SU1494943A1 - Apparatus for cleaning gas from dust - Google Patents

Abstract

The invention can be used in the cement and other sectors of the industry and improves the efficiency and degree of gas purification, reduces energy costs, and also ensures separate removal of fine dust. The gas cleaning device has a conical body 1 with a tangential inlet 2 and an axial outlet 3 branch pipes. Dust separator 4 and dust hopper 5 with dust discharge pipe 6 installed coaxially in the case, located on the wide side of case 1, and also grill 7. Case 1 is equipped with a nozzle 8 in the form of a paraboloid of rotation mounted coaxially on the truncated top of the case 1 with an annular manifold 9 dust removal, which is located in the wide part of the nozzle coaxially with the conical wall of the housing 1 and is equipped with a pipe 10 dust removal. Acoustic generators are made in the form of two spark electrical arresters, one of which contains electrodes 11 mounted with a discharge gap between the focus and the top of the parabolic surface of the nozzle 8 and connected to the source 12 of the pulsed electrical power and the switching unit 13. The other discharge contains electrodes 14 placed in the housing 15, made in the form of a cap with a parabolic reflex surface, which is connected to the side wall of the housing 1 pipe 16, directed tangentially into a narrow part of the con cal body cavity. At the apex of the parabolic surface of the housing 15 there is a nozzle 17 for supplying purified gas. The discharge electrodes 14 are installed with a discharge gap in the focus of the parabolic surface of the housing 15 and connected to the source 12 and the switching unit 13. The latter is installed with the possibility of providing alternate connection of the electrodes 11 and 14 to the source 12. 1 Il.

Description

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located on the wide part of the housing 1, as well as the grid 7. The housing 1 is equipped with a nozzle 8 in the shape of a paraboloid of rotation mounted coaxially on the side of the truncated top of the housing 1 with an annular dust collector 9 that is located in the wide part of the nozzle housing 1 and is equipped with a nozzle 10 for removal of dust. Acoustic generators are made in the form of two electric spark gaps, one of which contains electrodes 11 installed with a discharge gap between the focus and the top of the parabolic surface of the nozzle 8 and connected to the source 12 of the pulsed electric power supply and the unit

switching 13. Another discharge contains electrodes 14, placed in the housing 15, made in the form of a cap with a parabolic reflex surface, which is connected to the side wall of the housing I pipe 16, directed tangentially into a narrow part of the conical cavity of the housing. At the apex of the parabolic surface of the housing 15 there is a nozzle 17 for supplying purified gas. The electrodes 14 of the discharge are installed with a discharge gap in the focus of the parabolic surface of the housing 15 and connected to the source 12 and the switching unit 13. The latter is installed with the possibility of providing alternate connection of electrons 11 and 14 to the source 12. 1 Il.

The invention relates to equipment for cleaning gases from dust and can be used in cement, metallurgical and other industries.

The aim of the invention is to increase the efficiency and degree of gas purification, to reduce the energy consumption of the process, as well as to ensure the separate removal of finely dispersed gas.

The drawing shows a diagram of the proposed device.

The device for cleaning gas from the pit contains a conical case 1 with tangential inlet and axial outlet nozzles 2 and 3, respectively, mounted dust collector (cone) 4 coaxially in the case and dust hopper 5 with nozzle 6 for dust removal and grid 7 from the wide part of the case.

Case 1 is equipped with a nozzle B, made in the form of a paraboloid of rotation and installed coaxially on the side of the truncated top of the case with an annular collector 9 of the drain nip, which is located in the wide part of the nozzle coaxially with the conical wall of the case and provided with a nozzle 10 for dust removal.

Acoustic generators include two spark electrical arresters, one of which contains electrodes I1, aiowleep mouth with discharge gap

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the rum between the focus and the top of the parabolic surface of the nozzle 8 and electrically connected to the source 12 of a pulsed electric power supply and the switching unit 13, and the other arrester contains electrodes 14 placed in a case 15 made in the form of a cap with a parabolic reflex surface that is similar to the side wall of the housing 1 pipe 16, Directed tangentially into a narrow part of the conical cavity of the housing in accordance with the direction of the inlet pipe 2.

At the top of the parabolic surface of the casing 15, the gas supply pipe o4vraieHHoro 17 is filled. The discharge electrodes 14 are connected to the source 12 and the switching unit 13.

The cone 4 in the upper part is drilled with perforation and provided with a nozzle 18 placed coaxially and with a gap to the outlet nozzle 3, which is installed at the top of the parabolic surface of the Nozzle 8.

The cone 4 is fixed with a UIHPOKHM base on the grid 7, which is mounted on the wide part of the hull I and the hopper 5.

The electrodes 11 of the discharge are fixed coaxially with each other R nozzles 3 and 18 (output and cone, respectively) with the formation of a discharge gap between the focus and the verified pair

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bolic surface nozzles 8 and zones of acoustic shade in the pipes. One of the electrodes I1 is connected to the source I2 of a pulsed electrical power with grounding, and the other electrode 1 1- is installed with electrical insulation and is connected to the other pole of the source 12 via the switching unit 13.

The discharge electrodes 14 are mounted in the housing 15 with a discharge gap in the focus of its parabolic reflex surface. One electrode 14 is fixed by holders in the cavity of the casing 15 and connected to source 12 with grounding, and the other electrode 14 is fixed with electrical insulation at the top of the parabolic surface of the casing 15, forms an acoustic shadow zone in the pipe 17 and is connected to the other pole of the source 12 through the unit 13 switching.

A high-voltage capacitor with a power generator with a voltage at the terminals V, energy of

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p yes QP and power W |. generator, providing spark discharges in discharge gaps of electrodes 11 and 14 with given power, energy and repetition frequency of discharges.

The switching unit 13 is installed with the possibility of providing an arc-free alternate connection of the electrodes 11 and 14 to the source 12 for the time of the spark discharges of the capacitor with a frequency of 6-20 connections / s.

The inlet 2 of the purge gas supply is installed on the wide part of the side wall of the housing 1 and directed tangentially into its cavity in accordance with the direction of the nozzle 16.

The outlet nozzle 3 for the removal of the purified gas is installed at the apex of the parabolic nozzle 8 in the zone of the acoustic shade created by the discharge discharge electrode II.

The device works as follows.

The purified gas through the pipe 2 serves in a wide part of the cavity of the housing 1 tangentially with a given speed and flow rate of gas supply.

The electrodes 11 and 14 through the switching unit 13 are connected alternately to the capacitor of the source 12 for the time of the spark discharge of the capacitor

tp 10-1c -frequency 6-20 connections

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Each time the electrodes 11 and 14 are connected to the source capacitor 1 2, a spark discharge of power WP V-IP and with energy in the discharge Qp Wp-tp occurs in the discharge gap of the electrodes, which excites the aerodynamic shock wave of the sound frequency range, mainly 20 kHz, power W8 0.8Wp with energy Qg 0.8Qp.

The shock of a spark discharge propagates in a gaseous medium in a straight line at a speed of 330 m / s, reflected and refracted.

The shock waves of the discharges, excited in the casing of the discharger 15, propagate from the discharge channel in radial directions, reach the parabolic reflector surface of the casing 15, are reflected from it, and in the form of beams of plane shock waves are directed along the acoustic axis of the casing through the nozzle 16 the narrow part of the cavity of body I is tangential. Reflecting many times from the side wall of the body, the waves circulate in its cavity in the direction of rotation of the gas flow and towards the axial movement of gas in the body.

Circulation of waves occurs along the chords of the lateral surface of the hull. At the same time, shock waves exert dynamic pressure on the gas flow and on dust particles in the direction of the propagation of an ox.

Under the action of shock-wave pressure, the annular rotation of the gas in the cavity of the housing 1 is enhanced, and the drilled particles are thrown onto the side wall of the housing, through which they flow through the grating 7 into the hopper 5.

The purified gas is pushed under the action of overpressure into the narrow part of housing I and into the nozzle 8,

The shock waves of spark discharges, excited in the discharge gap of the electrodes 11, propagate in the radial-axial directions in the nozzle B, reach its parabolic reflector surface, are reflected from it and in the form of beams of plane waves are directed into the cavity of the housing 1 - parallel to the forming shell wall.

In this case, the shock waves of the discharges in the area of the nozzle 8 exert a dynamic pressure on the gas flow and fine dust particles in the radial-axial directions, and drop the small pierced particles remaining in the gas on the nozzle 8 and into the annular collector 9 of the outlet dust, and the purified gas goes through the outlet nozzle 3.

With spark discharges, electrodes 11 create acoustic shadow zones in nozzles 3 and 18. As a spherical shock wave propagates, a discharge pulse emerges behind the wave front, under the action of which part of the gas enters the cavity of nozzle 8 through nozzle 18 from the cone cavity 4, where the purified gas passes through the cone perforation.

In the collector 9, fine fractions, dust under the action of the dynamic pressure of the shock waves flow down into the spout 10, from where they are removed. The coarse fractions of dust are removed from the hopper 5 through the nozzle 6.

Thus, the proposed device, in comparison with the known, increases the efficiency and degree of gas purification due to the repetition of the sound pressure pulses of the shock waves of the spark discharges on dust particles alternately in the radial axis and tangential directions of the vortex gas flow.

The power of each shock wave is 3-4 orders of magnitude higher than the power of a harmonious sound wave from;} a teacher of a known device, respectively, the sound pressure in it is 3-4 times the pressure of the harmonic waves.

The circulation of shock waves of discharges in the vortex circuit in the direction of gas rotation accelerates the rotation of the latter and throws the particles on the side wall of the housing. The particles are separated from the vortex gas flow by the action of both centrifugal forces and the pressure of the shock waves of the discharges.

Fine dust, partially penetrating into the dust separator 4, falls into the nozzle 8, where it is subjected to the impact of the shock waves of electric spark discharges that are generated in the nozzle.

The shock waves of the discharges propagate in the cavity of the nozzle 8 mainly in the radial directions. They cast fine particles of sandy onto the set-up wall 3 and into the collector 9.

In addition, the shock waves are reflected from the parabolic surface of the SUPPORT 8 and are directed to the housing 1 from top to bottom, where dust particles separate the dust particles in the vortex flow in the direction of the hopper.

Reducing energy costs is achieved due to the high concentration of energy in spark electric discharges and their shock waves.

Energy concentration in spark

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Short circuit exceeds the energy concentration of harmonious sound vibrations of a known device with equal power of the generator current source.

Separate removal of fine dust is achieved due to its separation in the nozzle 8 and the presence of a collector to remove dust from the nozzle.

Claims (1)

Invention Formula A unit for cleaning gas from a pshi containing a conical case with a tangential inlet and axial outlet nozzles, a hopper with a nozzle for discharging the pypi, as well as a dust separator concentrator located in the case and acoustic generators with wave radiators, characterized in that in order to increase the efficiency and degree of gas purification, reduce energy consumption and ensure the fine removal of fine dust, the casing is fitted with a nozzle mounted coaxially on the truncated top side, made in the shape of a paraboloid neither with an annular dust collector located in the wide part of the nozzle on the side wall of the body and a parabolic wave reflector connected to the side wall of the body with a nozzle tangentially directed into a narrow part of the body cavity, and the acoustic generators were made in the form of two spark electric arresters and are equipped with a power supply and switching unit for arresters connected to 9149А94310 with the possibility of alternately connecting the gap between the focus and the right electrodes, while the parabolic surface of the gadget of the one discharge genset has a set-up electrode, and the electrodes of the other gage are mainly in the output nozzle and dust collector a gap in the focus of the detector with a discharge gap in the ring-parabolic wave reflector.