Environment-friendly treatment equipment for papermaking wastewater

Abstract

The invention relates to the technical field of papermaking wastewater treatment, and provides papermaking wastewater environment-friendly treatment equipment which comprises an air floatation tank, a fixing frame, an aeration mechanism, a supporting frame, a primary filtering mechanism and a secondary filtering mechanism, the aeration mechanism and the supporting frame are oppositely arranged, and the aeration mechanism is used for introducing gas into wastewater in the air floatation tank; the primary filtering mechanism and the secondary filtering mechanism are both rotationally arranged on the supporting frame, the secondary filtering mechanism is arranged on the primary filtering mechanism in a sleeving mode, the primary filtering mechanism is used for filtering waste water conveyed into the air floatation tank, and the secondary filtering mechanism is used for filtering foam on the liquid level in the air floatation tank; according to the technical scheme, the equipment for treating the papermaking wastewater is used for solving the problem that in the prior art, the size of impurities treated by equipment cards for treating the papermaking wastewater is relatively single.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of manufacturing of special equipment for environmental protection, such as water pollution, solid waste pollution, air pollution, heavy metal pollution, nuclear pollution prevention, and more particularly to the field of papermaking wastewater treatment, and specifically to a papermaking wastewater environmental treatment equipment. BACKGROUND

[0002] A large amount of wastewater is generated in various links of the papermaking process. When treating wastewater, a combination of multiple technologies is usually required to ensure that fibers, ink, bacteria, and other substances in the wastewater are removed. The wastewater treatment process typically involves multiple processes, such as grating, sedimentation, filtration, air flotation, flocculation, and biological treatment.

[0003] Currently, the wastewater treatment process involves passing the wastewater through multiple devices in sequence. For example, the wastewater is filtered for coarse fibers in a rotating screen separator, then allowed to settle before being treated in an air flotation machine. The two processes sequentially collect and filter coarse fibers and suspended solids. However, the independent operation of multiple devices has the problems of large floor area, difficult maintenance, and limited range of impurities that each device can handle. Therefore, there is a need for a wastewater treatment device that can handle a wider range of particle sizes of impurities during the wastewater treatment process. SUMMARY

[0004] The present application provides a papermaking wastewater environmental treatment equipment to solve the problem of the single size of impurities treated by the existing papermaking wastewater treatment equipment.

[0005] The technical solution of the present application is as follows: The utility model provides a kind of papermaking wastewater environmental protection treatment equipment, including air floatation pond, fixed frame, air burst mechanism, support frame, primary filter mechanism and secondary filter mechanism, air floatation pond is set as annular, the bottom of air floatation pond is set as inclined, sludge pipe is opened in the bottom of air floatation pond lowest, the central portion of air floatation pond is provided with clean water cavity and delivery through cavity, clean water cavity is annular and is set on delivery through cavity, fixed frame is rotatably connected on clean water cavity and delivery through cavity, fixed frame is fixedly connected air burst mechanism and support frame on, air burst mechanism and support frame are oppositely arranged, support frame is provided with primary filter mechanism and secondary filter mechanism, air burst mechanism, primary filter mechanism and secondary filter mechanism are all communicated with delivery through cavity, air burst mechanism is used to pass into gas in wastewater in air floatation pond, primary filter mechanism and secondary filter mechanism are rotatably arranged on support frame, secondary filter mechanism is set on primary filter mechanism, primary filter mechanism is used to filter wastewater that is delivered to air floatation pond, secondary filter mechanism is used to filter foam on liquid surface in air floatation pond, wastewater is treated after primary filter mechanism again through air floatation pond, then again filtered in secondary filter mechanism.

[0006] The end of support frame away from fixed frame is provided with support wheel, support wheel is in contact with the edge of air floatation pond, and primary filter mechanism and secondary filter mechanism are fixedly connected with support wheel, primary filter mechanism and secondary filter mechanism are rotated when support wheel rotates.

[0007] Support frame is provided with feed pipe, cleaning pipe, impurity discharge pipe and limit wheel, feed pipe is arranged in primary filter mechanism, feed pipe is used to deliver wastewater for filtering, two cleaning pipes are arranged, and two cleaning pipes are arranged between primary filter mechanism and secondary filter mechanism, two impurity discharge pipes are arranged, impurity discharge pipe, feed pipe and cleaning pipe are all extended into delivery through cavity, multiple limit wheels are arranged, and multiple limit wheels are rotatably connected on support frame, and multiple limit wheels support primary filter mechanism and secondary filter mechanism respectively.

[0008] Primary filter mechanism includes primary filter barrel and impurity collection groove one, primary filter barrel is rotatably connected on support frame, feed pipe is extended into primary filter barrel, multiple liquid outlets are opened below feed pipe, primary filter barrel is fixedly connected with support wheel, impurity collection groove one is fixedly connected on support frame, impurity collection groove one is arranged on the upper side in primary filter barrel, and impurity collection groove one is communicated with one of impurity discharge pipes.

[0009] The secondary filtering mechanism comprises secondary filtering barrels, a second impurity collecting groove and scraper sleeves, the secondary filtering barrels are provided in two, the two secondary filtering barrels are sleeved on the primary filtering barrel, the secondary filtering barrels are fixedly connected with the supporting wheel, the second impurity collecting groove is fixedly connected on the supporting frame, the second impurity collecting groove is arranged on the upper side in the primary filtering barrel, the second impurity collecting groove is communicated with one of the impurity discharge pipes, and the scraper sleeves are provided in multiple, each of the secondary filtering barrels is fixedly sleeved with multiple scraper sleeves.

[0010] A gap is left between the two secondary filtering barrels, the scraper sleeves are conical, one side of the scraper sleeves is provided with an opening one, when the scraper sleeves rotate with the secondary filtering barrels, the opening one can extend into the foam below the surface of the wastewater in the air flotation tank, the foam is collected into the scraper sleeves, an opening two is arranged on the side of the scraper sleeve away from the opening one, and the opening two is arranged on the side of the secondary filtering barrel.

[0011] The supporting frame is arranged in an inclined manner, one end of the supporting frame provided with the supporting wheel is higher than the end fixedly connected with the fixed frame, and the opening two is arranged on the side of the secondary filtering barrel away from the fixed frame.

[0012] The air explosion mechanism comprises a gas guide pipe, an aeration pipe, a motor and a water pumping pipe, the gas guide pipe is fixedly connected on the fixed frame, the gas guide pipe is communicated with the conveying cavity, the aeration pipes are provided in multiple, the aeration pipes are fixedly connected on the gas guide pipe, the aeration pipes extend into the air flotation tank, the motor is fixedly installed on the gas guide pipe, a driving wheel is fixedly connected on the output end of the motor, the driving wheel is in contact with the edge of the air flotation tank, the water pumping pipe is fixedly connected on the fixed frame close to the water pumping pipe, and the water pumping pipe is communicated with the clean water cavity.

[0013] The working principle and beneficial effects of the present application are as follows: 1. In the present application, the aeration mechanism is arranged opposite to the supporting frame, the coarse fibers in the wastewater need to be stationary after being filtered, the aeration effect can be improved, after the wastewater is filtered by the primary filtering mechanism and enters the air flotation tank, the wastewater is relatively stable when the fixed frame slowly rotates to drive the aeration mechanism to the position where the wastewater is added, and the aeration is facilitated. 2. In the present application, the secondary filtering mechanism is sleeved on the primary filtering mechanism, after the wastewater is filtered by the primary filtering mechanism to remove coarse fibers, the wastewater is treated by aeration in the air flotation tank, and then the wastewater is filtered by the secondary filtering mechanism to remove foam, and the wastewater can be treated by aeration in the air flotation tank again, so that the wastewater is filtered multiple times in the equipment. 3、The aeration mechanism is arranged to carry out aeration on the wastewater, and the wastewater is kept in a static state through the opposite arrangement of the support frame, the foam obtained through aeration can be collected and filtered through the secondary filtering mechanism, the coarse fibers in the wastewater can be filtered through the primary filtering mechanism, and the efficiency of wastewater treatment is improved through the rotation of the primary filtering mechanism and the secondary filtering mechanism at the same time to complete twice filtering, and the two impurities are filtered and separated at one time. BRIEF DESCRIPTION OF DRAWINGS

[0014] The application will be further described in detail below in combination with the drawings and specific embodiments.

[0015] Figure 1 It is a schematic view of the overall structure of the application; Figure 2 It is another view of the overall structure of the application; Figure 3 It is a schematic view of the local structure of the conveying cavity of the application; Figure 4 It is a schematic view of the local structure of the cooperation of the support frame and the secondary filtering mechanism of the application; Figure 5 It is a schematic view of the local internal cross-sectional structure of the cooperation of the primary filtering mechanism and the secondary filtering mechanism of the application; Figure 6 It is a schematic view of the local internal cross-sectional structure of the primary filtering barrel of the application; Figure 7 It is a schematic view of the local structure of the support wheel of the application; Figure 8 It is a schematic view of the cooperation structure of the feeding pipe, the cleaning pipe and the impurity discharge pipe of the application.

[0016] In the figure: 1, air flotation tank; 2, clean water cavity; 3, conveying cavity; 4, fixed frame; 5, support frame; 6, support wheel; 7, feeding pipe; 8, cleaning pipe; 9, impurity discharge pipe; 10, limiting wheel; 11, primary filtering barrel; 12, impurity collection groove one; 13, secondary filtering barrel; 14, impurity collection groove two; 15, scraper sleeve; 16, opening one; 17, opening two; 18, air guide pipe; 19, aeration pipe; 20, motor; 21, water suction pipe. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the application will be clearly and completely described below in combination with the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments of the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application. EMBODIMENT

[0018] As Figures 1-7 shown, the papermaking wastewater treatment of the embodiment belongs to the manufacturing of environmental protection special equipment for water pollution, solid waste pollution, air pollution, heavy metal pollution, nuclear pollution prevention, etc. A papermaking wastewater environmental protection treatment equipment is proposed, which comprises a gas floatation tank 1, a fixing frame 4, a gas explosion mechanism, a supporting frame 5, a primary filtering mechanism and a secondary filtering mechanism. The gas floatation tank 1 is arranged in an annular shape, and the bottom of the gas floatation tank 1 is arranged in an inclined shape. A sludge pipe is arranged at the lowest part of the bottom of the gas floatation tank 1. A clean water cavity 2 and a conveying cavity 3 are arranged in the center of the gas floatation tank 1. The clean water cavity 2 is arranged in an annular shape on the conveying cavity 3. The fixing frame 4 is rotatably connected to the clean water cavity 2 and the conveying cavity 3. The gas explosion mechanism and the supporting frame 5 are fixedly connected to the fixing frame 4. The gas explosion mechanism and the supporting frame 5 are arranged in opposite directions. The primary filtering mechanism and the secondary filtering mechanism are arranged on the supporting frame 5. The gas explosion mechanism, the primary filtering mechanism and the secondary filtering mechanism are all connected to the conveying cavity 3. The gas explosion mechanism is used to introduce gas into the wastewater in the gas floatation tank 1. The primary filtering mechanism and the secondary filtering mechanism are both rotatably arranged on the supporting frame 5. The secondary filtering mechanism is arranged on the primary filtering mechanism. The primary filtering mechanism is used to filter the wastewater conveyed into the gas floatation tank 1. The secondary filtering mechanism is used to filter the foam on the liquid surface in the gas floatation tank 1. The wastewater is treated again in the gas floatation tank 1 after the primary filtering mechanism, and then filtered in the secondary filtering mechanism. In the present application, the wastewater is introduced into the primary filtering mechanism to filter coarse fibers. At the same time, the filtered wastewater is introduced into the gas floatation tank 1 to perform air floatation. The fine fibers in the wastewater float on the surface of the wastewater to form foam, which is then filtered in the secondary filtering mechanism to separate the foam from the wastewater treated by air floatation. When the supporting frame 5 on the gas floatation tank 1 rotates with the fixing frame 4, the wastewater is introduced into the gas floatation tank 1 after primary filtering. Then, as the wastewater gradually stabilizes, the gas explosion mechanism performs aeration on the wastewater to make the fine fibers float with the bubbles. The wastewater treated by air floatation is separated from the clean water cavity 2 through the water pump 21 at the middle layer position of the gas floatation tank 1. The movement simultaneously completes the filtering of coarse fibers and fine fibers, reduces the floor area of the equipment, and completes the filtering of two kinds of impurities through one equipment.

[0019] As Figures 4-6As shown, the support frame 5 is provided with a support wheel 6 away from the fixed frame 4, the support wheel 6 is in contact with the edge of the air floatation tank 1, and the primary filter mechanism and the secondary filter mechanism are fixedly connected with the support wheel 6, when the support wheel 6 rotates, the primary filter mechanism and the secondary filter mechanism are rotated, a slot is arranged on the edge of the air floatation tank 1, which can improve the friction between the support wheel 6 and the edge of the air floatation tank 1, when the output end of the motor 20 drives the driving wheel to rotate, the driving wheel drives the air guide pipe 18 to move on the edge of the air floatation tank 1, thereby making the fixed frame 4 rotate, at the same time, the support wheel 6 also rotates on the edge of the air floatation tank 1, the air floatation tank 1 drives the primary filter barrel 11 and the secondary filter barrel 13 to rotate, at the same time of rotating, the wastewater is filtered, in actual use, a support wheel 6 with smaller diameter can be used according to the situation, the smaller diameter of the support wheel 6 can make the rotation speed of the primary filter barrel 11 and the secondary filter barrel 13 faster.

[0020] As shown in Figures 1-5 The support frame 5 is provided with a feeding pipe 7, a cleaning pipe 8, an impurity discharge pipe 9 and a limiting wheel 10, the feeding pipe 7 is arranged in the primary filter mechanism, the feeding pipe 7 conveys the wastewater to be filtered, the cleaning pipe 8 is provided with two, the two cleaning pipes 8 are arranged between the primary filter mechanism and the secondary filter mechanism, the impurity discharge pipe 9 is provided with two, the impurity discharge pipe 9, the feeding pipe 7 and the cleaning pipe 8 all extend into the conveying cavity 3, the limiting wheel 10 is provided with multiple, the multiple limiting wheels 10 are all rotationally connected on the support frame 5, the multiple limiting wheels 10 respectively support the primary filter mechanism and the secondary filter mechanism, the multiple limiting wheels 10 arranged on the support frame 5 support the primary filter barrel 11 and the secondary filter barrel 13 to rotate, the cleaning pipe 8 is provided with multiple nozzles, the two cleaning pipes 8 respectively clean the impurities on the primary filter barrel 11 and the secondary filter barrel 13, which is convenient for continuous use.

[0021] As shown in Figures 4-6As shown, the primary filtering mechanism includes a primary filtering barrel 11 and a impurity collection groove 12, the primary filtering barrel 11 is rotatably connected to the support frame 5, the feed pipe 7 extends into the primary filtering barrel 11, a plurality of liquid outlets are formed below the feed pipe 7, the primary filtering barrel 11 is fixedly connected with the support wheel 6, the impurity collection groove 12 is fixedly connected to the support frame 5, the impurity collection groove 12 is arranged on the upper side in the primary filtering barrel 11, the impurity collection groove 12 is communicated with one of the impurity discharge pipes 9, the cleaning pipe 8 is between the primary filtering barrel 11 and the secondary filtering barrel 13, the impurities filtered are washed by the nozzle on the back of the primary filtering barrel 11, so that the impurities flow into the impurity collection groove 12 and are discharged through the impurity discharge pipe 9, the feed pipe 7 passes the wastewater containing coarse fibers into the primary filtering barrel 11, the wastewater is filtered when the primary filtering barrel 11 rotates, the filtered wastewater flows into the secondary filtering barrel 13, and then enters the air flotation tank 1, and because the fine fibers in the wastewater not subjected to air flotation are not collected together, the wastewater can enter the air flotation tank 1 for treatment through the secondary filtering barrel 13.

[0022] As shown in the figure, Figures 4-6 As shown, the secondary filtering mechanism includes a secondary filtering barrel 13, an impurity collection groove 14 and a scraper sleeve 15, the secondary filtering barrel 13 is provided with two, the two secondary filtering barrels 13 are sleeved on the primary filtering barrel 11, the secondary filtering barrel 13 is fixedly connected with the support wheel 6, the impurity collection groove 14 is fixedly connected to the support frame 5, the impurity collection groove 14 is arranged on the upper side in the primary filtering barrel 11, the impurity collection groove 14 is communicated with one of the impurity discharge pipes 9, the scraper sleeve 15 is provided with a plurality of, a plurality of scraper sleeves 15 are fixedly sleeved on each secondary filtering barrel 13, four scraper sleeves 15 are arranged in the embodiment, the scraper sleeve 15 rotates to collect part of the wastewater and the foam on the surface of the wastewater into the secondary filtering barrel 13, and the wastewater mixed in the foam is filtered through the secondary filtering barrel 13, the filtered wastewater returns to the air flotation machine through the secondary filtering barrel 13, the cleaning pipe for cleaning the foam filtered in the secondary filtering barrel 13 is arranged on the side of the impurity collection groove 14, the foam is impacted in the secondary filtering barrel 13 through the nozzle to make the foam fall into the impurity collection groove 14 and be discharged through the impurity discharge pipe 9, in actual use, the foam on the surface of the wastewater in the air flotation tank 1 has low adhesion, and can be washed down by spraying water in the secondary filtering barrel 13.

[0023] As shown in the figure, Figures 1-6As shown, the two secondary filtering barrels 13 are spaced apart, the scraper sleeve 15 is tapered, one side of the scraper sleeve 15 is provided with an opening one 16, when the secondary filtering barrel 13 rotates, the opening one 16 can extend below the foam on the surface of the wastewater in the air flotation tank 1, collect the foam into the scraper sleeve 15, the scraper sleeve 15 is provided with an opening two 17 on the side away from the opening one 16, the opening two 17 is arranged on the side of the secondary filtering barrel 13, the support frame 5 is inclined, one end of the support frame 5 provided with the support wheel 6 is higher than the end fixedly connected with the fixed frame 4, the opening two 17 is arranged on the side of the secondary filtering barrel 13 away from the fixed frame 4, when the secondary filtering barrel 13 rotates, the opening one 16 scrapes the foam on the surface of the wastewater, collects the foam and part of the wastewater in the scraper sleeve 15, the scraper sleeve 15 is hollow, the wastewater and the foam flow to the opening two 17 in the scraper sleeve 15, when the opening two 17 rotates to the side close to the air flotation tank 1, that is, the lower side of the secondary filtering barrel 13, at this time, the foam is collected at the opening two 17, flows into the secondary filtering barrel 13 through the opening two 17, and flows into the secondary filtering barrel 13 due to the higher side, under the action of gravity, the wastewater and the foam flow into the secondary filtering barrel 13, and are filtered when the secondary filtering barrel 13 rotates, the wastewater passing through the secondary filtering barrel 13 returns to the air flotation tank 1 for air flotation treatment or is discharged into the clean water cavity 2.

[0024] As shown in the drawings, Figures 1-3 As shown, the air explosion mechanism includes a gas guide pipe 18, an aeration pipe 19, a motor 20 and a water suction pipe 21, the gas guide pipe 18 is fixedly connected to the fixed frame 4, the gas guide pipe 18 is communicated with the conveying cavity 3, the aeration pipe 19 is provided with a plurality of aeration pipes 19, the aeration pipes 19 are fixedly connected to the gas guide pipe 18, the aeration pipes 19 extend into the air flotation tank 1, the motor 20 is fixedly installed on the gas guide pipe 18, a driving wheel is fixedly connected to the output end of the motor 20, the driving wheel is in contact with the edge of the air flotation tank 1, the water suction pipe 21 is fixedly connected to the fixed frame 4 close to the water suction pipe 21, the water suction pipe 21 is communicated with the clean water cavity 2, a water suction pump can be arranged on the end of the water suction pipe 21 close to the clean water cavity 2, the water at the layer position in the air flotation tank 1 is separated and discharged, the bottom of the aeration pipe 19 is close to the higher side of the air flotation tank 1, during the rotation of the gas guide pipe 18, the sludge deposited at the bottom of the air flotation tank 1 is pushed to flow to the lower side of the air flotation tank 1, which is convenient for discharging the sludge, by arranging the aeration pipe 19 away from the support frame 5, when the wastewater flows into the air flotation tank 1 through the primary filtering barrel 11 to the position close to the clean water cavity 2, the wastewater is fluctuated, when the air explosion mechanism rotates to the position where the wastewater enters the air flotation tank 1, the wastewater is relatively more stable, at this time, the air explosion effect is better.

[0025] In this embodiment, the output end of the motor 20 drives the driving wheel to rotate, the driving wheel drives the fixed frame 4 to rotate on the edge of the air flotation tank 1, the supporting wheel 6 is in contact with the edge of the air flotation tank 1 to rotate, drives the primary filter barrel 11 and the secondary filter barrel 13 to rotate, the feed pipe 7 passes the wastewater into the primary filter barrel 11, the wastewater is filtered in the primary filter barrel 11, the cleaning pipe 8 cleans the impurities on the primary filter barrel 11, the impurities enter the impurity collection groove one 12 and are discharged through the impurity discharge pipe 9, the wastewater passing through the primary filter barrel 11 flows into the air flotation tank 1, the air guide pipe 18 passes the gas into the aeration pipe 19 to aerate, at the same time, the wastewater in the layer of the air flotation tank 1 is sucked through the water suction pipe 21, the secondary filter barrel 13 drives the scraper sleeve 15 to rotate when rotating, the opening one 16 collects the foam and the wastewater into the scraper sleeve 15, the foam flows into the secondary filter barrel 13 through the opening two 17 with the rotation of the scraper sleeve 15, the wastewater filtered through the secondary filter barrel 13 flows back to the air flotation tank 1, then the cleaning pipe 8 flushes the inner surface layer of the secondary filter barrel 13 through the side of the impurity collection groove two 14, the foam is collected in the impurity collection groove two 14 and is discharged through the impurity discharge pipe 9, and the pre-filtering and air flotation filtering are completed. Embodiment

[0026] The layout of the feed pipe 7, the cleaning pipe 8 and the impurity discharge pipe 9 in the conveying cavity 3 can refer to Figure 8 , the impurity discharge pipe 9 is arranged at the center of the feed pipe 7, the feed pipe 7 is in the center of the conveying cavity 3, the cleaning pipe 8 is arranged above the impurity discharge pipe 9, the feed pipe 7, the cleaning pipe 8 and the impurity discharge pipe 9 keep concentric rotation in the conveying cavity 3, both layout modes can meet the use, and can be used according to the site condition.

[0027] The above only describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An environmentally friendly wastewater treatment device for papermaking, characterized in that, Include: Air floatation tank (1) is provided as annular, bottom of air floatation tank (1) is provided as inclined, sludge pipe is opened at the bottom of air floatation tank (1) lowest, central air floatation tank (1) is provided with clean water cavity (2) and delivery through cavity (3), clean water cavity (2) is annular and is provided on delivery through cavity (3); Fixed frame (4) is rotatably connected on clean water cavity (2) and delivery through cavity (3), fixed frame (4) is fixedly connected with air burst mechanism and support frame (5), air burst mechanism and support frame (5) are oppositely arranged, support frame (5) is provided with primary filter mechanism and secondary filter mechanism, air burst mechanism, primary filter mechanism and secondary filter mechanism are all communicated with delivery through cavity (3), air burst mechanism is used to pass into gas in waste water in air floatation tank (1); Primary filter mechanism and secondary filter mechanism are rotatably arranged on support frame (5), secondary filter mechanism is provided on primary filter mechanism, primary filter mechanism is used to filter waste water delivered to air floatation tank (1), secondary filter mechanism is used to filter foam in liquid surface in air floatation tank (1), waste water is filtered after primary filter mechanism, then is treated in air floatation tank (1), then is filtered in secondary filter mechanism.

2. The papermaking wastewater environmental protection treatment equipment according to claim 1, characterized in that, Support frame (5) is provided with support wheel (6) on one end away from fixed frame (4), support wheel (6) is in contact with the edge of air floatation tank (1), and primary filter mechanism and secondary filter mechanism are all fixedly connected with support wheel (6), when support wheel (6) rotates, primary filter mechanism and secondary filter mechanism are all rotated.

3. The papermaking wastewater environmental protection treatment equipment according to claim 2, characterized in that, Support frame (5) is provided with: Feed pipe (7) is arranged in primary filter mechanism, feed pipe (7) is used to deliver waste water needing to be filtered; Two cleaning pipes (8) are arranged between primary filter mechanism and secondary filter mechanism; Two impurity discharge pipes (9) are arranged; Impurity discharge pipe (9), feed pipe (7) and cleaning pipe (8) all extend into delivery through cavity (3); Multiple limit wheels (10) are rotatably connected on support frame (5), and multiple limit wheels (10) are respectively used to support primary filter mechanism and secondary filter mechanism.

4. The papermaking wastewater environmental protection treatment equipment according to claim 3, characterized in that, Primary filter mechanism includes: Primary filter barrel (11) is rotatably connected on support frame (5), feed pipe (7) extends into primary filter barrel (11), multiple liquid outlets are opened below feed pipe (7), primary filter barrel (11) is fixedly connected with support wheel (6); Impurity collection groove one (12) is fixedly connected on support frame (5), impurity collection groove one (12) is arranged on the upper side in primary filter barrel (11), and impurity collection groove one (12) is communicated with one of impurity discharge pipes (9).

5. The papermaking wastewater environmental protection treatment equipment according to claim 4, characterized in that, The secondary filtering mechanism comprises: Two secondary filtering barrels (13) are arranged, and each of the two secondary filtering barrels (13) is sleeved on the primary filtering barrel (11), and the secondary filtering barrel (13) is fixedly connected with the supporting wheel (6); The impurity collecting groove two (14) is fixedly connected on the supporting frame (5), and the impurity collecting groove two (14) is arranged on the upper side in the primary filtering barrel (11), and the impurity collecting groove two (14) is communicated with one of the impurity discharge pipes (9); A plurality of scraper sleeves (15) are arranged, and each of the secondary filtering barrels (13) is fixedly sleeved with a plurality of scraper sleeves (15).

6. The papermaking wastewater environmental protection treatment equipment according to claim 5, characterized in that, The gap is left between the two secondary filtering barrels (13), the scraper sleeve (15) is arranged in a tapered shape, one side of the scraper sleeve (15) is provided with an opening one (16), when the scraper sleeve (15) rotates with the secondary filtering barrel (13), the opening one (16) can be extended into the foam below the surface of the wastewater in the air flotation tank (1), the foam is collected into the scraper sleeve (15), and an opening two (17) is arranged on the side of the scraper sleeve (15) away from the opening one (16).

7. The papermaking wastewater environmental protection treatment equipment according to claim 6, characterized in that, The supporting frame (5) is arranged in an inclined manner, one end of the supporting frame (5) provided with the supporting wheel (6) is higher than the end fixedly connected with the fixed frame (4), and the opening two (17) is arranged on the side of the secondary filtering barrel (13) away from the fixed frame (4).

8. The papermaking wastewater environmental protection treatment equipment according to claim 7, characterized in that, The air explosion mechanism comprises: The air guide pipe (18) is fixedly connected on the fixed frame (4), and the air guide pipe (18) is communicated with the conveying cavity (3); A plurality of aeration pipes (19) are arranged, the plurality of aeration pipes (19) are fixedly connected on the air guide pipe (18), and the aeration pipe (19) extends into the air flotation tank (1); The motor (20) is fixedly installed on the air guide pipe (18), the output end of the motor (20) is fixedly connected with a driving wheel, and the driving wheel is in contact with the edge of the air flotation tank (1); The water suction pipe (21) is fixedly connected on the fixed frame (4) near the water suction pipe (21), and the water suction pipe (21) is communicated with the clean water cavity (2).

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