WO2020030079A1 - 一种平板膜支撑板 - Google Patents

一种平板膜支撑板 Download PDF

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Publication number
WO2020030079A1
WO2020030079A1 PCT/CN2019/099912 CN2019099912W WO2020030079A1 WO 2020030079 A1 WO2020030079 A1 WO 2020030079A1 CN 2019099912 W CN2019099912 W CN 2019099912W WO 2020030079 A1 WO2020030079 A1 WO 2020030079A1
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WO
WIPO (PCT)
Prior art keywords
support plate
honeycomb
flat film
honeycomb structure
film support
Prior art date
Application number
PCT/CN2019/099912
Other languages
English (en)
French (fr)
Inventor
陈福泰
杨艳
白立强
Original Assignee
清大国华环境集团股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201821279675.4U external-priority patent/CN209005559U/zh
Priority claimed from CN201810904223.9A external-priority patent/CN110813097B/zh
Application filed by 清大国华环境集团股份有限公司 filed Critical 清大国华环境集团股份有限公司
Priority to JP2020560388A priority Critical patent/JP6986168B2/ja
Priority to US17/048,613 priority patent/US11760669B2/en
Publication of WO2020030079A1 publication Critical patent/WO2020030079A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
    • B01D63/08—Flat membrane modules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/10—Supported membranes; Membrane supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/10—Supported membranes; Membrane supports
    • B01D69/107—Organic support material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/04—Supports for the filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2311/00—Details relating to membrane separation process operations and control
    • B01D2311/04—Specific process operations in the feed stream; Feed pretreatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2311/00—Details relating to membrane separation process operations and control
    • B01D2311/26—Further operations combined with membrane separation processes
    • B01D2311/2688—Biological processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2313/00—Details relating to membrane modules or apparatus
    • B01D2313/02—Specific tightening or locking mechanisms
    • B01D2313/025—Specific membrane holders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2313/00—Details relating to membrane modules or apparatus
    • B01D2313/06—External membrane module supporting or fixing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2315/00—Details relating to the membrane module operation
    • B01D2315/06—Submerged-type; Immersion type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/15—Supported filter elements arranged for inward flow filtration
    • B01D29/21—Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/23—Supported filter elements arranged for outward flow filtration
    • B01D29/232—Supported filter elements arranged for outward flow filtration with corrugated, folded or wound sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/18—Apparatus therefor
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/005—Black water originating from toilets
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
    • C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2307/00—Location of water treatment or water treatment device
    • C02F2307/08—Treatment of wastewater in the sewer, e.g. to reduce grease, odour
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1236—Particular type of activated sludge installations
    • C02F3/1268—Membrane bioreactor systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Definitions

  • the present application relates to the field of accessories for sewage treatment equipment, and in particular, to a flat membrane support plate.
  • Membrane bioreactor is a new high-efficiency wastewater treatment process that combines high-efficiency membrane separation technology with traditional activated sludge process.
  • the membrane separation device replaces the secondary sedimentation tank in traditional activated sludge process, which can trap a large number of microorganisms.
  • the main forms of membrane bioreactors include flat membranes, roll membranes, and hollow membranes.
  • flat membranes are one of the main forms and they are widely used.
  • the core components are flat membrane elements, and each membrane element is generally supported by a supporting plate. , Interlining and diaphragm.
  • the support plate In order to meet the requirements of large planar sizes, the support plate must have a certain rigidity, and usually a thicker support plate structure is used, which becomes a flat film
  • the main cost component of the element generally accounts for more than 70% of the cost of the membrane element. This is also a reason why the cost of the membrane element is high and the promotion is difficult. However, reducing the thickness of the plate will cause insufficient rigidity, which is not enough to make it stand upright. Support and maintain the plane;
  • Large planar membrane elements are usually positioned by the side (inserted in U-shaped grooves) to maintain the required component spacing.
  • Chinese patent document CN105984935A provides an MBR membrane element support plate, which includes a groove flow channel communicating with the water outlet device, and the groove flow
  • the channel includes a support block provided with a groove, a support bar connected to the support block, and a hollowed area located between the support bars and in communication with the groove.
  • the MBR membrane element is composed of a support block, a groove on a support bar and a hollowed area interconnecting each other to form a liquid flow channel, and the open area of the hollowed out area is small, resulting in liquid flow resistance during actual use
  • the ability to reduce the transmembrane pressure difference is limited, and the uniformity of water production on both sides of the support plate can be increased by increasing the size of the openings. Reducing the transmembrane pressure difference will affect the stability of the entire structure, causing the support plate to Strong or easily warped.
  • the technical problem to be solved in the present application is to overcome the problems of the large transmembrane pressure difference of the existing flat film support plate and the need to increase the cost of the thickened plate to meet the support strength and rigidity, and then provide a flat film support plate.
  • this application provides a flat film support plate, including:
  • honeycomb structure part the honeycomb structure part is located in an area surrounded by the connection part on the flat film support plate, and the honeycomb structure part is provided for the entire honeycomb structure part to be connected
  • a support portion is used to reinforce the honeycomb structure portion, and the support portion is disposed between the honeycomb structure portion and the connection portion.
  • the honeycomb structure part is composed of a plurality of honeycomb units having a regular shape, and the honeycomb unit is composed of an inner through hole and a hole wall portion that forms the through hole on the outer periphery and separates adjacent through holes.
  • the first flow channel is disposed on a hole wall of the honeycomb unit.
  • the first flow channel is disposed at a node of a hole wall of the adjacent honeycomb unit, and the liquid in the through holes of two adjacent honeycomb units communicate with each other through at least two of the first flow channels.
  • the first flow channel is a tapered through hole or a tapered groove, and the opening size of the first flow channel gradually decreases from the surface of the flat film support plate toward the inside.
  • the cross section of the honeycomb unit is a regular hexagon, and the first flow channel is provided at a node of a hole wall of three adjacent honeycomb units; or the cross section of the honeycomb unit is rectangular or rhombic, so The first flow channel is disposed at a node of a hole wall of four adjacent honeycomb units.
  • the supporting portion is composed of a plurality of regularly-shaped supporting units, and the supporting units are provided with second flow channels staggered in the horizontal and vertical directions and communicating with the water outlet and the through hole, and a plurality of the The support unit divides the honeycomb structure part into a plurality of interconnected honeycombs.
  • the support unit is a cross-shaped structure, at least one of the cross-shaped structure is provided, and the support unit includes a lateral spacer and a longitudinal spacer.
  • a cross section of the supporting unit is a hexagonal structure or a semi-hexagonal structure, and a plurality of the honeycomb units are partially or entirely nested in the supporting portion.
  • a stiffener is further provided between the inner periphery of the connecting portion and the outer periphery of the honeycomb structure portion, and a third flow channel is staggered along the horizontal and vertical directions and is in communication with the water outlet and the through hole. .
  • a grid-like texture is provided on the connecting portion.
  • the flat film support plate provided in the present application has holes formed in the inner area of the flat film support plate to form a honeycomb structure, so that the entire support plate maintains high stability and support strength, and can reduce the rigidity of the support plate by a large number of openings.
  • the support strength of the flat film support plate can be significantly improved, so that the flat film support plate has a thickness of 5-6 mm,
  • the possibility of warping deformation is greatly reduced, and the area of the opening can be increased to 70%; the increase of the area of the opening can not only reduce the material required for the support plate processing, save processing costs, when the hollow area of the honeycomb structure portion occupies the entire support body
  • the area is 30-70%, the corresponding production cost can be saved by 20-50%, and the cost of transportation and hoisting can also be saved;
  • the first flow channel connected to the through hole of the adjacent honeycomb unit is provided on the honeycomb unit, which not only enables
  • a single honeycomb unit can communicate with the through hole through the first flow channel, and allows the entire honeycomb structure portion to pass through in the normal and reverse directions, and the honeycomb structure Communicate with the water outlet to form a more smooth water outlet channel, and the water can be led out from the water outlet with minimum resistance, thereby facilitating
  • the liquid in the through holes of two adjacent honeycomb units communicate with each other through at least two of the first flow channels, and the plurality of first flow channels communicate with each other without affecting the support.
  • the flow resistance of the liquid is further reduced, and the circulation of the liquid is accelerated, thereby further reducing the membrane pollution; and by setting the first flow channel at the node of the hole wall of the adjacent honeycomb unit, the use of a first
  • the purpose of being able to communicate with the through-holes of adjacent honeycomb units is to make the entire honeycomb structure more smooth and reduce the impact on the rigidity of the honeycomb structure and the rigidity of the support plate.
  • the flat membrane support plate provided in this application is provided at the node through the first flow channel, and the first flow channel at the node is tapered, which can improve the strength of the support plate due to the large opening of the first flow channel, and It can slow down the situation that the opening of the liquid flow channel is too small and increase the resistance of the fluid flow to ensure a sufficient size of the liquid flow channel;
  • the first flow channel can be a through hole or a groove, and a through hole-like first flow is used
  • the size of the through hole gradually decreases from the two sides of the support plate to the inside and penetrates each other. Not only can it maintain the supporting function of the honeycomb structure at the node, but it can further balance the pressure on both sides of the flat membrane.
  • the flat membrane support plate provided in the present application communicates with the second flow channel and the water outlet and the first flow channel which are arranged on the support portion and are connected with each other in a crisscross pattern, so that the liquid on both sides of the support portion circulates with each other, which is beneficial to
  • the pressure on both sides of the supporting portion is balanced to further alleviate the membrane pollution, and it can prevent the liquid from being intercepted by the supporting portion and cause the local liquid flow resistance to increase.
  • the flat film support plate provided in the present application which comprises a plurality of cross-shaped or hexagonal structure support units to form a support portion, can greatly improve the strength and rigidity of the entire support plate, and improves the reduction of the support plate due to openings.
  • the overall strength causes the warping and deformation of the supporting plate during use, and the supporting effect of the supporting structure of the hexagonal structure is particularly significant.
  • the setting of reinforcing ribs can not only strengthen the strength of the frame of the support plate, but also can isolate the connection part from the honeycomb structure part and the connection part and the support part, avoiding the honeycomb structure part during the welding process. Or the support part may be deformed by heat to block the groove flow channel.
  • FIG. 1 is a schematic structural diagram of a flat film support plate according to an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of a honeycomb unit according to an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of a reinforcing rib provided in an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a flat film support plate according to another embodiment of the present application.
  • the periphery is used for sealingly connecting the diaphragm to the flat film supporting plate 1.
  • the diaphragm can be sealed and connected to the connecting portion 11 by using the existing welding method or bonding method.
  • At least one water outlet 111 is provided, and grid-like textures can be provided on the front and back sides of the connecting portion 11 to enhance the welding strength between the support plate and the diaphragm;
  • the honeycomb structure portion 12 is located on the flat film support In the area surrounded by the connecting portion 11 on the plate 1, the hollow area of the honeycomb structure portion 12 accounts for 30-70% of the entire area of the flat film support plate 1, so that the amount of processing materials can be reduced to reduce Cost, meanwhile, it is not easy to be deformed and warped;
  • the support portion 13 is located between the honeycomb structure portion 12 and the connection portion 11, and is used to reinforce the honeycomb structure portion 12, thereby improving support The strength of the board.
  • the honeycomb structure portion 12 is composed of a plurality of honeycomb units 120 having a regular shape.
  • the honeycomb unit 120 includes an inner through hole 121 and an outer periphery forming the through hole 121 and adjacent to each other.
  • the hole wall 122 partitioned by the through hole 121 is partially formed, and the honeycomb unit 120 is provided with a communication with the through hole 121 of the adjacent honeycomb unit 120 so as to communicate with the entire honeycomb structure portion 12 and make the honeycomb structure
  • the first flow passage 123 that is connected to the water outlet 111 by the portion 12 and the honeycomb unit 120 is provided with a first flow passage 123 that communicates with the through hole 121 of the adjacent honeycomb unit 120, so that not only a single honeycomb unit 120 can pass through the first flow passage 123 It communicates with the through hole 121, and allows the entire honeycomb structure portion 12 to pass through in the normal and reverse directions, and connects the honeycomb structure portion 12 and the water outlet 111 to form a more smooth water outlet channel, which is beneficial to
  • the inflow of liquid from the flat membrane support plate 1 into the interior of the membrane element reduces the transmembrane pressure difference, slows down membrane fouling, plays a role in increasing the membrane flux, reduces the pressure required for suction, and greatly reduce
  • first flow passage 123 is disposed on the hole wall 122 of the honeycomb unit 120, and the liquid in the through holes 121 of two adjacent honeycomb units 120 passes through at least two of the first flow passages 123 to each other. Communication, and the plurality of first flow channels 123 communicate with each other can reduce the resistance of liquid flow and accelerate the flow of liquid without affecting the support strength. In this embodiment, two adjacent honeycombs The liquid in the through hole 121 of the unit 120 communicates with each other through the two first flow channels 123.
  • first flow passage 123 is disposed at a node of the hole wall 122 of the adjacent honeycomb unit 120, and the one through flow hole 123 can be used to connect with the through holes 121 of a plurality of adjacent honeycomb units 120.
  • the purpose of interconnection is to make the whole honeycomb structure part 12 more unblocked and reduce the influence on the rigidity of the honeycomb structure and the rigidity of the support plate.
  • the cross section of the honeycomb unit 120 is a regular hexagon, a rectangle, or a rhombus.
  • the cross section of the honeycomb unit 120 is a regular hexagon, and the first flow channel 123 is provided at At the nodes of the adjacent two of the hole walls 122 of the honeycomb units 120, the liquids in the through holes 121 of the three honeycomb units 120 sharing a node communicate with each other through the first flow channel 123.
  • the cross section of the honeycomb unit 120 is rectangular or rhombic, and the first flow channel 123 is disposed at a node of the hole wall 122 of four adjacent honeycomb units 120.
  • the cross-sectional shape of the first flow channel 123 is tapered, and the opening size of the first flow channel 123 gradually decreases from the surface of the flat film support plate 1 toward the inside, which can improve the first flow channel.
  • the opening of 123 is too large, which affects the strength of the support plate, and can avoid the situation that the liquid flow path is too small and increases the fluid flow resistance, and ensure a sufficient liquid flow path size.
  • the first flow channel 123 may be a through-hole structure or a groove structure.
  • the first flow channel 123 is a groove structure, and the size of the through hole is gradually reduced from both sides of the support plate to the inside. The non-penetration can improve the supporting effect of the honeycomb structure 12 at the node.
  • the first flow channel 123 of the through-hole structure is used, and the size of the through-hole gradually decreases from both sides of the support plate to the inside, and penetrates to form an hourglass.
  • the structure can not only maintain the supporting function of the honeycomb structure portion 12 at the nodes, but also further balance the pressure on both sides of the flat membrane.
  • the supporting portion 13 is composed of a plurality of regular-shaped supporting units, and the supporting units are provided with second flow channels that are staggered in the horizontal and vertical directions and are in communication with the water outlet 111 and the through hole 121.
  • the support unit is a cross-shaped structure, and the support unit includes a plurality of honeycomb structure portions 12 divided into a plurality of honeycombs.
  • the horizontal and vertical spacers can increase the strength and rigidity of the entire support plate through the support structure 13 of the cross-shaped structure, and improve the warping deformation of the support plate during use due to the reduction of the overall strength of the support plate due to the openings. Case.
  • a cross section of the supporting unit is a hexagonal structure or a semi-hexagonal structure, and a number of the honeycomb units 120 are partially or entirely nested in
  • the support portion 13 of a hexagonal structure or a semi-hexagonal structure can improve the strength and rigidity of the entire support plate, and improve the use of the support plate due to the reduction of the overall strength of the support plate due to the opening. In the case of warping deformation.
  • a reinforcing rib 14 is further provided between the inner periphery of the connecting portion 11 and the outer periphery of the honeycomb structure portion 12.
  • the rib 14 is provided with a protrusion 142 and is located between the protrusions 142.
  • the third flow passage 141 is staggered in the horizontal and vertical directions and communicates with the water outlet 111 and the through hole 121.
  • the flat film support plate 1 in this embodiment is an ABS plate that is injection-molded at one time, and the flat film support plates 1 are not symmetrically arranged with each other.
  • first flow passage 123, the second flow passage, and the third flow passage 141 may be arranged alternately on the front and back surfaces, and the resistances on both sides are ensured to be consistent.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

一种平板膜支撑板(1)，包括连接部(11)，用于将膜片密封连接到平板膜支撑板(1)上，连接部(11)位于平板膜支撑板(1)的周边，连接部(11)上设置有至少一个出水口(111)；蜂窝状结构部(12)，蜂窝状结构部(12)位于平板膜支撑板(1)上由连接部(11)围合而成的区域内，蜂窝状结构部(12)上设置有供整个蜂窝状结构部(12)相连通且使蜂窝状结构部(12)与出水口(111)相连通的第一流道(123)；支撑部(13)，用于对蜂窝状结构部(12)进行加固，支撑部(13)设置于蜂窝状结构部(12)与连接部(11)之间。

Description

一种平板膜支撑板
相关申请的交叉引用
本申请基于申请号为：201810904223.9和201821279675.4，申请日均为2018年8月9日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本申请涉及污水处理设备配件领域，具体而言，涉及一种平板膜支撑板。
背景技术
膜生物反应器(MBR)是一种将高效膜分离技术与传统活性污泥法相结合的新型高效污水处理工艺，采用膜分离装置代替传统活性污泥法中的二沉池，可截留大量微生物，极大地丰富了系统内的微生物种类及数量，进而提高了污水处理能力和效率，从而使系统出水水质和容积负荷都得到了大幅度的提升，与传统工艺相比，具有占地面积小，出水水质稳定，污泥量少，易于操作等优点。
膜生物反应器的主要构成形式包括平板膜、卷式膜和中空膜等，其中平板膜作为一种主要形式，其应用较为广泛，核心部件为平板膜元件，每个膜元件一般又由支撑板、衬布和膜片组成。
现有的平板膜支撑板的主要不足表现在以下几个方面：(1)为满足大平面尺寸的要求，需要支撑板具有一定的刚性，通常采用较厚的支撑板结构，这就成为平板膜元件的主要成本构成，一般占到膜元件成本的70％以上，这也是造成膜元件成本较高、推广困难的一个不能忽视的原因，但降低板厚度又会造成刚性不够，不足以使其竖立支撑保持平面；(2)大平面膜元件通常是靠侧边定位(插入U型槽)保持组成元件要求间距，对于如此大的平面，即使如此厚的塑料支撑板，仅靠两侧边定位，在实际使用中不可避免会发生变形起翘，变形起翘导致相邻两片膜元件间间距在起翘部位发生变化、接触，特别是间距变小会造成膜元件间气水冲刷不均匀，产生积泥，进而造成膜面堵塞，使得出水通量下降；(3)现有竖向远大于宽度的矩形支撑板，过滤出水大都采用单一相间纵向导流凹槽导流至顶部出水，运行须采用泵抽吸出水，基本不能采用重力压差运行，造成运行能耗较高。即使采用抽吸排水，由于水压差不等的原因，膜面上下区域抽吸力客观不可能均匀，膜片的有效利用面积不高，平面上下各点抽吸力不均匀，易造成膜面污染程度不一。
基于上述现有技术缺点，为了平衡支撑板两侧的跨膜压差，中国专利文献CN105984935A提供了一种MBR膜元件支撑板，包括与出水装置相互连通的凹槽流道，所 述凹槽流道包括设置有凹槽的支撑块、与所述支撑块相连的支撑条、位于所述支撑条之间与所述凹槽相连通的镂空区域。但是，一方面，由于该种MBR膜元件是由支撑块、支撑条上的凹槽与镂空区域互相连接组成液体流道，而且镂空区域的开孔面积较小，造成实际使用过程中液体流动阻力大而能够降低跨膜压差的能力有限，而通过增大开孔大小的方式来提高支撑板两面产水的均匀性而降低跨膜压差又会影响整个结构的稳定性，造成支撑板不牢固或者易起翘变形。
虽然理论上可以通过增加支撑板厚度克服起翘变形的缺点，但由于其占构成成本较高，增厚会造成成本增加较多，更影响膜生物反应器的推广应用。另一方面，支撑板厚度增加，还将减小单位体积内有效过滤面积(相同组件厚度片数减少)，以及增加重量。因此虽然现有支撑板在使用中易变形起翘，但综合各因素实际应用厚度仍以5-6mm居多，因此上述缺点难以克服。平板膜元件支撑板厚成本高，且使用中仍易变形起翘，已成为浸没式平板膜组件使用难以逾越的障碍。
因此，对支撑板的结构加以改进，在保证支撑板的支撑强度、刚性，以及不增加支撑板加工成本的前提下，降低膜片跨膜压差是十分有必要的。
发明内容
因此，本申请要解决的技术问题在于克服现有的平板膜支撑板跨膜压差较大以及需要加厚板材提高成本才能满足支撑强度和刚性的问题，进而提供一种平板膜支撑板。
为此，本申请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。
进一步地，所述蜂窝状结构部由若干形状规则的蜂窝单元构成，所述蜂窝单元由内部的贯通孔和外周形成所述贯通孔并将相邻的贯通孔隔开的孔壁部分构成，所述第一流道设置于所述蜂窝单元的孔壁上。
进一步地，所述第一流道设置于相邻的所述蜂窝单元的孔壁的节点处，相邻的两个所述蜂窝单元的贯通孔内的液体通过至少两个所述第一流道相互连通。
进一步地，所述第一流道为锥形通孔或者锥形凹槽，所述第一流道的开孔大小自所述平板膜支撑板表面向内部的方向逐渐变小。
进一步地，所述蜂窝单元的截面为正六边形，所述第一流道设置于相邻的三个所述蜂窝单元的孔壁的节点处；或者所述蜂窝单元的截面为矩形或者菱形，所述第一流道设置于相邻的四个所述蜂窝单元的孔壁的节点处。
进一步地，所述支撑部由若干形状规则的支撑单元构成，所述支撑单元上设置有沿横向和纵向交错分布且与所述出水口和贯通孔均相连通的第二流道，若干所述支撑单元将蜂窝状结构部分割成多个相互连通的蜂窝。
进一步地，所述支撑单元为十字形结构，所述十字形结构至少设置有一个，所述支撑单元包括横向隔条和纵向隔条。
进一步地，所述支撑单元的截面为六边形结构或者半六边形结构，若干所述蜂窝单元部分或者整个嵌套于所述支撑部内。
进一步地，所述连接部内周和蜂窝状结构部的外周之间还设置有加强筋，所述加强筋上设置有沿横向和纵向交错分布且与出水口和贯通孔相互连通的第三流道。
进一步地，所述连接部上设置有网格状纹路。
本申请技术方案，具有如下优点：
1、本申请提供的平板膜支撑板，在平板膜支撑板的内部区域开孔形成蜂窝状结构，使得整个支撑板维持很高的稳定性和支撑强度，能够减少大量开孔对支撑板刚性的影响，配合所述蜂窝状结构部与所述连接部之间设置的支撑部，能够显著提高平板膜支撑板的支撑强度，使该种平板膜支撑板在厚度值为5-6mm的范围内，起翘变形的可能性大大降低，开孔面积可以提高到70％；开孔面积的增大不仅能够减少支撑板加工需要的材料，节约加工成本，当蜂窝状结构部的空心面积占整个支撑本体面积的30-70％时，对应的生产成本可节约20-50％，同时也可节省运输吊装等成本；而且通过蜂窝单元上设置与相邻蜂窝单元的贯通孔连通的第一流道，不仅使单个蜂窝单元可以通过第一流道与贯通孔相互连通，而且使整个所述蜂窝状结构部正反相贯通，且使所述蜂窝状结构部与所述出水口相连通，以形成更加畅通的出水通道，出水可以按最小阻力从出水口导出，从而有利于平板膜外液体向膜元件内部的流入，降低跨膜压差，减缓膜污染，并且起到增加膜通量的作用，减小抽吸出水所需压力，进而大幅度降低系统运行能耗。
2、本申请提供的平板膜支撑板，相邻的两个所述蜂窝单元的贯通孔内的液体通过至少两个所述第一流道相互连通，多个第一流道相互连通能够在不影响支撑强度的前提下，进一步降低液体的流动阻力，加速液体的流通，从而进一步减缓膜污染；而且通过将第一流道设置于相邻的所述蜂窝单元的孔壁的节点处，能够实现使用一个第一流道即 可与相邻的多个蜂窝单元的贯通孔相互连通的目的，使整个蜂窝状结构部更加畅通的同时降低了对蜂窝结构的牢固性以及支撑板刚性的影响。
3、本申请提供的平板膜支撑板，通过第一流道设置于节点处，而且节点处的第一流道呈锥形，既可以改善因第一流道开孔过大而影响支撑板的强度，又可以减缓液体流道开孔过小而增大流体流动阻力的情况发生，保证足够的液体流道大小；所述第一流道可以为通孔，也可以为凹槽，使用通孔状的第一流道，通孔的大小从支撑板的两侧向内部逐渐缩小，相互贯通，不仅能够维持蜂窝状结构部在节点处的支撑作用，而且能够进一步平衡平板膜两侧的压力。
4、本申请提供的平板膜支撑板，通过支撑部上设置的彼此连通的纵横交错设置的第二流道与出水口和第一流道相互连通，使得支撑部两侧的液体相互流通，有利于平衡支撑部两侧的压力，进一步缓解膜污染，而且能够防止液体被支撑部截流而导致局部液体流动阻力增大。
5、本申请提供的平板膜支撑板，通过多个十字形结构或者六边形结构的支撑单元构成支撑部，能够极大提高整个支撑板的强度和刚性，改善了因开孔而降低支撑板整体的强度而造成支撑板使用过程中发生翘边变形的情况，其中六边形结构的支撑单元的支撑效果尤为显著。
6、本申请提供的平板膜支撑板，加强筋的设置不仅能够加强支撑板的边框的强度，而且能够隔离连接部与蜂窝状结构部以及连接部与支撑部，避免焊接过程中蜂窝状结构部或者支撑部受热变形而阻塞凹槽流道的情况发生。
附图说明
为了更清楚地说明本申请具体实施方式或现有技术中的技术方案，下面将对具体实施方式或现有技术描述中所需要使用的附图作简单地介绍。
图1为本申请实施方式提供的平板膜支撑板的结构示意图。
图2是本申请实施方式提供的蜂窝状单元的结构示意图；
图3是本申请实施方式提供的加强筋的结构示意图；
图4为本申请另一实施方式提供的平板膜支撑板的结构示意图。
其中，附图标记如下所示：
1、平板膜支撑板；11、连接部；111、出水口；12、蜂窝状结构部；120、蜂窝单元；121、贯通孔；122、孔壁、123、第一流道；13、支撑部；14、加强筋；141、第三流道；142、凸起。
具体实施方式
下面将结合附图对本申请的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
在本申请的描述中，需要说明的是，术语“内”、“外”、“上”、“下”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。
实施例：如图1所示的平板膜支撑板，所述平板膜支撑板1包括连接部11、蜂窝状结构部12和支撑部13，其中所述连接部11位于所述平板膜支撑板1的周边，用于将过膜片密封连接到所述平板膜支撑板1上，可采用现有技术的焊接方式或者粘结方式将膜片密封连接到连接部11上，所述连接部11上设置有至少一个出水口111，所述连接部11的正反两面上均可以设置网格状纹路，能够加强支撑板与膜片的焊接强度；所述蜂窝状结构部12位于所述平板膜支撑板1上由所述连接部11围合而成的区域内，所述蜂窝状结构部12的空心面积占整个平板膜支撑板1面积的30-70％，使得能够减少加工材料的用量以降低成本，同时也不易出现变形翘起的情况；所述支撑部13位于所述蜂窝状结构部12与所述连接部11之间，用于对所述蜂窝状结构部12进行加固，进而提高支撑板的强度。
具体地，如图2所示，所述蜂窝状结构部12由若干形状规则的蜂窝单元120构成，所述蜂窝单元120由内部的贯通孔121和外周形成所述贯通孔121并将相邻的贯通孔121隔开的孔壁122部分构成，所述蜂窝单元120上设置有与相邻蜂窝单元120的贯通孔121连通以供整个所述蜂窝状结构部12相连通且使所述蜂窝状结构部12与所述出水口111相连通的第一流道123，蜂窝单元120上设置与相邻蜂窝单元120的贯通孔121连通的第一流道123，不仅使单个蜂窝单元120可以通过第一流道123与贯通孔121相互连通，而且使整个所述蜂窝状结构部12正反相贯通，且使所述蜂窝状结构部12与所述出水口111相连通，以形成更加畅通的出水通道，有利于平板膜支撑板1外液体向膜元件内部的流入，降低跨膜压差，减缓膜污染，起到增加膜通量的作用，减小抽吸所需 压力，进而大幅度降低系统运行能耗。
进一步地，所述第一流道123设置于所述蜂窝单元120的孔壁122上，相邻的两个所述蜂窝单元120的贯通孔121内的液体通过至少两个所述第一流道123相互连通，多个第一流道123相互连通能够在不影响支撑强度的前提下，降低液体的流动阻力，加速液体的流通，从而进一步减缓膜污染，本实施例中，相邻的两个所述蜂窝单元120的贯通孔121内的液体通过两个所述第一流道123相互连通。
进一步地，所述第一流道123设置于相邻的所述蜂窝单元120的孔壁122的节点处，能够实现使用一个第一流道123即可与相邻的多个蜂窝单元120的贯通孔121相互连通的目的，使整个蜂窝状结构部12更加畅通的同时降低了对蜂窝结构的牢固性以及支撑板刚性的影响。
在本申请的一些实施例中，所述蜂窝单元120的截面为正六边形、矩形或者菱形，本实施例中，所述蜂窝单元120的截面为正六边形，所述第一流道123设置于相邻的三个所述蜂窝单元120的孔壁122的节点处，这三个共用一个节点的所述蜂窝单元120的贯通孔121内的液体通过所述第一流道123相互连通，当所述蜂窝单元120的截面为矩形或者菱形，所述第一流道123设置于相邻的四个所述蜂窝单元120的孔壁122的节点处。
进一步地，所述第一流道123的截面形状呈锥形，所述第一流道123的开孔大小自所述平板膜支撑板1表面向内部的方向逐渐变小，既可以改善因第一流道123的开孔过大而影响支撑板的强度，又可以避免液体流道的过小而增大流体流动阻力的情况发生，保证足够的液体流道大小。
此外，所述第一流道123可以为通孔结构，也可以为凹槽结构，本实施例中，第一流道123采用凹槽结构，其通孔的大小从支撑板的两侧向内部逐渐缩小，不贯通，能够提高蜂窝状结构部12在节点处的支撑作用，而使用通孔结构的第一流道123，其通孔的大小从支撑板的两侧向内部逐渐缩小，相互贯通，形成沙漏状结构，不仅能够维持蜂窝状结构部12在节点处的支撑作用，而且能够进一步平衡平板膜两侧的压力。
进一步地，所述支撑部13由若干形状规则的支撑单元构成，所述支撑单元上设置有沿横向和纵向交错分布且与所述出水口111和贯通孔121均相连通的第二流道。
在一些实施例中，如图1所示，作为所述支撑部13的一种具体实施方式，所述支撑单元为十字形结构，所述支撑单元包括若干将蜂窝状结构部12分割成若干蜂窝的横向隔条和纵向隔条，通过十字形结构的支撑部13能够提高整个支撑板的强度和刚性，改善了因开孔而降低支撑板整体的强度而造成支撑板使用过程中发生翘边变形的情况。
如图4所示，作为所述支撑部13的另一种具体实施方式，所述支撑单元的截面为 六边形结构或者半六边形结构，若干所述蜂窝单元120部分或者整个嵌套于所述支撑部13内，通过六边形结构或者半六边形结构的支撑部13能够提高整个支撑板的强度和刚性，改善了因开孔而降低支撑板整体的强度而造成支撑板使用过程中发生翘边变形的情况。
此外，如图3所示，所述连接部11内周和蜂窝状结构部12的外周之间还设置有加强筋14，所述加强筋14上设置有凸起142和位于凸起142之间的第三流道141，所述第三流道141沿横向和纵向交错分布且与出水口111和贯通孔121相互连通。
进一步地，所述连接部11上设置有网格状纹路。
具体地，本实施例中的平板膜支撑板1为一次注塑成型的ABS板，且该种平板膜支撑板1非相互对称设置。
进一步地，所述第一流道123、第二流道和第三流道141可以为正反面交错设置，且保证两面的阻力一致。
显然，上述实施例仅仅是为清楚地说明所作的举例，而并非对实施方式的限定。对于所属领域的普通技术人员来说，在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。而由此所引伸出的显而易见的变化或变动仍处于本申请创造的保护范围之中。

Claims (10)

  1. 一种平板膜支撑板，其特征在于，包括：
    连接部(11)，用于将膜片密封连接到所述平板膜支撑板(1)上，所述连接部(11)位于所述平板膜支撑板(1)的周边，所述连接部(11)上设置有至少一个出水口(111)；
    蜂窝状结构部(12)，所述蜂窝状结构部(12)位于所述平板膜支撑板(1)上由所述连接部(11)围合而成的区域内，所述蜂窝状结构部(12)上设置有供整个所述蜂窝状结构部(12)相连通且使所述蜂窝状结构部(12)与所述出水口(111)相连通的第一流道(123)，所述蜂窝状结构部(12)的空心面积占整个平板膜支撑板(1)面积的30-70％；
    支撑部(13)，用于对所述蜂窝状结构部(12)进行加固，所述支撑部(13)设置于所述蜂窝状结构部(12)与所述连接部(11)之间。
  2. 根据权利要求1所述的平板膜支撑板，其特征在于，所述蜂窝状结构部(12)由若干形状规则的蜂窝单元(120)构成，所述蜂窝单元(120)由内部的贯通孔(121)和外周形成所述贯通孔(121)并将相邻的贯通孔(121)隔开的孔壁(122)构成，所述第一流道(123)设置于所述蜂窝单元(120)的孔壁(122)上。
  3. 根据权利要求2所述的平板膜支撑板，其特征在于，所述第一流道(123)设置于相邻的所述蜂窝单元(120)的孔壁(122)的节点处，相邻的两个所述蜂窝单元(120)的贯通孔(121)内的液体通过至少两个所述第一流道(123)相互连通。
  4. 根据权利要求3所述的平板膜支撑板，其特征在于，所述第一流道(123)为锥形通孔或者锥形凹槽，所述第一流道(123)的开孔大小自所述平板膜支撑板(1)表面向内部的方向逐渐变小。
  5. 根据权利要求1-4中任一项所述的平板膜支撑板，其特征在于，所述蜂窝单元(120)的截面为正六边形，所述第一流道(123)设置于相邻的三个所述蜂窝单元(120)的孔壁(122)的节点处；或者所述蜂窝单元(120)的截面为矩形或者菱形，所述第一流道(123)设置于相邻的四个所述蜂窝单元(120)的孔壁(122)的节点处。
  6. 根据权利要求1-5中任一项所述的平板膜支撑板，其特征在于，所述支撑部(13)由至少一个形状规则的支撑单元构成，所述支撑单元上设置有沿横向和纵向交错分布且与所述出水口(111)和贯通孔(121)均相连通的第二流道，若干所述支撑单元将蜂窝状结构部(12)分割成多个相互连通的蜂窝。
  7. 根据权利要求6所述的平板膜支撑板，其特征在于，所述支撑单元为十字形结构，十字结构至少设置有一个，所述支撑单元包括横向隔条和纵向隔条。
  8. 根据权利要求6或7所述的平板膜支撑板，其特征在于，所述支撑单元的截面为六边形结构或者半六边形结构，若干所述蜂窝单元(120)部分或者整个嵌套于所述支撑部(13) 内。
  9. 根据权利要求1-8中任一项所述的平板膜支撑板，其特征在于，所述连接部(11)内周和蜂窝状结构部(12)的外周之间还设置有加强筋(14)，所述加强筋(14)上设置有沿横向和纵向交错分布且与出水口(111)和贯通孔(121)相互连通的第三流道(141)。
  10. 根据权利要求1-9中任一项所述的平板膜支撑板，其特征在于，所述连接部(11)上设置有网格状纹路。
PCT/CN2019/099912 2018-08-09 2019-08-09 一种平板膜支撑板 WO2020030079A1 (zh)

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