CN102797064B - 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
CN102797064B
CN102797064B CN201210318519.5A CN201210318519A CN102797064B CN 102797064 B CN102797064 B CN 102797064B CN 201210318519 A CN201210318519 A CN 201210318519A CN 102797064 B CN102797064 B CN 102797064B
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steam
drying
dry
heat pipe
air
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CN102797064A (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 process and device
Technical field
The present invention relates to a kind of oven dry of viscose and adjusting process and device.
Background technology
Viscose is regarded as the industry of high pollution, highly energy-consuming, high cost always, current China viscose output accounts for 60% of world wide production, the energy consumption brought thus and blowdown increase, and energy consumption and environmental issue become one of restriction China viscose glue industry " bottleneck " sex chromosome mosaicism fast-developing further.Wherein, the overall energy consumption level of viscose glue industry exceeds 10 ~ 30% than international most advanced level, and this external disposal of waste gas, water and industrial residue aspect also exists a lot of problem.Therefore, energy-conservation, reduction of discharging has become the core work of viscose glue industry value chain.
In viscose industry, dryer is one of highly energy-consuming equipment, also be the emphasis of energy-saving and emission-reduction, what usually adopt at present is common warm-air type dryer, dry 1 ton of viscose and about consume 2.8 tons of steam, dried tail gas temperature is about 110 DEG C, water vapour content about 60 ~ 70%, the direct emptying one side of tail gas carrying a large amount of waste heat causes huge energy waste, causes serious environmental pollution on the other hand.
The oven dry of viscose and adjustment, usually adopt curtain or dry cylinder drying machine subregion stage drying, proparea drying medium temperature is 70 ~ 100 DEG C; 100 ~ 120 DEG C, middle district; 60 ~ 70 DEG C, back zone; Then the damping stage is entered.The wet fiber of shredding is delivered on sheet convoying curtain by feeding to machine, keep the fiber floor height about 100 millimeters on convoying curtain, translational speed is 0.82 ~ 3.7 m/min, pressure fan blasts fresh air, air-heater blasts high steam simultaneously, discharged by exhaust fan by after the repeated multiple times circulation of circulating fan, this drying course mesohigh vapours plays the effect that heat temperature raising makes moisture vaporization again, and fresh air plays takes wet effect.In this traditional drying system, dried tail gas effectively cannot carry out waste heat recovery, its main cause has two aspects: first, the drying medium utilized in these three sections is the mist of steam and air, dried tail gas contains a large amount of incoagulable gas, and air specific heat is little, after being assembled with heat exchanger, also fraction dried tail gas sensible heat only can be reclaimed; The second, can carry capillary fiber secretly in the drying course dried tail gas of viscose, if assemble common fin-tube heat exchanger, capillary fiber can accumulate on fin, passage and reduce surface film thermal conductance.Therefore, in existing viscose stoving process, dried tail gas waste heat cannot effectively reclaim, and causes great energy waste.
Summary of the invention
The object of the invention is for overcoming above-mentioned the deficiencies in the prior art, provide a kind of oven dry of viscose and adjusting process and device, it can dry the viscose obtaining more high-quality, and dry run energy efficient can reach 35 ~ 40% simultaneously.
For achieving the above object, the present invention adopts following technical proposals:
The oven dry of viscose and an adjusting process, step is as follows:
1) viscose is delivered in the superheat steam drying device in proparea by feeding to machine, under circulating fan effect, delivered in the hothouse of superheat steam drying device in proparea by the drying medium of 70 ~ 100 DEG C after steam-coil-heater through the first balanced ventilation device, in order to dry viscose, viscose is able to the evaporation of dry moisture simultaneously, pressure in superheat steam drying device raises, and pressure controller and air-introduced machine link, and the steam of allowance is expelled to Oscillatory flow heat pipe exchanger;
2) under chain conveyor effect, viscose is sent to the superheat steam drying device in middle district, dry run is similar to proparea, difference is only that drying medium is different by the temperature heated, middle district drying medium temperature is 100 ~ 120 DEG C, also the steam of allowance is expelled to Oscillatory flow heat pipe exchanger simultaneously;
3) the new wind will gained steam heating fresh air be reclaimed in Oscillatory flow heat pipe exchanger obtaining, deliver in the hot-air drier of back zone by the second pressure fan through the second balanced ventilation device, in order to complete depth drying and the adjustment of viscose, finally obtain the viscose after drying, dried tail gas is emptying.
The superheat steam drying device in described proparea and middle district utilizes superheated steam indirect, the repeated multiple times circulation of circulating fan is established in inside, dry exhaust steam is now pure steam, not containing incoagulable gas, recycling Oscillatory flow heat pipe exchanger recovery waste heat, dry exhaust steam is to frozen state after recuperation of heat, and discharge a large amount of gasification latent heats, most waste heats of therefore exhaust steam can effectively reclaim.
In described step 3), Oscillatory flow heat pipe exchanger reclaims gained steam heating fresh air to 60 ~ 70 DEG C, and the fresh air after heating is directly delivered to the back zone of viscose hot-air drier by blower fan is dry, meets the dry demand needed for back zone completely.
A kind of oven dry of viscose and adjusting device, comprise and feeding to machine, feed corresponding with dry governor motion to machine, chain conveyor is provided with in dry governor motion, the dry proparea of governor motion is all connected with the air inlet of Oscillatory flow heat pipe exchanger with the steam outlet in middle district, and the air outlet of Oscillatory flow heat pipe exchanger is connected with the back zone of dry governor motion.
Described dry governor motion comprises the proparea and Zhong Qu that the superheat steam drying device that is at least connected side by side by two forms, and the back zone to be made up of hot-air drier, described chain conveyor runs through proparea, middle district and back zone, and in described proparea and middle district, chain conveyor bottom is equipped with superheated steam device.
Described superheated steam device comprises circulating fan, and described 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 chain conveyor bottom; Steam(-)coil is connected with temperature control automatic regulating valve.
Be provided with the second pressure fan in described back zone, the air inlet of the second pressure fan communicates with the air outlet of Oscillatory flow heat pipe exchanger, and the air outlet of described second pressure fan communicates with some second balanced ventilation devices.
The pipeline that described proparea is connected with the air inlet of Oscillatory flow heat pipe exchanger with the steam outlet in middle district is provided with pressure controller.
Being connected with air-introduced machine with the first pressure fan respectively into and out of air port of described Oscillatory flow heat pipe exchanger, described air-introduced machine is connected with described pressure controller.
Heat exchange element in described Oscillatory flow heat pipe exchanger is capillary light pipe.
The present invention includes Liang Ge superheat steam drying district and a heated-air drying district, namely existing curtain or baking cylinder drying machine drying process are improved, no longer fresh air is blasted in the proparea of drying and middle district, but utilize superheated steam indirect, the repeated multiple times circulation of circulating fan is established in inside, Oscillatory flow heat pipe exchanger is drained into by exhaust fan after steam pressure after moisture evaporation in drying unit reaches a certain setting value, dry exhaust steam is now pure steam, not containing incoagulable gas, therefore utilize Oscillatory flow heat pipe exchanger can recovery waste heat effectively, dry exhaust steam can to frozen state after recuperation of heat, discharge a large amount of gasification latent heats, therefore most waste heats of exhaust steam can effectively reclaim, in Oscillatory flow heat pipe exchanger, main heat exchange element is capillary light pipe simultaneously, not easily deposit capillary fiber, and tubing matter effectively can resist the oil of fiber drying process generation and the corrosion of faintly acid gas, Oscillatory flow heat pipe exchanger heat exchange efficiency is high, flexible form, not easily the characteristic such as dust stratification is especially suitable for the drying system waste heat recovery of viscose staple fibre.
In addition, Oscillatory flow heat pipe exchanger reclaims gained waste heat in order to heating fresh air, and the back zone that the fresh air after heating is directly delivered to viscose by blower fan is dry, can meet the dry demand of 60 ~ 70 DEG C needed for back zone completely.
Balanced ventilation device in the present invention, chain conveyor, temperature control automatic regulating valve are existing equipment, do not repeat them here.
The invention has the beneficial effects as follows, pure superheat steam drying technique after improving, effectively can improve the drying quality of viscose staple fibre, a large amount of waste heats of dry exhaust steam are simultaneously able to effective recovery, waste heat after recovery is in order to heating fresh air, hot-air is used for the heated-air drying of back zone, and the novel dried technique after improving can save energy consumption for drying about 35 ~ 40%.
Accompanying drawing explanation
Fig. 1 is present system flow chart;
Wherein 1-superheat steam drying device, 2-hot-air drier, 3-pressure controller, 4-steam(-)coil, 5-circulating fan, 6-air-introduced machine, 7-Oscillatory flow heat pipe exchanger, 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, 14-second balanced ventilation device.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further described.
As shown in Figure 1: the oven dry of viscose and adjusting device, comprise and feeding to machine 9, feed corresponding with dry governor motion to machine 9, chain conveyor 10 is provided with in dry governor motion, the dry proparea of governor motion is all connected with the air inlet of Oscillatory flow heat pipe exchanger 7 with the steam outlet in middle district, and the air outlet of Oscillatory flow heat pipe exchanger 7 is connected with the back zone of dry governor motion.
Dry governor motion comprises the proparea and Zhong Qu that the superheat steam drying device 1 that is at least connected side by side by two forms, and the back zone to be made up of hot-air drier 2, described chain conveyor 10 runs through proparea, middle district and back zone, and in described proparea and middle district, chain conveyor 10 bottom is equipped with superheated steam device.
Superheated steam device comprises circulating fan 5, and described circulating fan air outlet communicates with steam(-)coil 4, and the air outlet of Steam Heating dish 4 pipe communicates with some first balanced ventilation devices 8, and the first balanced ventilation device 8 is positioned at chain conveyor 10 bottom; Steam(-)coil 4 is connected with temperature control automatic regulating valve 13.
The air inlet being provided with the second pressure fan 12, second pressure fan 12 in back zone communicates with the air outlet of Oscillatory flow heat pipe exchanger 7, and the air outlet of described second pressure fan 12 communicates with some second balanced ventilation devices 14.The pipeline that proparea is connected with the air inlet of Oscillatory flow heat pipe exchanger 7 with the steam outlet in middle district is provided with pressure controller 3.
Being connected with air-introduced machine 6 with the first pressure fan 11 respectively into and out of air port of Oscillatory flow heat pipe exchanger 7, described air-introduced machine 6 is connected with described pressure controller 3.Heat exchange element in Oscillatory flow heat pipe exchanger 7 is capillary light pipe.
Oven dry of the present invention and adjusting process as follows:
It comprises at least 2 superheat steam drying device 1(propareas and Zhong Qu) and 1 hot-air drier 2(back zone), viscose continues complete main heat-force dry in two superheat steam drying devices 1 after to carry out depth drying and adjustment in hot-air drier 2.
The proparea of superheat steam drying device 1 delivered to by viscose to machine 9 by feeding, under circulating fan 5 acts on, drying medium (70 ~ 100 DEG C) after being heated by steam pipe coil 4 is delivered in hothouse through the first balanced ventilation device 8, in order to dry viscose, viscose is able to the evaporation of dry moisture simultaneously, and the pressure in superheat steam drying device 1 raises, and pressure controller 3 and air-introduced machine 6 link, the steam of allowance is expelled to Oscillatory flow heat pipe exchanger 7
Under chain conveyor 10 acts on, viscose is sent to the middle district of superheat steam drying device 1, dry run is similar to proparea, difference is only that drying medium is different by the temperature heated, middle district drying medium temperature is about 100 ~ 120 DEG C, also the steam of allowance is expelled to Oscillatory flow heat pipe exchanger 7 simultaneously
The new wind that Oscillatory flow heat pipe exchanger 7 heats, deliver in hot-air drier 7 by the second pressure fan 12 through the second balanced ventilation device 14, in order to complete depth drying and the adjustment of viscose, dried tail gas is emptying.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the 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 do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.

Claims (6)

1. the oven dry of viscose and an adjusting process, it is characterized in that, step is as follows:
1) viscose is delivered in the superheat steam drying device in proparea by feeding to machine, under circulating fan effect, delivered in the hothouse of superheat steam drying device in proparea by the drying medium of 70 ~ 100 DEG C after steam-coil-heater through the first balanced ventilation device, in order to dry viscose, viscose is able to the evaporation of dry moisture simultaneously, pressure in superheat steam drying device raises, and pressure controller and air-introduced machine link, and the steam of allowance is expelled to Oscillatory flow heat pipe exchanger;
2) under chain conveyor effect, viscose is sent to the superheat steam drying device in middle district, dry run is similar to proparea, difference is only that drying medium is different by the temperature heated, middle district drying medium temperature is 100 ~ 120 DEG C, also the steam of allowance is expelled to Oscillatory flow heat pipe exchanger simultaneously;
3) the new wind will gained steam heating fresh air be reclaimed in Oscillatory flow heat pipe exchanger obtaining, deliver in the hot-air drier of back zone by the second pressure fan through the second balanced ventilation device, in order to complete depth drying and the adjustment of viscose, finally obtain the viscose after drying, dried tail gas is emptying;
The superheat steam drying device in described proparea and middle district utilizes superheated steam indirect, the repeated multiple times circulation of circulating fan is established in inside, dry exhaust steam is now pure steam, recycling Oscillatory flow heat pipe exchanger recovery waste heat, dry exhaust steam after recuperation of heat to frozen state, discharge a large amount of gasification latent heats, most waste heats of therefore exhaust steam can effectively reclaim.
2. technique as claimed in claim 1, it is characterized in that, in described step 3), Oscillatory flow heat pipe exchanger reclaims gained steam heating fresh air to 60 ~ 70 DEG C, fresh air after heating is directly delivered to the back zone of viscose hot-air drier by blower fan is dry, meets the dry demand needed for back zone completely.
3. the device of technique according to any one of claim 1-2, it is characterized in that, comprise and feeding to machine, feed corresponding with dry governor motion to machine, chain conveyor is provided with in dry governor motion, the dry proparea of governor motion is all connected with the air inlet of Oscillatory flow heat pipe exchanger with the steam outlet in middle district, and the air outlet of Oscillatory flow heat pipe exchanger is connected with the back zone of dry governor motion;
Described dry governor motion comprises the proparea and Zhong Qu that the superheat steam drying device that is at least connected side by side by two forms, and the back zone to be made up of hot-air drier, described chain conveyor runs through proparea, middle district and back zone, and in described proparea and middle district, chain conveyor bottom is equipped with superheated steam device;
Described superheated steam device comprises circulating fan, and described 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 chain conveyor bottom; Steam(-)coil is connected with temperature control automatic regulating valve;
The pipeline that described proparea is connected with the air inlet of Oscillatory flow heat pipe exchanger with the steam outlet in middle district is provided with pressure controller.
4. device as claimed in claim 3, it is characterized in that, be provided with the second pressure fan in described back zone, the air inlet of the second pressure fan communicates with the air outlet of Oscillatory flow heat pipe exchanger, and the air outlet of described second pressure fan communicates with some second balanced ventilation devices.
5. device as claimed in claim 4, it is characterized in that, being connected with air-introduced machine with the first pressure fan respectively into and out of air port of described Oscillatory flow heat pipe exchanger, described air-introduced machine is connected with described pressure controller.
6. device as claimed in claim 3, it is characterized in that, the heat exchange element in described Oscillatory flow heat pipe exchanger is 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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Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
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
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
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
CN106012061B (en) * 2016-06-22 2018-06-19 成都丽雅纤维股份有限公司 A kind of prebaking technique for viscose staple fibre

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