Combined aeration curtain type EHBR membrane assembly based on sewage treatment

Abstract

The invention discloses a combined aeration curtain type EHBR membrane assembly based on sewage treatment, relates to the field of EHBR membranes, and aims to solve the problems of local sludge accumulation and high membrane pollution rate caused by non-uniform distribution of generated bubble flow, weak shearing force on the surfaces of membrane filaments and difficulty in effectively covering the whole surfaces of the membrane filaments (especially the middle and lower parts of the membrane filaments) by bubbles in the background technology. According to the scheme, the device comprises a shell and a protective grating, the shell comprises a mounting frame, an aeration mechanism is arranged in the mounting frame, and the aeration mechanism comprises two horizontal pipes, a plurality of vertical branch pipes with the two ends welded to the inner walls of the horizontal pipes respectively and a plurality of rhombic unit pipes; a plurality of inclined aeration micropores are formed in the outer wall of one side of each rhombic unit pipe. According to the invention, bubbles can be ensured to be uniformly distributed in a two-dimensional plane, so that the bubbles effectively cover the membrane silk, the shearing force on the surface of the membrane silk is enhanced, the cleaning blind area on the surface of the membrane silk is eliminated, and the membrane flux attenuation rate and the membrane pollution rate are slowed down.

Description

Technical Field

[0001] This invention relates to the field of EHBR membranes, and more particularly to a combined aeration curtain type EHBR membrane module for wastewater treatment. Background Technology

[0002] EHBR membranes are polymer membranes with highly efficient separation performance and excellent physicochemical properties. They are primarily composed of polymer materials, commonly polyamides, polycarbonates, and polyphenols. During preparation, parameters such as temperature, pressure, and solvents are controlled to manage the membrane structure and achieve the desired membrane performance. EHBR membranes possess many unique characteristics. Firstly, they exhibit excellent barrier properties. Due to their special structure and preparation method, EHBR membranes effectively block the penetration of substances such as oxygen, water vapor, and organic solvents, providing good preservation and moisture-proof effects. Secondly, EHBR membranes have… With excellent thermal stability and corrosion resistance, EHBR membranes can operate stably over a wide temperature range and are not easily corroded by chemical substances. Furthermore, EHBR membranes possess high mechanical strength and tensile properties, making them suitable for various applications. EHBR membranes have broad application prospects in multiple fields. In food packaging, they can effectively extend the shelf life of food, maintaining its quality and nutritional components. In the electronics industry, they can serve as a protective layer for electronic components, preventing corrosion from external substances. In environmental protection, EHBR membranes can be used in wastewater treatment, gas separation, and other applications.

[0003] Enhanced Hybrid Biofilm Reactor (EHBR) is a novel water treatment technology that organically integrates gas separation membrane technology and biofilm water treatment technology. The EHBR process utilizes hollow fiber aeration membranes as carriers for microbial biofilm attachment and aerates the biofilm and water. When wastewater flows around the aeration membrane with attached biofilm, pollutants in the water enter the biofilm under the influence of concentration gradient and microbial adsorption. Through biological metabolism and proliferation, the pollutants in the water are utilized by microorganisms, which assimilate the pollutants into microbial cells that are fixed on the biofilm or decompose them into inorganic metabolic products, thereby achieving the purification of the water.

[0004] Conventional aeration pipes (such as single-row straight pipes or ring pipes) are arranged on the side or bottom of the membrane curtain, resulting in uneven distribution of the bubble flow. The shear force on the membrane fiber surface is weak, and the bubbles are difficult to effectively cover the entire surface of the membrane fiber (especially the middle and lower part of the membrane fiber), leading to local accumulation of sludge and a fast membrane fouling rate. Summary of the Invention

[0005] This invention provides a combined aeration curtain EHBR membrane module for wastewater treatment, which solves the problems of uneven bubble flow distribution, weak shear force on the membrane fiber surface, and difficulty in effectively covering the entire surface of the membrane fiber (especially the middle and lower part of the membrane fiber) in the existing EHBR membrane module, resulting in local sludge accumulation and rapid membrane fouling rate.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A combined aeration curtain EHBR membrane module for wastewater treatment includes a housing and a protective grid. The housing includes a mounting frame, and an aeration mechanism is provided inside the mounting frame. The aeration mechanism includes two horizontal pipes, several vertical branch pipes with both ends welded to the inner wall of the horizontal pipes, and several diamond-shaped unit pipes. Each of the diamond-shaped unit pipes has several inclined aeration micropores on one outer wall. A filter assembly is provided at the top of the mounting frame. A water purification mechanism is provided inside the mounting frame. The water purification mechanism includes a water collection pipe with both ends connected to the inner wall of the mounting frame by flanges, a membrane curtain composed of several hollow fiber membrane filaments, and a stop bar with both ends bolted to the inner wall of the mounting frame.

[0007] Preferably, an end cap is connected to one outer wall of the mounting frame via a flange, and a concentrated water pipe is fixed on the lower outer wall of the end cap. An electromagnetic drain valve is clamped and installed on the outer wall of one end of the concentrated water pipe.

[0008] Preferably, the protective grille is bolted to the inner wall of one end of the mounting frame, and the outer wall of the protective grille has filter holes that are evenly distributed.

[0009] Preferably, the two horizontal pipes are welded to the outer walls of the two vertical branch pipes at both ends, respectively. An air inlet pipe is fixed on the inner wall of the top of the horizontal pipe, and the upper part of the air inlet pipe passes through and is fixed on the outer wall of the top of the mounting frame. A first connecting pipe is fixed on the inner wall of both ends of several rhombic unit pipes, and several first connecting pipes are respectively fixed on the inner wall of several vertical branch pipes. A second connecting pipe is fixed on the inner wall of one end of several rhombic unit pipes.

[0010] The above scheme delivers compressed air into the horizontal pipe through the intake pipe. The compressed air then circulates within the two horizontal pipes and several vertical branch pipes. Subsequently, the compressed air enters multiple diamond-shaped unit pipes and is discharged from multiple inclined aeration micro-holes, generating small, dense bubbles with initial downward momentum.

[0011] Preferably, the filter assembly includes a mounting cylinder screwed to the upper outer wall of the air intake pipe, an air filter element slidably sleeved inside the mounting cylinder, a cylinder cover connected to the top outer wall of the mounting cylinder via a sealing gasket, a threaded pipe fixed to the bottom outer wall of the cylinder cover, and an air supply pipe penetrating and fixed to the bottom outer wall of the cylinder cover, wherein the threaded pipe is screwed to the upper inner wall of the mounting cylinder.

[0012] The above method uses an air compressor to deliver compressed air into the installation cylinder, and an air filter element filters and sterilizes the compressed air to prevent bacteria in the compressed air from affecting the EHBR membrane water treatment efficiency.

[0013] Preferably, the upper part of the membrane curtain is fixed to the inner wall of the bottom of the water collection pipe with polyurethane adhesive, and the bottom end of the membrane curtain overlaps the outer wall of the top of the baffle.

[0014] Through the above scheme, tiny bubbles rise within narrow gaps. Their trajectory is affected by the surface of the membrane fibers and restricted by the confined space, forming complex eddies and shear forces. This provides an active, continuous, and uniform physical scouring of the membrane curtain, effectively preventing sludge from accumulating on the membrane surface. At the same time, the bottom fixing rod limits the position of the membrane curtain. While the bubbles rise and scouring the membrane fibers, they also provide oxygen to the biofilm attached to the surface of the membrane fibers, enabling biodegradation. The treated purified water, under the action of suction negative pressure, passes through the membrane wall from the outside of the membrane curtain into the inner cavity of the membrane curtain, and flows upward to the collection pipe for discharge.

[0015] Preferably, two connecting pipes are fixed on the upper inner walls of both sides of the mounting frame, and the bottom outer walls of the two connecting pipes are tangent to the inner walls of the bottom two ends of the water collection pipe.

[0016] Preferably, two suction pumps are bolted to the upper outer wall of one side of the end cap, and the water inlet ends of the two suction pumps are respectively fixed with conveying pipes, and the two conveying pipes are respectively connected to the outer walls of the two connecting pipes through quick connectors.

[0017] The beneficial effects of this invention are as follows: 1. The intake pipe delivers compressed air into the horizontal pipe, and then the compressed air circulates inside the two horizontal pipes and several vertical branch pipes. Subsequently, the compressed air enters multiple diamond-shaped unit pipes and is discharged from multiple inclined aeration micro-holes, generating small, dense bubbles with initial downward momentum.

[0018] 2. Tiny bubbles rise within narrow gaps, their trajectories constrained by the membrane fiber surface and the confined space, forming complex eddies and shear forces. This provides active, continuous, and uniform physical scouring of the membrane curtain, effectively preventing sludge accumulation on the membrane surface. As the bubbles rise and scour the membrane fibers, they also provide oxygen to the biofilm attached to the membrane fiber surface, facilitating biodegradation. The treated water, under negative pressure, flows from the outside of the membrane curtain through the membrane wall into the inner cavity of the membrane curtain, and then upwards to the collection pipe for discharge.

[0019] In summary, the present invention can ensure the uniform distribution of bubbles in a two-dimensional plane, enabling bubbles to effectively cover the membrane fibers, enhance the shear force on the membrane fiber surface, eliminate blind spots on the membrane fiber surface, and slow down the membrane flux decay rate and membrane fouling rate. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall main structure of a combined aeration curtain type EHBR membrane module for wastewater treatment proposed in this invention.

[0021] Figure 2 This is a schematic diagram of the main cross-sectional structure of a combined aeration curtain type EHBR membrane module for wastewater treatment proposed in this invention.

[0022] Figure 3 This is a schematic diagram of the main structure of the outer shell of a combined aeration curtain type EHBR membrane module for wastewater treatment proposed in this invention.

[0023] Figure 4 This is a schematic diagram of the main structure of the protective grid of a combined aeration curtain type EHBR membrane module for wastewater treatment proposed in this invention.

[0024] Figure 5 This is a schematic diagram of the aeration mechanism of a combined aeration curtain type EHBR membrane module for wastewater treatment proposed in this invention.

[0025] Figure 6 The present invention proposes Figure 5 Enlarged structural diagram at point A in the middle.

[0026] Figure 7 This is a schematic diagram of the main cross-sectional structure of a combined aeration curtain type EHBR membrane module for wastewater treatment proposed in this invention.

[0027] Figure 8 This is a front cross-sectional view of the water purification mechanism of a combined aeration curtain EHBR membrane module based on wastewater treatment proposed in this invention.

[0028] In the diagram: 1. Outer shell; 101. Mounting frame; 102. End cap; 103. Concentrate pipe; 2. Protective grid; 3. Aeration mechanism; 301. Horizontal pipe; 302. Air inlet pipe; 303. Vertical branch pipe; 304. Diamond-shaped unit pipe; 305. First connecting pipe; 306. Second connecting pipe; 31. Aeration micropores; 4. Filter assembly; 401. Mounting cylinder; 402. Air filter element; 403. Cylinder cover; 404. Threaded pipe; 405. Air delivery pipe; 5. Water purification mechanism; 501. Water collection pipe; 502. Membrane curtain; 503. Baffle bar; 6. Connecting pipe; 7. Suction pump; 8. Delivery pipe. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0030] Example 1, referring to Figure 1-6 A combined aerated curtain EHBR membrane module for wastewater treatment includes a housing 1 and a protective grid 2. The housing 1 includes a mounting frame 101. An end cap 102 is connected to one outer wall of the mounting frame 101 via a flange. A concentrate pipe 103 is fixed to the lower outer wall of the end cap 102. An electromagnetic drain valve is clamped to the outer wall of one end of the concentrate pipe 103. The protective grid 2 is bolted to the inner wall of one end of the mounting frame 101. The outer wall of the protective grid 2 has filter holes evenly distributed. An aeration mechanism 3 is provided inside the mounting frame 101. The aeration mechanism 3 includes two horizontal pipes 301 and several vertical branch pipes 303, the two ends of which are respectively welded to the inner wall of the horizontal pipes 301. Several rhomboid unit tubes 304 are provided with several inclined aeration microholes 31 on one outer wall of each rhomboid unit tube 304. Two horizontal tubes 301 are welded to the outer walls of the two ends of two vertical branch tubes 303 respectively. An air inlet pipe 302 is fixed on the inner wall of the top of the horizontal tube 301. The upper part of the air inlet pipe 302 passes through and is fixed on the outer wall of the top of the mounting frame 101. A first connecting pipe 305 is fixed on the inner wall of each end of several rhomboid unit tubes 304. Several first connecting pipes 305 are respectively fixed on the inner wall of several vertical branch tubes 303. A second connecting pipe 305 is fixed on the inner wall of each opposite end of several rhomboid unit tubes 304.

[0031] Example 2, refer to Figure 7 A combined aeration curtain EHBR membrane module based on wastewater treatment further includes a filter assembly 4. The filter assembly 4 includes an installation cylinder 401 screwed to the upper outer wall of the air inlet pipe 302, an air filter element 402 slidably sleeved in the installation cylinder 401, a cylinder cover 403 connected to the top outer wall of the installation cylinder 401 through a sealing gasket, a threaded pipe 404 fixed to the bottom outer wall of the cylinder cover 403, and an air supply pipe 405 penetrating and fixed to the bottom outer wall of the cylinder cover 403. The threaded pipe 404 is screwed to the upper inner wall of the installation cylinder 401.

[0032] Example 3, referring to Figure 8 A combined aeration curtain type EHBR membrane module based on sewage treatment also includes a water purification mechanism 5. The water purification mechanism 5 includes a water collection pipe 501 connected to the inner wall of the mounting frame 101 by flanges at both ends, a membrane curtain 502 composed of several hollow fiber membrane filaments, and a stop bar 503 connected to the inner wall of the mounting frame 101 by bolts at both ends. The upper part of the membrane curtain 502 is fixed to the bottom inner wall of the water collection pipe 501 by polyurethane adhesive, and the bottom end of the membrane curtain 502 overlaps the top outer wall of the stop bar 503.

[0033] Example 4, refer to Figure 1-2A combined aeration curtain EHBR membrane module based on wastewater treatment also includes two connecting pipes 6 fixed on the upper inner walls of both sides of the mounting frame 101. The bottom outer walls of the two connecting pipes 6 are tangent to the inner walls of the bottom ends of the water collection pipe 501. Two suction pumps 7 are bolted to the upper outer wall of one side of the end cap 102. The inlet ends of the two suction pumps 7 are respectively fixed with delivery pipes 8. The two delivery pipes 8 are respectively connected to the outer walls of the two connecting pipes 6 through quick connectors.

[0034] Wastewater enters from one end of the installation frame 101. The protective grid 2 filters large particulate impurities in the wastewater. The air inlet pipe 302 delivers compressed air into the horizontal pipe 301. Subsequently, the compressed air circulates inside the two horizontal pipes 301 and several vertical branch pipes 303. Then, the compressed air enters into multiple diamond-shaped unit pipes 304. The compressed air is discharged from multiple inclined aeration micropores 31, generating small, dense bubbles with initial downward momentum. The small bubbles rise in the narrow gaps, and their trajectory is affected by the interference of the membrane fiber surface and the limitation of the narrow space, forming complex eddies and shear forces. This provides active, continuous, and uniform physical flushing of the membrane curtain 502, effectively preventing sludge from accumulating on the membrane surface. While the bubbles rise and flush the membrane fibers, they also provide oxygen to the biofilm attached to the membrane fiber surface, enabling biodegradation. The treated purified water, under the suction negative pressure of the suction pump, passes through the membrane wall from the outside of the membrane curtain 502 into the inner cavity of the membrane curtain 502, and flows upward to the collection pipe 501 for discharge.

[0035] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A combined aeration curtain and EHBR membrane module based on sewage treatment, comprising a housing (1) and a protective grid (2), characterized in that, The shell (1) includes a mounting frame (101), an aeration mechanism (3) is arranged in the mounting frame (101), the aeration mechanism (3) includes two horizontal pipes (301), a plurality of vertical branch pipes (303) which are respectively welded on the inner walls of the horizontal pipes (301) and a plurality of rhombus unit pipes (304), a plurality of the rhombus unit pipes (304) are respectively provided with a plurality of aeration micro-holes (31) which are obliquely arranged on one side of the outer wall. The mounting frame (101) is provided with a filter assembly (4) on the top, The mounting frame (101) is provided with a water purification mechanism (5), the water purification mechanism (5) includes a water collecting pipe (501) which is connected to the inner walls of the mounting frame (101) through flanges at two ends, a membrane curtain (502) which is composed of a plurality of hollow fiber membrane filaments and a blocking rod (503) which is connected to the inner walls of the mounting frame (101) through bolts at two ends.

2. A combined aerated curtain and EHBR membrane module based on sewage treatment according to claim 1, characterized in that, The mounting frame (101) is provided with an end cover (102) on one side of the outer wall through flanges, and the end cover (102) is provided with a concentrated water pipe (103) on the lower part of the outer wall, and the concentrated water pipe (103) is provided with an electromagnetic sewage valve on one end of the outer wall.

3. A combined aerated curtain and EHBR membrane module based on sewage treatment according to claim 1, characterized in that, The protective grid (2) is connected to one end of the inner wall of the mounting frame (101) through bolts, and the outer wall of the protective grid (2) is provided with filter holes which are distributed at equal distances.

4. A combined aerated curtain and EHBR membrane module based on sewage treatment according to claim 1, characterized in that, Two ends of the horizontal pipe (301) are respectively welded on the outer walls of two vertical branch pipes (303), the top inner wall of the horizontal pipe (301) is provided with an air inlet pipe (302), and the upper part of the air inlet pipe (302) penetrates and is fixed to the top outer wall of the mounting frame (101), the inner walls of two ends of the rhombus unit pipe (304) are respectively provided with a first connecting pipe (305), and the first connecting pipes (305) are respectively fixed to the inner walls of the vertical branch pipes (303), the inner walls of the opposite ends of the rhombus unit pipes (304) are respectively provided with a second connecting pipe (305).

5. A combined aerated curtain and EHBR membrane module based on sewage treatment according to claim 4, characterized in that, The filter assembly (4) includes a mounting cylinder (401) which is screwed on the upper part of the outer wall of the air inlet pipe (302), an air filter element (402) which is slidably sleeved in the mounting cylinder (401), a cylinder cover (403) which is connected to the top outer wall of the mounting cylinder (401) through a sealing gasket, a threaded pipe (404) which is fixed to the bottom outer wall of the cylinder cover (403) and a gas conveying pipe (405) which penetrates and is fixed to the bottom outer wall of the cylinder cover (403), and the threaded pipe (404) is screwed on the upper part of the inner wall of the mounting cylinder (401).

6. A combined aerated curtain and EHBR membrane module based on sewage treatment according to claim 1, characterized in that, The upper part of the membrane curtain (502) is fixed to the bottom inner wall of the water collecting pipe (501) through polyurethane glue, and the bottom end of the membrane curtain (502) is overlapped on the top outer wall of the blocking rod (503).

7. A combined aerated curtain and EHBR membrane module based on sewage treatment according to claim 1, characterized in that, The upper inner walls of the two sides of the mounting frame (101) are respectively provided with two connecting pipes (6), and the bottom outer walls of the two connecting pipes (6) are respectively tangent to the bottom inner walls of the water collecting pipe (501).

8. A combined aerated curtain and EHBR membrane module based on sewage treatment according to claim 7, characterized in that, One side of the upper outer wall of the end cover (102) is provided with two suction pumps (7) through bolts, and the water inlet ends of the two suction pumps (7) are respectively provided with conveying pipes (8), and the two conveying pipes (8) are respectively connected to the outer walls of the two connecting pipes (6) through quick connectors.

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