阅读说明：本技术 一种光学透镜树脂原料的无尘微波真空干燥装置 (Dust-free microwave vacuum drying device for optical lens resin raw material ) 是由 李惠峰 常晓宇 刘健 刘嘉平 于 2020-01-02 设计创作，主要内容包括：本发明实施例公开了一种光学透镜树脂原料的无尘微波真空干燥装置,包括控制柜,供气机构出气端连接调压阀,调压阀连接压缩空气膜分离干燥器进气端,压缩空气膜分离干燥器出气端连接干燥空气储存罐进气端,干燥空气储存罐出气端连接上料机构和下料机构；上料机构应用文氏管的原理将待除尘和干燥的原料送入到超声波清洗干燥室,下料机构应用文氏管的原理将除尘和干燥后的原料送入防复吸出料斗；通过去离子水清洗液和超声震动发生器对原料进行清洗,在干燥时同时开启真空泵和微波发生器,加速原料干燥,并在干燥后向超声波清洗干燥室内充氮气,防止原料复吸水分和氧化变黄。原料清洗彻底,干燥速度快和效果好,没有引入新的污染。(The embodiment of the invention discloses a dust-free microwave vacuum drying device for an optical lens resin raw material, 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 membrane separation dryer, the air outlet end of the compressed air membrane 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 sends the raw materials to be dedusted and dried into the ultrasonic cleaning and drying chamber by using the venturi principle, and the discharging mechanism sends the dedusted and dried raw materials into the re-absorption preventing discharging hopper by using the venturi principle; the raw materials are cleaned by the deionized water cleaning liquid and the ultrasonic vibration generator, the vacuum pump and the microwave generator are started simultaneously during drying, the raw materials are dried in an accelerated mode, and nitrogen is filled into the ultrasonic cleaning drying chamber after drying, so that the raw materials are prevented from absorbing moisture again and being oxidized to be yellow. The raw materials are thoroughly cleaned, the drying speed is high, the effect is good, and no new pollution is introduced.)

1. A dust-free microwave vacuum drying device for an optical lens resin raw material comprises a control cabinet, wherein a human-computer control interface is arranged on the control cabinet, and the dust-free microwave vacuum drying device is characterized by further comprising an air supply mechanism, a pressure regulating valve, a compressed air membrane separation dryer, a dry air storage tank, a raw material cabin to be dried, an ultrasonic cleaning and drying chamber, a feeding mechanism, a blanking mechanism, a re-suction prevention discharge hopper, a feed inlet valve, a discharge outlet valve, a metering feed hopper, a material level meter, a cleaning water storage tank, a cleaning water pump, a cleaning water inlet valve, a cleaning water discharge valve, an ultrasonic vibration generator, a microwave generator, a vacuum pump and a vacuum baffle;

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 blanking 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 feed end of a blanking mechanism, and the discharge end of the blanking mechanism is connected with a re-absorption prevention discharge 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;

and a material level meter, a cleaning water level meter, an ultrasonic vibration generator and a microwave generator are arranged on the ultrasonic cleaning drying chamber.

2. A dust-free microwave vacuum drying apparatus for an optical lens resin material as claimed in claim 1, further comprising a nitrogen gas supply mechanism provided between said pressure regulating valve and said ultrasonic cleaning and drying chamber.

3. The apparatus for dust-free microwave vacuum drying of optical lens resin raw material according to claim 2, wherein the nitrogen gas supply mechanism comprises a nitrogen gas generator membrane set, a nitrogen gas storage tank and a nitrogen gas charging valve, wherein the inlet end of the nitrogen gas generator membrane set is connected with the pressure regulating valve, the outlet end of the nitrogen gas generator membrane set 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 and drying chamber.

4. The apparatus for dust-free microwave vacuum drying of optical lens resin raw material according to claim 1, wherein the air supply mechanism comprises a compressed air interface, a compressed air freeze dryer, an air impurity filter and an air oil filter, the compressed air interface is connected to an air inlet end of the compressed air freeze dryer, an air outlet end of the compressed air freeze dryer is connected to an air inlet end of the air impurity filter, an air outlet end of the air impurity filter is connected to an air inlet end of the air oil filter, and an air outlet end of the air oil filter is connected to the pressure regulating valve.

5. The apparatus for dust-free microwave vacuum drying of optical lens resin raw material 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 to the air outlet end of the drying air storage tank, the other end of the feeding air blowing valve is connected to the feeding venturi device, the feeding end of the feeding venturi device is connected to the raw material bin to be dried, and the discharging end of the feeding venturi device is connected to the feeding end of the metering hopper.

6. The apparatus of claim 1, wherein the unloading mechanism comprises an unloading air blowing valve and an unloading venturi device, one end of the unloading air blowing valve is connected to an air outlet end of the dry air storage tank, the other end of the unloading air blowing valve is connected to the unloading venturi device, a feeding end of the unloading venturi device is connected to the outlet valve, and a discharging end of the unloading venturi device is connected to the anti-suck-back hopper.

7. A dust-free microwave vacuum drying apparatus for an optical lens resin raw material as claimed in claim 6, wherein a stainless pipe is provided between the discharge Venturi device and the re-suction prevention discharge hopper.

8. A dust-free microwave vacuum drying apparatus for an optical lens resin material according to claim 1 or 2, further comprising a liquid level limiting relief valve provided on a side wall of the ultrasonic cleaning/drying chamber.

9. A dust-free microwave vacuum drying apparatus for an optical lens resin raw material according to claim 8, further comprising a cleaning water returning tank and a cleaning water filtering membrane, wherein one end of the cleaning water returning tank is connected to the cleaning water drain valve and the liquid level limiting overflow valve, the other end of the cleaning water returning tank is connected to one end of the cleaning water filtering membrane, and the other end of the cleaning water filtering membrane is connected to the cleaning water storage tank.

10. A dust-free microwave vacuum drying apparatus for an optical lens resin raw material according to claim 1, further comprising a thermocouple provided on the ultrasonic cleaning and drying chamber.

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 processing of a mobile phone optical lens product, optical resin raw materials are fully dried firstly, a traditional dryer is used for drying for more than 3 hours at the temperature of 105-120 ℃ by adopting a circulating heating mode of blowing hot air in a drying barrel and absorbing moisture by a molecular sieve, good equipment can be protected by nitrogen, and the problem that the product cannot meet the light distribution requirement due to the fact that the plastic resin raw materials are hydrolyzed at high temperature (250-280 ℃) during injection molding processing of the water in the raw materials is solved. In addition, factories for processing mobile phone lenses all require that under the production environment condition of thousand-level cleanliness, the traditional drying machine discharges dust to the workshop environment due to the existence of hot air circulation and molecular sieve regeneration factors, the working principle is far beyond the requirement of thousand-level purification workshops, the operation guarantee difficulty of a purification system is increased invisibly, the requirement is also an important factor for reducing the product qualification rate, and a better drying mode is not found for solving the problem at present.

In addition, traditional dehumidification desiccator is in the drying process, because the wearing and tearing of fan motion spare part when blowing heated air circulation heating can bring powder and impurity into for the raw materials certainly, in the dust impurity that just increases filter screen density also can be less than filter fineness gets into the raw materials, these impurity class foreign matter adsorbs can directly lead to moulding plastics to add in the raw materials and add and to bring into the product from the raw materials itself in man-hour, lead to many high-demand optical technical index to descend and cause the camera lens product of processing to scrap. The biggest quality defect of the traditional dehumidifying dryer is that dust in raw materials cannot be thoroughly removed.

Moreover, in the process of raw material delivery and packaging, 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 caused, the yield is low, raw materials are wasted, and the manufacturing cost is increased. However, based on the existing application technology in the industry, the traditional dehumidifying dryer cannot completely separate the adsorbed dust and foreign matters existing when the raw materials leave the factory, and in addition, the traditional dehumidifying dryer must adopt long-time raw material drying (generally, optical materials need to be heated at a high temperature of 120 ℃ for more than 3 hours) to degrade the physical properties of the raw materials of fine dust, so that the optical properties (oxidation yellowing) of products are influenced, the physical and chemical properties of the raw materials of optical resins can be damaged by a long-time heating and drying mode, and energy waste is also caused, so that the traditional dehumidifying dryer is a common consensus in the current lens injection molding enterprises, and no better solution is provided so far.

Aiming at the technical difficulties which are puzzled by the industry at present, the invention adopts a drying treatment mode completely different from the traditional drying treatment mode, and solves all the industrial problems of dust pollution and realization of rapid non-oxidation drying of optical resin. By popularizing and applying the technology, an environment-friendly, efficient and energy-saving drying mode of an enterprise can be realized, the qualification rate of processing the precise mobile phone lens is remarkably improved, and the technology has wide social benefits 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 embodiments of the present invention provide the following technical solutions:

a dust-free microwave vacuum drying device for an optical lens resin raw material comprises a control cabinet, wherein a human-computer control interface is arranged on the control cabinet, and the dust-free microwave vacuum drying device also comprises an air supply mechanism, a pressure regulating valve, a compressed air membrane separation dryer, a dry air storage tank, a raw material bin to be dried, an ultrasonic cleaning and drying chamber, a feeding mechanism, a blanking mechanism, a re-absorption preventing discharge hopper, a feeding port valve, a discharging port valve, a metering feeding hopper, a material level meter, 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;

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 blanking 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 feed end of a blanking mechanism, and the discharge end of the blanking mechanism is connected with a re-absorption prevention discharge 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;

and a material level meter, a cleaning water level meter, an ultrasonic vibration generator and a microwave generator are arranged on the ultrasonic cleaning drying chamber.

The ultrasonic cleaning and drying device further 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, nitrogen gas feed mechanism includes nitrogen generator membrane group, nitrogen gas holding vessel and nitrogen gas inflation valve, the air-vent valve is connected to nitrogen generator membrane group inlet end, the nitrogen gas holding vessel is connected to the nitrogen generator membrane group outlet end, the nitrogen gas holding vessel is connected the nitrogen gas inflation valve, the nitrogen gas inflation valve is connected the ultrasonic cleaning drying chamber.

Further, air feed mechanism includes compressed air interface, compressed air freeze dryer, air impurity filter and air oil filter, compressed air interface connection compressed air freeze dryer inlet end, compressed air freeze dryer gives vent to anger the end and connects air impurity filter inlet end, air impurity filter gives vent to anger the end and connects air oil filter inlet end, air oil filter gives vent to anger the end and connects the air-vent valve.

Furthermore, the feeding mechanism comprises a feeding air blowing valve and a feeding venturi tube device, one end of the feeding air blowing valve is connected with the air outlet end of the dry air storage tank, the other end of the feeding air blowing valve is connected with the feeding venturi tube device, the feeding end of the feeding venturi tube device is connected with the raw material bin to be dried, and the discharging end of the feeding venturi tube device is connected with the feeding end of the metering feeding hopper.

Furthermore, the blanking mechanism comprises a blanking air blowing valve and a blanking venturi tube 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 tube device, the feeding end of the blanking venturi tube device is connected with the discharge port valve, and the discharge end of the blanking venturi tube device is connected with the re-suction prevention discharge hopper.

Further, a stainless steel pipeline is arranged between the blanking venturi tube device and the re-absorption prevention discharge hopper.

Further, the ultrasonic cleaning drying chamber further comprises a liquid level limiting overflow valve, and the liquid level limiting overflow valve is arranged on the side wall of the ultrasonic cleaning drying chamber.

The washing water storage tank is characterized by further comprising a washing water return tank and a washing water filtering membrane, one end of the washing water return tank is connected with the washing water drain valve and the liquid level limiting overflow valve, the other end of the washing water return tank is connected with one end of the washing water filtering membrane, and the other end of the washing water filtering membrane is connected with the washing water storage tank.

Further, the ultrasonic cleaning drying chamber also comprises a thermocouple, and the thermocouple is arranged on the ultrasonic cleaning drying chamber.

The embodiment of the invention has the following advantages:

1. the deionized purified water is adopted as cleaning liquid, when the ultrasonic vibration generator works, the tiny bubbles in the cleaning liquid are utilized to directly peel off dirt and ultrafine dust from the surface of the raw material under the strong blasting impact of the high-pressure gas cavitation effect, the dust and impurities adhered and adsorbed on the surface of the raw material and in capillary holes are thoroughly removed, the problem that the fine dust and the impurities are remained in the dust separation process by adopting the ion wind blowing is avoided, and the dust and the impurities are cleaned more thoroughly.

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 a raw material medium, hot air circulation (pollution is inevitably brought by circular blowing, dust smaller than a filter screen is also generated in a precise filter screen, and the purity of a resin raw material is influenced by the accumulated dust), and the raw material pollution link during hot air heating is avoided by the microwave heating mode.

3. The raw material is 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 material is ensured not to be polluted, and the effect of protecting the raw material from reabsorbing moisture is also achieved.

4. The cleaned dust and impurities flow back to the cleaning water return tank along with the cleaning liquid in a one-way mode, the impurities and the foreign matters are subjected to membrane separation water treatment and filtration, the cleaning is repeated for the next time after the molecular level filtering precision is achieved, the cleaned dust and pollutants are remained in the cleaning water filtering membrane, no dust is discharged outwards, and the optical lens raw material reaches the highest level of cleanliness in the field of processing of the existing lens plastic resin raw material.

5. The nitrogen introduced into the drying chamber during and after the drying process is dry gas which reaches 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 interference of external environment. No dust and pollutants are discharged to the environment in the drying process, only water vapor is discharged, the environment requirements of a thousand-level purification workshop for processing the lens are not influenced, and the method is environment-friendly.

6. After cleaning, emptying cleaning liquid and rinsing for multiple times, directly starting microwave heating after all the cleaning liquid is drained, absorbing microwave energy by water molecules and then quickly heating, wherein the microwave energy is absorbed by the water molecules, the gasification temperature can be reached at 40 ℃ under the vacuum negative pressure low boiling point condition, surface water and ionized water in the resin raw material are pumped out by a vacuum pump, 99.9% purity low dew point dry nitrogen is filled in the heating process, so that water evaporated from the raw material can be taken away in an accelerated manner, the raw material can be prevented from being oxidized and yellowed, after the drying temperature and the drying time period set by the process are reached, the drying process is finished, and the injection molding machine can be started to process by filling the nitrogen to the standard atmospheric pressure (101.3 KPa). 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 should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.

FIG. 1 is a schematic structural diagram of a dust-free microwave vacuum drying apparatus for resin raw materials of optical lenses according to an embodiment of the present invention;

in the figure:

1, a control cabinet; 2, a human-computer control interface; 3 pressure regulating valve; 4, a compressed air membrane separation dryer; 5, a nitrogen generator membrane group; 6, a dry air storage tank; 7 vacuum flapper valves; 8, a nitrogen storage tank; 9, a nitrogen charging valve; 10 a feed inlet valve; 11, weighing a feeding hopper; 12, cleaning a drying chamber by ultrasonic waves; 13 a level gauge; 14 cleaning the water level gauge; 15 a thermocouple; 16 cleaning the water inlet valve; 17 discharge hopper for preventing re-absorption; 18 a raw material bin to be dried; 19 a feeding air blowing valve; 20 feeding a venturi device; 21 blanking air blowing valve; 22 an ultrasonic vibration generator; 23 discharge port valve; 24 a blanking venturi device; 25, cleaning a drain valve; 26 liquid level limiting overflow valves; 27 washing the water pump; 28 a microwave generator; 29 a vacuum pump; 30, washing the water return tank; 31 washing the water filtering membrane; 32 cleaning the water storage tank; 33 an air-oil filter; 34 an air impurity filter; 35 compressed air freeze dryer; 36 compressed air interface.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present 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 an optical lens resin raw material, which is mainly used for removing dust 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-computer control interface 2 is arranged on the control cabinet 1, and the control cabinet 1 is used for integrally controlling related components of the system. As shown in fig. 1, the drying device further comprises an air supply mechanism, a pressure regulating valve 3, a compressed air membrane separation dryer 4, a dry air storage tank 6, a raw material bin 18 to be dried, an ultrasonic cleaning and drying chamber 12, a feeding mechanism, a blanking mechanism, a re-absorption preventing discharge hopper 17, a feeding port valve 10, a discharging port valve 23, a metering feeding hopper 11, a material 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 discharge valve 25, an ultrasonic vibration generator 22, a microwave generator 28, a vacuum pump 29 and a vacuum baffle valve 7.

In this example, the air supply mechanism supplies clean and low dew point air to the dust-free microwave vacuum drying apparatus for the optical lens resin material. Specifically, the air outlet end of the air supply mechanism is connected with a pressure regulating valve 3, the pressure regulating valve 3 is connected with the air inlet end of a compressed air membrane separation dryer 4, the air outlet end of the compressed air membrane separation dryer 4 is connected with the air inlet end of a dry air storage tank 6, and the air outlet end of the dry air storage tank 6 is connected with an upper feeding mechanism and a lower feeding mechanism. In this embodiment, the air supply mechanism includes a compressed air interface 36, a compressed air freeze dryer 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, 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 air purity is improved. Therefore, the air pressure is adjusted by the pressure adjusting valve 3, and the air supply requirement is met. The air further enters the compressed air membrane separation dryer 4 to be dried continuously, and the water content of the compressed air is improved. The air dried by the drying is introduced into the dry air storage tank 6 for standby. The air in the dry air storage tank 6 provides power for the feeding mechanism and the blanking mechanism.

In this embodiment, the ultrasonic drying chamber is the main component for cleaning and drying the raw material. Specifically, 18 lower extremes in dry raw materials storehouse are treated in feed mechanism feed end intercommunication, 11 feed ends in the measurement feeding funnel are connected to the feed mechanism discharge end, ultrasonic cleaning drying chamber 12 is connected to 11 discharge ends in the measurement feeding funnel, be equipped with feed inlet valve 10 between 11 in the measurement feeding funnel and the ultrasonic cleaning drying chamber 12. In this embodiment, the metering hopper 11 meters and controls the amount of each feed, and in this embodiment, the amount of each feed is controlled to be 1-5 kg for good cleaning and drying. Specifically, the feeding mechanism comprises a feeding air blowing valve 19 and a feeding venturi tube device 20, one end of the feeding air blowing valve 19 is connected with an air outlet end of the dry air storage tank 6, power is provided for feeding 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 tube device 20, a feeding end of the feeding venturi tube device 20 is connected with the raw material bin 18 to be dried, and a discharging end of the feeding venturi tube device 20 is connected with a feeding end of the metering feeding hopper 11. In this application, venturi is a short term venturi, and the principle of venturi effect is that when wind blows across an obstacle, the air pressure is relatively low near the port above the lee side of the obstacle, thereby creating adsorption and causing air to flow. The venturi principle is simple, and it is to make the air flow from thick to thin to speed up the air flow rate, so that the air forms a "vacuum" zone at the back side of the venturi outlet, which can transport the powder by the air flow. The same principle applies to the blanking mechanism in this application.

Specifically, the lower end of the ultrasonic cleaning and drying chamber 12 is connected with a discharge port valve 23, the discharge port valve 23 is connected with the feeding end of the blanking mechanism, and the discharge end of the blanking mechanism is connected with the re-absorption prevention discharge hopper 17. The anti-re-absorption discharge hopper 17 is used for receiving raw material products after dust removal and drying. In this application, unloading mechanism is the same with feed mechanism's structure and principle, and it specifically includes unloading blow valve 21 and unloading venturi tube device 24, unloading blow valve 21 one end is connected dry air holding vessel 6 end of giving vent to anger, unloading blow valve 21 other end is connected unloading venturi tube device 24, unloading venturi tube device 24 feed end is connected discharge gate valve 23, 24 discharge ends of unloading venturi tube device are connected prevent resorption hopper 17. Meanwhile, a stainless steel pipeline is arranged between the blanking venturi tube device 24 and the re-absorption prevention discharge hopper 17, and is preferably made of 304 stainless steel.

Deionized purified water is contained in the cleaning water storage tank 32, so that the cleanliness is high and no new pollution is caused. 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 discharge valve 25. Therefore, the deionized water in the cleaning water storage tank 32 enters the ultrasonic cleaning and drying chamber 12 through the cleaning water pump 27 and the water inlet valve, is used for cleaning the raw materials in the ultrasonic cleaning and drying chamber 12, is discharged outwards through the cleaning water discharge valve 25 after the cleaning is finished, and 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 material level meter 13 can monitor the feeding amount, prevent excess and ensure the efficiency and effect of dust removal and drying; the cleaning water level meter 14 can monitor the amount of the cleaning liquid entering the ultrasonic cleaning and drying chamber 12, prevent excess and ensure the efficiency and effect of dust removal and drying; the ultrasonic vibration generator 22 generates ultrasonic vibration, dirt and ultrafine dust are directly stripped from the surface of the raw material by utilizing the strong blasting impact of the cavitation action of high-pressure gas of the tiny bubbles in the cleaning solution, and the dust and impurities adhered and adsorbed on the surface of the raw material and in the capillary holes are thoroughly removed, so that the problem of residual ultrafine dust and impurities 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 raw materials in a static field heating mode of energy conversion between electromagnetic waves and raw material media, hot air circulation (pollution is inevitably brought by circular blowing, dust smaller than a filter screen is generated in a precise filter screen, and the purity of resin raw materials is influenced by the dust when the dust is accumulated in the filter screen) pollution of a traditional dryer is avoided, and a raw material pollution link during hot air heating is avoided by the microwave heating mode.

When the microwave generator 28 is used to heat the raw material with microwaves, the ultrasonic cleaning and drying chamber 12 is simultaneously evacuated to accelerate the evaporation of moisture in the raw material. 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 arranged between the vacuum pump 29 and the ultrasonic cleaning and drying chamber 12. After cleaning, emptying the cleaning solution and rinsing for multiple times, directly starting microwave heating after all the cleaning solution is drained, rapidly heating after microwave energy is absorbed due to the extremely strong absorption capacity of water molecules to the microwave energy, reaching the gasification temperature at 40 ℃ under the vacuum negative pressure low boiling point condition, and pumping out surface water and ionized water in the resin raw material through a vacuum pump 29.

In order to accelerate the evaporation of water in the raw materials and protect the dried raw materials, the problem of reabsorbing water is prevented. Further, the ultrasonic cleaning and drying device further comprises a nitrogen supply mechanism which is arranged between the pressure regulating valve 3 and the ultrasonic cleaning and drying chamber 12. Specifically, the nitrogen gas supply mechanism includes a nitrogen gas generator membrane group 5, a nitrogen gas storage tank 8 and a nitrogen gas charging valve 9. The inlet end of the nitrogen generator membrane group 5 is connected with the pressure regulating valve 3, the nitrogen generator membrane group 5 can utilize compressed air to produce nitrogen, 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. Nitrogen generator membrane group 5 is given vent to anger and is held connection nitrogen gas holding vessel 8, and pure nitrogen gas is stored in nitrogen gas holding vessel 8, nitrogen gas charging valve 9 is connected to nitrogen gas holding vessel 8, nitrogen gas charging valve 9 is connected ultrasonic cleaning drying chamber 12, consequently, can be when using, and pure nitrogen gas lets in ultrasonic cleaning drying chamber 12 through nitrogen gas charging valve 9.

Based on the structure, when the microwave heating device is used, 99.9% purity low dew point dry nitrogen is filled in the microwave heating process, so that water evaporated from raw materials can be taken away quickly, the raw materials can be prevented from being oxidized and yellowed, 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 (101.3KPa) 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.

Further, the ultrasonic cleaning drying chamber comprises a liquid level limiting overflow valve 26, 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 meter 14 detects that the addition amount of deionized water in the ultrasonic cleaning drying chamber 12 is excessive, the liquid level limiting overflow valve 26 can be opened, and cleaning liquid can be discharged outwards through the liquid level limiting overflow valve 26, so that the liquid level height of the ultrasonic cleaning drying chamber 12 meets the use requirement. The discharged water can be directly discharged or reused.

In order to realize the recycling of the cleaning liquid. Further, the device also comprises a washing water return tank 30 and a washing water filtering membrane 31, wherein one end of the washing water return tank 30 is connected with the washing drain valve 25 and the liquid level limiting overflow valve 26, the other end of the washing water return tank 30 is connected with one end of the washing water filtering membrane 31, and the other end of the washing water filtering membrane 31 is connected with the washing water storage tank 32. 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, and then enters the cleaning water filtering membrane 31 equipment, the cleaning liquid is filtered to remove impurities, and returns to the original state to flow back to the cleaning water storage tank 32, so that the repeated reuse of the cleaning liquid is realized.

Further, a thermocouple 15 is also included, and the thermocouple 15 is arranged 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 drying system components are arranged inside the system structure installation and control cabinet 1. The drying process is set by the human-machine control interface 2. The PLC in the system structure installation and control cabinet 1 respectively controls and drives all related parts to link through a pre-programmed working flow.

The compressed air interface 36 is connected with an air inlet of a compressed air freeze dryer 35, an air outlet of the compressed air freeze dryer 35 is connected with an inlet of an air impurity filter 34, an outlet of the air impurity filter 34 is connected with an inlet of an air oil filter 33, an outlet of the air oil filter 33 is connected with an inlet of a pressure regulating valve 3, an outlet of the pressure regulating valve 3 is connected with an inlet of a compressed air membrane separation dryer 4 and an inlet of a nitrogen generator membrane group 5, an outlet of the compressed air membrane separation dryer 4 is connected with an inlet of a dry air storage tank 6, an outlet of the dry air storage tank 6 is connected with an inlet of a feeding blowing valve 19 and an inlet of a discharging blowing valve 21, an outlet of the nitrogen generator membrane group 5 is connected with an inlet of a nitrogen storage tank 8, an outlet of the nitrogen storage tank 8 is connected with an inlet of a nitrogen.

The ultrasonic cleaning and drying chamber 12 is connected with the air suction port of the vacuum flapper valve 7 through a vacuum pipeline, the air outlet of the vacuum flapper 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 and drying chamber 12 is connected with the waveguide outlet of the microwave generator 28 through a waveguide flange special for microwave. The ultrasonic cleaning and drying chamber 12 is connected with the material level meter 13 through a quick-connection flange, the ultrasonic cleaning and drying chamber 12 is connected with the cleaning water level meter 14 through a quick-connection flange, the ultrasonic cleaning and drying chamber 12 is connected with the thermocouple 15 through a quick-connection flange, and the ultrasonic cleaning and drying chamber 12 is fixedly connected with the ultrasonic vibration generator 22 through embedded welding bolts. The ultrasonic cleaning and drying chamber 12 is connected with the inlet of the discharge port valve 23 through a discharge port flange by a quick-connection flange. The outlet of the discharge port valve 23 is connected with the feed port of the blanking venturi tube device 24 through a quick-connection flange. The air inlet of the compressed air of the blanking venturi device 24 is connected with the air outlet of the blanking air blowing valve 21 through a quick air connecting pipe joint. The discharge port of the blanking venturi tube device 24 is connected with the feed port of the re-absorption preventing discharge hopper 17 through a stainless steel pipeline. The discharge port of the re-absorption preventing discharge hopper 17 is fixedly connected with the base of the feed port of the injection molding machine through a flange, and the raw materials after dust removal and drying can be directly supplied to the injection molding machine.

The inlet of the ultrasonic cleaning drying chamber 12 is connected with the outlet of the inlet valve 10 through a quick-connection flange, the inlet of the inlet valve 10 is connected with the outlet of the metering feeding hopper 11 through a quick-connection flange, the inlet of the metering feeding hopper 11 is connected with the outlet of the feeding venturi tube device 20 through a quick-connection flange and a joint through a stainless steel pipeline and a joint, the inlet of the feeding venturi tube device 20 is connected with the outlet of the raw material bin 18 to be dried through a quick-connection flange, and the compressed air inlet of the feeding venturi tube device 20 is connected with the air outlet of the feeding air blowing valve 19 through an air pipe and a quick joint. 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 water 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 water 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. 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 and blowing valve 19 connected with the dry air storage tank 6, blowing the compressed air into the dry compressed air through an air inlet of a feeding venturi tube device 20, and conveying 1-5 kilograms of raw materials which are preset in advance each time into a metering and 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 tube device 20; opening a feed inlet valve 10 of a metering feeding hopper 11 connected with an ultrasonic cleaning and drying chamber 12, enabling the raw material to be cleaned and dried to fall into the ultrasonic cleaning and drying chamber 12, indicating that the highest allowable material level is reached when the raw material is contacted with a material level meter, and closing the feed inlet valve 10; opening the cleaning water inlet valve 16, the liquid level limiting overflow valve 26 and the cleaning water pump 27, conveying cleaning liquid into the ultrasonic cleaning drying chamber 12 from the cleaning water storage tank 32 through a pipeline connected with the ultrasonic cleaning drying chamber 12, and closing the cleaning water inlet valve 16, the liquid level limiting overflow valve 26 and the cleaning water pump 27 when the cleaning water reaches the set position of the cleaning water level gauge 14; starting the ultrasonic vibration generator 22, enabling the raw material to pass through the ultrasonic vibration generator 22 and jointly act on the raw material with deionized purified water for ultrasonic cleaning, ending the cleaning process when the set cleaning time is reached, and closing the ultrasonic vibration generator 22; opening a washing drain valve 25, allowing the washing liquid and the washed dust impurities to flow back to a washing water return tank 30 through the washing drain valve 25, and closing the washing drain valve 25; starting a microwave generator 28, starting a vacuum pump 29, and connecting a vacuum baffle valve 7 and a nitrogen gas charging valve 9 of the ultrasonic cleaning drying chamber 12, performing microwave heating drying according to the vacuum degree, temperature and time set by a program, and automatically tracking and setting the drying temperature, the vacuum degree and the time by an electric control program for control; after the drying is finished, the nitrogen inflation valve 9 is opened, the dry nitrogen is filled to the standard atmospheric pressure (101.3KPa), then 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 re-absorption preventing discharge hopper 17 through a 304 stainless steel pipeline and is fixedly connected with the injection molding machine base feed port through the discharge port of the re-absorption preventing discharge hopper 17 to supply the processing materials for the injection molding machine, and the whole drying process is finished. The steps and the process are repeated for the next raw material drying process.

In the process, the raw material is 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 material is ensured not to be polluted, and the raw material is protected from absorbing moisture again.

The cleaned dust and impurities flow back to the cleaning water return tank along with the cleaning liquid in a one-way mode, the impurities and the foreign matters are subjected to membrane separation water treatment and filtration, the cleaning is repeated for the next time after the molecular level filtering precision is achieved, the cleaned dust and pollutants are remained in the cleaning water filtering membrane, no dust is discharged outwards, and the optical lens raw material reaches the highest level of cleanliness in the field of processing of the existing lens plastic resin raw material.

The nitrogen introduced into the drying chamber during and after the drying process is dry gas which reaches 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 interference of external environment. No dust and pollutants are discharged to the environment in the drying process, only water vapor is discharged, the environment requirements of a thousand-level purification workshop for processing the lens are not influenced, and the method is environment-friendly.

The raw materials are free of dust pollution in a microwave heating mode, the heating speed is high, the traditional hot air drying period can be shortened to be within 1 hour from several hours, the energy consumption is saved, the efficiency is high, the saved several-hour drying time can be directly used for production, more values are created, and the utilization rate of the injection molding machine is improved.

The invention is mainly characterized in that all links of possible raw material pollution factors from the source to the whole process of a user terminal are thoroughly solved, the pollution of the raw materials in the packaging process before leaving the factory, the pollution of the drying process, the secondary pollution of the conveying link, no dust discharge in the work and no dust pollution to the thousand-level purification processing environment are avoided, and the dried raw materials can keep the purity degree higher than that of the raw materials when leaving the factory. The drying mode before processing of the optical resin raw material fills up the domestic blank, provides a brand new drying treatment 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.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.