Waste water recovery device for calcium carbonate production

Abstract

The invention provides a wastewater recovery device for calcium carbonate production, and belongs to the technical field of calcium carbonate production wastewater recovery. A plurality of feeding barrels are arranged on the upper side of the discharging barrel; each charging barrel is communicated with the discharging barrel and is connected with a valve body part for adjusting the communication state of the charging barrel and the discharging barrel; the drain pipe is arranged in the blanking barrel, and the lower end extends out of the blanking barrel; a plurality of trays are arranged on the drainage pipe, and a water through hole communicated with the drainage pipe is formed in the upper side of each tray, so that liquid components in the mixture on the trays enter the drainage pipe; the multiple material guiding assemblies are arranged in the discharging barrel and correspond to the multiple trays in a one-to-one mode. Compared with the prior art, the wastewater recovery device for calcium carbonate production provided by the invention has the advantages that no stirring paddle design is adopted, so that secondary pollution to purified water after a filter material is crushed is avoided.

Description

Technical Field

[0001] This invention belongs to the field of wastewater recovery technology in calcium carbonate production, and more specifically, relates to a wastewater recovery device for calcium carbonate production. Background Technology

[0002] The production of calcium carbonate generates a large amount of wastewater, primarily filter press wastewater. Filter press wastewater contains calcium and magnesium ions, is alkaline, and contains a large amount of residual treatment agents. Direct discharge of this wastewater not only pollutes the environment but also causes serious waste of water resources. Therefore, the wastewater must be treated before discharge or recycled.

[0003] Currently, calcium carbonate manufacturers mostly use coal slag to purify wastewater. Specifically, they utilize the acidic sulfides and amphoteric alumina in the coal slag, as well as its porosity and adsorption properties, to chemically treat and physically adsorb the wastewater. To ensure the effectiveness and efficiency of wastewater treatment, after the coal slag is discharged into the wastewater, a stirring shaft is usually used to agitate the mixture of coal slag and wastewater to ensure thorough mixing.

[0004] The inventors discovered that under the influence of the shear force provided by the stirring shaft, coal slag is easily crushed into fine particles by colliding with the inner wall of the equipment or the stirring shaft. Since the fine particles are difficult to be intercepted by the filter screen, they will eventually be discharged with the purified water, resulting in a reduction in the wastewater purification effect. The discharged water needs to be separated from the fine particles by sedimentation, which takes a lot of time and greatly reduces the wastewater purification efficiency. Summary of the Invention

[0005] The purpose of this application is to provide a wastewater recovery device for calcium carbonate production, in order to solve the technical problem in the prior art that when calcium carbonate production wastewater is purified by coal slag, the coal slag is broken into fine particles due to stirring and shearing force, which are difficult to be intercepted by the filter screen, resulting in reduced purification effect and time-consuming sedimentation separation, ultimately causing low purification efficiency.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: A wastewater recovery device for calcium carbonate production is provided, comprising: The feed cylinder has multiple feed cylinders spaced apart along its circumference on its upper side; each feed cylinder is connected to the feed cylinder and is connected to a valve body for adjusting its communication state with the feed cylinder; A drain pipe is coaxially disposed inside the feed cylinder, with its lower end extending outside the feed cylinder; the drain pipe has multiple trays spaced apart along the axial direction, each tray having a water passage hole on its upper side communicating with the drain pipe, so that liquid components in the mixture on the tray can enter the drain pipe; and Multiple material guiding components are spaced apart in the feed cylinder along the vertical direction and correspond one-to-one with multiple trays; each material guiding component is used to receive the mixture discharged from the feed cylinder, or to avoid the falling trajectory of the mixture, and is also used to discharge the mixture falling on it to the corresponding tray. Each of the feeding cylinders is adapted to rotate about its central axis to mix the material inside the feeding cylinder; the drain pipe is driven by a rotation drive component and a speed transmission structure, the speed transmission structure being driven by each of the feeding cylinders to drive the multiple feeding cylinders to rotate synchronously.

[0007] In one possible implementation, the upper end face of the feed cylinder has multiple feed ports that correspond one-to-one with the multiple feed cylinders; the guiding assembly includes: A mounting ring is fitted around the outer periphery of the corresponding tray, and the outer peripheral surface of the mounting ring is in contact with the inner peripheral surface of the feed cylinder; a ring-shaped reserved space is provided between the inner edge of the mounting ring and the outer edge of the tray, allowing the mixture falling from the feed inlet to pass through the reserved space; and Multiple guide plates are spaced apart on the mounting ring along its circumference, and each guide plate corresponds to one of the multiple feed ports; each guide plate is slidably connected to the mounting ring and is driven by a linear drive component. Each of the guide plates is used to move into the reserved space to receive the mixture discharged from the corresponding feed port and guide the mixture onto the corresponding tray.

[0008] In one possible implementation, the inner diameter of the mounting ring gradually increases from top to bottom; the guide plate is slidably connected to the inner side of the mounting ring so that its surface is inclined; the linear drive component includes: A transmission seat is disposed on the guide plate, and the transmission seat has a threaded hole extending along the sliding direction of the guide plate; and A drive screw is rotatably mounted on the mounting ring and threadedly connected to the threaded hole; the drive screw is driven by a first rotary motor for driving its rotation.

[0009] In one possible implementation, the upper side of the tray has a recessed structure to form a maximum capacity value for accommodating the mixture; Each of the mounting rings is equipped with a vision sensor; the vision sensor is oriented toward the corresponding tray to monitor the total amount of mixture on the tray, and outputs a control signal when the total amount is equal to or greater than the maximum capacity value; The signal output module of the vision sensor is electrically connected to the control module of each of the linear drive components on the mounting ring, so that the vision sensor can simultaneously output the control signal to multiple linear drive components to control multiple guide plates to move simultaneously outside the reserved space.

[0010] In one possible implementation, the water passage includes: Multiple sets of filter holes are spaced apart circumferentially along the drain pipe, and each set of filter holes includes multiple filter holes spaced apart axially along the drain pipe.

[0011] In one possible implementation, the tray has a material discharge port that extends vertically and a blocking plate disposed on its underside. The blocking plate is slidably connected to the drain pipe in the vertical direction, and the drain pipe has a lifting drive component that is pulsatorically connected to each of the blocking plates; The lifting drive component can drive multiple blocking plates to lift and lower synchronously, so that the blocking plates move to abut against the lower side of the tray and close the discharge port; or move the blocking plates to separate from the lower side of the tray and open the discharge port.

[0012] In one possible implementation, the bottom of the feed cylinder has an installation hole suitable for the drainage pipe to pass through, and a sealing sleeve is fitted onto the drainage pipe to fill the space between the drainage pipe and the installation hole; the sealing sleeve has a through hole extending in the vertical direction; the lifting drive component includes: A connecting rod is disposed inside the feed cylinder; the connecting rod is connected to each of the blocking plates and is also slidably connected to each of the trays in the vertical direction; furthermore, the lower end of the connecting rod extends through the through hole, and the extended portion of the connecting rod has an external thread structure; and An adjustment knob is rotatably mounted on the sealing bushing, and the adjustment knob has a through hole extending along its rotation axis. The inner wall of the through hole has an internal thread structure so that the adjustment knob is threadedly connected to the protruding part of the connecting rod. When the adjustment knob is rotated, the connecting rod can move in the up and down direction relative to the sealing bushing, and drive the multiple blocking plates to move synchronously.

[0013] In one possible implementation, the speed transmission structure includes: Multiple driven gears are fitted one-to-one around the outer periphery of multiple feeding cylinders; and A drive gear is sleeved on the outer periphery of the drain pipe and meshes with each of the driven gears; The transmission ratio between the driving gear and the driven gear is greater than one, so that the rotational speed of the driven gear is greater than the rotational speed of the driving gear.

[0014] In one possible implementation, the inner diameter of each feed cylinder gradually decreases from top to bottom.

[0015] In one possible implementation, the wastewater recycling device further includes: Multiple liquid distribution pipes are connected to multiple feeding cylinders in a one-to-one correspondence, and each liquid distribution pipe is used to introduce wastewater; the output end of the liquid distribution pipe faces the horizontal direction so that the wastewater introduced into the feeding cylinder has the inertia of flowing tangentially along the inner wall of the feeding cylinder.

[0016] In this embodiment, calcium carbonate production wastewater and coal slag are fed into a device via multiple feeding cylinders. Each feeding cylinder rotates around its own axis, uniformly mixing the mixture inside. A valve body adjusts the connection between the feeding and discharging cylinders (e.g., open / closed). After the mixture is fully mixed and reacted, the valve body controls the mixture's entry into the discharging cylinder. A guiding component can select to receive or avoid the falling trajectory of the mixture as needed; if the guiding component receives the mixture, it can guide it to a corresponding tray. The liquid in the mixture on the tray (i.e., purified water) is discharged through a water inlet into a coaxially arranged drain pipe, and finally discharged and recycled from the lower end of the drain pipe. A rotation drive component drives the drain pipe to rotate via a speed-changing transmission structure, simultaneously driving multiple feeding cylinders to rotate synchronously.

[0017] The wastewater recovery device for calcium carbonate production provided in this application embodiment, compared with the prior art, achieves the mixing of coal slag and wastewater by rotating the feeding cylinder, rather than by a stirring shaft. This avoids the shearing force generated by the stirring shaft, thus preventing damage to the coal slag. During rotation, the coal slag is mainly subjected to gravity and centrifugal force, resulting in low collision intensity with the cylinder wall and a significantly reduced probability of breakage. The device lacks protruding mechanical components (such as stirring blades) like traditional stirring shafts, preventing the coal slag from breaking due to direct collisions with these components. The material guiding component adjusts the material's falling path only through guide plates, and the tray separates the liquid through water holes. There is no mechanical squeezing or shearing action throughout the process, further protecting the integrity of the coal slag particles.

[0018] Therefore, the wastewater recycling method of this application can significantly reduce the phenomenon of coal slag breaking into fine particles, avoid the fine particles being discharged with the purified water, improve the wastewater purification effect (the adsorption of coal slag is more complete), and save the time-consuming step of subsequent sedimentation and separation, ultimately improving the wastewater treatment efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A three-dimensional structural schematic diagram of a wastewater recovery device for calcium carbonate production provided in an embodiment of the present invention; Figure 2 A front view schematic diagram of the wastewater recovery device for calcium carbonate production provided in an embodiment of the present invention; Figure 3 A top view schematic diagram of a wastewater recovery device for calcium carbonate production provided in an embodiment of the present invention; Figure 4 For along Figure 3 Schematic diagram of the cross-sectional structure along line AA; Figure 5 for Figure 4 A magnified structural diagram of region I in the middle; Figure 6 A three-dimensional structural diagram of the wastewater recovery device for calcium carbonate production provided in an embodiment of the present invention. Figure 2 (For clarity, some structures have been omitted); Figure 7 A three-dimensional structural diagram of the wastewater recovery device for calcium carbonate production provided in an embodiment of the present invention. Figure 3 (For clarity, some structures have been omitted); Figure 8 This is a three-dimensional structural diagram of the mounting ring and material guiding assembly used in an embodiment of the present invention; Figure 9 This is a three-dimensional structural diagram of the tray used in an embodiment of the present invention; The following are the labeling elements in the figure: 1. Feeding cylinder; 2. Feeding cylinder; 21. Valve body; 3. Drain pipe; 31. Water passage hole; 32. Sealing bushing; 4. Tray; 41. Material drop port; 42. Blocking plate; 5. Material guiding assembly; 51. Mounting ring; 511. Vision sensor; 52. Guide plate; 6. Speed ​​transmission structure; 61. Driven gear; 62. Drive gear; 7. Linear drive component; 71. Transmission seat; 72. Transmission screw; 73. First rotating motor; 8. Lifting drive component; 81. Connecting rod; 82. Adjusting knob; 9. Liquid distribution pipe. Detailed Implementation

[0021] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0022] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0023] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] Please refer to the following: Figures 1 to 9 The wastewater recovery device for calcium carbonate production provided in this application will now be described. The wastewater recovery device for calcium carbonate production includes a feeding cylinder 1, a drain pipe 3, and multiple feeding guide components 5.

[0026] The upper side of the feed cylinder 1 has multiple feed cylinders 2 arranged at intervals along its circumference; each feed cylinder 2 is connected to the feed cylinder 1 and is connected to a valve body 21 for adjusting its communication state with the feed cylinder 1; the valve body 21 can be a solenoid valve, and the opening and closing state of the solenoid valve can be controlled by a remote program.

[0027] The drain pipe 3 is coaxially arranged inside the feed cylinder 1, and its lower end extends out of the feed cylinder 1; the drain pipe 3 has multiple trays 4 spaced apart along the axial direction, and each tray 4 has a water passage hole 31 on its upper side that communicates with the drain pipe 3 so that the liquid components in the mixture on the tray 4 can enter the drain pipe 3.

[0028] Multiple material guiding components 5 are spaced apart in the feed cylinder 1 along the vertical direction and correspond one-to-one with multiple trays 4; each material guiding component 5 is used to receive the mixture discharged from the feed cylinder 2, or to avoid the falling trajectory of the mixture, and also to discharge the mixture falling on it to the corresponding tray 4.

[0029] Each feeding cylinder 2 is adapted to rotate about its central axis to mix the material inside the feeding cylinder 2; the drain pipe 3 is connected to a rotation drive component and a speed transmission structure 6, which is connected to each feeding cylinder 2 to drive multiple feeding cylinders 2 to rotate synchronously.

[0030] The rotating drive component drives the drain pipe 3 to rotate, and the drain pipe 3 drives multiple feeding cylinders 2 to rotate passively through the speed change transmission structure 6; the rotating drive component drives the drain pipe 3 to rotate slowly, and the drain pipe 3 drives multiple feeding cylinders 2 to rotate quickly through the speed change transmission component; the rapid rotation of the feeding cylinders 2 can meet the requirement of uniform mixing of wastewater and coal slag, and the slow rotation of the drain pipe 3 can make the mixture discharged from the feeding cylinders 2 evenly distributed on the tray 4, and will not cause the mixture to be thrown out of the tray 4 due to excessive rotation speed.

[0031] In this embodiment, calcium carbonate production wastewater and coal slag are added to the device through multiple feeding cylinders 2. The feeding cylinders 2 rotate around their own axes to uniformly mix the mixture inside. The valve body 21 can adjust the communication state between the feeding cylinder 2 and the discharge cylinder 1 (e.g., open / close). After the mixture is fully mixed and reacted, the valve body 21 is suitable for controlling the mixture to enter the discharge cylinder 1. The guiding component 5 can select to receive or avoid the falling trajectory of the mixture as needed; if the guiding component 5 receives the mixture, it can guide the mixture to the corresponding tray 4. The liquid in the mixture on the tray 4 (i.e., purified water) is discharged into the coaxially arranged drain pipe 3 through the water passage 31, and finally discharged and recycled from the lower end of the drain pipe 3. The rotation drive component drives the drain pipe 3 to rotate through the speed transmission structure 6, and simultaneously drives the multiple feeding cylinders 2 to rotate synchronously.

[0032] Compared with the prior art, the wastewater recovery device for calcium carbonate production provided in this application embodiment rotates around its own axis, causing the internal slag and wastewater to flow and mix naturally, rather than generating strong shearing force through the high-speed rotation of the stirring shaft. During the rotation, the slag is mainly subjected to gravity and centrifugal force, resulting in low collision intensity with the cylinder wall and a significantly reduced probability of breakage. The device does not have any protruding mechanical components (such as stirring blades) like traditional stirring shafts, so the slag will not break due to direct collision with these components. The material guiding component 5 only adjusts the material falling path through the guide plate 52, and the tray 4 separates the liquid through the water passage 31. There is no mechanical squeezing or shearing action throughout the process, further protecting the integrity of the slag particles.

[0033] Therefore, the wastewater recycling method of this application can significantly reduce the phenomenon of coal slag breaking into fine particles, avoid the fine particles being discharged with the purified water, improve the wastewater purification effect (the adsorption of coal slag is more complete), and save the time-consuming step of subsequent sedimentation and separation, ultimately improving the wastewater treatment efficiency.

[0034] In some embodiments, the feeding assembly 5 described above may employ, for example... Figure 4 , Figure 6 and Figure 8 The structure shown is described in the following document. Figure 4 , Figure 6 and Figure 8 The upper end face of the feeding cylinder 1 is provided with multiple feeding ports that correspond one-to-one with multiple feeding cylinders 2; the guiding assembly 5 includes a mounting ring 51 and multiple guide plates 52.

[0035] The mounting ring 51 is fitted around the outer periphery of the corresponding tray 4, and the outer peripheral surface of the mounting ring 51 is in contact with the inner peripheral surface of the feed cylinder 1. The fit between the mounting ring 51 and the inner peripheral surface of the feed cylinder 1 prevents material leakage from the gap. There is an annular reserved space between the inner edge of the mounting ring 51 and the outer edge of the tray 4, through which the mixture falling from the feed inlet can pass. The inner diameter of the mounting ring 51 can be designed with an inclined shape that increases from top to bottom, which can be matched with the inclined angle of the guide plate 52 to accelerate the material descent.

[0036] Multiple guide plates 52 are spaced circumferentially on the mounting ring 51, each corresponding to a specific feed inlet. Each guide plate 52 is slidably connected to the mounting ring 51 and is driven by a linear drive component 7. A wear-resistant coating (such as polytetrafluoroethylene) can be applied to the surface of the guide plates 52 to reduce frictional wear caused by slag in the mixture. The linear drive component 7 can be replaced with a cylinder or hydraulic push rod to adapt to high-load scenarios. The guide plates 52 can be slidably adjusted to flexibly control whether materials fall into the corresponding tray 4 (e.g., selecting the guide based on the load state of different trays 4).

[0037] Each guide plate 52 is used to move into the reserved space to receive the mixture discharged from the corresponding feed port and guide the mixture to the corresponding tray 4.

[0038] After the mixture of wastewater and coal slag is discharged from the upper feed cylinder 2, it falls into the feed inlet at the upper end of the lower feed cylinder 1. If the guide plate 52 of the guide assembly 5 does not block the reserved space (annular gap), the mixture can fall directly through the reserved space; if the guide plate 52 moves into the reserved space, the mixture can be received by the guide plate 52 and slide towards the tray 4.

[0039] The linear drive component 7 (such as a motor + screw) drives the guide plate 52 to slide along the inner side of the mounting ring 51, adjusting the position of the guide plate 52 in the reserved space, thereby controlling the guiding path of the mixture.

[0040] In some embodiments, the linear drive member 7 described above may be as follows: Figure 4 , Figure 6 and Figure 8 The structure shown is described in the following document. Figure 4 , Figure 6 and Figure 8 The inner diameter of the mounting ring 51 gradually increases from top to bottom; the guide plate 52 is slidably connected to the inner side of the mounting ring 51 so that its surface is inclined; the linear drive component 7 includes a transmission seat 71 and a transmission screw 72.

[0041] The transmission seat 71 is mounted on the guide plate 52, and the transmission seat 71 has a threaded hole that extends through the guide plate 52 in the sliding direction.

[0042] The transmission screw 72 is rotatably mounted on the mounting ring 51 and threadedly connected to the threaded hole; the transmission screw 72 is driven by a first rotary motor 73 for rotating it. The first rotary motor 73 drives the transmission screw 72 to rotate, which in turn drives the transmission seat 71 to move axially along the screw through the threaded hole, thereby pushing the guide plate 52 to slide along the inner side of the mounting ring 51. Because the inner diameter of the mounting ring 51 is smaller at the top and larger at the bottom, the surface of the guide plate 52 is inclined.

[0043] After the inclined guide plate 52 receives the material, it uses gravity to make the material slide along the plate surface onto the pallet 4, thus completing the directional conveying.

[0044] The transmission screw 72 can be replaced with a ball screw to reduce friction loss and extend service life. The tilt angle of the guide plate 52 can be adjusted according to the material characteristics (e.g., increase the tilt angle for viscous materials). The first rotating motor 73 can be a stepper motor to achieve more precise position control.

[0045] By adopting the above technical solution, the screw drive has the advantage of high precision, which can accurately control the position of the guide plate 52 (such as millimeter-level adjustment) and adapt to the needs of fine separation; the inclined design of the guide plate 52 reduces the accumulation of mixture and improves the conveying efficiency; the first rotating motor 73 can be controlled by PLC programming to realize automatic adjustment (such as linkage with the subsequent vision sensor 511).

[0046] In some embodiments, the mounting ring 51 described above may be as follows: Figure 4 , Figure 6 and Figure 8 The structure shown is described in the following document. Figure 4 , Figure 6 and Figure 8 The upper side of tray 4 features a concave structure to maximize the capacity for holding the mixture. This concave structure increases the capacity of tray 4, allowing it to hold more mixture and reducing the need for frequent discharge operations.

[0047] Each mounting ring 51 is equipped with a vision sensor 511; the vision sensor 511 is positioned facing the corresponding tray 4 to monitor the total amount of mixture on the tray 4, and outputs a control signal when the total amount is equal to or greater than the maximum capacity value; the vision sensor 511 monitors the total amount of mixture on the corresponding tray 4 in real time (through image recognition or infrared ranging).

[0048] The signal output module of the vision sensor 511 is electrically connected to the control module of each linear drive component 7 on the mounting ring 51, enabling the vision sensor 511 to simultaneously output control signals to multiple linear drive components 7 to control multiple guide plates 52 to move simultaneously outside the reserved space. The synchronous movement of multiple guide plates 52 ensures consistent stopping of feeding and avoids uneven distribution of the mixture on the tray 4. The vision sensor 511 can be replaced with a pressure sensor (installed at the bottom of the tray 4) to monitor the capacity by weight. The control signal of the vision sensor 511 can actuate the valve body 21, thereby synchronously closing the valve body of the corresponding feeding cylinder 2, achieving dual protection against overload of the tray 4.

[0049] When the total amount of mixture reaches the maximum capacity of tray 4, that is, the upper limit of the volume of the concave structure of tray 4, the vision sensor 511 outputs a control signal, and the linear drive component 7 synchronously drives all guide plates 52 to exit the reserved space, stopping the feeding of material into the tray 4.

[0050] In some embodiments, the aforementioned water passage 31 can be as follows: Figure 4 and Figure 6 The structure shown is described in the following document. Figure 4 and Figure 6 The water passage 31 includes multiple sets of filter holes.

[0051] Multiple sets of filter holes are spaced circumferentially along the drain pipe 3, and each set includes multiple filter holes spaced axially along the drain pipe 3. When wastewater enters the drain pipe 3 through the water passage 31 on the tray 4, it must pass through multiple sets of filter holes (distributed circumferentially and axially along the drain pipe 3). The filter holes can intercept solid particles (such as fine calcium carbonate powder) in the mixture, allowing only the purified liquid in the mixture to pass through. The filter holes can be designed as stepped holes (large inlet, small outlet) to enhance the interception effect. The surface of the filter holes can be coated with an oleophobic coating (if the wastewater contains oil) to improve liquid permeability. Filter screens (such as metal screens) can be added inside the filter holes to further improve the filtration accuracy.

[0052] Multiple sets of filter holes can disperse the inflow path of the liquid in the mixture, preventing solid particles from passing through the filter holes due to excessively high local flow velocities; the circumferential and axial spacing of multiple filter holes can increase the total filter hole area and improve liquid recovery efficiency. The filter hole structure is simple and easy to process and maintain (e.g., it can be backflushed when clogged).

[0053] In some embodiments, the tray 4 described above may be as follows: Figure 4 , Figure 6 and Figure 9 The structure shown is described in the following document. Figure 4 , Figure 6 and Figure 9 The tray 4 has a material discharge port 41 that runs through the vertical direction, and a blocking plate 42 located on its lower side.

[0054] The blocking plate 42 is slidably connected to the drain pipe 3 in the vertical direction, and the drain pipe 3 has a lifting drive component 8 that is connected to each blocking plate 42 in a transmission manner.

[0055] The lifting drive component 8 can drive multiple blocking plates 42 to lift and lower synchronously, so that the blocking plates 42 move to abut the lower side of the pallet 4 and close the discharge port 41; or move the blocking plates 42 to separate from the lower side of the pallet 4 and open the discharge port 41.

[0056] A sealing strip can be added to the contact surface between the blocking plate 42 and the tray 4 to prevent liquid leakage; the lifting drive component 8 can be replaced with an electric push rod to adapt to the high-frequency material discharge requirements; the discharge port 41 can be designed as a cone (larger at the top and smaller at the bottom) to accelerate the material falling.

[0057] The blocking plate 42 is slidably connected to the drain pipe 3, with a compact structure that does not occupy additional space. Multiple blocking plates 42 are controlled by the same lifting drive component 8 to achieve synchronous lifting, ensuring consistent discharge actions of each tray 4. The design of the discharge port 41 ensures efficient cleaning of subsequent coal slag when the equipment needs to be cleaned.

[0058] In some embodiments, the lifting drive member 8 may be as follows: Figure 2 , Figure 4 , Figure 5 and Figure 6 The structure shown is described in the following document. Figure 2 , Figure 4 , Figure 5 and Figure 6 The bottom of the feed cylinder 1 has an installation hole suitable for the passage of the drain pipe 3. A sealing sleeve 32 is fitted onto the drain pipe 3 to fill the space between it and the installation hole. The sealing sleeve 32 has a through hole extending in the vertical direction. The lifting drive component 8 includes a connecting rod 81 and an adjusting knob 82. The sealing sleeve 32 fills the gap between the drain pipe 3 and the installation hole at the bottom of the feed cylinder 1 to prevent wastewater leakage.

[0059] Connecting rod 81 is disposed inside the feed cylinder 1; connecting rod 81 is connected to each blocking plate 42 and also slidably connected to each tray 4 in the vertical direction; furthermore, the lower end of connecting rod 81 extends through a through hole, and the extended portion of connecting rod 81 has an external thread structure. A dust cover can be added to the extended portion of connecting rod 81 to prevent external impurities from entering the thread gap. The through hole design of the sealing bushing 32 allows connecting rod 81 to pass through while maintaining a seal to prevent wastewater from seeping out from the mounting hole.

[0060] The adjusting knob 82 is rotatably mounted on the sealing sleeve 32, and has a through hole extending along its rotation axis. The inner wall of the through hole has an internal thread structure so that the adjusting knob 82 can be threadedly connected to the protruding part of the connecting rod 81. The adjusting knob 82 can be equipped with scale markings for convenient and precise control of the lifting height of the blocking plate 42.

[0061] When the adjustment knob 82 is rotated (the internal thread engages with the external thread of the connecting rod 81), the connecting rod 81 can move relative to the sealing bushing 32 in the up and down direction, and drive multiple blocking plates 42 to move synchronously. The connecting rod 81 is slidably connected to the tray 4 to ensure smooth movement.

[0062] The threaded drive (adjusting knob 82 and connecting rod 81) provides a self-locking function, and the position of the blockage plate 42 can be stably maintained after adjustment; manual adjustment (rotating knob) and automatic adjustment (such as motor-driven knob) are compatible to meet different scenario requirements.

[0063] In some embodiments, the above-described speed transmission structure 6 can adopt the following... Figure 1 , Figure 2 , Figure 4 , Figure 6 and Figure 7 The structure shown is described in the following document. Figure 1 , Figure 2 , Figure 4 , Figure 6 and Figure 7 The speed transmission structure 6 includes multiple driven gears 61 and drive gears 62.

[0064] Multiple driven gears 61 are fitted one-to-one on the outer periphery of multiple feeding cylinders 2.

[0065] The drive gear 62 is fitted around the outer periphery of the drain pipe 3 and meshes with each driven gear 61.

[0066] The transmission ratio between the driving gear 62 and the driven gear 61 is greater than one, so that the rotational speed of the driven gear 61 is greater than the rotational speed of the driving gear 62.

[0067] The rotating drive component drives the drain pipe 3 to rotate, and the drive gear 62 (sleeved on the outer circumference of the drain pipe 3) rotates synchronously. The drive gear 62 meshes with multiple driven gears 61 (sleeved on the outer circumference of the upper feed cylinder 2). Because the transmission ratio is greater than one (the number of teeth of the driven gear 61 is less than that of the drive gear 62), the speed of the driven gear 61 is higher than that of the drive gear 62, thereby driving the upper feed cylinder 2 to rotate at high speed.

[0068] Helical gears can be used for driven gear 61 and drive gear 62 to reduce transmission noise; planetary gear sets can be used for drive gear 62 and driven gear 61 to further optimize the speed ratio.

[0069] The transmission structure of the drive gear 62 and driven gear 61 has the advantages of compact structure and high transmission efficiency, and is suitable for multi-axis synchronous drive. The design of the transmission ratio of the drive gear 62 and driven gear 61 being greater than one enables the feed cylinder 2 to rotate at a higher speed than the drain pipe 3, thereby enhancing the mixing effect of the materials inside (such as the centrifugal force generated by high-speed rotation, which promotes solid-liquid dispersion). The driven gear 61 corresponds one-to-one with the feed cylinder 2, ensuring that all feed cylinders 2 rotate synchronously and avoiding uneven mixing of the mixture in each feed cylinder 2.

[0070] In some embodiments, the feeding cylinder 2 can be adopted as follows: Figure 1 , Figure 4 , Figure 6 and Figure 7 The structure shown is described in the following document. Figure 1 , Figure 4 , Figure 6 and Figure 7 The inner diameter of each feeding cylinder 2 gradually decreases from top to bottom.

[0071] The inner diameter of the feeding cylinder 2 gradually decreases from top to bottom (like a conical structure). After the material enters from the top, the centripetal pressure is generated due to the contraction of the cylinder wall, which accelerates the mixing of the material and wastewater (the centrifugal force and the pressure of the contracting wall work together during rotation).

[0072] The cone angle can be adjusted according to the particle size of the material (e.g., increase the angle for coarse particles and decrease the angle for fine particles); the feed cylinder 2 can be designed as a segmented type (multiple segments with different cone angles) to adapt to the needs of different mixing stages.

[0073] The conical structure of the feeding cylinder 2 can increase the contact area between the mixture and the cylinder wall, thereby improving the mixing efficiency; the reduced inner diameter compresses the material during the falling process, reducing the porosity and facilitating subsequent solid-liquid separation (the liquid is more easily squeezed into the water passage 31); the conical structure design is simple, and the mixing effect can be enhanced without additional stirring structure, and it can also prevent the coal slag in the mixture from being crushed, resulting in the generation of fine solid particles.

[0074] In some embodiments, the above-mentioned wastewater recovery device may employ, for example... Figure 1 , Figure 2 , Figure 4 and Figure 6 The structure shown is described in the following document. Figure 1 , Figure 2 , Figure 4 and Figure 6 The wastewater recovery device also includes multiple liquid distribution pipes 9.

[0075] Multiple dispensing pipes 9 are connected one-to-one with multiple feeding cylinders 2, and each dispensing pipe 9 is used to introduce wastewater. The output end of the dispensing pipe 9 faces horizontally so that the wastewater entering the feeding cylinder 2 has the inertia of flowing tangentially along the inner wall of the feeding cylinder 2. A nozzle (such as a spiral nozzle) can be added to the output end of the dispensing pipe 9 to refine the wastewater particles and increase the contact area with the material. The dispensing pipe 9 can be designed as a rotatable structure to adjust the tangential angle (such as adjusting the swirling intensity according to the material viscosity). The dispensing pipe 9 can be connected to a flow meter to achieve precise control of the wastewater flow rate (such as linkage with the feeding speed).

[0076] The tangentially introduced wastewater utilizes inertia to form a vortex flow with the rotation of the feed cylinder 2, which can reduce energy loss; the vortex mixing allows the wastewater and coal slag to come into more thorough contact, improving the reaction efficiency of the wastewater and coal slag.

[0077] The wastewater recovery device can also be designed with multiple distribution pipes, which are connected one-to-one with multiple feeding cylinders 2, and each distribution pipe is used to introduce coal slag; the output end of the distribution pipe is located above the output end of the corresponding liquid distribution pipe 9, so that the coal slag introduced into the feeding cylinder 2 can fall onto the wastewater flowing tangentially along the inner conical surface of the feeding cylinder 2, so that the coal slag and wastewater can be mixed evenly.

[0078] As the feeding cylinder 2 rotates around its own axis, the tangentially flowing wastewater forms a downward spiral within the cylinder. After the coal slag falls onto the surface of the wastewater spiral, it is driven by the spiral (the inertial force of the wastewater flow) and the centrifugal force of the rotating feeding cylinder 2, and rotates synchronously with the wastewater and flows downward. The coal slag and wastewater naturally come into contact and mix during the flow.

[0079] The coal slag falls directly onto the tangentially flowing surface of the swirling wastewater. The swirling inertia of the wastewater drives the coal slag to move synchronously, and the two come into full contact during the flow. This avoids the uneven mixing caused by local strong shearing forces in traditional stirring shafts (such as coal slag accumulation or wastewater not contacting coal slag in certain areas). The inner conical structure of the feed cylinder 2 causes the wastewater to gradually contract as it swirls downward. The contact area between the coal slag and the wastewater increases as the flow path extends, further enhancing the uniformity of mixing and improving the adsorption efficiency of the coal slag on pollutants in the wastewater (such as calcium and magnesium ions and residual treatment agents).

[0080] The mixing of coal slag and wastewater relies on the swirling of wastewater and the centrifugal force of the rotating feed cylinder 2. There is no mechanical shearing or collision from the traditional stirring shaft (i.e., the technical problem mentioned in the background art). The coal slag is only subjected to fluid friction and its own gravity, which greatly reduces the probability of breakage.

[0081] The coal slag is kept in a larger particle state, making it easier to intercept during subsequent separation through tray 4 (without relying on a filter screen to filter fine particles), preventing fine particles from being discharged with the purified water, reducing the time-consuming steps of sedimentation and separation, and improving overall processing efficiency.

[0082] The design of the positions of the feed pipe and the liquid distribution pipe 9 (feed pipe on top, liquid distribution pipe 9 on the bottom) utilizes gravity to naturally complete the contact between the coal slag and wastewater, without the need for additional power to drive the mixing.

[0083] The rotational power of the feeding cylinder 2 comes from the linkage drive of the drain pipe 3, and is also used for mixing coal slag and wastewater, realizing "one power source driving multiple functions", further reducing the energy consumption and complexity of the device.

[0084] The design of the new distribution pipe, through the "swirling contact + natural mixing" mode of coal slag and wastewater, significantly improves the mixing uniformity and purification efficiency while avoiding coal slag breakage, which is a key optimization for the wastewater recovery device.

[0085] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wastewater recovery device for calcium carbonate production, characterized in that, include: The feed cylinder has multiple feed cylinders spaced apart along its circumference on its upper side; each feed cylinder is connected to the feed cylinder and is connected to a valve body for adjusting its communication state with the feed cylinder; A drain pipe is coaxially disposed inside the feed cylinder, with its lower end extending outside the feed cylinder; the drain pipe has multiple trays spaced apart along the axial direction, and each tray has a water passage hole on its upper side that communicates with the drain pipe, so that the liquid components in the mixture on the tray can enter the drain pipe; as well as Multiple material guiding components are spaced apart in the feed cylinder along the vertical direction and correspond one-to-one with multiple trays; each material guiding component is used to receive the mixture discharged from the feed cylinder, or to avoid the falling trajectory of the mixture, and is also used to discharge the mixture falling on it to the corresponding tray. Each of the feeding cylinders is adapted to rotate about its central axis to mix the material inside the feeding cylinder; the drain pipe is driven by a rotation drive component and a speed transmission structure, the speed transmission structure being driven by each of the feeding cylinders to drive the multiple feeding cylinders to rotate synchronously.

2. The wastewater recovery device for calcium carbonate production as described in claim 1, characterized in that, The upper end face of the feeding cylinder has multiple feeding ports that correspond one-to-one with the multiple feeding cylinders; the guiding assembly includes: A mounting ring is fitted around the outer periphery of the corresponding tray, and the outer peripheral surface of the mounting ring is in contact with the inner peripheral surface of the feed cylinder; a ring-shaped reserved space is provided between the inner edge of the mounting ring and the outer edge of the tray, allowing the mixture falling from the feed inlet to pass through the reserved space; and Multiple guide plates are spaced apart on the mounting ring along its circumference, and each guide plate corresponds to one of the multiple feed ports; each guide plate is slidably connected to the mounting ring and is driven by a linear drive component. Each of the guide plates is used to move into the reserved space to receive the mixture discharged from the corresponding feed port and guide the mixture onto the corresponding tray.

3. The wastewater recovery device for calcium carbonate production as described in claim 2, characterized in that, The inner diameter of the mounting ring gradually increases from top to bottom; the guide plate is slidably connected to the inner side of the mounting ring so that its surface is inclined; the linear drive component includes: A transmission seat is disposed on the guide plate, and the transmission seat has a threaded hole extending along the sliding direction of the guide plate; and A drive screw is rotatably mounted on the mounting ring and threadedly connected to the threaded hole; the drive screw is driven by a first rotary motor for driving its rotation.

4. The wastewater recovery device for calcium carbonate production as described in claim 2 or 3, characterized in that, The upper side of the tray has a concave structure to form the maximum capacity value for holding the mixture; Each of the mounting rings is equipped with a vision sensor; the vision sensor is oriented toward the corresponding tray to monitor the total amount of mixture on the tray, and outputs a control signal when the total amount is equal to or greater than the maximum capacity value; The signal output module of the vision sensor is electrically connected to the control module of each of the linear drive components on the mounting ring, so that the vision sensor can simultaneously output the control signal to multiple linear drive components to control multiple guide plates to move simultaneously outside the reserved space.

5. The wastewater recovery device for calcium carbonate production as described in claim 1, characterized in that, The water passage includes: Multiple sets of filter holes are spaced apart circumferentially along the drain pipe, and each set of filter holes includes multiple filter holes spaced apart axially along the drain pipe.

6. The wastewater recovery device for calcium carbonate production as described in claim 1, characterized in that, The tray has a material discharge port that runs through the vertical direction, and a material blocking plate located on its lower side. The blocking plate is slidably connected to the drain pipe in the vertical direction, and the drain pipe has a lifting drive component that is pulsatorically connected to each of the blocking plates; The lifting drive component can drive multiple blocking plates to lift and lower synchronously, so that the blocking plates move to abut against the lower side of the tray and close the discharge port; or move the blocking plates to separate from the lower side of the tray and open the discharge port.

7. The wastewater recovery device for calcium carbonate production as described in claim 6, characterized in that, The bottom of the feed cylinder has an installation hole suitable for the drainage pipe to pass through, and a sealing bushing that fills the space between the drainage pipe and the installation hole is fitted onto the drainage pipe; the sealing bushing has a through hole extending in the vertical direction; the lifting drive component includes: A connecting rod is disposed inside the feed cylinder; the connecting rod is connected to each of the blocking plates and is also slidably connected to each of the trays in the vertical direction; furthermore, the lower end of the connecting rod extends through the through hole, and the extended portion of the connecting rod has an external thread structure; and An adjustment knob is rotatably mounted on the sealing bushing, and the adjustment knob has a through hole extending along its rotation axis. The inner wall of the through hole has an internal thread structure so that the adjustment knob is threadedly connected to the protruding part of the connecting rod. When the adjustment knob is rotated, the connecting rod can move in the up and down direction relative to the sealing bushing, and drive the multiple blocking plates to move synchronously.

8. The wastewater recovery device for calcium carbonate production as described in claim 1, characterized in that, The speed transmission structure includes: Multiple driven gears are fitted one-to-one around the outer periphery of multiple feeding cylinders; and A drive gear is fitted around the outer periphery of the drain pipe and meshes with each of the driven gears; The transmission ratio between the driving gear and the driven gear is greater than one, so that the rotational speed of the driven gear is greater than the rotational speed of the driving gear.

9. The wastewater recovery device for calcium carbonate production as described in claim 1, characterized in that, The inner diameter of each feed cylinder gradually decreases from top to bottom.

10. The wastewater recovery device for calcium carbonate production as described in claim 1 or 9, characterized in that, The wastewater recycling device also includes: Multiple liquid distribution pipes are connected to multiple feeding cylinders in a one-to-one correspondence, and each liquid distribution pipe is used to introduce wastewater; the output end of the liquid distribution pipe faces the horizontal direction so that the wastewater introduced into the feeding cylinder has the inertia of flowing tangentially along the inner wall of the feeding cylinder.

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