RU1813577C - Swirl-type dust separator - Google Patents

Abstract

Use: for cleaning gases from dust. SUMMARY OF THE INVENTION: A swirler is installed in the apparatus at the interface between the primary and secondary flows, the plates of which form constricting channels directed towards the swirl of the flows. 2 ill.

Description

The invention relates to dust-cleaning equipment for cleaning gases from dust under the action of centrifugal force, under the influence of which suspended particles are thrown onto the inner surface of the apparatus and settle, and can be used in dry filters in the mining, energy and other industries.

The purpose of the invention is the separation of oncoming gas flows and an increase in dust collection efficiency, a decrease in the aerodynamic drag of the apparatus and, as a result, the energy consumption for the exhaust fan drive.

Figure 1 shows a General view of the device; figure 2 is a section aa in figure 1.

The counter-flow sweeping dust collector includes a vertical cylindrical housing 1. A cylindrical swirler 2 and a primary flow pipe 3 with a propellant 4 are installed inside the housing. A tangential nozzle 5 is provided at the bottom of the primary gas supply housing and a tangential nozzle is installed at the top of the secondary gas supply housing 6. The purified gas is discharged through the exhaust pipe 7. A baffle plate 8 is installed to reflect the secondary swirling flow, to collect dust-dust collector 9.

A dust catcher with an oncoming swirling stream works as follows.

The dusty gas stream supplied through the tangential nozzle 5, passing through the nozzle 3 with the displacer 4, twists and enters the space between the vanes of the swirler 2 of the cylindrical body 1. Here, due to the action of the displacers 4 with the cowl, the dusty gas stream forms an upwardly expanding cone.

The gas flow entering through the tangential pipe 6 forms an external wall flow directed downward towards the internal flow. From an external stream, dust particles are driven by centrifugal forces to the walls of the apparatus and rush to the lower part

ate

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with

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apparatus, while gas from the external flow in the lower part of the apparatus, reflected from the baffle plate 8, passes into the internal flow, thereby increasing its swirling speed. Under the influence of centrifugal forces, dust particles from the internal stream are thrown to the swirl plates, fall into the space between the plates and, under the action of the primary stream, are directed downward.

The purified gas is removed from the dust collector through the exhaust pipe 7.

The trapped material through the gaps formed by the baffle plate 8 and the housing 1 is removed to the dust collector 9. The slope of the baffle plate 8 is selected not less than the angle of repose of the material.

An example of a specific implementation.

The dust collector of the CDW for cleaning flue gas in an amount of 30,000 mg / h., At a temperature of 180 ° C, a density of flue gas RO 1.32 kg / m, dust density / 2000 kg / m3 has the following main, geometric and operational parameters: the diameter of the apparatus 1400 mm, case height 4300 mm, swirl plate height 2000 mm, plate width 160 mm; the inner edge of the plate is mounted on a circle with a diameter of 900 mm, the outer on a circle with a diameter of 3000 mm, the angle of installation of the plates is 30 ° (along the inner circle), the number of installed plates is 18 pieces; the plates are welded to the retaining rings at the top and bottom, the lower ring is abutted by the six supporting legs into the baffle plate, and three guides are welded to the locking rings to center the swirl. The diameter of the exhaust pipe is 900 mm, the diameter of the primary flow pipe is 600 mm, the cross-section of the secondary pipe inlet pipe is 300x900 mm,

section of the inlet pipe of the primary stream 200x750 mm.

At the specified sizes and given

gas velocity in the lower inlet will be 18.7 m / s, in the upper inlet

-19.8 m / s, gas velocity in the exhaust pipe

- 13.3 m / s, the degree of gas purification at a given fractional composition will be 98%. The main advantage of the proposed device in comparison with the known one is that a cylindrical swirler is installed between the exhaust pipe and the primary flow pipe in the housing of the device

prevents the rebound of particles from the inner walls of the cylindrical body to its center, improves the swirl of the secondary flow and, as a result, enhances the swirl of the internal (primary) flow, i.e.

separation of dust particles from it. All this improves the main technical and economic indicators (degree of gas purification, energy intensity). ; /. . . ; :;

Claims (1)

Formula invented and Vortex dust collector, including a vertical cylindrical housing with lower and upper tangential inlet nozzles of the primary stream, an exhaust pipe and a breaker washer, and the fact that, in order to ensure separation of oncoming gas flows, reduce aerodynamic drag and increase the efficiency of the gas purification process, an annular swirler is installed along the axis between the exhaust pipe and the primary flow pipe in the housing, the plates of which are arranged vertically and form channels that taper to the side swirls of primary and secondary flows.