Geothermal well without taking water during heat exchange

Abstract

The utility model relates to the technical field of geothermal wells, in particular to a heat exchange non-water-taking type geothermal well, which fully utilizes domestic wastewater of residents, filters the wastewater and then injects the wastewater into soil around the geothermal well, improves the moisture content of the soil layer around the geothermal well, plays a role in maintaining the geothermal well, and is very suitable for desert arid areas. The geothermal well is improved, the waste water collecting device can be cleaned without disassembling the filter screen, and the use experience of a user is improved. Comprising geothermal wells; the system further comprises a U-shaped pipe, a maintenance pipe, a domestic wastewater collection device and a flushing mechanism, the U-shaped pipe is installed in the geothermal well and facilitates heat exchange, the maintenance pipe is installed on the ground around the U-shaped pipe and injects wastewater filtered by the domestic wastewater collection device into soil, and the domestic wastewater collection device is installed on the ground and communicates with the interior of the maintenance pipe. The flushing mechanism is installed on the domestic wastewater collecting device and flushes the domestic wastewater collecting device.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of geothermal well, in particular to a heat exchange does not take water formula geothermal well. BACKGROUND

[0002] Shallow geothermal source heat utilization refers to the technology of using geothermal resources in a certain depth range below the ground for heating, refrigeration or hot water heating, which uses a ground source heat pump system to convert underground heat energy into a suitable temperature for life through the heat transfer liquid circulation in the underground heat exchanger, thereby realizing the heating and refrigeration of buildings and the production of hot water.

[0003] The existing heat exchange does not take water formula geothermal well, for example, the heat exchange mechanism for taking heat without water in the deep geothermal well disclosed in the utility model patent with application number 202020554087.8, mainly includes a geothermal well body drilled below the ground, a heat exchange pipeline for exchanging geothermal water is arranged inside the geothermal well body, the heat exchange pipeline includes a water supply pipe and a return pipe, the return pipe is sleeved inside the water supply pipe, the geothermal well body includes a well chamber, an inner well and a bottom well from top to bottom along the vertical direction; in use, the geothermal water is filtered by the bottom well pipe and enters the inside of the geothermal well body, when the heat exchange mechanism for taking heat without water in the deep geothermal well is started, the low-temperature medium for heat exchange enters the water supply pipe, and then flows from the top to the bottom of the water supply pipe, and the medium exchanges heat with the geothermal water inside the geothermal well body below the water supply pipe, so that the temperature of the medium is raised, and after the temperature of the medium is raised, the medium enters the inside of the return pipe and flows back from the bottom to the top of the return pipe, and finally the heat is taken by the heat exchanger.

[0004] However, the existing heat exchange does not take water formula geothermal well technology has certain regional limitations, the heat exchange power of the geothermal well has strong relevance with the soil type and the soil moisture content, for the low-moisture soil area, how to improve and maintain it has become an urgent problem in the industry. UTILITY MODEL CONTENTS

[0005] To solve the above technical problems, the utility model provides a heat exchange does not take water formula geothermal well which fully utilizes the domestic wastewater, filters the wastewater and injects it into the soil around the geothermal well, improves the moisture content of the soil layer around the geothermal well, plays a maintenance role on the geothermal well, is very suitable for desert and arid areas, plays a role in improving the geothermal well, and the wastewater collecting device can be cleaned without disassembling the filter screen, improving the user's experience.

[0006] The utility model discloses a kind of heat exchange does not take water formula geothermal well, including geothermal well;Still include U-shaped pipe, maintenance pipe, domestic wastewater collection device and flushing mechanism, U-shaped pipe is installed in geothermal well and is convenient to heat exchange, maintenance pipe is installed on the ground around U-shaped pipe and injects the wastewater filtered after domestic wastewater collection device into soil, domestic wastewater collection device is installed on the ground and with maintenance pipe inside communication, flushing mechanism is installed on domestic wastewater collection device and flushes domestic wastewater collection device;Domestic wastewater is poured into domestic wastewater collection device and is filtered, and the wastewater after filtering is injected into the soil around U-shaped pipe by maintenance pipe, improve soil moisture content, to improve the heat exchange efficiency of U-shaped pipe, after long time use, domestic wastewater collection device can be flushed using flushing mechanism, guarantee domestic wastewater collection device filtering efficiency, U-shaped pipe and the heat in geothermal well are heat exchanged, and it is convenient for resident to utilize geothermal.

[0007] Preferably, the maintenance pipe includes a pipe body, a plurality of water permeation holes and a plurality of sand prevention nets, the pipe body is buried in the soil around the U-shaped pipe and is in communication with the inside of the domestic wastewater collection device, the vertical section of the pipe body is provided with the plurality of water permeation holes, and the sand prevention net is installed on the water permeation hole; the wastewater filtered by the domestic wastewater collection device is transported into the pipe body, and the domestic wastewater is released into the soil layer around the geothermal well through the water permeation hole, so as to improve the moisture content of the soil layer and further improve the heat conduction coefficient of the surrounding soil layer, thereby improving the heat exchange efficiency of the geothermal well, and the sand prevention net is arranged to prevent the soil and sand from entering the pipe body.

[0008] Preferably, the bottom end of the pipe body is located below the local temperature inversion layer, and the maximum depth is controlled to be above the underground water level; being buried above the underground water level can ensure that no potential effect is generated on the underground water body.

[0009] Preferably, the sand prevention net is made of a high molecular material net; the high molecular material net has good corrosion resistance, avoids corrosion of the wastewater, prolongs the service life of the device, and prevents sand and stones from being poured into the pipe body.

[0010] Preferably, the domestic wastewater collection device includes a collection cylinder, a cover, a sundry filter net, a blow-off pipe and a blow-off valve, the bottom end of the collection cylinder is connected with the ground, the inside of the collection cylinder is provided with a cavity, the cavity bottom end is in communication with the inside of the top end of the pipe body, the cover is installed on the collection cylinder, the sundry filter net is installed in the cavity of the cover, the inside of the sundry filter net is provided with an inner cavity, the blow-off pipe is installed on the collection cylinder and is in communication with the inside of the inner cavity of the sundry filter net, and the blow-off valve is installed on the blow-off pipe; the resident opens the cover, pours the wastewater into the inner cavity of the sundry filter net, the sundry filter net filters the domestic wastewater, the wastewater enters the cavity of the collection cylinder through the sundry filter net and is transported into the pipe body, the impurities in the wastewater remain in the inner cavity of the sundry filter net, and the blow-off valve is opened, and the impurities are discharged through the blow-off pipe.

[0011] Preferably, the flushing mechanism comprises a tap and a water pipe, the water pipe is installed on the collecting cylinder and communicates with the inside of the cavity of the collecting cylinder, and the tap is installed on the water pipe; the water pipe is communicated with a water source, and after long time use, the tap is opened, and the tap water enters the collecting cylinder through the water pipe to flush the garbage filter screen, so that the filtering efficiency of the garbage filter screen is ensured.

[0012] Compared with the prior art, the beneficial effects of the utility model are that: domestic wastewater is poured into the domestic wastewater collecting device for filtration, the filtered wastewater is injected into the soil around the U-shaped pipe through the maintenance pipe, the water content of the soil is improved, the heat exchange efficiency of the U-shaped pipe is improved, the domestic wastewater collecting device can be flushed by the flushing mechanism after long time use, the filtering efficiency of the domestic wastewater collecting device is ensured, the heat in the U-shaped pipe and the geothermal well is exchanged, and residents can conveniently utilize the geothermal energy. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 is a structural schematic view of the utility model;

[0014] Fig. 2 is a front view structural schematic view of the maintenance pipe of the utility model;

[0015] Fig. 3 is a cross-sectional structural schematic view of the maintenance pipe of the utility model;

[0016] Fig. 4 is an enlarged structural schematic view of the domestic wastewater collecting device and the flushing mechanism of the utility model.

[0017] Markings in the drawings: 01, geothermal well; 02, U-shaped pipe; 03, maintenance pipe; 31, pipe body; 32, water permeation hole; 33, sand prevention net; 04, domestic wastewater collecting device; 41, collecting cylinder; 42, cover; 43, garbage filter screen; 44, sewage pipe; 45, sewage valve; 05, flushing mechanism; 51, water pipe; 52, tap. DETAILED DESCRIPTION

[0018] In order to facilitate understanding of the utility model, the utility model will be more fully described below with reference to the related drawings. The utility model can be realized in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0019] Example 1

[0020] The utility model discloses a kind of heat exchange does not take water formula geothermal well, including geothermal well 01;Still include U-shaped tube 02, maintenance pipe 03, domestic wastewater collection device 04 and flushing mechanism 05, U-shaped tube 02 is installed in geothermal well 01 and is convenient for heat exchange, maintenance pipe 03 is installed on the ground around U-shaped tube 02 and injects the wastewater after domestic wastewater collection device 04 filtration into soil, domestic wastewater collection device 04 is installed on the ground and is communicated with maintenance pipe 03 inside, flushing mechanism 05 is installed on domestic wastewater collection device 04 and flushes domestic wastewater collection device 04;Maintenance pipe 03 includes pipe body 31, multiple groups of water seepage hole 32 and multiple groups of sand prevention net 33, pipe body 31 is buried in the soil around U-shaped tube 02 and is communicated with domestic wastewater collection device 04 inside, the vertical section of pipe body 31 is provided with multiple groups of water seepage hole 32, and sand prevention net 33 is installed on water seepage hole 32;Still include the bottom end of pipe body 31 is located below local temperature variation layer, maximum depth control is above groundwater level;Still include that sand prevention net 33 uses high molecular material net;Domestic wastewater collection device 04 includes collection cylinder 41, lid 42, sundry filter screen 43, blow-off pipe 44 and blow-off valve 45, the bottom end of collection cylinder 41 is connected with ground, the inside of collection cylinder 41 is provided with cavity and cavity bottom end is communicated with the top end inside of pipe body 31, lid 42 is installed on collection cylinder 41, and sundry filter screen 43 is installed in the cavity of lid 42, and the inside of sundry filter screen 43 is provided with inner chamber, and blow-off pipe 44 is installed on collection cylinder 41 and is communicated with the inner chamber inside of sundry filter screen 43, and blow-off valve 45 is installed on blow-off pipe 44;When it works, first, residents open lid 42, pour wastewater into the inner chamber of sundry filter screen 43, and sundry filter screen 43 filters domestic wastewater, and wastewater is transported into the cavity of collection cylinder 41 and into pipe body 31 by passing through sundry filter screen 43, and impurities in wastewater remain in the inner chamber of sundry filter screen 43, open blow-off valve 45, and impurities are discharged by blow-off pipe 44, and filtered wastewater is transported into pipe body 31, and domestic wastewater is released into the soil layer around geothermal well 01 by water seepage hole 32, thereby improving the moisture content of soil layer, and further improving the heat conduction coefficient of surrounding soil layer, so as to improve the heat exchange efficiency of geothermal well 01, sand prevention net 33 is arranged to avoid soil and sand into pipe body 31, the bottom end of maintenance pipe 03 is buried above groundwater level to ensure that no potential effect is generated to underground water body, heat exchange is carried out between U-shaped tube 02 and the heat in geothermal well 01, and it is convenient for residents to utilize geothermal.

[0021] Example 2

[0022] As Figs. 1 to 4As shown, the heat exchange non-water type geothermal well of the utility model, on the basis of embodiment 1, flushing mechanism 05 includes tap water pipe 51 and valve 52, tap water pipe 51 is installed on collection cylinder 41 and is communicated with the cavity inside collection cylinder 41, valve 52 is installed on tap water pipe 51, when it works, first, the resident opens lid 42, pours waste water into the inner chamber of sundry filter screen 43, sundry filter screen 43 filters domestic waste water, waste water passes through sundry filter screen 43 and is transported into the cavity of collection cylinder 41 and into pipe body 31, the impurities in waste water remain in the inner chamber of sundry filter screen 43, open blowdown valve 45, the impurities are discharged through blowdown pipe 44, the filtered waste water is transported into pipe body 31, and domestic waste water is released into the soil layer around geothermal well 01 through water seepage hole 32, thereby improving the water content of the soil layer, and further improving the heat transfer coefficient of the surrounding soil layer, so as to improve the heat exchange efficiency of geothermal well 01, sand prevention net 33 is arranged to prevent soil and sand from entering pipe body 31, and maintenance pipe 03 is buried above the underground water level, so that the potential effect on underground water body can be ensured, U-shaped pipe 02 and the heat in geothermal well 01 are heat exchanged, the resident is convenient to utilize geothermal, tap water pipe 51 is communicated with the water source, after long-time use, the staff opens valve 52, tap water enters collection cylinder 41 through tap water pipe 51 to flush sundry filter screen 43, and the filtering efficiency of sundry filter screen 43 is ensured.

[0023] The above only is the preferred implementation of the utility model, it should be pointed out, for ordinary skilled person in the art, without departing from the technical principle of the utility model, under the premise of still can make a number of improvements and variations, these improvements and variations also should be considered as the protection range of the utility model.

Claims

1. A heat exchange non-water extraction geothermal well, comprising a geothermal well (01); characterized in that, The U-shaped pipe (02) is installed in the geothermal well (01) and facilitates heat exchange, the maintenance pipe (03) is installed on the ground around the U-shaped pipe (02) and injects the filtered wastewater of the domestic wastewater collecting device (04) into the soil, the domestic wastewater collecting device (04) is installed on the ground and communicates with the inside of the maintenance pipe (03), and the flushing mechanism (05) is installed on the domestic wastewater collecting device (04) and flushes the domestic wastewater collecting device (04).

2. The heat-exchange non-water production geothermal well of claim 1, wherein, The maintenance pipe (03) comprises a pipe body (31), a plurality of groups of water permeation holes (32) and a plurality of groups of sand prevention nets (33), the pipe body (31) is buried in the soil around the U-shaped pipe (02) and communicates with the inside of the domestic wastewater collecting device (04), and the vertical section of the pipe body (31) is provided with a plurality of groups of water permeation holes (32), and the water permeation hole (32) is provided with a sand prevention net (33).

3. A heat-exchange non-water production geothermal well as claimed in claim 2, characterized in that, The bottom end of the pipe body (31) is located below the local thermocline, and the maximum depth is controlled to be above the groundwater level.

4. The heat-exchange non-water production geothermal well of claim 2, wherein, The sand prevention net (33) is made of a high polymer material net.

5. A heat-exchange non-water production geothermal well as claimed in claim 2, wherein, The domestic wastewater collecting device (04) comprises a collecting cylinder (41), a cover (42), a sundry filtering net (43), a sewage pipe (44) and a sewage valve (45), the bottom end of the collecting cylinder (41) is connected with the ground, the inside of the collecting cylinder (41) is provided with a cavity and the bottom end of the cavity communicates with the inside of the top end of the pipe body (31), the cover (42) is installed on the collecting cylinder (41), the sundry filtering net (43) is installed in the cavity of the cover (42), the inside of the sundry filtering net (43) is provided with an inner cavity, the sewage pipe (44) is installed on the collecting cylinder (41) and communicates with the inside of the inner cavity of the sundry filtering net (43), and the sewage valve (45) is installed on the sewage pipe (44).

6. A heat-exchange non-water production geothermal well as claimed in claim 5, characterized in that, The flushing mechanism (05) comprises a tap water pipe (51) and a valve (52), the tap water pipe (51) is installed on the collecting cylinder (41) and communicates with the inside of the cavity of the collecting cylinder (41), and the valve (52) is installed on the tap water pipe (51).

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