CN102797064A - Drying and adjusting process and device for viscose fibers - Google Patents

Drying and adjusting process and device for viscose fibers Download PDF

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Publication number
CN102797064A
CN102797064A CN2012103185195A CN201210318519A CN102797064A CN 102797064 A CN102797064 A CN 102797064A CN 2012103185195 A CN2012103185195 A CN 2012103185195A CN 201210318519 A CN201210318519 A CN 201210318519A CN 102797064 A CN102797064 A CN 102797064A
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China
Prior art keywords
steam
drying
heat exchanger
air
viscose
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CN2012103185195A
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CN102797064B (en
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耿文广
李选友
高玲
马晓旭
员冬玲
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SHANDONG TIANLI DRYING CO Ltd
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SHANDONG TIANLI DRYING CO Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product
    • Y02P70/62Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear

Abstract

The invention discloses a drying and adjusting process for viscose fibers. The process comprises the following steps of: 1) feeding the viscose fibers into a superheated vapor drier in a front area by a feeder; feeding a drying medium heated by a vapor coil into a drying chamber of the superheated vapor drier in the front area; drying the viscose fibers; evaporating water of the viscose fibers during drying; increasing pressure; and discharging out excessive water vapor to an oscillating-flow heat pipe heat exchanger through the linkage of a pressure controller and an induced draft fan; 2) under an effect of a chain conveying device, conveying the viscose fibers to a superheated vapor drier in a middle area, wherein the drying process in the middle area is similar to that in the front area; meanwhile, discharging out the excessive water vapor to the oscillating-flow heat pipe heat exchanger; and 3) heating the recycled water vapor in the oscillating-flow heat pipe heat exchanger into fresh air; feeding the fresh air into a hot air drier in a back area, so as to finish deep drying and adjusting of the viscose fibers; obtaining the dried viscose fibers; and emptying tail gas. The invention further discloses a device of the process. The viscose fibers with high qualities can be obtained; and energy consumption is reduced by 35-40%.

Description

The oven dry of viscose and adjusting technology and device
Technical field
The present invention relates to a kind of oven dry and adjusting technology and device of viscose.
Background technology
Viscose is regarded as high pollution, highly energy-consuming, expensive industry always; China's viscose output accounts for 60% of world wide production at present; The energy consumption and the blowdown that bring thus heighten, and energy consumption and environmental issue become one of further fast-developing " bottleneck " property problem of restriction China viscose glue industry.Wherein, the whole energy consumption level of viscose glue industry exceeds 10~30% than international most advanced level, and also there are a lot of problems in this external disposal of waste gas, water and industrial residue aspect.Therefore, energy-conservation, reduction of discharging has become the core work of viscose glue industry sustainable development.
In the viscose industry, dryer is one of highly energy-consuming equipment, also is the emphasis of energy-saving and emission-reduction; What adopt usually at present is common warm-air type dryer; Dry 1 ton of viscose and consume 2.8 tons of steam approximately, the dried tail gas temperature is about 110 ℃, water vapour content about 60~70%; The direct emptying of tail gas that carries a large amount of waste heats causes huge energy waste on the one hand, causes serious environmental to pollute on the other hand.
Curtain formula or drying cylinder formula drying machine subregion stage drying are adopted in the oven dry of viscose and adjusting usually, and proparea drying medium temperature is 70~100 ℃; 100~120 ℃ in middle district; 60~70 ℃ of back zones; Get into the damping stage then.Shredding wet fiber deliver on the sheet convoying curtain to machine by feeding; About 100 millimeters of fiber floor height on the maintenance convoying curtain, translational speed is 0.82~3.7 meter/minute, pressure fan blasts fresh air; Air-heater blasts high steam simultaneously; Discharged by exhaust fan by circulating fan repeated multiple times circulation back, this drying course mesohigh vapours plays the effect that heat temperature raising makes the moisture gasification again, and fresh air works the wet effect of taking.Dried tail gas can't effectively carry out waste heat recovery in this traditional drying system; Its main cause has two aspects: first; The drying medium that is utilized in these three sections is steam and Air mixing gas; Dried tail gas contains a large amount of incoagulable gas, and air specific heat is little, has assembled heat exchanger and also only can reclaim fraction dried tail gas sensible heat afterwards; The second, can carry capillary fiber secretly in the drying course dried tail gas of viscose, if the common fin-tube heat exchanger of assembling, capillary fiber can accumulate on the fin, passage and reduction surface film thermal conductance.Therefore, dried tail gas waste heat can't effectively reclaim in the existing viscose stoving process, has caused great energy waste.
Summary of the invention
The objective of the invention is for overcoming the deficiency of above-mentioned prior art, a kind of oven dry and adjusting technology and device of viscose are provided, it can be dried and obtain more high-quality viscose, but the dry run energy efficient reaches 35~40% simultaneously.
For realizing above-mentioned purpose, the present invention adopts following technical proposals:
A kind of oven dry of viscose and adjusting technology, step is following:
1) viscose is delivered in the superheat steam drying device in proparea to machine by feeding; Under the circulating fan effect, delivered to through the first balanced ventilation device by the drying medium of 70~100 ℃ of steam pipe coil heating backs in the hothouse of superheat steam drying device in proparea, in order to the oven dry viscose; Viscose is able to dry water evaporates simultaneously; Pressure in the superheat steam drying device raises, and pressure controller links with air-introduced machine, and the steam of allowance is expelled to the oscillating flow heat pipe heat exchanger;
2) under the chain conveyor effect; The superheat steam drying device in district during viscose is sent to; Dry run is similar with the proparea; Difference only is that the heated temperature of drying medium is different, and middle district drying medium temperature is 100~120 ℃, and the while also is expelled to the oscillating flow heat pipe heat exchanger with the steam of allowance;
3) with reclaiming the new wind that gained steam heating fresh air obtains in the oscillating flow heat pipe heat exchanger; Deliver in the hot-air drier of back zone through the second balanced ventilation device by second pressure fan; In order to accomplish the depth drying and the adjusting of viscose; Viscose after finally obtaining drying, dried tail gas emptying.
The superheat steam drying device in He Zhong district, said proparea utilizes the superheated steam indirect; The circulation of circulating fan repeated multiple times is established in inside, and the dry exhaust steam of this moment is pure steam, does not contain incoagulable gas; Utilize oscillating flow heat pipe heat exchanger recovery waste heat again; Dry exhaust steam to frozen state, discharge a large amount of gasification latent heats, so most waste heats of exhaust steam can reclaim effectively after recuperation of heat.
The oscillating flow heat pipe heat exchanger reclaims gained steam heating fresh air to 60~70 ℃ in the said step 3), and the fresh air after heating directly is delivered to the hot-air drier drying of the back zone of viscose by blower fan, satisfy the required dry demand in back zone fully.
A kind of oven dry of viscose and adjusting device; Comprise and feeding to machine; Feed corresponding with dry governor motion to machine; Be provided with chain conveyor in the dry governor motion, the steam outlet in the He Zhong district, proparea of dry governor motion all links to each other with the air inlet of oscillating flow heat pipe heat exchanger, and the air outlet of oscillating flow heat pipe heat exchanger is connected with the back zone of dry governor motion.
Said dry governor motion comprises the He Zhong district, proparea that is made up of two superheat steam drying devices that are connected side by side at least; And the back zone of forming by hot-air drier; Said chain conveyor runs through proparea, middle district and back zone, and the chain conveyor bottom is equipped with the superheated steam device in the He Zhong district, said proparea.
Said superheated steam device comprises circulating fan, and said circulating fan air outlet communicates with steam(-)coil, and the air outlet of steam(-)coil communicates with some first balanced ventilation devices, and the first balanced ventilation device is positioned at the chain conveyor bottom; Be connected with the temperature control automatic regulating valve on the steam(-)coil.
Be provided with second pressure fan in the said back zone, the air inlet of second pressure fan communicates with the air outlet of oscillating flow heat pipe heat exchanger, and the air outlet of said second pressure fan communicates with some second balanced ventilation devices.
The steam outlet in He Zhong district, said proparea is provided with pressure controller with the pipeline that the air inlet of oscillating flow heat pipe heat exchanger links to each other.
Linking to each other with air-introduced machine with first pressure fan respectively into and out of the air port of said oscillating flow heat pipe heat exchanger, said air-introduced machine links to each other with said pressure controller.
Heat exchange element in the said oscillating flow heat pipe heat exchanger is the capillary light pipe.
The present invention includes two superheat steam drying districts and a heated-air drying district, promptly existing curtain formula or drying cylinder formula drying machine drying process are improved, the He Zhong district no longer blasts fresh air in the proparea of drying; But utilize the superheated steam indirect; The circulation of circulating fan repeated multiple times is established in inside, drains into the oscillating flow heat pipe heat exchanger by exhaust fan after the steam pressure after the water evaporates in the drying unit reaches a certain setting value, and the dry exhaust steam of this moment is pure steam; Do not contain incoagulable gas; Therefore utilize oscillating flow heat pipe heat exchanger recovery waste heat effectively, dry exhaust steam can discharge a large amount of gasification latent heats to frozen state after recuperation of heat; Therefore most waste heats of exhaust steam can effectively reclaim; Main heat exchange element is the capillary light pipe in the oscillating flow heat pipe heat exchanger simultaneously, is difficult for the deposition capillary fiber, and tubing matter can effectively be resisted the oil of fiber drying process generation and the corrosion of faintly acid gas; Oscillating flow heat pipe heat exchanger heat exchange efficiency is high, form is flexible, is difficult for the drying system waste heat recovery that characteristic such as dust stratification especially is suitable for viscose staple fibre.
In addition, the oscillating flow heat pipe heat exchanger reclaims the gained waste heat in order to the heating fresh air, and the fresh air after heating directly is delivered to the back zone drying of viscose by blower fan, can satisfy 60~70 ℃ required dry demand of back zone fully.
Balanced ventilation device among the present invention, chain conveyor, temperature control automatic regulating valve are existing equipment, repeat no more at this.
The invention has the beneficial effects as follows; Pure superheat steam drying technology after improving; Can effectively improve the drying quality of viscose staple fibre, a large amount of waste heats of dry exhaust steam simultaneously are able to effective recovery, and the waste heat after the recovery is in order to the heating fresh air; Hot-air is used for the heated-air drying of back zone, and the novel dried technology after improving can be practiced thrift energy consumption for drying about 35~40%.
Description of drawings
Fig. 1 is a system flow chart of the present invention;
1-superheat steam drying device wherein, 2-hot-air drier, 3-pressure controller, 4-steam(-)coil; The 5-circulating fan, 6-air-introduced machine, 7-oscillating flow heat pipe heat exchanger, the 8-first balanced ventilation device; 9-feeds to machine, 10-chain conveyor, 11-first pressure fan; 12-second pressure fan, 13-temperature control automatic regulating valve, the 14-second balanced ventilation device.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Shown in accompanying drawing 1: the oven dry of viscose and adjusting device; Comprise and feeding to machine 9; Feed corresponding with dry governor motion to machine 9; Be provided with chain conveyor 10 in the dry governor motion, the steam outlet in the He Zhong district, proparea of dry governor motion all links to each other with the air inlet of oscillating flow heat pipe heat exchanger 7, and the air outlet of oscillating flow heat pipe heat exchanger 7 is connected with the back zone of dry governor motion.
Dry governor motion comprises the He Zhong district, proparea that is made up of two superheat steam drying devices 1 that are connected side by side at least; And the back zone of forming by hot-air drier 2; Said chain conveyor 10 runs through proparea, middle district and back zone, and chain conveyor 10 bottoms are equipped with the superheated steam device in the He Zhong district, said proparea.
The superheated steam device comprises circulating fan 5, and said circulating fan air outlet communicates with steam(-)coil 4, and the air outlet of Steam Heating dish 4 pipes communicates with some first balanced ventilation devices 8, and the first balanced ventilation device 8 is positioned at chain conveyor 10 bottoms; Be connected with temperature control automatic regulating valve 13 on the steam(-)coil 4.
The air inlet that is provided with second pressure fan, 12, the second pressure fans 12 in the back zone communicates with the air outlet of oscillating flow heat pipe heat exchanger 7, and the air outlet of said second pressure fan 12 communicates with some second balanced ventilation devices 14.The steam outlet in He Zhong district, proparea is provided with pressure controller 3 with the pipeline that the air inlet of oscillating flow heat pipe heat exchanger 7 links to each other.
Linking to each other with air-introduced machine 6 with first pressure fan 11 respectively into and out of the air port of oscillating flow heat pipe heat exchanger 7, said air-introduced machine 6 links to each other with said pressure controller 3.Heat exchange element in the oscillating flow heat pipe heat exchanger 7 is the capillary light pipe.
Oven dry of the present invention is following with adjusting technology:
It comprises at least 2 superheat steam drying devices 1 (proparea He Zhong district) and 1 hot-air drier 2 (back zone), and viscose is accomplished the dry continued of main heating power and in hot-air drier 2, carried out depth drying and adjusting in two superheat steam drying devices 1.
Viscose, is delivered in the hothouse through the first balanced ventilation device 8 by the drying medium (70~100 ℃) after steam pipe coil 4 heating under circulating fan 5 effects by feeding the proparea of delivering to superheat steam drying device 1 to machine 9; In order to the oven dry viscose; Viscose is able to dry water evaporates simultaneously, and the pressure in the superheat steam drying device 1 raises, pressure controller 3 and air-introduced machine 6 interlocks; The steam of allowance is expelled to oscillating flow heat pipe heat exchanger 7
Under chain conveyor 10 effects; Viscose is sent to the middle district of superheat steam drying device 1; Dry run is similar with the proparea, and difference only is that the heated temperature of drying medium is different, and middle district drying medium temperature is about 100~120 ℃; While also is expelled to oscillating flow heat pipe heat exchanger 7 with the steam of allowance
The new wind of oscillating flow heat pipe heat exchanger 7 heating is delivered in the hot-air drier 7 through the second balanced ventilation device 14 by second pressure fan 12, in order to accomplish the depth drying and the adjusting of viscose, dried tail gas emptying.
Though the above-mentioned accompanying drawing specific embodiments of the invention that combines is described; But be not restriction to protection domain of the present invention; One of ordinary skill in the art should be understood that; On the basis of technical scheme of the present invention, those skilled in the art need not pay various modifications that creative work can make or distortion still in protection scope of the present invention.

Claims (10)

1. the oven dry of a viscose and adjusting technology is characterized in that step is following:
1) viscose is delivered in the superheat steam drying device in proparea to machine by feeding; Under the circulating fan effect, delivered to through the first balanced ventilation device by the drying medium of 70~100 ℃ of steam pipe coil heating backs in the hothouse of superheat steam drying device in proparea, in order to the oven dry viscose; Viscose is able to dry water evaporates simultaneously; Pressure in the superheat steam drying device raises, and pressure controller links with air-introduced machine, and the steam of allowance is expelled to the oscillating flow heat pipe heat exchanger;
2) under the chain conveyor effect; The superheat steam drying device in district during viscose is sent to; Dry run is similar with the proparea; Difference only is that the heated temperature of drying medium is different, and middle district drying medium temperature is 100~120 ℃, and the while also is expelled to the oscillating flow heat pipe heat exchanger with the steam of allowance;
3) with reclaiming the new wind that gained steam heating fresh air obtains in the oscillating flow heat pipe heat exchanger; Deliver in the hot-air drier of back zone through the second balanced ventilation device by second pressure fan; In order to accomplish the depth drying and the adjusting of viscose; Viscose after finally obtaining drying, dried tail gas emptying.
2. technology as claimed in claim 1 is characterized in that, the vapours drier in He Zhong district, said proparea utilizes the superheated steam indirect; The circulation of circulating fan repeated multiple times is established in inside; This moment dry exhaust steam be pure steam, utilize oscillating flow heat pipe heat exchanger recovery waste heat again, dry exhaust steam after recuperation of heat to frozen state; Discharge a large amount of gasification latent heats, so most waste heats of exhaust steam can reclaim effectively.
3. technology as claimed in claim 1; It is characterized in that; The oscillating flow heat pipe heat exchanger reclaims gained steam heating fresh air to 60~70 ℃ in the said step 3); Fresh air after heating directly is delivered to the hot-air drier drying of the back zone of viscose by blower fan, satisfy the required dry demand in back zone fully.
4. like the device of each said technology among the claim 1-3; It is characterized in that; Comprise and feeding to machine, hello corresponding to machine with dry governor motion, be provided with chain conveyor in the dry governor motion; The steam outlet in the He Zhong district, proparea of dry governor motion all links to each other with the air inlet of oscillating flow heat pipe heat exchanger, and the air outlet of oscillating flow heat pipe heat exchanger is connected with the back zone of dry governor motion.
5. device as claimed in claim 4; It is characterized in that; Said dry governor motion comprises the He Zhong district, proparea that is made up of two superheat steam drying devices that are connected side by side at least; And the back zone of forming by hot-air drier, said chain conveyor runs through proparea, middle district and back zone, and the chain conveyor bottom is equipped with the superheated steam device in the He Zhong district, said proparea.
6. device as claimed in claim 4; It is characterized in that; Said superheated steam device comprises circulating fan; Said circulating fan air outlet communicates with steam(-)coil, and the air outlet of steam(-)coil communicates with some first balanced ventilation devices, and the first balanced ventilation device is positioned at the chain conveyor bottom; Be connected with the temperature control automatic regulating valve on the steam(-)coil.
7. device as claimed in claim 4 is characterized in that, is provided with second pressure fan in the said back zone, and the air inlet of second pressure fan communicates with the air outlet of oscillating flow heat pipe heat exchanger, and the air outlet of said second pressure fan communicates with some second balanced ventilation devices.
8. device as claimed in claim 4 is characterized in that, the steam outlet in He Zhong district, said proparea is provided with pressure controller with the pipeline that the air inlet of oscillating flow heat pipe heat exchanger links to each other.
9. device as claimed in claim 8 is characterized in that, the linking to each other with air-introduced machine with first pressure fan respectively into and out of the air port of said oscillating flow heat pipe heat exchanger, said air-introduced machine links to each other with said pressure controller.
10. device as claimed in claim 4 is characterized in that, the heat exchange element in the said oscillating flow heat pipe heat exchanger is the capillary light pipe.
CN201210318519.5A 2012-08-31 2012-08-31 Drying and adjusting process and device for viscose fibers Active CN102797064B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103409957A (en) * 2013-08-29 2013-11-27 宜宾丝丽雅股份有限公司 Drying process in viscose staple fiber production
CN103422290A (en) * 2013-08-29 2013-12-04 宜宾丝丽雅股份有限公司 High-capacity viscose staple fiber post-treatment production line
CN104372551A (en) * 2014-10-20 2015-02-25 宜宾丝丽雅股份有限公司 Thermal energy recycling process based on viscose staple fiber drying waste heat
CN106012061A (en) * 2016-06-22 2016-10-12 成都丽雅纤维股份有限公司 Pre-drying process for viscose staple fibers

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103409957A (en) * 2013-08-29 2013-11-27 宜宾丝丽雅股份有限公司 Drying process in viscose staple fiber production
CN103422290A (en) * 2013-08-29 2013-12-04 宜宾丝丽雅股份有限公司 High-capacity viscose staple fiber post-treatment production line
CN103409957B (en) * 2013-08-29 2015-04-22 宜宾丝丽雅股份有限公司 Drying process in viscose staple fiber production
CN103422290B (en) * 2013-08-29 2015-07-01 宜宾丝丽雅股份有限公司 High-capacity viscose staple fiber post-treatment production line
CN104372551A (en) * 2014-10-20 2015-02-25 宜宾丝丽雅股份有限公司 Thermal energy recycling process based on viscose staple fiber drying waste heat
CN104372551B (en) * 2014-10-20 2016-04-06 宜宾丝丽雅股份有限公司 Based on the heat energy recycling technique of short rayon fiber drying waste heat
CN106012061A (en) * 2016-06-22 2016-10-12 成都丽雅纤维股份有限公司 Pre-drying process for viscose staple fibers

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