CN-122010292-A - Reinforced membrane-hanging type hollow fiber membrane stack for MABR (media supported reactor) process

Abstract

The application relates to the technical field of sewage treatment equipment, in particular to a reinforced membrane hanging type hollow fiber membrane stack for an MABR (media supported reactor) process, which comprises a membrane shell, wherein a plurality of groups of membrane elements are arranged in the membrane shell, each membrane element consists of a plurality of hollow fiber membranes which are arranged in parallel, the upper end and the lower end of each membrane element are respectively connected with a membrane frame, the membrane frames are arranged in the membrane shell, three-dimensional netlike filler layers are arranged between adjacent hollow fiber membranes, the three-dimensional netlike filler is adopted to provide additional biological attachment carriers, so that the system can maintain higher microorganism concentration, the treatment capacity and the impact load resistance are higher, the biomass is obviously improved, the contact between bubbles and membranes, the filler and a liquid phase is more sufficient by adopting inclined aeration, the oxygen utilization rate and the pollutant degradation rate are improved, the mass transfer efficiency is optimized, and the directional transverse shearing force can more effectively control the thickness of a biological membrane on the membrane surface, reduce the membrane pollution, prolong the membrane cleaning period and the service life, and the anti-pollution performance is enhanced.

Inventors

• GAO TINGTING
• WANG YUEJUAN
• ZHOU QIAO
• MA CHENHAO
• WANG HUAN
• ZHONG QING
• LI XIAOLING
• QIU LIJUAN
• QU WEI
• Zuo Zhaosheng

Assignees

• 江苏瑞达环保科技股份有限公司

Dates

Publication Date

20260512

Application Date

20260309

Claims (10)

1. 1. A reinforced film-hanging type hollow fiber membrane stack for an MABR process comprises a membrane shell (1) and is characterized in that a plurality of groups of membrane elements (2) are arranged in the membrane shell (1), each membrane element (2) is composed of a plurality of hollow fiber membranes (21) which are arranged in parallel, the upper end and the lower end of each membrane element are respectively connected with a membrane frame (22), the membrane frames (22) are arranged in the membrane shell (1), and three-dimensional net-shaped filler layers (3) are arranged between every two adjacent hollow fiber membranes (21).
2. 2. The reinforced membrane-hanging type hollow fiber membrane stack for the MABR process, as claimed in claim 1, is characterized in that an aeration mechanism (4) is arranged at the bottom of the membrane shell (1), the aeration mechanism (4) comprises an aeration pipe (41) and a plurality of aeration heads (42), and the aeration heads (42) are all obliquely upwards arranged.
3. 3. The reinforced membrane-hanging hollow fiber membrane stack for MABR process according to claim 1, wherein the material of the three-dimensional netlike filler layer (3) is one of polyethylene, polypropylene, polyamide or polyurethane.
4. 4. A reinforced membrane-suspended hollow fiber membrane stack for MABR process according to claim 3, wherein the edges of said three-dimensional reticulated filler layer (3) are attached to the membrane frame (22) by straps or snaps.
5. 5. The reinforced membrane-hanging hollow fiber membrane stack for an MABR process according to claim 1, wherein the three-dimensional net-shaped filler layer (3) is one of elastic three-dimensional net-shaped filler, pall ring filler or volcanic fiber woven filler.
6. 6. A reinforced membrane-suspended hollow fiber membrane stack for MABR process according to claim 5, wherein said three-dimensional network filler layer (3) is filled in the gaps between hollow fiber membranes (21).
7. 7. A reinforced membrane-suspended hollow fiber membrane stack for MABR process according to claim 2, wherein the angle between the opening direction of said aeration head (42) and the hollow fiber membrane (21) is in the range of 15 to 75 degrees.
8. 8. The membrane-hanging hollow fiber membrane stack for MABR process according to claim 7, wherein an included angle between the opening direction of the aeration head (42) and the hollow fiber membrane (21) is in the range of 30 degrees to 60 degrees.
9. 9. A reinforced membrane-hanging hollow fiber membrane stack for MABR process according to claim 1, wherein the hollow fiber membranes (21) are vertically arranged.
10. 10. A reinforced membrane-hanging hollow fiber membrane stack for MABR process according to claim 1, wherein the membrane shell (1) is cylindrical or square.

Description

Reinforced membrane-hanging type hollow fiber membrane stack for MABR (media supported reactor) process Technical Field The invention relates to the technical field of sewage treatment equipment, in particular to a reinforced membrane-hanging type hollow fiber membrane stack for an MABR process. Background The MABR technology is an efficient low-energy-consumption sewage treatment technology, the core component of the technology is a hollow fiber membrane stack, in the MABR technology, oxygen diffuses to the outer side of the membrane through micropores of the hollow fiber membrane, an aerobic biological membrane is formed on the surface of the membrane, sewage flows on the outer side of the membrane, and pollutants are degraded by the biological membrane. The oxygen utilization rate of the bubble-free aeration mode is extremely high. However, the existing MABR membrane stacks have certain disadvantages: (1) The biological film is mainly attached to the surface of a limited film, the total biomass is limited, and the further improvement of the treatment load is limited; (2) In order to control membrane pollution, an aeration system is arranged at the bottom of a membrane stack to scrub, but the shearing force generated by the traditional vertical upward aeration mode is unevenly distributed, the scrubbing effect on the middle area of a membrane is poor, the bubble path is short, and the overall mixed mass transfer effect of the reactor is limited. Therefore, there is an urgent need for an MABR membrane stack structure that can increase the amount of biofilm formation while optimizing the aeration scrubbing effect to enhance overall performance. Disclosure of Invention The invention aims to overcome the defects and shortcomings of the prior art and provide a reinforced membrane-hanging type hollow fiber membrane stack for an MABR process, which is reasonable in design and can solve the defects. The membrane element consists of a plurality of hollow fiber membranes which are arranged in parallel, the upper end and the lower end of the membrane element are respectively connected with a membrane frame, the membrane frame is arranged in the membrane shell, and a three-dimensional netlike filler layer is arranged between the adjacent hollow fiber membranes. Preferably, the bottom of the membrane shell is provided with an aeration mechanism, the aeration mechanism comprises an aeration pipe and a plurality of aeration heads, and the aeration heads are obliquely upwards arranged. Preferably, the three-dimensional net-shaped filler layer is made of one of polyethylene, polypropylene, polyamide or polyurethane. Preferably, the edges of the three-dimensional mesh filler layer are attached to the diaphragm frame by straps or snaps. Preferably, the three-dimensional net filler layer is one of elastic three-dimensional net filler, pall ring filler or volcanic fiber woven filler. Preferably, the three-dimensional net-shaped filler layer is filled in the gaps between the hollow fiber membranes. Preferably, the hollow fiber membranes are all arranged vertically. Preferably, the included angle between the opening direction of the aeration head and the hollow fiber membrane ranges from 15 degrees to 75 degrees. Preferably, the included angle between the opening direction of the aeration head and the hollow fiber membrane ranges from 30 degrees to 60 degrees. Preferably, the membrane shell is cylindrical or square. After adopting the structure, the invention has the beneficial effects that: 1. The application provides additional biological attachment carrier by adopting the three-dimensional net-shaped filler, so that the system can maintain higher microorganism concentration, has stronger processing capacity and impact load resistance capacity, and remarkably improves biomass. 2. The application adopts inclined aeration to make the bubbles contact with the membrane, the filler and the liquid phase more fully, improves the oxygen utilization rate and the pollutant degradation rate, and optimizes the mass transfer efficiency. 3. In the application, the directional transverse shearing force can more effectively control the thickness of the biological film on the surface of the film, reduce the film pollution, prolong the cleaning period and the service life of the film and strengthen the anti-pollution performance. 4. The application has simple structure, easy implementation, low transformation cost and easy popularization and application in the existing products or engineering, and only adds the filler and adjusts the aeration direction on the existing membrane stack structure. Drawings FIG. 1 is a schematic view of the overall structure of a membrane stack according to the present invention; FIG. 2 is a partial side view of a membrane element of the present invention; FIG. 3 is a schematic top view of the structure of the aerator pipe according to the invention; FIG. 4 is a schematic view of the angle between the aeration dire