SU1593675A1 - Pneumatic classifier - Google Patents

Abstract

The invention relates to the separation of bulk materials using air streams and can be used in the chemical, electrode, and other industries. The purpose of the invention is to increase the efficiency of classification by increasing the effect of centrifugal force on the material in the annular cavity between the outer and inner housings while reducing the impact of aerodynamic force on the height of the classifier. An annular cavity / KP / 5 is formed between the outer casing / VK / 1 and the inner 2 classifier. The radius of the VK 1 is continuously reduced from bottom to top or remains constant. In this case, in the first case, the area of the CP 5 remains constant, in the second, it continuously increases from bottom to top. KP 5 has spiral elements / СЭ / 3, 4. In its lower and upper parts, respectively, VK 1, there are nozzles 6 and 7 for supplying raw material and air and nozzles 8 and 9 for outputting large and small products. The source material is supplied to KP 5, where the air enters from the pipe 7. The material is twisted by the SC 3, 4. Large particles along the inner wall of the VK 1 slide down and are removed through the pipe 8. The small particles move with the air after turning the SC 3, 4 upward and removed through nozzles 9. Due to an increase in centrifugal forces, the entrainment of large parts with fines is reduced. 3 ill., 1 tab.

Description

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The distance between the outer and inner hulls while reducing the impact of aerodynamic force on the height of the classifier. An annular cavity (QD) 5 is formed between the outer casing (SK) 1 and the inner 2 class of the fixer. The radius of the VC 1 is continuously reduced from bottom to top or remains constant. At the same time, in the first case, the area of KP 5 remains constant; in the second case, spiral elements (ESS) 3 4 are continuously increasing from the bottom of KP 5. In its lower and upper parts, respectively, VK 1

there are nozzles 6 and 7 for supplying the source material and air, and nozzles 8 and 9, for the withdrawal of large and small products. The source material is fed to KP 5, where the air from the nozzle also enters. The material is twisted NW 3, 4, Large parts along the inner wall of VC 1 slide down and are removed through pipe 8, Fine particles after spinning SE 3, 4 move together with air up and are removed through pipes 9. Due to the increase in centrifugal forces, the ash decreases large particles with a trifle, 3 ill.

The invention relates to the field of separation of bulk materials using air flow and can be used in the chemical, electrode, mining, and other industries.

The purpose of the invention is to noBbmieaie classification efficiency due to an increase in the effect of centrifugal force on the material in the annular cavity between the outer and inner shells with a simultaneous decrease in the impact of aerodynamic force on the classifier.

Fig, 1 shows the classifier, a vertical section; FIG. 2 is a section A-A in FIG. one; FIG. 3 is a section BB in FIG. 1,

Classifier consists of external

1 and internal 2 buildings. On the outer surface of the inner shell

2 and on the inner surface of the outer casing 1 are located the spiral horned contact elements

3 and 4; Between the housings 1 and 2 there is a call to the annular cavity 5,. The radius of the housing 1 is continuously reduced from bottom to top or remains constant. In the first case, the area of the cavity

5 from bottom to top remains eaten constant or continuously increases, and in the second case, it continuously increases. To feed the source material and air into the cavity 5, the nozzles 6 and the nozzles 8 and 9 are installed, respectively. They are used for the withdrawal of correspondingly large and small fractions.

The categorizer works as follows.

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five

five

Q Q

five

50

55

The source material is fed through the pipe 6 into the cavity 5, where the screws are; The air flow through the nozzle 7 and the swirling spiral contact elements 3 and 4, the material is twisted by the air flow on the contact elements 3 and 4 and in the space between them.

Large particles under the action of centrifugal forces are thrown to the outer casing 1, are displaced to the bottom of the apparatus and discharged through the pipe 8, the small particles are carried up and removed with air through the pipe 9,

Claims (1)

The proposed design of the classifier allows you to continuously increase the effect of centrifugal force on the material and reduce the impact of aerodynamic force. At the same time, large particles captured by upward moving small particles by increasing the centrifugal effect are dropped to the outer surface of the outer shell and removed from the classifier, which increases efficiency classification. Invention Formula Pneumatic classifier, which includes the outer and inner shells, forming between them an annular cavity with spiral contact elements located in it, the area of which increases from bottom to top, pipes for supplying source material and air, outlet pipes for coarse and fines, located respectively at the bottom and top 15936 parts of the classifier, so that, in order to increase the classification efficiency by increasing the effect of centrifugal force on the material in the annular cavity between the outer and B1 of the inner body, while reducing the effect of aerodynamic force on the height of the classifier, for Q FIG. 2 756 BHenufero's coryus uninterruptedly decreases the SS-13U upwards or remains itoconomic, while in the first case the slot of the annular cavity between the outer and inner housings continuously increases from the bottom of Hierch or remains constant, and in the second case the area of the annular cavity continuously increases down up, .d