CN104289108B - A kind of high-frequency impulse is for vacuum membrane distillation renovation process - Google Patents
A kind of high-frequency impulse is for vacuum membrane distillation renovation process Download PDFInfo
- Publication number
- CN104289108B CN104289108B CN201310304064.6A CN201310304064A CN104289108B CN 104289108 B CN104289108 B CN 104289108B CN 201310304064 A CN201310304064 A CN 201310304064A CN 104289108 B CN104289108 B CN 104289108B
- Authority
- CN
- China
- Prior art keywords
- solution
- membrane
- film
- frequency
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
A kind of high-frequency impulse, for vacuum membrane distillation renovation process, belongs to vacuum membrane distillation technical field.nullAfter plant-grid connection frequency is the 220V alternating current of 50Hz，Output voltage 1KV～10KV after being changed by booster transformer，Frequency is the high-frequency pulse signal of 1.31KHz～8KHz，High-frequency pulse signal is inserted membrane module solution inlet，Outlet at the solution of membrane module is connected with the high-frequency impulse electrode of porch by wire，High-frequency impulse makes the pressure in device solution occur drastically to change，Gas in solution and a large amount of bubbles himself produced due to pressure change，Occur to break out frequently and collapse in very short time，Break out and the collapse of bubble can produce strong shock wave，The temperature and pressure of local in solution is made drastically to raise，The change of local temperature and pressure causes solution vibration aggravation，By controlling pulse frequency and the dutycycle ratio of pulse period (the pulse output time with)，Form high-frequency impulse for Membrane Materials desulfurization.
Description
Technical field
The present invention relates to a kind of high-frequency impulse for vacuum membrane distillation renovation process, belong to vacuum diaphragm and steam
Evaporate technical field.
Background technology
Spiral wound membrane module is applied to vacuum membrane distillation by the one of application number 201010034385.5
Method, by thin flat membrane and some auxiliary materials, by steam flow direction, with coarse net, diaphragm and
The three-decker form arrangement of fine-structure mesh, is wound on together on the central canal being with holes and makes spiral film
Assembly, the region that wherein fine-structure mesh directly contacts with diaphragm have employed regularly arranged strip pore structure；
While rolling, each several part is sealing adhesive by the requirement of vacuumizing process；And according to the knot of assembly
Structure feature produces putamina, assembly is inserted putamina and is packaged obtaining being efficiently applied to vacuum diaphragm
The device of distillation, so that dredging flat membrane can be applied to vacuum membrane distillation in more reasonably mode.
The one of application number 201010113543.6 utilizes live (open) steam compressing hot pump to carry out vacuum diaphragm
The method and device of distillation.By using a vapour compression machine that membrane module directly passes through the steam of side
It is compressed, the high temperature and high pressure steam after compression is passed sequentially through a heater and a preheater,
Simultaneously by raw material also by heater and preheater.In this process, utilize the temperature of this steam with
Raw material carries out heat exchange, i.e. realizes the condensation of steam, cooling release heat, from without extra
Refrigeration working medium and vaporizer thereof and condenser, and utilize vapour compression machine to be formed when sucking steam
Negative pressure is as vacuum source, thus saves vacuum pump；Meanwhile, will pass through from membrane module concentrate out
One preheater carries out heat exchange with raw material.
High-frequency impulse is not used for the technical scheme of vacuum membrane distillation regeneration by prior art.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of high-frequency impulse for vacuum diaphragm
Distillation renovation process, the method, on the premise of not affecting routine operation, reduces film surface and forms attachment
Layer or concentration, thermograde are poor, maintain the membrane flux in sweetening process, the service life of increase film,
Improve the separation efficiency of selexol process, reduce production cost, increase economic efficiency.
For achieving the above object, use technical scheme as follows: a kind of high-frequency impulse steams for vacuum diaphragm
Evaporate renovation process, containing following steps；
After plant-grid connection frequency is the 220V alternating current of 50Hz, defeated after being changed by booster transformer
Going out voltage 1KV～10KV, frequency is the high-frequency pulse signal of 1.31KHz～8KHz, by high frequency
Pulse signal inserts membrane module solution inlet, in the outlet of solution of membrane module by wire and porch
High-frequency impulse electrode be connected, high-frequency impulse makes pressure in device solution occur drastically to change, solution
In gas and a large amount of bubbles of himself producing due to pressure change, occur frequently in very short time
Break out and collapse, break out and the collapse of bubble can produce strong shock wave, make in solution local
Temperature and pressure drastically raises, and the change of local temperature and pressure causes solution vibration aggravation, by control
Pulse frequency processed and the dutycycle ratio of pulse period (the pulse output time with), form high-frequency impulse and use
In Membrane Materials desulfurization；
High-frequency impulse produces magnetic field, impulse electric field and pulsed magnetic field alternating action, and solution is by bigger
Oscillating force, solution acutely vibrates in membrane module, and membrane permeability increases, and solution is abundant with membrane boundary region
Contact, alleviates concentration polarization and the phenomenon of temperature difference polarization that Membrane Materials process produces, increases sweetening process
In membrane flux, increase mass transfer motive force, it is to avoid fouling membrane；Reduce solution and film critical region
Concentraton gradient difference and thermograde are poor, maintain higher membrane flux；
In the junction of solution inlet electrode Yu taphole electrode, insulating barrier is set；
Basic solvent MDEA and H2S occurs chemical reaction to generate the complexation being dissolved in water of a kind of instability
Thing, its reaction equation is as follows:
Above-mentioned reaction is reversible reaction, works as H2When S partial component pressure is high and temperature is low, reaction is entered to the right
OK, lean MDEA solution absorbs acidic components, and heat release from unstripped gas；And at H2S component is divided
When forcing down with temperature height, reaction is carried out to the left, is discharged by acidic components from rich MDEA solution
Come, make solution be regenerated, and absorb heat；
Membrane Materials is the membrane separating process that membrane technology combines with evaporation process, its film used be not by
The dewatering microporous film of pending solution-wet；Membrane Materials basic process be film side with heat wait locate
Reason solution directly contacts, and opposite side directly or indirectly contacts with cold liquid, due to the hydrophobic microporous of film
Property, aqueous solution and macromolecular substances can not pass through membranous wall, and other volatile material then steam in film both sides
Entered into the opposite side of film under the promotion of steam pressure difference by fenestra, it is achieved thereby that the separation of mixture or
Purify；
In separation process, due to the selective penetrated property of film, the solvent in feed liquid is saturating under pressure-driven
Crossing film, solute major part is rejected by, at film and bulk solution interface or close on the dense of membrane interface region
Spend more and more higher, cause film critical surface region to the Concentraton gradient between bulk solution, make at Concentraton gradient
Under with, solute can be spread to bulk solution by face again, forms boundary region, makes fluid resistance and local
Osmotic pressure increases, and causes solvent permeation flux to decline, fouling membrane even occurs, cause membrane separating property
Change；
The process simultaneously transmitted due to heat, quality during Membrane Materials, cross-film temperature difference not only produces heat
Transmission, simultaneously can also cause quality to transmit, under the effect of pressure differential, film from temperature high side to temperature
Downside transmits, and produces thermograde at solution with film critical region so that the cross-film temperature difference in transmittance process
Less than the main body temperature difference of solvent Yu film, reduce the motive force of mass transfer.
High-frequency impulse is used for the vacuum membrane distillation of natural gas desulfurizing agent methyl diethanolamine by the present invention, makes
Solution vibrates, and alleviates concentration polarization and the phenomenon of temperature difference polarization that Membrane Materials process produces, increases
Membrane flux in sweetening process, increases the motive force of mass transfer, it is to avoid fouling membrane.
The present invention on the premise of not affecting routine operation, reduce film surface formed adhesive layer or concentration,
Thermograde is poor, maintains the membrane flux in sweetening process, increases the service life of film, improves natural
The separation efficiency of desulfurization, reduces production cost, increases economic efficiency.
Accompanying drawing explanation
When considered in conjunction with the accompanying drawings, by referring to detailed description below, it is possible to more completely preferably
Understand the present invention and easily learn the advantage that many of which is adjoint, but accompanying drawing described herein is used for
A further understanding of the present invention is provided, constitutes the part of the present invention, the schematic enforcement of the present invention
Example and explanation thereof are used for explaining the present invention, are not intended that inappropriate limitation of the present invention, such as figure wherein:
Fig. 1 is the membrane module structure schematic diagram of the present invention.
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Detailed description of the invention
Obviously, the many modifications and variations that those skilled in the art are done based on spirit of the invention belong to
Protection scope of the present invention.
Embodiment 1: as it is shown in figure 1, a kind of high-frequency impulse is for vacuum membrane distillation renovation process,
Containing following steps；
After plant-grid connection frequency is the 220V alternating current of 50Hz, export after being changed by booster transformer
Voltage 1KV～10KV, frequency is the high-frequency pulse signal of 1.31KHz～8KHz, is believed by high-frequency impulse
Number insert membrane module solution inlet, in the outlet of solution of membrane module by the high frequency of wire Yu porch
Pulsed electrode is connected, and high-frequency impulse makes the pressure in device solution occur drastically to change, the gas in solution
Body and a large amount of bubbles himself produced due to pressure change, occur to break out frequently in very short time
And collapse, break out and the collapse of bubble can produce strong shock wave, make local in solution temperature and
Pressure drastically raises, and the change of local temperature and pressure causes solution vibration aggravation, by controlling pulse
Frequency and the dutycycle ratio of pulse period (the pulse output time with), form high-frequency impulse and steam for film
Evaporate desulfurization；
Using AC power supply device to be converted to voltage 1KV～10KV by booster transformer, frequency is
The high-frequency pulse signal of 1.31KHz～8KHz, the pressure in device solution is under the effect of impulse electric field
Occurring drastically to change, gas in solution and a large amount of bubbles of himself producing due to pressure change are in pole
In short time, generation breaks out and collapse frequently, and break out and the collapse of bubble can produce strong impact
Ripple, makes the temperature and pressure of local in solution drastically raise, and high-frequency impulse produces magnetic field, impulse electric field
With pulsed magnetic field alternating action, solution is by bigger oscillating force, and solution acutely vibrates in membrane module,
Membrane permeability increases, and solution is fully contacted with membrane boundary region, alleviates the concentration pole that Membrane Materials process produces
Change and the phenomenon of temperature difference polarization, increase the membrane flux in sweetening process, increase the motive force of mass transfer, keep away
Exempt from fouling membrane；Reduce solution poor with the Concentraton gradient of film critical region difference and thermograde, maintain higher
Membrane flux；
In the junction of solution inlet electrode Yu taphole electrode, insulating barrier is set；
Basic solvent MDEA and H2S occurs chemical reaction to generate the complexation being dissolved in water of a kind of instability
Thing, its reaction equation is as follows:
Above-mentioned reaction is reversible reaction, works as H2When S partial component pressure is high and temperature is low, reaction is entered to the right
OK, lean MDEA solution absorbs acidic components, and heat release from unstripped gas；And at H2S component is divided
When forcing down with temperature height, reaction is carried out to the left, is discharged by acidic components from rich MDEA solution
Come, make solution be regenerated, and absorb heat.
Membrane Materials is the membrane separating process that membrane technology combines with evaporation process, its film used be not by
The dewatering microporous film of pending solution-wet；Membrane Materials basic process be film side with heat wait locate
Reason solution directly contacts, and opposite side directly or indirectly contacts with cold liquid, due to the hydrophobic microporous of film
Property, aqueous solution and macromolecular substances can not pass through membranous wall, and other volatile material then steam in film both sides
Entered into the opposite side of film under the promotion of steam pressure difference by fenestra, it is achieved thereby that the separation of mixture or
Purify.
In separation process, due to the selective penetrated property of film, the solvent in feed liquid is saturating under pressure-driven
Crossing film, solute major part is rejected by, at film and bulk solution interface or close on the dense of membrane interface region
Spend more and more higher, cause film critical surface region to the Concentraton gradient between bulk solution, make at Concentraton gradient
Under with, solute can be spread to bulk solution by face again, forms boundary region, makes fluid resistance and local
Osmotic pressure increases, and causes solvent permeation flux to decline, fouling membrane even occurs, cause membrane separating property
Change.
The process simultaneously transmitted due to heat, quality during Membrane Materials, cross-film temperature difference not only produces heat
Transmission, simultaneously can also cause quality to transmit, under the effect of pressure differential, film from temperature high side to temperature
Downside transmits, and produces thermograde at solution with film critical region so that the cross-film temperature difference in transmittance process
Less than the main body temperature difference of solvent Yu film, reduce the motive force of mass transfer.
AC power supply device is converted into high-frequency impulse by booster transformer and adds in membrane module, and device is molten
Pressure in liquid occurs drastically to change under the effect of impulse electric field, gas in solution and himself by
The a large amount of bubbles produced in pressure change occur to break out frequently and collapse in very short time, bubble
Break out and can produce strong shock wave with collapse, make the temperature and pressure of local in solution drastically raise,
The change of local temperature and pressure causes solution vibration aggravation, by controlling pulse frequency and dutycycle
The ratio of pulse period (the pulse output time with), will not occur interelectrode short circuit phenomenon.
Embodiment 2: as it is shown in figure 1, a kind of high-frequency impulse is for vacuum membrane distillation renovation process,
Containing following steps；
The rich MDEA solution needing regeneration is heated to experimental temperature by heating tank, is delivered in membrane module,
AC power supply device exports high-frequency pulse signal after being changed by booster transformer, and pulse signal makes solution
In pressure occur drastically to change, gas in solution and himself due to pressure change produce a large amount of
Bubble occurs to break out frequently and collapse in very short time, and break out and the collapse of bubble can produce strongly
Shock wave, make in solution the temperature and pressure of local drastically raise, local temperature and the change of pressure
Causing solution vibration aggravation, membrane permeability increases, and solution is fully contacted with membrane boundary region, reduces molten
The concentration extreme difference of liquid and membrane boundary and temperature extreme difference, maintain membrane flux higher in experimentation.
A kind of high-frequency impulse for vacuum membrane distillation renovation process, its device include entrance 2, outlet 5,
Membrane module 4, insulating barrier 3 and electrode 1 are after accessing the 220V alternating current power supply that frequency is 50Hz, logical
Crossing output voltage 1KV～10KV after booster transformer conversion, frequency is the high frequency of 1.31KHz～8KHz
Pulse signal, inputs membrane module solution inlet by high-frequency pulse signal by electrode, by membrane module 4
Interior solution is connected with outlet high-frequency impulse electrode.
High-frequency impulse makes pressure in device solution occur drastically to change, gas in solution and himself
The a large amount of bubbles produced due to pressure change occur to break out frequently and collapse in very short time, bubble
Break out and can produce strong shock wave with collapse and make in solution the temperature and pressure of local drastically raise,
The change of local temperature and pressure causes solution vibration aggravation
High-frequency impulse frequency and dutycycle are adjustable, and pulse output time is controlled with the ratio of pulse period.
High-frequency impulse makes solution be subject to bigger oscillating force, and solution acutely vibrates in membrane module, and film is saturating
Property increase, solution and membrane boundary region be fully contacted, alleviate concentration polarization that Membrane Materials process produces with
The phenomenon of temperature difference polarization, increases the membrane flux in sweetening process, increases the motive force of mass transfer, it is to avoid film
Pollute；Reduce solution poor with the Concentraton gradient of film critical region difference and thermograde, maintain higher film
Flux.
Insulating barrier 3 is arranged on the electrode 1 of the entrance 2 of solution and the junction of outlet 5 electrode of solution.
As it has been described above, embodiments of the invention are explained, but as long as substantially do not have
The inventive point and the effect that have the disengaging present invention can have a lot of deformation, and this is to those skilled in the art
For be apparent from；Therefore, such variation is also integrally incorporated in protection scope of the present invention
Within.
Claims (1)
1. high-frequency impulse is used for a vacuum membrane distillation renovation process, and its feature is containing following steps；
After plant-grid connection frequency is the 220V alternating current of 50Hz, defeated after being changed by booster transformer
Going out voltage 1KV～10KV, frequency is the high-frequency pulse signal of 1.31KHz～8KHz, by high frequency
Pulse signal inserts membrane module solution inlet, in the outlet of solution of membrane module by wire and porch
High-frequency impulse electrode be connected, high-frequency impulse makes pressure in device solution occur drastically to change, solution
In gas and a large amount of bubbles of himself producing due to pressure change, occur frequently in very short time
Break out and collapse, break out and the collapse of bubble can produce strong shock wave, make in solution local
Temperature and pressure drastically raises, and the change of local temperature and pressure causes solution vibration aggravation, by control
Pulse frequency processed and dutycycle i.e. pulse output time and the ratio of pulse period, form high-frequency impulse and be used for
Membrane Materials desulfurization；
High-frequency impulse produces magnetic field, impulse electric field and pulsed magnetic field alternating action, and solution is by bigger
Oscillating force, solution acutely vibrates in membrane module, and membrane permeability increases, and solution is abundant with membrane boundary region
Contact, alleviates concentration polarization and the phenomenon of temperature difference polarization that Membrane Materials process produces, increases sweetening process
In membrane flux, increase mass transfer motive force, it is to avoid fouling membrane；Reduce solution and film critical region
Concentraton gradient difference and thermograde are poor, maintain higher membrane flux；
In the junction of solution inlet electrode Yu taphole electrode, insulating barrier is set；
Basic solvent MDEA and H2S occurs chemical reaction to generate the water that is dissolved in of a kind of instability
Complex, its reaction equation is as follows:
Above-mentioned reaction is reversible reaction, works as H2When S partial component pressure is high and temperature is low, reaction is entered to the right
OK, lean MDEA solution absorbs acidic components, and heat release from unstripped gas；And at H2S component
Dividing potential drop is low and during temperature height, reaction is carried out to the left, is released by acidic components from rich MDEA solution
Release, make solution be regenerated, and absorb heat；
Membrane Materials is the membrane separating process that membrane technology combines with evaporation process, its film used be not by
The dewatering microporous film of pending solution-wet；Membrane Materials basic process be film side with heat wait locate
Reason solution directly contacts, and opposite side directly or indirectly contacts with cold liquid, due to the hydrophobic microporous of film
Property, aqueous solution and macromolecular substances can not pass through membranous wall, and other volatile material then steam in film both sides
Entered into the opposite side of film under the promotion of steam pressure difference by fenestra, it is achieved thereby that the separation of mixture or
Purify；
In separation process, due to the selective penetrated property of film, the solvent in feed liquid is saturating under pressure-driven
Crossing film, solute major part is rejected by, at film and bulk solution interface or close on the dense of membrane interface region
Spend more and more higher, cause film critical surface region to the Concentraton gradient between bulk solution, make at Concentraton gradient
Under with, solute can be spread to bulk solution by face again, forms boundary region, makes fluid resistance and local
Osmotic pressure increases, and causes solvent permeation flux to decline, fouling membrane even occurs, cause membrane separating property
Change；
The process simultaneously transmitted due to heat, quality during Membrane Materials, cross-film temperature difference not only produces heat
Transmission, simultaneously can also cause quality to transmit, under the effect of pressure differential, film from temperature high side to temperature
Downside transmits, and produces thermograde at solution with film critical region so that the cross-film temperature difference in transmittance process
Less than the main body temperature difference of solvent Yu film, reduce the motive force of mass transfer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310304064.6A CN104289108B (en) | 2013-07-19 | 2013-07-19 | A kind of high-frequency impulse is for vacuum membrane distillation renovation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310304064.6A CN104289108B (en) | 2013-07-19 | 2013-07-19 | A kind of high-frequency impulse is for vacuum membrane distillation renovation process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104289108A CN104289108A (en) | 2015-01-21 |
| CN104289108B true CN104289108B (en) | 2016-08-10 |
Family
ID=52309195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310304064.6A Active CN104289108B (en) | 2013-07-19 | 2013-07-19 | A kind of high-frequency impulse is for vacuum membrane distillation renovation process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104289108B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108947084A (en) * | 2018-07-09 | 2018-12-07 | 河海大学 | A kind of distillation device slowing down inorganic fouling membrane using impulse electric field |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101417209A (en) * | 2007-10-22 | 2009-04-29 | 天津海之凰科技有限公司 | Energy-saving pressure-reduction distillation device and method |
| CN101632901A (en) * | 2008-07-21 | 2010-01-27 | 天津海之凰科技有限公司 | Heat-recovery vacuum membrane distillation component device and vacuum membrane distillation method |
| CN103007761A (en) * | 2012-12-11 | 2013-04-03 | 常州大学 | Method and device for slowing down concentration polarization of natural gas desulfurizing agent methyl diethanolamine |
| EP2606953A1 (en) * | 2011-12-23 | 2013-06-26 | Aquaver B.V. | Membrane distillation system, method of starting such a system and use thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5025844B2 (en) * | 2000-06-02 | 2012-09-12 | 日産化学工業株式会社 | Membrane permeation control method by microwave |
| CA2351272C (en) * | 2001-06-22 | 2009-09-15 | Petro Sep International Ltd. | Membrane-assisted fluid separation apparatus and method |
-
2013
- 2013-07-19 CN CN201310304064.6A patent/CN104289108B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101417209A (en) * | 2007-10-22 | 2009-04-29 | 天津海之凰科技有限公司 | Energy-saving pressure-reduction distillation device and method |
| CN101632901A (en) * | 2008-07-21 | 2010-01-27 | 天津海之凰科技有限公司 | Heat-recovery vacuum membrane distillation component device and vacuum membrane distillation method |
| EP2606953A1 (en) * | 2011-12-23 | 2013-06-26 | Aquaver B.V. | Membrane distillation system, method of starting such a system and use thereof |
| CN103007761A (en) * | 2012-12-11 | 2013-04-03 | 常州大学 | Method and device for slowing down concentration polarization of natural gas desulfurizing agent methyl diethanolamine |
Non-Patent Citations (1)
| Title |
|---|
| 膜蒸馏技术回收MEDA的实验研究;蔡培等;《天然气化工》;20090404;第34卷(第1期);第25-29页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104289108A (en) | 2015-01-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205435181U (en) | Doublestage vacuum oil filter | |
| CN206199023U (en) | A kind of distillation device of carrying vapour mechanical compress | |
| Wang et al. | Membrane stripping technology for CO2 desorption from CO2-rich absorbents with low energy consumption | |
| CN104289108B (en) | A kind of high-frequency impulse is for vacuum membrane distillation renovation process | |
| CN103362763A (en) | Method for eliminating concentration polarization during osmotic energy power generation | |
| CN202811240U (en) | Autoclave technology salinity difference energy generating set | |
| KR20150038912A (en) | Non-Dischargeable Convergence Seawater Distillation Apparatus Using Non-Used Energy | |
| CN208852709U (en) | Combination drive nanofiltration membrane component | |
| CN211004647U (en) | Stacked capillary force driven water treatment device | |
| CN106753633A (en) | A kind of natual gas dehydrate unit | |
| CN210645787U (en) | Water removal device of oxygen generation system | |
| CN202638284U (en) | Tubular membrane distillator capable of enabling liquid not to contact with membrane | |
| CN202422923U (en) | Restoring device for power transformer oil | |
| KR101421103B1 (en) | Device for water treatment and electricity generation using pressure retarded membrane distillation | |
| CN104415666B (en) | The immersion vacuum membrane distillation method for concentration of ethylene glycol solution | |
| CN212440796U (en) | Methanol separator based on vaporization and permeation | |
| CN204121847U (en) | A kind of aluminium oxide washing separating and filtering device | |
| CN108889129A (en) | Combination drive nanofiltration membrane component and well mine salt salt producing craft | |
| CN104437006A (en) | Membrane absorption device and method for purifying bio-methane | |
| CN104030511A (en) | Solar water making system with self-cleaning filtering function | |
| CN205332624U (en) | Utilize solid to adsorb binary ice preparation facilities of maintaining vacuum | |
| CN204294089U (en) | A kind of double tower dewatering unit of energy automatic pressure regulation balance | |
| CN206435056U (en) | A kind of tubular type air gap membrane distillation component | |
| CN104857856A (en) | Novel efficient membrane distillation method and device | |
| CN102658030A (en) | Liquid and membrane non-contact barrel-shaped membrane distiller |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |