CN213942705U

CN213942705U - Lower membrane pipe

Info

Publication number: CN213942705U
Application number: CN202022620328.7U
Authority: CN
Inventors: 郭守君; 魏星光; 钱超恒; 卢欢; 麻丽峰
Original assignee: Suzhou Fumiao Membrane Technology Co ltd
Current assignee: Suzhou Fumiao Membrane Technology Co ltd
Priority date: 2020-11-13
Filing date: 2020-11-13
Publication date: 2021-08-13
Anticipated expiration: 2030-11-13

Abstract

The utility model discloses a film-laying pipe, which comprises a pipe body, a bottom plate which is annularly abutted against the bottom of the pipe body along the circumferential direction of the pipe body, a through hole which is arranged on the bottom plate, an aeration channel which is formed by extending the edge of the through hole to one side of the bottom plate and is positioned in the pipe body, and an aeration nozzle of which the upper end is inserted at the bottom of the aeration channel, wherein the lower end of the aeration nozzle is communicated with an aeration hole of the aeration pipe; an annular cavity for casting the bottom end part of the membrane tows is formed between the inner periphery of the tube body and the outer periphery of the aeration channel. The utility model relates to a lower membrane tube, gas can directly enter the central position of a membrane silk bundle through an aeration channel during aeration to scrub membrane silk, has better scrubbing effect on the membrane silk at the position, and can avoid the accumulation of a large amount of membrane silk surface pollutants and the too fast thickening of a filter cake layer at the position; under the condition of low aeration strength, the gas-liquid two-phase flow can achieve the ideal effect of scrubbing the membrane filaments by piston-shaped aeration, the service cycle of the membrane curtain is prolonged by more than 50%, the running water production cycle is long, and the water yield is high.

Description

Lower membrane pipe

Technical Field

The utility model relates to a lower membrane pipe.

Background

The membrane curtain aeration holes are generally positioned between the membrane tows, the membrane tows are scrubbed upwards by air flow during aeration, and the places where the air flow at the edges of the membrane tows pass are scrubbed clean. Part of the membrane tows are high in packing density, and aeration airflow is difficult to permeate to the central position of the membrane tows to scrub the membrane tows clean. The partial film yarn mud cake layer is formed too fast, the flux is reduced too fast, the running water production period is short, and the water yield and the water quality are influenced.

Disclosure of Invention

The utility model aims at providing a lower membrane tube has better effect of cleaning to membrane silk bundle central point during the aeration, can avoid the too fast bodiness on a large amount of accumulations and filter cake layer of this position department membrane silk surface pollutant.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

a membrane-laying pipe comprises a pipe body, a bottom plate, a through hole, an aeration channel and an aeration nozzle, wherein the bottom plate is circumferentially abutted to the bottom of the pipe body along the circumferential direction of the pipe body;

an annular cavity for casting the bottom end of the membrane tows is formed between the inner periphery of the tube body and the outer periphery of the aeration channel.

Preferably, the through-hole, the aeration passage and the pipe body are coaxially aligned.

Preferably, the aeration channel tapers in a direction away from the base plate.

Preferably, the upper end of the aeration passage is higher than the upper end of the pipe body.

Preferably, the aeration channel has two or more.

Preferably, the pipe body is a square pipe or a round pipe.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage: the utility model relates to a lower membrane tube, through setting up the aeration channel in it, and communicate aeration channel and aeration pipe's aeration hole through the aeration nozzle, the gas can directly get into membrane silk bundle central position through the aeration channel and scrub the membrane silk during aeration, have better scrubbing effect to the membrane silk of this position department, can avoid the too fast bodiness of a large amount of accumulation and filter cake layer of membrane silk surface pollutant of this position department; under the condition of low aeration intensity (60-70% of aeration quantity of the conventional membrane curtain structure), the gas-liquid two-phase flow can achieve the ideal effect of scrubbing membrane filaments by piston-shaped aeration, the service cycle (non-pollution blockage cycle) of the membrane curtain is prolonged by more than 50%, the running water production cycle is long, and the water yield is high.

Drawings

FIG. 1 is a schematic structural diagram of the device of the present invention;

figure 2 is the utility model discloses the mounting structure sketch map of device and membrane silk bundle.

Wherein: 1. a pipe body; 2. a base plate; 3. a through hole; 4. an aeration channel; 5. a membrane tow; 6. an annular cavity; 7. an air nozzle; 8. an aeration pipe; 9. and (4) aeration holes.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings.

Referring to fig. 1-2, the lower membrane tube includes a tube body 1, a bottom plate 2 annularly abutting against the bottom of the tube body 1 along the circumferential direction of the tube body, a through hole 3 formed in the bottom plate 2, an aeration channel 4 formed by extending the edge of the through hole 3 to one side of the bottom plate 2 and located in the tube body 1, and an aeration nozzle 7 having an upper end inserted into the bottom of the aeration channel 4, wherein the lower end of the aeration nozzle 7 is communicated with an aeration hole 9 of an aeration tube 8. The aeration pipe 8 is positioned below the lower membrane pipe.

An annular cavity 6 for casting the bottom end of the membrane strands 5 is formed between the inner peripheral portion of the tube body 1 and the outer peripheral portion of the aeration passage 4. The pipe body 1 is a square pipe or a circular pipe, and in this embodiment, referring to fig. 1, the pipe body 1 is a square pipe.

Referring to fig. 1, in the present embodiment, there is only one aeration passage 4, and the through-hole 3, the aeration passage 4 and the pipe body 1 are coaxially arranged. Namely, the aeration channel 4 is positioned at the central position of the membrane tows 5, gas can directly enter the central position of the membrane tows 5 through the aeration nozzle 7 and the aeration channel 4 during aeration to scrub membrane filaments, the membrane filaments at the position have a good scrubbing effect, and the accumulation of a large amount of pollutants on the surface of the membrane filaments at the position and the too fast thickening of a filter cake layer can be avoided; under the condition of low aeration intensity (60-70% of aeration quantity of a conventional membrane curtain structure), the gas-liquid two-phase flow can achieve the ideal effect of the piston-shaped aeration scrubbing membrane wire (an ideal piston-shaped scrubbing state is formed by combining with peripheral scrubbing air), the service cycle (non-pollution blockage cycle) of the membrane curtain is prolonged by more than 50%, the running water production cycle is long, and the water yield is high. Compared with the conventional structure membrane curtain, the operation cost is reduced by more than 30%, and the service lives of the membrane yarn and the equipment are longer.

Referring to fig. 2, in the present embodiment, the aeration channel 4 is tapered in a direction away from the base plate 2. Namely, the aeration channel 4 gradually tapers in the direction towards the membrane filament bundle 5, and the cross section area of the aeration channel 4 is gradually reduced, so that the flow velocity of gas in the aeration channel is improved, and the scrubbing effect on the membrane filaments at the central position of the membrane filament bundle 5 during aeration is further improved. In this embodiment, the upper end of the aeration passage 4 is flush with the upper end of the pipe body 1.

In embodiment 2, the upper end of the aeration channel 4 is higher than the upper end of the tube body 1, and the upper end of the aeration channel 4 is closer to the central position of the membrane tows 5, so that the scrubbing effect on the membrane filaments at the central position of the membrane tows 5 during aeration is further improved.

In example 3, the aeration channel 4 has two or more. Because partial membrane tows 5 are arranged closely and the radius of the membrane tows 5 is large, the single aeration channel 4 cannot completely scrub the interior of the membrane tows, and the membrane filaments at the center of the membrane tows 5 are scrubbed by arranging the plurality of aeration channels 4 during aeration.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A lower membrane tube, characterized in that: the aerator comprises a pipe body, a bottom plate which is annularly abutted to the bottom of the pipe body along the circumferential direction of the pipe body, a through hole which is formed in the bottom plate, an aeration channel which is formed by extending the edge of the through hole to one side of the bottom plate and is positioned in the pipe body, and an aeration nozzle of which the upper end is inserted into the bottom of the aeration channel, wherein the lower end of the aeration nozzle is communicated with an aeration hole of the aeration pipe;

2. The bottom film tube of claim 1, wherein: the through hole, the aeration channel and the pipe body are coaxially arranged.

3. The bottom film tube of claim 1, wherein: the aeration channel gradually tapers in a direction away from the bottom plate.

4. The bottom film tube of claim 1, wherein: the upper end of the aeration channel is higher than the upper end of the pipe body.

5. The bottom film tube of claim 1, wherein: the aeration channel has two or more.

6. The bottom film tube of claim 1, wherein: the pipe body is a square pipe or a round pipe.