Microwave dewatering and feeding device and method

Abstract

The invention discloses a microwave dewatering and feeding device and method. Belongs to the technical field of optical glass manufacturing. The problems that the drying efficiency of water in the batch is low, and metal coloring impurities are possibly introduced are mainly solved. The method is mainly characterized by comprising five parts, namely batch feeding, batch conveying, microwave water removal, metal detection and charging, the batch supply part is located above one side of the batch conveying part, the microwave water removal part is located right above the batch conveying part, the charging part is located at the lowermost part of the other side of the batch conveying part, and the metal detection part is located at the tail of the batch conveying part and in the middle of the upper side of a material guide plate of a material spoon of the charging part; the batch continuously flows to the batch conveying part through an outlet of the batch supply part, moisture is removed by the microwave water removal part in the conveying process, and the dried batch flows into the feeding part after being subjected to metal detection by the metal detection part. The device is mainly used for high-efficiency water removal and feeding before melting of the optical glass batch.

Description

Technical Field

[0001] The invention belongs to the technical field of optical glass manufacturing and specifically relates to a microwave dehydration and feeding device and method. Background Art

[0002] There are many types of optical glass, and the glass composition systems are diverse. Common glass composition systems include B 2 O 3 -SiO 2 -R 2 O、RF-P 2 O 5 -RO 2 ,La 2 O 3 -B 2 O 3 -RO, R 2 O-TiO 2 -SiO 2 Due to the complex glass composition system, the raw materials used are of various types and properties. Under conventional storage methods, some raw materials easily absorb moisture from the air, causing the water content in the glass batch to increase. For special optical glass melting, the increase in water content will cause a large amount of volatilization of certain components in the glass, resulting in optical glass defects such as refractive index fluctuations, streaks, and increased foreign matter, which seriously affects the product yield.

[0003] In order to better remove moisture from glass batch materials, a common method is to use a drying box or a mesh belt drying furnace to dry the batch materials. Since drying boxes or mesh belt drying furnaces use heat radiation to dry, and the drying is performed from the outside to the inside, the drying efficiency is low. In order to improve the drying efficiency, the drying temperature is generally increased and the batch materials are turned over, which can easily cause colored metals to enter the batch materials, thereby causing metal colored impurities to enter the glass during the drying process, causing the transmittance of the optical glass to decrease. Summary of the invention

[0004] The purpose of the present invention is to address the above situation and to propose a highly efficient water removal and feeding device and method for glass batch materials before melting.

[0005] The technical solution of the device of the present invention is: a microwave dehydration and feeding device, which is characterized by: consisting of five parts: batch material supply, batch material transportation, microwave dehydration, metal detection and feeding; wherein the batch material supply part is located above one side of the batch material transportation part, the microwave dehydration part is located directly above the batch material transportation part, the feeding part is located at the bottom of the other side of the batch material transportation part, and the metal detection part is located at the tail of the batch material transportation part and the middle part of the upper side of the guide plate of the feeding spoon of the feeding part; the batch material continuously flows to the batch material transportation part through the outlet of the batch material supply part, and the water in the batch material is removed by the microwave dehydration part during the transportation process of the batch material transportation part, and the dried batch flows into the feeding part after metal detection by the metal detection part.

[0006] The batch material supply part described in the technical solution of the device of the present invention is composed of a silo, a knocker, a regulating valve, a cover plate and a thickness adjustment plate; the knocker is arranged on the outer side of the silo, and its knocking strength and frequency are adjusted by a control circuit; the regulating valve is arranged at the bottom of the silo, and the opening and closing size of the regulating valve can be freely adjusted; the cover plate is arranged on the batch material conveying part around the silo outlet, connected with the microwave dehydration part, completely covering and wrapping the upper and side parts of the batch material conveying part to reduce microwave leakage; the thickness adjustment plate is arranged on the upper part of the batch material conveying part on the inner side of the cover plate, and the distance between it and the conveyor belt is adjustable.

[0007] The batch material conveying part described in the technical solution of the device of the present invention is composed of a group of support rollers, a conveyor belt, a group of drive roller shafts, a motor and a conveying sealing shell; the support rollers are rotatably arranged horizontally and evenly installed on the bracket, the conveyor belt is placed on the support rollers, the conveying sealing shell is outwrapped on the bottom side and both end surfaces of the support rollers, the drive roller shafts are located at the lower part and outer side of the conveying sealing shell, driven by the motor, the conveying sealing shell is a stainless steel shell, which is used to adjust the smooth movement of the conveyor belt; the silo outlet of the batch material supply part is installed above the batch material conveying conveyor belt and at a certain distance, and the batch material continuously flows to the conveyor belt through the silo outlet and is transported forward.

[0008] The technical solution of the device of the present invention also includes a dust collector; the dust collector is located at the lower part of the conveyor belt of the driving roller shaft on the unloading side.

[0009] The microwave dehydration part in the technical solution of the device of the present invention is composed of a microwave generator, a microwave chamber, an exhaust duct, and an exhaust port; the microwave chamber is welded by multiple stainless steel plates, an exhaust port is opened at the upper end, and the exhaust duct is connected to the exhaust port; a hole is opened on one side of the microwave chamber for installing and fixing the microwave generator; the bottom of the microwave chamber is completely open, and is attached to and fixed to the transmission sealing shell to form a closed space to prevent microwave leakage.

[0010] In the technical solution of the device of the present invention, there are one or more microwave chambers; the multiple microwave chambers are connected in sequence.

[0011] The metal detection part in the technical solution of the device of the present invention is composed of a material guide plate, a metal detector, a vibrator, a material receiving hopper and a material discharge plate; the material guide plate is obliquely installed on the lower side of the driving roller shaft on the material discharge side, the vibrator is installed on the bottom side of the material guide plate, the metal detector is installed on the upper side of the material guide plate, the material receiving hopper is placed directly below the lowest point of the material guide plate, and the material discharge plate is installed at the bottom of the material receiving hopper, and the opening and closing are controlled by a program.

[0012] The metal detector described in the technical solution of the device of the present invention is used to detect the content limit of the metal material in the batch material, issue an alarm and stop the batch material conveying part and the feeding part.

[0013] The feeding part in the technical solution of the present invention is composed of a feeder and a feeding spoon; the feeder is arranged on a slider that can move in two directions, vertically and horizontally, and the slider is fixed on a slide rail. The feeder can realize parallel movement in four directions, left, right, front and back, through the slider and slide rail device; the feeding spoon is a water-cooled feeding spoon, which is welded from double-layer stainless steel and is provided with an internal circulating cooling water channel and inlet and outlet nozzles for the inflow of batch materials; the feeding spoon is connected to the rotating mechanism of the feeder through a stainless steel pipe and can rotate 180° clockwise and counterclockwise.

[0014] The technical solution of the method of the present invention is: a method for microwave dehydration and feeding, which is characterized by comprising the following steps: (1) Place the batch material (10) into the silo of the batch material supply part, open the regulating valve and the knocker to allow the batch material to flow downward, and turn on the conveyor belt of the batch material transport part to allow the batch material to be transported on the conveyor belt toward the outlet side: (2) turning on or sequentially turning on the microwave generator on the microwave chamber of the microwave dehydration part to allow the batch material in the microwave chamber to absorb microwaves and generate heat, and turning on the exhaust fan to exhaust air to allow the water vapor evaporated by the heat to be discharged from the microwave chamber; (3) Adjust the thickness adjustment plate of the batch material supply part so that the batch material under the silo is evenly spread on the conveyor belt; (4) Turn on the metal detector of the metal detection part and adjust the lower limit of the alarm detection amount to keep the metal detector in normal working condition and monitor the metal impurities in the batch material; (5) Start the vibrator on the guide plate of the metal detection part to allow the batch material to flow smoothly into the receiving hopper. At this time, the discharge plate is closed to ensure that the batch material is placed in the receiving hopper; (6) Start the feeder of the feeding part and let the feeder feed according to the process requirements. Initially, the feeder spoon of the feeder is located below the receiving hopper, the discharge plate is opened, and the batch material falls into the feeder spoon to complete the material receiving. Then the feeder moves to make the feeder spoon enter the furnace, and then rotates the feeder spoon to let the batch material fall into the furnace. The feeder exits and returns to the material receiving state; (7) Turn on the vacuum cleaner of the batch material conveying part to suck the batch materials adhering to the conveyor belt into the dust bag to keep the conveyor belt and the environment clean; (8) Once the metal detector alarm occurs, the knocker, conveyor belt and feeder will stop working. After manual troubleshooting, follow the above steps in sequence.

[0015] Beneficial effects of the present invention: The present invention integrates the drying, metal detection and feeding of glass batches into one device, thereby reducing the risk of impurities introduced during the batch processing procedure and improving production efficiency. The microwave heating and drying used in the present invention generates heat inside the batch, thereby improving the drying efficiency and avoiding the low efficiency of traditional radiation heating from the surface to the inside, especially significantly improving the drying efficiency of loosely structured glass batches. The transmission belt of the present invention does not absorb microwaves and does not generate heat itself, and only part of the heat is conducted by the glass batch, so it has high strength and lifespan.

[0016] The invention is mainly used for efficient water removal and material addition before melting of optical glass batch materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a microwave dehydration and feeding device of the present invention.

[0018] In the figure: 1- silo; 2- knocker; 3- regulating valve; 4- cover plate; 5- thickness adjusting plate; 6- exhaust port; 7- microwave generator; 8- microwave chamber; 9- exhaust duct; 10- batch material; 11- transmission roller; 12- conveyor belt; 13- support roller; 14- guide plate; 15- metal detector; 16- vibrator; 17- vacuum cleaner; 18- hopper; 19- discharge plate; 20- feeding spoon; 21- feeder; 22- motor. DETAILED DESCRIPTION

[0019] like Figure 1 The microwave dehydration and feeding device of the present invention comprises: a silo 1, a knocker 2, a regulating valve 3, a cover plate 4, a thickness adjustment plate 5, an air exhaust port 6, a microwave generator 7, a microwave cavity 8, an air exhaust duct 9, a batch material 10, a transmission roller 11, a conveyor belt 12, a support roller 13, a material guide plate 14, a metal detector 15, a vibrator 16, a vacuum cleaner 17, a material receiving hopper 18, a material discharge plate 19, a feeding spoon 20, a feeder 21 and a motor 22.

[0020] The microwave dehydration and feeding device of the present invention is composed of five parts: batch material supply, microwave dehydration, batch material transportation, metal detection and feeding. Among them, the batch material supply part is located above one side of the batch material transportation part, the microwave dehydration part is located directly above the batch material transportation part, the feeding part is located at the bottom of the other side of the batch material transportation part, and the metal detection part is located at the tail of the batch material transportation part and the middle of the upper side of the guide plate 14 of the feeding spoon 20 of the feeding part. The outlet of the silo 1 of the batch material supply part is installed above the conveyor belt 12 of the batch material transportation part and at a certain distance. The batch material 10 flows continuously from the outlet of the silo 1 to the conveyor belt 12 and is transported forward. After being heated and removed from the water in the batch material 10 by the multiple microwave chambers 8 above the batch material transportation part, the dried batch material 10 is detected by the metal detector 15 and then flows into the feeding spoon 20 of the feeding part.

[0021] The batch material supply part of the present invention includes a silo 1, a knocker 2, a regulating valve 3, a cover plate 4, and a thickness adjustment plate 5. The upper part of the silo 1 is a cylindrical cavity, the middle part is a conical cavity, and the lower part is a discharge channel tube. The silo 1 contains glass batch material 10. The knocker 2 is installed on the outside of the conical cavity of the silo 1, and its knocking intensity and frequency can be adjusted by the control circuit. The regulating valve 3 is located in the channel tube, and the valve opening and closing size can be freely adjusted. The thickness adjustment plate 5 is located on one side of the batch material movement direction of the channel tube, located on the upper part of the conveyor belt 12, and located between the silo 1 and the microwave chamber 8, and the distance from the conveyor belt 12 can be adjusted. The cover plate 4 surrounds the discharge channel tube and the thickness adjustment plate 5 at the lower part of the silo 1, and the cover plate 4, the microwave chamber 8 and the outer shell of the batch material conveying part are enclosed to form a closed space to prevent microwave leakage.

[0022] The batch material conveying part of the present invention comprises a group of support rollers 13, a conveyor belt 12, a group of drive roller shafts 11, a motor 22, a conveyor sealing shell and a dust collector 17. A group of rotatable support rollers 13 are horizontally arranged and evenly installed on a bracket, the conveyor belt 12 is placed on the support rollers 13, the conveyor sealing shell is wrapped around the bottom side and both end faces of the support rollers 13, the conveyor sealing shell is a stainless steel shell, the conveyor belt 12 is wound around a group of drive roller shafts 11, the drive roller shafts 11 are used to adjust the smooth movement of the conveyor belt, and the conveyor belt 12 is driven by the motor 22 to run in the direction of the arrow, and the dust collector 17 is located at the bottom of the conveyor belt 12 on the bottom side that bypasses the first drive roller shaft 11.

[0023] The microwave dehydration part of the present invention includes a microwave generator 7, a microwave chamber 8, an exhaust duct 9 and an exhaust port 6. Each microwave chamber 8 is welded from multiple stainless steel plates. An exhaust port 6 is opened at the upper end of the microwave chamber 8 and connected to the exhaust duct 9; a hole is opened on one side of the microwave chamber 8 for installing and fixing the microwave generator 7; the bottom of the microwave chamber 8 is completely open, and is attached and fixed to the stainless steel shell of the batch material conveying part to form a stainless steel closed space to prevent microwave leakage. The microwave chamber 8 is easy to disassemble, easy to install and firm, and has strong microwave leakage prevention. The number can be increased or decreased according to the drying and dehydration effect.

[0024] The metal detection part of the present invention comprises a guide plate 14, a metal detector 15, a vibrator 16, a hopper 18, and a discharge plate 19. The guide plate 14 is obliquely installed on the lower side of the first transmission roller 11, the vibrator 16 is installed on the bottom side of the guide plate 14, the metal detector 15 is installed on the upper side of the guide plate 14, the hopper 18 is placed directly below the lowest point of the guide plate 14, and the discharge plate 19 is installed at the bottom of the hopper 18, which can be opened and closed by program control. The metal detector 15 is used to detect the content limit of the metal material in the batch material 10, issue an alarm and stop the batch material conveying action and the feeding action of the feeder 21.

[0025] The feeding part of the present invention comprises a feeder 21 and a water-cooled feeder spoon 20. The feeder 21 can move in parallel in four directions, left, right, front, and back. The feeder spoon 20 is welded from double-layer stainless steel, with circulating cooling water inside, and can rotate 180° clockwise and counterclockwise.

[0026] The method of using the microwave dehydration and feeding device described above of the present invention comprises the following steps: (1) Put the batch material 10 into the silo 1, open the regulating valve 3 and the knocker 2 to make the batch material 10 flow downward, and turn on the conveyor belt 12 to allow the batch material 10 to be transported on the conveyor belt 12 in the direction of the arrow; (2) Turning on the microwave generator 7 on each microwave cavity 8 in turn, allowing the batch material 10 in the microwave cavity 8 to absorb microwaves and generate heat, and turning on the exhaust fan to exhaust air, allowing the heated and evaporated water vapor to be discharged from the microwave cavity 8; (3) Adjust the thickness adjustment plate 5 so that the batch material 10 under the silo 1 is evenly spread on the conveyor belt 12; (4) Turn on the metal detector 15 and adjust the lower limit of the alarm detection amount so that the metal detector 15 is always in a normal working state to monitor the metal impurities in the batch material 10; (5) Start the vibrator 16 on the guide plate 14 to allow the batch material 10 to flow smoothly into the receiving hopper 18. At this time, the discharge plate 19 is closed to ensure that the batch material 10 is placed in the receiving hopper 18; (6) Start the feeder 21 and let the feeder 21 feed materials according to the process requirements. Initially, the feed spoon 20 of the feeder 21 is located below the receiving hopper 18, the discharge plate 19 is opened, and the batch material 10 falls into the feed spoon 20 to complete the material receiving. Then, the feeder 21 moves to allow the feed spoon 20 to enter the furnace, and then rotates the feed spoon 20 to allow the batch material 10 to fall into the furnace. The feeder 21 exits and returns to the material receiving state. (7) Turn on the vacuum cleaner 17 to suck the batch material 10 adhering to the conveyor belt 12 into the dust bag to keep the conveyor belt 12 and the environment clean.

[0027] (8) Once the metal detector 15 alarms, the knocker 2, conveyor belt 12, and feeder 21 stop working. After manual troubleshooting, the above steps are followed in sequence.

Claims

1. A microwave dehydration and feeding device, characterized in that: The invention comprises five parts: batch material supply, batch material conveying, microwave dehydration, metal detection and feeding; wherein the batch material supply part is located above one side of the batch material conveying part, the microwave dehydration part is located directly above the batch material conveying part, the feeding part is located at the bottom of the other side of the batch material conveying part, and the metal detection part is located at the tail of the batch material conveying part and the middle part of the upper side of the guide plate of the feeding spoon of the feeding part; the batch material (10) continuously flows to the batch material conveying part through the outlet of the batch material supply part, and the water in the batch material (10) is removed by microwaves in the microwave dehydration part during the conveying process of the batch material conveying part, and the dried batch material (10) flows into the feeding part after metal detection by the metal detection part.

2. A microwave dehydration and feeding device according to claim 1, characterized in that: The batch material supply part is composed of a silo (1), a knocker (2), a regulating valve (3), a cover plate (4) and a thickness regulating plate (5); the knocker (2) is arranged on the outer side of the silo (1), the regulating valve (3) is arranged at the bottom of the silo (1), the cover plate (4) is arranged on the batch material conveying part around the outlet of the silo (1), connected with the microwave dehydration part, and completely covers and wraps the upper part and the side part of the batch material conveying part; the thickness regulating plate (5) is arranged on the upper part of the batch material conveying part inside the cover plate (4).

3. A microwave dehydration and feeding device according to claim 1 or 2, characterized in that: The batch material conveying part is composed of a group of supporting rollers (13), a conveyor belt (12), a group of driving roller shafts (11), a motor (22) and a conveying sealing shell; the supporting rollers (13) are rotatably arranged horizontally and evenly installed on a bracket, the conveyor belt (12) is placed on the supporting rollers (13), the conveying sealing shell is wrapped around the bottom side and both end surfaces of the supporting rollers (13), and the driving roller shafts (11) are located at the bottom and outside of the conveying sealing shell and are driven by the motor (22).

4. A microwave dehydration and feeding device according to claim 3, characterized in that: It also includes a dust collector (17); the dust collector (17) is located below the conveyor belt (12) of the drive roller (11) on the unloading side.

5. A microwave dehydration and feeding device and method according to any one of claims 1-2 and 4, characterized in that: The microwave dehydration part is composed of a microwave generator (7), a microwave chamber (8), an exhaust duct (9), and an exhaust port (6); the microwave chamber (8) is formed by welding a plurality of stainless steel plates, an exhaust port (6) is provided at the upper end, and the exhaust duct (9) is connected to the exhaust port (6); a hole is provided on one side of the microwave chamber (8) for installing and fixing the microwave generator (7); the bottom of the microwave chamber (8) is completely open and is attached to and fixed to the transmission sealing shell to form a closed space to prevent microwave leakage.

6. A microwave dehydration and feeding device and method according to claim 5, characterized in that: There are one or more microwave chambers (8); and the multiple microwave chambers (8) are connected in sequence.

7. A microwave dehydration and feeding device and method according to any one of claims 1-2, 4, and 6, characterized in that: The metal detection part is composed of a material guide plate (14), a metal detector (15), a vibrator (16), a material receiving hopper (18) and a material discharge plate (19); the material guide plate (14) is obliquely installed on the lower side of the driving roller shaft (11) on the material discharge side, the vibrator (16) is installed on the bottom side of the material guide plate (14), the metal detector (15) is installed on the upper side of the material guide plate (14), the material receiving hopper (18) is placed directly below the lowest point of the material guide plate (14), and the material discharge plate (19) is installed at the bottom of the material receiving hopper (18) and is opened and closed by program control.

8. A microwave dehydration and feeding device and method according to claim 7, characterized in that: The metal detector (15) is used to detect the content limit of the metal material in the batch material, issue an alarm and stop the batch material conveying part and the material adding part.

9. A microwave dehydration and feeding device and method according to any one of claims 1-2, 4, 6, and 8, characterized in that: The feeding part is composed of a feeding machine (21) and a feeding spoon (20); the feeding machine (21) is arranged on a slider that can move in two directions, vertically and horizontally, the slider is fixed on a slide rail, and the feeding machine (21) can achieve parallel movement in four directions, namely left, right, front and back, through the slider and slide rail device; the feeding spoon (20) is a water-cooled feeding spoon, which is welded from double-layer stainless steel and is provided with an internal circulating cooling water channel and water inlet and outlet nozzles; the feeding spoon (20) is connected to the rotating mechanism of the feeding machine (21) through a stainless steel pipe and can rotate 180 degrees clockwise and counterclockwise.

10. A method for dehydration and feeding using the microwave dehydration and feeding device according to any one of claims 1 to 9, characterized in that The following steps are involved: (1) Put the batch material (10) into the silo (1) of the batch material supply part, open the regulating valve (3) and the knocker (2) to make the batch material (10) flow downward, and turn on the conveyor belt (12) of the batch material transport part to make the batch material (10) be transported on the conveyor belt (12) toward the outlet side: (2) turning on or sequentially turning on the microwave generator (7) on the microwave chamber (8) of the microwave dehydration part to allow the batch material (10) in the microwave chamber (8) to absorb microwaves and generate heat, and turning on the exhaust fan to exhaust air to allow the water vapor evaporated by the heat to be discharged from the microwave chamber (8); (3) adjusting the thickness adjustment plate (5) of the batch material supply part so that the batch material (10) under the silo (1) is evenly spread on the conveyor belt (12); (4) turning on the metal detector (15) of the metal detection part and adjusting the lower limit of the alarm detection amount so that the metal detector (15) is always in a normal working state to monitor the metal impurities in the batch material (10); (5) starting the vibrator (16) on the guide plate (14) of the metal detection part to allow the batch material (10) to flow smoothly into the receiving hopper (18). At this time, the discharge plate (19) is closed to ensure that the batch material (10) is placed in the receiving hopper (18); (6) starting the feeder (21) of the feeding part, and allowing the feeder (21) to feed according to the process requirements. Initially, the feeder spoon (20) of the feeder (21) is located below the receiving hopper (18), the discharge plate (19) is opened, and the batch material (10) falls into the feeder spoon (20), completing the material receiving. Then, the feeder (21) moves to allow the feeder spoon (20) to enter the furnace, and then rotates the feeder spoon (20) to allow the batch material (10) to fall into the furnace. The feeder (21) exits and returns to the material receiving state; (7) Turning on the vacuum cleaner (17) of the batch material conveying part to allow the batch materials adhering to the conveyor belt (12) to be sucked into the dust collecting bag, thereby keeping the conveyor belt (12) and the environment clean; (8) Once the metal detector (15) sounds an alarm, the knocker (2), the conveyor belt (12), and the feeder (21) stop working. After manually troubleshooting, the above steps are followed in sequence.

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