CN108048927B - Energy-saving cooling device and energy-saving cooling method for fiber spinning - Google Patents
Energy-saving cooling device and energy-saving cooling method for fiber spinning Download PDFInfo
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- CN108048927B CN108048927B CN201711374889.XA CN201711374889A CN108048927B CN 108048927 B CN108048927 B CN 108048927B CN 201711374889 A CN201711374889 A CN 201711374889A CN 108048927 B CN108048927 B CN 108048927B
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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
- D01D13/00—Complete machines for producing artificial threads
- D01D13/02—Elements of machines in combination
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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
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Abstract
The invention belongs to the field of chemical fiber production and spinning, and particularly relates to an energy-saving cooling device and an energy-saving cooling method for fiber spinning, which comprise a spinning device, a blowing system and a recovery processing system, wherein the blowing system blows air to tows sprayed by the spinning device to cool the tows, and the recovery processing system is used for recovering and/or processing cooling air blown to the tows by the blowing system; in addition, because of the diffusion of the solvent, the wind contains a certain amount of solvent, and the recovered wind is treated to recover the solvent, so that the pollution is reduced and the energy is saved.
Description
Technical Field
The invention belongs to the field of chemical fiber production and spinning, and particularly relates to an energy-saving cooling device and an energy-saving cooling method for fiber spinning.
Background
According to the definition of the International Bureau of rayon and synthetic fiber, natural cellulose is used as a raw material, and an organic solvent is used to directly dissolve cellulose fibers prepared by a spinning process, which are known as Lyocell (Lyocell) fibers, and now commonly refer to NMMO (N-methylmorpholine-N-oxide) solvent-method regenerated cellulose fibers. Lyocell (Lyocell) fiber is a new regenerated cellulose fiber which is industrially produced at the end of the 20 th century and is prepared by directly dissolving a natural cellulose raw material in a mixed solvent of NMMO and water and spinning the mixture by a dry-wet method, and is also called a new solvent method cellulose fiber.
In the process of spinning and forming cellulose fibers by a solvent method and a dry-jet wet method, spinning streams are cooled by blowing air at a certain temperature and humidity, the control of the air temperature, the wind speed and the wind speed of the blowing air is particularly important, the forming process of tows is directly influenced, the tows can be broken under the condition of no blowing air, and the tensile property of the tows is gradually improved along with the increase of the wind speed. Therefore, the air gap blowing equipment matched with the spinning part is developed, the uniformity of an air field is realized, and the uniformity of the formed tows is ensured.
The present invention has been made in view of this situation.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art, and provide an energy-saving cooling device and an energy-saving cooling method for fiber spinning, wherein a recovery processing system is arranged to recycle cooling air blown to tows by a blowing system, so that the cost can be saved; in addition, because of the diffusion of the solvent, the wind contains a certain amount of solvent, and the recovered wind is treated to recover the solvent, so that the pollution is reduced and the energy is saved.
In order to solve the technical problems, the invention adopts the technical scheme that:
the energy-saving cooling device for fiber spinning comprises a spinning device, a blowing system and a recovery processing system, wherein the blowing system blows air to tows sprayed by the spinning device to cool the tows, and the recovery processing system is used for recovering and/or processing the cooling air blown to the tows by the blowing system.
The recycling treatment system comprises a spraying device, an air suction pipeline and an exhaust pipeline, wherein the air suction pipeline and the exhaust pipeline are communicated with the spraying device, air after heat exchange with the tows enters the spraying device through the air suction pipeline and is discharged from the exhaust pipeline after being sprayed and absorbed;
preferably, the spraying device comprises a box body, a sprayer arranged in the box body and a water supply pipeline communicated with the sprayer, the air suction pipeline and the exhaust pipeline are communicated with the box body, and an air inlet of the air suction pipeline is opposite to the tows.
The air outlet of the exhaust pipeline is communicated with the air inlet end of the blowing system, and the air passing through the spraying device is guided into the blowing system;
preferably, a rotating mechanism is arranged on the box body, and the sprayer is connected to the rotating mechanism, so that the spraying direction of the sprayer can be changed;
more preferably, the sprayer comprises at least one spray head, a spray filter screen for filtering water in the water supply pipeline is installed in the spray head, and the aperture of the mesh of the filter screen is 100-300 μm.
The recovery processing system also comprises a collecting device, wherein the collecting device is communicated with the spraying device and is used for collecting and recovering the absorption liquid in the spraying device;
preferably, an overflow port is arranged on the spraying device, the collecting device is communicated with the overflow port through a pipeline, and the sprayed liquid enters the collecting device through the overflow port.
The blowing system comprises a fan and an air outlet device for blowing air to the tows, and the air outlet end of the fan is communicated with the air outlet device through an air supply pipeline;
preferably, the air inlet end of the fan is communicated with the recovery processing system;
more preferably, the air inlet end of the fan is communicated with the air outlet of the exhaust pipeline.
The air supply pipeline is provided with a reducing section with a reduced inner diameter and used for increasing the air speed in the air supply pipeline;
preferably, the pipe diameter of the air supply pipeline is locally reduced inwards to form a reducing section with a reduced inner diameter.
The blowing system also comprises a pressure stabilizing device and a filter which are arranged on the blast pipeline, the pressure stabilizing device is arranged at the downstream of the reducing section and is communicated with the blast pipeline, the filter is arranged in the blast pipeline and is positioned at the downstream of the pressure stabilizing device, a first uniform distributor is arranged in the pressure stabilizing device, and a second uniform distributor is arranged in the air outlet device;
preferably, the pressure stabilizing device is provided with a pressure stabilizing cavity, the pressure stabilizing cavity is communicated with the air supply pipeline, and the first uniform distributor is arranged in the pressure stabilizing cavity.
The air outlet device comprises a body with an inner cavity, a transmission device and an air blowing window, the air blowing window is communicated with the inner cavity to guide cooling air out, and the transmission device is arranged on the body and controls the air blowing window to move or rotate;
preferably, the blowing windows are blowing tubes or blowing slits;
more preferably, the blowing tubes are circular, and the blowing slits are long-strip-shaped;
more preferably, the tube diameter of the blowing array tube is 1.5-5.0 mm, the number of the array tube rows is 2-4, and the slit height of the blowing slit is 1.0-5.0 mm.
An energy-saving cooling method for cellulose fiber spinning comprises the following steps: the energy-saving cooling device is adopted to cool the tows sprayed by the spinning device, and the blowing air quantity is controlled to be 40-200 m3The air blowing speed is 5-60 m/s, the air blowing temperature is 3-20 ℃, the relative humidity is 20-80%, and the air gap height is 10-60 mm;
preferably, the blowing air volume is 60-150 m3The air blowing speed is 15-35 m/s, the air blowing temperature is 5-18 ℃, the relative humidity is 30-70%, and the air gap height is 15-40 mm;
more preferably, the blowing air volume is 80-120 m3The air blowing speed is 20-30 m/s, the air blowing temperature is 8-15 ℃, the relative humidity is 40-65%, and the air gap height is 20-30 mm.
The spinning device performs spinning on cellulose fiber spinning stock solution prepared by a solvent method, and the transmission device is used for adjusting the distance between the blowing window and the spinning holes of the spinning device, so that the distance between the blowing window and the spinning holes of the spinning device is 3-40 mm;
preferably, the distance between the blowing window and a spinneret orifice of the spinneret device is 5-15 mm;
more preferably, the distance between the blowing window and the spinneret orifice of the spinneret device is 6-10 mm.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
1. the recovery processing system is arranged, so that cooling air blown to the tows by the blowing system is recycled, and the cost can be saved; in addition, because of the diffusion of the solvent, the wind contains a certain amount of solvent, and the recovered wind is treated to recover the solvent, so that the pollution is reduced and the energy is saved;
2. the solvent is absorbed by water to purify the air by spraying before the air is introduced into the blowing system, and the temperature of the air is greatly reduced after the recovered air passes through the spraying device, so that the humidity is more suitable for secondary utilization and enters the blowing system;
3. by arranging the reducer section, the low speed and the low air volume provided by the fan are realized, the energy consumption is reduced, and the cost is saved;
4. because the cooling air is compressed when entering the reducer section, turbulence is easy to occur, so that the gas is not uniform in the pipeline, and the first uniform distributor, the pressure stabilizing cavity, the filter and the second uniform distributor are sequentially arranged behind the reducer section, so that the cooling air is more uniform and stable, and the influence on the tows is reduced.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a schematic view of a blowing system according to the present invention;
FIG. 2 is a schematic structural diagram of the energy-saving cooling device of the present invention.
In the figure: 1. the spinning device 2, the spraying device 3, the air suction pipeline 4, the exhaust pipeline 5, the box body 6, the sprayer 7, the water supply pipeline 8, the filament bundle 9, the rotating mechanism 10, the spraying head 11, the spraying filter screen 12, the overflow port 13, the collecting device 14, the fan 15, the air outlet device 16, the air supply pipeline 17, the diameter-changing section 18, the pressure stabilizer 19, the first uniform distributor 20, the filter 21, the second uniform distributor 22, the pressure stabilizing cavity 23, the body 24, the transmission device 25, the air blowing window 26, the spinneret plate 27, the manual rocker 28, the dehumidifier 50, the air inlet 51 of the air suction pipeline, and the air outlet of the exhaust pipeline
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
Example one
As shown in fig. 1-2, an energy-saving cooling device for fiber spinning comprises a spinning device 1, an air blowing system and a recovery processing system, wherein the air blowing system blows air to tows 8 sprayed by the spinning device 1 to cool the tows 8, and the recovery processing system is used for recovering and/or processing the cooling air blown to the tows 8 by the air blowing system.
When the solvent method is adopted for producing the cellulose fiber spinning, the solvent (generally NMMO) has certain volatility, especially when the tows sprayed by the spinning device 1 are subjected to air cooling, a part of the solvent can be taken away by cooling air, so that the environment around the tows 8 is severe, and the solvent is wasted at the same time, because the cooling air needs to be cooled before being blown out, the cooling effect can be improved, although the cooling air blown out by the blowing system exchanges heat with the tows 8 to increase the temperature of the tows 8, because the air volume is larger, the temperature of the air after heat exchange is lower than that of the air around, the cooling air blown to the tows 8 by the blowing system is recycled by arranging the recycling system, and the cost can be saved; in addition, because of the diffusion of the solvent, the wind contains a certain amount of solvent, and the recovered wind is treated to recover the solvent, so that the pollution is reduced and the energy is saved.
Further, the recovery processing system includes spray set 2, aspiration channel 3 and exhaust pipe way 4 all communicate with spray set 2, and the wind that carries out the heat exchange with silk bundle 8 is inhaled spray set 2 by aspiration channel 3, discharges from exhaust pipe way 4 after spraying the absorption. By arranging the spraying device 2, the solvent (NMMO) is dissolved in water, and the air entering the recovery processing system is sprayed and processed, so that the solvent (NMMO) is dissolved in water and recovered, and the function of purifying the air is achieved.
Wherein, spray set 2 includes box 5, sets up spray thrower 6 in box 5 and the water supply pipe 7 with spray thrower 6 intercommunication, and aspiration channel 3 and exhaust duct 4 all communicate with box 5, the air intake 50 of aspiration channel 3 is relative with silk bundle 8. The water supply line 7 supplies water to the shower 6, and the shower 6 sprays water to absorb the solvent (NMMO).
Further, the air outlet 51 of the exhaust duct is communicated with the air inlet end of the blowing system, so that the air passing through the spraying device 2 is guided into the blowing system. Because the wind that blast system blew out is when carrying out heat exchange with silk bundle 8, the temperature of wind risees, and direct leading-in blast system can reduce cooling effect, sprays through leading-in blast system with wind, makes the solvent absorbed by water on the one hand, purifies wind, and on the other hand, the wind of retrieving is behind spray set 2, the temperature greatly reduced of wind, and the reutilization that its humidity is more suitable gets into blast system. The recovery processing system is used for recovering residual solvent NMMO in the cooling air and recovering the cross air used for cooling the filament bundle so as to improve the recovery rate of the solvent and reduce the energy consumption of a compressor in the air blowing system.
Furthermore, a rotating mechanism 9 is arranged on the box body 5, and the sprayer 6 is connected to the rotating mechanism 9, so that the spraying direction of the sprayer 6 can be changed.
Through setting up slewing mechanism 9, make spray thrower 6 can multi-direction spray in the case, the cooling absorption effect is better.
The rotating mechanism 9 may be an electric control rotating mechanism or a mechanical rotating mechanism.
The rotating mechanism 9 comprises a base and a rotating head, the base is connected with the box body 5, the rotating head is connected with the spherical surface of the base, the sprayer 6 is connected onto the rotating head and rotates 360 degrees without dead angles along with the rotating head, and meanwhile, the spraying device 2 further comprises an electric controller which is electrically connected with the rotating head and controls the rotating head to rotate.
Further, the sprayer 6 comprises at least one spray head 10, a spray filter screen 11 for filtering water in the water supply pipeline 7 is installed in the spray head 10, and the aperture of the mesh of the filter screen is 100-300 microns. By providing a plurality of shower heads 10, the absorption area and the absorption efficiency are improved. Through setting up and spraying filter screen 11, filter, the distribution to the water that sprays the in-process, spun is more even. The aperture of the mesh of the filter screen is 100-300 mu m, and impurities in water can be filtered.
Further, the recovery processing system further comprises a collecting device 13, the collecting device 13 is provided with a containing cavity, and the collecting device 13 is communicated with the containing cavity of the spraying device 2 and used for collecting and recovering the absorption liquid in the spraying device 2. By arranging the collecting device 13, the water which has absorbed the solvent is discharged into the collecting device 13, and then the water in the collecting device 13 is treated to obtain the solvent through subsequent post-treatment, so that the solvent is recycled.
Furthermore, an overflow port 12 is arranged on the spraying device 2, the collecting device 13 is communicated with the overflow port 12 through a pipeline, and the sprayed liquid enters the collecting device 13 through the overflow port 12. After reaching a certain height, the liquid in the spraying device 2 flows into the collecting device 13.
Further, be equipped with circulation pipeline between collection device 13 and spray set 2, circulation pipeline's feed liquor end and collection device 13's lower part intercommunication, upper portion and spray set 2 supply channel 7 intercommunication, the water economy on the one hand, on the other hand reaches the function that constantly improves solvent concentration, more energy saving.
Or, the end of intaking of circulating line communicates with spray set 2's lower part, and upper portion communicates with spray set 2 water supply pipe 7, through setting up circulating line, realizes absorbing the circulation of liquid in spray set 2, and water economy on the one hand, on the other hand reaches the function that constantly improves solvent concentration, the more energy saving.
Further, the blowing system comprises a fan 14 and an air outlet device 15 for blowing air to the tows 8, and an air outlet end of the fan 14 is communicated with the air outlet device 15 through an air supply pipeline 16. Through setting up fan 14 and air-out device 15, the realization is blown the cooling wind to silk bundle 8, cools off silk bundle 8.
Further, the air inlet end of the fan 14 is communicated with a recovery processing system, and the cooling air is recovered and reused by the structure through the recovery processing system, so that the purpose of saving energy is achieved.
Wherein, the air inlet end of the fan 14 is communicated with the air outlet 51 of the exhaust pipeline.
Further, the air supply pipeline 16 is provided with a reducing section 17 with a reduced inner diameter, and the reducing section is used for increasing the air speed in the air supply pipeline 16, and the function of increasing the air speed and the air volume is realized through the change of the structure, so that the power of the fan 14 can be set to be relatively small, and the cost is saved.
Wherein, the pipe diameter of the air supply pipeline 16 is locally reduced inwards to form a reducing section 17 with reduced inner diameter. The spinning can be smoothly carried out under the condition of smaller air supply volume, and the energy consumption in the actual production process is effectively reduced.
Further, the blowing system also comprises a pressure stabilizing device 18 and a filter 20 which are arranged on the air supply pipeline 16, the pressure stabilizing device 18 is arranged at the downstream of the reducing section 17 and is communicated with the air supply pipeline 16, the filter 20 is arranged in the air supply pipeline 16 and is positioned at the downstream of the pressure stabilizing device 18, a first uniform distributor 19 is arranged in the pressure stabilizing device 18, and a second uniform distributor 21 is arranged in the air outlet device 15.
The pressure stabilizer 18 is arranged on the air supply pipeline 16 and is positioned at the downstream of the reducing section 17, and the pressure stabilizer 18 is communicated with the air supply pipeline 16 to stably improve the air speed and the air volume of the cooling air. Through setting up first equipartition ware 19, the wind that will get into pressure stabilizer 18 carries out the equipartition, realizes faster steady voltage, through setting gradually first equipartition ware 19, pressure stabilizer 18, filter 20 and second equipartition ware 21, realizes the wind after the acceleration equipartition earlier, the steady voltage, filters again, carries out further equipartition to wind before the air-out at last, realizes that the homogeneous of air-out is stable, reduces tow 8's broken end, caking, improves air-cooled effect.
The pressure stabilizing device 18 is provided with a pressure stabilizing cavity 22, the pressure stabilizing cavity 22 is communicated with the air supply pipeline 16, and the first uniform distributor 19 is arranged in the pressure stabilizing cavity 22.
The sectional area of the pressure stabilizing cavity 22 is larger than the diameter of the air supply short circuit, and the pressure stabilizing and buffering effects are realized through the increase of the sectional area.
Further, the air outlet device 15 includes a body 23 having an inner cavity, a transmission device 24 and a blowing window 25, the blowing window 25 is communicated with the body to guide out the cooling air, and the transmission device 24 is disposed on the body 23 and controls the blowing window 25 to move or rotate. The second uniform distributor 21 is arranged in the inner cavity and is attached to the inner wall of the inner cavity.
Because different tows 8 have different requirements on air, the positions of the air blowing window 25 and the tows 8 are adjusted by the transmission device 24, the best air blowing effect is achieved, the air supply volume is effectively adjusted on the premise that the spinning is smooth, the smooth spinning under the lower air supply volume can be effectively realized, and the energy consumption is effectively reduced.
The transmission device 24 comprises a support arranged on the body 23, the lower end of the support is supported on the ground, a sliding rod piece is arranged on the support and can slide relative to the support, and the blowing window 25 is arranged on the sliding rod and can slide along with the sliding rod. The blowing window 25 slides on the bracket, and the position of the opening of the blowing window 25 is adjusted.
The transmission device 24 further comprises a manual rocker 27, the manual rocker 27 is connected with the sliding rod through a transmission belt or transmission connection, and the handle drives the transmission belt or transmission chain to move so as to drive the sliding rod to move and drive the blowing window 25 to move.
The blowing windows 25 are preferably blowing tubes or blowing slits. The blowing tubes are preferably round, so that gaps are more uniform, and the blowing slits are long and improve the blowing area. The air outlet window is a transverse air blowing window 25.
The blowing pipe array is 1.5-5.0 mm in pipe diameter, 2-4 rows of pipe arrays are arranged, and the slit height of the blowing slit is 1.0-5.0 mm.
Example two
As shown in fig. 1-2, this embodiment is a specific scheme of the first embodiment, and includes a filament spraying device 1, a blowing system and a recovery processing system, where the blowing system blows air to the filament bundle 8 sprayed from the filament spraying device 1 to cool and shape the filament bundle 8, and the recovery processing system recovers the air after heat exchange with the filament bundle 8 and recovers and processes the air.
The recovery processing system comprises a spraying device 2, an air suction pipeline 3 and an exhaust pipeline 4, wherein the spraying device 2 comprises a box body 5, a sprayer 6 arranged in the box body 5 and a water supply pipeline 7 communicated with the sprayer 6, the water supply pipeline 7 supplies water to the sprayer 6, so that the water in the sprayer 6 sprays wind entering the box body 5 to remove a solvent in the wind. The air suction pipeline 3 and the air exhaust pipeline 4 are both communicated with the box body 5, and air after heat exchange with the tows 8 enters the spraying device 2 through the air suction pipeline 3 and is exhausted from the air exhaust pipeline 4 after being sprayed and absorbed. A shower 6 is provided at the top of the tank 5. The air suction pipe 3 is connected to the side wall of the box 5, and the air discharge pipe 4 is located on the top wall of the box, but the above structure is not limited to the above arrangement.
The air inlet 50 of the air suction pipeline is opposite to the tows 8, so that air which exchanges heat with the tows 8 can conveniently enter the spraying device 2 through the box body 5, and is discharged out of the box body 5 through the exhaust pipeline 4 after being sprayed and absorbed.
Be equipped with slewing mechanism 9 on the roof inner wall of box 5, slewing mechanism 9 includes base and connector, and base and 5 inner wall connections of box, swivel head and base sphere are connected, and spray thrower 6 is connected on the swivel head, realizes 360 no dead angles along with the swivel head and rotates, and simultaneously, spray set 2 still includes electric controller, electric controller is connected with the connector electricity, controls its rotation. During spraying, the showerhead 10 is preferably oriented toward the gas flow, preferably in a counter-current direction, to provide a good gas flow interface.
The volume of the box body 5 is preferably 50-100L.
The sprayer 6 comprises a plurality of spray headers 10, or the sprayer 6 is arranged in a plurality, and the sprayer 6 is a row type sprayer 6. The spray head 10 is internally provided with a spray filter screen 11 for filtering water in the water supply pipeline 7, or the spray 6 is internally provided with a spray filter screen 11, and the aperture of the mesh of the filter screen is 100-300 mu m.
The air inlet of the exhaust pipeline 4 is communicated with the top of the box body 5, so that recovered air which is insoluble in water can be conveniently exhausted out of the box body 5, and the air outlet 51 of the exhaust pipeline is communicated with the air inlet end of the blowing system, so that the air passing through the spraying device 2 is guided into the blowing system. The recovered wind is promoted to stably flow in the spraying chamber from the inlet to the outlet.
An overflow port 12 is arranged on the side wall of the box body 5, the collecting device 13 is communicated with the overflow port 12 through a pipeline, and the sprayed liquid enters the collecting device 13 through the overflow port 12.
The blowing system comprises a fan 14 and an air outlet device 15 used for blowing the tows 8, the air outlet end of the fan 14 is communicated with the air outlet device 15 through an air supply pipeline 16, and the air inlet end of the fan 14 is communicated with an air outlet 51 of an air exhaust pipeline. Air supply pipeline 16 includes the great first pipeline section of diameter and the less second pipeline section of diameter, is connected through the excessive section that the diameter reduces gradually between first pipeline section and the second pipeline section, and excessive section and second pipeline section form the reducing section, effectively solve the problem that the wind speed is low excessively, and the air inlet end of first pipeline section is connected with the air-out end of motor, and the air-out end and the air-out device 15 of second pipeline section are connected. The first pipe section is also provided with a dehumidifier 28 for dehumidifying cooling air with a high humidity.
The second pipeline section is provided with a surge tank, a first distributor 19 is arranged in a pressure stabilizing cavity 22 of the surge tank, the first distributor is a partition plate with holes, the holes on the partition plate are uniformly distributed, and the edge of the partition plate is connected with the inner wall of the buffer tank in a sealing manner. Still be equipped with filter 20 in the second pipeline section, filter gas, get rid of the impurity in the gas, be equipped with second equipartition ware 21 in the air-out device 15, carry out the equipartition to the cooling air before the air-out, reach the stable cooling air of homogeneous more. The first uniform distributor 19, the pressure stabilizing cavity 22, the filter 20 and the second uniform distributor 21 are used for accelerating the speed of the air with lower speed and low air quantity provided by the fan through the structures, the air is compressed due to the fact that the cooling air enters the diameter-variable section, turbulence easily occurs, gas is not uniform in a pipeline, the cooling air is uniformly distributed through the first uniform distributor 19, the uniformly distributed cooling air enters the pressure stabilizing cavity for stabilizing the pressure, the uniform distribution is firstly carried out and then the pressure is stabilized, energy loss of the gas in the conveying process is small, the speed accelerating effect is better, the uniform distribution is further carried out through the second uniform distributor, the cooling air is more uniform and stable, and influence on tows is reduced.
The air outlet device 15 comprises a body 23 with an inner cavity, a transmission device 24 and a blowing window 25, wherein the blowing window 25 is communicated with the inner cavity, and the transmission device 24 is arranged on the body 23 and controls the blowing window 25 to move or rotate. Alternatively, the transmission 24 is provided on the body 23, and movement of the control body drives the blowing window 25 to move or rotate. The blowing windows 25 are blowing pipes. The air blowing tube array is circular, the diameter of the air blowing tube array is 1.5-5.0 mm, and the number of tube array rows is 2-4. The transmission device 24 comprises a support arranged on the body 23, the lower end of the support is supported on the ground, a sliding rod piece is arranged on the support, and the blowing window 25 is arranged on the sliding rod. The blowing window 25 slides on the bracket, and the position of the opening of the blowing window 25 is adjusted.
The transmission device 24 further comprises a manual rocker 27, the manual rocker 27 is connected with the sliding rod through a transmission belt or transmission connection, and the handle drives the transmission belt or transmission chain to move so as to drive the sliding rod to move and drive the blowing window 25 to move.
The structure is particularly suitable for relatively lowering the temperature and the humidity of the recycled side-blown air when the temperature of the external natural air is relatively high, so that the energy consumption of the compressor in the blowing system can be greatly reduced, and the production cost is effectively reduced.
EXAMPLE III
An energy-saving cooling method for cellulose fiber spinning comprises the following steps: cooling the tows 8 sprayed by the spinning device 1 by adopting the energy-saving cooling devices of the first embodiment and the second embodiment, and controlling the blowing air volume to be 40-200 m3The air blowing speed is 5-60 m/s, the air blowing temperature is 3-20 ℃, the relative humidity is 20-90%, and the air gap height is 10-80 mm.
The method can ensure smooth spinning and excellent fiber quality, and can ensure small air quantity and high solvent recovery rate, thereby realizing the purpose of energy conservation.
The scheme is further limited, and the blowing air volume is 60-150 m3The air blowing speed is 15-35 m/s, the air blowing temperature is 5-18 ℃, the relative humidity is 30-70%, and the air gap height is 15-40 mm.
The scheme is further limited, and the blowing air volume is 80-120 m3The air blowing speed is 20-30 m/s, the air blowing temperature is 8-15 ℃, and the relative humidity is 40%65 percent and the height of the air gap is 20-30 mm.
The method is suitable for spinning the cellulose fiber spinning solution prepared by the solvent method, saves energy, realizes the recovery of the solvent, realizes the recycling of cooling air and greatly saves energy.
Further, the energy-saving cooling method for the cellulose fiber spinning comprises the step of adjusting the distance between the air blowing window 25 and the spinneret orifice of the spinneret device 1 by using the transmission device 24 in the air cooling process, so that the distance between the air blowing window 25 and the spinneret orifice of the spinneret device 1 is 3-40 mm.
In the further limited scheme, the distance between the air blowing window 25 and the spinneret orifice of the spinneret device 1 is 5-15 mm.
In the further limited scheme, the distance between the air blowing window 25 and the spinneret orifice of the spinneret device 1 is 6-10 mm.
The cooling method is particularly suitable for spinning by a spinneret plate 26 with 10000-60000 holes and 8-14% of cellulose content, and can greatly improve the fiber quality, improve the production efficiency and reduce the production cost.
Example four
By adopting the devices of the first embodiment and the second embodiment, under the method of the third embodiment, the air cooling effects of the energy-saving cooling device I and the conventional cooling device II of the invention on the same fiber tow 8 are compared, and the air cooling effects of the two devices are measured, wherein the conventional cooling device II is the device of patent CN200610116247, and the experiment is as follows:
experiment 1
The method comprises the steps of completely dissolving cellulose with 8% of solid content in NMMO to form a spinning stock solution, spinning the spinning stock solution through a spinning device 1, cooling fiber tows 8 through an energy-saving cooling device I and a conventional cooling device II, adjusting a blowing window 25 to be 2mm from a plate surface (A) of a spinneret plate 26 by using a transmission device 24, adjusting the distance (B) between a cooling air outlet of the blowing window 25 and a spinneret orifice to be 15mm, adjusting the air gap height (C) to be 25mm, adjusting the vertical distance (D) between an air inlet 50 of an air suction pipeline and the cooling air outlet of the blowing window 25 to be 15mm, adjusting the horizontal distance (E) to be 170mm, and then carrying out processes such as solidification and forming to obtain the finished short fiber. The blowing process parameters and spinnability test results are shown in table 1:
TABLE 1 spinnability test results
As can be seen from experiment 1 above: under the premise that other conditions are the same, if the cooling device is not additionally arranged to cool the tows 8 in the spinning process of the spinning solution, the tows 8 cannot be stably and continuously wound. Secondly, when the air outlet of the conventional cooling device is close to the spinneret plate 26, the filament bundle 8 cannot be stably and continuously wound, and the filament bundle 8 can only be stably and continuously wound at a long distance. Compared with the conventional cooling device, when the energy-saving cooling device is used, the cross air blowing needs to meet the requirements of low air quantity, low air speed, high rheumatism and high air temperature, the energy consumption of a compressor of the air blowing system can be greatly reduced, and the production cost is reduced.
Experiment 2
The method comprises the steps of completely dissolving cellulose with the solid content of 9% in NMMO to form a spinning stock solution, spinning the spinning stock solution through a spinning device 1, cooling fiber tows 8 through an energy-saving cooling device I and a conventional cooling device II, enabling the distance (A) between the upper edge of an air blowing window 25 and the plate surface (A) of a spinneret plate 26 to be 2mm, enabling the distance (B) between a cooling air outlet of the air blowing window 25 and a spinneret orifice to be 15mm, enabling the height (C) of an air gap to be 25mm, enabling the vertical distance (D) between an air inlet 50 of an air suction pipeline and the cooling air outlet of the air blowing window 25 to be 15mm and the horizontal distance (E) to be 170mm, and then carrying out processes of solidification forming and the like to obtain the finished. After being cooled by different cooling and blowing devices, the power consumption of the blowing system is shown in table 2:
table 2 power consumption measuring and calculating results of the blowing system
As can be seen from experiment 2 above: firstly, on the premise of the same other conditions, the fiber is cooled by the energy-saving cooling device I and the conventional cooling device II in the spinning process of the spinning stock solution, and the fiber can be stably and continuously wound into a tow 8, but the distance from the air outlet of the conventional cooling device II to the spinneret plate 26 is larger than the distance from the air outlet of the energy-saving cooling device I to the spinneret plate 26, and the energy consumption of the side blowing system using the energy-saving cooling device is also smaller than that of the side blowing system using the conventional cooling device, so that the production cost is reduced.
Experiment 3
Cellulose with solid content of 10% is completely dissolved in NMMO to form spinning stock solution, the spinning stock solution is spun through a spinning device 1, the fiber is cooled through an energy-saving cooling device I and a conventional cooling device II, the distance (A) between the upper edge of a blowing window 25 and the surface of a spinneret plate 26 is 2mm, the distance (B) between a cooling air outlet of the blowing window 25 and a spinneret orifice is 25mm, the air gap height (C) is 25mm, the vertical distance (D) between an air inlet 50 of an air suction pipeline and the cooling air outlet of the blowing window 25 is 15mm, the horizontal distance (E) is 170mm, and then the finished short fiber is prepared through processes of solidification forming and the like. The maximum draft times of the fibers after cooling by different cooling and blowing devices are shown in table 3:
TABLE 3 fiber maximum draft test results
As can be seen from experiment 3 above: firstly, on the premise of the same other conditions, the spinning stock solution can be stably and continuously wound into tows 8 by cooling the fibers through the energy-saving cooling device I and the conventional cooling device II in the spinning process, but the distance from the air outlet of the conventional cooling device II to the spinneret 26 is larger than the distance from the air outlet of the high-efficiency energy-saving cooling device I to the spinneret 26, which also shows that the high-efficiency energy-saving cooling device of the invention has smaller requirements on side blowing, the maximum drafting multiple of the fibers cooled through the energy-saving cooling device I of the invention is obviously larger than that of the fibers cooled through the conventional cooling device II, namely on the premise of the same extrusion amount of the spinning stock solution and the spinneret 26, the maximum yield of the fibers cooled through the high-efficiency energy-saving cooling device I of the invention is obviously larger than that of the fibers cooled through the conventional cooling device II, thereby achieving the purpose of high efficiency.
Example 4
The preparation method comprises the steps of completely dissolving cellulose with 12% of solid content in NMMO to form a spinning stock solution, spinning the spinning stock solution through a spinning device 1, cooling fiber tows 8 through an energy-saving cooling device I and a conventional cooling device II, wherein the distance (A) between the upper edge of an air blowing window 25 and the surface of a spinneret plate 26 is 2mm, the distance (B) between a cooling air outlet of the air blowing window 25 and a spinneret orifice is 25mm, the height (C) of an air gap is 25mm, the vertical distance (D) between an air inlet 50 of an air suction pipeline and the cooling air outlet of the air blowing window 25 is 15mm, the horizontal distance (E) is 170mm, and then the fiber is prepared into finished short fibers through the processes of solidification, solidification and the mechanical properties of the fiber are as shown in 4:
TABLE 4 fiber mechanical Properties test results
It can be seen from experiment 4 above that: firstly, on the premise of the same other conditions, the fiber is cooled by the energy-saving cooling device I and the conventional cooling device II in the spinning process of the spinning stock solution, and the stable and continuous winding of the fiber into a tow 8 can be realized, but the distance from the air outlet of the conventional cooling device II to the spinneret plate 26 is larger than the distance from the air outlet of the high-efficiency energy-saving cooling device I to the spinneret plate 26, which also shows that the high-efficiency energy-saving cooling device I has smaller requirement on side blowing, and the mechanical property of the fiber cooled by the energy-saving cooling device I is obviously superior to that of the fiber cooled by the conventional cooling device II, namely, the quality of the prepared fiber is more superior under the same conditions.
Experiment 5
The method comprises the steps of completely dissolving cellulose with the solid content of 14% in NMMO to form a spinning stock solution, spinning the spinning stock solution through a spinning device 1, cooling fiber tows 8 through an energy-saving cooling device I and a conventional cooling device II, enabling the distance (A) between the upper edge of an air blowing window 25 and the plate surface (A) of a spinneret plate 26 to be 2mm, enabling the distance (B) between a cooling air outlet of the air blowing window 25 and a spinneret orifice to be 25mm, enabling the air gap height (C) to be 25mm, enabling the vertical distance (D) between an air inlet 50 of an air suction pipeline and the cooling air outlet of the air blowing window 25 to be 15mm and the horizontal distance (E) to be 170mm, and then carrying out processes of solidification forming and the like to prepare the finished short. After being cooled by different cooling and blowing devices, the solvent recovery system recovers 50% of NMMO solvent amount as shown in Table 5:
TABLE 5 recovery test results for solvent recovery systems
It can be seen from experiment 5 above that: firstly, on the premise that other conditions are the same, the spinning stock solution can be stably and continuously wound into tows 8 by cooling the fibers through the energy-saving cooling device I and the conventional cooling device II in the spinning process, but the distance from the air outlet of the conventional cooling device II to the spinneret 26 is larger than the distance from the air outlet of the high-efficiency energy-saving cooling device I to the spinneret 26, and the condition that the requirement of the high-efficiency energy-saving cooling device on side blowing is smaller when the conventional cooling device II is used for cooling, 50% of NMMO solvent recovery amount is 0, when the energy-saving cooling device I is used, 50% of NMMO solvent recovery amount is up to 0.15%, the solvent recovery rate can be effectively improved, and the production cost is reduced.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (16)
1. The energy-saving cooling device for fiber spinning is characterized by comprising a spinning device, an air blowing system and a recovery processing system, wherein the air blowing system blows air to tows sprayed by the spinning device to cool the tows, and the recovery processing system is used for recovering and/or processing cooling air blown to the tows by the air blowing system;
the recycling treatment system comprises a spraying device, an air suction pipeline and an exhaust pipeline, wherein the air suction pipeline and the exhaust pipeline are communicated with the spraying device, air after heat exchange with the tows enters the spraying device through the air suction pipeline and is discharged from the exhaust pipeline after being sprayed and absorbed;
the spraying device comprises a box body and a sprayer arranged in the box body, wherein a rotating mechanism is arranged on the box body, and the sprayer is connected to the rotating mechanism; the rotating mechanism comprises a base and a rotating head, the base is connected with the box body, the rotating head is connected with the spherical surface of the base, and the sprayer is connected to the rotating head; the spraying device also comprises an electric controller which is electrically connected with the rotating head and controls the rotating head to rotate;
the recovery processing system also comprises a collecting device, wherein the collecting device is communicated with the spraying device and is used for collecting and recovering the absorption liquid in the spraying device; the spraying device is provided with an overflow port, the collecting device is communicated with the overflow port through a pipeline, and the sprayed liquid enters the collecting device through the overflow port; the water which is collected in the collecting device and absorbs the solvent is subjected to subsequent post-treatment to obtain the solvent;
a circulating pipeline is arranged between the collecting device and the spraying device, the liquid inlet end of the circulating pipeline is communicated with the lower part of the collecting device, and the upper part of the circulating pipeline is communicated with a water supply pipeline of the spraying device;
the blowing system comprises a fan and an air outlet device for blowing air to the tows, and the air outlet end of the fan is communicated with the air outlet device through an air supply pipeline; the air supply pipeline is provided with a reducing section with a reduced inner diameter and used for increasing the air speed in the air supply pipeline;
the blowing system also comprises a pressure stabilizing device and a filter which are arranged on the air supply pipeline, the pressure stabilizing device is arranged at the downstream of the reducing section and is communicated with the air supply pipeline, the filter is arranged in the air supply pipeline and is positioned at the downstream of the pressure stabilizing device, a first uniform distributor is arranged in the pressure stabilizing device, and a second uniform distributor is arranged in the air outlet device; the pressure stabilizing device is provided with a pressure stabilizing cavity, the pressure stabilizing cavity is communicated with the air supply pipeline, and the first uniform distributor is arranged in the pressure stabilizing cavity; the sectional area of the pressure stabilizing cavity is larger than that of the air supply pipeline;
the air outlet device comprises a body with an inner cavity, a transmission device and an air blowing window, the air blowing window is communicated with the inner cavity to guide cooling air out, and the transmission device is arranged on the body and controls the air blowing window to move or rotate;
the transmission device comprises a support arranged on the body, the lower end of the support is supported on the ground, a sliding rod is arranged on the support and can slide relative to the support, and the blowing window is arranged on the sliding rod and can slide along with the sliding rod;
the transmission device further comprises a manual rocker, the manual rocker is connected with the sliding rod through a transmission belt or a transmission chain, and the manual rocker drives the transmission belt or the transmission chain to move to drive the sliding rod to move and drive the blowing window to move.
2. The energy-saving cooling device for fiber spinning according to claim 1, wherein the spraying device further comprises a water supply pipeline communicated with the sprayer, the air suction pipeline and the air exhaust pipeline are both communicated with the box body, and an air inlet of the air suction pipeline is opposite to the tows.
3. The energy-saving cooling device for fiber spinning according to claim 2, wherein the air outlet of the air exhaust pipeline is communicated with the air inlet end of the air blowing system, and the air passing through the spraying device is guided into the air blowing system.
4. The energy-saving cooling device for fiber spinning according to claim 3, wherein the sprayer comprises at least one spray head, a spray filter screen for filtering water in the water supply pipeline is installed in the spray head, and the mesh aperture of the filter screen is 100-300 μm.
5. The energy-saving cooling device for fiber spinning according to any one of claims 1 to 4, wherein the air inlet end of the fan is communicated with a recovery processing system.
6. The energy-saving cooling device for fiber spinning according to claim 5, wherein the air inlet end of the fan is communicated with the air outlet of the exhaust pipeline.
7. The energy-saving cooling device for fiber spinning according to claim 1, wherein the pipe diameter of the air supply pipeline is locally reduced inwards to form a reducing section with a reduced inner diameter.
8. The energy-saving cooling device for fiber spinning according to claim 1, wherein the blowing windows are blowing tubes or blowing slits.
9. The energy-saving cooling device for fiber spinning according to claim 8, wherein the blowing tubes are circular and the blowing slits are elongated.
10. The energy-saving cooling device for fiber spinning according to claim 9, wherein the blowing tube array has a tube diameter of 1.5-5.0 mm, the number of tube arrays is 2-4, and the slit height of the blowing slit is 1.0-5.0 mm.
11. An energy-saving cooling method for cellulose fiber spinning is characterized by comprising the following steps: spinning the cellulose fiber spinning solution prepared by the solvent method by using a spinning device, cooling the tows spun by the spinning device by using the energy-saving cooling device of any one of claims 1 to 10, and controlling the blowing air volume to be 40-200 m3The air blowing speed is 5-60 m/s, the air blowing temperature is 3-20 ℃, the relative humidity is 20-80%, and the air gap height is 10-60 mm.
12. The energy-saving cooling method according to claim 11, wherein the blowing air volume is 60 to150m3The air blowing speed is 15-35 m/s, the air blowing temperature is 5-18 ℃, the relative humidity is 30-70%, and the air gap height is 15-40 mm.
13. The energy-saving cooling method according to claim 12, wherein the blowing air volume is 80-120 m3The air blowing speed is 20-30 m/s, the air blowing temperature is 8-15 ℃, the relative humidity is 40-65%, and the air gap height is 20-30 mm.
14. The energy-saving cooling method as claimed in any one of claims 11 to 13, wherein the distance between the blowing window and the spinneret orifice of the spinneret device is adjusted by the transmission device so that the distance between the blowing window and the spinneret orifice of the spinneret device is 3 to 40 mm.
15. The energy-saving cooling method according to claim 14, wherein the distance between the blowing window and the spinneret orifice of the spinneret device is 5-15 mm.
16. The energy-saving cooling method of claim 15, wherein the distance between the blowing window and the spinneret orifice of the spinneret device is 6-10 mm.
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| CN109082721A (en) * | 2018-11-08 | 2018-12-25 | 长兴盛纺织有限公司 | A kind of environmentally friendly cooling device of chemical fiber wire |
| CN112011838A (en) * | 2019-05-29 | 2020-12-01 | 上海炅杰橡塑实业有限公司 | Circulating cooling device of spinning machine |
| CN113122940A (en) * | 2021-03-06 | 2021-07-16 | 桐昆集团股份有限公司 | Polyester black special-shaped POY fiber production equipment and production method |
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