Wastewater treatment device capable of preventing waste blockage
By designing a wastewater treatment device with shaking components and transmission components, the problem of easy blockage of filter nets in papermaking wastewater treatment is solved, and the efficiency of wastewater treatment and production efficiency are improved.
Patent Information
- Application Number
- CN202420585014.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-25
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-03-25
AI Technical Summary
During the papermaking wastewater treatment process, the filter screen is prone to blockage of the water inlet due to waste blockage, affecting the water inlet efficiency and reducing production efficiency.
A wastewater treatment device including a filter chamber and a treatment chamber is designed. The shaking assembly and the transmission assembly drive the filter plate to shake up and down, shaking the waste on the surface of the filter plate, allowing it to enter the impurity box through the through-trough, preventing waste from accumulating and avoiding clogging.
It effectively prevents blockage caused by the accumulation of waste on the surface of the filter plate, improves the efficiency of wastewater treatment, reduces treatment time and improves production efficiency.
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Figure CN222567076U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of papermaking wastewater treatment, and in particular to a wastewater treatment device capable of preventing waste material from clogging. Background Art
[0002] The papermaking industry is an industry that causes heavy environmental pollution. The pulping and papermaking production process consumes a lot of water. Papermaking wastewater mainly comes from the two production processes of pulping and papermaking in the papermaking industry. Pulping and papermaking both discharge a large amount of wastewater. The wastewater generated by pulping is the most polluting. The wastewater discharged during pulp washing is dark brown and is called black water. The concentration of pollutants in black water is very high, with BOD as high as 5-40g / L, and contains a large amount of fiber, inorganic salts and pigments. The wastewater discharged from the bleaching process also contains a large amount of acid and alkali substances. The wastewater discharged from the papermaking machine is called white water, which contains a large amount of fiber and fillers and sizing materials added during the production process. Its treatment process is generally: sewage-pretreatment (sand removal, screening)-primary treatment (sedimentation, clarification or flotation)-secondary treatment (natural oxide, aerated oxidation pond, activated sludge method, biological filter, sometimes chemical flocculation method)-sludge treatment (thickener, centrifuge, vacuum filter, etc.). When pre-treating wastewater generated by papermaking, it is usually necessary to filter the discharged wastewater. During filtering, a filter screen is generally set at the water inlet for filtering. When all the waste materials are concentrated on the filter screen, the filter screen is easily blocked, thereby blocking the water inlet and affecting the water inlet efficiency. This not only wastes time, but also reduces production efficiency. Utility Model Content
[0003] 1. Technical issues to be resolved
[0004] In view of the deficiencies in the prior art, the present application provides a wastewater treatment device that prevents waste from clogging, thereby solving the problems mentioned in the above background technology.
[0005] (II) Technical solution
[0006] To achieve the above objectives, the present application is implemented through the following technical solutions: a wastewater treatment device that prevents waste from clogging, including a treatment box body, the interior of the treatment box body is divided into a filter chamber and a treatment chamber from top to bottom, the filter chamber and the treatment chamber are connected, the filter chamber is connected with a filter plate through a shaking assembly, an impurity box is fixedly installed on one side of the treatment box body and close to the filter chamber, a filter box is arranged inside the impurity box, and a fixing assembly is arranged on the side of the impurity box away from the treatment box body; the shaking assembly includes a rotating groove, the rotating groove is opened on the side of the filter chamber and close to the impurity box, the sliding groove is opened on the side of the filter chamber and away from the rotating groove, one end of the filter plate extends to the inside of the rotating groove and is connected to the filter plate through a rotating rod. The rotating groove is rotatably connected, and one end of the filter plate away from the rotating groove extends into the sliding groove and is slidably connected to the sliding groove. An eccentric wheel is symmetrically connected inside the processing chamber and close to the sliding groove through a transmission assembly. A sliding plate is slidably connected inside the processing chamber and located on the top of the eccentric wheel. Push rods are fixedly installed equidistantly on the top of the sliding plate. One end of the push rod away from the sliding plate extends through the sliding groove and contacts the bottom of the filter plate. Springs are sleeved on the outside of the push rods, and both ends of the springs are fixedly connected to the inside of the processing box body and the top of the sliding plate respectively; a No. 1 through groove is provided on the side of the processing box body that is close to the impurity box and close to the rotating groove, and a No. 2 through groove is provided on the side of the processing box body that is close to the impurity box and close to the bottom of the impurity box.
[0007] By adopting the above technical scheme, when in use, the waste water entering the main body of the treatment box will first be filtered by the filter plate inside the filter chamber and then enter the treatment chamber. Through the set shaking assembly and transmission assembly, the transmission assembly drives the two eccentric wheels to rotate, and further pushes the sliding plate up and down through the eccentric wheel, and then pushes one side of the filter plate up and down through the push rod. The spring is conducive to driving the sliding plate to reset quickly, which is more convenient to use. By driving the filter plate to shake up and down, the waste filtered on the surface of the filter plate is shaken, so that the waste enters the filter box inside the impurity box through the No. 1 through groove. The set No. 2 through groove is conducive to the discharge of waste water filtered by the filter box. The set shaking assembly is conducive to preventing waste from accumulating on the surface of the filter plate and causing blockage, which solves the problem in the related technology that when all the waste is concentrated on the filter net, the filter net is easily blocked, thereby blocking the water inlet, affecting the water inlet efficiency, which not only wastes time but also reduces production efficiency.
[0008] Preferably, the transmission assembly includes a rotating shaft, which is symmetrically rotatably connected to the side wall of the processing box body, and the two eccentric wheels are respectively fixedly mounted on the outside of the rotating shaft, and pulleys are fixedly mounted on the ends of the two rotating shafts away from the eccentric wheels, and belts are sleeved on the outer sides of the two pulleys. A mounting frame is fixedly mounted on one side of the processing box body and close to one of the pulleys, and a No. 2 motor is fixedly mounted on the side of the mounting frame close to one of the pulleys, and the output end of the No. 2 motor is fixedly connected to one of the pulleys.
[0009] By adopting the above technical solution and setting up a transmission assembly, the rotation of the output end of the second motor drives one of the pulleys to rotate, and then drives the other pulley to rotate through the belt, further driving the two rotating shafts to rotate, thereby realizing the rotation of the two eccentric wheels.
[0010] Preferably, the fixing assembly includes a fixing frame, which is symmetrically fixedly installed on a side of the impurity box away from the processing box body, one of the fixing frames is rotatably connected to a bidirectional screw, a fixing plate is symmetrically threadedly connected to the outside of the bidirectional screw and located between the two fixing frames, and a fixing rod is fixedly installed inside the other fixing frame, the fixing rod passes through the two fixing plates, the two fixing plates are slidably connected to the fixing rod, and the side of the fixing plate close to the impurity box slides against the impurity box.
[0011] By adopting the above technical solution and setting a fixing assembly, after the filter box is installed inside the impurity box, the two fixing plates are driven to move toward each other by rotating the bidirectional lead screw, so that the fixing plate fixes the filter box on the side close to the impurity box, making it more stable to use.
[0012] Preferably, a mounting plate is symmetrically fixedly installed inside the impurity box, the filter box is slidably connected above the mounting plate inside the impurity box, a positioning groove is provided on the side of the impurity box away from the processing box body, a positioning plate is provided inside the positioning groove, the positioning plate is fixedly connected to a side close to the filter box, and magnetic strips with opposite magnetic poles are fixedly installed inside the mounting plate and on the side close to the positioning plate.
[0013] By adopting the above technical solution, the impurity box and the mounting plate are set up to help strengthen the support for the filter box inside the impurity box, and the magnetic strips with opposite magnetic poles inside the mounting plate and the positioning plate are set up to help fix the filter box inside the filter box.
[0014] Preferably, a water inlet is fixedly installed through the top of the processing box body, a water outlet pipe is fixedly installed through the bottom of the processing box body, a No. 1 motor is fixedly installed on one side of the processing box body, a stirring rod is rotatably connected inside the processing chamber, and the output end of the No. 1 motor is fixedly connected to the stirring rod.
[0015] By adopting the above technical solution, the output end of the set motor No. 1 drives the stirring rod to rotate, which is beneficial to stirring the filtered wastewater and facilitates adding various chemical reagents into the inside of the treatment box body to treat the filtered wastewater.
[0016] Preferably, a control panel is fixedly mounted on the surface of the processing box body, and the No. 1 motor and the No. 2 motor are both electrically connected to the control panel.
[0017] By adopting the above technical solution, the control panel is set up to facilitate controlling the operation of the No. 1 motor and the No. 2 motor.
[0018] Preferably, one side of the bottom wall of the processing chamber close to the water outlet pipe is arranged as a slope inclined toward the water outlet pipe.
[0019] By adopting the above technical solution, the inclined surface inclined toward the water outlet pipe is helpful to accelerate the discharge of the waste water after filtering inside the processing box body.
[0020] (III) Beneficial effects
[0021] The present application provides a wastewater treatment device that prevents waste from clogging. The device has the following beneficial effects:
[0022] The wastewater treatment device for preventing waste from clogging, when in use, the wastewater entering the main body of the treatment box will first be filtered by the filter plate inside the filter chamber and then enter the treatment chamber, through the provided shaking assembly and transmission assembly, the transmission assembly drives the two eccentric wheels to rotate, further pushes the sliding plate to move up and down through the eccentric wheel, and then pushes one side of the filter plate to move up and down through the push rod, wherein the spring is conducive to driving the sliding plate to quickly reset, and the use is more convenient, by driving the filter plate to shake up and down, the waste filtered on the surface of the filter plate is shaken, so that the waste enters the filter box inside the impurity box through the No. 1 through groove, the provided No. 2 through groove is conducive to the discharge of wastewater filtered by the filter box, and the provided shaking assembly is conducive to preventing waste from accumulating on the surface of the filter plate and causing blockage, which solves the problem in the related technology that when all the waste is concentrated on the filter net, the filter net is easily blocked, thereby blocking the water inlet, affecting the water inlet efficiency, which not only wastes time but also reduces production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a left-side stereoscopic schematic diagram of the entire application;
[0024] Figure 2 It is a right side perspective schematic diagram of the entire application;
[0025] Figure 3 It is a left bottom internal cross-sectional view of the entire application;
[0026] Figure 4It is a split cross-sectional view of the left upward view of the entire application;
[0027] Figure 5 This is a cross-sectional view of the left top view of the entire application.
[0028] In the figure: 1. Processing box body; 11. Filter chamber; 12. Processing chamber; 13. Water inlet; 14. Water outlet pipe; 15. Motor No. 1; 16. Stirring rod; 17. Control panel; 2. Filter plate; 3. Shaking assembly; 31. Rotating groove; 32. Sliding groove; 33. Sliding plate; 34. Push rod; 35. Eccentric wheel; 36. Spring; 4. Transmission assembly; 41. Rotating shaft; 42. Pulley; 43. Belt; 44. Mounting frame; 45. Motor No. 2; 5. Impurity box; 51. Mounting plate; 52. Positioning groove; 6. Filter box; 61. Positioning plate; 7. Fixing assembly; 71. Fixing frame; 72. Bidirectional screw; 73. Fixing plate; 74. Fixing rod; 8. Through groove No. 1; 9. Through groove No. 2. DETAILED DESCRIPTION
[0029] The present application is further described in detail below through drawings and examples.
[0030] Reference Figures 1 to 5The embodiment of the present application provides a wastewater treatment device for preventing waste from clogging, including a treatment box body 1, the interior of the treatment box body 1 is divided into a filter chamber 11 and a treatment chamber 12 from top to bottom, the filter chamber 11 and the treatment chamber 12 are connected, the filter chamber 11 is connected with a filter plate 2 through a shaking component 3, a dirt box 5 is fixedly installed on one side of the treatment box body 1 and close to the filter chamber 11, a filter box 6 is arranged inside the dirt box 5, and a fixing component 7 is arranged on the side of the dirt box 5 away from the treatment box body 1; the shaking component 3 includes a rotating groove 31, the rotating groove 31 is opened inside the filter chamber 11 and close to the side of the dirt box 5, and the inside of the filter chamber 11 and away from the rotating groove 31 A sliding groove 32 is provided on one side of the filter plate 2, one end of the filter plate 2 extends into the interior of the rotating groove 31 and is rotatably connected to the rotating groove 31 through a rotating rod, one end of the filter plate 2 away from the rotating groove 31 extends into the interior of the sliding groove 32 and is slidably connected to the sliding groove 32, an eccentric wheel 35 is symmetrically connected to the processing chamber 12 and close to the sliding groove 32 through a transmission assembly 4, a sliding plate 33 is slidably connected to the top of the eccentric wheel 35 inside the processing chamber 12, a push rod 34 is equidistantly fixed on the top of the sliding plate 33, one end of the push rod 34 away from the sliding plate 33 extends through the sliding groove 32 and conflicts with the bottom of the filter plate 2, and a spring 36 is sleeved on the outer side of the push rod 34, The two ends of the spring 36 are respectively fixedly connected to the inside of the treatment box body 1 and the top of the sliding plate 33; a No. 1 through groove 8 is provided on the side where the treatment box body 1 and the impurity box 5 are close and close to the rotating groove 31, and a No. 2 through groove 9 is provided on the side where the treatment box body 1 and the impurity box 5 are close and close to the bottom of the impurity box 5; when in use, the wastewater entering the treatment box body 1 will first be filtered by the filter plate 2 in the filter chamber 11 and then enter the treatment chamber 12, through the shaking component 3 and the transmission component 4, the transmission component 4 drives the two eccentric wheels 35 to rotate, and further pushes the sliding plate 33 up and down through the eccentric wheel 35, and then pushes the filter plate through the push rod 34 2, one side of which moves up and down, wherein the spring 36 is conducive to driving the sliding plate 33 to quickly reset, which is more convenient to use. By driving the filter plate 2 to shake up and down, the waste filtered on the surface of the filter plate 2 is shaken, so that the waste passes through the No. 1 through groove 8 into the filter box 6 inside the impurity box 5. The set No. 2 through groove 9 is conducive to the discharge of waste water filtered by the filter box 6. The set shaking component 3 is conducive to preventing waste from accumulating on the surface of the filter plate 2 and causing blockage, which solves the problem in the related technology that when all the waste is concentrated on the filter net, the filter net is easily blocked, thereby blocking the water inlet, affecting the water inlet efficiency, which not only wastes time but also reduces production efficiency.
[0031] Furthermore, the transmission assembly 4 includes a rotating shaft 41, which is symmetrically rotatably connected to the side wall of the processing box body 1, and two eccentric wheels 35 are respectively fixedly installed on the outside of the rotating shaft 41, and the ends of the two rotating shafts 41 away from the eccentric wheels 35 are fixedly installed with pulleys 42, and the outer sides of the two pulleys 42 are sleeved with belts 43. A mounting frame 44 is fixedly installed on one side of the processing box body 1 and close to one of the pulleys 42, and a No. 2 motor 45 is fixedly installed on the side of the mounting frame 44 close to one of the pulleys 42, and the output end of the No. 2 motor 45 is fixedly connected to one of the pulleys 42; through the set transmission assembly 4, the rotation of the output end of the No. 2 motor 45 drives one of the pulleys 42 to rotate, and then drives the other pulley 42 to rotate through the belt 43, and further drives the two rotating shafts 41 to rotate, thereby realizing the rotation of the two eccentric wheels 35.
[0032] Furthermore, the fixing assembly 7 includes a fixing frame 71, which is symmetrically fixedly installed on the side of the impurity box 5 away from the processing box body 1, one of the fixing frames 71 is rotatably connected with a two-way screw 72, and a fixing plate 73 is symmetrically threadedly connected on the outside of the two-way screw 72 and located between the two fixing frames 71, and a fixing rod 74 is fixedly installed inside the other fixing frame 71, and the fixing rod 74 passes through the two fixing plates 73, and the two fixing plates 73 are slidably connected to the fixing rod 74, and the side of the fixing plate 73 close to the impurity box 5 slides against the impurity box 5; the fixing assembly 7 is set, after the filter box 6 is installed inside the impurity box 5, the two fixing plates 73 are driven to move toward each other by rotating the two-way screw 72, so that the fixing plate 73 close to the side of the impurity box 5 fixes the filter box 6, which is more stable to use.
[0033] Furthermore, a mounting plate 51 is symmetrically fixedly installed inside the impurity box 5, and the filter box 6 is slidably connected above the mounting plate 51 inside the impurity box 5. A positioning groove 52 is opened on the side of the impurity box 5 away from the processing box body 1, and a positioning plate 61 is arranged inside the positioning groove 52. The positioning plate 61 is fixedly connected to the side close to the filter box 6, and magnetic strips with opposite magnetic poles are fixedly installed inside the mounting plate 51 and on the side close to the positioning plate 61; the impurity box 5 and the mounting plate 51 are set, which is conducive to strengthening the support of the filter box 6 inside the impurity box 5, and the magnetic strips with opposite magnetic poles inside the mounting plate 51 and the positioning plate 61 are conducive to fixing the filter box 6 inside the filter box 6.
[0034] Furthermore, a water inlet 13 is fixedly installed through the top of the processing box body 1, a water outlet pipe 14 is fixedly installed through the bottom of the processing box body 1, a No. 1 motor 15 is fixedly installed on one side of the processing box body 1, a stirring rod 16 is rotatably connected inside the processing chamber 12, and the output end of the No. 1 motor 15 is fixedly connected to the stirring rod 16; the stirring rod 16 is driven to rotate by the output end of the No. 1 motor 15, which is beneficial to stirring the filtered wastewater and convenient for adding various chemical reagents into the processing box body 1 to treat the filtered wastewater.
[0035] Furthermore, a control panel 17 is fixedly mounted on the surface of the processing box body 1, and the No. 1 motor 15 and the No. 2 motor 45 are both electrically connected to the control panel 17; the setting of the control panel 17 is conducive to controlling the operation of the No. 1 motor 15 and the No. 2 motor 45.
[0036] Furthermore, one side of the bottom wall of the processing chamber 12 close to the water outlet pipe 14 is configured as an inclined surface inclined toward the water outlet pipe 14 ; the inclined surface inclined toward the water outlet pipe 14 is beneficial to speeding up the discharge of the filtered wastewater inside the processing box body 1 .
[0037] All electrical equipment in this solution are powered by an external power supply.
[0038] Working principle: when in use, the waste water entering the main body 1 of the treatment box will first be filtered by the filter plate 2 in the filter chamber 11 and then enter the treatment chamber 12. Through the shaking assembly 3 and the transmission assembly 4, the transmission assembly 4 drives the two eccentric wheels 35 to rotate, and further pushes the sliding plate 33 to move up and down through the eccentric wheel 35, and then pushes one side of the filter plate 2 to move up and down through the push rod 34. The spring 36 is conducive to driving the sliding plate 33 to reset quickly, which is more convenient to use. By driving the filter plate 2 to shake up and down, the waste filtered on the surface of the filter plate 2 is shaken, so that the waste passes through the No. 1 through groove 8 and enters the filter box 6 inside the impurity box 5. The No. 2 through groove 9 is conducive to the discharge of the waste water filtered by the filter box 6. The shaking assembly 3 is conducive to preventing the waste from accumulating on the surface of the filter plate 2 and causing blockage, which solves the problem in the related technology that when all the waste is concentrated on the filter net, the filter net is easily blocked, thereby blocking the water inlet, affecting the water inlet efficiency, which not only wastes time but also reduces production efficiency.
[0039] Although the embodiments of the present application 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 application, and that the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A wastewater treatment device for preventing waste from clogging, comprising a treatment tank body (1), characterized in that: The interior of the treatment box body (1) is divided into a filter chamber (11) and a treatment chamber (12) from top to bottom. The filter chamber (11) and the treatment chamber (12) are connected to each other. The filter chamber (11) is connected to a filter plate (2) via a shaking assembly (3). An impurity box (5) is fixedly installed on one side of the treatment box body (1) and close to the filter chamber (11). A filter box (6) is arranged inside the impurity box (5). A fixing assembly (7) is arranged on a side of the impurity box (5) away from the treatment box body (1). The shaking assembly (3) comprises a rotating groove (31). The rotating groove (31) is arranged on a side of the filter chamber (11) and close to the impurity box (5). A sliding groove (32) is arranged on a side of the filter chamber (11) and away from the rotating groove (31). One end of the filter plate (2) extends into the rotating groove (31) and is rotatably connected to the rotating groove (31) via a rotating rod. One end of the filter plate (2) away from the rotating groove (31) extends to An eccentric wheel (35) is symmetrically connected to the sliding groove (32) and is located inside the processing chamber (12) and close to the sliding groove (32) through a transmission assembly (4). A sliding plate (33) is slidably connected to the top of the eccentric wheel (35) and is located inside the processing chamber (12). A push rod (34) is fixedly installed at an equal distance on the top of the sliding plate (33). One end of the push rod (34) away from the sliding plate (33) extends through the interior of the sliding groove (32) and is connected to the sliding groove (32). The bottom of the filter plate (2) is in conflict with each other, and a spring (36) is sleeved on the outer side of the push rod (34). The two ends of the spring (36) are respectively fixedly connected to the inside of the processing box body (1) and the top of the sliding plate (33); a first through groove (8) is provided on the side where the processing box body (1) and the impurity box (5) are close and close to the rotating groove (31), and a second through groove (9) is provided on the side where the processing box body (1) and the impurity box (5) are close and close to the bottom of the impurity box (5).
2. A wastewater treatment device for preventing waste from clogging according to claim 1, characterized in that: The transmission assembly (4) comprises a rotating shaft (41), the rotating shaft (41) being symmetrically rotatably connected to the side wall of the processing box body (1), the two eccentric wheels (35) being respectively fixedly mounted on the outside of the rotating shaft (41), the ends of the two rotating shafts (41) away from the eccentric wheels (35) being fixedly mounted with pulleys (42), the outer sides of the two pulleys (42) being sleeved with belts (43), a mounting frame (44) being fixedly mounted on one side of the processing box body (1) and close to one of the pulleys (42), a second motor (45) being fixedly mounted on one side of the mounting frame (44) close to one of the pulleys (42), and an output end of the second motor (45) being fixedly connected to one of the pulleys (42).
3. A wastewater treatment device for preventing waste from clogging according to claim 2, characterized in that: The fixing assembly (7) comprises a fixing frame (71), wherein the fixing frame (71) is symmetrically fixedly mounted on a side of the impurity box (5) away from the processing box body (1), wherein a bidirectional lead screw (72) is rotatably connected inside one of the fixing frames (71), and a fixing plate (73) is symmetrically threadedly connected outside the bidirectional lead screw (72) and located between the two fixing frames (71), and a fixing rod (74) is fixedly mounted inside the other fixing frame (71), wherein the fixing rod (74) passes through the two fixing plates (73), and the two fixing plates (73) are slidably connected to the fixing rod (74), and a side of the fixing plate (73) close to the impurity box (5) slides against the impurity box (5).
4. A wastewater treatment device for preventing waste from clogging according to claim 3, characterized in that: A mounting plate (51) is symmetrically fixedly mounted inside the impurity box (5), the filter box (6) is slidably connected above the mounting plate (51) inside the impurity box (5), a positioning groove (52) is provided on a side of the impurity box (5) away from the processing box body (1), a positioning plate (61) is arranged inside the positioning groove (52), a side of the positioning plate (61) close to the filter box (6) is fixedly connected, and a magnetic strip with opposite magnetic poles is fixedly mounted inside the mounting plate (51) and on a side close to the positioning plate (61).
5. A wastewater treatment device for preventing waste from clogging according to claim 1, characterized in that: A water inlet (13) is fixedly installed through the top of the treatment box body (1), a water outlet pipe (14) is fixedly installed through the bottom of the treatment box body (1), a No. 1 motor (15) is fixedly installed on one side of the treatment box body (1), a stirring rod (16) is rotatably connected inside the treatment chamber (12), and the output end of the No. 1 motor (15) is fixedly connected to the stirring rod (16).
6. A wastewater treatment device for preventing waste from clogging according to claim 5, characterized in that: A control panel (17) is fixedly mounted on the surface of the processing box body (1), and the first motor (15) and the second motor (45) are both electrically connected to the control panel (17).
7. A wastewater treatment device for preventing waste from clogging according to claim 5, characterized in that: A side of the bottom wall of the processing chamber (12) close to the water outlet pipe (14) is arranged as an inclined surface inclined towards the water outlet pipe (14).
Citation Information
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