Glue spraying pressure control system and method for lyocell fiber production spinneret plate

Abstract

The invention discloses a lyocell fiber production spinneret plate glue spraying pressure control system and method.The lyocell fiber production spinneret plate glue spraying pressure control system comprises a spinneret plate, a temperature regulator and a master controller, the spinneret plate comprises a spinneret plate body and a spinneret plate filter screen, the temperature regulator is connected with the master controller, and the master controller is connected with the temperature regulator. The spinneret plate filter screen is arranged on the spinneret plate body and communicated with the spinneret plate body, a first pressure measuring device is arranged on the liquid inlet side of the spinneret plate filter screen, and a second pressure measuring device is arranged on the liquid outlet side of the spinneret plate filter screen; the temperature regulator is electrically connected with the spinneret plate and can be used for regulating the temperature of water in the spinneret plate; the master controller is electrically connected with the first pressure measuring device, the second pressure measuring device and the temperature regulator. Through the arrangement, the pressure difference of the spinneret plate can be kept stable, so that the influence of the viscosity change of the glue solution on the production stability is further reduced, broken ends are reduced, and the spinning quality is effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of spinning equipment, and in particular relates to a glue spraying pressure control system and method for a spinneret in the production of lyocell fibers. Background Art

[0002] With the wide application of lyocell fiber, the market and customers have higher and higher requirements on the quality stability of lyocell fiber. Through the research on spinning process, combined with rheological knowledge and actual production experience, the inventor found that the stability of the viscosity of the glue exiting the spinneret has a very important influence on the quality of spinning.

[0003] Among them, the viscosity of the glue liquid out of the spinneret is mainly affected by the glue liquid viscosity heat exchanger and the spinneret insulation temperature. However, the polymerization degree of pulp in the glue liquid is unstable, and even the polymerization degree of pulp in the same batch can vary greatly. It is difficult to keep the viscosity of the glue liquid stable at a value for a long time during the spinning production process. Therefore, it is difficult to ensure the stability of the viscosity of the glue liquid out of the spinneret, which causes breakage and affects the stable production.

[0004] Therefore, how to reduce the occurrence of broken ends, ensure stable production, and effectively improve the production quality of spinning is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a lyocell fiber production spinneret glue spraying pressure control system, which can reduce the occurrence of breakage, ensure stable production, and effectively improve the quality of spinning.

[0006] Another object of the present invention is to provide a method for controlling the glue spraying pressure of a spinneret in the production of lyocell fibers.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A lyocell fiber production spinneret glue spraying pressure control system, comprising:

[0009] A spinneret, comprising a spinneret body and a spinneret filter, wherein the spinneret filter is arranged on the spinneret body and communicated with the spinneret body, a first pressure measuring device is arranged on the liquid inlet side of the spinneret filter, and a second pressure measuring device is arranged on the liquid outlet side of the spinneret filter;

[0010] A temperature regulator, electrically connected to the spinneret and capable of regulating the temperature of water in the spinneret;

[0011] The main controller is electrically connected to the first pressure measuring device, the second pressure measuring device and the temperature regulator respectively.

[0012] Optionally, also include:

[0013] A heat exchanger, wherein a third pressure measuring device is provided on the liquid inlet side of the heat exchanger, and a fourth pressure measuring device is provided on the liquid outlet side of the heat exchanger;

[0014] The heat exchanger is electrically connected to the temperature regulator, and the temperature regulator can regulate the water temperature in the heat exchanger;

[0015] The third pressure measuring device and the fourth pressure measuring device are both electrically connected to the overall controller.

[0016] Optionally, a metering pump is further included, and the metering pump is arranged between the heat exchanger and the spinneret filter.

[0017] Optionally, the temperature regulator includes a first temperature regulator and a second temperature regulator, the first temperature regulator is electrically connected to the heat exchanger, and the second temperature regulator is electrically connected to the spinneret.

[0018] Optionally, the master controller includes:

[0019] A receiving module, used for receiving the glue pressure values ​​of the first pressure measuring device and the second pressure measuring device, and the glue pressure values ​​of the third pressure measuring device and the fourth pressure measuring device;

[0020] A calculation module, used to calculate the actual pressure difference of the glue liquid entering and leaving the spinneret filter, and the actual pressure difference of the glue liquid entering and leaving the heat exchanger;

[0021] A storage module, used for storing a preset pressure value of a spinneret and a preset pressure value of a heat exchanger;

[0022] A comparison module, used to compare the actual pressure difference of the glue liquid entering and leaving the spinneret filter with the preset pressure value of the spinneret, and to compare the actual pressure difference of the glue liquid entering and leaving the heat exchanger with the preset pressure value of the heat exchanger;

[0023] The transmission module is used to transmit the comparison result obtained by the comparison module to the temperature regulator.

[0024] Optionally, a first pipeline is provided at the liquid inlet side of the heat exchanger, and the third pressure measuring device is provided on the first pipeline;

[0025] A second pipeline is provided between the heat exchanger and the metering pump, and the fourth pressure measuring device is provided on the second pipeline;

[0026] A third pipeline is provided between the metering pump and the spinneret, and the first pressure measuring device is provided on the third pipeline;

[0027] The second pressure measuring device is arranged at the liquid outlet of the spinneret filter.

[0028] Optionally, the heat exchanger is a shell and tube heat exchanger, a plate heat exchanger or a spiral plate heat exchanger.

[0029] Optionally, the metering pump is a reciprocating metering pump, a rotary metering pump, or a gear metering pump.

[0030] A method for controlling the glue spraying pressure of a spinneret for producing lyocell fibers, which is applied to the glue spraying pressure control of a spinneret for producing lyocell fibers as described in any one of the above, comprises the following steps:

[0031] Measuring the pressure of the adhesive liquid entering the spinneret filter and the pressure of the adhesive liquid flowing out of the spinneret filter, obtaining the actual pressure value of the adhesive liquid entering and leaving the spinneret filter, and transmitting the actual pressure value of the adhesive liquid entering and leaving the spinneret filter;

[0032] Receive the actual pressure value of the adhesive liquid entering and leaving the spinneret filter, and calculate the pressure difference of the adhesive liquid entering and leaving the spinneret filter;

[0033] The pressure difference of the glue liquid entering and leaving the spinneret filter is compared with the preset pressure difference of the spinneret. When the pressure difference of the glue liquid entering and leaving the spinneret filter is not within the preset pressure difference range of the spinneret, a signal is transmitted to the temperature regulator, and the temperature regulator adjusts the water temperature in the spinneret to ensure that the pressure difference of the glue liquid entering and leaving the spinneret filter is maintained within the preset pressure difference range of the spinneret.

[0034] Optionally, the following steps are also included:

[0035] Measure the pressure of the glue liquid entering the heat exchanger and the pressure of the glue liquid flowing out of the heat exchanger, obtain the actual pressure value of the glue liquid entering and leaving the heat exchanger, and transmit the actual pressure value of the glue liquid entering and leaving the heat exchanger;

[0036] Receive the actual pressure value of the glue liquid entering and leaving the heat exchanger, and calculate the pressure difference of the glue liquid entering and leaving the heat exchanger;

[0037] The pressure difference of the glue liquid entering and leaving the heat exchanger is compared with the preset pressure difference of the heat exchanger. When the pressure difference of the glue liquid entering and leaving the heat exchanger is not within the preset pressure difference range of the heat exchanger, a signal is transmitted to the temperature regulator, and the temperature regulator adjusts the water temperature in the heat exchanger to keep the pressure difference of the glue liquid entering and leaving the heat exchanger within the preset pressure difference range of the heat exchanger.

[0038] It can be seen from the above technical scheme that when the glue spraying pressure control system of the spinneret for producing Lyocell fiber is working, the first pressure measuring device measures the pressure of the glue liquid entering the spinneret filter, and the second pressure measuring device measures the pressure of the glue liquid flowing out of the spinneret filter to obtain the actual pressure value of the glue liquid entering and leaving the spinneret filter, and transmits the actual pressure value signal of the glue liquid entering and leaving the spinneret filter to the main controller, the main controller receives the actual pressure value of the glue liquid entering and leaving the spinneret filter, and calculates the pressure difference of the glue liquid entering and leaving the spinneret filter, and then the main controller compares the pressure difference of the glue liquid entering and leaving the spinneret filter with the preset pressure difference of the spinneret, when the pressure difference of the glue liquid entering and leaving the spinneret filter is not within the preset pressure difference range of the spinneret, the main controller transmits the signal to the temperature regulator, and the temperature regulator adjusts the water temperature in the spinneret so that the pressure difference of the glue liquid entering and leaving the spinneret filter remains within the preset pressure difference range of the spinneret. This setting can maintain a stable pressure difference on the spinneret, thereby further reducing the impact of changes in the viscosity of the glue solution on production stability, reducing the occurrence of spindle breakage, and effectively improving the quality of spinning. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0040] Figure 1 A schematic structural diagram of a lyocell fiber production spinneret glue spraying pressure control system provided in an embodiment of the present invention.

[0041] Description of reference numerals:

[0042] 100, spinneret; 101, spinneret body; 102, spinneret filter; 103, first pressure measuring device; 104, second pressure measuring device; 200, first temperature regulator; 300, second temperature regulator; 400, main controller; 500, heat exchanger; 501, third pressure measuring device; 502, fourth pressure measuring device; 600, metering pump; 700, first pipeline; 800, second pipeline; 900, third pipeline. DETAILED DESCRIPTION

[0043] Currently, the market and customers have increasingly higher requirements for the quality stability of Lyocell fibers. Through research on the spinning process, combined with rheological knowledge and actual production experience, the inventors found that the stability of the viscosity of the glue exiting the spinneret has a very important influence on the quality of spinning.

[0044] The inventors further discovered that the pressure difference of the spinneret glue spraying is proportional to the viscosity of the glue liquid exiting the spinneret. If the pressure difference of the spinneret glue spraying is stable, the viscosity of the glue liquid exiting the spinneret will be stable.

[0045] In view of this, the core of the present invention is to provide a lyocell fiber production spinneret glue spraying pressure control system, which can reduce the occurrence of spinneret breakage, ensure stable production, and thus effectively improve the quality of spinning.

[0046] Another core of the present invention is to provide a method for controlling the glue spraying pressure of a spinneret in the production of lyocell fibers.

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] Please refer to Figure 1 The lyocell fiber production spinneret glue spraying pressure control system disclosed in the embodiment of the present invention includes a spinneret 100, a temperature regulator and a master controller 400, wherein the spinneret 100 includes a spinneret body 101 and a spinneret filter 102, the spinneret filter 102 is arranged on the spinneret body 101 and is connected to the spinneret body 101, a first pressure measuring device 103 is arranged on the liquid inlet side of the spinneret filter 102, and a second pressure measuring device 104 is arranged on the liquid outlet side of the spinneret filter 102, the temperature regulator is electrically connected to the spinneret 100, and can adjust the water temperature in the spinneret 100, and the master controller 400 is electrically connected to the first pressure measuring device 103, the second pressure measuring device 104 and the temperature regulator respectively.

[0049] When the glue spraying pressure control system of the spinneret of the Lyocell fiber production is working, the first pressure measuring device 103 measures the pressure of the glue entering the spinneret filter 102, and the second pressure measuring device 104 measures the pressure of the glue flowing out of the spinneret filter 102, so as to obtain the actual pressure value of the glue entering and leaving the spinneret filter 102, and transmit the actual pressure value signal of the glue entering and leaving the spinneret filter 102 to the main controller 400, which receives the actual pressure value of the glue entering and leaving the spinneret filter 102 and calculates the pressure value of the glue entering and leaving the spinneret filter 102. The main controller 400 then compares the pressure difference of the glue entering and exiting the spinneret filter 102 with the preset pressure difference of the spinneret. When the pressure difference of the glue entering and exiting the spinneret filter 102 is not within the preset pressure difference range of the spinneret, the main controller 400 transmits a signal to the temperature regulator, which adjusts the water temperature in the spinneret 100 so that the pressure difference of the glue entering and exiting the spinneret filter 102 remains within the preset pressure difference range of the spinneret. With this arrangement, the pressure difference of the spinneret 100 can be maintained stable, thereby further reducing the impact of the viscosity change of the glue on the production stability, reducing the occurrence of broken ends, and effectively improving the quality of spinning.

[0050] As a further embodiment, the lyocell fiber production spinneret glue spraying pressure control system disclosed in the embodiment of the present invention also includes a heat exchanger 500, wherein a third pressure measuring device 501 is provided on the liquid inlet side of the heat exchanger 500, and a fourth pressure measuring device 502 is provided on the liquid outlet side of the heat exchanger 500, the heat exchanger 500 is electrically connected to a temperature regulator, and the temperature regulator can adjust the water temperature in the heat exchanger 500, and the third pressure measuring device 501, the fourth pressure measuring device 502 and the temperature regulator of the heat exchanger 500 are all electrically connected to the main controller 400.

[0051] The third pressure measuring device 501 measures the pressure value of the glue liquid entering the heat exchanger 500, and the fourth pressure measuring device 502 measures the pressure value of the glue liquid flowing out of the heat exchanger 500, so as to obtain the actual pressure value of the glue liquid entering and leaving the heat exchanger 500, and transmit the actual pressure value signal of the glue liquid entering and leaving the heat exchanger 500 to the main controller 400, the main controller 400 receives the actual pressure value of the glue liquid entering and leaving the heat exchanger 500, and calculates the pressure difference of the glue liquid entering and leaving the heat exchanger 500, and then the main controller 400 transmits the pressure difference of the glue liquid entering and leaving the heat exchanger 500 to the main controller 400. Compared with the preset pressure difference of the heat exchanger, when the pressure difference of the glue liquid entering and leaving the heat exchanger 500 is not within the preset pressure difference of the heat exchanger, the main controller 400 transmits a signal to the temperature regulator, and the temperature regulator adjusts the water temperature in the heat exchanger 500 to make the pressure difference of the glue liquid entering and leaving the heat exchanger 500 remain within the preset pressure difference range of the heat exchanger. With this setting, the pressure difference of the heat exchanger 500 can be maintained stable, thereby further reducing the impact of changes in the viscosity of the glue liquid on production stability, reducing the occurrence of broken ends, and effectively improving the quality of spinning.

[0052] As a further embodiment, the lyocell fiber production spinneret glue spraying pressure control system disclosed in the embodiment of the present invention further includes a metering pump 600, wherein the metering pump 600 is arranged between the heat exchanger 500 and the spinneret filter 102. Such an arrangement facilitates the smooth delivery of the glue solution.

[0053] It should be noted that there may be one or two temperature regulators, which is not specifically limited in the embodiment of the present invention, and those skilled in the art may make a selection according to actual conditions.

[0054] As a preferred embodiment, the temperature regulator disclosed in the embodiment of the present invention includes a first temperature regulator 200 and a second temperature regulator 300, wherein the first temperature regulator 200 is electrically connected to the heat exchanger 500, and the second temperature regulator 300 is electrically connected to the spinneret 100. In this way, the first temperature regulator 200 and the second temperature regulator 300 do not affect each other, and when one of them is damaged, it does not affect the normal use of the other.

[0055] It should be noted that the main controller 400 includes a receiving module, a calculating module, a storage module, a comparing module and a transmitting module.

[0056] Among them, the receiving module is used to receive the glue liquid pressure values ​​of the first pressure measuring device 103 and the second pressure measuring device 104, as well as the glue liquid pressure values ​​of the third pressure measuring device 501 and the fourth pressure measuring device 502; the calculating module is used to calculate the actual pressure difference of the glue liquid entering and exiting the spinneret filter 102, and the actual pressure difference of the glue liquid entering and exiting the heat exchanger 500; the storage module is used to store the spinneret preset pressure value and the heat exchanger preset pressure value; the comparing module is used to compare the actual pressure difference of the glue liquid entering and exiting the spinneret filter 102 with the spinneret preset pressure value, and to compare the actual pressure difference of the glue liquid entering and exiting the heat exchanger 500 with the heat exchanger preset pressure value; the transmitting module is used to transmit the comparison result obtained by the comparing module to the temperature regulator.

[0057] It should be noted that a first pipeline 700 is provided at the liquid inlet side of the heat exchanger 500, and a third pressure measuring device 501 is provided on the first pipeline 700; a second pipeline 800 is provided between the heat exchanger 500 and the metering pump 600, and a fourth pressure measuring device 502 is provided on the second pipeline 800; a third pipeline 900 is provided between the metering pump 600 and the spinneret 100, and a first pressure measuring device 103 is provided on the third pipeline 900; and a second pressure measuring device 104 is provided at the liquid outlet of the spinneret filter 102.

[0058] The embodiment of the present invention does not limit the specific structure of the heat exchanger 500. The heat exchanger 500 can be a shell and tube heat exchanger, a plate heat exchanger, a spiral plate heat exchanger, or a heat exchanger of other structures. As long as the structure meets the use requirements of the present invention, it is within the protection scope of the present invention, and technicians in this field can make a choice according to actual conditions.

[0059] The embodiment of the present invention does not limit the specific structure of the metering pump 600. The metering pump 600 can be a reciprocating metering pump, a rotary metering pump, a gear metering pump, or a metering pump of other structures. As long as the structure meets the use requirements of the present invention, it is within the protection scope of the present invention, and those skilled in the art can make a selection according to actual conditions.

[0060] The embodiment of the present invention discloses a method for controlling the glue spraying pressure of a spinneret for producing lyocell fibers, which is applied to the glue spraying pressure control of a spinneret for producing lyocell fibers as described above, and specifically comprises the following steps:

[0061] Measuring the pressure of the glue liquid entering the spinneret filter 102 and the pressure of the glue liquid flowing out of the spinneret filter 102, obtaining the actual pressure value of the glue liquid entering and leaving the spinneret filter 102, and transmitting the actual pressure value of the glue liquid entering and leaving the spinneret filter 102;

[0062] Receiving the actual pressure value of the glue liquid entering and exiting the spinneret filter 102, and calculating the actual pressure difference of the glue liquid entering and exiting the spinneret filter 102;

[0063] The actual pressure difference of the glue liquid entering and exiting the spinneret filter 102 is compared with the preset pressure difference of the spinneret. When the actual pressure difference of the glue liquid entering and exiting the spinneret filter 102 is not within the preset pressure difference range of the spinneret, a signal is transmitted to the temperature regulator, and the temperature regulator adjusts the water temperature in the spinneret 100 to ensure that the actual pressure difference of the glue liquid entering and exiting the spinneret filter 102 is maintained within the preset pressure difference range of the spinneret.

[0064] Specifically, the first pressure measuring device 103 measures the pressure of the glue liquid entering the spinneret filter 102, and the second pressure measuring device 104 measures the pressure of the glue liquid flowing out of the spinneret filter 102, so as to obtain the actual pressure value of the glue liquid entering and leaving the spinneret filter 102, and transmits the actual pressure value signal of the glue liquid entering and leaving the spinneret filter 102 to the main controller 400, which receives the actual pressure value of the glue liquid entering and leaving the spinneret filter 102 and calculates the glue liquid entering and leaving the spinneret filter 102. The main controller 400 compares the pressure difference of the glue liquid entering and leaving the spinneret filter 102 with the preset pressure difference of the spinneret. When the pressure difference of the glue liquid entering and leaving the spinneret filter 102 is not within the preset pressure difference range of the spinneret, the main controller 400 transmits a signal to the temperature regulator, and the temperature regulator adjusts the water temperature in the spinneret 100 to keep the pressure difference of the glue liquid entering and leaving the spinneret filter 102 within the preset pressure difference range of the spinneret. With this arrangement, the pressure difference of the spinneret 100 can be maintained stable, thereby further reducing the impact of the viscosity change of the glue liquid on the production stability, reducing the occurrence of broken ends, and effectively improving the quality of spinning.

[0065] As a further embodiment, the method for controlling the glue spraying pressure of the spinneret 100 for producing lyocell fibers disclosed in the embodiment of the present invention further includes the following steps:

[0066] Measuring the pressure of the glue liquid entering the heat exchanger 500 and the pressure of the glue liquid flowing out of the heat exchanger 500, obtaining the actual pressure value of the glue liquid entering and exiting the heat exchanger 500, and transmitting the actual pressure value of the glue liquid entering and exiting the heat exchanger 500;

[0067] Receiving the actual pressure value of the glue liquid entering and exiting the heat exchanger 500, and calculating the pressure difference of the glue liquid entering and exiting the heat exchanger 500;

[0068] The pressure difference of the glue liquid entering and exiting the heat exchanger 500 is compared with the preset pressure difference of the heat exchanger. When the pressure difference of the glue liquid entering and exiting the heat exchanger 500 is not within the preset pressure difference range of the heat exchanger, a signal is transmitted to the temperature regulator, and the temperature regulator adjusts the water temperature in the heat exchanger 500 to ensure that the pressure difference of the glue liquid entering and exiting the heat exchanger 500 is maintained within the preset pressure difference range of the heat exchanger.

[0069] Specifically, the third pressure measuring device 501 measures the pressure value of the glue liquid entering the heat exchanger 500, and the fourth pressure measuring device 502 measures the pressure value of the glue liquid flowing out of the heat exchanger 500, so as to obtain the actual pressure value of the glue liquid entering and leaving the heat exchanger 500, and transmits the actual pressure value signal of the glue liquid entering and leaving the heat exchanger 500 to the main controller 400, the main controller 400 receives the actual pressure value of the glue liquid entering and leaving the heat exchanger 500, and calculates the pressure difference of the glue liquid entering and leaving the heat exchanger 500, and then the main controller 400 transmits the pressure difference of the glue liquid entering and leaving the heat exchanger 500 to the main controller 400. Compared with the preset pressure difference of the heat exchanger, when the pressure difference of the glue liquid entering and leaving the heat exchanger 500 is not within the preset pressure difference of the heat exchanger, the main controller 400 transmits a signal to the temperature regulator, and the temperature regulator adjusts the water temperature in the heat exchanger 500 to make the pressure difference of the glue liquid entering and leaving the heat exchanger 500 remain within the preset pressure difference range of the heat exchanger. With this setting, the pressure difference of the heat exchanger 500 can be maintained stable, thereby further reducing the impact of changes in the viscosity of the glue liquid on production stability, reducing the occurrence of broken ends, and effectively improving the quality of spinning.

[0070] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0071] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0072] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lyocell fiber production spinneret glue spraying pressure control system, characterized in that: include: A spinneret, comprising a spinneret body and a spinneret filter, wherein the spinneret filter is arranged on the spinneret body and communicated with the spinneret body, a first pressure measuring device is arranged on the liquid inlet side of the spinneret filter, and a second pressure measuring device is arranged on the liquid outlet side of the spinneret filter; A temperature regulator, electrically connected to the spinneret and capable of regulating the temperature of water in the spinneret; The main controller is electrically connected to the first pressure measuring device, the second pressure measuring device and the temperature regulator respectively.

2. The lyocell fiber production spinneret glue spraying pressure control system according to claim 1, characterized in that: Also includes: A heat exchanger, wherein a third pressure measuring device is provided on the liquid inlet side of the heat exchanger, and a fourth pressure measuring device is provided on the liquid outlet side of the heat exchanger; The heat exchanger is electrically connected to the temperature regulator, and the temperature regulator can regulate the water temperature in the heat exchanger; The third pressure measuring device and the fourth pressure measuring device are both electrically connected to the overall controller.

3. The lyocell fiber production spinneret glue spraying pressure control system according to claim 2, characterized in that: It also includes a metering pump, which is arranged between the heat exchanger and the spinneret filter.

4. The lyocell fiber production spinneret glue spraying pressure control system according to claim 2, characterized in that: The temperature regulator includes a first temperature regulator and a second temperature regulator, the first temperature regulator is electrically connected to the heat exchanger, and the second temperature regulator is electrically connected to the spinneret.

5. The lyocell fiber production spinneret glue spraying pressure control system according to claim 2, characterized in that: The overall controller comprises: A receiving module, used for receiving the glue pressure values ​​of the first pressure measuring device and the second pressure measuring device, and the glue pressure values ​​of the third pressure measuring device and the fourth pressure measuring device; A calculation module, used to calculate the actual pressure difference of the glue liquid entering and leaving the spinneret filter, and the actual pressure difference of the glue liquid entering and leaving the heat exchanger; A storage module, used for storing a preset pressure value of a spinneret and a preset pressure value of a heat exchanger; A comparison module, used to compare the actual pressure difference of the glue liquid entering and leaving the spinneret filter with the preset pressure value of the spinneret, and to compare the actual pressure difference of the glue liquid entering and leaving the heat exchanger with the preset pressure value of the heat exchanger; The transmission module is used to transmit the comparison result obtained by the comparison module to the temperature regulator.

6. The lyocell fiber production spinneret glue spraying pressure control system according to claim 3, characterized in that: The liquid inlet side of the heat exchanger is provided with a first pipeline, and the third pressure measuring device is provided on the first pipeline; A second pipeline is provided between the heat exchanger and the metering pump, and the fourth pressure measuring device is provided on the second pipeline; A third pipeline is provided between the metering pump and the spinneret, and the first pressure measuring device is provided on the third pipeline; The second pressure measuring device is arranged at the liquid outlet of the spinneret filter.

7. The glue spraying pressure control system for spinneret of Lyocell fiber production according to claim 2, characterized in that: The heat exchanger is a shell and tube heat exchanger, a plate heat exchanger or a spiral plate heat exchanger.

8. The glue spraying pressure control system for spinneret of Lyocell fiber production according to claim 3, characterized in that: The metering pump is a reciprocating metering pump, a rotary metering pump, or a gear metering pump.

9. A method for controlling the glue spraying pressure of a spinneret for producing lyocell fiber, applied to the glue spraying pressure control of a spinneret for producing lyocell fiber as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: Measuring the pressure of the adhesive liquid entering the spinneret filter and the pressure of the adhesive liquid flowing out of the spinneret filter, obtaining the actual pressure value of the adhesive liquid entering and leaving the spinneret filter, and transmitting the actual pressure value of the adhesive liquid entering and leaving the spinneret filter; Receive the actual pressure value of the adhesive liquid entering and leaving the spinneret filter, and calculate the pressure difference of the adhesive liquid entering and leaving the spinneret filter; The pressure difference of the glue liquid entering and leaving the spinneret filter is compared with the preset pressure difference of the spinneret. When the pressure difference of the glue liquid entering and leaving the spinneret filter is not within the preset pressure difference range of the spinneret, a signal is transmitted to the temperature regulator, and the temperature regulator adjusts the water temperature in the spinneret to ensure that the pressure difference of the glue liquid entering and leaving the spinneret filter is maintained within the preset pressure difference range of the spinneret.

10. The method for controlling the glue spraying pressure of a spinneret for producing lyocell fibers according to claim 9, further characterized in that: The following steps are also included: Measure the pressure of the glue liquid entering the heat exchanger and the pressure of the glue liquid flowing out of the heat exchanger, obtain the actual pressure value of the glue liquid entering and leaving the heat exchanger, and transmit the actual pressure value of the glue liquid entering and leaving the heat exchanger; Receive the actual pressure value of the glue liquid entering and leaving the heat exchanger, and calculate the pressure difference of the glue liquid entering and leaving the heat exchanger; The pressure difference of the glue liquid entering and leaving the heat exchanger is compared with the preset pressure difference of the heat exchanger. When the pressure difference of the glue liquid entering and leaving the heat exchanger is not within the preset pressure difference range of the heat exchanger, a signal is transmitted to the temperature regulator, and the temperature regulator adjusts the water temperature in the heat exchanger to keep the pressure difference of the glue liquid entering and leaving the heat exchanger within the preset pressure difference range of the heat exchanger.

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