Internal circulation biological fluidized bed domestic sewage treatment device
By setting up multi-layer internal circulation areas and diversion structures in the internal circulation biological fluidized bed, the sewage flow route is extended and the contact with the biological fluidized bed is enhanced, which solves the problem of poor sewage treatment effect and achieves more thorough sewage degradation and filler anti-clogging.
Patent Information
- Application Number
- CN202422481483.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-14
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-10-14
AI Technical Summary
In existing internal circulation biological fluidized bed sewage treatment devices, the sewage movement route is short and the contact time is short, resulting in poor treatment effect.
Lower and upper internal circulation areas are set up in the reactor. Combined with the design of guide plates, guide plates and biological fluidized bed fillers, the sewage flow route is extended and the contact time with the biological fluidized bed is increased. The sewage flow rate is controlled by guide plates and baffles, and the staggered structure of the biological fluidized bed fillers is used to improve the contact efficiency.
The contact time between sewage and biological fluidized bed is prolonged, the sewage treatment effect is improved, the degradation is more thorough, and the risk of filler clogging is reduced.
Smart Images
Figure CN223329111U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of sewage treatment, in particular to an internal circulation biological fluidized bed domestic sewage treatment device. Background Art
[0002] The biological fluidized bed is filled with smaller inert particles such as sand, activated carbon, and coke as carriers. The surface of the carrier is covered with a biofilm. The sewage flows from bottom to top at a certain flow rate, keeping the carrier particles in a fluidized state.
[0003] When the existing internal circulation biological fluidized bed is used for sewage treatment, the sewage enters the fluidized bed from the bottom and continues to move vertically upward for a certain distance by inertia before moving downward under the action of gravity. Its movement path is short, the hydraulic retention time is short, and the contact time with the fluidized bed is also short. Therefore, the sewage treatment effect is poor. Utility Model Content
[0004] The purpose of the utility model is to provide an internal circulation biological fluidized bed domestic sewage treatment device to solve the technical problems in the prior art of short sewage movement route, short contact time with the fluidized bed and poor sewage treatment effect.
[0005] In order to achieve the above-mentioned utility model purpose, the technical solution of the utility model is:
[0006] A domestic sewage treatment device using an internal circulation biological fluidized bed comprises a reactor, wherein a biological fluidized bed zone is arranged in the reactor, and a water distributor is arranged at the bottom of the reactor. A lower internal circulation zone and an upper internal circulation zone are sequentially arranged in the biological fluidized bed zone from bottom to top, wherein the lower internal circulation zone comprises a vertically arranged central tube, and the water distributor is located directly below the central tube; the upper internal circulation zone comprises a guide tube vertically arranged above the central tube, and a downwardly inclined guide plate is arranged outside the guide tube, wherein one end of the guide plate is fixedly connected to the inner side wall of the reactor and the other end is suspended, and an upwardly protruding baffle is provided at the lower end of the guide tube, and a plurality of small holes are provided on the baffle. When the sewage in the lower internal circulation zone is working, part of the sewage circulates from the inside out in the lower part, while part of the sewage flows to the upper internal circulation zone, where it circulates from the inside out. The two internal circulations stagger the sewage flows, thus extending the flow path and ensuring long-term and sufficient contact with the fluidized bed in the biological fluidized bed area, resulting in more complete degradation of organic matter in the sewage. The inclined guide plate facilitates the rapid guidance of sewage flowing out of the guide tube into the biological fluidized bed area. The baffle is used to buffer the speed at which sewage flows into the guide tube, ensuring a longer contact time between sewage and the fluidized bed; the small holes can evenly divert the sewage, further slowing the speed of sewage's upward flow.
[0007] Preferably, a plurality of guide plates are disposed axially along the inner sidewall of the central tube, each of which has its upper end positioned in the center of the central tube. The spiral arrangement of the guide plates not only directs sewage flowing along the inner wall of the central tube toward the center of the tube, thereby changing the flow direction of the sewage, but also disturbs the sewage within the central tube to a certain extent, thereby enhancing the flow of the filler within the central tube, reducing dead zones, and improving sewage treatment efficiency.
[0008] Preferably, the upper opening of the guide tube has an arc-shaped flange extending outwardly, and the flange faces the guide plate. The flange can guide the sewage flowing out of the upper end of the guide tube to the guide plate, and the sewage flows without dead angles.
[0009] Preferably, the guide tube is in an inverted cone shape, which reduces water inflow into the lower end of the guide tube, allowing sewage to fill the guide tube for a longer time, thereby extending the movement path of the sewage and further increasing the contact time between the sewage and the fluidized bed in the biological fluidized bed area.
[0010] Preferably, a plurality of biological fluidized bed fillers are provided in the biological fluidized bed area, and the biological fluidized bed fillers include an inner ring, an outer ring, an upper connecting petal, and a lower connecting petal; wherein the inner ring and the outer ring are arranged concentrically, and the outer ring is located outside the inner ring; the upper connecting petals are evenly spaced along the outer circumference of the inner ring, and are used to connect the inner and outer rings; the lower connecting petals are located below the upper connecting petals and are arranged in an upper and lower staggered manner; the upper and lower connecting petals are each provided with a plurality of through holes. The staggered arrangement of the upper and lower connecting petals can change the flow direction of the sewage, and the staggered flow of the sewage can not only reduce the clogging of the biological fluidized bed filler, but also ensure sufficient contact with the biological fluidized bed filler.
[0011] Preferably, bio-rope fillers are provided between adjacent upper connecting petals and lower connecting petals, which further treat the sewage, make biofilm formation more convenient and reliable, and are not easily carried away by flowing sewage.
[0012] Preferably, the outer circumference of the outer ring is provided with a plurality of arc-shaped protrusions. When the biological fluidized filler flows, it is easy to collide with each other, causing damage to the outer ring and shortening its service life; the arc-shaped protrusions can reduce contact between the outer rings and protect the outer ring.
[0013] The beneficial effects of the utility model are:
[0014] 1. When the sewage in the lower internal circulation area of the utility model is working, part of the sewage is circulated from the inside to the outside in the lower part, and part of the sewage flows to the upper internal circulation area and is circulated from the inside to the outside in the upper internal circulation area. The two internal circulations extend the flow route of the sewage, and the sewage is in full contact with the biological fluidized bed area for a long time, so that the organic matter in the sewage is degraded more thoroughly.
[0015] 2. The biological fluidized bed area is provided with upper and lower connecting petals that are staggered up and down, which can change the flow direction of sewage and make the sewage flow staggered. This can not only reduce the blockage of the biological fluidized packing, but also fully contact the biological fluidized packing, thereby improving the sewage treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural diagram of the present utility model.
[0017] Figure 2 Schematic diagram of the structure of biological fluidized bed filler.
[0018] Figure 3 Schematic diagram of the baffle structure.
[0019] In the picture:
[0020] 1. Reactor; 11. Water inlet pipe; 12. Water outlet pipe; 2. Water distributor; 3. Lower internal circulation area; 31. Center tube; 4. Upper internal circulation area; 41. Guide tube; 42. Baffle; 43. Small hole; 44. Flanged edge; 5. Guide plate; 6. Guide plate; 7. Biofluidized bed area; 8. Biofluidized filler; 81. Inner ring; 82. Outer ring; 83. Upper connecting flap; 84. Lower connecting flap; 85. Through hole; 9. Bio-rope filler; 10. Arc-shaped protrusion. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings.
[0022] 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. Example 1
[0023] like Figure 1 and Figure 2As shown, an internal circulation biological fluidized bed domestic sewage treatment device includes a reactor 1, a water distributor 2 disposed at the bottom of the reactor 1, an inlet pipe 11 connected to the water distributor 2 disposed outside the reactor 1, and an outlet pipe 12 disposed above the inlet pipe 11. A biological fluidized bed area 7 is disposed within the reactor 1, within which are disposed a plurality of biological fluidized packing materials 8. The biological fluidized packing materials 8 comprise a concentrically arranged inner ring 81 and outer ring 82, and upper and lower connecting petals 83 and 84 connecting the inner and outer rings 81 and 82. The outer ring 82 is provided with a plurality of arc-shaped protrusions 10 on its outer circumference. Several upper connecting petals 83 are evenly spaced along the outer circumference of the inner ring 81. The lower connecting petals 84 are located below the upper connecting petals 83 and are arranged in an alternating pattern with the upper connecting petals 83. Each upper and lower connecting petal 84 has a plurality of through-holes 85. Biological rope packing materials 9 are disposed between adjacent upper and lower connecting petals 83 and 84.
[0024] like Figure 1 and Figure 3 As shown, a lower internal circulation zone 3 and an upper internal circulation zone 4 are sequentially arranged above the water distributor 2 from bottom to top. The lower internal circulation zone 3 includes a central tube 31 vertically arranged directly above the water distributor 2. A number of spiral upward guide plates 6 are arranged on the inner side wall of the central tube 31 along its length direction, and the upper end of each guide plate 6 is located in the middle of the central tube 31. The upper inner circulation zone 4 includes a guide tube 41 vertically arranged directly above the central tube 31. The guide tube 41 is in the shape of an inverted cone. The upper end opening of the guide tube 41 has an arc-shaped flange 44 extending outward, and the lower end opening is provided with an upwardly protruding baffle 42, and a number of small holes 43 are provided on the baffle 42; a guide plate 5 is provided on the outside of the guide tube 41 at a downward angle, and one end of the guide plate 5 is fixedly connected to the inner wall of the reactor 1, and the other end is suspended; preferably, the guide plate 5 is arranged parallel to the outer circumference of the guide tube 41, and the angle between the guide plate 5 and the inner wall of the reactor 1 is too large, the channel between the guide plate 5 and the guide tube 41 is smaller, the sewage flow rate is too slow, and the sewage treatment efficiency is affected; the angle between the guide plate 5 and the inner wall of the reactor 1 is too small, and the guide plate 5 does not have a guiding function.
[0025] In summary,
[0026] When the internal circulation biological fluidized bed domestic sewage treatment device is working, the sewage enters from the water inlet pipe 11 and enters the central tube 31 evenly under the action of the water distributor 2. Part of the sewage moves vertically upward from the middle of the central tube 31, and part of the sewage sticks to the inner wall of the central tube 31 and is spirally introduced into the middle of the central tube 31 along the guide plate 6; part of the sewage flowing out of the upper end of the central tube 31 circulates downward and mixes with the incoming sewage again; part of the sewage enters the guide tube 41 through the baffle 42 and flows out from the upper end of the guide tube 41, moving downward along the flange 44 and the guide plate 5, and staggered with the sewage moving downward in the central tube 31, extending the sewage flow route, and can fully contact with the fluidized bed in the biological fluidized bed area 7 for a long time, so that the organic matter in the sewage is degraded more thoroughly.
[0027] 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 internal circulation biological fluidized bed domestic sewage treatment device, comprising a reactor, a biological fluidized bed area is provided in the reactor, and a water distributor is provided at the bottom of the reactor, characterized in that: The biological fluidized bed area is provided with a lower internal circulation area and an upper internal circulation area from bottom to top. The lower internal circulation area includes a vertically arranged central tube, and the water distributor is located directly below the central tube. The upper internal circulation zone includes a guide tube arranged vertically above the central tube, and a downward-inclined guide plate is provided on the outside of the guide tube. One end of the guide plate is fixedly connected to the inner wall of the reactor, and the other end is suspended. An upward-protruding baffle is provided at the lower end of the guide tube, and a plurality of small holes are opened on the baffle.
2. The internal circulation biological fluidized bed domestic sewage treatment device according to claim 1, characterized in that: A plurality of spirally upward guide plates are arranged on the inner side wall of the central tube along its axial direction, and the upper end of each guide plate is located in the middle of the central tube.
3. The internal circulation biological fluidized bed domestic sewage treatment device according to claim 2, characterized in that: An arc-shaped flange extends outward from the opening at the upper end of the guide tube, and the flange faces the guide plate.
4. The internal circulation biological fluidized bed domestic sewage treatment device according to claim 3, characterized in that: The guide tube is in the shape of an inverted cone.
5. The internal circulation biological fluidized bed domestic sewage treatment device according to claim 1, characterized in that: A number of biofluidized fillers are arranged in the biofluidized bed area, and the biofluidized fillers include an inner ring, an outer ring, an upper connecting petal and a lower connecting petal; The inner ring and the outer ring are arranged concentrically, and the outer ring is located outside the inner ring; The upper connecting petals are evenly spaced along the outer circumference of the inner ring and are used to connect the inner and outer rings; the lower connecting petals are located below the upper connecting petals and are arranged in an alternating manner with the upper connecting petals; A plurality of through holes are formed on the upper and lower connecting petals.
6. The internal circulation biological fluidized bed domestic sewage treatment device according to claim 5, characterized in that: Biological rope fillers are arranged between adjacent upper connecting petals and lower connecting petals.
7. The internal circulation biological fluidized bed domestic sewage treatment device according to claim 6, characterized in that: A plurality of arc-shaped protrusions are arranged on the outer circumference of the outer ring.