CN214990564U

CN214990564U - Sewage purification treatment device

Info

Publication number: CN214990564U
Application number: CN202121072497.XU
Authority: CN
Inventors: 唐国栋
Original assignee: Guangzhou Xinghe Environment Technology Co ltd
Current assignee: Guangzhou Xinghe Environment Technology Co ltd
Priority date: 2021-05-18
Filing date: 2021-05-18
Publication date: 2021-12-03
Anticipated expiration: 2031-05-18

Abstract

The utility model discloses a sewage purification treatment device, include: the inner tank, inner tank cover has been installed at the inner tank top, the sealed chamber between inner tank and the inner tank cover constitutes anaerobic reaction district, inner tank bottom is equipped with the water inlet, anaerobic three-phase separator has been installed to anaerobic reaction district's upper end, inner tank outside cover is equipped with outer jar, cavity between inner tank and the outer jar constitutes oxygen deficiency reaction district and aerobic reaction district, sewage water conservancy diversion after anaerobic three-phase separator handles in the anaerobic reaction district to the oxygen deficiency reaction district, sewage water conservancy diversion after the oxygen deficiency reaction in the oxygen deficiency reaction district to the aerobic reaction district, be equipped with aerobic three-phase separator in the aerobic reaction district, the delivery port has been seted up to aerobic reaction district upper end, aerobic three-phase separator bottom and oxygen deficiency reaction district intercommunication, the aerator has all been installed to oxygen deficiency reaction district and aerobic reaction district bottom. The anoxic reaction zone, the aerobic reaction zone and the anaerobic reaction zone adopt an internal and external coating structure, so that the structure is more compact, the occupied area is small, and the maintenance of the anaerobic reaction zone is convenient.

Description

Sewage purification treatment device

Technical Field

The utility model relates to an industrial wastewater treatment field, concretely relates to sewage purification treatment device.

Background

The biochemical treatment method in the sewage treatment field is the most common method, the sewage biochemical treatment is divided into anaerobic treatment and aerobic treatment, the microbial biomass in the sewage treatment equipment and facilities determines the sewage biochemical treatment effect, and the method for improving the microbial biomass of the sewage treatment equipment and facilities mainly adopts unpowered three-phase separation (solid-liquid-gas) and powered solid-liquid separation (such as MBR and the like).

The patent "a novel anaerobism good oxygen integration bioreactor" (patent number 201521126921.9) discloses "jar body, the internal reaction chamber that has of jar, be equipped with the division board in the reaction chamber, the division board will the reaction chamber falls into the anaerobism reaction chamber and is located the aerobic reaction chamber above the anaerobism reaction chamber, be equipped with on the division board and be used for making waste water follow one-way flow in between the anaerobism reaction chamber the limbers of aerobic reaction chamber, the anaerobism reaction chamber has the waste water import, the aerobic reaction chamber has the mouth of respiration", this patent exists following defect: 1. the patent is not provided with an anoxic reaction chamber, and can not carry out denitrification reaction on sewage, so that nitric acid nitrogen (NO3-N) and suspended matters in the sewage can not be removed, and the sewage is not thoroughly purified; 2. the anaerobic reaction chamber is positioned in the tank body below the aerobic reaction chamber, and the anaerobic reaction chamber is of a closed structure, so that the daily maintenance and overhaul of the anaerobic reaction chamber are inconvenient; 3. the anaerobic reaction chamber and the aerobic reaction chamber are overlapped up and down, so that the upper space and the lower space of the reaction tank are greatly limited, and when the anaerobic reaction chamber and the aerobic reaction chamber are aerated, the height of a suspension body in the anaerobic reaction chamber and the aerobic reaction chamber flowing upwards is limited due to the limited height of the anaerobic reaction chamber and the aerobic reaction chamber, so that the anaerobic reaction and the aerobic reaction are insufficient.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome the not enough of prior art, provide a sewage purification treatment device to solve above-mentioned problem.

In order to solve the technical problem, the utility model discloses a following technical scheme: a sewage purification treatment apparatus comprising: the inner tank, inner tank cover has been installed at the inner tank top, the sealed chamber between inner tank and the inner tank cover constitutes sewage and carries out the anaerobic reaction district that anaerobic reaction carried out, inner tank bottom portion is equipped with the water inlet with outside sewage source intercommunication, the anaerobism three-phase separator that is used for carrying out solid, liquid, gas three-phase separation to the result after anaerobic reaction is installed to the upper end in anaerobic reaction district, inner tank outside cover is equipped with the outer jar, cavity between inner tank and the outer jar constitutes sewage and carries out the anoxic reaction district that anaerobic reaction carries out, sewage water conservancy diversion after anaerobic three-phase separator handles in the anaerobic reaction district to the anoxic reaction district, cavity between inner tank and the outer jar still constitutes sewage and carries out the aerobic reaction district that aerobic reaction carried out, sewage water conservancy diversion after anaerobic reaction in the anoxic reaction district to the aerobic reaction district, be equipped with in the aerobic reaction district and be used for carrying out solid, the product after aerobic reaction, The aerobic three-phase separator is used for separating liquid from gas, a water outlet for discharging liquid treated by the aerobic three-phase separator is formed in the upper end of the aerobic reaction zone, the bottom of the aerobic three-phase separator is communicated with the anoxic reaction zone, and aerators are arranged at the bottoms of the anoxic reaction zone and the aerobic reaction zone.

As a further improvement of the above technical solution:

the outer tank with install first baffle and second baffle between the inner tank, first baffle and second baffle will the outer tank with cavity between the inner tank separates into oxygen deficiency reaction zone and good oxygen reaction zone, a plurality of through-holes have evenly been seted up to first baffle upper end, good oxygen three-phase separator install in the second baffle is close to one side of good oxygen reaction zone.

The anaerobic three-phase separator comprises a plurality of first separation plates which are arranged side by side and are positioned on the same horizontal plane and a plurality of second separation plates which are arranged side by side and are positioned on the same horizontal plane, the first separating plate and the second separating plate are both of an angle plate structure formed by two straight plates extending upwards in an inclined way, an included angle formed by the intersection of the two straight plates faces upwards, the second separation plate is positioned at the lower side of the first separation plate, the first separation plate and the second separation plate are arranged in a left-right staggered mode, an anaerobic gap is formed between the first separation plate and the second separation plate, the top of the first separation plate is communicated with a gas collecting pipe, the gas collecting pipe is far away from one end of the first separation plate and communicated with the outside, an anaerobic water collecting tank is arranged at the upper end of a precipitation area formed by the first separation plate, the second separation plate and the inner tank in a surrounding mode, and the anaerobic water collecting tank is communicated with the anoxic reaction area.

The included angle between the two straight plates of the second separation plate is larger than the included angle between the two straight plates of the first separation plate.

The anaerobic water collecting tank is arranged on the inner wall of the inner tank and is a circular groove or a strip-shaped groove.

The good oxygen three-phase separator includes guide plate, breakwater, filler plate, fender and good oxygen water catch bowl, the guide plate parallel install the outside of breakwater and with the breakwater forms good oxygen clearance, guide plate and breakwater are by lower extreme swash plate and the vertical board integrated into one piece in upper end, the upper end of breakwater is higher than the guide plate, the lower extreme length weak point of breakwater in the lower extreme length of guide plate, the filler plate of slope has been installed in the settling zone that guide plate, inner tank, outer jar and second separator formed, good oxygen water catch bowl has been installed to the settling zone upper end, good oxygen water catch bowl with the delivery port intercommunication, the settling zone bottom with the oxygen deficiency reaction zone intercommunication, the one end of fender is connected the inner tank, the other end of fender with the inner tank outer wall becomes certain angle.

And a water distributor is arranged at the bottom of the anaerobic reaction zone and is communicated with the water inlet.

An outer tank cover is arranged on the top of the outer tank, and an air inlet is formed in the outer tank cover.

Compared with the prior art, the utility model has the advantages of:

1. the microbial biomass of different types of microorganisms in the anaerobic reaction zone and the aerobic reaction zone can be improved and the biochemical sewage treatment capacity can be improved and ensured by combining the anaerobic three-phase separation and the aerobic three-phase separation, and meanwhile, the aerobic three-phase separator and the anaerobic three-phase separator are concentrated in the integrated equipment, so that an independent special sedimentation tank is not arranged, and the floor area of sewage treatment equipment is reduced.

2. The utility model discloses be provided with the oxygen deficiency reacting chamber, can carry out the denitrification to sewage, consequently be favorable to getting rid of nitric acid nitrogen (NO3-N) and the suspended solid in the sewage, make sewage purification more thorough.

3. The utility model discloses an aerobic reaction district sets up in the anaerobic reaction district outside, and interior cladding structure is adopted in oxygen deficiency reaction district, aerobic reaction district and anaerobic reaction district, and oxygen deficiency reaction district, aerobic reaction district and anaerobic reaction district top are open structure, are convenient for carry out the routine maintenance to oxygen deficiency reaction district, aerobic reaction district and anaerobic reaction district and overhaul.

4. The utility model discloses an inside and outside cladding structure is adopted with good oxygen reaction district in anaerobic reaction district for the structure is compacter, and area is little, and the upper and lower space of reaction tank is not limited on, can increase the reaction height in oxygen deficiency reaction district, good oxygen reaction district and anaerobic reaction district, makes anaerobism, good oxygen and oxygen deficiency reaction more abundant.

5. The bottom of the aerobic three-phase separator is communicated with the anoxic reaction zone, and sludge after aerobic reaction smoothly flows into the anoxic reaction zone, so that the improvement of the content of microorganisms in the anoxic reaction zone is facilitated.

Drawings

Fig. 1 is a top view of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;

fig. 4 is a schematic view of a first separator.

The reference numerals in the figures denote: 1. an inner tank; 2. an inner tank cover; 3. an anaerobic reaction zone; 4. a water inlet; 5. an anaerobic three-phase separator; 51. a first separation plate; 52. a second separation plate; 53. an anaerobic gap; 54. a gas collecting pipe; 55. an anaerobic water collection tank; 6. an outer tank; 7. an anoxic reaction zone; 8. an aerobic reaction zone; 9. an aerobic three-phase separator; 91. a baffle; 92. a water baffle; 93. a filler sheet; 94. a fender; 95. an aerobic water collecting tank; 96. an aerobic gap; 10. a water outlet; 11. an aerator; 12. a first separator; 121. a through hole; 13. a second separator; 14. a water distributor; 15. an outer can cover; 151. and (4) air inlet holes.

Detailed Description

The invention will be described in further detail with reference to the drawings and specific examples.

Fig. 1 to 4 show a sewage purification treatment apparatus of the present embodiment, including: an inner tank 1, an inner tank cover 2 is arranged at the top of the inner tank 1, a sealed cavity between the inner tank 1 and the inner tank cover 2 forms an anaerobic reaction area 3 for anaerobic reaction of sewage, a water inlet 4 communicated with an external sewage source is arranged at the bottom of the inner tank 1, an anaerobic three-phase separator 5 for solid, liquid and gas three-phase separation of products after the anaerobic reaction is arranged at the upper end of the anaerobic reaction area 3, an outer tank 6 is sleeved outside the inner tank 1, a cavity between the inner tank 1 and the outer tank 6 forms an anoxic reaction area 7 for anoxic reaction of sewage, sewage treated by the anaerobic three-phase separator 5 in the anaerobic reaction area 3 is guided to the anoxic reaction area 7, a cavity between the inner tank 1 and the outer tank 6 also forms an aerobic reaction area 8 for aerobic reaction of sewage, sewage after the anoxic reaction in the anoxic reaction area 7 is guided to the aerobic reaction area 8, products after the solid, liquid and gas are subjected to the aerobic reaction in the aerobic reaction area 8, The aerobic three-phase separator 9 for liquid-gas three-phase separation, the upper end of the aerobic reaction zone 8 is provided with a water outlet 10 for discharging the liquid treated by the aerobic three-phase separator 9, the bottom of the aerobic three-phase separator 9 is communicated with the anoxic reaction zone 7, and the bottom of the anoxic reaction zone 7 and the bottom of the aerobic reaction zone 8 are both provided with aerators 11. Sewage enters the anaerobic reaction zone 3 from the water inlet 4 by power provided by an external lifting pump, anaerobic sludge is impacted into a suspension shape by water, anaerobic biochemical reaction is carried out in the anaerobic reaction zone 3, gases such as SO2 and biogas are generated, the sludge, the water and the biogas (SO2 and the like) are separated by the anaerobic three-phase separator 5, anaerobic sludge (microorganism carriers) can be intercepted in the anaerobic reaction zone 3, the gases such as SO2 and the biogas generated by anaerobic are led to high altitude for discharge or combustion utilization, and liquid flows into the anoxic reaction zone 7 for next biochemical reaction. The microbial biomass of different types of microorganisms in the anaerobic reaction zone 3 and the aerobic reaction zone 8 can be improved and the biochemical treatment capacity of sewage can be improved and ensured by combining the anaerobic three-phase separator 5 with the aerobic three-phase separator 9, and meanwhile, the aerobic three-phase separator 9 and the anaerobic three-phase separator 5 are integrated in integrated equipment, so that an independent special sedimentation tank is not arranged, and the floor area of sewage treatment equipment is reduced; the anoxic reaction zone 7 and the aerobic reaction zone 8 are arranged outside the anaerobic reaction zone 3, the anoxic reaction zone 7, the aerobic reaction zone 8 and the anaerobic reaction zone 3 adopt an inner and outer coating structure, so that the structure is more compact, the occupied area is small, the height is not limited, and suspended sludge in each reaction zone can better move upwards to ensure that the reaction is more sufficient. The anoxic reaction zone 7 can realize the denitrification and denitrification effect of sewage, sewage after anaerobic reaction and aerobic sludge separated by the aerobic three-phase separator 9 are subjected to denitrification reaction and denitrification, the sewage and sludge treated by the anoxic reaction zone 7 flow into the aerobic reaction zone 8, the sewage is subjected to aerobic biochemical reaction (biological nitrification) in the aerobic reaction zone 8, the aerobic sludge, gas and sewage brought by the aerator 11 are shunted by the aerobic three-phase separator 9, the aerobic sludge flows back to the anoxic reaction zone 7 to continuously participate in the biochemical reaction, the treated water is discharged, the aerators 11 are arranged in the anoxic reaction zone 7 and the aerobic reaction zone 8 for aeration and stirring, and the aerator 11 is connected with an external aeration fan and an aeration pump to accelerate the transfer of oxygen in the air to liquid, so that the purpose of oxygenation is fulfilled; in addition, the aeration also can prevent the suspension body in the tank from sinking and strengthen the contact between the organic matters in the tank and the microorganisms and the dissolved oxygen, thereby ensuring the oxidative decomposition of the microorganisms in the tank on the organic matters in the sewage under the condition of sufficient dissolved oxygen.

In this embodiment, a first partition plate 12 and a second partition plate 13 are installed between the outer tank 6 and the inner tank 1, the first partition plate 12 and the second partition plate 13 partition a cavity between the outer tank 6 and the inner tank 1 into an anoxic reaction zone 7 and an aerobic reaction zone 8, a plurality of through holes 121 are uniformly formed in the upper end of the first partition plate 12, and the aerobic three-phase separator 9 is installed on one side of the second partition plate 13 close to the aerobic reaction zone 8. The first partition plate 12 and the second partition plate 13 partition the cavity between the inner tank 1 and the outer tank 6 into an anoxic reaction zone 7 and an aerobic reaction zone 8, so that the anoxic reaction and the aerobic reaction are independently carried out, liquid after the anoxic reaction uniformly flows into the aerobic reaction zone 8 from the through hole 121, and is finally separated by the aerobic three-phase separator 9.

In this embodiment, the anaerobic three-phase separator 5 includes a plurality of first separation plates 51 arranged side by side and located on the same horizontal plane, and a plurality of second separation plates 52 arranged side by side and located on the same horizontal plane, each of the first separation plates 51 and the second separation plates 52 is an angle plate structure formed by two straight plates extending obliquely upward and intersecting, an included angle formed by two straight plates intersecting is upward, the second separation plates 52 are located on the lower side of the first separation plates 51, the first separation plates 51 and the second separation plates 52 are arranged in a left-right staggered manner, an anaerobic gap 53 is formed between the first separation plates 51 and the second separation plates 52, the top of the first separation plates 51 is communicated with a gas collecting pipe 54, one end of the gas collecting pipe 54 far away from the first separation plates 51 is communicated with the outside, the first separation plates 51, an anaerobic water collecting tank 55 is arranged at the upper end of a sedimentation area formed by the second separation plate 52 and the inner tank 1, and the anaerobic water collecting tank 55 is communicated with the anoxic reaction area 7. The first separation plate 51 and the second separation plate 52 block sludge below, sewage after anaerobic reaction enters the sedimentation region from the anaerobic gap 53, clear water after sedimentation enters the anaerobic water collection tank 55 and then flows into the anoxic reaction region 7, and gas generated by anaerobic reaction is discharged through the gas collection pipe 54, so that three-phase separation of solid, liquid and gas is realized.

In this embodiment, the angle between the two straight plates of the second separating plate 52 is larger than the angle between the two straight plates of the first separating plate 51. The two sides of the second separation plate 52 block the lower side of the first separation plate 51, so that the sludge is better blocked.

In this embodiment, the anaerobic water collection tank 55 is installed on the inner wall of the inner tank 1, and the anaerobic water collection tank 55 is a circular groove or a strip-shaped groove.

In this embodiment, the aerobic three-phase separator 9 includes a flow guide plate 91, a water baffle 92, a filler plate 93, a mud guard 94 and an aerobic water collecting tank 95, the flow guide plate 91 is disposed in parallel outside the water baffle 92 and forms an aerobic gap 96 with the water baffle 92, the flow guide plate 91 and the water baffle 92 are both integrally formed by a lower end inclined plate and an upper end vertical plate, the upper end of the water baffle 92 is higher than the flow guide plate 91, the lower end of the water baffle 92 is shorter than the lower end of the flow guide plate 91, the inclined filler plate 93 is disposed in a settling zone formed by the flow guide plate 91, the inner tank 1, the outer tank 6 and the second separation plate 52, the aerobic water collecting tank 95 is disposed at the upper end of the settling zone, the aerobic water collecting tank 95 is communicated with the water outlet 10, the bottom of the settling zone is communicated with the anoxic reaction zone 7, one end of the mud guard 94 is connected with the inner tank 1, and the other end of the mud guard 94 forms a certain angle with the outer wall of the inner tank 1. The sewage entering the aerobic reaction zone 8 enters the precipitation zone through an aerobic gap 96 between the guide plate 91 and the water baffle 92, water and small particle gas move upwards, the precipitated water enters the aerobic water collecting tank 95 to flow out, the gas is led to the outside, the filler plate 93 is helpful for the sedimentation of sludge, and the sludge water enters the anoxic reaction zone 7 through an opening at the bottom of the precipitation zone.

In this embodiment, a water distributor 14 is installed at the bottom of the anaerobic reaction zone 3, and the water distributor 14 is communicated with the water inlet 4. The water distributor 14 uniformly disperses the wastewater entering from the water inlet 4 in the anaerobic reaction zone 3 so as to ensure that the wastewater is in full and violent contact with the anaerobic sludge.

In this embodiment, the outer tank cover 15 is installed on the top of the outer tank 6, and the outer tank cover 15 is provided with an air inlet 151. The outer tank cover 15 is arranged on the outer tank 6 to separate the reaction mud from the external environment, so that the external environment and the reaction mud do not interfere with each other.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The technical solution of the present invention can be used by anyone skilled in the art to make many possible variations and modifications, or to modify equivalent embodiments, without departing from the scope of the technical solution of the present invention, using the technical content disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a sewage purification treatment device which characterized in that: the method comprises the following steps: inner tank (1), inner tank cover (2) have been installed at inner tank (1) top, the sealed chamber between inner tank (1) and inner tank cover (2) constitutes anaerobic reaction district (3) that sewage carries out anaerobic reaction, inner tank (1) bottom is equipped with water inlet (4) with outside sewage source intercommunication, anaerobic reaction district's (3) upper end is installed and is used for carrying out solid, liquid, gas three-phase separation's anaerobism three phase separator (5) to the result after the anaerobic reaction, inner tank (1) outside cover is equipped with outer jar (6), the cavity between inner tank (1) and outer jar (6) constitutes anoxic reaction district (7) that sewage carries out anoxic reaction, the sewage water conservancy diversion after anaerobism three phase separator (5) handles in anaerobic reaction district (3) extremely anoxic reaction district (7), the cavity between inner tank (1) and outer jar (6) still constitutes aerobic reaction district (8) that sewage carries out aerobic reaction), the sewage after the anoxic reaction in the anoxic reaction zone (7) is guided to the aerobic reaction zone (8), an aerobic three-phase separator (9) for performing solid-liquid-gas three-phase separation on a product after the aerobic reaction is arranged in the aerobic reaction zone (8), a water outlet (10) for discharging liquid after the aerobic three-phase separator (9) is treated is formed in the upper end of the aerobic reaction zone (8), the bottom of the aerobic three-phase separator (9) is communicated with the anoxic reaction zone (7), and aerators (11) are arranged at the bottoms of the anoxic reaction zone (7) and the aerobic reaction zone (8).

2. The sewage purification treatment apparatus according to claim 1, wherein: outer jar (6) with first baffle (12) and second baffle (13) have been installed between inner tank (1), first baffle (12) and second baffle (13) will outer jar (6) with cavity between inner tank (1) separates into oxygen deficiency reaction zone (7) and aerobic reaction zone (8), a plurality of through-holes (121) have evenly been seted up to first baffle (12) upper end, good oxygen three-phase separator (9) install in second baffle (13) are close to one side of aerobic reaction zone (8).

3. The sewage purification treatment apparatus according to claim 2, wherein: the anaerobic three-phase separator (5) comprises a plurality of first separation plates (51) which are arranged side by side and are positioned on the same horizontal plane and a plurality of second separation plates (52) which are arranged side by side and are positioned on the same horizontal plane, wherein the first separation plates (51) and the second separation plates (52) are both angle plate structures formed by obliquely and upwardly extending two straight plates, the two straight plates are intersected to form an upward included angle, the second separation plates (52) are positioned on the lower side of the first separation plates (51), the first separation plates (51) and the second separation plates (52) are arranged in a left-right staggered mode, anaerobic gaps (53) are formed between the first separation plates (51) and the second separation plates (52), the top parts of the first separation plates (51) are communicated with a gas collecting pipe (54), and one ends, far away from the first separation plates (51), of the gas collecting pipe (54) are communicated with the outside, an anaerobic water collecting tank (55) is arranged at the upper end of a settling area surrounded by the first separation plate (51), the second separation plate (52) and the inner tank (1), and the anaerobic water collecting tank (55) is communicated with the anoxic reaction area (7).

4. The sewage purification treatment apparatus according to claim 3, wherein: the included angle between the two straight plates of the second separating plate (52) is larger than the included angle between the two straight plates of the first separating plate (51).

5. The sewage purification treatment apparatus according to claim 3, wherein: the anaerobic water collecting tank (55) is arranged on the inner wall of the inner tank (1), and the anaerobic water collecting tank (55) is a circular groove or a strip-shaped groove.

6. The sewage purification treatment apparatus according to claim 4, wherein: the aerobic three-phase separator (9) comprises a guide plate (91), a water baffle (92), a filler plate (93), a mud guard (94) and an aerobic water collecting tank (95), wherein the guide plate (91) is arranged on the outer side of the water baffle (92) in parallel and forms an aerobic gap (96) with the water baffle (92), the guide plate (91) and the water baffle (92) are integrally formed by a lower end inclined plate and an upper end vertical plate, the upper end of the water baffle (92) is higher than the guide plate (91), the lower end of the water baffle (92) is shorter than the lower end of the guide plate (91), the inclined filler plate (93) is arranged in a settling zone formed by the guide plate (91), the inner tank (1), the outer tank (6) and the second separating plate (52), the aerobic water collecting tank (95) is arranged at the upper end of the settling zone, and the aerobic water collecting tank (95) is communicated with the water outlet (10), the bottom of the sedimentation zone is communicated with the anoxic reaction zone (7), one end of a mudguard (94) is connected with the inner tank (1), and the other end of the mudguard (94) forms a certain angle with the outer wall of the inner tank (1).

7. The sewage purification treatment apparatus according to any one of claims 1 to 6, wherein: a water distributor (14) is arranged at the bottom of the anaerobic reaction zone (3), and the water distributor (14) is communicated with the water inlet (4).

8. The sewage purification treatment apparatus according to any one of claims 1 to 6, wherein: an outer tank cover (15) is arranged at the top of the outer tank (6), and an air inlet hole (151) is formed in the outer tank cover (15).