Sewage treatment equipment

Abstract

The utility model provides sewage treatment equipment which comprises a water conduit, an anoxic tank, an aerobic tank, an annular water inlet pipe, a water outlet pipe, a water drainage pipe, a jet device, fluidizing filler and a gas pipe, and the water drainage pipe points to the axial lead of the aerobic tank; according to the utility model, the jet device is arranged, and when water enters the jet device, the water outlet of the jet device can spray out powerful water-air mixed liquid, so that not only is a large number of tiny bubbles generated to be supplied to microorganisms for dissolved oxygen, but also sewage can be pushed to flow, so that the sewage continuously flows towards one direction; therefore, dissolved oxygen required by microorganisms is provided by water-gas mixed liquid generated by the jet device, an air blower can be omitted, energy consumption is saved, an aeration disc does not need to be fixedly mounted at the bottom of the aerobic tank, and maintenance is simple and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to sewage treatment equipment. Background Art

[0002] The biological treatment process of sewage is a special one among sewage treatment processes, also known as the activated sludge process. The activated sludge process can be divided into aerobic process and anaerobic process. In the aerobic biological sewage treatment system, microorganisms use the dissolved oxygen in the water to oxidize and degrade the organic pollutants in the water, and then separate the microorganisms and water to achieve the purpose of purifying sewage. The AO process is also called the anaerobic aerobic process. A (Anacrobic) is the anaerobic section, which is used for nitrogen and phosphorus removal; O (Oxic) is the aerobic section, which is used to remove organic matter in the water; the characteristics of the AO denitrification process: denitrification in the front, nitrification in the back, with internal circulation, using the organic substrate in the original sewage as the carbon source, the effect is good, and the denitrification reaction is sufficient; the aeration tank is in the back, so that the denitrification residue can be further removed, and the water quality of the treated water is improved; the stirring in the A section only makes the sludge suspended, and avoids the increase of DO (dissolved oxygen). The front section of the O section uses strong aeration, and the back section reduces the gas volume, so that the DO content of the internal circulation liquid is reduced to ensure the anoxic state of the A section. When the existing sewage treatment device adopts the AO process, in the aerobic section, it generally only uses the form of an aeration plate to aerate the sewage to provide dissolved oxygen for microorganisms; but the aeration of the aerobic section requires a blower to provide compressed air, which consumes a lot of energy. In addition, the aeration plate is fixedly installed at the bottom of the aerobic tank, which is very difficult and troublesome to repair. Utility Model Content

[0003] The purpose of the utility model is to design a sewage treatment equipment to solve the problems raised by the background technology. To achieve the above purpose, the utility model provides the following technical solutions: including an aerobic pool connected to an anoxic pool through a water diversion pipe, an annular water inlet pipe installed on the top of the aerobic pool, a plurality of water outlet pipes connected to the annular water inlet pipe, a plurality of drainage pipes connected to the water outlet pipe and an ejector connected to the drainage pipe, the interior of the aerobic pool is filled with fluidized filler, the bottom of the water diversion pipe is located at the lower part of the aerobic pool, a plurality of the water outlet pipes are circumferentially distributed in the aerobic pool, the air intake in the ejector is connected to the atmosphere through an air pipe, the water inlet of the ejector is connected to the drainage pipe, the water outlet of the ejector is arranged obliquely upward, and the water outlet pipe points to the axis of the aerobic pool.

[0004] Furthermore, the anoxic pool and the aerobic pool are cylindrical, the anoxic pool is located inside the aerobic pool, and the anoxic pool is connected to a siphon-type pulse water distributor.

[0005] Furthermore, a conical plate is provided at the bottom of the water distribution pipe in the siphon-type pulse water distributor, and a water outlet gap is provided between the conical plate and the water distribution pipe.

[0006] Furthermore, the middle part of the anoxic pool is filled with fixed filler through the installation chamber.

[0007] Furthermore, a water outlet trough is provided on the upper part of the aerobic pool, the water outlet trough is connected to the circulating water pool, the top of the circulating water pool is connected to the secondary sedimentation tank, and the top of the secondary sedimentation tank is connected to the clean water tank.

[0008] Furthermore, the bottom of the circulating water pool is connected to the annular water inlet pipe through a circulating water pump.

[0009] Furthermore, one side of the water outlet trough is communicated with the top of the aerobic pool, and the other side of the water outlet trough is provided with a slot, and an interception net is embedded in the slot.

[0010] Furthermore, the circulating water pool is connected to the middle and lower parts of the secondary sedimentation tank through a central pipe, and the top of the central pipe is connected to the atmosphere.

[0011] Furthermore, a sludge discharge pipe is connected to the bottom of the secondary sedimentation tank, and the sludge discharge pipe is connected to a siphon pulse water distributor through a sludge return pump.

[0012] Furthermore, a return pipe connected to the mud discharge pipe is provided at the lower part of the circulating water pool, and valves are provided on both the return pipe and the mud discharge pipe.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model is provided with an ejector. When water enters the ejector, a powerful water-gas mixture can be ejected from the water outlet of the ejector, which not only generates a large number of tiny bubbles to supply dissolved oxygen to microorganisms, but also can push the sewage to make the sewage flow continuously in one direction, thereby making the sewage circulate continuously in the aerobic pool, and cooperate with the fluidized filler in the water to greatly increase the concentration of microorganisms in the sewage, so that the microorganisms and the sewage are fully mixed, which can improve the sewage treatment efficiency; at the same time, the water-gas mixture generated by the ejector provides the dissolved oxygen required by the microorganisms, which can save the blower, save energy consumption, and does not need to be fixedly installed on the bottom of the aerobic pool, and the maintenance is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a top view schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a partial explosion and cross-sectional schematic diagram of the utility model;

[0018] Figure 3 It is a cross-sectional schematic diagram of the water outlet trough of the utility model.

[0019] Among them: 1. Annular water inlet pipe; 2. Siphon pulse water distributor; 3. Aerobic tank; 4. Anoxic tank; 5. Water outlet pipe; 6. Ejector; 7. Clear water tank; 8. Secondary sedimentation tank; 9. Sludge return pump; 10. Circulating water pump; 11. Circulating water tank; 12. Water outlet trough; 13. Interception net; 14. Water distribution pipe. DETAILED DESCRIPTION

[0020] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0021] Example: Please refer to Figure 1-3A sewage treatment equipment comprises an aerobic pool 3 connected with an anoxic pool 4 through a water diversion pipe, an annular water inlet pipe 1 installed on the top of the aerobic pool 3, a plurality of water outlet pipes 5 connected with the annular water inlet pipe 1, a plurality of drainage pipes connected with the water outlet pipe 5 and an ejector 6 connected with the drainage pipe, the bottom of the water diversion pipe is located at the lower part of the aerobic pool 3, the plurality of water outlet pipes 5 are circumferentially distributed in the aerobic pool 3, the air intake in the ejector 6 is connected with the atmosphere through an air pipe, the water inlet of the ejector 6 is connected with the drainage pipe, the water outlet of the ejector 6 is arranged obliquely upward, and the water outlet pipe 5 points to the axis of the aerobic pool 3; wherein the aerobic pool 3 is filled with fluidized filler; and the ejectors 6 are evenly arranged in the aerobic pool 3. At the bottom, an ejector 6 is installed so that the water outlet direction is inclined upward by 45 degrees, and the ejector 6 adopts a conventional ejector 6, which will not be described in detail here. When water enters the ejector 6, the water outlet of the ejector 6 can spray out a strong water-gas mixture, which not only produces a large number of tiny bubbles to supply dissolved oxygen to microorganisms, but also can push the sewage to make the sewage flow continuously in the aerobic tank 3. With the fluidized filler in the water, the concentration of microorganisms in the sewage is greatly increased, and the microorganisms and sewage are fully mixed, which can improve the sewage treatment efficiency. In addition, there is no obstruction above the ejector 6, so it can be lifted for maintenance; the problem that the aerator of the traditional aerobic tank 3 is fixed at the bottom of the pool and is difficult to maintain is solved. The anoxic pool 4 and the aerobic pool 3 are cylindrical, the anoxic pool 4 is located inside the aerobic pool 3, and the anoxic pool 4 is connected to the siphon pulse water distributor 2; and the end of the trachea can be installed with a regulating valve for adjusting the cross-sectional opening of the trachea, and the size of the suction volume can be adjusted to adjust the dissolved oxygen concentration required by the aerobic pool 3, which is simple to operate and convenient to maintain. In addition, the combination of the ejector 6 and the trachea can save equipment such as blowers, and the equipment cost is lower, more energy-saving, and lower operating costs; the anoxic pool 4 and the aerobic pool 3 in this embodiment are both cylindrical, and compared with the traditional rectangular integrated equipment, the circular equipment occupies less space The area is smaller, and the pool has no dead corners, the pool space utilization rate is higher, and the treatment efficiency is also higher; among them, the siphon type pulse water distributor adopts the existing siphon type pulse water distributor, which will not be described in detail here, and the bottom of the water distribution pipe 14 in the siphon type pulse water distributor is provided with a conical plate, and a water outlet gap is provided between the conical plate and the water distribution pipe 14. After the sewage from the water distribution pipe 14 comes out, it will impact on the conical plate, and then spread around, evenly flowing into the anoxic pool 4, while impacting and stirring the sewage inside the anoxic pool 4; thereby reducing the use of the stirring mechanism, which is beneficial to cost saving.

[0022] In this embodiment, the aerobic tank 3 is a loop, and sewage and sludge can be continuously circulated in the loop, which is conducive to the proliferation of nitrifying bacteria with a long generation time, and by adding fluidized bed fillers in the tank, the concentration of microorganisms in the sewage can be increased, and the purification efficiency of pollutants in the sewage can be improved; the upper part of the anoxic tank 4 is filled with fixed fillers through the installation chamber, so that the microorganisms in the sewage are attached to the fillers, increasing the concentration of microorganisms in the sewage, which can improve the load impact capacity of the equipment and make the load impact resistance of the sewage treatment system stronger; the lower part of the anoxic tank 4 is an inverted cone, which is convenient for the accumulation of sludge. and extraction; and the upper part of the aerobic pool 3 is provided with a water outlet trough 12, the water outlet trough 12 is connected to the circulating water pool 11, the top of the circulating water pool 11 is connected to the secondary sedimentation tank 8, the top of the secondary sedimentation tank 8 is connected to the clean water pool 7, and the bottom of the circulating water pool 11 is connected to the annular water inlet pipe 1 through the circulating water pump 10, one side of the water outlet trough 12 is connected to the top of the aerobic pool 3, and the other side of the water outlet trough 12 is provided with a slot, and an interception net 13 is embedded in the slot. The aerobic pool 3 is discharged into the circulating water pool 11 through the water outlet trough 12. In this process, the interception net 13 intercepts the fluidized filler and passes the circulating water pump 10 to the circulating water. The water in the water pool 11 is pumped into the annular water inlet pipe 1, thereby forming a water circulation between the aerobic pool 3 and the circulating water pool 11, saving costs; the circulating water pool 11 is connected to the middle and lower part of the secondary sedimentation tank 8 through a central pipe, the top of the central pipe is connected to the atmosphere, the bottom of the secondary sedimentation tank 8 is an inverted cone, and a conical plate is provided at the bottom of the central pipe. A water outlet gap is provided between the conical plate and the central pipe, which facilitates the water in the circulating water pool 11 to flow into the secondary sedimentation tank 8 and settle in the secondary sedimentation tank 8; the bottom of the secondary sedimentation tank 8 is connected to a sludge discharge pipe, which is connected to the siphon pulse water distributor 2 through a sludge return pump 9, and the circulation A reflux pipe connected to a sludge discharge pipe is provided at the lower part of the annular water pool 11, and valves are provided on both the reflux pipe and the sludge discharge pipe; wherein, the effluent from the aerobic pool 3 is discharged into the circulating water pool 11, and there is still some sludge in the water, which can consume the dissolved oxygen in the water. At the same time, by switching the valve, only one sludge pump can be used to realize the reflux of nitrification liquid and sludge; wherein the sludge discharge pipe draws the sludge in the circulating water pool 11 and the secondary sedimentation tank 8 to the siphon pulse water distributor 2 and returns it to the anoxic pool 4, realizing the reflux of the nitrification liquid after deoxygenation, which will not increase the dissolved oxygen in the anoxic pool 4, and improving the denitrification and denitrification effect of the anoxic pool 4.

[0023] How it works

[0024] The circulating water pump 10 is started, water enters the ejector 6, and the water in the circulating water pool 11 will be sucked into the ejector 6, so that the ejector 6 will eject a strong water-gas mixture from the water outlet, which not only produces a large number of tiny bubbles to supply dissolved oxygen to microorganisms, but also can push the sewage to make it flow continuously in one direction, so that the sewage is continuously circulated in the aerobic pool 3, and cooperates with the fluidized filler in the water to greatly increase the concentration of microorganisms in the sewage, so that the microorganisms and sewage are fully mixed, which can improve the sewage treatment efficiency.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "upper", "lower", "left", "right", "front", "rear" and similar expressions used herein are for illustrative purposes only.

[0026] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A sewage treatment equipment, characterized in that: The invention comprises an aerobic pool (3) connected to an anoxic pool (4) through a water inlet pipe, an annular water inlet pipe (1) installed on the top of the aerobic pool (3), a plurality of water outlet pipes (5) connected to the annular water inlet pipe (1), a plurality of drainage pipes connected to the water outlet pipe (5), and an ejector (6) connected to the drainage pipe. The interior of the aerobic pool (3) is filled with fluidized filler. The bottom of the water inlet pipe is located at the lower part of the aerobic pool (3). The plurality of water outlet pipes are circumferentially distributed in the aerobic pool (3). The air intake in the ejector (6) is connected to the atmosphere through an air pipe. The water inlet of the ejector (6) is connected to the drainage pipe. The water outlet of the ejector (6) is arranged obliquely upward. The water outlet pipe (5) points to the axis of the aerobic pool (3).

2. The sewage treatment equipment according to claim 1, characterized in that: The anoxic pool (4) and the aerobic pool (3) are cylindrical, the anoxic pool (4) is located inside the aerobic pool (3), and the anoxic pool (4) is connected to a siphon-type pulse water distributor (2).

3. The sewage treatment equipment according to claim 2, characterized in that: A conical plate is provided at the bottom of the water distribution pipe (14) in the siphon-type pulse water distributor, and a water outlet gap is provided between the conical plate and the water distribution pipe (14).

4. The sewage treatment equipment according to claim 2, characterized in that: The middle part of the anoxic pool (4) is filled with fixed filler through the installation chamber.

5. The sewage treatment equipment according to claim 2, characterized in that: A water outlet trough (12) is provided at the top of the aerobic tank (3), the water outlet trough (12) is connected to the circulating water tank (11), the top of the circulating water tank (11) is connected to the secondary sedimentation tank (8), and the top of the secondary sedimentation tank (8) is connected to the clean water tank (7).

6. The sewage treatment equipment according to claim 5, characterized in that: The bottom of the circulating water pool (11) is connected to the annular water inlet pipe (1) via a circulating water pump (10).

7. The sewage treatment equipment according to claim 5, characterized in that: One side of the water outlet trough (12) is in communication with the top of the aerobic pool (3), and the other side of the water outlet trough (12) is provided with a slot, on which an interception net (13) is embedded.

8. The sewage treatment equipment according to claim 7, characterized in that: The circulating water pool (11) is connected to the middle and lower part of the secondary sedimentation tank (8) through a central pipe, and the top of the central pipe is connected to the atmosphere.

9. The sewage treatment equipment according to claim 5, characterized in that: The bottom of the secondary sedimentation tank (8) is connected to a sludge discharge pipe, and the sludge discharge pipe is connected to a siphon pulse water distributor (2) via a sludge return pump (9).

10. The sewage treatment equipment according to claim 9, characterized in that: A return pipe connected to the mud discharge pipe is provided at the lower part of the circulating water pool (11), and valves are provided on both the return pipe and the mud discharge pipe.

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