CN211177038U

CN211177038U - Heating system adopting terrestrial heat as heating source

Info

Publication number: CN211177038U
Application number: CN201922258229.6U
Authority: CN
Inventors: 王峦; 葛强; 江义; 邓迎强; 刘玉恒
Original assignee: Tianjin Century Tianyuan Group Co ltd
Current assignee: Tianjin Century Tianyuan Group Co ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-08-04
Anticipated expiration: 2029-12-16

Abstract

The utility model relates to an adopt geothermol power as heating system of heating heat source. Comprising a geothermal exploitation well and a geothermal recharge well; the geothermal energy recovery system also comprises a recharge pressure pump, a floor heating heat exchanger and an intermediate heat exchanger, wherein an output pipeline extending from the geothermal exploitation well is connected to the recharge pressure pump, the outlet of the recharge pressure pump is connected to the primary side inlet of the floor heating heat exchanger, the primary side outlet of the floor heating heat exchanger is connected to the primary side inlet of the intermediate heat exchanger, and the primary side outlet of the intermediate heat exchanger is connected to the geothermal recharge well; the floor heating system is characterized by further comprising a water source heat pump, a secondary side outlet of the intermediate heat exchanger is connected to an evaporator inlet of the water source heat pump through an intermediate circulating pump, an evaporator outlet of the water source heat pump is connected to a secondary side inlet of the intermediate heat exchanger, a condenser outlet of the water source heat pump is connected to a secondary side outlet of the floor heating heat exchanger, and a condenser inlet of the water source heat pump is connected to a secondary side inlet of the floor heating heat exchanger. The utility model has the advantages of reasonable design, make full use of heat energy.

Description

Heating system adopting terrestrial heat as heating source

Technical Field

The utility model belongs to the technical field of heating equipment, especially, relate to an adopt heating system of geothermol power as heating heat source.

Background

In a heating system using geothermal water as a heat source, the heat extraction of the heat in a water source is a more critical technical link. Usually, heat is extracted from geothermal water by using heat exchanger facilities, a water source pipeline carrying heat exchanges heat with a heating pipeline in the heat exchanger, and a water medium in the heating pipeline exchanges heat and is heated up and then is supplied to a subsequent system link.

In the construction of a heating and heat supplying system, the design of the geothermal heating system is to utilize the heat energy in the geothermal well water as much as possible, namely, the heat energy in the geothermal well water is fully utilized, so that the operation efficiency of the heating heat exchange station is improved, and the operation cost is reduced to improve the operation income. The existing heating and heat supply station system can only utilize a part of heat energy in geothermal well water generally, geothermal well water after finishing heat energy extraction directly recharges to a recharging well, and does not fully utilize geothermal well water, so that the heat energy utilization rate of the whole system is reduced, the system needs to acquire more heat energy from geothermal well water with larger flow, the load of the system is increased undoubtedly, and the operation cost of the heating system is increased.

The realization is to the maximize heat utilization of geothermol power well water will help reducing the operation cost of whole heating system, is favorable to optimizing the component structure of whole heating heat supply station simultaneously. Therefore, developing and designing a more reasonable heating system using geothermal heat as a heating heat source has very important significance for improving the operating efficiency of the heating heat exchange station, reducing the operating cost and improving the operating income.

SUMMERY OF THE UTILITY MODEL

The utility model provides a heating system which adopts geothermy as a heating heat source and has reasonable structural design and makes full use of the heat energy in the geothermy well water for solving the technical problems in the prior art.

The utility model discloses a solve the technical scheme that technical problem that exists among the well-known technique took and be: a heating system using geothermy as heating source comprises a geothermy exploitation well and a geothermy recharge well; the geothermal energy recovery system also comprises a recharge pressure pump, a floor heating heat exchanger and an intermediate heat exchanger, wherein an output pipeline extending from the geothermal exploitation well is connected to the recharge pressure pump, the outlet of the recharge pressure pump is connected to the primary side inlet of the floor heating heat exchanger, the primary side outlet of the floor heating heat exchanger is connected to the primary side inlet of the intermediate heat exchanger, and the primary side outlet of the intermediate heat exchanger is connected to the recharge pipeline of the geothermal recharge well; a water return port of the floor heating pipe network is connected to a secondary side inlet of the floor heating heat exchanger, a heat supply circulating pump is arranged on a connecting pipeline, and a water inlet of the floor heating pipe network is connected to a secondary side outlet of the floor heating heat exchanger; the floor heating system further comprises a water source heat pump, wherein a secondary side outlet of the intermediate heat exchanger is connected to an evaporator inlet of the water source heat pump through an intermediate circulating pump, an evaporator outlet of the water source heat pump is connected to a secondary side inlet of the intermediate heat exchanger, a condenser outlet of the water source heat pump is connected to a secondary side outlet of the floor heating heat exchanger, and a condenser inlet of the water source heat pump is connected to a secondary side inlet of the floor heating heat exchanger; still include water charging system, water charging system includes moisturizing case and softened water installation, and the entry of softened water installation passes through the water source entry of tube coupling to water source, exit linkage to moisturizing case, and the inlet that the water supply mouth of moisturizing case is connected to the entry of middle circulating pump and the entry of heat supply circulating pump through the constant pressure moisturizing pump.

The utility model has the advantages that: the utility model provides a heating system of adoption geothermol power as heating heat source that structural design is reasonable compares with current heating system, the utility model discloses in through setting up middle heat exchanger and water source heat pump, realized having once side the recovery of heat energy in the export tail water and drawing floor heating heat exchanger, through the leading-in floor heating pipe network of heat energy with above-mentioned recovery, promoted heating system to the utilization ratio of heat energy in the geothermol power well water, help promoting heating system's operating efficiency, reduced the operation cost and promoted the operation income. The water replenishing system consisting of the water softening device, the water replenishing tank and the constant-pressure water replenishing pump is arranged, so that automatic water replenishing to the heating pipe network is realized when the heating pipe network is lack of water. The water softening device is used for pre-treating the tap water source, so that the tap water source is softened and stored after treatment, and the water quality of water supplement is ensured.

Preferably: the water source heat pump comprises a first water source heat pump and a second water source heat pump which are arranged in parallel, an outlet of the intermediate circulating pump is simultaneously connected to inlets of evaporators of the first water source heat pump and the second water source heat pump, and outlets of the evaporators of the first water source heat pump and the second water source heat pump are converged and then connected to a secondary side inlet of the intermediate heat exchanger; outlets of the first water source heat pump and the second water source heat pump are connected to a secondary side outlet of the floor heating heat exchanger, and inlets of the first water source heat pump and the second water source heat pump are connected to secondary side inlets of the floor heating heat exchanger.

Preferably: a dirt remover is arranged on a pipeline between a water return port of the floor heating pipe network and an inlet of the heat supply circulating pump.

Preferably: the geothermal exploitation well comprises a geothermal exploitation well, and is characterized by further comprising a rotational flow desander, wherein an output pipeline extending out of the geothermal exploitation well is connected with an inlet of the rotational flow desander, and an outlet of the rotational flow desander is connected with an inlet of the recharging pressure pump.

Preferably: the constant pressure water replenishing pump is characterized by further comprising a return pipeline, wherein one end of the return pipeline is connected to a pipeline between an outlet of the constant pressure water replenishing pump and an inlet of the heat supply circulating pump, and the other end of the return pipeline is connected to the water replenishing tank.

Preferably: and a filtering device and an exhaust device are also arranged on the recharge pipeline between the intermediate heat exchanger and the geothermal recharge well.

Preferably: the exhaust device comprises an exhaust tank, a water inlet is arranged in the middle of the top wall of the exhaust tank, a water outlet is arranged at the bottom of the side wall, a fan hole is also arranged at the middle upper part of the side wall of the exhaust tank, and a fan is arranged on the fan hole; the top of the inner cavity of the exhaust tank and the upper part of the fan hole are provided with supporting plates, and a first filter material layer, a second filter material layer and a third filter material layer are sequentially arranged on the supporting plates from top to bottom.

Preferably: the filtering device comprises a filtering tank, a water inlet is formed in the top of the side wall of the filtering tank, a water outlet is formed in the bottom of the side wall of the filtering tank, a supporting plate is arranged on the middle lower portion of the inner cavity of the filtering tank and above the water outlet, and a fine manganese sand layer, a medium manganese sand layer, a coarse manganese sand layer, a fine cobble layer, a medium cobble layer and a coarse cobble layer are sequentially arranged on the supporting plate from top to bottom.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic cross-sectional view of the exhaust apparatus of FIG. 1;

fig. 3 is a schematic sectional view of the filter device of fig. 1.

In the figure: 1. a geothermal production well; 2. a cyclone desander; 3. recharging the pressure pump; 4. a floor heating heat exchanger; 5. an intermediate circulation pump; 6. a heat supply circulating pump; 7. a dirt separator; 8. an intermediate heat exchanger; 9. a geothermal recharge well; 10. an exhaust device; 10-1, a water inlet; 10-2, a first filter material layer; 10-3, a second filter material layer; 10-4, a third filter material layer; 10-5, a support plate; 10-6, a fan port; 10-7, an exhaust tank; 10-8, a water outlet; 11. a filtration device; 11-1, a filtering tank; 11-2, a water inlet; 11-3, a supporting plate; 11-4, a fine manganese sand layer; 11-5, a medium manganese sand layer; 11-6, coarse manganese sand layer; 11-7 parts of fine cobble layer; 11-8, middle cobble layer; 11-9 parts of a thick cobble layer; 11-10 parts of a water outlet; 12. a first water source heat pump; 13. a second water source heat pump; 14. a constant pressure water replenishing pump; 15. a water replenishing tank; 16. a water softening device.

Detailed Description

In order to further understand the contents, features and effects of the present invention, the following embodiments are described in detail:

referring to fig. 1, the heating system using geothermal heat as a heating source of the present invention includes a geothermal exploitation well 1 and a geothermal recharging well 9, wherein the geothermal exploitation well 1 is used for exploiting geothermal well water, and the geothermal recharging well 9 is used for recharging geothermal well water.

Still include recharge force (forcing) pump 3, floor heating heat exchanger 4 and intermediate heat exchanger 8, the output pipeline that extends by the geothermal exploitation 1 well is connected to recharge force (forcing) pump 3, and the export of recharge force (forcing) pump 3 is connected to the primary side entry of floor heating heat exchanger 4, and the primary side export of floor heating heat exchanger 4 is connected to the primary side entry of intermediate heat exchanger 8, and the primary side export of intermediate heat exchanger 8 is connected to the recharge pipeline of geothermal recharge well 9.

The recharging pressure pumps 3 are used for increasing geothermal well water in the pipeline to improve flowing power, and as shown in the figure, two groups of recharging pressure pumps 3 are arranged in parallel to realize one use and one standby so as to improve the operation reliability. The floor heating heat exchanger 4 is used for heat exchange between heating hot water in a floor heating pipe network and geothermal well water, and the intermediate heat exchanger 8 is used for obtaining heat energy in tail water discharged from a primary side outlet of the floor heating heat exchanger 4, namely, the heat energy in the tail water is firstly recovered and extracted before geothermal well water is injected into the geothermal recharge well 9, so that the purpose of fully utilizing the heat energy is achieved.

In the embodiment, the geothermal exploitation well further comprises a cyclone desander 2, an output pipeline extending out of the geothermal exploitation well 1 is connected with an inlet of the cyclone desander 2, and an outlet of the cyclone desander 2 is connected with an inlet of the recharge booster pump 3. The working principle of the cyclone desander 2 is as follows: geothermal well water flows along the inner wall after entering the interior, and solid particle impurities in the geothermal well water settle to the bottom and are discharged, so that the aim of removing particle impurities in the geothermal well water is achieved.

In this embodiment, a filtering device 11 and an exhaust device 10 are further installed on the recharge pipeline between the intermediate heat exchanger 8 and the geothermal recharge well 9, wherein the filtering device 11 is used for filtering the tail water before recharging, and the exhaust device 10 is used for exhausting the tail water before recharging.

The exhaust device 10 comprises an exhaust tank 10-7, a water inlet 10-1 is arranged in the middle of the top wall of the exhaust tank 10-7, a water outlet 10-8 is arranged at the bottom of the side wall, a fan hole 10-6 is further arranged at the middle upper part of the side wall of the exhaust tank 10-7, and a fan is mounted on the fan hole 10-6. A supporting plate 10-5 is arranged on the top of an inner cavity of the exhaust tank 10-7 and above the fan hole 10-6, the supporting plate 10-5 is a metal hole plate, and a first filter material layer 10-2, a second filter material layer 10-3 and a third filter material layer 10-4 are sequentially arranged on the supporting plate 10-5 from top to bottom.

Tail water of geothermal well water enters through the water inlet 10-1 and enters into an inner cavity of the exhaust tank 10-7 after sequentially passing through the first filter material layer 10-2, the second filter material layer 10-3 and the third filter material layer 10-4, and the fan is used for exhausting gas from the exhaust tank 10-7, so that the inside of the exhaust tank is kept in a relatively low-pressure environment, dissolved gas components in the tail water of geothermal well water can escape conveniently, and the aim of exhausting is fulfilled.

A third filter material layer 10-4 is laid on the support plate 10-5, a second filter material layer 10-3 is laid on the third filter material layer 10-4, and a first filter material layer 10-2 is laid on the second filter material layer 10-3.

In this embodiment, the first filter material layer 10-2 is composed of volcanic granular filter materials, the second filter material layer 10-3 is composed of ceramsite filter materials, and the third filter material layer 10-4 is composed of activated carbon granular filter materials. Specifically, the volcanic granular filter material is prepared by cutting and grinding volcanic, the particle size is larger and can be 3-6cm generally, the ceramsite filter material is prepared by firing pottery clay, the particle size is medium and can be 1-3cm generally, the activated carbon granular filter material is prepared by pressing activated carbon material, and the particle size is smaller and can be 0.5-1cm generally. The three filter material layers are used for carrying out multi-stage filtration on the geothermal well water tail water, and in the filtration process, particulate matter impurities in the geothermal well water tail water are intercepted and filtered.

The filtering device 11 comprises a filtering tank 11-1, a water inlet 11-2 is arranged at the top of the side wall of the filtering tank 11-1, a water outlet 11-10 is arranged at the bottom of the side wall, a supporting plate 11-3 is arranged at the middle lower part of the inner cavity of the filtering tank 11-1 and above the water outlet 11-10, the supporting plate 11-3 is a metal pore plate, and a fine manganese sand layer 11-4, a medium manganese sand layer 11-5, a coarse manganese sand layer 11-6, a fine cobble layer 11-7, a medium cobble layer 11-8 and a coarse cobble layer 11-9 are sequentially arranged on the supporting plate 11-3 from top to bottom.

A coarse cobble layer 11-9, a middle cobble layer 11-8, a fine cobble layer 11-7, a coarse manganese sand layer 11-6, a middle manganese sand layer 11-5 and a fine manganese sand layer 11-4 are sequentially laid on the supporting plate 11-3. The manganese sand layers play a role in filtering and are also used as catalysts of low-valence iron ions in geothermal well water, the low-valence iron ions are converted into high-valence iron ions when passing through the manganese sand layers, the particle size of manganese sand of the fine manganese sand layers 11-4 is 0.3-1mm, the particle size of manganese sand of the medium manganese sand layers 11-5 is 1-5mm, the particle size of manganese sand of the coarse manganese sand layers 11-6 is 5-10mm, and filter cloth can be arranged between every two adjacent manganese sand layers in order to prevent the manganese sand particles of the fine manganese sand layers 11-4 from flowing to the medium manganese sand layers 11-5 and the coarse manganese sand layers 11-6.

The pebble grain diameter of the fine cobble layer 11-7 is 8-15mm, the pebble grain diameter of the middle cobble layer 11-8 is 15-30mm, the pebble grain diameter of the coarse cobble layer 11-9 is 30-60mm, and filter cloth can be arranged between the adjacent cobble layers and between the coarse manganese sand layer 11-5 and the fine cobble layer 11-7.

The return water mouth of floor heating pipe network is connected to the secondary side entry of floor heating heat exchanger 4 and is equipped with heat supply circulating pump 6 on the connecting pipeline, and the water inlet of floor heating pipe network is connected to the secondary side export of floor heating heat exchanger 4. Two sets of heat supply circulating pumps 6 are arranged in parallel, one use and one standby are realized, and the reliability of operation is improved.

The floor heating system further comprises a water source heat pump, wherein a secondary side outlet of the intermediate heat exchanger 8 is connected to an evaporator inlet of the water source heat pump through an intermediate circulating pump 5, an evaporator outlet of the water source heat pump is connected to a secondary side inlet of the intermediate heat exchanger 8, a condenser outlet of the water source heat pump is connected to a secondary side outlet of the floor heating heat exchanger 4, and a condenser inlet of the water source heat pump is connected to a secondary side inlet of the floor heating heat exchanger 4. After the heat energy in the geothermal well water tail water is exchanged and absorbed by the intermediate heat exchanger 8, the water source heat pump converts the low-level heat energy into the high-level heat energy and transmits the high-level heat energy to the floor heating pipe network. Two groups of intermediate circulating pumps 5 are arranged in parallel, so that one-use one-standby is realized, and the operation reliability is improved.

In this embodiment, the water source heat pump includes a first water source heat pump 12 and a second water source heat pump 13 which are arranged in parallel, an outlet of the intermediate circulating pump 5 is connected to inlets of evaporators of the first water source heat pump 12 and the second water source heat pump 13 at the same time, outlets of the evaporators of the first water source heat pump 12 and the second water source heat pump 13 are converged and then connected to a secondary side inlet of the intermediate heat exchanger 8; the outlets of the condensers of the first and second water

source heat pumps

12 and 13 are simultaneously connected to the secondary side outlet of the floor heating heat exchanger 4, and the inlets of the condensers of the first and second water

source heat pumps

12 and 13 are connected to the secondary side inlet of the floor heating heat exchanger 4. Through setting up parallel first water resource heat pump 12 and second water resource heat pump 13, guaranteed to the extraction of the heat energy that obtains of retrieving and to the transport of floor heating pipe network.

The water supply system comprises a water supply tank 15 and a water softening device 16, wherein the inlet of the water softening device 16 is connected to a tap water source through a pipeline, and the outlet of the water softening device is connected to the water source inlet of the water supply tank 15. The water replenishing tank 15 is used for storing a water replenishing source, and the water softening device 16 is used for softening the water replenishing source, removing ions contained in the water replenishing source and softening water.

The water softening device 16 is mainly used for removing calcium and magnesium ions in geothermal well water, and under the condition that the inlet water is deep well water or the hardness of a water source is high, the water softening device is used for removing the content of calcium and magnesium ions in the water so as to reduce the content of calcium and magnesium ions in the water. The demineralized water equipment is at the in-process of demineralized water, does not reduce the total salt content in aquatic, all has extensive application in boiler system, heat exchange system, industrial cooling system, central air conditioning system and other water equipment systems, does not have in this patent repeated description.

The water supply inlet of the make-up water tank 15 is connected to the inlet of the intermediate circulation pump 5 and the inlet of the heat supply circulation pump 6 by the constant pressure make-up water pump 14, that is, the water source in the make-up water tank 15 is supplied to the front of the intermediate circulation pump 5 and the front of the heat supply circulation pump 6 by the constant pressure make-up water pump 14. And water is supplemented to a water source in front of the intermediate circulating pump 5 and enters a circulating pipeline between the secondary side of the intermediate heat exchanger 8 and the evaporators of the first water source heat pump 12 and the second water source heat pump 13, and the water is supplemented to a circulating pipeline between the secondary side of the floor heating heat exchanger 4 and a floor heating pipe network, so that the water lost in the pipelines is supplemented.

In this embodiment, the system further includes a return line, one end of the return line is connected to a line between an outlet of the constant-pressure water replenishing pump 14 and an inlet of the heat supply circulating pump 6, and the other end of the return line is connected to the water replenishing tank 15. The return pipeline is used for backflow flow of water sources in the pipeline network, when the water sources supplemented into the pipeline network by the constant-pressure water replenishing pump 14 are excessive, the controller of the heating system controls corresponding valves on the pipeline to be opened/closed, the floor heating pipeline network and the water replenishing tank 15 are conducted through the return pipeline, and the excessive water in the floor heating pipeline network can flow back to the water replenishing tank 15 through the return pipeline to be stored.

In this embodiment, a dirt separator 7 is provided on the pipeline between the return water port of the floor heating pipe network and the inlet of the heat supply circulation pump 6. The dirt separator 7 is mainly used for filtering heating hot water in a pipe network, particle impurities contained in the heating hot water are filtered, the dirt separator 7 has multiple existing models, and the dirt separator has more applications in a heating system, and is not described herein any more.

Claims

1. A heating system using geothermy as a heating heat source comprises a geothermy exploitation well (1) and a geothermy recharge well (9); the method is characterized in that: the geothermal energy recovery system is characterized by further comprising a recharge pressure pump (3), a floor heating heat exchanger (4) and an intermediate heat exchanger (8), wherein an output pipeline extending from the geothermal exploitation well (1) is connected to the recharge pressure pump (3), an outlet of the recharge pressure pump (3) is connected to a primary side inlet of the floor heating heat exchanger (4), a primary side outlet of the floor heating heat exchanger (4) is connected to a primary side inlet of the intermediate heat exchanger (8), and a primary side outlet of the intermediate heat exchanger (8) is connected to a recharge pipeline of the geothermal recharge well (9); a water return port of the floor heating pipe network is connected to a secondary side inlet of the floor heating heat exchanger (4), a heat supply circulating pump (6) is arranged on a connecting pipeline, and a water inlet of the floor heating pipe network is connected to a secondary side outlet of the floor heating heat exchanger (4); the floor heating system is characterized by further comprising a water source heat pump, wherein a secondary side outlet of the intermediate heat exchanger (8) is connected to an evaporator inlet of the water source heat pump through an intermediate circulating pump (5), an evaporator outlet of the water source heat pump is connected to a secondary side inlet of the intermediate heat exchanger (8), a condenser outlet of the water source heat pump is connected to a secondary side outlet of the floor heating heat exchanger (4), and a condenser inlet of the water source heat pump is connected to a secondary side inlet of the floor heating heat exchanger (4); still include water charging system, water charging system includes moisturizing case (15) and softened water device (16), and the entry of softened water device (16) is connected to the water source entry of moisturizing case (15) through tube coupling to water source, exit linkage, and the water supply mouth of moisturizing case (15) is connected to the entry of intermediate circulating pump (5) and the entry of heat supply circulating pump (6) through level pressure moisturizing pump (14).

2. A heating system using geothermal heat as a heating source according to claim 1, wherein: the water source heat pump comprises a first water source heat pump (12) and a second water source heat pump (13) which are arranged in parallel, the outlet of the intermediate circulating pump (5) is simultaneously connected to the inlets of the evaporators of the first water source heat pump (12) and the second water source heat pump (13), and the outlets of the evaporators of the first water source heat pump (12) and the second water source heat pump (13) are converged and then connected to the secondary side inlet of the intermediate heat exchanger (8); the outlets of the condensers of the first water source heat pump (12) and the second water source heat pump (13) are simultaneously connected to the secondary side outlet of the floor heating heat exchanger (4), and the inlets of the condensers of the first water source heat pump (12) and the second water source heat pump (13) are connected to the secondary side inlets of the floor heating heat exchanger (4).

3. A heating system using geothermal heat as a heating source according to claim 2, wherein: a dirt remover is arranged on a pipeline between a water return port of the floor heating pipe network and an inlet of the heat supply circulating pump (6).

4. A heating system using geothermal heat as a heating source according to claim 3, wherein: still include whirl desander (2), the output pipeline that extends out by geothermal exploitation well (1) is connected with the entry of whirl desander (2), the export of whirl desander (2) and the entry linkage of recharging force (forcing) pump (3).

5. A heating system using geothermal heat as a heating source according to claim 4, wherein: the constant pressure water replenishing device also comprises a return pipeline, one end of the return pipeline is connected to a pipeline between an outlet of the constant pressure water replenishing pump (14) and an inlet of the heat supply circulating pump (6), and the other end of the return pipeline is connected to the water replenishing tank (15).

6. A heating system using geothermal heat as a heating source according to claim 5, wherein: and a filtering device (11) and an exhaust device (10) are also arranged on the recharging pipeline between the intermediate heat exchanger (8) and the geothermal recharging well (9).

7. A heating system using geothermal heat as a heating source according to claim 6, wherein: the exhaust device (10) comprises an exhaust tank (10-7), a water inlet (10-1) is formed in the middle of the top wall of the exhaust tank (10-7), a water outlet (10-8) is formed in the bottom of the side wall, a fan hole (10-6) is formed in the middle upper portion of the side wall of the exhaust tank (10-7), and a fan is mounted on the fan hole (10-6); a supporting plate (10-5) is arranged at the top of the inner cavity of the exhaust tank (10-7) and above the fan hole (10-6), and a first filter material layer (10-2), a second filter material layer (10-3) and a third filter material layer (10-4) are sequentially arranged on the supporting plate (10-5) from top to bottom.

8. A heating system using geothermal heat as a heating source according to claim 7, wherein: the filtering device (11) comprises a filtering tank (11-1), a water inlet (11-2) is formed in the top of the side wall of the filtering tank (11-1), a water outlet (11-10) is formed in the bottom of the side wall, a supporting plate (11-3) is arranged on the middle lower portion of the inner cavity of the filtering tank (11-1) and above the water outlet (11-10), and a fine manganese sand layer (11-4), a medium manganese sand layer (11-5), a coarse manganese sand layer (11-6), a fine cobble layer (11-7), a medium cobble layer (11-8) and a coarse cobble layer (11-9) are sequentially arranged on the supporting plate (11-3) from top to bottom.