Industrial wastewater treatment device and treatment method

Abstract

The invention relates to the field of wastewater treatment, and discloses an industrial wastewater treatment device and a treatment method.The industrial wastewater treatment device comprises a treatment box with an upward opening, and a filter cartridge is horizontally and rotationally arranged at the top of the treatment box; a liquid supply pipe and a scraping mechanism for scraping the inner peripheral wall of the filter cartridge are arranged in the filter cartridge; a stirring mechanism is arranged at the bottom in the treatment box and is used for treating filtrate of the filter cartridge; the stirring mechanism comprises a telescopic stirring piece, and spraying holes are formed in the telescopic stirring piece. Impurities on the inner wall of the filter cartridge are removed through the scraping plate, the outer wall of the filter cartridge is sprayed through the cleaning mechanism by means of spraying hole gas, the angle is adjusted along with an annular wave area, and impact vibration is achieved, so that blockage cleaning and continuous filtering of the filter cartridge are achieved, hot gas drives the telescopic stirring part to stretch out and draw back and spray gas, double stirring is formed, and the mixing degree and reaction efficiency of filtrate and chemicals are improved. Hot gas is secondarily used for outer wall air injection, viscous impurities can be softened, filtering holes are dried, the dredging rate is increased, and the filtering period is prolonged.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and more specifically, to an industrial wastewater treatment apparatus and treatment method. Background Technology

[0002] Industrial wastewater includes production wastewater, industrial sewage, and cooling water. It refers to the wastewater and waste liquid generated during industrial production processes. It contains industrial production materials, intermediate products, by-products, and pollutants generated during production that are lost with the water. Industrial wastewater is diverse and complex in composition. Because industrial wastewater often contains a variety of toxic substances, it pollutes the environment and poses a great threat to human health. Therefore, it is necessary to develop comprehensive utilization to turn harm into benefit. According to the composition and concentration of pollutants in the wastewater, appropriate purification measures should be taken for treatment before it can be discharged.

[0003] At the front end of industrial wastewater treatment, solid impurities are usually intercepted by filtration devices to create conditions for subsequent processes. However, the filter media is easily covered and clogged by pollutants during continuous operation, resulting in a decrease in throughput. The system can only be forced to stop for backwashing or manual cleaning, making it difficult to achieve continuous water intake and significantly reducing treatment efficiency. Summary of the Invention

[0004] This invention provides an industrial wastewater treatment device and method, solving the technical problem in related technologies where continuous filtration reduces wastewater treatment efficiency.

[0005] This invention provides an industrial wastewater treatment device, including a treatment tank with an upward opening, and a filter cylinder horizontally rotatably mounted on the top of the treatment tank; The filter cylinder is equipped with a liquid supply pipe and a scraping mechanism for scraping the inner circumferential wall of the filter cylinder. The bottom of the processing tank is equipped with a stirring mechanism to process the filtrate from the filter cartridge; The stirring mechanism includes a telescopic stirring component, and the telescopic stirring component is provided with a spray hole. When hot gas is introduced into the stirring mechanism, the telescopic stirring component extends and retracts to change its length and sprays air through the spray hole to assist stirring. The outer periphery of the filter cylinder forms an annular wave region, and the annular wave region is driven and coordinated with a cleaning mechanism. The cleaning mechanism is provided with a cleaning hole. The cleaning hole uses the gas ejected from the spray hole to spray air from the outer periphery of the filter cylinder to the inner periphery. As the filter cylinder rotates, the spray angle is adjusted. At the same time, the cleaning mechanism impacts the outer wall of the filter cylinder to perform vibration cleaning.

[0006] As a further optimization of the present invention, a partition plate is installed in the middle of the processing box, and a drain valve is provided at the bottom of the partition plate.

[0007] As a further optimization scheme of the present application, the scraping mechanism comprises a scraper and a guide shell, one end of the guide shell extends into the interior of the filter cartridge and is fixedly connected with the scraper, and the scraper is used for scraping the inner wall of the filter cartridge.

[0008] As a further optimization scheme of the present application, a gap exists between the scraper and the inner wall of the filter cartridge, and the scraper is arranged in an inclined and outward direction.

[0009] As a further optimization scheme of the present application, the stirring mechanism further comprises a rotating pipe and a driving member, the rotating pipe is arranged in rotation on the filter cartridge and is driven by the driving member, the rotating pipe is in communication with the telescopic stirring member, one end of the rotating pipe is closed, and the other end is provided for the hot gas.

[0010] As a further optimization scheme of the present application, the telescopic stirring member comprises a sleeve pipe, a moving pipe and a return spring, the sleeve pipe is in communication with the rotating pipe, the spray holes are arranged on the moving pipe and the sleeve pipe, one end of the moving pipe is closed, the other end is slidably inserted into the interior of the sleeve pipe, a spoiler is sleeved on the closed end of the moving pipe, the return spring is located in the interior of the sleeve pipe, one end of the return spring is fixedly connected with the rotating pipe, and the other end is fixedly connected with the inserted end of the moving pipe.

[0011] As a further optimization scheme of the present application, the driving member comprises a driving motor, and gears that are in transmission with each other are sleeved on the driving shaft of the rotating pipe and the driving motor.

[0012] As a further optimization scheme of the present application, the cleaning mechanism further comprises a rotating cleaning pipe, a communication pipe, a rotary joint and a return member, the cleaning holes are arranged on the rotating cleaning pipe, the rotating cleaning pipe is adapted to the annular wavy area and is connected with the return member, the communication pipe is sleeved on the partition plate, the gas sprayed out of the spray holes is collected at the gas inlet end of the communication pipe, and the gas outlet end is in communication with the rotating cleaning pipe through the rotary joint.

[0013] As a further optimization scheme of the present application, the return member comprises a sleeve, a return spring, an abutting rod and a bearing, one end of the abutting rod is rotatably connected with the rotating cleaning pipe through the bearing, the other end is slidably inserted into the interior of the sleeve and is connected with the sleeve through the return spring.

[0014] An industrial wastewater treatment method, which adopts the industrial wastewater treatment device, comprises the following steps: S1, liquid supply filtration: The liquid supply pipe sends the industrial wastewater into the interior of the filter cartridge, the filter cartridge is rotated for filtration, the filtrate finally falls to the bottom of the treatment box, the scraper scrapes off the impurities on the inner wall of the filter cartridge, and the impurities are discharged through the guide shell.

[0015] S2, stirring treatment: The driving member of the stirring mechanism is started, the rotating pipe drives the telescopic stirring member to rotate, hot gas is introduced to make the telescopic stirring member telescopically extend, and the jet hole sprays gas to assist stirring. S3, outer wall cleaning: The gas in the jet hole is sent to the rotating cleaning pipe through the communication pipe and the rotating joint, the rotating cleaning pipe is driven by the filter cartridge to adjust the jet angle, the gas is sprayed through the cleaning hole, and the filter cartridge intermittently impacts the cylinder wall to vibrate and clean the blockage. S4, liquid discharge: The treated liquid is discharged through the discharge valve.

[0016] The beneficial effects of the present application are: 1. The industrial wastewater treatment device disclosed by the present application realizes full-time cleaning of the filter cartridge through the cooperative cleaning of the inner wall scraping and the outer wall gas vibration, the scraper on the inner wall rotates with the filter cartridge, and the trapped solid impurities are scraped in real time and discharged through the material guide shell, so that the inner wall filter hole is prevented from being blocked, the cleaning mechanism at the outer wall sprays gas from the outer periphery to the inner periphery with the help of the gas in the jet hole, and the jet angle is adjusted with the filter cartridge annular wave area, and the vibration generated by the intermittent impact is combined to efficiently remove the blocked impurities on the outer wall and realize continuous filtration.

[0017] 2. The industrial wastewater treatment device disclosed by the present application, the rotating cleaning pipe of the cleaning mechanism is always attached to the annular wave area of the filter cartridge through the restoring member, when the filter cartridge rotates, the annular wave area drives the rotating cleaning pipe to automatically adjust the jet angle, so that the cleaning hole can cover all areas of the outer periphery of the filter cartridge, blind areas existing in the traditional fixed-angle cleaning are avoided, and the cleaning effect is improved.

[0018] 3. The industrial wastewater treatment device disclosed by the present application, the telescopic stirring member of the stirring mechanism can automatically telescopically extend under the drive of hot gas, and cooperates with the hot gas sprayed by the jet hole to form the double mixing effect of mechanical stirring and gas disturbance, the telescopic setting makes the stirring range cover the bottom of the treatment tank, the hot gas spraying not only can accelerate the convection of the filtrate, but also can improve the reaction temperature, so that the uniformity of the mixture of the filtrate and the reagent (such as flocculating agent, oxidizing agent) is improved, the reaction rate is accelerated, and finally the standard rate of purification indexes (such as COD, suspended solids) is improved.

[0019] 4、The industrial wastewater treatment device disclosed by the application, hot gas is introduced into the stirring mechanism, after the auxiliary stirring of the telescopic stirring part is driven, the incompletely consumed gas is collected through the communication pipe and transported to the cleaning mechanism for outer wall air injection to clean the blockage, the filter hole blockage of the filter cartridge is mainly viscous impurities (such as oil stains, gum, and small suspended matter agglomerates) in industrial wastewater, such impurities are easily attached to the inner wall of the filter hole at room temperature, and it is difficult to completely peel off by simply air injection at room temperature, when the heated gas is sprayed out through the cleaning hole, the high temperature can soften the viscous blockage and reduce the adhesion of the viscous blockage to the filter hole wall, and in cooperation with the impact force of the gas, the blockage can be quickly flushed out of the filter hole, compared with the air injection cleaning at room temperature, the filter hole unblocking rate is improved, the filtration flux is prevented from being reduced due to long-term accumulation of the blockage, meanwhile, the hot gas can dry the residual moisture in the filter hole, prevent the blockage from being re-bulked in a humid environment, and prolong the effective filtration period of the filter cartridge. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The overall structure schematic diagram of the industrial wastewater treatment device is provided for the application.

[0021] Figure 2 The internal structure schematic diagram of the industrial wastewater treatment device is provided for the application.

[0022] Figure 3 The structure schematic diagram of another view of the internal structure of the industrial wastewater treatment device is provided for the application.

[0023] Figure 4 The structure schematic diagram of the filter cartridge of the industrial wastewater treatment device is provided for the application.

[0024] Figure 5 The internal structure schematic diagram of the sleeve of the industrial wastewater treatment device is provided for the application.

[0025] Figure 6 The side view and sectional structure schematic diagram of the sleeve of the industrial wastewater treatment device is provided for the application.

[0026] In the drawing: 1, treatment box; 2, filter cartridge; 21, annular wave area; 3, liquid supply pipe; 4, scraping mechanism; 41, scraper; 42, material guide shell; 5, stirring mechanism; 501, spray hole; 51, rotating pipe; 52, sleeve; 53, moving pipe; 54, return spring; 55, driving motor; 56, gear; 57, spoiler; 58, rotating gas supply connector; 6, cleaning mechanism; 601, cleaning hole; 61, rotating cleaning tube; 62, sleeve; 63, return spring; 64, abutting rod; 65, bearing; 66, communication tube; 67, rotary joint; 7, partition plate; 8, liquid discharge valve; 9, discharge valve; 10, heating wire; 11, feeding valve. DETAILED DESCRIPTION

[0027] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that the discussion of these implementations is merely meant to provide a better understanding of the subject matter described herein and can be changed in function and arrangement without departing from the scope of the present description. Various examples can omit, substitute, or add various procedures or components as appropriate. Also, features described with respect to some examples can be combined in other examples.

[0028] Embodiment One As shown in Figures 1 to 3 , Figure 5 and Figure 6 , an industrial wastewater treatment device according to an embodiment of the present application includes a treatment tank 1 with an upwardly formed opening, a filter cylinder 2 horizontally rotatably arranged on the top of the treatment tank 1, a partition plate 7 arranged in the middle of the treatment tank 1, and a liquid discharge valve 8 arranged at the bottom of the partition plate 7. A feeding valve 11 is connected to one side of the treatment tank 1 to add required substances into the treatment tank 1. The filter cylinder 2 is internally provided with a liquid supply pipe 3 and a scraping mechanism 4 for scraping the inner circumferential wall of the filter cylinder 2. The bottom of the treatment tank 1 is provided with a stirring mechanism 5 for treating the filtrate of the filter cylinder 2. The stirring mechanism 5 includes an extendable and retractable stirring member, and a plurality of spray holes 501 are formed in the stirring member. When the stirring mechanism 5 is supplied with hot gas, the length of the stirring member is changed to spray the gas through the spray holes 501 to assist the stirring. The outer periphery of the filter cylinder 2 is formed with an annular wavy area 21, and the annular wavy area 21 is drivingly connected with a cleaning mechanism 6. The cleaning mechanism 6 is provided with a cleaning hole 601, and the gas sprayed through the spray holes 501 is sprayed from the outer periphery to the inner periphery of the filter cylinder 2. The filter cylinder 2 is rotated and the spray angle is adjusted, and at the same time, the cleaning mechanism 6 hits the outer wall of the filter cylinder 2 to vibrate and clean.

[0029] Industrial wastewater through the liquid supply pipe 3 into the rotating filter cartridge 2 inside, solid impurities are intercepted in the filter cartridge 2 inner wall, filtrate permeate through the filter cartridge 2 into the partition plate 7 above the area storage, scraping mechanism 4 scraping filter cartridge 2 inner wall impurities, in the partition plate 7 above the area storage of filtrate reaches the set amount, then through the drain valve 8 into the filter cartridge 2 bottom, filtrate into the processing tank 1 bottom, stirring mechanism 5 into hot gas, hot gas push telescopic stirring piece telescopic change length, at the same time from the jet hole 501 auxiliary stirring, improve the filtrate reaction efficiency, part of the gas jet hole 501 into the cleaning mechanism 6, filter cartridge 2 rotation, annular wave area 21 drive cleaning mechanism 6 adjustment cleaning hole 601 jet angle, make gas from the filter cartridge 2 periphery to the inner periphery of the jet, at the same time cleaning mechanism 6 impact filter cartridge 2 outer wall vibration, remove filter cartridge 2 filter hole clogging impurities.

[0030] Realize the filter, stirring, cleaning synchronization, without downtime, improve the continuity of wastewater treatment, telescopic stirring piece with jet stirring, expand the stirring range, enhance the mixing effect of filtrate and reagent, double cleaning ensure filter cartridge 2 flux stability, avoid the decline in processing efficiency.

[0031] As shown in Figure 2 and Figure 4 , the scraping mechanism 4 includes a scraper 41 and a guide shell 42, one end of the guide shell 42 extends into the inside of the filter cartridge 2, and is fixedly connected with the scraper 41, the scraper 41 is used for scraping the inner wall of the filter cartridge 2, the guide shell 42 is fixedly connected with the filter cartridge 2 through a mounting plate, there is a gap between the scraper 41 and the inner wall of the filter cartridge 2, and the scraper 41 is inclined outward.

[0032] During the rotation of the filter cartridge 2, the scraper 41 moves relative to the inner wall of the filter cartridge 2, and the solid impurities intercepted on the inner wall are scraped off, the scraped impurities fall into the guide shell 42 and are discharged outside the filter cartridge 2 along the inclined channel of the guide shell 42, realizing the collection and removal of the impurities, and the impurities on the inner wall of the filter cartridge 2 are removed in real time, preventing the impurities from accumulating and clogging the filter holes, and ensuring the stability of the filtration flux.

[0033] As shown in Figure 3 , the stirring mechanism 5 further includes a rotating pipe 51 and a driving member, the rotating pipe 51 is rotationally arranged on the filter cartridge 2 and is driven by the driving member, the rotating pipe 51 is in communication with the telescopic stirring piece, one end of the rotating pipe 51 is closed, and the other end is used for introducing hot gas.

[0034] The driving member is started, the driving member drives the rotating pipe 51 to rotate around its axis, the rotating pipe 51 in turn drives the telescopic stirring piece in communication therewith to rotate synchronously, and hot gas is introduced into the bottom end of the rotating pipe 51 through the rotating gas supply joint 58, the hot gas enters the inside of the telescopic stirring piece through the rotating pipe 51, drives the telescopic stirring piece to telescope, realizes dynamic adjustment of the stirring range, and expands the stirring coverage area, thereby improving the uniformity of the filtrate mixture.

[0035] As Figure 3 and Figure 6 shown, the telescopic stirring piece includes a sleeve 52, a moving tube 53 and a return spring 54, the sleeve 52 is communicated with the rotating tube 51, the jet holes 501 are arranged on the moving tube 53 and the sleeve 52, one end of the moving tube 53 is closed, the other end is slidably inserted into the inside of the sleeve 52, the moving tube 53 is sleeved with a spoiler 57 at the closed end, the return spring 54 is located in the inside of the sleeve 52, one end of the return spring 54 is fixed with the rotating tube 51, and the other end is fixed with the inserted end of the moving tube 53.

[0036] The hot gas enters the sleeve 52 through the rotating tube 51, pushes the moving tube 53 to slide to the outside of the sleeve 52 against the elastic force of the return spring 54, and extends the overall length of the telescopic stirring piece, when the hot gas pressure decreases, the return spring 54 resets to pull the moving tube 53 to retract into the sleeve 52, and shortens the length, during the telescopic process, the hot gas is sprayed from the jet holes 501, and cooperates with the rotation of the telescopic stirring piece to spray and stir the filtrate, and the spoiler 57 at the closed end of the moving tube 53 moves with the moving tube 53, further disturbs the liquid flow, and enhances the mixing effect.

[0037] The sliding cooperation of the sleeve 52 and the moving tube 53 realizes the length adjustment and expands the stirring range; the return spring 54 ensures that the telescopic stirring piece can be automatically reset, the jet gas of the jet holes 501 and the flow disturbance of the spoiler 57 have a double effect, greatly improves the mixing efficiency of the filtrate, and shortens the processing time.

[0038] The spoiler 57 at the closed end of the moving tube 53 rotates synchronously with the telescopic stirring piece, forms irregular vortexes in the filtrate, breaks the laminar flow state, expands the contact area of the medicament and the wastewater, avoids the problem of insufficient reaction caused by too high or too low local medicament concentration, further improves the purification effect, and the treatment effect of high-concentration industrial wastewater (such as chemical and dyeing wastewater) is more remarkable.

[0039] Specifically, the driving part includes a driving motor 55, and the rotating tube 51 and the driving shaft of the driving motor 55 are sleeved with gears 56 that transmit power to each other.

[0040] Starting the driving motor 55, the driving shaft of the driving motor 55 drives the gears 56 thereon to rotate, power is transmitted to the gears 56 on the rotating tube 51 through the meshing transmission of the gears 56, and then the rotating tube 51 is driven to rotate, and finally the rotation and stirring of the telescopic stirring piece are realized.

[0041] As Figures 3 to 5As shown, the cleaning mechanism 6 further comprises a rotating cleaning pipe 61, a communication pipe 66, a rotary joint 67 and a restoring member. The rotating cleaning pipe 61 is provided with a cleaning hole 601, and is matched with the annular wavy area 21 and connected with the restoring member. The communication pipe 66 is sleeved on the partition plate 7. The gas sprayed from the spray hole 501 is collected by the gas inlet end of the communication pipe 66, and is delivered to the rotary joint 67 through the communication pipe 66. The communication pipe 66 is internally provided with a heating wire 10. The gas is introduced into the rotating cleaning pipe 61 through the rotary joint 67. When the filter cartridge 2 rotates, the annular wavy area 21 acts on the rotating cleaning pipe 61 to move synchronously. The restoring member is matched with the rotating cleaning pipe 61 to press against the annular wavy area 21, so that the cleaning hole 601 continuously changes the spray direction with the rotation of the filter cartridge 2. The gas is sprayed from the cleaning hole 601 to clean the filter holes from the outer periphery to the inner periphery of the filter cartridge 2. Since the blown air is hot air, the cleaning effect is increased. At the same time, the rotating cleaning pipe 61 intermittently contacts and collides with the outer wall of the filter cartridge 2 in the movement.

[0042] The gas is collected by the gas inlet end of the communication pipe 66, and is delivered to the rotary joint 67 through the communication pipe 66. The communication pipe 66 is internally provided with a heating wire 10. The gas is introduced into the rotating cleaning pipe 61 through the rotary joint 67. When the filter cartridge 2 rotates, the annular wavy area 21 acts on the rotating cleaning pipe 61 to move synchronously. The restoring member is matched with the rotating cleaning pipe 61 to press against the annular wavy area 21, so that the cleaning hole 601 continuously changes the spray direction with the rotation of the filter cartridge 2. The gas is sprayed from the cleaning hole 601 to clean the filter holes from the outer periphery to the inner periphery of the filter cartridge 2. Since the blown air is hot air, the cleaning effect is increased. At the same time, the rotating cleaning pipe 61 intermittently contacts and collides with the outer wall of the filter cartridge 2 in the movement.

[0043] The communication pipe 66 and the rotary joint 67 are matched to realize stable delivery of the gas and flexible rotation of the rotating cleaning pipe 61. The restoring member ensures that the rotating cleaning pipe 61 is always attached to the annular wavy area 21, so as to ensure accurate adjustment of the spray angle. The combination of air jet cleaning and impact vibration can efficiently remove the blocked impurities on the outer periphery of the filter cartridge 2, and can ensure the filtering efficiency.

[0044] Specifically, the restoring member comprises a sleeve 62, a reset spring 63, a resisting rod 64 and a bearing 65. One end of the resisting rod 64 is rotationally connected with the rotating cleaning pipe 61 through the bearing 65, and the other end is slidably inserted into the interior of the sleeve 62 and connected with the sleeve 62 through the reset spring 63.

[0045] When the annular wavy area 21 of the filter cartridge 2 acts on the rotating cleaning pipe 61, the rotating cleaning pipe 61 drives the resisting rod 64 to slide in the sleeve 62, compresses or stretches the reset spring 63. When the protrusions or depressions of the annular wavy area 21 move, the reset spring 63 is reset to push the resisting rod 64 to drive the rotating cleaning pipe 61 to return to the position attached to the annular wavy area 21. The bearing 65 allows the rotating cleaning pipe 61 to freely rotate at the end of the resisting rod 64, so as to ensure flexible adjustment of the rotating cleaning pipe 61.

[0046] Embodiment two On the basis of embodiment one, an industrial wastewater treatment method is provided, which adopts the industrial wastewater treatment device described above, and comprises the following steps: S1, liquid supply filtration: The liquid supply pipe 3 sends industrial wastewater into the filter cylinder 2, the filter cylinder 2 rotates to filter, the filtrate finally falls to the bottom of the treatment tank 1, the scraper 41 scrapes the impurities on the inner wall of the filter cylinder 2, and the impurities are discharged through the guide shell 42.

[0047] S2, stirring treatment: The driving part of the stirring mechanism 5 is started, the rotating pipe 51 drives the telescopic stirring part to rotate, hot gas is introduced to make the telescopic stirring part telescopically extend and retract, the air injection hole 501 sprays air to assist stirring; S3, outer wall cleaning: The gas of the air injection hole 501 is sent to the rotating cleaning pipe 61 through the communication pipe 66 and the rotating joint 67, the rotating cleaning pipe 61 is driven by the rotating filter cylinder 2 to adjust the injection angle, the cleaning hole 601 sprays air, and the filter cylinder 2 intermittently impacts the cylinder wall to vibrate and clean the blockage; S4, liquid discharge: The treated liquid is discharged through the discharge valve 9.

[0048] The above describes the embodiments of the present application, but the embodiments are not limited to the above specific embodiments, the above specific embodiments are only illustrative and not restrictive, and those skilled in the art can make many forms under the inspiration of the embodiments, which all belong to the protection of the embodiments.

Claims

1. An industrial wastewater treatment device comprising a treatment tank (1) which is open upwardly, characterized in that: The processing box (1) is horizontally rotatably provided with a filter cylinder (2) on the top thereof; The filter cylinder (2) is internally provided with a liquid supply pipe (3) and a scraping mechanism (4) for scraping the inner peripheral wall of the filter cylinder (2); The processing box (1) is internally provided with a stirring mechanism (5) at the bottom thereof for processing the filtrate of the filter cylinder (2); The stirring mechanism (5) comprises an extendable stirring member, and a plurality of spray holes (501) are formed in the extendable stirring member; when hot gas is supplied into the stirring mechanism (5), the extendable stirring member changes its length in an extendable and retractable manner and sprays the gas through the spray holes (501) to assist the stirring. The filter cylinder (2) is formed with an annular wavy area (21) on the outer periphery thereof, and the annular wavy area (21) is drivingly connected with a cleaning mechanism (6); the cleaning mechanism (6) is provided with a plurality of cleaning holes (601); the gas sprayed through the spray holes (501) is sprayed from the outer periphery to the inner periphery of the filter cylinder (2); the cleaning mechanism (6) strikes the outer wall of the filter cylinder (2) to vibrate and clean the filter cylinder (2) while rotating and adjusting the spraying angle.

2. An industrial wastewater treatment apparatus as claimed in claim 1, wherein: A partition plate (7) is mounted in the middle of the processing box (1); the partition plate (7) is provided with a liquid discharge valve (8) at the bottom thereof.

3. The industrial wastewater treatment device of claim 1, wherein: The scraping mechanism (4) comprises a scraper (41) and a material guiding shell (42); one end of the material guiding shell (42) extends into the interior of the filter cylinder (2) and is fixedly connected with the scraper (41); the scraper (41) is used for scraping the inner periphery of the filter cylinder (2).

4. An industrial wastewater treatment apparatus as claimed in claim 3, wherein: There is a gap between the scraper (41) and the inner peripheral wall of the filter cylinder (2), and the scraper (41) is obliquely arranged outward.

5. The industrial wastewater treatment device of claim 2, wherein: The stirring mechanism (5) further comprises a rotating pipe (51) and a driving member; the rotating pipe (51) is rotatably arranged on the filter cylinder (2) and is driven by the driving member; the rotating pipe (51) is in communication with the extendable stirring member; one end of the rotating pipe (51) is closed, and the other end is used for supplying the hot gas.

6. An industrial wastewater treatment apparatus as claimed in claim 5, wherein: The extendable stirring member comprises a sleeve pipe (52), a movable pipe (53) and a return spring (54); the sleeve pipe (52) is in communication with the rotating pipe (51); the spray holes (501) are formed in the movable pipe (53) and the sleeve pipe (52); one end of the movable pipe (53) is closed, and the other end extends into the interior of the sleeve pipe (52); a spoiler (57) is sleeved on the closed end of the movable pipe (53); the return spring (54) is located in the interior of the sleeve pipe (52); one end of the return spring (54) is fixedly connected with the rotating pipe (51), and the other end is fixedly connected with the insertion end of the movable pipe (53).

7. An industrial wastewater treatment apparatus as claimed in claim 5, wherein: The driving member comprises a driving motor (55); the rotating pipe (51) and the driving shaft of the driving motor (55) are both sleeved with gear wheels (56) which are in transmission with each other.

8. An industrial wastewater treatment apparatus as claimed in claim 6, wherein: The cleaning mechanism (6) further comprises a rotating cleaning pipe (61), a communication pipe (66), a rotary joint (67) and a restoring member, the cleaning hole (601) is arranged on the rotating cleaning pipe (61), the rotating cleaning pipe (61) is matched with the annular wavy area (21) and is connected with the restoring member, the communication pipe (66) is sleeved on the partition plate (7), the gas inlet end of the communication pipe (66) collects the gas sprayed from the spray hole (501), and the gas outlet end is communicated with the rotating cleaning pipe (61) through the rotary joint (67).

9. An industrial wastewater treatment apparatus as claimed in claim 8, characterised in that: The restoring member comprises a sleeve (62), a reset spring (63), a resisting rod (64) and a bearing (65), one end of the resisting rod (64) is rotationally connected with the rotating cleaning pipe (61) through the bearing (65), the other end is slidably inserted into the sleeve (62) and is connected with the sleeve (62) through the reset spring (63).

10. A method for treating industrial wastewater, using the industrial wastewater treatment device according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: S1, liquid supply filtering: The liquid supply pipe (3) sends the industrial wastewater into the inside of the filtering cylinder (2), the filtering cylinder (2) rotates to filter, the filtrate finally falls to the bottom of the treatment box (1), the scraper (41) scrapes off the impurities on the inner wall of the filtering cylinder (2) and is discharged through the guide shell (42); S2, stirring treatment: The driving member of the stirring mechanism (5) is started, the rotating pipe (51) drives the telescopic stirring member to rotate, the hot gas is introduced to make the telescopic stirring member telescopically, and the gas is sprayed from the spray hole (501) to assist the stirring; S3, outer wall cleaning: The gas of the spray hole (501) is sent to the rotating cleaning pipe (61) through the communication pipe (66) and the rotary joint (67), the rotating pipe (2) drives the rotating cleaning pipe (61) to adjust the spray angle, the cleaning hole (601) sprays the gas, and the filtering cylinder (2) intermittently impacts the cylinder wall to vibrate and clean the blockage; S4, liquid discharge: The treated liquid is discharged through the discharge valve (9).

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