Material cage stacking type MBBR (Moving Bed Biofilm Reactor) biological tank

Abstract

The invention discloses a material cage stacked MBBR (moving bed biofilm reactor) biological tank which comprises a tank body, a material frame and material cages, the material frame is fixed in the tank body, and a vertical guide groove is formed in the material frame; a plurality of material cages are vertically stacked in the pool body, guide parts matched with the guide grooves are arranged on the material cages, the guide parts are located in the guide grooves, and the material cages can vertically slide along the material frame. The material cage is filled with MBBR fillers, and the MBBR fillers are selected or combined according to different water qualities so as to play the advantages of different fillers. The beneficial effects of the invention are that the plurality of MBBR material cages are arranged in the biological tank in a stackable manner, and the MBBR material cages can be rapidly hoisted and lowered, so that the replacement difficulty of the MBBR filler is reduced, the replacement time of the MBBR filler is shortened, the oxygenation performance of the filler can be improved, and the ammonia nitrogen concentration of effluent can be reduced. The treatment effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of environmental protection, and in particular to a domestic sewage treatment device. Background Art

[0002] MBBR technology is widely used in enhanced sewage treatment. The basic principle of MBBR is to add a certain amount of suspended filler with a density close to that of water into the aeration tank as a microbial growth carrier to increase the types and quantity of microorganisms in the reactor; traditional MBBR fillers are laid in cages, and the cages are fixed in the biological pool.

[0003] With the continuous enrichment of MBBR filler types in recent years, different types of MBBR fillers are preferred for different water qualities and conditions. Fixing the MBBR cage in the biological pond will undoubtedly increase the difficulty of replacing the filler, prolong the replacement time of the filler, and thus affect the production rhythm. Summary of the invention

[0004] In view of this, the present invention provides a solution that can facilitate the rapid replacement of MBBR fillers. The main technical solutions adopted are as follows:

[0005] A cage stacking MBBR biological pool, the key of which is: comprising a pool body, a material rack, and a cage, wherein the material rack is fixed in the pool body, and a vertical guide groove is provided on the material rack;

[0006] A plurality of the material cages are stacked vertically in the pool body, and a guide portion matching the guide groove is provided on the material cage. The guide portion is located in the guide groove, and the material cage can slide vertically along the material rack.

[0007] The cage is filled with MBBR filler, which is selected or combined according to different water qualities to give full play to the advantages of different fillers. The cage can be in various forms such as rectangular blocks, round cakes, cylinders, sheets, etc. The guide part and the guide groove cooperate with each other to provide stable guiding effect on the cage. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural schematic diagram of the present invention;

[0009] Figure 2 It is a schematic diagram of the appearance structure of the cage 3;

[0010] Figure 3 is a schematic structural diagram of an anchor 6;

[0011] Figure 4 Schematic diagram of the connection between the guide channel steel 21 and the inner wall of the tank body 1;

[0012] Figure 5 It is a schematic diagram of the internal structure of the cage 3;

[0013] Figure 6 is a horizontal cross-sectional view of the vertical guide tube 7;

[0014] Figure 7 It is a vertical cross-sectional view of the vertical guide tube 7;

[0015] Figure 8 The dissolved oxygen-time curves of the conventional filler solution and the solution of the present invention are shown;

[0016] Fig. 9 The ammonia nitrogen concentration-time curves of the conventional filler scheme and the scheme of the present invention are shown. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with embodiments and drawings.

[0018] like Figure 1 , 2 As shown in , 3 and 4, a cage stacking MBBR biological pond comprises a pond body 1, a material rack 2 and a cage 3. The material rack 2 is fixed in the pond body 1, and a vertical guide groove 2a is provided on the material rack 2;

[0019] A plurality of the material cages 3 are stacked vertically in the pool body 1 , and a guide portion 4 matching the guide groove 2 a is provided on the material cage 3 . The guide portion 4 is located in the guide groove 2 a , and the material cage 3 can slide vertically along the material rack 2 .

[0020] There is at least one material rack 2 and at least two material cages 3 . At least two material cages 3 are stacked on each material rack 2 . The material cages 3 are filled with MBBR fillers.

[0021] The material rack 2 includes two guide channel steels 21 arranged opposite to each other. The guide channel steels 21 are arranged vertically. The two guide channel steels 21 are respectively close to two opposite inner walls of the tank body 1. The notches of the two guide channel steels 21 are arranged opposite to each other.

[0022] A bottom plate 22 is fixed to the lower end of the guide channel steel 21, and the bottom plate 22 is fixed to the bottom surface of the tank body 1 by at least two expansion bolts. The inner cavity of the guide channel steel 21 forms the guide groove 2a, and the upper part of the guide channel steel 21 is fixed to the inner wall of the tank body 1 by an anchor 6;

[0023] A specific implementation of the anchor 6 is:

[0024] The anchor 6 includes a channel steel stabilizing rod 61 and two channel steel stabilizing seats 62;

[0025] The channel steel stabilizing rod 61 is arranged horizontally, and the two ends of the channel steel stabilizing rod 61 are respectively fixedly connected (welded) to the two guide channel steels 21, and the two ends of the channel steel stabilizing rod 61 are respectively fixedly connected to the inner wall of the tank body 1 through a fixing seat 63; the fixing seat 63 is fixedly connected to the inner wall of the tank body 1 through an expansion bolt;

[0026] The two channel steel stabilizing seats 62 correspond to the two guide channel steels 21, and the channel steel stabilizing seats 62 are fixed to the inner wall of the pool body 1 by expansion bolts. The channel steel stabilizing seats 62 and the guide channel steels 21 are located on the same inner wall of the pool body 1, and the channel steel stabilizing seats 62 are fixedly connected (welded) to the corresponding guide channel steels 21, and the guide channel steels 21 are located between the channel steel stabilizing rods 61 and the corresponding channel steel stabilizing seats 62.

[0027] The channel steel stabilizing seat 62 and the fixing seat 63 may be fixed to the same inner wall of the tank body 1 , or may be fixed to different inner walls of the tank body 1 .

[0028] The cage 3 includes a cubic cage frame 31, which can be welded by angle steel. The cage frame 31 is covered with a mesh 32, and the edge of the mesh 32 is welded and fixed to the cage frame 31. The bottom of the cage 3 is provided with a heightening foot 5, which is vertically arranged, located below the cage frame 31, and arranged close to the edge of the cage 3. The upper end of the heightening foot 5 is fixedly connected to the cage frame 31. The heightening foot 5 is used to suspend the cage 3 for aeration. The heightening foot 5 of the cage 3 at the bottom layer is in contact with the bottom of the tank body 1 or the bottom plate 22, and the heightening foot 5 of the cage 3 at the upper layer is supported on the cage 3 at the lower layer.

[0029] Two lifting ears 33 are provided on the top of the cage frame 31 for lifting or lowering the cage 3 .

[0030] The guide part 4 includes two left-side guide parts and two right-side guide parts, the two left-side guide parts correspond to one guide channel steel 21, the two right-side guide parts correspond to another guide channel steel 21, the two left-side guide parts are connected to a vertical side strip of the cage frame 31, the two left-side guide parts are distributed up and down, the two right-side guide parts are connected to another vertical side strip of the cage frame 31, the two right-side guide parts are distributed up and down, and the left-side guide parts and the right-side guide parts are close to the same side of the cage frame 31.

[0031] The guide portion 4 includes a limit head and a limit connection portion, the limit head is located in the corresponding vertical guide groove 2a, and the limit connection portion fixedly connects the limit head and the cage frame 31.

[0032] An aeration network is also arranged at the bottom of the tank body 1 , and an aeration head is provided on the aeration network. The aeration network and the aeration head are located below the cage 3 .

[0033] Combination Figure 5 , 6 As can be seen from Figure 7: two guide vanes 34 are arranged opposite to each other in the cage 3. The guide vanes 34 are arranged obliquely. The lower edge of the guide vanes 34 is connected to the bottom of the cage 3, and the upper edge of the guide vanes 34 is connected to the side wall of the cage 3. An inverted trapezoidal fluidization zone is formed between the two guide vanes 34. Filling blocks are laid in the trapezoidal fluidization zone, and the total volume of the filling blocks accounts for 70% of the volume of the trapezoidal fluidization zone. The aeration head is located directly below the trapezoidal fluidization zone. The gas enters and rises through the lower part of the trapezoidal fluidization zone, during which it pushes and guides the filling blocks to rise and oxygenate. After the filling blocks rise to the top of the cage 3, they are constrained to disperse around, and then fall and gather along the guide vanes 34, so that the filling blocks are circulated and fluidized in the trapezoidal fluidization zone.

[0034] The volume of the filler blocks in the material cage 3 located at the lower layer is greater than the volume of the filler blocks in the material cage 3 located at the upper layer thereof.

[0035] The mesh sheet 32 ​​is densely covered with mesh holes, and the mesh hole diameter of the mesh sheet 32 ​​of the material cage 3 located at the lower layer is larger than the mesh hole diameter of the mesh sheet 32 ​​of the material cage 3 located at the upper layer.

[0036] A vertical guide tube 7 is provided in the cage 3, and the vertical guide tube 7 is located between the two guide plates 34. The distance between the lower end of the vertical guide tube 7 and the bottom surface of the cage 3 is greater than 10 cm. The lower end of the vertical guide tube 7 is fixedly connected to the bottom surface of the cage 3 through a guide support rod 8, and the distance between the upper end of the vertical guide tube 7 and the top surface of the cage 3 is greater than 5 cm. A plurality of collision bumps 71 are distributed on the inner wall of the vertical guide tube 7. The collision bumps 71 are in the shape of triangular pyramids, and the collision bumps 71 can scrape off the old mud film on the surface of the filler block to facilitate the growth of a new mud film.

[0037] Domestic sewage was injected into the tank body 1 of the present invention, and air was introduced into the aeration head. After a period of operation, the dissolved oxygen and the concentration of ammonia nitrogen in the inlet and outlet water were measured on a daily basis. The results were shown in Table 1. Figure 8 , 9 ;

[0038] The ordinary filler scheme is used for sewage treatment. The only difference between the ordinary filler scheme and the scheme of the present invention is that the guide plate 34, the vertical guide tube 7 and the collision convex block 71 are not arranged in the cage 3 of the ordinary filler scheme. After running for the same time, the dissolved oxygen and the inlet and outlet ammonia nitrogen concentrations are measured on a daily basis. The results are shown in Table 1. Figure 8 , 9.

[0039] from Figure 8 , 9 It can be seen that the use of the scheme of the present invention for domestic sewage treatment can increase the dissolved oxygen in the water and reduce the ammonia nitrogen concentration in the effluent.

[0040] Beneficial effects: With the technical solution of the present invention, multiple MBBR cages can be stacked and arranged in the biological pool, and the MBBR cages can be quickly hoisted and lowered, which reduces the difficulty of replacing MBBR fillers and shortens the time of replacing MBBR fillers; and can improve the oxygenation performance of the fillers and reduce the ammonia nitrogen concentration of the effluent, thereby improving the treatment effect.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention, and such changes all fall within the scope of protection of the present invention.

Claims

1. A cage stacking MBBR bio-pond, characterized by: It comprises a tank body (1), a material rack (2), and a material cage (3); the material rack (2) is fixed inside the tank body (1), and a vertical guide groove (2a) is provided on the material rack (2); A plurality of the material cages (3) are stacked vertically in sequence in the tank body (1); a guide portion (4) matching the guide groove (2a) is provided on the material cage (3); the guide portion (4) is located in the guide groove (2a); and the material cage (3) can slide vertically along the material rack (2).

2. The cage stacking MBBR bio-pond according to claim 1, characterized in that: The bottom of the material cage (3) is provided with a heightening support foot (5), and the heightening support foot (5) is arranged close to the edge of the material cage (3).

3. A cage stacking MBBR bio-pond according to claim 1 or 2, characterized in that: The material rack (2) comprises two guide channel steels (21) arranged opposite to each other, the guide channel steels (21) are arranged vertically, the two guide channel steels (21) are respectively close to two opposite inner walls of the tank body (1), and the notches of the two guide channel steels (21) are arranged opposite to each other; A bottom plate (22) is fixed to the lower end of the guide channel steel (21), the bottom plate (22) is fixed to the bottom surface of the tank body (1) by means of expansion bolts, and the upper part of the guide channel steel (21) is fixed to the inner wall of the tank body (1) by means of anchors (6); The inner cavity of the guide channel steel (21) forms the guide groove (2a).

4. A cage stacking MBBR bio-pond according to claim 3, characterized in that: The anchor (6) comprises a channel steel stabilizing rod (61) and a channel steel stabilizing seat (62); The channel steel stabilizing rod (61) is arranged horizontally, and the two ends of the channel steel stabilizing rod (61) are respectively connected to the two guide channel steels (21), and the two ends of the channel steel stabilizing rod (61) are respectively fixedly connected to the inner wall of the tank body (1) through a fixing seat (63); There are two channel steel stabilizing seats (62), the two channel steel stabilizing seats (62) correspond to the two guide channel steels (21), the channel steel stabilizing seats (62) are fixed to the inner wall of the pool body (1), the channel steel stabilizing seats (62) and the guide channel steels (21) are located on the same inner wall of the pool body (1), the channel steel stabilizing seats (62) are fixedly connected to the corresponding guide channel steels (21), and the guide channel steels (21) are located between the channel steel stabilizing rods (61) and the corresponding channel steel stabilizing seats (62).

5. The cage stacking MBBR bio-pond according to claim 2, characterized in that: The material cage (3) comprises a cubic material cage frame (31), the outside of the material cage frame (31) is covered with a mesh (32), the heightening legs (5) are arranged vertically, the heightening legs (5) are located below the material cage frame (31), the upper ends of the heightening legs (5) are fixedly connected to the material cage frame (31), and the top of the material cage frame (31) is provided with a lifting ear (33).

6. A cage stacked MBBR bio-pond according to claim 1, 2 or 5, characterized in that: Two guide plates (34) are arranged opposite to each other in the cage (3). The guide plates (34) are arranged obliquely, the lower edges of the guide plates (34) are connected to the bottom of the cage (3), the upper edges of the guide plates (34) are connected to the side walls of the cage (3), and an inverted trapezoidal fluidization zone is formed between the two guide plates (34); Filler blocks are laid in the trapezoidal fluidizing zone, and the total volume of the filler blocks accounts for 70% of the volume of the trapezoidal fluidizing zone.

7. The cage stacking MBBR bio-pond according to claim 6, characterized in that: The volume of the filler blocks in the material cage (3) located in the lower layer is greater than the volume of the filler blocks in the material cage (3) located in the upper layer.

8. The cage stacking MBBR bio-pond according to claim 5, characterized in that: The mesh (32) is densely covered with mesh holes, and the mesh hole diameter of the mesh (32) of the material cage (3) located at the lower layer is larger than the mesh hole diameter of the mesh (32) of the material cage (3) located at the upper layer.

9. A cage stacking MBBR bio-pond according to claim 6, characterized in that: A vertical flow guide tube (7) is provided in the cage (3), and the vertical flow guide tube (7) is located between the two guide plates (34). The distance between the lower end of the vertical flow guide tube (7) and the bottom surface of the cage (3) is greater than 10 cm. The lower end of the vertical flow guide tube (7) is fixedly connected to the bottom surface of the cage (3) via a flow guide support rod (8), and the distance between the upper end of the vertical flow guide tube (7) and the top surface of the cage (3) is greater than 5 cm.

10. The cage stacking MBBR bio-pond according to claim 9, characterized in that: A plurality of collision protrusions (71) are distributed on the inner wall of the vertical flow guide tube (7).

Images