RU2201279C2 - Device for entrapping dust and toxic gases - Google Patents

Abstract

FIELD: devices for entrapping dust and toxic gases. SUBSTANCE: proposed device includes housing with disks located inside it and provided with rectangular impact members rotating in opposite directions and arranged in concentric rows; proposed device is also provided with acceleration blades mounted over periphery of working member and loading and unloading branch pipes; loading branch pipe is provided with injector; impact members of two adjacent concentric rows are turned in way of rotation of disks through angle of 45 to 65 deg.; volute-shaped unloading branch pipe is divided by baffle into two passages; passage nearest to axis of rotation is communicated with atmosphere through entrainment separator and farthest passage used for discharge of suspension through hydraulic seal is communicated with loading branch pie through bypass. EFFECT: enhanced efficiency. 2 dwg

Description

 The invention relates to a device for wet dust collection with simultaneous absorption of harmful gases from dusty air streams emanating from industrial plants, and can be used in chemical, construction and other industries.

State of the art
Wet dust collectors are known in which the contact of gas with water occurs due to the rotation of the rotors.

Conventional centrifugal fans, on the rotors of which water is supplied, are used as wet dust collectors (P.A. Kouzov, A.D. Malygin, G.M. Scriabin. Dust removal of gases and air in the chemical industry. L., Chemistry, 1982 , 256 p.). Such wet dust collectors are designed to remove dust from the air removed by local suction when dustiness is not higher than 5 g / m ³ . The degree of dust removal on quartz dust reaches δ _{η = 50} = 0.3 μm.

The design of the device is known (VN Uzhov, A.Yu. Waldberg. Gas purification by wet filters. M., Chemistry. 1972, 248 p.), Containing a cochlear casing, inside of which we rotate a steel disk with round rods fixed on it - beats fixed motionless on the stator, vanes located on the outer circumference of the rotating disk for separating gases from water, and vanes creating a gas pressure for their further transportation. A mixture of gases and water gets between the rotating and fixed rods - bats and is thrown away by the blades to the walls of the casing. In this case, water is sprayed and, in contact with the gases, moistens the dust contained in them. The resulting precipitate goes into the drain channel, and the gases are bladed into the gas duct by the blades. The device is used for cleaning gases containing dust not more than 1.5-2.0 g / m ³ . The degree of dust removal on quartz dust reaches δ _{η = 50} = 0.3 μm.

A device is also known (A.S. N 854433, class B 02 C 7/06, 1981) comprising a cylindrical body. Inside the case, disk working bodies are installed. On the inner surface of the disks are fixed shock elements in the form of rectangular beats. Reflective strips and armor plates are fixed on the body. Impact elements of two adjacent rows are installed relative to each other at an angle of 10-25 ^o .

 All analogies can be used for dry grinding.

 The prototype of the invention is a device (A.S. N 854433, class B 02 C 7/06, 1981), comprising a housing, working bodies mounted therein with the possibility of opposite rotation, having shock bodies located on surfaces facing each other, arranged in concentric rows rectangular elements, accelerating blades located on the periphery of each working body. The housing is cylindrical in shape. The discharge pipe is located tangentially to the body and has the shape of a cylinder.

The disadvantages of this device are:
- the inability to use as a wet dust collector - absorber,
- the inability to conduct an internal classification of processed materials,
- low homogenization efficiency due to the design features of the attachment of shock elements on the surface of the disks.

 Thus, it is not known device for the simultaneous capture of solid particles and gases.

SUMMARY OF THE INVENTION
An inventive task is to create a device for collecting dust and harmful gases from gas-air flows.

The problem is solved by a device containing a housing with disks mounted in it with the possibility of opposite rotation, having rectangular shock-shaped shock elements located on each other in concentric rows, rotated in the direction of rotation by an angle of 45-65 ^o , accelerating blades mounted on the periphery a disk having a larger diameter, a loading pipe with nozzles installed in it and a cochlear-shaped discharge pipe divided by a partition into two channels, of which the axis is closest to the axis rotation is communicated through the droplet separator to the atmosphere, and the distant serves to withdraw the suspension through the hydraulic shutter and communicated through the bypass with the entrance to the device.

The combination of angles is selected so that the angle of reflection of the material when it hits the surface of the oncoming blade is directed towards the axis of rotation of the rotors, i.e., towards the incoming material. When the angle is greater than 65 ^{o the} efficiency of dust collection and absorption of gases does not improve.

 EFFECT: invention makes it possible to efficiently capture dust and harmful gases from gas-air flows of local exhausts.

Information confirming the possibility of reproducing the invention
The drawing shows a device for dust and gas collection.

The device comprises a housing 1, in which disk working bodies 2 are mounted on horizontal shafts 4. Flat shock elements 3 are installed on their inner surfaces, rotated in the direction of rotation of the disks by an angle of 45-65 ^o . On a disk of a larger diameter on the periphery, pressure blades 6 (fan blades) are installed. Nozzle 5 is installed in the hollow shaft. The discharge nozzle is divided by a partition into two channels 8 and 9. Channel 9 has a hydraulic shutter 10 and is communicated via bypass 7 to the loading nozzle of the device.

 The device operates as follows. Air containing dust particles and impurities of harmful gases is sucked into the device through the hollow shaft 4 due to the vacuum generated by the blades 6. At the same time, sprayed liquid is supplied through the nozzle 5 to the device, which is necessary for gas absorption and wet dust collection. Under the influence of shock elements moving towards each other, the mixture disperses, which leads to an increase in the rate of chemical reactions. Having passed successively all the rows of elements 3, the finely dispersed and homogenized mixture is accelerated by the pressure blades 6. In the process of relative movement along the blades 6, the process of absorption of gases continues and the process of separating the liquid and solid phases from the gaseous due to inertial forces. The mixture containing solid particles and liquid enters the channel 9 and then through the shutter 10 is removed from the device. Part of the gas that entered the channel 9, through the bypass 10 again enters the input to the device. The gaseous phase enters channel 8 and is then released through the droplet separator into the atmosphere.

Claims (1)

A device for collecting dust and harmful gases, characterized in that it is provided with a housing with disks mounted in it with the possibility of opposite rotation, having rectangular shock-shaped elements arranged in concentric rows on the surfaces facing each other, accelerating vanes mounted on the periphery of the disk, having a larger diameter, a loading nozzle and an unloading nozzle installed in the nozzle of the loading nozzle, while the shock elements of two adjacent concentric rows rotated in the direction of rotation of the disks by an angle of 45-65 ^o , the discharge pipe is made in a coiled shape and is divided by a partition into two channels, of which the closest to the axis of rotation is communicated through a droplet separator to the atmosphere, and the distant serves to discharge the suspension through a hydraulic shutter and communicated via bypass with loading branch pipe.