A bag filter device for filtering geothermal tail water without pressure reinjection well

Abstract

The invention relates to the technical field of bag filter equipment for reinjection wells, and discloses a bag filter device for filtering geothermal tail water without pressure reinjection wells, comprising a reinjection filter assembly, a backwash assembly fixedly connected to the left side of the reinjection filter assembly, a cooling assembly fixedly connected to the right side of the reinjection filter assembly, the reinjection filter assembly comprising a reinjection well, a fixed plate fixedly sleeved on the upper part of the reinjection well, the reinjection well being located above the fixed plate and leaking out of the ground, the reinjection well being located below the fixed plate and buried underground, an inner well being fixedly sleeved on the inner wall of the bottom side of the reinjection well, a contact switch fixedly installed on the upper end of the inner well being, uniformly distributed slide rails provided on the upper inner wall of the reinjection well, a movable disk movably sleeved on the interior of the reinjection well by means of the slide rails, the device has the function of effectively removing impurity particles accumulated on the bag filter screen, and the device has the function of pre-cooling geothermal tail water.

Description

Technical Field

[0001] The invention relates to the technical field of bag filter equipment for reinjection wells, and more specifically to a bag filter device for filtering geothermal tail water pressure-free reinjection wells. Background Art

[0002] With the continuous development of geothermal development and utilization, the number of geothermal wells and the amount of water pumped are increasing year by year. In order to avoid the continuous decline of water levels and the reduction of the service life of wells, reinjection wells have become one of the important measures for the sustainable development of geothermal energy. Only pumping without injection will cause geothermal water containing certain harmful components to be discharged into the surface water or infiltrate into the ground, causing varying degrees of environmental chemical pollution. Reinjection wells can effectively inject this part of geothermal water back into the ground to reduce environmental pollution.

[0003] During the geothermal tail water reinjection process, the bag filter device can effectively reduce the substances that cause blockage of the heat storage carried by the geothermal tail water during the movement of the pipeline, thereby ensuring smooth reinjection;

[0004] However, the bag filter device for filtering geothermal tail water pressureless reinjection wells under the existing technology still has the following shortcomings in actual use;

[0005] First, geothermal tail water needs to be filtered by bag filter during the reinjection process, and the large impurities carried by it will continue to accumulate on the bag filter. As time goes by, the accumulated impurities will affect the filtering performance of the bag filter and the reinjection efficiency of geothermal tail water. Therefore, the bag filter needs to be replaced in time. However, during the period when the bag filter is replaced, the bag filter device for geothermal tail water reinjection well under the existing technology does not have the function of effectively removing the impurities accumulated on the bag filter.

[0006] Secondly, the bag filter device for filtering geothermal tail water pressureless reinjection wells under the existing technology often needs to reinject geothermal tail water with a higher temperature in actual use. The high-temperature geothermal tail water is filtered in the bag filter device for a long time, which will damage the bag filter screen, thereby affecting the service life of the bag filter screen. That is, the bag filter device for geothermal tail water reinjection wells under the existing technology does not have the function of pre-cooling the geothermal tail water;

[0007] Therefore, in order to solve the above problems, it is necessary to provide a bag filter device for filtering geothermal tail water without pressure reinjection well. Summary of the invention

[0008] In order to overcome the above-mentioned defects of the prior art, the present invention provides a bag filter device for filtering geothermal tail water without pressure reinjection well to solve the problems existing in the above-mentioned background technology.

[0009] The present invention provides the following technical solution: a bag filter device for filtering geothermal tail water pressureless reinjection well, comprising a reinjection filter assembly, a backwash assembly is fixedly connected to the left side of the reinjection filter assembly, and a cooling assembly is fixedly connected to the right side of the reinjection filter assembly;

[0010] The reinjection filter assembly includes a reinjection well, a fixed plate is fixedly sleeved on the upper part of the reinjection well, the reinjection well is located above the fixed plate and leaks out of the ground, the reinjection well is located below the fixed plate and is buried underground, the inner wall of the bottom side of the reinjection well is fixedly sleeved with an inner well, a contact switch is fixedly installed on the upper end of the inner well, and a uniformly distributed slide rail is opened on the upper inner wall of the reinjection well, a movable disk is movably sleeved with the slide rail inside the reinjection well, a contact block is fixedly installed at the bottom edge of the movable disk, the contact block and the contact switch are aligned up and down, a fixed block is fixedly installed on the upper end of the slide rail, and uniformly distributed springs are fixedly connected between the fixed block and the upper surface edge of the movable disk, and the springs are respectively located inside the slide rail, a bottom pipe is fixedly sleeved at the center position of the movable disk, a reinjection solenoid valve is arranged inside the bottom pipe, an inner well liner is fixedly connected to the upper end of the bottom pipe, and a bag filter is fixedly installed on the upper end of the inner well liner.

[0011] Furthermore, a liquid inlet pipe is provided on the right side of the upper end of the inner well liner, a liquid inlet solenoid valve is provided inside the pipeline of the liquid inlet pipe, a sealing cover is installed on the upper end of the inner well liner, the right side inlet of the sealing cover is connected with the liquid inlet pipe, the upper end of the sealing cover is fixedly connected with a liquid outlet pipe, a liquid outlet solenoid valve is provided inside the pipe of the liquid outlet pipe, a top plate is fixedly sleeved on the outer side of the upper end of the inner well liner, a telescopic sleeve is connected at the bottom edge of the top plate, and the bottom end of the telescopic sleeve is fixedly connected to the upper end of the reinjection well.

[0012] Furthermore, a recoil pipe is fixedly connected to the outer side of the inner well tank, a through groove is opened on the left side of the telescopic sleeve, the pipeline of the recoil pipe passes through the through groove, and the contact switch is electrically connected to the re-injection solenoid valve, the liquid inlet solenoid valve and the liquid outlet solenoid valve. When the contact switch is not triggered, the re-injection solenoid valve and the liquid inlet solenoid valve are in an open state, and the liquid outlet solenoid valve is in a closed state. When the contact switch is triggered by the contact block, the re-injection solenoid valve and the liquid inlet solenoid valve are in a closed state, and the liquid outlet solenoid valve is in an open state.

[0013] Furthermore, the recoil assembly includes a recoil liquid box, which is fixedly mounted on the upper surface of the fixed plate. A recoil pump is provided in the recoil liquid box. Recoil water is stored inside the recoil liquid box. The output end of the recoil pump is connected to a recoil bellows, and the pipe end of the recoil bellows is interconnected with the recoil pipe.

[0014] Furthermore, a fixing kit is fixedly connected to the upper end of the recoil liquid box, a liquid storage cylinder is fixedly sleeved on the upper end of the fixing kit, a right sealing plate is fixedly installed on the right side of the liquid storage cylinder, the right sealing plate is communicated with the liquid outlet pipe, a left sealing plate is fixedly installed on the left side of the liquid storage cylinder, a motor is fixedly installed on the outer side of the left sealing plate, a driving end of the motor is fixedly connected to a stirring shaft, the shaft body of the stirring shaft is located inside the liquid storage cylinder, evenly distributed stirring blades are fixedly connected to the outer side of the shaft body of the stirring shaft, and a discharge pipe is fixedly connected to the upper end of the liquid storage cylinder.

[0015] Furthermore, the cooling assembly includes a liquid inlet bellows, the liquid inlet bellows and the pipe of the liquid inlet pipe are interconnected, the pipe end of the liquid inlet bellows is fixedly connected to a cooling cylinder, the right side port of the cooling cylinder is fixedly sleeved with a connecting ring, the connecting ring is fixedly sleeved with a liquid injection pipe, the outer side surface of the cooling cylinder is fixedly sleeved with a cavity heat dissipation pipe sleeve, and the right side port of the cavity heat dissipation pipe sleeve is fixedly installed with a seal.

[0016] Furthermore, fans distributed evenly are fixedly installed at the outer grooves of the cavity heat dissipation tube sleeve, and the fans are located at the leftmost end of the grooves of the cavity heat dissipation tube sleeve. A coolant box is fixedly sleeved on the outer side of the cavity heat dissipation tube sleeve, and the coolant box is fixedly connected to the upper surface of the fixed plate. A coolant pump is provided inside the coolant box, and a liquid inlet pipe is fixedly connected to the output end of the coolant pump, and the pipe end of the liquid inlet pipe is interconnected with the cavity of the cavity heat dissipation tube sleeve. A side plate is fixedly installed on the right side of the coolant box, and a liquid return pipe is connected between the seal and the side plate.

[0017] Technical effects and advantages of the present invention:

[0018] The present invention is provided with a reinjection filter assembly and a recoil assembly. The geothermal tail water is injected into the inner well tank through the liquid inlet pipe, and the large particles of impurities carried by the geothermal tail water will be intercepted and filtered by the bag filter. Then the geothermal tail water falls into the bottom side well of the reinjection well through the bottom pipe, thereby achieving the reinjection effect of the geothermal tail water. As the geothermal tail water is continuously filtered in the bag filter, the large particles of impurities carried by the geothermal tail water will accumulate on the bag filter, so that the weight borne by the bag filter is continuously increased, so that the telescopic sleeve is contracted downward, the movable disk slides downward, and finally the contact block triggers the contact switch. When the contact block triggers the contact switch When the backwash solenoid valve and the liquid inlet solenoid valve are closed and the liquid outlet solenoid valve is opened, the recoil pump can drive the recoil water to flow into the inner well tank from the recoil pipe. After the inner well tank is filled with the recoil water, it starts to flow up, thereby injecting the impurity particles accumulated on the bag filter into the liquid storage cylinder through the liquid outlet pipe. The motor can drive the stirring shaft to drive the stirring blades to rotate to stir the impurity particles and water stored here to prevent them from agglomerating with each other, thereby avoiding pipe blockage during discharge. The above structure realizes the function of the device to effectively remove the impurity particles accumulated on the bag filter.

[0019] The present invention is provided with a cooling component. Geothermal tail water is injected from the injection pipe and enters the cooling cylinder. The coolant pump can drive the coolant in the coolant box to be injected into the cavity heat dissipation pipe sleeve through the liquid inlet pipe, so that the geothermal tail water circulating in the cooling cylinder is subjected to heat exchange cooling. The fan is started to blow air to the outer groove of the cavity heat dissipation pipe sleeve, thereby accelerating its air circulation. The coolant flows back to the coolant box through the return pipe for reuse. The above structure realizes the pre-cooling function of the device for geothermal tail water. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the upper structure of the recharging filtration assembly of the present invention.

[0022] Figure 3 It is a schematic diagram of the cross-sectional structure of the recharging filtration assembly of the present invention.

[0023] Figure 4 It is a schematic diagram of the cross-sectional structure of the recoil assembly of the present invention.

[0024] Figure 5 It is a schematic diagram of the cooling assembly structure of the present invention.

[0025] Figure 6 It is a schematic diagram of the partial cross-sectional structure of the cooling component of the present invention.

[0026] The accompanying drawings are marked as follows: 1. Recharge filter assembly; 101. Recharge well; 102. Fixed plate; 103. Inner well; 104. Contact switch; 105. Slide rail; 106. Movable disk; 107. Contact block; 108. Fixed block; 109. Spring; 110. Bottom pipe; 111. Recharge solenoid valve; 112. Inner well liner; 113. Bag filter; 114. Liquid inlet pipe; 115. Liquid inlet solenoid valve; 116. Sealing cover; 117. Liquid outlet pipe; 118. Liquid outlet solenoid valve; 119. Top plate; 120. Telescopic sleeve; 121. Recoil pipe; 122. Through slot; 2. Recoil assembly; 201, recoil liquid box; 202, recoil pump; 203, recoil bellows; 204, fixing kit; 205, liquid storage cylinder; 206, right sealing plate; 207, left sealing plate; 208, motor; 209, stirring shaft; 210, stirring blade; 211, drain pipe; 3, cooling assembly; 301, liquid inlet bellows; 302, cooling cylinder; 303, connecting ring; 304, liquid injection pipe; 305, cavity heat dissipation pipe sleeve; 306, sealing element; 307, fan; 308, coolant box; 309, coolant pump; 310, liquid inlet pipe; 311, side panel; 312, liquid return pipe. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are only examples. The bag filter device for filtering geothermal tail water pressureless reinjection wells involved in the present invention is not limited to the various structures recorded in the following embodiments. All other embodiments obtained without creative work by ordinary technicians in this field belong to the scope of protection of the present invention.

[0028] Reference Figure 1 The present invention provides a bag filter device for filtering geothermal tail water pressure-free reinjection wells, comprising a reinjection filter assembly 1, a backwash assembly 2 is fixedly connected to the left side of the reinjection filter assembly 1, and a cooling assembly 3 is fixedly connected to the right side of the reinjection filter assembly 1;

[0029] In this embodiment, the re-injection filtration component 1 is used to realize the function of re-injection and filtration of geothermal tail water, the backwash component 2 is used to realize the function of stirring and storing the tail water impurities backwashed out of the re-injection filtration component 1, and the cooling component 3 is used to realize the function of cooling the geothermal tail water before re-injection. The specific structure and working principle of the above components will be described in detail later.

[0030] Reference Figure 2 and Figure 3The reinjection filter assembly 1 includes a reinjection well 101, the upper part of the reinjection well 101 is fixedly sleeved with a fixed plate 102, the reinjection well 101 is located above the fixed plate 102 and leaks out of the ground, the reinjection well 101 is located below the fixed plate 102 and is buried underground, the bottom inner wall of the reinjection well 101 is fixedly sleeved with an inner well 103, the upper end of the inner well 103 is fixedly installed with a contact switch 104, the upper inner wall of the reinjection well 101 is provided with evenly distributed slide rails 105, the interior of the reinjection well 101 is movably sleeved with a movable disk 106 by means of the slide rails 105, and the movable disk 106 is movably sleeved with the slide rails 105. A contact block 107 is fixedly installed at the bottom edge of the slide rail 106, and the contact block 107 is aligned with the contact switch 104 up and down. A fixed block 108 is fixedly installed on the upper end of the slide rail 105. Evenly distributed springs 109 are fixedly connected between the fixed block 108 and the upper surface edge of the movable disk 106. The springs 109 are respectively located inside the slide rail 105. A bottom pipe 110 is fixedly sleeved at the center position of the movable disk 106. A recharge solenoid valve 111 is provided inside the bottom pipe 110. An inner well liner 112 is fixedly connected to the upper end of the bottom pipe 110. A bag filter 113 is fixedly installed on the upper end of the inner well liner 112. A liquid inlet pipe 114 is provided on the right side of the upper end of the well 112, and a liquid inlet solenoid valve 115 is provided inside the pipeline of the liquid inlet pipe 114. A sealing cover 116 is installed on the upper end of the inner well 112, and the right inlet of the sealing cover 116 is communicated with the liquid inlet pipe 114. A liquid outlet pipe 117 is fixedly connected to the upper end of the sealing cover 116, and a liquid outlet solenoid valve 118 is provided inside the liquid outlet pipe 117. A top plate 119 is fixedly sleeved on the outer side of the upper end of the inner well 112, and a telescopic sleeve 120 is connected to the bottom edge of the top plate 119. The bottom end of the telescopic sleeve 120 is fixedly connected to the upper end of the reinjection well 101. A recoil pipe 121 is fixedly connected to the outside of the telescopic sleeve 120, a through slot 122 is opened on the left side of the telescopic sleeve 120, and the pipeline of the recoil pipe 121 passes through the through slot 122. The contact switch 104 is electrically connected to the re-injection electromagnetic valve 111, the liquid inlet electromagnetic valve 115 and the liquid outlet electromagnetic valve 118. When the contact switch 104 is not triggered, the re-injection electromagnetic valve 111 and the liquid inlet electromagnetic valve 115 are in an open state, and the liquid outlet electromagnetic valve 118 is in a closed state. When the contact switch 104 is triggered by the contact block 107, the re-injection electromagnetic valve 111 and the liquid inlet electromagnetic valve 115 are in a closed state, and the liquid outlet electromagnetic valve 118 is in an open state.

[0031] In this embodiment, geothermal tail water is injected into the inner well 112 through the liquid inlet pipe 114, and the large particles of impurities carried by it will be intercepted and filtered by the bag filter 113, and then the geothermal tail water falls into the bottom side well of the reinjection well 101 through the bottom pipe 110, thereby achieving the reinjection effect of the geothermal tail water. As the geothermal tail water is continuously filtered in the bag filter 113, the large particles of impurities carried by it will accumulate on the bag filter 113, so that the weight of the bag filter 113 is continuously increased, so that the telescopic sleeve 120 is downward. The movable disk 106 contracts, and slides downward, and finally the contact block 107 triggers the contact switch 104, so that the backwash solenoid valve 111 and the liquid inlet solenoid valve 115 are closed, and the liquid outlet solenoid valve 118 is opened. At this time, the backwash water will flow into the inner well tank 112 from the backwash pipe 121, and start to flow up after filling the inner well tank 112, so that the impurity particles accumulated on the bag filter 113 are taken away from the upper end space of the inner well tank 112 through the liquid outlet pipe 117. The working principle of the backwash water and the treatment of the impurity particles will be described in detail later.

[0032] Reference Figure 4 The recoil assembly 2 includes a recoil liquid box 201, which is fixedly mounted on the upper surface of the fixed plate 102. A recoil pump 202 is provided in the recoil liquid box 201. Recoil water is stored in the recoil liquid box 201. The output end of the recoil pump 202 is connected to a recoil bellows 203. The pipe end of the recoil bellows 203 is connected to the recoil pipe 121. The upper end of the recoil liquid box 201 is fixedly connected to a fixing kit 204. The upper end of the fixing kit 204 is fixedly sleeved with a liquid storage cylinder 205. The liquid storage cylinder A right sealing plate 206 is fixedly installed on the right side of 205, and the right sealing plate 206 is communicated with the liquid outlet pipe 117. A left sealing plate 207 is fixedly installed on the left side of the liquid storage cylinder 205, and a motor 208 is fixedly installed on the outer side of the left sealing plate 207. A stirring shaft 209 is fixedly connected to the driving end of the motor 208. The shaft body of the stirring shaft 209 is located inside the liquid storage cylinder 205, and the outer side of the shaft body of the stirring shaft 209 is fixedly connected with uniformly distributed stirring blades 210. The upper end of the liquid storage cylinder 205 is fixedly connected to a discharge pipe 211;

[0033] In this embodiment, when the contact block 107 triggers the contact switch 104, so that the re-injection solenoid valve 111 and the liquid inlet solenoid valve 115 are closed, and the liquid outlet solenoid valve 118 is opened, the backwash pump 202 can drive the backwash water to flow into the inner well 112 from the backwash pipe 121. After the backwash water fills the inner well 112, it begins to flow up, thereby injecting the impurity particles accumulated on the bag filter 113 into the interior of the liquid storage cylinder 205 through the liquid outlet pipe 117. The motor 208 can drive the stirring shaft 209 to drive the stirring blade 210 to rotate to stir the impurity particles mixed with the water stored here to prevent them from agglomerating with each other, thereby avoiding pipe blockage during discharge. The above structure realizes the function of the device to effectively remove the impurity particles accumulated on the bag filter 113.

[0034] Reference Figure 5 and Figure 6 The cooling assembly 3 includes a liquid inlet bellows 301, the liquid inlet bellows 301 is connected to the pipeline of the liquid inlet pipe 114, the pipeline end of the liquid inlet bellows 301 is fixedly connected to a cooling cylinder 302, the right port of the cooling cylinder 302 is fixedly sleeved with a connecting ring 303, the connecting ring 303 is fixedly sleeved with a liquid injection pipe 304, the outer side of the cooling cylinder 302 is fixedly sleeved with a cavity heat dissipation pipe sleeve 305, the right port of the cavity heat dissipation pipe sleeve 305 is fixedly installed with a sealing member 306, and the outer groove of the cavity heat dissipation pipe sleeve 305 is fixedly installed with a uniformly distributed fan 307 The fan 307 is located at the leftmost end of the slot of the cavity heat dissipation sleeve 305. A coolant box 308 is fixedly sleeved on the outside of the cavity heat dissipation sleeve 305. The coolant box 308 is fixedly connected to the upper surface of the fixed plate 102. A coolant pump 309 is arranged inside the coolant box 308. The output end of the coolant pump 309 is fixedly connected to a liquid inlet pipe 310. The pipe end of the liquid inlet pipe 310 is connected to the cavity of the cavity heat dissipation sleeve 305. A side plate 311 is fixedly installed on the right side of the coolant box 308. A liquid return pipe 312 is connected between the seal 306 and the side plate 311.

[0035] In this embodiment, geothermal tail water is injected from the injection pipe 304 and enters the cooling cylinder 302. The coolant pump 309 can drive the coolant in the coolant box 308 to be injected into the cavity heat dissipation pipe sleeve 305 through the liquid inlet pipe 310, so that the geothermal tail water circulating in the cooling cylinder 302 is subjected to heat exchange cooling. The fan 307 is started to blow air to the outer groove of the cavity heat dissipation pipe sleeve 305, thereby accelerating its air circulation. The coolant flows back to the coolant box 308 through the return pipe 312 for reuse. The above structure realizes the pre-cooling function of the device for geothermal tail water.

[0036] The working principle of the present invention is as follows: geothermal tail water is injected into the inner well 112 through the liquid inlet pipe 114, and the large particles of impurities carried by it will be intercepted and filtered by the bag filter 113, and then the geothermal tail water falls into the bottom side well of the reinjection well 101 through the bottom pipe 110, thereby achieving the reinjection effect of the geothermal tail water. As the geothermal tail water is continuously filtered in the bag filter 113, the large particles of impurities carried by it will accumulate on the bag filter 113, so that the weight borne by the bag filter 113 The backwash pump 202 is continuously lifted, so that the telescopic sleeve 120 contracts downward, the movable disk 106 slides downward, and finally the contact block 107 triggers the contact switch 104. When the contact block 107 triggers the contact switch 104, the backwash solenoid valve 111 and the liquid inlet solenoid valve 115 are closed, and the liquid outlet solenoid valve 118 is opened, the backwash pump 202 can drive the backwash water to flow into the inner well 112 from the backwash pipe 121. After the backwash water fills the inner well 112, it starts to flow up, thereby removing the accumulated liquid in the bag filter. The impurity particles on 113 are injected into the interior of the liquid storage cylinder 205 through the liquid outlet pipe 117, and the motor 208 can drive the stirring shaft 209 to drive the stirring blade 210 to rotate to stir the impurity particles and the mixed water stored here to prevent them from agglomerating with each other, thereby avoiding pipe blockage during drainage. The above structure realizes the function of the device to effectively remove the impurity particles accumulated on the bag filter 113, and the geothermal tail water is injected from the injection pipe 304 and enters the cooling cylinder 302. The coolant pump 309 can drive the coolant in the coolant box 308 to be injected into the cavity heat dissipation pipe sleeve 305 through the liquid inlet pipe 310, so that the geothermal tail water circulating in the cooling cylinder 302 is heat exchanged and cooled, and the fan 307 is started to blow air to the outer slot of the cavity heat dissipation pipe sleeve 305, thereby accelerating its air circulation, and the coolant flows back to the coolant box 308 through the return pipe 312 for reuse, and the above structure realizes the pre-cooling function of the device for geothermal tail water.

[0037] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0038] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0039] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A bag filter device for filtering geothermal tail water without pressure reinjection well, characterized in that: It comprises a recharging filter assembly (1), wherein the left side of the recharging filter assembly (1) is fixedly connected to a backwash assembly (2), and the right side of the recharging filter assembly (1) is fixedly connected to a cooling assembly (3); The reinjection filter assembly (1) comprises a reinjection well (101), the upper part of the reinjection well (101) is fixedly sleeved with a fixing plate (102), the reinjection well (101) is located above the fixing plate (102) and leaks out of the ground, the reinjection well (101) is located below the fixing plate (102) and is buried underground, the bottom inner wall of the reinjection well (101) is fixedly sleeved with an inner well (103), the upper end of the inner well (103) is fixedly mounted with a contact switch (104), the upper inner wall of the reinjection well (101) is provided with evenly distributed slide rails (105), the interior of the reinjection well (101) is movably sleeved with a movable disk (106) by means of the slide rails (105), and the movable disk (106) is movably sleeved with the slide rails (105), and the movable disk (106) is movably sleeved with the slide rails (105). A contact block (107) is fixedly mounted at the bottom edge of the slide rail (106), the contact block (107) being aligned with the contact switch (104) in the upper and lower parts, a fixed block (108) is fixedly mounted at the upper end of the slide rail (105), and evenly distributed springs (109) are fixedly connected between the fixed block (108) and the upper surface edge of the movable disk (106), the springs (109) being respectively located inside the slide rail (105), a bottom tube (110) is fixedly sleeved at the center position of the movable disk (106), a recharging solenoid valve (111) is provided inside the bottom tube (110), an inner well liner (112) is fixedly connected to the upper end of the bottom tube (110), and a bag filter (113) is fixedly mounted at the upper end of the inner well liner (112).

2. A bag filter device for filtering geothermal tail water pressureless reinjection well according to claim 1, characterized in that: A liquid inlet pipe (114) is provided on the right side of the upper end of the inner well liner (112), and a liquid inlet solenoid valve (115) is provided inside the pipe of the liquid inlet pipe (114). A sealing cover (116) is installed on the upper end of the inner well liner (112), and the right inlet of the sealing cover (116) is in communication with the liquid inlet pipe (114). A liquid outlet pipe (117) is fixedly connected to the upper end of the sealing cover (116), and a liquid outlet solenoid valve (118) is provided inside the pipe of the liquid outlet pipe (117). A top plate (119) is fixedly sleeved on the outer side of the upper end of the inner well liner (112), and a telescopic sleeve (120) is connected to the bottom edge of the top plate (119), and the bottom end of the telescopic sleeve (120) is fixedly connected to the upper end of the reinjection well (101).

3. A bag filter device for filtering geothermal tail water pressureless reinjection wells according to claim 2, characterized in that: A recoil pipe (121) is fixedly connected to the outside of the inner well (112); a through slot (122) is provided on the left side of the telescopic sleeve (120); a pipe of the recoil pipe (121) passes through the through slot (122); the contact switch (104) is electrically connected to the re-injection solenoid valve (111), the liquid inlet solenoid valve (115), and the liquid outlet solenoid valve (118); when the contact switch (104) is not triggered, the re-injection solenoid valve (111) and the liquid inlet solenoid valve (115) are both in an open state, and the liquid outlet solenoid valve (118) is in a closed state; when the contact switch (104) is triggered by the contact block (107), the re-injection solenoid valve (111) and the liquid inlet solenoid valve (115) are both in a closed state, and the liquid outlet solenoid valve (118) is in an open state.

4. A bag filter device for filtering geothermal tail water without pressure reinjection well according to claim 1, characterized in that: The recoil assembly (2) comprises a recoil liquid box (201), the recoil liquid box (201) being fixedly mounted on the upper surface of a fixed plate (102), a recoil pump (202) being arranged in the recoil liquid box (201), recoil water being stored inside the recoil liquid box (201), an output end of the recoil pump (202) being connected to a recoil bellows (203), and a pipe end of the recoil bellows (203) being connected to a recoil pipe (121).

5. A bag filter device for filtering geothermal tail water without pressure reinjection well according to claim 4, characterized in that: The upper end of the recoil liquid box (201) is fixedly connected to a fixing kit (204), the upper end of the fixing kit (204) is fixedly sleeved with a liquid storage cylinder (205), a right sealing plate (206) is fixedly installed on the right side of the liquid storage cylinder (205), the right sealing plate (206) and the liquid outlet pipe (117) are in communication with each other, a left sealing plate (207) is fixedly installed on the left side of the liquid storage cylinder (205), a motor (208) is fixedly installed on the outer side of the left sealing plate (207), a driving end of the motor (208) is fixedly connected to a stirring shaft (209), the shaft body of the stirring shaft (209) is located inside the liquid storage cylinder (205), and evenly distributed stirring blades (210) are fixedly connected to the outer side of the shaft body of the stirring shaft (209), and a liquid discharge pipe (211) is fixedly connected to the upper end of the liquid storage cylinder (205).

6. The bag filter device for filtering geothermal tail water pressureless reinjection well according to claim 1 is characterized by: The cooling assembly (3) comprises a liquid inlet bellows (301), the liquid inlet bellows (301) and the pipeline of the liquid inlet pipe (114) are interconnected, the pipeline end of the liquid inlet bellows (301) is fixedly connected to a cooling cylinder (302), the right side port of the cooling cylinder (302) is fixedly sleeved with a connecting ring (303), the connecting ring (303) is fixedly sleeved with a liquid injection pipe (304), the outer side surface of the cooling cylinder (302) is fixedly sleeved with a cavity heat dissipation pipe sleeve (305), and the right side port of the cavity heat dissipation pipe sleeve (305) is fixedly installed with a sealing member (306).

7. A bag filter device for filtering geothermal tail water pressureless reinjection wells according to claim 6, characterized in that: A fan (307) distributed evenly is fixedly installed at the outer groove of the cavity heat dissipation tube sleeve (305), and the fan (307) is located at the leftmost end of the groove of the cavity heat dissipation tube sleeve (305). A coolant box (308) is fixedly sleeved on the outer side of the cavity heat dissipation tube sleeve (305), and the coolant box (308) is fixedly connected to the upper surface of the fixed plate (102). A coolant pump (309) is provided inside the coolant box (308), and an output end of the coolant pump (309) is fixedly connected to a liquid inlet pipe (310), and a pipe end of the liquid inlet pipe (310) is mutually connected to the cavity of the cavity heat dissipation tube sleeve (305). A side plate (311) is fixedly installed on the right side of the coolant box (308), and a liquid return pipe (312) is connected between the sealing member (306) and the side plate (311).

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