CN101149213A - Exhaust-free highly-effective drying system and method - Google Patents

Exhaust-free highly-effective drying system and method Download PDF

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Publication number
CN101149213A
CN101149213A CNA2007100472854A CN200710047285A CN101149213A CN 101149213 A CN101149213 A CN 101149213A CN A2007100472854 A CNA2007100472854 A CN A2007100472854A CN 200710047285 A CN200710047285 A CN 200710047285A CN 101149213 A CN101149213 A CN 101149213A
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China
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exhaust
solution
drying
regenerative
dehumidifying
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CNA2007100472854A
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CN100557357C (en
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赵敬德
刘妮
亢燕铭
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Donghua University
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Donghua University
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Abstract

This invention relates to a non gas discharging high efficient drying system and its method. The discharged gas from dryer is firstly filtered and purified by filtering purification device. The generated heat energy is used to heating the dilute solution after dehumidifying in solution regenerating device. It fulfills the regeneration of concentrated solution. At the same time, part of the water vapor in the discharged gas separates out and becomes condensing water. It reduces the moisture content of discharged gas. Then, in heat regenerating device, the heat energy of the discharged gas from solution regenerator is used to heating the dry air after dehumidifying. It reduces the temperature, humidify and enthalpy of the wet air entering into dehumidifying device. In the dehumidifying device, the wet air undertakes solution dehumidifying processing. The dry air after dehumidifying enters into the heat regenerating device for initial heating. Then, the air passes through heating device in order to reach the parameter request of drying technique. At last, the dry air enters into the dryer to dry the materials. This invention saves energy and protects environment.

Description

A kind of exhaust-free highly-effective drying system and method
Technical field
The present invention relates to the drying technical field, particularly relate to a kind of exhaust-free highly-effective drying system and method.
Background technology
The drying technology is widely used in multiple industrial and agricultural productions such as weaving, chemical industry, dyeing and finishing, food, pharmacy, papermaking.In general drying technology, the humid air behind the drying is by directly emptying.Though because the humid air of discharging has certain temperature, generally can not directly be utilized, therefore mostly be direct emptying.
At present, people have also proposed many Waste Heat Recovery technology and have reclaimed heat energy in the exhaust.Such as, in the document [R.Tugrul, Ogulata.Utilization of waste-heat recovery in textile drying.Applied Energy 79 (2004) 41-49], drying system has as shown in Figure 1 been proposed.Because extraction flow equates with the new wind flow of replenishing, but delivery temperature T e>new wind-warm syndrome degree T Fl, the water capacity of exhaust is also greater than new wind, thus the enthalpy of exhaust greater than new wind enthalpy, still there is the waste of energy in this system.
Also have the researcher to propose to utilize the drying system of heat pump techniques.Such as document [Fang Lingxing, Wang Lei. the feasibility study of heat pump drying system in the textile industry. air conditioner refrigerating and electric machinery, 2005 (4) total the 104th phases, the 26th the volume, 50-52,63] in, open type, semi-open type, enclosed and 3 kinds of systems of accurate closed cycle have been proposed.Thereby take away heat, so all there is the certain energy waste because open type and semi-open type system all have exhaust to discharge.Its closed system as shown in Figure 2.Though there is not waste-heat rejection in closed system, when condensation heat greater than evaporimeter from exhaust, absorb hot the time, the temperature of hothouse is constantly risen, if when the hothouse temperature surpasses designing requirement, these waste heats just need to solve.Accurate closed circulation system as shown in Figure 3, though this system has avoided the problem that the unnecessary waste heat of closed system need be discharged among Fig. 2, as can be seen from Figure 3, in the exhaust of hothouse, some is not carry out cooling and dehumidifying through evaporimeter.So some surplus wetting is not removed in the exhaust of hothouse, this will have influence on the drying effect of hothouse.In addition, adopting in the dry technology of heat pump, is to carry out the processing means of heat again by dehumidification by condensation and then to air, in the process that cooling heats up again, also exists certain energy waste so earlier.Also have, the heat pump drying system is owing to be subjected to the restriction in operating temperature interval, and general high temperature heat pump unit is also just at 85 ℃, is difficult to reach for 100 ℃~200 ℃ temperature requirement of drying technological requirement.
Summary of the invention
In order to solve that exhaust heat in the above drying system can not all reclaim and the dehumidification by condensation energy dissipation problem in the thermal process again, the present invention adopts the solution dehumidification technology, exhaust behind the drying dehumidified again utilize, thereby both avoided exhaust to take away the problem of waste heat, solved the dehumidification by condensation energy dissipation of heat more again.Can be widely used in weaving, chemical industry, the energy, mechanical field.
The technical solution adopted for the present invention to solve the technical problems is: a kind of exhaust-free highly-effective drying system and method are provided, comprise drier, also comprise
(1) filtering and purifying: the exhaust of filtration, purification drier;
(2) regenerative device of solution: the weak solution behind the heat energy heating and dehumidification in the utilization purification final vacuum, realize the regeneration of concentrated solution, a part of water vapour is separated out and is condensate water in the exhaust simultaneously, has reduced the water capacity of exhaust;
(3) regenerative apparatus: utilize the dry air behind the heat energy heating and dehumidification in the exhaust of solution regenerator, reduce temperature, humidity and the enthalpy of the humid air that enters dehydrating unit;
(4) dehydrating unit: humid air is carried out solution dehumidification handle, the dry air after the dehumidifying enters regenerative apparatus again and tentatively heats;
(5) heater: heating makes its parameter request that reaches drying technology through regenerative apparatus preliminarily heated dry air, and dry air enters drier material is carried out drying then.
Described filtering and purifying adopts sack cleaner.
Described regenerative device of solution adopts evaporating heat exchanger.
Described regenerative apparatus adopts plate to stick up the formula total-heat exchanger.
Described dehydrating unit adopts the fountain absorption plant.
Described heater adopts the heater that power is little, energy consumption is low.
No exhaust drying system and method proposed by the invention are that the exhaust to drying plant directly purifies, dehumidification treatments, make the air after the processing reach the requirement that utilizes again.In processing procedure, reclaim simultaneously wherein energy to be used for drying system itself.
If this drying system is carried out whole energy spectrometer, as can be seen, the energy heater that drops in this system add heat, and the heat of the discharging heat that to be the saturated vapor of discharging in the regenerative device of solution take away.This process is equivalent to be evaporated out in regenerative device of solution by the contained moisture of drying material, and the humid air that carries moisture is not discharged from this process, does not also just have the energy loss of this part.
Realization of the present invention will reach energy-conservation and double effects environmental protection simultaneously.Because this drying system does not have waste gas to discharge, thereby the energy had so both been saved in the loss that can not have surplus heat, and had reduced atmosphere pollution and thermal pollution to environment again.And the air humidity that enters drying plant can be controlled in the desirable data area, thereby can obtain than higher dry efficiency and drying effect.
The present invention can be applied in the system reform of textile mills' heat setting machine.The delivery temperature of heat setting machine is generally 160~180 ℃, exhaust steam moisture 5~20%.How utilizing this part heat is energy-conservation emphasis.Adopt no exhaust drying system proposed by the invention, can avoid discharge loss.
Description of drawings
Fig. 1 residual heat recovery type drying system.
The closed cycle of Fig. 2 heat pump drying system.
The accurate closed cycle of Fig. 3 heat pump drying system.
Wherein:
C---condenser D---hothouse
E---evaporimeter F---auxiliary condenser
Fig. 4 schematic diagram of the present invention.
Solid line is represented the loop of humid air among Fig. 4, and chain-dotted line is represented the loop of dehumidification solution.
The specific embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
As shown in Figure 4, exhaust-free highly-effective drying system provided by the present invention and method, this system are provided with two closed circuits: humid air loop and solution loop.In the humid air loop, the high temperature humid air of drying plant discharging at first carries out filtration, purification in filtering and purifying; In regenerative device of solution, the weak solution behind the heat energy heating and dehumidification in the utilization purification final vacuum realizes the regeneration of concentrated solution then, and a part of water vapour is separated out and is condensate water in the exhaust simultaneously, reduces the water capacity of exhaust; Subsequently in regenerative apparatus, utilize the dry air behind the heat energy heating and dehumidification in the exhaust of solution regenerator, reduce temperature, humidity and the enthalpy of the humid air that enters dehydrating unit, improve effect on moisture extraction, improve the temperature and the enthalpy of dehumidifying back dry air simultaneously; Then in dehydrating unit, humid air is carried out solution dehumidification handle; Dry air after the dehumidifying after going into the preliminary heating of regenerative apparatus, reaches the parameter request of drying technology again through the heating of heater; Last dry air enters drier material is carried out drying.In solution loop, the regeneration of concentrated solution is to utilize the drying plant high-temperature exhaust air fully, and in solution dehumidification device, the non-refrigerated adiabatic dehumidification process that carries out.Solid line is represented the loop of humid air among Fig. 4, and chain-dotted line is represented the loop of dehumidification solution.

Claims (6)

1. exhaust-free highly-effective drying system and method comprise drier, it is characterized in that: also comprise
(1) filtering and purifying: the exhaust of filtration, purification drier;
(2) regenerative device of solution: the weak solution behind the heat energy heating and dehumidification in the utilization purification final vacuum, realize the regeneration of concentrated solution, a part of water vapour is separated out and is condensate water in the exhaust simultaneously, reduces the water capacity of exhaust;
(3) regenerative apparatus: utilize the dry air behind the heat energy heating and dehumidification in the exhaust of solution regenerator, reduce temperature, humidity and the enthalpy of the humid air that enters dehydrating unit, reduce the energy that heater consumes simultaneously, thus the energy of the total input of reduction system;
(4) dehydrating unit: humid air is carried out solution dehumidification handle, the dry air after the dehumidifying enters regenerative apparatus again and tentatively heats;
(5) heater: heating makes its parameter request that reaches drying technology through regenerative apparatus preliminarily heated dry air, and dry air enters drier material is carried out drying then.
2. a kind of exhaust-free highly-effective drying system according to claim 1 and method is characterized in that: described filtering and purifying adopts sack cleaner.
3. a kind of exhaust-free highly-effective drying system according to claim 1 and method is characterized in that: described regenerative device of solution is an evaporating heat exchanger.
4. a kind of exhaust-free highly-effective drying system according to claim 1 and method is characterized in that: described regenerative apparatus adopts plate to stick up the formula total-heat exchanger.
5. a kind of exhaust-free highly-effective drying system according to claim 1 and method is characterized in that: described dehydrating unit is the fountain absorption plant.
6. according to described a kind of exhaust-free highly-effective drying system of claim 1~5 and method, it is characterized in that: described heater adopts the heater that power is little, energy consumption is low.
CNB2007100472854A 2007-10-19 2007-10-19 A kind of exhaust-free highly-effective drying system and method Expired - Fee Related CN100557357C (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101865600A (en) * 2010-06-28 2010-10-20 长沙楚天科技有限公司 Oven for tunnel sterilizing and drying machine
CN102049178A (en) * 2009-11-09 2011-05-11 株式会社松井制作所 Dehumidifying device
CN102803882A (en) * 2009-06-04 2012-11-28 松下电器产业株式会社 Drying device
CN102809276A (en) * 2012-08-14 2012-12-05 浙江大学 Energy recovery method and device used for drying system
CN102829617A (en) * 2012-09-20 2012-12-19 张家港市苏承环保设备有限公司 Waste gas heat energy environmental-friendly comprehensive utilization device
CN103604288A (en) * 2013-11-20 2014-02-26 四川双亿实业有限公司 Totally-enclosed double-effect heat recycling double-source ultrahigh-temperature heat pump dryer and method for implementing same
CN105300079A (en) * 2015-11-20 2016-02-03 浙江大学 Dehumidifying device with vortex tube
CN105940271A (en) * 2014-01-31 2016-09-14 大金工业株式会社 Ventilation device
CN106595239A (en) * 2017-01-16 2017-04-26 李德生 Air energy heat pump dryer for agricultural and sideline products
CN110986486A (en) * 2019-11-07 2020-04-10 浙江工业大学 Closed cycle drying system based on two-stage solution dehumidification

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102803882A (en) * 2009-06-04 2012-11-28 松下电器产业株式会社 Drying device
CN102049178B (en) * 2009-11-09 2015-04-01 株式会社松井制作所 Dehumidifying device
CN102049178A (en) * 2009-11-09 2011-05-11 株式会社松井制作所 Dehumidifying device
CN101865600B (en) * 2010-06-28 2012-05-23 楚天科技股份有限公司 Oven for tunnel sterilizing and drying machine
CN101865600A (en) * 2010-06-28 2010-10-20 长沙楚天科技有限公司 Oven for tunnel sterilizing and drying machine
CN102809276B (en) * 2012-08-14 2014-12-10 浙江大学 Energy recovery method and device used for drying system
CN102809276A (en) * 2012-08-14 2012-12-05 浙江大学 Energy recovery method and device used for drying system
CN102829617A (en) * 2012-09-20 2012-12-19 张家港市苏承环保设备有限公司 Waste gas heat energy environmental-friendly comprehensive utilization device
CN103604288A (en) * 2013-11-20 2014-02-26 四川双亿实业有限公司 Totally-enclosed double-effect heat recycling double-source ultrahigh-temperature heat pump dryer and method for implementing same
CN103604288B (en) * 2013-11-20 2015-09-02 四川双亿实业有限公司 Totally enclosed type economic benefits and social benefits recuperation of heat double source superhigh temperature heat pump dryer and its implementation
CN105940271A (en) * 2014-01-31 2016-09-14 大金工业株式会社 Ventilation device
CN105940271B (en) * 2014-01-31 2017-05-03 大金工业株式会社 Ventilation device
CN105300079A (en) * 2015-11-20 2016-02-03 浙江大学 Dehumidifying device with vortex tube
CN106595239A (en) * 2017-01-16 2017-04-26 李德生 Air energy heat pump dryer for agricultural and sideline products
CN110986486A (en) * 2019-11-07 2020-04-10 浙江工业大学 Closed cycle drying system based on two-stage solution dehumidification
CN110986486B (en) * 2019-11-07 2021-07-30 浙江工业大学 Closed cycle drying system based on two-stage solution dehumidification

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