An urban sewage treatment system based on foam control technology

Abstract

The present invention discloses an urban sewage treatment system based on foam elimination and control technology, comprising: a mechanical foam elimination member, which includes an aeration tank, a foam elimination support rotating member, a foam elimination power member and a water droplet foam elimination member. The foam elimination power member drives the connected foam elimination support rotating member to rotate on the aeration tank by means of the floating sewage. The water droplet foam elimination member is driven to rotate on the foam elimination support rotating member. The rotating water droplet foam elimination member quickly fills the sewage into it and sprays water droplets from the top of the water droplet foam elimination member to form water droplets spraying towards the foam; a sludge foam elimination member, which includes a sedimentation tank, a sedimentation power member and a sludge circulation member. The sedimentation power member drives the sewage to rotate in the sedimentation tank to accelerate sedimentation. The structure of the present invention is reasonably designed, has high foam elimination efficiency, can eliminate foam formed for different reasons, is energy-saving in the foam elimination process, has low foam elimination cost, and does not generate new pollutants during the foam elimination process.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and more specifically, to an urban sewage treatment system based on foam elimination and control technology. Background Art

[0002] With the rapid development of social economy, the amount of domestic and industrial wastewater is increasing, and sewage treatment has received increasing attention. Foam is likely to be generated during the sewage treatment process, and the types and causes of the foam mainly include the following:

[0003] Biological foam: Foam formed by the abnormal growth of filamentous microorganisms (such as Nocardia and Rhodococcu bacteria) mixed with bubbles and floc particles. It has the characteristics of being stable, continuous, and difficult to control;

[0004] Denitrification foam: When the sludge sedimented in the sedimentation tank is not recycled into the aeration tank for a long time and aerated, denitrification will occur, generating nitrogen and other bubbles, which will drive part of the sludge to float, and then there will be a problem of excessive foam.

[0005] At the same time, when the sludge is transported between the aeration tank and the sedimentation tank, it is easily further crushed by the transfer pump, so that the crushed organic matter (such as vegetable leaves and greasy food) is easily attached to the rising bubbles to form foam, further increasing the foam problem.

[0006] A large amount of foam will have an adverse impact on the sewage treatment effect. Therefore, foam elimination and control must be carried out during the sewage treatment process. The common defoaming methods mainly include physical method, chemical method, and mechanical method.

[0007] The physical method mainly uses heating to change the foam tension to achieve the purpose of defoaming. Usually, a heater is used to heat the foam on the pool surface to make it break. This method has the problem of limited use environment; the chemical method mainly reduces the generation of foam by adding defoaming agents and other chemicals to achieve the purpose of defoaming. However, the cost of defoaming agents is high, and the defoaming agent itself is also a chemical agent, which will introduce new pollutants and increase the load of the sewage treatment system; the mechanical method is based on the cause of foam formation, and through reasonable structural design, the foam is pre-controlled and the formed foam is defoamed in a timely manner. Summary of the Invention

[0008] In order to overcome the above defects, the present invention provides an urban sewage treatment system based on foam elimination and control technology, and specifically adopts the following technical solutions:

[0009] An urban sewage treatment system based on foam elimination and control technology, comprising:

[0010] Mechanical defoaming component, which includes an aeration tank, a defoaming support rotating component, a defoaming power component and a water droplet defoaming component. The defoaming power component drives the connected defoaming support rotating component to rotate on the aeration tank by means of the floating sewage. The water droplet defoaming component is driven to rotate on the defoaming support rotating component. The rotating water droplet defoaming component quickly fills the sewage and sprays it from the top of the water droplet defoaming component to form water droplets spraying towards the foam.

[0011] Sludge defoaming component, which is communicated with the mechanical defoaming component. It includes a sedimentation tank, a sedimentation power component and a sludge circulation component. The sedimentation power component drives the sewage to rotate in the sedimentation tank to accelerate sedimentation. The sludge circulation component scrapes and transfers the sludge at the bottom of the sedimentation tank layer by layer from the bottom to the aeration tank in the sedimentation tank.

[0012] Preferably, the defoaming support rotating component includes a defoaming support component and a defoaming rotating component. The defoaming support component is arranged on the aeration tank, and the defoaming rotating component is arranged on the defoaming support component. The defoaming support component includes a defoaming support frame and a rotating bearing. The defoaming support frame is arranged on the aeration tank, and the rotating bearing is arranged on the defoaming support frame. The defoaming rotating component includes a defoaming rotating pipe and a defoaming rotating seat. The defoaming rotating seat is fixedly arranged on the bottom surface of the aeration tank. One end of the defoaming rotating pipe passes through the rotating bearing and is embedded in the defoaming rotating seat.

[0013] Preferably, the defoaming power component includes a rotation start-stop component and a rotation power component. The rotation start-stop component is arranged on the defoaming rotating component, and the rotation power component is arranged on the rotation start-stop component. The rotation start-stop component includes a first motor, a screw rod and a rotating pipe. The first motor is fixedly arranged on the other end of the defoaming rotating pipe. One end of the screw rod is connected to the rotating shaft of the first motor. The other end of the screw rod penetrates into the defoaming rotating pipe. The rotating pipe is sleeved on the screw rod, and the internal thread on the inner wall of the rotating pipe cooperates with the screw rod. The rotation power component includes a connecting piece and a paddle. One end of the connecting piece passes through the rotating long strip through hole on the wall of the defoaming rotating pipe and is arranged on the rotating pipe, and the connecting piece can move axially along the rotating pipe in the rotating long strip through hole. One end of the paddle is arranged on the other end of the connecting piece.

[0014] Preferably, the water droplet defoaming component includes a defoaming relay pipe, a defoaming diversion pipe and a water droplet component. The defoaming relay pipe is in a spiral tubular shape. The defoaming relay pipe is sleeved on the defoaming rotating pipe, and a reducing pipe is connected through the bottom port of the defoaming relay pipe. The two defoaming relay pipes are evenly distributed along the circumferential direction of the defoaming rotating pipe.

[0015] Preferably, one end of the defoaming diversion pipe is arranged on the defoaming rotating pipe, and one end side wall of the defoaming diversion pipe communicates with the other end of the defoaming relay pipe; a flow guiding through hole is arranged on the side wall of the defoaming diversion pipe, and a plurality of the flow guiding through holes are uniformly distributed along the axial direction of the defoaming diversion pipe; the water droplet member includes a water droplet support and a water droplet splashing disc, the water droplet support is in an L shape, one end of the water droplet support is vertically and fixedly arranged on the defoaming diversion pipe, the water droplet splashing disc is horizontally arranged on the other end of the water droplet support, and a plurality of the water droplet members correspond to a plurality of the flow guiding through holes one by one.

[0016] Preferably, the sedimentation power member includes a second motor, a sedimentation rotating shaft, a sedimentation rotating seat and a sedimentation power paddle, the second motor is fixedly arranged on the top surface of the sedimentation tank, and the sedimentation rotating seat is fixedly arranged on the sludge circulation member; one end of the sedimentation rotating shaft penetrates through the top surface of the sedimentation tank and is embedded in the sedimentation rotating seat, a first worm gear is fixedly sleeved on the other end of the sedimentation rotating shaft, a first worm is fixedly connected to the rotating shaft of the second motor, and the first worm meshes with the first worm gear; the sedimentation power paddle is horizontally arranged on the sedimentation rotating shaft.

[0017] Preferably, the sludge circulation member includes a sludge circulation protective shell, a sludge collection power member, a sludge collection relay pipe and a sludge collection opening and closing member, the sludge circulation protective shell and the sludge collection power member are both arranged in the sedimentation tank, the sludge collection relay pipe is arranged on the sludge circulation protective shell, and the sludge collection opening and closing member is arranged on the sludge collection relay pipe; the bottom end of the sludge circulation protective shell is arranged on the bottom surface of the sedimentation tank, and the sludge circulation protective shell can rotate circumferentially in the sedimentation tank; a sealing ring is arranged between the outer wall of the sludge circulation protective shell and the inner wall of the sedimentation tank.

[0018] Preferably, the sludge collection power member includes a third motor and a gear, the third motor is arranged on the outer wall of the sedimentation tank, the gear is fixedly arranged on the rotating shaft of the third motor, and the gear penetrates through the sedimentation tank and meshes with the teeth on the side wall of the sludge circulation protective shell; the teeth are distributed circumferentially around the sludge circulation protective shell; the sludge collection relay pipe is in a shape of a spiral wire pipe, and the size of one port of the sludge collection relay pipe is larger than that of the other port; the sludge collection relay pipe is fixedly embedded in the sludge circulation protective shell, a collection through hole is arranged on the top surface of the sludge circulation protective shell directly above one port of the sludge collection relay pipe, and the size of the collection through hole is not less than that of one port of the sludge collection relay pipe; two sludge collection relay pipes are uniformly distributed circumferentially in the sludge circulation protective shell, and the other ends of the two sludge collection relay pipes are simultaneously communicated and connected with one end of a sludge circulation relay pipe; the other end of the sludge circulation relay pipe is embedded in one end of a sludge return pipe.

[0019] Preferably, the sludge collection opening and closing member includes a sludge collection opening and closing door and a sludge collection opening and closing power member. The sludge collection opening and closing door is arranged on the sludge collection relay pipe, and the sludge collection opening and closing power member is arranged on the sludge circulation protection shell; the sludge collection opening and closing door includes an opening and closing door and a door sealing connecting member. One side edge of the opening and closing door is hinged to one side edge of one port of the sludge collection relay pipe, and a plurality of the opening and closing doors are evenly distributed along the length direction of one port of the sludge collection relay pipe; the door sealing connecting member includes a support buffer member, a support wire and a sludge shielding surface. The support buffer member and the sludge shielding surface are both arranged on the opening and closing door, and the support wire is arranged on the support buffer member; the support buffer member includes a support fixing pipe and a buffer spring, and two of the support buffer members are symmetrically distributed on two adjacent opening and closing doors respectively; one end of the support wire penetrates through one end of the support fixing pipe and then extends into the support fixing pipe, and one end of the support wire is connected with a first force application block, and the first force application block is located between the other end surface of the support fixing pipe and one end of the buffer spring; the other end of the support wire penetrates through one end of another adjacent support fixing pipe and then extends into the support fixing pipe, and the other end of the support wire is fixedly connected with a second force application block; two side edges of the sludge shielding surface are respectively correspondingly connected to two adjacent opening and closing surfaces.

[0020] Preferably, the sludge collection opening and closing power member includes a fourth motor, a first bevel gear, a power relay rod, a second bevel gear, a second worm, a transmission rotating shaft, a second worm gear, a first transmission rod and a second transmission rod. The fourth motor is arranged in the sludge circulation protection shell, the first bevel gear is arranged on the rotating shaft of the fourth motor, the second bevel gear is arranged on one end of the power relay rod, and the second bevel gear meshes with the first bevel gear; the second worm is connected to the other end of the power relay rod, the transmission rotating shaft is arranged on the sludge circulation protection shell through a rotating shaft support seat, the second worm gear is sleeved on the transmission rotating shaft, and the second worm gear meshes with the second worm; one end of the first transmission rod is arranged on the transmission rotating shaft, and a plurality of the first transmission rods correspond to a plurality of the opening and closing doors one by one; the lengths of the plurality of the first transmission rods are all different, so that the closer the first transmission rod is to the axis of the sludge circulation protection shell, the smaller the length of the first transmission rod; one end of the second transmission rod is hinged to the other end of the first transmission rod, and a dovetail block is arranged at the other end of the second transmission rod, and the dovetail block is matched with a dovetail groove on the opening and closing door.

[0021] The present invention has at least the following beneficial effects:

[0022] 1) The structural design of the urban sewage treatment system based on the foam elimination and control technology of the present invention is reasonable, with high defoaming efficiency. It can defoam the foam formed for different reasons, the defoaming process is energy-saving, the defoaming cost is low, and no new pollutants will be generated during the defoaming process;

[0023] 2) The urban sewage treatment system based on the foam elimination and control technology of the present invention is provided with a sedimentation tank and a sludge circulation member. The sludge circulation member can scrape and transfer the sludge deposited at the bottom of the sedimentation tank layer by layer from the bottom to the aeration tank, preventing the sludge at the bottom of the sedimentation tank from forming dead corners and being unable to be transferred to the aeration tank in time, resulting in problems such as the generation of nitrogen and other bubbles and driving some sludge to float up to form too much foam;

[0024] 3) The urban sewage treatment system based on the foam elimination and control technology of the present invention is provided with a sludge circulation protective shell, a sludge collection power member, a sludge collection relay pipe and a sludge collection opening and closing member. The sludge collection opening and closing member and the sludge collection relay pipe cooperate to scrape and extrude the sludge at the bottom of the sedimentation tank layer by layer from the bottom into the sludge collection relay pipe. Since the sludge collection relay pipe is in a spiral tube shape, the rotating sludge collection relay pipe can automatically squeeze the sludge into the aeration tank without pumping it into the aeration tank, preventing the organic matter in the sludge from further pulverizing and adhering to the rising bubbles to form foam;

[0025] 4) The urban sewage treatment system based on the foam elimination and control technology of the present invention is provided with an aeration tank, a defoaming support rotating member, a defoaming power member and a water droplet defoaming member. The defoaming power member drives the defoaming support rotating member to rotate in the aeration tank by the buoyant and tumbling sewage, and the rotating defoaming support rotating member drives the water droplet defoaming member to rotate in the sewage, and then quickly fills the sewage and sprays it from the top of the water droplet defoaming member to form water droplets for defoaming, significantly reducing the defoaming cost in the aeration tank and providing defoaming efficiency.

[0026] Other advantages, objectives and features of the present invention will be partially reflected by the following description and partially understood by those skilled in the art through the research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is the front view of the mechanical defoaming member in the urban sewage treatment system based on the foam elimination and control technology of the present invention;

[0028] Figure 2 It is the three-dimensional structure schematic diagram of the mechanical defoaming member in the urban sewage treatment system based on the foam elimination and control technology of the present invention;

[0029] Figure 3 It is the front view of the sludge defoaming member in the urban sewage treatment system based on the foam elimination and control technology of the present invention;

[0030] Figure 4 The top view of the sludge defoaming part in the urban sewage treatment system based on the foam control technology of the present invention;

[0031] Figure 5 The three-dimensional structure diagram of the sludge defoaming part in the urban sewage treatment system based on the foam control technology of the present invention;

[0032] Figure 6 The urban sewage treatment system based on the foam control technology of the present invention Figure 3 The three-dimensional structure diagram of the sectional view in the A-A direction in the system;

[0033] Figure 7 The urban sewage treatment system based on the foam control technology of the present invention Figure 3 The three-dimensional structure diagram of the sectional view in the B-B direction in the system;

[0034] Figure 8 The urban sewage treatment system based on the foam control technology of the present invention Figure 4 The three-dimensional structure diagram of the sectional view in the C-C direction in the system;

[0035] Figure 9 The three-dimensional structure diagram of the door closing connecting part in the urban sewage treatment system based on the foam control technology of the present invention.

[0036] Wherein: 1 - aeration tank, 2 - defoaming support frame, 3 - rotating bearing, 4 - defoaming rotating pipe, 6 - first motor, 7 - screw rod, 8 - rotating pipe, 9 - connecting part, 10 - paddle, 11 - rotating long strip through hole, 12 - defoaming relay pipe, 13 - defoaming guide pipe, 14 - water droplet support, 15 - water droplet splash plate, 16 - sedimentation tank, 17 - second motor, 18 - sedimentation rotating shaft, 19 - sedimentation rotating seat, 20 - sedimentation power paddle, 21 - first worm gear, 22 - first worm, 23 - sludge circulation protective shell, 24 - sludge collection relay pipe, 25 - third motor, 26 - gear, 27 - collection through hole, 28 - sludge circulation relay pipe, 29 - opening and closing door, 30 - support buffer part, 31 - support steel wire, 32 - fourth motor, 34 - power relay rod, 35 - second bevel gear, 37 - transmission rotating shaft, 39 - first transmission rod, 40 - second transmission rod. Detailed implementation manners

[0037] Hereinafter, the technical solution of the present invention will be described in detail by way of examples with reference to the accompanying drawings. It should be noted here that the description of these example embodiments is for helping to understand the present invention, but does not constitute a limitation to the present invention.

[0038] In this text, the term "and / or" only describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, B exists alone, and both A and B exist simultaneously. The term " / and" in this text describes another relationship of associated objects, indicating that there can be two relationships. For example, A / and B can represent two situations: A exists alone, and both A and B exist. Additionally, the character " / " in this text generally indicates that the associated objects before and after are in an "or" relationship.

[0039] According to Figures 1-9 As shown, an urban sewage treatment system based on foam elimination and control technology includes a mechanical defoaming component and a sludge defoaming component, and the sludge defoaming component is connected to the mechanical defoaming component. The mechanical defoaming component includes an aeration tank 1, a defoaming support rotating component, a defoaming power component, and a water droplet defoaming component. The defoaming support rotating component is arranged on the aeration tank 1, and the defoaming power component and the water droplet defoaming component are both arranged on the defoaming support rotating component. The defoaming support rotating component includes a defoaming support component and a defoaming rotating component. The defoaming support component is arranged on the aeration tank 1, and the defoaming rotating component is arranged on the defoaming support component. The defoaming support component includes a defoaming support frame 2 and a rotating bearing 3. The defoaming support frame 2 is arranged on the aeration tank 1, and the rotating bearing 3 is arranged on the defoaming support frame 2. The defoaming support frame 2 is in the shape of a right-angle rod. One end of the defoaming support frame 2 is vertically and fixedly arranged on the side wall of the aeration tank 1, and the axis of the other end of the defoaming support frame 2 is parallel to the radial line of the aeration tank 1. The four defoaming support frames 2 are evenly distributed circumferentially around the aeration tank 1. The rotating bearing 3 is fixedly arranged on the other ends of the plurality of defoaming support frames 2, and the axis of the rotating bearing 3 coincides with the axis of the aeration tank 1.

[0040] The defoaming rotating component includes a defoaming rotating pipe 4 and a defoaming rotating seat. The defoaming rotating seat is arranged on the aeration tank 1, and the defoaming rotating pipe 4 is arranged on the defoaming rotating seat. The defoaming rotating seat is in the shape of a circular groove and is fixedly arranged at the center of the bottom surface of the aeration tank 1, and the axis of the defoaming rotating seat coincides with the axis of the rotating bearing 3. One end of the defoaming rotating pipe 4 passes through the rotating bearing 3 and is installed in the defoaming rotating seat, and the defoaming rotating pipe 4 can rotate in the defoaming rotating seat and the rotating bearing 3.

[0041] The defoaming power part includes a rotating start-stop part and a rotating power part. The rotating start-stop part is arranged on the defoaming rotating part, and the rotating power part is arranged on the rotating start-stop part. The rotating start-stop part includes a first motor 6, a screw 7 and a rotating tube 8. The first motor 6 is fixedly arranged on the other end of the defoaming rotating tube 4. One end of the screw 7 is fixedly connected to the rotating shaft of the first motor 6. The other end of the screw 7 penetrates into the defoaming rotating tube 4, and the axis of the screw 7 coincides with the axis of the defoaming rotating tube 4. At the same time, the first motor 6 can drive the screw 7 to rotate in the defoaming rotating tube 4. The rotating tube 8 is sleeved on the screw 7, and the internal thread on the inner wall of the rotating tube 8 cooperates with the screw 7. The rotating power part includes a connecting part 9 and a paddle 10. One end of the connecting part 9 passes through the rotating long strip through hole 11 on the wall of the defoaming rotating tube 4 and is horizontally fixed on the rotating tube 8. The connecting part 9 can move axially along the rotating tube 8 in the rotating long strip through hole 11. The two connecting pieces 9 are symmetrically distributed on the rotating tube 8. One end of the paddle 10 is horizontally fixed on the other end of the connecting piece 9, and the two paddles 10 correspond to the two connecting pieces 9 one by one. Then, the sewage in the aeration tank 1 that is driven to float by the bubbles pushes the paddle 10 to rotate around the axis of the defoaming rotating tube 4, and the rotating paddle 10 drives the defoaming rotating tube 4 to rotate in the defoaming rotating seat and the rotating bearing 3 through the connecting piece 9. When there is no foam in the aeration tank 1, start the first motor 6 to drive the screw 7 to rotate forward, and the screw 7 drives the rotating tube 8 to move axially along the screw 7, and the rotating tube 8 drives the paddle 10 to move upward through the connecting piece 9 until the paddle 10 is separated from the sewage surface. When it is necessary to eliminate the foam, start the first motor 6 to drive the screw 7 to rotate in the opposite direction.

[0042] The water droplet defoaming member includes a defoaming relay pipe 12, a defoaming diversion pipe 13 and a water droplet member. The defoaming relay pipe 12 and the defoaming diversion pipe 13 are both arranged on the defoaming rotating pipe 4, and the water droplet member is arranged on the defoaming diversion pipe 13. The defoaming relay pipe 12 is in a spiral tubular shape. The defoaming relay pipe 12 is fixedly sleeved on the defoaming rotating pipe 4, and a reducing pipe (not shown in the figure) is connected through the bottom port of the defoaming relay pipe 12. The small end of the reducing pipe communicates with the bottom port of the defoaming relay pipe 12, and the side wall of the reducing pipe is fixedly connected with the side wall of the defoaming rotating pipe 4. At the same time, the axis of the reducing pipe is horizontal. To increase the installation stability of the reducing pipe and increase the projected area of the large head port of the reducing pipe. Further, when the defoaming relay pipe 12 rotates circumferentially with the defoaming rotating pipe 4, the reducing pipe can be driven to rotate circumferentially in the sewage, so that the sewage enters the defoaming relay pipe 12 from the reducing pipe. Specifically, since the reducing pipe moves relative to the sewage in the sewage, the sewage can enter one end of the defoaming relay pipe 12 through the large head of the reducing pipe and spray out from the other end of the defoaming relay pipe 12. There are two defoaming relay pipes 12, and the two defoaming relay pipes 12 are evenly distributed along the circumferential direction of the defoaming rotating pipe 4.

[0043] One end of the defoaming diversion pipe 13 is horizontally and fixedly arranged on the defoaming rotating pipe 4, and the side wall of one end of the defoaming diversion pipe 13 communicates with the other end of the defoaming relay pipe 12. The side wall of the defoaming diversion pipe 13 is provided with a flow guiding through hole, and the opening direction of the flow guiding through hole is downward. A plurality of the flow guiding through holes are evenly distributed along the axial direction of the defoaming diversion pipe 13. So that the waste water in the defoaming relay pipe 12 can enter the defoaming diversion pipe 13 and finally spray out from the flow guiding through holes.

[0044] The water droplet member includes a water droplet bracket 14 and a water droplet splash plate 15. The water droplet bracket 14 is in an L shape. One end of the water droplet bracket 14 is vertically and fixedly arranged on the defoaming diversion pipe 13. The water droplet splash plate 15 is horizontally arranged on the other end of the water droplet bracket 14, and the axis of the water droplet splash plate 15 coincides with the axis of the flow guiding through hole. There are a plurality of the water droplet members, and the plurality of water droplet members correspond to the plurality of flow guiding through holes one by one. So that the water column flowing out from the flow guiding through holes impacts on the water droplet splash plate 15 to break the water column into water droplets, thereby defoaming the foam on the surface of the sewage.

[0045] The sludge defoaming component includes a sedimentation tank 16, a sedimentation power component, and a sludge circulation component. The sedimentation power component and the sludge circulation component are both arranged on the sedimentation tank 16. The sedimentation power component includes a second motor 17, a sedimentation rotating shaft 18, a sedimentation rotating seat 19, and sedimentation power paddles 20. The second motor 17 is fixedly arranged on the top surface of the sedimentation tank 16. The sedimentation rotating seat 19 is in a circular groove shape and is fixedly arranged on the sludge circulation component. And the axis of the sedimentation rotating seat 19 coincides with the axis of the sedimentation tank 16. One end of the sedimentation rotating shaft 18 penetrates through the top surface of the sedimentation tank 16 and is embedded in the sedimentation rotating seat 19. A first worm gear 21 is fixedly sleeved on the other end of the sedimentation rotating shaft 18. A first worm 22 is fixedly connected to the rotating shaft of the second motor 17. The first worm 22 meshes with the first worm gear 21. The sedimentation power paddles 20 are in a rectangular plate shape and are horizontally and fixedly arranged on the sedimentation rotating shaft 18. The two sedimentation power paddles 20 are evenly distributed circumferentially around the sedimentation rotating shaft 18. The second motor 17 drives the sedimentation rotating shaft 18 to rotate in the sedimentation tank 16 through the first worm gear 21 and the first worm 22. The sedimentation rotating shaft 18 drives the sedimentation power paddles 20 to rotate. The sedimentation power paddles 20 located in the sewage drive the sewage to rotate in the sedimentation tank 16. The rotating sewage will accelerate the sedimentation speed under the action of centrifugal force.

[0046] The sludge circulation component includes a sludge circulation protective shell 23, a sludge collection power component, a sludge collection relay pipe 24, and a sludge collection opening and closing component. The sludge circulation protective shell 23 and the sludge collection power component are both arranged in the sedimentation tank 16. The sludge collection relay pipe 24 is arranged on the sludge circulation protective shell 23. The sludge collection opening and closing component is arranged on the sludge collection relay pipe 24. The sludge circulation protective shell 23 is in a tubular shape. The outer diameter of the sludge circulation protective shell 23 is not greater than the inner diameter of the sedimentation tank 16. The bottom end of the sludge circulation protective shell 23 is arranged on the bottom surface of the sedimentation tank 16. And the sludge circulation protective shell 23 can rotate circumferentially in the sedimentation tank 16. Further, a ball installation ring is arranged on the outer side surface of the bottom surface of the sludge circulation protective shell 23. The axis of the ball installation ring coincides with the axis of the sludge circulation protective shell 23. A plurality of balls are evenly distributed and embedded in the ball installation ring. The sludge circulation protective shell 23 is embedded in the rotation groove on the inner side surface of the bottom surface of the sedimentation tank 16 through the ball installation ring. And the balls abut against the bottom of the rotation groove. At the same time, the axis of the rotation groove coincides with the axis of the sedimentation tank 16. So that the sludge circulation protective shell 23 rotates circumferentially in the sedimentation tank 16 through the balls. A sealing ring is arranged between the outer wall of the sludge circulation protective shell 23 and the inner wall of the sedimentation tank 16 to prevent the precipitated sludge from entering the gap between the outer wall of the sludge circulation protective shell 23 and the inner wall of the sedimentation tank 16.

[0047] The sludge collection power component includes a third motor 25 and a gear 26. The third motor 25 is fixedly arranged on the outer wall of the sedimentation tank 16. The gear 26 is fixedly arranged on the rotating shaft of the third motor 25, and the gear 26 penetrates through the sedimentation tank 16 and meshes with the teeth on the side wall of the sludge circulation protective shell 23. The teeth are circumferentially distributed around the sludge circulation protective shell 23. Further, in order to further improve the sealing performance of the bottom of the sedimentation tank 16, a gear protective shell (not shown in the figure) is sleeved outside the gear 26. The gear protective shell is hermetically closed outside the penetration opening of the gear 26 on the sedimentation tank 16 to prevent the sewage after breaking through the sealing ring from overflowing from this penetration. The third motor 25 drives the sludge circulation protective shell 23 to rotate circumferentially in the sedimentation tank 16 through the gear 26.

[0048] The sludge collection relay pipe 24 is in the shape of a spiral tube, and the cross-sectional dimension of one end of the sludge collection relay pipe 24 is larger than that of the other end. The sludge collection relay pipe 24 is fixedly embedded in the sludge circulation protection shell 23, and the axis of the sludge collection relay pipe 24 coincides with the axis of the sludge circulation protection shell 23. At the same time, the length direction of one port of the sludge collection relay pipe 24 is parallel to a radial line of the sludge circulation protection shell 23. Further, the length of one port of the sludge collection relay pipe 24 is greater than two-thirds of the radius of the sludge rotation protection shell, so as to radially collect the sludge deposited on the top surface of the sludge rotation protection shell. To prevent sludge from accumulating at the bottom of the sedimentation tank 16 for a long time and being unable to be circulated and discharged, resulting in the generation of nitrogen and other bubbles in the sludge and driving some sludge to float to form foam. A collection through hole 27 is provided on the top surface of the sludge circulation protection shell 23 directly above one port of the sludge collection relay pipe 24, and the size of the collection through hole 27 is not less than the size of one port of the sludge collection relay pipe 24. There are two sludge collection relay pipes 24, and the two sludge collection relay pipes 24 are evenly distributed circumferentially in the sludge circulation protection shell 23, and the other ends of the two sludge collection relay pipes 24 are simultaneously connected in through connection with one end of the sludge circulation relay pipe 28. The other end of the sludge circulation relay pipe 28 sequentially penetrates the bottom surface of the sludge circulation protection shell 23 and the sedimentation tank 16 and is then embedded in one end of the sludge return pipe. The other end of the sludge return pipe is connected to the aeration tank 1 in through connection. The sludge collection relay pipe 24 rotating with the sludge circulation protection shell 23 collects sludge from one end of the sludge collection relay pipe 24 into the sludge collection relay pipe 24, and as the sludge collection relay pipe 24 continues to rotate, the sludge is extruded from the other end of the sludge collection relay pipe 24 into the sludge circulation relay pipe 28. The sludge circulation relay pipe 28 sends the sludge into the sludge return pipe, and the sludge return pipe transports most of the sludge into the aeration tank 1 and discharges a small part of the remaining sludge. Further, the sludge circulation relay pipe 28 can rotate circumferentially relative to the sedimentation tank 16 and the sludge return pipe. Since the sludge in the sedimentation tank 16 is sent into the aeration tank 1 by the spiral tube-shaped sludge collection relay pipe 24 in an extrusion manner, the further pulverization of organic substances (vegetable leaves and oil-containing substances) in the sludge is significantly reduced, and the formation of foam on the floating bubbles after the sludge enters the aeration tank 1 is significantly reduced.

[0049] The sludge collection opening and closing member includes a sludge collection opening and closing door and a sludge collection opening and closing power member. The sludge collection opening and closing door is arranged on the sludge collection relay pipe 24, and the sludge collection opening and closing power member is arranged on the sludge circulation protection shell 23. The sludge collection opening and closing door includes an opening and closing door 29 and a door sealing connecting member. The opening and closing door 29 is arranged on the sludge collection relay pipe 24, and the door sealing connecting member is arranged on the opening and closing door 29. One side of the opening and closing door 29 is hinged to one side of the port of the sludge collection relay pipe 24, and the four opening and closing doors 29 are equally spaced along the length direction of the port of the sludge collection relay pipe 24.

[0050] The door sealing connecting member includes a support buffer member 30, a support wire 31 and a sludge shielding surface. The support buffer member 30 and the sludge shielding surface are both arranged on the opening and closing door 29, and the support wire 31 is arranged on the support buffer member 30. The support buffer member 30 includes a support fixing pipe and a buffer spring. The support fixing pipe is fixedly arranged on one opening and closing door 29, and the buffer spring is installed in the support fixing pipe. There are two support buffer members 30, and the two support buffer members 30 are symmetrically distributed on two adjacent opening and closing doors 29 respectively. One end of the support wire 31 penetrates through one end of the support fixing pipe and then extends into the support fixing pipe, and one end of the support wire 31 is fixedly connected with a first force application block. The size of the first force application block is larger than the inner diameter of the buffer spring, and at the same time, the first force application block is located between the other end surface of the support fixing pipe and one end of the buffer spring. The other end of the support wire 31 penetrates through one end of the adjacent support fixing pipe and then extends into the support fixing pipe, and the other end of the support wire 31 is fixedly connected with a second force application block, and at the same time, the second force application block is located between the other end surface of the support fixing pipe and one end of the buffer spring. The sludge shielding surface has a shrinking function, and two sides of the sludge shielding surface are respectively connected to adjacent opening and closing surfaces. Further, the sludge shielding surface is made of a rubber band clamped between two layers of waterproof cloth. When the sludge shielding surface is not stressed, it is in a wrinkled and shrunk state, and when the sludge shielding surface is pulled from both sides, the shielding area of the sludge shielding surface can be extended. As an option, the waterproof cloth on both sides of the sludge shielding surface covers the support wire 31 to improve the corrosion resistance of the support wire 31.

[0051] The sludge collection opening and closing power component includes a fourth motor 32, a first bevel gear, a power relay rod 34, a second bevel gear 35, a second worm, a transmission rotating shaft 37, a second worm gear, a first transmission rod 39 and a second transmission rod 40. The fourth motor 32 is fixedly arranged in the sludge circulation protection shell 23, and the rotating shaft of the fourth motor 32 penetrates through the top surface of the sludge circulation protection shell 23. The first bevel gear is fixedly arranged on the rotating shaft of the fourth motor 32. The second gear wheel is fixedly arranged at one end of the power relay rod 34, and the second bevel gear 35 meshes with the first bevel gear. The second worm is fixedly connected to the other end of the power relay rod 34. The transmission rotating shaft 37 is fixedly arranged on the sludge circulation protection shell 23 through a rotating shaft support seat, and the transmission rotating shaft 37 can rotate circumferentially on the rotating shaft support seat. At the same time, the axis of the transmission rotating shaft 37 is parallel to a radial line of the sludge circulation protection shell 23. The second worm gear is fixedly sleeved on the transmission rotating shaft 37, and the second worm gear meshes with the second worm. One end of the first transmission rod 39 is vertically and fixedly arranged on the transmission rotating shaft 37, and the four first transmission rods 39 correspond to the four opening and closing doors 29 one by one. The lengths of the four first transmission rods 39 are all different to control the opening angles of the four opening and closing doors 29. The lengths of the four first transmission rods 39 gradually become shorter according to the distance from the axis of the sludge circulation protection shell 23. That is, the opening and closing door 29 closer to the axis of the sludge circulation protection shell 23 is controlled by the first transmission rod 39 to have a smaller opening angle. One end of the second transmission rod 40 is hinged to the other end of the first transmission rod 39, and a dovetail block is arranged at the other end of the second transmission rod 40. The dovetail block cooperates with the dovetail groove on the opening and closing door 29. The four second transmission rods 40 correspond to the four first transmission rods 39 and the four opening and closing doors 29 one by one.

[0052] When the transmission rotating shaft 37 drives the four first transmission rods 39 to rotate circumferentially, due to the different lengths of the four first transmission rods 39, the horizontal displacements of the other ends of the four first transmission rods 39 are different. Furthermore, the opening angles of the four opening and closing doors 29 opened by the second transmission rods 40 are different. Due to the action of centripetal force on the sludge in the sedimentation tank 16, the thickness of the sludge deposited on the top surface of the sludge circulation protection shell 23 gradually becomes thinner from the edge to the center. Therefore, controlling the opening angles of the four opening and closing doors 29 to become smaller from the edge to the center is more conducive to evenly transporting the bottom sludge to the aeration tank 1, preventing the bottom sludge from staying for too long. At the same time, when the sludge sediment is relatively thin, controlling the opening angles of the four opening and closing doors 29 to become smaller in sequence can prevent sewage from entering the sludge collection relay pipe 24 together with the sludge, thereby diluting the sludge, reducing the sludge transfer efficiency and the accuracy of sludge transfer, and preventing the generation of foam due to the small amount of sludge transferred into the aeration tank 1.

[0053] When the sludge transportation is not required, it is only necessary to close the four opening and closing doors on the collection through holes.

[0054] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the examples shown and described herein.

Claims

1. An urban sewage treatment system based on foam elimination and control technology, characterized in that, Comprising: A mechanical defoaming component, which includes an aeration tank, a defoaming support rotating component, a defoaming power component and a water droplet defoaming component. The defoaming power component drives the connected defoaming support rotating component to rotate on the aeration tank by means of the floating sewage. The water droplet defoaming component is driven to rotate on the defoaming support rotating component. The rotating water droplet defoaming component quickly fills the sewage and sprays water droplets from the top of the water droplet defoaming component to form water droplets spraying towards the foam; A sludge defoaming component, which is communicated with the mechanical defoaming component and includes a sedimentation tank, a sedimentation power component and a sludge circulation component. The sedimentation power component drives the sewage to rotate in the sedimentation tank to accelerate sedimentation. The sludge circulation component scrapes and transfers the sludge at the bottom of the sedimentation tank layer by layer from the bottom to the aeration tank in the sedimentation tank; The sludge circulation component includes a sludge circulation protective shell, a sludge collection power component, a sludge collection relay pipe and a sludge collection opening and closing component. The sludge circulation protective shell and the sludge collection power component are both arranged in the sedimentation tank. The sludge collection relay pipe is arranged on the sludge circulation protective shell. The sludge collection opening and closing component is arranged on the sludge collection relay pipe; The bottom end of the sludge circulation protective shell is arranged on the bottom surface of the sedimentation tank, and the sludge circulation protective shell can rotate circumferentially in the sedimentation tank; A sealing ring is arranged between the outer wall of the sludge circulation protective shell and the inner wall of the sedimentation tank; The sludge collection power component includes a third motor and a gear. The third motor is arranged on the outer wall of the sedimentation tank. The gear is fixedly arranged on the rotating shaft of the third motor, and the gear penetrates through the sedimentation tank and meshes with the teeth on the side wall of the sludge circulation protective shell; The teeth are distributed circumferentially around the sludge circulation protective shell; The sludge collection relay pipe is in a spiral tube shape, and the size of one port of the sludge collection relay pipe is larger than that of the other port; The sludge collection relay pipe is fixedly embedded in the sludge circulation protective shell. A collection through hole is arranged on the top surface of the sludge circulation protective shell directly above one port of the sludge collection relay pipe, and the size of the collection through hole is not less than the size of one port of the sludge collection relay pipe; Two of the sludge collection relay pipes are evenly distributed circumferentially in the sludge circulation protective shell, and the other ends of the two sludge collection relay pipes are simultaneously connected through and communicated with one end of a sludge circulation relay pipe; The other end of the sludge circulation relay pipe is embedded in one end of a sludge return pipe.

2. The urban sewage treatment system based on the foam extinguishing and control technology according to claim 1, wherein The defoaming support rotating component includes a defoaming support component and a defoaming rotating component. The defoaming support component is arranged on the aeration tank, and the defoaming rotating component is arranged on the defoaming support component; The defoaming support component includes a defoaming support frame and a rotating bearing. The defoaming support frame is arranged on the aeration tank, and the rotating bearing is arranged on the defoaming support frame; The defoaming rotating component includes a defoaming rotating pipe and a defoaming rotating seat. The defoaming rotating seat is fixedly arranged on the bottom surface of the aeration tank, and one end of the defoaming rotating pipe passes through the rotating bearing and is embedded in the defoaming rotating seat.

3. The urban sewage treatment system based on the foam extinguishing and control technology according to claim 2, wherein The defoaming power component includes a rotation start-stop component and a rotation power component. The rotation start-stop component is arranged on the defoaming rotating component, and the rotation power component is arranged on the rotation start-stop component; the rotation start-stop component includes a first motor, a screw rod and a rotating pipe. The first motor is fixedly arranged on the other end of the defoaming rotating pipe. One end of the screw rod is connected to the rotating shaft of the first motor, and the other end of the screw rod penetrates into the defoaming rotating pipe. The rotating pipe is sleeved on the screw rod, and the internal thread on the inner wall of the rotating pipe cooperates with the screw rod; the rotation power component includes a connecting component and a paddle. One end of the connecting component passes through the rotation long-strip through hole on the wall of the defoaming rotating pipe and is arranged on the rotating pipe, and the connecting component can move axially along the rotating pipe in the rotation long-strip through hole; one end of the paddle is arranged on the other end of the connecting component.

4. The urban sewage treatment system based on foam extinguishing and control technology according to claim 3, characterized in that The water droplet defoaming component includes a defoaming relay pipe, a defoaming diversion pipe and a water droplet component. The defoaming relay pipe is in a spiral tubular shape. The defoaming relay pipe is sleeved on the defoaming rotating pipe, and a reducing pipe is connected through the bottom port of the defoaming relay pipe; the two defoaming relay pipes are evenly distributed along the circumferential direction of the defoaming rotating pipe.

5. The urban sewage treatment system based on the foam extinguishing and control technology according to claim 4, characterized in that One end of the defoaming diversion pipe is arranged on the defoaming rotating pipe, and one side wall of one end of the defoaming diversion pipe communicates with the other end of the defoaming relay pipe; a diversion through hole is arranged on the side wall of the defoaming diversion pipe, and a plurality of the diversion through holes are evenly distributed along the axial direction of the defoaming diversion pipe; the water droplet component includes a water droplet support and a water droplet splash disc. The water droplet support is in an L shape. One end of the water droplet support is vertically and fixedly arranged on the defoaming diversion pipe, and the water droplet splash disc is horizontally arranged on the other end of the water droplet support. A plurality of the water droplet components correspond to a plurality of the diversion through holes one by one.

6. The urban sewage treatment system based on foam control technology according to claim 5, characterized in that, The precipitation power component includes a second motor, a precipitation rotating shaft, a precipitation rotating seat and a precipitation power paddle. The second motor is fixedly arranged on the top surface of the sedimentation tank, and the precipitation rotating seat is fixedly arranged on the sludge circulation component; one end of the precipitation rotating shaft penetrates through the top surface of the sedimentation tank and is embedded in the precipitation rotating seat, and a first worm gear is fixedly sleeved on the other end of the precipitation rotating shaft. A first worm is fixedly connected to the rotating shaft of the second motor, and the first worm meshes with the first worm gear; the precipitation power paddle is horizontally arranged on the precipitation rotating shaft.

7. The urban sewage treatment system based on foam control technology according to claim 6, characterized in that, The sludge collection opening and closing component includes a sludge collection opening and closing door and a sludge collection opening and closing power component. The sludge collection opening and closing door is arranged on the sludge collection relay pipe, and the sludge collection opening and closing power component is arranged on the sludge circulation protection shell; the sludge collection opening and closing door includes an opening and closing door and a door sealing connecting component. One side edge of the opening and closing door is hinged to one side edge of one port of the sludge collection relay pipe, and a plurality of the opening and closing doors are equally spaced along the length direction of one port of the sludge collection relay pipe; the door sealing connecting component includes a support buffer component, a support steel wire and a sludge shielding surface. The support buffer component and the sludge shielding surface are both arranged on the opening and closing door, and the support steel wire is arranged on the support buffer component; The support and buffer member includes a support fixing tube and a buffer spring. The two support and buffer members are symmetrically distributed on two adjacent opening and closing doors respectively; One end of the support wire penetrates through one end of the support fixing tube and extends into the support fixing tube, and a first force application block is connected to one end of the support wire. The first force application block is located between the other end face of the support fixing tube and one end of the buffer spring; the other end of the support wire penetrates through one end of another adjacent support fixing tube and extends into the support fixing tube, and the other end of the support wire is fixedly connected with a second force application block; both side edges of the sludge shielding surface are correspondingly connected to two adjacent opening and closing surfaces respectively.

8. The urban sewage treatment system based on foam extinguishing and control technology according to claim 7, characterized in that, The sludge collection and opening / closing power member includes a fourth motor, a first bevel gear, a power relay rod, a second bevel gear, a second worm, a transmission rotating shaft, a second worm gear, a first transmission rod and a second transmission rod. The fourth motor is arranged in the sludge circulation protection shell. The first bevel gear is arranged on the rotating shaft of the fourth motor. The second bevel gear is arranged at one end of the power relay rod, and the second bevel gear meshes with the first bevel gear; the second worm is connected to the other end of the power relay rod. The transmission rotating shaft is arranged on the sludge circulation protection shell through a rotating shaft support seat. The second worm gear is sleeved on the transmission rotating shaft, and the second worm gear meshes with the second worm; one end of the first transmission rod is arranged on the transmission rotating shaft. A plurality of the first transmission rods correspond to a plurality of opening and closing doors one by one; the lengths of the plurality of first transmission rods are all different, such that the closer the first transmission rod is to the axis of the sludge circulation protection shell, the smaller its length; One end of the second transmission rod is hinged to the other end of the first transmission rod, and a dovetail block is arranged at the other end of the second transmission rod. The dovetail block is matched with the dovetail groove on the opening and closing door.

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