CN105080346B - The membrane contactor of high mass transfer efficiency and efficient dehumidification system - Google Patents
The membrane contactor of high mass transfer efficiency and efficient dehumidification system Download PDFInfo
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- CN105080346B CN105080346B CN201510547268.1A CN201510547268A CN105080346B CN 105080346 B CN105080346 B CN 105080346B CN 201510547268 A CN201510547268 A CN 201510547268A CN 105080346 B CN105080346 B CN 105080346B
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Abstract
This application provides a kind of membrane contactor of high mass transfer efficiency and the dehumidification system based on the membrane contactor, membrane contactor is provided with cooling runner on the outside of solution runner, heat caused by solution runner can be quickly delivered to by heat-conducting plate in cooling runner, membrane contactor is exported by cooling runner, therefore the solution in solution runner will not heat up because mediator is absorbed, naturally also the transmission capacity of mediator therefore will not be reduced, ensure that the membrane contactor there can be higher mass transfer ability；The membrane contactor is applied into dehumidification system as dehumidifier, dehumidification solution then can effectively be avoided in the course of work that dehumidifies because absorbing caused temperature rise after vapor, ensuring the moisture pick-up properties of dehumidification solution will not decline, the wet-out property of the dehumidifier is effectively raised, namely improves the dehumidification rate of dehumidification system.
Description
Technical field
The invention is related to dehumidifying technology field, more particularly to a kind of membrane contactor of high mass transfer efficiency and efficiently dehumidifying
System.
Background technology
Air humidity is an important factor for influenceing air quality.Research shows that the suitable relative humidity of human body is 40-
60%, too high humidity environment can increase the discomfort of human body, and it is some viral and bacterium big to also result in interior of building
Amount breeding.China is located in Eurasia, and in face of the wide Pacific Ocean, heating power difference is huge between Hai Lu so that the big portion in China
Region-by-region monsoon type weather is notable, and especially summer is influenceed by from ocean warm moist air, and temperature is high and moist rainy, because
It is very necessary that this carries out dehumidification treatments to air.
Conventional air dehumidification method includes cooling method dehumidifying, solid absorbent dehumidifying and liquid desiccant dehumidifying.Cooling
Method dehumidifying is that humid air is cooled to below dew-point temperature, is removed after making the water vapor condensation in air from air.This method
Air need to be down to below dew-point temperature, ventilation state, high energy consumption are warming up to again after removing moisture.Solid absorbent dehumidifying is profit
Dehumidified with the method for some solid absorbent moisture absorptions.The disadvantage of this method is that the regeneration of these solid absorbents is tired
Difficulty, and device is complicated, and the volume ratio of equipment is huger, and cost is also high.Liquid desiccant dehumidifying is that have moisture absorption using some
Moisture that the solution of property comes in absorption air and reach dehumidifying purpose.Liquid dehumidifying regeneration is easy, and shortcoming is processing air and liquid
Body hygroscopic agent directly contacts, and easily causes air to carry hygroscopic agent secretly, further causes the corrosion of pipeline and equipment.
In recent years, with the development of membrane material, the liquid dehumidifying technology based on membrane contactor is developed faster.Membrane type
The principle of liquid dehumidifying is to make two kinds of fluids of gas-liquid be flowed respectively in membrane material both sides and form vapor pressure difference in membrane material both sides,
In the presence of water vapour pressure difference, vapor enters solution side by air side through film, so as to realize air dewetting.Membrane material mistake herein
The effect of screening is act as in journey, it only allows vapor to penetrate into opposite side from the side of film, and prevents other materials
Pass through.Gas-liquid fluid flows in the both sides of film respectively, and the caloic that vapor is only carried out by indirect mode exchanges, and avoids liquid
Drop entrainment phenomenon, so as to improve the quality of air.
At present, many dehumidification systems based on membrane contactor technology have been proposed in the industry, such as：Notification number is
CN101975421A Chinese invention patent application prospectus refer to what a kind of heat pump and liquid dehumidifying device was combined
Association system, it, as dehumidifier and regenerator, is realized to the continuous of air using parallel plate type and middle control fiber type membrane module
Dehumidifying；Notification number discloses one kind for CN203123788U Chinese invention patent application prospectus and uses hollow fibre filament
Processing of the higher low-temperature receiver of temperature to air can be achieved to the device of air dewetting in film；Notification number is in CN104190262A
State's invention patent application prospectus disclose a kind of oval hollow fiber membrane contactorses, sky for air humidity control
Gas dehumidification system and air moistening system, the heat and mass transfer enhancement of film runner improve the performance of system to a certain extent.This
In dehumidification system disclosed in a little patents, the dehumidifier of use is the membrane contactor of heat insulation-type, i.e. dehumidifier and heat exchange with outside
Efficiency is limited by larger.For in these dehumidifier courses of work, dehumidification solution absorbs meeting after vapor in dehumidifier
Discharge substantial amounts of latent heat, cause solution to heat up, and the temperature rise of dehumidification solution cause solution and membrane material contact surface vapour pressure and
Superficial air humidity increase, so as to reduce the moisture pick-up properties of solution.The wet-out property of dehumidifier is caused to decline to a great extent.
The content of the invention
The purpose of the invention is to avoid above-mentioned weak point of the prior art and providing one kind can avoid removing
The membrane contactor that wet solution is heated up because mediator is absorbed the problem of causing mass transfer ability to decline, so that having used the film
The dehumidification system of contactor can have higher dehumidification rate.
The purpose of the invention is achieved through the following technical solutions：
Provide a kind of membrane contactor of high mass transfer efficiency, including solution runner and air flow channel, the solution runner and
Be provided between air flow channel only has the membrane material of permeability to specific mass transfer, and system mass transfer is in membrane material towards solution flow passage side
Vapour pressure is less than vapour pressure of the membrane material towards air flow channel side, also includes the cooling runner to be cooled to solution runner, institute
Cooling runner is stated to be separated by heat-conducting plate with the solution runner.
Wherein, the cooling runner is arranged at the side of the solution runner away from air flow channel.
Wherein, the cooling falling liquid film of the inwall of runner formed with the flowing formed by cooling fluid.
Wherein, flowing has cooling air-flow in the cooling runner.
Wherein, the flow direction of falling liquid film is opposite with the flow direction for the air-flow that cools in the cooling runner.
Wherein, distributing fin, the distributing fin are provided with the solution runner, air flow channel and/or cooling runner
Including rectangle, triangle or sinusoidal pattern fin.
Efficient dehumidification system is also provided, including treats the dehumidifier that dehumidified air is dehumidified, on the dehumidifier is
The membrane contactor of any high mass transfer efficiency is stated, air to be dehumidified flows through the air flow channel of the dehumidifier, and dehumidification solution flows through
The solution runner.
Wherein, in addition to heater, regenerator and cooler, the dehumidification solution in the solution runner of the first membrane contactor according to
It is secondary flow through heater, regenerator and cooler after return in the solution runner of dehumidifier.
Wherein, in addition to the spray equipment that is arranged above dehumidifier, the spray equipment spray towards the dehumidifier
So that the cooling runner inner wall of the dehumidifier forms the falling liquid film of flowing.
Wherein, described in regenerator is heat insulation-type membrane contactor.
The beneficial effect of the invention：Connect this application provides a kind of membrane contactor of high mass transfer efficiency and based on the film
The dehumidification system of tentaculum, membrane contactor are provided with cooling runner on the outside of solution runner, and heat caused by solution runner can be through
Cross heat-conducting plate to be quickly delivered in cooling runner, membrane contactor is exported by cooling runner, therefore the solution in solution runner is not
It can be heated up because mediator is absorbed, naturally also therefore will not reduce the transmission capacity of mediator, ensure that the film contacts
Device can have higher mass transfer ability；The membrane contactor is applied into dehumidification system as dehumidifier, then can be effective
Dehumidification solution is avoided in the course of work that dehumidifies because absorbing caused temperature rise after vapor, it is ensured that the hygroscopicity of dehumidification solution
It can will not decline, effectively raise the wet-out property of the dehumidifier, namely improve the dehumidification rate of dehumidification system.
Brief description of the drawings
The invention is described further using accompanying drawing, but the embodiment in accompanying drawing is not formed to the invention
Any restrictions, on the premise of not paying creative work, can also be according to following attached for one of ordinary skill in the art
Figure obtains other accompanying drawings.
Fig. 1 is the structural representation of the embodiment 1 of the efficient dehumidification system of the invention.
Fig. 2 is the dehumidifier structural representation of the embodiment 1 of the efficient dehumidification system of the invention.
Fig. 3 is the structural representation of each runner group of the dehumidifier of the embodiment 1 of the efficient dehumidification system of the invention.
Fig. 4 is the dehumidifier structural representation of the embodiment 2 of the efficient dehumidification system of the invention.
Include in Fig. 1 into Fig. 4：
1 --- --- --- --- heater, 5 --- regenerator, 6 --- the 3rd of water pump, 4 of water tank, 3 of dehumidifier, 2
Air-introduced machine, 7 --- cooler, 8 --- fluid reservoir, 9 --- solution pump, 10 --- spray thrower, 11 --- second air-introduced machine,
12 --- the first air-introduced machine, 13 --- air flow channel, 14 --- solution runner, 15 --- cooling runner, 16 --- board-like membrane material,
17 --- --- falling liquid film, 19 --- cooling air-flow, 20 --- distributing fins of heat-conducting plate, 18.
Embodiment
The invention is further described with the following Examples.
Embodiment 1
One of embodiment of the efficient dehumidification system of the invention, as shown in figure 1, including：Dehumidifier 1, heating
Device 4, regenerator 5, cooler 7, fluid reservoir 8, solution pump 9, the first air-introduced machine 12, the second air-introduced machine 11, the 3rd air-introduced machine 6, storage
Water pot 2, water pump 3 and spray thrower 10.During dehumidifying, the solution pump 9 by the dehumidification solution pump 9 in fluid reservoir 8 into dehumidifier 1,
So that dehumidification solution is back in fluid reservoir 8 after flowing through dehumidifier 1, heater 4, regenerator 5 and cooler 7；Outdoor fresh air one
Aspect is sent into dehumidifier 1 by the second air-introduced machine 11, through the dehumidification solution dehumidifying in dehumidifier 1 and then after temperature adjusting
Use sent to the room；On the other hand it is sent into by the 3rd air-introduced machine 6 in regenerator 5, removes the water steaming from the dehumidification solution after heating
Gas.In the present embodiment, dehumidification system is respectively completed the process of air dewetting and solution regeneration using dehumidifier 1 and regenerator 5,
The two processes circulate repeatedly, it is possible to achieve continuous dehumidifying., can be with it should be noted that for the structure design of dehumidification system
With reference to other existing dehumidification systems, as long as its dehumidifier 1 is to make use of membrane contactor.
As shown in Figures 2 and 3, above-mentioned dehumidifier 1 is the membrane contactor for having high mass transfer efficiency, and it includes multigroup runner
Group, every group of each runner group include the air flow channel 13, solution runner 14 and cooling runner 15, air flow channel 13 and solution being parallel to each other
Plate membrane material 16 is separated between runner 14, cooling runner 15 pushes against solution runner 14 and sets the solution runner 14 away from empty
The side of flow channel 13, and cool and be provided with heat-conducting plate 17 between runner 15 and solution runner 14, it is contemplated that dehumidification solution is general
With corrosivity, therefore heat-conducting plate suggestion is made using the Heat Conduction Material of anti-corrosion type, such as heat-conducting plastic, the gold for being coated with anticorrosive coat
Belong to plate etc..When dehumidifier 1 works, in air flow channel 13, dehumidification solution is flowed in solution runner 14 air flow to be dehumidified
In, because the dehumidification solution in solution runner 14 is cooled down through subcooler 7, therefore board-like membrane material 16 is towards solution runner 14
The water vapor pressure of side can be less than water vapor pressure of the membrane material towards the side of air flow channel 13, and membrane material both sides have vapor pressure difference, because
Steam in this air is transferred in dehumidification solution in the presence of the vapor pressure difference, is steamed so as to reduce the water in air
Gas, reach the purpose of dehumidifying.And when vapor is transferred in dehumidification solution, dehumidification solution can be because absorb these vapor
And latent heat is produced, these latent heat can be transferred to through heat-conducting plate 17 in cooling runner 15, taken away by cooling runner 15, so that molten
The temperature of dehumidification solution in liquid stream road 14 is held essentially constant, and avoid dehumidification solution reduces wet-out property because of temperature rise.
So that it is guaranteed that system has good effect on moisture extraction.In the present embodiment, there is tool between heat-conducting plate 17 and board-like membrane material 16 by anti-corrosion
The sealing strip of performance is supported and sealed, so that it is guaranteed that the sealing of solution runner 14.
In order to ensure cooling runner 15 can fast and effectively shift latent heat caused by dehumidification solution, such as Fig. 1 and Fig. 3 institutes
Show, dehumidification system adds the spray equipment being made up of water tank 2, water pump 3 and spray thrower 10, and water pump 3 is by the water in water tank 2
Pumping is flowed into spray thrower 10, dehumidifier 1 is arrived by the spray of spray thrower 10, so as in the runner of the cooling runner 15 of dehumidifier 1
Wall forms falling liquid film 18, will be absorbed vapor by dehumidification solution by falling liquid film 18 and is generated and communicated to the latent heat on heat-conducting plate and takes away,
So as to reach the purpose for avoiding dehumidification solution from producing temperature rise.Further, in order to strengthen the cooling-down effect of cooling runner 15, dehumidify
System is additionally provided with the first air-introduced machine 12, and the first air-introduced machine 12 is from outdoor air inducing, so as to produce cooling gas in the runner 15 that cools
Stream 19, further strengthen the heat exchange to cool in runner 15 by cooling air-flow 19, as shown in figure 3, the cooling air-flow 19
Flow direction is opposite with the flow direction of falling liquid film 18.Certainly, if heat is smaller caused by dehumidification solution in system, then from reduction system energy
Consumption is angularly set out, and can also be not provided with the first air-introduced machine 12, and cooling runner 15 relies solely on falling liquid film 18 that spray formed to enter
Heat caused by row transfer dehumidification solution.Even, cool runner 15 can be in addition to by the way of being referred to except the present embodiment other
Heat exchange means shift the heat on heat-conducting plate 17, as long as effectively heat caused by dehumidification solution can be shifted in time
Walk.
In the present embodiment, regenerator 5 using the usually used heat insulation-type of prior art membrane contactor, with dehumidifying
Unlike the membrane contactor that device 1 uses, regenerator 5 does not possess cooling runner 15.
Embodiment 2
The two of the embodiment of the efficient dehumidification system of the invention, the main technical schemes of the present embodiment and implementation
Example 1 is identical, in the present embodiment unaccounted feature, using the explanation in embodiment 1, is no longer repeated herein.Such as Fig. 4 institutes
Show, the present embodiment and the difference of embodiment 1 are, the section of distributing fin 20 is provided with each runner of its dehumidifier 1
For triangle.Certainly, according to being actually needed, the section of distributing fin 20 can also be the other shapes structure such as rectangle, sinusoidal pattern.
Finally it should be noted that above example is only illustrating the technical scheme of the invention, rather than to this hair
It is bright create protection domain limitation, although being explained with reference to preferred embodiment to the invention, this area it is general
It is logical it will be appreciated by the skilled person that can be modified to the technical scheme of the invention or equivalent substitution, without departing from this
The spirit and scope of innovation and creation technical scheme.
Claims (7)
1. the membrane contactor of high mass transfer efficiency, including solution runner and air flow channel, between the solution runner and air flow channel
Be provided with only has the membrane material of permeability to specific mass transfer, and system mass transfer is less than film in the vapour pressure of membrane material towards solution flow passage side
Vapour pressure of the material towards air flow channel side, it is characterised in that：Also include the cooling runner to be cooled to solution runner, it is described
Cooling runner is separated with the solution runner by heat-conducting plate；
The cooling falling liquid film of the inwall of runner formed with the flowing formed by cooling fluid；
Flowing has cooling air-flow in the cooling runner；
The flow direction of falling liquid film is opposite with the flow direction for the air-flow that cools in the cooling runner.
2. the membrane contactor of high mass transfer efficiency as claimed in claim 1, it is characterised in that：The cooling runner is arranged at described
Side of the solution runner away from air flow channel.
3. the membrane contactor of high mass transfer efficiency as claimed in claim 1, it is characterised in that：The solution runner, air flow channel
And/or distributing fin is provided with cooling runner, the distributing fin includes rectangle, triangle or sinusoidal pattern fin.
4. efficient dehumidification system, including treat the dehumidifier that dehumidified air is dehumidified, it is characterised in that the dehumidifier is
The membrane contactor of high mass transfer efficiency described in claims 1 to 3 any one, air to be dehumidified flow through the air of the dehumidifier
Runner, dehumidification solution flow through the solution runner.
5. efficient dehumidification system as claimed in claim 4, it is characterised in that：Also include heater, regenerator and cooler,
Dehumidification solution in the solution runner of first membrane contactor returns to dehumidifier after flowing through heater, regenerator and cooler successively
In solution runner.
6. efficient dehumidification system as claimed in claim 5, it is characterised in that：Also include being arranged at the spray above dehumidifier
Device, the spray equipment sprays towards the dehumidifier so that the cooling runner inner wall of the dehumidifier forms the drop of flowing
Film.
7. the efficient dehumidification system described in claim 5, it is characterised in that：The regenerator is heat insulation-type membrane contactor.
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| CN201510547268.1A CN105080346B (en) | 2015-08-31 | 2015-08-31 | The membrane contactor of high mass transfer efficiency and efficient dehumidification system |
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| CN201510547268.1A CN105080346B (en) | 2015-08-31 | 2015-08-31 | The membrane contactor of high mass transfer efficiency and efficient dehumidification system |
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| CN106377979A (en) * | 2016-09-08 | 2017-02-08 | 东莞理工学院 | Inside cooling film dehumidifier and air dehumidification purification device using same |
| CN107606718A (en) * | 2017-08-03 | 2018-01-19 | 东莞理工学院 | Membrane type liquid dehumidifying cooling ceiling and its air adjustment exchange system |
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| US8769971B2 (en) * | 2008-01-25 | 2014-07-08 | Alliance For Sustainable Energy, Llc | Indirect evaporative cooler using membrane-contained, liquid desiccant for dehumidification |
| CN201811367U (en) * | 2010-09-21 | 2011-04-27 | 华南理工大学 | Heat pump-driven membrane-type liquid dehumidification and energy storage device |
| CN205308152U (en) * | 2015-08-31 | 2016-06-15 | 东莞理工学院 | Membrane contactor and high -efficient dehumidification system of high mass transfer efficiency |
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