Sewage acidification and oxidation system

Abstract

A sewage acidification and oxidation system comprises a hydrolysis acidification pool and a contact oxidation pool, the hydrolysis acidification pool comprises a hydrolysis acidification pool body (20), a stirring device and a sewage sedimentation pool (21), the stirring device is installed in the hydrolysis acidification pool body (20), sewage in the hydrolysis acidification pool body (20) is evenly mixed through the stirring device, and the sewage sedimentation pool (21) is located on one side of the hydrolysis acidification pool body (20); the hydrolysis acidification tank has the advantages that the hydrolysis acidification tank adopts a stirring mode of matching aeration and stirring blades, so that the stirring and mixing efficiency is higher, the stirring time is shortened, and sludge is precipitated in the sludge concentration tank and is conveniently discharged in a concentrated manner. The biological membrane filler of the contact oxidation pond is high in replacement speed, a small amount of biological membrane filler at the corresponding position can be taken out as required, and the reaction speed of the contact oxidation pond is high.

Description

Technical Field

[0001] The utility model relates to the field of sewage treatment equipment, and particularly relates to a sewage acidification and oxidation system. Background Art

[0002] At present, hydrolysis acidification treatment is mainly used to remove suspended solids in sewage and improve the biodegradability of sewage, so as to reduce the load of subsequent biochemical treatment processes. Hydrolysis acidification ponds have been widely used in the treatment of printing and dyeing, pharmaceutical, chemical and municipal sewage, etc., and good results have been achieved. The hydrolysis acidification treatment process mainly quickly and evenly mixes sludge with sewage, so as to quickly intercept and adsorb particulate matter and colloidal matter in the influent. Since the sludge contains a high concentration of facultative microorganisms, under the anoxic conditions in the pond, the intercepted organic matter is hydrolyzed into soluble substances by a large number of hydrolysis acidification bacteria, and macromolecular and difficult-to-biodegrade substances are converted into easily biodegradable substances. The existing hydrolysis acidification ponds have a long stirring time and cannot quickly mix the sludge and sewage evenly, which prolongs the treatment time, and it is more difficult to discharge the sludge precipitated after hydrolysis acidification.

[0003] One of the essences of biological contact oxidation treatment technology is to fill the pond with packing materials. The aerated sewage submerges all the packing materials and flows through the packing materials at a certain flow rate. Biological membranes are covered on the packing materials. The sewage comes into extensive contact with the biological membranes. Under the action of the metabolic functions of microorganisms on the biological membranes, organic pollutants in the sewage are removed and the sewage is purified. Therefore, the biological contact oxidation treatment technology is also called "submerged biological filter". Another essence is to adopt the same aeration method as that of an aeration pond, install the aerator at the bottom of the pond, provide the oxygen required by microorganisms, and play a role in stirring and mixing. In this way, this technology is equivalent to filling the aeration pond with packing materials for microorganisms to inhabit, so it is also called "contact aeration method". The main feature of the biological contact oxidation method is to use packing materials with high porosity and large specific surface area immersed in water, and provide aerobic biological membranes on their surfaces for the attachment and growth of microorganisms. Because of its large surface area, a large amount of biomass can be attached. At the same time, because of its large porosity, the entry of substrates, the removal of metabolites, and the self-renewal and shedding of biological membranes are all relatively smooth, so that the biological membranes can maintain high activity and relatively high biochemical reaction rates. It is difficult to replace the biological membrane packing materials in the existing contact oxidation ponds. A large number of biological membrane packing materials need to be taken out at the same time for replacement. Content of the Utility Model

[0004] The purpose of the utility model is to provide a sewage acidification and oxidation system aiming at the above deficiencies.

[0005] The utility model includes a hydrolysis acidification pond and a contact oxidation pond.

[0006] The hydrolysis acidification tank includes a hydrolysis acidification tank body, a stirring device, and a sewage sedimentation tank.

[0007] The stirring device is installed inside the hydrolysis acidification tank body. The sewage inside the hydrolysis acidification tank body is evenly mixed through the stirring device. The sewage sedimentation tank is located on one side of the hydrolysis acidification tank body. A sewage pump is provided on the hydrolysis acidification tank body. The sewage inside the hydrolysis acidification tank body is pumped out to the sewage sedimentation tank through the sewage pump. The bottom of the sewage sedimentation tank is inclined. A sludge concentration tank is provided at the lower end of the bottom of the sewage sedimentation tank. A sewage extraction pipe is provided on the pool wall of the sewage sedimentation tank on one side of the sludge concentration tank.

[0008] The contact oxidation tank includes an oxidation tank body, a group of filler barrel racks, an aeration pipe, and a water inlet pipe.

[0009] An outlet channel is provided at the top of the oxidation tank body. A drain outlet is provided on one side of the outlet channel. A sludge discharge outlet is provided at the bottom of the oxidation tank body. A barrel support is provided on the inner wall of the upper part of the oxidation tank body. A group of filler barrel racks are arranged and installed in the barrel support in sequence. The filler barrel racks are filled with biological film fillers. The water inlet pipe is installed at the lower part of the filler barrel racks. The aeration pipe is installed between the filler barrel racks and the aeration pipe.

[0010] A supernatant discharge outlet is provided on the upper pool wall of the sewage sedimentation tank. The supernatant discharge outlet is connected to a water pump through a pipe. The water outlet of the water pump is connected and communicated with the water inlet pipe.

[0011] The stirring device includes a hollow shaft, a rotary joint, and a chain drive mechanism. One end air inlet of the hollow shaft is connected and communicated with the air outlet of the rotary joint. The hollow shaft is movably and sealedly installed inside the hydrolysis acidification tank body. A group of stirring blades are provided on the hollow shaft. An air transmission channel connected to the inner cavity of the hollow shaft is opened inside the stirring blades. A group of hollow rods are arranged in sequence on the blades of the stirring blades. An aeration nozzle is provided at one end of the hollow rod. The inner cavity of the hollow rod is connected and communicated with the air transmission channel of the stirring blades. The shaft drive motor drives the hollow shaft to rotate through the chain drive mechanism. A motor support is provided on the pool wall of the hydrolysis acidification tank body. The shaft drive motor is installed on the motor support. The large sprocket of the chain drive mechanism is installed on the hollow shaft. The small sprocket of the chain drive mechanism is installed on the power output shaft of the shaft drive motor. The air inlet of the rotary joint is connected and communicated with the air outlet of the gas compressor through a pipe.

[0012] The water suction pipe of the sewage pump is vertically downward and close to the inner bottom surface of the hydrolysis acidification tank body. The water discharge pipe of the sewage pump is located above the sewage sedimentation tank.

[0013] A U-shaped water pump support is provided at the top of the hydrolysis acidification tank body. The sewage pump is installed on the U-shaped water pump support.

[0014] The sewage extraction pipe is connected and communicated with the inlet end of the sludge pump; the connection between the sludge concentration tank and the inner bottom surface of the sewage sedimentation tank is a sloping surface.

[0015] The packing bucket rack includes a top plate, a bottom plate, a group of connecting rods and an upper pressing plate. The top plate is annular. Multiple groups of water-permeable holes are formed in the bottom plate. A group of connecting rods are annularly and evenly installed between the top plate and the bottom plate. The upper pressing plate is installed on the top plate through bolts. A guiding rod is arranged inside the packing bucket rack. A limiting ring is arranged at the lower part of the guiding rod. A bushing is arranged in the middle of the bottom plate. The bottom of the guiding rod is located inside the bushing, and the limiting ring abuts against the top end of the bushing. A group of packing installation disks are arranged in sequence on the guiding rod. The biological membrane packing is installed on the packing installation disks. A guiding hole is formed in the middle of the upper pressing plate, and the top of the guiding rod is located inside the guiding hole. The packing installation disk is composed of an inner ring, an outer ring, a sleeve and a group of connecting skeletons. A group of connecting skeletons are annularly and evenly installed on the outer wall of the sleeve with the sleeve as the center. A group of packing installation grooves are annularly and evenly formed in the inner ring and the outer ring. The biological membrane packing is installed in the packing installation grooves. The inner ring and the outer ring are installed on a group of connecting skeletons from the inside to the outside. The sleeve is sleeved on the guiding rod. Fixing pieces are respectively arranged at both ends of the top plate, and the top plate is detachably installed on the bucket body support through the fixing pieces.

[0016] The aeration pipeline is installed in the oxidation tank body through the grid support, and the air inlet of the aeration pipeline is connected to the output port of the air compressor through a pipeline.

[0017] A group of water outlet ports are arranged on the water inlet pipeline, and the water outlet ports are located at the lower part between two adjacent packing bucket racks.

[0018] Valves are respectively arranged at the drainage port of the water outlet channel, the sludge discharge port of the oxidation tank body, the aeration pipeline and the water inlet pipeline.

[0019] The advantages of the present utility model are as follows: The hydrolysis acidification tank adopts a stirring method combining aeration and stirring blades, which makes the stirring and mixing efficiency higher, reduces the stirring time, and the sludge precipitates in the sludge concentration tank, which is convenient for centralized discharge.

[0020] The replacement speed of the biological membrane packing in the contact oxidation tank is fast, and a small amount of biological membrane packing at the corresponding position can be taken out according to needs. The reaction speed of the contact oxidation tank is fast. Description of the Drawings

[0021] Figure 1 It is a top view structural schematic diagram of the hydrolysis acidification tank of the present utility model.

[0022] Figure 2 It is a sectional view structural schematic diagram of the sewage sedimentation tank of the present utility model.

[0023] Figure 3 It is a structural schematic diagram of the hydrolysis acidification tank body of the present utility model.

[0024] Figure 4 It is a structural schematic diagram of the stirring device of the hydrolysis acidification tank of the present utility model.

[0025] Figure 5It is a schematic structural diagram of the sewage pump in the hydrolysis acidification tank of the present utility model.

[0026] Figure 6 It is a schematic structural diagram of the contact oxidation tank of the present utility model.

[0027] Figure 7 It is a schematic structural diagram of the packing barrel rack of the present utility model installed on the barrel body bracket.

[0028] Figure 8 It is a schematic structural diagram of the packing barrel rack of the present utility model.

[0029] Figure 9 It is a schematic structural diagram of the present utility model when a guide rod is placed into the packing barrel rack.

[0030] Figure 10 It is a schematic structural diagram of the packing installation disc of the present utility model. Specific embodiments

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. Usually, the components of the embodiments of the present invention described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0033] It should be noted that: similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0034] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, in the description of the present invention, if terms such as "first", "second", etc. are used only for distinguishing descriptions, they cannot be understood as indicating or implying relative importance.

[0035] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0036] As shown in the attached drawings, the utility model includes a hydrolysis acidification tank and a contact oxidation tank.

[0037] The hydrolysis acidification tank includes a hydrolysis acidification tank body 20, a stirring device, and a sewage sedimentation tank 21.

[0038] The stirring device is installed in the hydrolysis acidification tank body 20 to mix the sewage in the hydrolysis acidification tank body 20 evenly. The sewage sedimentation tank 21 is located on one side of the hydrolysis acidification tank body 20. A sewage pump 22 is provided on the hydrolysis acidification tank body 20 to pump the sewage in the hydrolysis acidification tank body 20 into the sewage sedimentation tank 21. The bottom of the sewage sedimentation tank 21 is inclined, and a sludge concentration tank 23 is provided at the bottom of the lower end of the sewage sedimentation tank 21. A sewage extraction pipe 24 is provided on the tank wall of the sewage sedimentation tank 21 on one side of the sludge concentration tank 23.

[0039] The contact oxidation tank includes an oxidation tank body 50, a group of packing barrel racks 51, an aeration pipe 52, and an inlet pipe 53.

[0040] An outlet channel 54 is provided at the top of the oxidation tank body 50, and a drain port is provided on one side of the outlet channel 54. A sludge discharge port is provided at the bottom of the oxidation tank body 50. A barrel support 55 is provided on the upper inner wall of the oxidation tank body 50. A group of packing barrel racks 51 are arranged and installed in the barrel support 55 in sequence. The packing barrel racks 51 are filled with biological film packing. The inlet pipe 53 is installed at the lower part of the packing barrel racks 51, and the aeration pipe 52 is installed between the packing barrel racks 51 and the aeration pipe 52.

[0041] An upper clear liquid discharge port is provided on the upper tank wall of the sewage sedimentation tank 21. The upper clear liquid discharge port is connected to a water pump through a pipe, and the water pump outlet is communicated with the inlet pipe 53.

[0042] The stirring device includes a hollow shaft 25, a rotary joint 26 and a chain drive mechanism 27. One end air inlet of the hollow shaft 25 is communicated with the air outlet of the rotary joint 26. The hollow shaft 25 is movably and sealedly installed in the hydrolysis acidification tank body 20. A set of stirring blades 28 is arranged on the hollow shaft 25. An air delivery channel communicated with the inner cavity of the hollow shaft 25 is opened in the stirring blades 28. A set of hollow rods 29 are arranged in sequence on the blades of the stirring blades 28. An aeration nozzle is arranged at one end of the hollow rod 29. The inner cavity of the hollow rod 29 is communicated with the air delivery channel of the stirring blades 28. The shaft drive motor 31 drives the hollow shaft 25 to rotate through the chain drive mechanism 27. A motor bracket is arranged on the pool wall of the hydrolysis acidification tank body 20. The shaft drive motor 31 is installed on the motor bracket. The large sprocket of the chain drive mechanism 27 is installed on the hollow shaft 25. The small sprocket of the chain drive mechanism 27 is installed on the power output shaft of the shaft drive motor 31. The air inlet of the rotary joint 26 is communicated with the air outlet of the gas compressor through a pipeline.

[0043] The suction pipe of the sewage pump 22 is vertically downward and close to the inner bottom surface of the hydrolysis acidification tank body 20. The outlet pipe of the sewage pump 22 is located above the sewage sedimentation tank 21.

[0044] A U-shaped water pump bracket 32 is arranged at the top of the hydrolysis acidification tank body 20. The sewage pump 22 is installed on the U-shaped water pump bracket 32.

[0045] The sewage pumping pipeline 24 is communicated with the inlet end of the sludge pump. The connection between the sludge concentration tank 23 and the inner bottom surface of the sewage sedimentation tank 21 is a slope surface 30.

[0046] The packing bucket rack 51 includes a top plate 56, a bottom plate 57, a set of connecting rods 58 and an upper pressing plate 59. The top plate 56 is annular. Multiple sets of water permeable holes are opened on the bottom plate 57. A set of connecting rods 58 are annularly and evenly installed between the top plate 56 and the bottom plate 57. The upper pressing plate 59 is installed on the top plate 56 through bolts. A guide rod 60 is arranged in the packing bucket rack 51. A limit ring 61 is arranged at the lower part of the guide rod 60. A shaft sleeve is arranged in the middle of the bottom plate 57. The bottom of the guide rod 60 is located in the shaft sleeve. The limit ring 61 abuts against the top end of the shaft sleeve. A set of packing installation plates 62 are arranged in sequence on the guide rod 60. The biological membrane packing is installed on the packing installation plates 62. A guide hole is opened in the middle of the upper pressing plate 59. The top of the guide rod 60 is located in the guide hole. The packing installation plate 62 is composed of an inner ring 63, an outer ring 64, a sleeve 65 and a set of connecting skeletons 66. A set of connecting skeletons 66 are annularly and evenly installed on the outer wall of the sleeve 65 with the sleeve 65 as the center. A set of packing installation grooves are annularly and evenly opened on the inner ring 63 and the outer ring 64. The biological membrane packing is installed in the packing installation grooves. The inner ring 63 and the outer ring 64 are installed on a set of connecting skeletons 66 from the inside to the outside. The sleeve 65 is sleeved on the guide rod 60. Fixing pieces 67 are respectively arranged at both ends of the top plate 56 and are detachably installed on the bucket body bracket 55 through the fixing pieces 67.

[0047] The aeration pipeline 52 is installed in the oxidation tank body 50 through the grid support, and the air inlet of the aeration pipeline 52 is connected to the output port of the air compressor through a pipeline.

[0048] A group of water outlet ports are arranged on the water inlet pipeline 53, and the water outlet ports are located at the lower part between two adjacent packing barrel racks 51.

[0049] Valves are respectively arranged on the drainage port of the water outlet channel 54, the sludge discharge port of the oxidation tank body 50, the aeration pipeline 52 and the water inlet pipeline 53.

[0050] Example 1: The sewage in the regulating tank is pumped into the hydrolysis acidification tank body 20. The shaft drive motor 31 drives the hollow shaft 25 to rotate from the side through the chain drive mechanism 27, and the sewage is stirred and mixed by the stirring blades 28 and the hollow rods 29 thereon. While stirring, the compressed gas (such as carbon dioxide) output by the gas compressor enters the rotary joint 26. The rotary joint 26 can send the compressed gas into the hollow shaft 25 while keeping the hollow shaft 25 rotating. Then the compressed gas enters the air delivery channel in the stirring blade 28, and finally is sprayed out through the aeration nozzles of the hollow rods 29 to form bubbles in the sewage to assist stirring. After the sewage is acidolyzed in the hydrolysis acidification tank and the stirring is completed, the sewage pump 22 is started. The sewage pump 22 pumps out the sewage in the hydrolysis acidification tank body 20 to the sewage sedimentation tank 21 for sedimentation. After the sedimentation is completed, the sludge pump is started to pump out the fluid sludge in the sludge concentration tank 23 to the filter press for treatment. The hard sludge adhering to the inner wall of the sewage sedimentation tank 21 is regularly cleaned manually. The supernatant in the sewage sedimentation tank 21 is pumped out to the contact oxidation tank through a water pump.

[0051] The staff stuffs the flocculent biofilm packing into the packing installation groove, and then winds it on the inner ring 63 and the outer ring 64. After the installation is completed, a group of packing installation discs 62 are sequentially sleeved on the guide rods 60. The staff grabs the top of the guide rod 60 and puts the guide rod 60 into the packing barrel rack 51. The bottom of the guide rod 60 is inserted into the shaft sleeve of the chassis 57, and the guide rod 60 remains vertical. The upper pressing plate 59 is installed on the top disc 56, and the top of the guide rod 60 is located in the guide hole of the upper pressing plate 59.

[0052] Sewage is injected into the oxidation tank body 50 through the water inlet pipeline 53, and compressed air is input through the aeration pipeline 52 to generate bubbles in the sewage, which plays a role in stirring and oxygen supply. The organic pollutants in the sewage are adsorbed and disinfected by the biofilm attached to the biofilm packing. The purified sewage is located at the top of the oxidation tank body 50 and overflows into the water outlet channel 54, and then is transported to the next treatment station through the drainage port. The generated sludge precipitates at the bottom of the oxidation tank body 50 and is output through the sludge discharge port. When it is necessary to replace the biofilm packing, the upper pressing plate 59 is removed from the top disc 56, and then the guide rod 60 is pulled out, and a new biofilm packing can be replaced.

Claims

1. A sewage acidification and oxidation system, characterized in that It includes a hydrolysis acidification tank and a contact oxidation tank. The hydrolysis acidification tank includes a hydrolysis acidification tank body (20), a stirring device, and a sewage sedimentation tank (21). The stirring device is installed inside the hydrolysis acidification tank body (20) to mix the sewage in the hydrolysis acidification tank body (20) evenly. The sewage sedimentation tank (21) is located on one side of the hydrolysis acidification tank body (20). A sewage pump (22) is provided on the hydrolysis acidification tank body (20) to pump the sewage in the hydrolysis acidification tank body (20) into the sewage sedimentation tank (21). The bottom of the sewage sedimentation tank (21) is inclined, and a sludge concentration tank (23) is provided at the lower end of the bottom of the sewage sedimentation tank (21). A sewage extraction pipe (24) is provided on the pool wall of the sewage sedimentation tank (21) on one side of the sludge concentration tank (23). The contact oxidation tank includes an oxidation tank body (50), a group of filler barrel racks (51), an aeration pipe (52), and an inlet pipe (53). An outlet channel (54) is provided at the top of the oxidation tank body (50), and a drain port is provided on one side of the outlet channel (54). A sludge discharge port is provided at the bottom of the oxidation tank body (50). A barrel support (55) is provided on the upper inner wall of the oxidation tank body (50). A group of filler barrel racks (51) are arranged and installed in the barrel support (55) in sequence. The filler barrel racks (51) are filled with biological film fillers. The inlet pipe (53) is installed at the lower part of the filler barrel racks (51), and the aeration pipe (52) is installed between the filler barrel racks (51) and the aeration pipe (52). A supernatant discharge port is provided on the upper pool wall of the sewage sedimentation tank (21). The supernatant discharge port is connected to a water pump through a pipe, and the water outlet of the water pump is connected to the inlet pipe (53).

2. The sewage acidification and oxidation system according to claim 1, characterized in that, The stirring device includes a hollow shaft (25), a rotary joint (26), and a chain drive mechanism (27). One end air inlet of the hollow shaft (25) is connected to the air outlet of the rotary joint (26). The hollow shaft (25) is movably and sealedly installed inside the hydrolysis acidification tank body (20). A group of stirring blades (28) are provided on the hollow shaft (25). An air delivery channel communicating with the inner cavity of the hollow shaft (25) is opened in the stirring blades (28). A group of hollow rods (29) are arranged in sequence on the blades of the stirring blades (28). An aeration nozzle is provided at one end of the hollow rod (29). The inner cavity of the hollow rod (29) is connected to the air delivery channel of the stirring blades (28). The shaft drive motor (31) drives the hollow shaft (25) to rotate through the chain drive mechanism (27). A motor support is provided on the pool wall of the hydrolysis acidification tank body (20), and the shaft drive motor (31) is installed on the motor support. The large sprocket of the chain drive mechanism (27) is installed on the hollow shaft (25), and the small sprocket of the chain drive mechanism (27) is installed on the power output shaft of the shaft drive motor (31). The air inlet of the rotary joint (26) is connected to the air outlet of the gas compressor through a pipe.

3. A sewage acidification and oxidation system according to claim 1, characterized in that, The water suction pipe of the sewage pump (22) is vertically downward and close to the inner bottom surface of the hydrolysis acidification tank body (20), and the water outlet pipe of the sewage pump (22) is located above the sewage sedimentation tank (21).

4. A sewage acidification and oxidation system according to claim 1, characterized in that, At the top of the hydrolysis acidification tank body (20), a U-shaped water pump support (32) is provided, and the sewage pump (22) is installed on the U-shaped water pump support (32).

5. A sewage acidification and oxidation system according to claim 1, characterized in that, The sewage extraction pipeline (24) is communicated with the inlet end of the sludge pump; the connection part between the sludge concentration tank (23) and the inner bottom surface of the sewage sedimentation tank (21) is a slope surface (30).

6. The sewage acidification and oxidation system according to claim 1, wherein The packing bucket rack (51) includes a top plate (56), a bottom plate (57), a group of connecting rods (58) and an upper pressing plate (59). The top plate (56) is annular. Multiple groups of water permeable holes are formed on the bottom plate (57). A group of connecting rods (58) are annularly and evenly installed between the top plate (56) and the bottom plate (57). The upper pressing plate (59) is installed on the top plate (56) through bolts. A guide rod (60) is arranged inside the packing bucket rack (51). A limit ring (61) is arranged at the lower part of the guide rod (60). A bushing is arranged in the middle of the bottom plate (57). The bottom of the guide rod (60) is located inside the bushing. The limit ring (61) abuts against the top end of the bushing. A group of packing installation discs (62) are arranged in sequence on the guide rod (60). The biofilm packing is installed on the packing installation discs (62). A guide hole is formed in the middle of the upper pressing plate (59). The top of the guide rod (60) is located inside the guide hole. The packing installation disc (62) is composed of an inner ring (63), an outer ring (64), a sleeve (65) and a group of connecting skeletons (66). A group of connecting skeletons (66) are annularly and evenly installed on the outer wall of the sleeve (65) with the sleeve (65) as the center. A group of packing installation grooves are annularly and evenly formed on the inner ring (63) and the outer ring (64). The biofilm packing is installed in the packing installation grooves. The inner ring (63) and the outer ring (64) are installed on a group of connecting skeletons (66) from the inside to the outside. The sleeve (65) is sleeved on the guide rod (60). Fixing pieces (67) are respectively arranged at both ends of the top plate (56), and the packing bucket rack (51) is detachably installed on the bucket body support (55) through the fixing pieces (67).

7. A sewage acidification and oxidation system according to claim 1, characterized in that, The aeration pipeline (52) is installed inside the oxidation tank body (50) through a grid support. The air inlet of the aeration pipeline (52) is communicated with the output port of the air compressor through a pipeline.

8. A sewage acidification and oxidation system according to claim 1, wherein, A group of water outlet ports are arranged on the water inlet pipeline (53), and the water outlet ports are located at the lower part between two adjacent packing bucket racks (51).

9. A sewage acidification and oxidation system according to claim 1, characterized in that, Valves are respectively arranged at the drainage port of the water outlet channel (54), the sludge discharge port of the oxidation tank body (50), the aeration pipeline (52) and the water inlet pipeline (53).

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