Wastewater treatment device and method thereof

Abstract

The invention relates to the technical field of wastewater treatment, and in particular to a wastewater treatment device, comprising: an enclosure pool, a purification pool is arranged inside the enclosure pool, a plurality of releasers are installed on the inner bottom of the purification pool, the releasers are connected to an external dissolved gas tank, and a receiving space is reserved between the enclosure pool and the purification pool; a rotating part that can rotate along the outer wall of the top of the enclosure pool, a plurality of collecting parts are hinged on the rotating part in a vertical direction, the collecting part has a collecting end partially immersed under the wastewater liquid surface in the purification pool, and the collecting part can introduce the collected scum into the receiving space when moving in the hinge stroke; the collecting part and its collecting end can scan and collect the wastewater liquid surface in the purification pool, and the scanning area is an annular range; a dispenser, the dispenser can input a coagulant into the purification pool, and the invention can not only perform multi-stage purification treatment on the wastewater, but also improve the purification efficiency by improving the stability of bubbles.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and in particular to a wastewater treatment device and a method thereof. Background Art

[0002] In industrial papermaking, bleaching wastewater, condensation wastewater, pulping wastewater and papermaking white water are produced. Among them, papermaking white water refers to the wastewater discharged from the papermaking machine, which contains solid suspended matter such as fibers, fillers and coatings, as well as other soluble substances.

[0003] In the prior art, papermaking white water is generally treated by sedimentation, in which the suspended matter is coagulated to form large-particle flocs, which are then treated by sedimentation. However, the efficiency and treatment intensity are poor, and residues are easily left, which affects the operation of subsequent reverse osmosis components and causes blockage of the osmosis membrane. Summary of the invention

[0004] The present invention provides a wastewater treatment device and method thereof, which can not only perform multi-stage purification treatment on wastewater, but also improve the purification efficiency by enhancing the stability of bubbles.

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

[0006] A wastewater treatment device, comprising:

[0007] An enclosed pool, wherein a purification pool is arranged inside the enclosed pool, a plurality of releasers are installed at the inner bottom of the purification pool, and the releasers are connected to the external dissolved gas tank, and a receiving space is reserved between the enclosed pool and the purification pool;

[0008] A rotating part that can rotate along the outer wall of the top of the enclosed pool, wherein a plurality of collecting parts are hingedly connected to the rotating part in the vertical direction, wherein the collecting part has a collecting end that is partially immersed below the wastewater level in the purification pool, and the collecting part can guide the collected scum into the receiving space when moving in the hinge stroke;

[0009] The collection unit and its collection end can scan and collect the wastewater level in the purification tank, and the scanning area is a ring range;

[0010] A dispenser is provided, wherein the dispenser can input a coagulant aid into the purification tank.

[0011] Optionally, a plurality of limit seats are installed on the enclosed pool, a plurality of assembly blocks are slidably installed on the limit seats in the vertical direction, a plurality of brackets corresponding to the limit seats are hinged on the top of the rotating part, the top of the collecting part is fixedly connected to the free end of the bracket, a connecting rod is hinged between the assembly block and the bracket, when the assembly block is at the lowest point, the collecting end of the collecting part can be kept horizontal and partially immersed under the liquid surface, and when the assembly block moves upward, the collecting part can be tilted to move the scum;

[0012] The wastewater treatment device also includes a driver for controlling the up and down displacement of the assembly block.

[0013] Optionally, a collecting cavity is designed inside the collecting part, the collecting part is designed on the radial line of the purification pool, the inner wall of the collecting cavity is designed with hydrophobic holes, the outer wall of the collecting part is also designed with an extension channel connected to the inside of the collecting cavity, and the extension channel is connected to the receiving space.

[0014] Optionally, a delivery space is formed between the free ends of the plurality of collecting parts, and the delivery device is located in the delivery space;

[0015] The dispenser includes an assembly rod fixedly installed at the bottom of the purification tank, the top of the assembly rod is higher than the wastewater level, a storage cylinder is installed on the top of the assembly rod, and coagulant or flocculation powder is stored inside the storage cylinder. A ring-shaped array of powder dropping holes is opened at the bottom of the storage cylinder, and a disc plate is rotatably installed at the bottom of the storage cylinder. The disc plate is provided with docking holes corresponding to the powder dropping holes one by one. When the docking holes are connected with the powder dropping holes, a dispensing relationship can be formed, and the rotation of the disc plate can interrupt the dispensing relationship.

[0016] Optionally, a bubble stabilizing tube is fixedly installed on the bottom of the disc plate, and a plurality of energy absorbing leaves are installed on the outer wall of the bubble stabilizing tube. A buffer hole is opened on the outer wall of the bubble stabilizing tube between any two adjacent energy absorbing leaves. The liquid flow caused by the rotation of the collecting part along the outer wall of the enclosed pool can drive the bubble stabilizing tube to rotate through the energy absorbing leaves. The assembly rod is also designed with a slot for installing a stirring blade.

[0017] Optionally, the driver includes a reciprocating screw rotatably mounted on a limit seat, the assembly block is threadedly connected to the outer wall of the reciprocating screw, a driven gear is fixedly mounted on the bottom of the reciprocating screw, an internal gear is fixedly mounted on the inner wall of the enclosed pool, the driven gear and the internal gear form a meshing relationship, and when the rotating part rotates, the driven gear can be driven to rotate along the inner wall of the enclosed pool through the internal gear.

[0018] Optionally, a servo motor is installed on the top of the enclosed pool, and a transmission part is installed on the output end of the servo motor through a reducer. The rotating part has a transmission connection relationship with the outer wall of the transmission part, and the transmission part can control the rotation of the rotating part.

[0019] Optionally, a water filter plate is fixedly installed inside the receiving space, and the water filter plate can block the scum. The water filter plate divides the receiving space into a slag storage chamber and a water collecting chamber, and the outer wall of the enclosed pool is provided with a material chamber connected to the slag storage chamber.

[0020] Optionally, the wastewater treatment device further includes a reverse osmosis component, which includes a reaction box, an osmotic membrane is installed inside the reaction box, and a pipeline is connected between the top of the reaction box and the inside of the enclosed pool.

[0021] A method for treating wastewater, comprising the following steps:

[0022] S1, the dissolved air tank and the releaser work and release air bubbles to the bottom of the purification tank. The air bubbles adhere to the fibers, fillers and other suspended matter in the papermaking white water to form a gas-solid composite. Since the density is less than that of water, it floats to the water surface to form scum;

[0023] S2, the driver works to make the collection part work, collect the scum on the surface of the wastewater in the purification tank and introduce it into the receiving space;

[0024] S3, while the driver is working, the dispenser inputs coagulant or flocculant into the purification tank to improve the coagulation effect and increase the surface tension and foam stability of papermaking white water;

[0025] S4, the bubble stabilizing tube and the energy absorbing blade rotate to dissipate the energy of the liquid surface fluctuation caused by the collecting part, so as to keep the liquid surface stable.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. By using the cooperation of the dissolved air tank and the releaser, bubbles can be released to the bottom of the liquid surface in the purification tank. The bubbles adhere to the fibers, fillers and other suspended matter in the papermaking white water to form a gas-solid composite. Since the density is less than that of water, it floats to the water surface to form scum. The collection part in the present invention can scan and collect the wastewater liquid surface and transfer the scum to the receiving space.

[0028] 2. The input of coagulant or coagulant aid into the wastewater by the dispenser can make tiny fillers, colloidal substances and some soluble organic matter form larger floccules, which is helpful for bubble adhesion and improves the efficiency and effect of flotation separation. The presence of these colloidal substances and some soluble organic matter will increase the turbidity and color of the wastewater, and at the same time affect the surface tension and foam stability of the wastewater. Therefore, the present invention can improve the purification efficiency by enhancing the stability of the bubbles. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure of the wastewater treatment device of the present invention;

[0030] Figure 2 For the present invention Figure 1 Right view of;

[0031] Figure 3 For the present invention Figure 2 The schematic diagram of the structure is a cross-section at AA in the middle;

[0032] Figure 4 It is a schematic diagram of the structure inside the enclosure pool and the purification pool in the present invention;

[0033] Figure 5 It is a structural display diagram of some parts in the present invention;

[0034] Figure 6 It is a schematic diagram of the separation of the enclosed pool and the rotating part in the present invention;

[0035] Figure 7 It is a schematic diagram of the structure of the reverse osmosis component and purification tank in the present invention.

[0036] In the figure: 1. enclosure pool; 2. purification pool; 3. rotating part; 4. collection part; 5. collection chamber; 6. bracket; 7. connecting rod; 8. reciprocating screw; 9. assembly block; 11. driven gear; 12. assembly rod; 13. storage cylinder; 14. bubble stabilizing cylinder; 15. energy absorbing leaf; 16. internal gear; 17. extension channel; 18. reaction box; 19. permeable membrane; 21. pipeline; 22. transmission part; 23. disc plate. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figures 1 to 7 The present invention provides a technical solution: a wastewater treatment device, comprising:

[0039] An enclosure pool 1 is provided with a purification pool 2 inside the enclosure pool 1, and a plurality of releasers are installed at the inner bottom of the purification pool 2, which are connected to an external dissolved air tank, and a receiving space is reserved between the enclosure pool 1 and the purification pool 2; a rotating part 3 can rotate along the outer wall of the top of the enclosure pool 1, and a plurality of collecting parts 4 are hinged on the rotating part 3 in a vertical direction, and the collecting part 4 has a collecting end partially immersed under the wastewater liquid level in the purification pool 2, and the collecting part 4 can introduce the collected scum into the receiving space when moving in the hinge stroke; the collecting part 4 and its collecting end can scan and collect the wastewater liquid level in the purification pool 2, and the scanning area is a ring range; a dispenser, and the dispenser can input a coagulant into the purification pool 2.

[0040] Specifically, papermaking white water includes not only fibers, fillers and other suspended matter, but also smaller colloidal substances and some soluble organic matter. In the present invention, by utilizing the cooperation of the air dissolving tank and the releaser, bubbles can be released to the bottom of the liquid surface in the purification tank 2. The bubbles adhere to the fibers, fillers and other suspended matter in the papermaking white water to form a gas-solid composite. Since the density is less than that of water, the gas-solid composite floats to the water surface to form scum. The collecting unit 4 in the present invention can scan and collect the wastewater liquid surface, transfer the scum to the receiving space, and clean it in time to prevent the scum from affecting the work of the bubbles.

[0041] Secondly, the injector inputs coagulant or coagulant aid into the wastewater, which can make tiny fillers, colloidal substances and some soluble organic matter form larger floccules, which is helpful for bubble adhesion and improves the efficiency and effect of flotation separation. The presence of these colloidal substances and some soluble organic matter will increase the turbidity and chromaticity of the wastewater, and at the same time affect the surface tension and foam stability of the wastewater. Therefore, the present invention can not only perform multi-stage purification treatment on the wastewater, but also improve the purification efficiency by enhancing the stability of the bubbles.

[0042] Among them, a more preferred embodiment is that a plurality of limit seats are installed on the enclosed pool 1, and a plurality of assembly blocks 9 are slidably installed on the limit seats in the vertical direction. The top of the rotating part 3 is hinged with a plurality of brackets 6 corresponding to the limit seats, the top of the collecting part 4 is fixedly connected to the free end of the bracket 6, and a connecting rod 7 is hinged between the assembly block 9 and the bracket 6. When the assembly block 9 is at the lowest point, the collecting end of the collecting part 4 can remain horizontal and partially immersed in the liquid surface. When the assembly block 9 moves up, the collecting part 4 can be tilted to move the scum. The wastewater treatment device also includes a driver for controlling the up and down displacement of the assembly block 9.

[0043] See also Figures 3 to 5In this embodiment, through the cooperation between the bracket 6, the assembly block 9 and the connecting rod 7, the up and down displacement of the assembly block 9 can be used to control the collection part 4 to swing in the vertical direction, and the rotating part 3 also controls the collection part 4 and the bracket 6 to rotate along the outer wall of the purification tank 2, so that the scum on the wastewater surface can be continuously salvaged and collected, and the scum can be collected and transferred.

[0044] Furthermore, a collecting cavity 5 is designed inside the collecting part 4, and the collecting part 4 is designed on the radial line of the purification pool 2. A hydrophobic hole is designed on the inner wall of the collecting cavity 5, and an extension channel 17 connected to the inside of the collecting cavity 5 is also designed on the outer wall of the collecting part 4. The extension channel 17 is connected to the receiving space, please refer to Figure 5 In this embodiment, since the collecting part 4 is designed on the radial line of the purification tank 2, the rotation of the collecting part 4 can form a circular scanning interval, thereby improving the scanning range. Through the cooperation of multiple collecting parts 4, they can effectively work alternately to improve the efficiency of scum collection. Secondly, by designing the extended channel 17, when the collecting part 4 is displaced in the vertical direction, the collecting part 4 can be in an inclined state, thereby forming a height difference, so that the scum inside the collecting chamber 5 is transferred to the receiving space using the height potential energy.

[0045] Among them, a more preferred embodiment is that a delivery space is formed between the free ends of the multiple collecting parts 4, and the dispenser is located in the delivery space; the dispenser includes an assembly rod 12 fixedly installed at the bottom of the purification tank 2, the top of the assembly rod 12 is higher than the wastewater level, a storage cylinder 13 is installed on the top of the assembly rod 12, and the storage cylinder 13 stores coagulant or flocculation powder inside, and a ring array of powder dropping holes is opened at the bottom of the storage cylinder 13. A disc plate 23 is rotatably installed at the bottom of the storage cylinder 13, and docking holes corresponding to the powder dropping holes are opened on the disc plate 23. When the docking holes are connected to the powder dropping holes, a delivery relationship can be formed, and the rotation of the disc plate 23 can interrupt the delivery relationship.

[0046] See also Figure 3 And its detailed enlarged view, in this embodiment, the space released by the free ends of multiple collecting parts 4 is used as the delivery area, which can avoid interference between delivery and scum collection. Secondly, the central area of ​​the purification tank 2 is the delivery space, and the liquid surface flow caused by the collection part 4 when working can disperse the delivered coagulant, etc.

[0047] In this embodiment, the output of the coagulant aid can be achieved by rotating the disc plate 23 through the cooperation between the docking hole and the powder falling hole.

[0048] Furthermore, a bubble stabilizing tube 14 is fixedly installed at the bottom of the disc plate 23, and a plurality of energy-absorbing leaves 15 are installed on the outer wall of the bubble stabilizing tube 14. A buffer hole is opened on the outer wall of the bubble stabilizing tube 14 between any two adjacent energy-absorbing leaves 15. The liquid flow caused by the rotation of the collecting part 4 along the outer wall of the enclosed pool 1 can drive the bubble stabilizing tube 14 to rotate through the energy-absorbing leaves 15. The assembly rod 12 is also designed with a slot for installing stirring blades. The stirring blades can be supplemented later through the preset slots to improve the mixing efficiency. In this embodiment, the water waves generated by the collecting part 4 will collide with the outer wall of the bubble stabilizing tube 14. The annular design of the bubble stabilizing tube 14 and the cooperation of the buffer holes can consume the energy of the water waves and at the same time make the bubble stabilizing tube 14 rotate, that is, the disc plate 23 can be rotated, thereby realizing intermittent delivery. The energy absorption capacity of the bubble stabilizing tube 14 can be improved by designing the energy-absorbing leaves 15.

[0049] In a more preferred embodiment, the driver includes a reciprocating screw 8 rotatably mounted on a limit seat, an assembly block 9 is threadedly connected to the outer wall of the reciprocating screw 8, a driven gear 11 is fixedly mounted on the bottom of the reciprocating screw 8, an internal gear 16 is fixedly mounted on the inner wall of the enclosure pool 1, and the driven gear 11 and the internal gear 16 form a meshing relationship. When the rotating part 3 rotates, the driven gear 11 can be driven to rotate along the inner wall of the enclosure pool 1 through the internal gear 16. Please refer to Figure 3 As shown in the enlarged detail diagram, due to the vertical limitation of the assembly block 9 by the limit seat, when the reciprocating screw 8 continues to rotate, the assembly block 9 will move back and forth on the outer wall of the reciprocating screw 8, so that the collecting part 4 can continuously swing in the vertical direction. The collecting part 4 does not swing on a fixed axis, but on a moving axis, which can quickly increase the angle to form high potential energy.

[0050] Furthermore, a servo motor is installed on the top of the enclosed pool 1, and a transmission part 22 is installed on the output end of the servo motor through a reducer. The rotating part 3 has a transmission connection relationship with the outer wall of the transmission part 22, and the transmission part 22 can control the rotation of the rotating part 3. In this embodiment, the rotating part 3 and the transmission part 22 can have a friction transmission relationship, a belt transmission relationship, or a meshing relationship, which can be selected according to actual usage.

[0051] Furthermore, a water filter plate is fixedly installed inside the receiving space, and the water filter plate can block the scum. The water filter plate divides the receiving space into a slag storage chamber and a water collecting chamber. The outer wall of the enclosure pool 1 is provided with a material chamber connected to the slag storage chamber.

[0052] Furthermore, the wastewater treatment device also includes a reverse osmosis component, which includes a reaction box 18 , an osmotic membrane 19 is installed inside the reaction box 18 , and a pipe 21 is connected between the top of the reaction box 18 and the inside of the enclosure pool 1 .

[0053] The device utilizes the above structures to not only perform multi-stage purification on wastewater, but also improve the purification efficiency by enhancing the stability of bubbles.

[0054] A method for treating wastewater, comprising the following steps:

[0055] S1, the air dissolving tank and the releaser work and release air bubbles to the bottom of the purification tank 2, and the air bubbles adhere to the fibers, fillers and other suspended matter in the papermaking white water to form an air-solid composite. Since the density is less than that of water, it floats to the water surface to form scum;

[0056] S2, the driver works to make the collecting part 4 work, collect the scum on the surface of the wastewater in the purification tank 2 and introduce it into the receiving space;

[0057] S3, while the driver is working, the dispenser inputs a coagulant or flocculant into the purification tank 2 to improve the coagulation effect and increase the surface tension and foam stability of the papermaking white water;

[0058] S4, the bubble stabilizing tube 14 and the energy absorbing blades 15 rotate to dissipate the energy of the liquid level fluctuation caused by the collecting part 4, so as to keep the liquid level stable.

[0059] The wastewater treatment method is simple and efficient, and can improve the efficiency and quality of purification treatment by increasing the surface tension and foam stability of the wastewater.

[0060] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural components recorded in the specification and the drawings can also be directly processed according to the existing technical common sense without any doubt. At the same time, the connection method of each component adopts the mature conventional means in the prior art, and the machinery, parts and equipment all adopt the conventional models in the prior art, so no specific description will be given here.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wastewater treatment device, characterized in that: include: An enclosed pool (1), wherein a purification pool (2) is arranged inside the enclosed pool (1), a plurality of releasers are installed at the inner bottom of the purification pool (2), and the releasers are connected to an external dissolved gas tank, and a receiving space is reserved between the enclosed pool (1) and the purification pool (2); A rotating part (3) rotates along the outer wall of the top of the enclosed pool (1), and a plurality of collecting parts (4) are hingedly connected to the rotating part (3) in a vertical direction. The collecting parts (4) have a collecting end partially immersed below the wastewater level in the purification pool (2), and the collecting parts (4) guide the collected scum into the receiving space when moving in the hinge stroke; The collecting part (4) and its collecting end work to scan and collect the wastewater liquid level in the purification tank (2), and the scanning area is a circular range; A dispenser, which inputs a coagulant into the purification tank (2); A plurality of limit seats are installed on the enclosed pool (1), and a plurality of assembly blocks (9) are slidably installed on the limit seats in a vertical direction. A plurality of brackets (6) corresponding to the limit seats are hingedly connected at the top of the rotating part (3). The top of the collecting part (4) is fixedly connected to the free end of the bracket (6). A connecting rod (7) is hingedly connected between the assembly block (9) and the bracket (6). When the assembly block (9) is at the lowest point, the collecting end of the collecting part (4) remains horizontal and partially immersed under the liquid surface. When the assembly block (9) moves upward, the collecting part (4) can be tilted to move the scum. The wastewater treatment device also includes a driver for controlling the up and down displacement of the assembly block (9).

2. The wastewater treatment device according to claim 1, characterized in that: The collecting portion (4) is internally provided with a collecting cavity (5), the collecting portion (4) is designed on the radial line of the purification pool (2), the inner wall of the collecting cavity (5) is provided with a hydrophobic hole, the outer wall of the collecting portion (4) is also provided with an extension channel (17) communicating with the interior of the collecting cavity (5), and the extension channel (17) is communicated with the receiving space.

3. The wastewater treatment device according to claim 1, characterized in that: A delivery space is formed between the free ends of the plurality of collecting parts (4), and the delivery device is located in the delivery space; The dispenser comprises an assembly rod (12) fixedly mounted on the bottom of the purification tank (2), the top of the assembly rod (12) being higher than the wastewater level, a storage cylinder (13) being mounted on the top of the assembly rod (12), a coagulant or flocculating powder being stored inside the storage cylinder (13), a powder dropping hole in an annular array being provided at the bottom of the storage cylinder (13), a disc plate (23) being rotatably mounted at the bottom of the storage cylinder (13), docking holes being provided on the disc plate (23) corresponding to the powder dropping holes one by one, a dispensing relationship being formed when the docking holes are connected to the powder dropping holes, and the dispensing relationship being interrupted when the disc plate (23) is rotated.

4. The wastewater treatment device according to claim 3, characterized in that: A bubble stabilizing tube (14) is fixedly mounted on the bottom of the disc plate (23), and a plurality of energy absorbing leaves (15) are mounted on the outer wall of the bubble stabilizing tube (14). A buffer hole is provided on the outer wall of the bubble stabilizing tube (14) between any two adjacent energy absorbing leaves (15). The liquid flow caused by the collection portion (4) rotating along the outer wall of the enclosed pool (1) drives the bubble stabilizing tube (14) to rotate through the energy absorbing leaves (15). The assembly rod (12) is also designed with a slot for mounting a stirring leaf.

5. The wastewater treatment device according to claim 1, characterized in that: The driver comprises a reciprocating screw (8) rotatably mounted on a limit seat, the assembly block (9) is threadedly connected to the outer wall of the reciprocating screw (8), a driven gear (11) is fixedly mounted on the bottom of the reciprocating screw (8), an internal gear (16) is fixedly mounted on the inner wall of the enclosure pool (1), the driven gear (11) and the internal gear (16) form a meshing relationship, and when the rotating part (3) rotates, the driven gear (11) is driven to rotate along the inner wall of the enclosure pool (1) through the internal gear (16).

6. The wastewater treatment device according to claim 5, characterized in that: A servo motor is installed on the top of the enclosed pool (1); a transmission part (22) is installed at the output end of the servo motor via a reducer; the rotating part (3) and the outer wall of the transmission part (22) are in a transmission connection relationship; and the transmission part (22) controls the rotation of the rotating part (3).

7. The wastewater treatment device according to claim 2, characterized in that: A water filter plate is fixedly installed inside the receiving space, the water filter plate blocks the floating scum, and the water filter plate divides the receiving space into a slag storage chamber and a water collection chamber. The outer wall of the enclosure pool (1) is provided with a material chamber connected to the slag storage chamber.

8. The wastewater treatment device according to any one of claims 1 to 7, characterized in that: The wastewater treatment device further comprises a reverse osmosis component, the reverse osmosis component comprising a reaction box (18), an osmotic membrane (19) being installed inside the reaction box (18), and a pipe (21) being connected between the top of the reaction box (18) and the inside of the enclosure pool (1).

9. A method for treating wastewater, characterized in that: The wastewater treatment device as claimed in claim 4 comprises the following steps: S1, the air dissolving tank and the releaser work and release air bubbles to the bottom of the purification tank (2), and the air bubbles adhere to the fibers, fillers and other suspended matter in the papermaking white water to form an air-solid composite. Since the density is less than that of water, it floats to the water surface to form scum; S2, the driver operates to make the collecting unit (4) operate to collect the scum on the surface of the wastewater in the purification tank (2) and introduce it into the receiving space; S3, while the driver is working, the dispenser inputs a coagulant or flocculant into the purification tank (2) to improve the coagulation effect and increase the surface tension and foam stability of the papermaking white water; S4, the bubble stabilizing cylinder (14) and the energy absorbing blades (15) rotate to dissipate the energy of the liquid surface fluctuation caused by the collecting portion (4), thereby maintaining the stability of the liquid surface.

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