CN210356715U - Tubular membrane equipment component - Google Patents

Abstract

The utility model discloses a tubular membrane equipment subassembly, including: the membrane module comprises a liquid inlet, a cylinder, a flange plate, a pressing plate, a faceplate, a penetrating fluid outlet, a pull rod, a membrane tube, a clamping groove, a center pillar, a partition plate, a liquid outlet, a channel and a sealing head, wherein the channel is a space separated by the cylinder, the partition plate, the center pillar and the faceplate, the membrane tube is fixedly arranged in each channel in the cylinder of the membrane module, the outer side of the membrane tube is a raw material side, the inner side of the membrane tube is a penetrating fluid side, the partition plate is arranged in parallel with the membrane tube, the pull rod parallel with the membrane tube is further arranged in each channel, and threads are arranged. The tubular membrane component of the utility model not only retains the separation characteristic of membrane separation 'cross flow filtration', but also effectively improves the flowing state of raw materials in each channel, promotes the membrane flux and enhances the integration level of the membrane component equipment; the difficulty of installation, maintenance and the like of the membrane assembly is reduced, and membrane tubes are prevented from being damaged by the partition plate.

Description

Tubular membrane equipment component

Technical Field

The utility model belongs to the technical field of the membrane separation, concretely relates to tubular membrane equipment subassembly suitable for membrane separation processes such as pervaporation and gas separation purification.

Background

The pervaporation membrane separation technology is a new separation and purification technology, can be suitable for separating organic matters from water and separating an organic matter-organic matter system, wherein organic matter dehydration is studied most deeply and is partially successfully realized in industrial production and application. The separation principle is that the chemical potential difference of substances on two sides of the membrane is used as a driving force to realize mass transfer, and the difference of the affinity and the mass transfer resistance of the membrane to different component compounds in the material is used for realizing selectivity.

The pervaporation membrane module works by utilizing the principle, the pore size of the membrane tube is between the molecular dynamic diameter of the organic solvent and the molecular dynamic diameter of the water molecule, when high-temperature and high-pressure mixed gas consisting of the organic solvent and water flows through the outer surface of the membrane tube, because high vacuum exists in the membrane tube, the pressure difference existing inside and outside the membrane tube generates driving force to enable the water molecules with the kinetic diameters smaller than the pore size of the membrane tube to enter the membrane tube, and the organic solvent with the kinetic diameters larger than the pore sizes is intercepted outside the membrane tube, so the water molecules and the organic solvent molecules are effectively separated.

And traditional membrane module leads to the required membrane pipe quantity of membrane equipment to increase because membrane element permeation flux is not high seriously influences separation efficiency, and equipment appearance overall dimension grow, and the pipe connection is many, and welding part quantity is also more, finally causes equipment investment cost height, and the place space requires greatly, is unfavorable for the application popularization of membrane equipment. The reason for this is that the high-temperature and high-pressure mixed gas has a short residence time in the membrane module, a short contact time with the membrane surface, a small membrane flux per unit time and unit area, and an increased membrane area.

In general, increasing the turbulence of the mixed gas in the membrane module can be considered to increase the contact of the gas with the membrane surface for the purpose of increasing the membrane flux per unit time. The first solution is to add a flow-resisting partition plate perpendicular to the direction of the membrane tube in the membrane shell, which can reduce the existing problems to a certain extent. But simultaneously brings new problems, if the number of the added flow resisting partition plates is not enough, the effect is not obvious, and the existing problems can not be solved basically; if the number of the added flow-resisting partition plates is too large, the difficulty of processing and installing is very large, the membrane tubes are required to sequentially pass through the partition plates, the corresponding holes in each partition plate must be completely aligned on the same straight line, and the processing precision and the installation requirement of the concentricity of a plurality of holes are very high. The requirement of the design of such complex structures can also lead to the relative limitation of the number of membrane tubes installed in the membrane shell, the membrane area of unit volume membrane equipment is small, the integral integration level of the equipment is low, and meanwhile, if the number of the partition plates is too large, the special cross flow type filtration mode of membrane separation is converted into a dead-end filtration mode, so that the membrane separation device has no benefit for reducing the concentration polarization on the surface of the membrane and preventing the pollution and blockage of membrane holes. The second kind of solution is to install a longitudinal baffle plate inside the membrane module column along the direction of the membrane tube to make the raw material flow back and forth in the membrane module column, thus prolonging the retention time of the raw material in the membrane module column, overcoming the problems in installation and processing in the first kind of solution and retaining the inherent cross-flow filtration characteristic of membrane separation. The added longitudinal baffle plates which are parallel to each other are arranged in the column along the direction of the membrane tubes, the quantity distribution of the membrane tubes of each partition part is seriously uneven, the heavier the load of separating and removing water at the front end of the feed liquid of the raw materials is, the quantity of the membrane tubes at the places where the load is not ensured by the existing distribution mode is large, the separation efficiency of the membrane tubes under the load is sharply reduced and easily polluted and blocked, the cleaning and replacing frequency of the membrane tubes is accelerated, the production cycle efficiency is finally reduced, and the use cost is increased.

Disclosure of Invention

An object of the utility model is to provide a tubular membrane equipment subassembly realizes the flux promotion of unit membrane area, improves the integrated level of membrane module simultaneously, reduces equipment investment cost and area to easily installation maintenance.

The utility model discloses it is more reasonable mainly to realize that membrane pipe number distributes through changing structural design, increases the torrent degree that the pull rod improves the raw materials, tubular membrane equipment subassembly includes casing, membrane pipe, baffle and center pillar, the center pillar is located the center of casing inner space, the baffle is at center pillar circumference even installation, divides the casing inner space a plurality of shares, installs a plurality of membrane pipes in the same direction as the center pillar direction between every two adjacent baffles, forms the separation channel who uses two blocks of adjacent baffles as the border, along first passageway to last passageway of center pillar circumference, adjacent two passageways communicate with each other end to end, the inlet that sets up on first passageway and the casing communicates with each other, the play liquid mouth that sets up on last passageway and the casing communicates with each other, the penetrant export that sets up on the membrane pipe of every separation channel and the casing communicates with each other.

Furthermore, the shell is cylindrical and comprises a cylindrical shell body and end sockets at two ends of the shell.

Furthermore, the center pillar is a cylinder, a clamping groove matched with the partition board installation edge is formed in the axial direction of the center pillar, a clamping groove corresponding to the partition board is formed in the inner wall of the shell, the partition board is installed between the center pillar and the inner wall of the shell through the clamping groove, the plane where the partition board is located is the radial direction of the shell, and the space in the shell is equally divided into a plurality of parts.

Further, the shell body both ends are provided with the flower disc that matches with shell cross sectional shape, be provided with the draw-in groove that matches with the terminal surface of baffle on the flower disc, follow the center pillar direction from first baffle to last baffle, the terminal surface of baffle is installed on two flower discs through the draw-in groove with controlling the interval. That is, only one end of each partition board is installed on the flower disc, if the previous partition board is installed on the left flower disc, the next partition board is installed on the right flower disc, and the two adjacent separation channels are communicated.

Furthermore, the partition board between the first channel for the raw material to flow in and the last channel for the raw material to flow out is mounted on the flower disc at two ends and sealed, and the two channels are completely separated.

Furthermore, a plurality of pull rods are arranged in the separation channel in parallel to the membrane tubes, and the pull rods and the membrane tubes are distributed at intervals.

Furthermore, both ends of the pull rod and the membrane tube are arranged on the flower disc. The membrane tube and the pull rod are both fixedly installed in parallel to the partition plate.

Further, the surface of the pull rod is provided with threads.

Furthermore, pressing plates are arranged at two ends of the shell body, mounting holes matched with the pull rod and the membrane tube are formed in the flower disc, two ends of the pull rod and two ends of the membrane tube are fixed to the flower disc through the mounting holes, and the pressing plates are attached to the back face of the flower disc and tightly press the back face of the flower disc to fix the pull rod and the membrane tube together. Preferably, the end parts of the membrane pipes are respectively provided with a convex O-shaped ring, the membrane pipes penetrate through the flower disc and are clamped by the convex O-shaped rings, and meanwhile, the pressure plate is pressed on the back surface (the other surface which is not adjacent to the space in the shell) of the flower disc. More optionally, the back of the faceplate is provided with a groove matched with the O-shaped ring, so that the flat pressing plate can be tightly attached to the back of the faceplate.

Furthermore, the shell is of an oval section or a polygonal section, and the partition plates are correspondingly arranged, so that the space in the shell can be divided into a plurality of parts.

Furthermore, the number of the partition plates is 3-8, and the number of the partition plates is equal to that of the clamping grooves in the center column.

Further, the seal head is connected with the shell body through a flange.

Further, the liquid inlet and the liquid outlet are arranged on the shell, and the penetrating fluid outlet is arranged on the sealing head.

Furthermore, one end of the membrane tube close to the penetrating fluid outlet is communicated and converged into the same pipeline through a pipeline and then is communicated with the penetrating fluid outlet on the end socket. The penetrating fluid outlet is connected with a penetrating fluid storage tank.

During operation, the raw materials by the inlet gets into, turns back in each in proper order in the passageway, separates through the membrane tube simultaneously, from last install on the passageway the liquid outlet flows, through the vacuum apparatus on the storage tank, and vapor permeates the membrane tube under the vacuum effect, assembles inside the membrane tube, cools off soon and becomes liquid water, flows down the lower extreme naturally under gravity and vacuum effect, and the water that all membrane tubes flow assembles the head position, flows into the penetrant storage tank through the pipeline again. The membrane component is mainly used for membrane separation processes such as external pressure type tubular membranes and the like, and is particularly suitable for membrane separation processes such as pervaporation, gas separation and purification and the like.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. membrane module, baffle are on a parallel with the installation of membrane pipe, have reduced the high accuracy requirement of processing, have also avoided the membrane pipe to perforate probably by the risk of fish tail to and the transverse installation baffle extrudees the membrane pipe of damaging because of the disturbance that quick air current brought, and the installation of the membrane pipe of being convenient for is dismantled.

2. Membrane module both remain the separation characteristic of membrane separation "cross-flow filtration", improve the mobile state of raw materials in each passageway again effectively, promoted the membrane tube area of unit volume membrane module, promoted membrane flux simultaneously, strengthened the integrated level of membrane module equipment, reduce equipment investment cost and area to easily installation and maintenance.

3. Membrane module, the pull rod surface is the thread form of whole root, and the feedstream is when the pull rod surface, because the influence of surface screw thread, can take place the change of flow direction and produce the disturbance of each indefinite direction in the steam flow of membrane tube direction, has strengthened the torrent degree of raw materials on membrane tube surface, is showing and is reducing membrane tube surface concentration polarization phenomenon, has promoted the flux of unit membrane area equally.

4. Tubular membrane module, can be according to the dewatering load distribution condition that membrane separation design result shows freely adjust required membrane tube quantity in the quantity of passageway and each passageway, the direction and the position of the draw-in groove on the center pillar that correspond adjustment column section of thick bamboo inner wall and middle setting can.

Drawings

FIG. 1 is a schematic front view of the overall structure of the tubular membrane module of the present invention;

FIG. 2 is a schematic cross-sectional view of a tubular membrane module according to the present invention;

FIG. 3 is a schematic cross-sectional view of a tubular membrane module according to the present invention;

fig. 4 is a schematic cross-sectional view of the tubular membrane module of the present invention after the membrane tube is filled with the membrane tube.

FIG. 5 is a schematic view of a faceplate of the tubular membrane module of the present invention;

fig. 6 is a schematic view of a pressing plate of the tubular membrane module according to the present invention.

In the figure, 1-liquid inlet, 2-column (shell), 3A, 3B, 3C, 3D-flange, 4A, 4B-pressing plate, 5A, 5B-flower disc, 6-penetrating fluid outlet, 7-pull rod, 8-membrane tube, 9-clamping groove, 10-center column, 11-clapboard, 12-liquid outlet, 81, 82, 83, 84, 85, 86-channel.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments. It will be understood by those skilled in the art that the following examples are illustrative of the present invention only and should not be taken as limiting the scope of the invention. According to the techniques or conditions described in the literature of the art or according to the product specifications.

Example 1

The tubular membrane plant module according to the present embodiment is shown in fig. 1 and comprises a housing 2, a membrane tube 8, six partition plates 11 and a center column 10. The shell is a cylindrical column barrel and is composed of a cylindrical shell body and end sockets at two ends of the shell body, and the end sockets are connected with the shell body through flanges 3A, 3B, 3C and 3D. The center pillar is located the axis of casing, the baffle is evenly installed in center pillar circumference, divides the casing inner space into a plurality of parts, installs a plurality of membrane pipes 8 in the direction of the center pillar between every two adjacent baffles, forms the separation channel who uses every two adjacent baffles as the border, along the first passageway to the last passageway of center pillar circumference, adjacent two passageways communicate with each other end to end, the inlet that sets up on first passageway and the casing communicates with each other, last passageway communicates with each other with the play liquid mouth 12 that sets up on the casing, the membrane pipe of every separation channel communicates with each other with the penetrant export 6 that sets up on the casing. The middle column is a cylinder, a clamping groove 9 matched with the installation edge of the partition board is formed in the axial direction of the middle column, a clamping groove corresponding to the partition board is formed in the inner wall of the shell, the partition board is installed between the middle column and the inner wall of the shell through the clamping groove, the plane where the partition board is located is the radial direction of the shell, and the space in the shell is equally divided into a plurality of parts. The liquid inlet and the liquid outlet are arranged on the shell, and the penetrating fluid outlet is arranged on the sealing head.

The shell comprises a shell body and is characterized in that flower discs 5A and 5B matched with the cross section of the shell body are arranged at two ends of the shell body, clamping grooves matched with the end faces of the partition plates are formed in the flower discs, the middle column direction is from the first partition plate to the last partition plate, and the end faces of the partition plates are installed on the two flower discs through the clamping grooves at left and right intervals. That is, only one end of each partition board is installed on the flower disc, if the previous partition board is installed on the left flower disc, the next partition board is installed on the right flower disc, and the two adjacent separation channels are communicated. The partition board between the first channel for the raw material to flow in and the last channel for the raw material to flow out has two ends installed on the flower disc and is sealed, so that the two channels are completely separated. A plurality of pull rods 7 are arranged in the separation channel in parallel to the membrane tubes, threads are arranged on the surfaces of the pull rods, and the pull rods and the membrane tubes are distributed at intervals. The pull rod and the two ends of the membrane tube are both arranged on the flower disc and are fixedly arranged in parallel with the partition plate. The shell body both ends are provided with clamp plate 4A, 4B, set up on the flower disc and match the mounting hole with pull rod and membrane tube pipe through matcing, pull rod and membrane tube both ends are passed through the mounting hole and are fixed on the flower disc, clamp plate and flower disc back laminating and compress tightly jointly fixed pull rod and membrane tube. The membrane pipe tip respectively sets up a evagination O type circle, and the membrane pipe passes the flower disc, blocks through the O type circle of evagination, and the clamp plate compresses tightly at the back of flower disc (the another side that does not face the casing space) simultaneously. The back of the flower disc is provided with a groove matched with the O-shaped ring, so that the flat pressing plate can be tightly attached to the back of the flower disc. One end of each membrane tube, which is far away from the penetrating fluid outlet, is sealed, and the other ends of the membrane tubes are communicated and converged into the same pipeline through the pipeline and then are communicated with the penetrating fluid outlet on the end socket. The penetrating fluid outlet is connected with a penetrating fluid storage tank.

The working process of the membrane module is as follows:

the column casing 2 is cylindrical and is respectively connected with two end sockets through a flange 3, one end socket is provided with a penetrating fluid outlet 6, six partition plates 11 are provided, the partition plates 11 divide the column casing 2 into six channels, the six channels are hermetically and fixedly arranged through the column casing 2, a middle column 10 and clamping grooves on the flower discs 5A-5B, a liquid inlet 1 is arranged at the upper part of the outer wall of the column casing of a first channel 81, raw materials flowing into the membrane module from the liquid inlet 1 flow to the tail part of the channel 81 from the head part of the channel 81, the tail part of the channel 81 and the head part of the channel 82 are mutually communicated through a gap between the partition plates 11 and the flower discs 5A, then the raw materials flow to the tail part of the channel 83 from the head part of the channel 82 again, the tail part of the channel 82 and the head part of the channel 83 are mutually communicated through a gap between the partition plates 11 and the flower discs 5B, then the raw materials flow to the tail part of the channel 83 again from, the raw material flows from the head of the channel 84 to the tail of the channel 84, the tail of the channel 84 and the head of the channel 85 are communicated with each other through the gap between the partition plate 11 and the flower disc 5B, the raw material flows from the head of the channel 85 to the tail of the channel 85, the tail of the channel 85 and the head of the channel 86 are communicated with each other through the gap between the partition plate 11 and the flower disc 5A, the raw material flows from the head of the channel 86 to the tail of the channel 86, the end, between the tail of the channel 86 and the head of the channel 81, of the partition plate 11 is inserted into the clamping groove of the flower disc 5B and sealed, the channel 86 and the channel 81 are completely separated, and the separated material can only flow out of the membrane module from the liquid outlet 12 arranged on the.

And filling required number of membrane tubes 8 and pull rods 7 in each channel obtained by dividing the partition plate 11 according to the separation calculation requirement, wherein the membrane tubes 8 and the pull rods 7 are both installed and fixed on the flower discs 5A and 5B. The pressing plate 4B forms a seal with the head end of the flower disc 5B and the head end of the sealing piece matching membrane tube 8, the pressing plate 4A forms a seal structure with the tail end of the flower disc 5A and the tail end of the sealing piece matching membrane tube 8, and the head end and tail end seal structures are used for isolating and sealing the inside and the outside of the tube membrane 8. The outer side of the membrane tubes 8, namely the raw material side flows among the membrane tubes 8, and the inner part of the membrane tubes 8 is communicated with the penetrating fluid outlet 6 on the end socket to form a penetrating fluid side. The pressing plate 4B completely closes the membrane ports of all the membrane tubes close to the pressing plate 4B, the pressing plate 4A only closes the tube heads of the membrane tubes in a sealing manner, the openings of all the tube ports are gathered together, and the water permeating through the membrane tubes is gathered together and flows out of the membrane assembly from the penetrating fluid outlet 6 on the end socket.

The membrane component is suitable for membrane separation processes such as tubular membranes and the like, and is particularly suitable for membrane separation processes such as pervaporation, vapor permeation, gas separation and the like.

After the membrane tube 8 adopts a pervaporation membrane tube, a penetrating fluid component selectively permeates a membrane separation layer on the outer surface of the membrane tube 8 to enter the inner side of the membrane tube 8 under the condition that external vacuum is connected to one side of a penetrating fluid outlet 6 and the pressure difference formed between the inner side and the outer side of the membrane tube 8 is used as pushing force, and the penetrating fluid component enters a condenser under the action of vacuum to be condensed into a penetrating fluid component in a liquid state and finally flows into a penetrating fluid storage tank.

The utility model provides an among the technical scheme, through set up baffle 11 in column casing 2 for the raw materials comes and goes back in the membrane module, increases its and the contact time on membrane tube surface, and the penetrant component is separated more thoroughly. Through arranging the pull rods with the surfaces being fully distributed with the threads in the channels 81-86, the flow mode of the raw materials in the membrane component is improved, the turbulence intensity of the raw materials in the membrane component is enhanced, the cross flow type filtering characteristic of the membrane surface is fully kept, the raw materials scour the surface of the membrane tube 8 at a high speed, and the problem of membrane flux attenuation caused by concentration polarization is greatly destroyed, so that the quantity demand of the membrane area is reduced, the pollution blockage of the membrane tube 8 is also relieved, the membrane component cleaning and regeneration frequency is reduced, and the service life of the membrane tube 8 is prolonged. The partition plate 11 is arranged in the column casing 2 and is fixed in the direction parallel to the membrane tube 8, so that the membrane tube 8 and the partition plate 11 are effectively prevented from being damaged, the high-precision requirement in the processing link is reduced, the disassembly difficulty in the installation and maintenance work is simplified, and the production cost of the membrane assembly is greatly reduced.

Example 2

In this embodiment, the number of the partition plates is set to any number of integers of 2-12, the clamping grooves on the central column 10, the column casing 2 and the flower discs 5A-5B are adjusted accordingly, raw materials flow into the membrane module from the liquid inlet 1, return to and fro in the membrane module to flow at high speed, flow out of the membrane module from the liquid outlet 12, and permeate components are collected into the permeate storage tank through the permeate outlet 6, and the implementation result is also expected.

Example 3

In this embodiment, the difference from example 1 is: the cross section of the column casing 2 is a polygon, the number of the polygons can be any integer between 3 and 10, the actual number of the polygons is determined according to previous membrane separation design calculation, the side length of the polygons is determined according to the number of the membrane tubes 8 required in each channel, or is completely equal or not equal, the number of the partition plates is set to be consistent with the number of the sides of the polygons, the clamping grooves on the middle column 10, the column casing 2 and the flower discs 5A-5B are adjusted accordingly, raw materials also flow into the membrane module from the liquid inlet 1, flow back and forth in the membrane module at high speed, flow out of the membrane module from the liquid outlet 12, and permeate components are collected into the permeate storage tank through the permeate outlet 6, and the implementation result also achieves the.

Example 4

In this embodiment, the difference from example 1 is: the cross section of the column casing 2 is oval, the cross section of the central column 10 is also oval or polygonal, if the central column 10 is polygonal, the number of actual edges is determined according to the previous membrane separation design calculation, the number of partition plates is also determined according to the previous membrane separation design calculation, clamping grooves on the central column 10, the column casing 2 and the flower discs 5A-5B are adjusted accordingly, raw materials also flow into the membrane module from the liquid inlet 1, return to and return to high-speed flow in the membrane module, flow out of the membrane module from the liquid outlet 12, and permeate components are collected into the permeate storage tank through the permeate outlet 6, and the implementation result is also expected.

Claims (10)

1. The utility model provides a tubular membrane equipment subassembly, its characterized in that, the structure includes casing, membrane tube, baffle and center pillar, the center pillar is located the center of casing inner space, the baffle is evenly installed in center pillar circumference, divides the casing inner space a plurality of shares, installs a plurality of membrane tubes in the same direction as the center pillar direction between every two adjacent baffles, forms the separation channel who uses every two adjacent baffles as the border, along the first passageway of center pillar circumference to last passageway, adjacent two passageway end to end communicates with each other, and the inlet that sets up on first passageway and the casing communicates with each other, and the play liquid mouth that sets up on last passageway and the casing communicates with each other, the permeate liquid mouth that sets up on the membrane tube of every separation channel and the casing communicates with each other.

2. The tubular membrane plant module according to claim 1, wherein the housing is cylindrical and is formed by a cylindrical housing body and end caps at both ends of the housing.

3. The tubular membrane equipment assembly of claim 2, wherein the center pillar is a cylinder, a slot matching with the mounting edge of the partition is formed along the axial direction of the pillar, a slot corresponding to the partition is formed in the inner wall of the housing, and the partition is mounted between the center pillar and the inner wall of the housing through the slot to divide the space in the housing into a plurality of parts.

4. The tubular membrane equipment assembly according to claim 2, wherein the shell body is provided with flower discs at two ends thereof, the flower discs are matched with the cross-sectional shape of the shell body, clamping grooves matched with the end faces of the partition plates are arranged on the flower discs, the end faces of the partition plates are arranged on the two flower discs at left and right intervals from the first partition plate to the last partition plate along the direction of the center column through the clamping grooves.

5. The membrane plant module according to claim 4, wherein the partition between the first channel for the inflow of the raw material and the last channel for the outflow of the raw material is installed on the faceplate and sealed at both ends.

6. The tubular membrane plant module according to claim 2, wherein a plurality of tie rods are mounted in the separation channel parallel to the membrane tubes, the tie rods being spaced apart from the membrane tubes.

7. The tubular membrane plant module according to claim 6, wherein both the tie rod and the membrane tube are mounted on a faceplate; the membrane tube and the pull rod are both fixedly installed in parallel to the partition plate.

8. The tubular membrane plant module according to claim 6, wherein the tie rod surface is provided with threads.

9. The tubular membrane equipment assembly of claim 7, wherein the pressing plates are arranged at two ends of the shell body, the flower disc is provided with mounting holes matched with the pull rod and the membrane tube, two ends of the pull rod and the membrane tube are fixed on the flower disc through the mounting holes, and the pressing plates are attached to the back of the flower disc and tightly press the back of the flower disc to jointly fix the pull rod and the membrane tube.

10. The tubular membrane equipment assembly of claim 2, wherein the shell has an elliptical cross-section or a polygonal cross-section, and the partition plates are correspondingly arranged so as to divide the space in the shell into a plurality of parts; the center pillar is oval cross-section or polygon cross-section, and the baffle corresponds the installation, satisfies can be with the space in the casing divide into a plurality of parts can.

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