CN108067103A - Doughnut tablet coupled film distillation equipment and use its membrane distillation system - Google Patents
Doughnut tablet coupled film distillation equipment and use its membrane distillation system Download PDFInfo
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- CN108067103A CN108067103A CN201711498616.6A CN201711498616A CN108067103A CN 108067103 A CN108067103 A CN 108067103A CN 201711498616 A CN201711498616 A CN 201711498616A CN 108067103 A CN108067103 A CN 108067103A
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- membrane
- doughnut
- water
- tablet
- hydrophobic membrane
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/36—Pervaporation; Membrane distillation; Liquid permeation
- B01D61/364—Membrane distillation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/36—Pervaporation; Membrane distillation; Liquid permeation
- B01D61/366—Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
- B01D63/026—Wafer type modules or flat-surface type modules
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/08—Thin film evaporation
Abstract
A kind of doughnut tablet coupled film distillation equipment and use its membrane distillation system, hydrophobic hollow fiber membrane by being made the hydrophobic membrane M of curtain type membrane and then being coupled to form CMC structure with tablet condensation film C by the doughnut tablet coupled film distillation equipment, raw water passage is formed wherein between hollow-fibre membrane and condensation film C, the tube side of hollow-fibre membrane forms evaporation channel, and heating passage is formed between CMC structure；Multiple CMC can be superimposed and are separated by with net-like spacer and further connect to be formed hollow tablet coupling single-action or multiple-effect membrane distillation equipment.The present invention can solve the problems, such as that board-like membrane distillation unit volume membrane area is small.
Description
Technical field
The present invention relates to wastewater treatment, feed separation and concentration, technical field of resource recovery, more particularly to a kind of hollow
Fiber tablet couples multiple-effect membrane distillation equipment and uses its membrane distillation system.
Background technology
The membrane distillation low-pressure low-temperature corrosion-resistant plastic evaporation technique emerging as one, due to from waste water Effects of Salinity,
And can be heated using low product heat with waste heat, the features such as salt rejection rate is high, fouling membrane trend is low, be increasingly subject to enterprise with
The concern of scholar.Membrane distillation equipment currently on the market mainly has flat, rolling and the membrane distillation equipment of hollow fiber film type,
Wherein flat membrane distillation is easiest to realize multiple-effect to improve the thermal efficiency, but the membrane area of unit volume is small, causes cost of investment
Height, so as to affect the acceptance of client and extensive use.Although the membrane area of hollow fiber film type membrane distillation unit volume is big,
But thermal losses is big during multiple-effect is realized, operating cost is high.Several solution membrane distillation thermal losses are disclosed in the prior art
High scheme, but in practical application test process, effect embody not yet, therefore still there is an urgent need to one kind can improve list
The hollow fiber film type membrane distillation equipment of film process area, reduction equipment cost and thermal losses in the volume of position.
The content of the invention
In view of this, it is a primary object of the present invention to propose a kind of doughnut tablet coupling multiple-effect membrane distillation equipment,
To solve at least one of above-mentioned technical problem at least partly.
To achieve these goals, as one aspect of the present invention, it is proposed that a kind of doughnut tablet coupled film steams
Evaporate equipment, which is characterized in that the doughnut tablet coupled film distillation equipment presss from both sides a hydrophobic membrane M couplings by two panels condensation film C
It closes, is provided with raw water inlet, concentrated water water outlet, heating feeder connection, condensed water water outlet and evaporation channel and goes out
Mouthful, wherein：
Hydrophobic membrane M is that hollow fiber hydrophobic membrane is encapsulated in the curtain membrane formed in a frame；
Two panels condensation film C is tablet non-porous film, for condensing the heat source in heating passage；The two panels condensation film C
The both sides of the hydrophobic membrane M are fixed on, a CMC structure is formed with the hydrophobic membrane M；
Raw water passage, heating passage and evaporation channel are formed on the CMC structure, wherein：
Raw water passage is formed by the gap between the two panels condensation film C and hydrophobic membrane M, connects raw water inlet
With concentrated water water outlet, raw water is inputted from raw water inlet, the concentrated water after concentrated water water outlet discharge evaporation and concentration；
Passage is heated, positioned at the CMC structure surface, the CMC structure being stacked with another is with net-like spacer is separated by and spells
It closes and is formed, for providing heat source, connection heating feeder connection and condensed water water outlet to the raw water passage, from heating passage
Entrance inputs heat source, and the heat source condensed from the discharge of condensed water water outlet after heat exchange；
Evaporation channel, using the tube side of the hollow fiber hydrophobic membrane in the hydrophobic membrane M as evaporation channel, for by original
The steam that water generates under heat source heating is exported from evaporation channel to be exported.
As another aspect of the present invention, it is also proposed that a kind of membrane distillation system, which is characterized in that including：
Doughnut tablet coupled film distillation equipment as described above；
Condensation water collection tank, the condensation water collection tank are installed on outside the doughnut tablet coupling membrane component,
Passage is heated in the membrane component and afterbody evaporation channel is connected, and is connected with vacuum system；
Vacuum system, for reducing the pressure of the evaporation channel in the doughnut tablet coupled film distillation equipment to increase
Add the pressure difference of hollow fiber hydrophobic membrane both sides, be also used for guiding the trend of evaporated vapor and condensed water is extracted into condensation water collection
Tank, the evaporated vapor generated so as to each effect doughnut tablet coupling membrane component under the guiding of the vacuum system into
Enter next effect membrane component to heat raw water.
It is understood based on above-mentioned technical proposal, doughnut tablet coupled film distillation equipment of the invention has following beneficial to effect
Fruit：
(1) increasing membrane distillation disengagement area can be set by the number or multiple multiple-effect membrane distillations in parallel for increasing CMC parts
Standby to realize, when using the distillation equipment, unit volume membrane area can increase by 10 times or more than plate membrane distillation equipment, from
And reduce the cost of investment of board-like membrane distillation；
(2) by hollow fiber hydrophobic membrane and the coupling of tablet non-porous condenser film being solved current board-like membrane distillation unit bodies
The problem of integrated membrane area is small, while board-like membrane distillation multiple-effect easy to implement can be utilized to reduce the heat of doughnut membrane distillation again
Loss；In addition, membrane distillation is a heat transfer and the simultaneous evaporation process of mass transfer, concentration polarization and temperature difference polarization phenomena also can
Occur simultaneously, so as to influence the flux of membrane distillation and rejection, the present invention can also reduce film wetting, concentration polarization to a certain extent
Change and the polarized influence of the temperature difference；
(3) with hollow-fibre membrane replace plate membrane can reduce the later stage when film is damaged caused by maintenance cost；
(4) high-salt wastewater concentration, such as reverse osmosis/high pressure reverse osmosis concentrated water are can be not only used for, it can be with concentrating waste acid
The materials such as (sulfuric acid, phosphoric acid, hydrochloric acid, nitric acid), salkali waste；
(5) waste heat that this equipment can be generated with solar energy, plant area's waste heat, air compressor machine and refrigerator, which carries out coupling, reduces fortune
Row cost.
Description of the drawings
Figure 1A is the structure diagram of the doughnut tablet coupling single CMC parts of membrane distillation of the present invention；
Figure 1B is the structure diagram of single-action doughnut tablet coupling membrane component of the present invention；
Fig. 2 is the structure diagram of the doughnut tablet coupling multiple-effect membrane distillation equipment of the present invention；
Fig. 3 is the batch process flow of the five effect doughnut tablet coupled film distillation equipment concentrated phosphoric acid waste water of the present invention
Structure diagram；
Fig. 4 is the technique stream of the continuous five effect doughnut tablet coupled films distillation equipment concentration ammonium chloride waste-water of the present invention
Journey structure diagram.
In above-mentioned attached drawing, reference numeral meaning is as follows：
M, hollow fiber hydrophobic membrane, M, hollow fiber hydrophobic membrane part, C, non-porous condenser piece；
1st, raw water tank, 2, delivery pump, 3, condenser, 4, condensation water collection tank, 5, vacuum system, 6, raw water water outlet, 7,
Evaporation channel, 8, heating passage, 9, raw water inlet, 10, water outlet, 11, heating source inlet, 12, condensation-water drain, 13, steam
Send out channel outlet, 14, concentrated water outlet.
Specific embodiment
The present invention provides a kind of doughnut tablet coupled film distillation equipment, by hollow fiber hydrophobic membrane and tablet
The coupling of non-porous condenser film is small to solve the problems, such as current board-like membrane distillation unit volume membrane area, while utilizes board-like membrane distillation again
Multiple-effect easy to implement is so as to reducing the thermal losses of doughnut membrane distillation.
Specifically, doughnut tablet coupled film distillation equipment of the invention presss from both sides a hydrophobic membrane M couplings by two panels condensation film C
It closes, is provided with raw water inlet, concentrated water water outlet, heating feeder connection, condensed water water outlet and evaporation channel and goes out
Mouthful, wherein：
Hydrophobic membrane M is that hollow fiber hydrophobic membrane is encapsulated in the curtain membrane formed in a frame；
Two panels condensation film C is tablet non-porous film, for condensing the heat source in heating passage；The two panels condensation film C
The both sides of the hydrophobic membrane M are fixed on, a CMC structure is formed with the hydrophobic membrane M；
Raw water passage, heating passage and evaporation channel are formed on the CMC structure, wherein：
Raw water passage is formed by the gap between the two panels condensation film C and hydrophobic membrane M, connects raw water inlet
With concentrated water water outlet, raw water is inputted from raw water inlet, the concentrated water after concentrated water water outlet discharge evaporation and concentration；
Passage is heated, positioned at the CMC structure surface, the CMC structure being stacked with another is with net-like spacer is separated by and spells
It closes and is formed, for providing heat source, connection heating feeder connection and condensed water water outlet to the raw water passage, from heating passage
Entrance inputs heat source, and the heat source condensed from the discharge of condensed water water outlet after heat exchange；
Evaporation channel, using the tube side of the hollow fiber hydrophobic membrane in the hydrophobic membrane M as evaporation channel, for by original
The steam that water generates under heat source heating is exported from evaporation channel to be exported.
Wherein, hollow fiber hydrophobic membrane is to have supporter or the hollow-fibre membrane without supporter；
Preferably, the outer diameter of the doughnut on hollow fiber hydrophobic membrane is 0.8~3 millimeter, internal diameter is 0.5~2.8
Millimeter, aperture are 0.05~3 micron；
Preferably, the material of hollow fiber hydrophobic membrane is PTFE, PVDF, PP, PE, organic/organic or organic/inorganic close
Golden material；
Preferably, the material of frame is plastics, it is preferably PTFE, PVDF, PP, PE, organic/organic or organic/inorganic
Alloy material；
Preferably, the thickness of two panels condensation film C is 50~500 microns；
Preferably, the material of two panels condensation film C is PTFE, PVDF, PP, PE, organic/organic or organic/inorganic alloy
Material.
Wherein, hydrophobic membrane M is formed by the way that hollow fiber hydrophobic membrane is encapsulated in a plastic frame；
Wherein, the potted ends length of hollow fiber hydrophobic membrane is 1-10 centimetres, one end closing, other end opening or two
End is open；
Preferably, the effective length of hollow fiber hydrophobic membrane is 30-150 centimetres；
Preferably, the thickness of hydrophobic membrane M is 0.5-3 centimetres.
Wherein, net-like spacer is braiding or non-woven；
Preferably, the material of net-like spacer is PTFE, PVDF, PP, PE, organic/organic or organic/inorganic alloy material
Material；
Preferably, the mesh size of net-like spacer is 0.2~10 millimeter.
Wherein, doughnut tablet coupled film distillation equipment includes the CMC structure of multiple superpositions, the CMC knots of the superposition
It is separated by between structure by net-like spacer, forms doughnut tablet coupling single-action membrane component；
Preferably, depending on the superposition number of CMC structure is by required membrane area.
Wherein, multiple doughnut tablet coupling single-action membrane components are superimposed and connect to form the coupling of doughnut tablet
Multiple-effect membrane distillation equipment；
Wherein, the evaporation channel of a upper effect is connected with the heating passage of next effect；The raw water passage and next of a upper effect
The raw water passage of effect is connected；Condensed water water outlet is connected via a condensation water collection tank with vacuum system.
Wherein, the operation temperature of multiple-effect membrane distillation equipment is 40~100 DEG C, and during work, the first effect heating is using 70~150
DEG C heat source or use various waste heats, the waste heat or flue gas that such as low product steam or air compressor machine, freezer device operation generate give up
Heat, cooling water process waste heat or by coupling heating with solar energy equipment.
The invention also discloses a kind of membrane distillation system, including：
Doughnut tablet coupled film distillation equipment as described above；
Condensation water collection tank is installed on outside doughnut tablet coupled film distillation equipment, with the heating in membrane distillation equipment
Passage is connected with afterbody evaporation channel, and is connected with vacuum system；
Vacuum system, for reducing the pressure of the evaporation channel in the doughnut tablet coupled film distillation equipment to increase
Add the pressure difference of hollow fiber hydrophobic membrane both sides, be also used for guiding the trend of evaporated vapor and condensed water is extracted into condensation water collection
Tank, the evaporated vapor generated so as to each effect doughnut tablet coupling membrane component under the guiding of the vacuum system into
Enter next effect membrane component to heat raw water.
Wherein, which further includes a self-stripping unit integrally washed away with air water, the self-stripping unit with
The raw water inlet of doughnut tablet coupled film distillation equipment is connected with concentrated water water outlet, by controller control come periodically
Scrub hollow fiber hydrophobic membrane.
Wherein, the vacuum degree that vacuum system generates is 5-900mbar.
As a kind of preferred embodiment, the invention discloses a kind of doughnut tablets to couple multiple-effect membrane distillation equipment,
Doughnut tablet coupling multiple-effect membrane distillation equipment is equipped with raw water inlet, concentrated water water outlet, heating feeder connection, condensed water
Water outlet and evaporation channel outlet, including：
Hydrophobic membrane M, hydrophobic membrane M are encapsulated in formation curtain membrane in plastic frame for hollow fiber hydrophobic membrane；
Condensation film C, condensation film are tablet non-porous diaphragm, and the both sides and hydrophobic membrane M for being bonded in curtain membrane form CMC
Structure；
Raw water passage, raw water passage are formed by condensation diaphragm and hollow fiber hydrophobic membrane part；
Passage (condensation water channel) is heated, heating passage, which is stacked and is separated by with net-like spacer by two CMC parts, to be formed；
Evaporation channel, the evaporation channel is using the tube side of the hydrophobic membrane as evaporation channel；
Condensation water collection tank, the condensation water collection tank are installed on outside the membrane component, with the membrane component
Interior heating passage and last effect evaporation channel are connected；And it is connected with vacuum system.
Water inlet is used to supply raw water to doughnut tablet coupled film distillation equipment, and concentrated water water outlet is used for from membrane distillation
Equipment discharge concentration raw water (concentrated water), membrane distillation equipment heat for raw water to be made to be evaporated under the heating of heat source and generate steam
Feeder connection is used for membrane component supplied heat source, and for discharging condensed heat source, hydrophobic membrane is used for condensed water water outlet
Raw water, which generates steam on its surface and passes through hydrophobic membrane, enters evaporation channel, and condensation film heats passage for condensing heating source
Raw water is heated for heat source, raw water passage receives the heat content of heat source for raw water and generates evaporated vapor, and evaporation channel is used to receive
Collect the evaporated vapor that raw water generates and heat raw water for next effect, condensation water collection tank is used to collect the condensed water of steam generation.
Hydrophobic membrane is to have supporter or the hollow-fibre membrane without supporter, and outer diameter is 0.8~3 millimeter, it is interior through for 0.5~
2.8 millimeters, aperture is 0.05~3 micron, and the material of hydrophobic membrane is PTFE, PVDF, PP, PE, organic/organic or organic/inorganic
Alloy material；Plastic frame material is PTFE, PVDF, PP, PE, organic/organic or organic/inorganic alloy material；Condensation film is
Tablet non-porous film, 50~500 microns of thickness, condensation membrane material is PTFE, PVDF, PP, PE, organic/organic or organic/inorganic close
Golden material.Net-like spacer for braiding or it is non-woven, it is netted every lining material matter for PTFE, PVDF, PP, PE, it is organic/organic or organic/
Inorganic alloy material, mesh size are 0.2~10 millimeter.
In the doughnut tablet coupled film distillation equipment, curtain membrane (M) is by hollow fiber hydrophobic membrane both ends
It is encapsulated in what is formed in plastic frame；Potted ends length is 5-10 centimetres, and one end closing, the other end is open or both ends open；
Hollow-fibre membrane effective length is 30-150 centimetres；The membrane thickness is 0.5-3 centimetres.Two panels condensation film (C) is bonded in curtain
In CMC structure on the plastic frame of formula membrane, the gap among condensation film and hollow fiber hydrophobic membrane forms raw water passage.It is multiple
CMC parts, which are superimposed and are separated by by net-like spacer, forms single-action membrane component, depending on superposition number is by required membrane area；Two CMC it
Between gap for heating passage.The superposition series connection of multiple single-action membrane components is formed multiple-effect membrane distillation equipment.Multiple-effect film is steamed
The amount that membrane area increases processing raw water can also be increased by evaporating equipment parallel connection.A upper effect evaporation channel and next effect heating passage are seamless
It is logical；A upper effect raw water passage and next effect raw water passage unicom.Condensation-water drain and vacuum system are via condensation water collection tank phase
Unicom.
In doughnut tablet coupling multiple-effect membrane distillation equipment, multiple-effect membrane distillation equipment operating temperature is 40-100 DEG C,
First effect heating can use 90~150 DEG C of heat source, such as low product steam, can also use various waste heats, such as：Hot water, flue gas, deep fat
Deng or with other heat sources such as solar energy equipment couple to heat.During work, raw water imitates film from the first of multiple-effect membrane distillation equipment
Distillation component raw water inlet enters membrane distillation equipment, from last effect membrane component after being concentrated by evaporation in membrane distillation equipment
Concentrated water spout outflow；The evaporated vapor that each effect membrane component generates enters next effect membrane distillation under the guiding of vacuum system
The heating passage of component heats raw water.Vacuum system is used for reducing the pressure of evaporation channel to increase the pressure difference of hydrophobic membrane both sides
So as to improve flux；Also it is used for guiding the trend of evaporated vapor and condensed water is extracted into condensation water collection tank.Vacuum degree is 5-
900mbar.The original of one self-stripping unit integrally washed away with air water and doughnut tablet coupling multiple-effect membrane distillation equipment
The outlet of water inlet and concentrated water is connected, with PLC controls periodically to scrub hollow fiber hydrophobic membrane reduce probability that film soaks thus
Improve whole evaporation efficiency.
It is with reference to the accompanying drawings and right in conjunction with specific embodiments for technical scheme and advantage is made to become apparent from understanding
The present invention is further elaborated explanation.
Embodiment 1
The single CMC parts structure chart of membrane distillation is coupled for doughnut tablet as shown in Figure 1A, including hollow fiber hydrophobic membrane m
With hollow fiber hydrophobic membrane part M, non-porous condenser piece C；Figure 1B show single-action doughnut tablet coupling membrane component, by more
A CMC parts are superimposed and with net-like spacer S-phase every formation；As shown in Fig. 2, multiple single-action doughnut tablet coupling membrane components
The superimposed composition multiple-effect membrane distillation that is connected with raw water tank 1, delivery pump 2, condenser 3, condensation water collection tank 4, vacuum system 5 is set
Standby, the raw water water outlet 6 of a upper effect is connected with the raw water inlet of next effect, the evaporation channel 7 of a upper effect and adding for next effect
The passage of heat 8 is connected, this doughnut tablet coupling multiple-effect membrane distillation equipment is equipped with raw water inlet 9 and water outlet 10, heating source
Entrance 11, condensation-water drain 12, last effect evaporation channel outlet 13 and concentrated water outlet 14.Increasing membrane distillation disengagement area can be with
It is realized by increasing number or the multiple multiple-effect membrane distillation equipment of parallel connection of CMC parts.Delivery pump is used for conveying raw water.
Embodiment 2
As shown in figure 3, a batch five imitates doughnut tablet coupled film distillation equipment concentrated phosphoric acid waste water, from 0.5%
40% is concentrated into, phosphoric acid waste water preprocessed removal hardness, suspended matter and particulate matter before membrane distillation equipment is entered, with 95 DEG C of heat
Water provides heat source for it.The heating source inlet of heat source from the first effect membrane module enters doughnut tablet coupled film distillation equipment,
With the outflow system that is condensed after the phosphoric acid waste water exchange heat content into the first effect membrane distillation equipment.While phosphoric acid waste water is heated
Steam is generated under the control of vacuum degree and enters evaporation channel through hollow fiber hydrophobic membrane；Evaporated vapor draws vacuum system
The lower heating passage into the second effect is led to heat the phosphoric acid waste water from the first effect；The heating steam and phosphoric acid of second effect
Waste water is condensed after exchanging heat content, and condensation water collection tank is exited into from condensation-water drain as production under the guiding of vacuum system
Water；Steam is generated while the phosphoric acid waste water of second effect is heated under the control of vacuum degree through hollow fiber hydrophobic membrane to enter
Evaporation channel provides heating steam for triple effect.And so on, the phosphoric acid waste water being concentrated is dense from the 5th effect membrane component
Water out exits into phosphoric acid compensator and carries out cycling concentration, and the steam that the 5th effect generates is under the guiding of vacuum system from evaporation
Passage, which enters after external condenser is condensed by external cold water, flows into condensation water collection tank as production water.External one of equipment carries gas
The self-stripping unit that water is integrally scrubbed, can be controlled by PLC needs cleaning equipment interval, and the water for having cleaned equipment is returned to phosphoric acid
Compensator.
Embodiment 3
As shown in figure 4, a continuous five effect doughnut tablet coupled films distillation equipment concentration ammonium chloride waste-water, initial chlorine
Change ammonium TDS as 50,000ppm or so, ammonium chloride waste-water into preprocessed removal hardness before membrane distillation equipment, suspended matter and
Particulate matter adjusts pH value, and 100 DEG C of low product steam provide heat source for it.The heating source inlet of steam from the first effect membrane module enters
Doughnut tablet coupled film distillation equipment and the ammonium chloride waste-water for imitating membrane distillation equipment into first are condensed after exchanging heat content
As production water.While ammonium chloride waste-water is heated under the control of vacuum degree generate steam through hydrophobic membrane enter evaporation lead to
Road；Evaporated vapor carries out the ammonium chloride waste-water from the first effect into the heating passage of the second effect under the guiding of vacuum system
Heating；The heating steam and ammonium chloride waste-water of second effect are condensed after exchanging heat content, from condensed water under the guiding of vacuum system
Outlet exits into condensation water collection tank as production water；While the ammonium chloride waste-water of second effect is heated under the control of vacuum degree
Generation steam enters evaporated vapor passage through hydrophobic membrane and provides heating steam for triple effect.And so on, the chlorination being concentrated
Ammonium waste water exits into second set of five effect doughnut tablet coupling membrane distillation from the concentrated water outlet of the 5th effect membrane component and sets
It is standby to be concentrated again；It is external that the steam that 5th effect generates enters external condenser under the guiding of vacuum system from evaporation channel
Condensation water collection tank is flowed into after cold water condensation as production water.By the doughnut tablet coupled film distillation equipment of 5 sets of series connection, chlorine
TDS250,000ppm can be concentrated by changing ammonium concentration.External one self-stripping unit integrally scrubbed with air water of equipment, can pass through
PLC controls need cleaning equipment interval, and the water for having cleaned equipment is returned to ammonium chloride waste-water compensator.
By using the present invention, unit volume membrane area can increase by 10 times or more, so as to reduce board-like membrane distillation
Cost of investment.
Particular embodiments described above has carried out the purpose of the present invention, technical solution and advantageous effect further in detail
Describe in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to limit the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the protection of the present invention
Within the scope of.
Claims (10)
1. a kind of doughnut tablet coupled film distillation equipment, which is characterized in that the doughnut tablet coupling membrane distillation is set
It is standby to be coupled to form by one hydrophobic membrane M of two panels condensation film C folders, it is provided with raw water inlet, concentrated water water outlet, heating passage
Entrance, condensed water water outlet and evaporation channel outlet, wherein：
Hydrophobic membrane M is that hollow fiber hydrophobic membrane is encapsulated in the curtain membrane formed in a frame；
Two panels condensation film C is tablet non-porous film, for condensing the heat source in heating passage；The two panels condensation film C is fixed
In the both sides of the hydrophobic membrane M, a CMC structure is formed with the hydrophobic membrane M；
Raw water passage, heating passage and evaporation channel are formed on the CMC structure, wherein：
Raw water passage is formed by the gap between the two panels condensation film C and hydrophobic membrane M, connects raw water inlet and dense
Water water outlet inputs raw water from raw water inlet, the concentrated water after concentrated water water outlet discharge evaporation and concentration；
Heat passage, positioned at the CMC structure surface, the CMC structure being stacked with another with net-like spacer is separated by and split shape
Into for providing heat source, connection heating feeder connection and condensed water water outlet to the raw water passage, from heating feeder connection
Input heat source, and the heat source condensed from the discharge of condensed water water outlet after heat exchange；
Evaporation channel, using the tube side of the hollow fiber hydrophobic membrane in the hydrophobic membrane M as evaporation channel, for raw water to be existed
The lower steam generated of heat source heating is exported from evaporation channel to be exported.
2. doughnut tablet coupled film distillation equipment according to claim 1, which is characterized in that the doughnut is dredged
Moisture film is to have supporter or the hollow-fibre membrane without supporter；
Preferably, the outer diameter of the doughnut on the hollow fiber hydrophobic membrane is 0.8~3 millimeter, internal diameter is 0.5~2.8
Millimeter, aperture are 0.05~3 micron；
Preferably, the material of the hollow fiber hydrophobic membrane is PTFE, PVDF, PP, PE, organic/organic or organic/inorganic close
Golden material；
Preferably, the material of the frame is plastics, it is preferably PTFE, PVDF, PP, PE, organic/organic or organic/inorganic
Alloy material；
Preferably, the thickness of the two panels condensation film C is 50~500 microns；
Preferably, the material of the two panels condensation film C is PTFE, PVDF, PP, PE, organic/organic or organic/inorganic alloy
Material.
3. doughnut tablet coupled film distillation equipment according to claim 1, which is characterized in that the hydrophobic membrane M
It is formed by the way that hollow fiber hydrophobic membrane is encapsulated in a plastic frame；
Wherein, the potted ends length of the hollow fiber hydrophobic membrane is 1-10 centimetres, one end closing, other end opening or two
End is open；
Preferably, the effective length of the hollow fiber hydrophobic membrane is 30-150 centimetres；
Preferably, the thickness of the hydrophobic membrane M is 0.5-3 centimetres.
4. doughnut tablet coupled film distillation equipment according to claim 1, which is characterized in that the net-like spacer is
Braiding is non-woven；
Preferably, the material of the net-like spacer is PTFE, PVDF, PP, PE, organic/organic or organic/inorganic alloy material
Material；
Preferably, the mesh size of the net-like spacer is 0.2~10 millimeter.
5. doughnut tablet coupled film distillation equipment according to claim 1, which is characterized in that the doughnut is put down
Plate coupled film distillation equipment includes the CMC structure of multiple superpositions, is separated by between the CMC structure of the superposition by net-like spacer, shape
Single-action membrane component is coupled into doughnut tablet；
Preferably, depending on the superposition number of the CMC structure is by required membrane area.
6. doughnut tablet coupled film distillation equipment according to claim 5, which is characterized in that multiple hollow fibres
Dimension tablet coupling single-action membrane component is superimposed and connects to form doughnut tablet coupling multiple-effect membrane distillation equipment；
Wherein, the evaporation channel of a upper effect is connected with the heating passage of next effect；The raw water passage of a upper effect and next effect
Raw water passage is connected；Condensed water water outlet is connected via a condensation water collection tank with vacuum system.
7. doughnut tablet coupled film distillation equipment according to claim 6, which is characterized in that the multiple-effect membrane distillation
The operation temperature of equipment is 40~100 DEG C, and during work, the first effect heating is using 70~150 DEG C of heat source, it is preferred to use low product steam
Waste heat or fume waste heat that vapour or air compressor machine, freezer device operation generate, cooling water process waste heat or by with solar energy
Equipment coupling heating.
8. a kind of membrane distillation system, which is characterized in that including：
Doughnut tablet coupled film distillation equipment as described in claim 1 to 7 any one；
Condensation water collection tank, the condensation water collection tank is installed on outside the doughnut tablet coupling membrane component, with institute
It states heating passage in membrane component with afterbody evaporation channel to be connected, and is connected with vacuum system；
Vacuum system, for reducing the evaporation channel in the doughnut tablet coupled film distillation equipment pressure to increase in
The pressure difference of hollow fiber hydrophobic membrane both sides is also used for guiding the trend of evaporated vapor and condensed water is extracted into condensation water collection tank, from
And under the evaporated vapor that each effect doughnut tablet coupling membrane component generates enters under the guiding of the vacuum system
One effect membrane component heats raw water.
9. membrane distillation system according to claim 8, which is characterized in that the membrane distillation system further includes one with air water
The self-stripping unit integrally washed away, the raw water of the self-stripping unit and the doughnut tablet coupled film distillation equipment are intake
Mouth is connected with concentrated water water outlet, and periodically hollow fiber hydrophobic membrane is scrubbed by controller control.
10. membrane distillation system according to claim 8, which is characterized in that the vacuum degree that the vacuum system generates is 5-
900mbar。
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