Non-interference geothermal heat supply system

Abstract

The present application belongs to the technical field of geothermal heat supply, and provides a non-interference geothermal heat supply system, which comprises a buffer tank, the outer surface of the buffer tank is fixedly provided with a water inlet pump, the input end of the water inlet pump is fixedly communicated with the lower part of the side surface of the buffer tank, the output end of the water inlet pump is fixedly communicated with a water injection joint, the water outlet end of the water injection joint is fixedly communicated with a water injection main pipe, and the water injection main pipe is provided with a plurality of geothermal heat exchange elements. Through the arrangement of the water inlet filter, the quartz sand, the ceramic granule and the activated carbon can be used to filter the external water body, so that the silt, the suspended impurities and the particulate matter in the water can be completely intercepted, the impurities can be prevented from entering the subsequent pipeline and the heat exchange equipment, the pipeline blockage, the heat exchange pipe wear and the heat pump unit fouling problem can be avoided, the water flow pulse fluctuation can be eliminated by the buffer tank, the water supply water pressure can be stabilized, the water flow interference can be avoided, the water circulation and delivery can be stabilized, and the heat exchange efficiency of the system can be improved.

Description

Technical Field

[0001] This invention belongs to the field of geothermal heating technology, and specifically relates to a non-interference geothermal heating system. Background Technology

[0002] Geothermal heating is a clean energy heating technology that utilizes the stable thermal energy of deep underground rock masses for heat exchange and heating. It boasts advantages such as stable thermal energy, low energy consumption, environmental friendliness, and long service life, and is widely used in building heating, factory heating, and constant-temperature energy supply. Geothermal heating systems primarily exchange heat with underground rock masses through buried heat exchange structures, extracting constant low-temperature underground thermal energy. This heat energy is then upgraded using heat pump units to achieve continuous and stable heating.

[0003] Currently, geothermal heating systems suffer from poor heat exchange efficiency during operation. This is due to several factors, including the lack of filtration and purification structures before the incoming water enters the pipes and heat exchange equipment. This allows sediment, impurities, and particulate matter in the groundwater and circulating water to easily enter the pipes and heat exchange equipment, leading to pipe blockage, heat exchange tube wear, and scale buildup in the heat pump unit over time. This reduces system heat exchange efficiency and equipment lifespan. Furthermore, traditional geothermal heat exchange structures are simple, with limited heat exchange area, uneven internal water flow distribution, insufficient heat exchange, and low thermal energy utilization, failing to fully utilize the underground rock's thermal energy resources. Therefore, to address these issues, we offer a non-intrusive geothermal heating system. Summary of the Invention

[0004] To solve the above technical problems, this invention proposes a non-interference geothermal heating system.

[0005] The technical solution of this invention is:

[0006] This invention proposes a non-intrusive geothermal heating system, comprising a buffer tank, an inlet pump fixedly installed on the outer surface of the buffer tank, the input end of the inlet pump being fixedly connected to the lower part of the side of the buffer tank, the output end of the inlet pump being fixedly connected to a water injection connector, the outlet end of the water injection connector being fixedly connected to a water injection main pipe, the water injection main pipe being provided with multiple geothermal heat exchange elements, an inlet connecting pipe being fixedly connected to the other side of the buffer tank, an inlet filter being provided at one end of the inlet connecting pipe, an outlet bend being provided on one side of each geothermal heat exchange element, a group of outlet bends being fixedly connected to an outlet main pipe, the outer surface of the outlet main pipe being fixedly connected to an outlet connecting pipe, and a heat pump unit being fixedly connected to one end of the outlet connecting pipe.

[0007] Preferably, the output end of the heat pump unit is fixedly connected to a main branch pipe, and the outer surface of the main branch pipe is fixedly connected to a set of branch outlet pipes, and the outer surface of each branch outlet pipe is fixedly connected to a regulating valve.

[0008] Preferably, the water inlet filter includes a filter outer cylinder fixedly connected to one end of a water inlet connecting pipe and a filter cover threadedly connected to the inner ring of the filter outer cylinder. A water inlet connector is fixedly connected to one side of the outer surface of the filter outer cylinder, and the water inlet connector is located above the filter cover.

[0009] Preferably, a sealing cap is threaded onto the outer surface of the top of the filter outer cylinder, and a quartz sand filter layer, a ceramic granule filter layer, and an activated carbon filter layer are fixedly connected from top to bottom to the inner ring of the filter cover.

[0010] Preferably, the geothermal heat exchanger includes a buried heat exchange tube shell and a sealing cover fixedly installed at the top of the buried heat exchange tube shell. The water inlet end of the water outlet bend is fixedly connected to the outer surface of the buried heat exchange tube shell. A water injection head is fixedly connected to the inner top wall of the sealing cover. A water injection inner pipe is provided inside the buried heat exchange tube shell. Multiple heat exchange baffles are fixedly connected to the outer surface of the water injection inner pipe. The other side of each heat exchange baffle is fixedly connected to the inner ring of the buried heat exchange tube shell. The area between the buried heat exchange tube shell and the water injection inner pipe is a heat exchange zone. The bottom end of the water injection head extends into the interior of the water injection inner pipe. A sealing gasket is provided between the water injection head and the water injection inner pipe. The top end of each water injection head is fixedly connected to the outer surface of the water injection main pipe.

[0011] Preferably, a mounting base plate is fixedly installed on the bottom surface of the heat pump unit, and the upper surface of the mounting base plate is fixedly connected to the bottom surface of the main distribution pipe.

[0012] The present invention has the following advantages and effects compared with the prior art:

[0013] (1) The non-interference geothermal heating system can filter external water bodies using three layers of quartz sand, ceramsite and activated carbon through the setting of inlet water filter. It can completely intercept mud, suspended impurities and particulate matter in the water, prevent impurities from entering the subsequent pipeline and heat exchange equipment, avoid pipeline blockage, heat exchange tube wear and heat pump unit scale problems. At the same time, the buffer tank can eliminate water flow pulse fluctuations, stabilize water supply pressure, avoid water flow interference, ensure smooth water circulation and transportation, and improve the system heat exchange efficiency.

[0014] (2) This non-interference geothermal heating system, by setting up multiple geothermal heat exchange components and by setting up multiple heat exchange baffles between the water injection inner pipe and the buried heat exchange pipe shell, enables water to circulate in the heat exchange area between adjacent heat exchange baffles, thereby enabling multi-directional diversion and flow restriction heat exchange, increasing and extending the water flow heat exchange path, and enabling the water flow to fully exchange heat with the underground rock mass. Combined with the heat pump unit, it can pressurize and raise the temperature of low-grade heat energy, thereby improving the heat energy utilization efficiency. Attached Figure Description

[0015] Figure 1 This is a front view of the non-interference geothermal heating system of the present invention.

[0016] Figure 2 This is a side view of the non-interference geothermal heating system of the present invention.

[0017] Figure 3 This is a frontal cross-sectional view of the buffer tank in the non-interference geothermal heating system of the present invention.

[0018] Figure 4 This is a side cross-sectional view of the geothermal heat exchanger in the non-interference geothermal heating system of the present invention.

[0019] Figure 5 This is a frontal cross-sectional view of the water inlet filter element in the non-interference geothermal heating system of the present invention.

[0020] Figure 6 This is a top sectional view of the buried heat exchanger shell in the non-intrusive geothermal heating system of the present invention.

[0021] Reference numerals: 1. Buffer tank; 2. Inlet pump; 3. Inlet connector; 4. Inlet connecting pipe; 5. Inlet filter element; 6. Geothermal heat exchanger element; 7. Outlet elbow; 8. Outlet main pipe; 9. Outlet connecting pipe; 10. Mounting base plate; 11. Heat pump unit; 12. Diversion main pipe; 13. Diversion outlet pipe; 14. Regulating valve; 16. Inlet main pipe; 51. Filter outer cylinder; 52. Inlet connector; 53. Sealing cover; 54. Filter cover; 55. Activated carbon filter layer; 56. Ceramsite filter media layer; 57. Quartz sand filter layer; 61. Buried heat exchanger shell; 62. Inlet water pipe; 63. Heat exchange diaphragm; 64. Inlet water head; 65. Sealing cover. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present invention, specific embodiments will now be described in further detail. It should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of the invention.

[0023] Example 1:

[0024] like Figures 1-6As shown, this invention provides a non-intrusive geothermal heating system, including a buffer tank 1. An exhaust valve is fixedly connected to the outer surface of the buffer tank 1. The buffer tank 1 is made of corrosion-resistant carbon steel, possessing pressure resistance, rust resistance, and water storage and pressure stabilization properties. An inlet pump 2 is fixedly installed on the outer surface of the buffer tank 1. The inlet pump 2 is a variable frequency circulating water pump, which can automatically adjust its speed and water output according to the system load to adapt to different heating conditions. The input end of the inlet pump 2 is fixedly connected to the lower part of the side of the buffer tank 1, and the output end of the inlet pump 2 is fixedly connected to a water injection connector 3. The water injection connector 3 is made of non-corrosion-resistant carbon steel. The stainless steel quick-connect coupling offers strong sealing and adaptability. The outlet of the water inlet connector 3 is fixedly connected to the main water inlet pipe 16, which houses multiple geothermal heat exchange components 6. The other side of the buffer tank 1 is fixedly connected to the inlet water inlet pipe 4, with an inlet filter 5 at one end. Each geothermal heat exchange component 6 has an outlet bend 7 on one side, and a group of outlet bends 7 are fixedly connected to the main outlet pipe 8. The outer surface of the main outlet pipe 8 is fixedly connected to an outlet water inlet pipe 9, with one end of the outlet water inlet pipe 9 fixedly connected to a heat pump unit 11. Specifically, the buffer tank 1 stores circulating water, stabilizes pipeline water pressure, eliminates water flow pulse fluctuations, avoids airflow and water pressure interference, and ensures continuous and stable water circulation in the system. The inlet water pump 2 provides power for the system's water circulation, continuously delivering the stabilized purified water to the heat exchange structure to ensure stable operation of the heating cycle. The inlet water filter 5 pre-purifies the water, intercepting impurities to protect downstream pipelines and equipment, reducing equipment wear and the probability of blockage.

[0025] Furthermore, the heat pump unit 11 is a water-source ground-source heat pump unit equipped with an intelligent temperature control electrical module, which can automatically collect the return water temperature signal and adjust the operating power of the compressor unit to achieve efficient heat energy conversion. The output end of the heat pump unit 11 is fixedly connected to a branch main pipe 12, and the outer surface of the branch main pipe 12 is fixedly connected to a branch outlet pipe 13. The entire pipeline adopts heat-insulated composite pipe material to reduce heat energy loss along the way. The outer surface of each branch outlet pipe 13 is fixedly connected to a regulating valve 14. The regulating valve 14 is an electric flow regulating valve, which can receive electrical control signals to accurately adjust the pipeline diameter and water flow. The bottom surface of the heat pump unit 11 is fixedly installed with a mounting base plate 10. The mounting base plate 10 adopts a thickened steel plate shock-absorbing structure to reduce the vibration and noise of the unit operation. The upper surface of the mounting base plate 10 is fixedly connected to the bottom surface of the branch main pipe 12. Specifically, the heat pump unit 11 can pressurize and raise the temperature of low-grade heat energy collected underground, converting low-temperature water energy into high-temperature hot water energy, thereby improving the quality of heat energy utilization. The main branch pipe 12 and the branch outlet pipe 13 can realize multi-path water supply, adapting to the synchronous heating needs of multiple areas. The flow rate of a single pipeline can be independently controlled through the regulating valve 14, realizing zoned on-demand temperature control, which greatly improves the flexibility and energy saving of heating.

[0026] Furthermore, the inlet filter element 5 includes an outer filter cylinder 51 fixedly connected to one end of the inlet connecting pipe 4, and a filter cover 54 with a threaded connection to the inner ring of the outer filter cylinder 51. The outer filter cylinder 51 is made of pressure-resistant transparent PC material, which facilitates direct observation of the internal impurity accumulation. An inlet connector 52 is fixedly connected to one side of the outer surface of the outer filter cylinder 51, and the inlet connector 52 is located above the filter cover 54. A sealing cap 53 is threadedly connected to the outer surface of the top of the outer filter cylinder 51. The threaded connection structure facilitates disassembly, maintenance, and cleaning of filter media impurities. The inner ring of the filter cover 54... The filter consists of a quartz sand filter layer 57, a ceramic granule filter layer 56, and an activated carbon filter layer 55, which are fixedly connected from top to bottom. All three filter layers are detachable and replaceable. The three filter layers enable gradient filtration. The quartz sand filter layer 57 intercepts large particles of silt, the ceramic granule filter layer 56 adsorbs suspended impurities, and the activated carbon filter layer 55 purifies fine impurities in the water. The threaded sealing structure ensures that there is no leakage or bypass of impurities during the filtration process. Therefore, the pre-filter structure can protect the downstream heat exchange pipeline and heat pump equipment from the source and effectively avoid scale buildup, wear, and blockage.

[0027] Furthermore, the geothermal heat exchanger 6 includes a buried heat exchange tube shell 61 and a sealing cover 65 fixedly installed at the top of the buried heat exchange tube shell 61. The buried heat exchange tube shell 61 is made of a high thermal conductivity alloy material, which has a high thermal conductivity, is corrosion resistant, and is suitable for humid underground deep-buried environments. The water inlet end of the outlet bend 7 is fixedly connected to the outer surface of the buried heat exchange tube shell 61. A water injection head 64 is fixedly connected to the inner top wall of the sealing cover 65. A water injection inner pipe 62 is provided inside the buried heat exchange tube shell 61, and multiple heat exchange baffles are fixedly connected to the outer surface of the water injection inner pipe 62. 63. The heat exchange baffle 63 is a flow-guiding and heat-conducting plate that can simultaneously assist in heat conduction. The other side of each heat exchange baffle 63 is fixedly connected to the inner ring of the buried heat exchange pipe shell 61. The area between the buried heat exchange pipe shell 61 and the water injection inner pipe 62 is the heat exchange zone. The bottom end of the water injection head 64 extends into the interior of the water injection inner pipe 62, and a sealing gasket is provided between the water injection head 64 and the water injection inner pipe 62. The sealing gasket is made of high-temperature resistant and aging-resistant rubber material, which has excellent sealing and anti-seepage effect. The top end of each water injection head 64 is fixedly connected to the outer surface of the water injection main pipe 16. The heat exchange baffle 63 can divide the heat exchange area and extend the water flow path, solving the problems of uneven water flow distribution and insufficient heat exchange in traditional heat exchange. The heat exchange structure of the double-layer pipe increases the effective heat exchange area, which can enhance the absorption efficiency of geothermal energy.

[0028] Working principle: First, the external circulating water source enters the filter outer cylinder 51 through the water inlet connector 52, and passes through the quartz sand filter layer 57, the ceramic granule filter layer 56, and the activated carbon filter layer 55 in a multi-stage layered filtration process to completely intercept the mud, suspended impurities, and particulate matter in the water. The purified clean water flows into the buffer tank 1 through the water inlet connecting pipe 4. The buffer tank 1 is used to stabilize the water pressure, eliminate water flow pulse fluctuations, avoid water flow interference, and ensure that the subsequent water circulation and transportation are stable.

[0029] Next, the water inlet pump 2 is started to draw clean water that has been stabilized inside the buffer tank 1 and deliver it to the water injection main pipe 16 through the water injection connector 3. The water is then distributed to each group of water injection heads 64. The water is introduced into the water injection inner pipe 62 through the water injection head 64 and flows evenly into the heat exchange area inside the buried heat exchange tube shell 61. Under the blocking and guiding effect of the heat exchange partition 63, the water flows slowly along the heat exchange path, fully exchanging heat with the underground rock mass, maximizing the absorption of constant underground rock heat energy, and completing the low-temperature heat energy collection.

[0030] After heat exchange by each group of geothermal heat exchangers 6, the water is collected through the corresponding outlet bend 7 and then uniformly sent to the outlet main pipe 8. It is then smoothly transported to the heat pump unit 11 via the outlet connecting pipe 9. The heat pump unit 11 pressurizes and heats the collected low-grade geothermal energy to improve the quality of heat energy utilization and outputs high-temperature hot water that meets the heating standards to meet the building's heating needs. The high-temperature water, after being heated by the heat pump unit 11, enters the distribution main pipe 12 and is distributed to various heating areas through multiple distribution outlet pipes 13. Staff can independently adjust the water flow of the corresponding pipelines according to the actual heating needs on site through the regulating valves 14 of each group to achieve zoned temperature control and on-demand heating.

[0031] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. All equivalent changes and modifications made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. A non-intrusive geothermal heating system, comprising a buffer tank (1), wherein an inlet pump (2) is fixedly installed on the outer surface of the buffer tank (1), and the input end of the inlet pump (2) is fixedly connected to the lower part of the side of the buffer tank (1), characterized in that: The output end of the water inlet pump (2) is fixedly connected to the water inlet connector (3), the outlet end of the water inlet connector (3) is fixedly connected to the water inlet main pipe (16), the water inlet main pipe (16) is provided with multiple rock heat exchange components (6), the other side of the buffer tank (1) is fixedly connected to the water inlet connecting pipe (4), one end of the water inlet connecting pipe (4) is provided with the water inlet filter (5), one side of each rock heat exchange component (6) is provided with the water outlet bend (7), one end of a group of water outlet bends (7) is fixedly connected to the water outlet main pipe (8), the outer surface of the water outlet main pipe (8) is fixedly connected to the water outlet connecting pipe (9), one end of the water outlet connecting pipe (9) is fixedly connected to the heat pump unit (11).

2. The non-intrusive geothermal heating system according to claim 1, characterized in that: The output end of the heat pump unit (11) is fixedly connected to a main branch pipe (12), and the outer surface of the main branch pipe (12) is fixedly connected to a branch outlet pipe (13). The outer surface of each branch outlet pipe (13) is fixedly connected to a regulating valve (14).

3. The non-intrusive geothermal heating system according to claim 1, characterized in that: The water inlet filter element (5) includes a filter outer cylinder (51) fixedly connected to one end of a water inlet connecting pipe (4) and a filter cover (54) threadedly connected to the inner ring of the filter outer cylinder (51). A water inlet connector (52) is fixedly connected to one side of the outer surface of the filter outer cylinder (51), and the water inlet connector (52) is located above the filter cover (54).

4. The non-intrusive geothermal heating system according to claim 3, characterized in that: The outer surface of the top of the filter outer cylinder (51) is threaded with a sealing cap (53), and the inner ring of the filter cover (54) is fixedly connected from top to bottom with a quartz sand filter layer (57), a ceramic granule filter layer (56) and an activated carbon filter layer (55).

5. The non-intrusive geothermal heating system according to claim 1, characterized in that: The geothermal heat exchanger (6) includes a buried heat exchange tube shell (61) and a sealing cover (65) fixedly installed on the top of the buried heat exchange tube shell (61). The water inlet end of the water outlet bend (7) is fixedly connected to the outer surface of the buried heat exchange tube shell (61), and a water injection head (64) is fixedly connected to the inner top wall of the sealing cover (65).

6. The non-intrusive geothermal heating system according to claim 5, characterized in that: The buried heat exchange tube shell (61) is provided with a water injection inner tube (62) inside. Multiple heat exchange baffles (63) are fixedly connected to the outer surface of the water injection inner tube (62). The other side of each heat exchange baffle (63) is fixedly connected to the inner ring of the buried heat exchange tube shell (61). The buried heat exchange tube shell (61) and the water injection inner tube (62) are in a heat exchange zone. The bottom end of the water injection head (64) extends into the interior of the water injection inner tube (62). A sealing gasket is provided between the water injection head (64) and the water injection inner tube (62). The top end of each water injection head (64) is fixedly connected to the outer surface of the water injection main tube (16).

7. The non-intrusive geothermal heating system according to claim 2, characterized in that: The bottom surface of the heat pump unit (11) is fixedly mounted with a mounting base plate (10), and the upper surface of the mounting base plate (10) is fixedly connected to the bottom surface of the main distribution pipe (12).

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