Comprehensive energy zero-carbon system for urban sewage treatment plant

Abstract

The utility model discloses a comprehensive energy zero-carbon system for an urban sewage treatment plant, which constructs a novel power supply mode which takes renewable energy as a main source and takes 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 energy utilization rate of the urban sewage treatment plant is improved. Therefore, the power consumption of a sewage 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 is quite suitable for large-scale application and popularization.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of comprehensive energy, and particularly relates to a comprehensive energy zero-carbon system for a municipal sewage treatment plant. BACKGROUND

[0002] There are a large number of industrial parks in China, 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 amount of energy consumption to promote the development of industrial parks towards zero carbon. At present, the energy supply of industrial parks, especially sewage treatment plants, usually depends on the power grid, resulting in excessive electricity consumption and increased energy consumption and carbon emissions. Therefore, how to provide a comprehensive energy zero-carbon system for a municipal sewage treatment plant to reduce the electricity consumption of the sewage plant has become a problem to be solved. SUMMARY

[0003] The utility model aims at providing a comprehensive energy zero-carbon system for a municipal sewage treatment plant to solve the problem of excessive dependence on the power grid for energy supply, which leads to excessive energy consumption.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

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

[0006] A new energy power supply device, wherein the new energy power supply device comprises a distributed photovoltaic power generation device and a distributed wind power generation device, and the power grid of the sewage plant, the power transmission end of the distributed photovoltaic power generation device and the distributed wind power generation device are electrically connected to the charging end of the energy storage power station in the sewage plant;

[0007] Sewage plant electrical equipment, wherein the sewage plant electrical equipment includes a hydrogen production device, a hydrogenation device, a charging device in a light storage integrated parking lot, a sewage source heat pump device and a target device, and the target device is an electrical equipment in the sewage plant except the energy storage power station, the hydrogen production device, the hydrogenation device, the charging device and the sewage source heat pump device;

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

[0009] The sewage source heat pump equipment is connected with a reclaimed water recovery device, and the reclaimed water output by the reclaimed water recovery device is used as a heat source, and the sewage source heat pump equipment is used as a heating end and a cooling end of a building in the sewage plant to provide a heat source and a refrigeration source for the building in the sewage plant.

[0010] Based on the above disclosure, the comprehensive energy zero-carbon system provided by the utility model, on the basis of traditional power grid power supply, additionally provides new energy power supply equipment such as distributed photovoltaic power generation equipment and distributed wind power generation equipment, wherein, the power grid and the new energy power supply equipment are connected with the charging end of the energy storage power station in the sewage plant, and the charging of the energy storage power station can be realized, at the same time, the power grid, the new energy power supply equipment and the power transmission end of the energy storage power station are also electrically connected with the power supply end of the power consumption equipment in the sewage plant, and the new energy power supply equipment is used as the main power supply of the sewage plant, and the power grid and the energy storage power station are used as the auxiliary power supply of the sewage plant; in this way, a new power supply mode mainly using renewable energy and supplemented by the power grid can be formed, so that the energy dependence on the power grid can be reduced; in addition, the sewage source heat pump equipment in the sewage plant uses the reclaimed water in sewage treatment as a heat source to work and provides a cold and heat source for the building in the plant; in this way, the waste heat recovery technology can be used to meet the cold and heat load demand in the plant, so that the carbon emission of the plant area can be reduced.

[0011] Through the above design, the utility model constructs a new power supply mode mainly using renewable energy and supplemented by the power grid by setting renewable energy power generation equipment such as photovoltaic and wind power, and combining the power grid, in this way, the energy dependence on the power grid can be reduced, so that the power consumption of the sewage plant is reduced; at the same time, the reclaimed water after sewage treatment is used as a heat source, the low-temperature waste heat is fully utilized, a heat source is provided for sludge low-temperature drying, and the building in the plant area is cooled in summer and heated in winter, based on this, the energy consumption can be further reduced, and the effective carbon reduction of sewage plant production is realized, therefore, the utility model is very suitable for large-scale application and popularization.

[0012] In one possible design, the distributed photovoltaic power generation equipment includes a photovoltaic component and a string inverter, wherein the photovoltaic component is installed on the roof surface of a building in the sewage plant and the surface of a sewage treatment tank, the photovoltaic component is electrically connected with the string inverter, is connected with the power transmission and distribution line of the sewage plant through the string inverter, and the photovoltaic component includes a photovoltaic N-type double-sided double-glass component.

[0013] In a possible design, the energy storage power station includes: an electric pile, an electrolyte storage tank, an electrolyte circulating pump, a battery management system, an energy storage converter, and an energy management system; the electric pile is connected to the electrolyte storage tank through the electrolyte circulating pump; the power grid is electrically connected to an input end of the energy storage converter through an alternating current circuit breaker; an output end of the energy storage converter is electrically connected to the electric pile; the battery management system is electrically connected to a controlled end of the electric pile; and the energy management system is electrically connected to a controlled end of the battery management system.

[0014] In a possible design, the hydrogen production device includes: an electrolytic cell, a gas-liquid processor, a hydrogen drying purifier, a hydrogen storage bottle group, a rectifier cabinet, and a rectifier transformer.

[0015] An output end of a power transmission and distribution line of the sewage plant is connected to a power supply end of the electrolytic cell through the rectifier transformer and the rectifier cabinet in sequence; and an input end of the power transmission and distribution line is electrically connected to a power transmission end of the new energy power supply device, a power transmission end of the energy storage power station, and the power grid.

[0016] A gas guide pipe of the electrolytic cell is connected to the gas-liquid processor; the gas-liquid processor performs gas-liquid separation on hydrogen and oxygen output by the gas guide pipe of the electrolytic cell; a hydrogen output end of the gas-liquid processor is connected to an air inlet of the hydrogen drying purifier; an air outlet of the hydrogen drying purifier is connected to the hydrogen storage bottle group through a hydrogen film regulating valve; and an oxygen output end of the gas-liquid processor is connected to an oxygen supply end of a sewage treatment device in the sewage plant.

[0017] In a possible design, the hydrogen production device further includes: a communication pipe, an alkali liquid filter, and a recovery circulating pump.

[0018] The liquid discharge outlet of the gas-liquid processor is connected to the air inlet of the alkali liquid filter through the communication pipe; the outlet of the alkali liquid filter is connected to the input end of the recovery circulating pump; and the output end of the recovery circulating pump is connected to the electrolytic cell.

[0019] In a possible design, the hydrogen production device further includes: a water adding pump, a water tank, and an alkali tank; the alkali tank stores alkali liquid; the input ports of the water tank and the alkali tank are connected to a deionized water tank; the output port of the alkali tank is connected to the electrolytic cell; and the output port of the water tank is connected to a scrubber in the gas-liquid processor through the water adding pump.

[0020] In a possible design, the sewage source heat pump device includes: an indirect water source heat pump device or a direct water source heat pump device.

[0021] In one possible design, the indirect water source heat pump device comprises a screw sewage source heat pump heating unit, a screw sewage source heat pump cooling / heat switching unit, a cooling and heating device, an intermediate heat exchanger, a reclaimed water buffer pool, a sludge drying device, a switching valve, a sludge drying heating circulating pump, a user side circulating pump, an intermediate water circulating pump and a reclaimed water circulating pump;

[0022] The inlet of the reclaimed water buffer pool is communicated with the outlet of the reclaimed water recovery device, the outlet of the reclaimed water buffer pool is communicated with the inlet of the intermediate heat exchanger through the reclaimed water circulating pump, the first outlet of the intermediate heat exchanger is communicated with 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 communicated with the inlet of the sludge drying device through the sludge drying heating circulating pump, the outlet of the sludge drying device is communicated with 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 communicated with the first receiving port of the intermediate heat exchanger;

[0023] The second outlet of the intermediate heat exchanger is communicated with the first port of the screw sewage source heat pump cooling / heat switching unit, the second port of the screw sewage source heat pump cooling / heat switching unit is communicated with the inlet of the cooling and heating device through the user side circulating pump, the outlet of the cooling and heating device is communicated with the third port of the screw sewage source heat pump cooling / heat switching unit, and the fourth port of the screw sewage source heat pump cooling / heat switching unit is communicated with the second receiving port of the intermediate heat exchanger;

[0024] The intermediate water circulating pump is arranged between the first outlet of the intermediate heat exchanger and the first port of the screw sewage source heat pump heating unit, the intermediate water circulating pump and two switching valves are sequentially arranged between the second outlet of the intermediate heat exchanger and the first port of the screw sewage source heat pump cooling / heat switching unit, and the switching valve is also arranged between the second port of the screw sewage source heat pump cooling / heat switching unit and the user side circulating pump.

[0025] In one possible design, the direct water source heat pump device comprises a screw sewage source heat pump heating unit, a screw sewage source heat pump cooling / heat switching unit, a cooling and heating device, a reclaimed water buffer pool, a sludge drying device, a switching valve, a sludge drying heating circulating pump, a user side circulating pump and a reclaimed water circulating pump;

[0026] The reclaimed water buffer pool is communicated with the first port of the screw sewage source heat pump heating unit through the reclaimed water circulating pump, the second port of the screw sewage source heat pump heating unit is communicated with the inlet of the sludge drying device through the sludge drying heating circulating pump, and the outlet of the sludge drying device is communicated with the third port of the screw sewage source heat pump heating unit;

[0027] The intermediate water buffer tank is also connected to the first port of the screw sewage source heat pump cold / heat switching unit through the intermediate water circulating pump, the second port of the screw sewage source heat pump cold / heat switching unit is connected to the inlet of the cold and heat equipment through the user side circulating pump, and the outlet of the cold and heat equipment is connected to the third port of the screw sewage source heat pump cold / heat switching unit.

[0028] Two switching valves are arranged in the pipeline between the intermediate water circulating pump and the first port of the screw sewage source heat pump cold / heat switching unit, and the switching valve is also arranged on the pipeline between the outlet of the cold and heat equipment and the third port of the screw sewage source heat pump cold / heat switching unit.

[0029] In a possible design, the wind-solar complementary street lamp further comprises a wind power generator set, a solar photovoltaic cell set, a storage battery and an inverter, wherein the wind power generator set and the solar photovoltaic cell set are installed on a street lamp body, the wind power generator set and the solar photovoltaic cell set are electrically connected to the storage battery, the storage battery is electrically connected to a 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.

[0030] Advantages:

[0031] The renewable energy power generation equipment such as photovoltaic and wind power is arranged, and the power grid is combined to construct a new power supply mode mainly using renewable energy and supplemented by the power grid, so that the energy dependence on the power grid is reduced, and the power consumption of the sewage plant is reduced. At the same time, the intermediate water treated by the sewage plant is used as a heat source, the low-temperature waste heat is fully utilized, the heat source is provided for sludge low-temperature drying, and the plant buildings are cooled in summer and heated in winter. Based on this, the energy consumption can be further reduced, and the effective carbon reduction of sewage plant production is realized. Therefore, the utility model is very suitable for large-scale application and popularization. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 The utility model provides a schematic diagram of the architecture of the urban sewage treatment plant comprehensive energy zero-carbon system;

[0033] Figure 2 The utility model provides a schematic diagram of the structure of the indirect water source heat pump device;

[0034] Figure 3 The utility model provides a schematic diagram of the structure of the direct water source heat pump device;

[0035] Figure 4 The utility model provides a power control flow chart.

[0036] Reference signs:

[0037] 1-distributed photovoltaic power generation equipment; 2-distributed wind power generation equipment; 3-energy storage power station; 4-hydrogen production equipment; 5-hydrogen addition equipment; 6-light storage integrated parking lot; 7-wind-solar complementary street lamp; 8-sewage source heat pump equipment; 14-power grid; 15-reclaimed water recovery device; 81-screw sewage source heat pump heating unit; 82-screw sewage source heat pump cold / heat switching unit; 83-cold and heat equipment; 84-intermediate heat exchanger; 85-reclaimed water buffer pool; 86-sludge drying equipment; 87-switching valve; 88-sludge drying heating circulating pump; 89-user side circulating pump; 810-intermediate water circulating pump; 811-reclaimed water circulating pump; 9-electric load; 11-cold load; 10-heat load; 16-energy total management equipment. DETAILED DESCRIPTION

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the present application 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 application, and for those skilled in the art, other drawings can be obtained without creative labor. It should be noted that the description of these embodiments is used to help understand the present application, but does not constitute a limitation on the present application.

[0039] It should be understood that although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element can be called a second element, and similarly a second element can be called a first element without departing from the scope of the example embodiments of the present application.

[0040] It should be understood that for the term "and / or" that may appear in the present text, it is only a description of the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B, which means that there are three cases of A alone, B alone, and A and B together; for the term " / and" that may appear in the present text, it is another description of the relationship of another associated object, which means that there can be two kinds of relationships, for example, A / and B, which means that there are two cases of A alone and A and B together; in addition, for the character " / " that may appear in the present text, it generally means that the associated objects before and after are an "or" relationship.

[0041] Embodiment:

[0042] Reference Figure 1As shown, the comprehensive energy zero-carbon system of the municipal sewage treatment plant provided by the embodiment can but is not limited to include: a new energy power supply device, a sewage plant power consumption device, an energy storage power station 3, a sewage source heat pump device 8, and a reclaimed water recovery device 15; wherein the new energy power supply device is used for main power supply of the sewage plant, which can complete continuous power supply of the sewage plant in combination with the power grid 14; the energy storage power station 3 completes energy storage and can provide external discharge function, so as to assist the new energy power supply device and the power grid 14 to supply power to the sewage plant, and the sewage source heat pump device 8 is used as a sludge drying device to treat sludge; finally, the reclaimed water recovery device 15 plays a role in reclaimed water recovery in sewage treatment and provides a heat source for the sewage source heat pump device 8.

[0043] Optionally, the detailed component structure of each device is disclosed as follows:

[0044] In specific application, the new energy power supply device can but is not limited to include: a distributed photovoltaic power generation device 1 and a distributed wind power generation device 2, wherein the power transmission end of the power grid 14 of the sewage plant, the distributed photovoltaic power generation device 1 and the distributed wind power generation device 2 are electrically connected to the charging end of the energy storage power station 3 in the sewage plant to realize charging of the energy storage power station 3.

[0045] At the same time, the sewage plant power consumption device can but is not limited to include: a hydrogen production device 4, a hydrogenation device 5, a charging device in a light storage integrated parking lot 6, a sewage source heat pump device 8 and a target device, and the target device is a power consumption device in the sewage plant except the energy storage power station 3, the hydrogen production device 4, the hydrogenation device 5, the charging device and the sewage source heat pump device 8, such as various office equipment, lighting equipment and the like; so, it is equivalent to using the new energy power supply device in combination with the power grid and the energy storage power station 3 to realize power supply of the foregoing sewage plant power consumption device.

[0046] Specifically, the power transmission end of the power grid 14, the energy storage power station 3, the distributed photovoltaic power generation device 1 and the distributed wind power generation device 2 is also electrically connected to the power supply end of the sewage plant power consumption device, specifically, is integrated into the power transmission and distribution line of the sewage plant to connect the power supply end of the sewage plant power consumption device, thereby completing power supply of the foregoing each device; further, in the embodiment, the new energy power supply device is used as the main power supply of the sewage plant, and the power grid 14 and the energy storage power station 3 are used as the auxiliary power supply of the sewage plant; so, a new power supply mode of “renewable energy as the main power supply and the power grid as the auxiliary power supply” can be formed, based on which, the dependence of the sewage plant on the power grid can be reduced, thereby reducing the power consumption of the power grid and achieving the purpose of reducing energy consumption.

[0047] In a specific application, the sewage source heat pump equipment 8 is also connected with the reclaimed water recovery device 15, so that the reclaimed water output by the reclaimed water recovery device 15 is used as a heat source, that is, when the sewage source heat pump equipment 8 carries out the sludge drying process, a large amount of heat energy is needed, and the traditional way usually uses a coal-fired or oil-fired boiler to provide it, which needs a large amount of fuel, while the present embodiment uses the heat in the reclaimed water to recover the low-grade heat therein and convert it into energy to meet the needs of the plant area; in this way, the dependence on fossil fuels can be effectively reduced, thereby achieving energy saving and emission reduction.

[0048] Further, the sewage source heat pump equipment 8 is used as a heating end and a cooling end of the building in the sewage plant, thereby providing a heat source and a refrigeration source for the building in the sewage plant, that is, providing hot water and frozen water for the sewage plant area, and supplying them to various cold and hot equipment through the buried pipe erected in the plant area; in this way, the building in the plant area can be provided with heating in winter, reducing the dependence on traditional heating methods and reducing carbon emissions; similarly, in summer, it is switched to a refrigeration mode to provide air conditioning for the building in the plant area to meet the cooling demand.

[0049] Therefore, through the foregoing description, the urban sewage treatment plant comprehensive energy zero-carbon system provided by the present embodiment constructs a new power supply mode with "renewable energy as the main source and grid electricity as the auxiliary source", and uses waste heat recovery technology to meet the cooling and heating load demand in the plant, so that the power consumption of the sewage plant can be reduced, thereby achieving effective carbon reduction in sewage plant production.

[0050] In one possible design, the following provides the detailed structure of each device in the foregoing comprehensive energy zero-carbon system:

[0051] First, the distributed photovoltaic power generation equipment 1 may include, but is not limited to, a photovoltaic module and a string inverter; specifically, the photovoltaic module is installed on the roof surface of the building in the sewage plant and the surface of the sewage treatment tank, the photovoltaic module is electrically connected to the string inverter, and the string inverter is connected to the power transmission and distribution line of the sewage plant, thereby supplying power to the power consumption equipment of the sewage plant; at the same time, the photovoltaic module includes a photovoltaic N-type double-sided double-glass module, of course, other photovoltaic modules can also be used, which are not limited to the foregoing examples.

[0052] Similarly, the distributed wind power generation equipment 2 includes a micro wind turbine and necessary electrical equipment such as an inverter; wherein the micro wind turbine is arranged in idle land, green land, etc. in the plant area, and is connected to the power transmission and distribution line of the sewage plant through the inverter, thereby ensuring power supply to the sewage plant; at the same time, the distributed photovoltaic power generation equipment and the distributed wind power generation equipment adopt a "self-generation and self-use, and surplus electricity on the grid" operation mode; of course, the foregoing operation mode is described below.

[0053] Secondly, the detailed structure of the following disclosed energy storage power station 3 is disclosed:

[0054] In the embodiment, the energy storage power station 3 is a full vanadium 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 stack, an electrolyte storage tank, an electrolyte circulating pump, a battery management system BMS, a power conversion system PCS and an energy management system EMS; specifically, the stack is connected to the electrolyte storage tank through the electrolyte circulating pump, the power grid is electrically connected to the input end of the PCS through an AC circuit breaker, the output end of the PCS is electrically connected to the stack, the BMS is electrically connected to the controlled end of the stack, and the EMS is electrically connected to the controlled end of the BMS.

[0055] Based on this, the commercial power output by the power grid 14 is prevented from lightning through an AC circuit breaker, and then flows through the AC / DC module in the PCS. The AC power is converted into DC voltage through the AC / DC module, and then connected to the stack through a DC circuit breaker to charge the stack. When discharging, the DC power output by the stack is converted into AC power through the AC / DC module and then merged into the power grid 14.

[0056] At the same time, each energy storage unit is divided into a liquid storage tank area, a stack area and a functional equipment area according to the spatial arrangement. The functional equipment area is arranged with various auxiliary equipment, such as a distribution box, a signal acquisition module, a BMS, a circulating pump and the like. The liquid storage tank area is arranged with positive and negative electrolyte tanks (with covers), and the tanks are arranged with capillary bundles of heat exchangers. The stack area is arranged with a stack group and a pipeline transportation system. The electrical control system includes a PCS cabinet and an energy storage system control cabinet, and the AC / DC module and a network management machine are arranged in the PCS cabinet. In this way, the energy storage system can improve the power consumption of the integrated energy system and improve the stability of power supply.

[0057] Further, the structure of the following disclosed hydrogen production equipment 4 is disclosed:

[0058] In specific applications, the hydrogen production equipment 4 may, but is not limited to, include an electrolytic tank, a gas-liquid processor, a hydrogen drying and purifier, a hydrogen storage bottle group, a rectifier cabinet and a rectifier transformer, and a control cabinet. The output end of the power transmission and distribution line of the sewage plant is connected to the power supply end of the electrolytic tank 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. In this way, the wind and solar power generation and the power grid 14 are used to supply power to the hydrogen production equipment, so as to decompose the electrolyte into hydrogen and oxygen.

[0059] Meanwhile, the gas guide pipe of the electrolytic cell is communicated with the gas-liquid processor, the gas-liquid processor separates the hydrogen and oxygen output by the gas guide pipe of the electrolytic cell, the hydrogen output end of the gas-liquid processor is connected with the gas inlet of the hydrogen drying purifier, the gas outlet of the hydrogen drying purifier is communicated with the hydrogen storage bottle group through the hydrogen film regulating valve (wherein, the hydrogen drying purifier is used for drying and purifying), and the oxygen output end of the gas-liquid processor is communicated with the oxygen supply end of the sewage treatment equipment in the sewage plant; in this way, the new energy power generation and grid hydrogen and oxygen can be used, the hydrogen can be stored to provide a hydrogen source for the surrounding area, and the oxygen is directly supplied to the sewage plant for use in the aerobic process, thereby improving the sewage treatment efficiency and saving energy.

[0060] Further, the hydrogen production equipment 4 further comprises a communication 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 communicated with the inlet of the alkali liquid filter through the communication pipe, the outlet of the alkali liquid filter is communicated with the input end of the recovery circulation pump, and the output end of the recovery circulation pump is communicated with the electrolytic cell; in this way, the electrolyte can be recovered to form a closed loop system.

[0061] Optionally, in the embodiment, the alkali tank stores alkali liquid, the input port of the water tank and the alkali tank is communicated with a deionized water tank, the output port of the alkali tank is communicated with the electrolytic cell, and the output port of the water tank is communicated with the scrubber in the gas-liquid processor through the water adding pump; based on this, the deionized water and the alkali liquid in the alkali tank are mixed to form electrolytic water, which is then delivered to the electrolytic cell as an electrolytic raw material; meanwhile, the deionized water is delivered to the scrubber in the gas-liquid processor by the water adding pump to complete the hydrogen and oxygen washing; of course, the foregoing control cabinet is responsible for the equipment operation control of the entire hydrogen production equipment 4, that is, the controlled end of each instrument in the hydrogen production equipment such as the hydrogen drying purifier, the recovery circulation pump and the water adding pump is electrically connected to complete the operation control of the instrument.

[0062] 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 of the power grid 14, the power can be adjusted in the range of 30%-110%, and the produced hydrogen is supplied to the surrounding area, and the oxygen is transported through the oxygen pipeline and the fan for use in the aerobic process of the sewage plant; specifically, the alternating current from the 10kV power transmission and distribution system of the plant is converted into direct current with a voltage matching the rated voltage of the electrolytic cell by the rectifier transformer and the rectifier cabinet, the water in the electrolyte is electrolyzed into hydrogen and oxygen in the electrolytic cell, the hydrogen from the electrolytic cell is introduced into the hydrogen liquid processor for gas-liquid separation and washing, and then enters the hydrogen drying and purifying device, and after drying and purification, it is discharged through the hydrogen film regulating valve and enters the hydrogen storage bottle group; similarly, the oxygen is directly transported to the aerobic process area of the sewage plant after gas-liquid separation and washing; then, the electrolyte in the hydrogen-oxygen separator is collected through the communication pipe, and after removing mechanical impurities by the alkali filter, it is pumped into the electrolytic cell by the recovery circulating pump to form a closed loop system; at the same time, the deionized water in the water tank and the alkali tank is injected into the hydrogen-oxygen washing device in the gas-liquid processor through the water pump, so as to separate hydrogen and oxygen.

[0063] In addition, in the present embodiment, a flame arrester is also provided, for example, the flame arrester is arranged in the equipment diffusion pipe of the hydrogen system to prevent backfire and prevent the spread of flames, and to ensure the safe production and normal gas supply of the hydrogen-oxygen station and its storage system.

[0064] After the hydrogen production equipment 4 is described, the structure of the hydrogen filling equipment 5 is provided as follows:

[0065] In the present embodiment, the hydrogen filling equipment 5 can include, but is not limited to, a loading and unloading column, a hydrogen compressor, a hydrogen filling machine, a water chilling unit, a hydrogen storage bottle group, a hydrogen storage valve group, a sequence control valve group, an instrument air storage tank, a nitrogen storage tank, a purge bus, a control system, a charging system, a supervision system, and a safety monitoring system, etc.; wherein, the hydrogen from the low-pressure hydrogen storage tank of the hydrogen production system is pressurized to 20MPa by the compressor, and then filled into the 20MPa hydrogen storage device through the filling column, and compressed by the 45MPa compressor and stored in the 45MPa hydrogen storage bottle group; when the vehicle is hydrogenated, the hydrogen is sequentially taken from the hydrogen storage bottle group through the sequence control valve group and directly filled into the vehicle; when the hydrogen demand in the station is not high, the hydrogen can be filled into the long-pipe trailer through the filling column and transported out; in addition, during the maintenance and repair of the hydrogen production equipment, the hydrogen purchased from outside can be unloaded through the unloading column and stored after compression, so as to ensure the normal operation of the hydrogen filling station.

[0066] In a specific implementation, the light storage and charging integrated parking lot 6 is a new type of photovoltaic power generation application mode of photovoltaic + charging pile + energy storage, which is an important part of the power grid 14, can be used for peak load shifting, can operate off-grid, and can improve the reliability of regional power supply. In the embodiment, the light storage and charging integrated parking lot 6 mainly includes a power grid 14, an AC / DC charging pile (i.e., the charging device described above), a photovoltaic power generation system, an energy storage system, and an energy management system. The photovoltaic carport is a component of the distributed photovoltaic power generation device 1, the energy storage demand of the charging pile is combined with the energy storage power station 3, and the automobile charging pile is connected to the 10kV power transmission and distribution system of the factory area to use new energy power generation equipment and the power grid 14 for power supply.

[0067] In a specific embodiment, the specific structure of the sewage source heat pump device 8 is provided as follows; in this embodiment, the sewage source heat pump device can be an indirect type or a direct type, which will be described separately as follows:

[0068] Alternatively, the detailed structure of the indirect type sewage source heat pump device is disclosed as follows:

[0069] For example, the indirect type sewage source heat pump device can 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 / 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 circulating pump 88, a user side circulating pump 89, an intermediate water circulating pump 810, and a reclaimed water circulating pump 811. The connection structure of the above-mentioned devices is as follows:

[0070] Referring to Figure 2 As shown in the figure, the inlet of the reclaimed water buffer tank 85 is connected to the outlet of the reclaimed water recovery device 15. The outlet of the reclaimed water buffer tank 85 is connected to the input port of the intermediate heat exchanger 84 through the reclaimed water circulating 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 heat source). The second port of the screw sewage source heat pump heating unit 81 is connected to the inlet of the sludge drying device 86 through the sludge drying heating circulating pump 88 (to deliver heat source to the sludge drying device 86 for sludge drying). Meanwhile, the outlet of the sludge drying device 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. In this way, the cold source can be recovered and delivered to the intermediate heat exchanger 84 for heat exchange.

[0071] Further, the first output port of the intermediate heat exchanger 84 is provided with the intermediate water circulating pump 810 between the first port of the screw sewage source heat pump heating unit 81, wherein the second output port of the intermediate heat exchanger 84 is provided with the intermediate water circulating pump 810 and two switching valves 87 in sequence between the first port of the screw sewage source heat pump cooling / heating switching unit 82, and the second port of the screw sewage source heat pump cooling / heating switching unit 82 is also provided with the switching valve 87 between the user side circulating pump 89.

[0072] In this way, the indirect type mainly includes three main cycles, one is the reclaimed water side cycle, which transports the treated reclaimed water from the sewage plant to the reclaimed water recovery device 15, the reclaimed water is first introduced into the reclaimed water buffer tank 85, then sent to the intermediate heat exchanger 84 for heat exchange with the heat pump unit, and then discharged; the second is the intermediate water cycle, which circulates and exchanges heat between the heat pump unit and the sewage heat exchanger by using the intermediate water as the intermediate heat medium; the third is the user side water cycle between the unit and the cooling and heating equipment 83.

[0073] Of course, the sewage source heat pump equipment 8 can also adopt a direct type water source heat pump device, wherein the requirements of the heat pump unit for anti-clogging, anti-corrosion and the like are high, but the system structure is relatively simple.

[0074] Optionally, the specific structure of the direct type water source heat pump device is provided below, that is, it includes the screw sewage source heat pump heating unit 81, the screw sewage source heat pump cooling / heating switching unit 82, the cooling and heating equipment 83, the reclaimed water buffer tank 85, the sludge drying equipment 86, the switching valve 87, the sludge drying heating circulating pump 88, the user side circulating pump 89 and the reclaimed water circulating pump 811.

[0075] Referring to Figure 3As shown, the connection structure of each of the foregoing devices is that the reclaimed water buffer tank 85 is connected to the first port of the screw sewage source heat pump heating unit 81 through the reclaimed water circulating pump 811, the second port of the screw sewage source heat pump heating unit 81 is connected to the inlet of the sludge drying device 86 through the sludge drying heat supply circulating pump 88, and the outlet of the sludge drying device 86 is connected to the third port of the screw sewage source heat pump heating unit 81; at the same time, the reclaimed water buffer tank 85 is also connected to the first port of the screw sewage source heat pump cooling / heat switching unit 82 through the reclaimed water circulating pump 811, the second port of the screw sewage source heat pump cooling / heat switching unit 82 is connected to the inlet of the cold and heat device 83 through the user side circulating pump 89, and the outlet of the cold and heat device 83 is connected to the third port of the screw sewage source heat pump cooling / heat switching unit 82; in addition, in this embodiment, two switching valves 87 are arranged in the pipeline between the reclaimed water circulating pump 811 and the first port of the screw sewage source heat pump cooling / heat switching unit 82, and the switching valve 87 is also arranged on the pipeline between the outlet of the cold and heat device 83 and the third port of the screw sewage source heat pump cooling / heat switching unit 82.

[0076] Based on this, the direct water source heat pump device includes two main cycles, one is the reclaimed water side cycle, which transports the treated reclaimed water of the sewage plant to the reclaimed water recovery device 15, and the reclaimed water is first introduced into the reclaimed water buffer tank 85 and then sent to the heat pump unit for heat exchange; the other is the user side water cycle between the unit and the cold and heat device 8-3; of course, the sewage source heat pump device 8 is connected to the 10kV power transmission and distribution system of the plant area (i.e. the aforementioned power transmission and distribution line), and hot water and chilled water are supplied to each cold and heat device 83 through the buried pipe erected in the plant area.

[0077] In specific implementation, referring to Figure 1 As shown, the embodiment also provides a wind-solar complementary street lamp 7, wherein the wind-solar complementary street lamp 7 includes a wind power generator set, a solar photovoltaic cell set, a storage battery and an inverter, the wind power generator set and the solar photovoltaic cell set are installed on a street lamp body, the wind power generator set and the solar photovoltaic cell set are electrically connected to the storage battery, the storage battery is electrically connected to a 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 converted electric energy can be stored in the storage battery by using the solar cell assembly and the wind power generator, when the street lamp is lighted at night, the inverter converts the direct current stored in the storage battery into alternating current, thereby providing power for the lamp; based on this, part of the electric load 9 demand can be met while the appearance of the plant area is improved.

[0078] In addition, in the embodiment, an energy total management device 16 is further arranged, which is used to collect energy data in the production process of the sewage plant, and perform real-time monitoring, analysis and optimization, so as to realize the optimized configuration and intelligent management and control of the energy consumption in the plant area; specifically, in the working process, the total power generation of the new energy power supply device and the total power consumption load of the sewage plant are obtained; then, according to the total power generation and the total power consumption load, the power supply strategy of the sewage plant is determined, and the new energy power supply device, the energy storage power station 3 and the power grid 14 are controlled according to the power supply strategy.

[0079] Further, the specific generation process of the foregoing power supply strategy is disclosed, that is, the operation strategy of “self-generation and self-use, and surplus power on the grid” is adopted, and specifically:

[0080] Referring to Figure 4 The energy total management device 16 is used to determine whether the total power generation is greater than or equal to the total power consumption load, wherein the energy total 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 consumption load, and perform power supply control of the sewage plant according to the first strategy.

[0081] In the embodiment, the first strategy is that the energy total management device controls the distributed photovoltaic power generation device 1 and the distributed wind power generation device 2 in the new energy power supply device to be connected to the power transmission and distribution line of the sewage plant, to supply power to the hydrogen production device 4, the hydrogenation device 5, the sewage source heat pump device 8 and the target device, and to charge the energy storage power station 3; of course, if there is surplus power, the surplus power can be connected to the power grid, that is, transmitted to the power grid 14.

[0082] Meanwhile, when the energy total management device 16 is used to determine that the total power generation is less than the total power consumption load, it is determined whether the power consumption period of the power grid 14 is in a valley power period; wherein if it is determined that the power consumption period of the power grid 14 is in a valley power period, a second strategy is generated to perform power supply control of the sewage plant according to the second strategy.

[0083] In the embodiment, the second strategy is that the energy total 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 device 1 and the distributed wind power generation device 2 to be connected to the power transmission and distribution line of the sewage plant, to supply power to the hydrogen production device 4, the hydrogenation device 5, the sewage source heat pump device 8 and the target device; specifically, the valley power is used to charge the energy storage power station 3, and then the new energy power generation device and the valley power are used to supply power to each device in the plant area.

[0084] Meanwhile, the energy total management device 16 is configured to determine whether the sum of the total power generation amount and the storage power amount of the energy storage power station 3 meets the total power consumption load when it is determined that the power consumption period of the power grid 14 is not a valley power consumption period, and generate a third strategy for power supply control of the sewage plant according to the third strategy when it is determined that the sum of the total power generation amount and the storage power amount of the energy storage power station 3 meets the total power consumption load; for example, the third strategy is that the energy total management device 16 controls the distributed photovoltaic power generation device 1, the distributed wind power generation device 2, and the energy storage power station 3 to be connected to the power transmission and distribution line of the sewage plant to supply power to the power consumption equipment of the sewage plant; in this embodiment, when the power consumption period of the power grid is not a valley power consumption period, the wind-solar power generation and the energy storage power station 3 are used to jointly supply power to the plant area to meet the total power consumption load.

[0085] In a specific implementation, the total power consumption load includes an unadjustable load and an adjustable load, wherein the unadjustable load includes power consumption load generated when the target device and the sewage source heat pump device 8 operate (i.e., production and life electric load and sewage source heat pump operation electric load), and the adjustable load is power consumption load generated when the hydrogen production device 4, the hydrogenation device 5, and the charging device in the light-storage-charging integrated parking lot 6 operate; therefore, when the energy total management device 16 is configured to determine that the sum of the total power generation amount and the storage power amount of the energy storage power station 3 does not meet the total power consumption load, a power supply strategy needs to be generated based on the adjustable load and the unadjustable load.

[0086] Specifically, it is determined whether the sum of the total power generation amount and the storage power amount of the energy storage power station 3 meets the unadjustable load; if it is determined that the sum of the total power generation amount and the storage power amount of the energy storage power station 3 does not meet the unadjustable load, a fourth strategy is generated, and power supply control of the sewage plant is performed according to the fourth strategy; the fourth strategy is that the distributed photovoltaic power generation device 1, the distributed wind power generation device 2, and the power grid are connected to the power transmission and distribution line of the sewage plant, and power supply to the hydrogen production device 4, the hydrogenation device 5, and the charging device in the light-storage-charging integrated parking lot 6 is stopped; in this way, the power supply of the unadjustable load is met first to ensure the normal operation of the sewage plant.

[0087] Of course, when it is judged that the sum of the storage power of the energy storage power station 3 and the total power generation power meets the non-adjustable load, a fifth strategy is generated, and power supply control of the sewage plant is performed according to the fifth strategy; wherein the fifth strategy is: integrating the distributed photovoltaic power generation device 1, the distributed wind power generation device 2 and the energy storage power station 3 into the power transmission and distribution line of the sewage plant, and reducing the operation power of the charging equipment in the hydrogen production device 4, the hydrogenation device 5 and the light-storage-charging integrated parking lot 6; in this embodiment, the size of the reduced power can be determined according to the difference between the sum of the storage power and the total power generation power and the corresponding power of the non-adjustable load, that is, different operation power tables are pre-set, and the operation power corresponding to different differences is stored in the table, so that data matching in the table can be performed when used.

[0088] Therefore, through the foregoing power supply strategy, the power supply mode of the sewage plant can be flexibly adjusted, so that the purpose of energy saving and emission reduction is achieved.

[0089] In addition, in this embodiment, for the municipal sewage plant, the supply and return water temperature of the heat load 10 is generally 80℃ / 50℃, and fluctuates with the season, and the fluctuation range within 24 hours per day is very small. The supply / return water temperature of the heat load 10 for winter heating is 110℃ / 50℃, and the demand fluctuates with the air temperature. Therefore, in the heating season, the heat pump needs to provide two kinds of working condition hot water; and for the cold load 11, the production and living buildings have cooling demand in summer, generally 7℃ chilled water, and the return water temperature is 12℃. A part of the heat pump unit is set as a full-year heat supply unit to provide a heat source for sludge drying, and a part is set as a cold and warm working condition switchable unit to provide heat in winter and switch to cooling condition in summer; in this way, through prediction 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 full-year heat supply unit provides 80℃ hot water to meet the production heat load demand, and the switchable unit provides 110℃ hot water to meet the heating heat load demand, and the number of units is controlled according to the demand; b. in the cooling season, the full-year heat supply unit provides 80℃ hot water to meet the production heat load demand, and the switchable unit switches to the refrigeration working condition to provide 7℃ chilled water to meet the cold load 11 demand; c. in the ordinary season, only the full-year heat supply unit is started to provide 80℃ hot water to meet the production heat load 10 demand.

[0090] Thus, through the foregoing detailed description of the comprehensive energy zero-carbon system of the urban sewage treatment plant, the utility model constructs a new power supply mode taking renewable energy as the main part and the power grid as the auxiliary part, and utilizes waste heat recovery technology to meet the cold and heat load demand, so that the power consumption of the power grid can be reduced, thereby realizing effective carbon reduction of the sewage plant production; thus, the utility model contains multiple new energy elements such as wind, light, hydrogen and storage, develops a comprehensive energy supply system based on "source-grid-load-storage", initiatively finds a new mode of new energy development in the park, and has a positive promoting effect on the diversified development of the comprehensive energy field.

[0091] Finally, it should be noted that: the above only for the preferred embodiments of the utility model, and not for limiting the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. A comprehensive energy zero-carbon system for a municipal wastewater treatment plant, characterized in that, The application relates to a sewage plant power supply system. The sewage plant power supply system comprises a new energy power supply device, sewage plant electrical equipment and a sewage source heat pump device. The new energy power supply device comprises a distributed photovoltaic power generation device (1) and a distributed wind power generation device (2), and the power grid (14) of the sewage plant, the power transmission end of the distributed photovoltaic power generation device (1) and the power transmission end of the distributed wind power generation device (2) are electrically connected to the charging end of the energy storage power station (3) in the sewage plant. The sewage plant electrical equipment comprises a hydrogen production device (4), a hydrogenation device (5), charging equipment in a light-storage-charging integrated parking lot (6), a sewage source heat pump device (8) and target equipment, and the target equipment is electrical equipment in the sewage plant except the energy storage power station (3), the hydrogen production device (4), the hydrogenation device (5), the charging equipment and the sewage source heat pump device (8). The power transmission end of the power grid (14), the energy storage power station (3), the distributed photovoltaic power generation device (1) and the distributed wind power generation device (2) is further electrically connected to the power supply end of the sewage plant electrical equipment.

2. The integrated energy zero-carbon system of a municipal wastewater treatment plant according to claim 1, wherein, The new energy power supply device serves as the main power supply of the sewage plant, and the power grid (14) and the energy storage power station (3) serve as auxiliary power supplies of the sewage plant.

3. The integrated energy zero-carbon system of a municipal wastewater treatment plant according to claim 1, wherein, The sewage source heat pump device (8) is communicated with a reclaimed water recovery device (15), reclaimed water output by the reclaimed water recovery device (15) is used as a heat source, and the sewage source heat pump device (8) serves as the heating end and the cooling end of a building in the sewage plant to provide a heat source and a refrigeration source for the building in the sewage plant.

4. The integrated energy zero-carbon system of a municipal wastewater treatment plant of claim 1, wherein, The distributed photovoltaic power generation device (1) comprises photovoltaic components and a group string type inverter. The energy storage power station (3) comprises an electric pile, an electrolyte storage tank, an electrolyte circulating pump, a battery management system, an energy storage converter and an energy management system. The electric pile is communicated with the electrolyte storage tank through the electrolyte circulating pump. The power grid is electrically connected to the input end of the energy storage converter through an alternating current circuit breaker. The output end of the energy storage converter is electrically connected to the electric pile. The hydrogen production device (4) comprises an electrolytic cell, a gas-liquid processor, a hydrogen drying purifier, 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 plant is electrically connected to the power supply end of the electrolytic cell through the rectifier transformer and the rectifier cabinet in sequence. The input end of the power transmission and distribution line is electrically connected to the power transmission end of the new energy power supply device, the power transmission end of the energy storage power station (3) and the power grid (14). The gas guide pipe of the electrolytic cell is communicated with the gas-liquid processor, the gas-liquid processor carries out gas-liquid separation on hydrogen and oxygen output by the gas guide pipe of the electrolytic cell, wherein the hydrogen output end of the gas-liquid processor is connected with the gas inlet of the hydrogen drying purifier, the gas outlet of the hydrogen drying purifier is communicated with the hydrogen storage bottle group through a hydrogen film regulating valve, and the oxygen output end of the gas-liquid processor is communicated with the oxygen supply end of the sewage treatment equipment in the sewage plant.

5. The integrated energy zero-carbon system of a municipal wastewater treatment plant according to claim 4, wherein, The hydrogen production equipment (4) further comprises a communication pipe, an alkali liquid filter and a recovery circulating pump; The liquid discharge port of the gas-liquid processor is communicated with the inlet of the alkali liquid filter through the communication pipe, the outlet of the alkali liquid filter is communicated with the input end of the recovery circulating pump, and the output end of the recovery circulating pump is communicated with the electrolytic cell.

6. The integrated energy zero-carbon system of an urban sewage treatment plant according to claim 4, characterized in that, The hydrogen production equipment (4) further comprises a water adding pump, a water tank and an alkali tank, wherein the alkali tank stores alkali liquid, the input ports of the water tank and the alkali tank are communicated with a deionized water tank, the output port of the alkali tank is communicated with the electrolytic cell, and the output port of the water tank is communicated with the scrubber in the gas-liquid processor through the water adding pump.

7. The integrated energy zero-carbon system of a municipal wastewater treatment plant of claim 1, wherein, The sewage source heat pump equipment (8) comprises an indirect water source heat pump device or a direct water source heat pump device.

8. The integrated energy zero-carbon system of a municipal wastewater treatment plant according to claim 7, wherein, The indirect water source heat pump device comprises a screw sewage source heat pump heating unit (81), a screw sewage source heat pump cold / heat switching unit (82), a cold and heat equipment (83), an intermediate heat exchanger (84), a reclaimed water buffer tank (85), a sludge drying equipment (86), a switching valve (87), a sludge drying heating circulating pump (88), a user side circulating pump (89), a intermediate water circulating pump (810) and a reclaimed water circulating pump (811). The inlet of the reclaimed water buffer tank (85) is communicated with the output port of the reclaimed water recovery device (15), wherein the outlet of the reclaimed water buffer tank (85) is communicated with the input port of the intermediate heat exchanger (84) through the reclaimed water circulating pump (811), the first output port of the intermediate heat exchanger (84) is communicated with 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 communicated with the inlet of the sludge drying equipment (86) through the sludge drying heating circulating pump (88), the outlet of the sludge drying equipment (86) is communicated with 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 communicated with the first receiving port of the intermediate heat exchanger (84). The second output port of the intermediate heat exchanger (84) is connected with the first port of the screw sewage source heat pump cold / heat switching set (82), the second port of the screw sewage source heat pump cold / heat switching set (82) is connected with the inlet of the cold and heat equipment (83) through the user side circulating pump (89), the outlet of the cold and heat equipment (83) is connected with the third port of the screw sewage source heat pump cold / heat switching set (82), and the fourth port of the screw sewage source heat pump cold / heat switching set (82) is connected with the second receiving port of the intermediate heat exchanger (84). The first output port of the intermediate heat exchanger (84) is connected with the first port of the screw sewage source heat pump heating set (81) through the intermediate water circulating pump (810), the second output port of the intermediate heat exchanger (84) is connected with the first port of the screw sewage source heat pump cold / heat switching set (82) through the intermediate water circulating pump (810) and two switching valves (87) in sequence, and the second port of the screw sewage source heat pump cold / heat switching set (82) is also connected with the user side circulating pump (89) through the switching valve (87).

9. The integrated energy zero-carbon system of a municipal wastewater treatment plant according to claim 7, wherein, The direct water source heat pump device comprises a screw sewage source heat pump heating set (81), a screw sewage source heat pump cold / heat switching set (82), a cold and heat equipment (83), a reclaimed water buffer tank (85), a sludge drying equipment (86), a switching valve (87), a sludge drying heating circulating pump (88), a user side circulating pump (89) and a reclaimed water circulating pump (811). The reclaimed water buffer tank (85) is connected with the first port of the screw sewage source heat pump heating set (81) through the reclaimed water circulating pump (811), the second port of the screw sewage source heat pump heating set (81) is connected with the inlet of the sludge drying equipment (86) through the sludge drying heating circulating pump (88), and the outlet of the sludge drying equipment (86) is connected with the third port of the screw sewage source heat pump heating set (81). The reclaimed water buffer tank (85) is also connected with the first port of the screw sewage source heat pump cold / heat switching set (82) through the reclaimed water circulating pump (811), the second port of the screw sewage source heat pump cold / heat switching set (82) is connected with the inlet of the cold and heat equipment (83) through the user side circulating pump (89), and the outlet of the cold and heat equipment (83) is connected with the third port of the screw sewage source heat pump cold / heat switching set (82). The pipeline between the reclaimed water circulating pump (811) and the first port of the screw sewage source heat pump cold / heat switching set (82) is provided with two switching valves (87), and the pipeline between the outlet of the cold and heat equipment (83) and the third port of the screw sewage source heat pump cold / heat switching set (82) is also provided with the switching valve (87).

10. The integrated energy zero-carbon system of a municipal sewage treatment plant of claim 1, wherein, Also comprising: The wind and light complementary street lamp (7) comprises a wind turbine generator set, a solar photovoltaic cell set, a storage battery and an inverter, wherein the wind turbine generator set and the solar photovoltaic cell set are installed on a street lamp body, the wind turbine generator set and the solar photovoltaic cell set are electrically connected with the storage battery, the storage battery is electrically connected with a power supply end of the street lamp body through the inverter, and the power grid (14) is electrically connected with the power supply end of the street lamp body.

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