Heat supply system for combined supply of geothermal energy and gas-fired boiler

Abstract

The utility model relates to a heat supply system for combined supply of geothermal energy and a gas-fired boiler, which comprises a geothermal well consisting of a water supply well and a water return well which are respectively used for supplying water and returning water; the heat exchange device is composed of a heat exchanger, a heat exchange pipeline, a geothermal water pump and a geothermal water tank, the heat exchanger is arranged in the water supply well, the top of the heat exchanger is communicated with the geothermal water tank through the heat exchange pipeline, and the geothermal water pump is arranged on the heat exchange pipeline. The utility model relates to the technical field of heat supply systems. According to the heat supply system for combined supply of the geothermal energy and the gas-fired boiler, through the arrangement of the geothermal well and the heat exchange device, water can be heated through the geothermal energy, so that the use of fossil energy during heat supply is greatly reduced, free switching of heat sources is achieved, and the heat supply requirements of more users can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of heating systems, in particular to a heating system jointly supplied by geothermal energy and a gas boiler. Background Art

[0002] Geothermal energy, a pollution-free, renewable, clean energy source, offers advantages over traditional fossil fuels like coal, oil, and natural gas, such as its vast availability, renewable nature, low carbon footprint, environmental friendliness, and local availability. Furthermore, the development of geothermal resources is in line with national energy conservation and emission reduction policies.

[0003] Among existing technologies, traditional energy-based centralized heating technologies include cogeneration power plants, centralized boiler rooms, and industrial and other waste heat. These technologies together constitute the heat source portion of the centralized heating system. Some specific examples and technical features are as follows:

[0004] Cogeneration: This technology produces electricity and heat energy simultaneously through power plants. It can efficiently utilize fuel and reduce energy waste. It is one of the common technologies in centralized heating.

[0005] Centralized boiler room: uses large boilers to centrally supply steam or hot water to provide heating services to surrounding areas. It is suitable for the heating needs of cities or large industrial areas.

[0006] Industrial and other waste heat: Recycling waste heat generated in industrial production processes, such as the steel and chemical industries, and converting this waste heat into thermal energy that can be used by residents and businesses through technical means.

[0007] Conventional fossil energy is a non-renewable resource and is becoming increasingly scarce. In total energy consumption, the proportion of civil heating energy consumption increases year by year, which further aggravates the increasing shortage of conventional fossil energy and is not conducive to long-term use. Utility Model Content

[0008] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a heating system that combines geothermal energy with gas boilers to solve the technical problems mentioned in the above background technology.

[0009] The above technical objectives of the present invention are achieved through the following technical solutions:

[0010] A heating system using geothermal energy and a gas boiler as a combined supply, comprising a geothermal well, which is composed of a water supply well and a return water well, for supplying water and returning water respectively;

[0011] The heat exchange device consists of a heat exchanger, a heat exchange pipeline, a geothermal water pump and a geothermal water tank. The heat exchanger is arranged in the water supply well, and the top of the heat exchanger is connected to the geothermal water tank through the heat exchange pipeline. The geothermal water pump is arranged on the heat exchange pipeline.

[0012] Heat users, including near-term users and far-term users, and the near-term users and far-term users are connected to the geothermal water tank through the near water supply pipe and the far water supply pipe respectively, and are connected to the return water well through the near water return pipe and the far water return pipe respectively;

[0013] The end of the remote water supply pipe is connected to a gas boiler, and the beginning of the remote return water pipe is connected to a water source heat pump. Heat is exchanged between the water source heat pump and the gas boiler through a circulation pipe.

[0014] Furthermore, the heat exchange pipeline is spirally arranged in the water supply well.

[0015] Furthermore, water distributors are provided on the near water supply pipe and the far water supply pipe, and water is supplied to multiple heat users through the water distributors.

[0016] Furthermore, water collectors are provided on the near return water pipe and the far return water pipe, and the return water of multiple heat users is collected together through the water collectors.

[0017] Furthermore, a water mixer is connected to the near water supply pipe and the near water return pipe through pipelines.

[0018] Furthermore, the water source heat pump is composed of a compressor, a condenser, an evaporator and a throttle valve. The input end and the output end of the compressor are respectively connected to the condenser and the evaporator. The condenser and the evaporator are connected through a pipeline, and a throttle valve is provided on the pipeline.

[0019] The remote return water pipe passes through the evaporator, and the circulation pipe passes through the condenser.

[0020] In summary, the present invention has at least one of the following beneficial technical effects:

[0021] 1. This heating system, which combines geothermal energy with gas boilers, uses geothermal wells and heat exchangers to heat water, significantly reducing the use of fossil energy for heating. It enables flexible switching of heat sources and can meet the heating needs of more users.

[0022] 2. This heating system, which is jointly supplied by geothermal energy and gas boilers, can absorb the heat of the return water in the remote return pipe when the evaporator evaporates and absorbs heat through the water source heat pump, and then heat the water in the circulation pipe when the medium releases heat in the condenser, so as to enhance the thermal energy utilization of water. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a structural schematic diagram of a heating system that combines geothermal energy and gas boilers in the present invention.

[0025] Figure 2 This is a structural schematic diagram of a water source heat pump in a heating system that is jointly supplied by geothermal energy and a gas boiler according to the present invention.

[0026] In the figure, 1. geothermal well; 101. water supply well; 102. return water well; 2. heat exchange device; 201. heat exchanger; 202. heat exchange pipeline; 203. geothermal water pump; 204. geothermal water tank; 3. heat user; 301. near-term user; 302. long-term user; 4. local water supply pipe; 5. remote water supply pipe; 6. local return water pipe; 7. remote return water pipe; 8. gas boiler; 9. water source heat pump; 901. compressor; 902. condenser; 903. evaporator; 904. throttle valve; 10. circulation pipe; 11. water distributor; 12. water collector; 13. water mixer. DETAILED DESCRIPTION

[0027] The present invention will be described in further detail below with reference to the accompanying drawings.

[0028] Example:

[0029] Reference Figure 1 - Figure 2 The utility model discloses a heating system that combines geothermal energy and gas boilers, including a geothermal well 1, which is composed of a water supply well 101 and a return water well 102, which are used for water supply and return water respectively;

[0030] Heat exchange device 2, which consists of a heat exchanger 201, a heat exchange pipeline 202, a geothermal water pump 203 and a geothermal water tank 204. The heat exchanger 201 is arranged in the water supply well 101. The top of the heat exchanger 201 is connected to the geothermal water tank 204 through the heat exchange pipeline 202. The geothermal water pump 203 is arranged on the heat exchange pipeline 202.

[0031] Heat user 3, which includes a near-term user 301 and a far-term user 302, and the near-term user 301 and the far-term user 302 are connected to the geothermal water tank 204 through the near water supply pipe 4 and the far water supply pipe 5, respectively, and are connected to the return water well 102 through the near water return pipe 6 and the far water return pipe 7, respectively;

[0032] The end of the remote water supply pipe 5 is connected to a gas boiler 8 , and the beginning of the remote return water pipe 7 is connected to a water source heat pump 9 . Heat is exchanged between the water source heat pump 9 and the gas boiler 8 via a circulation pipe 10 .

[0033] In this embodiment, geothermal energy, as a pollution-free, renewable clean energy, has the advantages of huge quantity, renewable, low carbon, environmental protection, and local use compared to traditional fossil energy such as coal, oil and natural gas.

[0034] Therefore, observe Figure 1 It can be found that by providing a geothermal well 1 and using the water supply well 101 of the geothermal well 1 as the heat source of the geothermal water tank 204, the heat exchanger 201 can use geothermal energy to heat water, and then the heated water is pumped into the geothermal water tank 204 through the heat exchange pipeline 202 and the geothermal water pump 203 for water supply, which can effectively reduce the loss of fossil energy, provide stable and environmentally friendly heating services for the surrounding areas, and achieve the effect of energy conservation and emission reduction.

[0035] However, since the distance between the heat user 3 and the water supply well 101 is uncontrollable, the heat users 3 include the relatively close recent users 301 and the relatively distant future users 302. Therefore, the heat lost by the local hot water tank 204 when supplying water to the recent user 301 through the nearby water supply pipe 4 is much less than the heat lost when supplying water to the distant user 302 through the distant water supply pipe 5. Therefore, a gas boiler 8 is connected to the end of the distant water supply pipe 5, which can be used to compensate for the heat loss in the water supply to ensure the heating of the distant user 302.

[0036] Since the heat loss of the remote water supply pipe 5 is large when supplying water, the remote user 302 needs to perform additional heating when using water. Figure 1 It can be found that a water source heat pump 9 is provided at the beginning of the remote return water pipe 7, which is used to absorb the return water heat in the remote return water pipe 7, so that the absorbed heat heats the water in the circulation pipe 10, thereby compensating for the heat lost in the remote water supply pipe 5, thereby reducing the thermal energy required by the gas boiler 8 to heat the water, which can effectively improve the utilization of the heat in the return water and greatly reduce the loss of fossil energy.

[0037] In a further preferred embodiment of the present invention, Figure 1 As shown, the heat exchange pipeline 202 is spirally arranged in the water supply well 101.

[0038] In this embodiment, by spirally arranging the heat exchange pipe 202 in the water supply well 101, the contact surface between the heat exchange pipe 202 and geothermal energy can be effectively increased, thereby improving the heat exchange efficiency of the heat exchange pipe 202 and further improving the heating efficiency.

[0039] In a further preferred embodiment of the present invention, Figure 1As shown, a water distributor 11 is provided on the near water supply pipe 4 and the far water supply pipe 5, and water is supplied to multiple heat users 3 through the water distributor 11;

[0040] The near return water pipe 6 and the far return water pipe 7 are provided with a water collector 12 , and the return water of multiple heat users 3 is collected together through the water collector 12 .

[0041] In this embodiment, since there are many recent users 301 and long-term users 302 and their distribution is not concentrated, the corresponding near water supply pipe 4 and far water supply pipe 5 need to be set with multiple branches according to demand, so Figure 1 It can be found that the water distributor 11 is provided on the near water supply pipe 4 and the far water supply pipe 5, and water is supplied to multiple heat users 3 through the water distributor 11, which can effectively improve the water supply efficiency.

[0042] As above, by providing the water collector 12 on the near return water pipe 6 and the far return water pipe 7, the efficiency of the return water can be improved.

[0043] In a further preferred embodiment of the present invention, Figure 1 As shown, the near water supply pipe 4 and the near water return pipe 6 are connected to a water mixer 13 through pipelines.

[0044] In this embodiment, since the heat loss of the near water supply pipe 4 and the near return pipe 6 is small when transporting hot water, the water in the near return pipe 6 contains more heat when returning water. Therefore, a water mixer 13 is connected between the near return pipe 6 and the near water supply pipe 4 through a pipeline. The returning hot water can be mixed with the hot water supply through the water mixer 13, which can greatly reduce energy consumption and improve the thermal efficiency of the system.

[0045] In a further preferred embodiment of the present invention, Figure 1 and Figure 2 As shown, the water source heat pump 9 is composed of a compressor 901, a condenser 902, an evaporator 903 and a throttle valve 904. The input end and the output end of the compressor 901 are connected to the condenser 902 and the evaporator 903 respectively. The condenser 902 and the evaporator 903 are connected through a pipeline, and a throttle valve 904 is provided on the pipeline.

[0046] The remote return water pipe 7 passes through the evaporator 903 , and the circulation pipe 10 passes through the condenser 902 .

[0047] In this embodiment, the compressor 901 is provided so that the medium flowing in the pipes of the water source heat pump 9 can be vaporized in the evaporator 903 to absorb heat and liquefied in the condenser 902 to release heat, so that heat is continuously exchanged and transferred.

[0048] Therefore, by passing the remote return water pipe 7 through the evaporator 903, the evaporator 903 can absorb the heat of the return water in the remote return water pipe 7 when evaporating and absorbing heat, and then heat the water in the circulation pipe 10 when the medium releases heat in the condenser 902, so as to enhance the thermal energy utilization of the water.

[0049] The embodiments of this specific implementation method are all preferred embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the scope of protection of the present utility model.

Claims

1. A heating system using geothermal energy and gas boilers, characterized in that: It includes a geothermal well (1), which is composed of a water supply well (101) and a return water well (102), which are used for water supply and return water respectively; A heat exchange device (2) is composed of a heat exchanger (201), a heat exchange pipeline (202), a geothermal water pump (203) and a geothermal water tank (204); the heat exchanger (201) is arranged in a water supply well (101); the top of the heat exchanger (201) is connected to the geothermal water tank (204) through the heat exchange pipeline (202); and the geothermal water pump (203) is arranged on the heat exchange pipeline (202); Heat users (3), including near-term users (301) and far-term users (302), wherein the near-term users (301) and far-term users (302) are respectively connected to the geothermal water tank (204) via a near water supply pipe (4) and a far water supply pipe (5), and are respectively connected to the return water well (102) via a near return water pipe (6) and a far return water pipe (7); The end of the remote water supply pipe (5) is connected to a gas boiler (8), and the beginning of the remote water return pipe (7) is connected to a water source heat pump (9). Heat is exchanged between the water source heat pump (9) and the gas boiler (8) via a circulation pipe (10).

2. A heating system using geothermal energy and a gas boiler as combined supply according to claim 1, characterized in that: The heat exchange pipeline (202) is spirally arranged in the water supply well (101).

3. A heating system using geothermal energy and a gas boiler as combined supply according to claim 2, characterized in that: The near water supply pipe (4) and the far water supply pipe (5) are provided with a water distributor (11), and water is supplied to a plurality of heat users (3) through the water distributor (11).

4. A heating system using geothermal energy and a gas boiler as combined supply according to claim 3, characterized in that: The near return water pipe (6) and the far return water pipe (7) are provided with a water collector (12), and the return water of multiple heat users (3) is collected together through the water collector (12).

5. A heating system using geothermal energy and gas boilers as claimed in claim 4, characterized in that: The near water supply pipe (4) and the near water return pipe (6) are connected to a water mixer (13) via pipelines.

6. A heating system using geothermal energy and gas boilers as claimed in claim 5, characterized in that: The water source heat pump (9) is composed of a compressor (901), a condenser (902), an evaporator (903) and a throttle valve (904); the input end and the output end of the compressor (901) are respectively connected to the condenser (902) and the evaporator (903); the condenser (902) and the evaporator (903) are connected through a pipeline, and the throttle valve (904) is provided on the pipeline; The remote return water pipe (7) passes through the evaporator (903), and the circulation pipe (10) passes through the condenser (902).

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