CN218521137U

CN218521137U - MBBR process units

Info

Publication number: CN218521137U
Application number: CN202222044713.0U
Authority: CN
Inventors: 雷潇; 张巧丽; 蔡宇婷; 唐锐青
Original assignee: Shaanxi Dantang Environment Technology Co ltd; Shaanxi Datang Water Co ltd
Current assignee: Shaanxi Dantang Environment Technology Co ltd; Shaanxi Datang Water Co ltd
Priority date: 2022-08-04
Filing date: 2022-08-04
Publication date: 2023-02-24
Anticipated expiration: 2032-08-04

Abstract

The utility model discloses a MBBR process units belongs to sewage treatment technical field. The device comprises: an MBBR tank and a blower; the MBBR tank is filled with MBBR filler, and two opposite side walls of the MBBR tank are respectively connected with a water inlet pipe and a water outlet pipe; the MBBR tank is characterized in that two perforated aeration main pipes are arranged at the bottom of the inner side of the MBBR tank, a plurality of perforated aeration branch pipes are connected between the perforated aeration main pipes, a plurality of microporous aeration discs are connected to the perforated aeration branch pipes, and a plurality of aeration holes are formed in the perforated aeration branch pipes; the outlet of the blower is connected with a perforated aeration vertical pipe, and the perforated aeration vertical pipe is connected with one of the perforated aeration main pipes. The utility model discloses in, micropore aeration dish provides the supply of dissolved oxygen for the microorganism in the activated sludge, and the aeration hole provides power for circulation and fluidization that MBBR packed when supplying dissolved oxygen to strengthen the circulation and the fluidization effect of packing, improve the treatment effeciency.

Description

MBBR process units

Technical Field

The utility model relates to a sewage treatment technical field, in particular to MBBR process units.

Background

The MBBR (moving bed biofilm reactor) process is characterized in that a certain amount of suspension carriers are added into a device, the specific gravity of the fillers is close to that of water suspended in water, and the mass transfer effects of pollutant dissolved oxygen and a biofilm are enhanced, so that a nitration reaction and a denitrification reaction exist at the same time, and the treatment effect is improved.

Uniformity and oxygen transfer efficiency are mainly considered in the prior art, the aeration device is only provided with the micropore aeration disc in the MBBR tank, the application of the MBBR process can weaken the fluidization of the filler and lead the filler to easily gather at dead angles of the tank body, and the treatment efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's defect, provide a MBBR process units, the device includes: an MBBR tank and a blower;

the MBBR tank is filled with MBBR filler, and two opposite side walls of the MBBR tank are respectively connected with a water inlet pipe and a water outlet pipe;

the MBBR tank is characterized in that two perforated aeration main pipes are arranged at the bottom of the inner side of the MBBR tank, a plurality of perforated aeration branch pipes are connected between the perforated aeration main pipes, a plurality of microporous aeration discs are connected to the perforated aeration branch pipes, and a plurality of aeration holes are formed in the perforated aeration branch pipes;

the outlet of the air blower is connected with a perforated aeration vertical pipe, and the other end of the perforated aeration vertical pipe is connected with one of the perforated aeration main pipes.

Further, a reflux pump is arranged in the MBBR tank.

Furthermore, a water outlet interception system is connected in the MBBR tank and divides the MBBR tank into a first grid and a second grid, the water inlet pipe is positioned on the side wall of the first grid, and the water outlet pipe is positioned on the side wall of the second grid;

the backflow pump is located in the second grid, and the MBBR filler, the main perforating aeration pipe, the branch perforating aeration pipe and the vertical perforating aeration pipe are located in the first grid.

Further, the height of inlet tube and outlet pipe is higher than the height of backwash pump.

Furthermore, the water outlet pipe is a perforated pipe, and a plurality of holes are formed in the end part of the water outlet pipe, which is positioned in the MBBR tank;

the holes are circular, the diameter is 10-20mm, and the center distance between every two adjacent holes is 100-200mm.

Furthermore, the direction of the aeration holes is downward, and the center line of the aeration holes forms an included angle of 0-60 degrees with the vertical direction.

Furthermore, the central line of the aeration hole forms an included angle of 45 degrees with the vertical direction.

Further, the microporous aeration discs are arranged on the perforated aeration branch pipes at equal intervals.

Furthermore, the aperture of each aeration hole is 3-10mm, the hole center distance between every two adjacent aeration holes is 50-200mm,

and the aeration holes are distributed in a non-equidistant way, and the hole pitch of the aeration holes is gradually reduced from the perforation aeration main pipe connected with the perforation aeration vertical pipe to the other perforation aeration main pipe.

Further, a valve flowmeter is connected to the perforated aeration vertical pipe.

The beneficial effects of the utility model reside in that: in the utility model, the perforated aeration branch pipe in the MBBR tank is connected with a plurality of microporous aeration discs and is provided with a plurality of aeration holes, the microporous aeration discs provide dissolved oxygen for microorganisms in the activated sludge, and the aeration holes provide power for circulation and fluidization of MBBR filler while supplying the dissolved oxygen, thereby enhancing the circulation and fluidization effect of the filler and improving the treatment efficiency; secondly, the MBBR pool is divided into two grids by the water outlet interception system, and the water outlet pipe adopts a perforated pipe, so that the blockage of a pipeline and a submersible reflux pump by fillers is avoided; additionally, the utility model discloses well aeration hole sets up downwards and can weaken the impact of the bubble that the aeration hole came out to MBBR filler, avoids MBBR filler to hang the biomembrane and drops in a large number on, and aeration hole non-equidistance can guarantee the wind pressure homogeneity.

Drawings

Fig. 1 is a plan view of an MBBR process apparatus provided by the present invention;

FIG. 2 is a cross-sectional view of an MBBR process unit provided by the present invention;

FIG. 3 is a schematic view of a perforated aeration branch pipe of the MBBR processing device provided by the utility model;

fig. 4 is a schematic view of an aeration hole provided by the present invention.

Reference numerals: 1-water inlet pipe; 2-MBBR filler; 3-perforating the aeration main pipe; 4-perforating the aeration vertical pipe; 5-perforating aeration branch pipes; 6-microporous aeration disc; 7-aeration holes; 8-a water outlet interception system; 9-reflux pump; 10-water outlet perforated pipes; 11-a blower; 12-a ball valve; 13-a gas flow meter; 14-MBBR pool; 15-hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Referring to fig. 1-4, an MBBR process plant comprises: MBBR tank 14 and blower 11; the MBBR pool 14 is internally connected with a water outlet interception system 8, the water outlet interception system 8 can be an interception screen mesh, the water outlet interception system 8 divides the MBBR pool 14 into a first grid and a second grid, the upper part of the side wall of the first grid is connected with a water inlet pipe 1, the upper part of the side wall of the second grid is connected with a water outlet pipe 10, the water inlet pipe 1 and the water outlet pipe 10 are respectively positioned on two opposite sides of the MBBR pool 14, the bottom of the inner side of the first grid of the MBBR pool 14 is connected with two main perforating aeration pipes 3 through a pipeline support, a plurality of branch perforating aeration pipes 5 are communicated between the main perforating aeration pipes 3, the branch perforating aeration pipes 5 are connected with a plurality of microporous aeration disks 6, the microporous aeration disks 6 are arranged on the branch perforating aeration pipes 5 at equal intervals, a plurality of aeration holes 7 are formed in the branch perforating aeration pipes 5, the directions of the aeration holes 7 are downward, the central lines of the aeration holes 7 and the vertical directions are 0-60 degrees, preferably 45 degrees, the best fluidization and circulation of the MBBR fillers are ensured, the first grid of the MBBR pool 14 is filled with MBBR fillers 2, the second grid of the MBBR pool 14 is internally provided with a water inlet pipe 9, and a water outlet pipe 10 which are higher than the water inlet pipe 9.

The outlet of the blower 11 is connected with a perforated aeration riser pipe 4, the other end of the perforated aeration riser pipe 4 is connected with one perforated aeration main pipe 3, the perforated aeration riser pipe 4 is connected with a valve 12 and a flow meter 13, so that the oxygen can be controlled to enter through the valve 12 and the flow meter 13, the aperture of each aeration hole 7 is 3-10mm, the hole center distance of the adjacent aeration holes is 50-200mm, the aeration holes 7 are distributed in a non-equidistant mode, the hole distance of each aeration hole 7 is gradually reduced from the perforated aeration main pipe 3 connected with the perforated aeration riser pipe 4 to the other perforated aeration main pipe 3, the non-equidistant mode of the aeration holes 7 is that the air pressure of the air from the blower 11 is the largest at the far end of the perforated aeration branch pipe 5, the air pressure is smaller at the position closer to an air source, multiple holes at the far end can effectively release the pressure, and the near-end air pressure uniformity is ensured; the water outlet pipe 10 is a perforated pipe, a plurality of holes 15 are formed in the end part, located in the MBBR tank 14, of the water outlet pipe 10, the holes 15 are circular, the diameter of each hole is 10-20mm, and the center distance between every two adjacent holes 15 is 100-200mm.

Wherein the MBBR filler 2 is generally made of High Density Polyethylene (HDPE) or polyurethane, the specific gravity of the MBBR filler is close to that of water suspended in water, and the specific surface area of the MBBR filler is more than 350 square meters per m ³ ). The main perforating aeration pipe 3, the vertical perforating aeration pipe 4 and the branch perforating aeration pipe 5 are made of ABS resin, so that the weight is light, the corrosion is resistant, the deformation is not easy under high wind speed, and the long service life can be ensured in sewage.

The utility model discloses a complete work flow can be: sewage is conveyed into an MBBR tank 14 through a water inlet pipe 1, under the action of an air blower 11, external air sequentially passes through a perforated aeration vertical pipe 4 and a perforated aeration main pipe 3 and enters a perforated aeration branch pipe 5, a microporous aeration disc 6 and aeration holes 7 on the perforated aeration branch pipe 5 are subjected to aeration operation, the sewage continuously reacts with MBBR fillers 2 in the MBBR tank 14 in the aeration process, the purification of the sewage is realized, and the fluidization of carriers of the MBBR fillers 2 and the supply of dissolved oxygen can be simultaneously realized through a combined aeration system of the microporous aeration disc 6 and the aeration holes 7; dissolved oxygen diffuses into a biomembrane of an MBBR filler 2 carrier through a membrane-biomembrane interface, a dissolved oxygen gradient exists in the biomembrane, so that the biomembrane forms an anaerobic layer, an anoxic layer and an aerobic layer from inside to outside, synchronous nitrification and denitrification of the MBBR are realized, aerobic ammonia oxidizing bacteria, nitrite oxidizing bacteria and aerobic denitrifying bacteria distributed on the aerobic layer of the biomembrane cooperate with anaerobic ammonia oxidizing bacteria, autotrophic nitrite bacteria and denitrifying bacteria distributed on the anoxic layer of the organism to finally achieve the aim of denitrification, nitrate and nitrite are converted into nitrogen by utilizing the denitrification of the denitrifying bacteria by taking organic matters in the sewage as a carbon source, so that the denitrification is realized, phosphorus accumulating bacteria release phosphorus under anaerobic conditions and excessively absorb accumulated phosphorus from wastewater under aerobic conditions, so that the phosphorus removal effect is realized, the treated sewage is discharged from a water outlet pipe 10, a reflux pump 9 is connected with a preposed treatment tank through a pipeline and is used for circularly conveying a sludge-water mixture of the MBBR tank into the preposed treatment tank, the preposed treatment tank is generally a denitrification tank, and the refluxed sludge-water mixture can be subjected to denitrification reaction in the anoxic denitrification tank.

It is worth explaining that, in the utility model, the perforated aeration branch pipe in the MBBR tank is connected with a plurality of microporous aeration discs and is provided with a plurality of aeration holes, the microporous aeration discs provide dissolved oxygen for microorganisms in the activated sludge, and the aeration holes provide power for circulation and fluidization of MBBR filler while providing the dissolved oxygen, thereby enhancing the circulation and fluidization effect of the filler and improving the treatment efficiency; secondly, the MBBR tank is divided into two lattices by the water outlet interception system, and the water outlet pipe adopts a perforated pipe, so that the phenomenon that the pipeline is blocked by filler and the submersible reflux pump is blocked is avoided; additionally, the utility model discloses well aeration hole sets up downwards and can weaken the impact of the bubble that the aeration hole came out to MBBR filler, avoids MBBR filler to hang the biomembrane and drops in a large number on, and aeration hole non-equidistance can guarantee the wind pressure homogeneity.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. An MBBR process apparatus, the apparatus comprising: an MBBR tank (14) and a blower (11);

the MBBR tank (14) is filled with an MBBR filler (2), and two opposite side walls of the MBBR tank (14) are respectively connected with a water inlet pipe (1) and a water outlet pipe (10);

the MBBR tank (14) is characterized in that two perforated aeration main pipes (3) are arranged at the bottom of the inner side of the MBBR tank (14), a plurality of perforated aeration branch pipes (5) are connected between the perforated aeration main pipes (3), a plurality of microporous aeration discs (6) are connected to the perforated aeration branch pipes (5), and a plurality of aeration holes (7) are formed in the perforated aeration branch pipes (5);

the outlet of the air blower (11) is connected with a perforated aeration vertical pipe (4), and the other end of the perforated aeration vertical pipe (4) is connected with one of the perforated aeration main pipes (3).

2. An MBBR process plant according to claim 1, wherein a reflux pump (9) is provided within said MBBR tank (14).

3. An MBBR process unit according to claim 2, wherein a water outlet interception system (8) is connected in the MBBR tank (14), the water outlet interception system (8) divides the MBBR tank (14) into a first grid and a second grid, the water inlet pipe (1) is positioned on the side wall of the first grid, and the water outlet pipe (10) is positioned on the side wall of the second grid;

the reflux pump (9) is located in the second compartment, and the MBBR packing (2), the main perforated aerator pipe (3), the branch perforated aerator pipe (5), and the vertical perforated aerator pipe (4) are located in the first compartment.

4. An MBBR process unit according to claim 3, wherein the height of said inlet pipe (1) and said outlet pipe (10) is higher than the height of said reflux pump (9).

5. An MBBR processing device according to claim 1, wherein the outlet pipe (10) is a perforated pipe, and a plurality of holes (15) are arranged on the end of the outlet pipe (10) in the MBBR tank (14);

the holes (15) are circular, the diameter is 10-20mm, and the center distance between every two adjacent holes (15) is 100-200mm.

6. An MBBR processing apparatus according to claim 1, wherein the direction of the aeration holes (7) is downward, and the center line of the aeration holes (7) forms an angle of 0-60 ° with the vertical direction.

7. An MBBR processing plant according to claim 6, wherein the center line of said aeration holes (7) is at an angle of 45 ° to the vertical.

8. An MBBR process unit according to claim 1, wherein said micro-perforated aeration disks (6) are equally spaced on said perforated aeration laterals (5).

9. An MBBR processing apparatus according to claim 1, wherein the aperture of said aeration holes (7) is 3-10mm, the hole center distance between adjacent aeration holes is 50-200mm,

and the aeration holes (7) are distributed in a non-equidistant way, and the hole pitch of the aeration holes (7) is gradually reduced from the perforated aeration main pipe (3) connected with the perforated aeration vertical pipe (4) to the other perforated aeration main pipe (3).

10. An MBBR process plant according to claim 1, wherein a valve (12) and a flow meter (13) are connected to said perforated aerated riser (4).