CN2210722Y - High-efficiency centrifugal powder-sieving machine - Google Patents
High-efficiency centrifugal powder-sieving machine Download PDFInfo
- Publication number
- CN2210722Y CN2210722Y CN 94241581 CN94241581U CN2210722Y CN 2210722 Y CN2210722 Y CN 2210722Y CN 94241581 CN94241581 CN 94241581 CN 94241581 U CN94241581 U CN 94241581U CN 2210722 Y CN2210722 Y CN 2210722Y
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- sieving machine
- centrifugal powder
- powder
- powder concentrator
- blade
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Abstract
The utility model relates to a high-efficiency centrifugal powder-sieving machine improving the structure of the original centrifugal powder-sieving machine. Apart from improving a wing wheel composed of big blades, a material spreading disk, returning blades, etc., the utility model is added with an inner sleeve barrel and a metal outer sleeve barrel, and meanwhile, small blades on the original centrifugal powder-sieving machine are converted into rotating wheel type stepped faces. The efficiency of the high-efficiency centrifugal powder-sieving machine is 15-20% higher than that of the ordinary centrifugal powder-sieving machine, the stability of the high-efficiency centrifugal powder-sieving machine is more than 70%, the throughput of the high-efficiency centrifugal powder-sieving machine is 10-15% higher than that of the ordinary centrifugal powder-sieving machine, and the utility model has stable quality.
Description
The utility model is a kind of equipment that utilizes the strength field and the solid particle of different thicknesses is carried out classification.
Centrifugal classifier extensive use cement industry is an important composition equipment of closed cycle grinding system.Its objective is that the qualified products that will go out in the grind materials in time separate, in mill, adhere to abrasive body and liner plate, form cushion, weaken grinding effect, thereby improve mill efficiency, lower energy consumption to prevent fine powder.Its action principle is the solid particle according to different thicknesses, the difference of stressing conditions in the strength field in powder concentrator internal classification district, and reach the purpose of sorting.By changing corresponding operation or structural parameters, can change graded region strength field, and reach desired separating effect.Common centrifugal classifier structure is seen Fig. 1 (generalized section), and wherein 1 is main shaft, the 2nd, and the wing wheel that big blade is formed, the 3rd, inner barrel, the 4th, outer cylinder body, the 5th, return air leaf, the 6th, interior space, the 7th, the external space, 8 are the meal outlet, 9 is the fine powder import, 10 is spreading disk, 11 is little fan blade, and 12 is wind isolation board, and 13 is charging aperture.The material for the treatment of sorting is added to spreading disk through feed pipe, because the revolution of spreading disk, material is let go under the effect of centrifugal inertial force, and enters graded region.Material in graded region is under airflow acting force, centrifugal inertial force and gravity effect and separate, thinner particle is taken out of graded region and is entered urceolus by air-flow, and from air-flow, separate into finished product, meal (particle) is then collected in the inner core sedimentation, reaches sorting purposes.
Centrifugal classifier is comparatively simple because of its basic structure, and classification principle is reasonable substantially, can satisfy the production requirement of cement industry substantially, and be widely adopted, but because of itself structural deficiency, the technical performance of this powder concentrator exists tangible characteristics:
1, material dispersed is relatively poor during spreading.
2, return air leaf place inner core section is excessive, sorting undercapacity when circulating current enters graded region.When the dust concentration in the graded region was higher, air-flow can not fully be broken up dust, and quite a few particle phase mutual interference forms cluster of grains, sneaked into meal and did not reach the purpose of sorting.
3, fine powder is not high in the separative efficiency of urceolus, there is the part fine powder to come back to graded region with circulating current, and influence the effect of sorting, just because of above-mentioned technical problem, the centrifugal classifier grinding efficiency that present cement industry is generally adopted is not high, unstable product quality, thus limit the further production of whole grinding system and subtracted consumption.
This new and effective centrifugal classifier purpose is exactly after having done a large amount of investigation, analyze at concrete problem, on the basis of original centrifugal classifier, done the improvement that new meaning is rationally arranged, now the experiment proved that, improvement of the present utility model is successful, reached efficient, the high yield of expection, the purpose of low consumption.
The concrete structure of utility model is provided by accompanying drawing.
Fig. 5 is the profile of this new and effective centrifugal classifier.
Fig. 2 a is the big blade blade vertical view of common centrifugal classifier, and Fig. 2 b is the big blade blade vertical view of novel centrifugal type powder concentrator.
Fig. 3 a is the spreading disk profile of common centrifugal classifier, and Fig. 3 b is the spreading disk profile of novel centrifugal type powder concentrator.
Fig. 4 is the rotary-type classification face profile of novel centrifugal type powder concentrator.
The purpose of this utility model is achieved in that
Select efficient for reaching the powder that improves powder concentrator, lower the power consumption of system, our guiding theory is after wishing to treat that sorting material enters graded region, can fully disperse; And under a more stable force field, carry out sorting, have metastable Cut size dc.Thick, fine powder after the sorting can be separated from gas phase efficiently, prevent the mixed once more of thick, fine powder.It is convenient to control product fineness simultaneously, and the energy flexible modulation is to satisfy various production requirement.According to this guiding theory, we have designed new and effective centrifugal classifier, and its generalized section is seen Fig. 5.Remove the wing wheel 2 that big blade is formed, outside spreading disk 10 and return air leaf 5 are transformed, also increased inner sleeve 8 and metal-coating tube 14, simultaneously little fan blade 11 for being changed to rotary-type classification face 16.Down in the improvement details that is described with reference to the accompanying drawings this efficient centrifugal formula powder concentrator.
The big blade blade of existing centrifugal classifier mostly is radial blade, and resistance is big, and the fan blade wearing and tearing are comparatively serious (seeing that Fig. 2 a is former blade vertical view) also.We use hypsokinesis type blade instead, the experiment proved that the power consumption that can reduce fan blade, improve the efficient of fan blade, and protect the function of motive power nonoverload in addition.See new blade vertical view 2b.
The flat spreading disk that original powder concentrator generally adopts, the bad dispersibility of material casting is unfavorable for selecting powder (seeing former spreading disk profile 3a).The present invention designs the spreading disk that has adopted outer rim that boss is arranged, and between 5 °-8 ° at its boss angle of inclination, its material casting ability is stronger, and material can disperse in graded region preferably, and fully sorting.See novel spreading disk profile 3b.
It is bigger to consider that former powder concentrator circulating current enters the inner core basal area at return air leaf place, air velocity is lower, do not reach the purpose of abundant sorting, for increasing the classification intensity of graded region, we are provided with an inner sleeve 15(herein and see Fig. 5), to reduce the air cavity area, improve air velocity herein, sorting intensity is strengthened, and can reach the purpose of secondary sorting.
Be to increase the collection rate of fine powder, prevent that fine powder from returning graded region with circulating current, and lower grinding efficiency at urceolus.The present invention adds a special metal-coating tube 14(and sees Fig. 5 between inside and outside tube), be fixed on the former inner tube wall.Air-flow need be collected principle according to inertia through the turning of wide-angle before flowing into the return air leaf like this, can prevent that fine powder from refluxing, and improve separative efficiency.
For further improving the adjustability of classification intensity and operation, the present invention makes former return air blade into adjustable (seeing adjustable return air leaf 5 among Fig. 5), so that powder concentrator is in operating process, according to production requirement, regulate the angle of return air leaf, the strength that changes in the graded region is raised, and reaches best duty.
We also change former little fan blade into rotary-type classification face (the rotary-type classification 16 among meeting Fig. 5), and its concrete shape is seen generalized section 4.Can improve classification intensity effectively, the meal content in the control fine powder.This classification face can be regulated its classification intensity by the size that changes its gap.When other operating condition one timing, the gap is big, and powder particle size is thick; The gap is little, the fine size of fine powder.
The present invention is directed to the existing problem of original powder concentrator, done after the above-mentioned improvement, the grinding efficiency of its new and effective centrifugal powder concentrator is stabilized in more than 70%, is greatly increased than existing common centrifugal classifier efficient (50-60%); And the adjustability of product fineness is strong, can be according to producing the needs flexible modulation.
Embodiment.The utility model has obtained implementing on two centrifugal classifiers in cement plant, Huai-Hai, Jiangsu, and its effect is satisfactory.Before the transformation, the treating capacity of two powder concentrators is 220-250T/h, and efficient is 50-55%, because powder concentrator is handled quantitative limitation, whole grinding system does not reach former design output (300T/h), and product quality often has fluctuation.After the transformation, treating capacity is 290-300T/h, has reached former designing requirement basically, and grinding efficiency is more than 70%, and constant product quality.
Claims (5)
1, a kind of new and effective centrifugal classifier, form by wing wheel, inner barrel, outer cylinder body, return air leaf, spreading disk, rotary-type classification face, wind isolation board, inner sleeve and metal-coating tube that main shaft, big blade are formed, it is characterized in that one inner sleeve 15 being set at return air leaf place, between inside and outside tube, add a metal-coating tube 14, be fixed on the former inner tube wall.
2, efficient centrifugal formula powder concentrator according to claim 1 is characterized in that the big blade in the wing wheel that big blade forms adopts hypsokinesis type blade.
3, efficient centrifugal formula powder concentrator according to claim 1 is characterized in that the outer rim of spreading disk has boss, and its boss angle of inclination is between 5 °-8 °.
4, efficient centrifugal formula powder concentrator according to claim 1 is characterized in that adopting adjustable return air leaf.
5, efficient centrifugal formula powder concentrator according to claim 1 is characterized in that being adapted as rotary-type classification face in the position of former little fan blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94241581 CN2210722Y (en) | 1994-04-05 | 1994-04-05 | High-efficiency centrifugal powder-sieving machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94241581 CN2210722Y (en) | 1994-04-05 | 1994-04-05 | High-efficiency centrifugal powder-sieving machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2210722Y true CN2210722Y (en) | 1995-10-25 |
Family
ID=33848326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94241581 Expired - Fee Related CN2210722Y (en) | 1994-04-05 | 1994-04-05 | High-efficiency centrifugal powder-sieving machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2210722Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100376329C (en) * | 2004-02-26 | 2008-03-26 | 福斯特能源公司 | Method and appts.to sort particles flowing from verticle grinder |
| CN100408191C (en) * | 2004-03-18 | 2008-08-06 | 张仁鸿 | Separation mechanism of grinder |
| CN101947514A (en) * | 2010-10-21 | 2011-01-19 | 陈蕾 | Coarse fraction powder concentrator |
| CN106622617A (en) * | 2017-02-27 | 2017-05-10 | 中国华电集团科学技术研究总院有限公司 | Dual-channel rotation inertia coarse powder separator |
-
1994
- 1994-04-05 CN CN 94241581 patent/CN2210722Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100376329C (en) * | 2004-02-26 | 2008-03-26 | 福斯特能源公司 | Method and appts.to sort particles flowing from verticle grinder |
| CN100408191C (en) * | 2004-03-18 | 2008-08-06 | 张仁鸿 | Separation mechanism of grinder |
| CN101947514A (en) * | 2010-10-21 | 2011-01-19 | 陈蕾 | Coarse fraction powder concentrator |
| CN106622617A (en) * | 2017-02-27 | 2017-05-10 | 中国华电集团科学技术研究总院有限公司 | Dual-channel rotation inertia coarse powder separator |
| CN106622617B (en) * | 2017-02-27 | 2018-08-07 | 中国华电集团科学技术研究总院有限公司 | Tailing separator is used in binary channels rotation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |