RU1782667C - Spiral dust collector - Google Patents

Abstract

Usage: in various industries, industry for dust removal of gases. SUMMARY OF THE INVENTION: The spiral separation channel 1 has inclined walls 2 and a bottom 4, in which a spiral dust extraction gap 5 and an ejection hole 7 are made. Spiral guides are attached to the edges of the gap below, forming a dust-lowering channel 6 open in the cavity of the hopper 3. 2 ill.

Description

1 ULO & PE for dust

Figure 1

The invention relates to a dust removal technique for gases and can be used in various industries.

A high-speed dust collector is known, comprising a housing, a tangential inlet pipe, a spiral flue with a bottom having openings for removing the separated dust, and a confuser mounted under the central opening of the bottom, an axial exhaust pipe and a dust collector located under the spiral casing of the housing, a reflective ring is installed above the confuser, and the dust-chipper is made in the form of a ring and a disk attached to the lower end of the confuser, between which blades are installed along the ring, the inclination of which coincides with the direction m twist spiral duct, the walls of which are inclined at an angle of 4-7 ° to the vertical,

A disadvantage of the known dust collector is that when dust is removed from the spiral channel in the area of the spiral gaps, turbulent pulsations arise (as a result of a sharp change in speed when the gas escapes into the hopper1), which facilitates the return of trapped particles to the separation zone, and particles that enter the exhaust pipe through the confuser , due to the short time of the action of centrifugal forces in the axial zone, characterized by rarefaction, not separating, they leave the separation zone of the dust collector.

The purpose of the invention is to increase the efficiency of the separation of fine dust due to pulsations in the area of the dust extraction slots and the post-treatment of a part of the gas.

This goal is achieved in that a spiral dust collector containing a separation channel with inclined walls, a bottom and a dust extraction spiral slot, it is provided with spiral guides attached to the dust extraction gap and an exit section located in the hopper, and an ejection hole is made in the bottom of the first turn of the separation channel at the inner wall of the latter.

In FIG. 1 shows a device, a longitudinal section; in Fig.2 - section aa in Fig.1,

The spiral dust collector consists of a separation channel 1 with inclined walls of 2 m and is separated from the hopper 3 by a bottom 4 with a dust extraction spiral slot 5. -. The dust collector is provided below the level of the bottom 4 with spiral guides forming a dust discharge channel attached to the dust of the left discharge slot 5, and an output section located in the hopper 3, and ejection holes 7 are made in the bottom 4 of the first turn of the separation channel near the inner wall of the latter. carried out through pipe 8, and the output through pipe 9,

dust is removed from the hopper through the nozzle 10. The bottom of the exhaust pipe 8 is blind.

The dust collector operates as follows

The dusty gas stream enters through the inlet pipe 8 into the separation channel 1, where it acquires a rotational movement. Under the action of centrifugal forces resulting from rotational

the movement of the gas stream, the separation of the solid and gas phases occurs, dust particles are discarded to the walls 2 of the separation channel and through a spiral gap 5 are removed through a spiral channel

b into the hopper 3 and removed through the pipe 10, the gas stream, being cleaned in a spiral duct, flows tangentially into the exhaust pipe extended downward. In this way, the intersection of the gas and

caught solid phases. The hopper 3 receives a small amount of gas transporting the captured dust. When leaving the spiral channel 6, the gas loses speed and through the opening holes 7 enters

again into the separation zone 1. As a result, the gas phase is refined from solid particles trapped in the hopper 3.

The invention consists in the installation of a spiral channel 6

on the extension of walls 2, which eliminates turbulent pulsations in the area of dust extraction slots, because in the spiral channel 6, a smooth, continuous flow of the dust-gas mixture is achieved, in contrast to the prototype, where

As a result of a sharp drop in speed when entering the hopper and the resulting inhomogeneity of the pressure field, the capture and return of trapped particles is enhanced. Making ejection holes 7

in the bottom 4 of the first turn of the separation channel allows to increase the time of the action of centrifugal forces on the particles trapped in the hopper (when moving along the turns of the separation channel 1). Location

the ejection holes 7 at the inner wall of the separation channel 1 are due to a known change in static pressure.

 The inventive spiral dust collector can significantly expand the scope due to; increased gas velocity: the possibility of stable operation in conditions of unsteady flow

gas to be cleaned; high performance

by eliminating radial runoff and suppressing secondary entrainment.

. Tests have shown that the effectiveness of the proposed apparatus under other conditions is on average 3-6% higher than that of the prototype.

Claims (1)

SUMMARY OF THE INVENTION A spiral dust collector comprising a separation chamber with a spiral separation channel, with inclined walls and a bottom having a spiral 4  Fig. G 0 dust extraction slot, hopper, characterized in that, in order to increase the efficiency of fine dust separation, it is equipped with spiral guides attached to the edges of the dust extraction gap from below, forming a spiral dust discharge channel open in the hopper cavity, and in the bottom on the first turn of the separation channel near its internal walls made an ejection hole.