CN216336977U

CN216336977U - Hot water source processing system of geothermal well

Info

Publication number: CN216336977U
Application number: CN202122577587.0U
Authority: CN
Inventors: 李洋洋; 葛强; 王峦; 邵春楠
Original assignee: Tianjin Century Tianyuan Group Co ltd
Current assignee: Tianjin Century Tianyuan Group Co ltd
Priority date: 2021-10-25
Filing date: 2021-10-25
Publication date: 2022-04-19
Anticipated expiration: 2031-10-25

Abstract

The utility model relates to a hot water source treatment system of a geothermal well. Comprising a geothermal well; a wellhead device is installed at the wellhead position of the geothermal well, an interface pipeline is installed on the wellhead device, a water taking pipe is connected below the interface pipeline, and an in-well sand filtering device is installed at the lower end of the water taking pipe; the chemical feeding device comprises a chemical pump and a source water pump, an inlet of the chemical pump is connected to an outlet of the chemical tank, an inlet of the source water pump is connected to an interface pipeline, a chemical flowmeter is mounted on an outlet pipeline of the chemical pump, an active water flowmeter is mounted on an outlet pipeline of the source water pump, and outlets of the chemical flowmeter and the source water flowmeter are both connected to a collecting pipe; and a filtering device and a water storage tank are further installed on the ground, the inlet of the filtering device is connected to the collecting pipe, and the outlet of the filtering device is connected to the inlet of the water storage tank. The utility model has reasonable structural design, effectively reduces the sand content of the geothermal water source and reduces the mineralization degree of the water source.

Description

Hot water source processing system of geothermal well

Technical Field

The utility model belongs to the technical field of geothermal facilities, and particularly relates to a hot water source processing system of a geothermal well.

Background

The geothermal heating system is a heating system using geothermal heat energy as a heat source. The geothermal heat-taking system is a system for extracting geothermal heat energy, and the extracted heat energy can be applied to the geothermal heating system and used as a heat source for heating and supplying heat. Generally, a geothermal heat extraction system is constructed based on a geothermal well facility which is drilled down into a rock formation in which a geothermal water source is stored, the geothermal water source flows into the bottom of the geothermal well, the geothermal water source is extracted to the ground for heat collection by lowering a water extraction pipe to the bottom of the geothermal well and installing a ground system on the ground surface, and the geothermal water source at the bottom of the geothermal well is pumped to the ground by a water pump. If the geothermal heating system is a system applying a 'heat-taking and water-not-taking technology', the geothermal water source needs to be recharged after heat collection.

In general, the geothermal rock formation contains a lot of sand grains, and during the process of taking water from the geothermal water source, the sand grains rise to the ground system along with the geothermal water source, and the sand grains contained in the water source cause problems such as abrasion and blockage of pipelines and equipment, thereby affecting the normal operation of the ground system. On the other hand, the geothermal water source generally has high mineralization degree, and is easy to form severe scale in equipment such as a plate heat exchanger when being used for a long time, and the cleaning after scale formation is difficult, and the geothermal water source needs to be gradually disassembled and installed for secondary use, so that the normal operation of a ground system is further influenced.

Therefore, in order to ensure the normal operation of the ground system and avoid the problems of blockage, abrasion, scaling and the like of pipelines and equipment, the geothermal water source needs to be treated. It is envisaged that the aforementioned technical problem will be addressed by reducing the sand content and mineralization of geothermal water sources, and that no treatment system of reasonable design exists in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model provides a hot water source treatment system of a geothermal well, which has reasonable structural design, effectively reduces the sand content of a geothermal water source and reduces the mineralization degree of the water source, and aims to solve the technical problems in the prior art.

The technical scheme adopted by the utility model for solving the technical problems in the prior art is as follows: a hot water source processing system of a geothermal well comprises the geothermal well; a wellhead device is installed at the wellhead position of the geothermal well, an interface pipeline is installed on the wellhead device, a water taking pipe is connected below the interface pipeline, and an in-well sand filtering device consisting of a coarse sand filter and a fine sand filter is installed at the lower end of the water taking pipe; the chemical feeding device comprises a chemical pump and a source water pump, an inlet of the chemical pump is connected to an outlet of the chemical tank, an inlet of the source water pump is connected to an interface pipeline, a chemical flowmeter is mounted on an outlet pipeline of the chemical pump, an active water flowmeter is mounted on an outlet pipeline of the source water pump, and outlets of the chemical flowmeter and the source water flowmeter are both connected to a collecting pipe; and a filtering device and a water storage tank are further installed on the ground, the inlet of the filtering device is connected to the collecting pipe, and the outlet of the filtering device is connected to the inlet of the water storage tank.

The utility model has the advantages and positive effects that:

compared with the existing geothermal water source treatment device or system, the geothermal water source treatment system provided by the utility model has the advantages that the sand filtering device in the well is arranged in the geothermal well, so that the sand filtering treatment of the geothermal water source is realized, large particles and small particles contained in the geothermal water source are filtered, the sand content of the geothermal water source is reduced, and the problems of abrasion, blockage and the like of pipelines and related equipment of the ground system cannot be caused when the geothermal water source with low sand content is lifted to the ground system. Through setting up charge device, realized the technical effect to online medicine in the geothermal water source, the ion composition in the geothermal water source after the medicine forms the sediment, therefore has reduced the mineralization degree of geothermal water source, has realized the softening treatment of water source promptly. Through setting up filter equipment, realized in time filtering sediment that forms in the geothermal water source to the online filtration treatment of adding medicine back geothermal water source, promoted the cleanliness factor of geothermal water source. The sand content and the mineralization degree of the geothermal water source treated by the treatment system are both obviously reduced, and the normal operation of subsequent pipelines and equipment is effectively ensured.

Preferably: the coarse sand filter comprises an outer shell with an opening at the bottom, the top of the outer shell is provided with a water outlet, the side part of the outer shell is provided with a water inlet, and a coarse sand filter screen is arranged inside the outer shell; a bottom cover is arranged on the bottom opening, and a pressing ring for tightly pressing the bottom edge of the coarse-filtration sand screen is arranged on the inner surface of the bottom cover.

Preferably: the fine sand filter comprises an outer pipeline, a fine sand filtering net with a top seal and a bottom opening is arranged in the outer pipeline, and an upper connecting end cover with a connecting sleeve is installed at the top of the outer pipeline.

Preferably: the upper end and the lower end of the outer pipeline are both provided with external threads, the inner wall of the upper connecting end cover is provided with internal threads, the inner wall of the water outlet is provided with internal threads, and the upper end of the outer pipeline is in threaded connection with the upper connecting end cover, and the lower end of the outer pipeline is in threaded connection with the water outlet.

Preferably: the wellhead device comprises a wellhead casing pipe, wherein a wellhead support is welded on the outer wall of the wellhead casing pipe; the interface pipeline comprises an interface tube which is provided with flanges and bent towards the side part, and the two flanges are in butt joint connection.

Preferably: and a medicament pipeline filter is arranged on a pipeline between the outlet of the medicament flowmeter and the collecting pipe, and a source water pipeline filter is arranged on a pipeline between the outlet of the source water flowmeter and the collecting pipe.

Preferably: the filter device comprises a booster pump, a first filter tank and a second filter tank, a water inlet pipe is installed at an inlet of the booster pump, a water delivery main pipe is connected to an outlet of the booster pump, two water delivery branch pipes are connected to the water source inlet of the first filter tank and the water source inlet of the second filter tank respectively, and a water outlet branch pipe and two water outlet branch pipes connected to the water outlet main pipe are connected to a water source outlet of the first filter tank and a water source outlet of the second filter tank respectively.

Preferably: the filter device also comprises a backwashing main pipe, wherein the backwashing main pipe is connected with two backwashing branch pipes which are respectively connected to backwashing ports of the first filter tank and the second filter tank; the water feeding main pipe is communicated with the backwashing main pipe, valves are arranged on the water feeding main pipe and the backwashing main pipe, and valves are arranged on the two water feeding branch pipes and the two backwashing branch pipes.

Preferably: the chemical adding device, the chemical box, the filtering device and the water storage tank are arranged in the heat preservation chamber; the outer wall of the water storage tank is provided with a heat insulation layer.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic cross-sectional view of the sand screen assembly of the well of FIG. 1;

FIG. 3 is a schematic view of the structure of the dosing device of FIG. 1;

fig. 4 is a schematic view of the structure of the filter device of fig. 1.

In the figure:

1. a coarse sand filter; 1-1, a bottom cover; 1-2, a shell; 1-3, a water inlet; 1-4, coarse-filtering a sand screen; 1-5, a water outlet; 2. a geothermal well; 3. a fine sand filter; 3-1, an outer pipeline; 3-2, fine sand filtering net; 3-3, connecting an end cover; 4. a wellhead assembly; 5. a water intake pipe; 6. an interface pipeline; 7. a dosing device; 7-1, a medicament pump; 7-2, a source water pump; 7-3, a medicament flow meter; 7-4, a medicament pipeline filter; 7-5, a source water flowmeter; 7-6, a source water pipeline filter; 7-7, a header pipe; 8. a kit; 9. a filtration device; 9-1, a water inlet pipe; 9-2, a booster pump; 9-3, a water supply pipe; 9-4, a first filter tank; 9-5, a second filter tank; 9-6, water outlet branch pipes; 9-7, backwashing the branch pipes; 9-8, a water outlet main pipe; 9-9, a backwashing main pipe; 9-10 parts of a water supply main pipe; 10. a water storage tank.

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 system for treating a hot water source of a geothermal well according to the present invention includes a geothermal well 2; a wellhead device 4 is installed at the wellhead position of the geothermal well 2, an interface pipeline 6 is installed on the wellhead device 4, a water taking pipe 5 is connected below the interface pipeline 6, and an in-well sand filtering device consisting of a coarse sand filter 1 and a fine sand filter 3 is installed at the lower end of the water taking pipe 5.

The wellhead device 4 is used for fixedly installing the interface pipeline 6 and the water taking pipe 5 and sealing the wellhead of the geothermal well 2. The water intake pipe 5 is communicated with the interface pipeline 6 in a butt joint mode, and the geothermal water source is lifted through the water intake pipe 5 and discharged from the interface pipeline 6 to be taken by subsequent equipment. The sand filtering device in the well is used for carrying out sand filtering treatment on the geothermal water source, wherein the coarse sand filter 1 is used for carrying out coarse filtering treatment on the geothermal water source to remove contained large-particle sand grains, and the fine sand filter 3 is used for carrying out fine filtering treatment on the geothermal water source to remove contained small-particle sand grains. The sand content of geothermal water source passing through the sand filtering device in the well is obviously reduced.

In the embodiment, the wellhead device 4 comprises a wellhead casing pipe, wherein a wellhead support is welded on the outer wall of the wellhead casing pipe, and a flange plate is arranged at the upper end of the wellhead casing pipe; the interface pipeline 6 comprises an interface tube which is provided with flanges and is bent towards the side part, and the two flanges are in butt joint connection. The wellhead support is fixedly connected with the wellhead ground, the wellhead casing is inserted into the wellhead of the geothermal well 2, the upper end of the water intake pipe 5 is in butt joint connection with the lower end of the connector pipe of the connector pipeline 6, and a complete water source passage is formed.

Referring to fig. 2, it can be seen that:

the coarse sand filter 1 comprises an outer shell 1-2 with an opening at the bottom, a water outlet 1-5 is arranged at the top of the outer shell 1-2, a water inlet 1-3 is arranged at the side part, and a coarse sand filter 1-4 is arranged inside the coarse sand filter; a bottom cover 1-1 is arranged on the bottom opening, a pressing ring for tightly pressing the bottom edge of the coarse-filtration sand screen 1-4 is arranged on the inner surface of the bottom cover 1-1, and the top edge of the coarse-filtration sand screen 1-4 is abutted against a boss in the shell 1-2. The geothermal water source enters the shell 1-2 from the water inlet 1-3, large-particle sand grains are intercepted when the geothermal water source passes through the coarse filtering sand screen 1-4, and the filtered geothermal water source passes through the water outlet 1-5 upwards.

The fine sand filter 3 comprises an outer pipeline 3-1, a fine sand filter net 3-2 with a top seal and a bottom opening is arranged inside the outer pipeline 3-1, and an upper connecting end cover 3-3 with a connecting sleeve is arranged at the top of the outer pipeline 3-3. As shown in the figure, the connecting sleeve is positioned in the middle of the top of the upper connecting end cover 3-3 and is provided with an external thread part, the lower end of the water taking pipe 5 is provided with internal threads, and the water taking pipe 5 is in threaded connection with the connecting sleeve, so that the sand filtering device in the well is installed and fixed at the lower end of the water taking pipe 5. The outer diameter of the fine sand filtering net 3-2 is equal to the inner diameter of the outer pipeline 3-1, the fine sand filtering net 3-2 is placed in the outer pipeline 3-1 and is not fixed, so that when the geothermal water source passes through the outer pipeline 3-1 upwards, the fine sand filtering net 3-2 can float up and down under the scouring action of water flow, a certain vibration effect is generated, the falling of sand grains in meshes is promoted, and the fine sand filtering net 3-2 is prevented from being blocked by the sand grains to a certain extent.

In the embodiment, the upper end and the lower end of the outer pipeline 3-1 are both provided with external threads, the inner wall of the upper connecting end cover 3-3 is provided with internal threads, the inner wall of the water outlet 1-5 is provided with internal threads, the upper end of the outer pipeline 3-1 is in threaded connection with the upper connecting end cover 3-3, and the lower end of the outer pipeline is in threaded connection with the water outlet 1-5.

The chemical adding device 7 and the chemical box 8 are installed on the ground, and the filtering device 9 and the water storage tank 10 are also installed on the ground. Wherein, charge device 7 is arranged in adding the sediment medicament to the geothermal water source, promotes the ion formation in the water source to deposit and carries out softening treatment to the geothermal water source promptly, is equipped with the sediment medicament in the medicament case 8, and filter equipment 9 carries out filtration treatment to the geothermal water source after adding the medicine reaction, and the deposit that the filtering generated makes the geothermal water source clean, finally the geothermal water source gets into and stores in water storage tank 10.

Considering that certain calorific loss can take place in adding medicine processing link, filtration processing link and water storage link, in this embodiment, in order to reduce this kind of calorific loss, promote the thermal utilization ratio in the geothermal water source, still be provided with the heat preservation room subaerial. The dosing device 7, the chemical box 8, the filtering device 9 and the water storage tank 10 are arranged in a heat preservation chamber, and a heat preservation layer is further arranged on the outer wall of the water storage tank 10, so that the heat loss of the geothermal water source in the water storage link is further reduced.

Referring to fig. 3, it can be seen that:

the medicine adding device 7 comprises a medicine pump 7-1 and a source water pump 7-2, an inlet of the medicine pump 7-1 is connected to an outlet of the medicine box 8, an inlet of the source water pump 7-2 is connected to a connector pipe of the connector pipeline 6, the medicine pump 7-1 and the source water pump 7-2 respectively provide flowing power for the medicine and the geothermal water source, and the medicine pump 7-1 is selected to be a peristaltic pump. The outlet pipeline of the medicament pump 7-1 is provided with a medicament flow meter 7-3, the outlet pipeline of the source water pump 7-2 is provided with a source water flow meter 7-5, and the outlets of the medicament flow meter 7-3 and the source water flow meter 7-5 are both connected to a collecting pipe 7-7.

The medicament flow meter 7-3 is used for metering the flow of the medicament, and the source water flow meter 7-5 is used for metering the flow of the geothermal water source. In order to achieve better mixing ratio of the medicament and the water source, the flow of the medicament and the geothermal water source is measured by a medicament flowmeter 7-3 and a source water flowmeter 7-5, flow values measured by the two flowmeters are fed back to a controller of the medicament feeding device 7, and the controller adjusts the working states of the medicament pump 7-1 and the source water pump 7-2 according to a set ratio relationship to realize accurate ratio between the medicament and the water source.

In this embodiment, a chemical pipeline filter 7-4 is installed on a pipeline between the outlet of the chemical flow meter 7-3 and the collection pipe 7-7, and a source water pipeline filter 7-6 is installed on a pipeline between the outlet of the source water flow meter 7-5 and the collection pipe 7-7. The medicament pipeline filter 7-4 and the source water pipeline filter 7-6 respectively provide an online filtering function for the medicament pipeline and the water source pipeline to remove particulate impurities in the medicament and the water source.

The inlet of the filter unit 9 is connected to the manifold 7-7 and the outlet of the filter unit 9 is connected to the inlet of the water storage tank 10.

Referring to fig. 4, it can be seen that:

the filtering device 9 comprises a booster pump 9-2, a first filtering tank 9-4 and a second filtering tank 9-5, wherein a water inlet pipe 9-1 is arranged at the inlet of the booster pump 9-2, and the first filtering tank 9-4 and the second filtering tank 9-5 work synchronously or are used for one by one. As shown in the figure, in order to improve the operation reliability of the device, two booster pumps 9-2 are arranged in parallel to form a one-use-one-standby use mode, a water inlet pipe 9-1 is simultaneously connected with inlets of the two booster pumps 9-2, and the water inlet pipe 9-1 is connected with a collecting pipe 7-7 through a pipeline.

The outlets of the booster pumps 9-2 are connected with water delivery main pipes 9-10, and the water delivery main pipes 9-10 are simultaneously connected with the outlets of the two booster pumps 9-2. Two water supply branch pipes 9-3 are connected to the water supply main pipe 9-10, the two water supply branch pipes 9-3 are respectively connected to water source inlets of the first filtering tank 9-4 and the second filtering tank 9-5, water outlet branch pipes 9-6 are connected to water source outlets of the first filtering tank 9-4 and the second filtering tank 9-5, and the two water outlet branch pipes 9-6 are connected to one water outlet main pipe 9-8. The water outlet main pipe 9-8 is connected with the inlet of the water storage tank 10 through a pipeline. The water supply main pipe 9-10 respectively supplies geothermal water sources to the first filtering tank 9-4 and the second filtering tank 9-5 through the water supply branch pipe 9-3, the geothermal water sources after being filtered are discharged through the two water outlet branch pipes 9-6, and the geothermal water sources are collected to the water outlet main pipe 9-8 and then are conveyed to the water storage tank 10.

The filtering device 9 also comprises a backwashing main pipe 9-9, the backwashing main pipe 9-9 is connected with two backwashing branch pipes 9-7, and the two backwashing branch pipes 9-7 are respectively connected with backwashing ports of the first filtering tank 9-4 and the second filtering tank 9-5. And backwashing water sources are injected into the first filtering tank 9-4 and the second filtering tank 9-5 through the backwashing main pipe 9-9 and the two backwashing branch pipes 9-7 to perform backwashing on the filter material layer in the filtering tanks.

Both the first filtration tank 9-4 and the second filtration tank 9-5 are existing components, and are commercially available. Structurally, including a jar body, be equipped with a plurality of filter layers (including but not limited to rubble filter material layer, ceramic granule filter material layer, active carbon filter material layer etc.) at the middle part of body, in the lower extreme of flow pipe extended to the space of each filter layer below, the lower extreme of outlet pipe was located the top of each filter layer, therefore geothermal water source was sent into the bottom of filtering jar by the flow pipe, later upwards obtains filtration purification through each filter layer, later discharges from the outlet pipe. The lower end of the backwashing pipe is positioned above each filter layer, a backwashing water source is sent into the filter tank by the backwashing pipe, each filter layer is reversely washed from top to bottom, impurities adsorbed in the filter material are separated from the filter material, and the water source after reverse washing is discharged from a water outlet at the bottom of the filter tank. The water supply main pipe 9-10 is communicated with the backwashing main pipe 9-9, and the backwashing device (comprising a backwashing pump and a pipeline thereof, not shown in the figure) is connected with the backwashing main pipe 9-9.

As shown in the figure, in the embodiment, valves are arranged on the water supply main pipe 9-10 and the backwashing main pipe 9-9, and valves are arranged on the two water supply branch pipes 9-3 and the two backwashing branch pipes 9-7. The working state of the hot water source treatment system is switched by controlling the valves to be opened and closed: mode switching of simultaneous access work of two filter tanks or access work of only one of the filter tanks can be realized by operating the on-off of the valves on the two water feeding branch pipes 9-3 and the two backwashing branch pipes 9-7; closing the valves on the backwashing main pipes 9-9 and opening the valves on the water supply main pipes 9-10, so that the filtering device 9 works in a normal filtering mode; the filter unit 9 is operated in a backwash mode by opening the valves on the backwash header 9-9 and closing the valves on the water supply header 9-10.

Claims

1. A hot water source treatment system for a geothermal well, comprising a geothermal well (2); the method is characterized in that: a wellhead device (4) is installed at the wellhead position of the geothermal well (2), an interface pipeline (6) is installed on the wellhead device (4), a water taking pipe (5) is connected below the interface pipeline (6), and an in-well sand filtering device consisting of a coarse sand filter (1) and a fine sand filter (3) is installed at the lower end of the water taking pipe (5); a dosing device (7) and a medicament box (8) are installed on the ground, the dosing device (7) comprises a medicament pump (7-1) and a source water pump (7-2), an inlet of the medicament pump (7-1) is connected to an outlet of the medicament box (8), an inlet of the source water pump (7-2) is connected to an interface pipeline (6), a medicament flow meter (7-3) is installed on an outlet pipeline of the medicament pump (7-1), a source water flow meter (7-5) is installed on an outlet pipeline of the source water pump (7-2), and outlets of the medicament flow meter (7-3) and the source water flow meter (7-5) are both connected to a manifold (7-7); and a filtering device (9) and a water storage tank (10) are further mounted on the ground, the inlet of the filtering device (9) is connected to the collecting pipe (7-7), and the outlet of the filtering device (9) is connected to the inlet of the water storage tank (10).

2. The system for treating a hot water source of a geothermal well according to claim 1, wherein: the coarse sand filter (1) comprises an outer shell (1-2) with an opening at the bottom, a water outlet (1-5) is arranged at the top of the outer shell (1-2), a water inlet (1-3) is arranged at the side part, and a coarse sand filter screen (1-4) is arranged inside the coarse sand filter screen; a bottom cover (1-1) is arranged on the bottom opening, and a pressing ring for tightly pressing the bottom edge of the coarse-filtration sand screen (1-4) is arranged on the inner surface of the bottom cover (1-1).

3. The system for treating a hot water source of a geothermal well according to claim 2, wherein: the fine sand filter (3) comprises an outer pipeline (3-1), a fine sand filtering net (3-2) with a top seal and a bottom opening is arranged in the outer pipeline (3-1), and an upper connecting end cover (3-3) with a connecting sleeve is arranged at the top of the outer pipeline (3-1).

4. A hot water source treatment system for a geothermal well according to claim 3, wherein: the upper end and the lower end of the outer pipeline (3-1) are both provided with external threads, the inner wall of the upper connecting end cover (3-3) is provided with internal threads, the inner wall of the water outlet (1-5) is provided with internal threads, the upper end of the outer pipeline (3-1) is in threaded connection with the upper connecting end cover (3-3), and the lower end of the outer pipeline is in threaded connection with the water outlet (1-5).

5. The system for treating a hot water source of a geothermal well according to claim 4, wherein: the wellhead device (4) comprises a wellhead casing pipe, wherein a wellhead support is welded on the outer wall of the wellhead casing pipe, and a flange plate is arranged at the upper end of the wellhead casing pipe; the interface pipeline (6) comprises an interface tube which is provided with flanges and is bent towards the side part, and the two flanges are in butt joint connection.

6. The system for treating a hot water source of a geothermal well according to claim 5, wherein: a medicament pipeline filter (7-4) is arranged on a pipeline between the outlet of the medicament flowmeter (7-3) and the collecting pipe (7-7), and a source water pipeline filter (7-6) is arranged on a pipeline between the outlet of the source water flowmeter (7-5) and the collecting pipe (7-7).

7. The system for treating a hot water source of a geothermal well according to claim 6, wherein: the filtering device (9) comprises a booster pump (9-2), a first filtering tank (9-4) and a second filtering tank (9-5), a water inlet pipe (9-1) is arranged at the inlet of the booster pump (9-2), a water delivery main pipe (9-10) is connected with the outlet of the booster pump (9-2), two water supply branch pipes (9-3) are connected on the water supply main pipe (9-10), the two water supply branch pipes (9-3) are respectively connected to the water source inlets of the first filtering tank (9-4) and the second filtering tank (9-5), the water source outlets of the first filtering tank (9-4) and the second filtering tank (9-5) are connected with water outlet branch pipes (9-6), and the two water outlet branch pipes (9-6) are connected to a water outlet main pipe (9-8).

8. The system for treating a hot water source of a geothermal well according to claim 7, wherein: the filtering device (9) also comprises a backwashing main pipe (9-9), the backwashing main pipe (9-9) is connected with two backwashing branch pipes (9-7), and the two backwashing branch pipes (9-7) are respectively connected to backwashing ports of the first filtering tank (9-4) and the second filtering tank (9-5); the water feeding main pipe (9-10) is communicated with the backwashing main pipe (9-9), valves are arranged on the water feeding main pipe (9-10) and the backwashing main pipe (9-9), and valves are arranged on the two water feeding branch pipes (9-3) and the two backwashing branch pipes (9-7).

9. The system for treating a hot water source of a geothermal well according to claim 8, wherein: the device also comprises a heat preservation chamber, wherein the dosing device (7), the chemical box (8), the filtering device (9) and the water storage tank (10) are arranged in the heat preservation chamber; the outer wall of the water storage tank (10) is provided with a heat-insulating layer.