CN112999878A - Column type membrane assembly and sewage treatment process - Google Patents

Abstract

The invention discloses a column type membrane assembly and a sewage treatment process, which comprise a single-hole ceramic membrane and a rotational flow generating mechanism, wherein the rotational flow generating mechanism comprises a rotational flow generating pipe, a plurality of radial fins arranged on the inner wall of the rotational flow generating pipe, and a synchronous driving assembly used for driving the rotational flow generating pipe to rotate when the single-hole ceramic membrane is cleaned, and the coaxial rotational flow generating pipe is rotatably connected and communicated with the single-hole ceramic membrane. The rotational flow generating tube driven to rotate drives the clean water flow to rotate through the plurality of radial fins inside the rotational flow generating tube, so that the rotational cleaning water flow can contact with the hole wall of the single-hole ceramic membrane for a time when passing through the holes of the single-hole ceramic membrane, and tangential force can be applied to the hole wall of the single-hole ceramic membrane by the rotational cleaning water flow, namely, the cleaning water flow simultaneously peels off impurities on the hole wall of the single-hole ceramic membrane in the length direction and the tangential direction of the single-hole ceramic membrane, and therefore the efficiency of cleaning the impurities attached to the hole wall of the single-hole ceramic membrane by the cleaning water flow is improved.

Description

Column type membrane assembly and sewage treatment process

Technical Field

The invention relates to the technical field of sewage treatment, in particular to a column type membrane assembly and a sewage treatment process.

Background

Ceramic membranes, also known as inorganic ceramic membranes, are asymmetric membranes formed by special processes of inorganic ceramic materials, and are divided into tubular ceramic membranes and flat ceramic membranes. The pipe wall of the tubular ceramic membrane is densely distributed with micropores, under the action of pressure, raw material liquid flows in the membrane pipe or outside the membrane, small molecular substances (or liquid) permeate the membrane, and large molecular substances (or solid) are intercepted by the membrane, so that the purposes of separation, concentration, purification, environmental protection and the like are achieved.

Because of the structural particularity of the tubular ceramic membrane, impurities attached to the tube wall of the tubular ceramic membrane are difficult to directly clean, and usually, cleaning water flow with lower water pressure compared with the water flow during filtering continuously passes through the tubular ceramic membrane, so that the impurities attached to the tube wall are stripped from the tube wall under the continuous flushing of the cleaning water flow, and the purpose of cleaning the tubular ceramic membrane is achieved.

However, since the cleaning method is single, the tube wall of the tubular ceramic membrane is cleaned only by the axial flushing method of the cleaning water flow, and the structure of the impurity filter cake at different positions on the tube wall may have differences, so that the cleaning efficiency and the cleaning quality of the tubular ceramic membrane are low, the cleaning frequency of the tubular ceramic membrane is increased, the service life of the tubular ceramic membrane is prolonged, the cleaning efficiency of the tubular ceramic membrane is reduced, and the influence on the filtering operation is caused.

Disclosure of Invention

The invention aims to provide a column type membrane module and a sewage treatment process, and aims to solve the technical problems of poor cleaning effect and increased cleaning cost caused by single cleaning mode of a tubular ceramic membrane in the prior art.

In order to solve the technical problems, the invention specifically provides the following technical scheme:

a column type membrane module and a sewage treatment process comprise a single-hole ceramic membrane and a rotational flow generating mechanism, wherein the rotational flow generating mechanism is connected and communicated with a water inlet end of the single-hole ceramic membrane, and enables cleaning water flow injected into the single-hole ceramic membrane to rotate when the single-hole ceramic membrane is cleaned so as to promote impurities on the inner wall of the single-hole ceramic membrane to be peeled off by the cleaning water flow;

the swirl generating mechanism comprises a swirl generating pipe, a plurality of radial fins and a synchronous driving assembly, wherein the radial fins are arranged on the inner wall of the swirl generating pipe, the synchronous driving assembly is used for driving the swirl generating pipe to rotate when the single-hole ceramic membrane is cleaned, the swirl generating pipe rotates and drives the cleaning water flow to rotate through the inside of the swirl generating pipe through the radial fins, and the swirl generating pipe is connected with the single-hole ceramic membrane in a rotating and sealing mode through a rotating sealing piece.

As a preferred embodiment of the present invention, the number of the single-hole ceramic membranes is plural, the radial cross section of the outer wall of the single-hole ceramic membrane is regular hexagon, the plural single-hole ceramic membranes are fixed by a porous support having plural mounting holes in a manner that the outer walls opposite to each other are attached to each other, a gas-liquid circulation ring groove is formed in the outer wall of the single-hole ceramic membrane along the circumferential direction, two gas-liquid circulation ring grooves of adjacent single-hole ceramic membranes are communicated with each other, the water inlet ends of the plural single-hole ceramic membranes are connected and communicated with and provided with the same water inlet end pipe heads, and the water inlet end pipe heads are provided with the plural swirl generating pipes corresponding to the plural single-hole ceramic membranes one to one.

As a preferable scheme of the present invention, the plurality of swirl generating tubes are installed in the water inlet end tube head through the same barrel-shaped supporting member, a plurality of rotary seal bearings penetrating through corresponding end portions are installed at both ends of the barrel-shaped supporting member, the swirl generating tubes are rotatably inserted into two opposite rotary seal bearings, and the synchronous driving assembly is installed in the barrel-shaped supporting member.

As a preferable scheme of the present invention, the synchronous driving assembly includes an outer gear ring sleeved on the swirl generating tubes, a plurality of swirl generating tubes are arranged on the barrel-shaped supporting member in a central array manner around the same swirl generating tube, a plurality of peripheral swirl generating tubes are engaged with the central swirl generating tube through the corresponding outer gear ring, and are arranged at intervals between the peripheral adjacent outer gear rings, and the outer sides of the plurality of peripheral outer gear rings are engaged with the same inner gear ring, a driving motor for driving the inner gear ring to rotate is installed in the barrel-shaped supporting member, and the driving motor is in transmission connection with the inner gear ring through a transmission assembly.

As a preferable scheme of the present invention, seven single-hole ceramic membranes are provided, six single-hole ceramic membranes are provided around the same single-hole ceramic membrane, seven swirl generating tubes are provided in one-to-one correspondence with the single-hole ceramic membranes, and the array mode of the seven swirl generating tubes is the same as that of the seven single-hole ceramic membranes.

As a preferred scheme of the invention, the porous support comprises a water purification conduit and mounting pore plates, the mounting pore plates are mounted in two ends of the water purification conduit through corresponding positioning components, the mounting pore plates at two ends are provided with a plurality of mounting holes for plugging the single-pore ceramic membranes in a penetrating manner, and the plurality of single-pore ceramic membranes and the inner wall of the water purification conduit are arranged at intervals so as to be beneficial to the seepage of purified water generated by the filtration of the plurality of single-pore ceramic membranes;

a plurality of water purification holes have been seted up to the tip of mounting hole board, just it is a plurality of to have seted up the intercommunication in the mounting hole board the water purification pipeline in water purification hole is by a plurality of the water purification that single-hole ceramic membrane oozes loops through the water purification hole with the water purification pipeline flows out.

As a preferred scheme of the invention, the positioning assembly comprises supporting legs and radial supporting rods, the side wall of the mounting pore plate is supported on the inner wall of the water purification conduit sequentially through a plurality of radial supporting rods and a plurality of corresponding supporting legs, the mounting pore plate is coaxially arranged in the water purification conduit through a plurality of same radial supporting rods and supporting legs, fixing screws are mounted on the supporting legs, and a plurality of threaded holes which are in one-to-one correspondence with the plurality of fixing screws are arranged on the inner wall of the water purification conduit;

the inner walls of the two ends of the water purification conduit are provided with circumferential limiting grooves which penetrate through the corresponding end parts of the water purification conduit, the supporting legs are slidably mounted in the circumferential limiting grooves, and the threaded holes are formed in the groove walls of the circumferential limiting grooves.

In a preferred embodiment of the present invention, the outer walls of both ends of the single-hole ceramic membrane each have a thin-walled portion corresponding to the mounting hole, the outer diameter of the thin-walled portion is smaller than the outer diameter of the single-hole ceramic membrane, and the outer diameter of the thin-walled portion is adapted to the inner diameter of the mounting hole.

In a preferred embodiment of the present invention, a rubber packing that is sealingly fitted to an outer wall of the thin portion is fitted into an inner wall of the mounting hole.

In order to solve the above technical problems, the present invention further provides the following technical solutions:

a process for treating wastewater comprising:

s100, detecting the filtering resistance of the single-hole ceramic membrane, and cleaning the single-hole ceramic membrane when the filtering resistance of the single-hole ceramic membrane reaches a preset value;

s200, when the single-hole ceramic membrane is cleaned, adjusting the water pressure and the flow of cleaning water flow passing through the single-hole ceramic membrane according to the aperture of the single-hole ceramic membrane so as to enable the cleaning water flow to pass through the single-hole ceramic membrane at the lowest water pressure and the maximum radial height;

s300, driving the cleaning water flow injected into the single-hole ceramic membrane to rotate through a rotational flow generating mechanism, so that the rotating cleaning water flow washes the hole wall of the single-hole ceramic membrane in the axial direction and the tangential direction to accelerate the stripping of the impurity filter cake on the hole wall of the single-hole ceramic membrane.

Compared with the prior art, the invention has the following beneficial effects:

according to the invention, the clean water flow is driven to rotate by the rotational flow generating mechanism, when the rotating cleaning water flow passes through the holes of the single-hole ceramic membrane, the contact time between the cleaning water flow and the hole wall of the single-hole ceramic membrane is increased, and the tangential force is exerted on the hole wall of the single-hole ceramic membrane by the rotating cleaning water flow, namely, the cleaning water flow simultaneously peels off impurities on the hole wall of the single-hole ceramic membrane in the length direction and the tangential direction of the single-hole ceramic membrane, so that the efficiency of cleaning the impurities attached to the hole wall of the single-hole ceramic membrane by the cleaning water flow is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

FIG. 1 is a schematic overall structure diagram of an embodiment of the present invention;

FIG. 2 is a schematic structural view of a porous scaffold according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a swirling flow generating mechanism according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a single-hole ceramic membrane according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view of a single-hole ceramic membrane according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a water purification conduit according to an embodiment of the present invention.

The reference numerals in the drawings denote the following, respectively:

3-a water purification conduit; 8-rubber sealing ring; 9-a rotational flow generating mechanism; 10-water inlet end pipe head; 11-a barrel support; 12-a rotating sealed bearing;

101-single-hole ceramic membrane; 102-a porous scaffold;

1011-gas-liquid circulation ring groove; 1014-a thin wall portion;

1021-installing an orifice plate; 1022-supporting foot; 1023-radial support rods; 1024 — set screw;

301-circumferential limiting groove;

901-swirl generating tube; 902-radial fins; 903 — a synchronous drive component; 904 — rotating seal;

9031-external gear ring; 9032-inner gear ring; 9033-driving motor.

Detailed Description

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

As shown in fig. 1 to 6, the present invention provides a column membrane module, comprising a single-hole ceramic membrane 101 and a swirling flow generating mechanism 9, wherein the swirling flow generating mechanism 9 is connected and communicated with a water inlet end of the single-hole ceramic membrane 101, the swirling flow generating mechanism 9 rotates a cleaning water flow injected into the single-hole ceramic membrane 101 when the single-hole ceramic membrane 101 is cleaned, so as to promote impurities on an inner wall of the single-hole ceramic membrane 101 to be peeled off by the cleaning water flow, the principle is that when the rotating cleaning water flow passes through the holes of the single-hole ceramic membrane 101, the contact time of the cleaning water flow and the hole wall of the single-hole ceramic membrane 101 is increased, the rotating cleaning water flow exerts tangential force on the hole wall of the single-hole ceramic membrane 101, namely, the cleaning water flow simultaneously peels off the impurities on the pore wall of the single-pore ceramic membrane 101 in the longitudinal direction and the tangential direction of the single-pore ceramic membrane 101, thereby improving the efficiency of cleaning the impurities attached to the hole wall of the single-hole ceramic membrane 101 by the cleaning water flow.

In the present invention, the single-hole ceramic film 101 is preferably a ceramic film having a tubular shape and having only a single hole.

Preferably, the swirl flow generating mechanism 9 includes a swirl flow generating tube 901, a plurality of radial fins 902 attached to an inner wall of the swirl flow generating tube 901, and a synchronous driving unit 903 for driving the swirl flow generating tube 901 to rotate when the single-hole ceramic membrane 101 is cleaned, the rotating swirl flow generating tube 901 rotates by driving a cleaning water flow passing through the inside thereof through the plurality of radial fins 902, and the swirl flow generating tube 901 is rotatably and sealingly connected to the corresponding single-hole ceramic membrane 101 by a rotary seal 904.

During the cleaning process of the single-hole ceramic membrane 101, the synchronous driving module 903 drives the rotational flow generating tube 901 to rotate, meanwhile, the rotational flow generating tube 901 injects the cleaning water flow into the single-hole ceramic membrane 101 which is rotatably connected with the rotational flow generating tube 904 through the rotary sealing member 904 and is dynamically sealed, when the cleaning water flow passes through the rotational flow generating tube 901, the rotational flow generating tube 901 drives the cleaning water flow to rotate through the plurality of radial fins 902 on the inner wall, and the cleaning water flow in the rotational flow generating tube 901 still has rotational kinetic energy when entering the hole of the single-hole ceramic membrane 101, so that the cleaning water flow advances in the single-hole ceramic membrane 101 in a rotating manner, thereby achieving the purpose of accelerating the peeling of impurities on the hole wall of the single-hole ceramic membrane 101.

Wherein, the rotary seal 904 is arranged at the connection part of the cyclone generating tube 901 and the single-hole ceramic membrane 101, and the rotary seal 904 is generally composed of a slip ring filled with polytetrafluoroethylene and a rubber O-ring embedded on the inner wall of the slip ring.

For satisfying the practicality, haplopore ceramic membrane 101 is provided with a plurality ofly, the radial cross-section of haplopore ceramic membrane 101's outer wall is regular hexagon, the mode that multiple haplopore ceramic membrane 101 leaned on each other with positive phase relative outer wall through the porous support 102 that has a plurality of mounting holes is fixed, and gas-liquid circulation annular 1011 has been seted up along circumference on the outer wall of haplopore ceramic membrane 101, communicate each other between two gas-liquid circulation annular 1011 on the adjacent haplopore ceramic membrane 101, the end connection and the intercommunication of intaking of a plurality of haplopore ceramic membrane 101 are installed with a plurality of intake end tube head 10, be provided with in the intake end tube head 10 and take place pipe 901 with a plurality of haplopore ceramic membrane 101 one.

The plurality of single-hole ceramic membranes 101 are arranged to form the structure of the cross-flow pipe 1, the plurality of single-hole ceramic membranes 101 in the hexagonal prism shape are connected in a manner that the outer walls of one sides of the plurality of single-hole ceramic membranes 101 are attached to each other, the plurality of single-hole ceramic membranes 101 are attached to each other stably, and the maximum arrangement number of the single-hole ceramic membranes 101 in the cross-flow pipe 1 with the same outer diameter is realized under the condition that the interference does not exist between the plurality of single-hole ceramic membranes. The purified water seeped out from the plurality of single-hole ceramic membranes 101 sequentially passes through the plurality of gas-liquid circulation ring grooves 1011 to flow into the purified water cavity 4, so that the defect of large purified water seepage resistance caused by filtration of the whole cross flow pipe 1 is overcome.

And, the gas-liquid circulation ring groove 1011 that sets up avoids a plurality of haplopore ceramic membranes 101 to lean on and leads to in the outside air is difficult to permeate haplopore ceramic membrane 101 when arranging, thereby avoided being difficult to permeate haplopore ceramic membrane 101 downtheholely and lead to the fact the negative effects to peeling off of impurity on the pore wall because outside air is difficult to permeate in the pipe wall of mistake flow tube 1, thereby the shortcoming that the suction of the impurity on the pipeline inner wall is difficult to relieve to the micropore that leads to the pipe wall of mistake flow tube 1 has been solved, be favorable to peeling off of the impurity on the pore wall of a plurality of haplopore ceramic membranes 101 of arranging in mistake flow tube 1.

Further, a plurality of swirl generating tubes 901 are installed in the water inlet end pipe head 10 through the same barrel-shaped supporting member 11, a plurality of rotary sealing bearings 12 penetrating through corresponding end portions are installed at both ends of the barrel-shaped supporting member 11, the swirl generating tubes 901 are rotatably inserted into two opposite rotary sealing bearings 12, and the synchronous driving assembly 903 is installed in the barrel-shaped supporting member 11.

The barrel-shaped support 11 is a barrel-shaped member having a cavity therein and sealed at the periphery, the plurality of rotary seal bearings 12 at both ends of the barrel-shaped support 11 prevent water from entering the interior of the barrel-shaped support 11 while satisfying the installation and rotation of the swirl flow generating tube 901, and the synchronous driving component 903 is installed in the barrel-shaped support 11, so that the whole mechanism is compact and reliable.

The specific structure of the synchronous drive component 903 is correspondingly set according to the number of the swirl generating tubes 901 and the arrangement mode of the swirl generating tubes 901, and the invention provides one embodiment of the synchronous drive component 903:

the synchronous driving component 903 comprises outer gear rings 9031 sleeved on the swirl generating pipes 901, a plurality of swirl generating pipes 901 are arranged on the barrel-shaped support 11 in a central array mode around the same swirl generating pipe 901, a plurality of peripheral swirl generating pipes 901 and the central swirl generating pipe 901 are meshed through corresponding outer gear rings 9031, adjacent peripheral outer gear rings 9031 are arranged at intervals, the outer sides of the plurality of peripheral outer gear rings 9031 are meshed and connected with a same inner gear ring 9032, a driving motor 9033 used for driving the inner gear ring 9032 to rotate is installed in the barrel-shaped support 11, and the driving motor 9033 is in transmission connection with the inner gear ring 9032 through a transmission component.

Preferably, seven single-hole ceramic membranes 101 are arranged, six single-hole ceramic membranes 101 are arranged around the same single-hole ceramic membrane 101, seven swirl generating tubes 901 are arranged in one-to-one correspondence with the single-hole ceramic membranes 101, and seven swirl generating channels 901 are arrayed in the same manner as seven single-hole ceramic membranes 101, to facilitate simplification of the mechanism for synchronously driving the assembly 903, namely, the outer gear rings 9031 on the six peripheral rotational flow generating tubes 901 are mutually spaced and are all meshed with the outer gear rings 9031 on the central rotational flow generating tube 901, when the driving motor 9033 drives the inner gear ring 9032 engaged with the six outer gear rings 9031 on the periphery to rotate through a gear set or a chain wheel set and other transmission components, because the positions of the swirl generating tubes 901 are fixed, the outer gear ring 9031 drives six outer gear rings 9031 to rotate at fixed positions, and simultaneously, the outer gear ring 9031 in the center is driven by the six outer gear rings 9031 to rotate.

The porous support 102 comprises a water purification conduit 3 and mounting pore plates 1021, the mounting pore plates 1021 are mounted in two ends of the water purification conduit 3 through corresponding positioning components, and a plurality of mounting holes for plugging the single-hole ceramic membrane 101 are formed in the mounting pore plates 1021 in two ends in a penetrating manner.

The end of the mounting pore plate 1021 is provided with a plurality of purified water holes 15, a purified water pipeline 16 communicated with the purified water holes 15 is arranged in the mounting pore plate 1021, and the purified water seeped from the single-hole ceramic membranes sequentially flows out through the purified water holes 15 and the purified water pipeline 16.

The purified water oozed out from the single-hole ceramic membrane 101 installed in the installation hole flows into the purified water pipe 16 through the purified water holes 15 of the installation hole plate 1021 at the water inlet end, and the purified water flowing into the staggered purified water pipe 16 through the plurality of purified water holes 15 flows into the purified water guide pipe 3 through the plurality of purified water holes 15 at the bottom of the installation hole plate 1021 by gravity and is guided out through the purified water guide pipe 3.

For example, after the mounting hole plate 1021 at one end is coaxially fixed in the water purification conduit 3 by the positioning component, two ends of the plurality of single-hole ceramic membranes 101 are sequentially inserted into the fixed mounting hole plate 1021 and the movable mounting hole plate 1021 until the single-hole ceramic membranes 101 are inserted into the mounting holes of the two mounting hole plates 1021, and then the other mounting hole plate 1021 is fixed in the water purification conduit 3 by the corresponding positioning component.

The specific installation manner of the plurality of single-hole ceramic membranes 101 is adapted to the structure of the positioning assembly, according to the above example, in the embodiment of the present invention, the positioning assembly includes the supporting legs 1022 and the radial supporting bars 1023, the side wall of the installation pore plate 1021 is supported on the inner wall of the water purification conduit 3 sequentially through the plurality of radial supporting bars 1023 and the corresponding plurality of supporting legs 1022, the installation pore plate 1021 is coaxially arranged in the water purification conduit 3 through the plurality of same radial supporting bars 1023 and the supporting legs 1022, the inner walls of the two ends of the water purification conduit 3 are provided with the circumferential limiting grooves 301 penetrating through the corresponding ends thereof, the supporting legs 1022 are slidably arranged in the circumferential limiting grooves 301, the supporting legs 1022 are provided with the fixing screws 1024 for fixing the supporting legs, and the groove walls of the circumferential limiting grooves 301 are provided with the threaded holes matched with.

The circumferential locating is carried out through the mounting hole plate 1021 connected with the supporting legs 1022 through the radial supporting rods 1023 by matching of the circumferential limiting grooves 301 and the supporting legs 1022, so that the situation that the single-hole ceramic membrane 101 is broken and difficult to mount due to the fact that the mounting hole plates 1021 at two ends rotate and the positions of a plurality of mounting holes in the mounting hole plates 1021 at two ends cannot be matched one by one is avoided.

The outer walls of the two ends of the single-hole ceramic membrane 101 are respectively provided with a thin-wall part 1014 matched with the mounting hole, the outer diameter of each thin-wall part 1014 is smaller than the outer diameter of the single-hole ceramic membrane 101, the outer diameter of each thin-wall part 1014 is matched with the inner diameter of the mounting hole, and the thin-wall parts 1014 are arranged to be matched with the mounting hole plates 1021 at the two ends to axially limit the single-hole ceramic membrane 101 so as to prevent the single-hole ceramic membrane 101 from sliding in the mounting hole.

Moreover, the rubber seal ring 8 which is in sealing fit with the outer wall of the thin-walled portion 1014 is embedded in the inner wall of the mounting hole, and the rubber seal ring 8 seals the mounting hole while avoiding collision between the single-hole ceramic membrane 101 and the wall of the mounting hole, so that when sewage is pumped into the plurality of single-hole ceramic membranes 101 through the same pipeline at the same time, the sewage passes through the gap between the thin-walled portion 1014 and the mounting hole.

The invention also provides a sewage treatment process of the column type membrane component, which comprises the following steps:

s100, detecting the filtering resistance of the single-hole ceramic membrane, and cleaning the single-hole ceramic membrane when the filtering resistance of the single-hole ceramic membrane reaches a preset value;

s200, when the single-hole ceramic membrane is cleaned, adjusting the water pressure and the flow of cleaning water flow passing through the single-hole ceramic membrane according to the aperture of the single-hole ceramic membrane so as to enable the cleaning water flow to pass through the single-hole ceramic membrane at the lowest water pressure and the maximum radial height;

s300, driving the cleaning water flow injected into the single-hole ceramic membrane to rotate through a rotational flow generating mechanism, so that the rotating cleaning water flow washes the hole wall of the single-hole ceramic membrane in the axial direction and the tangential direction to accelerate the stripping of the impurity filter cake on the hole wall of the single-hole ceramic membrane.

The mechanism drives the clean water to rotate through the rotational flow, when the rotating cleaning water flow passes through the holes of the single-hole ceramic membrane, the contact time between the cleaning water flow and the hole wall of the single-hole ceramic membrane is increased, and the tangential force can be applied to the hole wall of the single-hole ceramic membrane by the rotating cleaning water flow, so that the impurities on the hole wall of the single-hole ceramic membrane are peeled off simultaneously in the length direction and the tangential direction of the cleaning water flow, and the cleaning efficiency of the impurities attached to the hole wall of the single-hole ceramic membrane by the cleaning water flow is improved.

The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present application and such modifications and equivalents should also be considered to be within the scope of the present application.

Claims (10)

1. A column type membrane module and a sewage treatment process are characterized in that: the device comprises a single-hole ceramic membrane (101) and a rotational flow generating mechanism (9), wherein the rotational flow generating mechanism (9) is connected and communicated with the water inlet end of the single-hole ceramic membrane (101), and the rotational flow generating mechanism (9) enables cleaning water flow injected into the single-hole ceramic membrane (101) to rotate when the single-hole ceramic membrane (101) is cleaned so as to promote impurities on the inner wall of the single-hole ceramic membrane (101) to be peeled off by the cleaning water flow;

the swirl generating mechanism (9) comprises a swirl generating pipe (901), a plurality of radial fins (902) arranged on the inner wall of the swirl generating pipe (901), and a synchronous driving assembly (903) used for driving the swirl generating pipe (901) to rotate when the single-hole ceramic membrane (101) is cleaned, the rotating swirl generating pipe (901) drives the cleaning water flow passing through the inside of the swirl generating pipe to rotate through the plurality of radial fins (902), and the swirl generating pipe (901) is connected with the corresponding single-hole ceramic membrane (101) in a rotating and sealing manner through a rotating sealing element (904).

2. A column membrane module according to claim 1, wherein a plurality of the single-hole ceramic membranes (101) are provided, the radial section of the outer wall of the single-hole ceramic membrane (101) is in a regular hexagon shape, a plurality of single-hole ceramic membranes (101) are fixed in a way that the opposite outer walls are attached to each other through a porous bracket (102) with a plurality of mounting holes, and the outer wall of the single-hole ceramic membrane (101) is provided with gas-liquid circulation ring grooves (1011) along the circumferential direction, two gas-liquid circulation ring grooves (1011) on the adjacent single-hole ceramic membrane (101) are communicated with each other, the water inlet ends of a plurality of single-hole ceramic membranes (101) are connected and communicated with a water inlet end pipe head (10), the water inlet end pipe head (10) is internally provided with a plurality of swirl generating pipes (901) which are in one-to-one correspondence with the single-hole ceramic membranes (101).

3. A column type membrane module according to claim 2, wherein a plurality of the swirl generating tubes (901) are installed in the water inlet end pipe head (10) through the same barrel-shaped support member (11), a plurality of rotary seal bearings (12) penetrating the corresponding ends are installed at both ends of the barrel-shaped support member (11), the swirl generating tubes (901) are rotatably inserted into two opposite rotary seal bearings (12), and the synchronous drive assembly (903) is installed in the barrel-shaped support member (11).

4. A cylindrical membrane module according to claim 3, wherein the synchronous drive module (903) comprises an outer ring gear (9031) sleeved on the swirl generating tubes (901), a plurality of swirl generating tubes (901) are arranged on the barrel-shaped support (11) in a central array around the same swirl generating tube (901), a plurality of peripheral swirl generating tubes (901) are engaged with the central swirl generating tube (901) through the corresponding outer ring gear (9031), and the periphery is arranged between the adjacent outer gear rings (9031) at intervals, the outer sides of the plurality of outer gear rings (9031) at the periphery are engaged and connected with the same inner gear ring (9032), a driving motor (9033) for driving the inner gear ring (9032) to rotate is installed in the barrel-shaped supporting piece (11), the driving motor (9033) is in transmission connection with the inner gear ring (9032) through a transmission component.

5. A column membrane module according to claim 3, wherein seven of the single-hole ceramic membranes (101) are provided, and wherein six of the single-hole ceramic membranes (101) are provided on the barrel support (11) around the same single-hole ceramic membrane (101), seven of the swirl generating tubes (901) are provided in one-to-one correspondence with the single-hole ceramic membranes (101), and seven of the swirl generating tubes (901) are arranged in the same manner as an array of seven of the single-hole ceramic membranes (101).

6. The column type membrane module according to claim 2, wherein the porous support (102) comprises a water purification conduit (3) and an installation pore plate (1021), the installation pore plate (1021) is installed in both ends of the water purification conduit (3) through corresponding positioning components, a plurality of installation pores for the single-pore ceramic membrane (101) to be inserted are formed in the installation pore plate (1021) at both ends, and the single-pore ceramic membrane (101) and the inner wall of the water purification conduit (3) are arranged at intervals so as to facilitate the seepage of purified water generated by the filtration of the single-pore ceramic membrane (101);

a plurality of water purification holes (15) have been seted up to the tip of installation orifice plate (1021), just it is a plurality of to have seted up the intercommunication in installation orifice plate (1021 water purification pipeline (16) of water purification hole (15), by a plurality of the water purification that the haplopore ceramic membrane oozed loops through water purification hole (15) with water purification pipeline (16) flow out.

7. The cylindrical membrane module of claim 6, wherein the positioning assembly comprises supporting legs (1022) and radial supporting legs (1023), the side wall of the installation pore plate (1021) is supported on the inner wall of the purified water conduit (3) sequentially through the radial supporting legs (1023) and the supporting legs (1022), the installation pore plate (1021) is coaxially arranged in the purified water conduit (3) through the radial supporting legs (1023) and the supporting legs (1022), the supporting legs (1022) are provided with fixing screws (1024), and the inner wall of the purified water conduit (3) is provided with a plurality of threaded holes corresponding to the fixing screws (1024);

the inner walls of the two ends of the water purification conduit (3) are provided with circumferential limiting grooves (301) penetrating the corresponding end parts of the water purification conduit, the supporting legs (1022) are slidably mounted in the circumferential limiting grooves (301), and threaded holes are formed in the groove walls of the circumferential limiting grooves (301).

8. A column type membrane module according to claim 6, characterized in that the outer wall of each end of the single-hole ceramic membrane (101) is provided with a thin-wall part (1014) matched with the mounting hole, the outer diameter of the thin-wall part (1014) is smaller than that of the single-hole ceramic membrane (101), and the outer diameter of the thin-wall part (1014) is matched with the inner diameter of the mounting hole.

9. A column membrane module according to claim 8, characterised in that a rubber sealing ring (8) is fitted in the inner wall of the mounting hole in sealing engagement with the outer wall of the thin wall part (1014).

10. A process for the treatment of wastewater according to any of claims 1 to 9, comprising:

s100, detecting the filtering resistance of the single-hole ceramic membrane, and cleaning the single-hole ceramic membrane when the filtering resistance of the single-hole ceramic membrane reaches a preset value;

s200, when the single-hole ceramic membrane is cleaned, adjusting the water pressure and the flow of cleaning water flow passing through the single-hole ceramic membrane according to the aperture of the single-hole ceramic membrane so as to enable the cleaning water flow to pass through the single-hole ceramic membrane at the lowest water pressure and the maximum radial height;

s300, driving the cleaning water flow injected into the single-hole ceramic membrane to rotate through a rotational flow generating mechanism, so that the rotating cleaning water flow washes the hole wall of the single-hole ceramic membrane in the axial direction and the tangential direction to accelerate the stripping of the impurity filter cake on the hole wall of the single-hole ceramic membrane.

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