A device for preventing cold and heat accumulation in shallow geothermal energy and its operation method

Abstract

The present disclosure provides a device for preventing cold and heat accumulation in shallow geothermal energy and an operation method thereof. The device for preventing cold and heat accumulation in shallow geothermal energy includes: a plurality of devices for dissipating cold and heat accumulation installed in the central area of a shallow geothermal energy pipe group, and a treatment device for treating the soil in the cold and heat accumulation area into silty soil, the treatment device being located beside the device for dissipating cold and heat accumulation; the plurality of devices for dissipating cold and heat accumulation are arranged in an interspersed manner in the central area of the shallow geothermal energy pipe group; each device for dissipating cold and heat accumulation includes: a first channel through which shallow geothermal energy flows, and a second channel through which silty soil flows, the maximum inner diameter of the first channel < 1 / 3 of the minimum inner diameter of the second channel; the first channel is sleeved on the second channel, and the shallow geothermal energy in the first channel exchanges heat with the silty soil in the second channel. The operation method is based on the above device for preventing cold and heat accumulation in shallow geothermal energy. The present disclosure can not only release the soil energy in the cold and heat accumulation area to increase the cooling and heating load, but also does not affect the existing shallow geothermal energy system and the geological environment.

Description

Technical Field

[0001] The present disclosure relates to the field of groundwater extraction, and particularly to a device for preventing cold and heat accumulation in shallow geothermal energy and an operation method thereof. Background Art

[0002] When extracting groundwater from a well, the thermal energy in the groundwater is transferred to a place close to the ground. The geothermal energy in the form of groundwater is natural thermal energy extracted from the earth's crust and exists in the form of heat. The heat is transferred to a place closer to the ground, directly using this natural thermal energy and extracting its energy.

[0003] In the existing shallow geothermal energy systems, obvious cold accumulation and heat accumulation phenomena occur. Specifically, in the northern regions, after several years of operation of the geothermal energy heating system, cold accumulation occurs in the central area of the pipe group, and the heating load of the geothermal energy heating system decreases significantly. After several years of operation of the surface water cooling system, heat accumulation occurs in the central area of the pipe group, and the cooling load of the surface water cooling system decreases significantly.

[0004] In view of this, it is necessary to deal with the cold and heat accumulation in the existing technology to improve the cooling and heating loads. Summary of the Invention

[0005] Embodiments of the present invention provide a device for preventing cold and heat accumulation in shallow geothermal energy and an operation method thereof. The treatment device is used to process the soil in the cold and heat accumulation area in the central area of the shallow geothermal energy pipe group into silty soil, and the dissipation cold and heat accumulation device is used to consume the cold and heat in the silty soil and then return the silty soil to the cold and heat accumulation area. This can not only release the soil energy in the cold and heat accumulation area to improve the cooling and heating loads but also does not affect the existing shallow geothermal energy system and the geological environment.

[0006] To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

[0007] On the one hand, a device for preventing cold and heat accumulation in shallow geothermal energy is provided, including: a plurality of dissipation cold and heat accumulation devices installed in the central area of the shallow geothermal energy pipe group, and a treatment device for processing the soil in the cold and heat accumulation area into silty soil, the treatment device being located beside the dissipation cold and heat accumulation devices;

[0008] The plurality of dissipation cold and heat accumulation devices are arranged in an interspersed manner in the central area of the shallow geothermal energy pipe group;

[0009] Each dissipation cold and heat accumulation device includes: a first channel for shallow geothermal energy to flow through, and a second channel for silty soil to flow through, the maximum inner diameter of the first channel < 1 / 3 of the minimum inner diameter of the second channel;

[0010] The first channel is sleeved on the second channel, and the shallow geothermal energy in the first channel exchanges heat with the silty soil in the second channel;

[0011] If the shallow geothermal energy flowing in the first channel is a cold medium, the temperatures of the soil in the cold and heat accumulation area and the silty soil are both lower than the temperature of the cold medium, and the temperature of the silty soil is higher than that of the soil in the cold and heat accumulation area. The silty soil in the second channel absorbs the heat of the cold medium in the first channel to reduce the temperature of the cold medium.

[0012] If the shallow geothermal energy flowing in the first channel is a hot medium, the temperatures of the soil in the cold and heat accumulation area and the silty soil are both higher than the temperature of the hot medium, and the temperature of the silty soil is lower than that of the soil in the cold and heat accumulation area. The hot medium in the first channel absorbs the heat of the silty soil in the second channel to increase the temperature of the hot medium.

[0013] On the one hand, in a possible implementation manner, the processing device includes a silty soil processing body, a cold and heat accumulation area hole-opening body, a negative pressure system, and a discharge system. The negative pressure system is located between the cold and heat accumulation area hole-opening body and the silty soil processing body, and the discharge system communicates with the silty soil processing body and multiple said cold and heat accumulation dissipation devices.

[0014] The cold and heat accumulation area hole-opening body opens holes in the soil of the cold and heat accumulation area and collects the soil in the holes during the hole-opening process. After the cold and heat accumulation area hole-opening body opens holes in the soil of the cold and heat accumulation area, a number of holes are left, the center lines of the number of holes are arranged in a crossed manner, and the number of holes all avoid the pipeline group in the central area of the shallow geothermal energy pipe group.

[0015] The negative pressure system sucks the soil in the hole to the silty soil processing body in a negative pressure manner. The silty soil processing body processes the soil in the hole into silty soil, and the silty soil in the silty soil processing body is divided into multiple strands through the discharge system and enters different said cold and heat accumulation dissipation devices.

[0016] On the one hand, in a possible implementation manner, the discharge system communicates with the second channel inlets of multiple said cold and heat accumulation dissipation devices.

[0017] The second channel has silty soil processed by the silty soil processing body flowing therein.

[0018] On the one hand, in a possible implementation manner, the central area of the shallow geothermal energy pipe group includes a number of vertical water supply pipes, a number of horizontal water supply pipes, and a number of bypass water supply pipes.

[0019] The first channel of at least one said cold and heat accumulation dissipation device connects the vertical water supply pipe and the horizontal water supply pipe close to the vertical water supply pipe. The cold medium in the vertical water supply pipe exchanges heat with the silty soil in the second channel in the first channel of the cold and heat accumulation dissipation device and then flows into the horizontal water supply pipe. The hot medium in the horizontal water supply pipe exchanges heat with the silty soil in the second channel in the first channel of the cold and heat accumulation dissipation device and then flows into the vertical water supply pipe.

[0020] At least one first channel of the heat and cold accumulation dissipation device connects a vertical water supply pipe and another vertical water supply pipe adjacent to the vertical water supply pipe. The cold medium in one vertical water supply pipe exchanges heat with the silty soil in the second channel in the first channel of the heat and cold accumulation dissipation device and then flows into the other vertical water supply pipe. The hot medium in the other vertical water supply pipe exchanges heat with the silty soil in the second channel in the first channel of the heat and cold accumulation dissipation device and then flows into one vertical water supply pipe;

[0021] At least one first channel of the heat and cold accumulation dissipation device connects a horizontal water supply pipe and another horizontal water supply pipe adjacent to the horizontal water supply pipe. The cold medium in one horizontal water supply pipe exchanges heat with the silty soil in the second channel in the first channel of the heat and cold accumulation dissipation device and then flows into the other horizontal water supply pipe. The hot medium in the other horizontal water supply pipe exchanges heat with the silty soil in the second channel in the first channel of the heat and cold accumulation dissipation device and then flows into one horizontal water supply pipe.

[0022] On the one hand, in a possible implementation manner, the heat and cold accumulation dissipation device includes a primary heat and cold accumulation heat exchange system, a heat and cold medium branch system, a first intermediate heat and cold accumulation heat exchange system, and a second intermediate heat and cold accumulation heat exchange system;

[0023] After the primary heat and cold accumulation heat exchange system intersects with the heat and cold medium branch system, a primary heat exchange system is formed. The primary heat exchange system is respectively connected to the first intermediate heat and cold accumulation heat exchange system and the second intermediate heat and cold accumulation heat exchange system; the first intermediate heat and cold accumulation heat exchange system and the second intermediate heat and cold accumulation heat exchange system are connected to the cold and heat temporary storage system;

[0024] The first channel penetrates through the heat and cold medium branch system, the first intermediate heat and cold accumulation heat exchange system, and the second intermediate heat and cold accumulation heat exchange system. The second channel penetrates through the primary heat and cold accumulation heat exchange system, the first intermediate heat and cold accumulation heat exchange system, and the second intermediate heat and cold accumulation heat exchange system.

[0025] On the one hand, in a possible implementation manner, the intersection of the first intermediate heat and cold accumulation heat exchange system and the second intermediate heat and cold accumulation heat exchange system is an acute angle. The cross-section formed at the intersection of the first intermediate heat and cold accumulation heat exchange system and the second intermediate heat and cold accumulation heat exchange system is a large-slope cone. Conveying heat and cold accumulation material power devices are respectively arranged at the bending sections where the first intermediate heat and cold accumulation heat exchange system and the second intermediate heat and cold accumulation heat exchange system are connected to the cold and heat temporary storage system. A number of conveying heat and cold accumulation material power devices extend into the first intermediate heat and cold accumulation heat exchange system and the second intermediate heat and cold accumulation heat exchange system and extend along the flow direction of the silty soil.

[0026] On the other hand, an operation method for preventing heat and cold accumulation in shallow geothermal energy is provided, including:

[0027] The temperature sensor monitors in real time the soil temperature in the hot and cold accumulation area at the center of the shallow geothermal energy pipe group. The processor determines in real time whether the soil temperature in the hot and cold accumulation area transmitted by the temperature sensor exceeds the threshold. If it does not exceed the threshold, continuous monitoring is carried out. If it exceeds the threshold, first, the processing device of the device for preventing hot and cold accumulation in shallow geothermal energy is started, and then the device for dissipating hot and cold accumulation of the device for preventing hot and cold accumulation in shallow geothermal energy is started.

[0028] The opening body in the hot and cold accumulation area of the processing device has holes formed by opening holes along axes in different directions within a preset radius with the center of the processing device as the center of the circle. The negative pressure system of the processing device sucks the soil in the holes collected by the opening body in the hot and cold accumulation area to the pulverization processing body of the processing device in a negative pressure manner. The pulverization processing body of the processing device processes the soil in the holes into pulverized soil. The pulverized soil in the pulverization processing body of the processing device is divided into multiple strands through the discharge system of the processing device and enters at least one second channel of the device for dissipating hot and cold accumulation.

[0029] The pulverized soil in the second channel exchanges heat with the shallow geothermal energy flowing in the first channel of the device for dissipating hot and cold accumulation. If the shallow geothermal energy flowing in the first channel is a cold medium, the temperature of the soil in the hot and cold accumulation area and the temperature of the pulverized soil are both lower than the temperature of the cold medium, and the temperature of the pulverized soil is higher than the temperature of the soil in the hot and cold accumulation area. The pulverized soil in the second channel absorbs the heat of the cold medium in the first channel. If the shallow geothermal energy flowing in the first channel is a hot medium, the temperature of the soil in the hot and cold accumulation area and the temperature of the pulverized soil are both higher than the temperature of the hot medium, and the temperature of the pulverized soil is lower than the temperature of the soil in the hot and cold accumulation area. The hot medium in the first channel absorbs the heat of the pulverized soil in the second channel.

[0030] The pulverized soil flowing out of the second channel covers several holes until the device for preventing hot and cold accumulation in shallow geothermal energy stops working after the soil temperature in the hot and cold accumulation area does not exceed the threshold.

[0031] On the other hand, in a possible implementation, the shallow geothermal energy flowing in the first channel includes the following working conditions:

[0032] Working condition 1: The first channel of the device for dissipating hot and cold accumulation connects the vertical water supply pipe and the horizontal water supply pipe close to the vertical water supply pipe. The cold medium in the vertical water supply pipe exchanges heat with the pulverized soil in the second channel in the first channel of the device for dissipating hot and cold accumulation and then flows into the horizontal water supply pipe. The hot medium in the horizontal water supply pipe exchanges heat with the pulverized soil in the second channel in the first channel of the device for dissipating hot and cold accumulation and then flows into the vertical water supply pipe.

[0033] Operating condition 2: The first channel of the heat and cold accumulation dissipation device connects a vertical water supply pipe and another vertical water supply pipe close to the vertical water supply pipe. The cold medium in one vertical water supply pipe flows into the other vertical water supply pipe after exchanging heat with the silty soil in the second channel in the first channel of the heat and cold accumulation dissipation device. The hot medium in the other vertical water supply pipe flows into one vertical water supply pipe after exchanging heat with the silty soil in the second channel in the first channel of the heat and cold accumulation dissipation device;

[0034] Operating condition 3: The first channel of the heat and cold accumulation dissipation device connects a horizontal water supply pipe and another horizontal water supply pipe close to the horizontal water supply pipe. The cold medium in one horizontal water supply pipe flows into the other horizontal water supply pipe after exchanging heat with the silty soil in the second channel in the first channel of the heat and cold accumulation dissipation device. The hot medium in the other horizontal water supply pipe flows into one horizontal water supply pipe after exchanging heat with the silty soil in the second channel in the first channel of the heat and cold accumulation dissipation device.

[0035] In this disclosure, there are at least the following technical effects or advantages:

[0036] In the embodiments of the present invention, a processing device is used to process the soil in the heat and cold accumulation area in the center of the shallow geothermal energy pipe group into silty soil. After using the heat and cold accumulation dissipation device to consume the heat and cold in the silty soil, the silty soil is returned to the heat and cold accumulation area, which can not only release the energy of the soil in the heat and cold accumulation area to increase the cooling and heating load but also does not affect the existing shallow geothermal energy system and the geological environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for describing the embodiments of the present invention or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0038] Figure 1 Schematic diagram of a device for preventing heat and cold accumulation in shallow geothermal energy according to some embodiments of the present disclosure;

[0039] Figure 2 Schematic diagram of the central area of a shallow geothermal energy pipe group according to some embodiments of the present disclosure;

[0040] Figure 3 Schematic diagram of the installation of the heat and cold accumulation dissipation device in the central area of a shallow geothermal energy pipe group according to some embodiments of the present disclosure;

[0041] Figure 4 Schematic diagram of the processing device located in the central area of a shallow geothermal energy pipe group according to some embodiments of the present disclosure;

[0042] Figure 5 Illustration of the relative position between the preset radius range and the central area of the shallow geothermal energy pipe group provided according to some embodiments of the present disclosure;

[0043] Figure 6 Schematic diagram of the heat and cold accumulation dissipation device provided according to some embodiments of the present disclosure;

[0044] Figure 7 Schematic diagram of the relative relationship between each system in the heat and cold accumulation dissipation device provided according to some embodiments of the present disclosure;

[0045] Reference numerals: 100 - Central area of the shallow geothermal energy pipe group; 110 - Vertical water supply pipe; 120 - Horizontal water supply pipe; 130 - Bypass water supply pipe; 1 - Heat and cold accumulation dissipation device; 11 - First channel; 12 - Second channel; 101 - Primary heat and cold accumulation heat exchange system; 102 - Heat and cold medium branch system; 103 - First intermediate heat and cold accumulation heat exchange system; 104 - Second intermediate heat and cold accumulation heat exchange system; 105 - Primary heat exchange system; 106 - Temporary heat and cold storage system; 107 - Power equipment for transporting heat and cold accumulation materials; 2 - Processing device; 3 - Preset radius range. Detailed implementation manners

[0046] The present disclosure will be described in detail below with reference to the embodiments shown in the drawings. However, it should be noted that these embodiments are not limitations on the present disclosure, and any equivalent transformation or substitution in terms of function, method, or structure made by those of ordinary skill in the art according to these embodiments shall fall within the protection scope of the present disclosure.

[0047] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5, embodiments of the present disclosure provide a device for preventing cold and heat accumulation in shallow geothermal energy, including: a plurality of cold and heat accumulation dissipation devices 1 installed in the central area 100 of the shallow geothermal energy pipe group, and a treatment device 2 for treating the soil in the cold and heat accumulation area into silty soil. The treatment device 2 is located beside the cold and heat accumulation dissipation devices 1; the plurality of cold and heat accumulation dissipation devices 1 are arranged in an interspersed manner in the central area 100 of the shallow geothermal energy pipe group; each cold and heat accumulation dissipation device 1 includes: a first channel 11 through which shallow geothermal energy flows, and a second channel 12 through which silty soil flows. The maximum inner diameter of the first channel 11 < 1 / 3 of the minimum inner diameter of the second channel 12; the first channel 11 is sleeved in the second channel 12, and the shallow geothermal energy in the first channel 11 exchanges heat with the silty soil in the second channel 12; if the shallow geothermal energy flowing in the first channel 11 is a cold medium, the temperature of the soil in the cold and heat accumulation area and the temperature of the silty soil are both lower than the temperature of the cold medium, and the temperature of the silty soil is higher than the temperature of the soil in the cold and heat accumulation area. The silty soil in the second channel 12 absorbs the heat of the cold medium in the first channel 11 to reduce the temperature of the cold medium; if the shallow geothermal energy flowing in the first channel 11 is a hot medium, the temperature of the soil in the cold and heat accumulation area and the temperature of the silty soil are both higher than the temperature of the hot medium, and the temperature of the silty soil is lower than the temperature of the soil in the cold and heat accumulation area. The hot medium in the first channel 11 absorbs the heat of the silty soil in the second channel 12 to increase the temperature of the hot medium.

[0048] The above-mentioned treatment device 2 includes a silty treatment body, a cold and heat accumulation area hole-opening body, a negative pressure system, and a discharge system. The negative pressure system is located between the cold and heat accumulation area hole-opening body and the silty treatment body, and the discharge system communicates with the silty treatment body and the plurality of cold and heat accumulation dissipation devices 1; the cold and heat accumulation area hole-opening body opens holes in the soil in the cold and heat accumulation area and collects the soil in the holes during the hole-opening process. After the cold and heat accumulation area hole-opening body opens holes in the soil in the cold and heat accumulation area, a number of holes remain, and the center lines of the number of holes are arranged in a crossed manner, and the number of holes all avoid the pipeline group in the central area 100 of the shallow geothermal energy pipe group; the negative pressure system sucks the soil in the holes to the silty treatment body by negative pressure, the silty treatment body processes the soil in the holes into silty soil, and the silty soil in the silty treatment body is divided into multiple strands through the discharge system and enters different cold and heat accumulation dissipation devices 1.

[0049] The above-mentioned discharge system communicates with the inlet of the second channel 12 of the plurality of cold and heat accumulation dissipation devices 1; the silty soil processed by the silty treatment body flows in the second channel 12.

[0050] Please continue to refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5, the central area 100 of the above-mentioned shallow geothermal pipe group includes several vertical water supply pipes 110, several horizontal water supply pipes 120 and several bypass water supply pipes 130; the first channel 11 of at least one heat and cold accumulation dissipation device 1 connects the vertical water supply pipe 110 and the horizontal water supply pipe 120 close to the vertical water supply pipe 110. The cold medium in the vertical water supply pipe 110 exchanges heat with the silty soil in the second channel 12 in the first channel 11 of the heat and cold accumulation dissipation device 1 and then flows into the horizontal water supply pipe 120. The hot medium in the horizontal water supply pipe 120 exchanges heat with the silty soil in the second channel 12 in the first channel 11 of the heat and cold accumulation dissipation device 1 and then flows into the vertical water supply pipe 110; the first channel 11 of at least one heat and cold accumulation dissipation device 1 connects one vertical water supply pipe 110 and another vertical water supply pipe 110 close to the vertical water supply pipe 110. The cold medium in one vertical water supply pipe 110 exchanges heat with the silty soil in the second channel 12 in the first channel 11 of the heat and cold accumulation dissipation device 1 and then flows into another vertical water supply pipe 110. The hot medium in another vertical water supply pipe 110 exchanges heat with the silty soil in the second channel 12 in the first channel 11 of the heat and cold accumulation dissipation device 1 and then flows into one vertical water supply pipe 110; the first channel 11 of at least one heat and cold accumulation dissipation device 1 connects one horizontal water supply pipe 120 and another horizontal water supply pipe 120 close to the horizontal water supply pipe 120. The cold medium in one horizontal water supply pipe 120 exchanges heat with the silty soil in the second channel 12 in the first channel 11 of the heat and cold accumulation dissipation device 1 and then flows into another horizontal water supply pipe 120. The hot medium in another horizontal water supply pipe 120 exchanges heat with the silty soil in the second channel 12 in the first channel 11 of the heat and cold accumulation dissipation device 1 and then flows into one horizontal water supply pipe 120.

[0051] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7, the above-mentioned dissipation of cold and heat accumulation device 1 includes a primary cold and heat accumulation heat exchange system 101, a cold and heat medium branch system 102, a first intermediate cold and heat accumulation heat exchange system 103, and a second intermediate cold and heat accumulation heat exchange system 104; after the primary cold and heat accumulation heat exchange system 101 intersects with the cold and heat medium branch system 102, a primary heat exchange system 105 is formed, and the primary heat exchange system 105 is respectively connected to the first intermediate cold and heat accumulation heat exchange system 103 and the second intermediate cold and heat accumulation heat exchange system 104; the first intermediate cold and heat accumulation heat exchange system 103 and the second intermediate cold and heat accumulation heat exchange system 104 are connected to the cold and heat temporary storage system 106; the first channel 11 runs through the cold and heat medium branch system 102, the first intermediate cold and heat accumulation heat exchange system 103, and the second intermediate cold and heat accumulation heat exchange system 104, and the second channel 12 runs through the primary cold and heat accumulation heat exchange system 101, the first intermediate cold and heat accumulation heat exchange system 103, and the second intermediate cold and heat accumulation heat exchange system 104.

[0052] It should be noted that the above-mentioned cold and heat medium branch system 102 is also connected to the cold and heat temporary storage system 106, and a geothermal energy branch machine is provided on the cold and heat medium branch system 102; a discharge system is also provided on the cold and heat medium branch system 102. The geothermal energy branch machine can circulate the airflow in the cold and heat temporary storage system 106 with the airflow in the first intermediate cold and heat accumulation heat exchange system 103 and the airflow in the second intermediate cold and heat accumulation heat exchange system 104. The combined use and control of the geothermal energy branch machine, the first intermediate cold and heat accumulation heat exchange system 103, and the second intermediate cold and heat accumulation heat exchange system 104 can form a single silty soil channel or multiple silty soil channels, change the air pressure in the cold and heat temporary storage system 106, and is more conducive to the heat exchange between silty soil and shallow geothermal energy. Preferably, the primary cold and heat accumulation heat exchange system 101, the cold and heat medium branch system 102, the first intermediate cold and heat accumulation heat exchange system 103, and the second intermediate cold and heat accumulation heat exchange system 104 are arranged staggeredly in space. The staggered arrangement can save space and facilitate the layout of the flow direction of silty soil.

[0053] Please continue to refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7, the intersection of the above-mentioned first intermediate cold and heat accumulation heat exchange system 103 and the second intermediate cold and heat accumulation heat exchange system 104 is an acute angle. The cross-section formed at the intersection of the first intermediate cold and heat accumulation heat exchange system 103 and the second intermediate cold and heat accumulation heat exchange system 104 is a large-slope cone. The bending sections where the first intermediate cold and heat accumulation heat exchange system 103 and the second intermediate cold and heat accumulation heat exchange system 104 are connected to the cold and heat temporary storage system 106 are respectively provided with power equipment 107 for transporting cold and heat accumulated materials. A number of power equipment 107 for transporting cold and heat accumulated materials extend into the first intermediate cold and heat accumulation heat exchange system 103 and the second intermediate cold and heat accumulation heat exchange system 104 and extend along the flow direction of the silty soil.

[0054] The embodiment of the present disclosure also provides an operation method of a device for preventing cold and heat accumulation in shallow geothermal energy, including:

[0055] The temperature sensor monitors the soil temperature in the cold and heat accumulation area of the center area 100 of the shallow geothermal energy pipe group in real time. The processor judges in real time whether the soil temperature in the cold and heat accumulation area transmitted by the temperature sensor exceeds the threshold. If it does not exceed the threshold, continuous monitoring is carried out. If it exceeds the threshold, the processing device 2 of the device for preventing cold and heat accumulation in shallow geothermal energy is started first, and then the heat dissipation cold and heat accumulation device 1 of the device for preventing cold and heat accumulation in shallow geothermal energy is started;

[0056] The opening body in the cold and heat accumulation area of the processing device 2 forms a number of holes by opening holes along different axis directions within a preset radius range 3 with the center of the processing device 2 as the center. The negative pressure system of the processing device 2 sucks the soil in the holes collected by the opening body in the cold and heat accumulation area to the silty soil treatment body of the processing device 2 in a negative pressure manner. The silty soil treatment body of the processing device 2 processes the soil in the holes into silty soil. The silty soil in the silty soil treatment body of the processing device 2 is divided into multiple strands through the discharge system of the processing device 2 and enters the second channel 12 of at least one heat dissipation cold and heat accumulation device 1;

[0057] The silty soil in the second channel 12 exchanges heat with the shallow geothermal energy flowing in the first channel 11 of the heat dissipation cold and heat accumulation device 1. If the shallow geothermal energy flowing in the first channel 11 is a cold medium, the temperatures of the soil in the cold and heat accumulation area and the silty soil are both lower than the temperature of the cold medium, and the temperature of the silty soil is higher than the temperature of the soil in the cold and heat accumulation area. The silty soil in the second channel 12 absorbs the heat of the cold medium in the first channel 11; if the shallow geothermal energy flowing in the first channel 11 is a hot medium, the temperatures of the soil in the cold and heat accumulation area and the silty soil are both higher than the temperature of the hot medium, and the temperature of the silty soil is lower than the temperature of the soil in the cold and heat accumulation area. The hot medium in the first channel 11 absorbs the heat of the silty soil in the second channel 12;

[0058] The silty soil flowing out of the second channel 12 covers a number of holes until the device for preventing cold and heat accumulation in shallow geothermal energy stops working after the soil temperature in the cold and heat accumulation area does not exceed the threshold.

[0059] In the above solution, it is preferred that the shallow geothermal energy flowing through the first channel 11 includes the following operating conditions:

[0060] Operating condition 1: The first channel 11 of the heat and cold accumulation dissipation device 1 connects the vertical water supply pipe 110 and the horizontal water supply pipe 120 close to the vertical water supply pipe 110. The cold medium in the vertical water supply pipe 110 exchanges heat with the silty soil in the second channel 12 in the first channel 11 of the heat and cold accumulation dissipation device 1 and then flows into the horizontal water supply pipe 120. The hot medium in the horizontal water supply pipe 120 exchanges heat with the silty soil in the second channel 12 in the first channel 11 of the heat and cold accumulation dissipation device 1 and then flows into the vertical water supply pipe 110;

[0061] Operating condition 2: The first channel 11 of the heat and cold accumulation dissipation device 1 connects one vertical water supply pipe 110 and another vertical water supply pipe 110 close to the vertical water supply pipe 110. The cold medium in one vertical water supply pipe 110 exchanges heat with the silty soil in the second channel 12 in the first channel 11 of the heat and cold accumulation dissipation device 1 and then flows into the other vertical water supply pipe 110. The hot medium in the other vertical water supply pipe 110 exchanges heat with the silty soil in the second channel 12 in the first channel 11 of the heat and cold accumulation dissipation device 1 and then flows into one vertical water supply pipe 110;

[0062] Operating condition 3: The first channel 11 of the heat and cold accumulation dissipation device 1 connects one horizontal water supply pipe 120 and another horizontal water supply pipe 120 close to the horizontal water supply pipe 120. The cold medium in one horizontal water supply pipe 120 exchanges heat with the silty soil in the second channel 12 in the first channel 11 of the heat and cold accumulation dissipation device 1 and then flows into the other horizontal water supply pipe 120. The hot medium in the other horizontal water supply pipe 120 exchanges heat with the silty soil in the second channel 12 in the first channel 11 of the heat and cold accumulation dissipation device 1 and then flows into one horizontal water supply pipe 120.

[0063] In the embodiment of the present disclosure, the processing device 2 is used to process the soil in the heat and cold accumulation area of the center area 100 of the shallow geothermal energy pipe group into silty soil, and the heat and cold accumulation dissipation device 1 is used to consume the cold and heat in the silty soil and then return the silty soil to the heat and cold accumulation area, which can not only release the soil energy in the heat and cold accumulation area to increase the cooling and heating load but also does not affect the existing shallow geothermal energy system and the geological environment.

[0064] The series of detailed descriptions listed above are only specific descriptions of the feasible implementation manners of the present disclosure, and they are not intended to limit the protection scope of the present disclosure. Any equivalent implementation manners or changes made without departing from the technical spirit of the present disclosure should be included in the protection scope of the present disclosure.

[0065] For those skilled in the art, it is obvious that the present disclosure is not limited to the details of the above-mentioned exemplary embodiments, and the present disclosure can be implemented in other specific forms without departing from the spirit or basic characteristics of the present disclosure. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present disclosure is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present disclosure. Any reference signs in the claims should not be construed as limiting the claims involved.

[0066] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for preventing cold and heat accumulation in shallow geothermal energy, characterized in that, Including: A plurality of devices for dissipating cold and heat accumulation installed in the central area of the shallow geothermal energy pipe group, and a treatment device for treating the soil in the cold and heat accumulation area into silty soil, the treatment device being located beside the device for dissipating cold and heat accumulation; The plurality of devices for dissipating cold and heat accumulation are arranged in an interspersed manner in the central area of the shallow geothermal energy pipe group; Each device for dissipating cold and heat accumulation includes: a first channel through which shallow geothermal energy flows, and a second channel through which silty soil flows, the maximum inner diameter of the first channel < 1 / 3 of the minimum inner diameter of the second channel; The first channel is sleeved inside the second channel, and the shallow geothermal energy in the first channel exchanges heat with the silty soil in the second channel; If the shallow geothermal energy flowing in the first channel is a cold medium, the temperature of the soil in the cold and heat accumulation area and the temperature of the silty soil are both lower than the temperature of the cold medium, and the temperature of the silty soil is higher than the temperature of the soil in the cold and heat accumulation area. The silty soil in the second channel absorbs the heat of the cold medium in the first channel to reduce the temperature of the cold medium; If the shallow geothermal energy flowing in the first channel is a hot medium, the temperature of the soil in the cold and heat accumulation area and the temperature of the silty soil are both higher than the temperature of the hot medium, and the temperature of the silty soil is lower than the temperature of the soil in the cold and heat accumulation area. The hot medium in the first channel absorbs the heat of the silty soil in the second channel to increase the temperature of the hot medium; The treatment device includes a silty treatment body, an opening body in the cold and heat accumulation area, a negative pressure system, and a discharge system. The negative pressure system is located between the opening body in the cold and heat accumulation area and the silty treatment body, and the discharge system communicates the silty treatment body with the plurality of devices for dissipating cold and heat accumulation; The opening body in the cold and heat accumulation area makes holes in the soil in the cold and heat accumulation area and collects the soil in the holes during the hole-making process. After the opening body in the cold and heat accumulation area makes holes in the soil in the cold and heat accumulation area, a number of holes remain, the center lines of the number of holes are arranged in a cross manner, and the number of holes all avoid the pipeline group in the central area of the shallow geothermal energy pipe group; The negative pressure system sucks the soil in the holes to the silty treatment body in a negative pressure manner, the silty treatment body treats the soil in the holes into silty soil, and the silty soil in the silty treatment body is divided into multiple strands through the discharge system and enters different devices for dissipating cold and heat accumulation; the discharge system communicates with the second channel inlets of the plurality of devices for dissipating cold and heat accumulation.

2. The device for preventing cold and heat accumulation in shallow geothermal energy according to claim 1, characterized in that, The central area of the shallow geothermal energy pipe group includes a number of vertical water supply pipes, a number of horizontal water supply pipes, and a number of bypass water supply pipes; The first channel of at least one device for dissipating cold and heat accumulation connects the vertical water supply pipe and the horizontal water supply pipe close to the vertical water supply pipe. The cold medium in the vertical water supply pipe exchanges heat with the silty soil in the second channel in the device for dissipating cold and heat accumulation and then flows into the horizontal water supply pipe. The hot medium in the horizontal water supply pipe exchanges heat with the silty soil in the second channel in the device for dissipating cold and heat accumulation and then flows into the vertical water supply pipe; At least one first channel of the heat and cold accumulation dissipation device connects a vertical water supply pipe and another vertical water supply pipe adjacent to the vertical water supply pipe. The cold medium in one vertical water supply pipe exchanges heat with the silty soil in the second channel in the first channel of the heat and cold accumulation dissipation device and then flows into the other vertical water supply pipe. The hot medium in the other vertical water supply pipe exchanges heat with the silty soil in the second channel in the first channel of the heat and cold accumulation dissipation device and then flows into one vertical water supply pipe; At least one first channel of the heat and cold accumulation dissipation device connects a horizontal water supply pipe and another horizontal water supply pipe adjacent to the horizontal water supply pipe. The cold medium in one horizontal water supply pipe exchanges heat with the silty soil in the second channel in the first channel of the heat and cold accumulation dissipation device and then flows into the other horizontal water supply pipe. The hot medium in the other horizontal water supply pipe exchanges heat with the silty soil in the second channel in the first channel of the heat and cold accumulation dissipation device and then flows into one horizontal water supply pipe.

3. The device for preventing cold and heat accumulation in shallow geothermal energy according to claim 1, wherein The heat and cold accumulation dissipation device includes a primary heat and cold accumulation heat exchange system, a heat and cold medium branch system, a first intermediate heat and cold accumulation heat exchange system, and a second intermediate heat and cold accumulation heat exchange system; The primary heat and cold accumulation heat exchange system and the heat and cold medium branch system converge to form a primary heat exchange system. The primary heat exchange system is respectively connected to the first intermediate heat and cold accumulation heat exchange system and the second intermediate heat and cold accumulation heat exchange system; the first intermediate heat and cold accumulation heat exchange system and the second intermediate heat and cold accumulation heat exchange system are connected to the cold and heat temporary storage system; The first channel penetrates through the heat and cold medium branch system, the first intermediate heat and cold accumulation heat exchange system, and the second intermediate heat and cold accumulation heat exchange system. The second channel penetrates through the primary heat and cold accumulation heat exchange system, the first intermediate heat and cold accumulation heat exchange system, and the second intermediate heat and cold accumulation heat exchange system.

4. An operating method of the device for preventing cold and heat accumulation in shallow geothermal energy according to claim 2, characterized in that, Including: The temperature sensor monitors the soil temperature in the heat and cold accumulation area at the center of the shallow geothermal energy pipe group in real time. The processor judges in real time whether the soil temperature in the heat and cold accumulation area transmitted by the temperature sensor exceeds the threshold. If it does not exceed the threshold, continuous monitoring is carried out. If it exceeds the threshold, the processing device of the shallow geothermal energy heat and cold accumulation prevention device is started first, and then the heat and cold accumulation dissipation device of the shallow geothermal energy heat and cold accumulation prevention device is started; The heat and cold accumulation area opening body of the processing device forms a number of holes by opening holes along axes in different directions within a preset radius with the center of the processing device as the center of the circle. The negative pressure system of the processing device sucks the soil in the holes collected by the heat and cold accumulation area opening body to the silty soil treatment body of the processing device in a negative pressure manner. The silty soil treatment body of the processing device processes the soil in the holes into silty soil. The silty soil in the silty soil treatment body of the processing device is divided into multiple strands through the discharge system of the processing device and enters the second channel of at least one heat and cold accumulation dissipation device; The silty soil in the second channel exchanges heat with the shallow geothermal energy flowing in the first channel of the heat dissipation and cold-heat accumulation device. If the shallow geothermal energy flowing in the first channel is a cold medium, the temperatures of the soil in the cold-heat accumulation area and the silty soil are both lower than the temperature of the cold medium, and the temperature of the silty soil is higher than the temperature of the soil in the cold-heat accumulation area. The silty soil in the second channel absorbs the heat of the cold medium in the first channel. If the shallow geothermal energy flowing in the first channel is a hot medium, the temperatures of the soil in the cold-heat accumulation area and the silty soil are both higher than the temperature of the hot medium, and the temperature of the silty soil is lower than the temperature of the soil in the cold-heat accumulation area. The hot medium in the first channel absorbs the heat of the silty soil in the second channel. The silty soil flowing out of the second channel covers several holes until the shallow geothermal energy in the cold-heat accumulation area stops working after the soil temperature does not exceed the threshold.

5. The operating method of the device for preventing cold and heat accumulation in shallow geothermal energy according to claim 4, characterized in that, The shallow geothermal energy flowing in the first channel includes the following working conditions: Working condition 1: The first channel of the heat dissipation and cold-heat accumulation device connects the vertical water supply pipe and the horizontal water supply pipe close to the vertical water supply pipe. The cold medium in the vertical water supply pipe exchanges heat with the silty soil in the second channel in the first channel of the heat dissipation and cold-heat accumulation device and then flows into the horizontal water supply pipe. The hot medium in the horizontal water supply pipe exchanges heat with the silty soil in the second channel in the first channel of the heat dissipation and cold-heat accumulation device and then flows into the vertical water supply pipe. Working condition 2: The first channel of the heat dissipation and cold-heat accumulation device connects one vertical water supply pipe and another vertical water supply pipe close to the vertical water supply pipe. The cold medium in one vertical water supply pipe exchanges heat with the silty soil in the second channel in the first channel of the heat dissipation and cold-heat accumulation device and then flows into the other vertical water supply pipe. The hot medium in the other vertical water supply pipe exchanges heat with the silty soil in the second channel in the first channel of the heat dissipation and cold-heat accumulation device and then flows into one vertical water supply pipe. Working condition 3: The first channel of the heat dissipation and cold-heat accumulation device connects one horizontal water supply pipe and another horizontal water supply pipe close to the horizontal water supply pipe. The cold medium in one horizontal water supply pipe exchanges heat with the silty soil in the second channel in the first channel of the heat dissipation and cold-heat accumulation device and then flows into the other horizontal water supply pipe. The hot medium in the other horizontal water supply pipe exchanges heat with the silty soil in the second channel in the first channel of the heat dissipation and cold-heat accumulation device and then flows into one horizontal water supply pipe.

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