A device and process for treating high-alkali wastewater from sand washing

Abstract

The present invention relates to the technical field of wastewater treatment, and discloses a device for treating high-alkali wastewater from sand washing, comprising a belt-type concentrator body, a shell located in the belt concentrator body, and a conveyor filter belt installed at the upper end of the shell, wherein the upper end of the shell is fixedly installed with a mounting frame, and the lower end of the mounting frame is installed with two groups of mud paddles, and the front and rear groups of mud paddles are staggered, and a cavity is opened in the mounting frame. The present invention sleeves a connecting gear ring on the outer side of a rotating rod on the mud paddle, and the sawtooth bar engages with the connecting gear ring. By controlling the reciprocating movement of the sawtooth bar, a plurality of mud paddles can be driven to rotate forward and backward to avoid the mud paddles from being stationary. When the mud paddle is wider, more positions on the conveyor filter belt are not utilized, resulting in waste. When the mud paddle is narrower, the mixed liquid ditch is narrower, which affects the water flow rate of the conveyor filter belt and can avoid the ditch always remaining in the same position. In the later stage of transmission, the water flow rate at the ditch is low.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, in particular to a device for treating high-alkali wastewater from sand washing and a process thereof. Background Art

[0002] Since a large amount of alkali is added to the sand washing high-alkali wastewater, the wastewater contains a large amount of colloids, which are difficult to settle. It is necessary to add flocculants and then perform preliminary dehydration by a belt thickener. The activated sludge after dehydration is then squeezed by a filter press to achieve the maximum separation of mud and water, and finally form a filter cake for discharge. The existing belt thickener, such as the concentrated sediment auxiliary flocculation device disclosed in the authorization announcement number CN218202512U, flows the concentrated sediment from the bottom of the sedimentation tank or the concentration tank by its own weight into the mixing baffle trough. In the mixing baffle trough, the sediment flow, water injection volume and dosage are adjusted to make the concentrated sediment reach the optimal flocculation state for mud-water separation. Then, the flocculant and sediment are fully mixed and reacted through the mixing baffle trough, and flow into the mixing distributor. The sediment flocculated at the bottom is stirred and evenly transported by the mixing distributor into the thickener filter cloth for secondary mud-water separation. Finally, the sediment after secondary dehydration is sent to the filter press for dehydration treatment.

[0003] Currently, the existing belt concentrator is equipped with multiple groups of paddles, such as the above-mentioned prior art, which are used to form ridges on the mixed liquid to improve the water flow rate of the belt concentrator and improve the concentration efficiency. The existing paddles are fixed. When the paddles are wider, the ridges formed are wider, resulting in more unused positions on the conveyor filter belt, causing waste. When the paddles are narrower, the mixed liquid ridges are narrower, affecting the water flow rate of the conveyor filter belt. At the same time, the paddles will also cause the ridges to always remain in the same position. In the later stage of conveying, the water flow rate at the ridges is low. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the present invention provides a device and process for treating high-alkali wastewater from sand washing, which solves the problem that the traditional mud paddle is fixed and affects the water flow rate of the concentrator.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a device for treating high-alkali wastewater from sand washing, comprising a belt-type concentrator body, a shell located in the belt-type concentrator body, and a conveyor filter belt installed at the upper end of the shell, wherein a mounting frame is fixedly installed at the upper end of the shell, two sets of mud paddles are installed at the lower end of the mounting frame, and the front and rear sets of mud paddles are staggered. A cavity is opened in the mounting frame, and a plurality of rotating rods fixedly connected to the mud paddles are rotatably installed in the cavity, and a pushing assembly for controlling the rotation of the rotating rods is installed in the cavity. An installation cavity is opened in one side wall, and two groups of reciprocating components are rotatably installed in the installation cavity. The reciprocating components are used to control the movement of the pushing component. A feed barrel is fixedly installed on one side of the upper end of the shell, and a feeding component is rotatably installed in the feed barrel. A motor is installed on one side of the belt-type concentrator body, and the output end of the motor is fixedly connected to one end of the feeding component. A connecting component for controlling the rotation of the reciprocating component is fixedly installed on the output end of the motor. One side of the feed barrel is fixedly connected to a feed box, and the outside of the feed box is fixedly connected to a feed pipe and a medicine feed pipe.

[0006] Preferably, the pushing assembly includes a plurality of connecting tooth rings sleeved on the outside of the rotating rod, and the diameters of two adjacent connecting tooth rings are different. A serrated bar engaged with the connecting tooth rings is slidably connected in the cavity, and one end of the serrated bar is located in the installation cavity.

[0007] Preferably, the reciprocating assembly includes a connecting gear rotatably connected to the upper wall of the mounting cavity, the lower end of the connecting gear is fixedly connected to a turntable, one side of the lower end of the turntable is fixedly connected to a sliding rod, the serrated bar is located in the mounting cavity and fixedly connected to a rectangular frame at one end, and the sliding rod is slidably connected to the rectangular frame.

[0008] Preferably, the connecting assembly includes a half gear fixedly mounted on the output end of the motor, a serrated frame is slidably connected to the side wall of the mounting cavity, the half gear is engaged with the serrated frame, a serrated plate is fixedly connected to one side of the serrated frame, and the serrated plate is engaged with the connecting gear.

[0009] Preferably, the feeding assembly includes a rotating shaft fixedly connected to the output end of the motor, a plurality of conveying plates are fixed on the outside of the rotating shaft, a discharge port is opened on one side of the feeding barrel, an inclined plate is fixedly installed on one side of the discharge port, and a rotating assembly for mixing and stirring is installed in the feeding barrel.

[0010] Preferably, the rotating assembly includes a circular groove opened on the inner wall of one end of the feeding barrel, a disc is rotatably installed in the circular groove, an inner gear ring is fixedly installed on the inner wall of the circular groove, the rotating shaft is fixedly connected to the disc, a connecting shaft is rotatably installed through one side of the disc, a plurality of stirring blades are fixedly installed on the outside of the connecting shaft, a fixed gear ring is fixedly sleeved at one end of the connecting shaft, and the fixed gear ring is meshed with the inner gear ring.

[0011] Preferably, a material guide plate fixedly connected to the belt-type concentrator body is provided on one side of the conveyor filter belt.

[0012] Preferably, the bottom of the feed box is inclined.

[0013] A process for treating high-alkali wastewater from sand washing, comprising the following steps:

[0014] a. Pump the sand washing high-alkali wastewater and chemicals into the feed box through the feed pipe and the drug feed pipe respectively, control the flow of the feed pipe and the drug feed pipe to make them better mixed, and the mixed liquid flows into the feed barrel;

[0015] b. Start the motor and the conveyor filter belt. The motor drives the rotating shaft to rotate, and the rotating shaft drives multiple conveyor plates and discs to rotate. The multiple conveyor plates convey the mixed liquid to the conveyor filter belt through the discharge port. When the disc rotates, it drives multiple fixed gear rings to move. Through the cooperation of the fixed gear ring and the inner gear ring, it can drive the connecting shaft to rotate. The connecting shaft drives the stirring blade to rotate, stirring the mixed liquid in the feed barrel, so that the sand washing high-alkali wastewater and the reagent are mixed more evenly;

[0016] c. The mixed liquid achieves preliminary mud-water separation on the conveyor filter belt. When the mixed liquid is conveyed on the conveyor filter belt, it will pass through the mud paddle, which can form ridges in the mixed liquid to increase the water flow rate of the conveyor filter belt and improve the concentration efficiency;

[0017] d. During operation, the motor will also drive the half gear to rotate, the half gear drives the sawtooth frame to do reciprocating motion, the sawtooth frame drives the sawtooth plate to do reciprocating motion, the sawtooth plate drives the connecting gear to rotate forward and reverse, the connecting gear drives the turntable to rotate forward and reverse, the turntable drives the rectangular frame to do reciprocating motion, the rectangular frame drives the sawtooth bar to do reciprocating motion, the sawtooth bar drives the connecting gear ring to rotate forward and reverse, so that multiple mud paddles rotate forward and reverse to prevent the mud paddles from being stationary. When the mud paddles are wide, more positions on the conveying filter belt are not utilized, resulting in waste. When the mud paddles are narrow, the mixed liquid ditch is narrow, affecting the water flow rate of the conveying filter belt. At the same time, it can prevent the ditch from always remaining in the same position. In the later stage of transmission, the water flow rate at the ditch is low. Due to the different diameters of the two adjacent connecting gear rings, the rotation angles of the multiple mud paddles are different, which can change the ditch at all times and the water flow rate at each moment is optimal.

[0018] e. The sludge concentrated by the conveyor filter belt is conveyed to the filter press equipment, which gradually squeezes the sludge to achieve the maximum separation of mud and water, and finally forms a filter cake for discharge.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention sleeves a connecting tooth ring on the outer side of the rotating rod on the mud paddle, and the serrated bar is engaged with the connecting tooth ring. By controlling the reciprocating movement of the serrated bar, multiple mud paddles can be driven to rotate forward and reverse, avoiding the mud paddles from being stationary. When the mud paddle is wide, more positions on the conveying filter belt are not utilized, resulting in waste. When the mud paddle is narrow, the mixed liquid ditch is narrow, affecting the water flow rate of the conveying filter belt. At the same time, it can avoid the ditch always remaining in the same position. In the later stage of transmission, the water flow rate at the ditch is low. Since the diameters of the two adjacent connecting tooth rings are different, the rotation angles of the multiple mud paddles are different, which can change the ditch at all times and the water flow rate at each moment is optimal.

[0021] 2. The present invention fixes multiple conveying plates on the outside of the rotating shaft. After the mixed liquid enters the feed barrel, the motor works to drive the conveying plates to move and send the mixed liquid in the feed barrel to the conveyor filter belt. The mixed liquid stays in the feed barrel for a certain period of time to mix the medicine and wastewater, making the mixing more complete.

[0022] 3. The present invention rotates and installs a disc in a circular groove on the inner wall of one end of the feed shell. When the motor works, it can drive the disc to rotate, and the disc drives multiple fixed gear rings to move. Through the cooperation of the fixed gear ring and the inner gear ring, the connecting shaft can be driven to rotate, and the connecting shaft drives the stirring blade to rotate, thereby stirring the mixed liquid in the feed barrel, so that the sand washing high-alkali wastewater and the reagent are mixed more evenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the overall rear-view three-dimensional cross-sectional structure of the present invention;

[0025] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of A;

[0026] Figure 4 This is a schematic diagram of a top-down perspective cross-sectional structure of a belt-type concentrator body according to the present invention;

[0027] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of B;

[0028] Figure 6 for Figure 4 Schematic diagram of the enlarged structure of C in the middle;

[0029] Figure 7 Schematic diagram of the three-dimensional structure of the feeding assembly of the present invention;

[0030] Figure 8 Schematic diagram of the three-dimensional structure of the mud paddle of the present invention;

[0031] Figure 9 for Figure 8 Schematic diagram of the enlarged structure of D in the middle;

[0032] Figure 10 for Figure 8 Schematic diagram of the enlarged structure of E;

[0033] Figure 11 It is a schematic diagram of the three-dimensional cross-sectional structure of the feed barrel of the present invention.

[0034] In the figure: 1. Belt-type concentrator body; 2. Conveyor filter belt; 3. Mounting frame; 4. Discharge port; 5. Feed barrel; 6. Feed pipe; 7. Drug feed pipe; 8. Feed box; 9. Motor; 10. Inclined plate; 11. Guide plate; 12. Mud paddle; 13. Shell; 14. Cavity; 15. Fixed gear ring; 16. Connecting shaft; 17. Stirring blade; 18. Rotating shaft; 19. Conveying plate; 20. Mounting cavity; 21. Disc; 22. Circular groove; 23. Serrated plate; 24. Connecting gear; 25. Turntable; 26. Connecting gear ring; 27. Sawtooth bar; 28. Rotating rod; 29. ​​Sliding rod; 30. Sawtooth frame; 31. Half gear; 32. Rectangular frame; 33. Inner gear ring. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0036] See also Figures 1-11, a device for treating high-alkali wastewater from sand washing, comprising a belt-type concentrator body 1, a shell 13 located in the belt-type concentrator body 1 and a conveyor filter belt 2 installed at the upper end of the shell 13, a mounting frame 3 is fixedly installed on the upper end of the shell 13, and two sets of mud paddles 12 are installed at the lower end of the mounting frame 3, and the front and rear sets of mud paddles 12 are staggered to change the position of the ridges formed by the mud paddles 12 to avoid the ridges from being stationary and the water flow rate being reduced in the later stage, a cavity 14 is provided in the mounting frame 3, and a plurality of rotating rods 28 fixedly connected to the mud paddles 12 are rotatably installed in the cavity 14, and a pushing assembly for controlling the rotation of the rotating rod 28 is installed in the cavity 14, and a mounting cavity 20 is provided in one side wall of the belt-type concentrator body 1, and the pushing assembly includes a plurality of connecting gear rings 26 sleeved on the outside of the rotating rod 28, adjacent The two connecting tooth rings 26 have different diameters. A sawtooth bar 27 meshing with the connecting tooth ring 26 is slidably connected in the cavity 14. One end of the sawtooth bar 27 is located in the mounting cavity 20. By controlling the reciprocating movement of the sawtooth bar 27, the multiple mud paddles 12 are reversed to prevent the mud paddles 12 from being stationary. When the mud paddles 12 are wide, more positions on the conveyor filter belt 2 are not utilized, resulting in waste. When the mud paddles 12 are narrow, the mixed liquid ditch is narrow, affecting the water flow rate of the conveyor filter belt 2. At the same time, it can prevent the ditch from always remaining in the same position. In the later stage of transmission, the water flow rate at the ditch is low. Since the diameters of the two adjacent connecting tooth rings 26 are different, the rotation angles of the multiple mud paddles 12 are different, which can change the ditch at all times and the water flow rate at each moment is optimal.

[0037] Two sets of reciprocating components are rotatably installed in the installation chamber 20. The reciprocating components are used to control the movement of the pushing components. The reciprocating components include a connecting gear 24 rotatably connected to the upper wall of the installation chamber 20. The lower end of the connecting gear 24 is fixedly connected to a turntable 25. One side of the lower end of the turntable 25 is fixedly connected to a slide bar 29. The sawtooth bar 27 is located in the installation chamber 20 and is fixedly connected to a rectangular frame 32 at one end. The slide bar 29 is slidably connected to the rectangular frame 32. A feed barrel 5 is fixedly installed on one side of the upper end of the shell 13. A feeding component is rotatably installed in the feed barrel 5. A motor 9 is installed on one side of the belt-type concentrator body 1. The output end of the motor 9 is fixedly connected to one end of the feeding component. The output end of the motor 9 is fixedly installed with a connecting component that controls the rotation of the reciprocating component. The connecting component includes a half gear 31 fixedly sleeved on the output end of the motor 9. The side wall of the installation chamber 20 slides. A serrated frame 30 is dynamically connected, and a half gear 31 is meshed with the serrated frame 30. A serrated plate 23 is fixedly connected to one side of the serrated frame 30. The serrated plate 23 is meshed with the connecting gear 24. A feed box 8 is fixedly connected to one side of the feed barrel 5. The bottom of the feed box 8 is tilted. A feed pipe 6 and a medicine feed pipe 7 are fixedly connected to the outside of the feed box 8. The motor 9 can drive the half gear 31 to rotate, and the half gear 31 drives the serrated frame 30 to reciprocate. The serrated frame 30 drives the serrated plate 23 to reciprocate. The serrated plate 23 drives the connecting gear 24 forward and reverse. The connecting gear 24 drives the turntable 25 forward and reverse. The turntable 25 drives the rectangular frame 32 to reciprocate. The rectangular frame 32 drives the sawtooth bar 27 to reciprocate. The sawtooth bar 27 drives the connecting gear ring 26 forward and reverse, which is used to control the forward and reverse rotation of multiple mud paddles 12.

[0038] As a further solution of the present invention, the feeding assembly includes a rotating shaft 18 fixedly connected to the output end of the motor 9, a plurality of conveying plates 19 are fixed on the outside of the rotating shaft 18, a discharge port 4 is opened on one side of the feed barrel 5, and an inclined plate 10 is fixedly installed on one side of the discharge port 4. A rotating assembly for mixing and stirring is installed in the feed barrel 5. When the motor 9 is working, it can drive the conveying plate 19 to move and send the mixed liquid in the feed barrel 5 to the conveyor filter belt 2. The mixed liquid stays in the feed barrel 5 for a certain period of time to mix the medicine and wastewater, so that the mixing is more sufficient.

[0039] As a further solution of the present invention, the rotating component includes a circular groove 22 opened on the inner wall of one end of the feed barrel 5, a disc 21 is rotatably installed in the circular groove 22, an inner gear ring 33 is fixedly installed on the inner wall of the circular groove 22, the rotating shaft 18 is fixedly connected to the disc 21, a connecting shaft 16 is rotatably installed on one side of the disc 21, a plurality of stirring blades 17 are fixedly installed on the outside of the connecting shaft 16, a fixed gear ring 15 is fixedly sleeved on one end of the connecting shaft 16, the fixed gear ring 15 is engaged with the inner gear ring 33, and when the motor 9 is working, it can drive the disc 21 to rotate, and the disc 21 drives the plurality of fixed gear rings 15 to move. Through the cooperation of the fixed gear ring 15 and the inner gear ring 33, the connecting shaft 16 can be driven to rotate, and the connecting shaft 16 drives the stirring blades 17 to rotate, thereby stirring the mixed liquid in the feed barrel 5, so that the high-alkali wastewater from sand washing and the reagent are mixed more evenly.

[0040] As a further solution of the present invention, a guide plate 11 fixedly connected to the belt thickener body 1 is provided on one side of the conveyor filter belt 2, and the guide plate 11 facilitates the conveyance of the concentrated sludge to the filter press equipment.

[0041] A process for treating high-alkali wastewater from sand washing, comprising the following steps:

[0042] a. Pump the sand washing high-alkali wastewater and the reagent into the feed box 8 through the feed pipe 6 and the drug feed pipe 7 respectively, control the flow of the feed pipe 6 and the drug feed pipe 7 to make them better mixed, and the mixed liquid flows into the feed barrel 5;

[0043] b. Start the motor 9 and the conveyor filter belt 2. The motor 9 drives the rotating shaft 18 to rotate. The rotating shaft 18 drives the multiple conveyor plates 19 and the disc 21 to rotate. The multiple conveyor plates 19 convey the mixed liquid to the conveyor filter belt 2 through the discharge port 4. When the disc 21 rotates, it drives the multiple fixed gear rings 15 to move. Through the cooperation between the fixed gear ring 15 and the inner gear ring 33, it can drive the connecting shaft 16 to rotate. The connecting shaft 16 drives the stirring blade 17 to rotate, stirring the mixed liquid in the feed barrel 5, so that the sand washing high-alkali wastewater and the reagent are mixed more evenly;

[0044] c. The mixed liquid achieves preliminary mud-water separation on the conveyor filter belt 2. When the mixed liquid is conveyed on the conveyor filter belt 2, it passes through the mud paddle 12. The mud paddle 12 can form ridges in the mixed liquid to increase the water flow rate of the conveyor filter belt 2 and improve the concentration efficiency;

[0045] d. During operation, the motor 9 also drives the half gear 31 to rotate, the half gear 31 drives the sawtooth frame 30 to do reciprocating motion, the sawtooth frame 30 drives the sawtooth plate 23 to do reciprocating motion, the sawtooth plate 23 drives the connecting gear 24 to do forward and reverse motion, the connecting gear 24 drives the turntable 25 to do forward and reverse motion, the turntable 25 drives the rectangular frame 32 to do reciprocating motion, the rectangular frame 32 drives the sawtooth bar 27 to do reciprocating motion, the sawtooth bar 27 drives the connecting gear ring 26 to do forward and reverse motion, so that multiple fenders 12 are reversed, avoiding the fender 1 2 is stationary. When the paddle 12 is wide, more positions on the conveyor filter belt 2 are not utilized, resulting in waste. When the paddle 12 is narrow, the mixed liquid ditch is narrow, affecting the water flow rate of the conveyor filter belt 2. At the same time, it can prevent the ditch from always remaining in the same position. In the late stage of conveying, the water flow rate at the ditch is low. Since the diameters of the two adjacent connecting gear rings 26 are different, the rotation angles of the multiple paddles 12 are different, which can change the ditch at all times and ensure the optimal water flow rate at each moment.

[0046] e. The sludge concentrated by the conveyor filter belt 2 is conveyed to the filter press equipment, which gradually squeezes the sludge to achieve the maximum separation of mud and water, and finally forms a filter cake for discharge.

[0047] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will readily recognize that equivalent features may be substituted. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A device for treating high-alkali wastewater from sand washing, comprising a belt-type concentrator body (1), a shell (13) located in the belt-type concentrator body (1), and a conveyor filter belt (2) installed at the upper end of the shell (13), characterized in that: The upper end of the shell (13) is fixedly mounted with a mounting frame (3), and the lower end of the mounting frame (3) is mounted with two groups of mud paddles (12), and the front and rear groups of mud paddles (12) are staggered. A cavity (14) is provided in the mounting frame (3), and a plurality of rotating rods (28) fixedly connected to the mud paddles (12) are rotatably mounted in the cavity (14). A pushing assembly for controlling the rotation of the rotating rods (28) is installed in the cavity (14). A mounting cavity (20) is provided in one side wall of the belt-type concentrator body (1), and two groups of rotating rods (28) are rotatably mounted in the mounting cavity (20). A reciprocating assembly, wherein the reciprocating assembly is used to control the movement of the pushing assembly, a feed cylinder (5) is fixedly installed on one side of the upper end of the shell (13), a feeding assembly is rotatably installed in the feed cylinder (5), a motor (9) is installed on one side of the belt-type concentrator body (1), an output end of the motor (9) is fixedly connected to one end of the feeding assembly, a connecting assembly for controlling the rotation of the reciprocating assembly is fixedly installed on the output end of the motor (9), one side of the feed cylinder (5) is fixedly connected to a feed box (8), and the outside of the feed box (8) is fixedly connected to a feed pipe (6) and a medicine feed pipe (7); The pushing assembly includes a plurality of connecting tooth rings (26) sleeved on the outside of the rotating rod (28), and the diameters of two adjacent connecting tooth rings (26) are different. A sawtooth bar (27) meshing with the connecting tooth rings (26) is slidably connected in the cavity (14), and one end of the sawtooth bar (27) is located in the installation cavity (20).

2. The device for treating high-alkali wastewater from sand washing according to claim 1, characterized in that: The reciprocating assembly includes a connecting gear (24) rotatably connected to the upper wall of the installation cavity (20), a turntable (25) is fixedly connected to the lower end of the connecting gear (24), a slide bar (29) is fixedly connected to one side of the lower end of the turntable (25), and one end of the sawtooth bar (27) is fixedly connected to a rectangular frame (32) in the installation cavity (20), and the slide bar (29) is slidably connected to the rectangular frame (32).

3. The device for treating high-alkali wastewater from sand washing according to claim 2, characterized in that: The connecting assembly comprises a half gear (31) fixedly mounted on the output end of the motor (9); a sawtooth frame (30) is slidably connected to the side wall of the mounting cavity (20); the half gear (31) is meshed with the sawtooth frame (30); a sawtooth plate (23) is fixedly connected to one side of the sawtooth frame (30); and the sawtooth plate (23) is meshed with the connecting gear (24).

4. The device for treating high-alkali wastewater from sand washing according to claim 3, characterized in that: The feeding assembly includes a rotating shaft (18) fixedly connected to the output end of the motor (9), a plurality of conveying plates (19) are fixed on the outside of the rotating shaft (18), a discharge port (4) is opened on one side of the feeding barrel (5), an inclined plate (10) is fixedly installed on one side of the discharge port (4), and a rotating assembly for mixing and stirring is installed in the feeding barrel (5).

5. The device for treating high-alkali wastewater from sand washing according to claim 4, characterized in that: The rotating assembly includes a circular groove (22) provided on the inner wall of one end of the feed barrel (5), a disc (21) is rotatably mounted in the circular groove (22), an inner gear ring (33) is fixedly mounted on the inner wall of the circular groove (22), the rotating shaft (18) is fixedly connected to the disc (21), a connecting shaft (16) is rotatably mounted on one side of the disc (21), a plurality of stirring blades (17) are fixedly mounted on the outer side of the connecting shaft (16), a fixed gear ring (15) is fixedly sleeved on one end of the connecting shaft (16), and the fixed gear ring (15) is meshed with the inner gear ring (33).

6. The device for treating high-alkali wastewater from sand washing according to claim 5, characterized in that: A material guide plate (11) fixedly connected to the belt-type concentrator body (1) is provided on one side of the conveyor filter belt (2).

7. The device for treating high-alkali wastewater from sand washing according to claim 6, characterized in that: The bottom of the feed box (8) is arranged to be inclined.

8. A treatment process for a sand washing high-alkali wastewater treatment device according to claim 7, characterized in that: The following steps are involved: a. Pumping the sand washing high-alkali wastewater and the reagent into the feed box (8) through the feed pipe (6) and the reagent feed pipe (7), respectively, and controlling the flow of the feed pipe (6) and the reagent feed pipe (7) to achieve better mixing, and the mixed liquid flows into the feed barrel (5); b. Start the motor (9) and the conveyor filter belt (2). The motor (9) drives the rotating shaft (18) to rotate. The rotating shaft (18) drives the plurality of conveyor plates (19) and the disc (21) to rotate. The plurality of conveyor plates (19) convey the mixed liquid to the conveyor filter belt (2) through the discharge port (4). The disc (21) drives the plurality of fixed gear rings (15) to move when rotating. The fixed gear ring (15) cooperates with the inner gear ring (33) to drive the connecting shaft (16) to rotate. The connecting shaft (16) drives the stirring blade (17) to rotate, stirring the mixed liquid in the feed barrel (5), so that the sand washing high-alkali wastewater and the reagent are mixed more evenly. c. The mixed liquid is subjected to preliminary mud-water separation on the conveyor filter belt (2). When the mixed liquid is conveyed on the conveyor filter belt (2), it passes through the mud paddle (12). The mud paddle (12) can form ridges in the mixed liquid, thereby increasing the water flow rate of the conveyor filter belt (2) and improving the concentration efficiency; d. During operation, the motor (9) also drives the half gear (31) to rotate, the half gear (31) drives the sawtooth frame (30) to reciprocate, the sawtooth frame (30) drives the sawtooth plate (23) to reciprocate, the sawtooth plate (23) drives the connecting gear (24) to rotate forward and reverse, the connecting gear (24) drives the turntable (25) to rotate forward and reverse, the turntable (25) drives the rectangular frame (32) to reciprocate, the rectangular frame (32) drives the sawtooth bar (27) to reciprocate, the sawtooth bar (27) drives the connecting gear ring (26) to rotate forward and reverse, so that the plurality of paddles (12) The forward and reverse rotation prevents the mud paddle (12) from being stationary. When the mud paddle (12) is wide, more positions on the conveying filter belt (2) are not used, resulting in waste. When the mud paddle (12) is narrow, the mixed liquid ditch is narrow, affecting the water flow rate of the conveying filter belt (2). At the same time, it can prevent the ditch from always being in the same position. In the late stage of transmission, the water flow rate at the ditch is low. Since the diameters of the two adjacent connecting gear rings (26) are different, the rotation angles of the multiple mud paddles (12) are different, which can change the ditch at all times and the water flow rate at each moment is the best. e. The sludge concentrated by the conveyor filter belt (2) is conveyed to the filter press equipment, where the sludge is gradually squeezed to achieve the maximum separation of mud and water, and finally forms a filter cake for discharge.

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