RU2447923C1 - Dust trap - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to cleaning gas of dust and may be sued in heat engineering, metallurgy, production of construction materials etc. Dust trap comprises case with cover accommodating axial dusty gas feed branch pipe, swirler made up of hollow disk housing shaped vanes, truncated-cone shield arranged under said swirler and with its smaller base located on disk outer bottom edges, and axial cleaned gas discharge branch pipe. Cover is made integral with swirler. Dusty gas feed branch pipe is arranged atop dust trap cover, along its axis. Cleaned gas discharge branch pipe extends through case bottom.

EFFECT: higher efficiency, lower power consumption, ease of dust trap manufacture.

2 dwg

Description

The invention relates to devices for cleaning gases from dust, and can be used in chemical, pharmaceutical, food, construction and other industries.

Known dust collector (autosw. No. 289817, IPC 5 B01D 45/12, 1971), comprising a housing, an axial nozzle for introducing dusty gas in it, at the upper end of which a swirl is installed, an axial nozzle for removing purified gas.

The disadvantage of this dust collector is the low dust collection efficiency, especially for fine dust.

Closest to the described invention is a dust collector (RF patent No. 2144416, IPC B01D 47, Bull No. 2, 01/20/2000), containing a housing placed in it an axial nozzle for introducing dusty gas, at the upper end of which is installed a swirl made in the form a hollow disk with profiled blades rigidly fixed in it, a truncated cone screen located under the swirler and a smaller base fixed along the outer edge of the disk, an axial outlet pipe for purified gas, mounted concentrically on the outside of the inlet pipe dusting gas.

The disadvantages of this dust collector are

1) low dust collection efficiency due to secondary entrainment of fine dust in the exhaust gases;

2) the complexity in organizing the flows of purified and purified gas inside the apparatus and additional energy costs for the supply and withdrawal of gas flows.

The task of the invention is to increase the efficiency of the dust collector, reduce energy consumption, simplify manufacturing technology and increase reliability.

The problem is solved in such a way that in a dust collector containing a housing, an axial nozzle for introducing dusty gas supplied from above the apparatus, a swirler made in the form of a hollow disk with rigidly fixed shaped blades placed in it and combined with the apparatus cover, the screen in the form a truncated cone (or cylinder), and located under the swirl and a smaller base fixed along the outer lower edge of the disk, the housing has a bottom through which the purified gas pipe is discharged.

Figure 1 presents a General view of the dust collector; figure 2 is a section aa.

The dust collector includes a housing 1 with a swirl 2 placed in it, made in the form of a hollow disk and consisting of an upper, combined with the lid of the apparatus 3, and a lower wall 4, between which profiled blades 5 are located. Along the axis of the housing 1 on the lid there is a dusty inlet pipe 6 gas. Under the swirler 2 along the axis of the casing is installed a pipe 7 of the outlet for purified gas, the lower part of which is located in the bottom 8 of the casing. On the outer lower edge of the swirl 2 is mounted a screen 9 in the form of a truncated cone (or cylinder). In the lower part of the bottom of the body there is a pipe 10 for collecting dust that is connected to the hopper for collecting 11.

The dust collector operates as follows. Dusty gas through the inlet pipe 6 enters the swirl 2. The separation of dust particles in a swirling flow under the action of centrifugal forces begins with the swirl 2 when flowing around the profiled blades 5, then most intensively in the space between the screen 9 and the housing 1. The purified gas leaves the apparatus through the pipe 7, the lower part of which is located in the bottom 8 of the housing. The location of the inlet pipe of the dusty gas 6 in the dust collector cover allows to reduce the gas flow rate in the inertial forces (between the end of the screen and the beginning of the pipe) in this space compared to the prototype and thereby reduce the secondary ablation of fine dust particles, which increases the efficiency of the dust collection process.

In addition, the upper location of the dusty gas inlet pipe, as well as the outlet of the cleaned gas pipe from the apparatus through the bottom of the body, allows you to free the flow area of the captured dust outlet pipe 10 and greatly simplify the design of the dust collector.

The proposed design solution simplifies the manufacturing technology of the dust collector, reduces the cost of installation and welding, and also reduces the metal consumption of the apparatus, which increases the main economic indicators.

Claims (1)

A dust collector comprising a housing with a lid, an axial nozzle for introducing dusty gas placed therein, a swirl made in the form of a hollow disk with rigidly fixed shaped blades placed in it, a screen in the form of a truncated cone located under the swirl and a smaller base, fortified along the outer lower edge a disk, an axial outlet pipe of the purified gas outlet, characterized in that the cover is made combined with the swirl with rigidly fixed profiled blades placed in it, the inlet pipe dust gas is placed on top of the dust collector cover along its axis, and the purified gas pipe is discharged through the bottom of the housing.

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