CN2194216Y - Superthin powder dry method rotator sorter - Google Patents

Abstract

The utility model relates to a superthin powder dry method rotator sorter which adopts a unique stacked slice type impeller and a structure of four sections of housing barrel bodies. The design uses the secondary air and the third air, which enhances the secondary powder sorting capacity. Compared with other type sorters, the pressure drop loss of the sorter is obviously reduced, and the neutral position particle diameter of the qualified particle body after the classification is less than 1 mum (superthin). The sorting precision is 0.9-0.6, and the sorting efficiency is 60-70%. The sorter can be used by matching with any mechanical crushing device. The utility model is suitable for various inorganic, organic, non-metallic, metal material, agrochemical, food product sorting devices, etc.

Description

Superthin powder dry method rotator sorter

The utility model belongs to various organic and inorganic, the metals of preparation mechanical, nonmetal micro mist, the matching used classifying equipoment of ultra-fine grain powder.

Micro mist, superfine powder material have broad application prospects in fields such as chemical industry, new materials.Adopting mechanical crushing method is the important channel that obtains a large amount of micro mists, superfine powder.In recent years, the micro mist of China, superfine powder disintegrating apparatus had obtained certain development, were progressively using on a large scale in suitability for industrialized production as airflow milling, ultra-fine vibromill etc.But no matter adopt the disintegrating apparatus of what type, it is difficult attempting once can obtain qualified powder granule by pulverizing, can produce meticulous phenomenon on the contrary, like this, not only can waste a large amount of electric energy, and product is of low quality.Therefore, say in a sense that the development of Super-fine Classification Technology is depended in the development of preparation mechanical superfine powder particle.In recent years, many in the world developed countries have all released various forms of graders successively.As the thin river ironworker of Japan MS type, MS-H type, MS-N type, MSS type; ATP, MP, the MPS type of Germany ALPINE company; The MC-RF of Finland LAOX.OR company, MC-C type or the like.Such grader has been represented international advanced level basically, and the meta particle diameter of product can reach below the 1.5 μ m after the classification.China just begins research and development to classifying equipoment mid-term from the eighties, and various forms of models (laboratory scale) grader emerges in an endless stream, still, and imitation many, independent lacking of creating.Make a general survey of the present situation of domestic and international superfine powder classification technique, the main problem following points that exist:

1. international classification technique has reached higher level, and the meta particle diameter after the classification can reach about 1.5 μ m.But, because these technology belong to the category of new and high technology, in the world China being enforced a blockade, the grader that can sell China only is some low-level graders (general Cut size is at 2～3 μ m), and costs an arm and a leg.

2. domestic classification technique is relatively backward, and the grader type that really can be used in suitability for industrialized production is also fewer, and the product fineness that reaches after the classification generally is known as 3 μ m, actually can only reach 7～10 μ m.The quality of graded product (effectiveness of classification), classification efficiency are compared the bigger gap of existence with the world.

3. superfine powder dry method rotator type grader is domestic still blank.

The purpose of this utility model is exactly on the basis of the above, through investigation, according to lot of experiment results, superfine powder dry method rotor grader of new generation is abdicated in exploitation, product fineness reaches below the 1 μ m, and effectiveness of classification and classification efficiency have all reached world level, and cost is lower.

Major technique means of the present utility model are centrifugal force fields of utilizing high speed rotor to produce, and the particle that is suspended in the air-flow is separated by thickness, obtain meeting the powder that the particle rank requires.

Below in conjunction with accompanying drawing the utility model is elaborated.

Fig. 1 is the superfine powder dry method rotor grader that the present invention proposes, and wherein 1 is stacked high-speed rotating impeller, and 2,3,4 is respectively one, two, three wind air inlet, 2 also is material inlet simultaneously, wind band material and mouthful is blown into thus, and the 5th, inner core, the 6th, tertiary air dispersed structure, the 7th, prevent to pollute the powder of processing and wear-resisting interior adherent material, the 8th, secondary general mood stream spray-hole, the 9th, main shaft, the 10th, bearing, the 11st, bearing spider, the 12nd, bracing frame.Now the grader with φ 800 is that example is introduced relevant structural design and characteristics:

1. the internal diameter of the useful space of the casing cylinder inside of this grader is 800mm; The height of contour of grader is 1200mm; Casing cylinder is divided into four segment structures, and purpose is to make things convenient for installing/dismounting to clean.

2. the normal blade wheel structure that adopts of international, domestic rotator type grader is shutter shape (as shown in Figure 2), and the impeller of this form finds to exist following two tangible weakness by our experiment:

A. back-pressure is too big, the energy consumption height;

B. the blade owing to each louvered need be welded on the impeller, and therefore, the distance between the blade is difficult to be De Taimi, thereby the product fineness after the grader classification is difficult to further decline.

For overcoming above-mentioned two weakness, blade wheel structure signal of the present utility model is as Fig. 3, and characteristics are to adopt stacked blade wheel structure, and the distance between each lamination is 1～60mm.After adopting this impeller, the back-pressure of grader obviously descends and (has only 200mmH ₂About O), and the grader of general same scale in same operating condition up to 500～700mmH ₂O.Also by a relatively large margin decline of the fineness of thin product, the meta particle diameter can reach 0.4～0.5 μ m.

3. in order to improve classification efficiency, this grader has adopted the secondary injection airflow apparatus, promptly ring circle Monday all is added with secondary general mood stream spray-hole on outer tube wall, the aperture is 5～10mm, the outside is shut by iron plate, secondary general mood stream is sprayed in the grader cylindrical shell by this class spray-hole (to be seen Fig. 4, is the schematic diagram of secondary injection airflow hole structure on the barrel).And tertiary air dispersal device once more, (seeing 6 among Fig. 1), purpose is to make under centrifugal action fast that adherent powder secondary under the jet-stream wind effect obtains disperseing, and the powder that slides near the exit is down further flown upward, the qualified fine powder of carrying secretly in the coarse granule brought back to once more remove to discharge grader in the impeller, reach the purpose that improves classification efficiency.

4. consider that grader can be to issuable pollution of converted products and wear problem, the utility model has adopted the adherent treatment technology of inwall, difference according to customer requirements and converted products character, can adopt materials such as potsherd, wear-resisting steel disc, abrasive rubber, Polyurethane be attached to the contacted inwall of powder on (see Fig. 5, be anti-pollution and wearing and tearing adherent structural representations).

The superfine powder dry method rotor grader of the utility model design, when rotating speed during at 4000rpm, product meta particle diameter the thinnest after its classification reaches 0.4～0.5 μ m, and newton's classification efficiency can reach 60～70%, effectiveness of classification (D25/D75=0.9～0.6), treating capacity 50～100kg/hr.

The grader of above-mentioned φ 800 is a representative instance in the serial grader of the present invention, and grader of the present invention can or dwindle the grader that makes other specification by the equal proportion amplification.

Embodiment.This grader is great that ultra micro powder pulverizing Co., Ltd makes and used by the said firm (with the circuit grinding supporting use of the said firm from West Germany's introduction) by the Wuxi.Its effect is satisfactory, has reached above-mentioned every index substantially, demarcates treating capacity 83kg/hr, and can normally use for a long time, and noise is in the industrial production allowed band, and vibration is eliminated substantially.

Claims (3)

1, a kind of centrifugal force field of utilizing high speed rotor to produce will be suspended in the superfine powder dry method rotor grader that the particle in the air-flow separates by thickness, form by main shaft, bearing, bracing frame, four sections casing cylinders and lamination impeller, it is characterized in that this grader casing cylinder is divided into four segment structures, blade wheel structure is stacked, and distance is 1～60mm between each lamination.

2,, it is characterized in that tertiary air air-flow dispersal device once more being housed in the inner core bottom in that secondary general mood stream spray-hole was housed along one week of outer tube wall by the described superfine powder dry classification of claim 1 machine.

3, by the described superfine powder dry classification of claim 1 machine, it is characterized in that adopting potsherd or wear-resisting steel disc or materials such as abrasive rubber or Polyurethane be attached to the contacted inwall of powder on.

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