CN213446419U

CN213446419U - Membrane group device for reciprocating MBR system

Info

Publication number: CN213446419U
Application number: CN202021507873.9U
Authority: CN
Inventors: 于玉彬; 王洪涛; 赵玮; 李绍伟
Original assignee: Suzhou Suke Environmental Protection Science & Technology Co ltd
Current assignee: Suzhou Suke Environmental Protection Science & Technology Co ltd
Priority date: 2020-07-27
Filing date: 2020-07-27
Publication date: 2021-06-15
Anticipated expiration: 2030-07-27

Abstract

A membrane group device for a reciprocating MBR system belongs to the technical field of sewage treatment. The membrane module device for the reciprocating MBR system comprises a reciprocating frame, a rail and a membrane module device, wherein the reciprocating frame is erected on the rail, and the membrane module device is fixed on the reciprocating frame; the membrane group device comprises a membrane group device framework and a plurality of membranes, wherein the membrane group device framework comprises upper water collection square steel, lower water collection square steel, a membrane upper end total water outlet and a membrane lower end total water outlet; the bottom of the membrane module frame is provided with a plurality of crossbeams, and each crossbeam is provided with a plurality of mud stirring propelling plates. The utility model discloses reduce the branch pipe that catchments of diaphragm, reduced the upstream face resistance to strengthen the water conservancy shearing condition on diaphragm surface, can effectively control the membrane pollution.

Description

Membrane group device for reciprocating MBR system

Technical Field

The utility model relates to a technique in the sewage treatment field specifically is a membrane group ware for reciprocating type MBR system.

Background

MBR (membrane bioreactor) is a novel sewage treatment process which combines a biological treatment unit and a membrane separation unit instead of the secondary sedimentation tank function in the traditional sewage treatment process. The MBR technology has the advantages of high treatment efficiency, excellent and stable effluent water and small occupied area, and simultaneously traps microorganisms in water in the membrane unit pool to improve the treatment capacity of a biochemical system. The development and perfection of MBR technology has been in history for 50 years so far, and has been applied to the market on a large scale, and the market share is increased year by year, and the MBR technology has become one of the main processes in municipal domestic sewage and industrial wastewater treatment processes.

At present, the most common MBR pollution control technology in the market mainly improves the hydraulic shearing force on the membrane surface, lightens concentration polarization, delays the formation of a filter cake layer on the membrane surface and achieves the aim of controlling membrane pollution by high aeration purging. However, the high aeration causes high running energy consumption of the MBR, the water treatment cost is increased, the cost is always high, meanwhile, the continuous aeration in the running process causes hair to be accumulated at the root of the membrane filaments, the continuous accumulation can block a hydraulic circulation channel between the membrane sheets, the membrane pollution is aggravated, the membrane pollution aggravation is delayed by regularly carrying out online maintenance and cleaning, the membrane module is cleaned offline to remove the substance control membrane pollution accumulated at the root of the membrane filaments, and a large amount of labor cost and time are consumed. In recent years, the reciprocating MBR technology can not only reduce energy consumption, but also effectively control membrane pollution. The principle of the reciprocating MBR is to provide shear force on the membrane surface to control membrane fouling using a mechanical motion reciprocating type instead of air sweep to control membrane fouling. The conventional reciprocating MBR technical research is mainly carried out by combining the conventional aeration MBR membrane group device with a reciprocating frame. The existing membrane group device is characterized in that each membrane is provided with a water production branch pipe (for example, 25 or 50 water production branch pipes with 50 membranes), and then the water production branch pipes are collected to a water production main pipe in a centralized mode, so that the effect of reducing pollution of the control membrane by a hydraulic flow passage in the operation process is influenced, and the installation is complex. Meanwhile, the membrane tank of the reciprocating MBR system is not aerated, so that the sludge sedimentation and stratification are serious, the sludge concentration at the bottom of the membrane tank is too high, and the membrane silk pollution of the lower membrane component is aggravated.

In order to solve the above problems existing in the prior art, the utility model discloses come from this.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the aforesaid to prior art exists is not enough, provides a membrane group ware for reciprocating type MBR system, can strengthen the hydraulic shear condition on diaphragm surface, and effective control membrane pollutes.

The utility model discloses a: the film combining device comprises a reciprocating type frame, a rail and a film combining device, wherein the reciprocating type frame is erected on the rail, and the film combining device is fixed on the reciprocating type frame;

the membrane group device comprises a membrane group device framework and a plurality of membranes, wherein the membrane group device framework comprises upper water collection square steel, lower water collection square steel, a membrane upper end total water outlet and a membrane lower end total water outlet;

the bottom of the membrane module frame is provided with a plurality of crossbeams, and each crossbeam is provided with a plurality of mud stirring propelling plates.

Preferably, corresponding to the diaphragm, the frame of the membrane module device is provided with diaphragm limiting clamping grooves at the top and the bottom, and the upper end diaphragm box and the lower end diaphragm box on the diaphragm are limited.

Preferably, corresponding to the diaphragm, the membrane module frame is provided with limiting angle steel at the top and the bottom to limit one end, far away from the water outlet, of the diaphragm.

Preferably, stir mud propulsion plate and rotate the setting on the fixing base through the pivot, fixing base and membrane group ware frame bottom crossbeam fixed connection.

Technical effects

Compared with the prior art, the utility model discloses following technological effect has:

1) the aeration MBR group device membrane water collecting branch pipe is removed, a hydraulic flow channel in a reciprocating system is enhanced, the resistance of the upstream surface is reduced, the hydraulic shearing condition of the membrane surface is enhanced, membrane pollution can be effectively controlled, no hair accumulation is generated at the root of the membrane component, the membrane pollution resisting effect is improved, the maintenance and cleaning frequency is reduced, and the off-line cleaning frequency is reduced; and aeration is not carried out, so that the operation energy consumption is reduced, the membrane unit pool is in an anoxic state, and the total nitrogen effluent index is further reduced;

2) a sludge stirring pushing plate is added to enhance the stirring strength of the sludge at the bottom, and simultaneously the sludge at the bottom is pushed to one end of the membrane pool along the movement direction of the membrane group device to carry out high-sludge concentration backflow and discharge, so that the microbial biomass of the sludge backflow is improved, the removal of water quality indexes is enhanced, and the sludge backflow and discharge concentration is improved; on the basis of not changing the structure of the membrane tank, the problem of serious sludge stratification is solved;

3) the difficulty of diaphragm installation and dismantlement is reduced, investment cost and running cost are reduced.

Drawings

FIG. 1 is a schematic view of the overall structure in example 1;

FIG. 2 is an enlarged view of the structure at I in FIG. 1;

FIG. 3 is a schematic view of a diaphragm assembly;

FIG. 4 is a schematic view of the reciprocating movement of the membrane module;

FIG. 5a is a schematic view of the position of the sludge stirring and pushing plate when the membrane module is moved to the left in FIG. 4;

FIG. 5b is a diagram showing the position of the sludge stirring and pushing plate when the membrane module is moved to the right in FIG. 4;

in the figure: reciprocating type frame 1, track 2, membrane group ware frame 3, go up the square steel that catchments 4, the total delivery port of upper end 5, the square steel that catchments 6, the total delivery port of lower extreme 7, crossbeam 8, spacing draw-in groove 9, spacing angle steel 10, stir mud propulsion board 11, diaphragm 12, fixing base 13.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Example 1

As shown in fig. 1 and 2, the present embodiment includes: reciprocating frame 1, track 2 and membrane module ware, reciprocating frame 1 erects on track 2, and the membrane module ware is fixed on reciprocating frame 1.

The membrane module device comprises a membrane module device frame 3 and a plurality of membranes 12, wherein the membrane module device frame 3 comprises upper water-collecting square steel 4, lower water-collecting square steel 6, a membrane upper end total water outlet 5 and a membrane lower end total water outlet 7; the diaphragm 12 is provided with an upper water producing end and a lower water producing end, the upper water producing end is connected with the upper water collecting square steel 4, and the lower water producing end is connected with the lower water collecting square steel 6, as shown in fig. 3; the membrane upper end total water outlet 5 is communicated with the upper water collecting square steel 4, the membrane lower end total water outlet 7 is communicated with the lower water collecting square steel 6, and the membrane upper end total water outlet 5 and the membrane lower end total water outlet 7 are both arranged at the top of the membrane group device. Make diaphragm produce water and get into water collection square steel 4 and water collection square steel 6 down through the suction pump, discharge from diaphragm upper end and lower extreme total delivery port again, and water collection square steel has reduced the water collection branch pipe of diaphragm as a part of membrane group ware frame 3, has strengthened the water conservancy runner, reduces upstream face resistance, improves the effect of controlling the membrane pollution. The membrane filaments are preferably hollow fiber membrane filaments made of PTFE.

Corresponding to the diaphragm, the frame of the diaphragm assembly device is provided with diaphragm limiting clamping grooves at the top and the bottom, and the upper end diaphragm box and the lower end diaphragm box on the diaphragm are limited.

Corresponding to the diaphragm, the membrane module frame is provided with a limiting angle steel at the top and the bottom, and the end, far away from the water outlet, of the diaphragm is limited. Preferably, every 4 diaphragms configuration 2 spacing angle steel, one is upper and lower, prevents that the diaphragm is not hard up in reciprocating motion process, causes the diaphragm to produce the water end damaged.

As shown in fig. 4, 5a and 5b, the bottom of the membrane module frame 3 is provided with a plurality of beams 8, each beam is provided with a fixing seat 13, the fixing seat 13 is provided with a mud stirring and pushing plate 11 through a rotating shaft, and the fixing seat is correspondingly provided with a barrier strip for the mud stirring and pushing plate 11. When the reciprocating frame 1 moves leftwards on the track 2, the maximum rotation of the mud stirring pushing plate 11 can reach 60 degrees under the restriction of resistance and a retaining strip of the fixed seat 13, so that the mud is settled to the bottom of the membrane pool; when the sludge stirring pushing plate moves rightwards, the sludge stirring pushing plate 11 rotates to be in a vertical state and is blocked by the barrier strips, sludge at the bottom of sedimentation is stirred and pushed to the right end of the membrane group device frame 3, backflow with high sludge concentration is carried out, the amount of backflow microorganisms is increased, the processing capacity of a biochemical system is improved, and the sewage treatment index is reduced. The mud stirring propelling plate is made of stainless steel or plastic. Each beam 8 can be provided with 5-8 mud stirring propelling plates.

The reciprocating frame 1 is driven by a motor, the motor drives a transmission part of a crank connecting rod or a crankshaft connecting rod to move, the reciprocating frequency and the reciprocating distance of the reciprocating frame are adjusted by changing the transmission frequency and the amplitude of a crank or a crankshaft, so that the reciprocating frame 1 performs sinusoidal displacement movement on the track 2, the inertia force provided for the membrane 12 is enhanced, the hydraulic shearing force on the surface of the membrane is enhanced, the membrane pollution is controlled, and meanwhile, the mud stirring propulsion plate 11 swings between 0-60 degrees. Preferably, the transmission frequency is 0.45-0.65 Hz, and the amplitude is 50-65 mm.

In the prior art, the membrane operation flux is maintained at 18-25 LMH, and the membrane operation flux can be increased to 23-35 LMH or even higher; the membrane system of the embodiment operates, and the sludge backflow flow is 2-3 times of the membrane water production flow; the sludge concentration can be controlled to be 8000-10000 mg/L, and the SVI (sludge volume index) value is controlled to be 65-80.

It is to be emphasized that: the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form, and any simple modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.

Claims

1. The membrane combiner for the reciprocating MBR system is characterized by comprising a reciprocating frame, a rail and a membrane combiner, wherein the reciprocating frame is erected on the rail, and the membrane combiner is fixed on the reciprocating frame;

2. The membrane module for a reciprocating MBR system of claim 1, wherein the membrane module frame is provided with membrane limiting slots at the top and bottom for limiting the upper and lower end membrane cartridges on the membrane, corresponding to the membranes.

3. The membrane module for a reciprocating MBR system as defined in claim 1 or claim 2, wherein the membrane module frame is provided with a limiting angle at the top and bottom for limiting the end of the membrane remote from the water outlet.

4. The membrane module for the reciprocating MBR system as set forth in claim 1, wherein the sludge stirring pushing plate is rotatably disposed on a fixed base through a rotating shaft, and the fixed base is fixedly connected with a beam at the bottom of the frame of the membrane module.