Geothermal tailwater reinjection device

Abstract

The application discloses a geothermal tail water recharge device and relates to the technical field of geothermal water wells.The geothermal tail water recharge device comprises a filter, a water pump and a recharge pipe which are sequentially connected through pipelines.The filter comprises a filter cavity, a filter bag cage is arranged in the filter cavity, and a filter bag is arranged outside the filter bag cage.A sealing cover is arranged on the top of the filter cavity, a tail water inlet pipe is arranged on the side wall of the filter cavity, and the filter bag cage is arranged below the tail water inlet pipe.A plurality of clean water outlet pipes are evenly arranged on the side wall of the filter cavity, a water collecting cavity is connected to the tail ends of the plurality of clean water outlet pipes, a total water outlet pipe is arranged on the water collecting cavity, and the total water outlet pipe is connected with the water pump inlet.The axis of the clean water outlet pipe is not intersected with the axis of the filter cavity, and the axis of the clean water outlet pipe is arranged in the middle of the filter bag cage.A turbine is arranged in the recharge pipe.The geothermal tail water recharge device forms a cyclone in the filter cavity through the clean water outlet pipe, prevents impurities from flowing out, and prevents the recharge pipe from being blocked by small impurities through the arrangement of the turbine in the recharge pipe, the centrifugal effect of the turbine on water and the radial impact of the turbine on the pipe wall.

Description

Technical Field

[0001] The present invention relates to the technical field of geothermal water wells, in particular to a geothermal tail water reinjection device. Background Art

[0002] Geothermal energy is renewable heat from deep within the Earth, originating from the decay of molten magma and radioactive materials. Deep groundwater circulation and the intrusion of magma from deep within the Earth's crust carry heat from deep underground to near the surface. Humans utilize geothermal energy by drilling geothermal wells, bringing it to the surface in the form of hot water or steam. Currently, geothermal energy is widely used for power generation, heating, greenhouses, aquaculture, rehabilitation medicine, chemical raw material extraction, tourism, and bottled mineral water. While extraction is increasing, much of the extracted geothermal water is discharged to the surface, causing thermal and chemical pollution. This also causes the static water level in geothermal wells to drop annually. This long-term trend will inevitably lead to waste and depletion of geothermal water. As the only medium for developing deep geothermal energy, geothermal water is limited by the head capacity and economic efficiency of submersible pumps. When the water level drops below a certain depth, extracting geothermal energy becomes economically unviable, and the utilized heat energy at this point represents only a few ten-thousandths of the reservoir's total thermal reserves. In order to avoid thermal and chemical pollution caused by direct discharge of geothermal wastewater and to maintain the heat storage pressure, geothermal tailwater needs to be recharged. However, existing geothermal tailwater recharge devices have the following defects:

[0003] Although the existing geothermal tail water reinjection device has added filtering equipment, the geothermal tail water contains too much sediment and ore, and the filtering effect is poor, which can easily cause the reinjection pipe and reinjection well to be blocked, making the geothermal tail water reinjection ineffective. Summary of the Invention

[0004] The main purpose of the present invention is to provide a geothermal tailwater reinjection device to solve the above problems.

[0005] To achieve the above-mentioned purpose, the present invention provides a geothermal tailwater reinjection device, comprising a filter, a water pump, and a reinjection pipe connected in sequence by pipelines; the filter comprises a filter chamber, a filter bag cage is provided in the filter chamber, and a filter bag is wrapped on the outside of the filter bag cage; a sealing cover is provided on the top of the filter chamber, a tailwater inlet pipe is provided on the side wall of the filter chamber, and the filter bag cage is located below the tailwater inlet pipe; a plurality of clean water outlet pipes are evenly arranged on the side wall of the filter chamber in a circumferential direction, and the ends of the plurality of clean water outlet pipes are connected to a water collecting chamber, a main outlet pipe is provided on the water collecting chamber, and the main outlet pipe is connected to the water pump inlet; the axis of the clean water outlet pipe does not intersect with the axis of the filter chamber; the axis of the clean water outlet pipe is located in the middle of the filter bag cage; a turbine is provided for rotation in the reinjection pipe.

[0006] Furthermore, a limiting rod for limiting the axial movement of the filter bag cage frame is provided at the bottom of the sealing cover.

[0007] Furthermore, a fixing device for fixing the sealing cover to the top of the filter cavity is provided on the top of the filter cavity.

[0008] Furthermore, the sealing cover is provided with a pressure gauge for monitoring the internal pressure of the filter cavity.

[0009] Furthermore, both ends of the recharging pipe are provided with fixing frames; and both ends of the turbine are connected to the fixing frames via bearings.

[0010] Furthermore, the fixing device includes a swing bolt hinged to the top of the filter chamber and a lifting eye nut matched with the swing bolt.

[0011] The present invention forms a vortex inside the filter chamber through a plurality of evenly arranged purified water outlet pipes, effectively slowing down the adsorption of impurities on the filter bag. At the same time, a pressure gauge is provided to monitor the internal pressure to prevent excessive pressure from causing impurities to burst the filter bag and cause impurities to be lost. A turbine is provided in the recharge pipe, and the water flow rate impacts the turbine, driving the turbine to rotate. The turbine causes the water to produce a centrifugal effect, changes the direction of the water flow, and radially impacts the pipe wall, preventing fine impurities in the water from gathering on the pipe wall and clogging the recharge pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the geothermal tail water reinjection device of the present invention.

[0013] Figure 2 This is an exploded view of the filter of the geothermal tail water reinjection device of the present invention.

[0014] Figure 3 This is a schematic diagram of the top of the reinjection pipe of the geothermal tail water reinjection device of the present invention.

[0015] Among them, 1-filter; 2-water pump; 3-reinjection pipe; 4-rock and soil layer; 5-geothermal water layer; 11-fixing device; 12-tailwater inlet pipe; 13-filter chamber; 14-clean water outlet pipe; 15-water collecting chamber; 16-main outlet pipe; 17-filter bag cage frame; 18-sealing cover; 19-filter bag; 31-fixing frame; 32-turbine; 33-bearing; 181-pressure gauge; 182-limit rod. DETAILED DESCRIPTION

[0016] In order to achieve the above-mentioned objectives and effects, the technical means and structures adopted by the present invention are described in detail with reference to the accompanying drawings for the features and functions of the preferred embodiments of the present invention.

[0017] As shown in the figure, the present invention provides a geothermal tailwater reinjection device, including a filter 1, a water pump 2, and a reinjection pipe 3 connected in sequence by pipelines; the filter 1 includes a filter chamber 13, a filter bag cage 17 is provided in the filter chamber 13, and a filter bag 19 is wrapped on the outside of the filter bag cage 17; a sealing cover 18 is provided on the top of the filter chamber 13, a tailwater inlet pipe 12 is provided on the side wall of the filter chamber 13, and the filter bag cage 17 is located below the tailwater inlet pipe 12; a plurality of clean water outlet pipes 14 are evenly arranged on the side wall of the filter chamber 13 in a circumferential direction, and the ends of the plurality of clean water outlet pipes 14 are connected to a water collecting chamber 15, and a main water outlet pipe 16 is provided on the water collecting chamber 15, and the main water outlet pipe 16 is connected to the inlet of the water pump 2; the axis of the clean water outlet pipe 14 does not intersect with the axis of the filter chamber 13; the axis of the clean water outlet pipe 14 is located in the middle of the filter bag cage 17; a turbine 32 is provided for rotation in the reinjection pipe 3. During installation, the recharge pipe 3 is inserted into the recharge well of the rock and soil layer 4 , and the bottom of the recharge pipe 3 extends into the geothermal water layer 5 .

[0018] In another embodiment, a limiting rod 182 for limiting the axial movement of the filter bag cage 17 is provided at the bottom of the sealing cover 18, and the limiting rod 182 is in contact with the top of the filter bag cage 17; a pressure gauge 181 for monitoring the internal pressure of the filter chamber 13 is provided at the top. A fixing device 11 for fixing the sealing cover 18 to the top of the filter chamber 13 is provided at the top of the filter chamber 13. The fixing device includes a hinged bolt hinged to the top of the filter chamber 13 and a lifting eye nut adapted to the hinge bolt. If the pressure exceeds the specified range, an alarm is triggered and the machine is shut down. By opening the fixing device 11, the sealing cover 18 is removed, and the filter bag cage 17 and the filter bag 19 are taken out for cleaning or replacement.

[0019] In another embodiment, both ends of the recharge pipe 3 are provided with a fixing frame 31; both ends of the turbine 32 are connected to the fixing frame 31 via bearings 33. If the recharge well is deep, multiple recharge pipes 3 can be connected together, and the turbines 32 can also be connected through couplings.

[0020] The above descriptions are only preferred embodiments of the present invention, not all embodiments. Anyone should be aware that any structural changes made under the guidance of the present invention, and any technical solutions that are the same or similar to those of the present invention, fall within the scope of protection of the present invention.

Claims

1. A geothermal tailwater recharge device, characterized in that: It comprises a filter, a water pump and a recharge pipe which are connected in sequence by pipelines; the filter comprises a filter chamber, a filter bag cage is provided in the filter chamber, and a filter bag is wrapped on the outside of the filter bag cage; a sealing cover is provided on the top of the filter chamber, a tail water inlet pipe is provided on the side wall of the filter chamber, and the filter bag cage is located below the tail water inlet pipe; a plurality of clean water outlet pipes are evenly arranged on the side wall of the filter chamber in a circumferential direction, the ends of the plurality of clean water outlet pipes are connected to a water collecting chamber, a main water outlet pipe is provided on the water collecting chamber, and the main water outlet pipe is connected to the water pump inlet; the axis of the clean water outlet pipe does not intersect with the axis of the filter chamber; the axis of the clean water outlet pipe is located in the middle of the filter bag cage; a turbine is provided for rotation in the recharge pipe.

2. The geothermal tail water recharge device according to claim 1, characterized in that: A limiting rod for limiting the axial movement of the filter bag cage frame is provided at the bottom of the sealing cover.

3. The geothermal tail water reinjection device according to claim 1 or 2, characterized in that: The top of the filter cavity is provided with a fixing device for fixing the sealing cover to the top of the filter cavity.

4. The geothermal tail water recharge device according to claim 3, characterized in that: The sealing cover is provided with a pressure gauge for monitoring the internal pressure of the filter cavity.

5. The geothermal tail water reinjection device according to claim 1, characterized in that: Both ends of the recharging pipe are provided with fixing frames; and both ends of the turbine are connected to the fixing frames through bearings.

6. The geothermal tail water reinjection device according to claim 3, characterized in that: The fixing device comprises a swing bolt hinged to the top of the filter chamber and a lifting eye nut matched with the swing bolt.

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