WO2022041304A1

WO2022041304A1 - Adjustable grid plate-type far-infrared drying device

Info

Publication number: WO2022041304A1
Application number: PCT/CN2020/113259
Authority: WO
Inventors: 黄盛杰; 李建稳; 曾培源; 沈健民
Original assignee: 南京源昌新材料有限公司
Priority date: 2020-08-28
Filing date: 2020-09-03
Publication date: 2022-03-03
Also published as: CN111928633A

Abstract

An adjustable grid plate-type far-infrared drying device, comprising a drying box body (1), a screw feeder (4), a vibrating screen (6), a vibration motor (7) and far-infrared radiation grid plates (8); the screw feeder (4) is provided outside the drying box body (1), an outlet of the screw feeder (4) is connected to a feeding port (5) arranged at an upper end of the far-infrared drying box body (1) by means of a feeding tube, a discharging port arranged at the bottom of the drying box body (1) is connected to a feeding port of the screw feeder (4) by means of a discharging tube (21) obliquely arranged, a discharging port (11) and a one-way valve (12) arranged at the rear end of the discharging port (11) are arranged on the discharging tube (21), and an inlet of the screw feeder (4) is also connected to a wet material conveying tube (20); the vibrating screen (6) is arranged at the top end inside the drying box body (1), the vibrating screen (6) is composed of a screen plate main body (61) and screen plate holes (62), the vibration motor (7) is arranged at the bottom of the vibrating screen (6), and at least two drying units are arranged below the vibrating screen (6). The drying device has a simple structure, and increases the drying efficiency of materials and improves the safety of apparatus.

Description

[Title of invention formulated by ISA pursuant to Rule 37.2] An adjustable grid-type far-infrared drying device

technical field

The invention relates to the technical field of drying equipment, in particular to a high-efficiency adjustable grid plate type far-infrared drying device.

Background technique

Because far-infrared radiation has the characteristics of fast and efficient heating without media participation, it has been widely used in the field of heating. In grain drying machinery, Japan's Kaneko Agricultural Machinery Company and Taiwan Sanjiu Agricultural Machinery Company also introduced far-infrared heating and drying technology. The principle is to use far infrared rays to form a certain penetration depth on the surface of rice, wheat and corn, and to heat from the inside and outside of the material at the same time, so that the moisture inside the material can quickly diffuse to the surface layer. This technology greatly speeds up the drying rate of materials and improves energy utilization. However, all the far-infrared drying machines on the market currently use diesel combustion as a heat source, and the temperature of the far-infrared emitting coating is raised to generate radiation. Therefore, there are still aging and falling off of the far-infrared emitting coating, and the efficiency of multiple conversion of combustion energy is reduced. And it is easy to cause fire and other safety hazards.

In recent years, it has been found that graphitized carbon materials have the characteristics of emitting far-infrared rays efficiently under the drive of electric energy with low power density, so they are used in the field of material drying; the existing drying equipment for radiating far-infrared rays prepared by carbon materials has The main working principle is to transport the material to the highest position in the dryer, and then let the material slide down naturally along the diversion groove of the far-infrared radiation plate inside the dryer. Far infrared heats and dries the material. Although the far-infrared radiation plate made of carbon material has high electrothermal radiation conversion, because the residence time of the material on the far-infrared radiation plate is too short and it is difficult to accurately control, there is still a lot of room for improvement in drying efficiency. Therefore, this patent A safe, energy-saving and high-efficiency controllable carbon material grid plate type far-infrared drying equipment is proposed.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a safe, energy-saving and high-efficiency controllable grid plate type far-infrared drying device in view of the above shortcomings of the prior art.

The technical solution of the present invention to solve the above technical problems is: a high-efficiency adjustable grid plate type far-infrared drying device, comprising a drying box, a screw feeder, a vibrating screen, a vibration motor and a far-infrared radiation grid, the drying box There is a screw feeder on the outside, the outlet of the screw feeder is connected with the feed port set at the upper end of the far-infrared drying box through the feeding pipeline, and the discharge port set at the bottom of the drying box is connected with the feed port of the screw feeder It is connected by an inclined discharge pipe, and the discharge pipe is respectively provided with a discharge port and a one-way valve at the rear end of the discharge port. At the same time, the inlet of the screw feeder is also connected with the wet material conveying pipe. A vibrating screen is arranged at the top of the inside of the drying box. The vibrating screen is composed of a sieve plate main body and a sieve plate hole. The vibrating motor is arranged at the bottom of the vibrating screen, and at least two vibrating screens are arranged below the vibrating screen. A drying unit, each drying unit includes a drying chamber, a conveying wheel and a dehumidification chamber in sequence from top to bottom, a plurality of far-infrared radiation grids are vertically arranged in the drying chamber, and each far-infrared radiation grid is connected by a wire The power supply is connected to the outside of the drying box, and a channel for the falling of wet materials is formed between two adjacent far-infrared radiation grid plates, and the conveying wheel is arranged directly below each channel.

The technical scheme that the present invention is further limited is:

The aforesaid far-infrared radiation grid plate is a three-layer sandwich structure, the upper and lower layers are wear-resistant layers, and the middle layer is an infrared radiation layer.

The aforementioned wear-resistant layer is made of polyethylene, high-density polyethylene, polytetrafluoroethylene, methyl methacrylate, polyisoprene plastic or tempered glass, which is wear-resistant and has high far-infrared transmittance. Under the premise of normal use of the far-infrared radiation grid, the infrared radiation layer is effectively protected to avoid the wear of the infrared radiation layer after long-term use, resulting in reduced drying efficiency and material pollution.

The aforementioned infrared radiation layer is made of a mixture of one or more carbon materials selected from graphite, expandable graphite, activated carbon, carbon nanotubes, graphene and carbon fibers. High drying efficiency, but also reduce energy consumption.

The aforementioned drying box is provided with a temperature sensor and a humidity sensor.

The aforementioned air inlet is provided on the drying box, the air inlet is in the same position as the moisture exhaust chamber in the drying box, and is connected to the blower on the installation ground through the dry air duct; the side of the drying box opposite to the air inlet is provided There is an air outlet corresponding to its position, and the air outlet is connected to the induced draft fan set on the ground through the wet air duct, which can balance the uneven pressure of the air in the box and achieve the purpose of fast drying.

The aforementioned also includes a central controller, the input end of the central controller is connected with the output end of the temperature sensor and the humidity sensor, and the output end of the central controller is respectively connected with the screw feeder, the feeding wheel, and the power supply connected to the far-infrared radiation grid. , vibration motor, blower and induced draft fan are connected.

The distance between the aforementioned two adjacent far-infrared radiation grid plates is 5 mm-cm.

The beneficial effects of the present invention are as follows: the present invention adopts the far-infrared drying sieve plate with heating function to replace the traditional hot blast stove as the heat source, the electric energy is directly converted into heat energy and infrared radiation energy, and the traditional drying method that uses fuel combustion to indirectly provide heat energy is changed, The waste gas and waste residue produced by combustion are eliminated, saving energy and reducing emissions. The drying box of the present invention is provided with a plurality of drying units, which can improve the drying efficiency, and the drying chamber is composed of a plurality of vertically arranged far-infrared radiation grids, two adjacent ones. A channel for the falling of wet materials is formed between the two far-infrared radiation grids, which can store a large amount of materials and effectively increase the drying volume of the equipment; far-infrared rays can start heating from the inside and the surface of the material at the same time, accelerating the evaporation of water inside the material. , improving the dehydration rate; at the same time, compared with the traditional hot air drying, the grid-type far-infrared drying of the present invention can heat the material inside and outside at the same time, and reduce the defects such as "burst waist" and cracks caused by the excessive water loss of the outer layer of the rice. , maintain the integrity of the material; the present invention controls the feeding wheel through the central controller, which can accurately control the flow of the material, which can not only prevent the material from staying too short in the drying chamber and reduce the drying efficiency; If the dwell time is too long, it will be damaged, and the drying time of the material can be effectively controlled to achieve the purpose of efficient drying. At the same time, the size and speed of the feeding wheel can be adjusted to meet the needs of drying different materials;

In the present invention, an air inlet and an air outlet are arranged on the far-infrared drying box, and a blower and an induced draft fan are correspondingly arranged, so that during the drying process of the material, the blower can continuously send the drying air into the box through the air inlet. , and then the wet air is discharged from the air outlet by the induced draft fan, and the flow of the air in the box takes away the moisture evaporated from the material to improve the drying efficiency; a temperature sensor and a humidity sensor are installed in the drying box to monitor the drying box in real time. The temperature and humidity are fed back to the central controller. The central controller adjusts the power of the far-infrared radiant panel and the speed of the fan in real time according to the data fed back by the temperature/humidity detector to avoid the material temperature being too high.

Description of drawings

1 is a schematic sectional view of the present invention;

Fig. 2 is the side view of the present invention;

3 is a schematic diagram of the structure of the drying unit in the present invention;

Fig. 4 is the structure schematic diagram of vibrating screen in the present invention;

Fig. 5 is the structure schematic diagram of the middle and far infrared radiation grid plate of the present invention;

Fig. 6 is the top view of the present invention;

In the picture: 1. Wet material inlet; 2. Temperature detector; 3. Humidity detector; 4. Screw feeder; 5. Feed inlet; 6. Vibrating screen; 7. Vibrating motor; 8. Far-infrared radiation grid Plate; 9. Grain feeding wheel; 10. Ventilation port; 11. Discharge port; 12. One-way valve; 13. Induced draft fan; 14. Wet air duct; 15. Dry air duct; 16. Central controller; 17. Blower; 18. Material drying room; 19. Dehumidification room; 20. Material conveying pipe; 21. Discharging pipe; 61. Main body of sieve plate; layer; 101, air outlet; 102, air inlet.

detailed description

Example 1

This embodiment provides a high-efficiency adjustable grid plate type far-infrared drying device. The structure is shown in Figures 1-6, including a drying box 1, a screw feeder 4, a vibrating screen 6, a vibrating motor 7, and a far-infrared radiation grid plate. 8 and the central controller 16, the outer side of the drying box 1 is provided with a screw feeder 4, the outlet of the screw feeder is connected with the feeding port 5 provided at the upper end of the drying box 1 through a feeding pipeline, and the bottom of the drying box is provided with The discharge port of the screw feeder is connected with the feed port of the screw feeder through the inclined discharge pipe 21. The discharge pipe is respectively provided with a discharge port 11 and a check valve 12 at the rear end of the discharge port. The inlet of the feeder is also connected with the wet material conveying pipe 20, and a vibrating screen 6 is arranged at the top of the drying box. At the same time, there are 3 drying units under the vibrating screen, each drying unit includes a drying chamber 18, a conveying wheel 9 and a dehumidifying chamber 19 in sequence from top to bottom, and several far-infrared radiation grids are vertically arranged in the drying chamber The far-infrared radiation grid plate is a three-layer sandwich structure, the upper and lower layers are wear-resistant layers 81, and the middle layer is an infrared radiation layer 82, of which the wear-resistant layer is made of tempered glass, and the infrared radiation layer is made of graphite. The far-infrared radiation grids are connected to the power supply provided outside the drying box by wires, and a channel for the falling of wet materials is formed between two adjacent far-infrared radiation grids, the width of which is 3cm, and each channel is set directly below. There is the conveying wheel 9, a temperature sensor 2 and a humidity sensor 3 are arranged in the drying box, and a blower 17 is installed outside the drying box, and the blower is connected to the drying box through the dry air duct 15 installed on the drying box. The air inlet 102 on the body is provided with an air outlet 101 on the side of the far-infrared drying box opposite to the air inlet. The input end is connected with the output end of the temperature sensor and the humidity sensor, and the output end of the central controller is respectively connected with the screw feeder, the feeding wheel, the power supply connected with the far-infrared radiation grid, the vibration motor, the blower and the induced draft fan.

In this embodiment, the wet material enters the screw feeder 4 through the wet material conveying pipe to the inlet of the screw feeder, and is conveyed by the screw feeder 4 to the feed port 5 at the top of the drying box. The material port 5 reaches the vibrating screen 6. Driven by the vibrating motor 7, the vibrating screen 6 evenly disperses the material into the material drying chamber 18. The material in the drying chamber is conveyed by the grain feeding wheel 9 to the dehumidification chamber 19. The material in the chamber 19 enters the next drying unit by gravity. Before the material does not meet the drying requirements, the one-way valve 12 is always open, the discharge port 11 is always closed, the material reaches the bottom of the screw feeder 4 by gravity, and then passes through the transmission of the screw feeder 4. Feed port 5, repeat cycle drying. Until the drying of the material is completed, the valve 12 is closed, the discharge port 11 is opened, the material leaves the dryer from the discharge port 11 by gravity, and the drying of the material is completed.

In the process of drying the material in this embodiment, the blower 17 transmits the dry air from the periphery of the drying cabinet to the dry air duct 15 , and driven by the blower 17 , the dry air reaches the dehumidification through the air inlet 102 and the vent. Room 19, the humid air in the drying box is discharged from the dryer from the humid air duct 14 through the ventilation port and the air outlet 101 under the traction of the induced draft fan 13, and the temperature and humidity of the material are monitored in real time by the temperature detector 2 and the humidity detector 3. The humidity is fed back to the central controller 16, and the central controller 16 adjusts the operation of the far-infrared radiation grid and the fan in real time according to the data fed back by the temperature/humidity detector, so as to avoid material damage.

Example 2

This embodiment provides a high-efficiency adjustable grid plate type far-infrared drying device. The structure is shown in Figures 1-6, including a drying box 1, a screw feeder 4, a vibrating screen 6, a vibrating motor 7, and a far-infrared radiation grid plate. 8 and the central controller 16, the outer side of the drying box 1 is provided with a screw feeder 4, the outlet of the screw feeder is connected with the feeding port 5 provided at the upper end of the drying box 1 through a feeding pipeline, and the bottom of the drying box is provided with The discharge port of the screw feeder is connected with the feed port of the screw feeder through the inclined discharge pipe 21. The discharge pipe is respectively provided with a discharge port 11 and a check valve 12 at the rear end of the discharge port. The inlet of the feeder is also connected with the wet material conveying pipe 20, and a vibrating screen 6 is arranged at the top of the drying box. At the same time, there are 3 drying units under the vibrating screen, each drying unit includes a drying chamber 18, a conveying wheel 9 and a dehumidifying chamber 19 in sequence from top to bottom, and several far-infrared radiation grids are vertically arranged in the drying chamber The plate, the far-infrared radiation grid plate is a three-layer sandwich structure, the upper and lower layers are wear-resistant layers 81, and the middle layer is an infrared radiation layer 82, wherein the wear-resistant layer is made of polytetrafluoroethylene, and the infrared radiation layer is made of carbon nanotubes. Made of material, each far-infrared radiation grid is connected to the power supply set on the outside of the drying box through a wire, and a channel for the falling of wet materials is formed between two adjacent far-infrared radiation grids, the width of which is 3cm. The conveying wheel 9 is arranged directly under each channel, a temperature sensor 2 and a humidity sensor 3 are arranged on the drying box, and a blower 17 is installed outside the drying box, and the blower passes the dry air installed on the drying box. The duct 15 is connected to the air inlet 102 on the drying box, and an air outlet 101 is provided on the side of the far-infrared drying box opposite to the air inlet, and the air outlet is connected to the induced draft fan arranged on the drying box through the moist air duct 14 , the input end of the central controller is connected with the output end of the temperature sensor and the humidity sensor, and the output end of the central controller is respectively connected with the screw feeder, the feeding wheel, the power supply connected with the far-infrared radiation grid, the vibration motor, the blower and the guide connected to the fan.

Example 3

This embodiment provides a high-efficiency adjustable grid plate type far-infrared drying device. The structure is shown in Figures 1-6, including a drying box 1, a screw feeder 4, a vibrating screen 6, a vibrating motor 7, and a far-infrared radiation grid plate. 8 and the central controller 16, the outer side of the drying box 1 is provided with a screw feeder 4, the outlet of the screw feeder is connected with the feeding port 5 provided at the upper end of the drying box 1 through a feeding pipeline, and the bottom of the drying box is provided with The discharge port of the screw feeder is connected with the feed port of the screw feeder through the inclined discharge pipe 21. The discharge pipe is respectively provided with a discharge port 11 and a check valve 12 at the rear end of the discharge port. The inlet of the feeder is also connected with the wet material conveying pipe 20, and a vibrating screen 6 is arranged at the top of the drying box. At the same time, there are 3 drying units under the vibrating screen, each drying unit includes a drying chamber 18, a conveying wheel 9 and a dehumidifying chamber 19 in sequence from top to bottom, and several far-infrared radiation grids are vertically arranged in the drying chamber The plate, the far-infrared radiation grid plate is a three-layer sandwich structure, the upper and lower layers are the wear-resistant layer 81, the middle layer is the infrared radiation layer 82, the wear-resistant layer is made of high-density polyethylene, and the infrared radiation layer is made of graphene. Each far-infrared radiation grid is connected to the power supply set outside the drying box through a wire, and a channel for the falling of wet materials is formed between two adjacent far-infrared radiation grids, the width of which is 3cm. The conveying wheel 9 is arranged directly below the channel, a temperature sensor 2 and a humidity sensor 3 are arranged on the drying box, and a blower 17 is installed outside the drying box, and the blower passes through the dry air duct installed on the drying box. 15 is connected to the air inlet 102 on the drying box, and an air outlet 101 is provided on the side of the far-infrared drying box opposite to the air inlet. The input end of the central controller is connected with the output end of the temperature sensor and the humidity sensor, and the output end of the central controller is respectively connected with the screw feeder, the feeding wheel, the power supply, the vibration motor, the blower and the induced draft fan connected to the far-infrared radiation grid. connected.

In addition to the above-described embodiments, the present invention may also have other embodiments. All technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

A high-efficiency adjustable grid plate type far-infrared drying device, comprising a drying box, a screw feeder, a vibrating screen, a vibration motor and a far-infrared radiation grid, characterized in that a screw feeder is arranged outside the drying box, The outlet of the screw feeder is connected with the feed port set at the upper end of the far-infrared drying box through the feed pipe, and the discharge port set at the bottom of the drying box and the feed port of the screw feeder pass through the inclined discharge pipe The discharge pipe is provided with a discharge port and a one-way valve at the rear end of the discharge port. At the same time, the inlet of the screw feeder is also connected with the wet material conveying pipe, inside the drying box. The top is provided with a vibrating screen, the vibrating screen is composed of a sieve plate main body and a sieve plate hole, the vibrating motor is arranged at the bottom of the vibrating screen, and at least two drying units are arranged below the vibrating screen, each drying unit From top to bottom, it includes a drying chamber, a conveying wheel and a dehumidification chamber in sequence. A number of far-infrared radiation grids are vertically arranged in the drying chamber. A power supply is provided between two adjacent far-infrared radiation grid plates, and a channel for the falling of wet materials is formed.
The high-efficiency adjustable grid-type far-infrared drying device according to claim 1, wherein the far-infrared radiation grid is a three-layer sandwich structure, the upper and lower layers are wear-resistant layers, and the middle layer is an infrared radiation layer .
The high-efficiency adjustable grid plate type far-infrared drying device according to claim 2, wherein the wear-resistant layer is made of polyethylene, high-density polyethylene, polytetrafluoroethylene, methyl methacrylate, polyisoamyl Made of diene plastic or tempered glass.
The high-efficiency adjustable grid plate type far-infrared drying device according to claim 2, wherein the infrared radiation layer is made of one or more of graphite, expandable graphite, activated carbon, carbon nanotubes, graphene and carbon fiber. A variety of carbon materials are mixed.
The high-efficiency adjustable grid plate type far-infrared drying device according to claim 1 is characterized in that: a temperature sensor and a humidity sensor are arranged in the drying box.
The high-efficiency adjustable grid plate type far-infrared drying device according to claim 5, characterized in that: the drying box is provided with an air inlet, the air inlet is consistent with the position of the moisture exhaust chamber in the drying box, and passes through the drying box. The dry air duct is connected to the blower on the installation floor.
The grid plate type far-infrared drying device according to claim 6, wherein the side of the drying box opposite to the air inlet is provided with an air outlet corresponding to its position, and the air outlet is connected through a humid air duct An induced draft fan installed on the ground.
The high-efficiency adjustable grid plate type far-infrared drying device according to claim 7, further comprising a central controller, the input end of the central controller is connected with the output ends of the temperature sensor and the humidity sensor, and the central controller The output ends are respectively connected with the screw feeder, the feeding wheel, the power supply connected with the far-infrared radiation grid plate, the vibration motor, the blower and the induced draft fan.