122] Since the functions of the above-mentioned first device for preparing water to be electrolyzed 161, the first electrocatalytically oxidized purified wastewater adjustment device 162c, and the second device for preparing water to be electrolyzed 163 are all to adjust the corresponding incoming water to the water quality required for the subsequent corresponding electrolysis hydrogen production step, 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 electrolysis hydrogen production step.

[0123] For example, when the inlet water requirement of the first electrolytic hydrogen production device or the first electrocatalytic oxidation coupled hydrogen production device is pH 5-9, the chemical oxygen demand (COD cr )≤3500mg / L, five-day biochemical oxygen demand (BOD5)≤200mg / L, ammonia nitrogen≤1000mg / L, suspended solids≤10mg / L, if the water quality of the wastewater after pre-purification treatment in the corresponding wastewater treatment plant 121 is that the suspended solids index does not meet the standard, the first water preparation device to be electrolyzed 161 can adopt a combination of a precision (microfiltration) filter and an intermediate tank.

[0124] Figure 3 for Figure 2 Schematic diagram of the structure of the second device for preparing water to be electrolyzed. Figure 4 for Figure 2 Schematic diagram of the structure of the second water preparation device to be electrolyzed. Figure 3-Figure 4 As shown, the first device for preparing water to be electrolyzed 161 and / or the first device for preparing water to be electrolyzed 163 respectively constitute a movable skid-mounted structure; 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 to 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 through the corresponding water treatment module and then enter the output side water storage device connected to the corresponding water treatment module.

[0125] The first device for preparing water to be electrolyzed 161 and / or the second electrolysis hydrogen production device 163 are designed as a movable skid-mounted structure, and a water treatment module configuration area, a water storage module configuration area and a water pumping module configuration area are set therein. The main purpose is to improve the modularity, flexibility and adaptability of the system, and to facilitate rapid assembly, disassembly and movement according to different application scenarios and needs.

[0126] Specifically, by using a removable skid-mounted structure, the first water preparation device to be electrolyzed 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 system's construction period, reduce the difficulty of on-site construction, and improve construction quality and efficiency. By providing a water treatment module configuration area, a water storage module configuration area, and a water pumping module configuration area within the removable skid-mounted structure, appropriate water treatment modules, water storage devices, and water pumping 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. By connecting the water treatment modules, water storage devices, and water pumping modules in a one-to-one correspondence and arranging them in different areas, orderly water flow and efficient treatment can be achieved. The water pumping module can drive water flow between different water treatment modules and water storage devices, ensuring continuous operation of the system. At the same time, this layout also facilitates the operation, maintenance, and management of the system. Due to the use of a movable skid-mounted structure, when the system needs to be upgraded, modified or repaired, the individual modules can be easily disassembled, replaced or maintained without causing a significant impact on the operation of the entire system. This maintainability and upgradeability can extend the service life of the system and reduce the operating costs of the system. The movable skid-mounted structure also allows the system to be easily moved and redeployed according to actual needs. In short, designing the first water preparation device to be electrolyzed 161 and / or the second electrolysis hydrogen production device 163 as a movable skid-mounted structure and rationally dividing the functional areas can improve the modularity, flexibility and adaptability of the system, facilitate rapid assembly, disassembly and movement, and meet different application requirements.

[0127] Specifically, the second device for preparing water to be electrolyzed 163 includes 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.

[0128] Specifically, such as Figure 3-Figure 4As shown, the cascade 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, the clean 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 clean water outlet of the low-pressure reverse osmosis membrane filtration device 163b 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 163b is connected to the water inlet of the second device for preparing water to be electrolyzed 163.

[0129] Specifically, the low-pressure reverse osmosis membrane filtration device 163b adopts a roll-type 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, such as Figure 3-Figure 4 As shown, each input-side water storage device and each output-side water storage device are designed to be water tanks 163c installed in sequence in the water storage module configuration area.

[0131] In addition, from Figure 3-Figure 4 As can be seen in the figure, the water tank 163c is arranged and installed on one side of the movable skid-mounted structure base; and the water treatment module configuration area is arranged on the opposite side of the water tank 163c.

[0132] Specifically, the water pumping module adopts a water pump 163d. In addition, the water pumping module configuration area is set at the end area of ​​the water treatment module configuration area.

[0133] Figure 5 This is a schematic diagram of a building-level ecosystem integrating energy conversion, wastewater treatment and carbon dioxide reduction in accordance with an embodiment of the present invention, when the building is a swimming pool and the production and living wastewater is swimming pool water. This building-level ecosystem can apply the construction ideas of the above-mentioned eco-city energy conversion, wastewater treatment and carbon dioxide reduction system to the building scene, thereby making the building a small ecosystem. Figure 5 As shown, the building-level ecosystem integrates energy conversion, wastewater treatment and carbon dioxide reduction, including:

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

[0135] A hydrocarbon synthetic fuel production system is used to synthesize fuel by reacting the hydrogen produced by the wastewater purification coupled electrolysis hydrogen production system with carbon dioxide.

[0136] The wastewater purification coupled electrolysis hydrogen production system specifically includes:

[0137] 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 corresponding wastewater diversion point and the output end is connected to the first electrolysis hydrogen production device, and is used to adjust the industrial and domestic wastewater into the first water to be electrolyzed;

[0138] a first electrolytic hydrogen production device, the first electrolytic hydrogen production device being used to perform electrocatalytic oxidation coupled hydrogen production on the first water to be electrolyzed, and outputting electrocatalytically oxidized purified wastewater;

[0139] 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 electrolysis hydrogen production device and the output end is connected to the second electrolysis hydrogen production device, and is used to adjust the electrocatalytically oxidized purified wastewater into second water to be electrolyzed;

[0140] 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.

[0141] In addition, the building-level ecosystem that integrates energy conversion, wastewater treatment and carbon dioxide reduction in the embodiment of the present invention can also include a green electricity production system, which is used to provide green electricity for electrocatalytic oxidation and water electrolysis to produce hydrogen to the wastewater purification coupled electrolysis hydrogen production system.

[0142] Specifically, the green electricity 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] Furthermore, the second electrolysis hydrogen production device includes multiple independent second electrolysis hydrogen production modules, and the second device for preparing water to be electrolyzed includes a water storage device that can provide second water to be electrolyzed to each of the multiple second electrolysis hydrogen production modules.

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

[0145] When the green electricity power provided by the green electricity production system to the wastewater purification coupled electrolysis hydrogen production system is at a peak stage, the first electrolysis hydrogen production device and each of the plurality of second electrolysis hydrogen production modules are all in operation;

[0146] When the green electricity production system provides the wastewater purification coupled electrolysis hydrogen production system with green electricity at a trough stage, the first electrolysis hydrogen production device stops running, and all or part of the multiple second electrolysis hydrogen production modules operate according to the green electricity supply situation.

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

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

[0149] Furthermore, the building-level ecosystem that integrates energy conversion, wastewater treatment and carbon dioxide reduction in the embodiment of the present invention can also include a heating system, which 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 to the indoor heating facilities.

[0150] In the building-level ecosystem integrating energy conversion, wastewater treatment and carbon dioxide reduction in the embodiment of the present invention, the hydrocarbon synthetic fuel production system can specifically adopt a methane / methanol synthesis device.

[0151] In the building-level ecosystem integrating energy conversion, wastewater treatment and carbon dioxide reduction in the embodiment of the present invention, specifically, the second device for preparing water to be electrolyzed includes a cascade reverse osmosis membrane filtration device, a continuous electrolysis desalination device and an ion exchange desalination equipment using a polishing resin arranged in sequence; the cascade 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 clean 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 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.

[0152] The first device for preparing water to be electrolyzed and / or the second device for preparing water to be electrolyzed respectively constitute a movable skid-mounted structure; 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 to 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 through the corresponding water treatment module and then enter the output side water storage device connected to the corresponding water treatment module.

[0153] The wastewater purification coupled electrolysis hydrogen production system in the building-level ecosystem integrating energy conversion, wastewater treatment and carbon dioxide reduction in the embodiment of the utility model is Figure 2 The wastewater purification coupled electrolysis hydrogen production system shown is the same or similar.

[0154] This building-level ecosystem, integrating energy conversion, wastewater treatment, and CO2 reduction, offers the following advantages: First, it achieves self-sufficiency and recycling of internal building energy. The system uses industrial and domestic wastewater within the building to produce hydrogen, which is then combined with CO2 to form a fuel for internal heating and other purposes, reducing reliance on external energy sources and improving energy efficiency.

[0155] Second, it effectively treats wastewater generated within buildings, reducing environmental pollution. The system uses electrocatalytic oxidation and water electrolysis to produce hydrogen, deeply treating both industrial and domestic wastewater generated within buildings. This not only reduces wastewater discharge but also improves water resource utilization efficiency.

[0156] Third, the system comprehensively utilizes green electricity to improve 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. When green electricity is in surplus, large quantities of hydrogen are produced. When green electricity is insufficient, the operation of the hydrogen production module is flexibly adjusted, maximizing the use of renewable energy and improving energy efficiency.

[0157] Fourth, it reduces carbon dioxide and greenhouse gas emissions. The system recycles the oxygen produced during hydrogen electrolysis and combines carbon dioxide with the produced hydrogen to form fuel, achieving carbon recycling and reducing greenhouse gas emissions, which helps achieve the building's carbon dioxide reduction goals.

[0158] Fifth, the system's modular design offers strong flexibility and adaptability. The system utilizes a removable skid-mounted structure and modular design, allowing for flexible configuration and adjustment based on the building's specific needs. It facilitates rapid assembly, disassembly, and movement, adapting to diverse application scenarios.

[0159] Sixth, the integrated design concept enables the synergy and coupling of multiple functions. The system integrates multiple functions such as wastewater treatment, hydrogen production, synthetic fuels, heat supply, and oxygen supply, achieving the synergy and coupling of energy conversion, wastewater treatment, and carbon dioxide reduction, reflecting the integrated and intelligent system design.

[0160] This building-level ecosystem provides new ideas and solutions for building energy management and environmental governance, which is conducive to promoting changes in building energy management models.

[0161] The above describes the relevant contents of the present invention. Based on these descriptions, a person skilled in the art will be able to implement the present invention. Based on the above contents of this specification, all other embodiments obtained by a person skilled in the art without inventive work should fall within the scope of patent protection.

Claims

1. A building-level ecosystem that integrates energy conversion, wastewater treatment and carbon dioxide reduction, characterized by: include: A wastewater purification coupled electrolysis hydrogen production system, wherein the wastewater purification coupled electrolysis hydrogen production system uses green electricity to electrocatalytically oxidize production and domestic wastewater inside buildings and electrolyze water to produce hydrogen; A hydrocarbon synthetic fuel production system, wherein the hydrocarbon synthetic fuel production system is used to react the hydrogen produced by the wastewater purification coupled electrolysis hydrogen production system with carbon dioxide to synthesize fuel; The wastewater purification coupled electrolysis hydrogen production system specifically includes: 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 corresponding wastewater diversion point and the output end is connected to the first electrolysis hydrogen production device, and is used to adjust the production and living wastewater 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 building-level ecosystem integrating energy conversion, wastewater treatment and carbon dioxide reduction as claimed in claim 1, characterized in that: It also includes a green electricity production system, which is used to provide green electricity for electrocatalytic oxidation and water electrolysis to produce hydrogen to the wastewater purification coupled electrolysis hydrogen production system.

3. The building-level ecosystem integrating energy conversion, wastewater treatment and carbon dioxide reduction as claimed in claim 2, characterized in that: The green electricity production system includes a photovoltaic power generation device.

4. The building-level ecosystem integrating energy conversion, wastewater treatment and carbon dioxide reduction as claimed in claim 3, characterized in that: The photovoltaic power generation device includes a roof photovoltaic module and / or a thin-film photovoltaic module.

5. The building-level ecosystem integrating energy conversion, wastewater treatment and carbon dioxide reduction as claimed in claim 2, characterized in that: The second electrolytic hydrogen production device comprises a plurality of independent second electrolytic hydrogen production modules, and the second device for preparing water to be electrolyzed comprises a water storage device capable of providing second water to be electrolyzed to each of the plurality of second electrolytic hydrogen production modules; The first hydrogen production by electrolysis device and each of the plurality of second hydrogen production by electrolysis modules can be independently controlled so that: When the green electricity power provided by the green electricity production system to the wastewater purification coupled electrolysis hydrogen production system is at a peak stage, the first electrolysis hydrogen production device and each of the plurality of second electrolysis hydrogen production modules are all in operation; When the green electricity production system provides the wastewater purification coupled electrolysis hydrogen production system with green electricity at a trough stage, the first electrolysis hydrogen production device stops running, and the multiple second electrolysis hydrogen production modules operate in whole or in part according to the green electricity supply situation.

6. The building-level ecosystem integrating energy conversion, wastewater treatment and carbon dioxide reduction as claimed in claim 1, characterized in that: It also includes an oxygen supply system, which is used to recover and store the oxygen generated by the wastewater purification coupled electrolysis hydrogen production system and provide it for use inside the building.

7. The building-level ecosystem integrating energy conversion, wastewater treatment and carbon dioxide reduction as claimed in claim 1, characterized in that: The building is a swimming pool building, and the production and living wastewater is swimming pool water.

8. The building-level ecosystem integrating energy conversion, wastewater treatment and carbon dioxide reduction as claimed in claim 1, characterized in that: It also includes a heating system, which includes a boiler and an indoor heating facility connected to the boiler. The boiler generates heat by burning the fuel and provides heat to the indoor heating facility.

9. The building-level ecosystem integrating energy conversion, wastewater treatment and carbon dioxide reduction as claimed in claim 1, characterized in that: The hydrocarbon synthetic fuel production system adopts a methane / methanol synthesis device.

10. The building-level ecosystem integrating energy conversion, wastewater treatment and carbon dioxide reduction as claimed in claim 1, characterized in that: The second device for preparing water to be electrolyzed comprises a cascade reverse osmosis membrane filtration device, a continuous electrolytic desalination device, and an ion exchange desalination device using a polishing resin, which are sequentially arranged in front and behind; 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, which are sequentially arranged in front and behind, the clean 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 clean water outlet of the low-pressure reverse osmosis membrane filtration device is connected to the water inlet of the continuous electrolytic 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; And / or, the first device for preparing water to be electrolyzed and / or the second device for preparing water to be electrolyzed respectively constitute a movable skid-mounted structure; 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, and 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.

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