CN103388186A

CN103388186A - Tow drying device

Info

Publication number: CN103388186A
Application number: CN201210141112XA
Authority: CN
Inventors: 杨正锋; 肖坤后; 刘顺同; 吴继发
Original assignee: Hunan Shaoyang Textile Machinery Co Ltd
Current assignee: Hunan Shaoyang Textile Machinery Co Ltd
Priority date: 2012-05-09
Filing date: 2012-05-09
Publication date: 2013-11-13

Abstract

The invention relates to a tow drying device. The tow drying device consists of multiple sections of drying rooms, wherein a plurality of tow guiding rollers are arranged in each section of drying room and are divided into a left column and a right column, and each left column and the related right column are of upward-downward staggered arrangement in the horizontal direction; and tows enter from an upper inlet of the first section of drying room, sequentially pass through all the tow guiding rollers in the first section of drying room, then, enter the second section of drying room from a lower tow outlet of the first section of drying room, and are wound in such a manner until the tows exit from the tow outlet of the final drying room. The drying device is provided with an internal hot air circulation circuit and an external hot air circulation circuit, wherein the external hot air circulation circuit is a hot air circulation system which carries out heat exchange with the outside and carries out water vapor emission after the multiple sections of drying rooms are connected in series; and the internal hot air circulation circuit is an internal temperature equilibration and circulation system which is isolated from the outside and is independent. The tow drying device has the advantages that the tow drying device is applicable to the tow drying of large-capacity production lines, the energy consumption during tow drying can be lowered greatly, meanwhile, the uniformity of heating during tow drying is improved, and the quality of fibers is improved.

Description

A kind of tow drying unit

Affiliated technical field

The invention belongs to a kind of weaving drying unit, be specifically related to a kind of high-performance fiber tow (as high strength high modulus PVA, aramid fiber 1313, Fanglun l414) is dried after washing device.

Background technology

At present, in the high-performance fiber production process, the tow moisture content after washing is generally 60%～120%.In order to improve the brute force of fiber, all must carry out high drafting to tow under the environment of the vitrification point a little less than high-performance fiber, and the moisture in tow can absorb heat and produce a large amount of steam after entering baking oven, oven temperature is reduced.Therefore, must dry tow before drawing-off.Common tow drying unit is such: tow is wrapped on low-angle pair roller of a pair of center line inclination, a roller of pair roller initiatively, a roller is passive, and two fulcrums of passive roller can move, to change the angle of driven roll and drive roll center line.Tow is wound around 6～8 circles repeatedly on pair roller, between the tow of up and down, electric heater is set, and tow is carried out radiation heating.Such drying unit has three shortcomings: the radiation of first electric heater is inhomogeneous, causes tow to be heated inhomogeneous, affects the quality of fiber.It two is that the thermal efficiency of device is too low, moisture in tow forms the damp-heat air of certain humidity after heating, when the humidity height to a certain extent the time, moisture in tow no longer volatilizees, and therefore damp-heat air must be discharged, and the discharge of damp-heat air can be taken away a lot of heat energy, and the cold air that supplements needs just can enter drying unit after heating, like this, the intensification of cold air needs again to consume a lot of energy, causes the energy resource consumption of double-roll device very large.It three is requirements that this kind drying unit is not suitable for large capacity Line.At present, high-performance fiber such as high-strength high-modulus polyethylene alcohol, the annual production of fiberline requires to reach 3000 tons, and the drying unit of pair roller type is due to the restriction that is subjected to roller length and operation, the annual production maximum can only reach 800 tons, therefore can't meet the requirement of large capacity Line.

Summary of the invention

The present invention aims to provide a kind of tow drying unit that is fit to large capacity Line, the energy consumption when it can reduce the oven dry tow greatly, and being heated evenly property while making simultaneously the tow oven dry, improve fiber quality.

The technical solution that the present invention proposes is such: the more piece drying room is in line successively, in every joint drying room, some godet rollers is set all, and godet roller is divided into left and right two row, and left and right two is listed in horizontal direction up and down Heterogeneous Permutation.Tow enters from the import of first segment drying room top, after each godet roller in drying room, from the below filament mouth of first segment drying room, enters into the second section drying room successively, and wrapping wire so repeatedly, until from the filament mouth of last drying room out.This drying unit is provided with inside and outside two hot air circulation loops: outer circulation is to carry out the hot air circulating system of heat exchange, moisture discharge after the series connection of more piece drying room with the external world; Interior circulation be hedged off from the outer world, the inner samming circulatory system independently.The air exhauster of the little wind speed of little air quantity is adopted in outer circulation, its objective is the moisture of discharging in baking oven, but the moisture of discharging is the high temperature air through heating, therefore can take away a lot of heats, so reduce the key that the capacity of outer circulation is energy savings as far as possible.The outer circulation air exhauster is arranged on the top of first segment drying room, extracts the damp-heat air in drying room, and when humidity was greater than setting value in humidity measurement instrument detects drying room, the exhaust of outer circulation air exhauster was accelerated, and drying room humidity is reduced.Damp-heat air outlet side in outer circulation is provided with tail gas heat exchanger, and the fresh air that utilizes the heat energy of discharging hot-air to come preheating to supplement makes fresh air enter the front temperature of drying room and obtains the lifting of certain amplitude, thereby realizes the purpose of energy savings.Every joint drying room is provided with a cover internal circulation system.The drying room internal upper part is provided with the tapered injection airduct, and taper air inducing chamber is arranged at bottom, and godet roller is positioned between the two.After the tow above godet roller, due to the evaporation of moisture, air themperature reduces from the hot-air of tapered injection airduct ejection.Circulating fan in driven by motor, the heater that circulated air is delivered in interior circulation air path heats up, then delivers to the tapered injection airduct, so iterative cycles.The blower fan of Wind Volume, high wind speed is adopted in interior circulation, makes gas in every joint drying room blow over tow with speed faster under fan action, the steam while taking away the tow evaporation, and because wind speed is fast, the hot air circulate cycle is short, and therefore in whole drying room, temperature is even.The variable cross-section tapered injection airduct of particular design can guarantee that temperature is even in larger fabric width scope simultaneously, therefore more than the length of godet roller can add and grows to 1.5m, the more tow of can arranging on godet roller, the tow total fiber number of production line strengthens, thereby improves the annual production of production line.

Tow drying unit provided by the invention has advantages of oven dry good uniformity, energy savings, can meet the requirement of large capacity Line simultaneously.

Description of drawings

Fig. 1 is the front view of the embodiment of the present invention;

Fig. 2 is the lateral plan of the embodiment of the present invention;

1. damp-heat air outlets, 2. cool air inlet, 3. tail gas heat exchanger in figure, 4. outer circulation air exhauster, 5. humidity measurement instrument, 6. godet roller, 7. first segment drying room, 8. second section drying room, 9. the 3rd joint drying room, 10. the 4th save drying room, 11. motors, 12. interior circulating fans, 13. taper air inducing chamber, 14. the tapered injection airduct, 15. interior circulation air paths, 16. heaters.

The specific embodiment

As shown in the figure, the present invention is comprised of damp-heat air outlet (1), cool air inlet (2), tail gas heat exchanger (3), outer circulation air exhauster (4), humidity measurement instrument (5), godet roller (6), drying room (7,8,9,10), motor (11), interior circulating fan (12), taper air inducing chamber (13), tapered injection airduct (14), interior circulation air path (15), heater (16).The present embodiment arranges 4 joint drying rooms (7,8,9,10), is in line successively, and every joint drying room all arranges 8 godet rollers (6) in (7,8,9,10), and godet roller (6) is divided into left and right two row, and left and right two is listed in horizontal direction up and down Heterogeneous Permutation.Tow enters from first segment drying room (7) top import, successively after 8 godet rollers (6) in drying room, form 9 layers of tow, enter into second section drying room (8) from the below filament mouth of first segment drying room (7), wrapping wire is until from the filament mouth of the 4th joint drying room (10) out, form altogether 36 layers of tow in four joints drying rooms (7,8,9,10) so repeatedly.This drying unit is provided with inside and outside two hot air circulation loops.Be provided with an outer circulation air exhauster (4) at the top of first segment drying room (7), extract the damp-heat air in drying room (7), when humidity was greater than setting value in humidity measurement instrument (5) detects drying room (7), outer circulation air exhauster (4) exhaust was accelerated, and drying room (7) humidity is reduced.Like this, meeting reduce capacity under the prerequisite of drying effect, making capacity and drying effect reach the dynamic equilibrium an of the best, thus energy savings.When the damp-heat air that outer circulation air exhauster (4) is discharged passes through tail gas heat exchanger (3), because the temperature of the damp-heat air of discharging is high, and it is low to enter the supplementary air themperature of tail gas heat exchanger (3) from cool air inlet (2), two kinds of gases have larger contact area in tail gas heat exchanger (3) in addition, therefore, the air themperature of supplementing rises, and the air themperature of from damp-heat air outlet (1), discharging descends, thereby saves the energy of heat make-up air.Every joint drying room (7,8,9,10) is provided with a cover internal circulation system.The top of drying room (7,8,9,10) is provided with tapered injection airduct (14), and taper air inducing chamber (13) is arranged at bottom, and godet roller (6) is positioned between the two.From the hot-air of tapered injection airduct (14) ejection through the tow above godet roller (6) after, due to the evaporation of moisture, the air themperature reduction.Circulating fan (12) in motor (11) drives, the heater (16) that circulated air is delivered in interior circulation air path (15) heats up, then delivers to tapered injection airduct (14), so iterative cycles.

After testing, adopt the drying unit of the inside and outside circulatory system, drying room temperature deviation in the fabric width scope is ± 1 ℃, reaches dry technological requirement fully; When adopting electrical heating, the electric consumption of silk per ton saves 40% than pair roller type drying unit, the energy-saving effect highly significant; The annual production of production line is brought up to 3000 tons by 800 tons, has met the requirement of large capacity Line.

Claims

1. tow drying unit, by drying room, godet roller, tail gas heat exchanger, the outer circulation air exhauster, humidity measurement instrument, motor, interior circulating fan, taper air inducing chamber, the tapered injection airduct, interior circulation air path, the compositions such as heater, be provided with outer circulation air exhauster and humidity measurement instrument at the top of first segment drying room, the outlet of outer circulation air exhauster is provided with tail gas heat exchanger, the drying room internal upper part is provided with the tapered injection airduct, taper air inducing chamber is arranged at bottom, it is characterized in that: in every joint drying room, some godet rollers are set all, godet roller is divided into left and right two row, left and right two is listed in horizontal direction and misplaces up and down, and between tapered injection airduct and taper air inducing chamber.