Flat sheet membrane assembly with plug-in type cluster combination modular structure

Abstract

The utility model discloses a flat sheet membrane assembly with a plug-in type cluster combination modular structure, which preferably comprises a hollow flat sheet membrane assembly body, an upper connecting piece, a lower connecting piece, a rubber division bar, a groove-shaped plate and an O-shaped sealing ring, a plurality of hollow flat diaphragm assemblies with the same specification are arranged in parallel at intervals along the thickness direction of the hollow flat diaphragm assemblies to form a group, the upper ends of the hollow flat diaphragm assemblies are inserted into holes of the upper connecting piece and are detachably connected in parallel through O-shaped sealing rings, and the lower ends of the hollow flat diaphragm assemblies are embedded into the lower connecting piece through rubber division bars to be detachably connected in parallel; groove-shaped plates are symmetrically embedded in the side faces between the upper connecting piece and the lower connecting piece, and detachable connection is formed, so that a plurality of hollow flat plate membrane assemblies are bundled into an integral combined structure. In a preferred second scheme, except for all the structures in the first scheme, the device further comprises a water collecting box connected to the upper connecting piece. The utility model provides two preferable schemes, so that the installation mode is more flexible, and the adaptability is stronger.

Description

Technical Field

[0001] This utility model relates to a filtration device for solid-liquid separation, specifically a flat sheet membrane assembly with a plug-in bundled modular structure. Background Technology

[0002] Wastewater containing suspended solids and particulate matter is generated during the production processes of industrial and mining enterprises such as metallurgy, chemical industry, building materials, power, and mining. The main method for purifying this wastewater is through filtration to separate the solid-liquid mixture. Currently, the most commonly used fine filtration media are various organic and inorganic membranes. In terms of their structural design, hollow flat sheet membranes are the most widely used.

[0003] A hollow sheet membrane is a plate-like structure with an outer membrane layer and several through-holes running parallel along its width and extending through its length. In practical applications, the membrane sheets are sealed at both ends with plugs, and a tubular interface is opened on one end of the plug, with the center hole of the interface communicating with the internal holes. Each membrane's interface is connected to a water collection pipe via a quick connector, which is then connected to the system's main water pipe. This type of membrane filtration unit is only suitable for operation under negative pressure suction. During backwashing, the pressurized water from the main pipe is distributed to each membrane sheet through the water collection pipe, resulting in uneven distribution and high resistance, limiting the backwash water volume and pressure, and leading to poor backwashing performance. Furthermore, each membrane sheet has only one interface, resulting in a considerable amount of on-site installation work.

[0004] To overcome the aforementioned drawbacks, the inventors of this utility model disclosed a nested, clustered, modular flat-panel membrane module in patent number 201920582719.9. Its main feature is that the two ends of the flat-panel membrane are fixed with upper and lower plugs to form flat-panel membrane elements. Several flat-panel membrane elements of the same specifications are arranged along their thickness direction and embedded in the straight groove of the upper connector to achieve clustering. This structure uses membrane modules instead of membrane sheets to assemble the filter unit, greatly reducing the installation workload, significantly increasing the filtration flux, and improving the backwashing effect. It can operate under both positive and negative pressure conditions. However, each membrane sheet in the group needs to be glued into the groove of the upper connector. After gluing, the grouped membrane sheets and the upper connector become fixedly connected, and during use, the glue joint is prone to delamination, causing leakage. In addition, the membrane sheets need to be inspected before being glued into a group, which requires tooling, and it is difficult to detect membrane defects. Once the components are glued together or during use, if one component is found to be damaged, replacing it can be quite difficult. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a flat sheet membrane module that has a reasonable structure, is easy to install and maintain, has a larger filtration flux, better filtration effect, and higher backwashing effect.

[0006] The technical solution provided by this utility model is as follows:

[0007] In the first preferred embodiment, a plug-in type bundled modular structure flat sheet membrane assembly includes a hollow flat sheet membrane assembly, an upper connector, a lower connector, a rubber spacer, a grooved plate, and an O-ring seal. Several hollow flat sheet membrane assemblies of the same specification are arranged side by side at intervals along their thickness direction. The upper ends are inserted into the holes of the upper connector and are detachably connected in parallel by the O-ring seals. The lower ends are embedded in the lower connector by the rubber spacer and are detachably connected in parallel. The upper connector and the lower connector are symmetrically embedded in the grooved plate on the side and form a detachable connection, so that several hollow flat sheet membrane assemblies are bundled into an integral combined structure.

[0008] In the first preferred embodiment, the hollow flat diaphragm assembly includes an upper plug, a flat diaphragm, and a lower plug, with the upper plug and lower plug respectively installed at both ends of the flat diaphragm.

[0009] In the first preferred embodiment, the upper plug is a thin-walled, flat, hollow structure with a flat straight groove at one end for easy insertion of the diaphragm and a cylindrical insertion port with a central hole at the other end. The cylindrical surface of the insertion port has an annular groove for easy insertion of an O-ring seal. After the flat diaphragm is inserted into the flat straight groove, a water collection groove is formed between the cylindrical insertion port and the flat straight groove. The central hole of the insertion port communicates with the inner hole of the flat diaphragm through the water collection groove.

[0010] In the first preferred embodiment, the lower plug is a thin-walled, flat, hollow structure with a flat straight groove at only one end, which facilitates the insertion of a diaphragm to seal the inner hole.

[0011] In the first preferred embodiment, the upper connector is a flange structure, which is a rectangular block with a stepped edge. The stepped surface of the edge is the flange mounting surface, and several cylindrical holes are opened in two parallel rows on the rectangular block.

[0012] In the first preferred embodiment, two adjacent holes on the rectangular block of the upper connector are offset from the center line of the membrane width direction by the same distance and are located on the left and right sides of the center line, respectively. The hole diameter is adapted to the upper plug of the flat membrane assembly for the upper plug to be inserted, and an insert-type sealing structure is formed by an "O" ring.

[0013] In the first preferred embodiment, the lower connector is a rectangular block with a hollow structure, and a circular boss is provided at its lower part for positioning.

[0014] In the second preferred embodiment, in addition to all the structures described in the first preferred embodiment, a water collection box is also included. The water collection box is detachably installed on the upper end of the upper connecting part, and the inner cavity of the water collection box is connected to the water outlet of each flat diaphragm.

[0015] In the second preferred embodiment, the water collection box is a semi-enclosed cavity with a flange structure, the flange is connected to the upper connector, and the upper end of the water collection box is provided with a plug-in water outlet.

[0016] Compared with the prior art, the present invention has the following beneficial effects.

[0017] (1) The single flat sheet membrane assembly described in this utility model adopts an insert type, which greatly facilitates the installation and disassembly of the flat sheet membrane. The flat sheet membrane assembly with water collection box is equipped with an insert-type water outlet, which also facilitates the installation and disassembly of the flat sheet membrane assembly. For membrane filtration units and filtration systems with large processing capacity, the number of membranes used is in the tens of thousands. If a very small number of membranes have problems, they can be quickly removed and replaced.

[0018] (2) High adaptability. For applications with large processing volumes, several membrane modules need to be assembled into a filtration unit, and then several filtration units need to be combined into a filtration system. This technical solution proposes two membrane module structures: one can be directly connected to the water collection pipe via a flexible hose, and the other can be connected via a flange and fixed to the water collection chamber of the housing.

[0019] (3) The filtration flux of the membrane is greatly improved. The flux of the membrane module is not only related to the filtration capacity of the membrane itself, but also to the diameter of the outlet. This technical solution designs the plug on the individual membrane as a water collection and outlet channel with a large volume, and a water collection chamber and outlet channel for multiple membrane modules assembled together, which avoids the bottleneck effect of the outlet and fully utilizes the filtration capacity of the membrane.

[0020] (4) The backwashing effect of the membrane is improved. The pressurized water for backwashing is distributed to the internal fluid channels of each membrane element through the water collection chamber of the membrane module or the water collection chamber of the plug on the upper part of the membrane. The flow rate is large and the resistance is low, and there is no longer any uneven distribution, so that the scale on the membrane surface can be removed quickly and effectively.

[0021] (5) It can avoid damage to the membrane sheets and membrane modules during operation and use, thus improving their service life. Due to its insert-type structure, the membrane sheets or membrane modules can be transported separately from the steel structural components of the filter unit at the factory and are specially packaged to ensure they are not damaged during transportation. During use, because the individual membrane sheets and upper connecting parts are insert-type, they are not damaged by external forces under conditions such as backwashing and housing vibration.

[0022] (6) Factory quality is fully guaranteed. Individual membrane sheets can be inspected through the insertion port before being assembled into groups. Assembled membrane modules can also be inspected through the insertion outlet or flange interface before being assembled into filter units. Attached Figure Description

[0023] Figure 1 This is a front view of a flat membrane assembly with a plug-in cluster modular structure according to the first embodiment of this utility model.

[0024] Figure 2 yes Figure 1 A top view of the flat membrane module with a modular, plug-in cluster assembly structure.

[0025] Figure 3 yes Figure 1 Left view of the flat membrane assembly with a modular, plug-in cluster structure shown.

[0026] Figure 4 yes Figure 1 The main cross-sectional view of the flat diaphragm in the plug-in cluster modular structure shown.

[0027] Figure 5 yes Figure 4 The top sectional view of the flat diaphragm shown.

[0028] Figure 6 yes Figure 1 The front view of the upper connector in the plug-in cluster modular structure shown.

[0029] Figure 7 yes Figure 6 The left sectional view of the upper connector shown.

[0030] Figure 8 yes Figure 1 The front view of the lower connector in the plug-in cluster modular structure shown.

[0031] Figure 9 yes Figure 8 The top sectional view of the lower connector shown.

[0032] Figure 10 yes Figure 1 The diagram shows the external structure of the slotted plate in the plug-in cluster modular structure.

[0033] Figure 11 yes Figure 10 Side view of the grooved plate shown.

[0034] Figure 12 This is a front view of the second embodiment of the flat membrane assembly with a plug-in cluster modular structure of this utility model.

[0035] Figure 13yes Figure 12 A top view of a second embodiment of a planar membrane assembly with a plug-in cluster modular structure. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0037] Example 1:

[0038] Figures 1-9 These are various views of a first embodiment of a modular, plug-in clustered flat sheet membrane assembly. The flat sheet membrane assembly includes a water collection box 1, an upper connector 2, an O-ring seal 3, a hollow flat sheet membrane assembly 4, a grooved plate 5, rubber spacers 6, a lower connector 7, fasteners 8, and screws 9.

[0039] Several hollow flat diaphragm assemblies 4 of the same specifications are arranged side by side at intervals along their thickness direction. Each hollow flat diaphragm assembly 4 includes an upper plug 41, a flat diaphragm 42, and a lower plug 43. The upper plug 41 and lower plug 43 are respectively installed at both ends of the flat diaphragm 42. The upper end (upper plug 41) of the hollow flat diaphragm assembly 4 is inserted into the hole of the upper connector 2 and is detachably connected in parallel via O-rings 3. The lower end (lower plug 43) is embedded in the lower connector 7 via a rubber spacer 6 and is detachably connected in parallel.

[0040] The upper plug 41 is a thin-walled, flat, hollow structure. One end has a flat, straight groove 411 for easy diaphragm insertion, and the other end has a cylindrical insertion port 412 with a central hole. The cylindrical surface of the insertion port 412 has an annular groove 413 for easy insertion of an O-ring seal 3. After the flat diaphragm 42 is inserted into the flat, straight groove, a water collection groove 414 is formed between the cylindrical insertion port 412 and the flat, straight groove 411. The central hole of the insertion port 412 communicates with the inner hole of the flat diaphragm 42 through the water collection groove 414. The lower plug 43 is a thin-walled, flat, hollow structure with a flat, straight groove at only one end for easy diaphragm insertion to seal the inner hole.

[0041] The upper connector 2 is a flange structure, shaped as a rectangular block 21 with a stepped edge. The stepped surface 22 of the edge serves as the flange mounting surface. Several cylindrical holes 23 are arranged in two parallel rows on the rectangular block 21. Two adjacent holes 23 on the upper connector rectangular block are offset from the center line of the diaphragm width direction by the same distance L and are located on the left and right sides of the center line, respectively. The hole diameter is adapted to the upper plug 41 of the flat sheet membrane assembly for insertion of the upper plug 41, and a plug-in sealing structure is formed by an O-ring 3.

[0042] The lower connector 7 is a rectangular block with a hollow structure, and a circular boss 71 for positioning is provided at its lower part.

[0043] Between the upper connector 2 and the lower connector 7, a grooved plate 5 is symmetrically embedded on the side and a detachable connection is formed by screws 9, so that several hollow flat diaphragm assemblies are bundled into a combined structure.

[0044] The water collection box 1 is detachably connected to the upper connector 2 by fasteners 8, and the inner cavity of the water collection box 1 is connected to the water outlet of each flat membrane sheet 42. In use, the modular structure flat membrane assembly formed by the cluster is connected to the water collection pipe of the filter unit or filter system through the plug-in water outlet 11 on the water collection box.

[0045] In this embodiment, the water collection box 1 is a semi-enclosed cavity with a flange structure. The flange is located at the lower end of the water collection box and is detachably connected to the upper connector 7 by fasteners 8. The upper end of the water collection box 1 is provided with a plug-in water outlet 11. In use, the plug-in water outlets of several flat membrane modules are connected to the water collection branch pipe or main pipe through flexible joints.

[0046] Example 2:

[0047] Figures 10-11 These are various views of a second embodiment of a modular, bundled, insert-type flat sheet membrane assembly. The flat sheet membrane assembly includes an upper connector 2', an O-ring 3', hollow flat sheet membrane assemblies 4', a grooved plate 5', a rubber spacer 6', a lower connector 7', and screws 9'. Several identical hollow flat sheet membrane assemblies 4' are arranged side-by-side at intervals along their thickness direction. Their upper ends are inserted into holes in the upper connector 2' and are detachably connected in parallel via O-rings 3'. Their lower ends are detachably connected in parallel via rubber spacers 6' embedded in the lower connector 7'. The grooved plate 5' is symmetrically embedded on the side between the upper connector 2' and the lower connector 7', and is detachably connected by screws 9', thus bundling several hollow flat sheet membrane assemblies into a combined structure.

[0048] Unlike Embodiment 1, the flat sheet membrane module in this embodiment does not have a water collection box. In use, several flat sheet membrane modules share a larger water collection chamber, which is fixed to the perforated plate of the water collection chamber via the flange structure of the upper connector. The outlet of each membrane sheet is connected to the water collection chamber. The upper end of the flat sheet membrane module passes through the perforated plate of the water collection chamber and is immersed in the raw water.

Claims

1. A flat membrane module with a plug-in cluster modular structure, characterized in that: The assembly includes a hollow flat sheet membrane assembly, an upper connector, a lower connector, rubber spacers, a grooved plate, and an "O" ring. Several hollow flat sheet membrane assemblies of the same specifications are arranged side by side at intervals along their thickness direction. The upper ends are inserted into the holes of the upper connector and are detachably connected in parallel by "O" rings. The lower ends are detachably connected in parallel by embedding the rubber spacers into the lower connector. The upper connector and the lower connector are symmetrically embedded in the grooved plate on the side and form a detachable connection, so that several hollow flat sheet membrane assemblies are bundled into an integral combination structure.

2. The flat sheet membrane module with a plug-in cluster modular structure according to claim 1, characterized in that: The hollow flat diaphragm assembly includes an upper plug, a flat diaphragm, and a lower plug, with the upper plug and lower plug respectively installed at both ends of the flat diaphragm.

3. The flat membrane module with a plug-in cluster modular structure according to claim 2, characterized in that: The upper plug is a thin-walled, flat, hollow structure. One end is a flat, straight groove to facilitate diaphragm insertion, and the other end is a cylindrical insertion port with a central hole. The cylindrical surface of the insertion port has an annular groove to facilitate the insertion of an "O"-ring seal. After the flat diaphragm is inserted into the flat, straight groove, a water collection groove is formed between the cylindrical insertion port and the flat, straight groove. The central hole of the insertion port communicates with the inner hole of the flat diaphragm through the water collection groove.

4. The flat membrane module with a plug-in cluster modular structure according to claim 3, characterized in that: The lower plug is a thin-walled, flat, hollow structure with a flat straight groove at only one end, which facilitates the insertion of a diaphragm to seal the inner hole.

5. The flat sheet membrane module with a plug-in cluster modular structure according to claim 1, characterized in that: The upper connector is a flange structure, which is a rectangular block with a stepped edge. The stepped surface of the edge is the flange mounting surface, and several cylindrical holes are opened in two parallel rows on the rectangular block.

6. The flat membrane module with a plug-in cluster modular structure according to claim 1, characterized in that: The two adjacent holes on the rectangular block of the upper connector are offset from the center line of the membrane width direction by the same distance and are located on the left and right sides of the center line respectively. The hole diameter is adapted to the upper plug of the flat membrane assembly for the upper plug to be inserted, and an insert-type sealing structure is formed by an "O" ring.

7. The flat membrane module with a plug-in cluster modular structure according to claim 1, characterized in that: The lower connector is a rectangular block with a hollow structure, and a circular boss is provided at its lower part for positioning.

8. The flat sheet membrane assembly with a plug-in cluster modular structure according to any one of claims 1 to 7, characterized in that: It also includes a water collection box, which is detachably installed on the upper end of the upper connector, and the inner cavity of the water collection box is connected to the water outlet of each flat diaphragm.

9. The flat sheet membrane module with a plug-in cluster modular structure according to claim 8, characterized in that: The water collection box is a semi-enclosed cavity with a flange structure. The flange is connected to the upper connector, and the upper end of the water collection box is provided with a plug-in water outlet.

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