Nanometer silicon powder plasma preparation system

Abstract

The utility model discloses a nano silicon powder plasma preparation system, relates to the field of nano silicon powder preparation, and solves the problems of low preparation efficiency and low practicability due to the fact that an existing device needs to use open fire to heat up, and adopts the following scheme that the nano silicon powder plasma preparation system comprises a spheroidizing furnace body, a plasma torch system and a feeding system are fixedly mounted at the top of the spheroidizing furnace body, and a receiving system is fixedly mounted at the bottom of the spheroidizing furnace body; the plasma torch system is composed of three torches inclining inwards in the same direction. A main body of the feeding system is a spiral feeder, and the tail end of the spiral feeder is fixedly connected to a trough in the top of the spheroidizing furnace body; a main body of the material receiving system is a ceramic filter; according to the nano silicon powder plasma preparation system, through the arrangement of the device, electric energy can be directly converted into fluid heat energy by utilizing a plasma torch system, convection heat exchange is carried out through plasma high-temperature flame flow and high-melting-point particles, the surfaces of the particles are melted, and the technology that the particles have regular spheres is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of nano silicon powder preparation, in particular to a nano silicon powder plasma preparation system. Background Art

[0002] In the process of producing quartz powder, quartz powder particles of different sizes will be produced. In particular, the quartz powder below 200 mesh has irregular particle size and shape. If it can be spheroidized, its added value is high and has good application scenarios;

[0003] After searching, the application with patent number CN202022036543.2 discloses a nano-silicon powder plasma preparation device, including a bottom plate, a bracket, two fixed blocks and a drive motor are installed on the top of the bottom plate, a ball mill is installed between the two fixed blocks, one end of the ball mill is fixedly connected to the output shaft of the drive motor, a grinding barrel is installed on the top of the bracket, and a funnel is installed at the bottom of the grinding barrel;

[0004] The above application document realizes the preparation of nano powder by setting up a grinding component, but adopts furnace heating and subsequent preparation, and the open flame preparation has low efficiency and low practicality.

[0005] Therefore, we proposed a nano-silicon powder plasma preparation system. Utility Model Content

[0006] In view of the shortcomings of the prior art, the utility model provides a nano silicon powder plasma preparation system, which solves the problem that the existing device needs to use open flame to heat up the preparation, has low efficiency and low practicality.

[0007] To achieve the above objectives, the utility model is implemented through the following technical solutions: a nano silicon powder plasma preparation system, comprising a spheroidizing furnace body, a plasma torch system and a feeding system are fixedly installed on the top of the spheroidizing furnace body, and a receiving system is fixedly installed on the bottom of the spheroidizing furnace body;

[0008] The plasma torch system consists of three sets of torches tilted inwards in the same direction;

[0009] The main body of the feeding system is a screw feeder, and the tail end of the screw feeder is fixedly connected to the material trough on the top of the spheroidizing furnace body;

[0010] The main body of the material collecting system is a ceramic filter.

[0011] Preferably, the ceramic filter is composed of a porous body having two end faces and an outer peripheral surface, and having a plurality of main flow paths of the purified fluid extending from one end face to another end face separated by partition walls, and a filter membrane arranged on the inner wall surface of the main flow path;

[0012] Among them, the fluid flows into the main flow path through an opening on one end face side, and the purified fluid passes through the filter membrane and the interior of the porous body to be purified, and is taken out from the outer peripheral surface of the porous body as a purified fluid, or flows in through the outer peripheral surface of the porous body, and the purified fluid passes through the interior of the porous body and the filter membrane to be purified, and is taken out from at least one opening on the end face side of the main flow path as a purified fluid; finally, the spheroidized powder is separated into gas and solid, and the spheroidized powder is intermittently purged by a back-purge system, and the powder is collected at the bottom and discharged regularly.

[0013] Preferably, the spheroidizing furnace body is composed of an inner furnace wall and an outer furnace wall, a spiral water groove is provided on the outer wall of the inner furnace wall, and a cooling water circulation system connected to the spiral water groove is provided on the outer wall of the spheroidizing furnace body;

[0014] Among them, the setting of the spheroidizing furnace body can ensure the contact area between the inner spiral water flow and its side wall, and repeated contact can ensure the subsequent cooling effect.

[0015] Preferably, the main body of the cooling water circulation system is set as a cold water tank, the cold water tank is connected to the cooling tower, the top and bottom sides of the cold water tank are connected to the two ends of the water tank in the spheroidizing furnace body through two groups of pipes, and a water pump group is fixedly installed on the outer wall of the cold water tank;

[0016] Among them, in order to ensure reliable cooling inside the plasma generator, the generator cooling water inlet pressure and flow rate should be guaranteed, the inlet pressure is greater than 0.7MPa, and the cooling water flow rate of a single generator is 5t / h. The spheroidizing furnace is water-cooled, the inlet pressure is greater than 0.8MPa, and the cooling water flow rate is required to be 10t / h. Each cooling water inlet pipeline is equipped with a flow switch, and the flow rate satisfaction signal is sent to the control system DCS;

[0017] In addition, cooling water has requirements for water quality and should meet the technical standards for primary desalted water. If the cooling water does not meet the standards, especially if the conductivity and hardness are too high, it will cause the cooling water resistance value between the anode and cathode of the generator to be too low, affecting the insulation and cooling between the anode and cathode, which is not conducive to the arcing operation of the plasma generator and will also affect the service life of the anode and cathode of the generator.

[0018] The cooling water uses a deionized water system to prepare deionized water, which enters the cooling water tank of 3m3 (3m×2m×1.5m). Deionized water is filtered by circulation. A centrifugal water pump is arranged at the outlet of the water tank.

[0019] The outlet of the water pump passes through the water flow meter, and the cooling water is sent to the plasma generator and the protective water jacket. The return water returns to the counter-flow cooling tower for cooling and then returns to the water tank. One water pump is used and the other is reserved.

[0020] Main parameters of the water pump: flow rate: 32m3 / h; head: 102m; rated power: 15kw.

[0021] Preferably, a compressed gas system is further provided on the outer side of the spheroidizing furnace body, the main body of the compressed gas system is a screw air compressor, and the output end of the screw air compressor is connected to the inner cavity of the spheroidizing furnace body;

[0022] Among them, the main function of the compressed gas system is to provide the carrier gas required for the operation of the plasma torch and to form an inert protective atmosphere in the spheroidizing furnace. The compressed air produced by the screw air compressor enters the compressed air process tank for buffering, voltage stabilization, cooling, and water removal, and then enters the C-level oil-water separator to filter out large volumes of water, oil, and dust, and then enters the high-temperature air-cooled refrigerated dryer, and then enters the T-level main line filter, the A-level oil mist filter, deeply adsorbs water molecules, and then passes through the activated carbon filter for deep oil removal, and finally the clean air is sent to the air buffer dry tank. The nitrogen production device uses the pressure change of compressed air and carbon molecular sieve to physically filter and adsorb to obtain qualified nitrogen, and then sends it to the nitrogen buffer tank for storage and standby. After the nitrogen is dusted and filtered, it is purified and automatically discharged to the atmosphere after inspection. If it is unqualified, it will be automatically sent to the subsequent pipeline system after it is qualified. The subsequent pipeline system distributes gas at each point according to the difference in gas consumption and the need for adjustment of different equipment, including plasma carrier gas, sealing gas at various locations, temperature regulating gas, etc.

[0023] The compressed gas system mainly includes air compressor, dry cooler, four-stage filter, nitrogen generator, air tank and nitrogen tank.

[0024] Air compressors produce compressed air. Part of the compressed air is used for purging, afterburning, atomization, etc.

[0025] The main parameters of the air compressor:

[0026] Quantity: 2 sets; Type: air-cooled, screw, direct-connected, industrial frequency; Rated exhaust pressure: 0.8MPa (relative pressure); Gas output: 450Nm3 / h; Power: 5kW.

[0027] The dry cooler is mainly used to remove moisture from the compressed air. After the compressed air is treated by the dry cooler, its pressure dew point temperature reaches 1.7℃ (equivalent to the atmospheric dew point temperature of -23.3℃).

[0028] The four-stage filter is a C / T / A / H four-stage filter used to filter water, oil and dust in compressed air.

[0029] The nitrogen generator adopts a pressure swing adsorption nitrogen making device, uses high-quality carbon molecular sieve as adsorbent, and uses the pressure swing adsorption principle at room temperature to separate air to produce high-purity nitrogen.

[0030] Main parameters of nitrogen generator:

[0031] Quantity: 2 sets; Nitrogen purity: >99%; Nitrogen pressure: 0.6MPa; Outlet oxygen content: <0.5%

[0032] Gas production: 300Nm3 / h; air tanks and nitrogen tanks are mainly used for buffering and storing air and nitrogen.

[0033] Preferably, an electrical master controller is provided on the outer side of the spheroidizing furnace body, and the electrical master control cabinet is connected to the computer terminal;

[0034] The data of each subsystem enters the main control cabinet, which integrates it and then connects it to the computer. The computer realizes automatic continuous production and process monitoring.

[0035] The utility model provides a nano silicon powder plasma preparation system, which has the following beneficial effects:

[0036] 1. The nano silicon powder plasma preparation system can directly convert electrical energy into fluid thermal energy through the setting of the device, and use the plasma torch system to conduct convection heat exchange with high melting point particles through the plasma high temperature flame flow to melt their surface and make them have regular spherical technology, thereby achieving the effect of efficient preparation, solving the problem that the existing device needs to use open flame heating preparation with low efficiency and low practicality;

[0037] 2. The nano-silicon powder plasma preparation system can ensure the cooling effect of its inner cavity and the subsequent preparation effect of nano-silicon powder through the setting of the cooling water circulation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the structure of the utility model;

[0039] Figure 2 It is a schematic diagram of the structure of the utility model from the side;

[0040] Figure 3 It is a structural schematic diagram of the feeding system of the utility model;

[0041] Figure 4 It is a structural schematic diagram of the spheroidizing furnace of the utility model.

[0042] In the figure: 1. Spheroidizing furnace; 2. Plasma torch system; 3. Feeding system; 4. Cooling water circulation system; 5. Receiving system. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0044] Embodiment 1:

[0045] A nano silicon powder plasma preparation system comprises a spheroidizing furnace body 1, a plasma torch system 2 and a feeding system 3 are fixedly installed on the top of the spheroidizing furnace body 1, and a receiving system 5 is fixedly installed on the bottom of the spheroidizing furnace body 1; the plasma torch system 2 is composed of three sets of torches inclined inward in the same direction; the main body of the feeding system 3 is a screw feeder, and the tail end of the screw feeder is fixedly connected to the material trough on the top of the spheroidizing furnace body 1; the main body of the receiving system 5 is a ceramic filter;

[0046] Among them, the nano silicon powder plasma preparation system, through the setting of the device, can use the plasma torch system 2 to directly convert electrical energy into fluid thermal energy, and use the plasma high-temperature flame flow to conduct convection heat exchange with high-melting-point particles to melt their surface and make them have a regular spherical shape, thereby achieving efficient preparation effects and solving the problem that the existing devices need to use open flames to heat up the preparation, which has low efficiency and low practicality.

[0047] Embodiment 2:

[0048] The ceramic filter is composed of a porous body having two end faces and an outer peripheral face, separated by partitions to form a plurality of main flow paths of the purified fluid running from one end face to the other end face, and a filter membrane arranged on the inner wall surface of the main flow path; wherein, the purified fluid flows into the main flow path through an opening on one end face side, and is purified by passing through the filter membrane and the interior of the porous body, and is taken out from the outer peripheral face of the porous body as a purified fluid, or flows in through the outer peripheral face of the porous body, and is purified by passing through the interior of the porous body and the filter membrane, and is taken out from the opening on at least one end face side of the main flow path as a purified fluid; finally, the spheroidized powder is separated into gas and solid, and the spheroidized powder is intermittently purged by a back-purge system, and the powder is collected at the bottom and discharged regularly.

[0049] The spheroidizing furnace body 1 is composed of an inner furnace wall and an outer furnace wall. A spiral water trough is provided on the outer wall of the inner furnace wall, and a cooling water circulation system 4 connected to the spiral water trough is provided on the outer wall of the spheroidizing furnace body 1. The setting of the spheroidizing furnace body 1 can ensure the contact area between the inner spiral water flow and its side wall, and repeated contact can ensure the subsequent cooling effect.

[0050] The main body of the cooling water circulation system 4 is configured as a cold water tank, which is connected to a cooling water tower. The top and bottom sides of the cold water tank are connected to the two ends of the water tank in the spheroidizing furnace body 1 through two groups of pipes, and a water pump group is fixedly installed on the outer wall of the cold water tank; wherein, in order to ensure reliable cooling inside the plasma generator, the generator cooling water inlet pressure and flow rate should be guaranteed, the inlet pressure is greater than 0.7MPa, and the cooling water flow rate of a single generator is 5t / h. The spheroidizing furnace is water-cooled, the inlet pressure is greater than 0.8MPa, and the cooling water flow rate is required to be 10t / h. Each cooling water inlet pipeline is equipped with a flow switch, and the flow satisfaction signal is sent to the control system DCS;

[0051] In addition, cooling water has requirements for water quality and should meet the technical standards for primary desalted water. If the cooling water does not meet the standards, especially if the conductivity and hardness are too high, it will cause the cooling water resistance value between the anode and cathode of the generator to be too low, affecting the insulation and cooling between the anode and cathode, which is not conducive to the arcing operation of the plasma generator and will also affect the service life of the anode and cathode of the generator.

[0052] The cooling water uses a deionized water system to prepare deionized water, which enters the cooling water tank of 3m3 (3m×2m×1.5m). Deionized water is filtered by circulation. A centrifugal water pump is arranged at the outlet of the water tank.

[0053] The outlet of the water pump passes through the water flow meter, and the cooling water is sent to the plasma generator and the protective water jacket. The return water returns to the counter-flow cooling tower for cooling and then returns to the water tank. One water pump is used and the other is reserved.

[0054] Main parameters of the water pump: flow rate: 32m3 / h; head: 102m; rated power: 15kw.

[0055] A compressed gas system is also provided on the outside of the spheroidizing furnace body 1. The main body of the compressed gas system is a screw air compressor, and the output end of the screw air compressor is connected to the inner cavity of the spheroidizing furnace body 1; wherein, the main function of the compressed gas system is to provide the carrier gas required for the operation of the plasma torch and to form an inert protective atmosphere in the spheroidizing furnace. The compressed air produced by the screw air compressor enters the compressed air process tank for buffering, voltage stabilization, cooling, and water removal, and then enters the C-class oil-water separator to filter out large volumes of water, oil, and dust, and then enters the high-temperature air-cooled refrigerated dryer, and then enters the T-class main line filter and the A-class oil mist filter to deeply adsorb water molecules, and then passes through the activated carbon filter for deep oil removal, and finally the clean air is sent to the air buffer dry tank. The nitrogen production device uses the pressure change of compressed air and carbon molecular sieve to physically filter and adsorb to obtain qualified nitrogen, and then sends it to the nitrogen buffer tank for storage and standby. After the nitrogen is dusted and filtered, it is purified and automatically discharged to the atmosphere if it is unqualified after inspection; if it is qualified, it is automatically sent to the subsequent pipeline system. The subsequent pipeline system distributes gas to each point according to the different gas consumption and adjustment needs of different equipment, including plasma carrier gas, sealing gas, temperature control gas, etc.

[0056] The compressed gas system mainly includes air compressor, dry cooler, four-stage filter, nitrogen generator, air tank and nitrogen tank.

[0057] Air compressors produce compressed air. Part of the compressed air is used for purging, afterburning, atomization, etc.

[0058] The main parameters of the air compressor:

[0059] Quantity: 2 sets; Type: air-cooled, screw, direct-connected, industrial frequency; Rated exhaust pressure: 0.8MPa relative pressure; Gas output: 450Nm3 / h; Power: 5kW.

[0060] The dry cooler is mainly used to remove moisture from the compressed air. After the compressed air is treated by the dry cooler, its pressure dew point temperature reaches 1.7℃, which is equivalent to the atmospheric dew point temperature of -23.3℃.

[0061] The four-stage filter is a C / T / A / H four-stage filter used to filter water, oil and dust in compressed air.

[0062] The nitrogen generator adopts a pressure swing adsorption nitrogen making device, uses high-quality carbon molecular sieve as adsorbent, and uses the pressure swing adsorption principle at room temperature to separate air to produce high-purity nitrogen.

[0063] Main parameters of nitrogen generator:

[0064] Quantity: 2 sets; Nitrogen purity: >99%; Nitrogen pressure: 0.6MPa; Outlet oxygen content: <0.5%;

[0065] Gas production: 300Nm3 / h; air tanks and nitrogen tanks are mainly used for buffering and storing air and nitrogen.

[0066] An electrical master controller is provided on the outside of the spheroidizing furnace body 1, and the electrical master control cabinet is connected to the computer terminal; wherein, the data of each subsystem enters the master control cabinet, which is integrated and then connected to the computer. Automatic continuous production and process monitoring are realized through the computer.

[0067] In addition, the nano-silicon powder plasma preparation system can ensure the cooling effect of the inner cavity thereof and the subsequent preparation effect of nano-silicon powder by setting up the cooling water circulation system 4.

[0068] The working principle and use process of the utility model are as follows: when the device is required to work, the material is transferred from the top to the inside of the spheroidizing furnace body 1 by the feeding system 3, and then the plasma torch system 2 is turned on to perform plasma heating and nano-silicon powder preparation on the material in the spheroidizing furnace body 1 on the bottom side to ensure the preparation effect.

[0069] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0070] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A nano silicon powder plasma preparation system, characterized in that: It comprises a spheroidizing furnace body (1), a plasma torch system (2) and a feeding system (3) are fixedly installed on the top of the spheroidizing furnace body (1), and a collecting system (5) is fixedly installed on the bottom of the spheroidizing furnace body (1); The plasma torch system (2) is composed of three sets of torches inclined inward in the same direction; The main body of the feeding system (3) is a screw feeder, and the tail end of the screw feeder is fixedly connected to the material trough at the top of the spheroidizing furnace body (1); The main body of the material collection system (5) is a ceramic filter.

2. A nano silicon powder plasma preparation system according to claim 1, characterized in that: The ceramic filter is composed of a porous body having two end faces and an outer peripheral face, with multiple main flow paths of the purified fluid extending from one end face to the other end face separated by partition walls, and a filter membrane arranged on the inner wall surface of the main flow path.

3. The nano silicon powder plasma preparation system according to claim 1, characterized in that: The spheroidizing furnace body (1) is composed of an inner furnace wall and an outer furnace wall. A spiral water groove is provided on the outer wall of the inner furnace wall. A cooling water circulation system (4) connected to the spiral water groove is provided on the outer wall of the spheroidizing furnace body (1).

4. A nano-silicon powder plasma preparation system according to claim 3, characterized in that: The main body of the cooling water circulation system (4) is configured as a cold water tank, which is connected to a cooling water tower. The top and bottom sides of the cold water tank are connected to the two ends of a water tank in the spheroidizing furnace body (1) via two groups of pipes, and a water pump group is fixedly mounted on the outer wall of the cold water tank.

5. The nano-silicon powder plasma preparation system according to claim 1, characterized in that: A compressed gas system is also provided on the outside of the spheroidizing furnace body (1); the main body of the compressed gas system is a screw air compressor, and the output end of the screw air compressor is connected to the inner cavity of the spheroidizing furnace body (1).

6. The nano-silicon powder plasma preparation system according to claim 1, characterized in that: An electrical master controller is arranged on the outside of the spheroidizing furnace body (1), and the electrical master control cabinet is connected to a computer terminal.

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