SU915904A1 - Centrifugal separator - Google Patents

Description

The invention relates to devices for separating dispersed particles from a gas stream using centrifugal forces and may find application in various industries,

Known inertial separator containing a separation chamber's inlet pipe, pipe for drainage of the purified gas stream, pipe for dust output [1).

The disadvantages of the separator are large dimensions and low gas cleaning efficiency.

Known centrifugal separator ₁₅ comprising a semicircular separation chamber with a rectangular cross section inlet, nozzle discharging purified gas stream and a nozzle for withdrawal of dust inlet koto- _m ing plates mounted grille ugolovogo profile directed, rib transverse movement of the gas flow F2]. ·

2

Installing the plates with an edge across the gas stream creates additional turbulence. Reducing the cleaning efficiency of the gas stream.

The purpose of the invention is to increase the efficiency of separation by reducing secondary entrainment.

This goal is achieved by the fact that in a centrifugal separator containing a semi-annular separation chamber of rectangular cross section with an inlet nozzle, a nozzle for draining the cleaned gas stream and a nozzle for dust, at the entrance to which is installed a grid with angular profile plates, staggered, overlapping each other.

In addition, the plates are provided with longitudinal ribs attached to

the tops of the corners.

3 915904 4

Fig, 1 shows a centrifugal separator; in fig. 2 shows section A-A in FIG. one.

The separator contains a semi-circular separation chamber 1 of rectangular $ section, a pipe 2 for introducing a dusty gas stream, a pipe 3 for draining the cleaned gas stream, a pipe 4 for dusting, a grid with 5 corner profiles and 10 longitudinal ribs 6. The plates 5 are installed in a staggered manner overlapping each other, and their longitudinal curvature is equal to the curvature of the outer wall of the separation chamber. 15

Centrifugal separator operates as follows.

The dusty gas flow through the inlet nozzle 2 is introduced into the separation chamber 1. Dust particles, whose specific weight exceeds the pelvic flow, are thrown off to the outer wall of the separation chamber by the centrifugal forces and moving further over the grate plates 5, 25 are separated from the gas flow and fall into the pipe 4, and the purified gas stream is discharged through the pipe 3. At the same time the installation of the plates of the corner profile in a checkerboard order-. 30 ke, overlapping each other, eliminates the capture of dust particles by the gas stream, since the particles rising upward with the gas flow hit the inner surface of the corners and are thrown back into the nozzle 4, and the installation of longitudinal ribs reduces the turbulence of the gas flow at the nozzle inlet four.

The design tests are carried out on a 40 model installation with an internal diameter of 200 mm separating chamber, a rectangular section height of 100 mm separating chamber and a width of 100 mm with a rectangular 45 section of a branch pipe for dust extraction 250x100 mm, at the entrance to which is installed a grid with angular profile plates located in staggered order, overlapping each other, and having the following dimensions: plate length 250 mm, side angle 40 mm, the distance between the plates (their edges) 30 mm, the number of plates 3 pcs.

B, as a dusty environment, a soot-air mixture is used with an inlet flow rate of 360 nm ^ / h (supplied at a speed of 10 m / s) at a soot concentration of 9.1 g / nm \ Soot concentration in the gas stream at the outlet. Of the separator is 0.7 g / nm ^.

The cleaning efficiency calculated by the well-known method [1] is 92.3% versus 90.1% of the known device [2], the studies on which are carried out under other equal conditions.

Claims (2)

Claim 1. Centrifugal separator containing a half-ring separation chamber of rectangular cross section with an inlet nozzle, a nozzle for draining the cleaned gas stream and a nozzle for dust, at the entrance to which a grille with angled profile plates is installed. This is due to the fact that, in order to increase the efficiency of separation by reducing secondary entrainment, the plates are installed along the direction of movement of the gas flow in a staggered manner, overlapping each other. 2. Separato on π. 1, that is, the plates are provided with longitudinal ribs attached to the tops of the corners.