A water distribution structure used in small integrated sewage treatment equipment

Abstract

The present application provides a water distribution structure used in a small integrated sewage treatment equipment, which belongs to the field of sewage treatment technology, including an anoxic tank, a primary aerobic tank, a secondary aerobic tank, a sedimentation tank and a disinfection tank connected in sequence, and a water distribution assembly is arranged inside the anoxic tank, and the water distribution assembly includes an inlet pipe and a branch pipe, and the inlet pipe runs through the top of the anoxic tank. In the above scheme, by setting an anoxic tank, an inlet pipe and a branch pipe, the anoxic tank adopts bottom upflow water inlet, and drainage holes are evenly arranged on the branch pipes at the bottom of the pool to avoid the influence of dissolved oxygen carried by high-level water inlet on the anoxic environment. The aperture of the drainage hole on the branch pipe gradually decreases along the direction of water flow, and the aperture of the drainage hole at the front end is larger, which can reduce the water outlet pressure at the front end, so that the impact force of the water outlet of the drainage hole of the entire branch pipe is more uniform.

Description

Technical Field

[0001] The present application relates to the technical field of sewage treatment, and in particular to a water distribution structure used in a small integrated sewage treatment device. Background Art

[0002] At present, there are a large number of rural areas, small towns, suburban living areas, resorts and villa areas in my country, and they are scattered. On-site treatment of these scattered sewage that cannot be included in the urban centralized pipe network can not only effectively control point source pollution, but also easily realize the resource utilization of sewage;

[0003] Small integrated sewage treatment equipment is like a small sewage treatment plant, which closely connects each treatment unit together. It has the advantages of high treatment efficiency, low energy consumption, low sludge production, convenient management, and small footprint. Therefore, small integrated sewage treatment equipment has irreplaceable advantages in the field of decentralized domestic sewage treatment.

[0004] The A / O process is simple, easy to operate and manage, low-cost, and can simultaneously remove nitrogen and phosphorus. It is a commonly used process in small integrated sewage treatment equipment. Since the A / O process mainly relies on microorganisms to purify sewage, whether the water distribution is uniform has a great impact on the treatment effect of the A / O process. Uneven water distribution will lead to different treatment loads at different locations in the same pool. If the treatment load is low, the microorganisms cannot fully play their role. If the treatment load is high, the sewage cannot be fully treated. Only by uniform water distribution can the treatment load in the same pool be consistent, and short-circuit and dead zones can be avoided, so that the entire sewage treatment system can achieve good treatment effects.

[0005] At present, the A / O process generally adopts a single point of water inlet, which results in uneven water distribution. Moreover, if water enters the anoxic pool from a high point, it will carry more dissolved oxygen, affecting the anoxic environment and thus the treatment effect of the entire system. Utility Model Content

[0006] In view of this, the purpose of this application is to provide a water distribution structure used in a small integrated sewage treatment equipment to control the dissolved oxygen content during sewage treatment and solve the problem of uneven water distribution caused by single-point water inlet in the prior art.

[0007] In order to solve the above technical problems, this application provides the following technical solutions:

[0008] A water distribution structure used in a small integrated sewage treatment device comprises an anoxic tank, a primary aerobic tank, a secondary aerobic tank, a sedimentation tank and a disinfection tank which are connected in sequence, wherein a water distribution assembly is arranged inside the anoxic tank, and the water distribution assembly comprises an inlet pipe and a branch pipe, wherein the inlet pipe passes through the top of the anoxic tank, the branch pipe is connected to the bottom of the inlet pipe, a drainage hole is provided at the bottom of the branch pipe, a delivery pipe is sleeved at the end of the branch pipe, a spiral shaft is connected inside the delivery pipe, and a driving assembly for driving the spiral shaft to rotate is arranged on the side wall of the anoxic tank.

[0009] Preferably, the driving assembly comprises: a servo motor, a transmission shaft, a gear box, a driving bevel gear, a driven bevel gear and a column gear;

[0010] The servo motor is fixedly connected to one side of the top of the anoxic pool, the transmission shaft is connected to the output end of the servo motor, the gear box is fixed to the lower position of the inner wall of the anoxic pool, the active bevel gear is rotatably arranged at the upper position inside the gear box, and the driven bevel gear is rotatably arranged at the inner side wall position of the gear box;

[0011] The column gear is fixed to the end of the screw shaft, and the driven bevel gear is connected to one of the column gears.

[0012] Preferably, a water pump is connected to the bottom of the delivery pipe, and a drainage pipe is provided on the top of the delivery pipe away from the branch pipe.

[0013] Preferably, a stirring rod is provided on the outer side of the transmission shaft.

[0014] Preferably, two rows of drainage holes are provided at the bottom of the branch pipe, and the angle between the two rows of drainage holes is 90 degrees.

[0015] Preferably, the diameter of the bottom drainage hole of the branch pipe decreases along the water flow direction.

[0016] Preferably, a through hole connected to the primary aerobic tank is opened at the upper part of the side wall of the anoxic tank, and a through hole connected to the secondary aerobic tank is opened at the lower part of the side wall of the primary aerobic tank.

[0017] Preferably, a through hole connected to the primary aerobic tank is opened at the upper part of the side wall of the anoxic tank, and a through hole connected to the secondary aerobic tank is opened at the lower part of the side wall of the primary aerobic tank.

[0018] Preferably, a collecting tank is fixedly connected to the upper position of the side wall of the secondary aerobic tank, and water distribution pipes are arranged at equal intervals at the bottom of the collecting tank. The water distribution pipes are in an "L" shape, and the horizontal part of the water distribution pipes passes through the side wall of the secondary aerobic tank and extends to the inside of the sedimentation tank. Compared with the prior art, the present application has at least the following beneficial effects:

[0019] In the above scheme, an anoxic pool, an inlet pipe and a branch pipe are set up. The anoxic pool adopts bottom upflow water inlet, and drainage holes are evenly arranged on the branch pipes at the bottom of the pool to avoid the influence of dissolved oxygen carried by high-level inlet water on the anoxic environment. The aperture of the drainage hole on the branch pipe gradually decreases along the direction of water flow. The aperture of the drainage hole at the front end is larger, which can reduce the water outlet pressure at the front end and make the impact force of the water outlet of the entire branch pipe drainage hole more uniform.

[0020] In the above scheme, by setting up anoxic tanks, aerobic tanks and secondary aerobic tanks, the sewage flows in an S shape when passing through the anoxic tank, the primary aerobic tank and the secondary aerobic tank, ensuring a long process, achieving multi-point water inlet, ensuring uniform water distribution while controlling the water flow rate and ensuring reaction time.

[0021] In the above scheme, by setting a conveying pipe, a screw shaft and a driving assembly, the driving assembly drives the screw shaft to rotate, thereby further stirring the sewage and sludge. After the sludge is suspended, the increase of DO can be effectively avoided. At the same time, the cooperation of the screw shaft and the conveying pipe can extract the sewage inside the branch pipe. The screw shaft has a stirring effect on the sewage and sludge, which are further mixed and discharged to achieve the purpose of controlling DO. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0023] Figure 1 It is a schematic diagram of the overall structure in this application;

[0024] Figure 2 This is a schematic diagram of the cross-sectional structure of the anoxic pool in this application;

[0025] Figure 3 This is a schematic diagram of the cross-sectional structure of the delivery pipe in this application;

[0026] Figure 4 This is a schematic diagram of the cross-sectional structure of the branch pipe in this application;

[0027] Figure 5 This is a schematic diagram of the collecting tank structure in this application;

[0028] Figure 6 This is a schematic diagram of the transmission shaft structure in this application.

[0029] [reference numerals]

[0030] Anoxic tank 1, water inlet pipe 101, branch pipe 102, primary aerobic tank 2, secondary aerobic tank 3, collecting tank 301, water distribution pipe 302, sedimentation tank 4, disinfection tank 5, delivery pipe 6, screw shaft 601, water pumping pipe 602, drainage pipe 603, servo motor 701, transmission shaft 702, stirring rod 7021, gear box 703, driving bevel gear 704, driven bevel gear 705, column gear 706. DETAILED DESCRIPTION

[0031] like Figure 1 , Figure 2 , Figure 3 A water distribution structure used in a small integrated sewage treatment device is shown in the embodiment of the present application, comprising an anoxic tank 1, a primary aerobic tank 2, a secondary aerobic tank 3, a sedimentation tank 4 and a disinfection tank 5 which are connected in sequence, a water distribution assembly is arranged inside the anoxic tank 1, and the water distribution assembly comprises an inlet pipe 101 and a branch pipe 102, the inlet pipe 101 passes through the top of the anoxic tank 1, the branch pipe 102 is connected to the bottom of the inlet pipe 101, a drainage hole is provided at the bottom of the branch pipe 102, a delivery pipe 6 is sleeved at the end of the branch pipe 102, a spiral shaft 601 is connected inside the delivery pipe 6, and a driving assembly for driving the spiral shaft 601 to rotate is arranged on the side wall of the anoxic tank 1;

[0032] By connecting the water inlet pipe 101 to an external pressure water source, the sewage can flow into the branch pipe 7 through the water inlet pipe 101. A plurality of branch pipes 7 are provided, and they are all equidistantly distributed. The sewage can flow into the anoxic tank 1 through the drainage holes at the bottom of the branch pipes 7. The branch pipe 7 is provided at the lower position inside the anoxic tank 1, and can be fully mixed with the sludge inside the anoxic tank 1. With the continuous injection of sewage, the water flow is used to stir the sludge, so that the sewage and the sludge are evenly mixed.

[0033] The screw shaft 601 is driven to rotate by the driving component to further stir the sewage and sludge. After the sludge is suspended, the increase of DO can be effectively avoided. At the same time, the cooperation between the screw shaft 601 and the conveying pipe 6 can extract the sewage inside the branch pipe 102. The screw shaft 601 has a stirring effect on the sewage and sludge, which are further mixed and discharged to achieve the purpose of controlling DO.

[0034] In this embodiment, Figure 3-Figure 6 As shown, the driving assembly includes: a servo motor 701, a transmission shaft 702, a gear box 703, a driving bevel gear 704, a driven bevel gear 705 and a column gear 706;

[0035] The servo motor 701 is fixedly connected to one side of the top of the anoxic pool 1, the transmission shaft 702 is connected to the output end of the servo motor 701, the gear box 703 is fixed to the lower position of the inner wall of the anoxic pool 1, the driving bevel gear 704 is rotatably arranged at the upper position inside the gear box 703, and the driven bevel gear 705 is rotatably arranged at the inner side wall position of the gear box 703;

[0036] The column gear 706 is fixed to the end of the screw shaft 601, and the driven bevel gear 705 is connected to one of the column gears 706;

[0037] The servo motor 701 drives the transmission shaft 702 to rotate, and the driving bevel gear 704 is connected to the transmission shaft 702. The driving bevel gear 704 drives the driven bevel gear 705 to rotate, and the driven bevel gear 705 drives the column gear 706 to rotate, so that the screw shaft 601 can rotate inside the conveying pipe 6;

[0038] The ends of the screw shaft 601 are fixed with column gears 706, and two adjacent column gears 706 mesh with each other, thereby driving the screw shaft 601 to rotate synchronously, achieving the effect of uniform distribution of sewage and sludge;

[0039] When the amount of sewage injected into the anoxic tank 1 is close to saturation, the sewage is stopped from being injected into the water inlet pipe 101, and the fluidity of the sewage in the anoxic tank 1 is maintained by the cooperation of the driving assembly, the delivery pipe 6 and the screw shaft 601, so as to control the dissolved oxygen content in the anoxic tank 1 and ensure the treatment effect;

[0040] The gear box 703 has a protective effect on the active bevel gear 704, the driven bevel gear 705 and the column gear 706, which can prevent them from being affected by impurities in the sewage, ensure the accuracy of their meshing, and make the transmission system as a whole stable and smooth.

[0041] The bottom of the delivery pipe 6 is connected to a water pumping pipe 602, and the top of the delivery pipe 6 is provided with a drainage pipe 603 on a side away from the branch pipe 102;

[0042] The pumping pipe 602 is directly facing the bottom of the anoxic tank 1, and can extract sewage and sludge. After being stirred and squeezed by the spiral shaft 601, the sewage and sludge are discharged upward through the drain pipe 603, so that the sludge is in a good suspension state in the anoxic tank 1, and the dissolved oxygen content in various places inside the anoxic tank 1 is controlled;

[0043] A stirring rod 7021 is provided on the outer side of the transmission shaft 702;

[0044] The transmission shaft 702 is arranged vertically inside the anoxic tank 1, and the transmission shaft 702 is parallel to the drainage direction of the drain pipe 603. The stirring rod 7021 arranged outside the transmission shaft 702 has a stirring effect on the sewage, and the turbulence generated by the sewage flow interferes with each other, thereby ensuring the uniform distribution of sewage and sludge in the anoxic tank 1.

[0045] Two rows of drainage holes are provided at the bottom of the branch pipe 102, and the angle between the two rows of drainage holes is 90 degrees;

[0046] The drainage holes at the bottom of the branch pipe 102 face two directions respectively, and the drainage direction is obliquely downward, so as to ensure that a water flow from bottom to top is generated in the anoxic tank 1, and the sludge in the anoxic tank 1 is fully aroused. The water flow sprayed by the conveying pipe 6 and the spiral shaft 601, and the stirring effect of the stirring rod 7021 on the water flow, fully ensure the mixing effect of the sludge and the sewage, ensure the sufficiency of the sewage reaction in the anoxic tank 1, and ensure the treatment effect;

[0047] The diameter of the drainage hole at the bottom of the branch pipe 102 decreases along the water flow direction;

[0048] Since the diameter of the drainage holes on the branch pipe 102 gradually decreases along the water flow direction, the diameter of the drainage holes at the front end is larger, which can reduce the water outlet pressure at the front end and make the water outlet of the entire branch pipe 102 more uniform;

[0049] A through hole connected to the primary aerobic pool 2 is provided at the upper side wall of the anoxic pool 1, and a through hole connected to the secondary aerobic pool 3 is provided at the lower side wall of the primary aerobic pool 2;

[0050] The sewage flows in an S shape when passing through the anoxic tank 1, the primary aerobic tank 2 and the secondary aerobic tank 3, ensuring a long process flow while controlling the water flow rate to ensure the reaction time;

[0051] A collecting tank 301 is fixedly connected to the upper side wall of the secondary aerobic tank 3, and water distribution pipes 302 are evenly spaced at the bottom of the collecting tank 301. The water distribution pipes 302 are in an "L" shape, and the horizontal part of the water distribution pipes 302 passes through the side wall of the secondary aerobic tank 3 and extends to the interior of the sedimentation tank 4;

[0052] The collecting tank 301 is used to collect sewage in the secondary aerobic tank 3 and divert it through the water distribution pipe 302 to slow down the water flow rate, improve the mud-water separation effect of the sedimentation tank 4, and improve the effluent water quality.

Claims

1. A water distribution structure used in a small integrated sewage treatment equipment, characterized in that: The invention comprises an anoxic pool (1), a primary aerobic pool (2), a secondary aerobic pool (3), a sedimentation pool (4) and a disinfection pool (5) which are connected in sequence. A water distribution assembly is arranged inside the anoxic pool (1). The water distribution assembly comprises an inlet pipe (101) and a branch pipe (102). The inlet pipe (101) passes through the top of the anoxic pool (1). The branch pipe (102) is connected to the bottom of the inlet pipe (101). A drainage hole is provided at the bottom of the branch pipe (102). A delivery pipe (6) is sleeved at the end of the branch pipe (102). A spiral shaft (601) is connected inside the delivery pipe (6). A driving assembly for driving the spiral shaft (601) to rotate is arranged on the side wall of the anoxic pool (1).

2. The water distribution structure used in a small integrated sewage treatment equipment according to claim 1 is characterized in that: The driving assembly comprises: a servo motor (701), a transmission shaft (702), a gear box (703), a driving bevel gear (704), a driven bevel gear (705) and a column gear (706); The servo motor (701) is fixedly connected to one side of the top of the anoxic pool (1), the transmission shaft (702) is connected to the output end of the servo motor (701), the gear box (703) is fixed to the lower position of the inner wall of the anoxic pool (1), the driving bevel gear (704) is rotatably arranged at the upper position inside the gear box (703), and the driven bevel gear (705) is rotatably arranged at the inner side wall position of the gear box (703); The column gear (706) is fixed to the end of the screw shaft (601), and the driven bevel gear (705) is connected to one of the column gears (706).

3. The water distribution structure used in a small integrated sewage treatment equipment according to claim 1 is characterized in that: The bottom of the delivery pipe (6) is connected to a water pump (602), and a drainage pipe (603) is provided on the top of the delivery pipe (6) away from the branch pipe (102).

4. The water distribution structure used in a small integrated sewage treatment equipment according to claim 2 is characterized in that: A stirring rod (7021) is arranged on the outer side of the transmission shaft (702).

5. The water distribution structure used in a small integrated sewage treatment equipment according to claim 1 is characterized in that: Two rows of drainage holes are provided at the bottom of the branch pipe (102), and the angle between the two rows of drainage holes is 90 degrees.

6. The water distribution structure used in a small integrated sewage treatment equipment according to claim 1 is characterized in that: The diameter of the drainage hole at the bottom of the branch pipe (102) decreases along the water flow direction.

7. The water distribution structure used in a small integrated sewage treatment equipment according to claim 1 is characterized in that: A through hole connected to the primary aerobic pool (2) is provided at the upper part of the side wall of the anoxic pool (1), and a through hole connected to the secondary aerobic pool (3) is provided at the lower part of the side wall of the primary aerobic pool (2).

8. The water distribution structure used in a small integrated sewage treatment equipment according to claim 1 is characterized in that: A collecting tank (301) is fixedly connected to the upper side wall of the secondary aerobic tank (3), and water distribution pipes (302) are arranged at equal intervals at the bottom of the collecting tank (301). The water distribution pipes (302) are in an "L" shape, and the horizontal portion of the water distribution pipes (302) penetrates the side wall of the secondary aerobic tank (3) and extends to the interior of the sedimentation tank (4).

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