A geothermal heat well

Abstract

The present invention relates to the technical field of geothermal energy extraction equipment, and its purpose is to provide a geothermal energy heat extraction well. This geothermal energy heat extraction well can realize impurity cleaning, avoid internal blockage, and ensure the normal operation of the heat extraction well. The above-mentioned geothermal energy heat extraction well includes: a well body, a heat exchanger, a pipeline assembly and a descaling assembly. The heat exchanger is arranged in the well body, one end of which is located in the cavity of the well body, and the other end extends out of the well body; the pipeline assembly is arranged in the well body, including an inlet pipe and an outlet pipe, the inlet pipe extends into the cavity to supply cold water to the cavity, and the outlet pipe extends into the cavity to discharge hot water; the descaling assembly includes a rotating mechanism and a scraper mechanism, the rotating mechanism is arranged in the well body, and a plurality of scraper mechanisms are arranged on the rotating mechanism, and the rotating mechanism is used to drive the scraper mechanism to rotate to scrape off the dirt on the wall of the cavity. The present invention solves the problem that the geothermal energy heat extraction well in the prior art cannot clean the accumulated impurities, resulting in internal blockage, which affects the normal operation of the heat extraction well.

Description

Technical Field

[0001] The invention relates to the technical field of geothermal energy extraction equipment, and in particular to a geothermal energy heat extraction well. Background Art

[0002] Geothermal energy is natural heat extracted from the earth's crust. This energy comes from the molten rock inside the earth and exists in the form of heat. The use of geothermal energy can contribute to sustainable energy supply, reduce dependence on traditional energy, and reduce the impact on the environment.

[0003] The simplest and most cost-effective method of geothermal energy is to directly access these heat sources and extract their energy. At present, one of the modes for the development of medium and deep geothermal energy is the non-interference geothermal mode. This mode is to extract heat without taking water: one end of the heat exchanger of the geothermal energy well is located in the deep underground heat reservoir to extract geothermal energy, and the other end is located inside the well. The heat exchanger absorbs geothermal energy through the internal medium circulation and heats the cold water sent into the well. The hot water carrying heat is then returned to the ground for use, completing the extraction of geothermal energy. However, during the long-term use of this geothermal energy well, the impurities carried by the water circulating in the well will accumulate on the wall to form dirt. In severe cases, it will cause blockage inside the pipeline, affecting the normal operation of the well. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the geothermal energy heating well in the prior art cannot clean the accumulated impurities, resulting in internal blockage and affecting the normal operation of the heating well, thereby providing a geothermal energy heating well that can clean the impurities, avoid internal blockage and ensure the normal operation of the heating well.

[0005] In order to solve the above problems, the present invention provides a geothermal energy heat extraction well, comprising:

[0006] A well body, wherein the well body has a cavity;

[0007] A heat exchanger, wherein the heat exchanger is disposed in the well body, with one end of the heat exchanger being located in the cavity and the other end of the heat exchanger extending out of the well body;

[0008] A pipe assembly, the pipe assembly is arranged in the well body, and comprises a water inlet pipe and a water outlet pipe, one end of the water inlet pipe extends into the cavity to supply cold water into the cavity, and one end of the water outlet pipe extends into the cavity to discharge hot water generated by heating the cold water in the cavity;

[0009] A descaling component, the descaling component includes: a rotating mechanism and a scraper mechanism, the rotating mechanism is arranged on the well body, the scraper mechanism is located in the cavity, and a plurality of scraper mechanisms are arranged on the rotating mechanism, the rotating mechanism is used to drive the scraper mechanism to rotate to scrape off the dirt on the wall of the cavity.

[0010] Optionally, the rotating mechanism includes: a driving member and a rotating shaft, the driving end of the driving member is connected to the rotating shaft, and a plurality of scraper mechanisms are arranged on the rotating shaft around the circumference of the rotating shaft.

[0011] Optionally, the scraper mechanism includes: a connecting member and a scraper, one end of the connecting member is connected to the rotating shaft, the scraper is arranged on the connecting member, and a water hole is provided on the scraper.

[0012] Optionally, the cavity includes: a heating chamber and a heat preservation chamber that are connected, one end of the water inlet pipe extends into the heating chamber, and the heat exchanger and the scraper mechanism are both located in the heating chamber, and one end of the water outlet pipe extends into the heat preservation chamber.

[0013] Optionally, the heating chamber and the heat preservation chamber are connected via a pumping mechanism, and the pumping mechanism includes a first pumping member arranged on the well body, wherein a water inlet end of the first pumping member is connected to the heating chamber, and a water outlet end is connected to the heat preservation chamber.

[0014] Optionally, the pumping mechanism further includes: a heat sink and a dustproof net, wherein the heat sink is arranged on the first water pumping member, and the dustproof net is arranged on the side wall of the well body and corresponds to the position of the heat sink.

[0015] Optionally, the heat preservation chamber is provided with a heat preservation mechanism, and the heat preservation mechanism includes a heater.

[0016] Optionally, the heat preservation mechanism further includes: a rotating shaft and a mounting plate arranged on the rotating shaft, the rotating shaft is connected to the driving end of the driving member, the heater is located in the mounting plate, and a water passage is arranged on the mounting plate.

[0017] Optionally, the pipeline assembly further includes a second water pumping member, which is disposed in the well body and has a water inlet connected to the other end of the water outlet pipe.

[0018] Optionally, a vacuum chamber is provided on the side wall of the well body.

[0019] The present invention has the following advantages:

[0020] 1. The geothermal energy well provided by the present invention comprises: a well body, a heat exchanger, a pipe assembly and a descaling assembly. The heat exchanger is arranged in the well body, one end of which is located in the cavity of the well body, and the other end extends out of the well body. The pipe assembly is arranged in the well body, including an inlet pipe and an outlet pipe, one end of which extends into the cavity to supply cold water into the cavity; after the cold water enters the cavity, the heat exchanger absorbs geothermal energy and heats the cold water into hot water. One end of the outlet pipe also extends into the cavity to discharge the hot water. The descaling assembly comprises a rotary mechanism and a scraper mechanism, the rotary mechanism is arranged in the well body, and a plurality of scraper mechanisms are arranged on the rotary mechanism, the rotary mechanism drives the scraper mechanism to rotate, and then scrapes off the dirt on the cavity wall. By arranging the descaling assembly, the geothermal energy well has a self-cleaning function. After the geothermal energy well has been used for a period of time, the descaling assembly can be started to scrape off the dirt on the well body to avoid internal blockage.

[0021] 2. The geothermal energy well provided by the present invention has a rotary mechanism comprising: a driving member and a rotating shaft, wherein the driving end of the driving member is connected to the rotating shaft. The scraper mechanism comprises: a connecting member and a scraper, wherein one end of the connecting member is connected to the rotating shaft, and the scraper is arranged on the connecting member. The scraper scrapes dirt off the wall surface during rotation. In addition, a water hole is provided on the scraper to reduce the water flow resistance during the rotation of the scraper. This descaling assembly has a simple structure, is practical and reliable.

[0022] 3. The geothermal energy well provided by the present invention comprises a cavity including a heating cavity and a heat preservation cavity which are connected. The water inlet end of the first pumping member is connected to the heating cavity, and the water outlet end is connected to the heat preservation cavity. One end of the water inlet pipe extends into the heating cavity, and the heat exchanger and the scraper mechanism are both located in the heating cavity, and one end of the water outlet pipe extends into the heat preservation cavity. Cold water enters the heating cavity for heating, and the hot water after heating enters the heat preservation cavity for storage, so that it can be taken at any time later.

[0023] 4. The geothermal energy heat extraction well provided by the present invention has an extraction mechanism including: a first water pumping part, a heat sink and a dustproof net, wherein the heat sink is arranged on the first water pumping part, and the dustproof net is arranged on the side wall of the well body and corresponds to the position of the heat sink. By arranging the heat sink, the first water pumping part can be timely cooled to prevent the first water pumping part from being damaged due to continuous high working temperature. The dustproof net can provide an air duct for the heat sink to facilitate air circulation and improve the heat dissipation effect, and can also prevent dust from entering the well body.

[0024] 5. The geothermal energy well provided by the present invention has a heat preservation chamber provided with a heat preservation mechanism, which includes a heater. The hot water is heat-insulated by the heater to prevent the water temperature from decreasing and becoming unusable.

[0025] 6. The geothermal energy heat extraction well provided by the present invention, the heat preservation mechanism also includes: a rotating shaft and a mounting plate arranged on the rotating shaft, the rotating shaft is connected to the driving end of the driving member, the heater is located in the mounting plate, and the mounting plate is provided with a water passage. The provision of the water passage is conducive to accelerating the heat absorption of the liquid, thereby improving the heating efficiency.

[0026] 7. The geothermal energy extraction well provided by the present invention has a vacuum cavity provided on the side wall of the well body. The vacuum cavity can effectively reduce the heat loss and loss inside the well body and improve the efficiency of geothermal energy extraction and utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A schematic diagram of a geothermal energy heat extraction well according to the present invention;

[0029] Figure 2 A cross-sectional view of a geothermal energy heat extraction well according to the present invention;

[0030] Figure 3 for Figure 2 A magnified schematic diagram of part A;

[0031] Figure 4 A schematic diagram of a scraper mechanism in a geothermal energy heat extraction well of the present invention;

[0032] Figure 5 It is a schematic diagram of the heat preservation mechanism in the geothermal energy heat extraction well of the present invention.

[0033] Description of reference numerals:

[0034] 1. well body, 11. heating chamber, 12. heat preservation chamber, 13. vacuum chamber;

[0035] 2. Heat exchanger;

[0036] 31. water inlet pipe, 32. water outlet pipe, 33. second pumping member;

[0037] 41. Rotating mechanism, 411. Driving member, 412. Rotating shaft, 42. Scraper mechanism, 421. Connecting member, 422. Scraper;

[0038] 5. a pumping mechanism, 51. a first pumping member, 52. a heat sink, 53. a dust screen;

[0039] 61. Heater, 62. Rotating shaft, 63. Mounting plate, 64. Guide groove, 65. Through hole. DETAILED DESCRIPTION

[0040] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0044] like Figure 1 , Figure 2As shown, it is a preferred embodiment of the geothermal energy heat extraction well of the present invention. This geothermal energy heat extraction well includes: a well body 1, a heat exchanger 2, a pipe assembly and a descaling assembly. The well body 1 has a cavity inside, which is a heat exchange area. The heat exchanger 2 is arranged in the well body 1, and one end of the heat exchanger 2 is located in the cavity of the well body 1, and the other end extends out of the well body 1. The function of the heat exchanger 2 is to extract geothermal energy, and extract the geothermal energy outside the well body 1 to the cavity for utilization. The pipe assembly is arranged in the well body 1, and the pipe assembly includes an inlet pipe 31 and an outlet pipe 32. One end of the inlet pipe 31 extends into the cavity, and the other end is connected to an external water supply device for supplying cold water into the cavity. One end of the outlet pipe 32 also extends into the cavity, but the other end is connected to a device that needs hot water, which is used to discharge the hot water after the cold water is heated by geothermal energy. Cold water enters the cavity through the water inlet pipe 31, and the heat exchanger 2 absorbs geothermal energy and gradually heats the cold water into hot water, which is discharged through the water outlet pipe 32, thus completing the extraction and utilization of geothermal energy. The descaling component includes a rotary mechanism 41 and a plurality of scraper mechanisms 42, the rotary mechanism 41 is arranged on the well body 1, the scraper mechanism 42 is located in the cavity, and the plurality of scraper mechanisms 42 are arranged on the rotary mechanism 41, the rotary mechanism 41 drives the scraper mechanism 42 to rotate, and then the scraper 422 assembly scrapes off the dirt on the cavity wall. By setting up the descaling component, the geothermal energy well has a self-cleaning function. After the geothermal energy well has been used for a period of time, the descaling component can be started to scrape off the dirt on the cavity wall to avoid the accumulation of impurities and internal blockage.

[0045] Furthermore, the cavity includes: a heating cavity 11 and a heat preservation cavity 12 which are connected to each other. The shape of the heating cavity 11 is as follows: Figure 2 As shown, the upper half is cylindrical and the lower half is truncated cone. One end of the water inlet pipe 31 extends into the heating chamber 11 to supply cold water to the heating chamber 11. The heat exchanger 2 and the scraper mechanism 42 are also located in the heating chamber 11, and the heat exchanger 2 is located in the upper half of the heating chamber 11, and the scraper mechanism 42 is located in the lower half of the heating chamber 11, and the heating of the cold water is completed in the heating chamber 11. The shape of the insulation chamber 12 is cylindrical, and one end of the water outlet pipe 32 extends into the insulation chamber 12. The heated hot water will be discharged from the heating chamber 11 into the insulation chamber 12 for insulation storage, and can be extracted from the insulation chamber 12 at any time when water is used. Specifically, in this embodiment, the insulation chamber 12 is located directly above the heating chamber 11, and the water inlet pipe 31 passes through the insulation chamber 12 and enters the heating chamber 11, so that the cold water in the water inlet pipe 31 can be preheated by the hot water in the insulation chamber 12. Furthermore, the hot water in the heat preservation chamber 12 also keeps the hot water flowing in the water outlet pipe 32 warm, thereby reducing the heat damage of the hot water when flowing in the water outlet pipe 32 .

[0046] In other embodiments, the cavity may also be a complete cavity without being divided into the heating cavity 11 and the heat preservation cavity 12 .

[0047] In addition, a vacuum chamber 13 is provided on the side wall of the well body 1. Figure 2 As shown, the vacuum chamber 13 surrounds the side wall of the well body 1. The provision of the vacuum chamber 13 can reduce heat exchange inside and outside the well body 1, reduce heat loss, and ensure a higher geothermal energy extraction and utilization efficiency.

[0048] In other embodiments, the vacuum chamber 13 may not be provided, but a thermal insulation paint, coating or thermal insulation board may be provided on the outer wall of the well body 1, which can also achieve a similar effect.

[0049] The descaling assembly includes a rotating mechanism 41 and a scraper mechanism 42. The rotating mechanism 41 includes: a driving member 411 and a rotating shaft 412, and the driving end of the driving member 411 is connected to the rotating shaft 412 to drive the rotating shaft 412 to rotate. A plurality of scraper mechanisms 42 are arranged on the rotating shaft 412 around the circumference of the rotating shaft 412, and then when the driving member 411 drives the rotating shaft 412 to rotate, each scraper mechanism 42 can be driven to rotate synchronously. Specifically, in this embodiment, the driving member 411 is preferably a motor, which is arranged on the top surface of the well body 1. There are four scraper mechanisms 42 in total, which are evenly arranged along the circumference of the rotating shaft 412.

[0050] Of course, in other embodiments, the number of the scraper mechanisms 42 may also be two, three, six, etc.

[0051] Further, such as Figure 4 As shown, the scraper mechanism 42 includes: a connector 421 and a scraper 422. One end of the connector 421 is connected to the rotating shaft 412, that is, the connector 421 is arranged perpendicular to the rotating shaft 412. The scraper 422 is arranged on the connector 421, and a water hole is provided on the scraper 422 to facilitate water circulation and reduce the water resistance when the scraper 422 rotates. Specifically, in this embodiment, the connector 421 is a square rod, the scraper 422 is a trapezoidal plate, and the long side of the scraper 422 is connected to the bottom end of the connector 421, and the hypotenuse is located on the side away from the rotating shaft 412. The trapezoidal scraper 422 matches the shape of the heating chamber 11, so that dirt can be better removed.

[0052] In other embodiments, the shape of the scraper 422 may also change with the shape of the heating chamber 11. For example, when the shape of the heating chamber 11 is cylindrical, the shape of the scraper 422 may also change to a square plate accordingly.

[0053] Further, a heat preservation mechanism is provided in the heat preservation chamber 12, and the heat preservation mechanism includes a heater 61. By starting the heater 61, the hot water is continuously heated and kept warm, so as to prevent the hot water from cooling down when being stored in the heat preservation chamber 12.

[0054] Furthermore, Figure 5As shown, the heat preservation mechanism also includes: a rotating shaft 62 and a mounting plate 63 arranged on the rotating shaft 62. The rotating shaft 62 is connected to the driving end of the driving member 411, that is, the rotating shaft 62 and the rotating shaft 412 are coaxially connected and are driven by the driving member 411. The heater 61 is located in the mounting plate 63, and a water passage is provided on the mounting plate 63, so that the hot water can contact the heater 61 through the water passage for heating and heat preservation. Specifically, in this embodiment, four mounting plates 63 are also provided on the rotating shaft 62. And the water passage includes a guide groove 64 arranged on the adjacent side of the rotating shaft 62 and a through hole 65 arranged on the side away from the rotating shaft 62. The circulation of hot water between the guide groove 64 and the through hole 65 is conducive to accelerating the heat reception, thereby improving the heating efficiency.

[0055] In other embodiments, through holes 65 may be provided on all sides of the mounting plate 63 , or guide grooves 64 may be provided on all sides of the mounting plate 63 .

[0056] Of course, in other embodiments, another driving member 411 may be provided to independently drive the rotating shaft 62 to rotate.

[0057] Furthermore, the heating chamber 11 and the heat preservation chamber 12 are connected through the extraction mechanism 5. Figure 3 As shown, the pumping mechanism 5 includes a first pumping member 51 disposed on the well body 1, the water inlet end of the first pumping member 51 is connected to the heating chamber 11, and the water outlet end is connected to the heat preservation chamber 12, and the hot water in the heating chamber 11 can be pumped into the heat preservation chamber 12 through the first pumping member 51. Specifically, the first pumping member 51 is preferably a water pump.

[0058] The extraction mechanism 5 also includes: a heat sink 52 and a dustproof net 53. The heat sink 52 is in the shape of a fin and is arranged on the first water pumping member 51, and is used for heat dissipation and cooling of the first water pumping member 51 to prevent the first water pumping member 51 from being damaged due to excessive heat generation during long-term operation. The dustproof net 53 is arranged on the side wall of the well body 1 and corresponds to the position of the heat sink 52. The dustproof net 53 provides a channel for air circulation at the first water pumping member 51, which is beneficial for heat exchange of the heat sink 52 and can prevent dust from entering the well body 1.

[0059] In addition to the water inlet pipe 31 and the water outlet pipe 32, the pipeline assembly also includes a second pumping member 33, which is arranged on the well body 1, and the water inlet of the second pumping member 33 is connected to the other end of the water outlet pipe 32. The second pumping member 33 is preferably a water pump, which is used to extract the hot water in the heat preservation chamber 12 for use.

[0060] The working process of the geothermal energy heat extraction well in this embodiment is described as follows:

[0061] The cold water is discharged into the heating chamber 11 through the water inlet pipe 31, and the cold water is heated to hot water under the action of the heat exchanger 2. Then the first pumping member 51 is started to pump the hot water into the heat preservation chamber 12. The driving member 411 is started to drive the rotating shaft 62 to rotate, and the heater 61 is started synchronously to continuously heat and keep the hot water in the heat preservation chamber 12. When hot water is needed, the hot water in the heat preservation chamber 12 is pumped out through the second pumping member 33 and supplied to the corresponding water device.

[0062] After the geothermal energy well has been working for a period of time, the driving member 411 can be started to control the rotation of the rotating shaft 412, and then the dirt accumulated on the wall of the heating chamber 11 can be scraped off by the scraper 422.

[0063] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A geothermal energy well, characterized in that: include: A well body (1), wherein the well body (1) has a cavity therein, the cavity comprising: a heating cavity (11) and a heat preservation cavity (12) which are connected to each other, the heating cavity (11) and the heat preservation cavity (12) being connected via a pumping mechanism (5), the pumping mechanism (5) comprising a first pumping member (51) arranged on the well body (1), the water inlet end of the first pumping member (51) being connected to the heating cavity (11), and the water outlet end of the first pumping member (51) being connected to the heat preservation cavity (12); a heat exchanger (2), the heat exchanger (2) being arranged in the well body (1), with one end of the heat exchanger being located in the heating chamber (11) and the other end extending out of the well body (1); a pipe assembly, the pipe assembly being arranged on the well body (1), comprising a water inlet pipe (31) and a water outlet pipe (32), one end of the water inlet pipe (31) extending into the heating chamber (11) for supplying cold water into the heating chamber (11), and one end of the water outlet pipe (32) extending into the heat preservation chamber (12) for discharging hot water generated after heating the cold water in the heat preservation chamber (12); A descaling assembly, the descaling assembly comprising: a rotating mechanism (41) and a plurality of scraper mechanisms (42), the rotating mechanism (41) being arranged on the well body (1), the scraper mechanism (42) being located in the heating chamber (11), and the plurality of scraper mechanisms (42) being arranged on the rotating mechanism (41), the rotating mechanism (41) being used to drive the scraper mechanism (42) to rotate so as to scrape off dirt on the wall surface of the cavity; The rotary mechanism (41) comprises: a driving member (411) and a rotating shaft (412); a driving end of the driving member (411) is connected to the rotating shaft (412); and a plurality of scraper mechanisms (42) are arranged on the rotating shaft (412) at intervals in the circumferential direction of the rotating shaft (412).

2. The geothermal energy well according to claim 1, characterized in that: The scraper mechanism (42) comprises: a connecting member (421) and a scraper (422); one end of the connecting member (421) is connected to the rotating shaft (412); the scraper (422) is arranged on the connecting member (421); and a water hole is provided on the scraper (422).

3. The geothermal energy well according to claim 1, characterized in that: The pumping mechanism (5) further comprises: a heat sink (52) and a dustproof net (53); the heat sink (52) is arranged on the first water pumping member (51); and the dustproof net (53) is arranged on the side wall of the well body (1) and corresponds to the position of the heat sink (52).

4. The geothermal energy well according to claim 1, characterized in that: The heat preservation chamber (12) is provided with a heat preservation mechanism, and the heat preservation mechanism comprises a heater (61).

5. The geothermal energy well according to claim 4, characterized in that: The heat preservation mechanism further comprises: a rotating shaft (62) and a mounting plate (63) arranged on the rotating shaft (62), the rotating shaft (62) being connected to the driving end of the driving member (411), the heater (61) being located in the mounting plate (63), and a water passage being arranged on the mounting plate (63).

6. The geothermal energy well according to claim 1, characterized in that: The pipeline assembly further comprises a second water pumping member (33), the second water pumping member (33) being arranged on the well body (1) and having a water inlet connected to the other end of the water outlet pipe (32).

7. The geothermal energy well according to any one of claims 1 to 6, characterized in that: A vacuum chamber (13) is provided on the side wall of the well body (1).

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