CN214020133U

CN214020133U - Continuous production and modification device of hollow fiber membrane by thermally induced phase separation method

Info

Publication number: CN214020133U
Application number: CN202022743468.3U
Authority: CN
Inventors: 林亚凯; 汪林; 王晓琳
Original assignee: Tsinghua University
Current assignee: Tsinghua University
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2021-08-24
Anticipated expiration: 2030-11-24

Abstract

The utility model provides a continuous production and modification device of thermally induced phase separation method hollow fiber membrane, include: the hollow fiber membrane pre-processing unit comprises a hollow fiber membrane pre-processing unit, a hollow fiber membrane modifying unit, a first conveying unit and a drawing unit, wherein the first conveying unit is arranged in the hollow fiber membrane pre-processing unit and the hollow fiber membrane modifying unit; the outlet of the hollow fiber membrane preforming part outputs the hollow fiber membrane to be modified, the drawing part is connected to the end part of the hollow fiber membrane to be modified and drives the hollow fiber membrane to be modified to sequentially pass through the hollow fiber membrane pretreatment part and the hollow fiber membrane modification part along the first conveying part so as to obtain the hollow fiber membrane. The device can realize the continuity of the production process and the modification process of the hollow fiber membrane and the continuity between the production and the modification, shorten the production and the modification period of the hollow fiber membrane and improve the performance of the finally obtained modified hollow fiber membrane.

Description

Continuous production and modification device of hollow fiber membrane by thermally induced phase separation method

Technical Field

The utility model relates to a continuous production and modification device of thermally induced phase separation method hollow fiber membrane belongs to hollow fiber membrane production field.

Background

The hollow fiber membrane has the advantages of self-supporting property, high filling density, strong pollution resistance, high recovery rate, low replacement cost and the like, and is one of the most widely applied forms of the separation membrane at present. The membrane component prepared by the hollow fiber membrane can be widely applied to the aspects of sewage treatment, water purification, material separation, concentration, recovery and the like in the fields of environmental protection, food industry, medical treatment, electronic industry and the like. Currently, the preparation methods of hollow fiber membranes mainly include a Non-solvent induced phase separation (NIPS), a Thermal Induced Phase Separation (TIPS), and a Melt spinning-drawing (MSCS) method. The hollow fiber membrane prepared by the TIPS method has the advantages of high controllability, high membrane forming stability, high structural regularity, high mechanical strength of the membrane and the like, so that the hollow fiber membrane has wide market application prospect. However, the hollow fiber membrane prepared by the TIPS method is generally strong in hydrophobicity and is prone to generate adsorption pollution in the use process, thereby causing performance attenuation. The membranes are frequently cleaned to ensure the normal operation of the hollow fiber membranes, so that the operation cost is increased, the operation efficiency is reduced, and even the service life of the hollow fiber membranes is shortened. Therefore, the hollow fiber membrane prepared by the TIPS method needs to be subjected to hydrophilic modification to improve the hydrophilicity and the pollution resistance, so that the prospect of the hollow fiber membrane in practical application is further improved.

The existing TIPS hollow fiber membrane preparation process is difficult to add hydrophilic substances into a production formula to perform hydrophilic modification on a hollow fiber membrane, and is usually performed by adopting a mode of performing post-treatment on a nascent hollow fiber membrane. The mode of carrying out post-treatment on the nascent hollow fiber membrane is that the nascent membrane filaments are taken down from the filament collecting roller, placed in an extraction tank for soaking and extraction, and then the membrane filaments are carried out subsequent hydrophilic modification treatment. In the process, the membrane yarn is easy to be wound and broken, and the waste is caused. In addition, the production process of the membrane yarn is discontinuous, the hydrophilic modification process of the membrane yarn is discontinuous, and the production cycle of the hydrophilic modified hollow fiber membrane is prolonged due to the discontinuity between the production and modification of the membrane yarn, so that the uncontrollable factors in the production process of the hydrophilic modified hollow fiber membrane are increased, and the unstable risk of the performance of the hydrophilic modified hollow fiber membrane is increased.

SUMMERY OF THE UTILITY MODEL

The utility model provides a continuous production and modification device of thermally induced phase separation method hollow fiber membrane, the device can realize hollow fiber membrane production process serialization, modification process serialization and production and the serialization between the modification to avoid because production and modification process discontinuous influence to hollow fiber membrane performance, reduce the cycle of production and modified hollow fiber membrane, realize the improvement of the modified hollow fiber membrane stability ability of producing.

The utility model provides a continuous production and modification device of thermally induced phase separation method hollow fiber membrane, include: the device comprises a hollow fiber membrane preforming part, a hollow fiber membrane pretreatment part, a hollow fiber membrane modification part, a first conveying part and a drawing part, wherein the first conveying part is arranged in the hollow fiber membrane pretreatment part and the hollow fiber membrane modification part;

the hollow fiber membrane pre-forming device comprises a hollow fiber membrane pre-forming part, a drawing part, a first conveying part and a second conveying part, wherein an outlet of the hollow fiber membrane pre-forming part outputs a hollow fiber membrane to be modified, the drawing part is connected to the end part of the hollow fiber membrane to be modified and drives the hollow fiber membrane to be modified to sequentially pass through the hollow fiber membrane pre-processing part and the hollow fiber membrane modifying part along the first conveying part so as to obtain the hollow fiber membrane.

The continuous production and modification device comprises a drawing part, wherein the drawing part comprises a drawing roller, the end part of the hollow fiber membrane to be modified is fixed on the drawing roller, and the drawing roller rotates to drive the hollow fiber membrane to be modified to sequentially pass through the hollow fiber membrane pretreatment part and the hollow fiber membrane modification part along the first conveying part so as to obtain the hollow fiber membrane.

The continuous production and modification apparatus as described above, wherein the continuous production and modification apparatus further comprises a first drying section and a second drying section, the first drying section being located between the hollow fiber membrane pretreatment section and the hollow fiber membrane modification section;

the second drying section is located between the hollow fiber membrane modification section and the drawing section;

the drawing part drives the hollow fiber membrane to be modified to sequentially pass through the hollow fiber membrane pretreatment part, the first drying part, the hollow fiber membrane modification part and the second drying part along the first conveying part so as to obtain the hollow fiber membrane.

The continuous production and modification apparatus as described above, wherein the continuous production and modification apparatus further comprises a heat-treatment stretching section located between the first drying section and the hollow fiber film modification section;

the drawing part drives the hollow fiber membrane to be modified to sequentially pass through the hollow fiber membrane pretreatment part, the first drying part, the heat treatment stretching part, the hollow fiber membrane modification part and the second drying part along the first conveying part so as to obtain the hollow fiber membrane.

The continuous production and modification apparatus as described above, wherein the hollow fiber membrane pretreatment section comprises a cooling tank and an extraction tank in this order;

the first conveying part comprises a first conveying piece and a second conveying piece, wherein the first conveying piece is arranged in the cooling tank and is positioned below the liquid level of the cooling liquid in the cooling tank; the second conveying member is arranged in the extraction tank and is positioned below the liquid level of the extraction liquid in the extraction tank.

The continuous production and modification apparatus as described above, wherein the hollow fiber membrane modification section comprises an ultraviolet ozone processor and a modification tank in this order;

the first conveying part further comprises a third conveying member and a fourth conveying member, wherein the third conveying member is arranged inside the ultraviolet ozone processor; the fourth conveying member is arranged in the modification tank and is positioned below the liquid level of the modification liquid in the modification tank.

The continuous production and modification apparatus as described above, wherein the continuous production and modification apparatus further comprises a second conveyor;

the second conveying part comprises a fifth conveying element, and/or a sixth conveying element, and/or a seventh conveying element, and/or an eighth conveying element; the fifth conveying member is arranged between the cooling tank and the extraction tank; the sixth conveying member is arranged between the first drying part and the heat treatment stretching part; the seventh conveying member is arranged between the heat treatment stretching part and the ultraviolet ozone processor; the eighth transfer member is disposed between the second drying part and the drawing part.

The drawing part drives the hollow fiber membrane to be modified to sequentially pass through the hollow fiber membrane pretreatment part, the first drying part, the heat treatment stretching part, the hollow fiber membrane modification part and the second drying part along the first conveying part and the second conveying part so as to obtain the hollow fiber membrane.

The continuous production and modification device as described above, wherein at least one of the first conveying member, the second conveying member, the third conveying member, the fourth conveying member, the fifth conveying member, the sixth conveying member, the seventh conveying member and the eighth conveying member is N godet rollers, N is greater than or equal to 1;

the hollow fiber membrane to be modified is movably wrapped on part of the peripheral surface of the godet roller, and the godet roller rotates to convey the hollow fiber membrane to be modified.

The continuous production and modification device is characterized in that a controller and a tension sensor are arranged in the godet roller and the drawing roller, and the controller is electrically connected with the sensor.

The continuous production and modification device further comprises a hollow fiber membrane post-treatment part, wherein two ends of the pulling roller are rotatably connected with the hollow fiber membrane post-treatment part, and at least part of the pulling roller is positioned below the liquid level of the protective liquid in the hollow fiber membrane post-treatment part.

The utility model discloses an implementation contains following advantage at least:

1. the utility model discloses a continuous production and modified device of hollow fiber membrane can realize that hollow fiber membrane goes on from the raw materials to the serialization of final modified product, improves hollow fiber membrane production and modified efficiency, shortens hollow fiber membrane production and modified production cycle.

2. The utility model discloses a continuous production and modified device of hollow fiber membrane avoids production and modified in-process to need artifical fibre membrane silk winding, disconnected silk etc. that comes such as receiving silk, transport from receiving the silk roller many times, not only is favorable to controlling the length and the length regularity of the finally modified hollow fiber membrane that obtains, has promoted the yield of hollow fiber membrane especially, has reduced the waste in the formation process.

3. The utility model discloses a continuous production and modification device of hollow fiber membrane, production and the accurate controllable of modification process can reduce the uncontrollable factor in hollow fiber membrane production and the modification process, are favorable to improving the modified hollow fiber membrane's that finally obtains performance to and realize the improvement of hollow fiber membrane stability ability.

4. The utility model discloses a continuous production and modification device of hollow fiber membrane, convenient to use, easy operation is favorable to extensive popularization.

Drawings

FIG. 1 is a schematic structural diagram of a first embodiment of the apparatus for continuously producing and modifying a hollow fiber membrane according to the thermal-induced phase separation method of the present invention;

FIG. 2 is a schematic structural diagram of a second embodiment of the apparatus for continuously producing and modifying a hollow fiber membrane according to the thermal phase separation method of the present invention;

FIG. 3 is a schematic structural diagram of a third embodiment of the apparatus for continuously producing and modifying a hollow fiber membrane according to the thermal phase separation method of the present invention;

FIG. 4 is a schematic structural diagram of a fourth embodiment of the apparatus for continuously producing and modifying a hollow fiber membrane according to the thermal-induced phase separation method of the present invention;

fig. 5 is a schematic structural diagram of a fifth embodiment of the continuous production and modification apparatus for a hollow fiber membrane by a thermally induced phase separation method according to the present invention.

Detailed Description

To make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention are combined to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Fig. 1 is a schematic structural diagram of a first embodiment of the continuous production and modification apparatus for a hollow fiber membrane by a thermally induced phase separation method according to the present invention, referring to fig. 1, the present embodiment provides a continuous production and modification apparatus for a hollow fiber membrane by a thermally induced phase separation method, including: the device comprises a hollow fiber membrane preforming part A, a hollow fiber membrane pretreatment part B, a hollow fiber membrane modification part C, a first conveying part D and a drawing part E, wherein the first conveying part D is arranged in the hollow fiber membrane pretreatment part B and the hollow fiber membrane modification part C;

the outlet of the hollow fiber membrane preforming part A outputs the hollow fiber membrane to be modified, the drawing part E is connected to the end part of the hollow fiber membrane to be modified and drives the hollow fiber membrane to be modified to sequentially pass through the hollow fiber membrane pretreatment part B and the hollow fiber membrane modification part C along the first conveying part D so as to obtain the hollow fiber membrane.

In the continuous production and modification apparatus for a hollow fiber membrane by a thermal phase separation method according to the first embodiment, the hollow fiber membrane preform a is used to process raw materials for producing the hollow fiber membrane into a hollow fiber membrane to be modified. The utility model discloses do not restrict the concrete constitution of hollow fiber membrane preforming portion A, as long as can realize the raw materials to the production of treating modified hollow fiber membrane. For example, the hollow fiber membrane preform section a in the first embodiment may be composed of a raw material mixing unit 1, a metering unit 2, a screw extruder 3, a temperature programming unit 4, a core liquid storage and feeding unit 5, and a spinning unit 6.

The raw material mixing unit 1 of the first embodiment has a feeding port (not shown) and a discharging port (not shown) and is provided with a mixing and stirring assembly (not shown). The discharge port of the raw material mixing unit 1 is communicated with the inlet (not shown) of the metering and adding unit 2; and a precise metering assembly (not shown) and a conveying assembly (not shown) are arranged in the metering and adding unit 2, materials entering an inlet are precisely metered according to production and modification process requirements, and the conveying amount of the materials reaching an outlet of the metering and adding unit 2 is controlled by the conveying assembly. The outlet (not shown) of the metering and adding unit 2 is communicated with the inlet (not shown) of the screw extruder 3, the program temperature control unit 4 is electrically connected with the screw extruder 3 to accurately control the temperature of the screw extruder 3 in a segmented manner, and the material is heated in the screw extruder 3 in a segmented manner and is conveyed to the outlet of the screw extruder 3.

In this embodiment the spinning unit 6 has two inlets (not shown), one of which is in communication with the outlet (not shown) of the screw extruder 3 and the other of which is in communication with the outlet (not shown) of the core liquid storage and feed unit 5. The core liquid required for producing the hollow fiber membrane enters the core liquid storage and feeding unit 5 from an inlet (not shown) of the core liquid storage and feeding unit 5 and is stored in the core liquid storage and feeding unit, then enters the spinning unit 6 from an outlet of the core liquid storage and feeding unit 5, is mixed with the material from an outlet of the screw extruder 3 in the spinning unit 6, and outputs the hollow fiber membrane to be modified at an outlet of the spinning unit 6, so that the conversion from the raw material to the hollow fiber membrane to be modified in the hollow fiber membrane preforming part A is continuously carried out, and the hollow fiber membrane to be modified output from the outlet of the spinning unit 6 enters the hollow fiber membrane pretreatment part B for subsequent treatment. It can be understood that the spinning unit 6 has at least one spinneret, which ejects the hollow-fibre membrane to be modified.

In the apparatus for modifying and producing hollow fibers according to the first embodiment, the hollow fiber membrane pretreatment unit B is configured to pretreat the hollow fiber membrane to be modified from the outlet of the hollow fiber membrane preforming unit a, and the pretreatment of the hollow fiber membrane to be modified includes sequentially performing cooling treatment and extraction treatment on the hollow fiber membrane to be modified from the hollow fiber membrane preforming unit a by using the cooling liquid and the extraction liquid, respectively. After the hollow fiber membrane to be modified is contacted with the cooling liquid, the hollow fiber membrane to be modified is cooled and solidified and simultaneously undergoes solid-liquid phase separation (namely, thermally induced phase separation) under the driving of temperature change, so that the hollow fiber membrane to be modified with the microporous structure is obtained. The extraction liquid is generally an organic solvent, and after the hollow fiber membrane to be modified is contacted with the extraction liquid, the extraction liquid can extract the diluent carried in the hollow fiber membrane to be modified and realize the separation of the diluent and the hollow fiber membrane to be modified.

In the continuous production and modification apparatus for a hollow fiber membrane by a thermal phase separation method according to the first embodiment, the hollow fiber membrane modification unit C is configured to modify a hollow fiber membrane to be modified from an outlet of the hollow fiber membrane pretreatment unit B. The utility model discloses do not restrict the concrete constitution of hollow fiber membrane modified portion C, as long as can accomplish the modification to hollow fiber membrane according to the modified demand can. For example, the hollow fiber membrane is hydrophilically modified, the hollow fiber membrane modification part C may contain a modification liquid, the hollow fiber membrane to be modified enters the hollow fiber membrane modification part C under the drawing of the drawing part E and the conveying of the first conveying part D arranged in the hollow fiber membrane modification part C and passes through the modification liquid, and the modification liquid can reconstruct the surface functional group of the hollow fiber membrane to be modified and improve the hydrophilicity of the hollow fiber membrane to be modified, so that the hydrophilization modification of the hollow fiber membrane to be modified is completed, and the hydrophilically modified hollow fiber membrane is obtained.

The drawing section E in this embodiment is provided after the hollow fiber membrane preform section a, the hollow fiber membrane pretreatment section B, the hollow fiber membrane reforming section C, and the first conveying section D, and more specifically, the first conveying section D is provided inside the hollow fiber membrane pretreatment section B and the hollow fiber membrane reforming section C, and the hollow fiber membrane preform section a, the hollow fiber membrane pretreatment section B, the hollow fiber membrane reforming section C, and the drawing section E are arranged in this order in the traveling direction of the hollow fiber membrane to be reformed. The drawing part E fixes one end of the hollow fiber membrane to be modified, so that under the drawing of the drawing part E, the hollow fiber membrane to be modified sequentially passes through the hollow fiber membrane pre-processing part B and the hollow fiber membrane modifying part C under the guiding and conveying of the first conveying part D, the pre-processing and modifying treatment of the hollow fiber membrane to be modified output by the hollow fiber membrane pre-forming part A are completed, and the hollow fiber membrane is obtained.

Specifically, after the fiber preforming of the raw material for producing the hollow fiber membrane is completed in the hollow fiber membrane preforming part A, the hollow fiber membrane to be modified is output at the outlet of the hollow fiber membrane preforming part A, the end part of the hollow fiber membrane to be modified is connected to the drawing part E, under the drawing of the drawing part E and the conduction of the first conveying part D arranged in the hollow fiber membrane pretreatment part B, the hollow fiber membrane pretreatment part B is entered through the inlet of the hollow fiber membrane pretreatment part B, the pretreatment process is completed in the hollow fiber membrane pretreatment part B, then the hollow fiber membrane pretreatment part B is drawn to the outlet of the hollow fiber membrane pretreatment part B, under the drawing of the drawing part E and the conduction of the first conveying part D arranged in the hollow fiber membrane modification part C, the hollow fiber membrane modification part C is entered through the inlet of the hollow fiber membrane modification part C, and the modification process is completed in the hollow fiber membrane modification part C, is drawn out at the outlet of the hollow fiber membrane reforming section C, and finally the finally reformed hollow fiber membrane is obtained in the drawing section E.

The first conveying part D of the present embodiment is disposed inside the hollow fiber membrane pretreatment part B and inside the hollow fiber membrane modification part C, and completes the conduction of the hollow fiber membrane in the production and modification apparatus in cooperation with the drawing of the drawing part E. The hollow fiber membrane pretreatment part B and the hollow fiber membrane modification part C are internally provided with the first conveying part D, so that the hollow fiber membrane to be modified is movably connected with the first conveying part D, and the hollow fiber membrane to be modified can sequentially enter the hollow fiber membrane pretreatment part B and the hollow fiber membrane modification part C under the driving of the drawing part E, and the production modification of the whole hollow fiber membrane can be continuously completed. In the first embodiment, the conversion process of the raw material into the hollow fiber membrane to be modified in the hollow fiber membrane preforming section a, the conversion process of the hollow fiber membrane to be modified between the hollow fiber membrane preforming section a and the hollow fiber membrane pre-treatment section B, the conversion process of the hollow fiber membrane to be modified in the hollow fiber membrane modification section C, and the conversion process of the hollow fiber membrane from the raw material to the final modified product can be realized. The continuous production and modification device of the hollow fiber membrane by the thermally induced phase separation method in the first embodiment has the advantages of continuous flow and simple operation, greatly shortens the production and modification period of the hollow fiber membrane, improves the production and modification efficiency of the hollow fiber membrane, avoids the breakage and winding caused by repeated filament collection and carrying in the production and modification processes, reduces the waste in the production and modification processes, is favorable for improving the performance of the finally obtained modified hollow fiber membrane, and realizes the stability of the performance of the hollow fiber membrane.

In some embodiments of the present invention, the drawing part may be a drawing roller, the end of the hollow fiber membrane to be modified is fixed on the drawing roller, and the drawing roller rotates to drive the hollow fiber membrane to be modified to pass through the hollow fiber membrane pretreatment part B and the hollow fiber membrane modification part C in sequence along the first transmission part D to obtain the hollow fiber membrane.

The hollow fiber membrane to be modified is drawn from the outlet of the hollow fiber membrane preforming part A, passes through the hollow fiber membrane pre-processing part B and the hollow fiber membrane modifying part C in sequence under the transmission of the first transmission part D to complete the hollow fiber membrane pre-processing and modification, is finally wound on the drawing roller, and is subjected to primary filament winding on the drawing roller to obtain the finally modified hollow fiber membrane.

FIG. 2 is a schematic structural diagram of a second embodiment of the apparatus for continuously producing and modifying a hollow fiber membrane according to the thermal phase separation method of the present invention; referring to fig. 2, in addition to the first embodiment, the second embodiment further includes a first drying section F and a second drying section G, the first drying section F is located between the hollow fiber membrane pretreatment section B and the hollow fiber membrane modification section C;

the second drying section G is located between the hollow fiber membrane modification section C and the drawing section E;

the drawing part E drives the hollow fiber membrane to be modified to sequentially pass through a hollow fiber membrane pretreatment part B, a first drying part F, a hollow fiber membrane modification part C and a second drying part G along a first conveying part D so as to obtain the hollow fiber membrane.

In the second embodiment, the first drying section F is used for drying the hollow fiber membrane to be modified from the hollow fiber membrane pretreatment section B, and the second drying section G is used for drying the hollow fiber membrane to be modified from the hollow fiber membrane modification section C.

The utility model discloses do not restrict the concrete constitution of first drying portion F and second drying portion G, for example, first drying portion F and second drying portion G can be the drying cabinet that can regulate and control the temperature.

In the specific implementation process, the hollow fiber membrane to be modified is pulled by the pulling part E and output from the outlet of the hollow fiber membrane pretreatment part B, enters the first drying part F through the inlet of the first drying part F, is dried in the first drying part F and is pulled and output from the outlet of the first drying part F, then enters the hollow fiber membrane modification part C through the inlet of the hollow fiber membrane modification part C under the conveying of the first conveying part D, the hollow fiber membrane to be modified is modified in the hollow fiber membrane modification part C, is pulled and output from the outlet of the hollow fiber membrane modification part C, then enters the second drying part G from the inlet of the second drying part G, is dried in the second drying part G, and is output from the outlet of the second drying part G, and finally the hollow fiber membrane to be modified is obtained on the pulling part E.

It can be understood that, in the specific implementation process, the drying effect of the hollow fiber membrane to be modified can be controlled by controlling the temperature of the first drying part F and the second drying part G, and the drying effect of the hollow fiber membrane to be modified can also be controlled by controlling the time for which the hollow fiber membrane to be modified passes through the first drying part F and the second drying part G by controlling the drawing speed of the drawing part E.

Fig. 3 is a schematic structural view of a third embodiment of the apparatus for continuously producing and modifying a hollow fiber membrane according to the thermal phase separation method of the present invention, as shown in fig. 3, the apparatus for continuously producing and modifying a hollow fiber membrane according to the present invention further comprises a heat treatment stretching portion H, the heat treatment stretching portion H being located between the first drying portion F and the hollow fiber membrane modification portion C;

the drawing part E drives the hollow fiber membrane to be modified to sequentially pass through a hollow fiber membrane pretreatment part B, a first drying part F, a heat treatment stretching part H, a hollow fiber membrane modification part C and a second drying part G along a first conveying part D so as to obtain the hollow fiber membrane.

The heat treatment stretching section H in the present embodiment is used to heat-treat and stretch the hollow fiber membrane to be modified from the first drying section F, so that the mechanical properties of the hollow fiber membrane to be modified from the first drying section F are improved. In a specific operation process, the heat-treatment stretching part H may include a temperature control unit (not shown) and stretching rollers (not shown), and the heat treatment and stretching effect of the hollow fiber membrane to be modified may be controlled by controlling the temperature at which the hollow fiber membrane to be modified is subjected to heat treatment and stretching and the distance between the stretching rollers, so that the hollow fiber membrane to be modified entering the hollow fiber membrane modification part C has more excellent mechanical properties.

Specifically, the hollow fiber membrane to be modified from the first drying section F enters the heat-treatment stretching section H from the inlet of the heat-treatment stretching section H under the drawing of the drawing section E, is discharged from the outlet of the heat-treatment stretching section H through drawing after the heat treatment and the drawing are completed in the heat-treatment stretching section H, and is subsequently modified in the hollow fiber membrane modification section C under the drawing of the drawing section E and the conveyance of the first conveyance section D.

In some embodiments of the present invention, the hollow fiber membrane pretreatment unit B includes a cooling tank B1 and an extraction tank B2 in this order;

the first conveying part D comprises a first conveying piece D1 and a second conveying piece D2, wherein the first conveying piece D1 is arranged inside the cooling tank B1 and is positioned below the liquid level of the cooling liquid in the cooling tank B1; the second transfer member D2 is disposed inside the extraction tank B2 and below the liquid level of the extraction liquid in the extraction tank B2.

It can be understood that the cooling tank B1 is used to cool the hollow fiber membrane to be modified from the hollow fiber membrane preform part a. The hollow fiber membrane to be modified output from the outlet of the hollow fiber membrane preform section a enters the cooling tank B1 from the inlet of the cooling tank B1 under the drawing of the drawing section E and the conveyance of the first conveyance member D1 and is cooled by the cooling liquid, and then is output from the outlet of the cooling tank B1 under the drawing, and is subjected to the subsequent extraction under the drawing of the drawing section E and the conveyance of the second conveyance section D2.

The extraction tank B2 is used for extracting the hollow fiber membrane to be modified from the cooling tank B1 to remove the diluent in the hollow fiber membrane to be modified. After reaching the outlet of the cooling tank B1, the hollow fiber membrane to be modified is drawn in a drawing part E and conveyed by a second conveying member D2 to enter the extraction tank B2 through the inlet of the extraction tank B2, extraction is completed under the action of extraction liquid, and then the hollow fiber membrane is drawn and output from the outlet of the extraction tank B2 and the subsequent processes are continued under the drawing of the drawing part E.

In the specific implementation process, the temperature of the cooling liquid in the cooling tank B1 can be adjusted according to different production requirements and production conditions, so that the phase separation rate of the hollow fiber membrane to be modified is changed by changing the cooling rate of the hollow fiber membrane to be modified, the extraction effect of the hollow fiber membrane to be modified can be optimized by controlling the temperature of the extraction liquid, and the production and modification requirements of different hollow fiber membranes are met. In addition, the time for cooling and extracting the hollow fiber membranes to be modified can be controlled by adjusting the interval and the number of the first conveyers D1 in the cooling tank B1, the interval and the number of the second conveyers D2 in the extraction tank B2, and the drawing speed of the drawing part E, and the whole production modification process can be considered in the concrete implementation process to obtain the hollow fiber membranes with excellent performance.

In some embodiments of the present invention, the hollow fiber membrane modification part C sequentially comprises an ultraviolet ozone processor C1 and a modification tank C2;

the first transfer part D further includes a third transfer member D3 and a fourth transfer member D4, wherein the third transfer member D3 is disposed inside the ultraviolet ozone processor C1; the fourth transfer member D4 is disposed inside the modifying bath C2 and below the modifying solution in the modifying bath C2.

The ultraviolet ozone processor C1 is used for carrying out surface activation on the hollow fiber membrane to be modified from the heat treatment stretching part H, specifically, the hollow fiber membrane to be modified enters the ultraviolet ozone processor C1 from the inlet of the ultraviolet ozone processor C1 under the drawing of the drawing part E and the conveying of the third conveying member D3, completes the surface activation under the action of ultraviolet rays and ozone, is then output by being drawn through the outlet of the ultraviolet ozone processor C1, and carries out subsequent surface modification under the drawing of the drawing part E and the conveying of the fourth conveying member D4. It can be understood that the hollow fiber membrane to be modified, which is subjected to surface activation, can have a better modification effect when modified in the subsequent modification tank C2.

The modifying tank C2 is used for carrying out surface modification on the hollow fiber membrane to be modified from the ultraviolet ozone processor C1, specifically, under the pulling of the drawing part E and the conveying of the fourth conveying member D4, the hollow fiber membrane to be modified enters the modifying tank C2 from the inlet of the modifying tank C2 and completes the surface modification under the action of the modifying liquid, and then the hollow fiber membrane which is finished the modification is obtained by drawing the output of the modifying tank C2.

In the specific implementation process, the effects of surface activation and surface modification of the hollow fiber membrane to be modified can be optimized by controlling the ultraviolet intensity and the ozone concentration of the ultraviolet ozone processor C1 and the temperature of the modification liquid in the modification tank C2, so that the production and modification requirements of different hollow fiber membranes are met. In addition, by adjusting the interval and the number of the third conveyors D3 in the ultraviolet ozone processor C1 and the interval and the number of the fourth conveyors D4 in the modification tank C2, the time for surface activation and surface modification of the hollow fiber membranes to be modified can be controlled, and the whole production modification process can be considered in the specific implementation process to obtain the hollow fiber membranes with excellent performance.

Fig. 4 is a schematic structural view of a continuous production and modification apparatus for a thermally induced phase separation method hollow fiber membrane according to a fourth embodiment of the present invention, as shown in fig. 4, the continuous production and modification apparatus for a thermally induced phase separation method hollow fiber membrane according to the present invention further includes a second transfer portion J;

the second transfer section J comprises a fifth transfer member J5, and/or a sixth transfer member J6, and/or a seventh transfer member J7, and/or an eighth transfer member J8; the fifth transfer J5 is disposed between the cooling bath B1 and the extraction bath B2; a sixth transfer member J6 is disposed between the first drying section F and the heat-treated stretching section H; a seventh conveyor J7 is disposed between the heat treatment stretching section H and the uv ozone processor C1; the eighth transfer member J8 is disposed between the second drying part G and the drawing part E.

The drawing part E drives the hollow fiber membrane to be modified to sequentially pass through a hollow fiber membrane pretreatment part A, a first drying part F, a heat treatment stretching part H, a hollow fiber membrane modification part C and a second drying part G along a first conveying part D and a second conveying part J so as to obtain the hollow fiber membrane.

In the present embodiment, the second conveying section J is used to complete the conveyance of the hollow fiber membranes to be modified between the cooling tank B1 and the extraction tank B2, between the first drying section F and the heat-treatment stretching section H, between the heat-treatment stretching section H and the ultraviolet ozone treater C1, and between the second drying section G and the drawing section E. The second conveying part J is provided between the production and modification apparatuses, and can make the conduction of the hollow fiber membranes between the apparatuses smoother.

In this embodiment, the hollow fiber membrane to be modified is discharged from the outlet of the hollow fiber membrane preform section a, the end portion thereof is connected to the drawing section E, under the drawing of the drawing section E and the transfer of the first transfer member D1, the hollow fiber membrane to be modified is introduced into the cooling tank B1 and is completely cooled, is then discharged from the outlet of the cooling tank B1 by drawing, is then introduced into the extraction tank B2 through the inlet of the extraction tank B2 by the transfer of the drawing and fifth transfer member J5 and the second transfer member D2 and is discharged from the outlet of the extraction tank B2 after the extraction is completed, is introduced into the first drying section F through the inlet of the first drying section F, is completely dried in the first drying section F and is drawn to the outlet of the first drying section F, is then introduced into the heat-treatment drawing section H through the inlet of the heat-treatment drawing section H through the drawing and sixth transfer member J6, is drawn to the outlet of the heat-treatment drawing section H after the heat treatment and the drawing are completed, under the continuous drawing and the conveying of the seventh conveying member J7 and the third conveying member D3, the hollow fiber membrane to be modified, which enters the ultraviolet ozone processor C1 through the inlet of the ultraviolet ozone processor C1, completes surface activation, is drawn to the outlet of the ultraviolet ozone processor C1, the hollow fiber membrane to be modified, which is output from the outlet of the ultraviolet ozone processor C1, enters the modification tank C2 through the inlet of the modification tank C2 through the conduction of the drawing and the fourth conveying member D4, completes modification, is drawn to the outlet of the modification tank C2, is output from the outlet of the modification tank C2, is continuously drawn to the second drying part G through the inlet of the second drying part G, is conveyed through the eighth conveying member J8 after the drying in the second drying part G is completed, finally reaches the drawing part E, and finally modified fibers are obtained in the drawing part E.

In the specific implementation process, at least one of the first conveying member, the second conveying member, the third conveying member, the fourth conveying member, the fifth conveying member, the sixth conveying member, the seventh conveying member and the eighth conveying member is N godet rollers, wherein N is more than or equal to 1;

The godet roller conveys the hollow fiber membrane, the control of the transmission direction of the hollow fiber membrane can be realized by controlling the installation position of the godet roller, and the godet roller can be adjusted according to the placement position of a device used in production and modification in the specific implementation process, so that the effective utilization of the production space is realized.

It can be appreciated that the godet and draw rolls can be controlled in order to achieve even further precise control of the hollow fiber membrane production and modification process, and to enhance the performance of the final modified hollow fiber membrane. Specifically, a controller (not shown) and a tension sensor (not shown) may be provided inside the godet roller and the pulling roller, and the controller and the sensor are electrically connected. The tension sensor can sense the tension of the hollow fiber membrane to be modified passing through the godet roller and the traction roller, and the rotating speed of the godet roller and the traction roller is adjusted through the controller, so that the tension of the hollow fiber membrane to be modified is uniform, the breakage and uneven fiber thickness of the hollow fiber membrane to be modified in the production and modification processes are reduced, the performance of the finally modified hollow fiber membrane is improved, and the uniformity of the performance of the hollow fiber membrane is finally modified.

FIG. 5 is a schematic structural diagram of a fifth embodiment of the apparatus for continuously producing and modifying a hollow fiber membrane according to the thermal phase separation method of the present invention; referring to fig. 5, on the basis of the fourth embodiment, the apparatus for continuously producing and modifying a hollow fiber membrane by a thermal phase separation method in the fifth embodiment further includes a hollow fiber membrane post-treatment section K, wherein two ends of the pulling roller are rotatably connected to the hollow fiber membrane post-treatment section K, and at least a part of the pulling roller is located below the liquid level of the protective solution in the hollow fiber membrane post-treatment section K.

Specifically, the hollow fiber membrane post-treatment section K in the fifth embodiment is used for post-treating the fibers from the eighth conveyor J8, the hollow fiber membrane post-treatment section K contains the protective solution, and the drawing roller is partially located below the liquid level of the protective solution in the hollow fiber membrane post-treatment section K, and under the drawing of the drawing roller, the hollow fiber membrane is contacted with the protective solution, the coating of the protective solution is completed, the hollow fiber membrane is wound on the drawing roller, and the filament is collected on the drawing roller, so that the final modified hollow fiber membrane can be obtained.

Finally, the continuous production and modification apparatus of the hollow fiber membrane by the thermal phase separation method in the fifth embodiment will be described as an example of its specific application.

In the continuous production and modification device of hollow fiber membrane by thermal phase separation method in the fifth embodiment, the polymer raw material and diluent required for producing the hollow fiber membrane enter the production and modification device through the feed inlet of the raw material mixing unit 1, the polymer raw material and the diluent are fully mixed to form a mixture, then the mixture enters the metering and adding unit 2 through the discharge port of the raw material mixing unit 1 and the inlet of the metering and adding unit 2, the mixture is precisely output through the outlet of the metering and adding unit 2, the mixture enters the screw extruder 3 from the inlet communicated with the outlet of the metering and adding unit 2 of the screw extruder 3, the mixture is heated in the screw extruder 3 to form a homogeneous high-temperature solution, the homogeneous high-temperature solution is conveyed to the outlet of the screw extruder 3, the homogeneous high-temperature solution enters the spinning unit 6 through the inlet communicated with the outlet of the screw extruder 3 in the spinning unit 6, and the core liquid entering through the inlet communicated with the outlet of the core liquid storage and feeding unit 5 in the spinning unit 6 are together in the spinning nozzle of the spinning unit 6 And extruding to obtain the hollow fiber membrane to be modified. One end of the hollow fiber membrane to be modified is connected with a drawing roller, under the drawing of the drawing roller and the conveying of a first conveying member D1, the modified fiber membrane enters a cooling tank B1, is cooled, is drawn and then is output from an outlet of a cooling tank B1, after being conveyed by a fifth conveying member J5 and a second conveying member D2, enters an extraction tank B2 from an inlet of an extraction tank B2, is extracted, is drawn and is output from an outlet of an extraction tank B2, the hollow fiber membrane to be modified continues to be drawn and enters a first drying part F through an inlet of the first drying part F to be dried, is drawn at an outlet of the first drying part F and enters a heat treatment stretching part H from an inlet of the heat treatment stretching part H through a sixth conveying member J6, after the heat treatment and the stretching are drawn and output from an outlet of the heat treatment stretching part H, is drawn, is conveyed by a seventh conveying member J7 and a third conveying member D3, enters an ozone treater C1 through an inlet of an ultraviolet treater C1, and after the ozone is subjected to the surface activation and is drawn and subjected to ultraviolet ozone activation The outlet of the oxygen processor C1, then enters the modifying groove C2 through the inlet of the modifying groove C2 under the action of drawing and the conveying of the fourth conveying member D4, is drawn to the outlet of the modifying groove C2 after the surface modification is completed, enters the second drying part G through the inlet of the second drying part G under the action of drawing after being output from the outlet of the modifying groove C2, is drawn to the outlet of the second drying part G after the drying is completed in the second drying part G and is conveyed to the hollow fiber membrane post-processing part K through the eighth conveying member J8, is contacted with the protective liquid in the hollow fiber membrane post-processing part K to complete the coating of the protective liquid, and finally the final modified hollow fiber membrane is obtained on a drawing roller.

The utility model discloses continuous production and modification device of thermally induced phase separation method hollow fiber membrane, can realize hollow fiber membrane production process serialization, modification process serialization, production and modified process serialization, can greatly shorten hollow fiber membrane production and modified cycle, improve the modified efficiency of hollow fiber membrane production, avoid receiving silk and transport many times in production and modification process, be favorable to improving the length and the length regularity of modified hollow fiber membrane, and production and modification process are accurate controllable, be favorable to improving the performance of the modified hollow fiber membrane that finally obtains, and realize the stability of hollow fiber performance membrane, and convenient to use, and easy operation, and is favorable to popularizing on a large scale

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A continuous production and modification device of a hollow fiber membrane by a thermally induced phase separation method is characterized by comprising the following steps: the device comprises a hollow fiber membrane preforming part, a hollow fiber membrane pretreatment part, a hollow fiber membrane modification part, a first conveying part and a drawing part, wherein the first conveying part is arranged in the hollow fiber membrane pretreatment part and the hollow fiber membrane modification part;

2. The continuous production and modification device according to claim 1, wherein the drawing part comprises a drawing roller, the end part of the hollow fiber membrane to be modified is fixed on the drawing roller, and the drawing roller rotates to drive the hollow fiber membrane to be modified to pass through the hollow fiber membrane pretreatment part and the hollow fiber membrane modification part along the first conveying part in sequence to obtain the hollow fiber membrane.

3. The continuous production and modification apparatus according to claim 2, further comprising a first drying section and a second drying section, the first drying section being located between the hollow fiber membrane pretreatment section and the hollow fiber membrane modification section;

4. The continuous production and modification apparatus according to claim 3, further comprising a heat treatment stretching section located between the first drying section and the hollow fiber film modification section;

5. The continuous production and modification apparatus according to claim 4, wherein the hollow fiber membrane pretreatment section comprises a cooling tank and an extraction tank in this order;

6. The continuous production and modification apparatus according to claim 5, wherein the hollow fiber membrane modification section comprises an ultraviolet ozone processor and a modification tank in this order;

7. The continuous production and modification apparatus according to claim 6, further comprising a second conveyor;

the second conveying part comprises a fifth conveying element, and/or a sixth conveying element, and/or a seventh conveying element, and/or an eighth conveying element; the fifth conveying member is arranged between the cooling tank and the extraction tank; the sixth conveying member is arranged between the first drying part and the heat treatment stretching part; the seventh conveying member is arranged between the heat treatment stretching part and the ultraviolet ozone processor; the eighth transfer member is disposed between the second drying part and the drawing part;

8. The continuous production and modification apparatus of claim 7, wherein at least one of the first conveying member, the second conveying member, the third conveying member, the fourth conveying member, the fifth conveying member, the sixth conveying member, the seventh conveying member, and the eighth conveying member is N godet rollers, N is greater than or equal to 1;

9. The continuous production and modification apparatus of claim 8, wherein a controller and a tension sensor are disposed within the godet and pull rolls, and the controller and the sensor are electrically connected.

10. The continuous production and modification apparatus according to claim 9, further comprising a hollow fiber membrane post-treatment section, wherein both ends of the pulling roll are rotatably connected to the hollow fiber membrane post-treatment section, and at least a part of the pulling roll is located below the liquid level of the protective liquid in the hollow fiber membrane post-treatment section.