Geothermal tail water recharge anti-blocking filter and pressurizing equipment

Abstract

The utility model relates to a kind of geothermal tail water recharge anti-blocking filtration and pressurization equipment, belong to geothermal tail water recharge equipment technical field.The geothermal tail water recharge anti-blocking filtration and pressurization equipment, comprising: pressurization pump and recharge pipe, the pressurization pump is communicated with recharge pipe by pipeline;The dredging mechanism includes the dredging block of slidingly being arranged in the inside of recharge pipe, the inner wall of the recharge pipe is below dredging block and is equipped with water passage, the recharge pipe is equipped with collection cavity between water passage and dredging block;By setting dredging block cooperation isolation frame, the scale that dredging plate is scraped from pipe wall is collected, when dredging block is scraped inside wall scale after sliding in recharge pipe, scraped particulate matter can be guided and housed in collection cavity, instead of continue with mainstream to move downstream, isolation frame and the like structure further form physical barrier or temporary storage area in flow channel, the effective entrapment and physical isolation to scale and dirt that have fallen off are realized.

Description

Technical Field

[0001] This utility model relates to the technical field of geothermal tailwater reinjection equipment, and in particular to a geothermal tailwater reinjection anti-clogging filtration and pressurization device. Background Technology

[0002] Geothermal tailwater refers to the geothermal water that has cooled down after being extracted from a geothermal well and having its heat extracted. Geothermal tailwater reinjection refers to the process of injecting this cooled tailwater back into the original underground geothermal reservoir through a dedicated well. Its core purpose is to maintain underground resource pressure to ensure long-term stable extraction, prevent the discharge of tailwater containing minerals from causing surface environmental pollution, and avoid geological problems such as ground subsidence that may be caused by underground fluid depletion.

[0003] As shown in the reference case "A Geothermal Tailwater Reinjection Device" (Announcement No. CN220601834U), the geothermal tailwater is pressurized by a pressurizing pump and a water injection pipe. Then, the geothermal tailwater is reinjected into the ground through the water injection pipe. At this time, the tailwater enters the interior of the water injection pipe and pushes the unblocking plate to slide. The unblocking plate slides to the annular groove and abuts against the first limiting block. The first limiting block limits the unblocking plate. During the sliding process, the unblocking plate can unblock the inner wall of the water injection pipe and scrape off the scale particles on the inner wall of the water injection pipe, thereby reducing the possibility of blockage of the water injection pipe. The annular groove is provided so that the tailwater can flow from the upper part of the water injection pipe to the lower part through the annular groove. Although the aforementioned application can achieve the effect of scraping away scale particles on the inner wall of the water injection pipe by sliding the squeegee inside, thus preventing blockage, the scraped scale particles do not form an isolation from the pipe. Instead, they continue to move inside the water injection pipe with the water flow. These suspended particles are very likely to re-deposit and adhere in the downstream part of the pipe, thus forming a new scale layer. This results in incomplete unblocking, a short anti-blocking cycle, and the problem may recur. Utility Model Content

[0004] Therefore, it is necessary to provide a geothermal tailwater reinjection anti-clogging filtration and pressurization device to address the problem of poor pipeline dredging effect mentioned in the above applications.

[0005] A geothermal tailwater reinjection anti-clogging filtration and pressurization device includes: a pressurization pump and a reinjection pipe, wherein the pressurization pump and the reinjection pipe are connected by a pipeline; A dredging mechanism includes a dredging block that is slidably disposed inside a recharge pipe. A water passage cavity is formed on the inner wall of the recharge pipe below the dredging block, and a collection cavity is formed between the water passage cavity and the dredging block in the recharge pipe.

[0006] In one embodiment, a fixing pipe is fixedly connected to the inner wall of the reinjection pipe, and a connecting rod is slidably connected to the inner wall of the fixing pipe. A spring is fixedly connected between the top end of the connecting rod and the inner wall of the fixing pipe.

[0007] In one embodiment, the bottom end of the connecting rod passes through the fixing tube and is fixedly connected to the top end of the unblocking block. Two hinge blocks are hinged to the surface of the unblocking block. The two hinge blocks are semi-circular and arranged opposite to each other on the surface of the unblocking block. A torsion spring is provided between the unblocking block and the hinge blocks.

[0008] In one embodiment, an isolation frame is fixedly connected to the inner wall of the reinjection pipe, and the isolation frame is correspondingly arranged with the collection chamber.

[0009] In one embodiment, an isolation ring is provided above the isolation frame, and a plurality of drive rods are fixedly connected to the top of the isolation ring. The isolation ring is slidably disposed on the inner wall of the reinjection pipe.

[0010] In one embodiment, an adjusting block is fixedly connected to the surface of the drive rod, a telescopic block is slidably connected to the inner wall of the adjusting block, and a plurality of springs are fixedly connected between the telescopic block and the inner wall of the adjusting block. The cross-section of the telescopic block is an isosceles trapezoid.

[0011] In one embodiment, magnetic blocks are embedded at both the upper and lower ends of the adjusting block, and magnetic blocks that cooperate with the adjusting block are embedded in the inner wall of the recharge pipe.

[0012] In one embodiment, the reinjection pipe is fixedly connected to two limiting blocks at the location of the water passage cavity, and the limiting blocks are located in the middle of the water passage cavity. Beneficial effects

[0013] 1. By setting up a dredging block in conjunction with an isolation frame, the scale that falls from the pipe wall by the dredging plate is collected. When the dredging block slides and scrapes off the scale on the inner wall in the return pipe, the scraped particles can be guided and contained in the collection chamber, instead of continuing to move downstream with the main flow. The isolation frame and other structures further form a physical barrier or temporary storage area in the flow channel, which effectively intercepts and physically isolates the detached scale, thus preventing its re-attachment and deposition downstream of the pipe from the source. 2. By setting an isolation frame and an isolation ring at the collection chamber, the collection chamber can be sealed after the reinjection is completed without affecting the water flow. This prevents the structure in the collection chamber from floating out of the collection chamber. Under the premise of ensuring smooth water flow and stable pressure during the online operation of the system, the system can achieve long-term retention of detached scale and debris, effectively reducing the secondary escape of collected materials caused by water flow impact or pressure fluctuation. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the recharge pipe of this utility model; Figure 3 This is a schematic diagram showing the connection between the hinge block and the unblocking block of this utility model; Figure 4 This is a schematic diagram of the installation of the isolation frame and the collection cavity of this utility model; Figure 5 This is a schematic diagram of the installation of the isolation frame and isolation ring of this utility model; Figure 6 for Figure 5 Enlarged view of point A in the middle.

[0016] Figure label: 100. Booster pump; 200. Recharge pipe; 300. Unblocking mechanism; 310. Unblocking block; 311. Hinge block; 312. Connecting rod; 320. Water passage chamber; 321. Collection chamber; 330. Isolation ring; 331. Drive rod; 332. Adjusting block; 333. Telescopic block; 334. Magnetic block; 340. Isolation frame. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0018] The following is combined with Figures 1-6 This invention describes a geothermal tailwater reinjection anti-clogging filtration and pressurization device.

[0019] In one embodiment, a geothermal tailwater reinjection anti-clogging filtration and pressurization device includes: a pressurization pump 100 and a reinjection pipe 200, wherein the pressurization pump 100 and the reinjection pipe 200 are connected by a pipeline. The unblocking mechanism 300 includes an unblocking block 310 that is slidably disposed inside the return pipe 200. A water passage cavity 320 is provided on the inner wall of the return pipe 200 below the unblocking block 310. A collection cavity 321 is provided between the water passage cavity 320 and the unblocking block 310 in the return pipe 200.

[0020] The booster pump 100 in this device drives the impeller or plunger to rotate or reciprocate at high speed through its internal electric motor, directly converting mechanical energy into the pressure energy and kinetic energy of the water, thereby pressurizing the tailwater flowing into the pump chamber. During the pressurization process, the core function of the industrial standard-designed booster pump 100 is not filtration. To ensure the long-term stable operation of the pump body and prevent the internal flow channels and moving parts from being worn or blocked by solid particles, a dedicated filter screen is independently installed at the front end of the inlet of the booster pump 100. This pre-filter unit will remove most of the impurities in the tailwater, ensuring that the water entering the booster pump 100 is relatively clean. The unblocking mechanism 300 of this device can be set in several sets according to the length of the return pipe 200 inside the pipe wall as needed.

[0021] like Figure 1 , Figure 2 and Figure 3 As shown, a fixed pipe is fixedly connected to the inner wall of the recharge pipe 200. A connecting rod 312 is slidably connected to the inner wall of the fixed pipe. A spring is fixedly connected between the top end of the connecting rod 312 and the inner wall of the fixed pipe. The bottom end of the connecting rod 312 passes through the fixed pipe and is fixedly connected to the top end of the unblocking block 310. Two hinge blocks 311 are hinged to the surface of the unblocking block 310. The two hinge blocks 311 are semi-circular and arranged opposite each other on the surface of the unblocking block 310. A torsion spring is provided between the unblocking block 310 and the hinge blocks 311. Two limiting blocks are fixedly connected to the recharge pipe 200 at the position of the water passage cavity 320. The limiting blocks are located in the middle of the water passage cavity 320.

[0022] In this embodiment, at the end of the working cycle, the tailwater backfilling stops, and the booster pump 100 stops accordingly. At this time, the water flow thrust on the unblocking plate disappears, and the spring between the connecting rod 312 and the fixed pipe, which has always been in a stretched and energy-storing state, begins to release its elastic potential energy, driving the connecting rod 312 and causing the unblocking plate to move upward to reset. During the reset and upward movement, the unblocking plate will contact and push the adjusting block 332 again, causing it to move upward synchronously to the initial position; thereby causing the isolation ring 330 to block the upper opening of the isolation frame 340. It is worth noting that when the unblocking plate and the hinge block 311 move to the corresponding area of ​​the adjusting block 332, its structure will cause the hinge block to... 311 rotates around the outside of the unblocking plate around the hinge axis. This process simultaneously tightens and stores energy in the torsion spring between the two. When the hinge block 311 passes the telescopic block 333, the torsion spring drives the hinge block 311 to reset. At this time, the hinge block 311 and the unblocking plate are unfolded at a certain angle, so that a gap is formed between the unblocking plate assembly and the inner wall of the pipe. As the residual water in the system flows naturally under the action of gravity or pressure balance, the water can pass through the gap and continuously flush the upper surface of the unfolded hinge block 311, thereby effectively removing the scale particles that may be attached to its surface, realizing the cleaning of the unblocking mechanism 300 itself, and preparing for the next working cycle.

[0023] like Figure 4 , Figure 5 and Figure 6 As shown, an isolation frame 340 is fixedly connected to the inner wall of the recharge pipe 200, and the isolation frame 340 is correspondingly arranged with the collection chamber 321. An isolation ring 330 is arranged above the isolation frame 340, and multiple drive rods 331 are fixedly connected to the top of the isolation ring 330. The isolation ring 330 is slidably disposed on the inner wall of the recharge pipe 200. An adjusting block 332 is fixedly connected to the surface of the drive rod 331, and a telescopic block 333 is slidably connected to the inner wall of the adjusting block 332. Multiple springs are fixedly connected between the telescopic block 333 and the inner wall of the adjusting block 332. The cross-section of the telescopic block 333 is an isosceles trapezoid. Magnetic blocks 334 are embedded at both the upper and lower ends of the adjusting block 332, and magnetic blocks 334 that cooperate with the adjusting block 332 are embedded in the inner wall of the recharge pipe 200.

[0024] In this embodiment, the scraping edge of the hinge block 311 is designed to be arc-shaped, and the top inlet of the collection cavity 321 also has a corresponding concave arc transition. When the hinge block 311 scrapes along the pipe wall and pushes the detached scale particles into the opening area between the isolation frame 340 and the collection cavity 321, the scale is guided into the collection cavity 321 by the arc surface of the hinge block 311. After the scale enters the collection cavity 321, some of the subsequent tailwater will flow into the cavity. However, due to the continuous forward flow of the main current and the inward pressure of the water flow at the cavity opening, the scale in the collection cavity 321 is contained within the cavity. The scale particles are effectively contained and cannot overflow in the reverse direction; the water that enters the cavity is slowly discharged through the flow gap on the side or below the isolation frame 340, thus achieving scale separation; when the unblocking plate and the hinge block 311 continue to move down and fully enter the water passage 320 section, since the radial dimension of the water passage 320 is larger than the outer diameter of the unblocking assembly, a large annular gap is formed between the two, and the water mainly flows down smoothly from here. At this time, the bottom of the hinge block 311 contacts the preset limit block in the cavity, restricting its further downward movement, ensuring that the component remains stable in the non-working position, while maintaining unobstructed flow.

[0025] Working principle: The operator starts the booster pump 100 to pressurize the geothermal tailwater and then introduces it into the reinjection pipe 200. The high-pressure water flow pushes the unblocking block 310 and the hinged block 311 connected to it to slide down the pipe wall, thereby scraping off the scale particles attached to the inner wall of the pipe. When the hinged block 311 moves to the position of the telescopic block 333, it first pushes the telescopic block 333 down, driving the adjusting block 332 and the drive rod 331 down, until the adjusting block 332 is fixed to the pipe wall by magnetic attraction; this process The central drive rod 331 drives the isolation ring 330 to move downward, opening the opening between the upper part of the isolation frame 340 and the collection chamber 321. Then the hinge block 311 continues to move downward, and its inclined surface squeezes the telescopic block 333 into the adjusting block 332, allowing the hinge block 311 to pass through. At this time, the scraped particles have detached from the pipe wall and are located near the opening of the isolation frame 340. Under the influence of gravity and the lateral guidance at the edge of the hinge block 311, they fall directly into the collection chamber 321 through the opening, achieving immediate collection.

[0026] It should be noted that the pressure pump 100 mentioned above is a device with relatively mature existing technology. The specific model can be selected according to actual needs. At the same time, the pressure pump can be powered by the built-in power supply or by the mains power. The specific power supply method should be selected according to the situation, which will not be elaborated here.

[0027] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A geothermal tailwater reinjection anti-clogging filtration and pressurization device, characterized in that, include: A booster pump (100) and a reinjection pipe (200) are connected by a pipeline; The unblocking mechanism (300) includes an unblocking block (310) slidably disposed inside the return pipe (200). A water passage cavity (320) is provided on the inner wall of the return pipe (200) below the unblocking block (310). A collection cavity (321) is provided between the water passage cavity (320) and the unblocking block (310) in the return pipe (200).

2. The geothermal tailwater reinjection anti-clogging filtration and pressurization equipment according to claim 1, characterized in that, The inner wall of the recharge pipe (200) is fixedly connected to a fixing pipe, and the inner wall of the fixing pipe is slidably connected to a connecting rod (312). A spring is fixedly connected between the top end of the connecting rod (312) and the inner wall of the fixing pipe.

3. The geothermal tailwater reinjection anti-clogging filtration and pressurization equipment according to claim 2, characterized in that, The bottom end of the connecting rod (312) passes through the fixing tube and is fixedly connected to the top end of the unblocking block (310). Two hinge blocks (311) are hinged to the surface of the unblocking block (310). The two hinge blocks (311) are semi-circular and are arranged opposite to each other on the surface of the unblocking block (310). A torsion spring is provided between the unblocking block (310) and the hinge blocks (311).

4. The geothermal tailwater reinjection anti-clogging filtration and pressurization equipment according to claim 1, characterized in that, An isolation frame (340) is fixedly connected to the inner wall of the reinjection pipe (200), and the isolation frame (340) is correspondingly arranged with the collection chamber (321).

5. The geothermal tailwater reinjection anti-clogging filtration and pressurization equipment according to claim 4, characterized in that, An isolation ring (330) is provided above the isolation frame (340), and a plurality of drive rods (331) are fixedly connected to the top of the isolation ring (330). The isolation ring (330) is slidably disposed on the inner wall of the recharge pipe (200).

6. The geothermal tailwater reinjection anti-clogging filtration and pressurization equipment according to claim 5, characterized in that, An adjusting block (332) is fixedly connected to the surface of the drive rod (331). A telescopic block (333) is slidably connected to the inner wall of the adjusting block (332). Multiple springs are fixedly connected between the telescopic block (333) and the inner wall of the adjusting block (332). The cross-section of the telescopic block (333) is an isosceles trapezoid.

7. The geothermal tailwater reinjection anti-clogging filtration and pressurization equipment according to claim 6, characterized in that, The upper and lower ends of the regulating block (332) are each embedded with a magnetic block (334), and the inner wall of the recharge pipe (200) is embedded with a magnetic block (334) that cooperates with the regulating block (332).

8. The geothermal tailwater reinjection anti-clogging filtration and pressurization equipment according to claim 1, characterized in that, The reinjection pipe (200) is fixedly connected to two limiting blocks at the position of the water passage cavity (320), and the limiting blocks are set in the middle of the water passage cavity (320).

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