CN109622377B - Reducing atmosphere microparticle sorting unit - Google Patents

Abstract

The invention discloses a reducing atmosphere fine particle sorting device, which is suitable for sorting carbon powder and metal powder with strong reducing properties. The device consists of three components: reducing atmosphere self-coupling constant-state gas supply module, air flotation separation module, and air vibration screening module. The reducing atmosphere self-coupling constant-state gas supply The selection module is connected with the air vibration screening module, and through the control of the reducing atmosphere self-coupling constant-state air supply module, the feed to the air flotation separation module is completed and a constant flow of air is provided; under reducing atmosphere conditions, through The air flotation sorting completes the primary sorting of the feed particles, and reproduces the secondary sorting of the reducing atmosphere micro-particles. The sorting and conveying process adopts reducing atmosphere wind power conveying, so as to realize the reducing atmosphere fine particle sorting of 20-20000 mesh with strong reducing carbon powder and metal powder.

Description

A reducing atmosphere microparticle sorting device

technical field

The invention relates to a microparticle sorting device, in particular to a reducing atmosphere microparticle sorting device suitable for 20-20000 mesh carbon powder and metal powder with strong reducibility, and belongs to the field of winnowing and screening.

Background technique

Strongly reducing powder represented by 20-20000 mesh carbon powder and metal powder is easy to deteriorate due to reaction with oxidizing gas components in the air due to its small particle size and active chemical properties. At present, most of the screening devices on the market are open. When the powder is screened in it, it is very easy to change the physical and chemical properties of the micro-particles due to factors such as friction, oxidation reaction, and rapid temperature rise, and even cause danger. The existing sorting device has the following problems: 1. It is impossible to achieve the goal of reductive screening and prevent the change of the physical and chemical properties of the micro-particles due to oxidation; 2. It cannot guarantee that the particles will not undergo intense mechanical friction during the screening process; 3. The relative stability of the temperature of the sieved particles cannot be guaranteed to prevent the possible problem of rapid temperature rise. For this reason, the development of a reducing atmosphere microparticle sorting device is of positive significance for the screening of strong oxidizing powders.

Contents of the invention

Technical problem: The purpose of the present invention is to overcome the deficiencies in the prior art and provide a reducing atmosphere microparticle sorting device with simple structure, reliable performance and good effect.

Technical solution: In order to achieve the above purpose, a reducing atmosphere microparticle sorting device of the present invention includes three components: a reducing atmosphere self-coupling constant-state air supply module, an air flotation sorting module, and an air vibration screening module , the reducing atmosphere self-coupling constant-state gas supply module is connected to the air flotation sorting module and the gas vibration screening module through the gas distribution pipe, and is controlled by the reducing atmosphere self-coupling constant-state gas supply module to the gas The flotation separation module completes the feeding and provides a constant flow of air to provide a stable reducing environment, temperature field and carrier gas for the operation; the air flotation separation module is used to screen the micro particles for the first time, and the dynamic buoyancy control Realize the first-level air flotation separation of the feed particle material; after that, use the air vibration screening module to use the high-frequency reciprocating air flow as the carrier, and realize the reduction of the particles after the first-level air flotation separation according to the set screening particle size Secondary Sorting of Atmospheric Microparticles.

The reducing atmosphere self-coupling constant-state air supply module includes sequentially connected waste absorber, reducing atmosphere retainer, drier and auto-coupling and gas circulation power device, through sequentially connected waste absorber, reducing atmosphere retainer, drying The device and auto-coupling and gas cycle power device complete the removal of suspended particles, impurity gas, suspended liquid, temperature control and flow rate of the return gas.

The self-coupling and gas cycle power device includes a pressure regulating controller, a temperature controller and a gas flow rate controller connected in sequence.

The air flotation separation module includes a separation cabin, a first flow control group, an upper grid for air flotation separation, a lower grid for air flotation separation, a dust sensor, a partition deflector, a feed air distribution port, a distribution Particle selection transmission channel; the first flow control group is set on one side of the sorting cabin, the partition deflector is set on the other side of the sorting cabin, the partition deflector and the sorting particle transmission channel They are connected to each other; track is provided on the side of partition deflector close to the sorting cabin, which communicates with the upper grid plate of air flotation separation and the lower grid plate of air flotation separation; the bottom of the sorting cabin is equipped with a self-coupling constant state supply The feed air distribution port connected to the air module, through the control of the auto-coupling and air circulation power device, completes the feed into the sorting cabin and provides a constant flow of air; the top outlet pipe of the sorting cabin and the feed air distribution port The air intake pipes are respectively connected with the air distribution pipes, and the air flotation separation upper grid and the air flotation separation lower grid are arranged at intervals in the sorting cabin, and the upper and lower sides of the air flotation separation upper grid and the air flotation separation Dust sensors for monitoring the amount of dust in each section are provided below the lower grid; the positions of the upper grid for air flotation separation and the lower grid for air flotation separation can be determined by the track arranged on the side of the partition deflector. Adjust up and down, the upper grid plate of the air flotation sorting can independently close the grid hole and close the upward airflow; The grids act synchronously. The lower grid of air flotation separation is driven by a servo motor to open and close the grid, and cooperates with the auto-coupling and air circulation power device to provide constant flow of gas. A pulsed high-pressure airflow is formed between the grids to improve the transmission efficiency of the air flotation separation module to separate the micro particles; flow down.

The first flow control group is composed of a plurality of columns, and each column can slide in the sorting cabin under the drive of the servo motor. By changing the positions of the plurality of columns in the first flow control group, the The cross-sectional area of any different sections of the sorting cabin.

The partition deflector is composed of a plurality of deflectors, and each deflector can open the deflector between the upper grid plate of air flotation separation and the lower grid plate of air flotation separation in different regions under the control of the servo motor , connecting the sorting cabin with the sorting particle delivery channel.

The gas vibration screening module includes a screening cabin, a second flow controller, an upper grid plate for gas vibration screening, a lower grid plate for gas vibration screening, a vibration gas generator, and a sorting particle receiver; the second The flow controller is arranged on one side of the screening cabin, and can slide into the screening cabin through the control of the servo motor to change the cross-sectional area of the control section area of the screening cabin; The intervals are arranged in the upper and lower side walls of the sorting cabin, and the screening of the particles to be screened is completed according to the mesh number difference between the upper grid plate of the gas vibration screening and the lower grid plate of the gas vibration screening; the vibration gas The generator is respectively connected with the reducing atmosphere self-coupling constant-state air supply module, the upper and lower flow air distribution pipes of the screening cabin, and the connecting pipe of the sorting particle receiver, so as to provide the oscillating air flow for the air vibration screening module; the sorting particle receiving The device and the second flow controller are symmetrically arranged to realize the collection of particles after screening; the upper grid plate of the air vibration screening and the lower grid plate of the air vibration screening respectively perform the opening and closing actions of the grid plates independently, and the air vibration screening The closing action of the lower grid plate is linked to the closing action of the oscillating gas generator, so that the air vibration screening module enters the micro particle transmission mode from the screening mode, and the upper grid plate of the gas vibration screening is driven by a servo motor to open and close the grid plate Cooperating with the auto-coupling and gas circulation power device to provide constant flow of gas, a pulsed high-pressure airflow is formed between the upper grid plate of the gas vibration screen and the lower grid plate of the gas vibration screen to improve the transmission efficiency of the gas vibration screen module for separating fine particles.

Beneficial effects: due to the adoption of the above-mentioned technical scheme, the present invention creates a reducing atmosphere in the air flotation sorting module and the air vibration screening module, and controls the temperature of the outflowing airflow by means of the autocoupling and air circulation power device to complete the strong Protective sieving of reductive carbon powder and metal powder keeps the sieved micro-particles to maintain their original physical and chemical properties. It can reliably realize the screening of easily oxidized micro-particles in a reducing atmosphere, and maintain the original physical and chemical characteristics. Through the reduction atmosphere self-coupling constant gas supply module, air flotation separation module and air vibration screening module are three components. Provide a stable reducing environment, temperature field and carrier gas for the operation of the device. Self-coupling constant air supply module using reducing atmosphere, air flotation sorting lower grid and dust sensor set in the integrated air flotation sorting module, flow controller and oscillating gas generator set in the gas shock screening module Signal feedback to complete independent pressure regulation, temperature regulation and flow regulation. The air flotation separation module and the air vibration screening module are provided with at least one reducing atmosphere self-coupling constant air supply module to provide a stable reducing environment and temperature field for the air flotation separation or air vibration screening module with carrier gas. In the air flotation separation module, according to the specific gravity and size of the particles, the raw materials are distributed in different layers of the air flotation separation module using the principle of buoyancy to achieve the first stage of separation. The vibrating screening module, through the joint action of high-frequency reciprocating gas oscillation and the screen, completes the screening of micro-particles with specific particle sizes. Due to the small mechanical friction during the sorting process, the environment can be kept in reducing atmosphere conditions, and the temperature can be controlled, etc., which can reliably screen easily oxidized particles and maintain the original physical and chemical properties. The sorting and conveying process adopts reducing atmosphere wind conveying, so as to realize the reducing atmosphere fine particle sorting of 20-20000 mesh with strong reducing carbon powder and metal powder. The utility model has the advantages of simple structure, strong reliability and good use effect, and has wide practicability in the technical field. The main advantages are as follows:

1) Realize the goal of reductive screening and prevent changes in the physicochemical properties of micro-particles due to oxidation;

2) Ensure that the particles will not experience severe mechanical friction during the screening process;

3) It can ensure the relative stability of the temperature of the sieved particles, prevent possible sharp temperature rise, and has the characteristics of cleaning, maintaining a reducing atmosphere, drying, and self-coupling balance of air pressure and airflow.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the reducing atmosphere fine particle sorting device of the present invention.

Fig. 2 is a working schematic diagram of air flotation sorting of the reducing atmosphere fine particle sorting device of the present invention.

Fig. 3 is a schematic diagram of the air flotation sorting finished material transported to the air vibration screening module of the present invention.

Fig. 4 is a schematic diagram of the working group of the gas vibrating sieve of the reducing atmosphere fine particle sorting device of the present invention.

Fig. 5 is a schematic diagram of the working group for conveying the air-oscillated and screened materials to the sorting particle receiver in the present invention.

In the figure: reducing atmosphere self-coupling constant air supply module-1, air flotation separation module-2, air vibration screening module-3, waste absorber-11, reducing atmosphere retainer-12, dryer- 13. Self-coupling and air circulation power unit-14, sorting cabin-20, first flow control group-21, upper grid for air flotation separation-22, lower grid for air flotation separation-23, dust sensor-24, Partition deflector-25, feeding air distribution port-26, sorting particle transmission channel-27, screening cabin-30, second flow controller-31, upper grid plate for air vibration screening-32, air vibration screening Lower grid plate-33, oscillating gas generator-34, sorting particle receiver-35.

specific implementation plan

The present invention will be further described below in conjunction with the embodiment in the accompanying drawings:

As shown in Figure 1, the reducing atmosphere microparticle sorting device of the present invention is mainly composed of three parts: reducing atmosphere self-coupling constant-state air supply module 1, air flotation sorting module 2, and air vibration screening module 3 , the reducing atmosphere self-coupling constant-state gas supply module 1 communicates with the air flotation sorting module 2 and the air vibration screening module 3 through the gas distribution pipe, and the outlet of the reducing atmosphere self-coupling constant-state gas supply module 1 They are respectively connected to the inlet of the air flotation separation module 2 and the inlet of the air vibration screening module 3, and the inlet of the reducing atmosphere self-coupling constant-state air supply module 1 is respectively connected to the outlet of the air flotation separation module 2 and the air vibration sieve The outlets of the sub-modules 3 are connected to each other; through the control of the reducing atmosphere self-coupling constant-state air supply module 1, the feed to the air flotation separation module 2 is completed and a constant flow of air is provided. Provide a stable reducing environment, temperature field and carrier gas for the operation; use the air flotation separation module 2 to screen the micro particles for the first time, and realize the first-level air flotation separation of the feed particle material through dynamic buoyancy control; after that , using the air vibration screening module 3 to use the high-frequency reciprocating airflow as a carrier to realize the secondary separation of the particles in the reducing atmosphere according to the set screening particle size for the particles after the primary air flotation separation.

The reducing atmosphere self-coupling constant-state gas supply module 1 includes a sequentially connected waste absorber 11, a reducing atmosphere retainer 12, a dryer 13, and an auto-coupling and gas cycle power device 14. Through the sequentially connected waste absorber 11, Reducing atmosphere retainer 12, dryer 13 and auto-coupling and gas cycle power unit 14 complete the removal of suspended particles, impurity gas, suspended liquid, temperature control and flow rate of reflux gas. The reducing atmosphere self-coupling constant gas supply module 1 uses the waste absorber 11 to remove the fine particles brought out by the air flow during the sorting process; the reducing atmosphere holder 12 absorbs and removes the oxidizing gas present in the return gas , to ensure the stability of the reducing gas atmosphere in the system; remove the liquid particles in the return gas through the drier 13 to ensure the dryness of the return gas; provide power for the return gas and control the gas temperature by means of the autocoupling and gas cycle power device 14 . The return gas is sent to the air flotation separation module 2 and the air vibration screening module 3 respectively.

The self-coupling and gas cycle power unit 14 includes a pressure regulating controller, a temperature controller and a gas flow rate controller connected in sequence. The reducing atmosphere self-coupling constant-state air supply module 1 includes the air flotation separation lower grid 23 and the dust sensor 24 set in the air flotation separation module 2, and the second control set in the air vibration screening module 3. The signal feedback from the flow device 31 and the oscillating gas generator 34 completes autonomous pressure regulation, temperature regulation and flow regulation. The reducing atmosphere self-coupling constant-state gas supply module 1 can be used in series with multiple reducing atmosphere self-coupling constant-state gas supply modules 1 according to the strictness and control requirements of the device for the reducing atmosphere.

The air flotation sorting module 2 includes a sorting cabin 20, a first flow control group 21, an upper grid 22 for air flotation, a lower grid 23 for air flotation, a dust sensor 24, a partition deflector 25, Feed air distribution port 26, sorting particle delivery channel 27; the first flow control group 21 is set on one side of the sorting cabin 20, and the partition deflector 25 is set on the other side of the sorting cabin 20 On one side, the partition deflector 25 is connected with the sorting particle conveying channel 27; The plates 23 are connected; the bottom of the sorting cabin 20 is provided with a feed air distribution port 26 connected to the reducing atmosphere self-coupling constant-state air supply module 1, and through the control of the air circulation power module 14, the air is supplied to the sorting cabin 20. Complete feeding and provide constant flow air flow; the top air outlet pipe of the sorting cabin 20 and the inlet pipe of the feed air distribution port 26 are respectively connected with the air distribution pipe, and the upper grid plate 22 of the air flotation separation and the air flotation separation The lower grid plates 23 are arranged at intervals in the sorting cabin 20, and the upper and lower sides of the upper grid plate 22 for air flotation separation and the lower grid plate 23 for air flotation separation are provided with dust sensors 24 for monitoring the amount of dust in their respective intervals; The positions of the air flotation separation upper grid plate 22 and the air flotation separation lower grid plate 23 can be adjusted up and down through the rails arranged on the side of the partition deflector 25, and the air flotation separation upper grid plate 22 can be closed independently The grid hole closes the upward airflow; the air flotation separation lower grid 23 on one side of the sorting cabin 20 and the air flotation separation lower grid 23 of the sorting particle transmission channel 27 operate synchronously, and the air flotation separation lower grid The plate 23 is driven by a servo motor to open and close the grid, cooperates with the self-coupling and air circulation power device 14 to provide a constant flow of gas, and forms a pulsed high voltage between the upper grid 22 of the air flotation separation and the lower grid 23 of the air flotation separation The air flow improves the transmission efficiency of the air flotation separation module 2 for sorting fine particles; the air flotation separation lower grid plate 23 on the side of the separation particle transmission channel 27 acts as a flow guide to block the downward flow of gas.

As shown in Figure 2, the first flow control group 21 is composed of a plurality of column arrangements, and each column can slide in the sorting cabin under the drive of a servo motor. The position of the column can change the cross-sectional area of any different cross-section of the sorting cabin 20, and then change the gas flow velocity of the cross-section to form different buoyancy zones. The belt sorting particles are distributed under different sections according to the density and particle size to realize air flotation sorting.

As shown in Figure 3, when the air flotation separation is stable, the air flotation separation of the upper grid 22 of the air flotation, the lower grid 23 of the air flotation on the side of the sorting cabin 20 and the air flotation of the sorting particle delivery channel 27 Select the lower grid plate 23 to slide to the top and bottom of the particle layer to be collected in synchronous action, and the flow control group 21 above the upper grid plate 22 of air flotation separation shrinks inward, further increasing the air velocity above the upper grid plate 22 of air flotation separation , so that the upper microparticles are taken out of the sorting chamber 20 through the backflow of the air flow; the flow control group 21 under the lower grid plate 23 of the air flotation separation moves outwards, reducing the air velocity under the lower grid plate 23 of the air flotation separation, so that the lower micro particles The particles settle down; these two areas act until the dust sensor 24 located above the upper grid plate 22 of the air flotation separation and below the lower grid plate 23 of the air flotation separation gives a clearing complete signal. If the dust sensor 24 above the upper grid plate 22 of the air flotation separation does not give a clearing completion signal within the set time, the reducing atmosphere self-coupling constant air supply module 1 cooperates with the action of the upper grid plate 22 of the air flotation separation to increase the air supply flow, Improve the cleaning ability; when the reducing atmosphere self-coupling constant air supply module 1 increases the air supply flow, the flow control group 21 under the lower grid plate 23 of the air flotation separation will follow the action to ensure that the buoyancy of this area remains unchanged.

When the dust sensor 24 above the upper grid plate 22 of the air flotation separation and below the lower grid plate 23 of the air flotation separation gives a clearing signal, the upper grid plate 22 of the air flotation separation is closed; Composed of flow sheets, each flow guide sheet can open the flow guide sheet between the upper grid plate 22 of air flotation separation and the lower grid plate 23 of air flotation separation in different regions under the control of the servo motor, and the separation cabin 20 and the separation chamber are connected. Particle transmission channel 27, so that the air flow is discharged from the top of the sorting cabin 20 instead of being discharged from the sorting particle transmission channel 27; the upper grid plate 22 of the air flotation separation closes the grid hole, and the upward airflow is closed; the lower grid of the air flotation separation The plate 23 is driven by a servo motor to open and close the grid, cooperates with the self-coupling and air circulation power device 14 to provide a constant flow of gas, and forms a pulsed high pressure between the upper grid 2 of the air flotation separation and the lower grid 23 of the air flotation separation The air flow improves the transmission efficiency of the air flotation separation module 2 for sorting fine particles; the air flotation separation lower grid plate 23 on the side of the separation particle transmission channel 27 acts as a flow guide to block the downward flow of gas. During this process, the dust sensor 24 strictly monitors the dust content above and below the lower grid plate 23 for air flotation separation. If the sensor under the lower grid plate 23 of air flotation separation detects that the dust concentration has risen, the reducing atmosphere self-coupling constant air supply module 1 cooperates with the lower grid plate 23 of air flotation separation to reduce the dust concentration below the lower grid plate 23 of air flotation separation. Gas flow rate, control dust floating.

As shown in Figure 4, the gas vibration screening module 3 includes a screening cabin 30, a second flow controller 31, an upper grid plate 32 for gas vibration screening, a lower grid plate 33 for gas vibration screening, and a vibration gas generator 34 , the sorting particle receiver 35; the oscillating gas generator 34 is respectively connected with the reducing atmosphere self-coupling constant-state gas supply module 1, the upper and lower flow gas distribution pipes of the screening cabin 30 and the sorting particle receiver 35 connecting pipes, respectively Provide oscillating airflow for the air vibration screening module 3; the air vibration screening upper grid plate 32 and the air vibration screening lower grid plate 33 are arranged at intervals in the upper and lower side walls of the sorting cabin 30, according to the air vibration screening The difference in mesh size between the upper grid plate and the lower grid plate for air vibration screening completes the screening of the particles to be screened.

As shown in Figure 5, the second flow controller 31 is arranged on one side of the screening cabin 30, and can slide in the screening cabin 30 through the control of the servo motor, changing the cross-sectional area of the screening cabin 30 control section area; The sorting particle receiver 35 and the second flow controller 31 are symmetrically arranged to realize the collection of the particles after screening; the upper grid plate 32 of the air vibration screening and the lower grid plate 33 of the air vibration screening are respectively independently implemented. The opening and closing action, the gas vibration screening lower grid plate 33 grid closing action is linked with the vibration gas generator 34 action, so that the gas vibration screening module 3 enters the micro particle transmission mode from the screening mode; the gas vibration screening upper grid plate 32 is driven by a servo motor to open and close the grid, cooperates with the self-coupling and gas cycle power device 14 to provide a constant flow of gas, and forms a pulsed high-pressure air flow between the upper grid 32 of the gas vibration screen and the lower grid 33 of the gas vibration screen , improve the transmission efficiency of the air vibration sieve module 3 for sorting the micro-particles, and transmit the sieved micro-particles to the sorting particle receiver 35 to complete the action.

Claims (7)

1. A reducing atmosphere microparticle sorting device, characterized in that: the device includes a reducing atmosphere self-coupling constant-state air supply module (1), an air flotation sorting module (2), an air vibration screening module (3 ) three components, the reduction atmosphere self-coupling constant-state gas supply module (1) is connected with the air flotation separation module (2) and the air vibration screening module (3) through the gas distribution pipe, and the reduction The control of the atmosphere self-coupling constant-state gas supply module (1) completes the feeding into the air flotation separation module (2) and provides a constant flow of air, providing a stable reducing environment, temperature field and carrier gas for operation ; use the air flotation sorting module (2) to screen the micro particles for the first time, and realize the first-level air flotation sorting of the feed particle material through dynamic buoyancy control; after that, use the air shock screening module (3) to high The frequent reciprocating airflow is used as the carrier, and the particles after the primary air flotation sorting are realized according to the set sieving particle size to achieve the secondary sorting of the reducing atmosphere micro-particles. 2. A reducing atmosphere microparticle sorting device according to claim 1, characterized in that: said reducing atmosphere self-coupling constant-state gas supply module (1) comprises sequentially connected waste absorbers (11), Reducing atmosphere retainer (12), drier (13) and self-coupling and gas circulation power unit (14), through the waste absorber (11), reducing atmosphere retainer (12), drier (13) and automatic The coupled gas circulation power device (14) completes the removal of suspended particles, impurity gas, suspended liquid, temperature control and flow rate of the return gas. 3. A kind of reducing atmosphere fine particle sorting device according to claim 2, is characterized in that: described self-coupling and gas circulation power unit (14) comprises the pressure regulating controller, temperature controller and gas flow rate that are connected in sequence controller. 4. A reducing atmosphere microparticle sorting device according to claim 1, characterized in that: the air flotation sorting module (2) includes a sorting cabin (20), a first flow control group (21) , Air flotation separation upper grid plate (22), air flotation separation lower grid plate (23), dust sensor (24), partition deflector (25), feed air distribution port (26), sorting particle transmission Channel (27); the first flow control group (21) is arranged on one side in the sorting cabin (20), and the partition deflector (25) is arranged on the other side in the sorting cabin (20) On the side, the partition deflector (25) is connected with the sorting particle transmission channel (27); the partition deflector (25) is provided with a track near the side of the sorting cabin (20), and is connected with the upper grid plate ( 22), the lower grid plate (23) of the air flotation separation is connected; the bottom of the sorting cabin (20) is provided with a feed gas distribution port (26) connected to the reducing atmosphere self-coupling constant-state air supply module (1) ), through the control of self-coupling and air circulation power unit (14), complete feeding and provide constant flow airflow in the sorting cabin (20); the top air outlet pipe and the feed distribution air port (26 ) inlet pipes are respectively connected with the gas distribution pipes, the air flotation separation upper grid (22) and the air flotation separation lower grid (23) are arranged in the sorting cabin (20) at intervals, and the air flotation separation Select the upper and lower sides of the upper grid (22) and the lower of the air flotation separation grid (23) to be provided with dust sensors (24) for monitoring the dust amount in respective intervals; the air flotation separation upper grid ( 22) and the position of the lower grid plate (23) of the air flotation separation can be adjusted up and down through the track arranged on the side of the partition deflector (25), and the upper grid plate (22) of the air flotation separation can independently close the grid hole , to close the upward airflow; the lower grid plate (23) of the air flotation separation on one side of the sorting cabin (20) and the lower grid plate (23) of the air flotation separation of the sorting particle transmission channel (27) act synchronously, and the air The lower grid plate (23) of flotation separation is driven by a servo motor to open and close the grid plate, and cooperates with the self-coupling and air circulation power device (14) to provide constant flow of gas. In the air flotation separation, the upper grid plate (22) and the air flotation A pulsed high-pressure airflow is formed between the lower grid plates (23) in the separation to improve the transmission efficiency of the air flotation separation module (2) for sorting fine particles; The lower grid plate (23) acts as a flow guide and is used to block the downward flow of gas. 5. A kind of reducing atmosphere microparticle sorting device according to claim 4, characterized in that: the first flow control group (21) is composed of a plurality of columns, and each column is driven by a servo motor. The utility model can slide in the sorting cabin, and the cross-sectional area of any different section of the sorting cabin (20) can be changed by changing the positions of a plurality of columns in the first flow control group (21). 6. A reducing atmosphere particle sorting device according to claim 4, characterized in that: the partition deflector (25) is composed of a plurality of deflectors, and each deflector is controlled by a servo motor. The lower energy section opens the deflector between the upper grid plate (22) and the lower grid plate (23) of air flotation separation, and communicates with the sorting cabin (20) and the sorting particle transmission channel (27). 7. The device for sorting microparticles in reducing atmosphere according to claim 1, characterized in that: the air vibration screening module (3) includes a screening cabin (30), a second flow controller (31), Gas vibration and screening upper grid (32), gas vibration and screening lower grid (33), vibration gas generator (34), sorting particle receiver (35); the second flow controller (31) It is located on one side of the screening cabin (30), and can slide into the screening cabin (30) through the control of the servo motor, changing the cross-sectional area of the control section area of the screening cabin (30); the upper grid plate ( 32) The lower grid plate (33) and the gas vibration screening are arranged at intervals in the upper and lower side walls of the sorting cabin (30), and the mesh size of the sieve assembled according to the upper grid plate of the gas vibration screening and the lower grid plate of the gas vibration screening difference to complete the screening of the particles to be screened; the oscillating gas generator (34) is respectively self-coupled with the reducing atmosphere to the constant gas supply module (1), the upper and lower flow air distribution pipes of the screening cabin (30) and the sorting particles The receiver (35) is connected with the connecting pipe to provide the oscillating airflow for the air-oscillating screening module (3); the sorting particle receiver (35) is arranged symmetrically with the second flow controller (31), so that after sieving The collection of particles; the air vibration screening upper grid (32) and the gas vibration screening lower grid (33) independently perform the opening and closing action of the grid, and the gas vibration screening lower grid (33) grid The closing action is linked to the closing action of the oscillating gas generator (34), so that the air oscillating screening module (3) enters the micro particle transmission mode from the screening mode, and the upper grid plate (32) of the gas oscillating screening is driven by a servo motor to execute the grid plate The opening and closing of the air-coupling and gas circulation power device (14) provide constant flow gas cooperation, forming a pulsed high-pressure airflow between the upper grid plate (32) of the gas vibration screening and the lower grid plate (33) of the gas vibration screening, improving the The transmission efficiency of the gas vibration sieve module (3) for sorting fine particles.

Images