In-situ water absorption, thickening and separation circulating device and method for deep well filling slurry

Abstract

The present application belongs to the field of filling mining, and particularly relates to a deep well filling slurry in-situ water absorption thickening and separation circulating device and method. The device comprises a water absorption thickening system, a dry-wet resin separation rotation system and a saturated resin drying circulating system. The water absorption thickening system is arranged at the entrance of a stope, and is used for water absorption thickening of the delivered filling slurry. The dry-wet resin separation rotation system is used for replacement of water absorption resin particles in a chuck. The saturated resin drying circulating system is used for drying the replaced water absorption resin particles and sending them back to the dry-wet resin separation rotation system, and high-temperature waste water and high-temperature water vapor generated in the drying process are used for increasing the temperature of the filling slurry in an output pipeline. The present application is suitable for underground thickening technology of filling slurry, has small wear of conveying equipment (pump, pipeline), thickens into high-concentration slurry before the stope filling stage, has low water content and high cementing strength after entering a mined-out area, and can quickly form a stable support structure.

Description

Technical Field

[0001] This invention belongs to the field of backfilling mining, and particularly relates to a device and method for in-situ water absorption, thickening, separation and circulation of deep well backfilling slurry. Background Technology

[0002] Backfilling mining method achieves ground pressure control, surface protection and efficient resource recovery through backfilling of goaf, and is widely used in metal mines, coal mines and other fields. With the advancement of cementing materials and pipeline transportation technology, tailings cemented backfilling and paste backfilling have gradually become popular, significantly improving the strength of backfill and mining efficiency. The three requirements of slurry for "transport performance", "strength requirements" and "drainage ease" are contradictory in terms of concentration: (1) If good transport performance is pursued: low concentration slurry (good fluidity and low viscosity) is required, which can reduce the risk of pipeline blockage and reduce pumping pressure; (2) If high backfill strength is pursued: high concentration slurry is required, with a high proportion of solid particles, and the cementing materials and aggregates are more tightly bonded, resulting in higher strength after hardening; (3) If easy drainage is pursued: high concentration slurry is required, with low water content, and no long-term drainage is required after entering the goaf, which can shorten the curing cycle of the backfill. The three requirements for concentration are opposite, making it difficult for traditional slurry concentration design to simultaneously meet the requirements of "good transport, high strength and fast drainage".

[0003] However, existing technologies have bottlenecks. For example, ZL202510790000.4 proposes a high-concentration slurry manufacturing equipment. Its design logic is to reduce the amount of water transported afterward by "concentrating at the preparation end". However, it cannot solve the fundamental contradiction between concentration control at the preparation end and the transportation requirements. This mode is in essential conflict with the core requirement of "easy transportation" (low viscosity, high fluidity, low risk of pipe blockage, and low energy consumption). At the same time, it has disadvantages such as high risk of pipe blockage during transportation, high cost and energy consumption for long-distance transportation, and insufficient process flexibility. For example, ZL202311477595.5 proposes a method for preparing magnesium slag-based ultra-high water content filler material. It uses water-absorbing resin as an auxiliary means to increase the apparent concentration at the preparation end, that is, to improve the strength of the filler to a certain extent by locking water. However, the addition of water-absorbing resin technology cannot solve the defect of the material's function and transportation requirements. It does not solve the core pain point of "easy transportation" at all, but instead adds new transportation risks: resin agglomeration leads to a sharp drop in slurry fluidity and a sharp increase in transportation resistance; the water-locking function is contradictory to the transportation stability, and the concentration control is inaccurate; there is a contradiction between cost and large-scale transportation, and the economy is completely lacking; the environmental adaptability is poor, and the transportation risk is aggravated under special working conditions.

[0004] Whether it's high-concentration slurry manufacturing equipment or the addition of superabsorbent polymers, the core flaw stems from the static thickening technology logic at the preparation stage. This approach addresses the "concentration-strength" problem in a single step during slurry preparation, completely neglecting the dynamic demands for "flowability, stability, and economy" during transport. Neither technology overcomes the phased contradiction between thickening and transport: high-concentration slurry manufacturing equipment faces a concentration matching dilemma, while superabsorbent polymers introduce new "flowability-cost-strength" risks. Ultimately, this not only fails to solve the transport pain points but also generates new problems such as equipment wear and tear, soaring costs, and frequent pipe blockages. There is an urgent need to shift from centralized thickening at the front end to a segmented, dynamic control approach—that is, in-situ, near-site thickening downhole and coordinated matching of transport and filling concentrations—to truly balance the triple demands of "transportation-strength-drainage." Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an in-situ water absorption thickening and separation circulation device and method for deep well filling slurry. This invention is applicable to downhole thickening technology for filling slurry, and is particularly suitable for resolving the conflict between concentration requirements during the transportation and filling stages. During the transportation stage, the high fluidity of the low-concentration slurry can be utilized, resulting in less wear on transportation equipment (pumps, pipelines), reducing pipe blockage accidents, and lowering energy consumption and equipment costs for long-distance transportation. Before the filling stage in the stope, the slurry is thickened into a high-concentration slurry. After entering the goaf, it has low water content and high bonding strength, which can quickly form a stable support structure, while reducing drainage work and preventing water accumulation in the goaf from affecting subsequent mining.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A deep well filling slurry in-situ water absorption, thickening, separation, and circulation device includes a water absorption and thickening system, a dry-wet resin separation and rotation system, and a saturated resin drying and circulation system. The water absorption and thickening system is located at the stope entrance. One end of the system is equipped with a filling pipeline, and the other end with an output pipeline for absorbing and thickening the transported filling slurry. The system includes a clamping disc and a mixer. One end of the clamping disc is equipped with a filling pipeline, and the other end is equipped with a connecting pipeline I, which is connected to the mixer. The output end of the mixer is connected to the output pipeline. The clamping disc is embedded. A polymer material disc with multiple spherical traps allows the filling slurry to pass through, and water-absorbing resin particles are placed between the spherical traps. A dry and wet resin separation and replacement system is connected to the clamping disc to replace the water-absorbing resin particles in the clamping disc. The saturated resin drying and circulation system is located below the dry and wet resin separation and replacement system. The saturated resin drying and circulation system is used to dry the replaced water-absorbing resin particles and send them back to the dry and wet resin separation and replacement system. The high-temperature wastewater and high-temperature water vapor generated during the drying process are used to increase the temperature of the filling slurry in the output pipeline.

[0008] The clamping disc includes an upper clamping disc and a lower clamping disc. The upper and lower clamping discs are polymer material discs with multiple hemispherical traps embedded in them. The upper and lower clamping discs are magnetically fastened together. A sleeve I is fixedly connected to the top of the upper clamping disc, and a filling pipeline is provided on the sleeve I. The hemispherical traps are made of fiber to form a mesh-like hollow structure, and the gaps in the mesh are smaller than the diameter of the water-absorbing resin particles.

[0009] The water-absorbing and thickening system includes multiple layers of clamping discs arranged in parallel, with spherical traps on the multiple layers of clamping discs arranged in a staggered manner.

[0010] The filling pipeline is equipped with a pressure reducing valve or a buffer pool at the end of the filling pipeline, and a connecting pipeline II is provided below the buffer pool, with the connecting pipeline II located above the clamp.

[0011] A deep well filling slurry in-situ water absorption thickening and separation circulation device also includes a concentration sensing intelligent mixing system. The concentration sensing intelligent mixing system includes a concentration meter, a controller, and a central control console. The concentration meter is respectively arranged at the feed end of the filling pipeline and the connection between the output pipeline and the discharge port of the mixer, and is used to monitor the concentration change of the filling slurry in real time. The concentration information monitored by the concentration meter is transmitted to the central control console, which is used to send instructions to the controller. The controller is used to control the operation of the dry and wet resin separation and rotation system and the saturated resin drying and circulation system.

[0012] The dry and wet resin separation and rotation system includes a rotating shaft I, a screw feeder, and a dry material collection hopper. One end of the rotating shaft I is connected to the output shaft of the drive motor I, and the other end is fixedly connected to the clamping plate tilting frame via a connecting rod. The clamping plate tilting frame is connected to the upper clamping plate and the lower clamping plate. An electromagnetic clutch is provided between the rotating shaft I and the connecting rod. The rotating shaft I is used to adjust the position of the upper and lower clamping plates so that the upper and lower clamping plates are located at the thickening station, the wet recovery station, the dry material filling station, or the sealing station. The thickening station is located below the filling pipeline, the wet recovery station is located above the saturated resin drying circulation system, the dry material filling station is located in front of the screw feeder inlet, and the sealing station is located on the opposite side of the wet recovery station. The clamping plate tilting frame is rotatably connected to the upper clamping plate via a rotating shaft II. A drive motor II is fixedly connected to the clamping plate tilting frame, and the output shaft of the drive motor II is connected to the upper clamping plate via a rotating shaft II. A rotating shaft II is used to rotate the upper clamping plate 90 degrees. The clamping plate tilting frame is rotatably connected to the lower clamping plate via a rotating shaft III. A drive motor III is fixed on the tilting frame, and the output end of the drive motor III is connected to the rotating shaft III to rotate the lower clamping plate 180 degrees, allowing the water-absorbing resin particles between the upper and lower clamping plates to fall into the saturated resin drying circulation system. A screw feeder is located on one side of rotating shaft I and is used to provide water-absorbing resin particles to the clamping plates. A dry material collection hopper is provided on one side of the screw feeder, and the dry material collection hopper is connected to a dry material collection bin to collect the water-absorbing resin particles that fall during the screw feeder's feeding process. The dry material collection bin is connected to the screw feeder to provide water-absorbing resin particles to the screw feeder. The drive motor I, electromagnetic clutch, drive motor II, drive motor III, screw feeder, and controller are electrically connected.

[0013] The saturated resin drying circulation system includes a wet material recovery hopper, a drying box, and a drain trough. A vibrating feeder is installed on the wet material recovery hopper. The outlet of the wet material recovery hopper is connected to the drying box, and the outlet of the drying box is connected to the inlet of the dry material collection bin. The water / air outlet of the drying box is connected to the drain trough, which contains a water pump. The drain trough is connected to a sleeve, which is fitted over the outside of the output pipeline. High-temperature water vapor and wastewater generated during the drying process of the absorbent resin particles are discharged to the drain trough through the water / air outlet. The water pump in the drain trough pumps the high-temperature water vapor and wastewater into the sleeve to increase the temperature of the slurry in the output pipeline. The drying box, water pump, vibrating feeder, and controller are electrically connected.

[0014] The drying chamber is equipped with multiple layers of alternating inclined guide plates. The inclined guide plates are arranged vertically in a staggered manner, and the inclined directions of adjacent layers of inclined guide plates are opposite, so that the water-absorbing resin particles flow in a serpentine manner along the surface of the inclined guide plates, thereby increasing the drying time of the water-absorbing resin particles.

[0015] The wet material recovery hopper is equipped with a spray head for cleaning water-absorbing resin particles. A drain pipe is also connected to the bottom of the wet material recovery hopper, and the drain pipe is connected to a drain trough.

[0016] A method for in-situ water absorption thickening and separation circulation of deep well filling slurry, based on a device for in-situ water absorption thickening and separation circulation of deep well filling slurry, includes the following steps:

[0017] The multi-layered clamping plate, which is filled with water-absorbing resin particles, is located in the dense processing station, and the spherical traps of the multi-layered clamping plate are arranged in a staggered manner.

[0018] The filling slurry is transported through the filling pipeline to the multi-layer clamping plate located in the thickening station. The water-absorbing resin particles in the multi-layer clamping plate absorb the moisture of the filling slurry in a multi-layer gradient, thereby thickening the filling slurry. The thickened filling slurry enters the mixer for reactivation and stirring. The stirred filling slurry enters the output pipeline for filling in the mining area.

[0019] When the absorbent resin particles in the clamping discs are nearing saturation, drive motor I drives shaft I to rotate, adjusting the clamping discs to the wet recovery position. Drive motor II drives shaft II, rotating the upper clamping disc upwards by 90 degrees, while drive motor III drives shaft III, rotating the lower clamping disc by 180 degrees. The nearly saturated absorbent resin particles fall into the wet material recovery hopper under gravity. Shaft I then rotates, positioning the upper and lower clamping discs at the dry material filling position and driving the lower clamping disc to rotate 180 degrees. With the lower clamping plate at 0 degrees, the opening of the hemispherical trap faces upwards. The screw feeder throws dry water-absorbing resin particles into the lower clamping plate. The dry water-absorbing resin particles fall into the hemispherical trap in the lower clamping plate and accumulate naturally. Excess dry water-absorbing resin particles fall into the dry material collection hopper and are collected and recycled in the dry material collection bin. Adjust the upper and lower clamping plates to the sealing position, stop the screw feeder, rotate the upper clamping plate 90 degrees and magnetically engage it with the lower clamping plate, and adjust the clamping plates to the thickening position to carry out the next round of water absorption and thickening.

[0020] The controller controls the engagement and disengagement of the electromagnetic clutch, allowing the multi-layer chuck to sequentially enter the wet recycling station, the dry material filling station, and the sealing station.

[0021] Nearly saturated water-absorbing resin granules fall into the wet material recovery hopper under gravity. Spray nozzles clean the granules, and then a vibrating feeder releases them into a drying chamber. After thorough drying, the granules roll out of the chamber's outlet and into a dry material collection bin for storage, to be used for the next feeding of dry water-absorbing resin granules. The high-temperature steam and wastewater generated during the drying process are discharged into a drain trough. A pump then pumps these substances to the outer layer of the casing to increase the temperature of the slurry in the output pipeline.

[0022] Concentration meters installed at the feed inlet of the filling pipeline and at the connection between the output pipeline and the discharge outlet of the mixer are used to monitor the concentration changes of the slurry in real time. The concentration information monitored by the concentration meters is transmitted to the central control console, which is used to send instructions to the controller. The controller is used to realize the operation of drive motor I, drive motor II, drive motor III, screw feeder, drying box, water pump, mixer, vibrating feeder, and electromagnetic clutch.

[0023] The beneficial effects of this invention are as follows:

[0024] 1. This application includes a water-absorbing thickening system, which comprises a clamping pan and a mixer. The clamping pan contains water-absorbing resin particles, which are used to absorb and thicken the conveyed filling slurry. The thickened filling slurry is then activated and stirred by the mixer, resulting in a filling slurry with low water content and high bonding strength delivered to the mining area. This allows for the rapid formation of a stable support structure, reduces drainage workload, and prevents water accumulation in the goaf from affecting subsequent mining. Furthermore, the thickened filling slurry has high fluidity and causes minimal wear on pipelines. Additionally, this application includes a wet-dry resin separation and replacement system and a saturated resin drying and circulation system. The wet-dry resin separation and replacement system replaces the water-absorbing resin particles in the clamping pan, while the saturated resin drying and circulation system re-dries the replaced water-absorbing resin particles and returns them to the wet-dry resin separation and replacement system, forming a closed-loop process for thickening, drying, and replacing water-absorbing resin particles.

[0025] 2. The multiple hemispherical traps embedded in the upper and lower clamping plates of this application are made of a mesh-like hollow structure woven from fibers, and the gaps in the hollow structure are smaller than the diameter of the water-absorbing resin particles, ensuring that the filling slurry can pass smoothly through the hemispherical traps and come into contact with the water-absorbing resin particles.

[0026] 3. The water absorption and thickening system of this application can be equipped with multiple clamping discs, and the spherical traps between the clamping discs are staggered to achieve more uniform water absorption of the filling slurry and avoid the problem of incomplete thickening of the filling slurry.

[0027] 4. In the dry and wet resin separation and replacement system of this application, the rotating shaft I can adjust the position of the upper and lower clamping plates to replace the water-absorbing resin particles. At the same time, by connecting the rotating shaft I and the connecting rod connected to the clamping plates through an electromagnetic clutch, multiple clamping plates can be controlled separately to ensure the orderly replacement.

[0028] 5. The saturated resin drying circulation system of this application can dry the water-absorbing resin particles that are close to saturation and transport them back to the dry and wet resin separation and exchange system. At the same time, the high-temperature water vapor and high-temperature wastewater generated during drying can be used for heat preservation of the filling slurry in the output pipeline.

[0029] 6. This application is equipped with a concentration sensing intelligent mixing system, which can detect the concentration of the filling slurry, meet the density requirements of the filling slurry, control the operation of the dry and wet resin separation and rotation system and the saturated resin drying and circulation system, realize intelligent regulation, enhance system compatibility, and improve process stability and automation level.

[0030] 7. The equipment in this application has strong adaptability and can be integrated and assembled as needed to achieve nearby densification in the mine, reducing the drainage and maintenance cycle of the goaf and improving mining efficiency. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the deep well filling slurry in-situ water absorption thickening and separation circulation device of the present invention;

[0032] Figure 2 This is a schematic diagram of the structure of the clamping disc of the deep well filling slurry in-situ water absorption thickening and separation circulation device of the present invention. Figure 1 ;

[0033] Figure 3 This is a schematic diagram of the structure of the clamping disc of the deep well filling slurry in-situ water absorption thickening and separation circulation device of the present invention. Figure 2 ;

[0034] Figure 4 This is a schematic diagram of the structure of the clamping disc rotation of the deep well filling slurry in-situ water absorption thickening and separation circulation device of the present invention;

[0035] Figure 5 This is a schematic diagram of the multi-station conversion process of the dry and wet resin separation and rotation system of the deep well filling slurry in-situ water absorption thickening and separation circulation device of the present invention;

[0036] The system comprises: 1. Water absorption and thickening system; 101. Clamping plate; 1011. Upper clamping plate; 1012. Lower clamping plate; 1013. Hemispherical trap; 102. Mixer; 2. Dry and wet resin separation and rotation system; 201. Rotating shaft I; 202. Thickening station; 203. Wet recovery station; 204. Dry material filling station; 205. Sealing station; 206. Screw feeder; 207. Dry material collection hopper; 208. Dry material collection bin; 3. Saturated resin drying and circulation system; 301. Wet material recovery hopper; 302. Drying box; 3021. Inclined guide plate; 303. Drainage trough; 304. Spray head; 305. Drainage pipe; 306. Sleeve; 4. Concentration sensing intelligent mixing system; 401. Concentration meter; 402. Controller; 403. Main control panel; 5. Filling pipeline; 6. Output pipeline. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0038] like Figures 1-5 As shown, a deep well filling slurry in-situ water absorption thickening and separation circulation device includes a water absorption thickening system 1, a dry and wet resin separation and rotation system 2, and a saturated resin drying and circulation system 3. The water absorption thickening system 1 is arranged at the stope entrance. One end of the water absorption thickening system 1 is provided with a filling pipeline 5, and the other end is provided with an output pipeline 6, which is used to absorb and thicken the transported filling slurry. The water absorption thickening system 1 includes a clamp 101 and a mixer 102. One end of the clamp 101 is provided with a filling pipeline 5, and the other end is provided with a connecting pipeline I, which is connected to the mixer 102. The output end of the mixer 102 is connected to the output pipeline 6. The clamping plate 101 is a polymer material plate with multiple embedded spherical traps. The spherical traps can pass through the filling slurry, and water-absorbing resin particles are placed between the spherical traps. The dry and wet resin separation and replacement system 2 is connected to the clamping plate 101 and is used to replace the water-absorbing resin particles in the clamping plate 101. The saturated resin drying and circulation system 3 is located below the dry and wet resin separation and replacement system 2. The saturated resin drying and circulation system 3 is used to dry the replaced water-absorbing resin particles and send them back to the dry and wet resin separation and replacement system 2. The high-temperature wastewater and high-temperature water vapor generated during the drying process are used to increase the temperature of the filling slurry in the output pipeline 6.

[0039] In this embodiment, the diameter of the filling pipe 5 is 300mm~1000mm. The filling pipe 5, the connecting pipe I, and the clamp 101 are arranged perpendicularly. The distance between them needs to ensure that the clamp can rotate without collision and that the filling slurry does not spread. The filling slurry is transported to the clamp 101 through the filling pipe 5. The filling slurry can pass through the spherical trap of the clamp 101 and come into contact with the water-absorbing resin particles. The water-absorbing resin particles are pre-made spherical high-polymer hydrophilic materials with a large specific surface area, which can quickly absorb free water in the filling slurry, achieving a water-absorbing and thickening effect. After the filling slurry is water-absorbing and thickened, it enters the mixer 102 for reactivation and stirring to prevent... To prevent uneven distribution of water-absorbing slurry concentration in certain areas; when the water-absorbing resin particles are close to saturation, the dry and wet resin separation and replacement system 2 moves the clamp 101 to the corresponding position to replace the saturated water-absorbing resin particles. The replaced saturated water-absorbing resin particles enter the saturated resin drying circulation system 3 to dry the saturated water-absorbing resin particles and send them back to the dry and wet resin separation and replacement system 2. The high-temperature wastewater and high-temperature water vapor generated during the drying process are used to increase the temperature of the filling slurry in the output pipeline 6. The water-absorbing thickening system 1 of this invention is arranged at the entrance of the mining area and increases the concentration at the end of the conveying process, realizing the need for nearby thickening in the mine.

[0040] The clamping plate 101 includes an upper clamping plate 1011 and a lower clamping plate 1012. The upper clamping plate 1011 and the lower clamping plate 1012 are polymer material plates with multiple hemispherical traps 1013 embedded inside. The upper clamping plate 1011 and the lower clamping plate 1012 are magnetically fastened together. A sleeve I is fixedly connected to the top of the upper clamping plate 1011. The sleeve I is provided with a filling pipe 5. The hemispherical traps 1013 are made of fiber to form a mesh hollow structure. The gaps in the mesh are smaller than the diameter of the water-absorbing resin particles.

[0041] In this embodiment, the upper clamping plate 1011 and the lower clamping plate 1012 are positioned by magnetic snap-fit. The top of the lower clamping plate 1012 is fixedly connected to the sleeve II, which is fastened to the upper clamping plate 1011 to form a closed area to prevent slurry from splashing. The hemispherical trap 1013 is made of woven fiber, allowing the filling slurry to pass through smoothly. The gap of the hemispherical trap 1013 is smaller than the diameter of the water-absorbing resin, ensuring that the hemispherical trap 1013 can hold the resin particles and prevent the resin particles from mixing into the filling slurry. The gap of the hemispherical trap 1013 is 20 mesh, and the size of the water-absorbing resin particles is 2 to 16 mesh.

[0042] The water-absorbing and thickening system 1 includes multiple layers of clamping discs 101, which are arranged in parallel, and the spherical traps of the multiple layers of clamping discs 101 are arranged in a staggered manner.

[0043] In this embodiment, the water-absorbing thickening system 1 can be configured with multiple layers of clamping discs 101 as needed for tiered water absorption. The filling slurry is continuously and uninterruptedly conveyed. The tiered water absorption and thickening process allows the slurry to be fully dehydrated and its concentration increased during flow. The spherical traps between the multiple clamping discs 101 are staggered to slow down the flow rate of the slurry and further improve the water absorption effect. The staggered arrangement also makes the water absorption more uniform and avoids the situation where the water-absorbing resin particles cover blind areas without water absorption.

[0044] The filling pipeline 5 is equipped with a pressure reducing valve or a buffer pool at the end of the filling pipeline 5. A connecting pipeline II is provided below the buffer pool, and the connecting pipeline II is located above the sleeve I of the upper clamping plate.

[0045] In this embodiment, if the incoming water pressure in the filling pipeline 5 is too high, a pressure reducing valve or a buffer tank is added to the end of the filling pipeline 5 to relieve pressure and prevent the filling slurry from excessively impacting the clamping plate and affecting its service life.

[0046] A deep well filling slurry in-situ water absorption thickening and separation circulation device further includes a concentration sensing intelligent mixing system 4. The concentration sensing intelligent mixing system 4 includes a concentration meter 401, a controller 402, and a central control console 403. The concentration meter 401 is respectively arranged at the feed end of the filling pipeline 5 and the connection point of the output pipeline 6 with the discharge port of the mixer 102, and is used to monitor the concentration change of the filling slurry in real time. The concentration information monitored by the concentration meter 401 is transmitted to the central control console 403. The central control console 403 is used to send instructions to the controller 402. The controller 402 is used to control the operation of the dry and wet resin separation and rotation system 2, the saturated resin drying and circulation system 3, and the pressure reducing valve.

[0047] In this embodiment, the main control console 403 configures the number of layers of the clamping disc 101 of the water-absorbing and thickening system 1 and the cycle of the dry and wet resin separation and rotation system 2 based on the concentration change of the slurry monitored by the concentration meter 401, i.e. the water absorption and thickening effect. The controller 402 controls the drive motor I, drive motor II, screw feeder 206, drying box 302, water pump, mixer 102, vibrating feeder, etc. to achieve intelligent adjustment based on concentration sensing.

[0048] The dry and wet resin separation and rotation system 2 includes a rotating shaft I 201, a screw feeder 206, and a dry material collection hopper 207. One end of the rotating shaft I 201 is connected to the output shaft of the drive motor I, and the other end is fixedly connected to the clamping plate tilting frame via a connecting rod. The clamping plate tilting frame is connected to the upper clamping plate and the lower clamping plate. An electromagnetic clutch is provided between the rotating shaft I 201 and the connecting rod. The rotating shaft I 201 is used to adjust the position of the upper clamping plate 1011 and the lower clamping plate 1012, so that the upper clamping plate 1011 and the lower clamping plate 1012 are in the dense resin position. Station 202, wet recovery station 203, dry material filling station 204, or sealing station 205 are all located at different points. Station 202 is located below the filling pipeline 5. Station 203 is located above the saturated resin drying circulation system 3. Station 204 is located in front of the feed inlet of the screw conveyor 206. Station 205 is located on the opposite side of station 203. The chuck tilting frame and the upper chuck 1011 are rotatably connected via a rotating shaft II. A drive motor II is fixedly connected to the chuck tilting frame. The output shaft of shaft II is connected to rotating shaft II, used to rotate the upper clamping plate 1011 90 degrees. The clamping plate flipping frame and the lower clamping plate 1012 are rotatably connected via rotating shaft III. A drive motor III is fixed on the clamping plate flipping frame, and the output end of the drive motor III is connected to rotating shaft III, used to rotate the lower clamping plate 1012 180 degrees, so that the water-absorbing resin particles between the upper clamping plate 1011 and the lower clamping plate 1012 fall into the saturated resin drying circulation system 3; the screw feeder 206 is located on one side of rotating shaft I 201, used to feed... The clamping plate 101 provides water-absorbing resin particles. A dry material collection hopper 207 is provided on one side of the screw feeder 206. The dry material collection hopper 207 is connected to the dry material collection bin 208 and is used to collect the water-absorbing resin particles that fall during the feeding process of the screw feeder 206. The dry material collection bin 208 is connected to the screw feeder 206 and is used to provide water-absorbing resin particles to the screw feeder 206. The drive motor I, electromagnetic clutch, drive motor II, drive motor III, screw feeder 206 and controller 402 are electrically connected.

[0049] In this embodiment, the rotating shaft I 201 can independently control the rotation of the multi-layer clamping plates 101. The clamping plates 101 are divided into a thickening station 202, a wet recovery station 203, a dry material filling station 204, and a sealing station 205 based on their location and function. Each connecting rod is connected to the rotating shaft I 201 via an electromagnetic clutch. The driving end of the electromagnetic clutch is fixedly connected to the rotating shaft I 201, and the driven end is fixedly connected to the connecting rod. The controller 402 independently controls the on / off state of each electromagnetic clutch, enabling independent rotation of multiple clamping plates.

[0050] Rotating shaft II is a horizontal rotating shaft set perpendicular to the connecting rod. The output shaft of drive motor II is connected to the horizontal rotating shaft to drive the horizontal rotating shaft to rotate, thereby rotating the upper clamping plate 1011 upward by 90 degrees. Rotating shaft III is a vertical rotating shaft set parallel to the connecting rod. The vertical rotating shaft is fixedly connected to the lower clamping plate and rotatably connected to the clamping plate flipping frame. The output shaft of drive motor III is connected to the vertical rotating shaft, thereby driving the vertical rotating shaft to rotate, thereby rotating the lower clamping plate by 180 degrees.

[0051] In this embodiment, a suitable cycle period is determined based on the time-varying water absorption model of the water-absorbing resin particles obtained in the laboratory. During one cycle, when clamp 101 is in the thickening station 202, the water-absorbing resin particles in the spherical trap fully absorb water to achieve a thickening effect in the slurry. When the water-absorbing resin particles are close to saturation, the rotating shaft I 201 rotates 90 degrees, causing the upper clamp 1011 and lower clamp 1012 to enter the wet recovery station 203. The drive motor II drives the rotating shaft II, causing the upper clamp 1011 to rotate 90 degrees and lift the upper clamp 1011, opening the hemispherical trap 1013 while providing space for the lower clamp 1012 to flip. Then, the drive motor III drives the rotating shaft III, causing the lower clamp 1012 to flip 180 degrees. The water-absorbing resin particles that are close to saturation fall from the spherical trap into the wet material recovery hopper 301 below for collection and recovery under the action of gravity. Then, the rotating shaft I 201 rotates 90 degrees, causing the upper clamp 1011 and lower clamp 1012 to enter the dry material filling stage. At station 204, the lower clamping plate 1012 is flipped and reset, so that the opening of the hemispherical trap 1013 of the lower clamping plate 1012 faces upward to collect dry absorbent resin particles. Then, when the dry absorbent resin particles scattered from the discharge port of the screw feeder 206 pass through the lower clamping plate 1012, they automatically fall into the hemispherical trap 1013 and accumulate naturally. The excess dry absorbent resin particles fall into the dry material collection hopper 207 below for collection and recycling. When the dry absorbent resin particles are replenished, the rotating shaft I 201 rotates 90 degrees to make the upper clamping plate 1011 and the lower clamping plate 1012 enter the sealing station 205. The screw feeder 206 stops working and rotates the upper clamping plate 1011 90 degrees to automatically magnetically position and seal it with the lower clamping plate 1012. Finally, the rotating shaft I rotates 90 degrees to make the upper clamping plate 1011 and the lower clamping plate 1012 re-enter the thickening station 202 and start the next cycle.

[0052] As an alternative, the rotating shaft I201 can also be connected to the upper clamping plate 1011 and the lower clamping plate 1012 respectively via connecting rods. A rotating shaft IV is provided between the upper clamping plate 1011 and the connecting rod. A drive motor IV is fixed on the connecting rod. The output end of the drive motor IV is connected to the rotating shaft IV, so that the upper clamping plate 1011 can rotate upward by 90 degrees. A rotating shaft V is provided between the lower clamping plate 1012 and the connecting rod. A drive motor V is fixed on the connecting rod. The output end of the drive motor V is connected to the rotating shaft V, so that the lower clamping plate can rotate by 180 degrees. The drive motors IV and V are electrically connected to the controller.

[0053] When using multi-layer clamping plates 101, they should be queued up as needed to enter the wet recycling station 203, dry material filling station 204, and sealing station 205. Only one layer of clamping plates 101 can be arranged to enter at the same time to avoid mutual interference in spatial position.

[0054] The saturated resin drying circulation system 3 includes a wet material recovery hopper 301, a drying box 302, and a draining trough 303. The wet material recovery hopper 301 is equipped with a vibrating feeder. The outlet of the wet material recovery hopper 301 is connected to the drying box 302. The outlet of the drying box 302 is connected to the inlet of the dry material collection bin 208. The water / air outlet of the drying box 302 is connected to the draining trough 303. A water pump is installed in the draining trough 303. The draining trough 303 is connected to a sleeve 306, which is sleeved on the outside of the output pipeline 6. The high-temperature water vapor and high-temperature wastewater generated during the drying process of the water-absorbing resin particles are discharged to the draining trough 303 through the water / air outlet. The water pump in the draining trough 303 pumps the high-temperature water vapor and high-temperature wastewater into the sleeve 306 to increase the temperature of the slurry in the output pipeline 6. The drying box 302, the water pump, the vibrating feeder, and the controller 402 are electrically connected.

[0055] In this embodiment, the nearly saturated water-absorbing resin particles are collected and recovered by the wet material recovery hopper 301, and then released by the inertial vibrating feeder with a vibrating motor as the excitation source below the wet material recovery hopper 301 into the feed inlet of the drying chamber 302. After the water-absorbing resin particles are fully dried in the drying chamber 302, they automatically roll out from the discharge port of the drying chamber 302 and enter the dry material collection bin 208. They are then lifted to a high discharge port by the screw feeder 206 as supplementary material and thrown out, re-entering the clamping plate 101 to participate in the cycle.

[0056] In this embodiment, a large amount of high-temperature wastewater and high-temperature water vapor generated by the drying box 302 are introduced into the casing 306 to serve as an insulation layer to increase the temperature of the slurry, thereby reducing the yield stress of the slurry and facilitating its transport. After entering the mining area, the slurry can be kept warm for a period of time to increase the curing temperature and further improve the strength of the filling body.

[0057] The drying oven 302 is provided with multiple layers of alternating inclined guide plates 3021. The inclined guide plates 3021 are arranged vertically in an alternating manner, and the inclined directions of adjacent layers of inclined guide plates 3021 are opposite, so that the water-absorbing resin particles flow in a serpentine manner along the surface of the inclined guide plates 3021 to increase the drying time of the water-absorbing resin particles.

[0058] In this embodiment, the multi-layered alternating inclined guide plates 3021 facilitate the rolling of the water-absorbing resin particles under the action of gravity, while extending the drying time of the wet resin; the drying box 302 can also be equipped with a variable speed conveyor such as a belt conveyor to achieve full drying of the water-absorbing resin particles.

[0059] The wet material recycling hopper 301 is equipped with a spray head 304 for cleaning water-absorbing resin particles. A drain pipe 305 is also connected to the bottom of the wet material recycling hopper 301, and the drain pipe 305 is connected to the drain trough 303.

[0060] In this embodiment, the wet material recovery hopper 301 should be equipped with a spray head 304 for continuous spraying and cleaning of the water-absorbing resin, so as to ensure that the surface of the water-absorbing resin is smooth after drying and still has water absorption capacity; the wastewater after being cleaned by the spray head 304 is discharged into the drainage tank 303 for sedimentation and filtration through the drain pipe 305.

[0061] A method for in-situ water absorption thickening and separation circulation of deep well filling slurry includes the following steps:

[0062] The multi-layer clamping plate 101, which is filled with water-absorbing resin particles, is located in the dense processing station 202, and the spherical traps of the multi-layer clamping plate 101 are staggered.

[0063] The filling slurry is transported through the filling pipeline 5 to the multi-layer clamping plate 101 located at the thickening station 202. The water-absorbing resin particles in the multi-layer clamping plate 101 absorb the moisture of the filling slurry in a multi-layer gradient, thereby thickening the filling slurry. The thickened filling slurry enters the mixer 102 for reactivation and stirring. The stirred filling slurry enters the output pipeline 6 for filling in the mining area.

[0064] When the absorbent resin particles in clamping disc 101 are close to saturation, drive motor I drives rotating shaft I 201 to rotate, and clamping disc 101 is adjusted to the wet recovery station 203. Drive motor II drives rotating shaft II to rotate the upper clamping disc 1011 upwards by 90 degrees, opening the hemispherical trap 1013 of the upper clamping disc 1011 and providing space for the lower clamping disc 1012 to flip. Drive motor III drives rotating shaft III to rotate the lower clamping disc 1012 by 180 degrees. The absorbent resin particles that are close to saturation fall into the wet material recovery hopper 301 under the action of gravity. Rotating shaft I 201 rotates, positioning the upper clamping disc 1011 and the lower clamping disc 1012 at the dry material filling station 204, and drives the lower clamping disc 1011 to rotate. 2. Rotate 180 degrees so that the opening of the hemispherical trap 1013 of the lower clamping plate 1012 faces upward to collect dry water-absorbing resin particles. The screw feeder 206 throws the dry water-absorbing resin particles into the lower clamping plate 1012. The dry water-absorbing resin particles fall into the hemispherical trap 1013 of the lower clamping plate 1012 and accumulate naturally. The excess dry water-absorbing resin particles fall into the dry material collection hopper 207 below and fall into the dry material collection bin 208 for collection and recovery. Adjust the upper clamping plate 1011 and the lower clamping plate 1012 to the sealing position 205, stop the screw feeder 206, rotate the upper clamping plate 1011 90 degrees to magnetically engage with the lower clamping plate 1012, and adjust the clamping plate 101 to the thickening position 202 to carry out the next round of water absorption and thickening.

[0065] The controller 402 controls the engagement and disengagement of the electromagnetic clutch, causing the multi-layer chuck 101 to sequentially enter the wet recycling station 203, the dry material filling station 204, and the sealing station 205.

[0066] Nearly saturated water-absorbing resin particles fall into the wet material recovery hopper 301 under gravity. Spray heads 304 clean the water-absorbing resin particles by spraying them. Then, the vibrating feeder releases the water-absorbing resin particles from the wet material recovery hopper 301 into the drying chamber 302. After being fully dried in the drying chamber 302, the water-absorbing resin particles roll out from the discharge port of the drying chamber 302 and enter the dry material collection bin 208 for storage, for the next feeding and conveying of dry water-absorbing resin particles. The high-temperature water vapor and high-temperature wastewater generated during the full drying process of the water-absorbing resin particles in the drying chamber 302 are discharged to the drain trough 303. Under the action of the water pump, the high-temperature water vapor and high-temperature wastewater are then pumped to the outer layer of the sleeve 306 to increase the temperature of the slurry in the output pipeline.

[0067] A concentration meter 401, located at the connection point between the feed end of the filling pipeline 5 and the discharge port of the output pipeline 6 and the mixer 102, is used to monitor the concentration change of the slurry in real time. The concentration information monitored by the concentration meter 401 is transmitted to the central control console 403. The central control console 403 is used to send instructions to the controller 402. The controller 402 is used to realize the actions of drive motor I, drive motor II, drive motor III, screw feeder 206, drying box 302, water pump, mixer 102, vibrating feeder, electromagnetic clutch, etc.

Claims

1. A device for in-situ water absorption, thickening, separation, and circulation of deep well filling slurry, characterized in that, The system includes a water-absorbing thickening system, a wet-dry resin separation and rotation system, and a saturated resin drying and circulation system. The water-absorbing thickening system is located at the stope entrance. One end of the system has a filling pipe, and the other end has an output pipe. It is used to absorb and thicken the conveyed filling slurry. The water-absorbing thickening system includes a clamping plate and a mixer. One end of the clamping plate has a filling pipe, and the other end has a connecting pipe I, which is connected to the mixer. The output end of the mixer is connected to the output pipe. The clamping plate is a polymer material plate with multiple embedded spherical traps. The spherical traps can pass through the filling slurry, and water-absorbing resin particles are placed between the spherical traps. The wet-dry resin separation and rotation system is connected to the clamping plate and is used to replace the water-absorbing resin particles in the clamping plate. The saturated resin drying and circulation system is located below the wet-dry resin separation and rotation system. The saturated resin drying and circulation system is used to dry the replaced water-absorbing resin particles and send them back to the wet-dry resin separation and rotation system. The high-temperature wastewater and high-temperature steam generated during the drying process are used to increase the temperature of the filling slurry in the output pipe. The dry and wet resin separation and rotation system includes a rotating shaft I, a screw feeder, and a dry material collection hopper. One end of the rotating shaft I is connected to the output shaft of the drive motor I, and the other end is fixedly connected to the clamping plate tilting frame via a connecting rod. The clamping plate tilting frame is connected to the upper clamping plate and the lower clamping plate. An electromagnetic clutch is provided between the rotating shaft I and the connecting rod. The rotating shaft I is used to adjust the position of the upper clamping plate and the lower clamping plate so that the upper clamping plate and the lower clamping plate are located at the thickening station, the wet recovery station, the dry material filling station, or the sealing station. The thickening station is located below the filling pipeline, the wet recovery station is located above the saturated resin drying circulation system, the dry material filling station is located in front of the screw feeder inlet, and the sealing station is located on the opposite side of the wet recovery station.

2. The in-situ water absorption, thickening, separation, and circulation device for deep well filling slurry according to claim 1, characterized in that, The clamping disc includes an upper clamping disc and a lower clamping disc. The upper and lower clamping discs are polymer material discs with multiple hemispherical traps embedded in them. The upper and lower clamping discs are magnetically fastened together. A sleeve I is fixedly connected to the top of the upper clamping disc, and a filling pipeline is provided on the sleeve I. The hemispherical traps are made of fiber to form a mesh-like hollow structure, and the gaps in the mesh are smaller than the diameter of the water-absorbing resin particles.

3. The in-situ water absorption, thickening, separation, and circulation device for deep well filling slurry according to claim 1, characterized in that, The water-absorbing and thickening system includes multiple layers of clamping discs arranged in parallel, with spherical traps on the multiple layers of clamping discs arranged in a staggered manner.

4. The in-situ water absorption, thickening, separation, and circulation device for deep well filling slurry according to claim 1, characterized in that, The filling pipeline is equipped with a pressure reducing valve or a buffer pool at the end of the filling pipeline, and a connecting pipeline II is provided below the buffer pool, with the connecting pipeline II located above the clamp.

5. The in-situ water absorption, thickening, separation, and circulation device for deep well filling slurry according to claim 1, characterized in that, It also includes a concentration-sensing intelligent mixing system, which includes a concentration meter, a controller, and a central control console. The concentration meter is located at the feed end of the filling pipeline and at the connection point between the output pipeline and the mixer outlet, respectively, to monitor the concentration change of the filling slurry in real time. The concentration information monitored by the concentration meter is transmitted to the central control console, which is used to send instructions to the controller. The controller is used to control the operation of the dry and wet resin separation and rotation system and the saturated resin drying and circulation system.

6. The in-situ water absorption, thickening, separation, and circulation device for deep well filling slurry according to claim 5, characterized in that, The chuck tilting frame is rotatably connected to the upper chuck via rotating shaft II. A drive motor II is fixedly connected to the chuck tilting frame, and the output shaft of drive motor II is connected to rotating shaft II to achieve a 90-degree rotation of the upper chuck. The chuck tilting frame is rotatably connected to the lower chuck via rotating shaft III. A drive motor III is fixed to the chuck tilting frame, and the output end of drive motor III is connected to rotating shaft III to achieve a 180-degree rotation of the lower chuck, allowing the absorbent resin particles between the upper and lower chucks to fall into the saturated resin drying circulation system. The screw feeder is located on one side of rotating shaft I and provides absorbent resin particles to the chucks. A dry material collection hopper is located on one side of the screw feeder and is connected to a dry material collection bin to collect absorbent resin particles that fall during the screw feeder's feeding process. The dry material collection bin is connected to the screw feeder to provide absorbent resin particles to the screw feeder. Drive motor I, the electromagnetic clutch, drive motor II, drive motor III, the screw feeder, and the controller are electrically connected.

7. The in-situ water absorption, thickening, separation, and circulation device for deep well filling slurry according to claim 5, characterized in that, The saturated resin drying circulation system includes a wet material recovery hopper, a drying box, and a drain trough. A vibrating feeder is installed on the wet material recovery hopper. The outlet of the wet material recovery hopper is connected to the drying box, and the outlet of the drying box is connected to the inlet of the dry material collection bin. The water / air outlet of the drying box is connected to the drain trough, which contains a water pump. The drain trough is connected to a sleeve, which is fitted over the outside of the output pipeline. High-temperature water vapor and wastewater generated during the drying process of the absorbent resin particles are discharged to the drain trough through the water / air outlet. The water pump in the drain trough pumps the high-temperature water vapor and wastewater into the sleeve to increase the temperature of the slurry in the output pipeline. The drying box, water pump, vibrating feeder, and controller are electrically connected.

8. The in-situ water absorption, thickening, separation, and circulation device for deep well filling slurry according to claim 7, characterized in that, The drying chamber is equipped with multiple layers of alternating inclined guide plates. The inclined guide plates are arranged vertically in a staggered manner, and the inclined directions of adjacent layers of inclined guide plates are opposite, so that the water-absorbing resin particles flow in a serpentine manner along the surface of the inclined guide plates, thereby increasing the drying time of the water-absorbing resin particles.

9. The in-situ water absorption, thickening, separation, and circulation device for deep well filling slurry according to claim 7, characterized in that, The wet material recovery hopper is equipped with a spray head for cleaning water-absorbing resin particles. A drain pipe is also connected to the bottom of the wet material recovery hopper, and the drain pipe is connected to a drain trough.

10. A method for in-situ water absorption, thickening, separation, and circulation of deep well filling slurry, based on the in-situ water absorption, thickening, separation, and circulation device for deep well filling slurry as described in claim 1, characterized in that, Includes the following steps: The multi-layered clamping plate, which is filled with water-absorbing resin particles, is located in the dense processing station, and the spherical traps of the multi-layered clamping plate are arranged in a staggered manner. The filling slurry is transported through the filling pipeline to the multi-layer clamping plate located in the thickening station. The water-absorbing resin particles in the multi-layer clamping plate absorb the moisture of the filling slurry in a multi-layer gradient, thereby thickening the filling slurry. The thickened filling slurry enters the mixer for reactivation and stirring. The stirred filling slurry enters the output pipeline for filling in the mining area. When the absorbent resin particles in the clamping discs are nearing saturation, drive motor I drives shaft I to rotate, adjusting the clamping discs to the wet recovery position. Drive motor II drives shaft II, rotating the upper clamping disc upwards by 90 degrees, while drive motor III drives shaft III, rotating the lower clamping disc by 180 degrees. The nearly saturated absorbent resin particles fall into the wet material recovery hopper under gravity. Shaft I then rotates, positioning the upper and lower clamping discs at the dry material filling position and driving the lower clamping disc to rotate 180 degrees. With the lower clamping plate at 0 degrees, the opening of the hemispherical trap faces upwards. The screw feeder throws dry water-absorbing resin particles into the lower clamping plate. The dry water-absorbing resin particles fall into the hemispherical trap in the lower clamping plate and accumulate naturally. Excess dry water-absorbing resin particles fall into the dry material collection hopper and are collected and recycled in the dry material collection bin. Adjust the upper and lower clamping plates to the sealing position, stop the screw feeder, rotate the upper clamping plate 90 degrees and magnetically engage it with the lower clamping plate, and adjust the clamping plates to the thickening position to carry out the next round of water absorption and thickening. The controller controls the engagement and disengagement of the electromagnetic clutch, allowing the multi-layer chuck to sequentially enter the wet recycling station, the dry material filling station, and the sealing station. Nearly saturated water-absorbing resin granules fall into the wet material recovery hopper under gravity. Spray nozzles clean the granules, and then a vibrating feeder releases them into a drying chamber. After thorough drying, the granules roll out of the chamber's outlet and into a dry material collection bin for storage, to be used for the next feeding of dry water-absorbing resin granules. The high-temperature steam and wastewater generated during the drying process are discharged into a drain trough. A pump then pumps these substances to the outer layer of the casing to increase the temperature of the slurry in the output pipeline. Concentration meters installed at the feed inlet of the filling pipeline and at the connection between the output pipeline and the discharge outlet of the mixer are used to monitor the concentration changes of the slurry in real time. The concentration information monitored by the concentration meters is transmitted to the central control console, which is used to send instructions to the controller. The controller is used to realize the operation of drive motor I, drive motor II, drive motor III, screw feeder, drying box, water pump, mixer, vibrating feeder, and electromagnetic clutch.

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