Comprehensive energy zero-carbon system for urban sewage treatment plant

Abstract

The invention discloses a comprehensive energy zero-carbon system for an urban sewage treatment plant, which constructs a novel power supply mode taking renewable energy as a main source and a power grid as an auxiliary source by arranging photovoltaic power generation equipment, wind power generation equipment and other renewable energy power generation equipment and combining with the power grid, so that the energy dependence on the power grid can be reduced, and the power consumption of the sewage treatment plant is reduced; meanwhile, reclaimed water treated by a sewage plant is used as a heat source, low-temperature waste heat is fully utilized, the heat source is provided for sludge low-temperature drying, meanwhile, cooling is provided for plant area buildings in summer, heating is provided for the plant area buildings in winter, on the basis, energy consumption can be further reduced, effective carbon reduction of production of the sewage plant is achieved, and therefore the system and the method are quite suitable for large-scale application and popularization.

Description

Technical Field

[0001] The present invention belongs to the technical field of integrated energy, and in particular relates to an integrated energy zero-carbon system for a municipal sewage treatment plant. Background Art

[0002] There are many industrial parks in my country, which are widely distributed. They are not only the engine of economic development, but also one of the main sources of carbon emissions. High-energy-consuming industries and regions need to change their development concepts, reduce their dependence on fossil energy and high-carbon development paths, and reasonably control the total energy consumption to promote the development of industrial parks towards zero-carbon. At present, industrial parks, especially sewage treatment plants, usually rely on power grids for energy supply, resulting in excessive electricity consumption, increased energy consumption and carbon emissions. Therefore, how to provide a comprehensive energy zero-carbon system for urban sewage treatment plants to reduce the electricity consumption of sewage treatment plants has become an urgent problem to be solved. Summary of the invention

[0003] The purpose of the present invention is to provide a comprehensive energy zero-carbon system for urban sewage treatment plants, so as to solve the problem of excessive reliance on the power grid for energy supply in the prior art, thus leading to excessive energy consumption.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] In a first aspect, a comprehensive energy zero-carbon system for a municipal sewage treatment plant is provided, comprising:

[0006] New energy power supply equipment, wherein the new energy power supply equipment includes distributed photovoltaic power generation equipment and distributed wind power generation equipment, and the power grid of the sewage treatment plant, the transmission ends of the distributed photovoltaic power generation equipment and the distributed wind power generation equipment are all electrically connected to the charging end of the energy storage power station in the sewage treatment plant;

[0007] Electrical equipment used in sewage treatment plants, wherein the electrical equipment used in sewage treatment plants includes hydrogen production equipment, hydrogenation equipment, charging equipment in a photovoltaic storage and charging integrated parking lot, sewage source heat pump equipment and target equipment, and the target equipment is the electrical equipment in the sewage treatment plant excluding the energy storage power station, hydrogen production equipment, hydrogenation equipment, charging equipment and sewage source heat pump equipment;

[0008] The transmission ends of the power grid, the energy storage power station, the distributed photovoltaic power generation equipment and the distributed wind power generation equipment are also electrically connected to the power supply ends of the electrical equipment of the sewage treatment plant, wherein the new energy power supply equipment serves as the main power supply of the sewage treatment plant, and the power grid and the energy storage power station serve as auxiliary power supplies of the sewage treatment plant;

[0009] The sewage source heat pump equipment is connected to a grey water recovery device, and the grey water output by the grey water recovery device is used as a heat source. The sewage source heat pump equipment serves as the heating end and cooling end of the buildings in the sewage treatment plant, providing a heating source and a cooling source for the buildings in the sewage treatment plant.

[0010] Based on the above disclosed content, the comprehensive energy zero-carbon system provided by the present invention is additionally provided with new energy power supply equipment such as distributed photovoltaic power generation equipment and distributed wind power generation equipment on the basis of traditional power grid power supply, wherein the aforementioned power grid and new energy power supply equipment are connected to the charging end of the energy storage power station in the sewage treatment plant, so as to realize the charging of the energy storage power station, and at the same time, the transmission end of the aforementioned power grid, new energy power supply equipment and energy storage power station is also electrically connected to the power supply end of the electrical equipment of the sewage treatment plant, and the new energy power supply equipment serves as the main power supply of the sewage treatment plant, and the power grid and energy storage power station serve as auxiliary power supplies of the sewage treatment plant; in this way, a new power supply mode with renewable energy as the main source and the power grid as the auxiliary source can be constituted, thereby reducing the energy dependence on the power grid; in addition, the sewage source heat pump equipment in the sewage treatment plant uses the reclaimed water in the sewage treatment plant as a heat source to work, and provides cold and heat sources for the buildings in the plant; thus, the waste heat recovery technology can be used to meet the cold and heat load requirements in the plant, thereby reducing the carbon emissions of the plant.

[0011] Through the above design, the present invention sets up photovoltaic, wind and other renewable energy power generation equipment, and combines with the power grid to construct a new power supply mode with renewable energy as the main source and the power grid as the auxiliary source. In this way, the energy dependence on the power grid can be reduced, thereby reducing the electricity consumption of the sewage treatment plant; at the same time, the treated reclaimed water from the sewage treatment plant is used as a heat source, and the low-temperature waste heat is fully utilized to provide a heat source for the low-temperature drying of the sludge, and at the same time, the factory buildings are cooled in summer and heated in winter. Based on this, energy consumption can be further reduced, thereby achieving effective carbon reduction in the production of the sewage treatment plant. Therefore, the present invention is very suitable for large-scale application and promotion.

[0012] In one possible design, the energy storage power station includes: a battery stack, an electrolyte storage tank, an electrolyte circulation pump, a battery management system, an energy storage inverter and an energy management system; wherein the battery stack is connected to the electrolyte storage tank through the electrolyte circulation pump, the power grid is electrically connected to the input end of the energy storage inverter through an AC circuit breaker, the output end of the energy storage inverter is electrically connected to the battery stack, the battery management system is electrically connected to the controlled end of the battery stack, and the energy management system is electrically connected to the controlled end of the battery management system.

[0013] In a possible design, the hydrogen production equipment includes: an electrolyzer, a gas-liquid processor, a hydrogen drying and purifying device, a hydrogen storage bottle group, a rectifier cabinet and a rectifier transformer;

[0014] The output end of the power transmission and distribution line of the sewage treatment plant is connected to the power supply end of the electrolyzer through the rectifier transformer and the rectifier cabinet in sequence, and the input end of the power transmission and distribution line is electrically connected to the power transmission end of the new energy power supply equipment, the power transmission end of the energy storage power station and the power grid;

[0015] The air duct of the electrolyzer is connected to the gas-liquid processor, and the gas-liquid processor performs gas-liquid separation on the hydrogen and oxygen output by the air duct of the electrolyzer, wherein the hydrogen output end of the gas-liquid processor is connected to the air inlet of the hydrogen drying purifier, the air outlet of the hydrogen drying purifier is connected to the hydrogen storage bottle group through a hydrogen film regulating valve, and the oxygen output end of the gas-liquid processor is connected to the oxygen supply end of the sewage treatment equipment in the sewage plant.

[0016] In one possible design, the sewage source heat pump device includes: an indirect water source heat pump device or a direct water source heat pump device;

[0017] The indirect water source heat pump device includes: a screw sewage source heat pump heating unit, a screw sewage source heat pump cold / hot switching unit, cold and hot equipment, an intermediate heat exchanger, a grey water buffer tank, a sludge drying equipment, a switching valve, a sludge drying heating circulation pump, a user side circulation pump, an intermediate water circulation pump and a grey water circulation pump;

[0018] The inlet of the grey water buffer tank is connected to the output port of the grey water recovery device, wherein the outlet of the grey water buffer tank is connected to the input port of the intermediate heat exchanger through the grey water circulation pump, the first output port of the intermediate heat exchanger is connected to the first port of the screw sewage source heat pump heating unit, the second port of the screw sewage source heat pump heating unit is connected to the inlet of the sludge drying equipment through the sludge drying heating circulation pump, the outlet of the sludge drying equipment is connected to the third port of the screw sewage source heat pump heating unit, and the fourth port of the screw sewage source heat pump heating unit is connected to the first receiving port of the intermediate heat exchanger;

[0019] The second output port of the intermediate heat exchanger is connected to the first port of the screw sewage source heat pump cold / hot switching unit, and the second port of the screw sewage source heat pump cold / hot switching unit is connected to the inlet of the cold and hot equipment through the user-side circulation pump, wherein the outlet of the cold and hot equipment is connected to the third port of the screw sewage source heat pump cold / hot switching unit, and the fourth port of the screw sewage source heat pump cold / hot switching unit is connected to the second receiving port of the intermediate heat exchanger;

[0020] The intermediate water circulation pump is arranged between the first output port of the intermediate heat exchanger and the first port of the screw-type sewage source heat pump heating unit, wherein the intermediate water circulation pump and two switching valves are arranged in sequence between the second output port of the intermediate heat exchanger and the first port of the screw-type sewage source heat pump cold / hot switching unit, and the switching valve is also arranged between the second port of the screw-type sewage source heat pump cold / hot switching unit and the user-side circulation pump.

[0021] In one possible design, the direct water source heat pump device includes: a screw sewage source heat pump heating unit, a screw sewage source heat pump cold / hot switching unit, cold and hot equipment, a grey water buffer tank, a sludge drying equipment, a switching valve, a sludge drying heating circulation pump, a user side circulation pump and a grey water circulation pump;

[0022] The reclaimed water buffer tank is connected to the first port of the screw sewage source heat pump heating unit through the reclaimed water circulation pump, the second port of the screw sewage source heat pump heating unit is connected to the inlet of the sludge drying equipment through the sludge drying heating circulation pump, and the outlet of the sludge drying equipment is connected to the third port of the screw sewage source heat pump heating unit;

[0023] The reclaimed water buffer tank is also connected to the first port of the screw sewage source heat pump cold / hot switching unit through the reclaimed water circulation pump, the second port of the screw sewage source heat pump cold / hot switching unit is connected to the inlet of the cold and hot equipment through the user-side circulation pump, and the outlet of the cold and hot equipment is connected to the third port of the screw sewage source heat pump cold / hot switching unit;

[0024] Among them, two switching valves are arranged in the pipeline between the grey water circulation pump and the first port of the screw-type sewage source heat pump cold / hot switching unit, and the switching valve is also arranged on the pipeline between the outlet of the cold and hot equipment and the third port of the screw-type sewage source heat pump cold / hot switching unit.

[0025] In a possible design, it also includes: a wind-solar complementary street lamp, wherein the wind-solar complementary street lamp includes a wind turbine, a solar photovoltaic cell group, a battery and an inverter, wherein the wind turbine and the solar photovoltaic cell group are installed on the street lamp body, the wind turbine and the solar photovoltaic cell group are electrically connected to the battery, the battery is electrically connected to the power supply end of the street lamp body through the inverter, and the power grid is electrically connected to the power supply end of the street lamp body.

[0026] In a possible design, it also includes: an energy total management device, wherein the energy total management device is used to obtain the total power generation of the new energy power supply equipment and the total power load of the sewage treatment plant;

[0027] The total energy management device is used to determine the power supply strategy of the sewage treatment plant according to the total power generation and the total power load, and control the power supply of the new energy power supply equipment, the energy storage power station and the power grid according to the power supply strategy.

[0028] In a possible design, the energy total management device is used to determine whether the total power generation is greater than or equal to the total power load;

[0029] The energy total management device is used to generate a first strategy when it is determined that the total power generation is greater than or equal to the total power load, and perform power supply control of the sewage treatment plant according to the first strategy, wherein the first strategy is that the energy total management device controls the distributed photovoltaic power generation equipment and distributed wind power generation equipment in the new energy power supply equipment to be incorporated into the power transmission and distribution lines of the sewage treatment plant, to supply power to the hydrogen production equipment, hydrogenation equipment, sewage source heat pump equipment and target equipment, and to charge the energy storage power station;

[0030] The energy total management device is used to determine whether the power consumption period of the power grid is in a valley power period when it is determined that the total power generation is less than the total power load;

[0031] The energy management device is used to generate a second strategy when it is determined that the power consumption period of the power grid is in the off-peak period, so as to control the power supply of the sewage treatment plant according to the second strategy, wherein the second strategy is that the energy management device controls the distributed photovoltaic power generation equipment and the distributed wind power generation equipment to be incorporated into the power transmission and distribution lines of the sewage treatment plant to supply power to the hydrogen production equipment, the hydrogenation equipment, the sewage source heat pump equipment and the target equipment, and controls the power grid to supply power to the energy storage power station.

[0032] In a possible design, the energy management device is used to determine whether the sum of the storage amount of the energy storage power station and the total power generation meets the total power load when it is determined that the power consumption period of the power grid is not in the off-peak period, and generate a third strategy when it is determined that the sum of the storage amount of the energy storage power station and the total power generation meets the total power load, so as to control the power supply of the sewage treatment plant according to the third strategy;

[0033] Among them, the third strategy is: the energy management device controls the distributed photovoltaic power generation equipment, distributed wind power generation equipment and energy storage power station to be integrated into the transmission and distribution lines of the sewage treatment plant to supply power to the electrical equipment of the sewage treatment plant.

[0034] In a possible design, the total power load includes an unadjustable load and an adjustable load, wherein the unadjustable load includes the power load generated when the target device and the sewage source heat pump device are in operation, and the adjustable load is the power load generated when the hydrogen production device, the hydrogenation device and the charging device in the photovoltaic storage and charging integrated parking lot are in operation;

[0035] The energy total management device is used to determine whether the sum of the storage capacity of the energy storage power station and the total power generation meets the non-adjustable load when it is determined that the sum of the storage capacity of the energy storage power station and the total power generation does not meet the total power load;

[0036] The total energy management device is used to generate a fourth strategy when it is determined that the sum of the storage capacity of the energy storage power station and the total power generation does not meet the non-adjustable load, and perform power supply control of the sewage treatment plant according to the fourth strategy, wherein the fourth strategy is to incorporate the distributed photovoltaic power generation equipment, the distributed wind power generation equipment and the power grid into the power transmission and distribution lines of the sewage treatment plant, and stop supplying power to the hydrogen production equipment, the hydrogenation equipment and the charging equipment in the integrated light storage and charging parking lot;

[0037] The energy management device is further configured to generate a fifth strategy when it is determined that the sum of the storage capacity of the energy storage power station and the total power generation capacity meets the non-adjustable load, and perform power supply control of the sewage treatment plant according to the fifth strategy;

[0038] Among them, the fifth strategy is: to integrate the distributed photovoltaic power generation equipment, the distributed wind power generation equipment and the energy storage power station into the transmission and distribution lines of the sewage treatment plant, and to reduce the operating power of the hydrogen production equipment, hydrogenation equipment and the charging equipment in the integrated photovoltaic storage and charging parking lot.

[0039] Beneficial effects:

[0040] The present invention sets up photovoltaic, wind and other renewable energy power generation equipment, and combines them with the power grid to construct a new power supply mode with renewable energy as the main source and the power grid as the auxiliary source. In this way, the energy dependence on the power grid can be reduced, thereby reducing the electricity consumption of the sewage treatment plant; at the same time, the treated reclaimed water from the sewage treatment plant is used as a heat source, and the low-temperature waste heat is fully utilized to provide a heat source for the low-temperature drying of the sludge, and at the same time, the factory buildings are cooled in summer and heated in winter. Based on this, the energy consumption can be further reduced, thereby achieving effective carbon reduction in the sewage treatment plant production. Therefore, the present invention is very suitable for large-scale application and promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A schematic diagram of the architecture of a comprehensive energy zero-carbon system for a municipal sewage treatment plant provided by an embodiment of the present invention;

[0042] Figure 2 A schematic structural diagram of an indirect water source heat pump device provided in an embodiment of the present invention;

[0043] Figure 3 A schematic structural diagram of a direct water source heat pump device provided in an embodiment of the present invention;

[0044] Figure 4 A power control flow chart provided for an embodiment of the present invention.

[0045] Reference numerals:

[0046] 1-Distributed photovoltaic power generation equipment; 2-Distributed wind power generation equipment; 3-Energy storage power station; 4-Hydrogen production equipment; 5-Hydrogen refueling equipment; 6-Integrated parking lot for light storage and charging; 7-Wind-solar complementary street lights; 8-Sewage source heat pump equipment; 14-Power grid; 15-Recycled water recovery device; 81-Screw sewage source heat pump heating unit; 82-Screw sewage source heat pump cold / hot switching unit; 83-Cold and hot equipment; 84-Intermediate heat exchanger; 85-Recycled water buffer tank; 86-Sludge drying equipment; 87-Switch valve; 88-Sludge drying heating circulation pump; 89-User side circulation pump; 810-Intermediate water circulation pump; 811-Recycled water circulation pump; 9-Electric load; 11-Cold load; 10-Heat load; 16-Total energy management equipment. DETAILED DESCRIPTION

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0048] It should be understood that although the terms first, second, etc. may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another unit. For example, a first unit can be referred to as a second unit, and similarly, a second unit can be referred to as a first unit without departing from the scope of the exemplary embodiments of the present invention.

[0049] It should be understood that the term "and / or" that may appear in this article is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" that may appear in this article describes another type of association object relationship, indicating that two relationships may exist. For example, A / and B can represent two situations: A exists alone, and A and B exist alone. In addition, the character " / " that may appear in this article generally indicates that the previous and next associated objects are in an "or" relationship.

[0050] Example:

[0051] See also Figure 1 As shown, the comprehensive energy zero-carbon system for urban sewage treatment plants provided in this embodiment may include, but is not limited to: new energy power supply equipment, electrical equipment for sewage treatment plants, energy storage power stations 3, sewage source heat pump equipment 8 and grey water recovery devices 15; wherein, the new energy power supply equipment is used to supply the main power to the sewage treatment plant, and combined with the power grid 14, it can complete the continuous power supply to the sewage treatment plant; the energy storage power station 3 completes the storage of electric energy and can provide an external discharge function, so that it can assist the new energy power supply equipment and the power grid 14 in supplying power to the sewage treatment plant, and the sewage source heat pump equipment 8 is used as a sludge drying equipment to carry out sludge treatment; finally, the grey water recovery device 15 plays the role of grey water recovery in sewage treatment and provides a heat source for the sewage source heat pump equipment 8.

[0052] Optionally, the detailed composition and structure of each of the aforementioned devices are disclosed below:

[0053] In specific applications, the new energy power supply equipment may include, but is not limited to: distributed photovoltaic power generation equipment 1 and distributed wind power generation equipment 2, wherein the power grid 14 of the sewage treatment plant, the transmission ends of the distributed photovoltaic power generation equipment 1 and the distributed wind power generation equipment 2 are all electrically connected to the charging end of the energy storage power station 3 in the sewage treatment plant to realize the charging of the energy storage power station 3.

[0054] At the same time, the electrical equipment of the sewage treatment plant mentioned in the example may include but is not limited to: hydrogen production equipment 4, hydrogenation equipment 5, charging equipment in the integrated photovoltaic storage and charging parking lot 6, sewage source heat pump equipment 8 and target equipment, and the target equipment is the electrical equipment in the sewage treatment plant except the energy storage power station 3, hydrogen production equipment 4, hydrogenation equipment 5, charging equipment and sewage source heat pump equipment 8, such as various office equipment, lighting equipment, etc.; in this way, it is equivalent to using new energy power supply equipment in combination with the power grid and the energy storage power station 3 to realize the power supply of the aforementioned sewage treatment plant electrical equipment.

[0055] Specifically, the transmission ends of the power grid 14, the energy storage power station 3, the distributed photovoltaic power generation equipment 1 and the distributed wind power generation equipment 2 are also electrically connected to the power supply ends of the electrical equipment of the sewage treatment plant. Specifically, they are incorporated into the transmission and distribution lines of the sewage treatment plant to connect the power supply ends of the electrical equipment of the sewage treatment plant, thereby completing the power supply of the aforementioned equipment; further, in this embodiment, the new energy power supply equipment is used as the main power supply of the sewage treatment plant, and the power grid 14 and the energy storage power station 3 are used as auxiliary power supplies of the sewage treatment plant; in this way, a new power supply mode based on "renewable energy as the main and the power grid as the auxiliary" can be formed. Based on this, the sewage treatment plant's dependence on the power grid can be reduced, thereby reducing the power consumption of the power grid and achieving the purpose of reducing energy consumption.

[0056] In specific applications, this embodiment further configures the sewage source heat pump equipment 8 to be connected to a grey water recovery device 15, so that the grey water output by the grey water recovery device 15 is used as a heat source, that is, when the sewage source heat pump equipment 8 performs a sludge drying process, a large amount of thermal energy is required, which is usually provided by a coal-fired or oil-fired boiler in the traditional way, and requires a large amount of fuel, while this embodiment utilizes the heat in the grey water to recover the low-grade heat therein and convert it into energy to meet various needs of the plant; in this way, the dependence on fossil fuels can be effectively reduced, thereby achieving energy conservation and emission reduction.

[0057] Furthermore, the present embodiment also uses the sewage source heat pump equipment 8 as the heating end and cooling end of the buildings in the sewage treatment plant, thereby providing a heating source and a cooling source for the buildings in the sewage treatment plant, that is, providing hot water and chilled water for the sewage treatment plant area, and supplying them to various hot and cold equipment by laying underground pipes in the plant area; in this way, heating can be provided for the plant buildings in winter, reducing dependence on traditional heating methods and reducing carbon emissions; similarly, in summer, it switches to cooling mode to provide cold air for the plant buildings to meet the cooling needs.

[0058] Therefore, through the above explanation, the comprehensive energy zero-carbon system of the urban sewage treatment plant provided in this embodiment has constructed a new power supply mode based on "renewable energy as the main and grid electricity as the auxiliary", and uses waste heat recovery technology to meet the cold and heat load requirements in the plant. Therefore, it can reduce the electricity consumption of the sewage treatment plant, thereby achieving effective carbon reduction in the production of the sewage treatment plant.

[0059] In a possible design, the following provides detailed structures of each device in the aforementioned integrated energy zero-carbon system:

[0060] First, the distributed photovoltaic power generation equipment 1 may include but is not limited to: photovoltaic modules and string inverters; specifically, the photovoltaic modules are installed on the roof surface of the sewage treatment plant and the surface of the sewage treatment tank, and the photovoltaic modules are electrically connected to the string inverter, which is connected to the transmission and distribution lines of the sewage treatment plant through the string inverter, so as to supply power to the electrical equipment of the sewage treatment plant; at the same time, the photovoltaic modules include photovoltaic N-type double-sided double-glass modules, of course, other photovoltaic modules can also be used, and are not limited to the aforementioned examples.

[0061] Similarly, the example distributed wind power generation equipment 2 includes: micro wind turbines and necessary electrical equipment, such as inverters, etc.; wherein the micro wind turbines are arranged in idle land, green land, etc. in the factory area, and are connected to the transmission and distribution lines of the sewage treatment plant through inverters, thereby ensuring the power supply to the sewage treatment plant; at the same time, the aforementioned distributed photovoltaic power generation equipment and distributed wind power generation equipment adopt the operation mode of "self-generation for self-use, and surplus power to the grid"; of course, the aforementioned operation mode is explained below.

[0062] Next, the detailed structure of the energy storage power station 3 is disclosed as follows:

[0063] In this embodiment, the energy storage power station 3 is taken as an all-vanadium liquid flow battery energy storage system, which mainly includes a battery energy storage unit and an electrical control system, wherein the battery energy storage unit mainly includes: a battery stack, an electrolyte storage tank, an electrolyte circulation pump, a battery management system BMS, an energy storage inverter PCS and an energy management system EMS; specifically, the battery stack is connected to the electrolyte storage tank through an electrolyte circulation pump, the power grid is electrically connected to the input end of the energy storage inverter PCS through an AC circuit breaker, the output end of the energy storage inverter PCS is electrically connected to the battery stack, the battery management system BMS is electrically connected to the controlled end of the battery stack, and the energy management system EMS is electrically connected to the controlled end of the battery management system.

[0064] Based on this, the city power output by the power grid 14 is protected by lightning through the AC circuit breaker, and then flows through the AC / DC modules in the PCS. The AC power is converted by the AC / DC module to output a DC voltage, which is connected to the battery stack through the DC circuit breaker to realize charging of the battery stack. During discharge, the DC power output by the battery stack is converted into AC power by the AC / DC module and then incorporated into the power grid 14.

[0065] At the same time, each energy storage unit is divided into a liquid storage tank area, a battery stack area and a functional equipment area according to the spatial layout; among them, the functional equipment area is arranged with various auxiliary equipment for the energy storage unit, such as distribution boxes, signal acquisition modules, BMS, circulation pumps and other equipment; the liquid storage tank area is arranged with positive and negative electrode storage tanks (with covers), and the capillary bundles of the heat exchanger are arranged in the liquid storage tank; the battery stack area is arranged with the battery stack group and the pipeline transportation system; and the electrical control system includes a PCS cabinet and an energy storage system control cabinet, and the PCS cabinet is arranged with AC / DC modules and a network management machine. In this way, the energy storage system can improve the power consumption of the comprehensive energy system and enhance the stability of power supply.

[0066] Further, the structure of the hydrogen production equipment 4 is disclosed as follows:

[0067] In specific applications, the hydrogen production equipment 4 may include, but is not limited to: an electrolyzer, a gas-liquid processor, a hydrogen drying purifier, a hydrogen storage bottle group, a rectifier cabinet and a rectifier transformer, and a control cabinet; wherein the output end of the transmission and distribution line of the sewage treatment plant is electrically connected to the power supply end of the electrolyzer through the rectifier transformer and the rectifier cabinet in turn, and the input end of the transmission and distribution line is electrically connected to the transmission end of the new energy power supply equipment, the transmission end of the energy storage power station 3 and the power grid 14; in this way, the hydrogen production equipment is powered by wind and solar power generation and the power grid 14, thereby decomposing the electrolyte into hydrogen and oxygen.

[0068] At the same time, the air duct of the electrolyzer is connected to the gas-liquid processor, and the gas-liquid processor performs gas-liquid separation on the hydrogen and oxygen output by the air duct of the electrolyzer, wherein the hydrogen output end of the gas-liquid processor is connected to the air inlet of the hydrogen drying purifier, and the air outlet of the hydrogen drying purifier is connected to the hydrogen storage bottle group through a hydrogen film regulating valve (i.e., the hydrogen drying purifier is used for drying and purification), and the oxygen output end of the gas-liquid processor is connected to the oxygen supply end of the sewage treatment equipment in the sewage treatment plant; in this way, new energy power generation and power grid can be used to produce hydrogen and oxygen, wherein hydrogen can be stored to provide a hydrogen source for the surrounding areas, and oxygen replaces part of the air and is directly supplied to the aerobic process of the sewage treatment plant, thereby improving the sewage treatment efficiency and saving energy.

[0069] Furthermore, the example hydrogen production equipment 4 also includes: a connecting pipe, an alkali liquid filter, a recovery circulation pump, a water adding pump, a water tank and an alkali tank; wherein the liquid discharge outlet of the gas-liquid processor is connected to the inlet of the alkali liquid filter through the connecting pipe, the outlet of the alkali liquid filter is connected to the input end of the recovery circulation pump, and the output end of the recovery circulation pump is connected to the electrolytic cell; in this way, the electrolyte can be recovered, thereby forming a closed-loop system.

[0070] Optionally, in the present embodiment, alkali liquid is stored in the alkali tank, the water tank and the input port of the alkali tank are connected to a deionized water tank, the output port of the alkali tank is connected to the electrolyzer, and the output port of the water tank is connected to the scrubber in the gas-liquid processor via the water adding pump; based on this, deionized water and the alkali liquid in the alkali tank are mixed to form electrolyzed water, which is then transported to the electrolyzer as an electrolysis raw material; at the same time, deionized water is transported to the scrubber in the gas-liquid processor by the water adding pump, thereby completing hydrogen and oxygen washing; of course, the aforementioned control cabinet is responsible for the equipment operation control of the entire hydrogen production equipment 4, that is, electrically connecting the controlled ends of various instruments in the hydrogen production equipment such as the hydrogen drying purifier, the recovery circulation pump, and the water adding pump to complete the operation control of the instruments.

[0071] Thus, the main working process of the aforementioned hydrogen production equipment is as follows: hydrogen is produced by using wind and solar power generation and valley electricity from the power grid 14, with a power adjustable range of 30%-110%. The produced hydrogen is supplied to the surrounding areas, and oxygen is transported through oxygen pipelines and fans to be supplied to the aerobic process of the sewage treatment plant; specifically, the alternating current from the 10kV power transmission and distribution system of the plant is output through a rectifier transformer and a rectifier cabinet to output direct current matching the rated voltage of the electrolyzer, and the water in the electrolyte is electrolyzed into hydrogen and oxygen in the electrolyzer, and the hydrogen coming out of the electrolyzer is introduced into the hydrogen liquid processor for gas-liquid separation, After washing, it enters the hydrogen drying purifier, and after drying and purification, it is discharged through the hydrogen membrane regulating valve and enters the hydrogen storage bottle group; after gas-liquid separation and washing, the oxygen directly enters the oxygen pipeline and is transported to the aerobic process area of ​​the sewage treatment plant; then, the electrolyte in the hydrogen and oxygen separators is collected through the connecting pipe, and after the mechanical impurities are removed by the alkali liquid filter, it is pumped into the electrolytic cell by the recovery circulation pump to form a closed-loop system; at the same time, the external deionized water enters the water tank and the alkali tank respectively, and the deionized water in the water tank is injected into the hydrogen and oxygen scrubber part of the gas-liquid processor through the water adding pump for hydrogen and oxygen separation.

[0072] In addition, in this embodiment, a flame arrester is also provided, wherein, for example, the flame arrester is provided in the equipment discharge pipe of the hydrogen system to prevent backfire, stop the flame from spreading, and ensure the safe production and normal gas supply of the hydrogen and oxygen station and its storage and transportation system.

[0073] After completing the description of the hydrogen production equipment 4, the structure of the hydrogenation equipment 5 is provided below:

[0074] In this embodiment, the example hydrogenation equipment 5 may include but is not limited to: a charging and unloading column, a hydrogen compressor, a hydrogenator, a chiller, a hydrogen storage bottle group, a hydrogen storage valve group, a sequential control valve group, an instrument air storage tank, a nitrogen storage tank, a purge bus, a control system, a charging, a supervision system and a safety monitoring system, etc., wherein the hydrogen is pressurized to 20MPa from the low-pressure hydrogen storage tank of the hydrogen production system by a compressor, and then the hydrogen is filled into a 20MPa hydrogen storage device through a filling column, and is compressed and stored in a 45MPa hydrogen storage bottle group through a 45MPa compressor. When the vehicle is hydrogenated, gas is taken from the hydrogen storage bottle group in sequence through the sequential control valve group to directly refuel the vehicle; and when the demand for hydrogen in the station is not high, it can be filled into a long-tube trailer through the filling column; in addition, during the maintenance and overhaul of the hydrogen production equipment, hydrogen can be purchased from a long-tube trailer and unloaded and compressed and stored through the unloading column to ensure the normal operation of the hydrogenation station.

[0075] In specific implementation, the integrated photovoltaic storage and charging parking lot 6 is a new photovoltaic power generation application mode of photovoltaic + charging pile + energy storage, and is an important part of the power grid 14. It can be used for peak shaving and valley filling, and can operate off-grid, which can improve the reliability of regional power supply. In this embodiment, the integrated photovoltaic storage and charging parking lot 6 mainly includes the power grid 14, AC and DC charging piles (i.e. the aforementioned charging equipment), a carport photovoltaic power generation system, an energy storage system and an energy management system; among them, the photovoltaic carport is a component of the distributed photovoltaic power generation equipment 1, the energy storage demand of the charging pile is also merged with the energy storage power station 3, and the car charging pile is connected to the factory area 10kV power transmission and distribution system to utilize the new energy power generation equipment and the power grid 14 for power supply.

[0076] In a specific embodiment, the specific structure of the sewage source heat pump device 8 is provided below; wherein, in this embodiment, it can be set as an indirect water source heat pump device or a direct water source heat pump device, which are described separately below:

[0077] Optionally, the detailed structure of the indirect water source heat pump device is disclosed as follows:

[0078] Among them, the example indirect water source heat pump device may include but is not limited to: a screw sewage source heat pump heating unit 81, a screw sewage source heat pump cold / hot switching unit 82, a cold and hot device 83, an intermediate heat exchanger 84, a reclaimed water buffer tank 85, a sludge drying device 86, a switching valve 87, a sludge drying heating circulation pump 88, a user side circulation pump 89, an intermediate water circulation pump 810 and a reclaimed water circulation pump 811; wherein the connection structure of the aforementioned various devices is:

[0079] See also Figure 2As shown, the inlet of the grey water buffer tank 85 is connected to the output port of the grey water recovery device 15, wherein the outlet of the grey water buffer tank 85 is connected to the input port of the intermediate heat exchanger 84 through the grey water circulation pump 811, the first output port of the intermediate heat exchanger 84 is connected to the first port of the screw sewage source heat pump heating unit 81 (to provide a heat source for it), and the second port of the screw sewage source heat pump heating unit 81 is connected to the inlet of the sludge drying equipment 86 through the sludge drying heating circulation pump 88 (to transport the heat source to the sludge drying equipment 86, thereby drying the sludge); at the same time, the outlet of the sludge drying equipment 86 is connected to the third port of the screw sewage source heat pump heating unit 81, and the fourth port of the screw sewage source heat pump heating unit 81 is connected to the first receiving port of the intermediate heat exchanger 84, so that the cold source can be recovered and transported to the intermediate heat exchanger 84 for heat exchange.

[0080] Furthermore, the intermediate water circulation pump 810 is arranged between the first output port of the intermediate heat exchanger 84 and the first port of the screw-type sewage source heat pump heating unit 81, wherein the intermediate water circulation pump 810 and two switching valves 87 are arranged in sequence between the second output port of the intermediate heat exchanger 84 and the first port of the screw-type sewage source heat pump cold / hot switching unit 82, and the switching valve 87 is also arranged between the second port of the screw-type sewage source heat pump cold / hot switching unit 82 and the user-side circulation pump 89.

[0081] In this way, the indirect type mainly includes three main circulations. The first is the grey water side circulation, which transports the grey water treated by the sewage treatment plant to the grey water recovery device 15. The grey water is first introduced into the grey water buffer tank 85 and then sent to the intermediate heat exchanger 84 for heat exchange with the heat pump unit before discharge; the second is the intermediate water circulation, which uses the intermediate water as the intermediate heat medium to circulate between the heat pump unit and the sewage heat exchanger for heat exchange; the third is the user side water circulation between the unit and the cold and hot equipment 83.

[0082] Of course, the sewage source heat pump equipment 8 can also adopt a direct water source heat pump device, wherein this method has high requirements on the anti-blocking and anti-corrosion of the heat pump unit, but the system structure is relatively simple.

[0083] Optionally, the specific structure of the direct water source heat pump device provided below includes: a screw sewage source heat pump heating unit 81, a screw sewage source heat pump cold / hot switching unit 82, cold and hot equipment 83, a grey water buffer tank 85, a sludge drying equipment 86, a switching valve 87, a sludge drying heating circulation pump 88, a user side circulation pump 89 and a grey water circulation pump 811.

[0084] See also Figure 3As shown, the connection structure of the aforementioned various devices is as follows: the grey water buffer tank 85 is connected to the first port of the screw-type sewage source heat pump heating unit 81 through the grey water circulation pump 811, the second port of the screw-type sewage source heat pump heating unit 81 is connected to the inlet of the sludge drying equipment 86 through the sludge drying heating circulation pump 88, and the outlet of the sludge drying equipment (86) is connected to the third port of the screw-type sewage source heat pump heating unit 81; at the same time, the grey water buffer tank 85 is also connected to the first port of the screw-type sewage source heat pump cold / hot switching unit 82 through the grey water circulation pump 811, The second port of the screw-type sewage source heat pump cold / hot switching unit 82 is connected to the inlet of the cold and hot equipment 83 through the user-side circulating pump 89, and the outlet of the cold and hot equipment 83 is connected to the third port of the screw-type sewage source heat pump cold / hot switching unit 82; in addition, in this embodiment, two switching valves 87 are arranged in the pipeline between the grey water circulating pump 811 and the first port of the screw-type sewage source heat pump cold / hot switching unit 82, and the switching valve 87 is also arranged on the pipeline between the outlet of the cold and hot equipment 83 and the third port of the screw-type sewage source heat pump cold / hot switching unit 82.

[0085] Based on this, the direct water source heat pump device includes two main circulations, one is the grey water side circulation, which transports the grey water treated in the sewage treatment plant to the grey water recovery device 15, and the grey water is first introduced into the grey water buffer tank 85 and then sent to the heat pump unit for heat exchange; the other is the user side water circulation between the unit and the cold and hot equipment 8-3; of course, the sewage source heat pump equipment 8 is connected to the 10kV power transmission and distribution system of the plant (that is, the aforementioned power transmission and distribution line), and hot water and chilled water are supplied to each cold and hot equipment 83 through underground pipes laid in the plant.

[0086] In the specific implementation, see Figure 1 As shown, the present embodiment is also provided with a wind-solar complementary street lamp 7, wherein the wind-solar complementary street lamp 7 includes a wind turbine, a solar photovoltaic cell group, a battery and an inverter, the wind turbine and the solar photovoltaic cell group are installed on the street lamp body, the wind turbine and the solar photovoltaic cell group are electrically connected to the battery, the battery is electrically connected to the power supply end of the street lamp body through the inverter, and the power grid 14 is electrically connected to the power supply end of the street lamp body; in this way, the solar cell assembly and the wind turbine can be used to store the converted electric energy in the battery, when the street lamp is lit at night, the inverter converts the direct current stored in the battery into alternating current, so as to supply electricity to the lamp; based on this, the appearance of the factory area can be improved while meeting the needs of part of the electric load 9.

[0087] In addition, in this embodiment, an energy total management device 16 is also provided, which is used to collect energy data in the production process of the sewage treatment plant, conduct real-time monitoring, analysis and optimization, and realize optimal configuration and intelligent management and control of the energy consumption of the plant area; specifically, when it is working, it is used to obtain the total power generation of the new energy power supply equipment and the total power load of the sewage treatment plant; then, according to the total power generation and the total power load, the power supply strategy of the sewage treatment plant is determined, and according to the power supply strategy, the power supply of the new energy power supply equipment, the energy storage power station 3 and the power grid 14 is controlled.

[0088] Furthermore, the following discloses the specific generation process of the aforementioned power supply strategy, that is, adopting the operation strategy of "self-generation for self-use, surplus power to the grid", specifically:

[0089] See also Figure 4 As shown, the total energy management device 16 is used to determine whether the total power generation is greater than or equal to the total power load, wherein the total energy management device 16 is used to generate a first strategy when it is determined that the total power generation is greater than or equal to the total power load, and control the power supply of the sewage treatment plant according to the first strategy.

[0090] In this embodiment, the first strategy is taken as an example that the energy general management device 16 controls the distributed photovoltaic power generation equipment 1 and the distributed wind power generation equipment 2 in the new energy power supply equipment to be incorporated into the transmission and distribution lines of the sewage treatment plant, to supply power to the hydrogen production equipment 4, the hydrogenation equipment 5, the sewage source heat pump equipment 8 and the target equipment, and to charge the energy storage power station 3; of course, if there is any surplus electricity, the surplus electricity can be incorporated into the power grid, that is, transmitted to the power grid 14.

[0091] At the same time, when the total energy management device 16 determines that the total power generation is less than the total power load, it determines whether the power consumption period of the power grid 14 is in the off-peak period; if it is determined that the power consumption period of the power grid 14 is in the off-peak period, a second strategy is generated to control the power supply of the sewage treatment plant according to the second strategy.

[0092] In this embodiment, the second strategy is that the energy management device 16 controls the power grid 14 to supply power to the energy storage power station 3, and controls the distributed photovoltaic power generation equipment 1 and the distributed wind power generation equipment 2 to be incorporated into the transmission and distribution lines of the sewage treatment plant, so as to supply power to the hydrogen production equipment 4, the hydrogenation equipment 5, the sewage source heat pump equipment 8 and the target equipment; specifically, the energy storage power station 3 is charged by valley electricity, and then the new energy power generation equipment and valley electricity are used to supply power to various equipment in the plant.

[0093] At the same time, the energy management device 16 is used to determine whether the sum of the storage capacity of the energy storage power station 3 and the total generated power meets the total power load when it is determined that the power consumption period of the power grid 14 is not in the off-peak period, and generate a third strategy when it is determined that the sum of the storage capacity of the energy storage power station 3 and the total generated power meets the total power load, so as to control the power supply of the sewage treatment plant according to the third strategy; wherein, the third strategy is taken as an example: the energy management device 16 controls the distributed photovoltaic power generation equipment 1, the distributed wind power generation equipment 2 and the energy storage power station to be incorporated into the power transmission and distribution lines of the sewage treatment plant to supply power to the electrical equipment of the sewage treatment plant; in this embodiment, when the power consumption time of the power grid is not in the off-peak period, wind and solar power generation and the energy storage power station 3 are used to jointly supply power to the plant to meet the total power load.

[0094] In specific implementation, the total power load includes non-adjustable load and adjustable load, wherein the non-adjustable load includes the power load generated when the target equipment and the sewage source heat pump equipment 8 are in operation (i.e., the production and living power load and the power load of the sewage source heat pump operation), and the adjustable load is the power load generated when the hydrogen production equipment 4, the hydrogenation equipment 5 and the charging equipment in the integrated photovoltaic storage and charging parking lot 6 are in operation; therefore, when the total energy management device 16 is used to determine that the sum of the storage capacity of the energy storage power station 3 and the total power generation does not meet the total power load, it is necessary to generate a power supply strategy based on the adjustable load and the non-adjustable load.

[0095] Specifically, it is to determine whether the sum of the storage capacity of the energy storage power station 3 and the total power generation meets the non-adjustable load; wherein, if it is determined that the sum of the storage capacity of the energy storage power station (3) and the total power generation does not meet the non-adjustable load, at this time, a fourth strategy is generated, and the power supply of the sewage treatment plant is controlled according to the fourth strategy; wherein, the fourth strategy is to integrate the distributed photovoltaic power generation equipment 1, the distributed wind power generation equipment 2 and the power grid into the transmission and distribution lines of the sewage treatment plant, and stop supplying power to the hydrogen production equipment 4, the hydrogenation equipment 5 and the charging equipment in the integrated light storage and charging parking lot 6; in this way, it is equivalent to first satisfying the power supply of the non-adjustable load to ensure the normal operation of the sewage treatment plant.

[0096] Of course, when it is determined that the sum of the storage capacity of the energy storage power station 3 and the total power generation meets the non-adjustable load, a fifth strategy is generated, and the power supply of the sewage treatment plant is controlled according to the fifth strategy; wherein, the fifth strategy is: the distributed photovoltaic power generation equipment 1, the distributed wind power generation equipment 2 and the energy storage power station 3 are incorporated into the transmission and distribution lines of the sewage treatment plant, and the operating power of the hydrogen production equipment 4, the hydrogenation equipment 5 and the charging equipment in the integrated light storage and charging parking lot 6 is reduced; in this embodiment, the amount of power reduction can be determined based on the difference between the sum of the aforementioned storage capacity and the total power generation and the corresponding power of the non-adjustable load, that is, different operating power tables are pre-set, and the operating powers corresponding to different differences are stored in the table, so data matching can be performed in the table when using it.

[0097] Therefore, through the above-mentioned power supply strategy, the power supply mode of the sewage treatment plant can be flexibly adjusted to achieve the goal of energy conservation and emission reduction.

[0098] In addition, in this embodiment, for the urban sewage treatment plant, in terms of heat load 10, its supply and return water temperatures are generally 80°C / 50°C, and fluctuate with the seasons, with a small fluctuation range within 24 hours per day. The heat load 10 supply / return water temperatures for heating in winter are 110°C / 50°C, and the demand fluctuates with the temperature. Therefore, in the heating season, the heat pump needs to provide hot water in two working conditions; and for cooling load 11, there is a cooling demand for production and living buildings in summer, which is generally 7°C chilled water and a return water temperature of 12°C. Part of the heat pump unit is set as a year-round heating unit to provide a heat source for sludge drying, and part is set as a switchable unit for cold and warm working conditions, heating in winter and switching to hot and cold working conditions in summer. Cooling conditions; in this way, by predicting and real-time monitoring of the cold / heat load demand, the cold / heat load 10 supply is controlled and adjusted according to the following three situations: a. In the heating season, the year-round heating unit provides 80℃ hot water to meet the heat load demand of production, and the switchable unit provides 110℃ hot water to meet the heat load demand of heating, and the number of units started and stopped is controlled according to demand; b. In the cooling season, the year-round heating unit provides 80℃ hot water to meet the heat load demand of production, and the switchable unit switches to the cooling condition to provide 7℃ chilled water to meet the cold load 11 demand; c. In normal seasons, only the year-round heating unit is turned on to provide 80℃ hot water to meet the heat load 10 demand of production.

[0099] Therefore, through the above-mentioned detailed description of the comprehensive energy zero-carbon system of the urban sewage treatment plant, the present invention has constructed a new power supply mode based on "renewable energy as the main and power grid as the auxiliary", and uses waste heat recovery technology to meet the cold and heat load requirements. In this way, the power consumption of the power grid can be reduced, thereby achieving effective carbon reduction in the production of the sewage treatment plant; therefore, the present invention includes multiple new energy elements such as wind, light, hydrogen, and storage, and develops a comprehensive energy supply system based on "source-grid-load-storage", and pioneeringly seeks a new model for the development of new energy in the park, which has a positive role in promoting the diversified development of the comprehensive energy field.

[0100] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A comprehensive energy zero-carbon system for urban sewage treatment plants, characterized in that: include: New energy power supply equipment, wherein the new energy power supply equipment includes a distributed photovoltaic power generation equipment (1) and a distributed wind power generation equipment (2), and the power grid (14) of the sewage treatment plant, the transmission ends of the distributed photovoltaic power generation equipment (1) and the distributed wind power generation equipment (2) are all electrically connected to the charging end of the energy storage power station (3) in the sewage treatment plant; Electrical equipment used in a sewage treatment plant, wherein the electrical equipment used in the sewage treatment plant includes hydrogen production equipment (4), hydrogen refueling equipment (5), charging equipment in a photovoltaic storage and charging integrated parking lot (6), sewage source heat pump equipment (8) and target equipment, and the target equipment is electrical equipment in the sewage treatment plant other than the energy storage power station (3), hydrogen production equipment (4), hydrogen refueling equipment (5), charging equipment and sewage source heat pump equipment (8); The transmission ends of the power grid (14), the energy storage power station (3), the distributed photovoltaic power generation equipment (1) and the distributed wind power generation equipment (2) are also electrically connected to the power supply ends of the electrical equipment of the sewage treatment plant, wherein the new energy power supply equipment serves as the main power supply of the sewage treatment plant, and the power grid (14) and the energy storage power station (3) serve as auxiliary power supplies of the sewage treatment plant; The sewage source heat pump device (8) is connected to a reclaimed water recovery device (15), and the reclaimed water output by the reclaimed water recovery device (15) is used as a heat source. The sewage source heat pump device (8) serves as a heating end and a cooling end of buildings in a sewage treatment plant, thereby providing a heating source and a cooling source for the buildings in the sewage treatment plant.

2. The integrated energy zero-carbon system for urban sewage treatment plants according to claim 1 is characterized in that: The energy storage power station (3) comprises: a battery stack, an electrolyte storage tank, an electrolyte circulation pump, a battery management system, an energy storage inverter and an energy management system; wherein the battery stack is connected to the electrolyte storage tank via the electrolyte circulation pump, the power grid is electrically connected to the input end of the energy storage inverter via an AC circuit breaker, the output end of the energy storage inverter is electrically connected to the battery stack, the battery management system is electrically connected to the controlled end of the battery stack, and the energy management system is electrically connected to the controlled end of the battery management system.

3. The integrated energy zero-carbon system for urban sewage treatment plants according to claim 1 is characterized in that: The hydrogen production equipment (4) comprises: an electrolyzer, a gas-liquid processor, a hydrogen drying and purifying device, a hydrogen storage bottle group, a rectifier cabinet and a rectifier transformer; The output end of the power transmission and distribution line of the sewage treatment plant is electrically connected to the power supply end of the electrolyzer through the rectifier transformer and the rectifier cabinet in sequence, and the input end of the power transmission and distribution line is electrically connected to the power transmission end of the new energy power supply equipment, the power transmission end of the energy storage power station (3) and the power grid (14); The air duct of the electrolyzer is connected to the gas-liquid processor, and the gas-liquid processor performs gas-liquid separation on the hydrogen and oxygen output by the air duct of the electrolyzer, wherein the hydrogen output end of the gas-liquid processor is connected to the air inlet of the hydrogen drying purifier, the air outlet of the hydrogen drying purifier is connected to the hydrogen storage bottle group through a hydrogen film regulating valve, and the oxygen output end of the gas-liquid processor is connected to the oxygen supply end of the sewage treatment equipment in the sewage plant.

4. The integrated energy zero-carbon system for urban sewage treatment plants according to claim 1 is characterized in that: The sewage source heat pump equipment (8) comprises: an indirect water source heat pump device or a direct water source heat pump device; The indirect water source heat pump device comprises: a screw sewage source heat pump heating unit (81), a screw sewage source heat pump cold / hot switching unit (82), a cold and hot device (83), an intermediate heat exchanger (84), a grey water buffer tank (85), a sludge drying device (86), a switching valve (87), a sludge drying heating circulation pump (88), a user side circulation pump (89), an intermediate water circulation pump (810) and a grey water circulation pump (811); The inlet of the reclaimed water buffer tank (85) is connected to the outlet of the reclaimed water recovery device (15), wherein the outlet of the reclaimed water buffer tank (85) is connected to the inlet of the intermediate heat exchanger (84) through the reclaimed water circulation pump (811), the first outlet of the intermediate heat exchanger (84) is connected to the first port of the screw sewage source heat pump heating unit (81), the second port of the screw sewage source heat pump heating unit (81) is connected to the inlet of the sludge drying equipment (86) through the sludge drying heating circulation pump (88), the outlet of the sludge drying equipment (86) is connected to the third port of the screw sewage source heat pump heating unit (81), and the fourth port of the screw sewage source heat pump heating unit (81) is connected to the first receiving port of the intermediate heat exchanger (84); The second output port of the intermediate heat exchanger (84) is connected to the first port of the screw-type sewage source heat pump cold / hot switching unit (82), and the second port of the screw-type sewage source heat pump cold / hot switching unit (82) is connected to the inlet of the cold and hot equipment (83) through the user-side circulation pump (89), wherein the outlet of the cold and hot equipment (83) is connected to the third port of the screw-type sewage source heat pump cold / hot switching unit (82), and the fourth port of the screw-type sewage source heat pump cold / hot switching unit (82) is connected to the second receiving port of the intermediate heat exchanger (84); The intermediate water circulation pump (810) is arranged between the first output port of the intermediate heat exchanger (84) and the first port of the screw-type sewage source heat pump heating unit (81), wherein the intermediate water circulation pump (810) and two switching valves (87) are arranged in sequence between the second output port of the intermediate heat exchanger (84) and the first port of the screw-type sewage source heat pump cold / hot switching unit (82), and the switching valve (87) is also arranged between the second port of the screw-type sewage source heat pump cold / hot switching unit (82) and the user-side circulation pump (89).

5. The integrated energy zero-carbon system for urban sewage treatment plants according to claim 4 is characterized in that: The direct water source heat pump device comprises: a screw sewage source heat pump heating unit (81), a screw sewage source heat pump cold / hot switching unit (82), cold and hot equipment (83), a grey water buffer tank (85), a sludge drying device (86), a switching valve (87), a sludge drying heating circulation pump (88), a user side circulation pump (89) and a grey water circulation pump (811); The reclaimed water buffer tank (85) is connected to the first port of the screw-type sewage source heat pump heating unit (81) through the reclaimed water circulation pump (811), the second port of the screw-type sewage source heat pump heating unit (81) is connected to the inlet of the sludge drying equipment (86) through the sludge drying heating circulation pump (88), and the outlet of the sludge drying equipment (86) is connected to the third port of the screw-type sewage source heat pump heating unit (81); The reclaimed water buffer tank (85) is also connected to the first port of the screw-type sewage source heat pump cold / hot switching unit (82) through the reclaimed water circulation pump (811), the second port of the screw-type sewage source heat pump cold / hot switching unit (82) is connected to the inlet of the cold / hot device (83) through the user-side circulation pump (89), and the outlet of the cold / hot device (83) is connected to the third port of the screw-type sewage source heat pump cold / hot switching unit (82); Among them, two switching valves (87) are arranged in the pipeline between the grey water circulation pump (811) and the first port of the screw-type sewage source heat pump cold / hot switching unit (82), and the switching valve (87) is also arranged on the pipeline between the outlet of the cold and hot equipment (83) and the third port of the screw-type sewage source heat pump cold / hot switching unit (82).

6. The integrated energy zero-carbon system for urban sewage treatment plants according to claim 1 is characterized in that: Also includes: A wind-solar complementary street lamp (7), wherein the wind-solar complementary street lamp (7) comprises a wind generator set, a solar photovoltaic cell set, a storage battery and an inverter, wherein the wind generator set and the solar photovoltaic cell set are installed on a street lamp body, the wind generator set and the solar photovoltaic cell set are electrically connected to the storage battery, the storage battery is electrically connected to the power supply end of the street lamp body through the inverter, and the power grid (14) is electrically connected to the power supply end of the street lamp body.

7. The integrated energy zero-carbon system for urban sewage treatment plants according to claim 1 is characterized in that: Also includes: The total energy management device is used to obtain the total power generation of the new energy power supply equipment and the total power load of the sewage treatment plant; The total energy management device is used to determine the power supply strategy of the sewage treatment plant based on the total power generation and the total power load, and control the power supply of the new energy power supply equipment, the energy storage power station (3) and the power grid (14) according to the power supply strategy.

8. The integrated energy zero-carbon system for urban sewage treatment plants according to claim 7 is characterized in that: The energy total management device is used to determine whether the total power generation is greater than or equal to the total power load; The energy management device is used to generate a first strategy when it is determined that the total power generation is greater than or equal to the total power load, and to control the power supply of the sewage treatment plant according to the first strategy, wherein the first strategy is that the energy management device controls the distributed photovoltaic power generation equipment (1) and the distributed wind power generation equipment (2) in the new energy power supply equipment to be incorporated into the power transmission and distribution lines of the sewage treatment plant, to supply power to the hydrogen production equipment (4), the hydrogenation equipment (5), the sewage source heat pump equipment (8) and the target equipment, and to charge the energy storage power station (3); The energy management device is used to determine whether the power consumption period of the power grid (14) is in a valley power period when it is determined that the total power generation is less than the total power load; The energy management device is used to generate a second strategy when it is determined that the power consumption period of the power grid (14) is in the off-peak period, so as to control the power supply of the sewage treatment plant according to the second strategy, wherein the second strategy is that the energy management device controls the power grid (14) to supply power to the energy storage power station (3), and controls the distributed photovoltaic power generation equipment (1) and the distributed wind power generation equipment (2) to be incorporated into the power transmission and distribution lines of the sewage treatment plant, so as to supply power to the hydrogen production equipment (4), the hydrogenation equipment (5), the sewage source heat pump equipment (8) and the target equipment.

9. The integrated energy zero-carbon system for urban sewage treatment plants according to claim 8, characterized in that: The energy management device is used to determine whether the sum of the storage capacity of the energy storage power station (3) and the total power generation meets the total power load when it is determined that the power consumption period of the power grid (14) is not in the off-peak period, and to generate a third strategy when it is determined that the sum of the storage capacity of the energy storage power station (3) and the total power generation meets the total power load, so as to control the power supply of the sewage treatment plant according to the third strategy; Among them, the third strategy is: the energy management device controls the distributed photovoltaic power generation equipment (1), the distributed wind power generation equipment (2) and the energy storage power station to be integrated into the power transmission and distribution lines of the sewage treatment plant to supply power to the electrical equipment of the sewage treatment plant.

10. The integrated energy zero-carbon system for urban sewage treatment plants according to claim 9, characterized in that: The total power load includes an unadjustable load and an adjustable load, wherein the unadjustable load includes the power load generated when the target device and the sewage source heat pump device (8) are in operation, and the adjustable load is the power load generated when the hydrogen production device (4), the hydrogenation device (5) and the charging device in the photovoltaic storage and charging integrated parking lot (6) are in operation; The energy total management device is used to determine whether the sum of the storage capacity of the energy storage power station (3) and the total power generation meets the non-adjustable load when it is determined that the sum of the storage capacity of the energy storage power station (3) and the total power generation does not meet the total power load; The energy management device is used to generate a fourth strategy when it is determined that the sum of the storage capacity of the energy storage power station (3) and the total power generation does not meet the non-adjustable load, and control the power supply of the sewage treatment plant according to the fourth strategy, wherein the fourth strategy is to incorporate the distributed photovoltaic power generation equipment (1), the distributed wind power generation equipment (2) and the power grid (14) into the power transmission and distribution lines of the sewage treatment plant, and stop supplying power to the hydrogen production equipment (4), the hydrogenation equipment (5) and the charging equipment in the integrated photovoltaic storage and charging parking lot (6); The energy management device is further configured to generate a fifth strategy when it is determined that the sum of the storage capacity of the energy storage power station (3) and the total power generation capacity satisfies the non-adjustable load, and to control the power supply of the sewage treatment plant according to the fifth strategy; Among them, the fifth strategy is: to integrate the distributed photovoltaic power generation equipment (1), the distributed wind power generation equipment (2) and the energy storage power station (3) into the transmission and distribution lines of the sewage treatment plant, and to reduce the operating power of the hydrogen production equipment (4), the hydrogenation equipment (5) and the charging equipment in the integrated photovoltaic storage and charging parking lot (6).

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