CN212610187U - Photovoltaic and sewage treatment plant biogas combined power and heat supply system - Google Patents
Photovoltaic and sewage treatment plant biogas combined power and heat supply system Download PDFInfo
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- CN212610187U CN212610187U CN202021145497.3U CN202021145497U CN212610187U CN 212610187 U CN212610187 U CN 212610187U CN 202021145497 U CN202021145497 U CN 202021145497U CN 212610187 U CN212610187 U CN 212610187U
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Abstract
The utility model discloses a biogas combined power and heat supply system of a photovoltaic and sewage treatment plant, which comprises a photovoltaic power generation unit, a biogas generation unit and a biogas power and heat supply unit; the output end of a box-type transformer of the photovoltaic power generation unit is respectively and electrically connected with the power distribution network and a distribution box of the methane generation unit, a gas storage tank of the methane generation unit is connected with a gas boiler of the methane power supply and heat supply unit, a heat exchanger of the methane power supply and heat supply unit is connected with a heat utilization unit, and a methane power generation transformer of the methane power supply and heat supply unit is connected with the power distribution network. The advantages are that: clean power is generated through the photovoltaic power generation unit, the requirement of sewage treatment station power is met, and the high power consumption limit of the sewage treatment industry is broken; the biogas generated by the biogas generation unit is supplied to a heat supply unit and generates electricity through the biogas power supply and heat supply unit, and is complementary with the photovoltaic power generation unit in electricity, so that the electricity cost of a sewage treatment plant is effectively reduced; through the utility model discloses reduce sewage treatment plant working costs, promoted sewage treatment plant's sustainable development.
Description
The technical field is as follows:
the utility model relates to a heating power supply technical field, in particular to combined power supply and heating system for photovoltaic and sewage treatment plant biogas.
Background art:
in recent years, the speed of national urbanization is accelerated, the scale of urban population is rapidly expanded, the production amount of urban sewage is multiplied, and the requirements on the scale and the treatment capacity of urban sewage treatment plantsThe demand is also increased; the sewage treatment belongs to the energy consumption intensive industry, mainly has large power consumption, and the average level of the industry is about 0.3kWh/m3The electricity consumption can account for 50% of the whole operation cost; along with the increase of urban sewage treatment facilities, the electricity consumption of the sewage treatment plant industry is greatly improved, the proportion of the electricity consumption in the total electricity consumption of the whole society is gradually increased, and the problems of high electricity consumption, high operation cost and the like in sewage treatment are increasingly prominent; according to domestic common sewage treatment process and current common equipment, the power consumption mainly focuses on the process of sewage and sludge lifting, oxygen supply for biological treatment, sludge treatment and the like, in particular to the unit process of sewage biological treatment and sludge treatment; the sludge is used as a byproduct in the urban sewage treatment process, the yield of the sludge is continuously increased along with the increase of the sewage treatment amount, and the urban environmental sanitation is influenced and the sewage treatment development is restricted if the sludge is not stably treated due to complex components.
The utility model has the following contents:
an object of the utility model is to provide an effectively reduce sewage treatment plant power consumption and carry out the photovoltaic of efficient handling and sewage treatment plant marsh gas combined power supply heating system to mud sewage.
The utility model discloses by following technical scheme implement: the system comprises a photovoltaic and sewage treatment plant biogas combined power and heat supply system, a power supply and heat supply system and a control system, wherein the photovoltaic and sewage treatment plant biogas combined power and heat supply system comprises a photovoltaic power generation unit, a biogas power and heat supply unit, a power distribution network and a heat utilization unit; the output end of a box-type transformer of the photovoltaic power generation unit is respectively and electrically connected with the power distribution network and a distribution box of the methane generation unit, a gas storage tank of the methane generation unit is connected with a gas supply end of a gas boiler of the methane power supply and heat supply unit, a heat exchanger of the methane power supply and heat supply unit is connected with the heat utilization unit, and a methane power generation transformer of the methane power supply and heat supply unit is electrically connected with the power distribution network.
Further, the biogas power supply and heat supply unit comprises the gas boiler, a steam turbine, the heat exchanger and the biogas power generation transformer; the exhaust port of the gas boiler is communicated with the air inlet of the steam turbine, the exhaust port of the steam turbine is communicated with the steam inlet of the heat exchanger, the condensed water outlet of the heat exchanger is communicated with the gas boiler, and the steam turbine is electrically connected with the methane power generation transformer.
Further, the biogas generation unit comprises a sludge anaerobic digestion tank, a desulfurizing tower, the gas storage tank and the distribution box; and the exhaust port of the sludge anaerobic digestion tank is communicated with the air inlet of the desulfurizing tower, and the exhaust port of the desulfurizing tower is communicated with the air inlet of the air storage tank.
Further, the biogas digester also comprises a biogas compressor; and the air inlet of the biogas compressor is communicated with the air outlet of the air storage tank, and the air outlet of the biogas compressor is communicated with the sludge anaerobic digestion tank.
Furthermore, sewage outlets are arranged on pipelines at two ends of the methane compressor, pipelines at two ends of the desulfurizing tower and an outlet pipeline of the gas storage tank.
The utility model has the advantages that: the utility model provides a combined power and heat supply system for photovoltaic and sewage treatment plant biogas, firstly, a photovoltaic power generation unit is applied to a sewage treatment plant, which is effectively beneficial to solar energy resources, clean power is generated through the photovoltaic power generation unit, the power demand of the sewage treatment plant is solved, and the high power consumption limit of the sewage treatment industry is broken; secondly, the sludge sewage is effectively treated by the sewage treatment plant biogas generation unit, simultaneously generated biogas is used for power generation through the biogas power supply and heat supply unit, a combined power supply and heat supply system is formed by the biogas generation unit and the photovoltaic power generation unit, electric power complementation is realized with the photovoltaic power generation unit, the integral output effect is improved, a more stable and continuous power supply is formed, the power is supplied to the sewage treatment plant, the electric quantity purchased by an electric network is greatly reduced, and the electricity cost of a sewage treatment plant is effectively reduced; thirdly, the marsh gas can be used as a fuel for power generation, and can also be used as a heat source fuel for a heating boiler of a sewage treatment plant and a sludge heating hot water boiler; through the utility model discloses reduced sewage treatment plant working costs, promoted sewage treatment plant's sustainable development, played demonstration for national sewage treatment and led the effect, better promotion green development and ecological civilization construction.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention.
The parts in the drawings are numbered as follows: the system comprises a photovoltaic power generation unit 1, a box-type transformer 1.1, a photovoltaic assembly 1.2, an inverter 1.3, a biogas generation unit 2, a sludge anaerobic digestion tank 2.1, a desulfurizing tower 2.2, a gas storage tank 2.3, a distribution box 2.4, a biogas compressor 2.5, a sewage outlet 2.6, a biogas power supply and heat supply unit 3, a gas boiler 3.1, a steam turbine 3.2, a heat exchanger 3.3, a biogas power generation transformer 3.4, a power distribution network 4 and a heat consumption unit 5.
The specific implementation mode is as follows:
as shown in fig. 1, the biogas combined power and heat supply system for photovoltaic and sewage treatment plants comprises a photovoltaic power generation unit 1, a biogas generation unit 2, a biogas power and heat supply unit 3, a power distribution network 4 and a heat utilization unit 5; the heat utilization unit 5 comprises a heating system and a sludge heating system in a plant area of a sewage treatment plant and heat users around the plant area; the photovoltaic power generation unit 1 comprises a photovoltaic module 1.2, an inverter 1.3 and a box-type transformer 1.1, can convert solar energy into electric energy, is the prior art, and the detailed structure is not described herein again; the biogas generation unit 2 comprises a sludge anaerobic digestion tank 2.1, a desulfurizing tower 2.2, a gas storage tank 2.3 and a distribution box 2.4; the output end of a box-type transformer 1.1 of the photovoltaic power generation unit 1 is electrically connected with a distribution box 2.4 of the methane generation unit 2, and after the photovoltaic power generation unit 1 supplies power to the distribution box 2.4, all equipment needing power of the methane generation unit 2 is supplied with power through the distribution box 2.4; therefore, the photovoltaic power generation unit 1 is applied to a sewage treatment plant, solar energy resources are effectively facilitated, clean power is generated through the photovoltaic power generation unit 1, the power demand of a sewage treatment plant is met, and the high power consumption limit of the sewage treatment industry is broken; an exhaust port of the sludge anaerobic digestion tank 2.1 is communicated with an air inlet of a desulfurizing tower 2.2, and an exhaust port of the desulfurizing tower 2.2 is communicated with an air inlet of an air storage tank 2.3; sludge sewage is effectively treated by an anaerobic digestion method through a sludge anaerobic digestion tank 2.1, other byproducts such as methane and hydrogen sulfide are generated at the same time, the methane is desulfurized and purified through a desulfurizing tower 2.2, and the desulfurized methane enters a gas storage tank 2.3 for storage; the biogas generating unit 2 also comprises a biogas compressor 2.5; the air inlet of the biogas compressor 2.5 is communicated with the air outlet of the air storage tank 2.3, the air outlet of the biogas compressor 2.5 is communicated with the sludge anaerobic digestion tank 2.1, and the biogas compressor 2.5 can send part of biogas back to the sludge anaerobic digestion tank 2.1 for stirring sludge, so that the generation of biogas in the sludge anaerobic digestion tank 2.1 can be accelerated; sewage outlets 2.6 are arranged on pipelines at two ends of the biogas compressor 2.5, pipelines at two ends of the desulfurizing tower 2.2 and an outlet pipeline of the gas storage tank 2.3; after the marsh gas enters the pipeline, condensate water containing impurities can be formed due to temperature reduction, so that the condensate water containing the impurities in the pipeline can be drained in time through the sewage draining outlet 2.6, and the reduction of the impurities and the condensate water in the marsh gas is facilitated.
The output end of a box-type transformer 1.1 of the photovoltaic power generation unit 1 is also electrically connected with a power distribution network 4, and the photovoltaic power generation unit 1 can supply power to a biogas generation unit 2 of a sewage treatment plant and can also supply redundant power to the power distribution network 4; the gas storage tank 2.3 of the marsh gas generating unit 2 is connected with the gas supply end of a gas boiler 3.1 of the marsh gas power supply and heat supply unit 3; the biogas power supply and heat supply unit 3 comprises a gas boiler 3.1, a steam turbine 3.2, a heat exchanger 3.3 and a biogas power generation transformer 3.4; an exhaust port of the gas boiler 3.1 is communicated with an air inlet of the steam turbine 3.2, an exhaust port of the steam turbine 3.2 is communicated with a steam inlet of the heat exchanger 3.3, a condensate outlet of the heat exchanger 3.3 is communicated with the gas boiler 3.1, the steam turbine 3.2 is electrically connected with the biogas power generation transformer 3.4, and the biogas power generation transformer 3.4 is electrically connected with the power distribution network 4; a heat exchanger 3.3 of the marsh gas power and heat supply unit 3 is connected with a heat consumption unit 5, and a marsh gas power generation transformer 3.4 of the marsh gas power and heat supply unit 3 is connected with a power distribution network 4; hot steam generated by the gas boiler 3.1 enters a steam turbine 3.2 for power generation, and the generated power is boosted by a methane power generation transformer 3.4 and then sent to a power distribution network 4; and after the exhaust port of the steam turbine 3.2 is introduced from the steam inlet of the heat exchanger 3.3, the exhaust port exchanges heat with the return water of the heat utilization unit 5, and the exhaust port is used for meeting the heating and sludge heating requirements of a sewage treatment plant.
The power supply of the sewage treatment plant mainly adopts photovoltaic power generation, and the biogas power generation is used for supplementary regulation, so that the continuous and stable output of the power supply is ensured, and the power demand of the sewage treatment plant is met; biogas generated by a biogas generation unit 2 of a sewage treatment plant is used for power generation through a biogas power supply and heat supply unit 3, a combined power supply and heat supply system is formed with a photovoltaic power generation unit 1, electric power complementation is realized with the photovoltaic power generation unit 1, the integral output effect is improved, a more stable and continuous power supply is formed, power is supplied to the sewage treatment plant, the electric quantity purchased by a power grid is greatly reduced, and the power cost of a sewage treatment plant is effectively reduced; the daytime illumination intensity is high, the photovoltaic power generation output is high, when the photovoltaic power generation load is greater than or equal to the sewage treatment plant power load, the methane is only used for heating or heating, and the redundant methane is stored in the gas storage tank 2.3 after being subjected to desulfurization and drying treatment; at night, when the photovoltaic power generation output is low or no output is generated and the power load of a sewage treatment plant cannot be met, releasing methane from the gas storage tank 2.3, starting the steam turbine 3.2 to generate power, rapidly supplementing the shortage of the power load, and using the rest of the power to meet the heating or heating requirement of the sewage treatment plant; on the premise of ensuring the power consumption and heat demand, the redundant power is sent to the power grid to provide power for the power grid; under the condition that the system is in failure or insufficient in power, the power grid can also be used as a standby power supply to supplement power for the power supply system; the peak time of the sewage treatment plant power utilization and the peak time of the power grid power price are more in the daytime and are consistent with the peak time of photovoltaic power generation, so that the photovoltaic power generation can effectively ensure the daytime power load; the electricity consumption trough time of the sewage treatment plant is mostly at night, and the photovoltaic is small or no output is generated in the time, so that the methane power generation system can be used for meeting the night electricity consumption requirement of the sewage treatment plant, reducing the online purchased electricity quantity and effectively reducing the electricity cost of the sewage treatment plant; the utility model discloses a set up gas holder 2.3, look the photovoltaic condition of exerting oneself, select release/storage marsh gas to adjust to the power consumption load demand changes, promote clean electric power's make full use of, reduce electrical power generating system and to electric wire netting transmission electric power, reduce net purchase electric quantity and running cost.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The biogas combined power and heat supply system for the photovoltaic and sewage treatment plant is characterized by comprising a photovoltaic power generation unit, a biogas power and heat supply unit, a power distribution network and a heat utilization unit; the output end of a box-type transformer of the photovoltaic power generation unit is respectively and electrically connected with the power distribution network and a distribution box of the methane generation unit, a gas storage tank of the methane generation unit is connected with a gas supply end of a gas boiler of the methane power supply and heat supply unit, a heat exchanger of the methane power supply and heat supply unit is connected with the heat utilization unit, and a methane power generation transformer of the methane power supply and heat supply unit is electrically connected with the power distribution network.
2. The combined photovoltaic and sewage treatment plant biogas power and heat supply system according to claim 1, wherein the biogas power and heat supply unit comprises the gas boiler, a steam turbine, the heat exchanger and the biogas generator transformer; the exhaust port of the gas boiler is communicated with the air inlet of the steam turbine, the exhaust port of the steam turbine is communicated with the steam inlet of the heat exchanger, the condensed water outlet of the heat exchanger is communicated with the gas boiler, and the steam turbine is electrically connected with the methane power generation transformer.
3. The combined photovoltaic and sewage treatment plant biogas power and heating system according to claim 1 or 2, wherein the biogas generation unit comprises a sludge anaerobic digester, a desulfurizing tower, the gas storage tank and the distribution box; and the exhaust port of the sludge anaerobic digestion tank is communicated with the air inlet of the desulfurizing tower, and the exhaust port of the desulfurizing tower is communicated with the air inlet of the air storage tank.
4. The photovoltaic and sewage treatment plant biogas combined power and heat supply system according to claim 3, further comprising a biogas compressor; and the air inlet of the biogas compressor is communicated with the air outlet of the air storage tank, and the air outlet of the biogas compressor is communicated with the sludge anaerobic digestion tank.
5. The biogas combined power and heat supply system of a photovoltaic and sewage treatment plant according to claim 4, wherein sewage outlets are arranged on pipelines at two ends of the biogas compressor, pipelines at two ends of the desulfurizing tower and an outlet pipeline of the gas storage tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021145497.3U CN212610187U (en) | 2020-06-18 | 2020-06-18 | Photovoltaic and sewage treatment plant biogas combined power and heat supply system |
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| CN202021145497.3U CN212610187U (en) | 2020-06-18 | 2020-06-18 | Photovoltaic and sewage treatment plant biogas combined power and heat supply system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113800631A (en) * | 2021-09-10 | 2021-12-17 | 中国华能集团有限公司河北雄安分公司 | Comprehensive energy utilization system and method for sewage treatment plant by using solar energy |
| CN114906934A (en) * | 2022-05-27 | 2022-08-16 | 长江生态环保集团有限公司 | System and method for coupling treatment of waste gas and energy of sewage plant |
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2020
- 2020-06-18 CN CN202021145497.3U patent/CN212610187U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113800631A (en) * | 2021-09-10 | 2021-12-17 | 中国华能集团有限公司河北雄安分公司 | Comprehensive energy utilization system and method for sewage treatment plant by using solar energy |
| CN114906934A (en) * | 2022-05-27 | 2022-08-16 | 长江生态环保集团有限公司 | System and method for coupling treatment of waste gas and energy of sewage plant |
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