CN113800631A - Comprehensive energy utilization system and method for sewage treatment plant by using solar energy - Google Patents
Comprehensive energy utilization system and method for sewage treatment plant by using solar energy Download PDFInfo
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- CN113800631A CN113800631A CN202111062528.8A CN202111062528A CN113800631A CN 113800631 A CN113800631 A CN 113800631A CN 202111062528 A CN202111062528 A CN 202111062528A CN 113800631 A CN113800631 A CN 113800631A
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- 239000010865 sewage Substances 0.000 title claims abstract description 120
- 238000000034 method Methods 0.000 title claims abstract description 14
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 96
- 238000002485 combustion reaction Methods 0.000 claims abstract description 60
- 230000005611 electricity Effects 0.000 claims abstract description 33
- 238000010438 heat treatment Methods 0.000 claims description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 43
- 239000007789 gas Substances 0.000 claims description 17
- 239000002918 waste heat Substances 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 239000000446 fuel Substances 0.000 claims description 8
- 230000001502 supplementing effect Effects 0.000 claims description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- 230000008901 benefit Effects 0.000 description 8
- 239000013589 supplement Substances 0.000 description 7
- 238000010248 power generation Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000000855 fermentation Methods 0.000 description 2
- 230000004151 fermentation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000004083 survival effect Effects 0.000 description 2
- 241001148471 unidentified anaerobic bacterium Species 0.000 description 2
- 238000009280 upflow anaerobic sludge blanket technology Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2846—Anaerobic digestion processes using upflow anaerobic sludge blanket [UASB] reactors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D15/00—Other domestic- or space-heating systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D15/00—Other domestic- or space-heating systems
- F24D15/04—Other domestic- or space-heating systems using heat pumps
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/009—Apparatus with independent power supply, e.g. solar cells, windpower, fuel cells
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/208—Off-grid powered water treatment
- Y02A20/212—Solar-powered wastewater sewage treatment, e.g. spray evaporation
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Chemical & Material Sciences (AREA)
- Water Supply & Treatment (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Biodiversity & Conservation Biology (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention provides a comprehensive energy utilization system and a comprehensive energy utilization method for a sewage treatment plant by using solar energy, wherein the system comprises the following components: a photovoltaic system, a photothermal system, an electricity using unit and a heat using unit; the photo-thermal system is connected with the heat using unit; the heat utilization unit comprises a sewage anaerobic treatment device and a heat utilization subunit; the sewage anaerobic treatment device is sequentially connected with the methane gas collecting device and the methane micro-combustion machine through pipelines, and the methane micro-combustion machine and/or the photovoltaic system are connected with the power utilization unit; the methane gas collecting device is a methane gas storage cabinet; the power utilization unit comprises a power utilization system and a charging device in a factory. The solar energy is used for a comprehensive energy utilization system of a sewage treatment plant, the floor area of an anaerobic pool and the like of the sewage treatment plant is fully utilized, and a photovoltaic system and a photothermal system are built, wherein the photovoltaic system can provide power for power utilization units such as a plant power utilization system and the like, and the photothermal system can provide heat energy for heat utilization units such as a sewage anaerobic treatment device and the like.
Description
Technical Field
The invention belongs to the technical field of comprehensive energy utilization, and relates to a comprehensive energy utilization system and method for a sewage treatment plant by using solar energy.
Background
Along with the improvement of the living standard of people, the requirement on the living environment is higher and higher, and a clean, tidy and pollution-free city can meet the increasingly improved beautiful living needs of people. The sewage treatment plant solves the problem of water pollution caused by sewage discharge, and plays a role in protecting water resources. The energy form of the original sewage treatment plant is traditionally single, the problem of insufficient utilization exists, and along with the construction of numerous sewage treatment plants, the comprehensive energy recycling efficiency and the economic benefit of the sewage treatment plant are effectively improved, so that the social attention is more and more paid.
In addition, according to different sewage sources and different treatment processes, different sewage treatment tanks are arranged in a common sewage treatment plant, and comprise an anaerobic tank, a dosing tank, a sedimentation tank and the like, so that the occupied area is large, and the area of the sewage treatment plant is fully utilized.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a comprehensive energy utilization system for a sewage treatment plant by using solar energy, which fully utilizes the occupied areas of an anaerobic tank, a dosing tank and the like of the sewage treatment plant to build a photovoltaic system and a photo-thermal system, wherein the photovoltaic system can provide electric power for power utilization units such as a plant power utilization system and the like, and the photo-thermal system can provide heat energy for heat utilization units such as a sewage anaerobic treatment device and the like, so that the comprehensive utilization of energy is realized, and the aim of saving energy is fulfilled.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
an integrated energy utilization system for a sewage treatment plant using solar energy, the system comprising: a photovoltaic system, a photothermal system, an electricity using unit and a heat using unit;
the photo-thermal system is connected with the heat using unit and provides heat energy for the heat using unit;
the heat utilization unit comprises a sewage anaerobic treatment device and a heat utilization subunit; the biogas outlet of the sewage anaerobic treatment device is communicated with the biogas inlet of the biogas gas collecting device through a pipeline, and the biogas outlet of the biogas gas collecting device is communicated with the biogas inlet of the biogas micro-combustion engine through a pipeline; the methane micro-gas turbine and/or the photovoltaic system are/is connected with the power utilization unit to provide electric energy for the power utilization unit; the methane gas collecting device is a methane gas storage cabinet;
the power utilization unit comprises a power utilization system and a charging device in a factory.
Furthermore, the charging device is a charging pile, a lithium battery storage or a lead-acid ammonium battery storage.
Furthermore, the marsh gas micro-combustion engine is connected with a heating subunit.
Furthermore, the biogas collecting device is also connected with a factory kitchen biogas stove.
Further, the sewage anaerobic treatment device is a sewage anaerobic treatment tank.
Further, the heat utilization subunit comprises a plant area heating system.
Furthermore, the plant area heating system is also communicated with a sewage source heat pump system.
Furthermore, the heat utilization subunit also comprises a plant area domestic hot water system.
Further, the sewage anaerobic treatment device is a UASB anaerobic reactor.
The invention also relates to a method for supplying energy to the comprehensive energy utilization system of the sewage treatment plant by utilizing the solar energy, which can utilize the existing area to the maximum extent and improve the comprehensive energy circulation efficiency and the economic benefit.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a solar energy is used for an energy supply method of a comprehensive energy utilization system of a sewage treatment plant, a photo-thermal system provides heat for a heat unit, and circulating water of a sewage anaerobic treatment device is heated and a plant area heating system is heated, or domestic water of the plant area and the circulating water of the sewage anaerobic treatment device are heated and the plant area heating system is heated;
circulating water of the sewage anaerobic treatment device is heated to promote organic matters in sewage to generate anaerobic reaction, one part of biogas generated by the anaerobic reaction is directly combusted as fuel of a biogas stove of a factory kitchen, the other part of biogas is collected by the biogas collecting device and then used for generating electricity by the biogas micro-combustion machine, electric energy provided by the biogas micro-combustion machine and/or electric energy provided by the photovoltaic system meet the electric quantity demand of the electricity utilization unit, and waste heat generated by the biogas micro-combustion machine and/or a sewage source heat pump system are used for supplementing the part of the photo-thermal system which is insufficient in heating for a factory heating system.
Preferably, the waste heat generated by the methane micro-combustion engine is also used for supplying heat to a plant domestic hot water system.
Compared with the prior art, the comprehensive energy utilization system for the sewage treatment plant by using the solar energy has the advantages that: through the comprehensive utilization of the energy of the sewage treatment plant, the energy utilization efficiency can be effectively improved, the enterprise cost is reduced, and the method has good economic benefit and social value. More specifically:
(1) the solar energy is used as a clean and renewable clean energy, partial power utilization requirements of a sewage treatment plant can be met by utilizing the photovoltaic system for power generation, and the power utilization cost in a plant is reduced; adopt light and heat system both can satisfy the hot water demand of plant area daily life and winter heating demand (also satisfy the demand with the heating subunit), improve staff's quality of life and reduce the cost in business, can also satisfy sewage anaerobic treatment device's heat supply demand, make sewage treatment system steady operation throughout the year. Biogas generated by fermentation of the sewage anaerobic treatment device can be used for power generation to supplement partial requirements of insufficient photovoltaic power generation capacity, and the power utilization cost in a plant is reduced. The waste heat of the methane micro-combustion engine can also be used for supplying heat by using a thermion unit (namely a plant domestic hot water system and a plant heating system) so as to supplement the problem of insufficient heat supply of a photo-thermal system.
(2) The biogas can be directly combusted and used as a kitchen fuel for catering, so that the enterprise cost is reduced.
(3) The sewage source heat pump system can also be used for supplementing the part with insufficient light and heat heating.
Compared with the prior art, the energy supply method of the comprehensive energy utilization system of the solar energy for the sewage treatment plant has the advantages similar to the advantages of the comprehensive energy utilization system of the solar energy for the sewage treatment plant, the existing area can be utilized to the maximum extent, and the comprehensive energy circulation efficiency and the economic benefit are improved.
Drawings
Fig. 1 is a flow chart of a simple structure of the preferred embodiment of the present invention.
Fig. 2 shows a situation that the photovoltaic system and the methane micro-combustion engine jointly supply power to the power utilization unit and the methane micro-combustion engine is not connected with the power utilization thermal subunit in the embodiment of the invention.
Fig. 3 shows a situation that the photovoltaic system independently supplies power to the electricity using unit and the biogas micro-combustion engine is connected with a plant heating system in the heat using subunit in the embodiment of the invention.
Fig. 4 shows a situation that the photovoltaic system independently supplies power to the electricity using unit, the biogas micro-combustion engine is connected with the heat using subunit, and the heat using subunit only comprises a plant area heating system in the embodiment of the invention.
Fig. 5 shows the methane micro-combustion engine alone supplying power to the power consumption unit in the embodiment of the invention.
Fig. 6 shows a situation that the photovoltaic system and the methane micro-combustion engine jointly supply power to the power utilization unit and the methane micro-combustion engine jointly supplies heat to the plant domestic hot water system and the plant heating system in the embodiment of the invention.
Fig. 7 shows the situation that the biogas micro-combustion engine independently supplies power to the electricity-using unit and simultaneously supplies heat to the plant heating system in the heat-using subunit in the embodiment of the invention.
Reference numerals:
1-a photovoltaic system; 2-photothermal systems; 3-service area power utilization system; 4-a charging device; 5-sewage anaerobic treatment device; 6-factory domestic hot water system; 7-a plant heating system; 8-a biogas collecting device; 9-methane micro-combustion engine; 10-a factory kitchen methane stove; 11-a sewage source heat pump system; 100-a power utilization unit; 200-heat using unit; 2001-use a thermal subunit.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1 to 7, an integrated energy utilization system for a sewage treatment plant using solar energy includes a photovoltaic system 1, a photothermal system 2, a power using unit 100, and a heat using unit 200. The output end of the photo-thermal system 2 is connected with the heat using unit 200 to provide heat energy for the heat using unit; the thermal unit 200 includes a sewage anaerobic treatment device 5 and a thermal subunit 2001 (here, the thermal subunit 2001 is a general term for other components in the thermal unit 200 except the sewage anaerobic treatment device 5); the biogas outlet of the sewage anaerobic treatment device 5 is communicated with the biogas inlet of the biogas collecting device 8 through a pipeline, and the biogas outlet of the biogas collecting device 8 is communicated with the biogas inlet of the biogas micro-combustion engine 9 through a pipeline. The marsh gas collecting device 8 is a marsh gas storage cabinet. The output end of the biogas micro-combustion engine 9 can be independently connected with a power interface (as shown in fig. 2) of the power utilization unit 100 to provide electric energy (i.e. electric power) for the power utilization unit; or, the output end of the biogas micro-combustion engine 9 and the output end of the photovoltaic system 1 may be both connected to a power interface of the electricity-using unit 100 (as shown in fig. 1), so as to supplement the electricity shortage provided by the photovoltaic system to the electricity-using unit; alternatively, only the output end of the photovoltaic system 1 may be connected to the power interface of the power consumption unit 100 (as shown in fig. 3 and 4) to supply power to the power consumption unit. The power unit 100 includes a factory floor power system 3 and a charging device 4.
The photo-thermal system 2 is connected with the sewage anaerobic treatment device 5 in the heat using unit 200, and particularly, the output end (high-temperature medium outlet) of the photo-thermal system 2 is communicated with the inlet of a heat exchange channel of circulating water of the sewage anaerobic treatment device 5, so that the temperature of the sewage anaerobic treatment device reaches the survival temperature of anaerobic bacteria by heating the circulating water of the sewage anaerobic treatment device, and the organic matter is anaerobically fermented to generate methane to achieve the effect of treating sewage. The biogas outlet of the sewage anaerobic treatment device 5 is connected with the biogas inlet of the biogas collecting device 8, and the biogas collecting device can be used for storing biogas generated by the sewage anaerobic treatment device. The biogas outlet of the biogas collecting device 8 is connected with the biogas inlet of the biogas micro-combustion engine 9, and the biogas micro-combustion engine can utilize the biogas collected by the biogas collecting device as a raw material to generate electricity.
In the embodiment of the present invention, it should be noted that the power unit 100 includes the factory floor power system 3 and the charging device 4, but is not limited to the factory floor power system 3 and the charging device 4, and may be any other equipment and system with power demand in a sewage treatment plant. The charging device 4 can be any device with the functions of electricity storage and energy storage, such as a charging pile, a lithium battery storage or a lead-acid ammonium battery storage, and the like, wherein the charging pile is preferred. The output end of the photovoltaic system 1 is connected with the power interface of the plant power system 3, and the output end of the methane micro-gas turbine 9 is connected with the power interface of the plant power system 3, so that power can be supplied to a plant; the output end of the photovoltaic system 1 is connected with a power interface of the charging device 4 (such as a charging pile), the output end of the methane micro-combustion engine 9 is connected with the power interface of the charging device 4, and the methane micro-combustion engine and the charging pile can also provide charging power for the electric vehicle. Generally speaking, the plant area power utilization system 3 of the sewage treatment plant comprises medium-pressure high-power equipment, mainly a blower and the like, and also comprises low-pressure low-power equipment, including a stirrer, a water pump, an electric valve and the like.
In some embodiments of the present invention, the biogas micro-combustion engine 9 may be separately connected to the heat using subunit 2001 (as shown in fig. 3 and fig. 4) (in this case, the biogas micro-combustion engine 9 is not connected to the electricity using unit, and only the photovoltaic system is connected to the electricity using unit), and the waste heat generated by the biogas micro-combustion engine is used as a supplement for the part of the photo-thermal system that is insufficient in heat energy provided by the heat using subunit. In other embodiments of the present invention, the biogas micro-combustion engine 9 can be connected to the power interface of the electricity unit 100 and the heat using subunit 2001 (as shown in fig. 1 and 7), and can simultaneously achieve the purpose of supplying power to the electricity unit and supplying heat to the heat using subunit.
In some embodiments of the present invention, the biogas outlet of the biogas collecting device 8 can be connected (specifically, connected by pipeline) to a factory kitchen biogas range 10 to provide fuel for a kitchen. The marsh gas collecting device 8 can be any container or device with marsh gas storage and energy supply, besides the marsh gas storage cabinet, also can be a marsh gas storage tank, a marsh gas storage bag, etc.
In the embodiment of the present invention, the anaerobic sewage treatment device 5 may be any reactor capable of performing anaerobic sewage treatment in a sewage treatment plant such as an anaerobic sewage treatment tank, for example, a UASB anaerobic reactor (i.e., an upflow anaerobic sludge blanket), an ic (internal circulation) reactor (i.e., an internal circulation anaerobic reactor), and the like.
In the embodiment of the present invention, the heating subunit 2001 may be any other device or system requiring heat energy in the sewage treatment plant except the sewage anaerobic treatment device 5. The heat using subunit 2001 may be a plant heating system 7, a heat medium inlet of the plant heating system 7 is communicated with an output end of the photothermal system 2, a heat medium inlet of the plant heating system 7 is communicated with a waste heat output end of the biogas micro-combustion engine 9 (as shown in fig. 4), and both the photothermal system and the biogas micro-combustion engine can provide heating for the plant in winter. Furthermore, in order to ensure the heating effect, the plant heating system 7 may further be communicated with a sewage source heat pump system 11 (as shown in fig. 1-6), specifically, a heat medium inlet of the plant heating system 7 is communicated with a hot water outlet of the sewage source heat pump system 11, so that the sewage source heat pump system can also provide heating for the winter of the plant, and the purpose of supplementing the heating of the sewage source heat pump system and the methane micro-combustion engine as the heating of the photo-thermal system is achieved.
In the embodiment of the present invention, for example, the heat using subunit 2001 may further include a plant-based domestic hot water system 6, and the plant-based domestic hot water system 6 is connected to the photothermal system 2 (as shown in fig. 1-3, fig. 5, and fig. 6), specifically, a heat medium input end of the plant-based domestic hot water system 6 is communicated with an output end of the photothermal system 2, so that the photothermal system can provide hot water for the plant.
A method for using solar energy as described above for the energy supply of an integrated energy utilization system of a sewage treatment plant, which method can be implemented as follows: the photothermal system 2 provides heat for the heat using unit 200, and when the heat using unit 200 includes both the sewage anaerobic treatment device 5 and the plant heating system 7, the circulating water of the sewage anaerobic treatment device 5 is heated and the plant heating system 7 is heated (as shown in fig. 4); or, when the thermal unit 200 comprises the sewage anaerobic treatment device 5, the plant domestic hot water system 6 and the plant heating system 7, the plant domestic water and the circulating water of the sewage anaerobic treatment device 5 are heated and the plant heating system 7 is heated (as shown in fig. 1-3, fig. 5 and fig. 6); circulating water of the sewage anaerobic treatment device 5 is heated to promote organic matters in sewage to generate anaerobic reaction, one part of biogas generated by the anaerobic reaction is directly combusted as fuel of a factory kitchen biogas stove 10, the other part of biogas is collected by a biogas gas collecting device 8 and then is used for generating electricity by a biogas micro-combustion engine 9, electric energy provided by the biogas micro-combustion engine 9 and/or electric energy provided by a photovoltaic system 1 meet the electric quantity requirement of an electricity utilization unit 100, and waste heat generated by the biogas micro-combustion engine 9 and/or a sewage source heat pump system 11 are used for supplementing the part of the photo-thermal system 2 which is insufficient for heating a factory heating system 7.
It should be noted here that the electric energy provided by the biogas micro-combustion engine 9 provides power for the power consumption unit 100, or the biogas micro-combustion engine 9 and the photovoltaic system 1 together provide power for the power consumption unit 100, or the photovoltaic system 1 alone provides power for the power consumption unit 100, which may be the case. Specifically, which kind of situation is adopted, the electricity consumption of the electricity utilization unit 100 and the matching degree of the electricity provided by the methane micro-combustion engine 9 and the photovoltaic system 1 need to be combined for selection, and when the electricity provided by the photovoltaic system 1 can meet the electricity utilization requirement of the electricity utilization unit 100 alone, the methane micro-combustion engine 9 is not started for supplying electricity; when the electricity demand of the electricity utilization unit 100 is equal to or less than the electricity which can be provided by the methane micro-combustion engine 9, the methane micro-combustion engine 9 can be independently started to supply electricity; and when the power demand of the power consumption unit 100 is greater than the power supply quantity of the photovoltaic system 1, is much greater than the power supply quantity that the methane micro-gas turbine 9 can provide, and is less than the sum of the power supply quantities of the photovoltaic system 1 and the methane micro-gas turbine 9, the photovoltaic system 1 and the methane micro-gas turbine 9 can be started simultaneously to supply power to the power consumption unit 100, and the power supply quantity of the methane micro-gas turbine 9 can be used as the supplement of the power supply of the photovoltaic system 1.
As an alternative embodiment, the waste heat generated by the biogas micro-combustion engine 9 can also be used to supply heat to the plant-based domestic hot water system 6 (as shown in fig. 6), so as to meet the demand of heating and realize the maximum utilization of energy.
For a better understanding of the present invention, a preferred embodiment of the present invention is provided below with reference to the accompanying drawings, wherein:
as shown in fig. 1, a comprehensive energy utilization system using solar energy for a sewage treatment plant comprises a photovoltaic system 1, a photo-thermal system 2, a plant power system 3, a charging device 4, a sewage anaerobic treatment device 5, a plant domestic hot water system 6, a plant heating system 7, a biogas collecting device 8, a biogas micro-combustion machine 9, a plant kitchen biogas stove 10 and a sewage source heat pump system 11. Wherein: charging device 4 selects to fill electric pile, and sewage anaerobic treatment device 5 selects the sewage anaerobic treatment pond.
The output end of the photovoltaic system 1 is connected with a power interface of the power utilization system 3 of the plant area to provide power for the plant area; the output end of the photovoltaic system 1 is connected with a power interface of the charging device 4 to provide a charging power supply for the electric vehicle.
The output end of the photo-thermal system 2 is communicated with a heat medium inlet of a factory domestic hot water system 6 to heat factory domestic water and provide hot water for a factory. The output end of the photo-thermal system 2 is communicated with a heat medium inlet of a plant heating system 7, and heating is provided for the plant in winter. A heating medium inlet of the plant heating system 7 is communicated with a hot water outlet of the sewage source heat pump system 11, and the sewage source heat pump system 11 can also provide heating for the plant in winter. The output end of the photo-thermal system 2 is communicated with the inlet of a circulating water heat channel of the sewage anaerobic treatment device 5, the temperature of the anaerobic tank reaches the survival temperature of anaerobic bacteria by heating the circulating water of the sewage anaerobic treatment tank, and organic matters are fermented in an anaerobic manner to generate biogas so as to achieve the effect of treating sewage.
The biogas outlet of the sewage anaerobic treatment device 5 is communicated with a biogas inlet of a biogas collecting device 8, the biogas collecting device 8 is used for storing biogas generated by the sewage anaerobic treatment device, and the biogas collecting device 8 is preferably a biogas storage cabinet.
Wherein, the marsh gas outlet of the marsh gas collecting device 8 is communicated with the marsh gas inlet of the marsh gas micro-combustion engine 9, and the marsh gas micro-combustion engine utilizes marsh gas as raw material to generate electricity. The output end of the biogas micro-combustion engine 9 is connected with a power interface of the power utilization system 3 of the plant area to provide power for the plant area; the output end of the marsh gas micro-combustion engine 9 is connected with a power interface of the charging device 4 to provide a charging power supply for the electric vehicle. The waste heat exchange output end of the biogas micro-combustion engine 9 is communicated with a heat medium inlet of the plant heating system 7, and waste heat generated by the biogas micro-combustion engine provides heating for the plant in winter. The biogas outlet of the biogas collecting device 8 is also communicated with the biogas inlet of a biogas stove 10 of a factory kitchen through a pipeline to provide fuel for the kitchen.
When the solar heating system is used, the photovoltaic system 1 provides power for the plant power system 3 and the charging device 4, the photo-thermal system 2 provides heat for the plant domestic hot water system 6, the sewage anaerobic treatment device 5 and the plant heating system 7, the plant domestic water and the circulating water of the sewage anaerobic treatment device 5 are heated, and the plant heating system 7 is heated; circulating water of the sewage anaerobic treatment device 5 is heated to promote organic matters in sewage to generate anaerobic reaction, one part of biogas generated by the anaerobic reaction is directly combusted as fuel of a factory kitchen biogas stove 10, the other part of biogas is collected by a biogas gas collecting device 8 and then is used for generating electricity by a biogas micro-combustion engine 9, electric energy provided by the biogas micro-combustion engine 9 is used as supplement of electric energy provided by a photovoltaic system 1 to supply power for a factory electric system 3 and a charging pile, and waste heat generated by the biogas micro-combustion engine 9 and a sewage source heat pump system 11 are used for supplementing the part of the photo-thermal system 2 which is insufficient for a factory heating system 7.
According to the invention, the photovoltaic system is used for generating electricity, so that partial electricity utilization requirements of a sewage treatment plant can be met, and the electricity utilization cost in a plant is reduced; adopt light and heat system both can satisfy the hot water demand of plant area daily life and winter heating demand, improve staff's quality of life and reduce the cost of enterprise, can also satisfy sewage anaerobic treatment device heat supply demand, make sewage treatment system steady operation throughout the year. Biogas generated by fermentation of the sewage anaerobic treatment device can be used for power generation to supplement partial requirements of insufficient photovoltaic power generation capacity and reduce power consumption cost in a plant; the biogas can be directly combusted and used as a kitchen fuel for catering, so that the enterprise cost is reduced; the methane micro-combustion engine waste heat and the sewage source heat pump can be used for supplementing the part with insufficient light and heat supply.
Through the comprehensive utilization of the energy of the sewage treatment plant, the energy utilization efficiency can be effectively improved, the enterprise cost is reduced, and the method has good economic benefit and social value.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A comprehensive energy utilization system of solar energy for a sewage treatment plant, comprising: a photovoltaic system (1), a photothermal system (2), an electrical unit (100) and a thermal unit (200);
the photo-thermal system (2) is connected with the heat using unit (200) and provides heat energy for the heat using unit (200);
the heat using unit (200) comprises a sewage anaerobic treatment device (5) and a heat using subunit (2001); a biogas outlet of the sewage anaerobic treatment device (5) is communicated with a biogas inlet of a biogas gas collecting device (8) through a pipeline, and a biogas outlet of the biogas gas collecting device (8) is communicated with a biogas inlet of a biogas micro-combustion engine (9) through a pipeline; the methane micro-combustion engine (9) and/or the photovoltaic system (1) are/is connected with the electricity utilization unit (100) to provide electric energy for the electricity utilization unit (100); the methane gas collecting device (8) is a methane gas storage cabinet;
the power utilization unit (100) comprises a plant power utilization system (3) and a charging device (4).
2. The comprehensive energy utilization system for a sewage treatment plant according to claim 1, wherein the charging device (4) is a charging pile, a lithium battery storage or a lead-acid ammonium battery storage.
3. The integrated energy utilization system for a sewage treatment plant according to claim 1, characterized in that a biogas micro-combustion engine (9) is connected with a thermal subunit (2001).
4. The comprehensive energy utilization system for a sewage treatment plant according to claim 1, wherein the biogas collecting device (8) is further connected with a factory kitchen biogas cooker (10).
5. The integrated energy utilization system for a sewage treatment plant according to claim 1, wherein the anaerobic sewage treatment apparatus (5) is an anaerobic sewage treatment tank.
6. The integrated energy utilization system for a sewage treatment plant according to solar energy of any of claims 1 to 5, characterized in that the heat using subunit (2001) comprises a plant area heating system (7).
7. The integrated energy utilization system for a sewage treatment plant according to claim 6, characterized in that the plant area heating system (7) is further connected with a sewage source heat pump system (11).
8. The integrated energy utilization system for a sewage treatment plant according to solar energy of claim 7, characterized in that said heat using subunit (2001) further comprises a plant area domestic hot water system (6).
9. A method for using solar energy according to any one of claims 1 to 8 for energy supply of an integrated energy utilization system of a sewage treatment plant, characterized in that the photothermal system (2) provides heat for the heat using unit (200), heats circulating water of the anaerobic sewage treatment plant (5) and provides heat for the plant heating system (7), or heats domestic water of the plant and circulating water of the anaerobic sewage treatment plant (5) and provides heat for the plant heating system (7);
circulating water of the sewage anaerobic treatment device (5) is heated to promote organic matters in sewage to generate anaerobic reaction, one part of biogas generated by the anaerobic reaction is directly combusted as fuel of a factory kitchen biogas stove (10), the other part of biogas is collected by the biogas gas collecting device (8) and then is used for generating power by the biogas micro-combustion engine (9), electric energy provided by the biogas micro-combustion engine (9) and/or electric energy provided by the photovoltaic system (1) meet the electric quantity requirement of the power unit (100), and waste heat generated by the biogas micro-combustion engine (9) and/or a sewage source heat pump system (11) are used for supplementing the part of the photo-thermal system (2) which is insufficient in heating for the factory heating system (7).
10. The method for the energy supply of the integrated energy utilization system of a sewage treatment plant according to claim 9, characterized in that the waste heat generated by the biogas micro-combustion engine (9) is also used for supplying heat to the domestic hot water system (6) of the plant.
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