Multi-energy complementary low-carbon comprehensive energy supply system

Abstract

The utility model relates to a multi-energy complementary low-carbon comprehensive energy supply system which comprises a farm, a biogas digester, an internal combustion engine generator set, a waste heat boiler, a drying room, a heat pump subsystem and an auxiliary heater. A gas outlet of a heat source end of the heat pump subsystem and a biogas outlet of the biogas digester are both communicated with a gas inlet of the internal combustion engine generator set, and the internal combustion engine generator set supplies power to electric appliances in the farm; a smoke outlet of the internal combustion engine generator set communicates with a smoke inlet of the waste heat boiler, the waste heat boiler communicates with a water inlet pipe and a water outlet pipe, and the water outlet pipe provides a heat source for the farm. A smoke outlet of the waste heat boiler is communicated with a smoke inlet of the auxiliary heater, an air outlet of the cold source end of the heat pump subsystem is communicated with an air inlet of the auxiliary heater, and an air outlet of the auxiliary heater is communicated with the drying room. The system can realize integrated utilization of resource elements in a breeding area, solves the problem that energy supply and energy utilization of herdsmen in northwest remote areas are disjointed, and improves the living standard of the herdsmen in the remote areas.

Description

Technical Field

[0001] The utility model relates to the technical field of integrated energy supply, in particular to a multi-energy complementary low-carbon integrated energy supply system. Background Art

[0002] At present, the energy consumption of breeding farms still mainly relies on the large power grid for energy supply, and some of its own resources (biogas energy) have not been fully utilized. The unreasonable utilization of its excrement has also caused certain environmental pollution problems, which is not conducive to the development of low-carbon breeding. In addition, due to the incomplete coverage of power grids and pipe networks in remote areas, scientific breeding cannot be achieved in the livestock and poultry breeding industry in these areas. Not only is the breeding efficiency low, but the living quality of livestock farmers cannot be guaranteed. Therefore, a multi-energy complementary low-carbon integrated energy supply system is provided to solve the above problems. Content of the Utility Model

[0003] The utility model provides a multi-energy complementary low-carbon integrated energy supply system, which can realize the integrated utilization of resource elements in breeding areas, achieve low-carbon energy supply, and can also solve the problem of the disconnection between energy supply and consumption of herdsmen in the remote northwest regions, and improve the living standards of herdsmen in remote areas.

[0004] To achieve the above object, the utility model adopts the following technical solutions:

[0005] A multi-energy complementary low-carbon integrated energy supply system includes a breeding farm, a biogas digester, an internal combustion engine generator set, a waste heat boiler, a drying room, a heat pump subsystem and an auxiliary heater;

[0006] The above-mentioned breeding farm provides fermentation raw materials for the above-mentioned biogas digester;

[0007] The air outlet of the heat source end of the above-mentioned heat pump subsystem and the biogas outlet of the above-mentioned biogas digester are both connected to the air inlet of the above-mentioned internal combustion engine generator set, and the above-mentioned internal combustion engine generator set provides power for each electrical appliance in the above-mentioned breeding farm;

[0008] The flue gas outlet of the above-mentioned internal combustion engine generator set is connected to the flue gas inlet of the above-mentioned waste heat boiler. The above-mentioned waste heat boiler is connected with a water inlet pipe and a water outlet pipe, and the above-mentioned water outlet pipe provides heat source for the above-mentioned breeding farm;

[0009] The flue gas outlet of the above-mentioned waste heat boiler is connected to the flue gas inlet of the above-mentioned auxiliary heater, the air outlet of the cold source end of the above-mentioned heat pump subsystem is connected to the air inlet of the above-mentioned auxiliary heater, and the air outlet of the above-mentioned auxiliary heater is connected to the above-mentioned drying room to dry livestock feed.

[0010] Preferably, it further includes an air heat exchanger. The flue gas outlet of the above-mentioned auxiliary heater is connected to the flue gas inlet of the above-mentioned air heat exchanger. The air inlet of the above-mentioned air heat exchanger is connected with a first air pump, and the air outlet of the above-mentioned air heat exchanger is connected to the interior of the above-mentioned breeding farm.

[0011] Preferably, it further includes a flue gas treatment device. The flue gas outlet of the air heat exchanger is communicated with the flue gas inlet of the flue gas treatment device, and the flue gas outlet of the flue gas treatment device is communicated with the outside.

[0012] Preferably, the water outlet pipe is communicated with a heating pipe and a refrigerating machine;

[0013] The heating pipe is communicated to the inside of the farm, and the water outlet of the refrigerating machine is communicated to the inside of the farm.

[0014] Preferably, it further includes a backup power supply. The generator in the internal combustion engine generator set is electrically connected to the backup power supply and the external power grid.

[0015] Preferably, it further includes a photovoltaic power generation subsystem. The photovoltaic power generation subsystem is electrically connected to the backup power supply, various electrical appliances in the farm, and the external power grid.

[0016] Preferably, the heat pump subsystem includes a compressor, a condenser, a throttle valve, and an evaporator connected in a cycle;

[0017] The air inlet of the evaporator is communicated with a second air pump, and the air outlet of the evaporator is communicated with the air inlet of the internal combustion engine in the internal combustion engine generator set;

[0018] The air inlet of the condenser is communicated with a third air pump, and the air outlet of the condenser is communicated with the air inlet of the auxiliary heater.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] 1. Realize the resource utilization of polluting waste in the farm, achieve low-carbon farming, and use the biogas digester and internal combustion engine generator set in cooperation to achieve self-supply of energy to a certain extent, solve the problem of the disconnection between energy supply and use of herdsmen in remote areas of Northwest China, and improve the living standards of herdsmen in remote areas.

[0021] 2. Realize the coordinated and efficient energy utilization of various devices in the system. The waste heat of the flue gas is fully and cascading utilized through the waste heat boiler, auxiliary heater, and air heat exchanger, greatly increasing the heat energy utilization efficiency and realizing multi-stage heating in the factory. Description of the Drawings

[0022] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1This is the overall schematic diagram of the system in the embodiments of the present invention.

[0024] Explanation of reference numerals:

[0025] 1. Breeding farm; 2. Biogas digester; 3. Internal combustion engine generator set; 4. Waste heat boiler; 5. Drying room; 6. Auxiliary heater; 7. Air heat exchanger; 8. First air pump; 9. Heat pump subsystem; 91. Compressor; 92. Condenser; 93. Throttle valve; 94. Evaporator; 95. Second air pump; 96. Third air pump; 10. Flue gas treatment device; 11. Water inlet pipe; 12. Water outlet pipe; 13. Three-way valve; 14. Heating pipe; 15. Refrigerator; 16. Cooling pipe; 17. Backup power supply; 18. Photovoltaic power generation system; 19. External power grid. Detailed implementation manners

[0026] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0029] As Figure 1As shown in the figure, an embodiment of the present utility model provides a multi-energy complementary low-carbon integrated energy supply system, which specifically includes a farm 1, a biogas digester 2, an internal combustion engine generator set 3, a waste heat boiler 4, a drying room 5, a heat pump subsystem 9 and an auxiliary heater 6; wherein the farm 1 is used for raising livestock, and the livestock will produce excreta such as feces. The excreta enters the biogas digester 2 as fermentation raw materials to produce biogas. The generated biogas can enter the internal combustion engine generator set 3 together with air as fuel. Then, the electricity generated by the internal combustion engine generator set 3 is supplied to various electrical appliances in the farm 1 and the power grid, and is preferentially supplied to various electrical appliances in the farm 1; in order to significantly improve the combustion efficiency and performance of the biogas in the internal combustion engine of the internal combustion engine generator set 3, the air outlet of the heat source end of the heat pump subsystem 9 is connected to the air inlet of the internal combustion engine generator set 3 through a first pipeline. The temperature of the air coming out of the air outlet of the heat source end of the heat pump subsystem 9 is generally 10-15 °C lower than the outdoor air temperature. Internal combustion engine intake air cooling can significantly improve the combustion efficiency and performance of the internal combustion engine; wherein, in order to utilize the waste heat of the flue gas, the flue gas outlet of the internal combustion engine generator set 3 is connected to the flue gas inlet of the waste heat boiler 4 through a second pipeline. The waste heat boiler 4 is connected with a water inlet pipe 11 and a water outlet pipe 12. Furthermore, heat exchange occurs between the flue gas and the water entering the waste heat boiler 4 to form hot water or steam or a mixture of the two, and it can flow into the water supply pipeline in the farm 1 through the water outlet pipe 12, so as to provide domestic hot water for the farm 1 in winter or usually or heat supply in winter; in order to further utilize the waste heat of the flue gas in the waste heat boiler 4, the flue gas outlet of the waste heat boiler 4 is connected to the flue gas inlet of the auxiliary heater 6 through a third pipeline. The air outlet of the cold source end of the heat pump subsystem 9 is connected to the air inlet of the auxiliary heater 6 through a fourth pipeline. The air outlet of the auxiliary heater 6 is connected to the drying room 5 through a fifth pipeline. Usually or on rainy and cloudy days, the first air pump 8 obtains air from the outside. The air enters the cold source end of the heat pump subsystem 9, and then through heat exchange, the air is preliminarily heated, and then enters the auxiliary heater 6, where it exchanges heat with the flue gas passing through it. The flue gas further heats the air. On the one hand, it can utilize the waste heat of the flue gas, and on the other hand, it can increase the temperature of the air. The air after secondary heating enters the drying room 5 to dry livestock feed such as straw in the drying room 5. In this embodiment, the temperature after secondary heating is about 60 °C.

[0030] The technical solution composed of the above-mentioned farm 1, biogas digester 2, internal combustion engine generator set 3, waste heat boiler 4, drying room 5, heat pump subsystem 9 and auxiliary heater 6, on the one hand, realizes the resource utilization of polluting waste in the farm 1. That is, the biogas generated by fecal fermentation is used as the fuel of the internal combustion engine generator set 3. The electricity generated by the internal combustion engine generator set 3 is supplied to the internal power grid of the farm 1 and then supplied to each electricity-consuming unit through the internal power grid, achieving a certain degree of independent power supply, solving the problem of the disconnection between energy supply and use for herdsmen in remote areas of the northwest, and improving the living standards of herdsmen in remote areas. On the other hand, it realizes the full cascade utilization of flue gas waste heat through the waste heat boiler 4, auxiliary heater 6 and air heat exchanger 7, achieving multi-stage heating in the farm and improving the energy utilization rate.

[0031] Specifically, the system also includes an air heat exchanger 7. The flue gas outlet of the auxiliary heater 6 is connected to the flue gas inlet of the air heat exchanger 7 through a sixth pipeline. The air inlet of the air heat exchanger 7 is connected to a first air pump 8. The air outlet of the air heat exchanger 7 is connected to the interior of the farm 1 through a seventh pipeline. Thus, after the flue gas passes through the auxiliary heater 6, it enters the air heat exchanger 7 through the sixth pipeline. At the same time, the first air pump 8 operates to supply air into the air heat exchanger 7, where it exchanges heat with the flue gas inside. After the air is preheated, it enters the farm 1 through the seventh pipeline, providing a heat source for the farm 1. Of course, the above scenario occurs in winter or when it is necessary to increase the indoor air temperature, so as to make full use of the flue gas waste heat.

[0032] Of course, in order to make the flue gas pollution-free after passing through the air heat exchanger 7, the system also includes a flue gas treatment device 10. The flue gas outlet of the air heat exchanger 7 is connected to the flue gas inlet of the flue gas treatment device 10. The flue gas outlet of the flue gas treatment device 10 is connected to the outside. The flue gas after passing through the air heat exchanger 7 directly enters the flue gas treatment device 10. After being treated by the flue gas treatment device 10, it is then discharged to the outside, making the flue gas discharged into the outside atmosphere pollution-free and protecting the environment. Of course, the flue gas treatment device 10 in this embodiment is an existing small flue gas processor.

[0033] Specifically, to meet the heat and cold requirements in the farm 1, in this embodiment, the end of the water outlet pipe 12 is connected to a three-way valve 13. The other two ends of the three-way valve 13 are respectively connected to a heating pipe 14 and a refrigerator 15. A circulating pipeline is arranged indoors in the farm 1. The heating pipe 14 is connected to the circulating pipeline in the farm 1. The water outlet of the refrigerator 15 is connected to a cooling pipe 16, and the cooling pipe 16 is connected to the circulating pipeline in the farm 1. Specifically, when there is a large amount of heat and no useless demand in winter, the valves of the three-way valve 13 and the refrigerator 15 are closed, and hot water or steam is fully supplied for use in the farm; when there is a large demand for cold in summer and almost no demand for hot water in the farm, the valves of the three-way valve 13 and the valves in the farm are closed, and hot water or steam is fully used for refrigeration. In spring and autumn seasons when there are both heat demand and cold demand, the valve of the three-way valve 13 is fully open, but the opening degree of the three-way valve 13 can be adjusted according to the required heat and required cold.

[0034] Specifically, the system further includes a backup power supply 17. There is an internal power grid in the farm 1. The generator in the internal combustion engine generator set 3 is electrically connected to the internal power grid. The backup power supply 17, each electrical appliance in the farm 1, and the external power grid 19 are all electrically connected to the internal power grid to realize the supply of electric energy. During actual use, the electricity generated by the generator in the internal combustion engine generator set 3 simultaneously supplies power to the backup power supply 17 and each electrical appliance in the farm 1, preferentially meeting the power supply of each electrical appliance in the farm 1. Then the surplus power is supplied to the backup power supply 17, and finally supplied to the power grid to obtain benefits. The backup power supply 17 is used for energy supply when the power supply is insufficient or the internal combustion engine generator set 3 is shut down for maintenance.

[0035] Specifically, the system further includes a photovoltaic power generation subsystem 18, which is an existing photovoltaic system arranged on the roof of the farm and in idle open spaces. The photovoltaic power generation subsystem 18 is electrically connected to the internal power grid, generates electricity on sunny days, supplies energy to the farm 1, utilizes renewable energy, improves the environmental performance of the system, and realizes multiple guarantees of power for the system, improving the safety of the system.

[0036] Specifically, the heat pump subsystem 9 includes a compressor 91, a condenser 92, a throttle valve 93, and an evaporator 94 that are connected in a cycle. That is, the medium outlet of the compressor 91 is communicated with the medium inlet of the condenser 92, the medium outlet of the condenser 92 is communicated with the throttle valve 93, the throttle valve 93 is communicated with the medium inlet of the evaporator 94, and the medium outlet of the evaporator 94 is communicated with the medium inlet of the compressor 91. Moreover, the air inlet of the evaporator 94 is communicated with a second air pump 95 to supply air to the evaporator 94, and the air outlet of the evaporator 94 is communicated with the air inlet of the internal combustion engine in the internal combustion engine generator set 3 to provide cooled air for the internal combustion engine. The air inlet of the condenser 92 is communicated with a third air pump 96 to supply air to the condenser 92, and the air outlet of the condenser 92 is communicated with the air inlet of the auxiliary heater 6. The above-mentioned compressor 91, the first air pump 8, the second air pump 95, the third air pump 96, the refrigerating machine 15, the electrical equipment in the farm 1, the electrical equipment in the drying room 5, and other electrical equipment are all powered by the internal power grid.

[0037] The above embodiments are only the preferred embodiments of the present invention, and the scope of protection of the present invention cannot be limited thereby. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention belong to the scope of protection required by the present invention.

Claims

1. A multi-energy complementary low-carbon integrated energy supply system, characterized in that: It includes the farm, biogas digester, internal combustion engine generator set, waste heat boiler, drying room, heat pump subsystem and auxiliary heater; The breeding farm provides fermentation raw materials for the biogas tank; The air outlet of the heat source end of the heat pump subsystem and the biogas outlet of the biogas tank are both connected to the air inlet of the internal combustion engine generator set, and the internal combustion engine generator set provides power for various electrical appliances in the breeding farm; The flue gas outlet of the internal combustion engine generator set is connected to the flue gas inlet of the waste heat boiler, and the waste heat boiler is connected with a water inlet pipe and a water outlet pipe, and the water outlet pipe provides a heat source for the breeding farm; The flue gas outlet of the waste heat boiler is connected to the flue gas inlet of the auxiliary heater, the air outlet of the cold source end of the heat pump subsystem is connected to the air inlet of the auxiliary heater, and the air outlet of the auxiliary heater is connected to the drying room to dry livestock feed.

2. The multi-energy complementary low-carbon integrated energy supply system according to claim 1 is characterized in that: It also includes an air heat exchanger, the smoke outlet of the auxiliary heater is connected to the smoke inlet of the air heat exchanger, the air inlet of the air heat exchanger is connected to a first air pump, and the air outlet of the air heat exchanger is connected to the indoor part of the farm.

3. The multi-energy complementary low-carbon integrated energy supply system according to claim 2 is characterized in that: It also includes a flue gas treatment device, wherein the flue gas outlet of the air heat exchanger is connected to the flue gas inlet of the flue gas treatment device, and the flue gas outlet of the flue gas treatment device is connected to the outside.

4. The multi-energy complementary low-carbon integrated energy supply system according to claim 1 is characterized in that: The water outlet pipe is connected with a heating pipe and a refrigerator; The heating pipe is connected to the breeding farm, and the water outlet of the refrigerator is connected to the breeding farm.

5. The multi-energy complementary low-carbon integrated energy supply system according to claim 1 is characterized in that: It also includes a backup power supply, and the generator in the internal combustion engine generator set is electrically connected to the backup power supply and the external power grid.

6. The multi-energy complementary low-carbon integrated energy supply system according to claim 5 is characterized in that: It also includes a photovoltaic power generation subsystem, which is electrically connected to the backup power supply, various electrical appliances in the farm and an external power grid.

7. The multi-energy complementary low-carbon integrated energy supply system according to claim 1 is characterized in that: The heat pump subsystem includes a compressor, a condenser, a throttle valve and an evaporator which are cyclically connected; The air inlet of the evaporator is connected to a second air pump, and the air outlet of the evaporator is connected to the air inlet of the internal combustion engine in the internal combustion engine generator set; The air inlet of the condenser is connected to a third air pump, and the air outlet of the condenser is connected to the air inlet of the auxiliary heater.

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