JP4697120B2 - Fluid separation membrane module - Google Patents

Description

  The present invention relates to a fluid separation module having a structure in which a cap portion can be separated among fluid separation modules incorporating a fluid separation membrane.

  In recent years, the spread of separation and purification technology using membrane separation technology has been highly appreciated due to its high-level separation function and energy saving features. Examples of its application fields are production of fresh water by desalination of seawater and brine, surface water and groundwater drinking water, production of pure water and ultrapure water used in the semiconductor industry and pharmaceutical industry, domestic wastewater and industrial wastewater, Sewerage treatment of municipal sewage and water recovery from wastewater, recovery of valuable materials from fermentation liquor and waste liquid, etc., liquid treatment field, oxygen enrichment and nitrogen enrichment from air, helium recovery from natural gas It is widely used in a wide range of fields, such as the gas separation field of carbon dioxide gas in the third recovery of oil.

  The fluid separation device used in the membrane separation technology requires a fluid separation membrane module, a part having a function of supplying a fluid to be processed to the fluid separation module, and a part having a function of taking out a permeated fluid. A part having a take-out function, a part having a pre-processing function for a non-processing fluid, a part having a post-processing function for a permeating fluid and a non-permeating fluid, a part having a cleaning regeneration function for a separation membrane, and the like are mounted.

  A fluid separation membrane is a liquid separation membrane such as a reverse osmosis membrane, nanofiltration membrane, ultrafiltration membrane, microfiltration membrane, or oxygen-enriched membrane, nitrogen separation membrane, carbon dioxide gas separation based on the separation target and separation mechanism. It is classified as a gas separation membrane such as a membrane. On the other hand, when focusing on the form of fluid separation, it is classified into a hollow fiber membrane, a tubular membrane, a flat membrane, a spiral membrane and the like. The fluid separation membrane module is one obtained by assembling these fluid separation membranes into a usable form by connecting pipes.

  Here, the case where a fluid separation membrane module is used for the apparatus which obtains purified water from surface water or groundwater using a fluid separation membrane module, ie, a membrane water purification apparatus, is demonstrated as an example.

  In a membrane water purification apparatus in which a plurality of fluid separation membranes are mounted and operated in parallel, the supply water is supplied to the supply water inlet of each module via a supply water header pipe and a supply branch pipe. In addition, it is sent to a use point through a permeate branch pipe and a permeate header pipe connected to the permeate outlet of each module. Circulating water piping, cleaning water supply piping, cleaning water discharge piping, air supply piping, etc. are further connected to the fluid separation membrane module as required for the raw water quality, operating conditions, characteristics of the fluid separation membrane module used, etc. The same applies to these.

  The number of membrane modules installed in the membrane water purification system is designed so that the required effective membrane area is designed and met based on the design production water volume, design raw water quality, design operation conditions, design washing conditions, etc. To be determined. However, the required effective membrane area of the membrane water purification device changes from the initial design value of the membrane water purification device due to improvements in membrane performance of the fluid separation membrane, changes in raw water quality, changes in demand for production water, etc. Sometimes.

  For example, if the membrane performance is improved and the water permeability is improved, or if the load on the membrane is reduced by introducing a pretreatment process, or if the water demand is reduced, the effective membrane area required by the membrane water purification device is reduced. To do. In this case, the effective membrane area of the membrane water purification apparatus can be reduced by reducing the number of fluid separation membrane modules to be connected and plugging them into branch pipes to which no membrane modules are connected. However, in this method, a bag path portion is formed in the branch pipe portion. The supply water contains various contaminants, and these may accumulate in the pouch path of the piping. In addition, a part of the supply water pipe is often used as a backwash pipe. In that case, there is a possibility that a part of turbidity or the like peeled off from the membrane surface by backwashing will accumulate in this bag path. is there. Contaminants, turbidity, and the like accumulated in the pouch path may cause bacterial growth and off-flavor generation, which is not preferable. In order to prevent such a situation, it is preferable to avoid forming a narrow path portion in the pipe as much as possible.

  Conversely, as the case where the required effective membrane area increases, it can be assumed that raw water quality deteriorates or water demand increases. Assuming such a situation, if a space for adding a fluid separation membrane module is set in advance in the membrane water purification device, it can be used, but if there is no additional space or if there is a shortage of additional space In this case, a new membrane water purification device must be installed, which requires a large amount of cost and a large installation space.

  These problems can be solved if a water purification membrane module having a reduced or increased effective membrane area than the existing water purification membrane module can be installed in the existing fluid separation membrane module installation space of the existing membrane water purification device. . The increase or decrease of the effective membrane area can be realized by increasing or decreasing the membrane area to be filled and increasing or decreasing the outer diameter of the fluid separation membrane module accordingly.

  In addition, even when the required effective membrane area of the water purification membrane device is not particularly changed, when replacing the fluid separation membrane module due to deterioration of the fluid separation membrane, other brands different from the existing fluid separation membrane module are used. Alternatively, there may be a requirement to exchange for another manufacturer's product.

When exchanging the fluid separation membrane module, the connecting portion between the branch pipe branched from the header pipe and the fluid separation membrane module is removed, and a new fluid separation membrane module is connected. At this time, the fluid separation membrane module can be separated into a cap portion having a fluid inlet / outlet and a case portion filled with a fluid separation membrane, and the fluid inlet / outlet of the cap portion is connected to a branch pipe extending from the header pipe. In this case, it is possible to use the existing cap again and replace only the case portion. If the cap can be reused, it is advantageous from the viewpoint of resource saving, and it is also preferable because it reduces the number of man-hours required for replacing the fluid separation membrane module. Examples of the separation type fluid separation membrane module that can separate the cap and the case part include Patent Document 1 and Patent Document 2, both of which are based on the assumption that the outer diameters of the cap and the case are the same. It is.
Japanese Patent No. 3529450 Japanese Patent No. 3616131

  However, conventionally, the cap and the case are designed exclusively for each brand of the fluid separation membrane module or for each manufacturer, and are not compatible because there is no common standard. For this reason, when the fluid separation membrane module is replaced with a separation membrane module of another brand or another manufacturer, the cap cannot be reused. In particular, caps made of metal materials such as stainless steel have higher durability than fluid separation membranes, and can be used even when fluid separation membranes need to be replaced, even though they can be used. Will be done. The cap on the left can be a waste of metal resources and a waste disposal facility if it is discarded as it is, and even if it is recovered and recycled as a metal resource, new energy must be input for recovery and recovery. However, there was a problem compared to the continued use of the cap.

  Needless to say, the problems described above are not a special problem of only the water purification membrane apparatus, but a problem common to all fluid separation membrane apparatuses.

  The present invention has been made to solve the above problems, and in a fluid separation membrane module of a type in which the case portion and the cap can be separated, the case and the cap are liquid-tight even if the outer diameters of the case and the cap are different. It is an object to provide a fluid separation membrane module that can be connected.

  The present invention includes a substantially cylindrical case having at least one opening on the outer peripheral surface, a separation membrane for fluid separation installed in the case, a substantially circular end connected to the case, and at least one A fluid separation membrane module having an opening and a cap connected to one end or both ends of the case, wherein the case and the cap have different outer diameters at the end faces that are in contact with each other. Liquid-tight contact with the large-diameter end surface having the larger outer diameter of the end surfaces and the outer peripheral surface coupled to the smaller-diameter end surface having the smaller outer diameter of the end surfaces of the case and the cap. An annular rubber-like elastic body, and an annular fastening band that presses the rubber-like elastic body against the outer peripheral surface coupled to the large-diameter end surface and the small-diameter end surface.

  In the fluid separation membrane module, the rubber-like elastic body extends annularly along the large-diameter end face, and a first lip directed to an outer peripheral face coupled to the small-diameter end face, and the outer peripheral face The base ends of the second lip, which extends in a ring shape along the tip, are connected to the first lip and the second lip so that the tips do not contact each other. It is preferable that it is comprised from the cyclic | annular connection part which carries out.

  The rubber-like elastic body has an angle formed between the outer surface of the first lip and the outer surface of the second lip in a longitudinal sectional view in an uncompressed state coupled to the large-diameter end surface and the small-diameter end surface. It is preferable that the angle is smaller than the angle formed with the outer peripheral surface.

  In the fluid separation membrane module, the band includes a locking portion for fastening the case and the cap, and the locking portion is engaged with each end of the case and the cap connected to each other. It is preferable that a locked portion for stopping is provided.

  The case in the present invention is a substantially cylindrical container filled with a fluid separation membrane, and has at least one opening on the outer peripheral surface thereof. The opening on the left functions as a fluid inlet / outlet port. The material of the case is not particularly limited, but engineering plastics such as glass fiber reinforced resin, vinyl chloride resin and polysulfone resin, and stainless steel are suitable examples. The glass fiber reinforced resin is particularly lightweight as a case material because it is lightweight and excellent in corrosion resistance and has good adhesion to the fluid separation membrane sealing resin.

  When the outer diameter of the end face connected to the cap in the case is smaller than the outer diameter of the end face connected to the case in the cap, the rubber-like elastic body on the outer peripheral surface near the end connected to the cap of the case The contacting part must be smooth so that the contact with the rubber-like elastic body is liquid-tight. Conversely, when the outer diameter of the end surface of the case is larger than the outer diameter of the end surface of the cap, the portion of the end surface of the case where the rubber-like elastic body comes into contact is liquid-tight. It must be as smooth as possible. Moreover, in order to maintain liquid-tightness, the coating film surface may be highly smooth, may not be permeated through the fluid used, and may be coated with a paint that is durable against the fluid used. The portions that do not come into contact with the rubber-like elastic body may have irregularities and coloring on the inner peripheral surface, outer peripheral surface, and end surface thereof according to functional or design requirements.

  The cap in the present invention is installed at one or both ends of the case and has at least one opening. The opening on the left functions as a fluid inlet / outlet port. The material of the cap is not particularly limited, but glass fiber reinforced resin, polysulfone resin, vinyl chloride resin, and stainless steel are suitable examples. Stainless steel is excellent in strength and durability, and if this is used as a cap material, the cap can be reused when replacing the case due to changes in the required membrane area of the fluid separation device or deterioration of the fluid separation membrane. Is particularly preferred.

  Moreover, it is preferable that the cap in this invention is comprised with the end plate. There are various types of end plates, such as a dish shape, a regular semi-ellipsoidal shape, an approximate semi-elliptical shape, a hemispherical shape, and a flat mirror shape, and any shape may be used. By using the end plate, the thickness can be reduced compared to a simple bottomed cylindrical type, and the weight can be reduced and the cost can be reduced.

  When the outer diameter of the end surface connected to the cap case is smaller than the outer diameter of the end surface connected to the case cap, the rubber-like elastic body on the outer peripheral surface near the end connected to the cap case is The contacting part must be smooth so that the contact with the rubber-like elastic body is liquid-tight. Conversely, when the outer diameter of the end face of the cap is larger than the outer diameter of the end face of the case, the portion of the end face of the cap that is in contact with the rubber elastic body is liquid-tight. It must be as smooth as possible. Moreover, in order to maintain liquid-tightness, the coating film surface may be highly smooth and does not transmit the fluid used, and may be coated with a paint that is durable to the fluid used. The portions that do not come into contact with the rubber-like elastic body may have irregularities and coloring on the inner peripheral surface, outer peripheral surface, and end surface thereof according to functional or design requirements.

  The rubber-like elastic body in the present invention has a substantially annular form and is made of a material having rubber-like elasticity at the use temperature of the fluid separation membrane. The material of the rubber-like elastic body is not particularly limited, but it is important to select a material that is not affected by the processing fluid. Suitable examples include hydrogenated nitrile rubber, nitrile rubber, urethane rubber, fluorine rubber, silicon rubber, and the like.

  In the rubber-like elastic body according to the present invention, the first lip extends along the large-diameter end surface and the second lip extends along the outer peripheral surface coupled to the small-diameter end surface in a state where the rubber-like elastic body is attached to the fluid separation membrane module. Each extending in a ring. Therefore, in a longitudinal sectional view in a non-compressed state before assembly of the fluid separation membrane module, the angle formed by the outer surface of the first lip and the outer surface of the second lip of the rubber-like elastic body is an angle between the large-diameter end surface and the small-diameter If the angle is smaller than the angle formed with the outer peripheral surface coupled to the end surface, the first lip is pressed against the large-diameter end surface and the second lip is pressed against the outer peripheral surface coupled to the small-diameter end surface when assembled. As a result, the liquid tightness is increased.

  In addition, when the first lip and the second lip are configured to be connected by a connecting portion that connects the base end portions so that the tip ends of the first lip and the second lip are not in contact with each other, fluid can flow inside the case and the cap. When pressure is supplied, fluid also flows into the inside of the pair of lips, and the pressure of the fluid flowing into the recess formed by the first lip, the second lip, and the connecting portion causes the first lip to The second lip is pressed against the outer peripheral surface coupled to the small-diameter end surface on the large-diameter end surface, and the liquid tightness retention is further enhanced.

  The tightening band in the present invention covers the rubber-like elastic body, and tightens the fastening band in the diameter-reducing direction so that the rubber-like elastic body is formed on the outer peripheral surface coupled to the large-diameter end surface and the small-diameter end surface. Is to press. A conventionally known method can be applied as a method of fastening the fastening band. For example, the projection shape with respect to a plane perpendicular to the axis of the fluid separation membrane module is made into two segments having a substantially semicircular arc shape, opposed to each other, and tightened in the direction of diameter reduction with a screw or the like. It is possible to apply a method such as tightening in the direction of diameter reduction by drawing the cut portions close to each other using screws or the like. FIG. 5 is a schematic diagram of a tightening band in the case of tightening with screws in the two cases shown on the left.

  In the present invention, the surface of the rubber-like elastic body that comes into contact with the fastening band is called a rubber-like elastic body back surface, and the surface of the fastening band that comes into contact with the rubber-like elastic body is called a fastening band belly surface. The abdomen of the fastening band presses the back surface of the rubber-like elastic body so that the rubber-like elastic body can be brought into close contact with the outer peripheral surface coupled to the large-diameter end surface and the small-diameter end surface. The shape must correspond to the back of the body. The portions other than the abdomen surface of the tightening band may be uneven or colored according to functional or design requirements. For example, applying a rib structure to the outer peripheral portion of the tightening band to reduce the weight while maintaining the necessary strength is one preferred embodiment. The material of the fastening band is not particularly limited, but it needs to be strong enough to withstand the internal pressure applied to the case and the cap. Examples of suitable materials include carbon steel, stainless steel, and cast iron.

  According to the fluid separation membrane module of the present invention, the case and the cap can be liquid-tightly fastened even if the outer diameters of the end surfaces of the case and the cap that are in contact with each other do not match.

  Hereinafter, as an embodiment of a fluid separation membrane module according to the present invention, a hollow fiber type internal pressure type water purification membrane module will be described as an example with reference to the drawings.

  FIG. 1 shows the entire internal pressure hollow fiber type water purification membrane module of an example of this embodiment when the outer diameter of the end surface connected to the case in the cap is larger than the outer diameter of the end surface connected to the cap in the case. It is a schematic diagram shown. This membrane module includes a cylindrical case 100 and a pair of caps 200 and 300 that close both ends in the axial direction. Each of the caps 200 and 300 includes a cap body 220 or 320 having an end plate shape, and openings 230 and 330 are formed, respectively. On the other hand, a plurality of hollow fiber membranes 400 are arranged in the case 100 so as to extend in the axial direction, and water is purified by the hollow fiber membranes 400. The length of each hollow fiber membrane 400 is substantially the same as that of the case main body 100, and the upper end portion and the lower end portion thereof are sealed and fixed to the case main body 100 by the sealing resin 500. That is, the resin 500 is filled in the gaps between the plurality of hollow fiber membranes 400 and the gaps between the hollow fiber membranes 400 and the inner wall surface of the case body 100, thereby fixing the hollow fiber membranes 400 in a liquid-tight manner. Thus, as for the hollow fiber membrane 400, only an upper end part and a lower end part are being fixed with sealing resin 500, and other intermediate parts fulfill | perform a water purifying function. In addition, openings 130 and 120 are formed on the outer peripheral surface near the upper end and the lower end of the case 100.

  The pressurized raw water is supplied to the inside of the hollow fiber membrane through the opening 230, and a part or all of the raw water passes through the hollow fiber membrane and flows out of the membrane module through the opening 130, and this becomes the production water, and the rest Flows out from the opening 330 without being filtered. Since raw water contains various contaminants, membrane filtration resistance increases when membrane filtration is continued. In order to reset this, it is common to perform backwashing periodically, but at this time, clean water or clean water containing an appropriate cleaning agent is added from one or both of the openings 120 and 130. Pressure is supplied and discharged from one or both of the openings 230 and 330.

  In the above embodiment, the openings 230 and 330 are provided in the upper and lower caps 200 and 300, respectively, but the opening can be provided only in one cap. This is the case, for example, when water with relatively little dirt is targeted and when all the introduced water is to be purified. At this time, it is possible not to form a hole in one of the caps, or it is possible to provide a cap and close one end of the case 100 in advance.

  FIG. 2 is a schematic diagram of a cross section of a fastening portion between the case and the cap of FIG. Here, the case 100 and the lower cap 200 are fastened as an example, but the case 100 and the upper cap 300 are fastened, or the cap has only one of the upper side and the lower side, or one of the caps has an opening. The same applies to the case of not.

  In the membrane module according to this embodiment, the case 100 and the lower cap 200 are fastened by a fastening band 700 as shown in FIG. The fastening band 700 is formed in an annular shape so as to surround the end portions of the case 100 and the lower cap 200, and has a pair of projecting portions (locking portions) 711 and 721 extending radially inwardly. ing. On the other hand, each end of the case 100 and the lower cap 200 connected to each other has an annular case locked portion 103 formed in a notch shape, and an annular lower cap engaged in a hook shape. Stop portions 203 are provided, and the protruding portions 711 and 721 of the tightening band 700 are locked to the case locked portion 103 and the lower cap locked portion 203, respectively. The cap 200 is fastened. This prevents the lower cap 200 from being separated from the case 100 even when a fluid is introduced into the case 100 and the lower cap 200 and an internal pressure is applied. The case locked portion 103 and the lower cap locked portion 203 correspond to the “locked portion” in the present invention.

  The tightening band 700 is provided with a band recess 763 formed from the tightening band belly surfaces 761 and 762, and the rubber-like elastic body 600 is accommodated in the band recess 763. The rubber-like elastic body 600 is formed of a first lip 601, a second lip 602, and a connecting portion 603 that connects them. More specifically, the first lip 601 extends annularly along the lower cap end surface 201 (large diameter end surface) of the lower cap 200, and the tip is coupled to the case end surface 101 (small diameter end surface) of the case 100. The case is directed to the outer peripheral surface 102. The second lip extends annularly along the case outer peripheral surface 102, and the tip is directed to the lower cap end surface 201. And the connection part 603 connects each base end part, and is extended cyclically | annularly so that each front-end | tip may not contact the 1st lip 601 and the 2nd lip 602. With the rubber-like elastic body 600 configured as described above, the first lip 601, the second lip 602, and the connecting portion 603 form an annular lip recess 604. Therefore, when a pressurized fluid flows into the lip recess 604, the first lip 601 and the second lip 602 act so as to open outward, respectively, and the lower cap end surface 201 and the case outer peripheral surface 102 are actuated. It comes to be pressed more strongly.

  Further, the band recess 763 formed from the fastening band abdomen surfaces 761 and 762 is formed so as to correspond to the surface shape formed from the rubber-like elastic body back surfaces 671 and 672 of the rubber-like elastic body 600, and is tightened. The rubber elastic body 600 is compressed when the case 100 and the lower cap 200 are fastened by the band 700. That is, when fastening by the fastening band 700 is performed, the fastening band abdomen surfaces 761 and 762 press the rubber-like elastic body rear surfaces 671 and 672, and the first lip 601 and the second lip 601 of the rubber-like elastic body 600 are pressed. The lips 602 are pressed against the lower cap end surface 201 and the case outer peripheral surface 102, respectively.

  When pressurized fluid is supplied into the case 100 and the lower cap 200 of the membrane module configured as described above, the fluid enters the lip recess 604 via the gap between the case end surface 101 and the lower cap end surface 201. The first lip 601 and the second lip 602 are pressed more strongly against the lower cap end surface 201 and the case outer peripheral surface 102 by the pressure of the fluid. With such a mechanism, liquid tightness between the case 100 and the lower cap 200 is maintained.

  As mentioned above, although one Embodiment of this invention and some modifications were demonstrated, this invention is not limited to these, A various change is possible unless it deviates from the meaning. The inner side surfaces of the pair of projecting portions 711 and 721 of the tightening band 700 are parallel in FIG. 2, but may be skewed. For example, as shown in FIG. 16, if the lower cap locked portion 203 of the lower cap 200 and the protruding portion 721 of the tightening band 700 are skewed, the tightening band 700 is tightened to Since the force which presses the rubber-like elastic body 600 to the side cap end surface 201 acts more effectively, and can improve liquid-tightness, it is preferable rather than the form of FIG.

  In FIG. 2, the rubber-like elastic body back surfaces 671 and 672 and the fastening band abdomen surfaces 761 and 762 are illustrated as having right angles, but may have any shape. FIG. 3 is a schematic diagram of a cross-sectional shape of a rubber-like elastic body. For example, as shown in FIGS. 3A to 3C, the angle formed by the rubber-like elastic body back surfaces 671 and 672 may be an obtuse angle, or as schematically shown in FIG. Further, the back surface of the rubber-like elastic body may be composed of three sides, or may be composed of a larger number of sides. Further, as schematically shown in FIGS. 3 (e) and 3 (f), it may be arcuate or elliptical arcuate. The rubber-like elastic body having the cross-sectional shapes of FIGS. 3A to 3F has a more effective force for pressing the rubber-like elastic body 600 against the lower cap end surface 201 when the fastening band 700 is tightened. Since it acts and liquid tightness can be improved, the angle formed by the back surface of the rubber-like elastic body 600 shown in FIG. When the shape of the rubber-like elastic body is the cross-sectional shape of FIGS. 3A to 3F or any other cross-sectional shape, the shape of the fastening band belly surface may be a shape corresponding to the back surface of the rubber-like elastic body. Although it is preferable, it is not limited to this as long as liquid-tight holding is possible.

FIG. 4 is a schematic cross-sectional view of an example of an embodiment of the rubber-like elastic body 600. As shown in FIG. 4A, an angle θ ₁ formed by the outer surface of the first lip 601 and the outer surface of the second lip 602 of the rubber-like elastic body 600 in an uncompressed state is the lower cap end surface 201 and the outer periphery of the case. When the angle is smaller than the angle θ ₂ formed with the surface 102, the first lip 601 and the second lip 602 of the rubber-like elastic body 600 are tightened by the tightening band 700 so that the case outer peripheral surface 102 and the lower cap end surface 201. Each is crimped to. For this reason, it is possible to maintain liquid-tightness even when the non-processing fluid is not supplied, or even when the fluid to be processed is supplied and the internal pressure is extremely low, which is more preferable. Further, as shown in FIG. 4B, the spring materials 681 and 682 are discretely embedded in the lips 601 and 602 of the rubber-like elastic body 600, so that the inside of the case 100 and the lower cap 200 is more than the outside. Even if it becomes somewhat negative pressure, it is possible to keep liquid tightness, and it is a preferable configuration when such use conditions can be taken.

  In addition, it is preferable that the case and the cap are easily manufactured when the angle formed by the end surface having the larger outer diameter and the outer peripheral surface having the smaller outer diameter is a right angle between the case and the lower cap.

  6 to 14, as in FIG. 2, the outer diameter of the end surface 201 connected to the case 100 in the lower cap 200 is larger than the outer diameter of the end surface 101 connected to the lower cap 200 in the case 100. It is the schematic diagram of the longitudinal cross-section of the fastening part of case 100 and the lower cap 200 regarding another example of embodiment of this invention in the case of big. The shape of the end portion of the case 100 and the end portion of the lower cap 200 is slightly different from the case of FIG. 2, and the form of the tightening band 700 is slightly different correspondingly, but the first provided on the rubber-like elastic body 600 is different. The lip 601 and the second lip 602 are in close contact with the lower cap end surface 201 and the case outer peripheral surface 102 to maintain the liquid tightness, and the protrusions 711 and 721 of the fastening band 700 are respectively the case. Similarly, the case 100 and the lower cap 200 are prevented from being separated by being locked to the locked portion 103 and the lower cap locked portion 203.

  FIG. 15 shows an embodiment of the present invention when the outer diameter of the end surface 201 connected to the case 100 of the lower cap 200 is smaller than the outer diameter of the end surface 101 connected to the lower cap 200 of the case 100. It is a schematic diagram of the cross section of the fastening part of case 100 and the lower side cap 200 regarding another example of these. In this case, it is the outer peripheral surface 202 coupled to the case end surface 101 and the lower cap end surface 201 that contacts the first lip 601 and the second lip 602 provided on the rubber-like elastic body 600. The liquid-tight holding mechanism is the same, and the protrusions 711 and 721 of the fastening band 700 are locked to the case locked portion 103 and the lower cap locked portion 203, respectively. The same can be said for preventing the cap 200 from coming off. Further, in this example, by sandwiching the annular spacer 800 between the case 100 and the lower cap 200, the outer peripheral portion of the opening surface of the hollow fiber membrane is blocked by the lower cap end surface 201, and the effective membrane area is lost. To prevent you from doing. The liquid tightness between the case 100 and the lower cap 200 is maintained by the contact of the case 100, the lower cap 200, and the rubber-like elastic body 600. Therefore, the spacer 800, the case 100, and the spacer 800 are maintained. And the lower cap 200 need not be liquid-tight. Rather, in order to ensure reliable communication between the case 100 and the first lip 601 and the second lip 602 inside the rubber-like elastic body 600, a part of the spacer 800 is notched or connected. It is preferable to provide a hole. Alternatively, by providing a notch on the case 100 side, communication between the inside of the case 100 and the lip recess 604 inside the first lip 601 and the second lip 602 of the rubber-like elastic body 600 may be secured. As the material of the spacer 800, stainless steel, glass fiber reinforced resin, engineering plastic, etc. having both corrosion resistance and strength are suitable.

  Since it becomes complicated, it is omitted to illustrate here, but the case in the cap even when the outer diameter of the end surface connected to the case in the cap is smaller than the outer diameter of the end surface connected to the cap in the case As in the case where the outer diameter of the end surface connected to the cap is larger than the outer diameter of the end surface connected to the cap in the case, the shape of the rubber-like elastic body back and the abdomen of the fastening band, the case end and the cap end There are many variations due to shape relationships.

  Further, the above description has been made by taking the case where the fluid separation membrane is a water purification membrane as an example, but the same applies to the case where the fluid separation membrane is another liquid separation membrane or a gas separation membrane.

  According to the fluid separation membrane module of the present invention, since the case and the cap can be liquid-tightly fastened even if the outer diameters of the case and the cap do not match, the effective membrane area of the fluid separation device is adjusted. In addition, when changing the membrane of existing equipment, the range of module selection is expanded to a brand different from the fluid separation membrane module in use, which is useful for the user of the membrane apparatus.

FIG. 3 is a schematic diagram showing the entire fluid separation membrane module of an example of an embodiment of the present invention when the outer diameter of the end face connected to the case in the cap is larger than the outer diameter of the end face connected to the cap in the case. . It is a schematic diagram of the longitudinal cross-section of the fastening part of the case and cap of FIG. It is a schematic diagram of the longitudinal cross-sectional shape of the rubber-like elastic body of the example of embodiment of this invention. It is a schematic diagram of the longitudinal cross-sectional shape of the rubber-like elastic body of the other example of embodiment of this invention. It is a schematic diagram of the plane and side surface of the fastening band of the example of the embodiment of the present invention. When the outer diameter of the end surface connected to the case in the cap is larger than the outer diameter of the end surface connected to the cap in the case, the longitudinal section of the fastening portion of the case and the cap related to another example of the embodiment of the present invention It is a schematic diagram. When the outer diameter of the end surface connected to the case in the cap is larger than the outer diameter of the end surface connected to the cap in the case, the longitudinal section of the fastening portion of the case and the cap related to another example of the embodiment of the present invention It is a schematic diagram. When the outer diameter of the end surface connected to the case in the cap is larger than the outer diameter of the end surface connected to the cap in the case, the longitudinal section of the fastening portion of the case and the cap related to another example of the embodiment of the present invention It is a schematic diagram. When the outer diameter of the end surface connected to the case in the cap is larger than the outer diameter of the end surface connected to the cap in the case, the longitudinal section of the fastening portion of the case and the cap related to another example of the embodiment of the present invention It is a schematic diagram. When the outer diameter of the end surface connected to the case in the cap is larger than the outer diameter of the end surface connected to the cap in the case, the longitudinal section of the fastening portion of the case and the cap related to another example of the embodiment of the present invention It is a schematic diagram. When the outer diameter of the end surface connected to the case in the cap is larger than the outer diameter of the end surface connected to the cap in the case, the longitudinal section of the fastening portion of the case and the cap related to another example of the embodiment of the present invention It is a schematic diagram. When the outer diameter of the end surface connected to the case in the cap is larger than the outer diameter of the end surface connected to the cap in the case, the longitudinal section of the fastening portion of the case and the cap related to another example of the embodiment of the present invention It is a schematic diagram. When the outer diameter of the end surface connected to the case in the cap is larger than the outer diameter of the end surface connected to the cap in the case, the longitudinal section of the fastening portion of the case and the cap related to another example of the embodiment of the present invention It is a schematic diagram. When the outer diameter of the end surface connected to the case in the cap is larger than the outer diameter of the end surface connected to the cap in the case, the longitudinal section of the fastening portion of the case and the cap related to another example of the embodiment of the present invention It is a schematic diagram. When the outer diameter of the end surface connected to the case in the cap is smaller than the outer diameter of the end surface connected to the cap in the case, the longitudinal section of the fastening portion of the case and the cap related to another example of the embodiment of the present invention It is a schematic diagram. When the outer diameter of the end surface connected to the case in the cap is larger than the outer diameter of the end surface connected to the cap in the case, the longitudinal section of the fastening portion of the case and the cap related to another example of the embodiment of the present invention It is a schematic diagram.

Explanation of symbols

100: Case 101: Case end surface 102: Case outer peripheral surface 103: Case engaged portion 120, 130: Case opening 200: Lower cap 201: Lower cap end surface 202: Lower cap outer peripheral surface 203: Lower cap engaged Stop portion 220: Lower cap body 230: Lower cap opening 300: Upper cap 320: Upper cap body 330: Upper cap opening 400: Hollow fiber membrane 500: Sealing resin 600: Rubber-like elastic body 601: First lip 602: second lip 603: connecting portion 604: lip recess 671, 672: rubber-like elastic body back surface 681, 682: spring material 700: tightening band 711, 721: protruding portion (locking portion)
761,762: Tightening band belly surface 763: Band recess 800: Spacer

Claims (4)

A substantially cylindrical case having at least one opening on the outer peripheral surface;
A separation membrane for fluid separation installed in the case;
A substantially circular end connected to the case, and a cap having at least one opening and connected to one or both ends of the case;
A fluid separation membrane module in which the outer diameters of the end faces in contact with each other in the case and the cap are different,
A large-diameter end surface having a larger outer diameter of the end surfaces of the case and the cap, and an outer peripheral surface coupled to a smaller-diameter end surface having a smaller outer diameter of the end surfaces of the case and the cap. An annular rubber-like elastic body in liquid-tight contact;
An annular fastening band that presses the rubber-like elastic body against the outer peripheral surface coupled to the large-diameter end surface and the small-diameter end surface;
A fluid separation membrane module comprising:   The rubber-like elastic body extends annularly along the large-diameter end face, and the first lip directed to the outer peripheral face coupled to the small-diameter end face, and extends annularly along the outer peripheral face, A second lip having a distal end directed to the large-diameter end surface, and an annular coupling portion that couples the first and second lips so that the respective distal ends do not contact each other. The fluid separation membrane module according to claim 1, comprising:   The rubber-like elastic body has an outer periphery in which an angle formed by the outer surface of the first lip and the outer surface of the second lip is coupled to the large-diameter end surface and the small-diameter end surface in a longitudinal sectional view in an uncompressed state. The fluid separation membrane module according to claim 2, wherein the fluid separation membrane module is smaller than an angle formed with the surface. The band has a locking portion for fastening the case and the cap,
The to-be-latched part for latching the said latching | locking part is provided in each edge part mutually connected in the said case and a cap, The Claim 1 to 3 characterized by the above-mentioned. Fluid separation membrane module.

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