A spinning dope pressure control system and method for lyocell fiber production spinneret

Abstract

The application discloses a spinning plate glue injection pressure control system and method for producing lyocell fibers, wherein the spinning plate glue injection pressure control system for producing lyocell fibers comprises a spinning plate, a temperature regulator and a total controller, wherein the spinning plate comprises a spinning plate body and a spinning plate filter screen, the spinning plate filter screen is arranged on the spinning plate body and is in communication with the spinning plate body, a first pressure measuring device is arranged on the liquid inlet side of the spinning plate filter screen, and a second pressure measuring device is arranged on the liquid outlet side of the spinning plate filter screen; the temperature regulator is electrically connected with the spinning plate and can regulate the water temperature in the spinning plate; and the total controller is electrically connected with the first pressure measuring device, the second pressure measuring device and the temperature regulator. In this way, the pressure difference of the spinning plate can be maintained stable, the influence of glue viscosity change on production stability is further reduced, the broken ends are reduced, and the spinning quality is effectively improved.

Description

Technical Field

[0001] This invention belongs to the field of spinning equipment technology, and specifically relates to a pressure control system and method for spraying adhesive onto a spinneret in the production of lyocell fibers. Background Technology

[0002] With the widespread application of lyocell fiber, the market and customers have increasingly higher requirements for the quality stability of lyocell fiber. Through research on spinning process, combined with rheological knowledge and practical production experience, the inventors discovered that the stability of the viscosity of the spinneret solution has a very important impact on the quality of spinning.

[0003] The viscosity of the spinneret adhesive is mainly affected by the viscosity of the adhesive, the heat exchanger, and the spinneret insulation temperature. However, the degree of polymerization of the pulp in the adhesive is unstable; even pulp from the same batch can vary significantly. It is difficult to maintain a stable adhesive viscosity at a constant value for an extended period during the spinning process, thus making it difficult to ensure the stability of the adhesive viscosity at the spinneret. This can lead to spinneret breakage and disrupt stable production.

[0004] Therefore, how to reduce yarn breakage, ensure stable production, and effectively improve the quality of spinning production are technical problems that urgently need to be solved by those skilled in the art. Summary of the Invention

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

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

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A pressure control system for applying adhesive to a spinneret in lyocell fiber production includes:

[0009] A spinneret includes a spinneret body and a spinneret filter screen. The spinneret filter screen is disposed on the spinneret body and connected to the spinneret body. A first pressure measuring device is provided on the liquid inlet side of the spinneret filter screen, and a second pressure measuring device is provided on the liquid outlet side of the spinneret filter screen.

[0010] A temperature regulator is electrically connected to the spinneret and is capable of regulating the water temperature inside 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] Optional, also includes:

[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, which can regulate the water temperature inside the heat exchanger.

[0015] Both the third pressure measuring device and the fourth pressure measuring device are electrically connected to the main controller.

[0016] Optionally, a metering pump may also be included, which is disposed between the heat exchanger and the spinneret filter.

[0017] Optionally, the temperature regulator includes a first temperature regulator and a second temperature regulator, wherein 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 main controller includes:

[0019] A receiving module is used to receive the adhesive pressure values ​​of the first pressure measuring device and the second pressure measuring device, as well as the adhesive pressure values ​​of the third pressure measuring device and the fourth pressure measuring device;

[0020] The calculation module is used to calculate the actual pressure difference between the adhesive entering and exiting the spinneret filter and the actual pressure difference between the adhesive entering and exiting the heat exchanger.

[0021] The storage module is used to store the preset pressure values ​​of the spinneret and the heat exchanger.

[0022] The comparison module is used to compare the actual pressure difference of the adhesive entering and exiting the spinneret filter with the preset pressure value of the spinneret, and to compare the actual pressure difference of the adhesive entering and exiting the heat exchanger with the preset pressure value of the heat exchanger.

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

[0024] Optionally, the heat exchanger is provided with a first pipe at the liquid inlet, and the third pressure measuring device is installed on the first pipe;

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

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

[0027] The second pressure measuring device is located 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 adhesive spraying pressure of a spinneret in lyocell fiber production, applied to the adhesive spraying pressure control of a spinneret in lyocell fiber production as described in any of the above-mentioned methods, includes the following steps:

[0031] The pressure of the adhesive entering the spinneret filter and the pressure of the adhesive flowing out of the spinneret filter are measured to obtain the actual pressure values ​​of the adhesive entering and exiting the spinneret filter, and these actual pressure values ​​are transmitted.

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

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

[0034] Optionally, the following steps may also be included:

[0035] The pressure of the adhesive entering the heat exchanger and the pressure of the adhesive flowing out of the heat exchanger are measured to obtain the actual pressure values ​​of the adhesive entering and leaving the heat exchanger, and the actual pressure values ​​of the adhesive entering and leaving the heat exchanger are transmitted.

[0036] Receive the actual pressure values ​​of the adhesive liquid entering and exiting the heat exchanger, and calculate the pressure difference between the adhesive liquid entering and exiting the heat exchanger;

[0037] The pressure difference between the inlet and outlet of the adhesive liquid is compared with the preset pressure difference value of the heat exchanger. When the pressure difference between the inlet and outlet of the adhesive liquid is not within the range of the preset pressure difference value of the heat exchanger, a signal is transmitted to the temperature regulator. The temperature regulator adjusts the water temperature in the heat exchanger so that the pressure difference between the inlet and outlet of the adhesive liquid remains within the range of the preset pressure difference value of the heat exchanger.

[0038] As can be seen from the above technical solution, when the lyocell fiber spinneret glue spraying pressure control system is working, the first pressure measuring device measures the glue pressure entering the spinneret filter, and the second pressure measuring device measures the glue pressure flowing out of the spinneret filter to obtain the actual glue pressure value entering and exiting the spinneret filter. This signal is then transmitted to the main controller. The main controller receives the actual glue pressure value entering and exiting the spinneret filter and calculates the pressure difference. Then, the main controller compares this pressure difference with the preset pressure difference of the spinneret. When the pressure difference is outside the preset pressure difference range, the main controller transmits a signal to the temperature regulator, which adjusts the water temperature inside the spinneret to maintain the pressure difference within the preset range. This setup maintains a stable pressure difference on the spinneret, thereby further reducing the impact of changes in adhesive viscosity on production stability, reducing yarn breakage, and effectively improving the quality of spinning. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the adhesive spraying pressure control system for the spinneret in lyocell fiber production, provided in an embodiment of the present invention.

[0041] Explanation of reference numerals in the attached figures:

[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 Implementation

[0043] Currently, the market and customers have increasingly higher requirements for the quality stability of lyocell fibers. Through research on spinning processes, combined with rheological knowledge and practical production experience, the inventors discovered that the stability of the viscosity of the spinneret solution has a very important impact on the quality of spinning.

[0044] Further research by the inventors revealed that the pressure difference of the spinneret spraying adhesive is directly proportional to the viscosity of the adhesive solution exiting the spinneret. If the pressure difference of the spinneret spraying adhesive is stable, the viscosity of the adhesive solution exiting the spinneret will also be stable.

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

[0046] Another core aspect of this invention lies in providing a method for controlling the adhesive spraying pressure in spinnerets used in lyocell fiber production.

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] Please refer to Figure 1 The lyocell fiber production spinneret spraying pressure control system disclosed in this embodiment of the invention includes a spinneret 100, a temperature regulator, and a main controller 400. The spinneret 100 includes a spinneret body 101 and a spinneret filter 102. The spinneret filter 102 is disposed on and connected to the spinneret body 101. A first pressure measuring device 103 is provided on the liquid inlet side of the spinneret filter 102, and a second pressure measuring device 104 is provided on the liquid outlet side of the spinneret filter 102. The temperature regulator is electrically connected to the spinneret 100 and can regulate the water temperature inside the spinneret 100. The main controller 400 is electrically connected to the first pressure measuring device 103, the second pressure measuring device 104, and the temperature regulator.

[0049] When the lyocell fiber production spinneret adhesive spraying pressure control system is working, the first pressure measuring device 103 measures the adhesive pressure entering the spinneret filter 102, and the second pressure measuring device 104 measures the adhesive pressure flowing out of the spinneret filter 102, so as to obtain the actual adhesive pressure value entering and exiting the spinneret filter 102. This actual adhesive pressure value signal is transmitted to the main controller 400. The main controller 400 receives the actual adhesive pressure value entering and exiting the spinneret filter 102 and calculates the pressure of the adhesive entering and exiting the spinneret filter 102. The pressure difference of the adhesive entering and exiting the spinneret filter 102 is measured, and then the main controller 400 compares this pressure difference with the preset pressure difference of the spinneret. When the pressure difference is outside the preset range, the main controller 400 sends a signal to the temperature regulator, which adjusts the water temperature inside the spinneret 100 to maintain the pressure difference within the preset range. This setting maintains a stable pressure difference in the spinneret 100, further reducing the impact of adhesive viscosity changes on production stability, reducing yarn breakage, and effectively improving spinning quality.

[0050] As a further embodiment, the lyocell fiber production spinneret adhesive spraying pressure control system disclosed in this embodiment of the invention further 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, which can regulate the water temperature in the heat exchanger 500. The third pressure measuring device 501, the fourth pressure measuring device 502 and the heat exchanger 500 temperature regulator are all electrically connected to the main controller 400.

[0051] The third pressure measuring device 501 measures the pressure of the adhesive entering the heat exchanger 500, and the fourth pressure measuring device 502 measures the pressure of the adhesive flowing out of the heat exchanger 500, to obtain the actual pressure values ​​of the adhesive entering and exiting the heat exchanger 500. This signal is then transmitted to the main controller 400. The main controller 400 receives the actual pressure values ​​of the adhesive entering and exiting the heat exchanger 500, calculates the pressure difference between the adhesive entering and exiting the heat exchanger 500, and then sends the pressure difference data to the main controller. When the pressure difference between the inlet and outlet of the adhesive liquid in the heat exchanger 500 is not within the preset pressure difference value, the main controller 400 transmits a signal to the temperature regulator. The temperature regulator adjusts the water temperature in the heat exchanger 500 so that the pressure difference between the inlet and outlet of the adhesive liquid in the heat exchanger 500 remains within the preset pressure difference value. This setting can maintain the pressure difference of the heat exchanger 500, thereby further reducing the impact of adhesive viscosity changes on production stability, reducing yarn breakage, and effectively improving the quality of spinning.

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

[0053] It should be noted that there may be one or two temperature regulators. This embodiment of the invention does not impose a specific limitation on this, and those skilled in the art can choose according to the actual situation.

[0054] In a preferred embodiment, the temperature regulator disclosed in this 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. With this configuration, the first temperature regulator 200 and the second temperature regulator 300 do not affect each other; if one is damaged, it will not affect the normal operation of the other.

[0055] It should be noted that the main controller 400 includes a receiving module, a computing module, a storage module, a comparison module, and a transmission module.

[0056] The receiving module receives the adhesive pressure values ​​from the first pressure measuring device 103 and the second pressure measuring device 104, as well as the adhesive pressure values ​​from the third pressure measuring device 501 and the fourth pressure measuring device 502. The calculation module calculates the actual pressure difference between the adhesive entering and exiting the spinneret filter 102 and the actual pressure difference between the adhesive entering and exiting the heat exchanger 500. The storage module stores the preset pressure values ​​of the spinneret and the heat exchanger. The comparison module compares the actual pressure difference between the adhesive entering and exiting the spinneret filter 102 with the preset pressure value of the spinneret and compares the actual pressure difference between the adhesive entering and exiting the heat exchanger 500 with the preset pressure value of the heat exchanger. The transmission module transmits the comparison results obtained by the comparison module to the temperature regulator.

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

[0058] The specific structure of the heat exchanger 500 is not limited in the embodiments of the present invention. The heat exchanger 500 can be a shell and tube heat exchanger, a plate heat exchanger, a spiral plate heat exchanger, or of course, other types of heat exchangers. As long as the structure meets the requirements of the present invention, it is within the protection scope of the present invention. Those skilled in the art can choose according to the actual situation.

[0059] The specific structure of the metering pump 600 is not limited in the embodiments of the present invention. The metering pump 600 can be a reciprocating metering pump, a rotary metering pump, a gear metering pump, or of course, a metering pump with other structures. As long as the structure meets the requirements of the present invention, it is within the protection scope of the present invention. Those skilled in the art can choose according to the actual situation.

[0060] This invention discloses a method for controlling the adhesive spraying pressure of spinnerets in lyocell fiber production, applicable to the adhesive spraying pressure control of spinnerets in lyocell fiber production as described above, specifically including the following steps:

[0061] The pressure of the adhesive entering the spinneret filter 102 and the pressure of the adhesive flowing out of the spinneret filter 102 are measured to obtain the actual pressure value of the adhesive entering and exiting the spinneret filter 102, and the actual pressure value of the adhesive entering and exiting the spinneret filter 102 is transmitted.

[0062] Receive the actual pressure value of the adhesive liquid entering and exiting the spinneret filter 102, and calculate the actual pressure difference of the adhesive liquid entering and exiting the spinneret filter 102;

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

[0064] Specifically, the first pressure measuring device 103 measures the pressure of the adhesive entering the spinneret filter 102, and the second pressure measuring device 104 measures the pressure of the adhesive flowing out of the spinneret filter 102, so as to obtain the actual pressure value of the adhesive entering and exiting the spinneret filter 102. The actual pressure value signal of the adhesive entering and exiting the spinneret filter 102 is transmitted to the main controller 400. The main controller 400 receives the actual pressure value of the adhesive entering and exiting the spinneret filter 102 and calculates the amount of adhesive entering and exiting the spinneret filter 102. The main controller 400 compares the pressure difference of the liquid entering and exiting the spinneret filter 102 with the preset pressure difference value of the spinneret. When the pressure difference is outside the preset pressure difference range, the main controller 400 transmits a signal to the temperature regulator, which adjusts the water temperature inside the spinneret 100 to keep the pressure difference within the preset range. This setting maintains a stable pressure difference in the spinneret 100, further reducing the impact of liquid viscosity changes on production stability, reducing yarn breakage, and effectively improving spinning quality.

[0065] As a further embodiment, the method for controlling the adhesive spraying pressure of the spinneret 100 in the production of lyocell fiber disclosed in this embodiment of the invention further includes the following steps:

[0066] The pressure of the adhesive entering the heat exchanger 500 and the pressure of the adhesive flowing out of the heat exchanger 500 are measured to obtain the actual pressure values ​​of the adhesive entering and exiting the heat exchanger 500, and the actual pressure values ​​of the adhesive entering and exiting the heat exchanger 500 are transmitted.

[0067] Receive the actual pressure values ​​of the adhesive liquid entering and exiting the heat exchanger 500, and calculate the pressure difference between the adhesive liquid entering and exiting the heat exchanger 500.

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

[0069] Specifically, the third pressure measuring device 501 measures the pressure of the adhesive entering the heat exchanger 500, and the fourth pressure measuring device 502 measures the pressure of the adhesive flowing out of the heat exchanger 500, to obtain the actual pressure values ​​of the adhesive entering and exiting the heat exchanger 500. This signal is then transmitted to the main controller 400. The main controller 400 receives the actual pressure values ​​of the adhesive entering and exiting the heat exchanger 500, calculates the pressure difference between the adhesive entering and exiting the heat exchanger 500, and then sends the pressure difference data to the main controller. When the pressure difference between the inlet and outlet of the adhesive liquid in the heat exchanger 500 is not within the preset pressure difference value, the main controller 400 transmits a signal to the temperature regulator. The temperature regulator adjusts the water temperature in the heat exchanger 500 so that the pressure difference between the inlet and outlet of the adhesive liquid in the heat exchanger 500 remains within the preset pressure difference value. This setting can maintain the pressure difference of the heat exchanger 500, thereby further reducing the impact of adhesive viscosity changes on production stability, reducing yarn breakage, and effectively improving the quality of spinning.

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

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

[0072] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those 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 invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pressure control system for spraying adhesive onto spinnerets in lyocell fiber production, characterized in that, include: A spinneret includes a spinneret body and a spinneret filter screen. The spinneret filter screen is disposed on the spinneret body and connected to the spinneret body. A first pressure measuring device is provided on the liquid inlet side of the spinneret filter screen, and a second pressure measuring device is provided on the liquid outlet side of the spinneret filter screen. A temperature regulator is electrically connected to the spinneret and is capable of regulating the water temperature inside the spinneret. The main controller is electrically connected to the first pressure measuring device, the second pressure measuring device, and the temperature regulator, respectively. 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, which can regulate the water temperature inside the heat exchanger. Both the third pressure measuring device and the fourth pressure measuring device are electrically connected to the main controller.

2. The lyocell fiber production spinneret adhesive spraying pressure control system according to claim 1, characterized in that, It also includes a metering pump, which is disposed between the heat exchanger and the spinneret filter.

3. The lyocell fiber production spinneret adhesive spraying pressure control system according to claim 1, 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.

4. The lyocell fiber production spinneret adhesive spraying pressure control system according to claim 1, characterized in that, The main controller includes: A receiving module is used to receive the adhesive pressure values ​​of the first pressure measuring device and the second pressure measuring device, as well as the adhesive pressure values ​​of the third pressure measuring device and the fourth pressure measuring device; The calculation module is used to calculate the actual pressure difference between the adhesive entering and exiting the spinneret filter and the actual pressure difference between the adhesive entering and exiting the heat exchanger. The storage module is used to store the preset pressure values ​​of the spinneret and the heat exchanger. The comparison module is used to compare the actual pressure difference of the adhesive entering and exiting the spinneret filter with the preset pressure value of the spinneret, and to compare the actual pressure difference of the adhesive entering and exiting the heat exchanger with the preset pressure value of the heat exchanger. A transmission module is used to transmit the comparison result obtained by the comparison module to the temperature regulator.

5. The lyocell fiber production spinneret adhesive spraying pressure control system according to claim 2, characterized in that, The heat exchanger is provided with a first pipe on the liquid inlet side, and the third pressure measuring device is provided on the first pipe; A second pipe is provided between the heat exchanger and the metering pump, and the fourth pressure measuring device is provided on the second pipe; A third pipe is provided between the metering pump and the spinneret, and the first pressure measuring device is provided on the third pipe; The second pressure measuring device is located at the liquid outlet of the spinneret filter.

6. The lyocell fiber production spinneret adhesive spraying pressure control system according to claim 1, characterized in that, The heat exchanger is a shell-and-tube heat exchanger, a plate heat exchanger, or a spiral plate heat exchanger.

7. The lyocell fiber production spinneret adhesive spraying pressure control system according to claim 2, characterized in that, The metering pump is a reciprocating metering pump, a rotary metering pump, or a gear metering pump.

8. A method for controlling the adhesive spraying pressure of a spinneret in lyocell fiber production, applied to the adhesive spraying pressure control system for a spinneret in lyocell fiber production as described in any one of claims 1-7, characterized in that, Includes the following steps: The pressure of the adhesive entering the spinneret filter and the pressure of the adhesive flowing out of the spinneret filter are measured to obtain the actual pressure values ​​of the adhesive entering and exiting the spinneret filter, and these actual pressure values ​​are transmitted. Receive the actual pressure value of the adhesive entering and exiting the spinneret filter, and calculate the pressure difference of the adhesive entering and exiting the spinneret filter; The pressure difference between the liquid entering and exiting the spinneret filter is compared with the preset pressure difference of the spinneret. When the pressure difference between the liquid entering and exiting the spinneret filter is not within the range of the preset pressure difference of the spinneret, a signal is transmitted to the temperature regulator. The temperature regulator adjusts the water temperature in the spinneret so that the pressure difference between the liquid entering and exiting the spinneret filter is kept within the range of the preset pressure difference of the spinneret. It also includes the following steps: The pressure of the adhesive entering the heat exchanger and the pressure of the adhesive flowing out of the heat exchanger are measured to obtain the actual pressure values ​​of the adhesive entering and leaving the heat exchanger, and the actual pressure values ​​of the adhesive entering and leaving the heat exchanger are transmitted. Receive the actual pressure values ​​of the adhesive liquid entering and exiting the heat exchanger, and calculate the pressure difference between the adhesive liquid entering and exiting the heat exchanger; The pressure difference between the inlet and outlet of the adhesive liquid is compared with the preset pressure difference value of the heat exchanger. When the pressure difference between the inlet and outlet of the adhesive liquid is not within the range of the preset pressure difference value of the heat exchanger, a signal is transmitted to the temperature regulator. The temperature regulator adjusts the water temperature in the heat exchanger so that the pressure difference between the inlet and outlet of the adhesive liquid remains within the range of the preset pressure difference value of the heat exchanger.

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