RU2596247C1 - Device for cleaning dusty gases - Google Patents

Abstract

FIELD: gas industry.

SUBSTANCE: invention relates to cleaning gas from dust and solid particles and can be used in cement, chemical, metallurgical, mining, coal, construction and other industries. Device for cleaning gases comprises a housing in form of a cylindrical shell, inside of which on an engine shaft there is a centrifugal rotor, in form of a stack of discs with central cavity, linked with coaxially installed inlet pipe, intended for inlet of dusty gas into central cavity of stack of discs, and outlet pipe is arranged on periphery of cylindrical shell and is intended for discharge of cleaned gas. Device is equipped with dust collector. Between cylindrical shell of housing and a stack of discs coaxially with a gap there is an additional shell, walls of which are made in form of vertical shutters with flaps deflected to periphery and which divides space between wall of housing and stack of discs into two annular concentric channels, one of which is intended for discharge of cleaned gas, other - for discharge of dust.

EFFECT: high efficiency and degree of cleaning gases.

1 cl, 2 dwg

Description

The invention relates to techniques for cleaning gases from dust and particulate matter and can be used in cement, chemical, metallurgical, mining, coal, construction and other industries.

A device for cleaning air from solid and liquid aerosols according to patent RU No. 2229658. The device comprises a housing with inlet and outlet nozzles and windows for the removal of detachable particles, and a multi-disk rotor. The inlet pipe of the device is made curved and located so that together with the outlet pipe they occupy a sector on the device case of less than 90. The disk rotor is placed in an additional shell, forming a channel for exhausting gas and separated particles through the case through windows made in the additional shell and placed in series starting from the inlet to the outlet, and the size of the windows sequentially increases. EFFECT: increased productivity of the device and quality of air purification from solid particles. The disadvantage of this device is that as the device transporting gas, the so-called diametral disk fan having a low (low) head, which makes it difficult to use in aspiration systems. A small number of windows for the removal of particles leads to the fact that moving along the shell from one window to another, the particles are exposed to the vortex flow of gas generated on the surface of the shell, and again fall into the stream of gas to be cleaned.

Closest to the proposed invention is a device for wet cleaning of gases according to patent RU No. 2283684. The device comprises a housing, inside of which a disk pack, an inlet and an outlet pipe, and a dust collector are mounted rotatably mounted on a shaft. A package of disks is installed between the end flanges, smoothly turning into conical shells with the possibility of synchronous rotation with the disks and forming a dusty gas stream separation channel between the outer and inner shells, the exit from which ends with a gap directing the cleaned gas stream to the outlet pipe, and the separated dust particles - in the dust bag. The conical shells are not mechanically connected to the outlet pipe and dust collector. Depending on the physical properties of the materials to be separated, the inner and outer conical shells have the same angle of inclination to the axis of rotation, which is in the range 0 <α <90 °, or the inner and outer conical shells have different angles of inclination to the axis of rotation, but within 0 < α <90 °. Effect: increasing the efficiency and degree of purification of dusty gas. The disadvantage of this device is that, depending on the type of particles to be separated, it is necessary to change the design dimensions of the device, which makes it difficult to widely use the device for cleaning industrial gases and air. In addition, the particles, continuing to move along the wall of the conical channel to the exit slit, are exposed to the action of gas turbulized in the boundary layer, which causes them to return to the stream of gas being purified.

The present invention solves the problem of increasing the efficiency and degree of purification of dusty gases.

To achieve the aforementioned technical result, a device for cleaning dusty gases is proposed, which comprises a housing, inside of which a centrifugal rotor mounted in the form of a packet of disks with a central cavity, inlet and outlet nozzles, and also a dust collector is mounted on the motor shaft with rotation. In contrast to the known device, the device according to the invention is characterized in that it contains a pack of disks with a central cavity connected to an axially mounted inlet pipe designed to introduce dusty gas into the central cavity of the disk package, and the output pipe is located on the periphery of the cylindrical shell and is designed to discharge purified gas , also the device is equipped with a dust collector. According to the invention, an additional shell is installed between the cylindrical shell of the casing and the disk pack coaxially with a gap, the walls of which are made in the form of vertical louvers deflected to the periphery of the sash, and which divides the space between the wall of the housing and the disk pack into two annular concentric channels: one is for output purified gas, another to remove dust.

The proposed device is intended for dry cleaning of gases with any degree of dustiness of gas by particles having a size from a few microns to fractions of a millimeter, in the temperature range from minus to plus a few hundred degrees. However, this device does not require an additional fan for pumping purified gas.

These features are not identified in other technical solutions when studying the level of this technical field and, therefore, the solution is new and has an inventive step.

In FIG. 1 shows a General view of a device for cleaning dusty gases, FIG. 2 is a section AA illustrating the location of the blinds.

The device consists of an inlet pipe 1, a set of flat annular disks 2 with a central cavity 3, an outer shell 4, which is an element of the housing, an inner shell 5, having blinds 6. A set of disks is mounted on the shaft 7 of the drive 8. The outer shell 4 and the inner 5 form a channel 9 to output the separated particles to the drive 10. The cleaned gas stream through the channel 11, formed by a set of disks and a shell 5, through the holes 12 in the flange of the housing 13 enters the muffler 14 and the outlet pipe 15.

The device operates as follows.

The dusty gas flow through the inlet pipe 1 enters the central cavity 3 of the set of annular disks 2, is carried away by the disks due to viscous friction into rotational motion and is accelerated by centrifugal forces in the direction along the radius of the disks. Coming out of the channels between the disks, together with accelerated gas, the particles continue centrifugal movement to the shell 5, exit through the openings in the blinds 6 to the output channel of the separated particles 9 and accumulate in the particle storage 10. Gas without particles enters through the channel 11 and openings 12 in the flange case 13 into the muffler 14, where it can be used to cool the electric drive 8, and is thrown out through the outlet pipe 15.

Using the proposed device can improve the efficiency and degree of purification of dusty gas, which is confirmed by the results of experimental studies. This is ensured by the fact that after contact with the surface of the blinds, the particles are practically immediately removed from the gas stream and enter channel 9, where the gas does not participate in rotational or translational motion through the blinds due to the equality of the gas pressure in channel 11 and channel 9. Gas flow through there are no louvers 6, therefore, the particles cannot return to the gas flow in the channel 11. Then, under the action of gravity, the particles are showered into the reservoir 10. To test the operability of the proposed technical solution, it was made and tested mock purification plant, which had the following characteristics:

- speed - 3000 rpm

- disc diameter - 300 mm

- consumption of purified air - 160 m ³ / hour

Tests have shown that air dusted with particles of cement grade 400, is cleared by 98-99%.

Information sources

1. Patent RU No. 2229658, IPC F24F 3/16, 2004;

2. Patent RU No. 2283684, IPC F24F 3/16, 2006 - prototype.

Claims (1)

A device for cleaning dusty gases, comprising a housing in the form of a cylindrical shell, inside of which a centrifugal rotor is mounted on the motor shaft, made in the form of a pack of disks with a central cavity connected to an inlet pipe coaxially mounted for introducing dusty gas into the central cavity of the disc pack, and the outlet pipe is located on the periphery of the cylindrical shell and is designed to output purified gas, the device is also equipped with a dust collector, characterized in that between An additional shell is installed coaxially with a gap by the shell of the case and the disk pack, the walls of which are made in the form of vertical blinds with flaps deflected to the periphery and which divides the space between the wall of the housing and the disk pack into two concentric annular channels, one designed to discharge purified gas, the other - to remove dust.

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