CN208049716U - A kind of multiple-effect distillation device and system - Google Patents
A kind of multiple-effect distillation device and system Download PDFInfo
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- CN208049716U CN208049716U CN201820315610.4U CN201820315610U CN208049716U CN 208049716 U CN208049716 U CN 208049716U CN 201820315610 U CN201820315610 U CN 201820315610U CN 208049716 U CN208049716 U CN 208049716U
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Abstract
The utility model provides a kind of multiple-effect distillation device, system and method, is related to membrane distillation separation technology field.The utility model includes multiple-effect membrane distillation unit and compressor, and multiple-effect membrane distillation unit includes several concatenated membrane components；Each membrane component is both provided with steam heat exchanger, and the steam that previous membrane component generates is condensed by steam heat exchanger, and the heat of transformation is used to heat the feed liquid of the latter membrane component；Also, indirect steam is compressed using vapour compression machine, the steam for heating supercharging is made to be used further to heat feeding liquid.Utilize the utility model multiple-effect distillation device, the heat that the steam phase transforming that previous effect membrane distillation generates generates can be as the heat source of latter effect membrane distillation, simultaneously the indirect steam that end effect membrane distillation generates recycle after heating supercharging using vapour compression machine, heat is set to make full use of, the input for reducing external heat source, efficiently solves the technical problem that existing film distillation technology heat source utilization rate is low, operating cost is high.
Description
Technical field
The utility model is related to membrane distillation separation technology fields, more particularly, to a kind of multiple-effect distillation device and system.
Background technology
Membrane distillation (MD) is the membrane separating process that membrane technology is combined with distillation process, the technology using hydrophobic membrane pore membrane as
Vapour-liquid separating medium, in film both sides under the action of steam pressure difference, volatile component penetrates hydrophobic microporous in vapour form in feed liquid
Film, to realize the purpose of separation.Compared with other commonly use separation process, membrane distillation has separative efficiency height, operating condition temperature
And between film and material liquid interaction and film mechanical property requirements it is not high the advantages that.
Traditional film distillation technology needs to heat pending stoste using a large amount of low-quality heat source, thus required
Thermal energy consumption is larger.During membrane distillation, the heat of transformation of water vapour is about 2600kJ/kg, is much larger than the specific heat 4kJ/kg of water, therefore
In conventional film distillation process, the steam that membrane distillation is condensed using a large amount of cooling water is needed, and the phase transformation of water vapour condensation
Hot then cooled water is directly taken away, and the loss of heat is caused.In view of the foregoing, membrane distillation is typically considered a kind of heat consumption
Higher technology, thus the popularization and application of the technology are limited to a certain extent.
At present membrane distillation process is carried out by finding cheap low-quality heat source mostly in engineering, but this side
Formula is not suitable for heat source area in short supply；Also have and recycle the waste heat during membrane distillation by way of increasing heat exchanger, it is this
Although method can reduce heat loss to a certain extent, system installation is complicated, and equipment investment is costly.
Based on the above reason, searches out suitable mode and recycle heat loss during membrane distillation, improve heat utilization efficiency, it will
There is very big real value to the popularization and application of membrane distillation.
Utility model content
The purpose of this utility model is to provide a kind of multiple-effect distillation device and systems, to solve to exist in the prior art
Membrane distillation heat source utilization efficiency it is low, the technical problem that thermal loss is big and membrane distillation equipment operating cost is high.This practicality is new
(device structure is simple, volume for many technique effects that optimal technical scheme in many technical solutions that type provides can be generated
It is small, at low cost etc.) elaboration as detailed below.
To achieve the above object, the utility model provides following technical scheme：A kind of multiple-effect distillation device, including extremely
A few multiple-effect membrane distillation unit, the multiple-effect membrane distillation unit includes several concatenated membrane components；The membrane distillation
Component is provided with steam heat exchanger, steam membrane component described in the latter that the previous membrane component generates
Condensation phase transformation occurs at steam heat exchanger, heat at least part that phase transformation generates is as membrane component described in the latter
Heat source；Vapour compression machine is connect with the last one described membrane component of the multiple-effect membrane distillation unit, last for compressing
The steam that one membrane component generates；The vapour compression machine output end connects the first of the multiple-effect membrane distillation unit
A membrane component, compressed steam occur to condense phase at the steam heat exchanger of first membrane component
Become, the heat source as first membrane component.
Preferably, the steam heat exchanger is set as condensation foil.
The utility model also provides a kind of membrane distillation system, including material liquid tank, heating device, dehvery pump, distillation device,
For being heated to feed liquid, the material liquid tank is connect with the dehvery pump by pipeline the heating device；The membrane distillation
Device is set as above-mentioned multiple-effect distillation device, and the dehvery pump is connected with the multiple-effect distillation device feed inlet by pipeline
It connects.
Preferably, the production mouth of a river is additionally provided on the multiple-effect distillation device, for the production water in collection membrane distillation process；
Heat exchanger is set on the pipeline between the material liquid tank and the feed inlet, and the production mouth of a river is connect with heat exchanger, makes the production
Water carries out heat exchange with the feed liquid.
Preferably, it is additionally provided with degassing tank, is set between the material liquid tank and the feed inlet, after removing heating
Feed liquid in on-condensible gas.
Preferably, it is additionally provided with vacuum pump, is connected to the heating device, for keeping system operating air pressure big less than extraneous
Air pressure.
The membrane distillation process of multiple-effect distillation device, system and method progress provided by the utility model, previous effect film
The heat that the steam that distillation generates is generated through phase transformation can be as the heat source of latter effect membrane distillation, while using vapour compression machine pair
The indirect steam that end effect membrane distillation generates recycled after heating supercharging, so that heat is made full use of, can greatly reduce heat waste
It loses, improves the heat utilization efficiency during membrane distillation, reduce the input of external heat source.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other drawings may also be obtained based on these drawings.
Fig. 1 be the utility model is related to multiple-effect distillation device structural schematic diagram；
Fig. 2 is the membrane distillation device structure schematic diagram of the utility model.
1 in figure, multiple-effect membrane distillation unit；2, vapour compression machine；3, degassing tank；4, vacuum pump；5, feed pump；6, heating dress
It sets；7, water pump is produced；8, water pot is produced；9, heat exchanger；10, concentrated water pumps；11, membrane module purge tank；12, membrane component；13, it condenses
Chamber；14, foil is condensed；16, material liquid tank.
Specific implementation mode
It, below will be to the technology of the utility model to keep the purpose of this utility model, technical solution and advantage clearer
Scheme is described in detail.Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not before making creative work
Obtained all other embodiment is put, the range that the utility model is protected is belonged to.
Attached drawing 1 is a kind of structural schematic diagram of multiple-effect distillation device 1.Attached drawing 1 is that the multiple-effect film of the utility model steams
The schematic illustration of distillation unit structure does not represent the real structure of the present apparatus.
The multiple-effect distillation device of the utility model includes at least one multiple-effect membrane distillation unit 1, single multiple-effect membrane distillation
Unit 1 includes multiple concatenated membrane components 12, is connected in series between each membrane component 12, feed liquid is by pipeline to go here and there
The mode of connection sequentially enters first membrane component, second membrane component ... to the last one membrane component, phase
Ying Di, feed liquid carry out the first effect membrane distillation, the second effect membrane distillation ... to end effect membrane distillation successively in membrane component.
Membrane component 12 is provided with steam heat exchanger, and the steam for being generated to previous membrane component carries out cold
It is solidifying, pure water is generated, while condensing phase transformation and generating the heat of transformation, for being heated to feed liquid in the membrane component 12 of the latter, as
The heat source of latter effect membrane distillation process, to recycle the heat loss in previous effect membrane distillation.Above structure can steam previous effect film
The steam heat for evaporating generation is recycled, and is heated to rear stage membrane component, portion is recycled heat in the device, greatly
External heat source input is reduced, energy expenditure is saved；Meanwhile one vapour compression machine of connection is set in 1 end of multiple-effect membrane distillation unit
2,2 output end of the vapour compression machine connects 1 feeding liquid end of multiple-effect membrane distillation unit, makes the steaming exported through the vapour compression machine
Vapour carries out heat exchange with feeding liquid.The vapour pressure for being generated end effect membrane distillation in multiple-effect membrane distillation unit 1 using vapour compression machine 2
Contracting, improves its heat enthalpy value, returns again to heat source of 1 front end of multiple-effect membrane distillation unit as the first effect membrane distillation, enters for heating
The feed liquid of multiple-effect membrane distillation unit 1, makes membrane distillation process persistently carry out.
The utility model, which is used, to be recycled the heat of transformation in multiple-effect distillation device and utilizes vapour compression machine by multiple-effect film
The water vapour that distillation unit 1 generates is compressed, and then makes vapor (steam) temperature, pressure rise, and heat content increases, then returns it into multiple-effect
1 front end of membrane distillation unit makes heat greatly recycle as the heat source of feeding liquid, can be gradually decreased in distillation process or even
Stop new heat source input, the dependence to external heat source can be greatly reduced, the use of external low-quality heat source is reduced, overcome certain
A little area heat sources problem in short supply.
The steam heat exchanger of the utility model could be provided as condensation foil 14, and 14 heat exchange efficiency of condensation foil is high, small,
Occupied space is few, and the volume of distillation device can be made to greatly reduce, and has saved investment and the operating cost of system.
Specific to structure, multiple-effect membrane distillation unit 1 can be provided with feed inlet, discharge port, the feed inlet and first
Membrane component is connected, and the discharge port is connected with the last one membrane component；Above-mentioned membrane component structure is identical, all wraps
Feed liquid passage, diaphragm and condensation foil 14 are included, condensation foil 14 is set to the front end of each membrane component, is steamed with previous effect film
The steam evaporated is in direct contact；Condense foil 14 close to place membrane component feed liquid passage, so as to the latter membrane component
Middle feed liquid effectively heats；The condensation chamber 13 of sealing is set between two adjacent membrane components.Institute in multiple-effect membrane distillation unit 1
Some membrane components 12 are arranged in parallel along steam flow direction, and steam flow direction is preferably made to hang down with 14 surface of condensation foil
Directly；Using the device, feed liquid is after first membrane component enters, successively by multiple membrane distillation groups of parallel series winding setting
Part, until the last one membrane component flows out, by multistage membrane distillation；And the steam generated from previous membrane component,
Condensation phase transformation occurs on 14 surface of condensation foil, the heat of transformation of generation is recycled by the latter membrane component, and the heat recovery
Process carries out successively, and latter effect membrane distillation recycles the thermal loss of previous effect membrane distillation, and heat is recycled, saved repeatedly
External heat inputs, and condensation process is not necessarily to condensed water, saves condensation water resource.
The setting indirect steam of multiple-effect membrane distillation unit 1 exports, and is connect by pipeline with compressor 2, and compressor 2 is for pressing
Contracting indirect steam.It is set to the indirect steam that the membrane component of 1 least significant end of multiple-effect membrane distillation unit generates, it will using compressor
Indirect steam compresses, and makes its increasing temperature and pressure, exports to the membrane component of the front end of multiple-effect membrane distillation unit 1, as first
Imitate the heat source of membrane distillation.Under the action of compressor, the phase transformation heat recycle process in multiple-effect membrane distillation unit 1 can recycle and
It is lasting to carry out, the input of external heat source can be reduced in the process.
As an alternative embodiment, vacuum pump 4 can be connect outside multiple-effect membrane distillation unit 1, vacuum pump 4 is utilized
The 1 inner space air pressure of multiple-effect membrane distillation unit is reduced, such as is reduced to 0.05MPa, can be made in multiple-effect membrane distillation unit 1
Feed liquid boiling point reduces, and can generate higher membrane distillation efficiency at a lower temperature, is further reduced heat input.
The utility model also provides a kind of membrane distillation system, as shown in Fig. 2, whole system includes：Material liquid tank 16, for depositing
Store up raw material to be distilled；The feed pump 5 being connect with material liquid tank 16 is filled for pumping out the feed liquid in material liquid tank 16 to next processing
It sets；Heating device 6 is connect with feed pump 5, and the raw material pumped out from feed pump 5 enters heating device 6 and heated, to reach film
The temperature of distillation needs；Degassing tank 3 is connect with heating device 6, to remove the on-condensible gas after heating in raw material；Multiple-effect film
Distilling apparatus, the wherein feed inlet of multiple-effect membrane distillation unit 1 are connected with degassing tank 3, and the raw material after degasification passes through multiple-effect film
The multi-effect distilling of distillation unit 1, is discharged by discharge port, at the same steam undergone phase transition on condensation foil 14 surface generation liquid it is pure
Water is discharged through water outlet.Concentrated water pump 10, connect with discharge port, for the feed liquid discharge after distilling.
Feed liquid is delivered in heating device 6 by the membrane distillation system of the utility model by feed pump 5 to be heated to generating just
Beginning steam, via be transported to after 3 degasification of degassing tank in multiple-effect membrane distillation unit 1 occur membrane distillation process；In multiple-effect membrane distillation
In device 1, membrane distillation process occurs in first membrane component for feed liquid, and the steam of generation is before second membrane component
Condensation foil 14 on condense, the heat of transformation carries out heat exchange, raising via the feed liquid in condensation foil 14 and second membrane component
The heat loss in membrane distillation is imitated in the temperature of feed liquid, recycling first.Membrane distillation process in second membrane component with first
Film unit is identical, and thus carries out step by step.
Also, the last one membrane component generate steam via vapour compression machine 2 heat supercharging after it is again defeated
It is sent to first membrane component of multiple-effect membrane distillation unit 1, the heat source as the first effect membrane distillation process feed liquid.
Also, during membrane distillation, the use of heating device 6 can be gradually reduced, while utilizing quilt in vapour compression machine 2
Heat heating source of the indirect steam of supercharging as 1 feeding liquid of multiple-effect distillation device.
The concentrated water that feed liquid generates after finally being concentrated is discharged after pumping 10 via concentrated water.
To further increase the hot service efficiency of system, it is additionally provided with the production mouth of a river on the multiple-effect membrane distillation unit 1, is used for
The liquid pure water that condensation is formed is collected, and production water pump 7 is set, production water pot 8 is connected to and is used for pure water pump to heat exchanger.Its
Middle heat exchanger is set on the pipeline between heating device 6 and degassing tank 3, and the production water that membrane distillation process generates is collected into production
In water pot 8, after 3 degasification of degassing tank, the production water with residual temperature by produce water pump 7 be transported in heat exchanger 9, with feed liquid into
Row heat exchange, heat are secondary use, it is possible to reduce the heat of heating device 6 inputs, and further saves the energy.
Heat exchanger 9 is set on the pipeline between the material liquid tank 16 and the feed inlet, and the production mouth of a river connects with heat exchanger 9
It connects, the production water is made to carry out heat exchange with the feed liquid.
This system can also be additionally provided with vacuum pump 4, and the vacuum of whole system is evacuated to 0.05MPa by vacuum pump 4, drop
Low feed liquid boiling point reduces feed liquid membrane distillation institute calorific requirement.
It is additionally provided with membrane module purge tank 11,1 equipment of multiple-effect membrane distillation unit setting cleaning interface, membrane module purge tank 11
Connection cleaning interface, injects membrane module by cleaning solution, carries out membrane module cleaning.
The utility model also provides a kind of multiple-effect membrane distillation method, connects to form the steaming of multiple-effect film by multiple membrane components
Distillation unit is completed, and is included the following steps：When material flow is through previous effect membrane component, make in system negative pressure and film both sides temperature difference
It is distilled with filming is issued；Make the steam generation phase transformation that previous effect membrane distillation generates using condensation foil 14, generates liquid water；Using upper
State heat source of the heat of phase transformation generation as latter effect membrane distillation process；And make the steam that end effect membrane distillation generates via pipeline
It is transported in vapour compression machine, the charging for being transmitted back to multiple-effect distillation device after being pressurized again is heated by vapour compression machine
Liquid side, the source as feeding liquid heat.The heat of transformation that above procedure cycle carries out each effect membrane distillation process can be efficient
The transmission of rate is supplied for next effect membrane distillation process heat；By above method, entire membrane distillation process is defeated to external heat source
Enter to reduce, improve the heat utilization efficiency during membrane distillation, reduce heat loss, while eliminating the use of condensed water, saves
The investment of system and operating cost, bring huge economic value.
So cycle, can be greatly reduced the use of external heat source.
This method can also carry out heat exchange including the use of the production water and the feed liquid for entering first membrane component.Film
What distillation process obtained produces water with residual temperature, then carries out heat exchange via production water/charging liquid heat exchanger and feeding liquid, improve into
Feed temperature.
The utility model above method can realize that feed liquid is delivered to heating by feed pump 5 by the membrane distillation system of Fig. 2
It is heated to generating primary steam in device 6, film steaming occurs via being transported to after 3 degasification of degassing tank in multiple-effect distillation device 1
Evaporate process；The production water that membrane distillation process generates is collected into production water pot 8, after 3 degasification of degassing tank, carries the production water of residual temperature
It is transported in heat exchanger 9 by producing water pump 7, heat exchange is carried out with feed liquid, the production water recycling being thoroughly cooled uses；Multiple-effect
The steam that end effect membrane distillation generates in distillation device is transported to vapour compression machine 2, and supercharging is heated via vapour compression machine 2
It is transported to 1 feeding liquid side of multiple-effect distillation device, one of the heat source as feed liquid again afterwards.First effect membrane distillation process occurs
Afterwards, the use that heating device 6 can be gradually reduced, using being heated the indirect steam of supercharging in vapour compression machine 2 as feed liquid
Heating source.
Above description is only a specific implementation of the present invention, but the scope of protection of the utility model is not limited to
In this, any one skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation
Or replace, it should be covered within the scope of the utility model.Therefore, the scope of protection of the utility model should be with the power
Subject to the protection domain that profit requires.
Claims (6)
1. a kind of multiple-effect distillation device, which is characterized in that including
At least one multiple-effect membrane distillation unit, the multiple-effect membrane distillation unit include several concatenated membrane components；
The membrane component is provided with steam heat exchanger, and the steam that the previous membrane component generates is in the latter institute
It states and condensation phase transformation occurs at the steam heat exchanger of membrane component, heat at least part that phase transformation generates is used as the latter institute
State the heat source of membrane component；
Vapour compression machine is connect with the last one described membrane component of the multiple-effect membrane distillation unit, last for compressing
The steam that one membrane component generates；The vapour compression machine output end connects the first of the multiple-effect membrane distillation unit
A membrane component, compressed steam occur to condense phase at the steam heat exchanger of first membrane component
Become, the heat source as first membrane component.
2. multiple-effect distillation device according to claim 1, which is characterized in that the steam heat exchanger is set as condensing
Foil.
3. a kind of membrane distillation system, including material liquid tank, heating device, dehvery pump, distillation device, the heating device for pair
Feed liquid is heated, and the material liquid tank is connect with the dehvery pump by pipeline；It is characterized in that, the distillation device setting
For multiple-effect distillation device as claimed in claim 1 or 2, the dehvery pump passes through pipe with the multiple-effect distillation device feed inlet
Road connects.
4. membrane distillation system according to claim 3, which is characterized in that be additionally provided with production on the multiple-effect distillation device
The mouth of a river, for the production water in collection membrane distillation process；Heat exchanger is set on pipeline between the material liquid tank and the feed inlet,
The production mouth of a river is connect with heat exchanger, and the production water is made to carry out heat exchange with the feed liquid.
5. membrane distillation system according to claim 4, which is characterized in that be additionally provided with degassing tank, be set to the feed liquid
Between tank and the feed inlet, for removing the on-condensible gas in the feed liquid after heating.
6. membrane distillation system according to claim 5, which is characterized in that be additionally provided with vacuum pump, be connected to the heating
Device, for making system operating air pressure be less than external atmosphere pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820315610.4U CN208049716U (en) | 2018-03-07 | 2018-03-07 | A kind of multiple-effect distillation device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820315610.4U CN208049716U (en) | 2018-03-07 | 2018-03-07 | A kind of multiple-effect distillation device and system |
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| Publication Number | Publication Date |
|---|---|
| CN208049716U true CN208049716U (en) | 2018-11-06 |
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| CN201820315610.4U Active CN208049716U (en) | 2018-03-07 | 2018-03-07 | A kind of multiple-effect distillation device and system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108211801A (en) * | 2018-03-07 | 2018-06-29 | 北京天地人环保科技有限公司 | A kind of multiple-effect distillation device, system and method |
| CN111644066A (en) * | 2020-06-17 | 2020-09-11 | 东北电力大学 | Vacuum-aeration type membrane distillation device and using method thereof |
-
2018
- 2018-03-07 CN CN201820315610.4U patent/CN208049716U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108211801A (en) * | 2018-03-07 | 2018-06-29 | 北京天地人环保科技有限公司 | A kind of multiple-effect distillation device, system and method |
| CN111644066A (en) * | 2020-06-17 | 2020-09-11 | 东北电力大学 | Vacuum-aeration type membrane distillation device and using method thereof |
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Effective date of registration: 20190813 Address after: 100176 No. 2 Building, Ronghua South Road, Beijing Daxing District, Beijing Economic and Technological Development Zone, 502 Patentee after: Beijing Yunchuang Tiandi Environmental Protection Technology Service Co., Ltd. Address before: Room 1106, 11th floor, 2nd building, No. 1 Courtyard, Shangdi Tenth Street, Haidian District, Beijing, 100089 Patentee before: Beijing TDR Environ-Tech Co., Ltd. |
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