Geothermal and biomass coupled heating system

Abstract

The utility model provides a geothermal and biomass coupled heating system. The geothermal and biomass coupled heating system comprises a geothermal heating unit and a biomass heating unit. The geothermal heating unit is connected with the geothermal well and provided with a water inlet pipeline and a water return pipeline, and the water inlet pipeline and the water return pipeline of the geothermal heating unit are connected with the heating system. The biomass heating unit is provided with a heating pipeline, the water outlet end of the heating pipeline is connected with the water inlet pipeline, the water inlet end of the heating pipeline is connected with the water return pipeline, and the biomass heating unit can convert biomass energy into heat energy so as to assist the geothermal heating unit to jointly supply heat to the heating system. According to the geothermal and biomass coupled heating system, the biomass heating unit cooperates with the geothermal heating unit to jointly supply heat to the heating system, the heating system can adapt to the heating peak, meanwhile, power consumption can be reduced, energy is saved, the environment is protected, and practicability is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of heating systems, and in particular relates to a heating system coupled with geothermal energy and biomass. Background Art

[0002] Geothermal energy refers to the heat energy inside the earth. It is a renewable energy source that is clean, renewable and stable. This energy can be converted into usable heat or electricity. Geothermal energy is usually used directly in heating systems, and the extraction of geothermal energy is achieved through heat exchange with the heating system.

[0003] In the prior art, when geothermal energy is used in heating systems, there will be peak and low peak heating. The peak heating period is usually at night, when auxiliary equipment such as high-temperature heat pumps are needed for coordinated heating. However, the use of high-temperature heat pumps will inevitably consume electricity. Biomass (such as agricultural waste, forestry byproducts, etc.) can be converted into combustible gas under certain conditions. Therefore, how to couple geothermal energy with biomass is a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0004] The embodiment of the utility model provides a geothermal and biomass coupled heating system, aiming to achieve the purpose of coupling geothermal energy and biomass and applying them to the heating system at the same time.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: to provide a geothermal and biomass coupled heating system, including:

[0006] A geothermal heating unit is connected to the geothermal well and has a water inlet pipeline and a water return pipeline, wherein the water inlet pipeline and the water return pipeline of the geothermal heating unit are connected to the heating system;

[0007] The biomass heating unit has a heating pipeline, the water outlet of the heating pipeline is connected to the water inlet pipeline, and the water inlet of the heating pipeline is connected to the return water pipeline. The biomass heating unit is used to convert biomass energy into thermal energy to assist the geothermal heating unit in heating the heating system.

[0008] In a possible implementation, the biomass heating unit includes:

[0009] Biomass gasifiers, used to convert biomass into combustible gas;

[0010] The gas-fired hot water boiler is connected to the biomass gasification furnace and is used for receiving the transmitted combustible gas and burning the combustible gas; the heating pipeline is located in the gas-fired hot water boiler.

[0011] In a possible implementation, the geothermal and biomass coupled heating system also includes a hot water storage tank having a water inlet and a water outlet; the water inlet of the hot water storage tank is connected to the water outlet end of the heating pipeline, and the water outlet of the hot water storage tank is connected to the water inlet pipeline.

[0012] In a possible implementation, a first valve is provided between the water inlet of the heat storage tank and the water outlet of the heating pipeline; a second valve is provided between the water outlet of the heating pipeline and the water inlet pipeline; and a third valve is provided between the water outlet of the heat storage tank and the water inlet pipeline.

[0013] In a possible implementation, a delivery pump is provided between the water inlet end of the heating pipeline and the water return pipeline.

[0014] In a possible implementation, the heat storage tank is further provided with an auxiliary pipeline, the auxiliary pipeline is respectively connected to the heat storage tank and the return pipeline; and a fourth valve is provided on the return pipeline.

[0015] In this implementation, the biomass heating unit can convert biomass energy into thermal energy, and is connected to the heating system through the water inlet pipe and the return pipe. It can cooperate with the geothermal heating unit to supply heat to the heating system, which can adapt to the peak of heating. At the same time, it can reduce electricity consumption, save energy and protect the environment, and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of the geothermal and biomass coupled heating system provided in the embodiment of the utility model Figure 1 ;

[0017] Figure 2 A schematic diagram of the structure of the geothermal and biomass coupled heating system provided in the embodiment of the utility model Figure 2 ;

[0018] Description of reference numerals:

[0019] 10. Geothermal heating unit; 11. Heat exchanger; 12. Water inlet pipeline; 13. Water return pipeline;

[0020] 20. Biomass heating unit; 21. Biomass gasification furnace; 22. Gas hot water boiler; 23. Second valve; 23. Heating pipeline; 24. Delivery pump;

[0021] 30. hot water storage tank; 31. first valve; 32. third valve; 33. auxiliary pipeline; 34. fourth valve;

[0022] 40. Heating system. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] See also Figure 1 , the geothermal and biomass coupled heating system 40 provided by the utility model is now described. The geothermal and biomass coupled heating system 40 includes a geothermal heating unit 10 and a biomass heating unit 20. The geothermal heating unit 10 is connected to the geothermal well, and has an inlet pipe 12 and a return pipe 13. The inlet pipe 12 and the return pipe 13 of the geothermal heating unit 10 are connected to the heating system 40. The biomass heating unit 20 has a heating pipe 23, the outlet end of the heating pipe 23 is connected to the inlet pipe 12, and the inlet end of the heating pipe 23 is connected to the return pipe 13. The biomass heating unit 20 can convert biomass energy into thermal energy to assist the geothermal heating unit 10 in heating the heating system 40.

[0025] Compared with the prior art, the geothermal and biomass coupled heating system 40 provided in this embodiment has a biomass heating unit 20 that can convert biomass energy into thermal energy, and is connected to the heating system 40 through a water inlet pipe 12 and a water return pipe 13, and can cooperate with the geothermal heating unit 10 to supply heat to the heating system 40, which can adapt to heating peaks, and at the same time can reduce electricity consumption, save energy and protect the environment, and has strong practicality.

[0026] In some embodiments, the biomass heating unit 20 may be used as follows: Figure 1 See the structure shown. Figure 1 The biomass heating unit 20 includes a biomass gasifier 21 and a gas-fired hot water boiler 22. The biomass gasifier 21 can convert biomass into combustible gas. The gas-fired hot water boiler 22 is connected to the biomass gasifier 21, and can receive the combustible gas transmitted therefrom and burn the combustible gas. The heating pipeline 23 is located in the gas-fired hot water boiler 22.

[0027] The biomass gasifier 21 can convert biomass into combustible gases, which can be used directly as fuel. Compared with directly burning biomass, the energy conversion efficiency is higher. In addition, biomass absorbs carbon dioxide in the atmosphere during its growth. The energy generated by the biomass gasifier 21 is essentially to release the previously absorbed carbon dioxide back into the atmosphere. This process does not increase carbon emissions, promotes the effective use of resources, and is in line with the goals of sustainable development and environmental protection. The synthesis gas of the biomass gasifier 21 mainly contains carbon monoxide, hydrogen and a small amount of carbon dioxide. These components can be further converted into liquid fuels to increase the economic value of carbon.

[0028] In addition, the byproduct charcoal produced by the biomass gasifier 21 can be made into machine-made charcoal after further carbonization and activation. The machine-made charcoal is a specially treated activated carbon with high porosity and surface area, which can absorb harmful substances and odors and can be used in the fields of air purification, water treatment, metal extraction, etc. The structure of the biomass gasifier 21 is prior art and will not be described in detail here.

[0029] The gas hot water boiler 22 can receive this part of the combustible gas and burn the combustible gas to heat the heating pipe 23, thereby heating the water in the heating pipe 23. The structure of the gas hot water boiler 22 is also prior art and will not be described in detail here.

[0030] The biomass heating unit 20 can ensure that the biomass is converted into thermal energy for hot water supply. This method can effectively ensure the utilization of biomass, save energy and protect the environment, and at the same time avoid the consumption of electric energy during the peak of heating, which is highly practical.

[0031] In some embodiments, see Figure 2 The geothermal and biomass coupled heating system 40 further includes a hot water storage tank 30, which has a water inlet and a water outlet. The water inlet of the hot water storage tank 30 is connected to the water outlet of the heating pipeline 23, and the water outlet of the hot water storage tank 30 is connected to the water inlet pipeline 12.

[0032] In the daytime, when the heating demand of users is not high, the gas hot water boiler 22 can be shut down. However, the biomass gasification furnace 21 needs to work continuously, so a pressure vessel is needed to contain the combustible gas. The number of pressure vessels required may be large, and they take up space. Safety is also a very important issue. Therefore, a heat storage tank 30 is set up. The heat storage tank 30 can ensure that the heating pipeline 23 is still heated during the day. At the same time, the heated hot water is introduced into the heat storage tank 30 for storage. Then, during the peak heating period at night, it is transferred to the water inlet pipeline 12 through the water outlet for coordinated heat supplement. This structure can also adapt to the situation of insufficient geothermal energy and biomass production capacity at night, and is highly practical.

[0033] In some embodiments, the above-mentioned hot water storage tank 30 can be used as follows Figure 2 See the structure shown. Figure 2 A first valve 31 is provided between the water inlet of the heat storage tank 30 and the water outlet of the heating pipeline 23. A second valve 23 is provided between the water outlet of the heating pipeline 23 and the water inlet pipeline 12. A third valve 32 is provided between the water outlet of the heat storage tank 30 and the water inlet pipeline 12.

[0034] In this embodiment, when the heating demand is low during the day, geothermal energy can be directly used for heating. At this time, the first valve 31 is opened, and the second valve 23 and the third valve 32 are closed, so that the low-temperature water in the return pipe 13 is introduced into the hot water storage tank 30 for storage after being heated by the heating pipe 23. When the heating is at its peak at night, the first valve 31 is closed, and the second valve 23 and the third valve 32 are opened at the same time, so that the geothermal energy, the heating pipe 23 and the hot water storage tank 30 simultaneously transport hot water to the water inlet pipe 12, which can effectively meet the heating demand and ensure the full and scientific use of heat.

[0035] In some embodiments, the connection between the heating pipeline 23 and the return water pipeline 13 can be achieved by Figure 2 See the structure shown. Figure 2 A delivery pump 24 is provided between the water inlet end of the heating pipeline 23 and the return pipeline 13. The provision of the delivery pump 24 can ensure that the water in the return pipeline 13 is introduced into the heating pipeline 23, thereby ensuring the circulation of water.

[0036] In some embodiments, the above-mentioned hot water storage tank 30 can be used as follows Figure 2 See the structure shown. Figure 2 The heat storage tank 30 is also provided with an auxiliary pipeline 33, which is respectively connected to the heat storage tank 30 and the return pipeline 13. A fourth valve 34 is provided on the return pipeline 13.

[0037] The outdoor temperature is high in some time periods, the amount of biomass is limited, and there is no need to use the hot water storage tank 30 for auxiliary heating. After being left idle for a long time, the water temperature in the hot water storage tank 30 may decrease and be close to the water temperature in the return pipe. At this time, after opening the fourth valve 34, a circulation loop is formed through the auxiliary pipeline 33, the return pipeline 13, the heating pipeline 23 and the hot water storage tank 30 to ensure that the water in the hot water storage tank 30 is supplemented with heat through the heating pipeline 23.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A geothermal and biomass coupled heating system, characterized in that: include: A geothermal heating unit is connected to the geothermal well and has a water inlet pipeline and a water return pipeline, wherein the water inlet pipeline and the water return pipeline of the geothermal heating unit are connected to the heating system; The biomass heating unit has a heating pipeline, the water outlet of the heating pipeline is connected to the water inlet pipeline, and the water inlet of the heating pipeline is connected to the return water pipeline. The biomass heating unit is used to convert biomass energy into thermal energy to assist the geothermal heating unit in heating the heating system.

2. The geothermal and biomass coupled heating system according to claim 1, characterized in that: The biomass heating unit comprises: Biomass gasifiers, used to convert biomass into combustible gas; The gas-fired hot water boiler is connected to the biomass gasification furnace and is used for receiving the transmitted combustible gas and burning the combustible gas; the heating pipeline is located in the gas-fired hot water boiler.

3. The geothermal and biomass coupled heating system according to any one of claims 1 to 2, characterized in that: The geothermal and biomass coupled heating system also includes a hot water storage tank having a water inlet and a water outlet; the water inlet of the hot water storage tank is connected to the water outlet end of the heating pipeline, and the water outlet of the hot water storage tank is connected to the water inlet pipeline.

4. The geothermal and biomass coupled heating system according to claim 3, characterized in that: A first valve is provided between the water inlet of the heat storage tank and the water outlet of the heating pipeline; a second valve is provided between the water outlet of the heating pipeline and the water inlet pipeline; and a third valve is provided between the water outlet of the heat storage tank and the water inlet pipeline.

5. The geothermal and biomass coupled heating system according to claim 3, characterized in that: A delivery pump is provided between the water inlet end of the heating pipeline and the water return pipeline.

6. The geothermal and biomass coupled heating system according to claim 3, characterized in that: The heat storage tank is also provided with an auxiliary pipeline, which is respectively connected to the heat storage tank and the return pipeline; a fourth valve is provided on the return pipeline.

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