Composite membrane column for wastewater treatment

Abstract

The utility model discloses a composite membrane column for wastewater treatment, and relates to the field of wastewater treatment, the composite membrane column comprises a plurality of outer-layer composite membrane columns and inner-layer composite membrane columns which are used for performing double permeation treatment on wastewater, and the inner-layer composite membrane columns are embedded and moved in the outer-layer composite membrane columns; the inner-layer composite membrane column is arranged on the outer-layer composite membrane column, a settling pond for treating and settling sewage is arranged at the position close to the outer-layer composite membrane column, the outer-layer composite membrane column and the inner-layer composite membrane column are arranged in the settling pond, and a filtering pond for pre-filtering wastewater is arranged at the top of the settling pond. Wastewater is separated and purified through permeation and filtration of multiple layers of membrane columns, meanwhile, flowing of wastewater separation and filtration is accelerated through external force, the ultrafiltration rate of wastewater in the composite membrane columns is increased, and the purification effect of wastewater treatment is improved.

Description

Technical Field

[0001] The utility model relates to the field of wastewater treatment, in particular to a composite membrane column for wastewater treatment. Background Art

[0002] Sewage treatment and recycling are important ways for the world to cope with the water resource crisis and control water pollution. Due to the advantages of good effluent quality, high solid-liquid separation efficiency, and small floor area, the membrane sewage treatment technology has become one of the mainstream technologies for sewage treatment and recycling.

[0003] Industrial wastewater usually contains various hydrophobic organic pollutants and surfactants. During the process of using traditional hydrophobic microporous membranes for membrane distillation to treat industrial wastewater, these pollutants are likely to deposit on the membrane surface, causing membrane fouling and membrane wetting, resulting in low efficiency or even failure of the membrane distillation process. The hydrophilic / hydrophobic composite membrane is an asymmetric membrane material with a hydrophilic surface layer and a hydrophobic bottom layer. It can slow down the adsorption and accumulation of pollutants by forming a hydration layer on the membrane surface, while retaining the high rejection rate of the hydrophobic substrate membrane for pollutants. When used in the membrane distillation process, it can effectively enhance the effect of treating complex industrial wastewater.

[0004] Membrane materials are the core of the membrane sewage treatment process and have an important impact on sewage treatment effect, process economic performance, etc. For microfiltration and ultrafiltration (MF, UF) membranes, membrane materials with excellent anti-fouling performance and long service life are the focus of research. Especially when the membrane preparation process is relatively mature and the membrane mechanical strength has been effectively solved, the anti-organic fouling, anti-biological fouling, and long-term operation stability of membrane materials are the focus of attention.

[0005] In the fields of sewage treatment and water resource reuse, MBR, also known as membrane bioreactor, is a new water treatment technology combining the activated sludge method and membrane separation technology. There are many types of membranes. Classified by separation mechanism, there are reaction membranes, ion exchange membranes, osmotic membranes, etc.; classified by the nature of the membrane, there are natural membranes and synthetic membranes; classified by the structural type of the membrane, there are flat type, tubular type, spiral type, and hollow fiber type, etc.

[0006] Currently, tubular membranes are used to separate and treat wastewater to achieve the effect of purifying wastewater. However, the current internal wastewater treatment of tubular membranes is static separation, waiting for solutes or other impurities in the wastewater to pass through the tubular membrane for filtration, which takes a long time. Moreover, the single-layer tubular membrane is not thorough enough in treating wastewater penetration and has poor efficiency. This application sets up a composite membrane column to treat wastewater, separates and purifies the wastewater through multi-layer membrane column penetration filtration, and at the same time accelerates the flow of wastewater separation and filtration through external force, improves the ultrafiltration rate of wastewater inside the composite membrane column, and improves the purification effect of wastewater treatment. Summary of the Utility Model

[0007] The purpose of the present utility model is to provide a composite membrane column for wastewater treatment to solve the problems in the prior art.

[0008] To achieve the above object, the present utility model provides the following technical solutions:

[0009] A composite membrane column for wastewater treatment, the composite membrane column includes a plurality of outer composite membrane columns and inner composite membrane columns for double osmosis treatment of wastewater. The inner composite membrane column is embedded and movable inside the outer composite membrane column. A sedimentation tank for treating and precipitating sewage is provided near the outer composite membrane column. The outer composite membrane column and the inner composite membrane column are arranged inside the sedimentation tank. A filtration tank for pre-filtering wastewater is provided at the top of the sedimentation tank. A diversion component for diverting the wastewater to the inside of the outer composite membrane column and the inner composite membrane column is provided at the bottom of the filtration tank.

[0010] By adopting the above technical solutions: The outer composite membrane column and the inner composite membrane column can simultaneously perform osmotic separation on the wastewater, strengthen the wastewater treatment and purification ability through the internal composite membrane column, perform secondary filtration and precipitation on the wastewater after separation and osmosis through the sedimentation tank, and can perform repeated purification treatment on the wastewater. The filtration tank can pre-filter the wastewater, and the pre-filtered wastewater is osmotic purified through the inner and outer composite membrane columns to prevent large impurities from entering the outer composite membrane column and the inner composite membrane column.

[0011] Further setting: The inner composite membrane column includes a central membrane column for diverting the wastewater and double-sided osmosis blocks. The double-sided osmosis blocks are arranged on both sides of the central membrane column and are integrally connected to the central membrane column. A plurality of osmosis holes for filtering and osmosis of the wastewater diverted by the inner composite membrane column are provided on both sides of the double-sided osmosis blocks. A notch adapted to the sizes of the central membrane column and the double-sided osmosis blocks is provided inside the outer composite membrane column. The inner composite membrane column is movably connected inside the notch. A plurality of osmosis holes for repeated filtration and osmosis of the wastewater are provided inside the outer composite membrane column.

[0012] By adopting the above technical solutions: The central membrane column can divert the filtered wastewater for separation and purification. The wastewater is gradually separated and osmosed into the inside of the outer composite membrane column through the double-sided osmosis blocks for secondary osmosis purification, so as to purify the wastewater. By providing a notch inside the outer composite membrane column, the sizes of the central membrane column and the double-sided osmosis blocks can be adapted for embedding, so that the outer composite membrane column and the inner composite membrane column simultaneously perform osmotic separation on the wastewater through the osmosis holes.

[0013] Further settings: The diversion component includes a diversion pipe for diverting the wastewater inside the filtration tank to the inside of the inner composite membrane column. The diversion pipe is in the shape of a frustum of a cone, and both ends of the diversion pipe are embedded inside the filtration tank and the inner composite membrane column respectively. A telescopic lifting column for driving the inner composite membrane column to lift is provided at the position of the filtration tank close to the inner composite membrane column. Traction blocks for lifting and pulling the inner composite membrane column are provided on both sides of the inner composite membrane column. The traction blocks are perpendicularly connected to the telescopic lifting column, and a telescopic cylinder is provided inside the telescopic lifting column.

[0014] By adopting the above technical solutions: The diversion pipe can divert the wastewater inside the filtration tank to the central membrane column inside the inner composite membrane column for separation and purification. The telescopic lifting column can drive the traction blocks on both sides of the inner composite membrane column to lift, so that the inner composite membrane column can be lifted. By the action of external force, the wastewater flow inside the outer composite membrane column and the inner composite membrane column is accelerated, thereby accelerating the separation and filtration of the wastewater. By lifting the inner composite membrane column, it is convenient to observe the residual impurities in the outer composite membrane column and the inner composite membrane column, so as to perform real-time cleaning.

[0015] Further settings: The filtration tank is in the shape of a frustum of a cone. A middle pre-filter plate is provided inside the filtration tank. A diversion pipe for diverting the wastewater is provided at the top of the filtration tank. Support frames for supporting and fixing the filtration tank are provided on both sides of the filtration tank.

[0016] By adopting the above technical solutions: The filtration tank can pre-filter the wastewater. The pre-filtration is carried out through the middle pre-filter plate. Being set in the shape of a frustum of a cone can better introduce the filtered wastewater into the diversion pipe for the next step of separation and purification.

[0017] Further settings: A sedimentation tank for sedimentation after the wastewater is filtered and infiltrated is provided at the bottom of the sedimentation pond. A filter plate for secondary filtration of the wastewater is provided inside the sedimentation tank. A liquid level sensor for sensing the liquid level of the wastewater is provided inside the sedimentation tank.

[0018] By adopting the above technical solutions: The sedimentation tank can sediment the wastewater after filtration and infiltration. The secondary filtration is carried out through the filter plate. The liquid level sensor can sense the liquid level of the wastewater inside the sedimentation tank.

[0019] Further settings: A fixing block for fixing the outer composite membrane column is provided at the position of the sedimentation pond close to the outer composite membrane column. The fixing block is detachably connected to the sedimentation pond. A number of clamps for clamping the outer composite membrane column are provided on the fixing block.

[0020] By adopting the above technical solutions: Connecting the clamps on the fixing block can fix a number of outer composite membrane columns inside the sedimentation pond.

[0021] Compared with the prior art, the beneficial effects of the present utility model are as follows: It aims to set up a composite membrane column to treat wastewater. The wastewater is separated and purified through the osmotic filtration of multiple membrane columns. At the same time, the flow of wastewater separation and filtration is accelerated by external force, improving the ultrafiltration rate of wastewater inside the composite membrane column and enhancing the purification effect of wastewater treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to specific embodiments in conjunction with the accompanying drawings.

[0023] Figure 1 FIG. is a schematic diagram of the external structure of a composite membrane column for wastewater treatment according to the present utility model;

[0024] Figure 2 FIG. is an overall cross-sectional view of a composite membrane column for wastewater treatment according to the present utility model;

[0025] Figure 3 FIG. is a partial cross-sectional view of a composite membrane column for wastewater treatment according to the present utility model.

[0026] In the figures, 1, outer composite membrane column; 2, inner composite membrane column; 21, central membrane column; 22, two-way osmotic block; 3, sedimentation tank; 4, fixing block; 5, clamp; 6, filtration tank; 7, drainage pipe; 8, support frame; 9, diversion pipe; 10, telescopic lifting column; 11, sedimentation trough; 12, middle pre-filter plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] Please refer to Figures 1 to 3 , in the embodiments of the present utility model, a composite membrane column for wastewater treatment, the composite membrane column includes a plurality of outer composite membrane columns 1 and inner composite membrane columns 2 for double osmotic treatment of wastewater. The inner composite membrane column 2 is embedded and movable inside the outer composite membrane column 1. A sedimentation tank 3 for treating and precipitating sewage is arranged near the outer composite membrane column 1. The outer composite membrane column 1 and the inner composite membrane column 2 are arranged inside the sedimentation tank 3. The outer composite membrane column 1 and the inner composite membrane column 2 can simultaneously perform osmotic separation on the wastewater, strengthen the wastewater treatment and purification ability through the internal composite membrane column, and can perform secondary filtration and precipitation on the separated and permeated wastewater through the setting of the sedimentation tank 3, enabling repeated purification treatment of the wastewater;

[0029] The inner composite membrane column 2 includes a central membrane column 21 for guiding and treating wastewater and a bidirectional osmotic block 22. The bidirectional osmotic block 22 is arranged on both sides of the central membrane column 21 and is integrally connected to the central membrane column 21. A number of osmotic holes are provided on both sides of the bidirectional osmotic block 22 for filtering and osmotic treatment of the wastewater guided by the inner composite membrane column 2. A notch adapted to the sizes of the central membrane column 21 and the bidirectional osmotic block 22 is provided inside the outer composite membrane column 1. The inner composite membrane column 2 is movably connected inside the notch. A number of osmotic holes for repeatedly filtering and osmotic treating the wastewater are provided inside the outer composite membrane column 1. A fixing block 4 for fixing the outer composite membrane column 1 is provided at a position of the sedimentation tank 3 close to the outer composite membrane column 1. The fixing block 4 is detachably connected to the sedimentation tank 3. A number of clamps 5 for clamping the outer composite membrane column 1 are provided on the fixing block 4. Connecting the clamps 5 on the fixing block 4 can fix a number of outer composite membrane columns 1 inside the sedimentation tank 3.

[0030] The central membrane column 21 can guide the filtered wastewater for separation and purification. The wastewater is gradually separated and osmotic into the inside of the outer composite membrane column 1 through the bidirectional osmotic block 22 for secondary osmotic purification, so as to purify the wastewater. By providing a notch inside the outer composite membrane column 1, the sizes of the central membrane column 21 and the bidirectional osmotic block 22 can be adapted for embedding, so that the outer composite membrane column 1 and the inner composite membrane column 2 can simultaneously perform osmotic separation of the wastewater through the osmotic holes.

[0031] A filter tank 6 for pre-filtering the wastewater is provided at the top of the sedimentation tank 3. Setting the filter tank 6 can pre-filter the wastewater. The pre-filtered wastewater is osmotic purified through the inner and outer composite membrane columns, avoiding larger impurities from entering the outer composite membrane column 1 and the inner composite membrane column 2. The filter tank 6 is in the shape of a conical frustum. A middle pre-filtering plate 12 is provided inside the filter tank 6. A diversion pipe 7 for diverting the wastewater is provided at the top of the filter tank 6. Support frames 8 for supporting and fixing the filter tank 6 are provided on both sides of the filter tank 6.

[0032] The filter tank 6 can pre-filter the wastewater. The pre-filtration is carried out through the middle pre-filtering plate 12. Being in the shape of a conical frustum can better guide the filtered wastewater into the diversion pipe 9 for the next separation and purification.

[0033] A diversion assembly for diverting the wastewater to the inside of the outer composite membrane column 1 and the inner composite membrane column 2 is provided at the bottom of the filter tank 6.

[0034] The diversion assembly includes a diversion pipe 9 for diverting the wastewater inside the filtration tank 6 into the inner composite membrane column 2. The diversion pipe 9 is in the shape of a frustum of a cone, and both ends of the diversion pipe 9 are embedded inside the filtration tank 6 and the inner composite membrane column 2 respectively. At the position where the filtration tank 6 is close to the inner composite membrane column 2, there is a telescopic lifting column 10 for driving the inner composite membrane column 2 to lift and lower. On both sides of the inner composite membrane column 2, there are traction blocks for lifting and pulling the inner composite membrane column 2. The traction blocks are vertically connected to the telescopic lifting column 10, and a telescopic cylinder is arranged inside the telescopic lifting column 10.

[0035] The diversion pipe 9 can divert the wastewater inside the filtration tank 6 into the central membrane column 21 of the inner composite membrane column 2 for separation and purification. Setting the telescopic lifting column 10 can drive the traction blocks on both sides of the inner composite membrane column 2 to lift and lower, so that the inner composite membrane column 2 can lift and lower. By external force, the wastewater flow inside the outer composite membrane column 1 and the inner composite membrane column 2 is accelerated, thus accelerating the separation and filtration of the wastewater. By lifting and lowering the inner composite membrane column 2, it is convenient to observe the remaining impurities in the outer composite membrane column 1 and the inner composite membrane column 2 for real-time cleaning.

[0036] At the bottom of the sedimentation tank 3, there is a sedimentation tank 11 for sedimentation after the wastewater is filtered and permeated. Inside the sedimentation tank 11, there is a filter plate for secondary filtration of the wastewater, and a liquid level sensor for sensing the liquid level of the wastewater is arranged inside the sedimentation tank 11.

[0037] The sedimentation tank 11 can sediment the wastewater after filtration and permeation treatment, and perform secondary filtration through the filter plate. The liquid level sensor can sense the liquid level of the wastewater inside the sedimentation tank 11.

[0038] The working principle of the present utility model is as follows: The operator diverts the wastewater to be treated into the filtration tank 6 through the diversion pipe 7, and pre-filters it through the middle pre-filter plate 12. Then, the filtered wastewater is introduced into the diversion pipe 9, and the wastewater is introduced into the central membrane column 21 through the diversion pipe 9. For the wastewater after diversion and filtration, separation and purification are carried out. The wastewater is gradually separated and permeated into the outer composite membrane column 1 through the bidirectional permeation block 22 for secondary permeation and purification, so as to purify the wastewater. The telescopic cylinder is started to drive the telescopic lifting column 10 to lift and lower, thereby driving the traction blocks on both sides of the inner composite membrane column 2 to lift and lower, so that the inner composite membrane column 2 can lift and lower. By external force, the wastewater flow inside the outer composite membrane column 1 and the inner composite membrane column 2 is accelerated, thus accelerating the separation and filtration of the wastewater. By lifting and lowering the inner composite membrane column 2, it is convenient to observe the remaining impurities in the outer composite membrane column 1 and the inner composite membrane column 2 for real-time cleaning;

[0039] After the outer composite membrane column 1 and the inner composite membrane column 2 simultaneously carry out the separation and purification treatment on the wastewater, it flows into the sedimentation tank 11 inside the sedimentation pond 3. The sedimentation tank 11 conducts sedimentation after filtering and permeating the wastewater, and completes the purification treatment of the wastewater through repeated filtration and sedimentation by the filter plate.

[0040] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A composite membrane column for wastewater treatment, characterized in that: The composite membrane column includes a number of outer composite membrane columns (1) and inner composite membrane columns (2) for dual osmosis treatment of wastewater. The inner composite membrane column (2) is embedded and movable inside the outer composite membrane column (1). A sedimentation tank (3) for treating and precipitating sewage is arranged near the outer composite membrane column (1). The outer composite membrane column (1) and the inner composite membrane column (2) are arranged inside the sedimentation tank (3). A filtration tank (6) for pre-filtering wastewater is arranged at the top of the sedimentation tank (3). A diversion assembly for diverting the wastewater to the inside of the outer composite membrane column (1) and the inner composite membrane column (2) is arranged at the bottom of the filtration tank (6).

2. The composite membrane column for wastewater treatment according to claim 1, wherein The inner composite membrane column (2) includes a central membrane column (21) for diverting wastewater and a two-way osmosis block (22). The two-way osmosis block (22) is arranged on both sides of the central membrane column (21) and is integrally connected to the central membrane column (21). A number of osmosis holes for filtering and osmosis of the wastewater diverted by the inner composite membrane column (2) are arranged on both sides of the two-way osmosis block (22). A notch adapted to the sizes of the central membrane column (21) and the two-way osmosis block (22) is arranged inside the outer composite membrane column (1). The inner composite membrane column (2) is movably connected inside the notch. A number of osmosis holes for repeatedly filtering and osmosis of wastewater are arranged inside the outer composite membrane column (1).

3. The composite membrane column for wastewater treatment according to claim 1, characterized in that The diversion assembly includes a diversion pipe (9) for diverting the wastewater inside the filtration tank (6) to the inside of the inner composite membrane column (2). The diversion pipe (9) is in the shape of a frustum of a cone. The two ends of the diversion pipe (9) are respectively embedded inside the filtration tank (6) and the inner composite membrane column (2). A telescopic lifting column (10) for driving the inner composite membrane column (2) to lift is arranged at the position of the filtration tank (6) close to the inner composite membrane column (2). Pulling blocks for lifting and pulling the inner composite membrane column (2) are arranged on both sides of the inner composite membrane column (2). The pulling blocks are perpendicularly connected to the telescopic lifting column (10), and a telescopic cylinder is arranged inside the telescopic lifting column (10).

4. A composite membrane column for wastewater treatment according to claim 1, wherein The filtration tank (6) is in the shape of a frustum of a cone. A middle pre-filtering plate (12) is arranged inside the filtration tank (6). A diversion pipe (7) for diverting wastewater is arranged at the top of the filtration tank (6). Support frames (8) for supporting and fixing the filtration tank (6) are arranged on both sides of the filtration tank (6).

5. A composite membrane column for wastewater treatment according to claim 1, characterized in that A sedimentation tank (11) for sedimentation after filtering and osmosis treatment of wastewater is arranged at the bottom of the sedimentation tank (3). A filtering plate for secondary filtration of wastewater is arranged inside the sedimentation tank (11). A liquid level sensor for sensing the liquid level of wastewater is arranged inside the sedimentation tank (11).

6. The composite membrane column for wastewater treatment according to claim 1, wherein A fixing block (4) for fixing the outer composite membrane column (1) is arranged at the position of the sedimentation tank (3) close to the outer composite membrane column (1). The fixing block (4) is detachably connected to the sedimentation tank (3). A number of clamps (5) for clamping the outer composite membrane column (1) are arranged on the fixing block (4).

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