CN207815928U - Closed continuity microwave drying recovery system for producing aerogel material - Google Patents
Closed continuity microwave drying recovery system for producing aerogel material Download PDFInfo
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- CN207815928U CN207815928U CN201720505577.7U CN201720505577U CN207815928U CN 207815928 U CN207815928 U CN 207815928U CN 201720505577 U CN201720505577 U CN 201720505577U CN 207815928 U CN207815928 U CN 207815928U
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- 230000007246 mechanism Effects 0.000 claims abstract description 53
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Landscapes
- Drying Of Solid Materials (AREA)
Abstract
The utility model discloses a kind of closed continuity microwave drying recovery systems for producing aerogel material, including closed drying chamber；At least one set of microwave generator is set to inside the drying chamber；Feed mechanism is set at the material inlet of the drying chamber；Material transport mechanism is set in the drying chamber, the treating material is made to be continued through from the working region of the microwave generator；Shedding mechanism is set at the material outlet of the drying chamber；Inert gas forced convection mechanism is connected to the drying chamber；Dedusting mechanism is connect with the drying chamber；Solvent recovery mechanism is connected to the drying chamber.Heat source used by the utility model is microwave heating, is a kind of mode of heating by dielectric loss from inside to outside, the drying especially suitable for aeroge thermal insulation material；The microwave heating has many advantages, such as that homogeneous heating, drying efficiency are high, heating cooling rate is fast.
Description
Technical field
The utility model is related to drying device fields, more particularly, to a kind of for producing the closed of aeroge thermal insulation material
Formula, continuity microwave drying recovery system, belong to the production technical field of aeroge thermal insulation material.
Background technology
Aeroge is known as 21 century one of new material most with prospects, relies on its Good All-around Property, including height
The excellent properties such as specific surface area, high porosity, low-density, superelevation heat-insulating property, ultralow dielectric and low refraction coefficient,
The fields such as heat-insulation and heat-preservation, energy conservation and environmental protection, petrochemical industry, drug release, aerospace have broad application prospects.Aeroge is sent out
At the beginning of exhibition, due to its expensive manufacturing cost and interminable preparation flow, it is set to can be only applied to aerospace, military project etc. special
Field.U.S. NASA take the lead in last century developmental research, widelyd popularize application of the aerogel material in aerospace field, such as
Stardust capture, space suit and space capsule heat-insulation and heat-preservation etc..With to aeroge it is further further investigation and to high-performance it is new
The increasingly demand of material, aeroge application field gradually extend, and the aerospace market high-end from early stage is civilian heat-insulated by now
Keep the temperature market；Relevant enterprise is also increasingly huge, and domestic and international aeroge enterprise rises sheer from level ground such as just bamboo shoot after rain.On the whole, state
Interior aeroge industry development is later, production technology and all can not show a candle to using standard the enterprises such as USA and Europe maturation.But in recent years with
The throe that Domestic Environment deterioration-energy shortage is brought, market are surging to green, energy-saving and environmental protection class new material cry, government's also phase
After putting into effect associated documents, industrialization process and the marketing of the new materials such as aeroge are vigorously supported.Due to a large amount of manpower object
Power is put into, and domestic aeroge academic research can be American-European horizontal shoulder to shoulder.But it is still lacked in amplification production and industrialization process
Weary accumulation.
Current aeroge production technology both at home and abroad is similar, includes mainly：Sol-gel-aging-solvent is replaced-changes
Property-(solvent displacement)-drying process, wherein drying process is the important factor for restricting aeroge development.From surpassing for development early stage
Critical ethyl alcohol is dried to the lower supercritical carbon dioxide drying of temperature and pressure, then has gradually developed subcritical drying, freezed and do
A variety of drying process such as dry, constant pressure and dry.Wherein supercritical drying can preferably keep the three-dimensional network knot of aerogel material
Structure, but due to its belong to discontinuity drying process, safe operation coefficient low (~35Mpa), equipment investment operating cost height etc. because
Element limitation, makes it be unfavorable for aeroge large-scale industrial production.Constant pressure and dry is considered as most easily realizing large-scale industry
Metaplasia produces drying mode, but the selection of constant pressure and dry technique, including carriage-type drying, pneumatic conveying drying, rotary drying, fluidized bed drying
Deng performance and production capacity to aerogel products have important influence.
As described above, aeroge has excellent heat preservation and insulation, but conventional atmospheric drying mode is all with thermal convection current-
Heat radiation is that heat transfer path is thermally dried product, to the uniform drying of aerogel material, drying time and product
Adverse effect can all be brought.Simultaneously as aeroge constant pressure and dry technique limits, in order to reduce the material brought in drying process
Structure collapses, most of dried mediums are all the organic solvents of the low surface tensions such as n-hexane, heptane and ethyl alcohol.Therefore, no matter
Be from aeroge production scale, production cost or environment influence etc. factors consider, how safety, it is economical and effective recycling this
An important factor for class organic solvent considers when becoming design drying process.
Studies have shown that microwave drying be different from traditional drying mode, the latter be by external heat source by thermal convection current-radiation by
Table and in conduction-type heating, be not suitable for the material of heat-conductive characteristic poor (or heat-proof quality is preferable), and microwave heating is material
Material has the interior heating caused by dielectric loss in electromagnetic field, is a kind of mode of heating from inside to outside, and the ingenious tradition that avoids adds
Hot mode heat transfer difficult problem caused by the excellent heat-proof quality of aerogel material.There are some reports to disclose using micro- at present
The method that wave drying prepares aeroge, but these methods do not fully consider aerogel property, in dust, solvent recovery, safety
Property and continuity etc. all still have more defect.
In conclusion how to develop a kind of uniform, the efficient, safety of heat transfer, economy, advantageous product performance stablize it is continuous
Drying system has become industry problem urgently to be resolved hurrily.
Utility model content
The main purpose of the utility model is to provide a kind of closed continuity microwaves for producing aerogel material
Dried recovered system, with overcome the deficiencies in the prior art.
To achieve the goals above, the technical solution of the utility model is as follows：
The utility model embodiment discloses a kind of closed continuity microwave drying for producing aerogel material time
Receipts system, including：
Closed drying chamber；
At least one set of microwave generator is set in the drying chamber, and is at least distributed in the drying chamber to heat
Indoor at least partly material；
Feed mechanism is set at the material inlet of the drying chamber, and is at least used to pending material inputting institute
State drying chamber；
Material transport mechanism is set in the drying chamber, and is at least used for the pending material from the object
Material inlet is continuously transported at the material outlet of the drying chamber, and makes the treating material from the microwave generator
It is continued through in working region；
Shedding mechanism is set at the material outlet of the drying chamber, and is at least used to accept from the material outlet
Material exporting, being disposed；
Inert gas forced convection mechanism is connected to the drying chamber, and at least providing inert gas and make institute
Inert gas convection current in the drying chamber is stated, and make the inert gas carry the indoor volatility of drying chamber to have
Solvent enters solvent recovery mechanism；
Dedusting mechanism is connect with the drying chamber, at least enters solvent time to reduce the dust that the material generates
Receive mechanism；
Solvent recovery mechanism is connected to the drying chamber, is at least had to recycle the indoor volatility of the drying chamber
Solvent；
Monitoring unit includes at least any one in temperature sensor, pressure sensor, oxygen conten analyser or two kinds
Above combination, at least being monitored to more than one indoor system security parameter of the drying chamber；And
Control unit, at least to regulate and control the dried recovered system each component working condition.
One of preferred embodiment as the utility model, the feed mechanism include feeding screw, magnetic filter, gold
Belong to detector and electric closed valve door, the magnetic filter, metal detector, electric closed valve door and the screw feeding
The feed inlet of device is sequentially connected, and the metal detector is arranged with electric closed valve gate interlock.
One of preferred embodiment as the utility model, the material transport mechanism is including an at least upper layer conveyer belt and extremely
Few lower layer's conveyer belt makes wherein the feeding end of the discharging end of upper layer conveyer belt lower layer's conveyer belt corresponding to one is located at homonymy
Material is obtained after the output of the discharging end of upper layer conveyer belt i.e. into the feeding end of lower layer's conveyer belt.
Further, it is additionally provided with plow-shape material rotating plate on the upper layer conveyer belt and/or lower layer's conveyer belt.
Further, it is also approached at the discharging end of the upper layer conveyer belt and is provided with scraper plate, the scraper plate is at least scraping
Except the material of adherency on a moving belt.
Further, also it is equipped with baffle at the discharging end of the conveyer belt, the baffle is at least preventing powder
Dirt is spread.
One of preferred embodiment as the utility model, the shedding mechanism include level-one discharge bin, are set to described one
Weighing module, the dise feeder that is connect with the level-one discharge bin on grade discharge bin and another with the dise feeder
The two level discharge bin of one end connection.
Further, the junction of dise feeder is provided with electric closed valve door in the level-one discharging.
Further, the junction on the dise feeder with the two level discharge bin is provided with electric closed valve door.
Further, the discharge outlet of the two level discharge bin is provided with electric closed valve door.
One of preferred embodiment as the utility model, the inert gas forced convection mechanism include sequentially connected magnetic
Flow fan, condenser, gas-liquid separator and heater, the other port relative to its material inlet of the drying chamber
It is provided with inert gas entrance, the magnetic current wind turbine is connected to the drying chamber, and the heater enters with the inert gas
Mouth connection.
Further, the inert gas entrance is connected to gas distributor.
Further, it is connected by relief valve between the gas-liquid separator and heater.
One of preferred embodiment as the utility model, the solvent recovery mechanism includes solvent recycling can, described
Organic solvent recycling can is connect with the gas-liquid separator.
Further, the dedusting mechanism includes bag filter, and the bag filter is connected to the drying chamber,
And it is connect with the magnetic current wind turbine with by accurate filter.
Further, the bag filter is connect with back-blowing device, and the back-blowing device is for described in periodic cleaning
Dust in bag filter includes at least the purge gas entrance being connected to the bag filter.
One of preferred embodiment as the utility model, the oxygen conten analyser is connect with the drying chamber, described
Oxygen conten analyser and the inert gas entrance valve interlocking for being set to the inert gas entrance are arranged.
One of preferred embodiment as the utility model, the pressure sensor are connect with the drying chamber, described dry
Automatic drain valve is connected on dry chamber, the pressure sensor is arranged with automatic drain valve interlocking.
One of preferred embodiment as the utility model, multiple temperature sensors are connect with the drying chamber, institute
Temperature sensor is stated with microwave generator interlocking to be arranged.
One of preferred embodiment as the utility model offers visual window in the drying chamber.
Compared with prior art, the advantages of the utility model at least that:
1) heat source used by the utility model is microwave heating, is a kind of heating side by dielectric loss from inside to outside
Formula, the drying especially suitable for aeroge thermal insulation material；The microwave heating has homogeneous heating-drying efficiency height-heating-
The advantages that cooling rate is fast.
2) drying system of the utility model design is continuity drying system, is being by controlling heating power and material
The residence time (passing through conveyer rotation speed regulating and controlling) reaches scale continuous production, it can be achieved that discharging while feeding in system.
3) drying system of the utility model design is closed recovery system, can return the organic solvent condensate of volatilization
It receives, organic efficiency is more than 98%, thus the utility model can effectively reduce aeroge production cost, while environmental pollution
It is small.
4) drying system of the utility model design has excellent security performance, and multiple oxygen contents detections are arranged in system
Instrument-pressure detecting instrument (being interlocked with automatic drain valve), the interlocking of temperature monitor-microwave generator power, metal detector (with
Microwave generator interlocks), magnetic filter, the elements such as material conveying-material inlet valve interlocking, so as to ensure that drying was run
The safety of journey system.
5) drying system of the utility model design, material are transported in drying chamber according to folding cycles route,
It can be effectively increased drying time of the material in system, meanwhile, improve microwave energy utilization rate；In addition, the utility model
Design is provided with plow-shape material rotating plate in conveyer belt, can further enhance the uniform drying of material.
6) the magnetic current wind turbine of the dried recovered system of the utility model design is arranged in material green end (at material inlet), energy
It is enough largely to avoid causing dust in system；Meanwhile in order to be further reduced dust in system, in fan outlet and inertia
Gas access, which goes out, is all provided with filter, being capable of dust effectively in barrier systems.
7) drying system of the utility model design has extensive universality, can adapt in most of inflammable and explosive substances
Matter；Meanwhile, it is capable to be effectively used in combination with other drying modes, such as pneumatic conveying drying, heater will be added before inert gas entrance
Form microwave airflowdrying combined drying system.
Description of the drawings
In order to illustrate more clearly of the utility model structure feature and technical essential, below in conjunction with the accompanying drawings and specific embodiment party
The utility model is described in detail in formula.
Fig. 1 is the closed continuity microwave drying recovery system disclosed by the utility model for producing aerogel material
Planar structure schematic diagram；
Fig. 2 is the sample schematic diagram of dried silica aeroge heat-insulating granules disclosed by the utility model；
Fig. 3 is the sample schematic diagram that dried silica aeroge disclosed by the utility model keeps the temperature powder.
Reference sign：1- microwave generators；2- temperature sensors；3- oxygen conten analysers；4- plow-shape material rotating plates；
5- inert gas entrances and gas distributor；6- baffles；7- scraper plates；The upper layers 91- conveyer belt；92- lower layers conveyer belt；10- is visual
Window；11- level-one discharge bins；12- Weighing modules；13- dise feeders；14- two level discharge bins；15- feeding screws；16- gold
Belong to detector；17- magnetic filters；18- bag filters；19- back-blowing devices；20- purge gas entrances；21- secondary filters
Device；22- magnetic current wind turbines；23- organic solvent recycling cans；24- gas-liquid separators；25- condensers；26- refrigerant exits；27- refrigerants
Entrance；28- relief valves；29- heaters；30- pressure sensors；31- electric closed valve doors.
Specific implementation mode
Below with reference to the attached drawing in the present embodiment, the technical solution in embodiment specifically, clearly and completely retouch
It states.
Referring to shown in Fig. 1-3, the utility model embodiment discloses a kind of closed company for producing aerogel material
Continuous property microwave drying recovery system, including：
Closed drying chamber 32；
At least one set of microwave generator 1 is set to inside drying chamber 32, and is at least distributed in drying chamber 32 to heat
Interior at least partly material；
Screw feed mechanism, screw feed mechanism are set at the material inlet of drying chamber 32, and are at least used to wait locating
The material of reason inputs drying chamber 32；
Material transport mechanism, material transport mechanism are set in drying chamber 32, and are at least used for the pending object
Material is continuously transported to from the material inlet at the material outlet of drying chamber 32, and the treating material is made to occur from microwave
It is continued through in the working region of device 1；
Shedding mechanism is set at the material outlet of drying chamber 32, and is at least used to accept defeated from the material outlet
Material going out, being disposed；
Inert gas forced convection mechanism is connected to drying chamber 32, and at least providing inert gas and make described
Inert gas convection current in drying chamber 32, and the inert gas is made to carry the volatile organic solvent in drying chamber 32
Into solvent recovery mechanism；Inert gas forced convection mechanism includes at least inert gas entrance and gas distributor 5, indifferent gas
Body entrance is connected to gas distributor 5, and wherein inert gas includes any one in nitrogen, carbon dioxide, argon gas；
Dedusting mechanism is connect with drying chamber 32, at least enters solvent recovery mechanism to reduce the dust of material generation,
It should be noted that：Dust is easy tod produce by dry material；
Solvent recovery mechanism is connected to drying chamber 32, at least organic molten to recycle the volatility in drying chamber 32
Agent；
Monitoring unit includes at least any one in temperature sensor, pressure sensor, oxygen conten analyser or two kinds
Above combination, at least being monitored to more than one system security parameter in drying chamber 32；And
Control unit, at least to regulate and control the dried recovered system each component working condition.
Specifically, screw feed mechanism includes feeding screw 15, magnetic filter 17, metal detector 16 and electronic
Sealed valve 31, magnetic filter 17, metal detector 16, electric closed valve door 31, feeding screw feed inlet connect successively
It connects, and metal detector 16 is arranged with the interlocking of electric closed valve door 31, and the discharge port of feeding screw stretches to drying chamber
In 32, it is located at the top of material transport mechanism.Wherein, magnetic filter 17 can filter the metal impurities in detection material, together
When the metal detector 16 that is arranged can monitor the metal impurities omitted and do not filtered, and set with the interlocking of electric closed valve door 31
It sets, once containing metallics in monitoring material, then electric closed valve door 31 is automatically closed, stops charging.
Specifically, material transport mechanism includes an at least upper layer conveyer belt 91 and at least lower layer's conveyer belt 92, wherein one
The feeding end of corresponding to the one lower layer's conveyer belt of the discharging end of upper layer conveyer belt 91 92 is located at homonymy so that material is from upper layer conveyer belt
I.e. into the feeding end of lower layer's conveyer belt 92 after 91 discharging end output.Material is sent to lower layer's conveyer belt by upper layer conveyer belt 91
92 so that form the transit route of folding cycles.The conveyer belt can be sized to multilayer according to drying capacity, to increase
Drying time of the material in drying chamber 32.
Material is sent to discharging end by described positioned at the feeding end of upper layer conveyer belt 91, then falls into positioned at lower layer's conveyer belt
On 92, material is sent to discharging end by described positioned at the feeding end of lower layer's conveyer belt 92 again, so as to form folding cycles
Transit route can so increase residence time of the material in drying chamber 32, to improve drying effect.
Further, plow-shape material rotating plate 4, plow-shape material rotating plate 4 are provided on upper layer conveyer belt 91 and/or lower layer's conveyer belt 92
It can be with turning over materials, so as to enhance material drying effect；It is also approached at the discharging end of upper layer conveyer belt 91 and is provided with scraper plate
7, the scraper plate 7 at least to strike off the material of adherency on a moving belt, avoids material from being adhered on upper layer conveyer belt 91；Transmission
The baffle 6 extended downwardly outward is also equipped with 9 discharging end, baffle 6 is used to reduce dust caused by material falls,
To prevent dust recycling.
Specifically, shedding mechanism includes level-one discharge bin 11, the Weighing module 12 that is set on level-one discharge bin 11, with one
Grade discharge bin 11 dise feeder 13 connected and the two level discharge bin 14 being connect with the other end of dise feeder 13.
Further, the junction of dise feeder 13 is provided with electric closed valve door 31 in level-one discharging；And/or
The junction of two level discharge bin 14 is provided with electric closed valve door 31 on dise feeder 13；And/or two level discharge bin 14
Discharge outlet is also equipped with electric closed valve door.
Material after drying is fallen on by being located under lower layer's conveyer belt 92 in level-one discharge bin 11, when reaching constant weight, circle
13 automatic discharging of disk feeder to two level discharge bin 14, close by the electric closed valve door 31 of discharging rear disk feeder 13, then,
Electric closed valve door 31 on two level discharge bin 14 opens discharging, and system is still in air-tight state at this time.
Specifically, inert gas forced convection mechanism includes sequentially connected magnetic current the wind turbine 22, (condenser 25 of condenser 25
With refrigerant exit 26 and refrigerant inlet 27), gas-liquid separator 24 and heater 29, magnetic current wind turbine 22 connects with drying chamber 32
Logical, heater 29 is connected to inert gas entrance；It is connected by relief valve 28 between gas-liquid separator 24 and heater 29.
Solvent recovery mechanism includes solvent recycling can 23, and organic solvent recycling can 23 is connect with gas-liquid separator 24.
Dedusting mechanism includes bag filter 18, and bag filter 18 is connected to drying chamber 32, and with pass through accurate mistake
Filter 21 is connect with magnetic current wind turbine 22；Preferably, bag filter 18 is connect with back-blowing device 19, and back-blowing device 19 is for fixed
Phase clears up the dust in bag filter 18, includes at least the purge gas entrance 20 being connected to bag filter 18.
The organic solvent of volatilization introduces condenser 25 by magnetic current wind turbine 22, and condenser 25 is by the organic gas condensing of volatilization
At reflux, the gas-liquid separator 24 positioned at 25 lower section of condenser separates condensed organic solvent and inert gas, then, cold
Organic solvent after solidifying flows into organic solvent recycling can 23 and is recycled, and inert gas is then recycled into drying chamber 32.
And the utility model designs having heaters 29, can the inert gas of cycle entered drying chamber 32 by heater 29
It is heated before, to increase dry materials speed.Bag filter 18 is connected to drying chamber 32 and can largely reduce
Dust, back-blowing device 19 are capable of the dust of periodic cleaning cloth bag absorption.
Specifically, oxygen conten analyser 3 is connect with drying chamber 32, oxygen conten analyser 3 and it is set to the indifferent gas
The inert gas entrance valve interlocking setting of body entrance, pressure sensor 30 connect with drying chamber 32, are connected in drying chamber 32
Automatic drain valve, pressure sensor 30 are arranged with automatic drain valve interlocking；Oxygen content and inert gas entrance in drying chamber 32
Valve interlocking setting, can use oxygen in inert gas replacement system, and exclude oxygen by automatic drain valve in time.
Multiple temperature sensors 2 are connect with drying chamber 32, and temperature sensor 2 is arranged with the interlocking of microwave generator 1, when super
The power of microwave generator 1 is then reduced when crossing safe temperature；In addition, visual window 10 is offered in drying chamber 32, by visual
Window 10 can observe the drying regime of material.
Control unit respectively with microwave generator 1, screw feed mechanism, material transport mechanism, shedding mechanism, inert gas
Input mechanism and dedusting and the electrical connection of solvent recovery mechanism.Control unit can each mechanism work according to setting sequence,
Control unit uses PLC control modules.
The technical solution of the utility model is further described below in conjunction with specific embodiment.
Embodiment 1
Using industrial M3.2 grades of industrial waterglass, 31% hydrochloric acid as raw material, 3 times and 2 times are diluted with industry water respectively.By hydrochloric acid
Dilution is added in waterglass dilution, adjusts Ph=9, is poured into ageing tank after uniform stirring, be warming up to 60 DEG C, it is small to stand 3
When after obtain silica hydrogel；Then, with ethyl alcohol/gel volume than 1:1 ethyl alcohol sets silica hydrogel repeatedly
It changes twice, 4 hours every time, to obtain silica alcogel；After the completion of displacement, then with volume ratio 1:1 ethyl alcohol and front three
Base chlorosilane mixed liquor pours into silica alcogel, and floods silica alcogel, continues heat preservation two hours, to obtain
It is to be dried spare to obtain hydrophobic silica alcogel.
The microwave drying recovery system for producing aeroge thermal insulation material for starting the utility model, opens automatic-discharging
Valve first uses nitrogen purge system, and microwave generator 1 is opened after oxygen content is up to standard, and microwave power modulates 50kw；At the same time, it opens
Dynamic condenser 25, material transport mechanism (10mm/s), screw feed mechanism (300kg/h), have cooperateed with charging rate and spiral to send
The speed of glassware 15, temperature stabilizes to 150 DEG C in drying system；By that can continue to obtain silica after shedding mechanism discharging
Aeroge heat-insulating granules.
The aerosil heat-insulating granules density of acquisition is 0.1g/cm3, specific surface area 650m2/ g, thermal coefficient
For 0.018W/mk.Pass through this system drying ethanol condensing recovery efficiency>98%.
Embodiment 2
With industrial ethyl orthosilicate (40%) raw material, second alcohol and water is solvent, and 31% hydrochloric acid is catalyst.Raw material proportioning is
n(TEOS)： n(H2O)：n(EtOH)：N (HCl)=1:4:6:7.5×10-3.Mixed liquor is placed at 90 DEG C after the completion with liquid
Condensing reflux 0.5 arrives hydrolyzate, adds ammonium hydroxide (0.05mol/L) and adjusts solution PH=8；It pours into ageing tank again, 40 DEG C old
Change 3 hours, obtains silica wet gel；Then, with hexane/gel volume than 1:1 hexane soaks silica wet gel
Bubble displacement in 4 hours is primary, to obtain silica dioxide gel；After the completion of displacement, then with volume ratio 1:1 hexane alcohol and trimethyl
Chlorosilane mixed liquor pours into silica dioxide gel, and floods silica dioxide gel, continues heat preservation two hours, hydrophobic to obtain
Silica dioxide gel, redisperse hydrophobic titanium dioxide Silica hydrogel are to be dried spare to obtain hydrophobic silica dispersion pulp.
The microwave drying recovery system for producing aeroge thermal insulation material for starting the utility model, opens automatic-discharging
Valve first uses nitrogen purge system, and microwave generator 1 is opened after oxygen content is up to standard, and microwave power modulates 30kw.Meanwhile starting cold
Condenser 25, material transport mechanism (10mm/s), screw feed mechanism (200kg/h), have cooperateed with charging rate and feeding screw
15 feeding speed, temperature stabilizes to 140 DEG C in drying system；By that can continue to obtain silica after shedding mechanism discharging
Aerogel powder.
The aerosil heat-insulating granules density of acquisition is 0.06g/cm3, specific surface area 1000m2/ g, heat conduction system
Number is 0.015W/mk.Hexane condensing recovery efficiency is dried by this system>98%.
Embodiment 3
With six trichloride hydrate aluminum feedstocks, second alcohol and water is solvent, and 1,2- propylene oxide is flocculation aid, and fixed molar ratio is
n(AlCl3·6H2O)：n(H2O)：n(EtOH)：N (PO)=1:35:12:8.With being poured into ageing tank after the completion of liquid, 40 are heated
DEG C, it stands 2 hours and obtains aluminium oxide wet gel.With ethyl alcohol/gel volume than 1:1 ethyl alcohol replaces aluminium oxide wet gel repeatedly
Twice, every time 4 hours, to obtain aluminium oxide alcogel；After the completion of displacement, then with volume ratio 1:1 ethyl alcohol and trimethyl chlorine
Silane mixture liquid pours into aluminium oxide wet gel, floods aluminium oxide wet gel, continues heat preservation two hours, to obtain hydrophobic oxidation
Alfol gel, with to be dried spare.
The microwave drying recovery system for producing aeroge thermal insulation material for starting the utility model, opens automatic-discharging
Valve first uses nitrogen purge system, and microwave generator 1 is opened after oxygen content is up to standard, and microwave power modulates 30kw.Start condensation simultaneously
Device 25, material transport mechanism (10mm/s), screw feed mechanism (200kg/h), have cooperateed with charging rate and feeding speed, dry
Temperature stabilizes to 150 DEG C in system；By that can continue to obtain alumina aerogels heat-insulating granules after shedding mechanism discharging.
The aerosil heat-insulating granules density of acquisition is 0.1g/cm3, specific surface area 500m2/ g, thermal coefficient
For 0.020W/mk.Pass through this system drying ethanol condensing recovery efficiency>98%.
Above-mentioned specific implementation mode only illustrates the technical concept and structure feature of the utility model, it is therefore intended that allow ripe
The stakeholder for knowing technique can implement according to this, but above said content is not intended to limit the scope of protection of the utility model,
Any equivalent change or modification made by every Spirit Essence according to the utility model, should all fall into the protection of the utility model
Within the scope of.
Claims (10)
1. a kind of closed continuity microwave drying recovery system for producing aerogel material, it is characterised in that：Including：
Closed drying chamber；
At least one set of microwave generator is set in the drying chamber, and is at least distributed in the drying chamber to heat
At least partly material；
Feed mechanism is set at the material inlet of the drying chamber, and is at least used for pending material input is described dry
Dry chamber；
Material transport mechanism is set in the drying chamber, and at least is used to enter the pending material from the material
At the material outlet for continuously transporting to the drying chamber at mouthful, and make the treating material from the work of the microwave generator
It is continued through in region；
Shedding mechanism is set at the material outlet of the drying chamber, and is at least used to accept to export from the material outlet
, the material being disposed；
Inert gas forced convection mechanism is connected to the drying chamber, and at least providing inert gas and make described lazy
Property gas convection current in the drying chamber, and so that the inert gas is carried the indoor volatility of drying chamber organic molten
Agent enters solvent recovery mechanism；
Dedusting mechanism is connect with the drying chamber, at least enters solvent recovery machine to reduce the dust that the material generates
Structure；
Solvent recovery mechanism is connected to the drying chamber, at least organic molten to recycle the indoor volatility of the drying chamber
Agent；
Monitoring unit, include at least temperature sensor, pressure sensor, in oxygen conten analyser any one or it is two or more
Combination, at least being monitored to more than one indoor system security parameter of the drying chamber；And
Control unit, at least to regulate and control the dried recovered system each component working condition.
2. the closed continuity microwave drying recovery system according to claim 1 for producing aerogel material,
It is characterized in that：The feed mechanism includes feeding screw, magnetic filter, metal detector and electric closed valve door, institute
The feed inlet for stating magnetic filter, metal detector, electric closed valve door and the feeding screw is sequentially connected, and the gold
Belong to detector with electric closed valve gate interlock to be arranged.
3. the closed continuity microwave drying recovery system according to claim 1 for producing aerogel material,
It is characterized in that：The material transport mechanism includes an at least upper layer conveyer belt and at least lower layer's conveyer belt, wherein a upper layer passes
The feeding end of the discharging end of band lower layer's conveyer belt corresponding to one is sent to be located at homonymy so that the discharging end of material from upper layer conveyer belt is defeated
Enter the feeding end of lower layer's conveyer belt after going out.
4. the closed continuity microwave drying recovery system according to claim 3 for producing aerogel material,
It is characterized in that：It is additionally provided with plow-shape material rotating plate on the upper layer conveyer belt and/or lower layer's conveyer belt；And/or the upper layer transmission
It is also approached at the discharging end of band and is provided with scraper plate, the scraper plate is at least striking off adherency material on a moving belt；And/or
Also it is equipped with baffle at the discharging end of the conveyer belt, the baffle is at least preventing dust recycling.
5. the closed continuity microwave drying recovery system according to claim 1 for producing aerogel material,
It is characterized in that：The shedding mechanism includes level-one discharge bin, is set on the level-one discharge bin Weighing module, with described one
The dise feeder of grade discharge bin connection and the two level discharge bin being connect with the other end of the dise feeder.
6. the closed continuity microwave drying recovery system according to claim 5 for producing aerogel material,
It is characterized in that：The junction of dise feeder is provided with electric closed valve door in the level-one discharging；And/or the disk
Junction on feeder with the two level discharge bin is provided with electric closed valve door；And/or the discharging of the two level discharge bin
It is provided with electric closed valve door at mouthful.
7. the closed continuity microwave drying recovery system according to claim 1 for producing aerogel material,
It is characterized in that：The inert gas forced convection mechanism include sequentially connected magnetic current wind turbine, condenser, gas-liquid separator and
The other port relative to its material inlet of heater, the drying chamber is provided with inert gas entrance, the magnetic current
Wind turbine is connected to the drying chamber, and the heater is connected to the inert gas entrance, the inert gas entrance and gas
Body distributor is connected to, and is connected by relief valve between the gas-liquid separator and heater.
8. the closed continuity microwave drying recovery system according to claim 7 for producing aerogel material,
It is characterized in that：The solvent recovery mechanism includes solvent recycling can, the organic solvent recycling can and the gas-liquid separation
Device connects.
9. the closed continuity microwave drying recovery system according to claim 7 for producing aerogel material,
It is characterized in that：The dedusting mechanism includes bag filter, and the bag filter is connected to the drying chamber, and with pass through
Accurate filter is connect with the magnetic current wind turbine, and the bag filter is connect with back-blowing device, and the back-blowing device is for fixed
Phase clears up the dust in the bag filter, includes at least the purge gas entrance being connected to the bag filter.
10. the closed continuity microwave drying recovery system according to claim 7 for producing aerogel material,
It is characterized in that：The oxygen conten analyser is connect with the drying chamber, the oxygen conten analyser and is set to the inertia
The inert gas entrance valve interlocking setting of gas access；And/or the pressure sensor is connect with the drying chamber, it is described
Automatic drain valve is connected in drying chamber, the pressure sensor is arranged with automatic drain valve interlocking；And/or Duo Gesuo
It states temperature sensor to connect with the drying chamber, the temperature sensor is arranged with microwave generator interlocking；And/or it is described
Visual window is offered in drying chamber.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106969619A (en) * | 2017-05-09 | 2017-07-21 | 苏州同玄新材料有限公司 | Closed continuity microwave drying recovery system for producing aerogel material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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