CN209631144U - A kind of high temperature transferred arc Granulation Equipments of Buddha's warrior attendant wire cutting silicon powder - Google Patents
A kind of high temperature transferred arc Granulation Equipments of Buddha's warrior attendant wire cutting silicon powder Download PDFInfo
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- CN209631144U CN209631144U CN201821758756.2U CN201821758756U CN209631144U CN 209631144 U CN209631144 U CN 209631144U CN 201821758756 U CN201821758756 U CN 201821758756U CN 209631144 U CN209631144 U CN 209631144U
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Abstract
The utility model relates to waste recovery fields, it is proposed a kind of high temperature transferred arc Granulation Equipments of Buddha's warrior attendant wire cutting silicon powder, including powder pretreatment unit, exhaust treatment system and direct current transferred arc prilling granulator, powder pretreatment unit includes crushing device and thermal chamber, the feed inlet of the discharge port connection thermal chamber of crushing device, the discharge port of thermal chamber are connect by conveying device with direct current transferred arc prilling granulator；Direct current transferred arc prilling granulator includes DC power supply and water-cooling cover, negative electrode and rotary annular water-cooled copper platform are provided in water-cooling cover, the cathode of negative electrode connection DC power supply, annular water-cooled copper platform connects the anode of DC power supply by positive brush, annular water-cooled copper platform is set to the lower section of negative electrode, and the bottom of water-cooling cover is provided with silicon ball discharge port；Exhaust treatment system includes inert gas transfer pipeline and exhaust gas processing device.The utility model can realize the continuous production of small size silicon ball, yield > 95% of silicon.
Description
Technical field
The utility model relates to waste recovery fields, and in particular to a kind of Granulation Equipments of Buddha's warrior attendant wire cutting silicon powder.
Background technique
The fossil energy contained in the earth is limited, and a large amount of combusts fossil energy will cause very serious environmental pollution,
Therefore fossil energy will can gradually be replaced in the raw energy in future.Solar energy is exactly one of which, due to its resource distribution
It is relatively wide, as long as the place for having sunlight to irradiate can be carried out photo-thermal and photoelectric conversion.Solar photovoltaic industry developed in recent years
Rapidly have become one of rising industry fast-developing steadily in worldwide.Wherein, crystal silicon solar batteries are always
The occupation rate of market that remain 90% or more is undisputed mainstream technology.Therefore, demand of the future to polysilicon will
It is increasing.Currently, crystal silicon solar batteries mainly use Buddha's warrior attendant wire cutting tabletting technology, since there are joint-cutting losses, only
2018, the yield of silicon powder waste material siccative was just up to 13.6~140,000 tons.Due to the quantity cumulative year after year, and purposes exploitation compared with
Few, a large amount of waste from stacking causes very serious environmental pollution and the wasting of resources, is badly in need of exploitation and is suitble to the big of material application
Scale processing technique.
Due to the substantial amounts of silicon powder waste material, general processing method is difficult the so more amount of consumption, therefore people are earliest
Want to carry out industrial silicon manufacture to the waste material using traditional smelting mode.According to investigations, it industrially attempted to silicon powder waste material diameter
Induction melting is carried out, but since Buddha's warrior attendant wire cutting silicon powder is thinner, generally less than 0.5 μm, induction melting temperature is lower in addition, In
Irreversible chemical reaction easily occurs with carbon atmosphere etc. for superfine silica powder during melting, therefore general yield is no more than
70%.Wherein there are one very important the disadvantage is that the filling rate of silicon powder is very low, since silicon powder surface is attached with organic addition
Agent, the silicon powder after drying is more fluffy, and stacking density is generally 0.3 g/cm3, actual charging efficiency is no more than 10%.Consider
To the consumption of crucible, this mode economic feasibility is poor, therefore there is no expanded.Another way is slag making melting, is lacked
Point is still that yield is lower, and due to the problem of oxidation during filler, yield is general less than 60%, and can introduce a large amount of
Slag agent impurity.In recent years, the recycling research for being directed to Buddha's warrior attendant wire cutting silicon powder waste material is in the trend of cumulative year after year, Cong Yifa
It is seen on the document of table, specifically includes that hot plasma melting, induction melting, ball milling directly prepare solar energy at nano particle system
Battery, bromine hydrogenation and aerosol reaction etc..The necessary theoretical branch of application and the offer of silicon powder has been widened in these researchs of forefathers
Support, but be not dedicated to fundamentally solving the practical problem of current silicon powder waste recovery.
There are two types of the modes for solving the high yield of silicon powder melting, and one kind is to ensure that in fusion process in gas medium easily and silicon
The bias of the substance of reaction is less than absolute numerical value, and silicon is made to avoid that serious chemical reaction occurs in slow temperature-rise period.
Second is the energy density and heating rate for trying every possible means to improve heating method, so that silicon powder is realized thawing in a short time, makes silicon
Powder is melted into rapidly silico briquette under the premise of not having enough time occurring severe reaction.Wherein first way is relatively difficult to achieve, such as
Realize that lower vacuum degree generally requires to vacuumize equipment, a large amount of superfine powder is handled in a vacuum, is held very much
It easily splashes, and is unfavorable for realizing Continuous maching processing.Melt-through process is also unfavorable for the timely discharge of impurity.Therefore,
The second way has absolute advantage in processing superfine silica powder, and instantaneous melt characteristic, melts as brought by high-energy density
Oxygen content is required during change and insensitive, therefore, whole operation can carry out in air, have to realization continuous production
Very big help.Currently, can provide there are mainly three types of the heating methods of high-energy density, electron beam, laser and high temperature etc.
Gas ions.Wherein, electron beam needs are run under stringent vacuum condition, are used primarily in high pure metal removal effumability impurity
It is further purification on, the powder high for melting superfine powder and impurity content is substantially impossible.Laser exists
It once mentioned, had for melting powder in an atmosphere absolute excellent in the patent of CN107445170A and CN107324340A
Gesture is the inevitable direction of future development, but costly due to price at this stage, and critical component cannot domesticize, and make
It obtains in its industry that can not be directly thrown into silicon powder waste disposal in a short time.Non-diverting arc process equipment cost is higher,
And it is larger to the loss of negative electrode material in fusion process.
Utility model content
To solve problems of the prior art, direct current transferred arc granulating technique is introduced by the utility model for the first time
In powder handling process, and the equipment for devising a set of continuous treatment silicon powder waste material, the silicon powder disposal unit cost
It is lower, it can be achieved that small size silicon ball continuous production, yield > 95% of silicon.
To achieve the above object, the technical solution adopted in the utility model are as follows: propose a kind of Buddha's warrior attendant wire cutting silicon powder
High temperature transferred arc Granulation Equipments, including powder pretreatment unit, exhaust treatment system and direct current transferred arc prilling granulator, institute
Stating powder pretreatment unit includes crushing device and thermal chamber, the charging of the discharge port connection thermal chamber of the crushing device
Mouthful, the discharge port of the thermal chamber is connect by conveying device with direct current transferred arc prilling granulator；The direct current transfer electricity
Arc prilling granulator includes DC power supply and water-cooling cover, and negative electrode is provided in the water-cooling cover and rotary annular water-cooled copper is flat
Platform, the cathode of the negative electrode connection DC power supply, the annular water-cooled copper platform connect DC power supply by positive brush
Anode, the annular water-cooled copper platform are set to the lower section of negative electrode, stay between the tail end of negative electrode and annular water-cooled copper platform
There is gap, the bottom of the water-cooling cover is provided with silicon ball discharge port；The exhaust treatment system includes inert gas transfer pipeline
And exhaust gas processing device, the air inlet pipe connection thermal chamber and water-cooling cover of the inert gas transfer pipeline, the transfer pipeline
The thermally treated room top of exhaust pipe and water-cooling cover top draw, and be connected to the air inlet of the exhaust gas processing device.Also wrap
Screening plant is included, the screening plant is set to the underface of the silicon ball discharge port.
Electrode Machinery Control System is connected on the negative electrode, for controlling to adjust the height of the negative electrode.
The conveying device uses screw conveyor.
The crushing device is double-roll crusher, and the double-roll crusher has self heating function.
The beneficial effects of the utility model are embodied in: after the Buddha's warrior attendant wire cutting silicon powder Granulation Equipments of the utility model is with drying
Powder be raw material benchmark, Buddha's warrior attendant wire cutting silicon powder is recycled using direct current transferred arc comminution granulation, passes through ring
The continuous production of silicon ball, yield > 95% of silicon are realized in the rotation of the positive Polar Patform of shape water-cooled copper., the removal rate of carbon impurity reaches
75% or more, 99.9% or so, the silicon ball of generation can be carried out using any traditional smelting equipment into one silicon ball purity
Walk melting purification.Meanwhile the equipment has taken into account the pre-processing of powder, greatly reduces the various of organic matter pyrolytic generation
Pollution of the pernicious gas to environment, and each section linking is rationally, can further increase capacity usage ratio.
Detailed description of the invention
Fig. 1 is the high temperature transferred arc Granulation Equipments of the Buddha's warrior attendant wire cutting silicon powder of the utility model.
In figure: 1- self-heating double roller crushing device, 2- thermal chamber, 3- inert gas transfer pipeline, 4- spiral add powder to fill
It sets, 5- exhaust gas processing device, 6- DC power supply, 7- electrode Machinery Control System, 8- graphite cathode, 9- positive brush, 10- annular
Water-cooled copper platform, 11- water-cooling cover, 12- vibrating screen.
Specific embodiment
The utility model is described in detail with reference to the accompanying drawing.
A kind of high temperature transferred arc Granulation Equipments of Buddha's warrior attendant wire cutting silicon powder as shown in Figure 1, including powder pretreatment dress
It sets, exhaust treatment system, direct current transferred arc prilling granulator and vibrating screen.
Powder pretreatment unit includes self-heating double roller crushing device 1 and thermal chamber 2, self-heating double roller crushing device 1
Discharge port connection thermal chamber 2 feed inlet, the discharge port of thermal chamber 1 turned by 4 device of spiral powder adding device and direct current
Move the connection of electric arc prilling granulator.
Direct current transferred arc prilling granulator includes DC power supply 6 and water-cooling cover 11, is provided with graphite cathode 8 in water-cooling cover 11
And rotary annular water-cooled copper platform 10, graphite cathode 8 connect the cathode of DC power supply 6, are connected with electrode machine on graphite cathode 8
Tool control system 7, for controlling the height of the cathode.Annular water-cooled copper platform 10 connects DC power supply 6 by positive brush 9
Anode, annular water-cooled copper platform 10 is arranged in the lower section of graphite cathode 8, the tail end of graphite cathode 8 and annular water-cooled copper platform
There are gap between 10, the bottom of water-cooling cover 11 is provided with silicon ball discharge port；Vibrating screen is arranged in the lower section of silicon ball discharge port, is used for
The separation of silicon ball and extra powder.
Exhaust treatment system includes inert gas transfer pipeline 3 and exhaust gas processing device 5, inert gas transfer pipeline 3
Air inlet pipe connects thermal chamber 2 and water-cooling cover 11, for conveying argon gas, inert gas delivery pipe in heat treated room and water-cooling cover
Thermally treated 2 top of room of the exhaust pipe on road 3 and 11 top of water-cooling cover are drawn, by the decomposition inside thermal chamber 2 and water-cooling cover 11
Gas leads in exhaust gas processing device 5 and is handled, and treated, and tail gas is discharged into atmosphere after detection is qualified.
The operating process of above equipment is as follows:
(1) two rollers of self-heating double roller crushing device 1 being heated to 100 DEG C, revolving speed is controlled in 1-10 r/min,
Keep silicon powder sufficiently dry, then flows into thermal chamber 2.The temperature of thermal chamber 2 is controlled at 450 DEG C or so, which has
The low-temperature decomposition of machine object, control argon flow be 2-5 L/min, generally by tail gas white cigarette disappear as processing completion according to
According to duration is about 4-6 h.
(2) it is passed through flowing argon gas in water-cooling cover 11, opens annular water-cooled copper platform 10, makes its rotation, control graphite is negative
Pole 8 pulls out stable electric arc, the power control of electric arc is between 1-40 kW at a distance from annular water-cooled copper platform 10.With cyclization
The revolving speed of shape water-cooled copper platform 10, the appropriate revolving speed for adjusting 4 motor of spiral powder adding device keep the thickness control of powder negative in graphite
Between 8 bottom end of pole and annular water-cooled copper platform 10, powder can be advanced optimized according to the size for wanting to obtain silicon ball in production
Thickness, maximum gauge is on the basis of it can generate stable electric arc.Obtained silicon ball is after cooling system is fully cooled, into vibration
Dynamic sieve 12, remaining silicon powder returns to pre-treatment step.
(3) finally obtained silicon ball is cleaned by ultrasonic and is dried, complete silicon powder granulation process.
Claims (5)
1. a kind of high temperature transferred arc Granulation Equipments of Buddha's warrior attendant wire cutting silicon powder, it is characterised in that: including powder pretreatment unit,
Exhaust treatment system and direct current transferred arc prilling granulator, the powder pretreatment unit include crushing device and thermal chamber,
The feed inlet of the discharge port connection thermal chamber of the crushing device, the discharge port of the thermal chamber is by conveying device and directly
Flow the connection of transferred arc prilling granulator；The direct current transferred arc prilling granulator includes DC power supply and water-cooling cover, the water cooling
Negative electrode and rotary annular water-cooled copper platform, the cathode of the negative electrode connection DC power supply, the annular are provided in cover
Water-cooled copper platform connects the anode of DC power supply by positive brush, and the annular water-cooled copper platform is set under negative electrode
Side, there are gap between the tail end of negative electrode and annular water-cooled copper platform, the bottom of the water-cooling cover is provided with silicon ball discharge port；
The exhaust treatment system includes inert gas transfer pipeline and exhaust gas processing device, the air inlet of the inert gas transfer pipeline
Pipe connects thermal chamber and water-cooling cover, and the thermally treated room top of the exhaust pipe of the transfer pipeline and water-cooling cover top are drawn, and
It is connected to the air inlet of the exhaust gas processing device.
2. a kind of high temperature transferred arc Granulation Equipments of Buddha's warrior attendant wire cutting silicon powder according to claim 1, it is characterised in that:
It further include screening plant, the screening plant is set to the underface of the silicon ball discharge port.
3. according to a kind of high temperature transferred arc Granulation Equipments of Buddha's warrior attendant wire cutting silicon powder of any of claims 1 or 2, feature exists
In: it is connected with electrode Machinery Control System on the negative electrode, is used to control to adjust the height of the negative electrode.
4. according to a kind of high temperature transferred arc Granulation Equipments of Buddha's warrior attendant wire cutting silicon powder of any of claims 1 or 2, feature exists
In: the conveying device uses screw conveyor.
5. according to a kind of high temperature transferred arc Granulation Equipments of Buddha's warrior attendant wire cutting silicon powder of any of claims 1 or 2, feature exists
In: the crushing device is double-roll crusher, and the double-roll crusher has self heating function.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821758756.2U CN209631144U (en) | 2018-10-29 | 2018-10-29 | A kind of high temperature transferred arc Granulation Equipments of Buddha's warrior attendant wire cutting silicon powder |
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| CN201821758756.2U CN209631144U (en) | 2018-10-29 | 2018-10-29 | A kind of high temperature transferred arc Granulation Equipments of Buddha's warrior attendant wire cutting silicon powder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109107492A (en) * | 2018-10-29 | 2019-01-01 | 大连颐和顺新材料科技有限公司 | A kind of the high temperature transferred arc Granulation Equipments and method of Buddha's warrior attendant wire cutting silicon powder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109107492A (en) * | 2018-10-29 | 2019-01-01 | 大连颐和顺新材料科技有限公司 | A kind of the high temperature transferred arc Granulation Equipments and method of Buddha's warrior attendant wire cutting silicon powder |
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Effective date of registration: 20210721 Address after: 116000 b-507, No. 32, Lixian street, high tech park, Dalian, Liaoning Patentee after: DALIAN LONGTIAN TECH. Co.,Ltd. Address before: 116000 4th floor, Kechuang building, No. 131, Guangxian Road, high tech Industrial Park, Dalian, Liaoning Patentee before: DALIAN YIHESHUN NEW MATERIAL TECHNOLOGY Co.,Ltd. |