CN102372360B - Biological sewage treatment device - Google Patents

Abstract

The invention relates to a tower-type biological sewage treatment device comprising an aerobic reactor and a gas-liquid separation device arranged above the aerobic reactor, wherein a gas redistributor is arranged at an outlet on the upper part of the aerobic reactor, which is connected with liquid in the gas-liquid separation device so that the utilization efficiency of oxygen-containing gas in the aerobic reactor is increased, and the gas-liquid separation effect of the gas-liquid separation device is improved.

Description

Sewage Biological Treatment Plant

technical field

The invention relates to a sewage biological treatment device, in particular to a tower type sewage biological treatment device, comprising an aerobic reactor and a gas-liquid separation device arranged above the aerobic reactor, wherein the upper part of the aerobic reactor is connected to the gas A gas redistributor is provided at the fluid-communicated outlet of the liquid separator.

Background technique

Generally, aerobic biological treatment of sewage can obtain good water quality, but requires a lot of energy for aeration and produces a large amount of solid sludge. Anaerobic biological treatment of sewage consumes less energy and generates little additional sludge, but the water quality obtained is usually poor. Combining aerobic and anaerobic treatments can complement each other. Most of the biooxidizable substances in the sewage can be converted into methane in the anaerobic reactor to reduce energy consumption and sludge growth, while the remaining pollutants can be converted into biogas in the form of sludge in the aerobic reactor. substances and carbon dioxide (carbon dioxide). The combination of aerobic and anaerobic treatment is especially suitable on some large installations. However, such combinations are generally unattractive in small installations because the benefits often do not justify the increased investment, and because of the larger footprint required. Arranging the aerobic and anaerobic units perpendicular to each other, eg in the same tower, makes the combination of aerobic and anaerobic treatment also suitable for small units.

Chinese patent application CN2791027A discloses a gas-liquid-solid three-phase biological fluidized bed reactor for sewage treatment, wherein at least one riser is arranged in the axial direction in the reactor cylinder, and the outlet at the top of the riser extends into the device. In the guide tube in the cylinder body of the separation zone, a gas-liquid-solid separator is provided above the outlet at the top of the riser, and the reactor is provided with an air inlet pipe, and the outlet of the air inlet pipe extends into the riser pipe from the inlet at the bottom of the riser pipe. A water inlet is provided on the side wall of the fluidized zone cylinder.

International patent application WO96/23,735 discloses a kind of sewage biological treatment device, comprises as the first part of upflow type anaerobic sludge blanket (upflow anaerobic s1udge blanket, UASB) reactor (the first part comprises the mixing zone at the bottom, The gas collection area on the top for collecting methane bubbles and the anaerobic reaction area between the mixing area and the gas collection area), and the aerobic reactor installed above the upflow anaerobic sludge bed reactor the second part of .

U.S. Patent No. 6,063,273 improves the sewage biological treatment device disclosed in WO96/23,735 and introduces a third part as an anaerobic sludge buffer zone. The upper part of the buffer zone is limited by a partition with openings, and the lower part is defined by a gas collection device. By definition, the gas supply device for supplying air/oxygen in the aerobic reactor is installed above this buffer zone.

In the devices disclosed in the above documents, the oxygen-containing gas is introduced into the aerobic reactor through the gas supply device and mixed with the materials therein. Typical gas supply means include gas distributors such as aerators. However, due to space constraints, it is difficult for common gas supply devices to make full use of oxygen-containing gas in small sewage biological treatment devices. Therefore, there is still a need for improved sewage biological treatment devices to meet various needs in different situations.

Contents of the invention

In one aspect, the present invention provides a tower type sewage biological treatment device, comprising an aerobic reactor and a gas-liquid separator arranged above the aerobic reactor, wherein the upper part of the aerobic reactor is in fluid communication with the gas-liquid separator A gas redistributor is arranged at the outlet of the aerobic reactor so that the material in the aerobic reactor enters the gas-liquid separator through the gas redistributor.

According to some embodiments of the tower-type sewage biological treatment device of the present invention, wherein the gas-liquid separator includes a gas-liquid separation cylinder arranged around the gas redistributor, and the gas-liquid separation cylinder extends upward beyond the gas redistributor. The upper end of the distributor is to form a gas-liquid separation zone above the gas redistributor defined by the upper surface of the gas redistributor and the inner surface of the gas-liquid separation cylinder.

According to some embodiments of the tower-type sewage biological treatment device of the present invention, the outlet is located in the middle of the top plate of the aerobic reactor disposed between the aerobic reactor and the gas-liquid separator.

According to some embodiments of the tower-type sewage biological treatment device of the present invention, wherein the top plate of the aerobic reactor is a conical cover, the outlet is arranged at the conical top of the middle part of the conical cover, and on the conical cover The surface and the inner surface of the tower wall and the outer surface of the gas-liquid separation cylinder together define a liquid-solid separation zone, and there is a gap channel between the conical cover and the tower wall to allow the liquid-solid separation zone and the aerobic reactor. fluid communication.

According to some embodiments of the tower-type sewage biological treatment device of the present invention, wherein the lower end of the gas-liquid separation cylinder can extend downwards to form a conical slope, wherein there is a slit channel between the conical slope and the conical cover to allow The fluid communication between the gas-liquid separation zone and the liquid-solid separation zone.

According to some embodiments of the tower-type sewage biological treatment device of the present invention, wherein the conical slope is fixed on the conical cover through a support.

According to some embodiments of the tower-type sewage biological treatment device of the present invention, a baffle plate protruding inward from the tower wall is provided below the gap channel between the conical cover and the tower wall, and the height of the baffle plate is approximately equal to the The width of the slot channel is such that air bubbles in the aerobic reaction zone do not enter the slot channel.

According to some embodiments of the tower-type sewage biological treatment device of the present invention, wherein the top plate of the aerobic reactor is a bell jar, the outlet is arranged at the cone top of the middle part of the bell jar, and The surface and the inner surface of the tower wall and the outer surface of the gas-liquid separation cylinder together define a liquid-solid separation zone, and there is a gap channel between the bell jar and the tower wall to allow the liquid-solid separation zone and the aerobic reactor. fluid communication.

According to some embodiments of the tower-type sewage biological treatment device of the present invention, wherein the lower end of the gas-liquid separation cylinder can extend downwards to form a conical slope, wherein there is a gap passage between the conical slope and the bell jar to allow The fluid communication between the gas-liquid separation zone and the liquid-solid separation zone.

According to some embodiments of the tower-type sewage biological treatment device of the present invention, wherein the conical inclined surface is fixed on the bell-shaped housing through a support member.

According to some embodiments of the tower-type sewage biological treatment device of the present invention, a baffle protruding inward from the tower wall is provided below the gap channel between the bell jar and the tower wall, and the height of the baffle is approximately equal to the The width of the slot channel is such that air bubbles in the aerobic reaction zone do not enter the slot channel.

According to some embodiments of the tower-type sewage biological treatment device of the present invention, the gas redistributor is an aerator, preferably a spiral aerator. The gas redistributor is preferably any suitable aerator, such as a spiral aerator, a microporous aerator, a plate aerator, a cyclone aerator, a tube aerator, a jet aerator, etc. . It is preferred to use a fixed helical aerator, such as a fixed single helix aerator, a fixed double helix aerator or a fixed triple helix aerator or the like.

According to some embodiments of the tower-type sewage biological treatment device of the present invention, it also includes an upflow sludge bed reactor arranged below the aerobic reactor and an upflow sludge bed reactor arranged at the aerobic reactor to react with the upflow sludge bed. A partition with one or more openings between containers.

According to some embodiments of the tower type sewage biological treatment device of the present invention, wherein the opening has a one-way passage device, the one-way passage device allows the material of the upflow sludge bed reactor to enter the aerobic reactor through the opening And the material of the aerobic reactor is prevented from entering the upflow sludge bed reactor through the opening.

According to some embodiments of the tower type sewage biological treatment device of the present invention, wherein the one-way passage device can be any suitable device capable of allowing fluid to flow in one direction, preferably any suitable one-way valve, check valve or check valve. toward the cover. The one-way cover can be a single piece of thin plate whose shape, size and position match the opening and is rotatably connected with the partition so that it can close the opening in the first state to prevent the passage of fluid and allow the passage of fluid in the second state . The single-piece thin plate may be an elastic thin plate fixed on the opening edge of the partition, such as an elastic metal, plastic or rubber thin plate. When the opening is in the shape of a slit, the one-way cover can also be two elastic thin plates that are respectively fixed on both sides of the slit on the partition and rely on each other, such as elastic metal, plastic or rubber thin plates. When the pressure of the fluid below the partition is greater than the pressure of the fluid above, the two elastic thin plates are bent apart under the action of the pressure difference to form a slit channel that allows the fluid to pass through. When the pressure of the fluid below the partition is less than or equal to the pressure of the fluid above, the two elastic thin plates will lean against each other under the action of the pressure difference to close the slit of the partition and prevent the passage of fluid.

According to some embodiments of the tower-type sewage biological treatment device of the present invention, the one-way passage device is a one-way valve, a check valve or a one-way cover plate.

According to some embodiments of the tower-type sewage biological treatment device of the present invention, one or more gas distributors, preferably aerators, more preferably fixed spiral aerators, are arranged at the lower and/or middle part of the aerobic reactor to distribute an oxygen-containing gas such as air and/or oxygen in the aerobic reactor. The gas distributor is preferably any suitable aerator, such as a spiral aerator, a microporous aerator, a plate aerator, a cyclone aerator, a tube aerator, a jet aerator, and the like. It is preferred to use a fixed helical aerator, such as a fixed single helix aerator, a fixed double helix aerator or a fixed triple helix aerator or the like. The gas distributor can be arranged at any suitable position above the partition. Where said gas distributor allows liquid to enter from its lower end (eg fixed screw aerator), said gas distributor (eg fixed screw aerator) is disposed substantially directly above said one or more openings , so that the fluid and mixed liquid from the opening enters the gas distributor to mix with the gas. If permitted, the one-way passage means of the opening may also be located within the lower end of the gas distributor.

According to some embodiments of the tower-type sewage biological treatment device of the present invention, the upflow sludge bed reactor may be an upflow anaerobic sludge bed reactor, which works under anaerobic reaction conditions to generate methane gas. Under such circumstances, if necessary, a gas collecting device can be provided under the upper part of the partition of the upflow sludge bed reactor to collect and export methane gas (for example, the upflow type exhaust described in US6063273 oxygen sludge bed reactor and methane gas collection device).

According to some embodiments of the tower-type sewage biological treatment device of the present invention, the upflow sludge bed reactor may be a hydrolysis reactor, working under the condition that hydrolysis reaction is the main reaction. In this case, the amount of methane produced is negligibly small, so the methane gas collection device can be omitted.

According to some embodiments of the tower-type sewage biological treatment device of the present invention, a mixing tank is provided at the bottom of the upflow sludge bed reactor for mixing raw sewage water and sludge.

According to some embodiments of the tower type sewage biological treatment device of the present invention, a sludge collection tank is arranged at the bottom of the upflow sludge bed reactor.

According to some embodiments of the tower-type sewage biological treatment device of the present invention, an aerobic sludge collection tank protruding downward is provided on the edge of the partition, and the aerobic sludge collection tank is in fluid communication with the aerobic reactor.

According to some embodiments of the tower type sewage biological treatment device of the present invention, it also includes a pipeline allowing the material in the aerobic sludge collection tank to enter the upflow sludge bed reactor. Valves and pumps can be installed in this pipeline to control or regulate the flow of materials.

According to some embodiments of the tower-type sewage biological treatment device of the present invention, the aerobic sludge collection tank includes an annular tank arranged inside and/or outside the upflow sludge bed reactor. According to other embodiments of the tower-type sewage biological treatment device of the present invention, the aerobic sludge collection tank includes one or more bag-shaped tanks arranged inside and/or outside the upflow sludge bed reactor. For example, when the tower diameter is large, an annular groove or multiple bag-shaped grooves can be set to more effectively achieve the settlement of aerobic sludge; when the tower diameter is small, only one bag-shaped groove can be set to save equipment investment. When the annular groove or the bagged groove is arranged inside the upflow sludge bed reactor (in the tower), the annular groove or the bagged groove can be defined by the tower wall and the groove wall connected with the partition and the tower wall respectively so that Adjacent to the inside of the tower wall, the fluid communication between the annular groove or bagged groove and the aerobic reactor can be achieved by setting one or more at the corresponding position of the partition to allow the aerobic sludge in the aerobic reactor Settling by gravity into the opening of the aerobic sludge collection tank. When the annular groove or bagged groove is arranged on the outside of the upflow sludge bed reactor (outside the tower), the annular groove or bagged groove can be defined by the tower wall and the groove wall connected to the tower wall outside the tower wall so as to adhere to Hanging on the outside of the tower wall, the fluid communication between the annular groove or bagged groove and the aerobic reactor can be achieved by setting one or more at the corresponding position of the tower wall to allow the aerobic sludge in the aerobic reactor to Settling by gravity into the opening of the aerobic sludge collection tank is achieved.

According to some embodiments of the tower-type sewage biological treatment device of the present invention, wherein there is an aerobic sludge collection tank protruding downwards into the inside or outside (preferably inside) of the upflow sludge bed reactor at the edge of the partition, the good An oxygen sludge holding tank is in fluid communication with the aerobic reactor and is fluidly isolated from the upflow sludge bed reactor.

Setting the aerobic sludge tank inside or outside (preferably inside) the upflow sludge bed reactor under the partition not only simplifies the equipment structure, reduces equipment investment and land occupation, but also increases the concentration of aerobic sludge and sinking effects. In such an aerobic sludge tank, the oxygen-containing gas in the aerobic sludge is precipitated and returned to the aerobic reactor during the sedimentation process, which not only makes full use of the oxygen-containing gas, but also makes the aerobic sludge in the aerobic sludge tank The sludge is substantially free of dissolved oxygen and does not interfere with the anaerobic and/or hydrolysis reactions in the upflow sludge bed reactor when the aerobic sludge is introduced.

According to some embodiments of the tower-type sewage biological treatment device of the present invention, wherein in the case where the upper part of the aerobic reactor is defined by a bell jar and there is a gas distributor such as an aerator, especially a fixed spiral aerator, The lower edge of the bell jar is lower than the material outlet of the gas distributor to ensure that the bubbles of aerobic gas will not enter the gap channel. In some cases, the lower edge of the bell jar may be a straight edge or a tapered edge extending outward and downward, so as to further ensure that air bubbles do not enter the gap channel.

According to some embodiments of the tower-type sewage biological treatment device of the present invention, a gas redistributor is arranged on the upper part of the aerobic reactor, and when the small air bubbles leaving the gas distributor gradually condense into larger When there are bubbles, the gas redistributor can disperse these large bubbles into small bubbles again, thereby more fully utilizing the oxygen in the bubbles and improving the efficiency of the aerobic reactor. The gas redistributor can be any suitable gas-liquid mixer, preferably a fixed helical aerator, such as a fixed single helix aerator, a fixed double helix aerator or a fixed triple helix aerator. Such an aerobic reactor has the advantages of simple structure, convenient and reliable operation, and easy maintenance.

According to some embodiments of the tower-type sewage biological treatment device of the present invention, the gas redistributor is arranged at the opening at the top of the bell jar so that part of the aerobically treated material enters the gas redistributor. The gas redistributor can be any suitable gas-liquid mixer, preferably a fixed helical aerator, such as a fixed single helix aerator, a fixed double helix aerator or a fixed triple helix aerator. The gas redistributor set up in this way not only improves the utilization rate of the oxygen-containing gas and the efficiency of the aerobic reaction, but also plays the role of buffering and dissipating energy. Because the kinetic energy of the material is reduced when the material passes through the gas redistributor and the large bubbles in it are dispersed into small bubbles again, the bubbles in the material leaving the gas redistributor can escape the liquid surface gently and smoothly, which is conducive to the separation and discharge of gas. In some cases, the gas that escapes smoothly from the liquid surface can be discharged directly without the need for a buffer gas chamber, thereby saving investment, operation and maintenance costs.

According to some embodiments of the tower-type sewage biological treatment device of the present invention, wherein a separator is arranged on the upper part of the aerobic reactor, the separator can be any suitable separator, preferably a gas-liquid-solid three-phase separator , so that the gas and purified water in the material after aerobic treatment are separated and discharged, and the aerobic sludge is returned to the aerobic processor.

According to some embodiments of the tower-type sewage biological treatment device of the present invention, the lower part of the three-phase separator is reconstituted by the conical or bell and the gas provided at the top opening of the conical or bell. The outer surface of the distributor is defined, and a gas-liquid separation cylinder is arranged around the gas redistributor, and the gas-liquid separation cylinder extends upward beyond the upper end of the gas redistributor to form a gas redistributor above the gas redistributor. The gas-liquid separation zone defined by the upper surface of the distributor and the inner surface of the gas-liquid separation cylinder, and the outer surface of the cone or bell, the outer surface of the gas-liquid separation cylinder and the inner surface of the tower wall define the liquid-solid separation zone, wherein the liquid-solid separation zone is in fluid communication with the gas-liquid separation zone through the gap channel between the gas redistributor and the gas-liquid separation cylinder and through the gap between the cone or bell and the tower wall The slot channel is in fluid communication with the aerobic reactor. After aerobic treatment, the material leaves the gas redistributor and enters the gas-liquid separation zone, so that the air bubbles in the material escape from the liquid surface and then are discharged. The material after gas removal enters the liquid-solid separation zone through the gap channel between the gas-liquid separation cylinder and the gas redistributor. In the liquid-solid separation zone, the aerobic sludge deposited as a solid settles and concentrates and passes through the liquid-solid separation process. The gap channel between the conical or bell jar and the tower wall in the lower part of the zone returns to the aerobic reactor, while the purified water as supernatant is discharged from the upper part of the liquid-solid separation zone.

According to some embodiments of the tower-type sewage biological treatment device of the present invention, the lower end of the gas-liquid separation cylinder can extend downwards to form a conical inclined plane (or an umbrella-shaped inclined plane), wherein the conical inclined plane and the conical cover or bell-shaped There are slit passages between the covers to make fluid communication between the gas-liquid separation area and the liquid-solid separation area. The conical slope may be parallel or non-parallel to the upper surface of the cone or bell. The included angle between the tapered slope and the tower wall is any suitable angle less than 90 degrees. The distance between the outer edge of the tapered slope and the tower wall can be greater than, equal to or smaller than the distance between the cone or bell and the tower wall. Such a conical slope can make the bottom material in the liquid-solid separation zone be in a flow state that is conducive to sludge collision, adsorption and agglomeration, thereby promoting the settlement of aerobic sludge.

According to some embodiments of the tower-type sewage biological treatment device of the present invention, inclined plates or inclined pipes are also provided in the liquid-solid separation zone to enhance the separation efficiency of muddy water and improve the quality of effluent water.

The tower-type sewage biological treatment device of the present invention has the advantages of good effluent quality, high volume load, space saving, low sludge output, and little impact on the surrounding environment. The device of the invention can improve the utilization rate of the oxygen-containing gas and the efficiency of the aerobic reaction, improve the separation and discharge of the gas, and save investment, operation and maintenance costs.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of a tower-type sewage biological treatment device according to the present invention, wherein the upper part of the aerobic reactor is defined by a bell jar.

Fig. 2 is a structural schematic diagram of another embodiment of the tower-type sewage biological treatment device of the present invention, wherein the upper part of the aerobic reactor is defined by a conical cover.

Detailed ways

Some embodiments of the present invention will be further introduced below in conjunction with the accompanying drawings, but it is not intended to limit the protection scope of the present invention.

Accompanying drawing 1 is the structural representation of an embodiment of tower type sewage biological treatment device of the present invention, wherein said tower type sewage biological treatment device comprises upflow type sludge bed reactor (101), aerobic reactor (102) , a separator (103) and a partition (30) between the upflow sludge bed reactor (101) and the aerobic reactor (102). These units are all arranged within a single cylindrical tower (20) (for example a 10-30 meter high tower).

The lower part of the tower (20) is an upflow sludge bed reactor (101), the bottom of which is provided with a sludge collection tank (28) and a mixing tank (29), and the sludge in the sludge collection tank (28) can pass through The sludge pump (27) is sent into the mixing tank (29) to mix with the raw sewage water from the sewage feed pipe (1), or discharged through the sludge discharge pipe (26). The mixed sewage raw water and return sludge are subjected to anaerobic reaction and/or hydrolysis reaction in the reaction zone (2) of the upflow sludge bed reactor (101). Controlling the flow rate of the sludge and sewage raw water sent to the mixing tank (29) can form an upward laminar flow in the upflow sludge bed reactor, and the sludge therein is stably suspended in the upflow in the balance of flow and settlement. A sludge bed layer is formed in the type sludge bed reactor, and the clear liquid that passes through the sludge bed layer and continues to flow upwards enters the aerobic reactor (102) through the opening (23) with a one-way passage device on the partition (30). . Optionally, a gas collection device (such as the gas collection hood described in US6,063,273) (not shown) may be provided under the partition (30) to collect gases such as methane produced by the anaerobic reaction. An opening (23) with a one-way pass allows material from the upflow sludge bed reactor (101) to enter the aerobic reactor (102) and prevents material from the aerobic reactor (102) from entering the upflow sludge bed Reactor (101).

In the middle of the column is the aerobic reactor (102), the bottom of which is defined by a partition (30) and the upper part is defined by a bell (8) with tapered sides (22). There is a baffle (6) protruding inward from the tower wall below the gap passage (7) between the bell jar (8) and the tower wall, and the height of the baffle (6) is approximately equal to or slightly greater than the gap passage (7). ) to avoid the air bubbles in the aerobic reaction zone (21) from entering the gap channel (7). The fixed spiral aerator (5) is arranged above the partition (30), preferably facing the opening (23). The upper end of the fixed spiral aerator (5) is preferably higher than the tapered edge (22) of the lower edge of the bell jar (8). The gas supply pipe (4) sends oxygen-containing gas such as air or oxygen into the fixed screw aerator (5). Oxygen-containing gas and the material in the aerobic reactor and the material from the opening (23) are mixed and dispersed in the fixed screw aerator (6) to form small bubbles, and then enter the aerobic reaction zone (21) for aerobic reaction or aerobic reaction. Oxygen treatment. The material after aerobic treatment enters the fixed spiral aerator (18), so that the large air bubbles therein are redispersed into small air bubbles to fully utilize the oxygen therein and reduce the kinetic energy carried.

An aerobic sludge collection tank (3) protruding downward into the interior of the upflow sludge bed reactor (101) is provided on the edge of the partition (30), and the aerobic sludge collection tank (3) reacts with the aerobic The reactor (102) is in fluid communication with and is fluidly isolated from the upflow sludge bed reactor (101). A conical chamfer (24) with an opening can be provided at the channel where the aerobic sludge tank (3) is in fluid communication with the aerobic reactor (102). The aerobic sludge in the aerobic sludge tank (3) can enter the mixing tank (29) through the sludge pipe (25) and the sludge pump (27), or be discharged through the sludge discharge pipe (26).

The upper part of the column (20) is a separator (103). The material from the aerobic reactor enters the gas separation zone (13) after passing through the spiral aerator (18). Because the large air bubbles in the material are dispersed into small air bubbles and the kinetic energy carried is greatly reduced by the spiral aerator (18), the air bubbles smoothly escape from the liquid surface in the gas separation area (13) to the gas collection area (14), and then It can be discharged through the exhaust pipe (15).

The material after degassing passes downward through the gap channel (10) between the gas-liquid separation cylinder (11) and the spiral aerator (18) and the gap channel between the conical slope (9) and the bell jar (8) (19) Enter the liquid-solid separation zone (12), in the liquid-solid separation zone (12), pass through the bell jar (8) below the liquid-solid separation zone (12) and tower The gap channel (7) between the walls returns to the aerobic reaction zone (21) of the aerobic reactor (102), and at the same time, the purified water as supernatant enters the water collection zone (16) on the upper part of the liquid-solid separation zone (12) , and discharged through the drain pipe (17).

Accompanying drawing 2 is the structure diagram of another embodiment of the tower-type sewage biological treatment device of the present invention, wherein the upper part of the aerobic reactor (102) is defined by a conical cover (8). There is a baffle (6) protruding inward from the tower wall below the gap passage (7) between the conical cover (8) and the tower wall, and the height of the baffle (6) is about equal to or slightly greater than the gap passage (7). ) to avoid the air bubbles in the aerobic reaction zone (21) from entering the gap channel (7).

The present invention has been described above by way of illustration. However, it should be understood that the present invention is by no means limited to these specific embodiments. Those skilled in the art can make various modifications or changes to the present invention, and these modifications and changes all belong to the protection scope of the present invention.

Claims (70)

1. A tower type sewage biological treatment device, comprising an aerobic reactor and a gas-liquid separator arranged above the aerobic reactor, wherein the outlet of the upper part of the aerobic reactor fluidly connected with the gas-liquid separator is provided with The gas redistributor allows the material in the aerobic reactor to enter the gas-liquid separator through the gas redistributor; the gas redistributor is a gas-liquid mixer. 2. The tower type sewage biological treatment device according to claim 1, wherein said gas-liquid separator comprises a gas-liquid separation cylinder arranged around said gas redistributor, said gas-liquid separation cylinder extending upward beyond said gas redistribution The upper end of the gas redistributor is used to form a gas-liquid separation zone above the gas redistributor defined by the upper surface of the gas redistributor and the inner surface of the gas-liquid separation cylinder. 3. The tower-type sewage biological treatment device according to claim 2, wherein the outlet is located in the middle of the top plate of the aerobic reactor disposed between the aerobic reactor and the gas-liquid separator. 4. The tower type sewage biological treatment device according to claim 3, wherein the top plate of the aerobic reactor is a conical hood, the outlet is arranged at the conical top in the middle of the conical hood, and the upper surface of the conical hood is The liquid-solid separation zone is defined together with the inner surface of the tower wall and the outer surface of the gas-liquid separation cylinder, and there is a gap channel between the conical cover and the tower wall to allow fluid flow between the liquid-solid separation zone and the aerobic reactor. connected. 5. The tower-type sewage biological treatment device according to claim 4, wherein the lower end of the gas-liquid separation cylinder extends downwards to form a conical slope, wherein there is a gap passage between the conical slope and the conical cover to allow gas-liquid Fluid communication between the separation zone and the liquid-solid separation zone. 6. The tower-type sewage biological treatment device according to claim 5, wherein the conical slope is fixed on the conical cover by a support. 7. The tower-type sewage biological treatment device according to any one of claims 4-6, wherein a baffle protruding inward from the tower wall is provided below the gap channel between the conical cover and the tower wall, and the baffle The height is approximately equal to or slightly greater than the width of the slit channel to prevent air bubbles in the aerobic reaction zone from entering the slit channel. 8. The tower type sewage biological treatment device according to claim 3, wherein the top plate of the aerobic reactor is a bell jar, the outlet is arranged at the cone top of the middle part of the bell jar, and the upper surface of the bell jar is The liquid-solid separation zone is defined together with the inner surface of the tower wall and the outer surface of the gas-liquid separation cylinder, and there is a gap channel between the bell jar and the tower wall to allow fluid flow between the liquid-solid separation zone and the aerobic reactor. connected. 9. The tower type sewage biological treatment device according to claim 8, wherein the lower end of the gas-liquid separation cylinder extends downwards to form a conical slope, wherein there is a gap passage between the conical slope and the bell jar to allow the gas-liquid Fluid communication between the separation zone and the liquid-solid separation zone. 10. The tower-type sewage biological treatment device according to claim 9, wherein the conical slope is fixed on the bell-shaped housing through a support. 11. The tower-type sewage biological treatment device according to any one of claims 8-10, wherein a baffle protruding inwardly from the tower wall is provided below the gap passage between the bell jar and the tower wall, and the baffle plate The height is approximately equal to or slightly greater than the width of the slit channel to prevent air bubbles in the aerobic reaction zone from entering the slit channel. 12. The tower-type sewage biological treatment plant according to any one of claims 1-6 or 8-10, wherein the gas redistributor is an aerator. 13. The tower type sewage biological treatment device according to claim 7, wherein said gas redistributor is an aerator. 14. The tower type sewage biological treatment plant according to claim 11, wherein said gas redistributor is an aerator. 15. The tower-type sewage biological treatment device according to any one of claims 1-6 or 8-10, wherein the gas redistributor is a spiral aerator. 16. The tower type sewage biological treatment device according to claim 7, wherein said gas redistributor is a spiral aerator. 17. The tower type sewage biological treatment device according to claim 11, wherein said gas redistributor is a spiral aerator. 18. The tower type sewage biological treatment device according to any one of claims 1-6, 8-10, 13, 14, 16 or 17, wherein the lower and/or middle part of the aerobic reactor is provided with one or A plurality of gas distributors, the gas distributors are aerators. 19. The tower-type sewage biological treatment device according to claim 7, wherein one or more gas distributors are arranged at the lower and/or middle part of the aerobic reactor, and the gas distributors are aerators. 20. The tower-type sewage biological treatment device according to claim 11, wherein one or more gas distributors are arranged at the lower and/or middle part of the aerobic reactor, and the gas distributors are aerators. 21. The tower-type sewage biological treatment device according to claim 12, wherein one or more gas distributors are arranged at the lower and/or middle part of the aerobic reactor, and the gas distributors are aerators. 22. The tower-type sewage biological treatment device according to claim 15, wherein one or more gas distributors are arranged at the lower and/or middle part of the aerobic reactor, and the gas distributors are aerators. 23. The tower type sewage biological treatment device according to any one of claims 1-6, 8-10, 13, 14, 16 or 17, wherein one or A plurality of gas distributors, the gas distributors are fixed spiral aerators. 24. The tower-type sewage biological treatment device according to claim 7, wherein one or more gas distributors are arranged at the lower and/or middle part of the aerobic reactor, and the gas distributors are fixed spiral aerators. 25. The tower-type sewage biological treatment device according to claim 11, wherein one or more gas distributors are arranged at the lower and/or middle part of the aerobic reactor, and the gas distributors are fixed spiral aerators. 26. The tower-type sewage biological treatment device according to claim 12, wherein one or more gas distributors are arranged at the lower part and/or the middle part of the aerobic reactor, and the gas distributors are fixed spiral aerators. 27. The tower-type sewage biological treatment device according to claim 15, wherein one or more gas distributors are arranged at the lower and/or middle part of the aerobic reactor, and the gas distributors are fixed spiral aerators. 28. The tower type sewage biological treatment device according to any one of claims 1-6, 8-10, 13, 14, 16, 17, 19-22 or 24-27, further comprising The lower upflow sludge bed reactor and the partition plate with one or more openings arranged between the aerobic reactor and the upflow sludge bed reactor. 29. The tower type sewage biological treatment device according to claim 7, further comprising an upflow sludge bed reactor arranged below the aerobic reactor and an upflow sludge bed reactor arranged between the aerobic reactor and the upflow sludge bed reactor A partition with one or more openings in between. 30. The tower type sewage biological treatment device according to claim 11, further comprising an upflow sludge bed reactor arranged below the aerobic reactor and an upflow sludge bed reactor arranged between the aerobic reactor and the upflow sludge bed reactor A partition with one or more openings in between. 31. The tower type sewage biological treatment device according to claim 12, further comprising an upflow sludge bed reactor arranged below the aerobic reactor and an upflow sludge bed reactor arranged between the aerobic reactor and the upflow sludge bed reactor A partition with one or more openings in between. 32. The tower type sewage biological treatment device according to claim 15, further comprising an upflow sludge bed reactor arranged below the aerobic reactor and an upflow sludge bed reactor arranged between the aerobic reactor and the upflow sludge bed reactor A partition with one or more openings in between. 33. The tower type sewage biological treatment device according to claim 18, further comprising an upflow sludge bed reactor arranged below the aerobic reactor and an upflow sludge bed reactor arranged between the aerobic reactor and the upflow sludge bed reactor A partition with one or more openings in between. 34. The tower type sewage biological treatment device according to claim 23, further comprising an upflow sludge bed reactor arranged below the aerobic reactor and an upflow sludge bed reactor arranged between the aerobic reactor and the upflow sludge bed reactor A partition with one or more openings in between. 35. The tower type sewage biological treatment device according to claim 28, wherein said opening has a one-way passage device, which allows the material of the upflow sludge bed reactor to enter the aerobic reactor through the opening and The feed of the aerobic reactor is prevented from entering the upflow sludge bed reactor through the opening. 36. The tower-type sewage biological treatment plant according to any one of claims 29-34, wherein said opening has a one-way passage device, which allows the material of the upflow sludge bed reactor to pass through said opening The feed to the aerobic reactor and is prevented from entering the upflow sludge bed reactor through the opening. 37. The tower-type sewage biological treatment device according to claim 35, wherein the one-way passage device is a one-way valve or a one-way cover plate. 38. The tower-type sewage biological treatment device according to claim 36, wherein the one-way passage device is a one-way valve or a one-way cover plate. 39. The tower type sewage biological treatment plant according to claim 28, wherein said upflow sludge bed reactor is an upflow anaerobic sludge bed reactor. 40. The tower type sewage biological treatment plant according to any one of claims 29-35, 37 or 38, wherein the upflow sludge bed reactor is an upflow anaerobic sludge bed reactor. 41. The tower type sewage biological treatment plant according to claim 36, wherein said upflow sludge bed reactor is an upflow anaerobic sludge bed reactor. 42. The tower type sewage biological treatment plant according to claim 28, wherein said upflow sludge bed reactor is a hydrolysis reactor. 43. A tower-type sewage biological treatment plant according to any one of claims 29-35, 37 or 38, wherein said upflow sludge bed reactor is a hydrolysis reactor. 44. The tower type sewage biological treatment plant according to claim 36, wherein said upflow sludge bed reactor is a hydrolysis reactor. 45. The tower type sewage biological treatment device according to claim 28, wherein a mixing tank is provided at the bottom of the upflow sludge bed reactor for mixing raw sewage water and sludge. 46. The tower type sewage biological treatment device according to any one of claims 29-35, 37-39, 41, 42 or 44, wherein a mixing tank is provided at the bottom of the upflow sludge bed reactor for mixing sewage raw water and sludge. 47. The tower type sewage biological treatment device according to claim 36, wherein a mixing tank is provided at the bottom of the upflow sludge bed reactor for mixing raw sewage water and sludge. 48. The tower type sewage biological treatment device according to claim 40, wherein a mixing tank is provided at the bottom of the upflow sludge bed reactor for mixing raw sewage water and sludge. 49. The tower type sewage biological treatment device according to claim 43, wherein a mixing tank is provided at the bottom of the upflow sludge bed reactor for mixing raw sewage water and sludge. 50. The tower type sewage biological treatment device according to claim 28, wherein a sludge collection tank is provided at the bottom of the upflow sludge bed reactor. 51. The tower type sewage biological treatment device according to any one of claims 29-35, 37-39, 41, 42, 44, 45 or 47-49, wherein the bottom of the upflow sludge bed reactor is provided with Sludge collection tank. 52. The tower type sewage biological treatment device according to claim 36, wherein a sludge collection tank is provided at the bottom of the upflow sludge bed reactor. 53. The tower type sewage biological treatment device according to claim 40, wherein a sludge collection tank is provided at the bottom of the upflow sludge bed reactor. 54. The tower type sewage biological treatment device according to claim 43, wherein a sludge collection tank is provided at the bottom of the upflow sludge bed reactor. 55. The tower type sewage biological treatment device according to claim 46, wherein a sludge collection tank is provided at the bottom of the upflow sludge bed reactor. 56. The tower-type sewage biological treatment device according to claim 28, wherein an aerobic sludge collection tank protruding downward is provided on the edge of the partition, and the aerobic sludge collection tank is in fluid communication with the aerobic reactor. 57. The tower type sewage biological treatment device according to any one of claims 29-35, 37-39, 41, 42, 44, 45, 47-50 or 52-55, wherein a downward A protruding aerobic sludge collection tank in fluid communication with the aerobic reactor. 58. The tower-type sewage biological treatment device according to claim 36, wherein an aerobic sludge collection tank protruding downward is provided on the edge of the partition, and the aerobic sludge collection tank is in fluid communication with the aerobic reactor. 59. The tower-type sewage biological treatment device according to claim 40, wherein an aerobic sludge collection tank protruding downward is provided on the edge of the partition, and the aerobic sludge collection tank is in fluid communication with the aerobic reactor. 60. The tower-type sewage biological treatment device according to claim 43, wherein an aerobic sludge collection tank protruding downward is provided on the edge of the partition, and the aerobic sludge collection tank is in fluid communication with the aerobic reactor. 61. The tower-type sewage biological treatment device according to claim 46, wherein an aerobic sludge collection tank protruding downward is provided on the edge of the partition, and the aerobic sludge collection tank is in fluid communication with the aerobic reactor. 62. The tower-type sewage biological treatment device according to claim 51, wherein an aerobic sludge collection tank protruding downward is provided on the edge of the partition, and the aerobic sludge collection tank is in fluid communication with the aerobic reactor. 63. The tower type sewage biological treatment device according to any one of claims 56 or 58-62, wherein the aerobic sludge collection tank comprises an annular tank arranged inside and/or outside the upflow sludge bed reactor . 64. The tower type sewage biological treatment device according to claim 57, wherein the aerobic sludge collection tank comprises an annular tank arranged inside and/or outside the upflow sludge bed reactor. 65. The tower type sewage biological treatment device according to any one of claims 56 or 58-62, wherein said aerobic sludge collection tank comprises one or more sludge bed reactors arranged inside and/or External pocket slot. 66. The tower type sewage biological treatment device according to claim 57, wherein said aerobic sludge collection tank comprises one or more bag-shaped tanks arranged inside and/or outside the upflow sludge bed reactor. 67. The tower type sewage biological treatment device according to any one of claims 56, 58-62, 64 or 66, further comprising a pipeline allowing the material in the aerobic sludge collection tank to enter the upflow sludge bed reactor . 68. The tower type sewage biological treatment device according to claim 57, further comprising a pipeline allowing the material in the aerobic sludge collection tank to enter the upflow sludge bed reactor. 69. The tower type sewage biological treatment device according to claim 63, further comprising a pipeline allowing the material in the aerobic sludge collection tank to enter the upflow sludge bed reactor. 70. The tower type sewage biological treatment device according to claim 65, further comprising a pipeline allowing the material in the aerobic sludge collection tank to enter the upflow sludge bed reactor.