CN116371199A

CN116371199A - Immersed membrane filtering device and cleaning method and using method thereof

Info

Publication number: CN116371199A
Application number: CN202310428791.7A
Authority: CN
Inventors: 陈泉学
Original assignee: Hubei Zhongquan Environmental Protection Technology Co ltd
Current assignee: Hubei Zhongquan Environmental Protection Technology Co ltd
Priority date: 2023-04-20
Filing date: 2023-04-20
Publication date: 2023-07-04

Abstract

The invention provides an immersed membrane filtering device, a cleaning method and a using method thereof, wherein the immersed membrane filtering device comprises a water pipe, a membrane and a partition plate; the water pipes are arranged at intervals; the plurality of diaphragms are connected in parallel between the two water pipes along the axial direction of the water pipes; the partition plate is axially arranged in the water pipe along the water pipe and divides the interior of the water pipe into a first channel and a second channel, a plurality of first interfaces and second interfaces are alternately arranged on the outer wall of the water pipe along the axial direction of the water pipe, each first interface is communicated with the first channel, and each second interface is communicated with the second channel; two ends of each membrane are respectively connected to a first interface of two water pipes or a second interface of two water pipes; two channels are arranged in parallel in the water pipe, and the membranes are alternately communicated with the two different channels through different interfaces, so that adjacent membranes on the same water pipe are alternately backwashed, membrane wires in the adjacent membranes are alternately contracted and expanded, and the membrane wires clustered together can be separated and pollutants are discharged.

Description

Immersed membrane filtering device and cleaning method and using method thereof

Technical Field

The invention relates to the technical field of ultrafiltration membranes, in particular to an immersed membrane filtration device, a cleaning method and a use method thereof.

Background

The immersed curtain type filtering membrane can be adopted to purify the water body in the environmental protection water treatment industry. The curtain type filtering membrane is characterized in that a plurality of filtering membrane sheets are connected in parallel between two water pipes, so that the plurality of filtering membrane sheets form a curtain type structure. Immersing the immersed filter membrane in the polluted water, filtering the polluted water by a membrane, and discharging the purified water through a water pipe for reuse.

When the immersed curtain type membrane system operates, the requirement on the water quality of inflow is very strict, if the water quality of inflow is changed and fluctuates greatly, or the water quality of a water source to be treated exceeds the standard for a long time, the water source to be treated cannot reach the standard, the core filtering component is usually caused to be rapidly blocked, the operation efficiency of the water treatment system is low, even the membrane filtering system is paralyzed, and more time and energy are required to treat the blocking problem of the membrane.

In order to solve the above problems, chinese patent CN113101811B discloses a method for cleaning the recovery of hollow fiber membrane, which adopts aeration, back flushing and other methods to clean the membrane. Chinese patent CN202124508U discloses a combined immersed pit water treatment device, in which a vibrating rod device is used to drive a membrane device to vibrate, so as to assist in aeration cleaning of a membrane.

However, the above-mentioned manner is difficult to effectively remove the pollution of the membrane, because the membrane is formed by bundling a plurality of filtering membrane wires, the membrane wires are densely bundled, and in order to ensure the filtering effect, the adjacent membrane wires are densely arranged, so that the membrane wires are extremely easy to form a cluster with pollutants, and the pollutants between the membrane wires are difficult to remove by means of aeration cleaning; meanwhile, the mode of vibrating the membrane wires by the aid of vibration of the vibrating rod can enable the whole equipment to vibrate, so that the equipment is damaged, and the method for cleaning the membrane is not ideal.

Disclosure of Invention

In view of the above, the present invention provides an immersion type membrane filtration device, a cleaning method and a use method thereof, which are used for solving the problem that the existing cleaning method is difficult to effectively clean the membrane.

The technical scheme of the invention is realized as follows: the invention provides an immersed membrane filtration device, which comprises at least two water pipes, wherein the water pipes are arranged at intervals; the diaphragms are connected in parallel between the two water pipes along the axial direction of the water pipes; a partition plate; the baffle plate is axially arranged in the water pipe along the water pipe and divides the interior of the water pipe into a first channel and a second channel, a plurality of first interfaces and second interfaces are alternately arranged on the outer wall of the water pipe along the axial direction of the water pipe, each first interface is communicated with the first channel, and each second interface is communicated with the second channel; the two ends of each membrane are respectively connected to the first interfaces of the two water pipes or the second interfaces of the two water pipes.

On the basis of the technical proposal, the utility model preferably further comprises a frame; a first pump body; a second pump body; wherein, a plurality of pairs of water through pipes are uniformly distributed on the frame along a straight line direction; the first pump body and the second pump body are both communicated with a plurality of water pipes at the same time.

Still more preferably, the extending direction of the membrane is perpendicular to the arrangement direction of the plurality of pairs of water pipes.

Still more preferably, a first cavity channel and a second cavity channel are formed in the frame, the first cavity channel is communicated with the first pump, the second cavity channel is communicated with the second pump, a plurality of first connecting pipes and second connecting pipes are arranged on the frame, the first connecting pipes are communicated with the first cavity channel, and the second connecting pipes are communicated with the second cavity channel; and a first connector and a second connector are arranged at any one end of the water pipe, each first connector is communicated with the first connecting pipe in one-to-one correspondence, and each second connector is communicated with the second connecting pipe in one-to-one correspondence.

Still further preferably, the first channel of one of the two adjacent pairs of water pipes and the second channel of the other pair of water pipes are simultaneously communicated to the first pump body, and the second channel of one of the two adjacent pairs of water pipes and the first channel of the other pair of water pipes are simultaneously communicated to the second pump body.

Still more preferably, the pump further comprises a first branch and a second branch which are communicated between the first pump body and the plurality of water pipes; the third branch and the fourth branch are communicated between the second pump body and the plurality of water pipes; one end of the first branch and one end of the second branch are respectively connected to two ends of each water pipe and are communicated with the first channel or the second channel, the other end of the first branch and the other end of the second branch are simultaneously communicated to the first pump body, and valves are respectively arranged on the first branch and the second branch; one end of the third branch and one end of the fourth branch are respectively connected to two ends of each water pipe and are communicated with the rest first channel or the second channel, the other end of the third branch and the other end of the fourth branch are simultaneously communicated to the second pump body, and valves are respectively arranged on the third branch and the fourth branch.

Still more preferably, the apparatus further comprises a reservoir for storing purified water; wherein, set up first pump body and second pump body in the cistern.

In a second aspect, the present invention also provides a cleaning method of an immersed membrane filtration device, using the membrane filtration device to pump water outwards from a first channel, and simultaneously delivering water into a second channel and back flushing a membrane; or pumping water outwards from the second channel, simultaneously conveying water into the first channel and backwashing the membrane.

In a third aspect, the present invention also provides a cleaning method of an immersed membrane filtration device, adopting the membrane filtration device, including the steps of firstly pumping water outwards from a first channel through a first pump body, and simultaneously delivering water into a second channel through a second pump body and back flushing a membrane; pumping water outwards from the second channel through the second pump body, and simultaneously conveying water into the first channel through the first pump body and back flushing the membrane; and step three, alternately repeating the step one and the step two.

In a fourth aspect, the invention also provides a use method of the immersed membrane filtration device, which adopts the membrane filtration device and comprises the following steps that firstly, a frame is arranged in a sewage pool, valves of a first branch and a third branch are simultaneously opened, and a first pump body and a second pump body are started to purify water in the sewage pool and then convey the purified water to a reservoir; closing a valve of a third branch and opening a valve of a fourth branch, reversing a second pump body to convey water from a reservoir to a second channel and back flushing a diaphragm; step three, closing valves of the first branch and the fourth branch, opening valves of the second branch and the third branch, pumping water to the reservoir from the second channel outwards through the second pump body, reversing the first pump body to convey water from the reservoir to the first channel, and backwashing the membrane; and step four, alternately repeating the step two and the step three until the membrane is cleaned, and repeating the step one.

Compared with the prior art, the immersed membrane filtering device and the cleaning method and the using method thereof have the following beneficial effects:

according to the invention, two channels are arranged in parallel in the water passing pipe, and the membranes are alternately communicated with the two different channels through different interfaces, so that adjacent membranes on the same water passing pipe are alternately backwashed, and membrane wires in the adjacent membranes are alternately contracted and expanded, so that the membrane wires clustered together can be separated and discharged out of pollutants, and the membranes are effectively cleaned.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a perspective view of a membrane filtration device of the present invention;

FIG. 2 is a schematic diagram of a membrane and a water pipe according to the present invention;

FIG. 3 is a schematic cross-sectional view of a water pipe according to the present invention;

FIG. 4 is a schematic view in partial cutaway of a membrane filtration device of the present invention;

fig. 5 is a schematic view showing the structure of the membrane filtration device according to the present invention in a connected state.

In the figure: 1. a water pipe; 11. a first joint; 12. a second joint; 101. a first channel; 102. a second channel; 103. a first interface; 104. a second interface; 2. a membrane; 3. a partition plate; 4. a frame; 41. a first connection pipe; 42. a second connection pipe; 401. a first channel; 402. a second channel; 5. a first pump body; 6. a second pump body; 7. a reservoir; 100. a first branch; 200. a second branch; 300. a third branch; 400. and a fourth branch.

Detailed Description

The following description of the embodiments of the present invention will clearly and fully describe the technical aspects of the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, are intended to fall within the scope of the present invention.

Embodiment one:

as shown in fig. 1, referring to fig. 2 and 3, an immersion type membrane filter device of the present invention includes a water pipe 1, a membrane 2, a partition plate 3 and a frame 4.

The frame 4 is usually formed by splicing a plurality of metal pipes, and the purpose of the frame is to install the water pipe 1 and the membrane 2 on the frame 4 and then put the frame 4 into a pool for use; the component consisting of two water pipes 1 and a plurality of membranes 2 which are connected in parallel is a membrane filtration unit which plays a role in filtration. The filtering principle of the membrane filtering device is that water in a water tank enters the water pipe 1 after being filtered by the membrane 2 and is conveyed to another clean water tank by the water pipe 1, so that the water in the sewage water tank is filtered and purified. In the practical implementation process, because the number of the membrane filtration units is large, it is not practical to independently communicate each water pipe 1 with another pool, so that the frame 4 can be composed of a plurality of hollow pipes, thereby forming a conveying channel in the frame 4, and then the water filtered by the plurality of membranes 2 can be uniformly conveyed to a clean pool by arranging water inlet and water outlet on the frame 4.

At least two water pipes 1 are arranged on the frame 4 at intervals, and the two water pipes 1 are respectively arranged at the upper part and the lower part of the frame 4.

The diaphragms 2 are connected in parallel between the two water pipes 1 along the axial direction of the water pipes 1, so that the diaphragms 2 are vertically arranged, namely, the extending direction of the diaphragms 2 is perpendicular to the arrangement direction of the plurality of pairs of water pipes 1, and the contact sectional area of the diaphragms 2 and the water flow direction surface is larger, so that the filtering effect is ensured.

The partition plate 3 is axially arranged in the water pipe 1 along the water pipe 1 and divides the interior of the water pipe 1 into a first channel 101 and a second channel 102, a plurality of first interfaces 103 and second interfaces 104 are alternately arranged on the outer wall of the water pipe 1 along the axial direction of the water pipe 1, each first interface 103 is communicated with the first channel 101, and each second interface 104 is communicated with the second channel 102; meanwhile, two ends of each membrane 2 are respectively communicated with the first interfaces 103 of the two water pipes 1 or the second interfaces 104 of the two water pipes 1, so that two adjacent membranes 2 in each membrane filtration unit are respectively communicated with different channels in the water pipes 1.

Meanwhile, two parallel water pipe 1 systems exist in the same membrane filtration unit, so that the sewage can be purified and the membrane 2 can be cleaned simultaneously.

Embodiment two:

on the basis of the first embodiment, in order to simultaneously realize the purification of sewage and the cleaning of the membrane 2, the device further comprises a first pump body 5, a second pump body 6 and a reservoir 7.

Wherein, the first pump body 5 and the second pump body 6 are both communicated with a plurality of water pipes 1 at the same time; the first pump body 5 and the second pump body 6 can simultaneously pump water outwards for sewage purification, and can also alternately reverse so as to backwash the membrane 2.

The first pump body 5 and the second pump body 6 are arranged in the reservoir 7. The reservoir 7 is used for storing purified water drawn out of the first pump body 5 and the second pump body 6, and the reservoir 7 can be used as a water supply source for back flushing.

Embodiment III:

on the basis of the second embodiment, the first channel 101 of one pair of water passing pipes 1 and the second channel 102 of the other pair of water passing pipes 1 in two adjacent pairs of water passing pipes 1 are simultaneously communicated to the first pump body 5, and the second channel 102 of one pair of water passing pipes 1 in two adjacent pairs of water passing pipes 1 and the first channel 101 of the other pair of water passing pipes 1 are simultaneously communicated to the second pump body 6, so that the back flushing sequences of the membranes 2 in adjacent membrane filtration units are staggered in sequence, and the back flushing sequences of any two adjacent membranes 2 in each membrane 2 arranged in a transverse-vertical matrix can be alternately performed.

Embodiment four:

on the basis of the second embodiment, in order to perform uniform water delivery or drainage through the frame 4, as shown in fig. 1, in combination with fig. 4, a first channel 401 and a second channel 402 are formed in the frame 4, the first channel 401 is communicated with the first pump body 5, the second channel 402 is communicated with the second pump body 6, a plurality of first connecting pipes 41 and second connecting pipes 42 are arranged on the frame 4, the first connecting pipes 41 are communicated with the first channel 401, and the second connecting pipes 42 are communicated with the second channel 402.

The water pipe 1 is provided with a first joint 11 and a second joint 12 at any end, each first joint 11 is communicated with a first connecting pipe 41 in one-to-one correspondence, and each second joint 12 is communicated with a second connecting pipe 42 in one-to-one correspondence.

Fifth embodiment:

on the basis of the third embodiment, when the water path arrangement of each membrane 2 is specifically performed, as shown in fig. 1, in conjunction with fig. 5, the water path arrangement further includes a first branch 100, a second branch 200, a third branch 300, and a fourth branch 400.

The first branch 100 and the second branch 200 are communicated between the first pump body 5 and the water pipes 1. One end of the first branch 100 and one end of the second branch 200 are respectively connected to two ends of each water pipe 1 and are communicated with the first channel 101 or the second channel 102, the other end of the first branch 100 and the other end of the second branch 200 are simultaneously communicated to the first pump body 5, and valves are respectively arranged on the first branch 100 and the second branch 200.

The third branch 300 and the fourth branch 400 are communicated between the second pump body 6 and the plurality of water through pipes 1. One end of the third branch 300 and one end of the fourth branch 400 are respectively connected to two ends of each water pipe 1 and are communicated with the rest of the first channel 101 or the second channel 102, the other end of the third branch 300 and the other end of the fourth branch 400 are simultaneously communicated to the second pump body 6, and valves are respectively arranged on the third branch 300 and the fourth branch 400.

Example six:

the cleaning method of the immersed membrane filter device adopts the membrane filter device of the first embodiment, pumps water outwards from the first channel 101, simultaneously conveys water into the second channel 102 and backflushes the membrane 2; alternatively, water is pumped out of the second channel 102 while water is being pumped into the first channel 101 and back flushing the membrane 2 is performed.

Embodiment seven:

the cleaning method of the immersed membrane filter device provided by the invention adopts the membrane filter device in the second embodiment, and comprises the following steps:

step one, pumping water outwards from the first channel 101 through the first pump body 5, and simultaneously conveying water into the second channel 102 through the second pump body 6 and back flushing the membrane 2.

And secondly, pumping water outwards from the second channel 102 through the second pump body 6, and simultaneously conveying water into the first channel 101 through the first pump body 5 and back flushing the membrane 2.

And step three, alternately repeating the step one and the step two.

Example eight:

the application method of the immersed membrane filter device provided by the invention adopts the membrane filter device in the fifth embodiment, and comprises the following steps.

Step one, the frame 4 is arranged in the sewage pool, valves of the first branch 100 and the third branch 300 are opened simultaneously, and the first pump body 5 and the second pump body 6 are started to purify water in the sewage pool and then convey the purified water to the reservoir 7, so that sewage purification is performed.

And step two, closing the valve of the third branch 300 and opening the valve of the fourth branch 400, reversing the second pump body 6 to convey water from the reservoir 7 into the second channel 102 and back flushing the membrane 2.

And thirdly, closing valves of the first branch 100 and the fourth branch 400, opening valves of the second branch 200 and the third branch 300, pumping water outwards from the second channel 102 to the reservoir 7 through the second pump body 6, reversing the first pump body 5 to deliver water from the reservoir 7 to the first channel 101 and back flushing the membrane 2.

And step four, alternately repeating the step two and the step three until the membrane 2 is cleaned, and repeating the step one.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims

1. An immersed membrane filtration device, comprising:

at least two water pipes (1) are arranged at intervals;

a plurality of diaphragms (2) are connected in parallel between the two water pipes (1) along the axial direction of the water pipes (1);

a partition plate (3);

the partition plate (3) is axially arranged in the water pipe (1) along the water pipe (1) and divides the interior of the water pipe (1) into a first channel (101) and a second channel (102), a plurality of first interfaces (103) and second interfaces (104) are alternately arranged on the outer wall of the water pipe (1) along the axial direction of the water pipe (1), each first interface (103) is communicated with the first channel (101), and each second interface (104) is communicated with the second channel (102);

the two ends of each membrane (2) are respectively connected to the first interfaces (103) of the two water pipes (1) or the second interfaces (104) of the two water pipes (1).

2. An immersion membrane filtration apparatus according to claim 1 further comprising:

a frame (4);

a first pump body (5);

a second pump body (6);

wherein, a plurality of pairs of water pipes (1) are uniformly distributed on the frame (4) along a straight line direction;

the first pump body (5) and the second pump body (6) are both communicated with the water pipes (1) at the same time.

3. An immersed membrane filtration device according to claim 2, wherein: the extending direction of the membrane (2) is perpendicular to the arrangement direction of the plurality of pairs of water pipes (1).

4. An immersed membrane filtration device according to claim 2, wherein: a first cavity channel (401) and a second cavity channel (402) are formed in the frame (4), the first cavity channel (401) is communicated with the first pump body (5), the second cavity channel (402) is communicated with the second pump body (6), a plurality of first connecting pipes (41) and second connecting pipes (42) are arranged on the frame (4), the first connecting pipes (41) are communicated with the first cavity channel (401), and the second connecting pipes (42) are communicated with the second cavity channel (402);

the water pipe (1) is provided with a first connector (11) and a second connector (12) at any end, each first connector (11) is communicated with a first connecting pipe (41) in one-to-one correspondence, and each second connector (12) is communicated with a second connecting pipe (42) in one-to-one correspondence.

5. An immersed membrane filtration device according to claim 2, wherein: the first channel (101) of one pair of water pipes (1) in two adjacent pairs of water pipes (1) and the second channel (102) of the other pair of water pipes (1) are simultaneously communicated to the first pump body (5), and the second channel (102) of one pair of water pipes (1) in two adjacent pairs of water pipes (1) and the first channel (101) of the other pair of water pipes (1) are simultaneously communicated to the second pump body (6).

6. An immersion membrane filtration apparatus according to claim 5 further comprising:

the first branch (100) and the second branch (200) are communicated between the first pump body (5) and the plurality of water pipes (1);

the third branch (300) and the fourth branch (400) are communicated between the second pump body (6) and the plurality of water pipes (1);

one end of the first branch (100) and one end of the second branch (200) are respectively connected to two ends of each water pipe (1) and are communicated with the first channel (101) or the second channel (102), the other end of the first branch (100) and the other end of the second branch (200) are simultaneously communicated to the first pump body (5), and valves are respectively arranged on the first branch (100) and the second branch (200);

one end of the third branch (300) and one end of the fourth branch (400) are respectively connected to two ends of each water pipe (1) and are communicated with the rest first channel (101) or second channel (102), the other end of the third branch (300) and the other end of the fourth branch (400) are simultaneously communicated to the second pump body (6), and valves are respectively arranged on the third branch (300) and the fourth branch (400).

7. An immersion membrane filtration apparatus according to claim 6 further comprising:

a reservoir (7) for storing purified water;

wherein, a first pump body (5) and a second pump body (6) are arranged in the reservoir (7).

8. A method for cleaning an immersed membrane filtration device using the membrane filtration device of claim 1, characterized in that: pumping water outwards from the first channel (101), simultaneously conveying water into the second channel (102) and back flushing the membrane (2); or pumping water outwards from the second channel (102), simultaneously conveying water into the first channel (101) and back flushing the membrane (2).

9. A method for cleaning an immersed membrane filtration device using the membrane filtration device of claim 5, characterized in that: comprises the steps of,

pumping water outwards from a first channel (101) through the first pump body (5), simultaneously conveying water into a second channel (102) through the second pump body (6) and back flushing the membrane (2);

pumping water outwards from the second channel (102) through the second pump body (6), and simultaneously conveying water into the first channel (101) through the first pump body (5) and back flushing the membrane (2);

and step three, alternately repeating the step one and the step two.

10. A method of using an immersed membrane filtration device employing the membrane filtration device of claim 7, characterized in that: comprises the steps of,

step one, arranging the frame (4) in a sewage pool, simultaneously opening valves of the first branch (100) and the third branch (300), starting the first pump body (5) and the second pump body (6) to purify water in the sewage pool and then conveying the purified water to a reservoir (7);

closing the valve of the third branch (300) and opening the valve of the fourth branch (400), reversing the second pump body (6) to convey water from the reservoir (7) into the second channel (102) and back flushing the membrane (2);

step three, closing valves of the first branch (100) and the fourth branch (400) and opening valves of the second branch (200) and the third branch (300), pumping water outwards from the second channel (102) to the reservoir (7) through the second pump body (6), reversing the first pump body (5) to deliver water into the first channel (101) from the reservoir (7) and back flushing the membrane (2);

and step four, alternately repeating the step two and the step three until the membrane (2) is cleaned, and repeating the step one.