Tail water treatment system

Abstract

The invention discloses a tail water treatment system, and relates to the technical field of tail water treatment. A septic tank; the protein separator comprises a reaction bin, a collection cup, a first needle brush pump device, an air supply device, a guide cylinder and a bubble stirring device, the guide cylinder is arranged in the reaction bin and connected with the bottom wall of the reaction bin, the bubble stirring device is arranged in the guide cylinder, the first needle brush pump device is arranged on the outer wall of the reaction bin, and the air supply device is arranged on the outer wall of the reaction bin. The liquid inlet end of the first needle brush pump device is communicated with the reaction bin, the liquid outlet end of the first needle brush pump device extends into the guide cylinder and faces the bubble stirring device, and the bubble stirring device is used for stirring bubbles in water, so that the bubbles are stirred and divided into a plurality of bubbles; the bioreactor is communicated with the reaction bin. The bubble scattering device can divide and scatter bubbles into more small bubbles, so that the separation effect of the protein separator is improved, and the treated water can meet the emission standard or the cyclic utilization requirement.

Description

Technical Field

[0001] The invention relates to the technical field of tail water treatment, and in particular to a tail water treatment system. Background Art

[0002] The tailwater treatment system is a key facility for purifying wastewater generated during the breeding process. It aims to effectively remove various pollutants in the tailwater of aquaculture, ensure that the discharged tailwater meets environmental protection requirements, and reduce the negative impact on the surrounding water environment. The tailwater treatment system usually includes a vertical flow sedimentation tank, a protein separator, a bioreactor and a septic tank. The vertical flow sedimentation tank is mainly used for the preliminary treatment of sewage, so that the heavier solid particles in the sewage (such as feces and feed residues, etc.) gradually settle to the bottom of the tank under their own gravity to achieve solid-liquid separation. The protein separator mainly uses the surface tension of bubbles to adsorb organic matter such as protein in the water to reduce the content of organic matter in the water. The bioreactor mainly provides a good living environment for microorganisms, allowing microorganisms to decompose organic matter in the water so that the treated water can meet the discharge standards or recycling requirements. The septic tank removes suspended matter, organic matter and pathogenic microorganisms in fecal sewage through the principle of anaerobic microbial fermentation to achieve the purpose of purifying water quality.

[0003] In the prior art, the bubbles generated by the protein skimmer are relatively large, which results in poor separation effect of the protein skimmer on organic matter, resulting in poor separation of organic matter in sewage. These organic matter that is not effectively separated will continue to remain in the water and flow into the bioreactor, affecting the metabolism of microorganisms in the bioreactor, and further resulting in the bioreactor being unable to more effectively decompose the organic matter in the water, ultimately causing the treated water to fail to meet the discharge standards or recycling requirements. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a tailwater treatment system that can better separate organic matter in sewage so that the treated water can meet the discharge standard or the requirement of recycling.

[0005] According to an embodiment of the present invention, the tailwater treatment system includes a vertical flow sedimentation tank; a septic tank, which is connected to the bottom of the vertical flow sedimentation tank so that the sediment on the bottom of the vertical flow sedimentation tank can flow into the septic tank; and a protein separator, which includes a reaction chamber, a collection cup, a first needle brush pump device, an air supply device, a guide tube and a bubble agitation device.

[0006] The reaction bin is communicated with the upper part of the vertical flow sedimentation tank so that the water in the vertical flow sedimentation tank can flow into the reaction bin. An overflow port is formed at the upper end of the reaction bin. The collecting cup is arranged at the upper end of the reaction bin and communicated with the overflow port. The overflow port is used for allowing the foam to overflow and flow into the collecting cup. The guide tube is arranged in the reaction bin and connected to the bottom wall of the reaction bin. The guide tube is communicated with the reaction bin. The bubble agitating device is arranged in the guide tube. The first needle brush pump device is arranged on the outer wall of the reaction bin. The liquid inlet end of the first needle brush pump device is connected with the reaction chamber, the liquid outlet end of the first needle brush pump device extends into the guide tube and faces the bubble stirring device, the air supply device is used to supply air to the first needle brush pump device, so that the water transported by the first needle brush pump device carries bubbles and sprays toward the bubble stirring device, and the bubble stirring device is used to stir the bubbles in the water so that the bubbles are stirred and divided into multiple bubbles; a bioreactor, the bioreactor is connected with the reaction chamber, so that the water in the reaction chamber can flow into the bioreactor.

[0007] At least the following beneficial effects:

[0008] When it is necessary to purify the wastewater generated during the breeding process, the wastewater can be first transported to a vertical flow sedimentation tank for pretreatment, and the solid particles in the sewage will gradually settle to the bottom of the vertical flow sedimentation tank under their own gravity. After the sewage is precipitated, the sediment at the bottom of the vertical flow sedimentation tank is transported to a septic tank for the next step of treatment, and the water at the top of the vertical flow sedimentation tank is transported to the reaction chamber in the protein separator for separation treatment. The water inlet end of the first needle brush pump device is connected to the reaction chamber, and the water outlet end of the first needle brush pump device extends into the guide tube and faces the bubble agitation device. The water in the reaction chamber can be sucked into the first needle brush pump device, and at the same time, the air supply device will supply air to the first needle brush pump device, so that the water in the first needle brush pump device carries bubbles, and then the water sprayed from the water outlet end of the first needle brush pump device carries a large number of bubbles. Since the water outlet end of the first needle brush pump device faces the bubble agitation device, the water carrying bubbles sprayed from the liquid outlet end of the first needle brush pump device can act on the bubble agitation device.

[0009] The bubble dispersing device is used to disperse the bubbles in the water so that the large bubbles are dispersed and divided into multiple small bubbles. The small bubbles formed in the guide tube will rise and enter the reaction chamber. The small bubbles can absorb organic matter in the water and form foam on the water surface. The foam will accumulate on the water surface and overflow from the overflow port at the upper end of the reaction chamber, so that the collection cup can collect the overflowed foam attached to the organic matter, thereby completing the separation of the organic matter and water. After the water in the reaction chamber is separated, it will be transported to the bioreactor. The bubble dispersing device can disperse the bubbles in the water so that the bubbles can be divided and dispersed into more small bubbles. The small bubbles have a smaller specific surface area, which makes the small bubbles have more opportunities to contact with the organic matter in the water, so that more organic matter can be adsorbed by the small bubbles, reducing the residual amount of organic matter in the water. Moreover, small bubbles are not easy to burst, which prevents attached or separated organic matter from returning to the water, improves the separation effect of the protein skimmer, effectively reduces the organic content in the water in the reaction chamber, and avoids the water transported to the bioreactor carrying a large amount of organic matter, so that the microorganisms in the bioreactor can smoothly and effectively decompose the organic matter in the water, thereby ensuring that the treated water can meet the discharge standards or recycling requirements.

[0010] According to the tailwater treatment system of an embodiment of the present invention, the bubble agitation device includes a paddle, a first porous plate and a rotating shaft, the rotating shaft is parallel to the up and down directions, the lower end of the rotating shaft can be rotatably connected to the bottom wall of the guide tube, the first porous plate is connected to the rotating shaft, the paddle is arranged on the lower surface of the first porous plate, the liquid outlet end of the first needle brush pump device is arranged below the first porous plate and faces the paddle, and a gap is left in the horizontal direction between the liquid outlet end of the first needle brush pump device and the axis of the rotating shaft, so that the water sprayed from the water outlet end of the first needle brush pump device can impact the paddle, and the paddle, the first porous plate and the rotating shaft can rotate, and the holes on the first porous plate are used for bubbles to pass through, so that the rotating first porous plate can disperse and divide the bubbles.

[0011] According to an embodiment of the present invention, the tail water treatment system also includes a second needle brush pump device, which is arranged on the outer wall of the reaction chamber, the liquid inlet end of the second needle brush pump device is connected to the reaction chamber, the liquid outlet end of the second needle brush pump device extends into the guide tube, and the air supply device is used to supply air to the first needle brush pump device and the second needle brush pump device at the same time. The liquid outlet end of the second needle brush pump device is arranged below the first porous plate and faces the paddle blade, and the liquid outlet end of the second needle brush pump device and the liquid outlet end of the first needle brush pump device are symmetrical around the axis center of the rotating shaft.

[0012] According to the tailwater treatment system of an embodiment of the present invention, the bubble dispersing device also includes a second porous plate, which is arranged above the first porous plate, and the second porous plate is connected to the upper end of the rotating shaft so that the rotating shaft can drive the second porous plate to rotate, and the holes on the second porous plate are used for bubbles to pass through, so that the rotating second porous plate can disperse and divide the bubbles.

[0013] According to the tailwater treatment system of an embodiment of the present invention, the bubble agitation device also includes a transmission member, and the upper end of the rotating shaft is transmission-connected to the second porous plate through the transmission member, so that the rotating rotating shaft can drive the second porous plate to move up and down while rotating.

[0014] According to the tailwater treatment system of an embodiment of the present invention, a bracket is provided in the guide tube, a limiting hole is provided on the bracket, the bracket is arranged above the second porous plate, a avoidance hole is provided in the middle of the second porous plate, the transmission member includes a first sleeve, a second sleeve and a bearing, the second sleeve is sleeved outside the first sleeve, the first sleeve and the second sleeve are connected by the bearing so that the second sleeve can rotate around the axis of the first sleeve, the first sleeve is inserted into the avoidance hole and the limiting hole, the inner wall of the limiting hole is used to limit the first sleeve from rotating around its own axial direction, and the second sleeve and The second porous plate is connected, a guide column is provided on the first sleeve, a guide groove parallel to the up and down direction is provided on the outer wall of the second sleeve, a transmission rod and a transmission block are provided on the upper end of the rotating shaft, a track groove forming a closed loop is provided on the outer wall of the transmission rod, the upper part of the track groove is close to the upper end of the transmission rod, and the lower part of the track groove is close to the lower end of the transmission rod, the transmission rod and the transmission block extend into the first sleeve and the guide groove respectively, and the guide column extends into the track groove, so that the rotating shaft can drive the second sleeve to rotate and drive the first sleeve and the second sleeve to reciprocate up and down.

[0015] According to the tailwater treatment system of an embodiment of the present invention, the transmission member also includes a limiting member, the transmission block is provided with a waist-shaped hole parallel to the up and down directions, the limiting member is passed through the waist-shaped hole and connected to the inner bottom wall of the guide groove, and the limiting member is used to limit the transmission block from escaping from the guide groove.

[0016] According to the tailwater treatment system of an embodiment of the present invention, the first needle brush pump device includes a first needle brush water pump, a first water inlet pipe and a first water outlet pipe. The first needle brush water pump is arranged on the outer wall of the reaction chamber, the water inlet end of the first needle brush water pump is connected with the reaction chamber through the first water inlet pipe, one end of the first water outlet pipe is connected with the water outlet end of the first needle brush water pump, the other end of the first water outlet pipe extends into the guide tube and faces the bubble agitation device, and the first water outlet pipe is connected with the output end of the air supply device.

[0017] According to the tailwater treatment system of the embodiment of the present invention, the middle portion of the bottom wall of the collection cup is in the shape of a frustum that gradually increases from top to bottom.

[0018] According to the tail water treatment system of an embodiment of the present invention, the protein skimmer also includes a flushing device, which is arranged in the collection cup and is used to flush the foam in the collection cup. A drain pipe is provided on the collection cup, and the drain pipe is close to the bottom wall of the collection cup. The drain pipe is used to discharge the water and foam in the collection cup.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 is a schematic diagram of a tailwater treatment system according to an embodiment of the present invention;

[0022] Figure 2 It is a cross-sectional schematic diagram of a protein skimmer in a tail water treatment system according to an embodiment of the present invention;

[0023] Figure 3 It is a top view schematic diagram of the blades, the first water outlet pipe and the second water outlet pipe in the tailwater treatment system of an embodiment of the present invention;

[0024] Figure 4 It is a structural schematic diagram of a bubble agitation device in a tailwater treatment system according to an embodiment of the present invention;

[0025] Figure 5 for Figure 4 A partial enlarged view of the middle A;

[0026] Figure 6 It is a partial structural diagram of the bubble agitation device in the tailwater treatment system of an embodiment of the present invention;

[0027] Figure 7 It is a schematic diagram of the explosion structure of the bubble agitation device in the tail water treatment system according to an embodiment of the present invention;

[0028] Figure 8 It is a schematic diagram of the structure of the transmission parts in the tailwater treatment system according to an embodiment of the present invention;

[0029] Fig. 9 This is a schematic diagram of the structure of a rotating shaft in a tailwater treatment system according to an embodiment of the present invention;

[0030] Fig.10 A partial structural cross-sectional view of a bubble agitation device in a tailwater treatment system according to an embodiment of the present invention;

[0031] Reference numerals:

[0032] Vertical flow sedimentation tank 100;

[0033] Septic tank 200;

[0034] Protein skimmer 300; reaction chamber 310; overflow port 311; collection cup 320; guide tube 330; bracket 331; limit hole 332; first needle brush pump device 340; first needle brush water pump 341; first water inlet pipe 342; first water outlet pipe 343; second needle brush pump device 350; second water outlet pipe 351; bubble agitator 360; first porous plate 361; second porous plate 362; paddle 363; avoidance hole 364; transmission member 370; first sleeve 371; second sleeve 372; bearing 373; guide groove 374; guide column 375; rotating shaft 380; transmission rod 381; transmission block 382; track groove 383; air supply device 390;

[0035] Bioreactor 400. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In the description of the present invention, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0039] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0040] refer to Figure 1 and Figure 2 The tailwater treatment system according to an embodiment of the present invention includes a vertical flow sedimentation tank 100, a septic tank 200, a protein separator 300 and a bioreactor 400.

[0041] The septic tank 200 is connected to the bottom of the vertical flow sedimentation tank 100 so that the sediment on the bottom of the vertical flow sedimentation tank 100 can flow into the septic tank 200. The protein separator 300 includes a reaction chamber 310, a collection cup 320, a first needle brush pump device 340, an air supply device 390, a guide tube 330 and a bubble agitation device 360. The reaction chamber 310 is connected to the upper part of the vertical flow sedimentation tank 100 so that the water in the vertical flow sedimentation tank 100 can flow into the reaction chamber 310. An overflow port 311 is formed at the upper end of the reaction chamber 310. The collection cup 320 is arranged at the upper end of the reaction chamber 310 and is connected to the overflow port 311. The overflow port 311 is used for the foam to overflow and flow into the collection cup 320. The guide tube 330 is arranged in the reaction chamber 310 and is connected to the upper end of the reaction chamber 310. The bottom wall is connected, the guide tube 330 is connected with the reaction chamber 310, the bubble dispersing device 360 ​​is arranged in the guide tube 330, the first needle brush pump device 340 is arranged on the outer wall of the reaction chamber 310, the liquid inlet end of the first needle brush pump device 340 is connected with the reaction chamber 310, the liquid outlet end of the first needle brush pump device 340 extends into the guide tube 330 and faces the bubble dispersing device 360, the air supply device 390 is used to supply air to the first needle brush pump device 340, so that the water transported by the first needle brush pump device 340 carries bubbles and sprays toward the bubble dispersing device 360, and the bubble dispersing device 360 ​​is used to disperse the bubbles in the water so that the bubbles are dispersed and divided into multiple bubbles. The bioreactor 400, the bioreactor 400 is connected with the reaction chamber 310, so that the water in the reaction chamber 310 can flow into the bioreactor 400.

[0042] The vertical flow sedimentation tank 100, the protein separator 300 and the bioreactor 400 are connected in sequence, and the vertical flow sedimentation tank 100 is connected to the septic tank 200. The wastewater generated by aquaculture will first be transported to the vertical flow sedimentation tank 100 for wastewater pretreatment. The vertical flow sedimentation tank 100 is a water treatment facility that uses the gravity sedimentation principle for solid-liquid separation. After the sewage is transported to the vertical flow sedimentation tank 100, the solid particles in the sewage will gradually settle to the bottom of the vertical flow sedimentation tank 100 under their own gravity, effectively reducing the suspended matter content in the wastewater, so that the water at the top of the vertical flow sedimentation tank 100 can remain clear. After the sewage in the vertical flow sedimentation tank 100 is precipitated, the sediment at the bottom will be transported to the septic tank 200, and the water at the top will be transported to the protein separator 300. In an embodiment of the present invention, the septic tank 200 includes a primary tank, a secondary tank and a tertiary tank that are connected in sequence. The primary pool is connected to the vertical flow sedimentation tank 100, and the water and sediment at the bottom of the vertical flow sedimentation tank 100 will first be transported to the primary pool. The primary pool mainly performs sedimentation treatment and preliminary anaerobic fermentation on the water and sediment, and then the water and sediment in the primary pool will be sent to the secondary pool for deep anaerobic fermentation, and then the water in the secondary pool will be sent to the tertiary pool for further clarification. As an embodiment of the present invention, the clean water in the tertiary pool can also be re-transported to the vertical flow sedimentation tank 100 for re-precipitation. The vertical flow sedimentation tank 100 and the septic tank 200 are both common settings in the tailwater treatment system, and their corresponding principles and structures are not further described here. In an embodiment of the present invention, the tailwater treatment system also includes a plurality of delivery pumps for sewage transportation, and the sewage can flow before the vertical flow sedimentation tank 100, the septic tank 200, the protein separator 300 and the bioreactor 400, which will not be further described here.

[0043] The protein skimmer 300 includes a reaction chamber 310, a collection cup 320, a first needle brush pump device 340, an air supply device 390, a guide tube 330 and a bubble agitation device 360. The reaction chamber 310 is connected to the upper part of the vertical flow sedimentation tank 100, and the reaction chamber 310 is connected to the bioreactor 400. After the sewage in the vertical flow sedimentation tank 100 is precipitated, the water in the upper part of the vertical flow sedimentation tank 100 will flow into the reaction chamber 310, and then the first needle brush pump device 340 and the air supply device 390 will be started. The water inlet and outlet of the first needle brush pump device 340 are connected to the reaction chamber 310 at the same time, so that the water in the reaction chamber 310 can be sucked into the first needle brush pump device 340. At the same time, the air supply device 390 will supply air to the first needle brush pump device 340, so that the water in the first needle brush pump device 340 carries bubbles, and the first needle brush pump device 340 can disperse the bubbles, so that the water sprayed from the water outlet of the first needle brush pump device 340 carries a large number of bubbles. After the bubbles are sent into the reaction chamber 310, organic matter such as protein in the water will be adsorbed on the surface of the bubbles. As the bubbles rise, the bubbles will carry organic matter such as protein to form foam on the water surface. These foams will accumulate on the water surface and overflow from the overflow port 311 at the upper end of the reaction chamber 310. The collection cup 320 can collect the overflowed foam with organic matter such as protein attached, thereby completing the separation of organic matter such as protein from water. After the water in the reaction chamber 310 is separated, it will be transported to the bioreactor 400. In the embodiment of the present invention, the protein skimmer 300 further includes a drain pipe, and the reaction chamber 310 is connected to the bioreactor 400 through the drain pipe, so that the water in the reaction chamber 310 can flow into the bioreactor 400 through the drain pipe.

[0044] It should be explained that in the prior art, the bubbles generated by the needle brush pump device in the protein skimmer 300 are relatively large. On the one hand, the specific surface area of ​​large bubbles is relatively small, which reduces the contact opportunities between large bubbles and organic matter such as proteins in the water, thereby preventing some organic matter such as proteins from being adsorbed by large bubbles, causing some organic matter such as proteins to continue to remain in the water. On the other hand, large bubbles are prone to rupture, causing attached or separated organic matter such as proteins to return to the water. It can be seen from this that when the bubbles generated by the protein skimmer 300 are relatively large, organic matter such as proteins in the water in the reaction chamber 310 cannot be separated well, resulting in a large amount of organic matter such as proteins remaining in the water in the reaction chamber 310, thereby reducing the separation effect of the protein skimmer 300. When the water carrying organic matter in the reaction chamber 310 flows into the bioreactor 400, the environmental conditions in the bioreactor 400 will change. Some microorganisms with strong ability to decompose organic matter may over-breed due to organic matter overload, while other microorganisms may be inhibited or even die due to changes in environmental conditions (such as large consumption of oxygen, changes in pH, etc.), causing the microbial community in the bioreactor 400 to be unbalanced, resulting in a poor water treatment effect of the bioreactor 400, and ultimately causing the treated water to fail to meet the discharge standard or recycling requirements. In an embodiment of the present invention, the bioreactor 400 can be a moving bed bioreactor 400, which is a common setting in a sewage treatment system, and its corresponding structure and principle will not be further described here.

[0045] As an embodiment of the present invention, the bubble dispersing device 360 ​​includes a motor and a plurality of stirring rods in vertical and up-and-down directions, one end of each of the plurality of stirring rods is connected to the output end of the motor, and the motor is used to drive the plurality of stirring rods to rotate in the guide tube 330. The liquid outlet of the first needle brush pump device 340 faces the plurality of stirring rods, so that the water carrying bubbles sprayed from the liquid outlet of the first needle brush pump device 340 can act on the rotating plurality of stirring rods, and the plurality of stirring rods have a dispersing effect on the bubbles, so that one bubble is divided and dispersed by the stirring rods and broken into a plurality of small bubbles. Finally, the bubbles in the guide tube 330 will rise and enter the reaction chamber 310 to complete the separation process of the water in the reaction chamber 310. It should be explained that the bubbles will be broken and form a plurality of small bubbles during the process of being divided and dispersed.

[0046] It is understandable that when it is necessary to purify the wastewater generated during the breeding process, the wastewater can first be transported to the vertical flow sedimentation tank 100 for pretreatment, and the solid particles in the sewage will gradually settle to the bottom of the vertical flow sedimentation tank 100 under their own gravity. After the sewage is precipitated, the sediment at the bottom of the vertical flow sedimentation tank 100 is transported to the septic tank 200 for the next step of treatment, and the water at the top of the vertical flow sedimentation tank 100 is transported to the reaction chamber 310 in the protein separator 300 for separation treatment. The water inlet end of the first needle brush pump device 340 is connected to the reaction chamber 310, and the water outlet end of the first needle brush pump device 340 extends into the guide tube 330 and faces the bubble agitation device 360. The water in the reaction chamber 310 can be sucked into the first needle brush pump device 340. At the same time, the air supply device 390 supplies air into the first needle brush pump device 340, so that the water in the first needle brush pump device 340 carries air bubbles, and then the water sprayed from the water outlet of the first needle brush pump device 340 carries a large number of air bubbles. Since the water outlet of the first needle brush pump device 340 faces the bubble agitator 360, the water with air bubbles sprayed from the liquid outlet of the first needle brush pump device 340 can act on the bubble agitator 360.

[0047] The bubble dispersing device 360 ​​is used to disperse the bubbles in the water so that the large bubbles are dispersed and divided into a plurality of small bubbles. The small bubbles formed in the guide tube 330 will rise and enter the reaction chamber 310. The small bubbles can absorb organic matter in the water and form foam on the water surface. The foam will accumulate on the water surface and overflow from the overflow port 311 at the upper end of the reaction chamber 310, so that the collection cup 320 can collect the overflowed foam attached to the organic matter, thereby completing the separation of the organic matter and the water. After the water in the reaction chamber 310 is separated and processed, it will be transported to the bioreactor 400. The bubble dispersing device 360 ​​can disperse the bubbles in the water so that the bubbles can be divided and dispersed into more small bubbles. The small bubbles have a smaller specific surface area, so that the small bubbles have more opportunities to contact with the organic matter in the water, thereby allowing more organic matter to be adsorbed by the small bubbles, reducing the residual amount of organic matter in the water. Moreover, the small bubbles are not easy to burst, which prevents the attached or separated organic matter from returning to the water, thereby improving the separation effect of the protein skimmer 300, effectively reducing the organic matter content in the water in the reaction chamber 310, and preventing the water transported to the bioreactor 400 from carrying a large amount of organic matter, so that the microorganisms in the bioreactor 400 can smoothly and effectively decompose the organic matter in the water, thereby allowing the treated water to meet the discharge standards or recycling requirements.

[0048] refer to Figure 2 and Figure 3The first needle brush pump device 340 includes a first needle brush water pump 341, a first water inlet pipe 342 and a first water outlet pipe 343. The first needle brush water pump 341 is arranged on the outer wall of the reaction chamber 310. The water inlet end of the first needle brush water pump 341 is connected to the reaction chamber 310 through the first water inlet pipe 342. One end of the first water outlet pipe 343 is connected to the water outlet end of the first needle brush water pump 341. The other end of the first water outlet pipe 343 extends into the guide tube 330 and faces the bubble agitation device 360. The first water outlet pipe 343 is connected to the output end of the air supply device 390. It can be understood that the first water outlet pipe 343 is connected to the output end of the air supply device 390, so that the air supply device 390 can send gas into the first water outlet pipe 343, so that the water in the first water outlet pipe 343 carries bubbles. After the first needle brush water pump 341 is started, the water in the reaction chamber 310 will flow into the water inlet end of the first needle brush water pump 341 through the first water inlet pipe 342. The high-speed rotating needle brush in the first needle brush water pump 341 can disperse the bubbles carried in the water in the first water outlet pipe 343. Under the pumping action of the first needle brush water pump 341, the water carrying a large number of bubbles will be sprayed into the guide tube 330 through the first water outlet pipe 343. The first needle brush water pump 341 and the air supply device 390 are common settings in the protein skimmer 300, and their specific working principles will not be further described here.

[0049] refer to Figures 2 to 4 The bubble agitating device 360 ​​includes a paddle 363, a first porous plate 361 and a rotating shaft 380. The rotating shaft 380 is parallel to the up and down directions. The lower end of the rotating shaft 380 can be rotatably connected to the bottom wall of the guide tube 330. The first porous plate 361 is connected to the rotating shaft 380. The paddle 363 is arranged on the lower surface of the first porous plate 361. The liquid outlet end of the first needle brush pump device 340 is arranged below the first porous plate 361 and faces the paddle 363. There is a gap between the liquid outlet end of the first needle brush pump device 340 and the axis of the rotating shaft 380 in the horizontal direction, so that the water sprayed from the water outlet end of the first needle brush pump device 340 can impact on the paddle 363, and the paddle 363, the first porous plate 361 and the rotating shaft 380 can rotate. The holes on the first porous plate 361 are used for bubbles to pass through, so that the rotating first porous plate 361 can disperse and split the bubbles. It can be understood that the paddle 363, the first porous plate 361 and the rotating shaft 380 are all coaxially arranged, and a gap is left between the liquid outlet of the first needle brush pump device 340 and the axis of the rotating shaft 380 in the horizontal direction, that is, the liquid outlet of the first needle brush pump device 340 and the paddle 363 are eccentrically arranged. After the first needle brush pump device 340 is started, the water carrying bubbles sprayed from the liquid outlet of the first needle brush pump device 340 will impact the paddle 363, causing the paddle 363 to start rotating around the axis of the rotating shaft 380. The rotating paddle 363 will drive the first porous plate 361 and the rotating shaft 380 to rotate together.

[0050] The first porous plate 361 is provided with a plurality of holes for bubbles to pass through. Since the water outlet of the first needle brush pump device 340 is arranged below the first porous plate 361, a large number of bubbles will be carried in the water below the first porous plate 361. In the process of the bubbles rising, the bubbles will pass through the holes on the first porous plate 361. Since the first porous plate 361 keeps rotating, in the process of the bubbles passing through the holes on the first porous plate 361, the hole walls of the first porous plate 361 divide and disperse the bubbles, so that the bubbles can be divided and dispersed into a plurality of smaller bubbles. After passing through the first porous plate 361, the bubbles continue to rise, so that the bubbles leave the guide tube 330 and enter the reaction chamber 310. Reference Figure 2 and Figure 3 In the embodiment of the present invention, the portion of the first water outlet pipe 343 located in the reaction chamber 310 is parallel to the left and right direction, the axis of the portion of the first water outlet pipe 343 located in the reaction chamber 310 is perpendicular to the axis of the rotating shaft 380, and a gap is left between the two axes in the horizontal direction, so that the first water outlet pipe 343 and the paddle 363 are eccentrically arranged, and the water sprayed from the other end of the first water outlet pipe 343 can drive the paddle 363 to rotate.

[0051] refer to Figure 2 and Figure 3 The tailwater treatment system also includes a second needle brush pump device 350, which is arranged on the outer wall of the reaction chamber 310, the liquid inlet end of the second needle brush pump device 350 is connected to the reaction chamber 310, the liquid outlet end of the second needle brush pump device 350 extends into the guide tube 330, the air supply device 390 is used to supply air to the first needle brush pump device 340 and the second needle brush pump device 350 at the same time, the liquid outlet end of the second needle brush pump device 350 is arranged below the first porous plate 361 and faces the paddle 363, and the liquid outlet end of the second needle brush pump device 350 and the liquid outlet end of the first needle brush pump device 340 are symmetrical around the axis of the rotating shaft 380. It can be understood that the liquid outlet end of the second needle brush pump device 350 faces the paddle 363, so that the water sprayed from the water outlet end of the second needle brush pump device 350 can also impact the paddle 363 and drive the paddle 363 to rotate. The liquid outlet of the second needle brush pump device 350 and the liquid outlet of the first needle brush pump device 340 are symmetrical around the axis of the rotating shaft 380, so that the water sprayed from the liquid outlets of the first needle brush pump device 340 and the second needle brush pump device 350 can impact on both sides of the paddle 363 respectively, thereby making the force on the paddle 363 more uniform, ensuring that the paddle 363, the first porous plate 361 and the rotating shaft 380 can rotate smoothly. On the other hand, the additional addition of the second needle brush pump device 350 can provide more abundant bubbles, which is conducive to improving the separation effect of the protein skimmer 300.

[0052] In the embodiment of the present invention, the second needle brush pump device 350 includes a second needle brush water pump, a second water inlet pipe and a second water outlet pipe 351. The second needle brush water pump is arranged on the outer wall of the reaction chamber 310. The water inlet end of the second needle brush water pump is connected to the reaction chamber 310 through the second water inlet pipe. One end of the second water outlet pipe 351 is connected to the water outlet end of the second needle brush water pump. The other end of the second water outlet pipe 351 extends into the guide tube 330 and faces the bubble agitation device 360. The second water outlet pipe 351 is connected to the output end of the air supply device 390. The second needle brush water pump has the same principle as the first needle brush water pump 341, which will not be further described here. Figure 3 In the embodiment of the present invention, the portion of the second water outlet pipe 351 located in the reaction chamber 310 is parallel to the left-right direction, the axis of the portion of the second water outlet pipe 351 located in the reaction chamber 310 is perpendicular to the axis of the rotating shaft 380, and a gap is left between the two axes in the horizontal direction, so that the second water outlet pipe 351 and the paddle 363 are eccentrically arranged, and the water sprayed from the other end of the second water outlet pipe 351 can drive the paddle 363 to rotate. Specifically, the portion of the first water outlet pipe 343 and the second water outlet pipe 351 located in the reaction chamber 310 are symmetrical around the axis of the rotating shaft 380.

[0053] refer to Figure 2 , Figure 4 and Figure 7 , the bubble dispersing device 360 ​​also includes a second porous plate 362, which is arranged above the first porous plate 361, and the second porous plate 362 is connected to the upper end of the rotating shaft 380 so that the rotating rotating shaft 380 can drive the second porous plate 362 to rotate, and the holes on the second porous plate 362 are used for bubbles to pass through, so that the rotating second porous plate 362 can disperse and split the bubbles. It is understandable that the second porous plate 362 is connected to the upper end of the rotating shaft 380 so that the rotating shaft 380 can drive the second porous plate 362 to rotate. After passing through the first porous plate 361, the bubbles will continue to rise and approach the second porous plate 362, and the second porous plate 362 is provided with a plurality of holes for the bubbles to pass through. Since the second porous plate 362 keeps rotating, in the process of the bubbles passing through the holes on the second porous plate 362, the hole walls of the holes on the second porous plate 362 play a role in segmenting and dispersing the bubbles. On the one hand, during the process of the first porous plate 361 dividing and agitating the bubbles, some bubbles may directly pass through the first porous plate 361 without being divided and agitated, and the second porous plate 362 can divide and agitate these bubbles again, effectively preventing the large bubbles that have not been divided and agitated from rising into the reaction chamber 310. On the other hand, the second porous plate 362 can divide and agitate the rising bubbles again, so that the bubbles can be divided and agitated into a plurality of small bubbles again, thereby making the small bubbles that rise into the reaction chamber 310 more abundant, which is conducive to improving the separation effect of the protein skimmer 300.

[0054] refer to Figures 4 to 8 The bubble dispersing device 360 ​​also includes a transmission member 370, and the upper end of the rotating shaft 380 is connected to the second porous plate 362 through the transmission member 370, so that the rotating shaft 380 can drive the second porous plate 362 to move up and down while rotating. It can be understood that the upper end of the rotating shaft 380 is connected to the second porous plate 362 through the transmission member 370. Under the transmission action of the transmission member 370, the rotating shaft 380 can drive the second porous plate 362 to move up and down while driving the second porous plate 362 to rotate. The second porous plate 362 can also move up and down while rotating. This complex movement path greatly increases the probability of collision between bubbles and between bubbles and the second porous plate 362, and also makes the movement of water and bubbles around the second porous plate 362 more intense, so that the bubbles in the water can be more easily broken to form multiple small bubbles, thereby improving the segmentation and dispersing effect of the second porous plate 362 on the bubbles.

[0055] refer to Figures 4 to 7 The guide tube 330 is provided with a bracket 331, and a limiting hole 332 is provided on the bracket 331. The bracket 331 is arranged above the second porous plate 362, and a avoidance hole 364 is provided in the middle of the second porous plate 362. The transmission member 370 includes a first sleeve 371, a second sleeve 372 and a bearing 373. The second sleeve 372 is sleeved outside the first sleeve 371. The first sleeve 371 and the second sleeve 372 are connected by the bearing 373 so that the second sleeve 372 can rotate around the axis of the first sleeve 371. The first sleeve 371 is inserted into the avoidance hole 364 and the limiting hole 332. The inner wall of the limiting hole 332 is used to limit the first sleeve 371 from rotating around its own axis. The second sleeve 372 and the second porous plate 3 62 is connected, a guide column 375 is provided on the first sleeve 371, a guide groove 374 parallel to the up and down direction is provided on the outer wall of the second sleeve 372, a transmission rod 381 and a transmission block 382 are provided on the upper end of the rotating shaft 380, a track groove 383 forming a closed loop is provided on the outer wall of the transmission rod 381, the upper part of the track groove 383 is close to the upper end of the transmission rod 381, and the lower part of the track groove 383 is close to the lower end of the transmission rod 381, the transmission rod 381 and the transmission block 382 extend into the first sleeve 371 and the guide groove 374 respectively, and the guide column 375 extends into the track groove 383, so that the rotating shaft 380 can drive the second sleeve 372 to rotate and drive the first sleeve 371 and the second sleeve 372 to reciprocate up and down. In the embodiment of the present invention, the bearing 373 can be a bidirectional thrust bearing.

[0056] It can be understood that the second sleeve 372 is arranged outside the first sleeve 371, the first sleeve 371 is installed on the inner ring of the bearing 373, and the second sleeve 372 is installed on the outer ring of the bearing 373, so that the second sleeve 372 can rotate around the axis of the first sleeve 371. The bracket 331 is installed on the inner wall of the guide tube 330, and a limiting hole 332 is provided on the bracket 331. The middle part of the second porous plate 362 is provided with an avoidance hole 364, and the first sleeve 371 is penetrated in the limiting hole 332 and the avoidance hole 364. The inner wall of the limiting hole 332 can be abutted against the outer wall of the first sleeve 371, and the inner wall of the limiting hole 332 plays a limiting role on the first sleeve 371, preventing the first sleeve 371 from rotating around its own axis, and the first sleeve 371 can move in the limiting hole 332 in the up and down direction. The second sleeve 372 is connected to the second porous plate 362, so that the second sleeve 372 can drive the second porous plate 362 to rotate. The upper end of the rotating shaft 380 is provided with a transmission block 382 and a transmission rod 381, the transmission rod 381 is coaxial with the rotating shaft 380, and the transmission block 382 extends into a guide groove 374 on the outer wall of the second sleeve 372 parallel to the up and down direction. The outer wall of the rotating shaft 380 is provided with a track groove 383 forming a closed loop, and the track groove 383 is inclined so that the upper part of the track groove 383 is close to the upper end of the transmission rod 381, and the lower part of the track groove 383 is close to the lower end of the transmission rod 381. The rotating shaft 380 extends into the first sleeve 371, and the guide column 375 on the first sleeve 371 extends into the track groove 383 on the outer wall of the rotating shaft 380.

[0057] refer to Figures 8 to 10 When the rotating shaft 380 starts to rotate, the transmission block 382 at the upper end of the rotating shaft 380 starts to rotate around the axis of the rotating shaft 380, and the transmission rod 381 at the upper end of the rotating shaft 380 starts to rotate around its own axial direction. The transmission block 382 can abut against the inner wall of the guide groove 374 on the outer wall of the second sleeve 372, so that the transmission block 382 can drive the second sleeve 372 to rotate, and then the second sleeve 372 drives the second porous plate 362 to rotate. The inner wall of the track groove 383 on the outer wall of the transmission rod 381 can abut against the guide column 375 on the first sleeve 371, and the inner wall of the track groove 383 can drive the guide column 375 to move up and down, so that the guide column 375 can drive the first sleeve 371 to move up and down. Since the first sleeve 371 and the second sleeve 372 are connected by the bearing 373, the first sleeve 371 can drive the second sleeve 372 and the second porous plate 362 to move up and down. It can be seen from this that when the rotating shaft 380 starts to rotate, the second sleeve 372 can move up and down while rotating, so that the second sleeve 372 can drive the second porous plate 362 to move up and down while rotating. Fig. 9The projection of the track groove 383 in the up-down direction is a circular ring projection, and the projection of the track groove 383 in the front-back direction is an elliptical ring projection. The inner wall of the track groove 383 guides the guide post 375. Since the inner wall of the limiting hole 332 hinders the rotation of the first sleeve 371, the guide post 375 is driven by the inner wall of the track groove 383 to achieve reciprocating up and down movement.

[0058] As an embodiment of the present invention, the transmission member 370 further includes a stopper, and a waist-shaped hole parallel to the up-down direction is provided on the transmission block 382, ​​and the stopper is inserted into the waist-shaped hole and connected to the inner bottom wall of the guide groove 374, and the stopper is used to limit the transmission block 382 from coming out of the guide groove 374. It can be understood that, as an embodiment of the present invention, the stopper can be a bolt, and the bolt is inserted into the waist-shaped hole on the transmission block 382 and connected to the inner bottom wall of the guide groove 374, and the nut of the bolt can abut against the transmission block 382, ​​effectively preventing the transmission block 382 from coming out of the guide groove 374, and ensuring that the transmission block 382 can stably drive the second sleeve 372 to rotate. As an embodiment of the present invention, two transmission blocks 382 are provided at the upper end of the rotating shaft 380, and two guide grooves 374 are provided on the outer wall of the second sleeve 372, and the two transmission blocks 382 extend into the two guide grooves 374 respectively, which will not be further described here.

[0059] refer to Figure 2 , the middle part of the bottom wall of the collection cup 320 is in a truncated cone shape that gradually increases from top to bottom. The protein skimmer 300 also includes a flushing device, which is arranged in the collection cup 320, and is used to flush the foam in the collection cup 320. The collection cup 320 is provided with a drain pipe, which is close to the bottom wall of the collection cup 320, and is used to discharge the water and foam in the collection cup 320. It can be understood that the middle part of the bottom wall of the collection cup 320 is in a truncated cone shape that gradually increases from top to bottom, so that the middle part of the bottom wall of the collection cup 320 can guide the foam flowing into the collection cup 320, and then the foam can flow to the lowest position of the bottom wall of the collection cup 320. The area near the bottom wall of the collection cup 320 is provided with a drain pipe, and the drain pipe can smoothly discharge the water and foam gathered on the bottom wall of the collection cup 320 for post-processing. A flushing device is also provided in the collection cup 320 , and the flushing device can flush the foam in the collection cup 320 , so that the foam in the collection cup 320 can be discharged more smoothly through the sewage pipe.

[0060] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A tailwater treatment system, characterized in that: include: Vertical flow sedimentation tank (100); A septic tank (200), wherein the septic tank (200) is connected to the bottom of the vertical flow sedimentation tank (100) so that the sediment on the bottom of the vertical flow sedimentation tank (100) can flow into the septic tank (200); A protein skimmer (300), the protein skimmer (300) comprising a reaction chamber (310), a collecting cup (320), a first needle brush pump device (340), an air supply device (390), a guide tube (330) and a bubble agitation device (360), the reaction chamber (310) being in communication with the upper portion of the vertical flow sedimentation tank (100) so that water in the vertical flow sedimentation tank (100) can flow into the reaction chamber (310), an overflow port (311) being formed at the upper end of the reaction chamber (310), the collecting cup (320) being arranged at the upper end of the reaction chamber (310) and being in communication with the overflow port (311), the overflow port (311) being used for allowing bubbles to overflow and flow into the collecting cup (320), the guide tube (330) being arranged in the reaction chamber (310) and being in communication with the reaction chamber (3 10), the guide tube (330) is connected to the bottom wall of the reaction chamber (310), the guide tube (330) is connected to the reaction chamber (310), the bubble dispersing device (360) is arranged in the guide tube (330), the first needle brush pump device (340) is arranged on the outer wall of the reaction chamber (310), the liquid inlet end of the first needle brush pump device (340) is connected to the reaction chamber (310), the liquid outlet end of the first needle brush pump device (340) extends into the guide tube (330) and faces the bubble dispersing device (360), the air supply device (390) is used to supply air to the first needle brush pump device (340), so that the water transported by the first needle brush pump device (340) carries bubbles and is sprayed toward the bubble dispersing device (360), and the bubble dispersing device (360) is used to disperse bubbles in the water, so that the bubbles are dispersed and divided into a plurality of bubbles; The bioreactor (400) is connected to the reaction chamber (310) so that water in the reaction chamber (310) can flow into the bioreactor (400).

2. The tailwater treatment system according to claim 1, characterized in that: The bubble agitating device (360) comprises a paddle (363), a first porous plate (361) and a rotating shaft (380), wherein the rotating shaft (380) is parallel to the up-down direction, the lower end of the rotating shaft (380) is rotatably connected to the bottom wall of the guide tube (330), the first porous plate (361) is connected to the rotating shaft (380), the paddle (363) is arranged on the lower surface of the first porous plate (361), and the liquid outlet end of the first needle brush pump device (340) is arranged below the first porous plate (361). And toward the paddle (363), a gap is left in the horizontal direction between the liquid outlet end of the first needle brush pump device (340) and the axis of the rotating shaft (380), so that water sprayed from the water outlet end of the first needle brush pump device (340) can impact on the paddle (363), and enable the paddle (363), the first porous plate (361) and the rotating shaft (380) to rotate, and the holes on the first porous plate (361) are used for bubbles to pass through, so that the rotating first porous plate (361) can disperse and divide the bubbles.

3. The tailwater treatment system according to claim 2, characterized in that: The invention also comprises a second needle brush pump device (350), wherein the second needle brush pump device (350) is arranged on the outer wall of the reaction chamber (310), the liquid inlet end of the second needle brush pump device (350) is connected to the reaction chamber (310), the liquid outlet end of the second needle brush pump device (350) extends into the guide tube (330), the air supply device (390) is used to supply air to the first needle brush pump device (340) and the second needle brush pump device (350) at the same time, the liquid outlet end of the second needle brush pump device (350) is arranged below the first porous plate (361) and faces the paddle (363), and the liquid outlet end of the second needle brush pump device (350) and the liquid outlet end of the first needle brush pump device (340) are symmetrical around the axis of the rotating shaft (380).

4. The tailwater treatment system according to claim 2, characterized in that: The bubble-dispersing device (360) also includes a second porous plate (362), which is arranged above the first porous plate (361). The second porous plate (362) is connected to the upper end of the rotating shaft (380) so that the rotating rotating shaft (380) can drive the second porous plate (362) to rotate, and the holes on the second porous plate (362) are used for bubbles to pass through, so that the rotating second porous plate (362) can disperse and split the bubbles.

5. The tailwater treatment system according to claim 4, characterized in that: The bubble agitating device (360) further comprises a transmission member (370), and the upper end of the rotating shaft (380) is connected to the second porous plate (362) via the transmission member (370), so that the rotating rotating shaft (380) can drive the second porous plate (362) to move up and down while rotating.

6. The tailwater treatment system according to claim 5, characterized in that: The guide tube (330) is provided with a bracket (331), the bracket (331) is provided with a limiting hole (332), the bracket (331) is arranged above the second porous plate (362), the middle part of the second porous plate (362) is provided with an avoidance hole (364), the transmission member (370) comprises a first sleeve (371), a second sleeve (372) and a bearing (373), the second sleeve (372) is sleeved outside the first sleeve (371), The first sleeve (371) and the second sleeve (372) are connected via the bearing (373) so that the second sleeve (372) can rotate around the axis of the first sleeve (371). The first sleeve (371) is inserted into the avoidance hole (364) and the limiting hole (332). The inner wall of the limiting hole (332) is used to limit the first sleeve (371) from rotating around its own axis. The second sleeve (372) and the second sleeve (372) are connected to each other. The first sleeve (371) is connected to the orifice plate (362), a guide column (375) is provided on the first sleeve (371), a guide groove (374) parallel to the up and down direction is provided on the outer wall of the second sleeve (372), a transmission rod (381) and a transmission block (382) are provided on the upper end of the rotating shaft (380), a track groove (383) forming a closed loop is provided on the outer wall of the transmission rod (381), the upper part of the track groove (383) is close to the upper end of the transmission rod (381), and the The lower part of the track groove (383) is close to the lower end of the transmission rod (381), the transmission rod (381) and the transmission block (382) extend into the first sleeve (371) and the guide groove (374) respectively, and the guide column (375) extends into the track groove (383), so that the rotating shaft (380) can drive the second sleeve (372) to rotate and drive the first sleeve (371) and the second sleeve (372) to move reciprocatingly up and down.

7. The tailwater treatment system according to claim 6, characterized in that: The transmission member (370) further comprises a limiting member, the transmission block (382) is provided with a waist-shaped hole parallel to the up-down direction, the limiting member is passed through the waist-shaped hole and connected to the inner bottom wall of the guide groove (374), and the limiting member is used to limit the transmission block (382) from falling out of the guide groove (374).

8. The tailwater treatment system according to claim 1, characterized in that: The first needle brush pump device (340) comprises a first needle brush water pump (341), a first water inlet pipe (342) and a first water outlet pipe (343); the first needle brush water pump (341) is arranged on the outer wall of the reaction chamber (310); the water inlet end of the first needle brush water pump (341) is connected to the reaction chamber (310) through the first water inlet pipe (342); one end of the first water outlet pipe (343) is connected to the water outlet end of the first needle brush water pump (341); the other end of the first water outlet pipe (343) extends into the guide tube (330) and faces the bubble agitating device (360); the first water outlet pipe (343) is connected to the output end of the air supply device (390).

9. The tailwater treatment system according to claim 1, characterized in that: The middle portion of the bottom wall of the collection cup (320) is in the shape of a frustum that gradually increases in size from top to bottom.

10. The tailwater treatment system according to claim 9, characterized in that: The protein skimmer (300) further comprises a flushing device, which is arranged in the collection cup (320) and is used to flush the foam in the collection cup (320). The collection cup (320) is provided with a drain pipe, which is close to the bottom wall of the collection cup (320) and is used to discharge the water and foam in the collection cup (320).

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