A material cage stacking type MBBR biological tank

Abstract

The application discloses a material cage stacking type MBBR biological pool, which comprises a pool body, a material rack and material cages, the material rack is fixed in the pool body, and vertical guide grooves are arranged on the material rack; 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 rack. MBBR fillers are filled in the material cages, and the MBBR fillers are selected or combined according to different water qualities, so that the advantages of different fillers can be exerted. The application has the following remarkable effects: a plurality of MBBR cages can be stacked in the biological pool, the MBBR cages can be quickly hoisted and lowered, the replacement difficulty of the MBBR fillers is reduced, the replacement time of the MBBR fillers is shortened, the oxygenation performance of the fillers is improved, the ammonia nitrogen concentration of effluent is reduced, and the treatment effect is improved.

Description

Technical Field

[0001] This invention relates to the field of environmental protection technology, specifically to a device for treating domestic sewage. Background Technology

[0002] MBBR technology is widely used in enhanced wastewater treatment. The basic principle of MBBR is to add a certain amount of suspended packing material with a density close to that of water to the aeration tank as a microbial growth carrier to increase the types and quantities of microorganisms in the reactor. In traditional MBBR, the packing material is laid in a material cage, which is fixed in the biological tank.

[0003] With the increasing variety of MBBR packing materials in recent years, different types of MBBR packing materials can be selected for different water qualities and conditions. Fixing the MBBR packing cage in the biological tank will undoubtedly increase the difficulty of replacing the packing material, prolong the replacement time, and thus affect the production rhythm. Summary of the Invention

[0004] In view of this, the present invention provides a solution for facilitating rapid replacement of MBBR packing. The main technical solution adopted is as follows:

[0005] A stacked cage-type MBBR biological tank, the key features of which are: a tank body, a feed rack, and feed cages, wherein the feed rack is fixed inside the tank body and the feed rack is provided with a vertical guide groove;

[0006] Multiple material cages are stacked vertically inside the pool. Each material cage is provided with a guide portion that matches the guide groove. The guide portion is located inside the guide groove, and the material cage can slide vertically along the material rack.

[0007] The feed cage is filled with MBBR packing material. The MBBR packing material is selected or combined according to different water qualities to give full play to the advantages of different packing materials. The feed cage can be in various forms such as cuboid block, disc, cylinder, and sheet. The guide part and guide groove work together to provide a stable guiding effect for the feed cage. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of the present invention;

[0009] Figure 2 This is a schematic diagram of the external structure of the material cage 3;

[0010] Figure 3 This is a schematic diagram of the structure of anchor 6;

[0011] Figure 4 A schematic diagram showing the connection relationship between the guide channel steel 21 and the inner wall of the pool body 1;

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

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

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

[0015] Figure 8 Dissolved oxygen-time curves for using a conventional packing solution and for using the solution of this invention;

[0016] Figure 9 The ammonia nitrogen concentration-time curves are shown for using a conventional packing scheme and using the scheme of the present invention. Detailed Implementation

[0017] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0018] like Figure 1 , 2 As shown in Figures 3 and 4, a stacked cage type MBBR biological tank includes a tank body 1, a feed rack 2, and a feed cage 3. The feed rack 2 is fixed inside the tank body 1, and the feed rack 2 is provided with a vertical guide groove 2a.

[0019] Multiple material cages 3 are vertically stacked inside the pool body 1. Each material cage 3 is provided with a guide part 4 that matches the guide groove 2a. The guide part 4 is located inside the guide groove 2a. 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, and the material cages 3 are filled with MBBR filler.

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

[0022] The lower end of the guide channel steel 21 is fixed with a base plate 22, and the base plate 22 is fixed to the bottom surface of the pool 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 pool body 1 by anchors 6.

[0023] A specific implementation of an anchor 6 is as follows:

[0024] The anchor 6 includes a channel steel stabilizer bar 61 and two channel steel stabilizer seats 62.

[0025] The channel steel stabilizing rod 61 is horizontally arranged, and two guide channel steels 21 are fixedly connected (welded) to both ends of the channel steel stabilizing rod 61. Both ends of the channel steel stabilizing rod 61 are fixedly connected to the inner wall of the pool body 1 through fixing seats 63. The fixing seats 63 are fixedly connected to the inner wall of the pool body 1 through expansion bolts.

[0026] Two channel steel stabilizing seats 62 correspond to two guide channel steels 21. 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. The channel steel stabilizing seats 62 are fixedly connected (welded) to the corresponding guide channel steels 21. The guide channel steels 21 are located between the channel steel stabilizing rod 61 and the corresponding channel steel stabilizing seat 62.

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

[0028] The feed cage 3 includes a cubic feed cage frame 31, which can be welded from angle steel. A mesh 32 covers the feed cage frame 31, and the edges of the mesh 32 are welded and fixed to the feed cage frame 31. The feed cage 3 has vertically oriented support legs 5 at its bottom, located below the feed cage frame 31 and close to the edge of the feed cage 3. The upper ends of the vertically oriented support legs 5 are fixedly connected to the feed cage frame 31. The vertically oriented support legs 5 are used to suspend the feed cage 3 for aeration. The vertically oriented support legs 5 of the lowest feed cage 3 contact the bottom of the tank body 1 or the bottom plate 22, while the vertically oriented support legs 5 of the upper feed cage 3 are supported on the feed cage 3 of the next lower layer.

[0029] The top of the material cage frame 31 is provided with two lifting lugs 33 for lifting or lowering the material cage 3.

[0030] The guide section 4 includes two left guide sections and two right guide sections. The two left guide sections correspond to one guide channel steel 21, and the two right guide sections correspond to another guide channel steel 21. The two left guide sections are connected to one vertical side strip of the cage frame 31 and are distributed vertically. The two right guide sections are connected to another vertical side strip of the cage frame 31 and are distributed vertically. The left guide sections and right guide sections are close to the same side of the cage frame 31.

[0031] The guide part 4 includes a limiting head and a limiting connection part. The limiting head is located in the corresponding vertical guide groove 2a, and the limiting connection part fixes the limiting head and the material cage frame 31.

[0032] The bottom of the pool body 1 is also provided with an aeration pipe network, and an aeration head is provided on the aeration pipe network. The aeration pipe network and the aeration head are located below the material cage 3.

[0033] Combination Figure 5 , 6 As can be seen from section 7: Two guide vanes 34 are positioned opposite each other inside the feed cage 3. These guide vanes 34 are inclined, with their lower edges connected to the bottom of the feed cage 3 and their upper edges connected to the sidewall of the feed cage 3. An inverted trapezoidal fluidized zone is formed between the two guide vanes 34. Packing blocks are laid within this trapezoidal fluidized zone, with the total volume of the packing blocks accounting for 70% of the total volume of the trapezoidal fluidized zone. The aeration head is located directly below the trapezoidal fluidized zone. Gas enters and rises through the lower part of the trapezoidal fluidized zone, pushing and guiding the packing blocks upwards and oxygenating them. After rising to the top of the feed cage 3, the packing blocks are constrained and dispersed outwards, then fall and gather along the guide vanes 34, thus circulating and fluidizing within the trapezoidal fluidized zone.

[0034] The volume of the packing block in the lower layer of the cage 3 is larger than the volume of the packing block in the upper layer of the cage 3.

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

[0036] The material cage 3 is equipped with a vertical guide tube 7, which is located between the two guide vanes 34. The lower end of the vertical guide tube 7 is more than 10 cm away from the bottom surface of the material cage 3, and the lower end of the vertical guide tube 7 is fixedly connected to the bottom surface of the material cage 3 by a guide support rod 8. The upper end of the vertical guide tube 7 is more than 5 cm away from the top surface of the material cage 3. The inner wall of the vertical guide tube 7 is distributed with a number of collision protrusions 71. The collision protrusions 71 are triangular pyramidal in shape and 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 tank 1 in this invention, and air was introduced into the aeration head. After running for a period of time, the dissolved oxygen and influent and effluent ammonia nitrogen concentrations were measured daily, and the results are shown below. Figure 8 , 9 ;

[0038] Wastewater treatment was performed using a conventional packing system. The only difference between the conventional packing system and the system described in this invention is that the conventional packing system does not have guide vanes 34, vertical guide tubes 7, or collision protrusions 71 inside the material cage 3. After operating for the same period, dissolved oxygen and influent / effluent ammonia nitrogen concentrations were measured daily, and the results are shown below. Figure 8 , 9.

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

[0040] Beneficial effects: Using the technical solution of this invention, multiple MBBR material cages can be stacked within the biological treatment tank, and the MBBR material cages can be quickly hoisted and lowered, reducing the difficulty and time required for replacing the MBBR packing material; it also improves the oxygenation performance of the packing material and reduces the ammonia nitrogen concentration in the effluent. This enhances the treatment effect.

[0041] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention. Those skilled in the art, under the guidance of the present invention, can make various similar representations without departing from the spirit and claims of the present invention, and such modifications all fall within the protection scope of the present invention.

Claims

1. A stacked cage type MBBR biological reactor, characterized in that: It includes a pool body (1), a material rack (2), and a material cage (3). The material rack (2) is fixed inside the pool body (1), and the material rack (2) is provided with a vertical guide groove (2a). Multiple material cages (3) are stacked vertically in sequence in the pool body (1). Each material cage (3) is provided with a guide part (4) that matches the guide groove (2a). The guide part (4) is located in the guide groove (2a). The material cage (3) can slide vertically along the material rack (2). The bottom of the material cage (3) is provided with a heightening support (5), and the heightening support (5) is located near the edge of the material cage (3); The material rack (2) includes two guide channel steels (21) arranged opposite each other. The guide channel steels (21) are arranged vertically and are close to the two opposite inner walls of the pool body (1). The slots of the two guide channel steels (21) are arranged opposite each other. The lower end of the guide channel steel (21) is fixed with a base plate (22), which is fixed to the bottom surface of the pool body (1) by expansion bolts, and the upper part of the guide channel steel (21) is fixed to the inner wall of the pool body (1) by anchors (6). The inner cavity of the guide channel steel (21) forms the guide groove (2a); The anchor (6) includes a channel steel stabilizer bar (61) and a channel steel stabilizer seat (62). The channel steel stabilizing rod (61) is set horizontally, and the two ends of the channel steel stabilizing rod (61) are respectively connected to the two guide channel steels (21). The two ends of the channel steel stabilizing rod (61) are respectively fixedly connected to the inner wall of the pool body (1) through the fixing seat (63). There are two channel steel stabilizing seats (62), and 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). The guide channel steels (21) are located between the channel steel stabilizing rod (61) and the corresponding channel steel stabilizing seat (62). The cage (3) includes a cubic cage frame (31), the cage frame (31) is covered with a mesh (32), the lifting legs (5) are vertically arranged, the lifting legs (5) are located below the cage frame (31), the upper end of the lifting legs (5) is fixedly connected to the cage frame (31), and the top of the cage frame (31) is provided with a lifting lug (33). Two guide vanes (34) are provided directly inside the material cage (3). The guide vanes (34) are inclined. The lower edge of the guide vanes (34) is connected to the bottom of the material cage (3), and the upper edge of the guide vanes (34) is connected to the side wall of the material cage (3). An inverted trapezoidal fluidization zone is formed between the two guide vanes (34). The trapezoidal fluidized zone is filled with packing blocks, the total volume of which accounts for 70% of the volume of the trapezoidal fluidized zone; The volume of the packing block in the lower layer of the cage (3) is larger than the volume of the packing block in the upper layer of the cage (3); The mesh (32) is densely covered with mesh holes, and the mesh hole diameter of the mesh (32) of the lower layer of the cage (3) is larger than that of the mesh (32) of the upper layer of the cage (3). The material cage (3) is provided with a vertical guide tube (7), which is located between the two guide plates (34). The lower end of the vertical guide tube (7) is more than 10cm away from the bottom surface of the material cage (3). The lower end of the vertical guide tube (7) is fixedly connected to the bottom surface of the material cage (3) by a guide support rod (8). The upper end of the vertical guide tube (7) is more than 5cm away from the top surface of the material cage (3). The inner wall of the vertical guide tube (7) is provided with several collision protrusions (71). The bottom of the pool (1) is also provided with an aeration pipe network, and an aeration head is provided on the aeration pipe network. The aeration pipe network and the aeration head are located below the material cage (3). The collision bump (71) is in the shape of a triangular pyramid; The outer diameter of the vertical guide tube (7) is smaller than the distance between the lower edges of the two guide vanes (34).

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