CN101961713B - Classifier without rotor - Google Patents

Classifier without rotor Download PDF

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Publication number
CN101961713B
CN101961713B CN2010102805524A CN201010280552A CN101961713B CN 101961713 B CN101961713 B CN 101961713B CN 2010102805524 A CN2010102805524 A CN 2010102805524A CN 201010280552 A CN201010280552 A CN 201010280552A CN 101961713 B CN101961713 B CN 101961713B
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China
Prior art keywords
fine powder
graded region
meal
air
classification
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CN2010102805524A
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CN101961713A (en
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朱鸿吉
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Shanghai Iva Powder Technology & Equipment Co Ltd
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Shanghai Iva Powder Technology & Equipment Co Ltd
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Abstract

A classifier without a rotor comprises a fine powder classification area and a coarse powder classification area, wherein the fine powder classification area comprises a bend feed pipe, a fine powder classification bin, air deflectors, air holes and a product outlet; the coarse powder classification area comprises a coarse powder classification bin, return slots, a secondary air inlet and a coarse powder outlet; the bend feed pipe is S-shaped; the air deflectors are arranged ringwise; each air inlet is arranged between every two air deflectors; and the fine powder classification bin and the coarse powder classification bin are communicated with each other by the return slots. The powder enters into the classifier from the bend feed pipe under the suction action of a draught fan, slows down and is uniformly spread in an S-shaped buffer area and forms vortex when passing through the air deflectors, the fine powder overflows from the product outlet along with the upflow, the coarse powder enters into the coarse powder classification bin, and flushed by the secondary air, the fine powder entrained by the coarse powder rises to the fine powder classification bin again from the return slots to be classified. The classifier is free of the motor and the classification wheels, lowers the manufacturing cost, the operation cost and the maintenance cost, simultaneously effectively prevents the product from being polluted and improves the product quality.

Description

No rotor grader
Technical field
The present invention relates to a kind of grading plant, the grading plant of particularly processing as powder body material in the new material industry.
Technical background
Grader is called powder concentrator again, and it is the device that utilizes the eddy current centrifugal principle that the powder of certain grain size in the granular material is separated.Grader is the key equipment in the powder system of processing.
Existing grader all belongs to the dynamic classification machine, has a rotor or a plurality of rotor.The single rotor grader has a grading wheel, with vertical or horizontal being installed in the classification storehouse.Grading wheel has a motor as power, directly drives or passes through belt transmission.During the grading wheel rotation material that gets in the classification storehouse is carried out classification.The granularity of product can be through regulating grading wheel rotating speed and carry the air quantity and the blast of the air-introduced machine of powder to realize.In order to improve the classification efficiency of grader; Be designed with the secondary wind air inlet in the stage casing of grader; When surrounding air is directly sucked from the secondary wind air inlet, the meal that falls in the classification process is carried out " flushing ", graded region is arrived in the fine powder blowback of wherein carrying; Reach the purpose of classification once more, thereby improved classification efficiency.
Many rotors grader is in a classification storehouse, a plurality of grading wheels to be installed, and each grading wheel all has a motor-driven and single rotor grader to have same classification principle.
Single rotor grader or many rotors grader and a dust-precipitator, a high-pressure suction fan form a cover hierarchy system.
No matter be single rotor grader or many rotors grader, all need motor to drive, and motor is generally between 12KW to 180KW, power consumption is big.Grading wheel is the critical piece of dynamic classification machine, and designing requirement is very high, and cost of manufacture is high, and installation accuracy requires high; And, grading wheel in high speed rotating with the material collision friction, it is very fast to wear and tear; Especially to the classification of quartzy powder, often will wear and tear in one month, need to change grading wheel; The wearer that falls in the grading wheel wearing and tearing is blended in the powder, causes contamination of products, has influenced the quality of product.
Cut down the consumption of energy is the problem that the powder processing industry is concerned about the most always, also is problem demanding prompt solution.High energy consumption just means high carbon emission and high operating cost; A kind of motor that neither needs; The grader that does not also need grading wheel; The problem that can solve energy-saving and emission-reduction, low cost movement effectively and improve the quality of products again, the grader that grading effect can compare favourably with the dynamic classification machine of band rotor is required in the industry.
Summary of the invention
In order to solve above-mentioned deficiency, the present invention provides a kind of no rotor grader.
A kind of no rotor grader comprises fine powder graded region and meal graded region, and the fine powder graded region is located at the top of meal graded region; Connected by feed chute between the two, be provided with the radial wind deflector that is the inclination angle in the fine powder graded region, the meal graded region is provided with meal classification storehouse and secondary wind import; The delivery air that provides when air-introduced machine carries powder and when the wind deflector of fines graded region, forms eddy current; Powder bulky grain powder under centrifugal action sinks, and gets into meal classification storehouse from feed chute, and subparticle rises with air-flow and gets into the product gathering-device by products export; Under the subnormal ambient that air-introduced machine provides; Ambient windstream sucks from the secondary wind import, and meal is carried out " flushing ", is carried at subparticle in the bulky grain powder and blows again from feed chute and get back to the classification again of fine powder graded region.
Said fine powder graded region also is provided with some wind deflectors, and every wind deflector is the center of circle with the products export, is radial arrangement with angle, forms a fine powder classification storehouse between the wind deflector after the arrangement.
Constitute air inlet between adjacent two wind deflectors of said wind deflector.
Said fine powder graded region also comprises the charging bend pipe, and this charging bend pipe is S-type, and each crook forms a buffering area.
The top of said air inlet is provided with pore.
Said fine powder graded region and meal graded region are separated by base plate, are provided with feed chute around the base plate.
Said secondary wind import is provided with adjusting device, and the air quantity size of secondary wind import is regulated.
Powder is got into by the charging bend pipe under the swabbing action of air-introduced machine, and slows down speed, uniformly dispersing at buffering area, because wind deflector is the center of circle with the products export; The radial arrangement that is inclination constitutes air inlet between adjacent two wind deflectors, and material stream forms eddy current when passing wind deflector; Fine powder is with the ascending air products export of overflowing, and meal falls into feed chute after centrifugal direction is dished out, and gets into meal classification storehouse from feed chute; Ambient windstream imports from secondary wind inlet nature under action of negative pressure; Meal under falling is carried out " towards Xian ", blow back fine powder classification storehouse to the fine powder that is carried in the meal from feed chute, get back in the products export again.
The present invention has changed the structure of traditional single rotor and many rotors grader, no motor, no grading wheel.Through wind deflector eddy current is optimized in the classification process, adds and regulate the flushing air-flow effectively, and the rapid discharging of meal, just can satisfy varigrained classification requirement, can guarantee does not have oversized particles in the product, and the summit cutting is clear.Performance can compare favourably with the grader of traditional band rotor.This apparatus structure is simple, has saved steel, has reduced manufacturing cost.Save motor, reduced operating cost.Be convenient to adopt the high-abrasive material protection, reduced maintenance cost, also prevented pollution effectively simultaneously, improved product quality, therefore be worthy to be popularized product.
Description of drawings
Fig. 1 is the sketch map of no rotor grader;
Fig. 2 is another sketch map of no rotor grader.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described.
The present invention provides a kind of no rotor grader, comprises fine powder graded region 1 and meal graded region 2, and fine powder graded region 1 is arranged on the top of meal graded region 2.Fine powder graded region 1 comprises charging bend pipe 3, fine powder classification storehouse 4 and some wind deflectors 5 (the present invention is that example is explained with 4 wind deflectors, is not limited to 4 wind deflectors).Charging bend pipe 3 is provided with S type buffering area 31, and the top of fine powder graded region 1 is provided with products export 6, and wind deflector is the center of circle with products export 6; The radial arrangement that is inclination, every wind deflector front end to the distance in the center of circle all less than the distance of wind deflector rear end, therefore to the center of circle; The 1st wind deflector 51 and charging elbow internal wall the 32, the 1st wind deflector 51 and the 2nd wind deflector the 52, the 2nd wind deflector 52 and the 3rd wind deflector 53; Form air inlet 71, air inlet 72, air inlet 73, air inlet 74 respectively between the 3rd wind deflector 53 and the 4th wind deflector 54, wind deflector up and down two ends is connected with the upper and lower plates of fine powder graded region 1 with bolt respectively and fixes, and the top of each air inlet is provided with pore 91; Have feed chute 9 on the base plate 8 in fine powder classification storehouse 4; Fine powder graded region 1 is communicated with meal graded region 2, a support 10 is arranged in the meal classification storehouse, be used to support base plate 8; The below of meal graded region 2 is provided with secondary wind air inlet 21 and meal outlet 22; The secondary air mouth is provided with adjusting device, can adjust the size of secondary wind import through adjusting device, controls the size of intake in view of the above.
Products export 6 is in the suction of air-introduced machine, forms negative pressure in the fine powder classification storehouse, and material gets in the charging bend pipe 3; The material that gets into fast evenly scatters and reducing speed after colliding buffering area 31; Material after scattering gets in the fine powder classification storehouses from air inlet 71,72,73,74 respectively, the ascending eddy of formation quick rotation under the effect of wind deflector, and fine powder is with the ascending air products export of overflowing; Collect through supporting dust-precipitator then; Bulky grain gets into meal classification storehouse from feed chute 9 under action of centrifugal force, under subnormal ambient, surrounding air flows in the meal classification storehouse from secondary wind entrance region 21 naturally; Meal is carried out " flushing ", the fine powder that is entrained in the bulky grain is carried out classification again through feed chute 9 blowbacks in fine powder classification storehouse 6.
Can control the granularity and the production capacity of graded product through the arrangement of change wind deflector with to the control of air quantity.
The invention effect:
With single rotor, the contrast of many rotors grader, no rotor grader has following characteristics and advantage:
1. do not need motor, meet low-carbon (LC), environmental requirement.
For example: 10 microns of classifying capability D97,300 kilograms no rotor grader per hour is equivalent to the classifying capability of the single rotor grader of a diameter 315mm; The latter's motor is the powder that 15kW. that is to say 10 microns of 300 kilograms of D97 of every production, can save powder processing factory that produces 30000 tons per year of power consumption 15kWh., can save power consumption 1 in 1 year; 500, therefore 000kWh. the invention belongs to Green Product; Meet the energy-saving low-carbon requirement, saved operating cost simultaneously widely.
2. do not have grading wheel, saved manufacturing cost.
The core of single rotor and many rotors grader is a grading wheel.Under situation reasonable in design, the fineness of product and quality lean on the machining accuracy of grading wheel to guarantee.Single rotor and many rotors grader all have very high requirement to material, machining accuracy and the cooperation of grading wheel.Exactly do not saved this key component and there is the rotor grader.In addition, the material usage of no rotor grader less than equal single rotor grader 1/2. therefore, can save manufacturing costs such as raw material, processing charges widely.
3. simple in structure, be convenient to adopt various high-abrasive material protections.
Have the grader of grading wheel because strong impact and friction take place in rotation at a high speed when touching material.Particularly evident when the classification hard material, grading wheel will be worn in very short time, to such an extent as to can't use; Its result not only maintenance capacity is big, causes production cost to improve, and main is because the micro mist after the wearing and tearing gets in the product; Pollute product, directly influenced product gas purity and quality.And still do not have highly effective method for the Wear-resistant Treatment of grading wheel at present.
Because no rotor grader is simple in structure, therefore no dynamic component is easy to adopt various preventing-abrasion methods to protect effectively, and maintenance capacity is low, and factory can reach iron-free and divide a grade effect service life, guaranteed product purity.This point is particularly important for processing electron level high-purity quartz powder and chemical industry, food, medicine etc.
4. grading effect can match in excellence or beauty with band rotor grader
No rotor grader and single rotor, many rotors grader have same grading effect and effectiveness of classification.Product granularity can be regulated between the 5-120 micron.Hourly output can be by tens kilograms to several tons.
5. multipurpose.
No rotor grader can be the same with single rotor or many rotors grader, uses separately or form closed cycles with various milling apparatus such as ball mill, and various powder products are carried out classification.No rotor grader can also be as presorting level.Abrasive product is presorted level; Can improve the effect of secondary classification, reduce wearing and tearing, can also improve the grinding efficiency of on-line grinding equipment simultaneously the secondary classifying equipoment; In addition; It can also be used for the product dedusting, promptly removes dust meticulous in the product, makes product reach the size distribution of specific (special) requirements.
Use the product granularity analysis report of classification of the present invention to see Fig. 3
Though the present invention with embodiment openly as above, so it is not in order to limit the present invention, to have common knowledge the knowledgeable in any affiliated field, not break away from the spirit and scope of the present invention, when doing a little change and retouching, all should belong to protection scope of the present invention.

Claims (7)

1. a no rotor grader comprises fine powder graded region and meal graded region, and the fine powder graded region is located at the top of meal graded region; Connected by feed chute between the two, be provided with some radial wind deflectors that are the inclination angle in the fine powder graded region, the meal graded region is provided with meal classification storehouse and secondary wind import; The delivery air that provides when air-introduced machine carries powder and when the wind deflector of fines graded region, forms eddy current; Powder bulky grain powder under centrifugal action sinks, and gets into the meal graded region from feed chute, and subparticle rises with air-flow and gets into the product gathering-device by products export; Under the subnormal ambient that air-introduced machine provides; Ambient windstream sucks from the secondary wind import, and meal is carried out " flushing ", is carried at subparticle in the bulky grain powder and blows again from feed chute and get back to the classification again of fine powder graded region.
2. no rotor grader as claimed in claim 1 is characterized in that every wind deflector is the center of circle with the products export, is radial arrangement with angle, and the mid portion that wind deflector surrounds is fine powder classification storehouse.
3. no rotor grader as claimed in claim 2 is characterized in that, constitutes air inlet between adjacent two wind deflectors.
4. no rotor grader as claimed in claim 1 is characterized in that said fine powder graded region also comprises the charging bend pipe, and this charging bend pipe is S-type.
5. no rotor grader as claimed in claim 3 is characterized in that the top of each air inlet all is provided with pore.
6. no rotor grader as claimed in claim 1 is characterized in that said fine powder graded region and meal graded region are separated by base plate, is provided with feed chute around the base plate.
7. no rotor grader as claimed in claim 1 is characterized in that the secondary wind import is provided with adjusting device, and the air quantity size of secondary wind import is regulated.
CN2010102805524A 2010-09-14 2010-09-14 Classifier without rotor Active CN101961713B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010102805524A CN101961713B (en) 2010-09-14 2010-09-14 Classifier without rotor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010102805524A CN101961713B (en) 2010-09-14 2010-09-14 Classifier without rotor

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CN101961713A CN101961713A (en) 2011-02-02
CN101961713B true CN101961713B (en) 2012-11-21

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106076841A (en) * 2016-07-27 2016-11-09 无锡市华通电力设备有限公司 A kind of flyash grader secondary air and ash bucket structure

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10202191A (en) * 1997-01-24 1998-08-04 Fuji Xerox Co Ltd Air current type classification machine
JP2008018321A (en) * 2006-07-12 2008-01-31 Ricoh Co Ltd Classifier, classification method, toner, and its manufacturing method
CN201079779Y (en) * 2007-05-12 2008-07-02 绵阳高新区巨子超微科技有限公司 Grading machine with isolating plate on grading wheel
CN201102015Y (en) * 2007-10-18 2008-08-20 刘怀平 Cataract type air separator

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