CN111467972B - Hollow fiber membrane production line and preparation method of hollow fiber membrane - Google Patents

Abstract

The invention relates to a hollow fiber membrane production line and a preparation method of a hollow fiber membrane, wherein the hollow fiber membrane production line comprises the following steps: a main control module; a core wire conveying mechanism; the film spraying mechanism is used for spraying the film liquid on the core wire to form film wires; the film liquid mechanism is used for supplying film liquid to the film spraying mechanism; a core wire measuring instrument; a membrane thread measuring instrument; and the main control module makes a difference between the film yarn diameter information and the core wire diameter information to obtain wall thickness data, and controls the liquid supply flow of the film liquid mechanism according to the wall thickness data and the pre-stored wall thickness. The membrane silk measuring apparatu and heart yearn measuring apparatu real-time detection heart yearn and the line footpath of membrane silk, main control module revises the solution feed flow of membrane liquid mechanism according to information real-time and forms closed-loop control, can real-time control the wall thickness of hollow fiber membrane, reduces the bad condition of membrane silk wall thickness, promotes the yields of hollow fiber membrane, saves raw and other materials and saves artifical inspection, greatly reduced cost of labor simultaneously.

Description

Hollow fiber membrane production line and preparation method of hollow fiber membrane

Technical Field

The invention relates to the field of hollow fiber membrane processing, in particular to a hollow fiber membrane production line and a preparation method of a hollow fiber membrane.

Background

At present, membrane filaments in the water purification industry include homogeneous membranes, hollow fiber membranes and the like. The production of the hollow fiber membrane can effectively improve economic benefit and reduce production cost, so that a production line of the hollow fiber membrane is planned and designed; the automatic adjustment is carried out on the control of the wall thickness of the membrane wire with different requirements.

In the traditional hollow fiber membrane production process, membrane liquid preparation, membrane filament forming, cleaning, drying, detection and material collection are all performed in a distributed and sectional manner. The detection of the wall thickness of the hollow fiber membrane is carried out by intercepting a certain number of sections from the whole bundle of membrane wires which are manufactured and detecting the sections under a production line. The detection shows that the wall thickness of the whole bundle of membrane wires is unstable, and the whole bundle of membrane wires needs to be subjected to full-detection selection or directly scrapped to ensure good products; and adjusting the equipment, sampling and producing good products. Therefore, the conventional hollow fiber membrane production not only causes a great amount of waste of raw materials, but also increases the production period and labor cost.

Disclosure of Invention

In view of the above, it is necessary to provide a hollow fiber membrane production line capable of controlling the wall thickness of membrane filaments and improving the quality of the membrane filaments when the membrane filaments are produced.

A hollow fiber membrane production line comprising:

a main control module;

the core wire conveying mechanism is electrically connected with the main control module, a wiring path is formed on the core wire conveying mechanism, and the core wires are transmitted on the wiring path;

the film spraying mechanism is arranged on the wiring path and used for spraying film liquid on the core wire to form a film wire, and the wiring path is divided into a core wire section and a film wire section by the film spraying mechanism;

the membrane liquid mechanism is connected with the membrane spraying mechanism, is electrically connected with the module and is used for providing membrane liquid for the membrane spraying mechanism;

the core wire measuring instrument is arranged on the core wire section, is electrically connected with the main control module, and is used for acquiring the wire diameter information of the core wire and transmitting the wire diameter information of the core wire to the main control module;

the membrane silk measuring instrument is arranged on the membrane silk section, is electrically connected with the main control module, and is used for acquiring the line diameter information of the membrane silk and transmitting the line diameter information of the membrane silk to the main control module;

and the main control module makes a difference between the film wire diameter information and the core wire diameter information to obtain wall thickness data, and controls the liquid supply flow of the film liquid mechanism according to the wall thickness data and the pre-stored wall thickness.

Above-mentioned hollow fiber membrane production line, the line footpath of membrane silk measuring apparatu and heart yearn measuring apparatu real-time detection heart yearn and membrane silk, main control module revises the solution feed flow of liquid mechanism according to information real-time and forms closed-loop control, can real-time control hollow fiber membrane's wall thickness, reduces the bad condition of membrane silk wall thickness, promotes hollow fiber membrane's yields, saves raw and other materials and saves artifical inspection, greatly reduced cost of labor simultaneously.

In one embodiment, the membrane liquid mechanism comprises a membrane liquid kettle, a transmission pipeline connected between the membrane liquid kettle and the membrane spraying mechanism, and a flow regulating device arranged on the transmission pipeline, wherein the flow regulating device is electrically connected with the main control module, and the main control module is used for regulating the liquid supply flow in the transmission pipeline through the flow regulating device. An electric valve is arranged in the flow regulating device, and the main control module can regulate the opening of the electric valve, so that the flow in the transmission pipeline is changed, and the thickness of membrane liquid sprayed on the core wire is further changed.

In one embodiment, the wick delivery mechanism includes: the core wire is transmitted from the wire outlet wheel to the material receiving wheel through the conveying wheels, and the film spraying mechanism is arranged between the wire outlet wheel and the material receiving wheel.

In one embodiment, the film spraying mechanism comprises: the core wire enters from the wire inlet hole, and forms a film filament after being sprayed in the film spraying mechanism, and the film filament is output from the filament outlet hole.

In one embodiment, the hollow fiber membrane production line further includes: the membrane silk processing mechanism is arranged between the silk outlet hole and the material collecting wheel and used for processing the membrane silk output by the silk outlet hole, the material collecting wheel collects the processed membrane silk, and the membrane silk measuring instrument is arranged between the membrane silk processing mechanism and the material collecting wheel. The film liquid on the surface of the film yarn after spraying is not solidified and can not be directly recovered, the film yarn processing mechanism is arranged between the yarn outlet hole and the material receiving wheel, the film yarn output from the yarn outlet hole is processed by the film yarn processing mechanism, the film yarn is processed and is recovered by the material receiving wheel after the diameter of the film yarn is measured by the film yarn measuring instrument.

In one embodiment, the membrane thread processing mechanism comprises: the device comprises a solidification tank, a cleaning tank and a dryer which are arranged in sequence, wherein the solidification tank is used for solidifying the membrane filaments output from the filament outlet hole, the cleaning tank is used for cleaning the solidified membrane filaments, and the dryer is used for drying the cleaned membrane filaments. The film yarn after being sprayed is conveyed to a material receiving wheel after being sequentially subjected to solidification, cleaning and drying treatment, so that the film liquid on the surface of the film yarn is ensured not to be lost or other impurities are adhered to the surface of the film yarn, the line diameter of the film yarn is not accurately measured, and the product is unqualified

In one embodiment, the coagulation bath comprises: the film filament solidification device comprises a box body and a solidification medium arranged in the box body, wherein a wire inlet of the box body is connected with a filament outlet, and a film filament enters the box body from the top of the box body and is solidified by the solidification medium.

In one embodiment, the top of the box body is provided with a wire inlet and a wire outlet, and the wire inlet and the wire outlet are respectively positioned at two sides of the top of the box body; and the bottom of the box body is provided with a conveying wheel. The inlet and outlet are arranged oppositely, and the arrangement of the transmission wheel maximizes the transmission path of the membrane filaments in the box body, so that the membrane filaments are better contacted with a solidification medium, the optimal solidification effect is achieved, and the conditions that the solidification effect is insufficient due to too short solidification time and the loss of membrane liquid is caused are avoided as much as possible.

In one embodiment, the transfer line is a heat-insulating transfer line.

The invention also provides a preparation method of the hollow fiber membrane, which comprises the following steps:

presetting a pre-stored wall thickness;

conveying the core wire to the film spraying mechanism through the core wire conveying mechanism to obtain the core wire diameter information measured by the core wire measuring instrument;

supplying liquid to the film spraying mechanism through a film liquid mechanism to obtain the film yarn diameter information measured by a film yarn measuring instrument;

making a difference between the film yarn diameter information and the core yarn diameter information to obtain wall thickness data;

judging whether the wall thickness data is larger than a prestored wall thickness;

if so, reducing the liquid supply flow of the membrane liquid mechanism;

and if the result is negative, increasing the liquid supply flow of the membrane liquid mechanism.

Drawings

FIG. 1 is a view showing a structure of a hollow fiber membrane production line in one embodiment;

FIG. 2 is a block diagram of a core wire feeding mechanism and a film filament processing mechanism in one embodiment;

FIG. 3 is an enlarged view taken at A in FIG. 1;

FIG. 4 is a flow chart of a method for preparing a hollow fiber membrane according to an embodiment.

Wherein: 1. a core wire conveying mechanism 11, a routing path; 12. a core segment; 13. a membrane filament section; 14. a wire outlet wheel; 15. a material receiving wheel; 2. a film spraying mechanism; 21. a wire inlet hole; 22. a liquid inlet hole; 3. a membrane liquid mechanism; 31. a membrane liquid kettle; 32. a transmission pipeline; 33. a flow regulating device; 4. a membrane thread processing mechanism; 41. a solidification tank; 411. a box body; 412. a solidification medium; 413. a wire inlet; 414. an outlet; 415. a coagulation transfer wheel; 42. a cleaning tank; 43. a dryer; 5. a core wire measuring instrument; 51. a first guide wheel; 52. a second guide wheel; 6. a membrane thread measuring instrument; 61. a third guide wheel; 62. a fourth guide wheel; 7. a first motor; 8. a transmission motor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

A first embodiment of the present invention provides a hollow fiber membrane production line for producing a hollow fiber membrane.

As shown in fig. 1, the hollow fiber membrane production line includes a main control module (not shown), a core wire conveying mechanism 1, a membrane spraying mechanism 2, a membrane liquid mechanism 3, a core wire measuring instrument 5, and a membrane wire measuring instrument 6, wherein the main control module is electrically connected with the membrane liquid mechanism 3, the core wire measuring instrument 5, and the membrane wire measuring instrument 6, and is used for controlling the membrane liquid mechanism 3, the core wire measuring instrument 5, and the membrane wire measuring instrument 6 to operate. The membrane spraying mechanism 2 is used for spraying membrane liquid on the core wire, the core wire after the membrane liquid is sprayed becomes membrane wire, and then the core wire in the membrane wire is drawn out, so that the production of the hollow fiber membrane can be realized. The core wire conveying mechanism 1 conveys the core wires to the film spraying mechanism 2, the film liquid mechanism 3 conveys the film liquid to the film spraying mechanism 2, and the film spraying mechanism 2 sprays the film liquid on the core wires.

With reference to fig. 1 and fig. 2, a routing path 11 is formed on the core wire conveying mechanism 1, the film spraying mechanism 2 is disposed on the routing path 11, the film spraying mechanism 2 divides the routing path 11 into a core wire section 12 and a film wire section 13, and the film wire is formed after the core wire enters the film spraying mechanism 2. The core wire measuring instrument 5 is arranged on the core wire section 12 and is arranged at the front end of the film spraying mechanism 2 and used for measuring the wire diameter of the core wire, transmitting the wire diameter information of the core wire and the wire diameter information of the core wire to the main control module; the membrane silk measuring apparatu 6 is established on membrane silk section 13, at the rear end of spouting membrane mechanism 2 for the line diameter information transmission of measuring the membrane silk gives the master control module. After the main control module receives the wire diameter information of the core wire and the wire diameter information of the membrane wire, the wall thickness data of the hollow fiber membrane can be obtained by making a difference. The pre-stored wall thickness is preset in the main control module, the currently processed hollow fiber membrane can be known to be thicker or thinner by comparing the wall thickness data with the pre-stored wall thickness, and the main control module can adjust the flow of the liquid supply from the membrane liquid mechanism 3 to the membrane spraying mechanism 2, so that the wall thickness of the hollow fiber membrane is controlled. The core wire measuring instrument 6 and the core wire measuring instrument 5 detect the wire diameters of the core wire and the membrane wire in real time, and the main control module modifies the liquid supply flow of the membrane liquid mechanism 3 in real time according to information to form closed-loop control, so that the wall thickness of the hollow fiber membrane can be well controlled.

Wherein, membrane liquid mechanism 3 includes: the device comprises a film liquid kettle 31, a transmission pipeline 32 connected between the film liquid kettle 31 and the film spraying mechanism 2, and a flow regulating device 33 arranged on the transmission pipeline 32, wherein the flow regulating device 33 is electrically connected with a main control module, film liquid is stored in the film liquid kettle 31, the film liquid is supplied to the film spraying mechanism 2 through the transmission pipeline 32, and the main control module is used for regulating the liquid supply flow in the transmission pipeline 32 through the flow regulating device 33, so that the film spraying effect of the film spraying mechanism 2 is changed. An electric valve is arranged in the flow regulating device 33, and the opening of the electric valve can be regulated by the main control module, so that the flow in the transmission pipeline 32 is changed, and the thickness of membrane liquid sprayed on the core wire is further changed. It should be noted that the transfer pipeline 32 is a heat preservation transfer pipeline, so as to ensure the effect of spraying the membrane liquid.

As shown in fig. 2, the core wire feeding mechanism 1 includes: go out line wheel 14, receive the material wheel 15, establish a plurality of transfer gear between go out line wheel 14 and receive the material wheel 15, the heart yearn from going out line wheel 14 through each transfer gear towards receiving the material wheel 15 transmission, spout membrane mechanism 2 and establish between going out line wheel 14 and receiving the material wheel 15 for get into after the transmission of transfer gear from the heart yearn of 14 outputs of going out line wheel and spout membrane mechanism 2, combine figure 3, spout membrane mechanism 2 and be automatic film spraying device, have: wire inlet 21, feed liquor hole 22, the silk hole of going out that is connected with transmission line 32, heart yearn follow wire inlet 21 and get into from wire inlet 21 and spout membrane mechanism 2, and the membrane liquid gets into from feed liquor hole 22 and spouts membrane mechanism 2, spouts membrane mechanism 2 and carries out the spraying to the heart yearn through the membrane liquid in feed liquor hole 22 automatically, forms the membrane silk, and the membrane silk is exported from the silk hole of going out, reaches and receives material wheel 15. However, the membrane liquid on the surface of the membrane wire after the spraying is finished is not solidified and cannot be directly recovered, and with reference to fig. 1 and 2, the hollow fiber membrane production line in the present embodiment further includes: the membrane silk processing mechanism 4, the membrane silk processing mechanism 4 is established between silk hole and receipts material wheel 15, and after the membrane silk that goes out silk hole output was handled through membrane silk processing mechanism 4, the processing of membrane silk is accomplished, is retrieved through receiving material wheel 15 after measuring the line footpath by membrane silk measuring apparatu 6.

The membrane thread processing mechanism 4 includes: the coagulation tank 41, the cleaning tank 42 and the dryer 43 are arranged, that is, the sprayed membrane filaments are sequentially subjected to coagulation, cleaning and drying treatment and then conveyed to the material receiving wheel 15, so that the membrane liquid on the surface of the membrane filaments is ensured not to be lost or other impurities are attached to the surface of the membrane filaments, the measurement of the linear diameter of the membrane filaments is not accurate, and the product is unqualified. Wherein the coagulation tank 41 includes: the film liquid on the surface of the film filament can be cooled by the solidification medium 412 through absorbing heat, so that the film liquid on the surface of the film filament is solidified, and the solidification medium 412 can solidify the surface of the film filament through other manners, which is not specifically limited in this embodiment. The box 411 is square, a wire inlet 413 and a wire outlet 414 are formed in the box 411, the wire inlet 413 is connected with a wire outlet hole of the film spraying mechanism 2, film wires output from the wire outlet hole can directly enter the solidification pool 41 through the wire inlet 413, and therefore film liquid which is not solidified is prevented from being lost when the film wires are transmitted. The membrane filaments are subjected to solidification treatment by the solidification medium 412 in the solidification tank 41, then output from the outlet 414 and enter the cleaning tank 42, the cleaning tank 42 cleans impurities on the surface of the membrane filaments and the solidification medium 412 which may be attached, the membrane filaments pass through the cleaning tank 42 and then enter the dryer 43, and the dryer 43 dries the moisture on the surface of the cleaned membrane filaments.

It should be noted that the inlet 413 and the outlet 414 are both disposed at the top of the box 411, and are located at two sides of the top of the box 411 with the largest distance, the cross section of the box 411 is quadrilateral, the wire inlet 413 and the wire outlet 414 are respectively located at two vertexes of the top side, and the bottom of the box 411 is provided with a conveying wheel, preferably, the conveying wheel in the embodiment is a solidification conveying wheel 415 arranged on two vertexes of the bottom edge of the box 411, the film silk entering from the wire inlet 413 passes through two bottom corners of the box 411 in sequence and then is output from the wire outlet 414, the wire inlet 413 and the wire outlet 414 are arranged oppositely, and the setting of the solidification conveying wheel 415 maximizes the transmission path of the membrane filaments in the box 411, so that the membrane filaments can better contact the solidification medium 412, the optimal solidification effect is achieved, and the situations of insufficient solidification effect and membrane liquid loss caused by too short solidification time are avoided as far as possible. The outlet 414 is provided with a transmission motor 8, the transmission motor 8 is electrically connected with the main control module, and the transmission motor 8 transmits the core wire out of the solidification pool 41 and provides power for the core wire transmitted in the solidification pool 41.

The core wire measuring instrument 5 and the membrane wire measuring instrument 6 may be laser diameter measuring instruments, or may be other measuring instruments, and in this embodiment, only the laser diameter measuring instrument is taken as an example, and is not particularly limited. It should be noted that the core wire measuring instrument 5 is provided with a first motor 7 electrically connected with the main control module at the front side of the routing path 11, and is provided with a first guiding wheel 51 at the rear side, and a connecting line between the first motor 7 and the first guiding wheel 51 is horizontal and flush with the paying-off height of the paying-off wheel, so that the measuring accuracy is ensured by the horizontal of the core wire measuring instrument 5. And a second guide wheel 52 is arranged behind the first guide wheel 51 on the routing path 11, and the height of the second guide wheel 52 is higher than that of the first guide wheel 51, so that the core wire is lifted to be convenient to enter the solidification tank 41. The front end and the rear end of the membrane silk measuring instrument 6 on the wiring path 11 are respectively provided with a third guide wheel 61 and a fourth guide wheel 62, and are flush with the height of the output side of the dryer 43, so that the membrane silk level passes through the membrane silk measuring instrument 6, and the membrane silk measuring instrument 6 is convenient for carrying out accurate line diameter measurement on the membrane silk. The third guide wheel 61 and the fourth guide wheel 62 are flush with the take-up height of the material receiving wheel 15, so that the film filaments can be conveniently collected.

Before the hollow fiber membrane is produced, a pre-stored wall thickness is preset in the main control module, the pre-stored wall thickness is determined according to product requirements, and the main control module can produce an initial membrane spraying flow according to the pre-stored wall thickness. When the hollow fiber membrane is produced, the main control module controls the first motor 7 and the transmission motor 8 to be started, the core wire starts to transmit, and meanwhile, the flow regulating device 33 of the membrane liquid assembly is started to enable the flow of the membrane liquid in the transmission pipeline to be the initial membrane spraying flow. The core wire is transmitted out from the wire outlet wheel 14, passes through the core wire measuring instrument 5, and the core wire measuring instrument 5 monitors the core wire diameter in real time and transmits the real-time core wire diameter data to the main control module. The core wire passing through the core wire measuring instrument 5 enters the film spraying mechanism 2, the film spraying mechanism 2 sprays the core wire with film liquid to form a film wire, the film wire is output from the film spraying mechanism 2 and then enters the solidification tank 41 to be solidified, the solidified film wire sequentially passes through the cleaning tank 42 and the dryer 43 to be cleaned and dried, a fiber film on the surface of the film wire is hardened and cleaned, the dried film wire is continuously transmitted through the film wire measuring instrument 6, the film wire measuring instrument 6 measures the wire diameter of the film wire in real time and transmits the film wire data to the main control module in real time, the main control module performs difference on the film wire diameter data and the core wire data after receiving the film wire diameter data and the core wire data to obtain actual wall thickness data, the actual wall thickness data is compared with the pre-stored wall thickness, if the actual wall thickness is equal to the pre-stored wall thickness, the film wire is qualified, and no adjustment is performed; if the actual wall thickness is larger than the preset wall thickness, the fiber membrane on the surface of the membrane yarn is too thick, and the flow regulating device 33 is controlled to reduce the membrane liquid flow in the transmission pipeline; and if the actual wall thickness is smaller than the preset wall thickness, which indicates that the fiber membrane on the surface of the membrane wire is too thin, controlling the flow regulating equipment 33 to increase the membrane liquid flow in the conveying pipeline. The main control module adjusts the membrane liquid flow according to the real-time data of the core wire and the membrane wire, so that the wall thickness of the hollow fiber membrane is detected and controlled and adjusted in real time, the condition of poor wall thickness of the membrane wire is reduced, the yield of the hollow fiber membrane is improved, raw materials are saved, meanwhile, manual inspection is omitted, and the labor cost is greatly reduced.

A second embodiment of the present invention relates to a method for producing a hollow fiber membrane, which may be applied to the hollow fiber membrane production line of the first embodiment, as shown in fig. 4, including the steps of:

110. presetting a pre-stored wall thickness; the pre-stored wall thickness is determined according to the product requirements, and the main control module can produce an initial film spraying flow according to the pre-stored wall thickness.

120. Conveying the core wire to the film spraying mechanism through the core wire conveying mechanism to obtain the core wire diameter information measured by the core wire measuring instrument; the main control module controls the first motor and the transmission motor to start, the core wire starts to be transmitted, the core wire is transmitted out from the wire outlet wheel, the core wire measuring instrument monitors the wire diameter of the core wire in real time after passing through the core wire measuring instrument, and real-time core wire diameter data are transmitted to the main control module.

130. Supplying liquid to the film spraying mechanism through the film liquid mechanism to obtain the film yarn diameter information measured by the film yarn measuring instrument; and starting the flow regulating equipment of the membrane liquid assembly to make the flow of the membrane liquid in the transmission pipeline be the initial membrane spraying flow. The film spraying mechanism sprays the core wire with the film liquid to form a film wire, the film wire is continuously transmitted through the film wire measuring instrument, the film wire measuring instrument measures the wire diameter of the film wire in real time, and transmits the data of the film wire to the main control module in real time.

140. Making a difference between the film yarn diameter information and the core yarn diameter information to obtain wall thickness data;

150. judging whether the wall thickness data is larger than the prestored wall thickness;

if so, executing 160 and reducing the liquid supply flow of the membrane liquid mechanism; if the actual wall thickness is larger than the preset wall thickness, the fiber membrane on the surface of the membrane yarn is too thick, and the flow regulating equipment is controlled to reduce the flow of the membrane liquid in the transmission pipeline

If not, executing 170 and increasing the liquid supply flow of the membrane liquid mechanism. And if the actual wall thickness is smaller than the preset wall thickness, the fiber membrane on the surface of the membrane yarn is too thin, and the flow regulating equipment is controlled to increase the membrane liquid flow in the transmission pipeline.

If the wall thickness data is equal to the pre-stored wall thickness, no adjustment is made.

180. And collecting the membrane filaments.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A hollow fiber membrane production line, characterized by comprising:

a main control module;

the core wire conveying mechanism is electrically connected with the main control module, a wiring path is formed on the core wire conveying mechanism, and the core wires are transmitted on the wiring path;

the film spraying mechanism is arranged on the wiring path and used for spraying film liquid on the core wire to form a film wire, and the wiring path is divided into a core wire section and a film wire section by the film spraying mechanism;

the film liquid mechanism is connected with the film spraying mechanism, is electrically connected with the main control module and is used for supplying film liquid to the film spraying mechanism;

the core wire measuring instrument is arranged on the core wire section, is electrically connected with the main control module, and is used for acquiring the wire diameter information of the core wire and transmitting the wire diameter information of the core wire to the main control module;

the membrane silk measuring instrument is arranged on the membrane silk section, is electrically connected with the main control module, and is used for acquiring the line diameter information of the membrane silk and transmitting the line diameter information of the membrane silk to the main control module;

the main control module makes a difference between the film wire diameter information and the core wire diameter information to obtain wall thickness data, and controls the liquid supply flow of the film liquid mechanism according to the wall thickness data and the pre-stored wall thickness;

the membrane liquid mechanism comprises a membrane liquid kettle, a transmission pipeline connected between the membrane liquid kettle and the membrane spraying mechanism, and a flow regulating device arranged on the transmission pipeline, wherein the flow regulating device is electrically connected with the main control module, and the main control module is used for regulating the liquid supply flow in the transmission pipeline through the flow regulating device.

2. The hollow fiber membrane production line of claim 1, wherein the wick conveying mechanism comprises: the core wire is transmitted from the wire outlet wheel to the material receiving wheel through the conveying wheels, and the film spraying mechanism is arranged between the wire outlet wheel and the material receiving wheel.

3. The hollow fiber membrane production line according to claim 2, wherein the membrane spraying mechanism has: the core wire enters from the wire inlet hole, and forms a film filament after being sprayed in the film spraying mechanism, and the film filament is output from the filament outlet hole.

4. The hollow fiber membrane production line of claim 3, further comprising: the membrane silk processing mechanism is arranged between the silk outlet hole and the material collecting wheel and used for processing the membrane silk output by the silk outlet hole, the material collecting wheel collects the processed membrane silk, and the membrane silk measuring instrument is arranged between the membrane silk processing mechanism and the material collecting wheel.

5. The hollow fiber membrane production line of claim 4, wherein the membrane filament handling mechanism comprises: the device comprises a solidification tank, a cleaning tank and a dryer which are arranged in sequence, wherein the solidification tank is used for solidifying the membrane filaments output from the filament outlet hole, the cleaning tank is used for cleaning the solidified membrane filaments, and the dryer is used for drying the cleaned membrane filaments.

6. The hollow fiber membrane production line of claim 5, wherein the coagulation tank comprises: the film filament solidification device comprises a box body and a solidification medium arranged in the box body, wherein a wire inlet of the box body is connected with a filament outlet, and a film filament enters the box body from the top of the box body and is solidified by the solidification medium.

7. The hollow fiber membrane production line of claim 6, wherein a wire inlet and a wire outlet are arranged at the top of the box body, and the wire inlet and the wire outlet are respectively positioned at two sides of the top of the box body; and the bottom of the box body is provided with a conveying wheel.

8. The hollow fiber membrane production line of claim 1, wherein the transfer line is a heat-insulating transfer line.

9. The hollow fiber membrane production line of claim 1, wherein the core wire gauge is a laser caliper.

10. A method of producing a hollow fiber membrane according to the hollow fiber membrane production line of claim 1, characterized by comprising the steps of:

presetting a pre-stored wall thickness;

conveying the core wire to the film spraying mechanism through the core wire conveying mechanism to obtain the core wire diameter information measured by the core wire measuring instrument;

supplying liquid to the film spraying mechanism through a film liquid mechanism to obtain the film yarn diameter information measured by a film yarn measuring instrument;

making a difference between the film yarn diameter information and the core yarn diameter information to obtain wall thickness data;

judging whether the wall thickness data is larger than a prestored wall thickness;

if so, reducing the liquid supply flow of the membrane liquid mechanism;

and if the result is negative, increasing the liquid supply flow of the membrane liquid mechanism.

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