Up-flow two-stage anaerobic membrane bioreactor domestic sewage treatment device

Abstract

The utility model discloses an up-flow two-stage anaerobic membrane bioreactor domestic sewage treatment device which comprises a reactor, a first fixing frame and a second fixing frame are sequentially mounted in the reactor, and a first-stage three-phase separator is arranged above the first fixing frame; a plurality of fixing plates are uniformly distributed on the inner side wall of the reactor in the circumferential direction at intervals, the fixing plates are located between the first-stage three-phase separator and the second fixing frame, and a precipitation bin is installed in the middle of each fixing plate; a biogas pipe is arranged at the top of the reactor. According to the utility model, sewage is pushed to flow upwards by the water distributor, the rising sewage is reacted in the primary anaerobic membrane area and then impacts the splitter plate, and the splitter plate shakes along the elastic rod under the action of water pressure and disturbs the sewage, so that the reaction between the sewage and anaerobic sludge is more sufficient, and the splitter plate also blocks the sewage, so that the sewage is prevented from entering the primary anaerobic membrane area. The contact time of sewage and anaerobic sludge is prolonged; and the reacted sewage enters the second-stage anaerobic membrane area to be treated again, so that the sewage treatment effect is improved.

Description

Technical Field

[0001] The utility model relates to the field of sewage treatment, in particular to an upflow type double-stage anaerobic membrane bioreactor domestic sewage treatment device. Background Art

[0002] The upflow two-stage anaerobic membrane bioreactor is a new sewage treatment technology that combines a membrane separation unit with a biological treatment unit. The main working principle is to retain a large amount of anaerobic sludge in the bottom reaction zone of the reactor. The sludge with good sedimentation and coagulation properties forms a sludge layer at the bottom. The sewage to be treated flows into the bottom of the anaerobic sludge bed and mixes with the sludge in the sludge layer. An anaerobic membrane is formed on the surface of the sludge, and the microorganisms in the anaerobic membrane decompose the organic matter in the sewage and convert it into biogas. The biogas is continuously released in the form of tiny bubbles. The tiny bubbles merge continuously during the rising process and gradually form larger bubbles. The bubbles form a sludge with a relatively thin concentration on the upper part of the sludge bed due to the stirring of the biogas. The sludge and water rise together and enter the three-phase separator. When the biogas hits the reflector at the bottom of the separator, it bends to the four sides of the reflector, then passes through the water layer and enters the gas chamber. The biogas is concentrated in the gas chamber and is discharged with a conduit. The solid-liquid mixture enters the sedimentation area of ​​the three-phase separator after reflection. The sludge in the sewage flocculates, the particles gradually increase in size, and settle under the action of gravity. The sludge settled on the inclined wall slides back to the anaerobic reaction area along the inclined wall, causing a large amount of sludge to accumulate in the reaction area. The treated water after separation from the sludge overflows from the upper part of the overflow weir in the sedimentation area and is then discharged from the sludge bed.

[0003] During use of the existing upflow two-stage anaerobic membrane bioreactor domestic sewage treatment device, since the sewage enters the reactor in an upward manner, as the water continues to flow in, the contact time between the sewage entering the reactor later and the anaerobic sludge is shorter, which in turn shortens the reaction time between the sewage and the anaerobic sludge, resulting in insufficient reaction between the sewage and the anaerobic sludge, resulting in less biogas production, and the discharged treated sewage is not completely treated, resulting in poor sewage treatment effect. Secondly, the biogas contained in the sewage can only rise in the form of bubbles, and the bubbles are affected by the water pressure of the sewage, affecting the biogas discharge efficiency. Utility Model Content

[0004] The utility model aims to provide an upflow type double-stage anaerobic membrane bioreactor domestic sewage treatment device to solve the technical problem in the prior art that sewage and anaerobic sludge cannot fully react with each other.

[0005] In order to achieve the above-mentioned utility model purpose, the technical solution of the utility model is:

[0006] An upflow two-stage anaerobic membrane bioreactor domestic sewage treatment device includes a reactor, wherein a first fixing frame and a second fixing frame are installed in sequence from bottom to top in the reactor, a first-stage three-phase separator is arranged above the first fixing frame, and a second-stage three-phase separator is arranged above the second fixing frame; a plurality of fixing plates are evenly distributed along the circumference of the inner side wall of the reactor, and the fixing plates are located between the first-stage three-phase separator and the second fixing frame, and a sedimentation bin is fixedly installed in the middle of the fixing plates; a biogas pipe is arranged on the top of the reactor.

[0007] Preferably, an elastic rod is fixedly connected to the middle of the bottom surface of the first fixing frame, and an end of the elastic rod away from the first fixing frame is fixedly connected to a diverter plate, and a plurality of spiral holes are formed on the diverter plate.

[0008] Preferably, an arc-shaped plate is provided between adjacent fixed plates, with both ends of the arc-shaped plate connected to the adjacent fixed plates. A gap is formed between the arc-shaped plate and the outer wall of the sedimentation bin, and the arc-shaped plate is provided with a plurality of diversion holes. The arc-shaped plate blocks the sewage, preventing the pressure of the sewage from affecting the sedimentation of the sludge, thereby improving the sedimentation effect of the sludge.

[0009] Preferably, the sedimentation bin is outer-mounted with an annular plate positioned above the curved plate. The annular plate is provided with a plurality of through-holes. Tension springs corresponding to the fixed plates are fixed to the lower surface of the annular plate, with the ends of the tension springs facing away from the annular plate being fixedly connected to the corresponding fixed plates. Magnetic blocks are symmetrically arranged on the upper surface of the annular plate, and magnetic strips that attract the magnetic blocks are vertically fixedly connected to the lower surface of the fixing frame. Biogas contained in the sewage is rapidly discharged through the through-holes when the annular plate is shaken, thereby improving biogas discharge efficiency.

[0010] Preferably, a primary anaerobic membrane area is provided below the diverter plate, a plurality of composite fillers are provided in the primary anaerobic membrane, and the composite fillers are suspended on the diverter plate.

[0011] Preferably, a secondary anaerobic membrane area is provided in the sedimentation bin, and a plurality of suspended ball fillers are provided in the secondary anaerobic membrane area.

[0012] Preferably, a water inlet pipe is fixedly connected to the middle of the bottom of the reactor, and a water distributor connected to the water inlet pipe is installed at the bottom of the reactor.

[0013] Preferably, a water collecting tank is provided above the secondary three-phase separator, a drain pipe passing through the reactor is provided at the bottom of the water collecting tank, a reflux pipe is provided outside the reactor, one end of the reflux pipe is connected to the water inlet pipe, and the other end is connected to the reactor, and is located between the secondary three-phase separator and the water collecting tank.

[0014] The beneficial effects of the utility model are:

[0015] 1. In the present invention, elastic rods, diverter plates and spiral holes are provided. When sewage enters the reactor through the water inlet pipe, the water distributor pushes the sewage upward, causing the sewage flow to impact the diverter plate. The diverter plate shakes along the elastic rod under the action of water pressure. At the same time, part of the sewage will be discharged through the spiral hole. The effect of the spiral hole will increase the shaking amplitude of the diverter plate, thereby disturbing and stirring the sewage, making the reaction between the sewage and the anaerobic sludge more complete. In addition, after the sewage is blocked by the diverter plate, the contact time between the sewage and the anaerobic sludge is prolonged, thereby improving the sewage treatment effect.

[0016] 2. By setting up curved plates, diversion holes, etc., when the water flows through the first-stage three-phase separator and continues to rise, the water flow will be blocked by the curved plates. The blocked water flow will rise through the diversion holes and the edge gaps of the curved plates. The design of the curved plates and diversion holes will weaken the impact force of the water flow, thereby preventing the sludge particles settled in the sedimentation bin from being affected by the water flow and improving the sludge sedimentation effect.

[0017] 3. By setting a tension spring, annular plate, through hole, magnetic block and magnetic strip, when the water flow continues to rise after passing through the diversion hole, the water flow will impact the annular plate, causing the annular plate to overcome the potential energy of the tension spring and move upward. When the magnetic block enters the magnetic field range of the magnetic strip, the magnetic strip exerts a magnetic repulsive force on the magnetic block, causing the annular plate to move downward due to the magnetic repulsive force and the potential energy of the tension spring. At this time, the continuous movement of the annular plate causes the through holes on the annular plate to stir the sewage, causing the biogas contained in the sewage to be quickly discharged from the sewage, thereby improving the biogas discharge efficiency.

[0018] 4. By setting up the first-level anaerobic membrane area and the second-level anaerobic membrane area, it is easier for microorganisms in the sewage to form biofilms, further improving the treatment efficiency of the microbial membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the present utility model.

[0020] Figure 2 Schematic diagram of the internal structure of the reactor.

[0021] Figure 3 It is a structural schematic diagram of the first fixing frame.

[0022] Figure 4 It is a structural diagram of the secondary three-phase separator and the sedimentation tank.

[0023] In the picture:

[0024] 1. Support frame; 11. Water collection tank; 12. Drain pipe; 13. Biogas pipe; 14. Return pipe; 2. Reactor; 3. Water inlet pipe; 4. Water distributor; 5. First fixed frame; 51. Elastic rod; 52. Diverter plate; 53. Spiral hole; 54. Combined filler; 6. Primary three-phase separator; 7. Second fixed frame; 71. Magnetic strip; 8. Secondary three-phase separator; 9. Fixed plate; 91. Arc plate; 92. Diversion hole; 93. Tension spring; 94. Annular plate; 95. Through hole; 96. Magnetic block; 10. Sedimentation bin; 101. Suspended ball filler. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings.

[0026] The embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Example 1

[0028] like Figure 1 and Figure 2 As shown, an upflow two-stage anaerobic membrane bioreactor domestic sewage treatment device includes a support frame 1, a reactor 2 is fixedly mounted on the support frame 1, and a biogas pipe 13 is provided on the top of the reactor 2; a water inlet pipe 3 is fixedly mounted on the bottom of the reactor 2, and a water distributor 4 connected to the water inlet pipe 3 is provided in the reactor 2, and the water distributor 4 is located in the middle of the bottom of the reactor.

[0029] like Figure 2 、 Figure 3 As shown, the reactor 2 is fixed with a first fixing frame 5, a primary three-phase separator 6, a second fixing frame 7, a secondary three-phase separator 8 and a water collecting tank 11 from bottom to top. Among them, a drain pipe 12 is fixedly connected to the middle of the bottom surface of the water collecting tank 11; a return pipe 14 passing through the reactor is fixedly arranged between the secondary three-phase separator 8 and the water collecting tank 11, and the end of the return pipe 14 away from the water collecting tank 11 is connected to the water inlet pipe 3. An elastic rod 51 is vertically fixedly connected to the middle of the bottom surface of the first fixing frame 5, and the end of the elastic rod 51 away from the first fixing frame 5 is fixedly connected to a diverter plate 52, and a plurality of spiral holes 53 are provided on the diverter plate 52. A primary anaerobic membrane area is arranged below the diverter plate 52, and a plurality of composite fillers 54 suspended on the diverter plate 52 are arranged in the primary anaerobic membrane.

[0030] like Figure 2 and Figure 4As shown, a number of fixed plates 9 are evenly spaced along the circumference of the inner wall of the reactor 1. The fixed plates 9 are located between the primary three-phase separator 6 and the second fixed frame 7. A settling bin 10 is fixedly mounted in the middle of the fixed plates 9. The settling bin 10 contains a secondary anaerobic membrane zone, which contains a number of suspended ball fillers 101. An arcuate plate 91 is disposed between adjacent fixed plates 9. The ends of the arcuate plates 91 are welded to the adjacent fixed plates 9. The arcuate plates 91 are provided with flow guide holes 92, and a gap exists between the arcuate plates 91 and the outer wall of the settling bin 10.

[0031] like Figure 4 As shown, the outer cover of the sedimentation bin 10 is provided with an annular plate 94 located above the arc-shaped plate 91, and a plurality of through holes 95 are opened on the annular plate 94. A tension spring 93 is provided between each fixed plate 9 and the annular plate 94, and the two ends of the tension spring 93 are welded to the annular plate 94 and the fixed plate 9 respectively. A magnetic block 96 is fixedly provided on the top surface of the annular plate 94. A magnetic strip 71 is fixedly provided on the bottom surface of the fixing frame 2 7 just above the magnetic block 96. The magnetic properties of the magnetic strip 71 are the same as those of the magnetic block 96, so that the magnetic block 96 on the annular plate 94 will be moved by the magnetic repulsion of the magnetic strip 71, causing the annular plate 94 and the through holes 95 to shake.

[0032] In summary,

[0033] When the sewage treatment device is operating normally, the untreated sewage is introduced into the interior of the reactor 2 through the water inlet pipe 3, and then the sewage will first contact the anaerobic sludge inside the reactor 2, thereby causing an anaerobic reaction and producing biogas. The treated sewage will enter the sump 11 and finally be discharged through the drain pipe 12, while the biogas will continue to rise inside the sewage in the form of bubbles and gradually form larger bubbles, and finally discharge the sewage. The biogas discharged from the sewage will eventually be discharged through the biogas pipe 13, and the sludge produced by the anaerobic reaction will be separated by the first three-phase separation. The sludge separated by the secondary three-phase separator 8 will be precipitated in the sedimentation bin 10 and finally precipitated in the anaerobic sludge under the action of gravity. In this process, as the water flow rises, the water flow impacts the diverter plate 52, causing the diverter plate 52 to shake along the elastic rod 51 under the action of water pressure, and part of the water flow will be discharged through the spiral hole 53. At this time, the effect of the spiral hole 53 will increase the shaking amplitude of the diverter plate 52, causing the sewage to be blocked by the diverter plate 52 and the sewage to be separated. After the flow plate 52 is blocked, it will fully contact with the anaerobic sludge, so that the sewage and the anaerobic sludge can fully react, thereby improving the reaction effect. At the same time, when the water flows through the first-stage three-phase separator 6 and continues to rise, the water flow will be blocked by the curved plate 91. The blocked water flow will rise through the guide hole 92 and the edge gap of the curved plate 91. The design of the curved plate 91 and the guide hole 92 weakens the impact of the water flow, thereby preventing the sludge particles deposited in the sedimentation bin 10 from being affected by the water flow, thereby improving the sludge sedimentation effect. Secondly, when the water flows When the water continues to rise after passing through the diversion hole 92, the water flow will impact the annular plate 94, causing the annular plate 94 to overcome the potential energy of the tension spring 93 and move upward. When the magnetic block 96 enters the magnetic field range of the magnetic strip 71, the magnetic strip 71 exerts a magnetic repulsive force on the magnetic block 96, causing the annular plate 94 to move downward due to the magnetic repulsive force and the potential energy of the tension spring 93. At this time, the continuous movement of the annular plate 94 causes the through hole 95 on the annular plate 94 to stir the sewage, causing the biogas contained in the sewage to be quickly discharged from the sewage, thereby improving the discharge efficiency of the biogas.

[0034] The embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. An upflow double-stage anaerobic membrane bioreactor domestic sewage treatment device, comprising a reactor, characterized in that: The reactor is provided with a first fixing frame and a second fixing frame sequentially installed from bottom to top, a primary three-phase separator is provided above the first fixing frame, and a secondary three-phase separator is provided above the second fixing frame; a plurality of fixing plates are evenly spaced along the circumference of the inner side wall of the reactor, and the fixing plates are located between the primary three-phase separator and the second fixing frame, and a sedimentation bin is fixedly installed in the middle of the fixing plates; A biogas pipe is provided on the top of the reactor.

2. The upflow double-stage anaerobic membrane bioreactor domestic sewage treatment device according to claim 1, characterized in that: An elastic rod is fixedly connected to the middle of the bottom surface of the first fixing frame, and an end of the elastic rod away from the first fixing frame is fixedly connected to a diverter plate, and a plurality of spiral holes are formed on the diverter plate.

3. The upflow double-stage anaerobic membrane bioreactor domestic sewage treatment device according to claim 2, characterized in that: An arc plate is provided between adjacent fixed plates, both ends of the arc plate are respectively connected to adjacent fixed plates, a gap exists between the arc plate and the outer wall of the sedimentation bin, and a plurality of guide holes are opened on the arc plate.

4. The upflow double-stage anaerobic membrane bioreactor domestic sewage treatment device according to claim 3, characterized in that: The sedimentation bin is covered with an annular plate, and the annular plate is located above the arc-shaped plate. A plurality of through holes are opened on the annular plate. A tension spring corresponding to the fixed plate is fixed on the lower bottom surface of the annular plate, and one end of the tension spring away from the annular plate is fixedly connected to the corresponding fixed plate. Magnetic blocks are symmetrically arranged on the upper surface of the annular plate, and a magnetic strip that is magnetically attracted to the magnetic blocks is vertically fixedly connected to the lower bottom surface of the fixing frame.

5. The upflow double-stage anaerobic membrane bioreactor domestic sewage treatment device according to claim 4, characterized in that: A primary anaerobic membrane area is provided below the diverter plate, a plurality of composite fillers are provided in the primary anaerobic membrane, and the composite fillers are suspended on the diverter plate.

6. The upflow double-stage anaerobic membrane bioreactor domestic sewage treatment device according to claim 2, characterized in that: A secondary anaerobic membrane area is provided in the sedimentation bin, and a plurality of suspended ball fillers are provided in the secondary anaerobic membrane area.

7. The upflow double-stage anaerobic membrane bioreactor domestic sewage treatment device according to claim 1, characterized in that: A water inlet pipe is fixedly connected to the middle of the bottom of the reactor, and a water distributor connected to the water inlet pipe is installed at the bottom of the reactor.

8. The upflow double-stage anaerobic membrane bioreactor domestic sewage treatment device according to claim 7, characterized in that: A water collection tank is provided above the secondary three-phase separator, and a drainage pipe passing through the reactor is provided at the bottom of the water collection tank. A reflux pipe is provided outside the reactor, and one end of the reflux pipe is connected to the water inlet pipe, and the other end is connected to the reactor, and is located between the secondary three-phase separator and the water collection tank.

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