CN112323149A - Spinneret plate cleaning process - Google Patents
Spinneret plate cleaning process Download PDFInfo
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- CN112323149A CN112323149A CN202011019009.9A CN202011019009A CN112323149A CN 112323149 A CN112323149 A CN 112323149A CN 202011019009 A CN202011019009 A CN 202011019009A CN 112323149 A CN112323149 A CN 112323149A
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D4/00—Spinnerette packs; Cleaning thereof
- D01D4/04—Cleaning spinnerettes or other parts of the spinnerette packs
Abstract
A spinneret plate cleaning process comprises the steps of firstly, cleaning a spinneret plate by using cleaning liquid, and removing the crust of a spinning solution on the surface; then soaking the fabric in a cleaning agent, and cleaning the fabric by using the cleaning agent; and then blowing and putting the mixture into a spinneret plate circulating cleaning system filled with a hot solvent bath for treatment and cleaning, and finally carrying out ultrasonic cleaning. The cleaning agent is soaked in the cleaning agent to clean dirt in spinneret holes, has a good cleaning effect on polymer stock solution, can decompose most materials on the surface of the spinneret plate, is put into a circulating cleaning system of a hot solvent bath to treat, boils and washes impurities on the surface of the spinneret plate, has better cleaning efficiency, does not damage the spinneret plate, and finally carries out ultrasonic cleaning on residues possibly existing on the surface of the spinneret plate. The process has the advantages of cleaning spinning holes, reducing the outflow resistance of spinning solution at the spinning holes and the quantity of fiber wool, reducing the damage to a spinneret plate and the like, and the detection qualified rate is more than 93%.
Description
Technical Field
The invention relates to a spinneret plate cleaning process, belongs to the technical field of spinneret plate cleaning in the chemical fiber industry, and particularly relates to the technical field of cleaning of wet spinning spinneret plates.
Background
In the process of producing fibers in the chemical fiber industry, a long and complicated process is generally needed, and a plurality of spinning devices, cleaning devices, high-temperature treatment devices and the like are needed in the process.
In the spinning process, the spinneret plate is used as a key device, the quality of the spinneret plate is directly related to the quality of a fiber product, like an alloy material with the diameter of 50-350 mm and the thickness of less than or equal to 10mm, which is used in wet spinning, thousands of or even tens of thousands of spinneret holes are distributed on the surface of the spinneret plate, the diameter of the spinneret holes is between dozens of micrometers and hundreds of micrometers, and thus, a large number of dense small holes cannot be observed by naked eyes at all. In the spinning process, raw material residues deposited on a spinneret plate accumulate day by day, and the phenomena of liquid leakage and hole plugging are easy to occur, so that the spinning process and the quality of fibers are influenced.
The cleaning method of the spinneret plate has various types, such as a calcining method, a solvent cleaning method, a vacuum hydrolysis method, an ultrasonic cleaning method, an alkaline bath method and the like, and the method is used singly, so that the cleaning time is usually too long, the cleaning effect is not good, and the calcining method has large damage to the spinneret plate and influences the service life and the spinning effect of the spinneret plate.
Patent CN201010161474.6 describes a method for cleaning a polyphenylene sulfide melt spinning spinneret, which combines organic solution cleaning, high temperature calcination and ultrasonic cleaning, and the method has a long high temperature calcination time, and may damage the surface of the spinneret and the inner wall of the spinneret hole, thereby affecting the service life of the spinneret and the fiber quality.
Disclosure of Invention
The invention aims to solve the problems that the spinneret plate is not cleaned completely in the cleaning process, so that the spinning solution flowing out resistance of spinneret plate spinning holes is large, and fiber broken filaments are increased, and the invention aims to provide a spinneret plate cleaning process, which can remove most of materials on the surface of the spinneret plate after being soaked in alkali liquor, but still can remove a part of polymer or organic impurities adhered to the holes of the spinneret plate, so that the spinneret plate is subjected to cooking and washing in a circulating cleaning system of a high-temperature solvent bath after being soaked in the alkali liquor, the cleaning in the self-made alkali liquor has high efficiency compared with the soaking of the spinneret plate in the solvent, and then the spinneret plate is subjected to cooking and washing in the hot solvent of the spinneret plate circulating cleaning system, compared with the cleaning in a high-temperature salt bath, the cleaning process can clean impurities remained in the holes of the spinneret plate and greatly reduce the damage to the spinneret plate, and the spinneret plate is placed, the number of the interlayers can be increased or decreased according to actual conditions, the solvent in the system is heated by steam heating, the high-temperature solvent has good dissolving and decomposing effects on materials (such as polymers or organic impurities) in the holes, and the booster centrifugal pump provides certain pressure for circulation of the hot solvent and has a better cleaning effect.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a spinneret plate cleaning process comprises the steps of firstly, cleaning a spinneret plate by using cleaning liquid, and removing the crust of a spinning solution on the surface; then soaking the fabric in a cleaning agent, and cleaning the fabric by using the cleaning agent; and then blowing, putting into a spinneret plate circulating cleaning system filled with a hot solvent bath for treatment, and finally carrying out ultrasonic cleaning.
The invention is further improved in that the cleaning solution is deionized water.
The invention is further improved in that the cleaning agent is alkali liquor.
In a further development of the invention, the lye is prepared by the following process: sodium hydroxide and ethanol were added to deionized water.
A further improvement of the invention is that the ratio of sodium hydroxide: ethanol: the mass of the deionized water is 1 (25-40) and 0.2-0.5.
The invention has the further improvement that the soaking time is 4-24 h.
The invention has the further improvement that the temperature of the hot solvent bath is 100-160 ℃, and the treatment time is 1-6 h.
In a further development of the invention, the solvent is N, N-dimethylformamide, N-dimethylacetamide, N-methylpyrrolidone or dimethylsulfoxide.
The invention has the further improvement that the spinneret plate circulating cleaning system comprises a shell, a booster centrifugal pump, a filter and a spray header, wherein a plurality of interlayers are arranged in the shell, a plurality of spray headers are arranged at the top in the shell, a steam inlet is formed in one side of the top of the shell, a steam outlet is formed in one side of the bottom of the shell, a solvent inlet is formed in the top of the shell, the solvent inlet is connected with the spray header, a solvent outlet is formed in the bottom of the shell, the solvent outlet is connected with the filter inlet through a second steam valve, the booster centrifugal pump and a third steam valve, and the filter outlet is connected with the.
The steam inlet is connected with the steam outlet, and the steam outlet is connected with the steam inlet.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the spinneret plate is soaked in the cleaning solution, all the crust is cleaned after the surface polymer stock solution is completely plasticized and crusted, and the cleaning of the crust is beneficial to the subsequent cleaning efficiency. And finally, carrying out ultrasonic cleaning on residues possibly existing on the surface of the spinneret plate, and aiming at cleaning the residues possibly existing on the surface of the spinneret plate. The process has the advantages of cleaning spinning holes, reducing the outflow resistance of spinning solution at the spinning holes and the quantity of fiber wool, along with low damage to a spinneret plate and the like. The detection qualification rate is over 93 percent, so that the spinneret plate can be cleaned more cleanly by the process, the damage of the spinneret plate is greatly reduced, and the service life is prolonged.
Drawings
Fig. 1 is a flow diagram of a spinneret plate cleaning process of the present invention.
Fig. 2 is a diagram of a spinneret circulation cleaning system.
Fig. 3 is a photograph of the holes of the comparative example spinneret after cleaning. Wherein, (a) is a picture of a hole after cleaning at one position on the spinneret, (b) is a picture of a hole after cleaning at another position on the spinneret, (c) is a picture of enlarging a hole at a position in the drawing (a), and (d) is a picture of enlarging a hole at a position in the drawing (b).
Fig. 4 is a photograph of the holes of the spinneret of the example after cleaning. Wherein (a) is a photograph of a cleaned hole at one location on the spinneret in example 4, (b) is a photograph of a cleaned hole at another location on the spinneret in example 4, (c) is a photograph of an enlarged hole at a location in fig. (a), and (d) is a photograph of an enlarged hole at a location in fig. (b).
In the figure, 1 is steam, 2 is a first steam valve, 3 is a second steam valve, 4 is a booster centrifugal pump, 5 is a filter, 6 is an interlayer, 7 is steam condensate, 8 is a spray header, 9 is a third steam valve, 10 is a fourth steam valve, and 11 is a fifth steam valve.
Detailed Description
The present invention will be described in detail below by way of examples with reference to the accompanying drawings.
Referring to fig. 1, a spinneret plate cleaning process includes the following steps:
(1) disassembling the spinneret plate assembly replaced on the production line, and preparing a spinneret plate to be washed;
(2) firstly, cleaning a spinneret plate by using a cleaning solution, and removing a surface spinning solution as much as possible;
(3) then soaking for a period of time by using a cleaning agent;
(4) cleaning the soaked spinneret plate with cleaning liquid;
(5) blowing the water-free water-drops by using compressed air;
(6) next, putting the spinneret plate into a circulating cleaning system of a hot solvent bath for treatment for a period of time;
(7) putting the spinneret plate in an ultrasonic cleaning machine for cleaning;
(8) blowing the spinneret plate by using compressed air, and then putting the spinneret plate into an oven for drying;
(9) and (3) detecting whether the spinneret plate is cleaned, if the spinneret plate is qualified, finishing cleaning, and if the spinneret plate is not qualified, repeating the cleaning process from (2) to (9) until the spinneret plate is qualified.
Preferably, in the step (1), attention is paid to avoiding collision and damage in the spinneret plate disassembling process.
Preferably, the cleaning solution in the step (2) is deionized water, and the spinning plate is adhered with a spinning solution to plasticize and crust in the deionized water, so that the surface crust is peeled off as much as possible.
Preferably, the cleaning agent in the step (3) is an alkali liquor, and the alkali liquor is prepared by the following steps: sodium hydroxide and ethanol were added to deionized water.
Preferably, the sodium hydroxide: ethanol: the mass of the deionized water is 1 (25-40) and 0.2-0.5.
Preferably, in the step (3), the soaking time is 4-24 h.
Preferably, the cleaning solution in the step (4) is deionized water.
Preferably, the purging method in the step (5) is to purge the front and back of the spinneret plate repeatedly, and the purging time is 2-5 min.
Preferably, the temperature of the hot solvent bath in the step (6) is 100-160 ℃, and the treatment time is 1-6 h. The solvent is N, N-dimethylformamide, N-dimethylacetamide, N-methylpyrrolidone or dimethyl sulfoxide, etc.
Preferably, the temperature of the ultrasonic cleaning machine in the step (7) is set to be 50-90 ℃, and the cleaning time is 10-60 min.
Preferably, the purging method in the step (8) is to purge the front and back of the spinneret plate repeatedly, and the purging time is 2-5 min.
Preferably, the temperature of the oven in the step (8) is set to be 50-120 ℃, and the drying time is 30-240 min.
Preferably, the detection method in the step (9) is firstly observed by naked eyes, and if no spinneret plate with obviously blocked holes exists, the detection is carried out under a microscopic examination instrument.
Preferably, the spinneret plate repeats the steps (2) to (9) until the spinneret plate is washed to be qualified, wherein obvious hole blockage is observed by naked eyes or the washing condition is found to be poor by detection under a microscopic examination instrument.
Referring to fig. 2, the spinneret circulation cleaning system includes a housing, an interlayer 6, a steam pipeline (which may be changed into electric heating according to circumstances), a centrifugal booster pump 4, a filter 5, a shower head 8 and other key structures, the housing is provided with a plurality of interlayers 6, the top is provided with a plurality of shower heads 8 in the housing, a steam inlet is provided on one side of the top of the housing, a steam outlet is provided on one side of the bottom of the housing, a solvent inlet is provided on the top of the housing, the solvent inlet is connected with the shower head 8, a solvent outlet is provided on the bottom of the housing, the solvent outlet is connected with the inlet of the filter 5 through a second steam valve 3, the centrifugal booster pump 4 and a third steam valve 9, and the outlet of the filter. Steam enters the steam inlet through the first steam valve 2, and steam discharged from the steam outlet is condensed into steam condensate 7 through the fifth steam valve 11. Putting the spinneret plates to be cleaned on the interlayer, wherein the spinneret plates are placed consistently as much as possible and have no accumulation condition, so that the situation that local positions cannot be cleaned is avoided; the steam has the functions of heating and heat preservation of the solvent in the system, the cleaning time is prolonged along with the increase of the interlayer, the temperature of the hot solvent sprayed from the spray header 8 is reduced, and the cleaning effect is influenced; the booster centrifugal pump 4 provides certain pressure for the system, firstly, the solvent for cleaning the spinneret plate is sent to the filter 5 to filter the cleaned materials, and then certain pressure is provided for the spraying of the solvent at the spray header 8, so that the cleaning effect of the hot solvent on the spinneret plate is improved; the filter 5 is used for filtering the cleaned materials, and the filtered solvent can be continuously recycled; the shower head 8 is a hot solvent ejection position. The temperature of the spinneret plate processing by the spinneret plate circulating cleaning system is 100-160 ℃, namely the temperature of the hot solvent, the time is 1-6 h, and the pressure provided by the booster centrifugal pump 4 is 0.5-2 MPa.
The following are specific examples.
Example 1
Disassembling a spinneret plate assembly replaced on a production line, firstly cleaning a spinneret plate with deionized water, plasticizing and skinning a spinning solution adhered to the spinneret plate in the deionized water, stripping the surface of the spinneret plate as much as possible, and soaking the cleaned spinneret plate in a prepared alkali liquor for 4 hours; and cleaning the soaked spinneret plate with deionized water, and then blowing the spinneret plate with compressed air until no water beads exist. Wherein the alkali liquor is prepared by the following steps: according to the weight ratio of sodium hydroxide: ethanol: adding sodium hydroxide and ethanol into deionized water according to the mass ratio of 1:25:0.2, and uniformly mixing.
And then putting the spinneret plate into a spinneret plate circulating cleaning system, treating for 2h by adopting a hot solvent with the temperature of 100 ℃, then putting the spinneret plate into an ultrasonic cleaning machine for cleaning, wherein the ultrasonic cleaning temperature is 50 ℃, the cleaning time is 30min, blowing the spinneret plate by using compressed air, then putting the spinneret plate into an oven for drying, the oven temperature is 90 ℃, the drying time is 120min, observing by naked eyes without plugging holes, and putting the spinneret plate under a microscopy instrument for detecting the cleaning condition.
Example 2
Disassembling a spinneret plate assembly replaced on a production line, firstly cleaning a spinneret plate with deionized water, plasticizing and skinning a spinning solution adhered to the spinneret plate in the deionized water, stripping the surface of the spinneret plate as much as possible, and soaking the cleaned spinneret plate in a prepared alkali liquor for 4 hours; and cleaning the soaked spinneret plate with deionized water, and then blowing the spinneret plate with compressed air until no water beads exist. Wherein the alkali liquor is prepared by the following steps: according to the weight ratio of sodium hydroxide: ethanol: adding sodium hydroxide and ethanol into deionized water according to the mass ratio of 1:40:0.3, and uniformly mixing.
And then putting the spinneret plate into a spinneret plate circulating cleaning system, treating for 3h by adopting a hot solvent with the temperature of 100 ℃, then putting the spinneret plate into an ultrasonic cleaning machine for cleaning, wherein the ultrasonic cleaning temperature is 50 ℃, the cleaning time is 30min, blowing the spinneret plate by using compressed air, then putting the spinneret plate into an oven for drying, the oven temperature is 90 ℃, the drying time is 120min, observing by naked eyes without plugging holes, and putting the spinneret plate under a microscopic examination instrument for detecting the cleaning condition.
Example 3
Disassembling a spinneret plate assembly replaced on a production line, firstly cleaning a spinneret plate with deionized water, plasticizing and skinning a spinning solution adhered to the spinneret plate in the deionized water, stripping the surface of the spinneret plate as much as possible, and soaking the cleaned spinneret plate in a prepared alkali liquor for 8 hours; and cleaning the soaked spinneret plate with deionized water, and then blowing the spinneret plate with compressed air until no water beads exist. Wherein the alkali liquor is prepared by the following steps: according to the weight ratio of sodium hydroxide: ethanol: adding sodium hydroxide and ethanol into deionized water according to the mass ratio of 1:30:0.4, and uniformly mixing.
And then putting the spinneret plate into a spinneret plate circulating cleaning system, treating for 2h by adopting a hot solvent with the temperature of 100 ℃, then putting the spinneret plate into an ultrasonic cleaning machine for cleaning, wherein the ultrasonic cleaning temperature is 50 ℃, the cleaning time is 30min, blowing the spinneret plate by using compressed air, then putting the spinneret plate into an oven for drying, the oven temperature is 90 ℃, the drying time is 120min, observing by naked eyes without plugging holes, and putting the spinneret plate under a microscopy instrument for detecting the cleaning condition.
Example 4
Disassembling a spinneret plate assembly replaced on a production line, firstly cleaning a spinneret plate with deionized water, plasticizing and skinning a spinning solution adhered to the spinneret plate in the deionized water, stripping the surface of the spinneret plate as much as possible, and soaking the cleaned spinneret plate in a prepared alkali liquor for 8 hours; and cleaning the soaked spinneret plate with deionized water, and then blowing the spinneret plate with compressed air until no water beads exist. Wherein the alkali liquor is prepared by the following steps: according to the weight ratio of sodium hydroxide: ethanol: adding sodium hydroxide and ethanol into deionized water according to the mass ratio of 1:35:0.5, and uniformly mixing.
And then putting the spinneret plate into a spinneret plate circulating cleaning system, treating for 2h by adopting a 150 ℃ hot solvent, then putting the spinneret plate into an ultrasonic cleaning machine for cleaning, wherein the ultrasonic cleaning temperature is 50 ℃, the cleaning time is 30min, blowing the spinneret plate by using compressed air, then putting the spinneret plate into an oven for drying, the oven temperature is 90 ℃, the drying time is 120min, observing by naked eyes without plugging holes, and putting the spinneret plate under a microscopy instrument for detecting the cleaning condition.
Example 5
Disassembling a spinneret plate assembly replaced on a production line, firstly cleaning a spinneret plate with deionized water, plasticizing and skinning a spinning solution adhered to the spinneret plate in the deionized water, stripping the surface of the spinneret plate as much as possible, and soaking the cleaned spinneret plate in a prepared alkali liquor for 10 hours; and cleaning the soaked spinneret plate with deionized water, and then blowing the spinneret plate with compressed air until no water beads exist. Wherein the alkali liquor is prepared by the following steps: according to the weight ratio of sodium hydroxide: ethanol: adding sodium hydroxide and ethanol into deionized water according to the mass ratio of 1:40:0.2, and uniformly mixing.
And then putting the spinneret plate into a spinneret plate circulating cleaning system, treating for 3h by adopting a hot solvent with the temperature of 100 ℃, then putting the spinneret plate into an ultrasonic cleaning machine for cleaning, wherein the ultrasonic cleaning temperature is 50 ℃, the cleaning time is 30min, blowing the spinneret plate by using compressed air, then putting the spinneret plate into an oven for drying, the oven temperature is 90 ℃, the drying time is 120min, observing by naked eyes without plugging holes, and putting the spinneret plate under a microscopic examination instrument for detecting the cleaning condition.
Example 6
Disassembling a spinneret plate assembly replaced on a production line, firstly cleaning a spinneret plate with deionized water, plasticizing and skinning a spinning solution adhered to the spinneret plate in the deionized water, stripping the surface of the spinneret plate as much as possible, and soaking the cleaned spinneret plate in a prepared alkali liquor for 10 hours; and cleaning the soaked spinneret plate with deionized water, and then blowing the spinneret plate with compressed air until no water beads exist. Wherein the alkali liquor is prepared by the following steps: according to the weight ratio of sodium hydroxide: ethanol: adding sodium hydroxide and ethanol into deionized water according to the mass ratio of 1:32:0.3, and uniformly mixing.
And then putting the spinneret plate into a spinneret plate circulating cleaning system, treating for 2h by adopting a hot solvent with the temperature of 100 ℃, then putting the spinneret plate into an ultrasonic cleaning machine for cleaning, wherein the ultrasonic cleaning temperature is 50 ℃, the cleaning time is 30min, blowing the spinneret plate by using compressed air, then putting the spinneret plate into an oven for drying, the oven temperature is 90 ℃, the drying time is 120min, observing by naked eyes without plugging holes, and putting the spinneret plate under a microscopy instrument for detecting the cleaning condition.
Example 7
Disassembling a spinneret plate assembly replaced on a production line, firstly cleaning a spinneret plate with deionized water, plasticizing and skinning a spinning solution adhered to the spinneret plate in the deionized water, stripping the surface of the spinneret plate as much as possible, and soaking the cleaned spinneret plate in a prepared alkali liquor for 4 hours; and cleaning the soaked spinneret plate with deionized water, and then blowing the spinneret plate for 2min by using compressed air until no water beads exist. Wherein the alkali liquor is prepared by the following steps: according to the weight ratio of sodium hydroxide: ethanol: adding sodium hydroxide and ethanol into deionized water according to the mass ratio of 1:32:0.3, and uniformly mixing.
And then putting the spinneret plate into a spinneret plate circulating cleaning system, treating for 1h by adopting a hot solvent at 100 ℃, then putting the spinneret plate into an ultrasonic cleaning machine for cleaning, wherein the ultrasonic cleaning temperature is 90 ℃, the cleaning time is 10min, blowing the spinneret plate by using compressed air, then putting the spinneret plate into an oven for drying, the oven temperature is 50 ℃, the drying time is 240min, observing by naked eyes without plugging holes, and putting the spinneret plate under a microscopic examination instrument for detecting the cleaning condition.
Example 8
Disassembling a spinneret plate assembly replaced on a production line, firstly cleaning a spinneret plate with deionized water, plasticizing and skinning a spinning solution adhered to the spinneret plate in the deionized water, stripping the surface of the spinneret plate as much as possible, and soaking the cleaned spinneret plate in a prepared alkali liquor for 24 hours; and cleaning the soaked spinneret plate with deionized water, and then blowing the spinneret plate for 5min by using compressed air until no water beads exist. Wherein the alkali liquor is prepared by the following steps: according to the weight ratio of sodium hydroxide: ethanol: adding sodium hydroxide and ethanol into deionized water according to the mass ratio of 1:32:0.3, and uniformly mixing.
And then putting the spinneret plate into a spinneret plate circulating cleaning system, treating for 4h by adopting a 140-DEG C hot solvent, then putting the spinneret plate into an ultrasonic cleaning machine for cleaning, wherein the ultrasonic cleaning temperature is 50 ℃, the cleaning time is 60min, blowing the spinneret plate by using compressed air, then putting the spinneret plate into an oven for drying, wherein the oven temperature is 70 ℃, the drying time is 180min, observing by naked eyes without plugging holes, and putting the spinneret plate under a microscopy instrument for detecting the cleaning condition.
Example 9
Disassembling a spinneret plate assembly replaced on a production line, firstly cleaning a spinneret plate with deionized water, plasticizing and skinning a spinning solution adhered to the spinneret plate in the deionized water, stripping the surface of the spinneret plate as much as possible, and soaking the cleaned spinneret plate in a prepared alkali liquor for 15 hours; and cleaning the soaked spinneret plate with deionized water, and then blowing the spinneret plate for 4min by using compressed air until no water drops exist. Wherein the alkali liquor is prepared by the following steps: according to the weight ratio of sodium hydroxide: ethanol: adding sodium hydroxide and ethanol into deionized water according to the mass ratio of 1:32:0.3, and uniformly mixing.
And then putting the spinneret plate into a spinneret plate circulating cleaning system, treating for 6 hours by using a hot solvent at 160 ℃, then putting the spinneret plate into an ultrasonic cleaning machine for cleaning, wherein the ultrasonic cleaning temperature is 70 ℃, the cleaning time is 40min, blowing the spinneret plate by using compressed air, then putting the spinneret plate into an oven for drying, the oven temperature is 120 ℃, the drying time is 30min, observing by naked eyes without plugging holes, and putting the spinneret plate under a microscopy instrument for detecting the cleaning condition.
Comparative example
The method comprises the following steps of disassembling a spinneret plate assembly replaced on a production line, firstly cleaning a spinneret plate by using deionized water, plasticizing and skinning a spinning solution adhered to the spinneret plate in the deionized water, and stripping the surface skinning of the spinneret plate as far as possible.
And then putting the spinneret plate into a solvent bath to be soaked for 24h, then putting the spinneret plate into an ultrasonic cleaning machine to be cleaned, blowing the spinneret plate by using compressed air at the ultrasonic cleaning temperature of 50 ℃ for 30min, then putting the spinneret plate into an oven to be dried, wherein the oven temperature is 90 ℃, the drying time is 120min, observing the spinneret plate by naked eyes without plugging holes, and detecting the cleaning condition under a microscopic examination instrument.
The cleaning results of the cleaned spinnerets in the examples and the comparative examples under a microscopic examination instrument are as follows:
table 6 comparison of spinneret plate test results in examples and 2 comparative examples
The detection conditions set by the microscopic examination instrument are that the dirt proportion is less than or equal to 0.5 percent, the roundness is greater than or equal to 90 percent (the roundness is defined as measuring the area of a spinneret orifice/measuring the calculated area of the maximum diameter of the spinneret orifice), the dirt proportion mainly represents the cleaning effect of the spinneret plate, and the roundness mainly represents the integrity of the orifice and can also reflect the cleaning condition of the orifice.
The spinneret plate to be cleaned is placed on the interlayer during working, the number of layers can be selected according to requirements by the interlayer, the system heats a solvent to a certain temperature in a steam or electric heating mode, certain cleaning pressure is provided for the circulating cleaning system through the booster centrifugal pump, so that the spinneret plate has better cleaning efficiency in the system, and the spinneret plate is not damaged.
After the cleaning agent is soaked in the alkali liquor, the cleaning agent is treated in a circulating cleaning system of a hot solvent bath, and the cleaning effect of the embodiment is obviously improved compared with that of a comparative example, referring to (a), (b), (c) and (d) in a figure 3 and (a), (b), (c) and (d) in a figure 4, the cleaning effect of the spinneret plate in the embodiment and the comparative example is detected under a microscopic examination instrument, and the qualified rate of the spinneret plate treated by the alkali liquor soaking and the hot solvent bath in the circulating cleaning system is more than 93%. The process of the invention not only can clean the spinneret plate more cleanly, but also greatly reduces the damage of the spinneret plate and prolongs the service life.
Claims (10)
1. A spinneret plate cleaning process is characterized in that firstly, cleaning liquid is adopted to clean a spinneret plate, and surface spinning solution crust is removed; then soaking the fabric in a cleaning agent, and cleaning the fabric by using the cleaning agent; and then blowing, putting into a spinneret plate circulating cleaning system filled with a hot solvent bath for treatment, and finally carrying out ultrasonic cleaning.
2. The spinneret plate cleaning process according to claim 1, wherein the cleaning solution is deionized water.
3. The spinneret plate cleaning process according to claim 1, wherein the cleaning agent is an alkali solution.
4. The spinneret plate cleaning process according to claim 3, wherein the lye is prepared by: sodium hydroxide and ethanol were added to deionized water.
5. The spinneret plate cleaning process according to claim 4, wherein the ratio of sodium hydroxide: ethanol: the mass of the deionized water is 1 (25-40) and 0.2-0.5.
6. The spinneret plate cleaning process according to claim 1, wherein the soaking time is 4-24 hours.
7. The spinneret plate cleaning process according to claim 1, wherein the temperature of the hot solvent bath is 100-160 ℃ and the treatment time is 1-6 h.
8. The spinneret plate cleaning process according to claim 1, wherein the solvent is N, N-dimethylformamide, N-dimethylacetamide, N-methylpyrrolidone or dimethylsulfoxide.
9. The spinneret plate cleaning process according to claim 1, wherein the spinneret plate circulating cleaning system comprises a shell, a booster centrifugal pump (4), a filter (5) and a spray header (8), a plurality of interlayers (6) are arranged in the shell, a plurality of spray headers (8) are arranged at the top in the shell, a steam inlet is formed in one side of the top of the shell, a steam outlet is formed in one side of the bottom of the shell, a solvent inlet is formed in the top of the shell, the solvent inlet is connected with the spray header (8), a solvent outlet is formed in the bottom of the shell, the solvent outlet is connected with an inlet of the filter (5) through a second steam valve (3), the booster centrifugal pump (4) and a third steam valve (9), and an outlet of the filter (5) is connected with the solvent inlet through a.
10. A spinneret plate cleaning process according to claim 9 wherein steam enters the steam inlet through the first steam valve (2) and steam exiting the steam outlet is condensed into the steam condensate (7) through the fifth steam valve (11).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114054423A (en) * | 2021-09-08 | 2022-02-18 | 中复神鹰碳纤维股份有限公司 | Automatic spinneret plate cleaning method and device |
| CN115161780A (en) * | 2022-08-25 | 2022-10-11 | 山东鸿泰鼎新材料科技有限公司 | Cleaning process method of lyocell fiber spinning spinneret plate |
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| CN114054423A (en) * | 2021-09-08 | 2022-02-18 | 中复神鹰碳纤维股份有限公司 | Automatic spinneret plate cleaning method and device |
| CN115161780A (en) * | 2022-08-25 | 2022-10-11 | 山东鸿泰鼎新材料科技有限公司 | Cleaning process method of lyocell fiber spinning spinneret plate |
| CN115161780B (en) * | 2022-08-25 | 2024-02-02 | 山东鸿泰鼎新材料科技有限公司 | Cleaning process method of lyocell fiber spinning spinneret plate |
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