CN110895093B - Dust-free microwave vacuum drying device for optical lens resin raw material - Google Patents
Dust-free microwave vacuum drying device for optical lens resin raw material Download PDFInfo
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- CN110895093B CN110895093B CN202010001398.6A CN202010001398A CN110895093B CN 110895093 B CN110895093 B CN 110895093B CN 202010001398 A CN202010001398 A CN 202010001398A CN 110895093 B CN110895093 B CN 110895093B
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- 239000002994 raw material Substances 0.000 title claims abstract description 103
- 230000003287 optical effect Effects 0.000 title claims abstract description 35
- 239000011347 resin Substances 0.000 title claims abstract description 30
- 229920005989 resin Polymers 0.000 title claims abstract description 30
- 238000001291 vacuum drying Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 145
- 238000004140 cleaning Methods 0.000 claims abstract description 131
- 238000001035 drying Methods 0.000 claims abstract description 130
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 110
- 238000004506 ultrasonic cleaning Methods 0.000 claims abstract description 73
- 230000007246 mechanism Effects 0.000 claims abstract description 56
- 238000003860 storage Methods 0.000 claims abstract description 48
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 46
- 239000007788 liquid Substances 0.000 claims abstract description 35
- 238000007599 discharging Methods 0.000 claims abstract description 33
- 230000001105 regulatory effect Effects 0.000 claims abstract description 23
- 238000000926 separation method Methods 0.000 claims abstract description 23
- 239000012528 membrane Substances 0.000 claims description 44
- 238000007664 blowing Methods 0.000 claims description 29
- 239000012535 impurity Substances 0.000 claims description 29
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 18
- 238000001914 filtration Methods 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 14
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 238000004383 yellowing Methods 0.000 abstract description 6
- 239000008367 deionised water Substances 0.000 abstract description 4
- 229910021641 deionized water Inorganic materials 0.000 abstract description 4
- 239000000428 dust Substances 0.000 description 38
- 238000010438 heat treatment Methods 0.000 description 18
- 238000012545 processing Methods 0.000 description 15
- 238000001746 injection moulding Methods 0.000 description 12
- 239000007789 gas Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 239000003344 environmental pollutant Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000003749 cleanliness Effects 0.000 description 4
- 238000011068 loading method Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000007791 dehumidification Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000000088 plastic resin Substances 0.000 description 3
- 239000008213 purified water Substances 0.000 description 3
- 238000012797 qualification Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 239000010963 304 stainless steel Substances 0.000 description 2
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000002808 molecular sieve Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
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- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000007602 hot air drying Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
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- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
- F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
- F26B3/347—Electromagnetic heating, e.g. induction heating or heating using microwave energy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/14—Removing waste, e.g. labels, from cleaning liquid; Regenerating cleaning liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/003—Supply-air or gas filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Electromagnetism (AREA)
- Biomedical Technology (AREA)
- Biotechnology (AREA)
- Physics & Mathematics (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The embodiment of the invention discloses a dust-free microwave vacuum drying device for optical lens resin raw materials, which comprises a control cabinet, wherein the air outlet end of an air supply mechanism is connected with a pressure regulating valve, the pressure regulating valve is connected with the air inlet end of a compressed air film separation dryer, the air outlet end of the compressed air film separation dryer is connected with the air inlet end of a dry air storage tank, and the air outlet end of the dry air storage tank is connected with a feeding mechanism and a discharging mechanism; the feeding mechanism applies the venturi principle to send the raw materials to be dedusted and dried into the ultrasonic cleaning drying chamber, and the discharging mechanism applies the venturi principle to send the raw materials after dedusting and drying into the anti-repeated suction hopper; the raw materials are cleaned through deionized water cleaning liquid and an ultrasonic vibration generator, a vacuum pump and a microwave generator are simultaneously started during drying, drying of the raw materials is accelerated, nitrogen is filled into an ultrasonic cleaning drying chamber after drying, and the raw materials are prevented from re-absorbing moisture and being oxidized and yellowing. The raw materials are thoroughly cleaned, the drying speed is high, the effect is good, and no new pollution is introduced.
Description
Technical Field
The embodiment of the invention relates to the technical field of drying equipment, in particular to a dust-free microwave vacuum drying device for an optical lens resin raw material.
Background
At present, when plastic optical resin is used for injection molding and processing of mobile phone optical lens products, firstly, optical resin raw materials are fully dried, a traditional dryer adopts a circulating heating mode of blowing hot air in a drying barrel and absorbing moisture by a molecular sieve to dry for more than 3 hours at the temperature range of 105-120 ℃, better equipment can adopt nitrogen protection, and the problem that the product cannot meet the light distribution requirement because the hydrolysis phenomenon of the plastic resin raw materials is caused by the high temperature (250-280 ℃) during injection molding and processing of water in the raw materials is prevented. In addition, under the condition of thousand-level cleanliness production environment, the factory for processing the mobile phone lens is required to be in a traditional dryer, the dust can be discharged to the workshop environment due to the fact that hot air circulation and molecular sieve regeneration factors exist, the requirement of a far-exceeding thousand-level purification workshop is determined by the working principle, the operation guarantee difficulty of a purification system is intangibly increased, and the operation guarantee difficulty is an important factor for reducing the product qualification rate, but a better drying mode is not found at present to solve.
In addition, in the drying process of the traditional dehumidification dryer, powder and impurities are always brought into the raw materials due to the fact that the fan moving parts are worn when the hot air is blown and heated in a circulating mode, dust impurities smaller than the filtering precision can enter the raw materials even if the density of the filter screen is increased, the impurities are directly absorbed in the raw materials to be brought into products from the raw materials during injection molding, and a plurality of high-requirement optical technical indexes are reduced to cause rejection of processed lens products. The biggest quality defect of the traditional dehumidifying dryer is that dust in raw materials cannot be thoroughly removed.
And in addition, in the process of shipping and packaging raw materials, static electricity is generated due to collision friction, so that various fine pollutants (dust, oil-gas suspended matters and the like) in the air are adsorbed, the product quality defect is also caused, the qualification rate is low, the raw materials are wasted, and the manufacturing cost is increased. However, based on the existing application technology in the industry, the traditional dehumidification dryer cannot thoroughly separate the adsorption dust and foreign matters existing in the raw materials from the factory, and the traditional dehumidification dryer must adopt long-time raw material drying (generally, optical materials at least need to be heated for more than 3 hours at a high temperature of 120 ℃) to degrade the physical properties of the raw materials of fine dust, so that the optical properties (yellowing due to oxidization) of products are affected, and the long-time heating and drying mode not only can damage the physical and chemical properties of the optical resin raw materials, but also can cause energy waste, which is a common consensus in the current lens injection molding processing enterprises, so far, no better solution exists.
The invention aims at the technical difficulties which are puzzled in the industry at present, adopts a drying treatment mode which is completely different from the traditional drying treatment mode, and solves all the problems of dust pollution and the industry problem of realizing rapid and non-oxidation drying of the optical resin. The popularization and application of the technology can realize an environment-friendly, efficient and energy-saving drying mode for enterprises, remarkably improves the qualification rate of processing the precise mobile phone lens, and has wide social and economic benefits.
Disclosure of Invention
Therefore, the embodiment of the invention provides a dust-free microwave vacuum drying device for an optical lens resin raw material, which aims to solve the related technical problems in the prior art.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
The dust-free microwave vacuum drying device for the optical lens resin raw material comprises a control cabinet, wherein a human-machine control interface is arranged on the control cabinet, and the dust-free microwave vacuum drying device further comprises a gas supply mechanism, a pressure regulating valve, a compressed air film separation dryer, a dry air storage tank, a raw material bin to be dried, an ultrasonic cleaning drying chamber, a feeding mechanism, a discharging mechanism, an anti-repeated suction hopper, a feed inlet valve, a discharge outlet valve, a metering feeding hopper, a level gauge, a cleaning water storage tank, a cleaning water pump, a cleaning water inlet valve, a cleaning water drain valve, an ultrasonic vibration generator, a microwave generator, a vacuum pump and a vacuum baffle valve;
the air outlet end of the air supply mechanism is connected with a pressure regulating valve, the pressure regulating valve is connected with the air inlet end of the compressed air membrane separation dryer, the air outlet end of the compressed air membrane separation dryer is connected with the air inlet end of the dry air storage tank, and the air outlet end of the dry air storage tank is connected with the feeding mechanism and the discharging mechanism;
The feeding end of the feeding mechanism is communicated with the lower end of a raw material bin to be dried, the discharging end of the feeding mechanism is connected with the feeding end of a metering feeding hopper, the discharging end of the metering feeding hopper is connected with an ultrasonic cleaning drying chamber, and a feeding port valve is arranged between the metering feeding hopper and the ultrasonic cleaning drying chamber;
The lower end of the ultrasonic cleaning drying chamber is connected with a discharge port valve, the discharge port valve is connected with the feeding end of the discharging mechanism, and the discharge end of the discharging mechanism is connected with an anti-repeated suction hopper;
the water outlet end of the cleaning water storage tank is connected with a cleaning water pump, the cleaning water pump is connected with a cleaning water inlet valve, the cleaning water inlet valve is connected with the ultrasonic cleaning drying chamber, and the lower end of the ultrasonic cleaning drying chamber is connected with a cleaning drain valve;
the vacuum pump is connected with the upper end of the ultrasonic cleaning drying chamber, and a vacuum baffle valve is arranged between the vacuum pump and the ultrasonic cleaning drying chamber;
the ultrasonic cleaning drying chamber is provided with a material level gauge, a cleaning water level gauge, an ultrasonic vibration generator and a microwave generator.
Further, the ultrasonic cleaning and drying device also comprises a nitrogen supply mechanism, wherein the nitrogen supply mechanism is arranged between the pressure regulating valve and the ultrasonic cleaning and drying chamber.
Further, the nitrogen gas supply mechanism comprises a nitrogen generator membrane group, a nitrogen gas storage tank and a nitrogen gas charging valve, wherein the air inlet end of the nitrogen generator membrane group is connected with a pressure regulating valve, the air outlet end of the nitrogen generator membrane group is connected with the nitrogen gas storage tank, the nitrogen gas storage tank is connected with the nitrogen gas charging valve, and the nitrogen gas charging valve is connected with the ultrasonic cleaning drying chamber.
Further, the air supply mechanism comprises a compressed air interface, a compressed air freeze dryer, an air impurity filter and an air oil filter, wherein the compressed air interface is connected with an air inlet end of the compressed air freeze dryer, an air outlet end of the compressed air freeze dryer is connected with an air inlet end of the air impurity filter, an air outlet end of the air impurity filter is connected with an air inlet end of the air oil filter, and an air outlet end of the air oil filter is connected with the pressure regulating valve.
Further, the feeding mechanism comprises a feeding air blowing valve and a feeding venturi device, one end of the feeding air blowing valve is connected with the air outlet end of the drying air storage tank, the other end of the feeding air blowing valve is connected with the feeding venturi device, the feeding end of the feeding venturi device is connected with the raw material bin to be dried, and the discharging end of the feeding venturi device is connected with the feeding end of the metering feeding hopper.
Further, the blanking mechanism comprises a blanking air blowing valve and a blanking venturi device, one end of the blanking air blowing valve is connected with the air outlet end of the dry air storage tank, the other end of the blanking air blowing valve is connected with the blanking venturi device, the feeding end of the blanking venturi device is connected with the discharging port valve, and the discharging end of the blanking venturi device is connected with the anti-repeated suction hopper.
Further, a stainless steel pipeline is arranged between the blanking venturi device and the anti-repetition suction hopper.
Further, the ultrasonic cleaning and drying device also comprises a liquid level limiting overflow valve, wherein the liquid level limiting overflow valve is arranged on the side wall of the ultrasonic cleaning and drying chamber.
Further, the water tank cleaning device further comprises a cleaning water return tank and a cleaning water filtering membrane, one end of the cleaning water return tank is connected with the cleaning drain valve and the liquid level limiting overflow valve, the other end of the cleaning water return tank is connected with one end of the cleaning water filtering membrane, and the other end of the cleaning water filtering membrane is connected with the cleaning water storage tank.
Further, the ultrasonic cleaning and drying device also comprises a thermocouple, wherein the thermocouple is arranged on the ultrasonic cleaning and drying chamber.
The embodiment of the invention has the following advantages:
1. The deionized purified water is used as cleaning liquid, and when the ultrasonic vibration generator works, dirt and superfine dust are directly peeled off from the surface of the raw material under the strong blasting impact of cavitation of high-pressure gas by utilizing tiny bubbles in the cleaning liquid, so that dust and impurities adhered and adsorbed on the surface of the raw material and in capillary holes are thoroughly removed, the problem that the superfine dust and impurities remain in dust separation by adopting ion wind blowing is avoided, and the dust and impurities are thoroughly cleaned.
2. The drying mode adopts microwave heating, the microwave heating belongs to a raw material static field heating mode of energy conversion between electromagnetic waves and raw material media, the hot air circulation (the circulation blowing inevitably causes pollution, the precise filter screen also has dust smaller than the filter screen, and the purity of resin raw materials is affected by much accumulation) pollution of the traditional dryer is avoided, and the microwave heating avoids the raw material pollution link during hot air heating.
3. The raw material is conveyed without adopting a conveying fan which can bring a pollution source, and the raw material is directly conveyed by using low dew point (-60 ℃) dry air or nitrogen after membrane separation treatment, so that the raw material is ensured not to be polluted, and the raw material is protected from re-absorbing water.
4. The cleaned dust and impurities flow back to the cleaning water tank along with the cleaning liquid in a unidirectional way, the impurities and the foreign matters are treated and filtered by the membrane separation water, and then the next cleaning use is repeated after the molecular level filtering precision is achieved, the cleaned dust and the cleaned pollutants remain in the cleaning water filtering membrane, and no dust is discharged outwards, so that the optical lens raw material reaches the highest-level clean degree in the current lens plastic resin raw material processing field.
5. The nitrogen introduced into the drying chamber after the drying process and the drying process are also drying gases which reach molecular level cleanliness after membrane separation treatment, and the raw materials in the whole drying link are in a closed space and are free from the interference of external environment. The drying process has no dust and pollutant discharged to the environment, only water vapor is discharged, and the environment requirements of thousands of purification workshops for lens processing are not influenced, so that the environment is friendly.
6. After cleaning, the cleaning liquid is emptied and rinsed for a plurality of times, after all the cleaning liquid is removed, microwave heating is directly started, as water molecules have extremely strong absorption capacity on microwave energy, the microwave energy is absorbed and rapidly heated, the gasification temperature can be reached at 40 ℃ under the condition of vacuum negative pressure and low boiling point, surface water and ionized water in the resin raw material are pumped out by a vacuum pump, 99.9% of low dew point dry nitrogen with purity is filled in the heating process, the water evaporated from the raw material can be accelerated and taken away, oxidation yellowing of the raw material can be prevented, after the drying temperature and the drying time period set by the process are reached, the drying process is finished, and the nitrogen is filled to the standard atmospheric pressure (101.3 KPa) to start to be supplied to an injection molding machine for processing. And (3) carrying out ultrasonic cleaning and non-oxidation (non-yellowing) drying to obtain a pure optical resin raw material product of the optical lens without dust and impurities.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the invention, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present invention, should fall within the ambit of the technical disclosure.
Fig. 1 is a schematic structural diagram of a dust-free microwave vacuum drying device for optical lens resin raw materials according to an embodiment of the present invention;
in the figure:
1, a control cabinet; 2a man-machine control interface; 3, a pressure regulating valve; 4, a compressed air membrane separation dryer; 5 a nitrogen generator membrane group; 6, drying the air storage tank; 7, a vacuum baffle valve; 8, a nitrogen storage tank; 9 nitrogen gas charging valve; 10a feed inlet valve; 11, metering and feeding hoppers; 12, ultrasonic cleaning the drying chamber; 13 level gauge; 14, cleaning the water level gauge; 15 thermocouples; 16, cleaning a water inlet valve; 17 preventing the re-sucking hopper; 18 raw material bin to be dried; 19a feeding air blowing valve; 20 a feeding venturi device; 21, blanking an air blowing valve; 22 an ultrasonic vibration generator; 23 discharge gate valve; 24 blanking venturi device; 25, cleaning a drain valve; 26 liquid level limiting overflow valve; 27, cleaning a water pump; 28 a microwave generator; 29 vacuum pump; 30, cleaning the water return tank; 31 washing the water filtration membrane; 32, cleaning the water storage tank; 33 an air oil filter; 34 an air impurity filter; 35 a compressed air freeze dryer; 36 compressed air interface.
Detailed Description
Other advantages and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order to solve the related technical problems in the prior art, the embodiment of the application provides a dust-free microwave vacuum drying device for optical lens resin raw materials, which is mainly used for dedusting and drying plastic optical resin injection molding raw material products for processing mobile phone optical lenses. The system comprises a control cabinet 1, wherein a human-machine control interface 2 is arranged on the control cabinet 1, and the control cabinet 1 integrally controls related components of the system. As shown in fig. 1, the device also comprises an air supply mechanism, a pressure regulating valve 3, a compressed air film separation dryer 4, a dry air storage tank 6, a raw material bin 18 to be dried, an ultrasonic cleaning drying chamber 12, a feeding mechanism, a discharging mechanism, an anti-repetition suction hopper 17, a feed inlet valve 10, a discharge outlet valve 23, a metering feeding hopper 11, a level gauge 13, a cleaning water level gauge 14, a cleaning water storage tank 32, a cleaning water pump 27, a cleaning water inlet valve 16, a cleaning water drain valve 25, an ultrasonic vibration generator 22, a microwave generator 28, a vacuum pump 29 and a vacuum baffle valve 7.
In this embodiment, the air supply mechanism provides clean and low dew point air to the dust-free microwave vacuum drying apparatus of the optical lens resin raw material. Specifically, the air supply mechanism is connected with the air-vent valve 3 at the end of giving vent to anger, the air-vent valve 3 is connected with the compressed air membrane separation desicator 4 inlet end, the compressed air membrane separation desicator 4 is connected with the dry air holding vessel 6 inlet end, the dry air holding vessel 6 is connected with feed mechanism and unloading mechanism at the end of giving vent to anger. In this embodiment, the air supply mechanism includes a compressed air interface 36, a compressed air lyophilizer 35, an air impurity filter 34, and an air oil filter 33. The front end of the compressed air interface 36 is connected with an air compressor (not shown in the figure), the compressed air interface 36 is connected with the air inlet end of the compressed air freeze dryer 35, compressed air is introduced into the compressed air freeze dryer 35, and further, the air outlet end of the compressed air freeze dryer 35 is connected with the air inlet end of the air impurity filter 34, the air outlet end of the air impurity filter 34 is connected with the air inlet end of the air oil filter 33, and the air outlet end of the air oil filter 33 is connected with the pressure regulating valve 3. Through the steps, the water content of the compressed air is reduced, impurities and oil in the compressed air are removed, and the purity of the air is improved. Therefore, the air pressure is regulated by the pressure regulating valve 3, and the air supply requirement is satisfied. The air further enters the compressed air film separation dryer 4 to be dried continuously, so that the water content of the compressed air is improved. The air after drying enters the drying air storage tank 6 for standby. The air in the dry air storage tank 6 provides power for the feeding mechanism and the discharging mechanism.
In this embodiment, the ultrasonic drying chamber is the main component for cleaning and drying the raw materials. Specifically, feed mechanism feed end intercommunication waits to dry former feed bin 18 lower extreme, the feed end of feed mechanism connects the feeding end of measurement feeding hopper 11, the ultrasonic cleaning drying chamber 12 is connected to measurement feeding hopper 11 discharge end, be equipped with feed inlet valve 10 between measurement feeding hopper 11 and the ultrasonic cleaning drying chamber 12. In this embodiment, the metering hopper 11 meters and controls the amount of each charge, and in this embodiment, the amount of each charge is controlled to be 1-5 kg for good cleaning and drying effects. Specifically, the feeding mechanism comprises a feeding air blowing valve 19 and a feeding venturi device 20, one end of the feeding air blowing valve 19 is connected with the air outlet end of the dry air storage tank 6, power is provided for feeding action through the feeding air blowing valve 19 in the dry air storage tank 6, the other end of the feeding air blowing valve 19 is connected with the feeding venturi device 20, the feeding end of the feeding venturi device 20 is connected with the raw material bin 18 to be dried, and the discharging end of the feeding venturi device 20 is connected with the feeding end of the metering feeding hopper 11. In this application, venturi is an abbreviation for venturi, and the principle of the venturi effect is that when wind blows across a barrier, the air pressure near the port above the lee side of the barrier is relatively low, thereby creating adsorption and causing air flow. The venturi tube is simple in principle, and it is to make the air flow become coarse to speed up the flow rate of air, so that the air forms a "vacuum" area at the back side of venturi tube outlet, and it can use air flow to implement powder material transportation. The same principle is also applicable to the blanking mechanism in the application.
Specifically, the lower extreme of ultrasonic cleaning drying chamber 12 is connected discharge gate valve 23, discharge gate valve 23 connects the feed end of unloading mechanism, the feed end of unloading mechanism connects and prevents that the repeated suction hopper 17. The anti-repetition suction hopper 17 is used for receiving the raw material products after dust removal and drying. In this application, the structure and the principle of unloading mechanism and feed mechanism are the same, and it specifically includes unloading gas valve 21 and unloading venturi device 24, unloading gas valve 21 one end is connected dry air holding vessel 6 gives vent to anger the end, unloading gas valve 21 other end is connected unloading venturi device 24, unloading venturi device 24 feed end is connected discharge gate valve 23, unloading venturi device 24 discharge end is connected prevent compound suction hopper 17. Meanwhile, a stainless steel pipeline is arranged between the blanking venturi device 24 and the anti-repetition suction hopper 17, and 304 stainless steel is preferably adopted.
The clean water storage tank 32 contains deionized purified water, so that the clean water is high in cleanliness and cannot cause new pollution. The water outlet end of the cleaning water storage tank 32 is connected with a cleaning water pump 27, the cleaning water pump 27 is connected with a cleaning water inlet valve 16, the cleaning water inlet valve 16 is connected with the ultrasonic cleaning drying chamber 12, and the lower end of the ultrasonic cleaning drying chamber 12 is connected with a cleaning water drain valve 25. Therefore, deionized water in the cleaning water storage tank 32 enters the ultrasonic cleaning drying chamber 12 through the cleaning water pump 27 and the water inlet valve, is used for cleaning raw materials in the ultrasonic cleaning drying chamber 12, and is discharged outwards through the cleaning water discharge valve 25 after cleaning is completed, and the deionized water is directly discharged or recycled.
In this embodiment, the ultrasonic cleaning and drying chamber 12 is provided with a level gauge 13, a cleaning water level gauge 14, an ultrasonic vibration generator 22 and a microwave generator 28. The charge level indicator 13 can monitor the charge amount, prevent excessive and ensure the dust removal and drying efficiency and effect; the cleaning water level gauge 14 can monitor the cleaning liquid amount entering the ultrasonic cleaning drying chamber 12, prevent excessive amount, and ensure the dust removal and drying efficiency and effect; the ultrasonic vibration generator 22 generates ultrasonic vibration, and dirt and superfine dust are directly peeled off from the surface of the raw material under the strong blasting impact of cavitation of high-pressure gas by utilizing micro bubbles in the cleaning liquid, so that dust and impurities adhered and adsorbed on the surface of the raw material and in capillary holes are thoroughly removed, the problem that the superfine dust and impurities remain in dust separation by adopting ion wind blowing is avoided, and the dust and impurities are more thoroughly cleaned; the microwave generator 28 can generate microwaves, the microwaves heat a static field heating mode of raw materials, which belongs to energy conversion between electromagnetic waves and raw material media, so that the pollution caused by hot air circulation (circulation blowing inevitably causes pollution, a precise filter screen also has dust smaller than the filter screen, and the purity of resin raw materials is affected by the dust), and the raw material pollution link during hot air heating is avoided by the microwave heating mode.
When the microwave generator 28 is used for heating the raw materials by microwaves, the ultrasonic cleaning and drying chamber 12 is vacuumized at the same time, so that the evaporation of water in the raw materials is accelerated. Specifically, the vacuum pump 29 is connected to the upper end of the ultrasonic cleaning and drying chamber 12, and a vacuum baffle valve 7 is disposed between the vacuum pump 29 and the ultrasonic cleaning and drying chamber 12. After the cleaning is finished, the cleaning liquid is emptied and rinsed for a plurality of times, after all the cleaning liquid is removed, the microwave heating is directly started, as the water molecules have extremely strong absorption capacity on microwave energy, the water molecules quickly heat after absorbing the microwave energy, the gasification temperature can be reached at 40 ℃ under the vacuum negative pressure low boiling point condition, and the surface water and ionized water in the resin raw material are pumped out through the vacuum pump 29.
In order to accelerate the evaporation of water in the raw material and protect the dried raw material, the problem of re-absorption of water is prevented. Further, a nitrogen gas supply mechanism is provided between the pressure regulating valve 3 and the ultrasonic cleaning and drying chamber 12. Specifically, the nitrogen supply mechanism includes a nitrogen generator membrane group 5, a nitrogen storage tank 8, and a nitrogen charging valve 9. The air inlet end of the nitrogen generator membrane group 5 is connected with the pressure regulating valve 3, the nitrogen generator membrane group 5 can produce nitrogen by using compressed air, and in the embodiment, the purity of the nitrogen generated by the nitrogen generator membrane group 5 is required to reach 99.9%, so that the use requirement is met. The nitrogen generator membrane group 5 is given vent to anger and is held and connect nitrogen gas holding vessel 8, and pure nitrogen gas stores up in nitrogen gas holding vessel 8, nitrogen gas holding vessel 8 connects nitrogen gas inflation valve 9, nitrogen gas inflation valve 9 connects ultrasonic cleaning drying chamber 12, consequently, can be when using, pure nitrogen gas lets in ultrasonic cleaning drying chamber 12 through nitrogen gas inflation valve 9.
Based on the structure, when the device is used, 99.9% of low dew point dry nitrogen with purity is filled in the microwave heating process, so that the water evaporated by the raw materials can be taken away quickly, the raw materials can be prevented from being oxidized and yellowing, and after the process set drying temperature and drying time period are reached, the drying process is finished, and the nitrogen is filled to the standard atmospheric pressure (101.3 KPa) to start to supply for the injection molding machine for processing. And (3) carrying out ultrasonic cleaning and non-oxidation (non-yellowing) drying to obtain a pure optical resin raw material product of the optical lens without dust and impurities.
Further, a liquid level limiting overflow valve 26 is further included, and the liquid level limiting overflow valve 26 is arranged on the side wall of the ultrasonic cleaning drying chamber 12. When the cleaning water level gauge 14 detects that the deionized water in the ultrasonic cleaning and drying chamber 12 is excessively added, the liquid level limiting overflow valve 26 can be opened, and the cleaning liquid can be discharged outwards through the liquid level limiting overflow valve 26, so that the liquid level of the ultrasonic cleaning and drying chamber 12 meets the use requirement. The discharged water can be directly discharged or reused.
In order to realize recycling of the cleaning liquid. Further, the water tank further comprises a cleaning water return tank 30 and a cleaning water filtering membrane 31, one end of the cleaning water return tank 30 is connected with the cleaning water drain valve 25 and the liquid level limiting overflow valve 26, the other end of the cleaning water return tank 30 is connected with one end of the cleaning water filtering membrane 31, and the other end of the cleaning water filtering membrane 31 is connected with the cleaning water storage tank 32. After the cleaning liquid discharged from the cleaning drain valve 25 and the liquid level limiting overflow valve 26 is temporarily stored in the cleaning water return tank 30, the cleaning liquid enters the cleaning water filtering membrane 31 equipment, is filtered and decontaminated, returns to the original state, and flows back to the cleaning water storage tank 32, so that the cleaning liquid is reused.
Further, a thermocouple 15 is further included, and the thermocouple 15 is disposed on the ultrasonic cleaning and drying chamber 12. The thermocouple 15 can monitor the temperature in the ultrasonic cleaning and drying chamber 12 in real time.
The application process of the embodiment of the invention is as follows:
All the components of the drying system are arranged inside the system structure installation and control cabinet 1. The drying process is set by the man-machine control interface 2. The PLC in the system structure installation and control cabinet 1 respectively controls and drives the linkage of all relevant components through a pre-programmed work flow.
The compressed air interface 36 is connected with the air inlet of the compressed air freeze dryer 35, the air outlet of the compressed air freeze dryer 35 is connected with the inlet of the air impurity filter 34, the outlet of the air impurity filter 34 is connected with the inlet of the air oil filter 33, the outlet of the air oil filter 33 is connected with the inlet of the pressure regulating valve 3, the outlet of the pressure regulating valve 3 is connected with the inlet of the compressed air membrane separation dryer 4 and the inlet of the nitrogen generator membrane group 5, the outlet of the compressed air membrane separation dryer 4 is connected with the inlet of the dry air storage tank 6, the outlet of the dry air storage tank 6 is connected with the inlet of the feeding air blowing valve 19 and the feeding air blowing valve 21, the outlet of the nitrogen generator membrane group 5 is connected with the inlet of the nitrogen storage tank 8, the outlet of the nitrogen storage tank 8 is connected with the inlet of the nitrogen charging valve 9, and the outlet of the nitrogen charging valve 9 is connected with the air inlet of the ultrasonic cleaning drying chamber 12 through a pipe.
The ultrasonic cleaning drying chamber 12 is connected with the air suction port of the vacuum baffle valve 7 through a vacuum pipeline, the air outlet of the vacuum baffle valve 7 is connected with the air suction port of the vacuum pump 29 through a vacuum pipeline, and the air outlet of the vacuum pump 29 is communicated with the atmosphere to directly discharge water vapor. The ultrasonic cleaning drying chamber 12 is connected with the waveguide outlet of the microwave generator 28 through a waveguide flange special for microwaves. The ultrasonic cleaning drying chamber 12 is connected with the material level gauge 13 through a quick-connection flange, the ultrasonic cleaning drying chamber 12 is connected with the cleaning water level gauge 14 through a quick-connection flange, the ultrasonic cleaning drying chamber 12 is connected with the thermocouple 15 through a quick-connection flange, and the ultrasonic cleaning drying chamber 12 is connected with the ultrasonic vibration generator 22 through pre-buried welding bolts. The ultrasonic cleaning drying chamber 12 is connected with an inlet of a discharge port valve 23 through a quick-connection flange. The outlet of the discharge outlet valve 23 is connected with the feed inlet of the discharging venturi device 24 through a quick-connection flange. The compressed air inlet of the blanking venturi device 24 is connected with the air outlet of the blanking air valve 21 through a quick-connection pipe joint. The discharge port of the discharging venturi device 24 is connected with the feed port of the anti-re-suction hopper 17 through a stainless steel pipeline. The discharge port of the anti-repeated suction hopper 17 is fixedly connected with the base of the feed inlet of the injection molding machine through a flange, and raw materials subjected to dust removal and drying can be directly supplied to the injection molding machine.
The ultrasonic cleaning drying chamber 12 feed inlet and feed inlet valve 10 discharge gate pass through quick connect flange joint, and feed inlet valve 10 import and measurement feeding hopper 11 discharge gate pass through quick connect flange joint, and measurement feeding hopper 11 feed inlet passes through stainless steel pipeline and connects and the material loading venturi device 20 discharge gate passes through quick connect flange and connects to be connected, and material loading venturi device 20 feed inlet and the former feed bin 18 discharge gate of waiting to dry pass through quick connect flange joint, and material loading venturi device 20 compressed air inlet passes through trachea and quick-operation joint with material loading blowoff valve 19 gas outlet. The water return port of the cleaning water storage tank 32 is connected with the water outlet of the cleaning water filtering membrane 31 through a pipeline, and the water inlet of the cleaning water filtering membrane 31 is connected with the water outlet of the cleaning water return tank 30 through a pipeline and a pipe fitting. The water inlet of the cleaning water return tank 30 is respectively connected with the water outlet of the cleaning drain valve 25 and the water outlet of the liquid level limiting overflow valve 26 through pipelines and pipe fittings, the water inlet of the liquid level limiting overflow valve 26 is connected with the overflow water outlet of the ultrasonic cleaning drying chamber 12 through pipelines and pipe fittings, the water inlet of the cleaning drain valve 25 is connected with the cleaning water outlet of the ultrasonic cleaning drying chamber 12 through pipelines and pipe fittings, and the water outlet of the cleaning water storage tank 32 is connected with the water inlet of the cleaning water pump 27 through pipelines and pipe fittings. The water outlet of the cleaning water pump 27 is connected with the water inlet of the cleaning water inlet valve 16 through a pipeline and a pipe fitting, and the cleaning water inlet valve 16 is connected with the cleaning water inlet of the ultrasonic cleaning drying chamber 12 through a pipeline and a pipe fitting.
Opening a feeding air blowing valve 19 connected with the dry air storage tank 6, blowing in dry compressed air through an air inlet of a feeding venturi device 20, and conveying 1-5 kg of raw materials which are preset in each time to a metering feeding hopper 11 through a stainless steel feeding pipeline from a discharge port of a raw material bin 18 to be dried through a discharge port of the feeding venturi device 20; opening a feed inlet valve 10 connected with a metering feeding hopper 11 and an ultrasonic cleaning drying chamber 12, enabling raw materials to be cleaned and dried to fall into the ultrasonic cleaning drying chamber 12, and closing the feed inlet valve 10 when the raw materials reach the maximum allowable material level by contacting a material level meter; the cleaning water inlet valve 16, the liquid level limiting overflow valve 26 and the cleaning water pump 27 are opened, cleaning liquid is conveyed from the cleaning water storage tank 32 into the ultrasonic cleaning drying chamber 12 through a pipeline connected with the ultrasonic cleaning drying chamber 12, and the cleaning water inlet valve 16, the liquid level limiting overflow valve 26 and the cleaning water pump 27 are closed when the cleaning water level gauge 14 reaches the set position; starting an ultrasonic vibration generator 22, enabling raw materials to act on the raw materials together through the ultrasonic vibration generator 22 and deionized purified water to carry out ultrasonic cleaning, ending the cleaning process when the set cleaning time is reached, and closing the ultrasonic vibration generator 22; opening the cleaning water drain valve 25, allowing the cleaning liquid and the cleaned dust impurities to flow back to the cleaning water return tank 30 through the cleaning water drain valve 25, and closing the cleaning water drain valve 25; starting a microwave generator 28, starting a vacuum pump 29, and connecting a vacuum baffle valve 7 and a nitrogen charging valve 9 of the ultrasonic cleaning drying chamber 12, performing microwave heating and drying according to the vacuum degree, the temperature and the time set by a program, and automatically tracking and setting the drying temperature, the vacuum degree and the time by an electric control program to control; after the drying is finished, the nitrogen charging valve 9 is opened to charge dry nitrogen to the standard atmospheric pressure (101.3 KPa), the discharge port valve 23 is opened, the blanking air blowing valve 21 connected with the dry air storage tank 6 is opened, the dried optical resin raw material is conveyed to the anti-re-suction hopper 17 through a 304 stainless steel pipeline through the air blowing discharge port of the blanking venturi device 24, and the material is fixedly connected with the injection molding machine base feed port through the discharge port of the anti-re-suction hopper 17 to supply the injection molding machine processing material, and the whole drying process is finished. The next raw material drying process repeats the steps and processes described above.
In the technical process, the raw materials are conveyed by directly using low dew point (-60 ℃) dry air or nitrogen after membrane separation treatment without adopting a conveying fan which can bring pollution sources, so that the raw materials are ensured not to be polluted, and the effect of protecting the raw materials from re-absorbing water is also achieved.
The cleaned dust and impurities flow back to the cleaning water tank along with the cleaning liquid in a unidirectional way, the impurities and the foreign matters are treated and filtered by the membrane separation water, and then the next cleaning use is repeated after the molecular level filtering precision is achieved, the cleaned dust and the cleaned pollutants remain in the cleaning water filtering membrane, and no dust is discharged outwards, so that the optical lens raw material reaches the highest-level clean degree in the current lens plastic resin raw material processing field.
The nitrogen introduced into the drying chamber after the drying process and the drying process are also drying gases which reach molecular level cleanliness after membrane separation treatment, and the raw materials in the whole drying link are in a closed space and are free from the interference of external environment. The drying process has no dust and pollutant discharged to the environment, only water vapor is discharged, and the environment requirements of thousands of purification workshops for lens processing are not influenced, so that the environment is friendly.
The microwave heating mode has no dust pollution to raw materials, and has high heating speed, the traditional hot air drying period can be shortened to less than 1 hour from a few hours, the energy consumption is saved, the efficiency is high, the saved drying time in a few hours can be directly used for production, more multivalent values are created, and the utilization rate of the injection molding machine is improved.
The invention is mainly characterized in that by thoroughly solving all links of the whole process from the source to the user terminal, which can pollute raw materials, the pollution of the packaging process before the raw materials leave the factory, the pollution of the drying process, the secondary pollution of the conveying link, no dust discharge in the working process and no dust pollution to the thousand-level purifying and processing environment are avoided, and the purity degree of the dried raw materials can be kept to exceed that of the raw materials leaving the factory. The drying mode before processing the optical resin raw material fills the domestic blank, provides a brand-new drying processing method for the optical grade resin raw material, and thoroughly solves the industrial problem of insufficient product percent of pass caused by raw material pollution.
While the invention has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
Claims (7)
1. The dust-free microwave vacuum drying device for the optical lens resin raw material comprises a control cabinet, wherein a man-machine control interface is arranged on the control cabinet, and is characterized by further comprising an air supply mechanism, a pressure regulating valve, a compressed air film separation dryer, a dry air storage tank, a raw material bin to be dried, an ultrasonic cleaning drying chamber, a feeding mechanism, a discharging mechanism, an anti-repeated suction hopper, a feed inlet valve, a discharge outlet valve, a metering feeding hopper, a material level gauge, a cleaning water storage tank, a cleaning water pump, a cleaning water inlet valve, a cleaning water drain valve, an ultrasonic vibration generator, a microwave generator, a vacuum pump and a vacuum baffle valve;
the air outlet end of the air supply mechanism is connected with a pressure regulating valve, the pressure regulating valve is connected with the air inlet end of the compressed air membrane separation dryer, the air outlet end of the compressed air membrane separation dryer is connected with the air inlet end of the dry air storage tank, and the air outlet end of the dry air storage tank is connected with the feeding mechanism and the discharging mechanism;
The feeding end of the feeding mechanism is communicated with the lower end of a raw material bin to be dried, the discharging end of the feeding mechanism is connected with the feeding end of a metering feeding hopper, the discharging end of the metering feeding hopper is connected with an ultrasonic cleaning drying chamber, and a feeding port valve is arranged between the metering feeding hopper and the ultrasonic cleaning drying chamber;
The lower end of the ultrasonic cleaning drying chamber is connected with a discharge port valve, the discharge port valve is connected with the feeding end of the discharging mechanism, and the discharge end of the discharging mechanism is connected with an anti-repeated suction hopper;
the water outlet end of the cleaning water storage tank is connected with a cleaning water pump, the cleaning water pump is connected with a cleaning water inlet valve, the cleaning water inlet valve is connected with the ultrasonic cleaning drying chamber, and the lower end of the ultrasonic cleaning drying chamber is connected with a cleaning drain valve;
the vacuum pump is connected with the upper end of the ultrasonic cleaning drying chamber, and a vacuum baffle valve is arranged between the vacuum pump and the ultrasonic cleaning drying chamber;
the ultrasonic cleaning drying chamber is provided with a material level gauge, a cleaning water level gauge, an ultrasonic vibration generator and a microwave generator;
The discharging mechanism comprises a discharging air blowing valve and a discharging venturi device, one end of the discharging air blowing valve is connected with the air outlet end of the dry air storage tank, the other end of the discharging air blowing valve is connected with the discharging venturi device, the feeding end of the discharging venturi device is connected with the discharging outlet valve, and the discharging end of the discharging venturi device is connected with the anti-recovery suction hopper;
a stainless steel pipeline is arranged between the blanking venturi device and the anti-repetition suction hopper;
The air supply mechanism comprises a compressed air interface, a compressed air freeze dryer, an air impurity filter and an air oil filter, wherein the compressed air interface is connected with an air inlet end of the compressed air freeze dryer, an air outlet end of the compressed air freeze dryer is connected with an air inlet end of the air impurity filter, an air outlet end of the air impurity filter is connected with an air inlet end of the air oil filter, and an air outlet end of the air oil filter is connected with the pressure regulating valve.
2. The dust-free microwave vacuum drying apparatus for optical lens resin raw material according to claim 1, further comprising a nitrogen gas supply mechanism provided between the pressure regulating valve and the ultrasonic cleaning drying chamber.
3. The dust-free microwave vacuum drying device for optical lens resin raw materials according to claim 2, wherein the nitrogen supply mechanism comprises a nitrogen generator membrane group, a nitrogen storage tank and a nitrogen charging valve, wherein an air inlet end of the nitrogen generator membrane group is connected with a pressure regulating valve, an air outlet end of the nitrogen generator membrane group is connected with the nitrogen storage tank, the nitrogen storage tank is connected with the nitrogen charging valve, and the nitrogen charging valve is connected with the ultrasonic cleaning drying chamber.
4. The dust-free microwave vacuum drying device for optical lens resin raw materials according to claim 1, wherein the feeding mechanism comprises a feeding air blowing valve and a feeding venturi device, one end of the feeding air blowing valve is connected with an air outlet end of the drying air storage tank, the other end of the feeding air blowing valve is connected with the feeding venturi device, a feeding end of the feeding venturi device is connected with the raw material bin to be dried, and a discharging end of the feeding venturi device is connected with a feeding end of the metering feeding hopper.
5. The dust-free microwave vacuum drying apparatus for optical lens resin raw material according to claim 1 or 2, further comprising a liquid level limiting overflow valve provided on a side wall of the ultrasonic cleaning drying chamber.
6. The dust-free microwave vacuum drying apparatus for optical lens resin raw materials according to claim 5, further comprising a cleaning water return tank and a cleaning water filtering membrane, wherein one end of the cleaning water return tank is connected with the cleaning drain valve and the liquid level limiting overflow valve, the other end of the cleaning water return tank is connected with one end of the cleaning water filtering membrane, and the other end of the cleaning water filtering membrane is connected with the cleaning water storage tank.
7. The dust-free microwave vacuum drying apparatus for optical lens resin raw material according to claim 1, further comprising a thermocouple provided on the ultrasonic cleaning drying chamber.
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| CN211451570U (en) * | 2020-01-02 | 2020-09-08 | 天津莱沃真空干燥设备制造有限公司 | Dust-free microwave vacuum drying device for optical lens resin raw material |
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| CN1729377A (en) * | 2002-12-20 | 2006-02-01 | 株式会社松井制作所 | Drying-storing apparatus for powder material and feeding system for powder material |
| CN104501533A (en) * | 2014-12-11 | 2015-04-08 | 南京工业大学 | Powder drying system and method based on membrane method dust collection technology |
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