WO2018082172A1

WO2018082172A1 - Membrane assembly for water treatment

Info

Publication number: WO2018082172A1
Application number: PCT/CN2016/112580
Authority: WO
Inventors: 宋岱峰; 韩亮; 邱迪
Original assignee: 成都美富特膜科技有限公司
Priority date: 2016-11-03
Filing date: 2016-12-28
Publication date: 2018-05-11
Also published as: CN106365306A

Abstract

A membrane assembly for water treatment, comprising a first supporting rod (100), a first end member (200), a second end member (300), and a membrane core (400). The membrane core (400) is installed on the supporting rod (100) and is axially positioned between the first end member (200) and the second end member (300); the membrane core (400) comprises multiple membrane elements (410) successively sleeved on the supporting rod (100) and arranged along the axial direction of the supporting rod (100), and a sealing means (420) separately matching the membrane elements (410); the membrane element (410) comprises a membrane piece (411); the membrane piece (411) comprises a first filtration membrane (411a), a second filtration membrane (411b) provided opposite to the first filtration membrane (411a), and a cavity (411c) formed between the first filtration membrane (411a) and the second filtration membrane (411b) by stacking the first filtration membrane (411a) and the second filtration membrane (411b); the cavity (411c) is in communication with a flow guide gap (430) formed between the supporting rod (100) and a through hole (411d) by means of the through hole (411d) running between the first filtration membrane (411a) and the second filtration membrane (411b) and used for matching the supporting rod (100); the flow guide gap (430) is in communication with an output port (500) of the membrane assembly by means of a flow guide channel provided in the supporting rod (100) and/or provided on the surface of the supporting rod (100); the first end member (200) and/or the second end member (300) comprises a flow guide matching structure (700); the flow guide matching structure (700) is used for matching and connecting an adjacent membrane assembly, so that the output port (500) between adjacent membrane assemblies is turned on.

Description

Membrane assembly for water treatment

Technical field

The present invention relates to a membrane module for water treatment, and more particularly to an MBR membrane module. "MBR" is Membrane Bio-Reactor, meaning a membrane bioreactor.

Background technique

Chinese Patent Application Publication No. CN105617865A (hereinafter referred to as reference) discloses a novel water treatment membrane stack for efficient filtration, belonging to a submerged MBR membrane module. In general, such a membrane module includes a support rod, a first end member, a second end member, and a membrane core, wherein the support rod is a hollow structure or a solid structure, and the first end member is mounted on the support rod At one end, a second end member is mounted to the other end of the support rod, the membrane core being mounted on the support rod and axially positioned between the first end member and the second end member. In a typical water treatment site, the above plurality of membrane modules are arranged and placed in a membrane bioreactor containing the sewage to be treated, immersed under the liquid level of the sewage to be treated, and the membrane modules arranged in these There is an aeration device below it. During operation, the aerated sewage is filtered through the membrane core under pressure and then the filtered water is output from the outlet of the membrane module.

The film core specifically includes a plurality of film elements which are sequentially sleeved on the support rods and arranged along the axial direction of the support rods, and sealing means respectively adapted to the respective film elements. Among them, the membrane element is specifically a membrane. The specific structure of the diaphragm is that the diaphragm comprises a first filter film, a second filter film disposed opposite to the first filter film, and a first filter film and a second filter film are stacked on the first filter film and a cavity between the filter membranes, the cavity is formed by a through hole formed between the first filter film and the second filter film and used for cooperating with the support rod and the guide bar and the through hole The gap is turned on. The flow guiding gap is electrically connected to the output port of the membrane module through a flow guiding channel disposed inside the support rod and/or the surface of the support rod. A specific structure of a sealing device includes: a sealing ring respectively disposed on each side of each membrane element, the sealing ring comprising a sealing ring body sleeved on the support rod and being pressed and disposed on the sealing ring body and the adjacent diaphragm The seal between the. The seal rings are sequentially arranged on the support rod and axially compressed between the first end member and the second end member.

The above support rods generally adopt a hollow structure and a plurality of flow guiding holes are arranged on the surface of the support rod. Thus, during the operation of the membrane module, the filtered water entering the membrane cavity through the filtration of the first filter membrane and the second filter membrane will flow out of the through hole of the membrane and enter the flow guiding gap, and then Then, the guide hole from the surface of the support rod enters the inner cavity of the support rod from the guide gap, and finally flows out from the output port of the membrane module. The output of the membrane module may be directly the open end of the support rod, or it may be located on the first end member or the second end member. Obviously, when the output port of the membrane module is located on the first end member or the second end member, the first end member or the second end member is correspondingly disposed with the support rod The open end is connected to the flow guiding structure.

At present, the output ports of the above membrane modules are always independently receiving the water pipes, that is, when the membrane modules are combined at the water treatment site, the outlets of each membrane module need to be separately connected to the water collecting pipes, and then these water receiving pipes are taken. The pipes are then separately connected to the external water collecting device of the membrane module. This not only makes the installation and debugging of the water treatment facility more troublesome, but also leads to a large number of pipes, and may also reduce the effective filtration area of the membrane module in a unit area.

Summary of the invention

The technical problem to be solved by the present invention is to provide a membrane module for water treatment, which can effectively solve the adverse effects caused by the outlet of the membrane module always receiving the water pipe independently. Furthermore, the present invention also provides an MBR membrane module and an MBR membrane element having a larger filtration area per unit area; an MBR membrane element having improved structure and an MBR membrane module having the MBR membrane element; And providing an MBR membrane module that can prevent the diaphragm position from swinging to some extent.

The membrane assembly for water treatment provided by the present invention comprises: a support rod, the support rod is a hollow structure or a solid structure; a first end member, the first end member is mounted at one end of the support rod; An end member, the second end member being mounted at the other end of the support rod; and a membrane core mounted on the support rod and axially positioned between the first end member and the second end member The membrane core includes a plurality of membrane elements sequentially sleeved on the support rods and arranged along the axial direction of the support rods, and sealing means respectively adapted to the respective membrane elements; the membrane elements comprising membranes, the membranes The first filter film, the second filter film disposed opposite to the first filter film, and the cavity formed by the first filter film and the second filter film formed between the first filter film and the second filter film, The cavity is conducted through a through-hole formed between the first filter film and the second filter film and configured to cooperate with the support rod, and a flow guiding gap formed between the support rod and the through hole, the flow guiding gap is passed Set inside the support bar and / or a flow guiding channel of the surface of the support rod is electrically connected to an output port of the membrane module; the first end member and/or the second end member comprises a flow guiding adaptation structure for adapting the connection phase The adjacent membrane modules thereby conduct the output ports between the adjacent membrane modules. After the above-mentioned flow guiding adaptation structure is disposed, the adjacent membrane modules can be connected by the flow guiding fitting structure, and the output ports between the adjacent membrane modules are connected after the connection, so that one of the membranes from the adjacent membrane modules is connected. The filtered water produced by the output of the module will pass through the flow guiding adapter structure into the other membrane module and out through the outlet of the other membrane module, thereby reducing the number of external receiving water pipes corresponding to each membrane module, not only It makes the combination of membrane modules more convenient, and also helps to increase the effective filtration area of the membrane system per unit area. The above membrane modules for water treatment are generally widely used as MBR membrane modules.

As a specific implementation of the flow guiding adaptation structure, the flow guiding adapter structure includes a flow guiding adapter having a first interface for connecting with a flow guiding channel in the membrane module in which it is located, as Loss of the membrane module a second interface of the outlet and a third interface for connecting to an output port of the adjacent membrane module, the filtered water collected from the first interface and the third interface is collected in the cavity of the flow guiding adapter and from the second interface Flow out. The first interface function is to collect the filtered water body obtained by filtering the membrane core, the second interface is for producing the filtered water body, and the third interface is for connecting the output port of the adjacent membrane module and collecting the adjacent membrane from the adjacent membrane. The filtered water produced by the output of the component. It should be mentioned that when a membrane module does not need to be connected to the outlet of an adjacent membrane module (for example, the membrane module itself is a membrane module at the edge of the membrane system and does not obtain the filtered water produced by other membrane modules), The third interface is closed. As a preferred structure of the above-mentioned flow guiding adapter, the flow guiding adapter includes a draft tube disposed perpendicularly to the support rod, and the second interface and the third interface are respectively disposed at two ends of the draft tube, the first interface It is placed on the side wall of the draft tube. In addition, a fourth interface connectable to the external water collecting device of the membrane module may be disposed on the sidewall of the draft tube, and the sealing cover may be detachably connected to the fourth interface. The fourth interface can serve as a conduit for producing filtered water in exceptional circumstances.

As a further improvement to the above-described membrane module for water treatment, an anti-offset support structure is provided in the cavity of the membrane. In the improved membrane module, each membrane element can be spaced from adjacent membrane elements under the support of an anti-offset support structure in its membrane, reducing or even avoiding the risk of bonding between the membranes. Improve the efficiency of the membrane module and the life of the diaphragm. The anti-offset support structure is built in the cavity of the diaphragm, so that there is no need to provide a spacer net identical or similar to the reference document between the diaphragms, thereby effectively reducing the water flow obstruction on the filter side; and the spacing between the diaphragms is also suitable Decreasing is beneficial to increase the filtration area. A preferred anti-offset support structure includes a support plate stacked between the first filter film and the second filter film and an assembly hole disposed on the support plate and mated with the support bar. The anti-offset support structure is easy to manufacture and install, and the thinner thickness can ensure the number of diaphragms mounted on the support rod, and after the support plate is set, the cavity of the diaphragm can be divided into two parallel cavities, starting from To the diversion and diversion, it is beneficial to improve the working efficiency of the membrane module.

As a further improvement of the above-described membrane module for water treatment, the membrane element adopts a rectangular diaphragm having a uniform shape and size so that the outer shape of the membrane core becomes a rectangular body. The membrane element is further preferably a square membrane; more preferably a square membrane having a length or width of 200 to 1000 mm. In the improved membrane module, the membrane element adopts a rectangular diaphragm having a uniform shape and size so that the outer shape of the membrane core becomes a rectangular body. The membrane module in the reference uses a circular diaphragm, so that the shape of the membrane core corresponds to a cylinder. When the membrane module is placed in a lying state, it is assumed that the rectangular body membrane core of the membrane module of the present invention has the same projected area on the horizontal plane as the cylindrical membrane core of the membrane module in the reference and the membrane module is placed horizontally. Also the same height, the filtration area of the membrane module of the present invention is clearly greater than the filtration area of the membrane module in the reference. Therefore, the membrane module of the present invention can have a larger filtration area per unit area than the membrane module in the reference, and thus work more efficiently.

As a further improvement to the above-described membrane module for water treatment, at least one membrane edge positioning device is disposed outside the side of the membrane core; the membrane edge positioning device includes a parallel arrangement with the support rod and First end member and/or a positioning rod corresponding to the second end member and a positioning tooth disposed on the positioning rod and arranged along the length of the positioning rod, and a positioning slot corresponding to the diaphragm is formed between the adjacent positioning teeth, and each of the diaphragms The edges are respectively engaged in the corresponding positioning card slots. Wherein, both ends of the positioning rod are preferably mounted on the first end member and the second end member, respectively. Additionally, the locating rod can also serve as a tie rod connecting the first end member and the second end member such that the first end member second end member axially compresses the membrane core. The above-mentioned diaphragm edge positioning device can respectively engage the edges of the respective diaphragms in the corresponding positioning card slots in the device, thereby effectively positioning the edge portions of the diaphragm.

The invention provides an MBR membrane module, comprising: a support rod, the support rod is a hollow structure or a solid structure; a first end member, the first end member is mounted on one end of the support rod; the second end portion a member, the second end member being mounted at the other end of the support rod; and a membrane core mounted on the support rod and axially positioned between the first end member and the second end member, the member The membrane core includes a plurality of membrane elements sequentially sleeved on the support rods and spaced apart along the axial direction of the support rods, and sealing means respectively adapted to the respective membrane elements; wherein the membrane elements comprise membranes, the membranes The sheet includes a first filter film, a second filter film disposed opposite the first filter film, and a cavity formed by the first filter film and the second filter film being formed between the first filter film and the second filter film. The cavity is electrically connected to a conduction gap formed between the support rod and the through hole through a through hole penetrating between the first filter film and the second filter film and configured to cooperate with the support rod, the flow guiding gap By being placed inside the support rod / Or the surface of the support bar guide channel output port conducting membrane; the membrane element rectangular diaphragm shape, the same size, so that the outer shape of a rectangular membrane cartridge body. Since the membrane element in the MBR membrane module adopts a rectangular diaphragm having a uniform shape and size, the outer shape of the membrane core becomes a rectangular body. The MBR membrane module in the reference uses a circular diaphragm, so that the shape of the membrane core corresponds to a cylinder. When the MBR membrane module is placed in a lying state, it is assumed that the rectangular body membrane core of the MBR membrane module of the present invention has the same projected area on the horizontal plane as the cylindrical membrane core of the MBR membrane module in the reference and the MBR membrane module The height of the MBR membrane module of the present invention is also significantly greater than the filtration area of the MBR membrane module in the reference. Therefore, the MBR membrane module of the present invention can have a larger filtration area per unit area than the membrane module in the reference, and thus work more efficiently.

The invention provides an MBR membrane element, comprising a membrane, the membrane comprising a first filtration membrane, a second filtration membrane disposed opposite the first filtration membrane, and a first filtration membrane and a second filtration membrane a cavity formed between the first filter film and the second filter film, the cavity communicating with the outside of the diaphragm through a through hole penetrating between the first filter film and the second filter film, the film being rectangular. The membrane of the MBR membrane element has a rectangular shape, and a plurality of rectangular membranes having the same shape and size are combined, and the outer shape of the membrane core is a rectangular body. The MBR membrane module in the reference uses a circular diaphragm, so that the shape of the membrane core corresponds to a cylinder. When the MBR membrane module is placed in a lying state, it is assumed that the rectangular body core of the MBR membrane module of the present invention is in a horizontal plane with the cylindrical membrane core of the MBR membrane module in the reference. The projection area of the MBR membrane module using the MBR membrane element of the present invention is obviously larger than the filtration area of the MBR membrane module in the reference, since the projected areas are the same and the height of the MBR membrane module is also the same.

In the above MBR membrane module and MBR membrane element, a square diaphragm is preferably used; more preferably, a square diaphragm having a length or a width of 200 to 1000 mm is used. In the MBR membrane module and the MBR membrane element described above, an anti-offset support structure may also be disposed in the cavity of the membrane. In this way, each membrane element of the MBR membrane module can be spaced from adjacent membrane elements under the support of the anti-offset support structure in its membrane, reducing or even avoiding the risk of bonding between the membranes, and improving the MBR membrane. The efficiency of the components and the life of the diaphragm. The anti-offset support structure is built in the cavity of the diaphragm, so that there is no need to provide a spacer net identical or similar to the reference document between the diaphragms, thereby effectively reducing the water flow obstruction on the filter side; and the spacing between the diaphragms is also suitable The reduction is advantageous for further increasing the filtration area of the membrane module.

Another MBR membrane assembly provided by the present invention comprises: a support rod, the support rod is a hollow structure or a solid structure; a first end member, the first end member is mounted at one end of the support rod; the second end a second end member mounted on the other end of the support rod; and a membrane core mounted on the support rod and axially positioned between the first end member and the second end member, The membrane core includes a plurality of membrane elements sequentially sleeved on the support rods and spaced apart along the axial direction of the support rods, and sealing means respectively adapted to the respective membrane elements; wherein the membrane elements comprise membranes, The diaphragm includes a first filter film, a second filter film disposed opposite the first filter film, and a cavity formed by the first filter film and the second filter film being formed between the first filter film and the second filter film The cavity is conducted by a through-hole formed between the first filter film and the second filter film and configured to cooperate with the support rod and the flow guiding gap formed between the support rod and the through hole, the diversion The gap is set in the support rod And a flow channel / or pole surface of the conductive membrane module outlet; said diaphragm cavity is provided with an anti-offset support structure. In the MBR membrane module, each membrane element can maintain a space between adjacent membrane elements under the support of the anti-offset support structure in the diaphragm, thereby reducing or even avoiding the risk of bonding between the membranes, and improving the MBR. Membrane assembly efficiency and diaphragm life. The anti-offset support structure is built in the cavity of the diaphragm, so that there is no need to provide a spacer net identical or similar to the reference document between the diaphragms, thereby effectively reducing the water flow obstruction on the filter side; and the spacing between the diaphragms is also suitable Decreasing is beneficial to increase the filtration area.

Another MBR membrane element provided by the present invention comprises a membrane comprising a first filtration membrane, a second filtration membrane disposed opposite the first filtration membrane, and a first filtration membrane and a second filtration membrane a cavity formed between the first filter film and the second filter film, the cavity communicating with the outside of the diaphragm through a through hole penetrating between the first filter film and the second filter film, the cavity of the diaphragm An anti-offset support structure is provided in the middle. Since the cavity of the diaphragm is provided with an anti-offset support structure, a plurality of MBR membrane elements are combined to form an MBR membrane module, and each membrane element is supported by the anti-offset support structure in the diaphragm. The spacing between the adjacent membrane elements reduces or even avoids the risk of bonding between the membranes, improving the working efficiency of the MBR membrane module and the service life of the membrane. Anti-offset support structure built into the membrane In the cavity of the sheet, there is no need to provide a spacer net which is the same or similar to the reference document, which effectively reduces the water flow obstruction on the filter side; and the spacing between the diaphragms can be appropriately reduced, which is advantageous for increasing the filtration. area.

A preferred anti-offset support structure includes a support plate stacked between the first filter film and the second filter film and an assembly hole disposed on the support plate and mated with the support bar. Correspondingly, in the MBR membrane element provided to solve the above second technical problem, the preferred anti-offset support structure comprises a support plate stacked between the first filter film and the second filter film, and the support plate is provided with A mounting hole coaxial with the through hole. The anti-offset support structure is easy to manufacture and install, and the thinner thickness can ensure the number of diaphragms mounted on the support rod, and after the support plate is set, the cavity of the diaphragm can be divided into two parallel cavities, starting from To the diversion and diversion, it is beneficial to improve the working efficiency of the MBR membrane module. As a preferred arrangement of the sealing device, a sealing ring is respectively arranged on both sides of each membrane element; the sealing ring comprises a sealing ring body sleeved on the support rod and is arranged between the sealing ring body and the adjacent diaphragm The sealing ring is located in the diaphragm of each membrane element and is disposed perpendicular to the support rod under the clamping force of the sealing ring on both sides of the membrane element. Since the sealing rings are respectively disposed on both sides of each membrane element, the support plates located in the membranes of the membrane elements are vertically disposed with the support rod under the clamping force of the sealing rings on both sides of the membrane element, thereby ensuring the support plate and the support. The stability of the positioning between the rods ensures the anti-offset support of the support plate to the diaphragm.

Another MBR membrane module provided by the present invention comprises: a support rod, the support rod is a hollow structure or a solid structure; a first end member, the first end member is mounted at one end of the support rod; the second end a second end member mounted on the other end of the support rod; and a membrane core mounted on the support rod and axially positioned between the first end member and the second end member, The membrane core includes a plurality of membrane elements sequentially sleeved on the support rods and spaced apart along the axial direction of the support rods, and sealing means respectively adapted to the respective membrane elements; wherein the membrane elements comprise membranes, The diaphragm includes a first filter film, a second filter film disposed opposite the first filter film, and a cavity formed by the first filter film and the second filter film being formed between the first filter film and the second filter film The cavity is conducted by a through-hole formed between the first filter film and the second filter film and configured to cooperate with the support rod and the flow guiding gap formed between the support rod and the through hole, the diversion The gap is set in the support rod And/or a flow guiding channel of the surface of the support rod is electrically connected to the output port of the membrane module; at least one diaphragm edge positioning device is disposed outside the side of the membrane core; the diaphragm edge positioning device comprises a support rod a positioning rod disposed in parallel with the first end member and/or the second end member and a positioning tooth disposed on the positioning rod and arranged along the length of the positioning rod, forming a diaphragm between the adjacent positioning teeth One-to-one corresponding positioning card slots, the edges of each diaphragm are respectively engaged in corresponding positioning card slots. The above-mentioned diaphragm edge positioning device can respectively engage the edges of the respective diaphragms in the corresponding positioning card slots in the device, thereby effectively positioning the edge portions of the diaphragm. The MBR membrane assembly can use the diaphragm edge positioning device in combination with the spacer web disclosed in the reference or the above-mentioned anti-offset support structure mentioned in the present invention, thereby more effectively preventing the diaphragm from moving between the diaphragms. Bonding.

The invention will be further described with reference to the drawings and specific embodiments. The additional aspects and advantages of the invention will be set forth in part in the description which follows.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view showing the structure of a membrane module for water treatment of the present invention.

Figure 2 is a left side view of Figure 1.

Figure 3 is a cross-sectional view taken along line A-A of Figure 1.

Figure 4 is a partial enlarged view of B in Figure 3.

Figure 5 is a schematic view of two adjacent membrane modules shown in Figure 1 after being fitted.

Figure 6 is a schematic view showing the structure of a membrane element in the membrane module of the present invention.

Figure 7 is a cross-sectional view taken along line B-B of Figure 6.

Figure 8 is a schematic view showing the structure of the support plate of Figure 6.

Figure 9 is a partial enlarged view of a portion C in Figure 7.

Figure 10 is a schematic exploded view of the membrane element of the membrane module of the present invention.

Figure 11 is a schematic view showing the structure of a film edge positioning device in the film assembly of the present invention.

Figure 12 is a perspective view of the diaphragm edge positioning device.

The figure is labeled as: support rod 100, guide hole 110, first end member 200, first support plate 210, plug 220, second end member 300, second support plate 310, lock nut 320, Water joint 330, film core 400, membrane element 410, membrane 411, first filter membrane 411a, second filter membrane 411b, cavity 411c, through hole 411d, anti-offset support structure 411e, support plate 411f, assembly hole 411g Supporting net 411h, welding boring 411i, sealing device 420, sealing ring 421, sealing ring body 421a, sealing ring 421b, flow guiding gap 430, output port 500, diaphragm edge positioning device 600, positioning rod 610, core rod 611 a tube 612, a positioning tooth 620, a chamfer 621, a positioning card slot 630, a flow guiding adapter structure 700, a flow guiding adapter 710, a first interface 711, a second interface 712, a third interface 713, a draft tube 714, Four interfaces 715, sealing cover 716, sealing ring 717, membrane assembly end housing 720, panel 730, and fitting structure 800.

detailed description

A membrane assembly for water treatment as shown in FIGS. 1 to 4, comprising a support rod 100, a first end member 200, a second end member 300, a membrane core 400, and an outlet port 500, wherein the first end member 200 is mounted at one end of the support rod 100, and the second end member 300 is mounted at the other end of the support rod 100. The membrane core 400 is mounted on the support rod 100 and axially positioned at the first end member 200 and the second end. Between the members 300; the outlet 500 is disposed at the first end In addition, a guide channel is further disposed inside the support rod 100 and/or the surface of the support rod 100, and the flow guiding channel is both electrically connected to the water outlet of the membrane core 400 and is electrically connected to the output port 500 of the membrane module, so that The filtered water body produced by the membrane core 400 is led out of the membrane module from the outlet 500. The above membrane module is used as a submerged MBR membrane module, which is generally installed in a membrane bioreactor by a stent and placed above the aeration device. During use, the MBR membrane module is immersed in the sewage for aeration treatment. Filtered by the membrane core 400 under filtration pressure, and finally the filtered water body is output from the output port 500 of the MBR membrane module.

As shown in FIGS. 1 to 4, the film core 400 includes a plurality of film elements 410 which are sequentially sleeved on the support rod 100 and arranged along the axial direction of the support rod 100, and sealing means 420 respectively adapted to the respective film elements 410. . Specifically, as shown in FIGS. 1 to 4 and FIGS. 6 to 9, the film member 410 includes a diaphragm 411 including a first filter film 411a and a second opposite to the first filter film 411a. a filter film 411b and a cavity 411c formed by the first filter film 411a and the second filter film 411b formed between the first filter film 411a and the second filter film 411b, the cavity 411c passing through the first filter film A through hole 411d between the 411a and the second filter film 411b for engaging with the support rod 100 is electrically connected to the flow guiding gap 430 formed between the support rod 100 and the through hole 411d, and the flow guiding gap 430 passes through A flow guiding passage disposed inside the support rod 100 and/or on the surface of the support rod 100 is electrically connected to the output port 500 of the MBR membrane module.

The working principle of the film core 400 is that the sewage to be filtered penetrates from the first filter film 411a and the second filter film 411b into the cavity 411c between the first filter film 411a and the second filter film 411b under the filtering pressure. Since the cavity 411c is electrically connected to the through hole 411d penetrating between the first filter film 411a and the second filter film 411b and for supporting the support rod 100, the through hole 411d is further present between the support rod 100 and the support rod 100. The flow guiding gap 430, therefore, the filtered water body that has penetrated into the cavity 411c will flow into the flow guiding gap 430, and then flow to the output port of the MBR membrane assembly through the flow guiding passage provided inside the support rod 100 and/or the surface of the support rod 100. 500. Since the sealing device 420 is provided in the film core 400, mutual penetration between the filtered water body and the sewage to be filtered can be avoided.

Conventionally, since the bonding between the diaphragms 411 is likely to occur, the filtration efficiency is lowered and the life of the diaphragm is lowered, and a spacer web is provided between the adjacent diaphragms 411. As shown in FIGS. 1 to 9, in the present embodiment, a spacer net is not provided, and instead, an anti-offset support structure 411e is added to the cavity 411c of each diaphragm 411. The anti-offset support structure 411e specifically employed in the present embodiment includes a support plate 411f stacked between the first filter film 411a and the second filter film 411b, and an assembly disposed on the support plate 411f and mated with the support rod 100. Hole 411g. Among them, the shape and size of the support plate 411f are preferably matched with the cavity 411c, so that the support effect on the diaphragm is better. The support plate 411f is preferably a flat plate having a thickness of 0.3 to 2 mm, so that the strength of the support plate 411f can be ensured, and the overall thickness of the diaphragm 411 can be ensured to be thin, thereby ensuring the number of the diaphragms 411 on the support bar 100. Support plate Some hollow holes can be opened on the 411f, or a solid plate can be used as the support plate 411f. When a solid-structured flat plate is used as the support plate 411f, the support plate 411f can actually divide the cavity 411c into two substantially spaced and parallel cavities for better shunting and diversion. The support plate can generally be made of a rigid material such as hard plastic.

As shown in FIG. 4 , in the specific embodiment, the sealing device 420 is configured to have a sealing ring 421 on each side of each membrane element 410 . The sealing ring 421 includes a sealing sleeve that is sleeved on the support rod 100 . a ring body 421a and a sealing ring 421b squeezing between the sealing ring body 421a and the adjacent diaphragm 411; a supporting plate 411f located in the diaphragm 411 of each membrane element 410 on the sealing ring 421 on both sides of the membrane element 410 It is disposed perpendicular to the support rod 100 under the clamping force. For the sealing device 420 described above, since the seal ring 420 is provided on each side of each of the membrane elements 410, the clamping force of the seal ring 420 of the support plate 411f located in the diaphragm 411 of each membrane element 410 on both sides of the membrane element 410 The vertical arrangement with the support rod 100 ensures the stability of the positioning between the support plate 411f and the support rod 100, thereby ensuring the anti-offset support effect of the support plate 411f on the diaphragm 411.

As shown in FIGS. 1 to 9, in the present embodiment, the membrane elements 410 in the MBR membrane module are all rectangular diaphragms 411 having the same shape and size so that the outer shape of the membrane core 400 becomes a rectangular body. Conventional MBR membrane modules use a circular diaphragm, so that the shape of the membrane core corresponds to a cylinder. When the MBR membrane module is placed in a lying state, it is assumed that the rectangular body core of the MBR membrane module of the present embodiment has the same projected area on the horizontal plane as the cylindrical core of the conventional MBR membrane module and the MBR. When the height of the membrane module is also the same, the filtration area of the MBR membrane module of the present embodiment is obviously larger than that of the conventional MBR membrane module. Therefore, the MBR membrane module of the present embodiment can have a larger filtration area per unit area and a higher working efficiency. In a typical water treatment site, the above plurality of MBR membrane modules are arranged to form an MBR membrane system and placed in a membrane bioreactor containing sewage to be treated, immersed under the liquid surface of the sewage to be treated, An aeration device is disposed below the aligned membrane modules. In general, the MBR membrane system package further includes a membrane assembly lying-up bracket, and the membrane assembly is arranged on the horizontal support bracket with a plurality of MBR membrane modules arranged in a horizontally arranged state. on.

In the embodiment, the membrane element 410 is preferably a square diaphragm 411 of uniform size, which facilitates the manufacture of the diaphragm 411. In general, the membrane element 410 may employ a square diaphragm 411 having a length or width of 200 to 1000 mm, with a square diaphragm 411 having a length or width of 300 to 500 mm being preferred. From the viewpoint of manufacturing the diaphragm 411, it is preferable to set the four corners of the diaphragm 411 to be rounded; when the diaphragm 411 is the square diaphragm 411, the ratio of the radius of the rounded corner to the length or width of the square diaphragm 411 0.02 to 0.08 is preferred. This is because, in order to constitute the diaphragm 411, the edge of the first filter film 411a and the edge of the second filter film 411b must be integrated with each other, so that the sealing can be achieved. In general, the edge of the first filter film 411a and the edge of the second filter film 411b are The portion of the first filter film 411a that is fused with the edge of the second filter film 411b is fused by a thermal processing technique to form a pad 411i. The four corners of the diaphragm 411 are set to be rounded, and the weld 411i of these rounded portions smoothly transitions with the rounded corners, thereby ensuring the sealing effect of the four corners of the diaphragm 411. The ratio of the radius of the rounded corners to the length or width of the square diaphragm 411 is set to 0.02 to 0.08, which ensures the sealing of the four corners of the diaphragm 411, and also avoids the excessive radius of the rounded corners and reduces the filtering area of the diaphragm 411. .

As shown in Figures 1 to 5, the key point of the MBR membrane assembly of the present embodiment is that the first end member 200 described above includes a flow guiding adapter structure 700 for adapting the connection. Adjacent membrane modules thereby conduct the output port 500 between the adjacent membrane modules. Specifically, as shown in FIG. 3, in the specific embodiment, the flow guiding adapter structure 700 includes a flow guiding adapter 710, which has a function for connecting with a flow guiding channel in a membrane module in which it is located. a first interface 711, a second interface 712 as an output port 500 of the membrane module in which it is located, and a third interface 713 for connecting to the output port 500 of the adjacent membrane module, from the first interface 711 and the third interface 713 The collected filtered water collects in the cavity of the flow guiding adapter 710 and flows out of the second interface 712. The first interface 711 functions to collect the filtered water body filtered by the membrane core 400, the second interface 712 functions to produce the filtered water body, and the third interface 713 functions to connect the output port 500 of the adjacent membrane module and collect Filtered water produced from the output port 500 of the adjacent membrane module. When the adjacent membrane modules are adapted for connection by the flow guiding adapter structure 700, the second interface 712 of one of the membrane modules is adapted to the third interface 713 of the other membrane module, such that from the adjacent membrane modules The filtered water produced by the output port 500 of one of the membrane modules will pass through the flow guiding adapter structure 700 into another membrane module and out through the outlet port 500 of the other membrane module, thereby reducing external reception corresponding to each membrane module. The number of water pipes not only makes the combination of membrane modules more convenient, but also helps to increase the effective filtration area of the membrane system per unit area.

As shown in FIG. 3, as a preferred structure of the flow guiding adapter 710, the flow guiding adapter 710 includes a draft tube 714 disposed perpendicular to the support rod 100, and the second interface 711 and the third interface 713. They are respectively disposed at two ends of the draft tube 714, and the first interface 711 is disposed on the sidewall of the draft tube 714. The draft tube 714 can be designed as a flat tube such that the length of the cross section of the flat tube is greater than the width, and the width is parallel to the axial direction of the support rod 100, so that the flow guiding adapter 710 can be shortened in the axial direction of the support rod 100. The thickness, in turn, reduces the thickness of the first end member 200 in the axial direction of the support bar 100, ultimately shortening the length of the entire film assembly. In addition, the sidewall of the draft tube 714 is further provided with a fourth interface 715 connectable to the external water collecting device of the membrane assembly, and the fourth interface 715 is detachably connected to the sealing cover 716. Preferably, the first interface 711 and the fourth interface 715 are coaxial with the support bar 100. The fourth interface 715 can serve as a passage for producing filtered water in special cases. As shown in FIG. 3, in order to better fit the structure of the above-described flow guiding adapter 710, the flow guiding passage of the membrane module passes through the opening of the support rod 100 of the hollow structure of the surface distribution guiding hole 110. The first outlet 711 is connected to the open end of the support rod 100 and axially compresses the membrane core 400. A sealing member is disposed between the first interface 711 and the support rod 100 (preventing the filtered water body from the first The joint between the interface 711 and the support rod 100 leaks, so that the conduction between the membrane core 400 and the flow guiding adapter 710 is achieved in a simple manner.

Example 1

As shown in FIGS. 1 to 4, the MBR membrane module has a membrane element 410 of a square diaphragm 411 having a uniform shape and size. The diaphragm 411 has a length or width of 320 mm. The four corners of the diaphragm 411 are each set to have a radius of 15 mm. A through hole 411d is provided in the center of the diaphragm 411. A cavity 411c of the diaphragm 411 is provided with a support plate 411f having a thickness of 1.2 mm. The support plate 411f is a square solid plate, and the four corners of the support plate 411f are respectively chamfered. The center of the support plate 411f is provided with a fitting hole 411g, and the fitting hole 411g is coaxially disposed with the through hole 411d. The length or width of the square support plate 411f is 20 mm smaller than the length or width of the square diaphragm 411 to leave the position of the pad 411i. The diaphragm 411 is formed by sequentially laminating the support plate 411f and the second filter film 411b on the first filter film 411a, and then thermally welding the edge of the first filter film 411a with the edge of the second filter film 411b. The method of thermally processing the edge of the first filter film 411a and the edge of the second filter film 411b is conventional, and therefore will not be described again.

In the MBR membrane module of the first embodiment, the support rod 100 is a hollow tubular body, and a plurality of flow guiding holes 110 are spaced apart from each other along the axial direction of the support rod 100. The seal ring body 421a of each seal ring 421 is in clearance engagement with the support rod 100, and at the same time, since the through hole 411d of each diaphragm 411 is electrically connected to the flow guiding gap 430 formed between the support rod 100 and the through hole 411d, then, The engagement gap between the flow guiding gap 430 and the sealing ring body 421a and the support rod 100 forms a conductive flow path (ie, a flow guiding channel disposed on the surface of the support rod 100) for guiding the filtered water body to the support rod. Each of the flow guiding holes 110 on the 100 then enters the tubular body of the support rod 100.

In the MBR membrane module of Embodiment 1, the first end member 200 includes a flow guiding adapter 710 and a membrane module end housing 720 disposed outside the flow guiding adapter 710; the second end member 300 includes a lock nut and is disposed at The membrane assembly end housing 720 outside the lock nut. In order to connect the support rod 100 with the first end member 200 and the second end member 300, a first column is provided on the column of the support rod 100 for connecting one end of the flow guiding adapter 710 to the first interface 711. The surface thread has a second cylindrical thread on the cylindrical surface of the support rod 100 for the end connected to the lock nut. The first end member 200 and the second end member 300 are connected to the support rod 100 in such a manner that the first interface 711 of the flow guiding adapter 710 is fitted on one end of the support rod 100 and screwed with the first cylindrical thread, and the lock nut is locked. The sleeve is threaded on the other end of the support rod 100 and is threadedly connected to the second cylinder. The first interface 711 of the flow guiding adapter 710 and the lock nut are the membrane core 400, and the sealing rings 421 in the membrane core 400 are axially pressed. Immediately between the first interface 711 of the flow guiding adapter 710 and the lock nut.

Further, a panel 730 may be mounted on the inner side of the membrane module end housing 720 of the first end member 200. Similarly, a panel 730 may be mounted on the inner side of the membrane module end housing 720 of the second end member 300. . The first interface 711 of the flow guiding adapter 710 can extend the panel 730 for a distance and then press the core 400. The locking nut can extend the core 400 by extending the panel 730 through a pressing sleeve. In this way, the overall shape of the membrane module can be made more beautiful.

The membrane module end housing 720 of the first end member 200 is provided with openings corresponding to the second interface 720, the third interface 730, and the fourth interface 715, respectively. In addition, the membrane assembly end housing 720 of the first end member 200 is further provided with an adapter connection structure 800 for correspondingly corresponding to the first end member 200 of the adjacent membrane module. The connection structure 800 is adapted for connection. The membrane module end housing 720 on the second end member 300 is also provided with an adapter connection structure 800 for correspondingly corresponding to the second end member 300 of the adjacent membrane module. The connection structure 800 is adapted for connection. The adapter structure 800 can take a variety of specific forms, such as snap-on structures, 榫卯 structures, and the like. As shown in FIG. 5, when the adjacent membrane modules are adapted and coupled by the flow guiding adapter structure 700 and the adapter connection structure 800, the second interface 712 of one of the membrane modules will be at the third interface 713 of the other membrane module. Adapted, the flow guiding adapter 710 between adjacent membrane modules is in communication.

Example 2

The support rod 100 of Embodiment 1 was replaced with a solid rod. Based on this, the structure of the first interface 711 of the flow guiding adapter 710 is adjusted accordingly, so that the flow path formed by the matching gap between the guiding gap 430 and the sealing ring body 421a and the support rod 100 is disposed on the support. The filtered water in the flow guiding channel on the surface of the rod 100 flows directly from the mating surface between the support rod 100 and the first interface 711 of the flow guiding adapter 710 into the flow guiding adapter 710. Specifically, a guiding hole that is electrically connected to the guiding tube 714 is disposed in a sidewall of the first interface 711 of the flow guiding adapter 710, and the guiding hole is electrically connected to the guiding channel disposed on the surface of the support rod 100.

Example 3

As shown in FIGS. 9 to 10, the diaphragm 411 of the first embodiment is modified, and specifically, a support net 411h is provided inside the first filter film 411a and inside the second filter film 411b, respectively. As shown in FIG. 10, after the modified diaphragm 411 is stacked on the first filter film 411a, the support mesh 411h, the support plate 411f, the support mesh 411h, and the second filter film 411b are sequentially disposed, and then the first filter film 411a is further disposed. The edge is thermally processed and fused with the edge of the second filter film 411b, and the support mesh 411h inside the first filter film 411a and the edge of the support mesh 411h inside the second filter film 411b are preferably joined together in the pad 411i. The support net 411h can further support the first filter film 411a and the second filter film 411b, and can better prevent the deformation of the diaphragm 411 when used together with the support plate 411f. In addition, the support net 411h plays a certain role of guiding, which helps To improve the filtering effect. The hole of the support net 411h in this embodiment The diameter is 30 to 40 mesh, which not only has a small resistance to fluid, but also has a remarkable effect of diversion.

Example 4

As shown in FIGS. 1 to 5 and FIGS. 11 to 12, on the basis of the first embodiment, two diaphragm edge positioning devices 600 are disposed outside the opposite sides of the film core 400, and are located outside the same side of the film core 400. The two diaphragm edge positioning devices 600 are symmetrically disposed on both sides of the central axis of the film core 400. The diaphragm edge positioning device 600 includes a positioning rod 610 disposed in parallel with the support rod 100 and disposed on the positioning rod 610. And positioning teeth 620 arranged along the length of the positioning rod 610, the two ends of the positioning rod 610 are respectively mounted on the first end member 200 and the second end member 300, and the film is formed between the adjacent positioning teeth 620. The strips 411 are correspondingly positioned with the positioning slots 630, and the edges of the diaphragms 411 are respectively engaged in the corresponding positioning slots 630. In this embodiment, the depth of the positioning card slot 630 is set to 20 mm, which can achieve a better diaphragm positioning effect. In addition, the top of each positioning tooth 620 is further provided with a chamfer 621 at the notch of the positioning card slot 630, so that the edge of the diaphragm 411 can be easily inserted into the positioning card slot 630 when the positioning slot 630 is engaged with the diaphragm 411. In this embodiment, the above-mentioned diaphragm edge positioning device 600 is added to the embodiment 1, and the diaphragm 411 can be further positioned to well control the swing at the edge of the diaphragm 411 during operation; the diaphragm The edge positioning device 600 can hold the diaphragm 411 firmly in cooperation with the support plate 411f in the diaphragm 411, and the diaphragm edge positioning device 600 has little resistance to water flow.

Example 5

On the basis of Embodiment 4, the manner in which the first end member 200 is coupled to the support rod 100 is improved. Specifically, as shown in FIG. 3, in the present embodiment, the open end of the support rod 100 is directly fitted into the first interface 711 of the flow guiding adapter 710 but is not screwed. In order to enable the first interface 711 of the flow guiding adapter 710 to press the core 400, the positioning rod 610 of the diaphragm edge positioning device 600 in this embodiment serves as a connection between the first end member 200 and the second end member. The tie rod of 300 causes the first end member 200 second end member 300 to axially compress the membrane core 400. Specifically, both ends of the positioning rod 610 of the diaphragm edge positioning device 600 are respectively connected to the membrane module end housing 720 of the first end member 200 and the membrane assembly end housing 720 of the second end member 300, The membrane assembly end housing 720 of the second end member 300 is locked to one end of the support rod 100 by a lock nut, and the membrane assembly end housing 720 of the first end member 200 is pressed under the tension of the positioning rod 610. The adapter 710 thus causes the first interface 711 of the flow guiding adapter 710 to compress the core 400. This approach not only simplifies the installation of the flow guiding adapter 710 and the support rod 100, but also avoids axial positioning (i.e., internal positioning) and passage of the membrane 411 by the first end member 200 and the second end member 300. The edge positioning device 600 causes an error in the axial positioning (ie, external positioning) of the diaphragm 411 to cause deformation of the diaphragm.

Example 6

The diaphragm edge positioning device 600 is modified on the basis of Embodiment 4. Improved diaphragm edge positioning The positioning tooth 620 of the 600 is made of a rubber material, and since the rubber surface is soft and has a large frictional resistance between the diaphragm 411 and the diaphragm 411, the diaphragm 411 is not damaged and can be better. The diaphragm 411 is restricted from moving. In addition, the diaphragm edge positioning device 600 positioning rod also adopts a socket structure including a core rod 611 and a tube 612 sleeved on the core rod 611, wherein the tube 612 is made of rubber and integrally formed with the positioning teeth 620. This ensures both the strength of the diaphragm edge positioning device 600 and the ease of manufacture of the positioning teeth 620.

Claims

Membrane modules for water treatment, including:

a support rod (100), the support rod (100) is a hollow structure or a solid structure;

a first end member (200), the first end member (200) being mounted at one end of the support rod (100);

a second end member (300), the second end member (300) being mounted at the other end of the support rod (100);

a membrane core (400) mounted on the support rod (100) and axially positioned between the first end member (200) and the second end member (300), the membrane core ( 400) comprising a plurality of membrane elements (410) sequentially sleeved on the support rod (100) and arranged along the axial direction of the support rod (100) and sealing means (420) respectively adapted to the respective membrane elements (410) ;

The membrane element (410) includes a membrane (411) including a first filtration membrane (411a), a second filtration membrane (411b) disposed opposite the first filtration membrane (411a), and a first filter film (411a) and a second filter film (411b) are stacked to form a cavity (411c) between the first filter film (411a) and the second filter film (411b), the cavity (411c) a through hole (411d) penetrating between the first filter film (411a) and the second filter film (411b) for mating with the support rod (100) and the support rod (100) and the through hole (411d) The conduction gap (430) formed between the conduction gaps (430) passes through the flow guiding passages disposed inside the support rod (100) and/or the surface of the support rod (100) and the output port of the membrane module ( 500) conducting;

It is characterized by:

The first end member (200) and/or the second end member (300) includes a flow guiding adapter structure (700) for adapting the connection of adjacent membrane modules thereby The output port (500) between the adjacent membrane modules is turned on.
The membrane module for water treatment according to claim 1, wherein said flow guiding adapter structure (700) comprises a flow guiding adapter (710), said flow guiding adapter (710) having a place for The first interface (711) of the flow channel connection in the membrane module, the second interface (712) as the output port (500) of the membrane module in which it is located, and the connection port (500) for the adjacent membrane module The third interface (713), the filtered water collected from the first interface (711) and the third interface (713) is collected in the cavity of the flow guiding adapter (710) and flows out from the second interface (712).
A membrane module for water treatment according to claim 2, wherein said flow guiding adapter (710) comprises a draft tube (714) disposed perpendicularly to the support rod (100), said second interface (711) and a third interface (713) are respectively disposed at both ends of the draft tube (714), and the first interface (711) is disposed on a sidewall of the draft tube (714).
The membrane module for water treatment according to claim 3, wherein the side wall of the draft tube (714) is provided with a fourth interface (715) connectable to the external water collecting device of the membrane module, A sealing cover (716) is detachably coupled to the fourth interface (715).
A membrane module for water treatment according to claim 3, wherein said draft tube (714) is a flat tube having a cross section having a length greater than a width, said width and support rod (100) The axial direction is parallel.
The membrane module for water treatment according to claim 2, wherein the flow guiding passage outputs the filtered water body through the open end of the support rod (100) of the hollow structure of the surface distribution diversion hole (110); The first interface (711) is docked at the open end of the support rod (100) and axially compresses the membrane core (400), and a sealing member is disposed between the first interface (711) and the support rod (100).
The membrane module for water treatment according to claim 2, wherein the outer portion of the flow guiding adapter (710) is provided with a membrane module end housing (720), and the membrane module end housing (720) Openings corresponding to the second interface (720) and the third interface (730) are respectively provided.
A membrane module for water treatment according to claim 1 wherein said first end member (200) and/or second end member (300) comprises an adapter connection structure (800) The adapter connection structure (800) is adapted for mating connection with a corresponding mating connection structure (800) on the first end member (200) and/or the second end member (300) of an adjacent membrane module.
A membrane module for water treatment according to claim 1, wherein an anti-offset support structure (411e) is provided in the cavity (411c) of the diaphragm (411).
A membrane module for water treatment according to claim 9, wherein said anti-offset support structure (411e) comprises a stack between said first filter membrane (411a) and said second filter membrane (411b) A support plate (411f) and an assembly hole (411g) provided on the support plate (411f) and mated with the support rod (100).
A membrane module for water treatment according to claim 10, wherein said support plate (411f) is shaped and sized to fit the cavity (411c).
A membrane module for water treatment according to claim 10, wherein said support plate (411f) is a flat plate having a thickness of 0.3 to 2 mm.
A membrane module for water treatment according to claim 10, wherein said support plate (411f) is a flat plate having a solid structure.
A membrane module for water treatment according to claim 10, wherein said support plate (411f) is made of a rigid material.
A membrane module for water treatment according to claim 10, wherein two of each membrane element (410) The side is respectively provided with a sealing ring (421); the sealing ring (421) includes a sealing ring body (421a) sleeved on the support rod (100) and is pressed and disposed on the sealing ring body (421a) and the adjacent diaphragm Sealing ring (421b) between (411); clamping force of the sealing ring (421) on both sides of the film element (410) by the supporting plate (411f) located in the diaphragm (411) of each film element (410) It is placed perpendicular to the support rod (100).
A membrane module for water treatment according to claim 1, wherein said membrane member (410) adopts a rectangular diaphragm (411) having a uniform shape and size so that the outer shape of the membrane core (400) becomes a rectangle. body.
A membrane module for water treatment according to claim 16, wherein said membrane element (410) employs a square diaphragm (411) of uniform size.
A membrane module for water treatment according to claim 17, wherein said membrane element (410) is a square membrane (411) having a length or width of 200 to 1000 mm.
A membrane module for water treatment according to any one of claims 1 to 18, characterized in that at least one membrane edge positioning device (600) is provided outside the side of the membrane core (400). The diaphragm edge positioning device (600) includes a positioning rod (610) disposed in parallel with the support rod (100) and fixed relative to the first end member (200) and/or the second end member (300) And a positioning tooth (620) disposed on the positioning rod (610) and arranged along the length of the positioning rod (610), and a positioning card corresponding to the diaphragm (411) is formed between the adjacent positioning teeth (620) The slot (630), the edge of each diaphragm (411) is respectively engaged in the corresponding positioning card slot (630).
A membrane module for water treatment according to claim 19, wherein both ends of said positioning rod (610) are mounted on the first end member (200) and the second end member (300), respectively. .
A membrane module for water treatment according to claim 20, wherein said positioning rod (610) doubles as a tie rod connecting the first end member (200) and the second end member (300) The first end member (200) second end member (300) axially compresses the membrane core (400).
A membrane module for water treatment according to claim 19, wherein two membrane edge positioning means (600) are disposed outside the opposite sides of the membrane core (400).
A membrane module for water treatment according to claim 19, wherein said positioning teeth (620) are made of a rubber material.
A membrane module for water treatment according to claim 23, wherein said positioning rod (610) comprises a mandrel (611) and a sheath (612) sheathed on the mandrel (611); said tube (612) is made of rubber and integrally formed with the positioning teeth (620).
A membrane module for water treatment according to any one of claims 1 to 18, wherein the membrane module is an MBR membrane module.