Stepped precipitation and filtration system for silicon carbide-containing waste liquid

Abstract

The invention discloses a stepped precipitation and filtration system for waste liquid containing silicon carbide, and relates to the technical field of dental comprehensive treatment machines. Comprising an adjusting tank with one side provided with a coarse filter, one side of the adjusting tank is fixedly connected with a settling tank, one side of the settling tank is provided with a driving motor, the power output end of the driving motor is fixedly connected with a plurality of centrifugal blades, a settling area is formed in the settling tank, one side of the settling area is provided with a sewage collecting groove, and one side of the sewage collecting groove is fixedly connected with a side filter plate. A lifting plate is slidably connected in the sewage collecting tank, one end of the lifting plate is fixedly connected with a reset assembly, a trigger groove is formed in one side of the lifting plate, a transmission belt is slidably connected in the settling tank, and a limiting groove and a storage groove are formed in one side of the transmission belt; flocculate is pushed to the side filter plate through the centrifugal blades to be filtered and concentrated, and then the flocculate in water is cleaned and recycled through the lifting plate moving up and down and the sewage pump, so that the situation that the flocculate blocks a pipeline and influences the wastewater treatment efficiency due to long-time use is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of treatment of waste liquid containing silicon carbide, and in particular to a cascade precipitation and filtration system for waste liquid containing silicon carbide. Background Art

[0002] Silicon carbide is a common material widely used in electronics, petrochemical, metallurgy and other industries. During the production and use process, the wastewater generated contains high concentrations of organic matter, heavy metals and other pollutants. If not treated, these wastewaters will have a serious impact on the environment and ecology; silicon carbide particles in wastewater are generally treated by flocculation treatment method for precipitation and filtration, but after a long period of flocculation and sedimentation, sludge accumulation will affect the normal suction of treated water.

[0003] After searching, the Chinese patent publication number CN2808530U discloses a precipitation and neutralization treatment system for silicon carbide production wastewater, including an acidic wastewater pool, an alkaline wastewater pool and a reaction pool, the reaction pool is connected to the precipitation device, a control system is set on one side of the reaction pool, a discharge pipe I and a discharge pipe II are respectively set below the alkaline wastewater pool and the acidic wastewater pool, a stop valve I is set at the lower end of the discharge pipe I, and a stop valve II is set at the lower end of the discharge pipe II, a pH detection device is set in the reaction pool, and a pH adjustment device is set on one side of the reaction pool, and the pH adjustment device is connected to the control system. The above patent lacks the function of quickly and centrally discharging the sludge appearing in the precipitation during the operation of the device, which will affect the sewage treatment efficiency after long-term use and cause the problem of shutdown and cleaning. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a cascade sedimentation and filtration system for waste liquid containing silicon carbide.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A cascade sedimentation and filtration system for waste liquid containing silicon carbide comprises a regulating pool with a coarse filter installed on one side, a sedimentation tank is fixedly connected to one side of the regulating pool, a driving motor is installed on one side of the sedimentation tank, a plurality of centrifugal blades are fixedly connected to the power output end of the driving motor, a sedimentation area is opened inside the sedimentation tank, a sewage collecting tank is opened on one side of the sedimentation area, a side filter plate is fixedly connected to one side of the sewage collecting tank, a lifting plate is slidably connected inside the sewage collecting tank, a reset assembly is fixedly connected to one end of the lifting plate, a triggering groove is opened on one side of the lifting plate, a transmission belt is slidably connected inside the sedimentation tank, a limiting groove and a receiving groove are opened on one side of the transmission belt, a lifting boss is slidably connected to one end of the receiving groove, a spring three is fixedly connected to the lifting boss and one end of the receiving groove, and a trigger rod is fixedly connected to the inner side of the top of the sedimentation tank.

[0007] Preferably: the reset assembly includes a reset rope, a rope reel and a spring, one end of the rope reel is rotatably connected to the inside of the sedimentation tank, both ends of the spring are respectively fixedly connected to the rope reel and the sedimentation tank, one end of the rope reel is fixedly connected to the reset rope, and one end of the reset rope is fixedly connected to the lower side of the lifting plate.

[0008] Further: the power output end of the driving motor is fixedly connected with a synchronous wheel 1, a reducer component is fixedly connected to one side of the sedimentation tank, the power output end of the reducer component is transmission-connected to the transmission belt, the power input end of the reducer component is fixedly connected with a crown gear 1, one end of the sedimentation tank is rotationally connected with a crown gear 2, one end of the crown gear 2 is meshed with the crown gear 1, a synchronous wheel 2 is fixedly connected above the water hole, and one end of the synchronous wheel 2 and the synchronous wheel 1 are transmission-connected by a synchronous belt.

[0009] Furthermore: a drug inlet pipe and a liquid inlet pipe are fixedly connected to the top of the sedimentation tank, a plurality of water holes are opened on one side of the sedimentation area, a dirt collecting baffle is fixedly connected to one side of the sedimentation area, and a baffle top groove is opened above the dirt collecting baffle.

[0010] As a preferred solution of the present invention: a sewage pump is fixedly connected to one side of the sedimentation tank, and a sewage pipe is fixedly connected to one end of the sewage pump.

[0011] As a further solution of the present invention: one end of the lifting plate is fixedly connected to a sludge baffle, one side of the lifting plate is rotatably connected to a sludge scraper, and a second spring is fixedly connected to the sludge scraper and one end of the lifting plate.

[0012] As a further solution of the present invention: a suction pipe is fixedly connected to the bottom of the sedimentation tank, one end of the suction pipe is fixedly connected to a suction filter plate, and a bottom scraper is fixedly connected to the power output end of the driving motor.

[0013] On the basis of the above scheme: one end of the suction pipe is fixedly connected to the oxidation tank, and one end of the oxidation tank is fixedly connected to the membrane filter.

[0014] On the basis of the above-mentioned solution: an air pump is fixedly connected to the bottom of the sedimentation tank, and an air injection pipe is fixedly connected to one end of the air pump.

[0015] On the basis of the above-mentioned solution: one end of the air jet pipe is fixedly connected with an air flotation nozzle, and one end of the air flotation nozzle is fixedly connected to the inside of the sedimentation area.

[0016] The beneficial effects of the present invention are:

[0017] 1. A cascade sedimentation and filtration system for waste liquid containing silicon carbide, which pushes floccules to the side filter plates for filtration and concentration through centrifugal blades, and then cleans and recovers the floccules in the water through the lifting plates and sewage pumps that move up and down, to prevent the floccules from clogging the pipelines and affecting the wastewater treatment efficiency due to long-term use.

[0018] 2. A cascade sedimentation and filtration system for waste liquid containing silicon carbide, which can drive the rope reel to flip and retract the rope through a spring to reset the lifting plate, return to the bottom of the sewage collection tank and wait for the next lifting, and can quickly and repeatedly recover the flocculants in a centralized manner, thereby improving the collection efficiency.

[0019] 3. A cascade sedimentation and filtration system for waste liquid containing silicon carbide, in which the sludge scraper can be restricted by the boss on one side of the lifting plate when moving upward and cannot continue to rotate, so that the sludge can be scraped upward, and when moving downward, the sludge scraper can rotate to prevent a large amount of sludge from being scraped downward.

[0020] 4. A cascade sedimentation and filtration system for waste liquid containing silicon carbide, wherein the bottom scraper can rotate with the driving motor to clean the suction filter plate above the suction pipe and push the sediment to the edge of the sedimentation area.

[0021] 5. A cascade sedimentation and filtration system for waste liquid containing silicon carbide, in which tiny bubbles are sprayed into the sedimentation tank through the air flotation nozzle by an air pump. After adhering to the flocculants, they can help the flocculants float up, reducing the flocculants in the water and facilitating their recovery by the sewage pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the main structure of a cascade sedimentation and filtration system for waste liquid containing silicon carbide proposed by the present invention;

[0023] Figure 2 It is a schematic cross-sectional structure diagram of a sedimentation tank of a cascade sedimentation and filtration system for waste liquid containing silicon carbide proposed by the present invention;

[0024] Figure 3 It is a schematic diagram of the upper structure of a sedimentation tank of a cascade sedimentation and filtration system for waste liquid containing silicon carbide proposed by the present invention;

[0025] Figure 4 It is a schematic diagram of the upper side view of a sedimentation tank of a cascade sedimentation and filtration system for waste liquid containing silicon carbide proposed by the present invention;

[0026] Figure 5 It is a schematic diagram of the lower side structure of a sedimentation tank of a cascade sedimentation and filtration system for waste liquid containing silicon carbide proposed by the present invention;

[0027] Figure 6 It is a schematic diagram of the local structure of the bottom of a sedimentation tank of a cascade sedimentation and filtration system for waste liquid containing silicon carbide proposed by the present invention;

[0028] Figure 7 It is a schematic diagram of the installation structure of a lifting plate of a cascade sedimentation and filtration system for waste liquid containing silicon carbide proposed by the present invention;

[0029] Figure 8It is a schematic diagram of the scraper installation structure of a cascade sedimentation and filtration system for waste liquid containing silicon carbide proposed by the present invention;

[0030] Fig. 9 It is a schematic diagram of the transmission belt installation structure of a cascade sedimentation and filtration system for waste liquid containing silicon carbide proposed by the present invention;

[0031] Fig.10 It is a schematic diagram of the installation structure of a lifting boss of a cascade sedimentation and filtration system for waste liquid containing silicon carbide proposed by the present invention;

[0032] Fig.11 The present invention provides a schematic diagram of the decomposition structure of a lifting boss of a stepped sedimentation and filtration system for waste liquid containing silicon carbide. Fig.12 It is a schematic diagram of the lifting rod installation structure of a cascade sedimentation and filtration system for waste liquid containing silicon carbide proposed by the present invention; Fig.13 It is a schematic diagram of the installation structure of the lower pressure plate of a cascade sedimentation and filtration system for waste liquid containing silicon carbide proposed by the present invention; Fig.14 The present invention provides a schematic diagram of the decomposition structure of a lifting boss of a stepped sedimentation and filtration system for waste liquid containing silicon carbide.

[0033] In the figure: 1, coarse filter; 2, regulating tank; 3, sedimentation tank; 4, oxidation tank; 5, membrane filter; 6, sedimentation area; 7, drug inlet pipe; 8, liquid inlet pipe; 9, drive motor; 10, sewage pump; 11, sewage collection tank; 12, side filter plate; 13, water hole; 14, centrifugal blade; 15, jet pipe; 16, air pump; 17, crown gear 1; 18, reducer component; 19, transmission belt; 20, sewage baffle; 21, sewage pipe; 22, trigger rod; 23 , baffle top groove; 24, suction pipe; 25, flotation nozzle; 26, suction filter plate; 27, bottom scraper; 28, lifting plate; 29, sludge baffle; 30, reset rope; 31, rope reel; 32, spring one; 33, sludge scraper; 34, spring two; 35, limit groove; 36, trigger groove; 37, lifting boss; 38, spring three; 39, storage groove; 40, synchronous wheel one; 41, synchronous belt; 42, synchronous wheel two; 43, crown gear two. DETAILED DESCRIPTION

[0034] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] Embodiment 1:

[0037] A cascade sedimentation and filtration system for waste liquid containing silicon carbide, such as Figure 1 - Fig.11 As shown, it includes a regulating tank 2 with a coarse filter 1 installed on one side, a sedimentation tank 3 is fixedly connected to one side of the regulating tank 2, a driving motor 9 is installed on one side of the sedimentation tank 3, a plurality of centrifugal blades 14 are fixedly connected to the power output end of the driving motor 9, a sedimentation area 6 is opened inside the sedimentation tank 3, a sewage collecting tank 11 is opened on one side of the sedimentation area 6, a side filter plate 12 is fixedly connected to one side of the sewage collecting tank 11, a lifting plate 28 is slidably connected inside the sewage collecting tank 11, a reset component is fixedly connected to one end of the lifting plate 28, a triggering groove 36 is opened on one side of the lifting plate 28, a transmission belt 19 is slidably connected inside the sedimentation tank 3, a limiting groove 35 and a receiving groove 39 are opened on one side of the transmission belt 19, a lifting boss 37 is slidably connected to one end of the receiving groove 39, a spring 38 is fixedly connected to one end of the lifting boss 37 and the receiving groove 39, and a trigger rod 22 is fixedly connected to the inner side of the top of the sedimentation tank 3;

[0038] The reset assembly includes a reset rope 30, a rope reel 31 and a spring 32. One end of the rope reel 31 is rotatably connected to the inside of the sedimentation tank 3. Both ends of the spring 32 are fixedly connected to the rope reel 31 and the sedimentation tank 3 respectively. One end of the rope reel 31 is fixedly connected to the reset rope 30. One end of the reset rope 30 is fixedly connected to the lower side of the lifting plate 28.

[0039] When the wastewater is treated, it is first filtered through a coarse filter 1 to remove large particles inside, and then the pH value of the wastewater is adjusted to alkaline in a regulating tank 2, preferably to 11. After 45 minutes, the wastewater is passed into a sedimentation tank 3 and a flocculant is added. The centrifugal blades 14 are driven by a driving motor 9 to rotate for mixed sedimentation. When the centrifugal blades 14 rotate, the precipitated floccules can be thrown out to the edge of the sedimentation area 6. At this time, the edge water flow carries the floccules through the side filter plate 12 on one side of the sewage collection tank 11, and the floccules are blocked by the side filter plate 12 to reduce the precipitated floccules in the water.

[0040] When the driving motor 9 is working, it can drive the transmission belt 19 on one side to rotate. During the rotation of the transmission belt 19, when the lifting boss 37 on one side rotates to the trigger groove 36 on the corresponding side of the lifting plate 28, the lifting boss 37 is inserted into the trigger groove 36 under the pressure of the spring 38 to drive the lifting plate 28 to move upward, and the flocculants blocked on the side filter plate 12 are scraped off;

[0041] When the lifting plate 28 moves to the top, the lower inclined platform of the trigger rod 22 is inserted into the trigger groove 36 to squeeze the lifting boss 37 into the recovery groove 39 and separate the lifting plate 28. Then, the lifting plate 28 returns to the bottom of the sewage collecting tank 11 under the action of the reset assembly and waits for the next lifting.

[0042] The spring 1 32 can drive the rope reel 31 to flip and retract the rope to realize the reset of the lifting plate 28.

[0043] In order to solve the problem that the transmission belt 19 can rotate with the driving motor 9; Figure 1 - Fig.11 As shown, the power output end of the driving motor 9 is fixedly connected to a synchronous wheel 1 40, one side of the sedimentation tank 3 is fixedly connected to a reducer component 18, the power output end of the reducer component 18 is transmission-connected to a transmission belt 19, the power input end of the reducer component 18 is fixedly connected to a crown gear 17, one end of the sedimentation tank 3 is rotationally connected to a crown gear 2 43, one end of the crown gear 2 43 is meshed with the crown gear 17, a synchronous wheel 2 42 is fixedly connected above the water hole 13, and the synchronous wheel 2 42 and one end of the synchronous wheel 1 40 are transmission-connected through a synchronous belt 41;

[0044] When the driving motor 9 rotates, it can drive the reducer component 18 to rotate through two synchronous wheels and the crown gear. The reducer component 18 is preferably a gear reducer, which allows the transmission belt 19 to follow the driving motor 9 at a low speed.

[0045] like Figure 1 - Fig.11 As shown, the top of the sedimentation tank 3 is fixedly connected with a drug inlet pipe 7 and a liquid inlet pipe 8, a plurality of water holes 13 are opened on one side of the sedimentation area 6, a dirt collecting baffle 20 is fixedly connected to one side of the sedimentation area 6, a baffle top groove 23 is opened above the dirt collecting baffle 20, the drug inlet pipe 7 is connected to an external drug pump, the liquid inlet pipe 8 is connected to the water outlet of the regulating tank 2, and the dirt collecting baffle 20 can prevent the flocculants blocked by the side filter plate 12 from floating randomly;

[0046] A sewage pump 10 is fixedly connected to one side of the sedimentation tank 3, and a sewage pipe 21 is fixedly connected to one end of the sewage pump 10. The sewage pump 10 can extract flocs floating on the top and scraped on the top from the top to clean and remove the flocs in the water, which is convenient for recycling and processing while facilitating the suction of the remaining water, reducing the maintenance and shutdown cleaning of the device.

[0047] In order to solve the problem of preventing the lifting plate 28 from scraping off the sludge when it is reset; Figure 1 - Fig.11 As shown, one end of the lifting plate 28 is fixedly connected to a sludge baffle 29, one side of the lifting plate 28 is rotatably connected to a sludge scraper 33, and a spring 2 34 is fixedly connected to the sludge scraper 33 and one end of the lifting plate 28;

[0048] When the sludge scraper 33 moves upward, it can be restricted by the boss on one side of the lifting plate 28 and cannot continue to rotate, so it can scrape the sludge and move upward. When it moves downward, the sludge scraper 33 can rotate to prevent scraping a large amount of sludge downward.

[0049] In order to solve the problem of transferring wastewater after sedimentation treatment to subsequent processes; Figure 1 - Fig.11 As shown, a suction pipe 24 is fixedly connected to the bottom of the sedimentation tank 3, one end of the suction pipe 24 is fixedly connected to a suction filter plate 26, a bottom scraper 27 is fixedly connected to the power output end of the driving motor 9, one end of the suction pipe 24 is fixedly connected to an oxidation tank 4, and one end of the oxidation tank 4 is fixedly connected to a membrane filter 5;

[0050] The suction pipe 24 transfers the wastewater after sedimentation treatment to the oxidation tank 4 for oxidation disinfection, and then filters it through the membrane filter 5 to meet the discharge standard. The bottom scraper 27 can rotate with the drive motor 9 to clean the suction filter plate 26 above the suction pipe 24 and push the sediment to the edge of the sedimentation area 6.

[0051] When the present embodiment is used, the wastewater is firstly filtered through the coarse filter 1 to filter the internal bulk particles when being treated, and then the pH value of the wastewater is adjusted to alkaline in the regulating tank 2, preferably the pH value is 11, and after 45 minutes, the wastewater is passed into the sedimentation tank 3 and the flocculant is added, and the centrifugal blades 14 are driven by the driving motor 9 to rotate for mixed sedimentation. When the centrifugal blades 14 rotate, the precipitated floccules can be thrown out to the edge of the sedimentation area 6, and at this time, the edge water flow carries the floccules through the side filter plate 12 on one side of the sewage collection tank 11, and the floccules are blocked by the side filter plate 12 to reduce the precipitated floccules in the water;

[0052] When the driving motor 9 is working, it can drive the transmission belt 19 on one side to rotate. During the rotation of the transmission belt 19, when the lifting boss 37 on one side rotates to the trigger groove 36 on the corresponding side of the lifting plate 28, the lifting boss 37 is inserted into the trigger groove 36 under the pressure of the spring 38 to drive the lifting plate 28 to move upward, and the flocculants blocked on the side filter plate 12 are scraped off;

[0053] When the lifting plate 28 moves to the top, the lower inclined platform of the trigger rod 22 is inserted into the trigger groove 36 to squeeze the lifting boss 37 into the recovery groove 39 and separate the lifting plate 28. Then, the lifting plate 28 returns to the bottom of the sewage collecting tank 11 under the action of the reset assembly and waits for the next lifting.

[0054] The spring 1 32 can drive the rope reel 31 to flip and retract the rope to realize the reset of the lifting plate 28;

[0055] When the driving motor 9 rotates, it can drive the reducer component 18 to rotate through two synchronous wheels and the crown gear. The reducer component 18 is preferably a gear reducer, which allows the transmission belt 19 to follow the driving motor 9 at a low speed.

[0056] The medicine inlet pipe 7 is connected to the external medicine pump, the liquid inlet pipe 8 is connected to the water outlet of the regulating tank 2, the sewage baffle 20 can prevent the floccules blocked by the side filter plate 12 from floating randomly, and the sewage pump 10 can extract the floccules floating on the top and scraped on the top from the top to clean and remove the floccules in the water, which is convenient for recycling and processing while facilitating the suction of the remaining water, reducing the maintenance and shutdown cleaning of the device;

[0057] When the sludge scraper 33 moves upward, it can be restricted by the boss on one side of the lifting plate 28 and cannot continue to rotate, so it can scrape the sludge upward. When it moves downward, the sludge scraper 33 can rotate to prevent scraping a large amount of sludge downward.

[0058] The suction pipe 24 transfers the wastewater after sedimentation treatment to the oxidation tank 4 for oxidation disinfection, and then filters it through the membrane filter 5 to meet the discharge standard. The bottom scraper 27 can rotate with the drive motor 9 to clean the suction filter plate 26 above the suction pipe 24 and push the sediment to the edge of the sedimentation area 6.

[0059] Embodiment 2:

[0060] A cascade sedimentation and filtration system for waste liquid containing silicon carbide, such as Figure 1 - Fig.11 As shown, in order to solve the problem of making the flocculants float to facilitate the cleaning of the sewage pump 10; this embodiment makes the following improvements on the basis of embodiment 1: an air pump 16 is fixedly connected to the bottom of the sedimentation tank 3, and an air injection pipe 15 is fixedly connected to one end of the air pump 16;

[0061] One end of the air jet pipe 15 is fixedly connected to an air flotation nozzle 25, and one end of the air flotation nozzle 25 is fixedly connected to the inside of the sedimentation area 6;

[0062] The air pump 16 sprays tiny bubbles into the sedimentation tank 3 through the air flotation nozzle 25 , and the tiny bubbles adhere to the flocs to help the flocs float, thereby reducing the flocs in the water and facilitating the recovery by the sewage pump 10 .

[0063] The above is a preferred specific implementation manner of the present invention, and the protection scope of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by any technician familiar with the field within the technical scope disclosed by the present invention in combination with the prior art or public common sense, within the spirit and principle of the present invention, shall be covered by the protection scope of the present invention.

Claims

1. A cascade sedimentation and filtration system for waste liquid containing silicon carbide, comprising a regulating tank (2) with a coarse filter (1) installed on one side, characterized in that: A sedimentation tank (3) is fixedly connected to one side of the regulating tank (2), a driving motor (9) is installed on one side of the sedimentation tank (3), a plurality of centrifugal blades (14) are fixedly connected to the power output end of the driving motor (9), a sedimentation area (6) is opened inside the sedimentation tank (3), a sewage collection tank (11) is opened on one side of the sedimentation area (6), a side filter plate (12) is fixedly connected to one side of the sewage collection tank (11), a lifting plate (28) is slidably connected inside the sewage collection tank (11), and the lifting plate (28) A reset assembly is fixedly connected at one end, a trigger groove (36) is provided at one side of the lifting plate (28), a transmission belt (19) is slidably connected inside the sedimentation tank (3), a limit groove (35) and a receiving groove (39) are provided at one side of the transmission belt (19), a lifting boss (37) is slidably connected at one end of the receiving groove (39), a spring three (38) is fixedly connected at one end of the lifting boss (37) and the receiving groove (39), and a trigger rod (22) is fixedly connected to the inner side of the top of the sedimentation tank (3).

2. A cascade sedimentation and filtration system for silicon carbide-containing waste liquid according to claim 1, characterized in that: The reset assembly comprises a reset rope (30), a rope reel (31) and a spring (32); one end of the rope reel (31) is rotatably connected to the inside of the sedimentation tank (3); two ends of the spring (32) are respectively fixedly connected to the rope reel (31) and the sedimentation tank (3); one end of the rope reel (31) is fixedly connected to the reset rope (30); and one end of the reset rope (30) is fixedly connected to the lower side of the lifting plate (28).

3. A cascade sedimentation and filtration system for waste liquid containing silicon carbide according to claim 2, characterized in that: The power output end of the driving motor (9) is fixedly connected to a synchronous wheel 1 (40), one side of the sedimentation tank (3) is fixedly connected to a reducer component (18), the power output end of the reducer component (18) is transmission-connected to a transmission belt (19), the power input end of the reducer component (18) is fixedly connected to a crown gear 1 (17), one end of the sedimentation tank (3) is rotationally connected to a crown gear 2 (43), one end of the crown gear 2 (43) is meshed with the crown gear 1 (17), a synchronous wheel 2 (42) is fixedly connected above the water hole (13), and the synchronous wheel 2 (42) and one end of the synchronous wheel 1 (40) are transmission-connected via a synchronous belt (41).

4. A cascade sedimentation and filtration system for silicon carbide-containing waste liquid according to claim 3, characterized in that: The top of the sedimentation tank (3) is fixedly connected to a medicine inlet pipe (7) and a liquid inlet pipe (8); one side of the sedimentation area (6) is provided with a plurality of water holes (13); one side of the sedimentation area (6) is fixedly connected to a dirt collecting baffle (20); and a baffle top groove (23) is provided above the dirt collecting baffle (20).

5. A cascade sedimentation and filtration system for waste liquid containing silicon carbide according to claim 4, characterized in that: A sewage pump (10) is fixedly connected to one side of the sedimentation tank (3), and a sewage pipe (21) is fixedly connected to one end of the sewage pump (10).

6. The cascade sedimentation and filtration system for silicon carbide-containing wastewater according to claim 1, characterized in that: One end of the lifting plate (28) is fixedly connected to a sludge baffle (29), one side of the lifting plate (28) is rotatably connected to a sludge scraper (33), and the sludge scraper (33) and one end of the lifting plate (28) are fixedly connected to a second spring (34).

7. A cascade sedimentation and filtration system for waste liquid containing silicon carbide according to claim 6, characterized in that: A suction pipe (24) is fixedly connected to the bottom of the sedimentation tank (3), one end of the suction pipe (24) is fixedly connected to a suction filter plate (26), and a bottom scraper (27) is fixedly connected to the power output end of the drive motor (9).

8. The cascade sedimentation and filtration system for silicon carbide-containing wastewater according to claim 7, characterized in that: One end of the suction pipe (24) is fixedly connected to an oxidation tank (4), and one end of the oxidation tank (4) is fixedly connected to a membrane filter (5).

9. The cascade sedimentation and filtration system for silicon carbide-containing wastewater according to claim 7, characterized in that: An air pump (16) is fixedly connected to the bottom of the precipitation tank (3), and an air injection pipe (15) is fixedly connected to one end of the air pump (16).

10. The cascade sedimentation and filtration system for silicon carbide-containing wastewater according to claim 9, characterized in that: One end of the air jet pipe (15) is fixedly connected to an air flotation nozzle (25), and one end of the air flotation nozzle (25) is fixedly connected to the inside of the sedimentation area (6).

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