WO2013040729A1

WO2013040729A1 - Upright external pressure hybrid membrane filtration system

Info

Publication number: WO2013040729A1
Application number: PCT/CN2011/001654
Authority: WO
Inventors: 张慧春
Original assignee: Zhang Huichun
Priority date: 2011-09-22
Filing date: 2011-09-29
Publication date: 2013-03-28
Also published as: CN102389709A; CN102389709B

Abstract

An upright external pressure hybrid membrane filtration system, comprising at least one vertically arranged, sealed-end pressure vessel (1) and a vertically arranged membrane component assembly sealed within the pressure vessel (1). The membrane component assembly comprises at least two vertically arranged, parallel membrane components (2). The membrane component assembly and the pressure vessel (1) are provided therebetween with a gap (3). The membrane component assembly has arranged at an upper end-section thereof an end panel (6). The end panel (6) partitions the space within the pressure vessel (1) into a sealed upper end cavity (8) and a sealed lower end cavity (7). The membrane components (2) comprise internal membrane fibers (10), a venthole (5), and an external surface supporting-fixing apparatus coveringly arranged over the exterior of the membrane fibers (10). Water permeates outwards or inwards via the external surface supporting-fixing apparatus (11). The upper end cavity (8) of the pressure vessel (1) is provided with an upper end water inlet/outlet (13). The lower end cavity (7) of the pressure vessel (1) is provided with at least one lower end water inlet/outlet (14). Each pressure vessel (1) is arranged in parallel to another.

Description

Vertical external pressure composite membrane filtration system

Technical field

The present invention relates to a membrane filtration system, and more particularly to a vertical external pressure composite membrane filtration system. Background technique

The existing vertical pressure membrane filtration system is generally composed of a hollow fiber membrane component with a shell in a pressure vessel, an inlet pipe (main pipe and branch pipe), a water production pipe (main pipe and branch pipe), a thick water pipe (main pipe and branch pipe), and a membrane. The frame is composed of membrane elements connected in parallel on both sides of the pipeline, and the system is complicated. Moreover, due to the small amount of processing of a single membrane element, the system uses a large number of membrane elements, high cost and large hidden troubles. Moreover, the pressure membrane filtration system and the submerged membrane filtration system are not compatible, which is not conducive to system compatibility. Summary of the invention

The present invention has been made to solve the deficiencies in the prior art, and an object of the present invention is to provide a simple structure, low cost, a membrane element group, and a plurality of membrane elements in a pressure vessel for simultaneous filtration, thereby effectively improving The filtration efficiency of the filtration system can be used in a variety of modes of operation, and the vertical external pressure composite membrane filtration system with greatly improved applicability.

A vertical external pressure composite membrane filtration system of the present invention comprises at least one vertically disposed end-closed pressure vessel and a vertically disposed membrane element assembly enclosed in the pressure vessel, the membrane component assembly including a vertical a parallel at least two membrane elements disposed, a gap is left between the membrane element assembly and the pressure vessel, and an upper end portion of the membrane element assembly is provided with an end plate, the end plate separating the space inside the pressure vessel In the closed upper and lower end chambers, the membrane element comprises an inner membrane wire, a venting opening and an outer surface supporting fixture disposed outside the membrane filament, water oozing or infiltrating from the outer surface supporting fixture, The pressure vessel is located at an upper end chamber and is provided with an upper end inlet and outlet port, and the lower end chamber of the pressure vessel is provided with at least one lower end inlet and outlet port, and the pressure vessels are disposed in parallel with each other. A vertical external pressure composite membrane filtration system of the present invention may also be:

The upper end of the pressure vessel is detachably provided to seal the upper cover of the pressure vessel.

The membrane element further includes a closure at both ends of the membrane filament and a tip located outside the closure, the closure being disposed at the end of the membrane filament, the tip being the head, the membrane The wire and the outer surface support fixture are secured together.

A fixing hole conforming to the shape of the end is disposed on the end plate, and an upper end edge of the upper end of the membrane element is sealingly fixed in the fixing hole of the end plate.

The fixing hole of the end plate is fixed to the upper end of the upper end of the membrane element.

The head and the end, the outer surface supporting fixture and the fixing hole have the same shape. The head, the end or the outer surface support fixture are square or round in shape.

The outer surface support fixture includes an outer surface support mesh or an outer surface support.

The pressure vessel is made of a metal or concrete material.

The pressure vessel is built on the ground or the lower half of the pressure vessel is located below the ground.

The upper end inlet and outlet port and the lower end inlet and outlet port are respectively disposed at the lower end cavity of the same pressure vessel of the pressure vessel, and two lower end inlet and outlet ports are respectively disposed, and the two lower end inlet and outlet ports are respectively located on the same side of the pressure vessel .

A vertical external pressure composite membrane filtration system of the present invention, comprising: at least one vertically disposed end-closed pressure vessel and a vertically disposed membrane element assembly enclosed within the pressure vessel, the membrane element assembly comprising a parallel at least two membrane elements disposed vertically, a gap is left between the membrane element assembly and the pressure vessel, and an upper end portion of the membrane element assembly is provided with an end plate, the end plate is a space inside the pressure vessel Separating into closed upper and lower end chambers, the membrane element comprising an inner membrane wire, a venting opening and an outer surface supporting fixture disposed outside the membrane filament, water oozing from the outer surface supporting fixture or Infiltration, the pressure vessel is located at the upper end chamber and is provided with an upper end inlet and outlet port, and the lower end chamber of the pressure vessel is provided with at least one lower end inlet and outlet port, and the pressure vessels are disposed in parallel with each other. The vertical external pressure composite membrane filtration system of such a structure has an advantage over the prior art that the membrane of the membrane element The outer part of the wire is provided with a water-permeable outer surface supporting and fixing device. Water can be discharged from the lower end of the film element into the water outlet and the outer surface into the membrane wire for filtration and then discharged from the upper end of the membrane element, and the range of water entering the membrane element is enlarged, and the membrane is enlarged. The suitability of the filtration system. In addition, since a plurality of membrane elements can be disposed in the pressure vessel, the plurality of membrane elements simultaneously filter the water, thereby greatly improving the filtration efficiency of the membrane filtration system, and, since the lower end of the membrane element assembly is not fixed, the end plate divides the pressure vessel It is a two-part cavity with a simple structure and low cost. Moreover, it is possible to set a plurality of parallel pressure vessels to simultaneously filter and further improve the filtration efficiency. DRAWINGS

1 is a schematic view of a specific embodiment of a vertical external pressure composite membrane filtration system of the present invention.

2 is a radial cross-sectional view of a membrane element of a vertical external pressure composite membrane filtration system of the present invention.

Figure 3 is an axial cross-sectional view of a membrane element of a vertical external pressure composite membrane filtration system of the present invention.

4 is a schematic view showing another embodiment of a membrane element of a vertical external pressure composite membrane filtration system of the present invention.

Figure 5 is a plan view of the end plate of the vertical external pressure composite membrane filtration system of the present invention.

Figure 6 is a schematic view showing the connection of two pressure vessels of the vertical external pressure composite membrane filtration system of the present invention.

Figure 7 is a schematic view showing the connection of four pressure vessels of the vertical external pressure composite membrane filtration system of the present invention.

Figure number description

1...pressure vessel 2...membrane element 3...gap 4...upper cover 5...ventilation hole 6...end plate 7...lower end cavity 8...upper end cavity 10...film wire 11...outer surface support fixture

12...Fixed hole 13...Upper inlet and outlet 14...Bottom inlet and outlet

15...Head 16...End Specific implementation

A vertical external pressure composite membrane filtration system of the present invention will now be described in detail with reference to Figs. 1 through 7 of the accompanying drawings.

Specific embodiment 1 A vertical external pressure composite membrane filtration system of the present invention, with reference to FIGS. 1 to 7, includes at least one vertically disposed end-closed pressure vessel 1 and a vertically disposed closure enclosed in the pressure vessel 1 Membrane element assembly, the membrane element assembly comprises at least two membrane elements 2 arranged in parallel perpendicularly, a gap 3 is left between the membrane element assembly and the pressure vessel 1, and the upper end of the membrane element assembly is provided with an end a plate 6, the end plate 6 partitions the inner space of the pressure vessel 1 into a closed upper end chamber 8 and a lower end chamber 7, the membrane element 2 comprising an inner membrane wire 10, a venting opening 5 and a membrane 10 disposed thereon The outer surface of the outer surface supports the fixing device, and the water oozes or penetrates from the outer surface supporting fixture. The pressure vessel 1 is located outside the upper end chamber 8 and is provided with an upper end inlet and outlet port 13. The pressure vessel 1 is located at the lower end. At least one lower end inlet and outlet port 14 is disposed outside the chamber 7, and the pressure vessels 1 are disposed in parallel with each other. The specific vertical external pressure composite membrane filtration system operates as follows:

External pressure full-flow filtration: As shown in Fig. 1, in the filtration stage, sewage enters the lower end chamber 7 from the lower end inlet and outlet port 14 outside the lower end chamber of the pressure vessel 1, and is externally applied by the outer wall of the membrane element 2 under pressure. The surface supporting fixture penetrates into the membrane element 2 which is in contact with the lower end chamber 7, and the membrane pore of the membrane element 2 enters the inside of the membrane element 2 and is filtered, and then flows out from the upper end of the membrane element 2 under pressure, and is filtered. The filtered water is mainly concentrated in the upper end chamber 8 between the pressure vessel 1 and the membrane wire 10, and under the action of pressure, the upper end inlet and outlet ports 13 of the upper end produce purified water. In the cleaning stage, clean water enters the upper end chamber 8 of the pressure vessel 1 from the upper end inlet and outlet port 13 of the upper end, and then rinsing the surface of the membrane wire 10 from the end of the membrane element 2 into the membrane wire 10 of each membrane element 2, and after rinsing The sewage and dirt are discharged from the lower end inlet and outlet of the lower end, and the membrane element 2 and the pressure vessel 1 are rinsed off. The function of the vent 5 is to ventilate during air washing.

Therefore, the vertical external pressure composite membrane filtration system of such a structure has an advantage over the prior art that the membrane filament 10 of the membrane element 2 is externally provided with a water permeable outer surface supporting fixture, and water can be used not only from the membrane component 2 The lower end enters the membrane wire 10 and is filtered, and then discharged from the outside of the membrane element 2, and the water can be filtered from the outside of the membrane element 2 to the upper end of the membrane element 2, and then discharged, thereby expanding the area of the membrane original water, increasing the filtration efficiency, and expanding Applicability of membrane filtration systems. In addition, since a plurality of membrane elements 2 can be disposed in the pressure vessel 1, the plurality of membrane elements 2 simultaneously filter the water, thereby greatly improving the filtration efficiency of the membrane filtration system, and, since the lower end of the membrane element assembly is not fixed, the end plate will The pressure vessel is divided into two Independent chambers with simple structure and low cost. At the same time, since the structures of the membrane element 2 and the end plate 6 are relatively simple, the manufacturing is easier, and the manufacturing cost of the integral vertical external pressure composite membrane filtration system is greatly reduced. Moreover, it is possible to set a plurality of pressure vessels 1 in parallel to simultaneously filter, and further improve the filtration efficiency. The vertical external pressure composite membrane filtration system can be pressurized according to the pressure type, that is, the water is pressurized, and the high pressure water can be generated. It can also be operated by immersion, that is, the inlet water flows into the pressure vessel 1 and is pressurized by the water pump. Filter. When the influent is an activated sludge mixture, the system operates as MBR (ie Membrane Bioreactor) technology.

Specific embodiment 2

The present invention relates to a vertical external pressure composite membrane filtration system. Referring to FIG. 1 to FIG. 7 , on the basis of the first embodiment, the upper end of the pressure vessel 1 is detachably provided to seal the pressure vessel 1 . The upper cover 4. The advantage of providing the upper cover 4 is to close the pressure vessel 1, and the upper cover 4 can be opened during maintenance for maintenance and maintenance. Of course, you can also be sealed at the bottom. The pressure vessel 1 may be a concrete poured tank or other sealed container, as long as the membrane element 2 and the end plate 6 can be opened by opening the upper portion. In addition, the pressure vessel 1 may also be connected in plurality, such as two connections or four connections or more to form a large membrane filtration system, and the membrane element assembly of one layer contains at least two membrane elements 2, which may generally comprise Three, four to seven, and large ones can contain thirty. Additionally, the outer surface support fixture includes an outer surface support mesh or an outer surface support. It suffices that the water filtered by the membrane 10 is oozing out and the membrane filament 10 is fixed.

Concrete embodiment 3

The present invention relates to a vertical external pressure composite membrane filtration system. Referring to FIG. 1 to FIG. 7 , based on the specific embodiment 1 or the second embodiment, the membrane element 2 further includes two membrane filaments 10 . a head 15 at the end and a tip 16 at the outside of the head 15, the head 15 being disposed at the end of the membrane wire 10, the end 16 having the head 15, the membrane 10 and The outer surface support fixtures are secured together. Such a membrane element 2 can be applied to the external pressure infiltration, and since the area of the sewage entering the membrane element 2 is too large, the filtration efficiency is improved, and the applicability of the membrane filtration system is expanded. Of course, the membrane element 2 can also adopt other structures. As long as the outside of the membrane element 2 can seep water. A further preferred solution is to provide the end plate 6 with a fixing hole conforming to the shape of the end 16 12, the upper end of the upper end of the membrane element 2 is sealingly fixed to the fixing hole 12 of the end plate 6 at the edge. Thus, the membrane element 2 can be hermetically fixed in the lower end chamber 7, so that the water of the upper end chamber 8 and the lower end chamber 7 are not mixed together, affecting the filtering effect. A further preferred embodiment is that the fixing hole 12 of the end plate 6 is fixed to the upper end 16 of the upper end of the membrane element 2. In addition, the head 15 and the end portion 16, the outer surface supporting fixture and the fixing hole 12 are identical in shape, so as to ensure that the end plate 6 seals and fixes the upper edge of the film member 2. A further preferred solution is that the head 15, the end 16, the outer surface supporting fixture and the fixing hole 12 are all square or round. This manufacturing process is relatively simple and low in cost.

A vertical external pressure composite membrane filtration system of the present invention, please refer to FIG. 1 to FIG. 7 , and based on the specific embodiment 1 or the specific embodiment 2 or the specific embodiment 3 or the specific embodiment 4, The outer surface support fixture 11 includes an outer surface support mesh or an outer surface support. Wherein if the outer shape of the membrane element 2 is circular, the outer surface support fixture 11 is a support mesh wrapped around the outer membrane element 2, and if the outer contour of the membrane element 2 is square, the outer surface supports the fixture 11 is a support frame that is fixedly supported on four edges. Of course, the outer surface supporting fixture 11 may be of other forms as long as the membrane element 2 can be supported and fixed. Further, the pressure vessel 1 is made of a metal or concrete material. The pressure vessel 1 is made of a metal material with the advantage of easy installation and good sealing. The pressure vessel 1 is made of a metal material, and the advantage is low cost, which is less affected by rain and air corrosion. Further, the pressure vessel 1 is built on the ground or the lower half of the pressure vessel is located below the ground. In this way, the pressure vessel 1 is buried in the ground to reduce the lift of the system and save energy.

Concrete embodiment 4

The vertical external pressure composite membrane filtration system of the present invention, with reference to FIG. 1 to FIG. 11 , on the basis of the specific embodiment 1 or the specific embodiment 2 or the third embodiment, the upper end inlet and outlet 13 may also be The lower end inlet and outlet ports 14 are located on the same side of the pressure vessel 1, respectively. This has the advantages of convenient piping, simple piping, and reduced cost. A further preferred embodiment provides two lower inlet and outlet ports 14 outside the lower end chamber 7 of the pressure vessel 1, the two lower inlet and outlet ports 14 being located on the same side of the pressure vessel 1, respectively. This has the advantages of convenient piping, simple piping, and reduced cost. The most preferred technical solution is that the pressure vessel 1 is entirely on the ground or the lower half of the pressure vessel is located below the ground.

The above description is only for the specific embodiments of the present invention, but it is not intended to be the scope of the present invention. Any equivalent changes or modifications made in accordance with the design spirit of the present invention should be considered as falling within the protection of the present invention. range.

Claims

Claim

What is claimed is: 1. A vertical external pressure composite membrane filtration system, comprising: at least one vertically disposed end-closed pressure vessel; and a vertically disposed membrane element assembly enclosed in the pressure vessel, the membrane component assembly a parallel at least two membrane elements including a vertically disposed gap, a gap between the membrane element assembly and the pressure vessel, an upper end portion of the membrane element assembly being provided with an end plate, the end plate being placed inside the pressure vessel The space is partitioned into a closed upper end cavity and a lower end cavity, the membrane element comprising an inner membrane wire, a venting hole and an outer surface supporting fixture disposed outside the membrane filament, water oozing out from the outer surface supporting fixture Or infiltration, the pressure vessel is located at the upper end chamber and is provided with an upper end inlet and outlet, and the lower end chamber of the pressure vessel is provided with at least one lower end inlet and outlet, and the pressure vessels are disposed in parallel with each other.

2. A vertical external pressure composite membrane filtration system according to claim 1, wherein: the upper end of the pressure vessel is detachably provided to seal the upper lid of the pressure vessel.

3. A vertical external pressure composite membrane filtration system according to claim 1, wherein: said membrane element further comprises a closure at both ends of the membrane filament and a tip located outside said closure, said A closure is disposed at the end of the membrane wire, the end securing the closure, the membrane filament, and the outer surface support fixture together.

4. The vertical external pressure composite membrane filtration system according to claim 3, wherein: the end plate is provided with a fixing hole conforming to the shape of the end, and an upper end edge of the upper end of the membrane element It is sealingly fixed in the fixing hole of the end plate.

A vertical external pressure composite membrane filtration system according to claim 4, wherein: the fixing hole of the end plate is fixed to the upper end of the upper end of the membrane element.

6. A vertical external pressure composite membrane filtration system according to claim 5, wherein: said head and said end, said outer surface supporting fixture and said fixing hole are in the same shape.

7. The vertical external pressure composite membrane filtration system according to claim 6, wherein: the head, the end or the outer surface supporting fixture has a square shape or a circular shape. .

8. A vertical external pressure composite membrane filtration system according to any one of claims 1 to 7, wherein: said outer surface support fixture comprises an outer surface support mesh or an outer surface support Rack.

A vertical external pressure composite membrane filtration system according to any one of claims 1 to 7, wherein the pressure vessel is made of a metal or concrete material.

10. A vertical external pressure composite membrane filtration system according to any one of claims 1 to 7, wherein the pressure vessel is built on the ground or the lower half of the pressure vessel is located below the ground.

11. A vertical external pressure composite membrane filtration system according to any one of claims 1 to 7, wherein: said upper inlet and outlet ports and said lower inlet and outlet ports are respectively located in said pressure vessel The same side.

12. The vertical external pressure composite membrane filtration system according to claim 11, wherein: the lower end chamber of the pressure vessel is provided with two lower end inlet and outlet ports, and the two lower end inlet and outlet ports are respectively located at the The same side of the pressure vessel.