SU1282919A1 - Centrifugal separator - Google Patents

Abstract

The invention relates to a technique for separating solid particles by size and improves the efficiency of the separation process by cleaning out a large product in the inner cone (K) 2 of a centrifugal separator (CS) and increasing productivity by pre-selecting a part of the large product from the original mixture in its outer K 1 For this purpose, around the circumference K 2, windows 6 are made with pivoting plates 7 and are arranged in one or several horizontal rows. Between K 1 and 2, coaxial cylindrical shells 8 are installed according to the number of rows of windows 6. The mixture enters the CS through its inlet (P) 3. At level P 3, it is located (L

Description

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The lower part of the shell 8. The upper part of each shell 8 is adjacent to the upper edge of the windows 6 of the corresponding row. At the entrance to the CS near the flow axis there is an area of increased concentration of large particles. Peripheral flow share in the annular channel between the shell 8 and K 1 direction 19

The upper part of K 2 flows through the windows 6 and the plate 7 through the annular gap between K 2 and the shell 8 through the windows 6 and the plate 7 into the middle part of K 2. Small and large products from Tsvsod ts through the corresponding output P4 and 5 .1 hp f-ly, 1 ill.

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The invention relates to the technique of separation of the solid particles of a mill product and can be used in dust systems of boiler plants of thermal power plants.

The purpose of the invention is to improve the efficiency of the separation process by cleaning the coarse product in the inner cone and increasing productivity by pre-selecting a part of the coarse product from the initial mixture in the outer cone.

The drawing shows a centrifugal separator, a general view.

The centrifugal separator contains an outer cone 1, an inner cone 2, an inlet nozzle 3 of the initial product, an outlet nozzle 4 of a fine product (finished dust) and a nozzle 5 of a large product. In the inner cone 2, windows 6 are provided, provided with plates 7 mounted rotatably. Windows 6 are arranged circumferentially in one or more horizontal rows. A cylindrical shell 8 is installed between the inner and outer cones, the upper end of which is adjacent to the upper edge of windows 6, and the lower end is located at the level of the middle inlet of the initial mixture.

The separator works as follows.

The initial mixture (mill product) is fed to the separation into the separator through the inlet nozzle 3. At the entrance to the separator, near the flow axis there is a zone of increased concentration of large particles. Peripheral flow rate over the ring

channel, a cylindrical shell 8 and an anus cone 1 is directed to the upper part of the inner cone 2, where

centrifugal separation.

Prioseva dolny mill product with a high concentration of large particles in an annular gap. between the inner cone 2 and the shell 8 through it 6 and the rotary plates 7 enters the middle part of the inner cone 2. Fine product through the nozzle 4 is removed from the separator, and the large product through the nozzle 5 enters the additional leveling in the mill.

The introduction of the mill product into the inner cone is dispersed in height and allows a significant reduction in the separation zone volume per edge, which increases the separation efficiency of particles by size. The location of the vertical separation zones one above the other allows one to organize internal sifting of the nedomol stream as it moves from the upper separation zone to the outlet pipeline.

Increasing the efficiency of particle size separation makes it possible to reduce the amount of finished dust contained in nedomol, to reduce the load of the mill circulating in

dusting system material and improve the performance of the dust preparation system. Learn that the amount of nedomol in the plate preparation system. With a ball drum mill in

0.5-1.0 times more than the initial fuel consumption for grinding, and the content of finished dust in it is 25–70%, then increasing the efficiency of particle separation by size ensures an increase in productivity of the dusting system by 15–20%.

Claims (2)

1. A centrifugal separator comprising coaxially arranged outer and inner cones, an inlet of the initial mixture, outlet pipes of small and large products, characterized in that, in order to increase the efficiency of the separation process by over-cleaning a large product in the inner cone and increasing productivity by preliminarily Selection of a part of a large product from the initial mixture in the outer cone, in the inner cone, windows with rotating plates are made, with the windows arranged circumferentially in one or several horizontal rows. 2. A separator according to claim 1, characterized in that cylindrical shells are mounted coaxially between the inner and outer cones according to the number of rows of windows, the upper part of each of which is adjacent to the upper edge of the corresponding row ok on the inner cone, and lower the part is located at the cutoff level of the inlet pipe of the initial mixture.