CN210764536U - Aeration pipe and aeration device and membrane bioreactor based on same - Google Patents

Abstract

The utility model relates to an aeration pipe and aeration equipment and membrane bioreactor based on it, the utility model discloses an aeration pipe, including the main air flow pipe with encircle in at least one manifold around the main air flow pipe, the one end of main air flow pipe is the open end, and the other end is the blind end, the open end is used for the air feed stream to let in, seted up an at least slit area on the pipe wall of main air flow pipe, follow in the direction of open end to blind end, the opening width grow gradually of slit area, the mass flow chamber cover is located the outside of slit area, set up the air vent that a plurality of intervals set up on the manifold, the air vent is just right the slit area sets up. The utility model discloses can realize the evenly distributed of air current.

Description

Aeration pipe and aeration device and membrane bioreactor based on same

Technical Field

The utility model relates to a sewage treatment field especially relates to an aeration pipe and aeration equipment and membrane bioreactor based on it.

Background

The hollow fiber curtain type membrane component is one of the components commonly used in a Membrane Bioreactor (MBR), consists of a hollow fiber membrane tow and membrane shells positioned at two ends of the tow, belongs to a submerged component, and is directly immersed in a treatment tank when in use. In the process of sewage treatment, the membrane filaments can cause flux reduction due to the adhesion of pollutants on the surface, and the efficiency and the service life of the hollow fiber membrane module are influenced. In order to solve the problem, people often add an aeration device on the hollow fiber curtain type membrane component to make the membrane filaments swing so as to prevent the adhesion of pollutants on the surface of the membrane filaments. The aeration pipe is a common aeration device, one end of the aeration pipe is used for air inlet, the other end of the aeration pipe is closed, and air flow is blown to the membrane filaments through the open pores on the aeration pipe, so that the aeration pipe capable of uniformly conveying the air flow is designed, and each membrane filament is required to be uniformly acted by gas-liquid two-phase flow from top to bottom as much as possible.

Aeration pipes for uniformly conveying air flow are available, for example, a hollow fiber curtain type membrane module containing an internal aeration structure in chinese patent No. 201820696512.X, the aeration structure is that two rows of aeration holes are formed on a circular pipe, and the aeration is optimized by designing the diameter of the holes and the hole spacing. Such an aeration pipe cannot ensure uniformity of air flow in each aeration hole.

Chinese patent application No. 201420861758.X discloses an MBR membrane component with an aeration device, wherein aeration pipes are vertically and uniformly arranged in the MBR membrane component at intervals, each aeration pipe is provided with aeration holes at intervals from top to bottom, the diameter of the aeration hole at the upper part is small, and the interval distance between adjacent holes is large; the diameter of the aeration hole at the lower part is large, and the interval distance between adjacent holes is small, so that the uniform aeration of the aeration pipe from top to bottom is ensured, but the aperture size and the hole interval distance are not easy to control.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims at providing an aeration pipe and aeration equipment and membrane bioreactor based on it, the utility model discloses an aeration pipe can realize the evenly distributed of air current.

The utility model discloses an aeration pipe, including the main air flow pipe with surround in at least one manifold around the main air flow pipe, the one end of main air flow pipe is the open end, and the other end is the blind end, the open end is used for the air feed stream to let in, at least one slit district has been seted up on the pipe wall of main air flow pipe, follows in the direction of open end to blind end, the opening width grow gradually in slit district, the manifold cover is located the outside in slit district, set up the air vent that a plurality of intervals set up on the manifold, the air vent is just right the slit district sets up.

Further, the slit area is disposed along an axial direction of the main gas flow pipe.

Further, the number of slit areas is the same as the number of manifolds.

Further, the manifold comprises a bottom wall and a plurality of side walls vertically connected with the bottom wall, and one ends of the side walls far away from the bottom wall are tightly connected with the outer wall of the main airflow pipe.

Further, a vent hole is located on the bottom wall.

Further, the vent holes are evenly distributed along the extension direction of the slit area.

Further, the vent holes are circular, and the aperture of each vent hole is the same.

Further, the main gas flow tube is cylindrical.

The utility model discloses still claim an aeration equipment, it includes the above-mentioned aeration pipe of the utility model.

The utility model discloses still claim a membrane bioreactor, it includes aeration equipment, this aeration equipment includes the utility model discloses an above-mentioned aeration pipe.

Borrow by above-mentioned scheme, the utility model discloses at least, have following advantage:

the utility model discloses a set up the slit district on main air flow pipe, through the opening width who changes the slit district, and the air current gets into the manifold along the slit district, air vent in the rethread manifold flows, make the air current advance back in the passageway of main air flow pipe from the open end of main air flow pipe, but air pressure loss on the air flow pipeline direction is followed in effective compensation from the slit that the open end begins grow gradually, make the air current along the axis direction evenly distributed of main air flow pipe and advance the manifold, and then guaranteed gas flow's in every air vent even.

The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.

Drawings

FIG. 1 is a schematic structural view of a main gas flow tube of the present invention;

FIG. 2 is a schematic structural view of the manifold of the present invention;

fig. 3 is a schematic structural view of the aeration pipe of the present invention;

description of reference numerals:

1-a main gas flow tube; 2-a manifold; 10-a slit region; 11-open end; 20-a side wall; 21-bottom wall; 22-air vent.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

Example 1

Referring to the drawings, an aeration tube for uniformly distributing air flow according to a preferred embodiment of the present invention includes a main air flow tube 1 and at least one manifold 2 surrounding the main air flow tube 1. The main airflow pipe 1 is cylindrical, one end of the main airflow pipe is an open end 11, the other end of the main airflow pipe is a closed end, the open end 11 is used for introducing airflow, at least one slit area 10 is arranged on the pipe wall of the main airflow pipe 1, and the opening width of the slit area 10 is gradually increased along the direction from the open end 11 to the closed end. The slit area 10 is provided along the axial direction of the main air flow pipe 1. The number of the slit areas 10 on the main gas flow pipe 1 can be determined according to actual needs, and is matched with the number of the manifolds 2 and is uniformly distributed around the main gas flow pipe 1.

The manifold 2 covers the outside of the slit area 10, the manifold 2 includes a bottom wall 21 and a plurality of side walls 20 perpendicularly connected to the bottom wall 21, and one end of each side wall 20 away from the bottom wall 21 is tightly connected to the outer wall of the main airflow pipe 1. The bottom wall 21 of the manifold 2 is provided with a plurality of vent holes 22 arranged at intervals, and the vent holes 22 are arranged opposite to the slit area 10. The ventilation holes 22 are circular, and the diameters of the ventilation holes 22 are the same. The ventilation holes 22 are arranged in a row uniformly along the extending direction of the slit area 10 at a certain hole pitch on the bottom wall 21. If desired, multiple rows of aeration holes may be provided in the bottom wall 21 of the manifold 2.

Adopt the utility model discloses, the air current is from back in the open end 11 of main air flow pipe 1 enters main air flow pipe 1's the passageway, and the slit that begins gradual widen from open end 11 can effectively compensate along loss of pressure in the air flow pipeline direction, makes the air current along main air flow pipe 1's axis direction evenly distributed, gets into manifold 2 through slit district 10, and air vent 22 among the rethread manifold 2 flows, and then has guaranteed gas flow's among every air vent 22 even.

Example 2

An aeration apparatus comprising the aeration tube of example 1.

Example 3

A membrane bioreactor comprising a hollow fiber curtain membrane module containing an aeration device containing the aeration tube of example 1.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (10)

1. An aeration pipe is characterized in that: the air flow collecting device comprises a main air flow pipe and at least one collecting cavity surrounding the main air flow pipe, wherein one end of the main air flow pipe is an open end, the other end of the main air flow pipe is a closed end, the open end is used for introducing air flow, at least one slit area is formed in the pipe wall of the main air flow pipe, the slit area is gradually widened in the direction from the open end to the closed end, the collecting cavity is covered outside the slit area, a plurality of air holes are formed in the collecting cavity at intervals, and the air holes are opposite to the slit area.

2. The aerator tube of claim 1, wherein: the slit area is arranged along the axial direction of the main airflow pipe.

3. The aerator tube of claim 1, wherein: the number of the slit regions is the same as the number of the manifolds.

4. The aerator tube of claim 1, wherein: the manifold comprises a bottom wall and a plurality of side walls vertically connected with the bottom wall, and one ends of the side walls far away from the bottom wall are tightly connected with the outer wall of the main airflow pipe.

5. The aerator tube of claim 4, wherein: the vent hole is located on the bottom wall.

6. The aerator tube of claim 1, wherein: the vent holes are uniformly distributed along the extending direction of the slit area.

7. The aerator tube of claim 1, wherein: the vent holes are circular, and the aperture of each vent hole is the same.

8. The aerator tube of claim 1, wherein: the main airflow pipe is cylindrical.

9. An aeration device, characterized in that: an aerator pipe as claimed in any one of claims 1 to 8.

10. A membrane bioreactor, comprising: comprising an aeration device comprising an aeration tube according to any one of claims 1 to 8.

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