阅读说明：本技术 一种平板膜支撑板 (Flat membrane supporting plate ) 是由 陈福泰 杨艳 白立强 于 2018-08-09 设计创作，主要内容包括：本发明提供了一种平板膜支撑板,包括：连接部,用于将膜片密封连接到所述平板膜支撑板上,所述连接部位于所述平板膜支撑板的周边,所述连接部上设置有至少一个出水口；蜂窝状结构部,所述蜂窝状结构部位于所述平板膜支撑板上由所述连接部围合而成的区域内,所述蜂窝状结构部上设置有供整个所述蜂窝状结构部相连通且使所述蜂窝状结构部与所述出水口相连通的第一流道,所述蜂窝状结构部的空心面积占整个平板膜支撑板面积的30-70％；支撑部,用于对所述蜂窝状结构部进行加固,所述支撑部设置于所述蜂窝状结构部与所述连接部之间。本发明的有益效果在于能够降低平板膜支撑板两面跨膜压差,减缓膜污染的同时减少成本,满足支撑强度和刚性的需求。(The present invention provides a flat membrane support plate comprising: the connecting part is used for connecting the membrane to the flat membrane supporting plate in a sealing way, is positioned at the periphery of the flat membrane supporting plate and is provided with at least one water outlet; the honeycomb structure part is positioned in an area which is formed by enclosing the connecting part on the flat membrane supporting plate, a first flow channel which is used for communicating the whole honeycomb structure part and communicating the honeycomb structure part with the water outlet is arranged on the honeycomb structure part, and the hollow area of the honeycomb structure part accounts for 30-70% of the area of the whole flat membrane supporting plate; and the supporting part is used for reinforcing the honeycomb structure part and is arranged between the honeycomb structure part and the connecting part. The invention has the advantages of reducing transmembrane pressure difference on two sides of the flat membrane supporting plate, reducing cost while slowing down membrane pollution, and meeting the requirements of supporting strength and rigidity.)

1. A flat sheet membrane support plate, comprising:

the connecting part (11) is used for connecting the membrane to the flat membrane supporting plate (1) in a sealing mode, the connecting part (11) is located on the periphery of the flat membrane supporting plate (1), and at least one water outlet (111) is formed in the connecting part (11);

the honeycomb structure part (12) is positioned in an area which is formed by enclosing the connecting part (11) on the flat membrane support plate (1), a first flow channel (123) which is used for communicating the whole honeycomb structure part (12) and enables the honeycomb structure part (12) to be communicated with the water outlet (111) is arranged on the honeycomb structure part (12), and the hollow area of the honeycomb structure part (12) accounts for 30-70% of the area of the whole flat membrane support plate (1);

a support portion (13) for reinforcing the honeycomb-shaped structural portion (12), the support portion (13) being provided between the honeycomb-shaped structural portion (12) and the connecting portion (11).

2. The flat membrane support plate according to claim 1, wherein the honeycomb-shaped structure portion (12) is formed of a plurality of regularly shaped honeycomb cells (120), the honeycomb cells (120) are formed of inner through-holes (121) and cell walls (122) having outer peripheries forming the through-holes (121) and separating adjacent through-holes (121), and the first flow channels (123) are provided on the cell walls (122) of the honeycomb cells (120).

3. The flat-sheet membrane support plate according to claim 2, wherein the first flow channels (123) are provided at nodes of cell walls (122) of adjacent honeycomb cells (120), and liquids in through-holes (121) of adjacent two honeycomb cells (120) are communicated with each other through at least two of the first flow channels (123).

4. The flat sheet membrane support plate according to claim 3, wherein the first flow channels (123) are tapered through holes or tapered grooves, and the size of the openings of the first flow channels (123) is gradually reduced from the surface of the flat sheet membrane support plate (1) to the inner direction.

5. The flat-sheet membrane support plate according to any one of claims 1 to 4, wherein the cross-section of the honeycomb cells (120) is a regular hexagon, and the first flow channels (123) are disposed at nodes of cell walls (122) of three adjacent honeycomb cells (120); or the cross section of the honeycomb unit (120) is rectangular or rhombic, and the first flow channel (123) is arranged at the node of the hole wall (122) of the adjacent four honeycomb units (120).

6. The flat membrane support plate according to any one of claims 1 to 4, wherein the support portion (13) is formed of at least one regularly shaped support unit having second flow channels arranged in a staggered manner in the transverse and longitudinal directions and communicating with both the water outlet (111) and the through-holes (121), and wherein the plurality of support units divide the honeycomb structure portion (12) into a plurality of interconnected cells.

7. The flat-sheet membrane support plate according to claim 6, wherein the support elements are of a cross-shaped configuration, at least one of the cross-shaped configuration being provided, the support elements comprising transverse and longitudinal spacers.

8. The flat-sheet membrane support plate according to claim 6, wherein the cross-section of said support unit is a hexagonal structure or a semi-hexagonal structure, and a plurality of said honeycomb units (120) are partially or entirely nested in said support portion (13).

9. The flat membrane support plate according to any one of claims 1 to 4, wherein a reinforcing rib (14) is further disposed between the inner periphery of the connecting portion (11) and the outer periphery of the honeycomb structural portion (12), and the reinforcing rib (14) is provided with third flow channels (141) which are distributed in a staggered manner in the transverse direction and the longitudinal direction and are communicated with the water outlet (111) and the through hole (121).

10. The flat sheet membrane support plate according to any one of claims 1-4, wherein the connection portion (11) is provided with a grid-like texture.

Technical Field

The invention relates to the field of sewage treatment equipment accessories, in particular to a flat membrane support plate.

Background

Membrane Bioreactor (MBR) is a novel high-efficient sewage treatment process that combines together high-efficient membrane separation technique and traditional activated sludge process, adopt membrane separation device to replace two heavy ponds in the traditional activated sludge process, can hold back a large amount of microorganisms, greatly richened the microorganism kind and the quantity in the system, and then improved sewage treatment ability and efficiency, thereby make system's play water quality of water and volume load all obtain promotion by a wide margin, compare with traditional process, it is little to have an area, it is stable to go out water quality of water, the sludge quantity is few, advantages such as easy operation.

The main forming forms of the membrane bioreactor comprise a flat membrane, a roll-type membrane, a hollow membrane and the like, wherein the flat membrane is used as a main form and is widely applied, the core component is a flat membrane element, and each membrane element generally comprises a support plate, lining cloth and a membrane sheet.

The main disadvantages of the existing flat membrane support plate are shown in the following aspects: (1) in order to meet the requirement of large plane size, the support plate is required to have certain rigidity, a thicker support plate structure is usually adopted, which is the main cost of the flat membrane element and generally accounts for more than 70% of the cost of the membrane element, which is a non-negligible reason for causing higher cost and difficult popularization of the membrane element, but the rigidity is insufficient due to the reduction of the thickness of the plate, and the support plate is not enough to be erected to support and maintain a plane; (2) the large plane membrane element is usually positioned by the side edge (inserted into a U-shaped groove) to keep the required spacing of the component elements, for the large plane, even if the plastic support plate with the thickness is positioned by the two side edges, deformation and upwarp are inevitable in practical use, the deformation and upwarp cause the variation and contact of the spacing between two adjacent membrane elements at the upwarp position, especially the reduction of the spacing causes the uneven air water scouring between the membrane elements to generate mud accumulation, further cause the membrane surface blockage, and reduce the water outlet flux; (3) the existing vertical rectangular supporting plate far larger than the width is used for filtering effluent, a single-phase longitudinal flow guide groove is used for guiding the effluent to the top, a pump is used for pumping the effluent during operation, gravity pressure difference operation cannot be basically adopted, and operation energy consumption is high. Even if suction drainage is adopted, the suction force of the upper area and the lower area of the membrane surface cannot be objective and uniform due to unequal water pressure difference, the effective utilization area of the membrane is not high, the suction force of the upper point and the lower point of the plane is not uniform, and the pollution degree of the membrane surface is easy to be different.

Based on the above disadvantages of the prior art, in order to balance transmembrane pressure difference on two sides of the support plate, chinese patent document CN105984935A provides an MBR membrane element support plate, which includes a groove flow channel communicated with a water outlet device, wherein the groove flow channel includes a support block provided with a groove, support bars connected with the support block, and a hollow area located between the support bars and communicated with the groove. On the one hand, the MBR membrane element is formed by mutually connecting the grooves on the supporting block and the supporting bar with the hollow area to form a liquid flow channel, and the opening area of the hollow area is small, so that the liquid flow resistance is large in the actual use process, the capability of reducing transmembrane pressure difference is limited, the uniformity of water production on two sides of the supporting plate is improved in a mode of increasing the size of the opening, the transmembrane pressure difference is reduced, the stability of the whole structure is influenced, and the supporting plate is not firm or is easy to warp and deform.

Although the defect of warping deformation can be overcome by increasing the thickness of the supporting plate in theory, the cost is increased greatly due to the fact that the supporting plate occupies higher composition cost, and the popularization and the application of the membrane bioreactor are influenced more. On the other hand, the increased thickness of the support plate will also reduce the effective filtration area per unit volume (reduced number of pieces of the same module thickness), and increase the weight. Therefore, although the existing supporting plate is easy to deform and warp in use, the practical application thickness is still more than 5-6mm by combining all factors, so the defects are difficult to overcome. The flat membrane element has high supporting plate thickness cost and is easy to deform and warp in use, and the flat membrane element becomes an obstacle that the use of an immersion type flat membrane element is difficult to exceed.

Therefore, it is necessary to improve the structure of the supporting plate to reduce the transmembrane pressure difference of the membrane without increasing the processing cost of the supporting plate and ensuring the supporting strength and rigidity of the supporting plate.

Disclosure of Invention

Therefore, the technical problem to be solved by the present invention is to overcome the problems of the existing flat membrane support plate that the transmembrane pressure difference is large and the cost is increased by adding thick plates to meet the support strength and rigidity, and further to provide a flat membrane support plate.

To this end, the present invention provides a flat membrane support plate comprising:

the connecting part is used for connecting the membrane to the flat membrane supporting plate in a sealing way, is positioned at the periphery of the flat membrane supporting plate and is provided with at least one water outlet;

the honeycomb structure part is positioned in an area which is formed by enclosing the connecting part on the flat membrane supporting plate, a first flow channel which is used for communicating the whole honeycomb structure part and communicating the honeycomb structure part with the water outlet is arranged on the honeycomb structure part, and the hollow area of the honeycomb structure part accounts for 30-70% of the area of the whole flat membrane supporting plate;

and the supporting part is used for reinforcing the honeycomb structure part and is arranged between the honeycomb structure part and the connecting part.

Further preferably, the honeycomb structural portion is formed of a plurality of regularly shaped honeycomb cells each including an inner through hole and a cell wall portion having an outer periphery forming the through hole and separating adjacent through holes, and the first flow channel is provided in a cell wall of the honeycomb cell.

Further preferably, the first flow channels are disposed at nodes of the hole walls of the adjacent honeycomb units, and the liquids in the through holes of the adjacent two honeycomb units are communicated with each other through at least two first flow channels.

Further preferably, the first flow channel is a tapered through hole or a tapered groove, and the size of the opening of the first flow channel gradually decreases from the surface of the flat membrane support plate to the inner direction.

Further preferably, the cross section of the honeycomb unit is a regular hexagon, and the first flow channel is arranged at a node of the hole wall of the adjacent three honeycomb units; or the cross section of the honeycomb unit is rectangular or rhombic, and the first flow channel is arranged at the node of the hole wall of the adjacent four honeycomb units.

Further preferably, the supporting part is composed of a plurality of supporting units with regular shapes, the supporting units are provided with second flow channels which are distributed in a staggered mode along the transverse direction and the longitudinal direction and communicated with the water outlets and the through holes, and the honeycomb structure part is divided into a plurality of mutually communicated honeycombs by the supporting units.

Further preferably, the supporting unit is a cross-shaped structure, the cross-shaped structure is provided with at least one, and the supporting unit comprises a transverse division bar and a longitudinal division bar.

Further preferably, the cross section of the supporting unit is a hexagonal structure or a semi-hexagonal structure, and a plurality of honeycomb units are partially or wholly nested in the supporting part.

Further preferably, a reinforcing rib is further arranged between the inner periphery of the connecting portion and the outer periphery of the honeycomb structural portion, and third flow channels which are distributed in a staggered mode in the transverse direction and the longitudinal direction and communicated with the water outlet and the through holes are formed in the reinforcing rib.

Further preferably, the connecting portion is provided with a grid-shaped texture.

The technical scheme of the invention has the following advantages:

1. according to the flat membrane supporting plate provided by the invention, the inner area of the flat membrane supporting plate is perforated to form the honeycomb structure, so that the whole supporting plate maintains high stability and supporting strength, the influence of a large number of holes on the rigidity of the supporting plate can be reduced, the supporting strength of the flat membrane supporting plate can be obviously improved by matching with the supporting part arranged between the honeycomb structure part and the connecting part, the possibility of warping deformation of the flat membrane supporting plate is greatly reduced within the range of 5-6mm, and the area of the perforated hole can be increased to 70%; the increase of the opening area can not only reduce the materials needed by the processing of the supporting plate and save the processing cost, but also save the corresponding production cost by 20 to 50 percent when the hollow area of the honeycomb structural part accounts for 30 to 70 percent of the area of the whole supporting body and also save the costs of transportation, hoisting and the like; and through the first runner that sets up on the honeycomb unit and the perforating hole intercommunication of adjacent honeycomb unit, not only make single honeycomb unit communicate with each other through first runner and perforating hole, make whole moreover honeycomb structure portion just makes honeycomb structure portion with the delivery port is linked together to form more unblocked play water passageway, it can be derived from the delivery port according to minimum resistance to go out, thereby be favorable to the flow-in of the outer liquid of dull and stereotyped membrane to the inside of membrane element, reduce transmembrane pressure difference, slow down membrane pollution, and play the effect that increases membrane flux, reduce and pump the required pressure of water, and then reduce system operation energy consumption by a wide margin.

2. According to the flat membrane support plate provided by the invention, the liquid in the through holes of two adjacent honeycomb units is mutually communicated through at least two first flow channels, and the plurality of first flow channels are mutually communicated, so that the flow resistance of the liquid can be further reduced and the circulation of the liquid can be accelerated on the premise of not influencing the support strength, and thus the membrane pollution is further slowed down; and through setting up first flow channel in the node of the pore wall of adjacent honeycomb unit, can realize using one first flow channel can with the purpose of the through-hole intercommunication of a plurality of adjacent honeycomb units, reduced the influence to honeycomb structure's fastness and backup pad rigidity when making whole honeycomb structure portion more unblocked.

3. The flat membrane support plate provided by the invention is arranged at the node through the first flow channel, and the first flow channel at the node is conical, so that the influence on the strength of the support plate due to overlarge open pore of the first flow channel can be improved, the situation that the flow resistance of fluid is increased due to undersize open pore of the liquid flow channel can be relieved, and the sufficient size of the liquid flow channel is ensured; the first flow channel can be a through hole or a groove, the size of the through hole is gradually reduced from two sides of the support plate to the inside and the through hole is communicated with each other, so that the support effect of the honeycomb structure part at the node can be maintained, and the pressure on two sides of the flat membrane can be further balanced.

4. According to the flat membrane supporting plate provided by the invention, the second flow channels which are communicated with each other and are arranged in a criss-cross manner, the water outlets and the first flow channels are communicated with each other, so that liquid on two sides of the supporting part can be communicated with each other, the pressure on two sides of the supporting part can be balanced, membrane pollution can be further relieved, and the increase of local liquid flow resistance caused by the interception of the liquid by the supporting part can be prevented.

5. According to the flat membrane support plate provided by the invention, the support part is formed by the support units with the cross structures or the hexagonal structures, so that the strength and the rigidity of the whole support plate can be greatly improved, the situation that the support plate is warped and deformed in the use process due to the fact that the strength of the whole support plate is reduced due to the opening is improved, and the support effect of the support units with the hexagonal structures is particularly obvious.

6. According to the flat membrane supporting plate provided by the invention, the arrangement of the reinforcing ribs not only can enhance the strength of the frame of the supporting plate, but also can isolate the connecting part from the honeycomb structure part and the connecting part from the supporting part, so that the situation that the honeycomb structure part or the supporting part is deformed by heating to block the groove flow channel in the welding process is avoided.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below.

Fig. 1 is a schematic structural diagram of a flat membrane support plate according to an embodiment of the present invention.

FIG. 2 is a schematic structural view of a honeycomb unit provided in an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a reinforcing bar according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a flat membrane support plate according to another embodiment of the present invention;

wherein the reference numerals are as follows:

1. a flat membrane support plate; 11. a connecting portion; 111. a water outlet; 12. a honeycomb structure portion; 120. a cellular unit; 121. a through hole; 122. the hole wall 123 and the first flow channel; 13. a support portion; 14. reinforcing ribs; 141. a third flow path; 142. and (4) protruding.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "connected" and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.