SU869797A1 - Filter for cleaning gases from black carbon - Google Patents

Description

I

The invention relates to a device for collecting dust and can be used in the industry for the production of carbon black for its separation from a particulate aerosol.

A granular filter is known that contains sections comprising chambers of compressed and purified gases, between which is placed a layer of granular material made of sand, gravel, rubber, vinyl plastic, graphite, sawdust, collectors for feeding dust and removal of purified gases and a device for regenerating granular material.

The drawbacks of such a filter are the possibility of contamination of the target product soot from gases with soot particles, which are not allowed in soot by the GOST, and also the efficiency of gas purification from carbon dioxide is low.

The aim of the invention is to increase the efficiency of soot.

And ensuring the purity of the emitted soot.

The goal is achieved by the fact that a cyclone chamber is installed coaxially with it between the dust gas collector and the dust gas chamber with a layer of grainy material, made, for example, in the form of a glass opened in the dust gas chamber and connected with a dust collector with a tangential steam tube diameter of the pre-chamber (smaller side of the pre-chamber in the form of a parallelepiped) d (0,2-1,0) 1), where 1) the diameter of the chamber of dusty gas

15 (smaller side of the parallelepiped gas chamber).

The ratio of the height of the granular layer, made of dry carbon black pellets, to the height of the chamber of dusty hectare 30 (il / H) is preferably 0.1-0.5.

Claims (5)

The dust gas collector can be made in the form of a channel of variable section along the length with confused sections connected to the tangential inlet pipes of the chamber with slit windows that are located in the vertical planes of the smaller bases of each confuse angle of 10–80 °. The installation between the collector and the gas chamber of the cyclone prechamber allows pre-coagulation of the aerosol, coarsening of the soot aggregates of particles, which in turn makes it possible to increase the filtration rate of the aerosol, reduce the size of the filter and reduce the cost of soot release from the aerosol. The diameter of the cyclone chamber is equal to the minimum value of p, 2 35 at low concentrations of soot in the dusty gas (aerosol) and high particle dispersion when it is necessary to ensure a high rate of flow swirl in front of the dusty gas chamber. However, the use of a prechamber with a diameter of less than O, 21) is impractical, since this leads to an increase in the hydraulic resistance of the prechamber and the destruction of the surface layer of dry soot granules by a vortex of dusty gas. With a high concentration of soot in the aerosol, when the aerosol is intensively coagulated, the diameter of the prechamber can reach a value. The ratio of the height of the layer of granular material to the height of the compressed gas chamber C 1 / H) is 0.1-0.5, and with, 1 it is not impossible for the granules from the layer to regenerate, and for 5 it is difficult to regenerate the layer with a low gas velocity regeneration J; an increase in the gas velocity of the regeneration layer does not exclude the destruction of the granules. The implementation of a filled gas collector in the form of a variable-length channel with cross-section confused zones connected to the pre-chamber tangential inlets of the slit with visible windows that are located in the vertical planes of the smaller bases of each confuser allows the carbon black filter to be separated from highly concentrated aerosol, How is the inertial effect used when most of the black particles slips through the slit windows and is discharged from the collector of the filled gas With a part of the aerosol through its exit th pipe. The angle of confusion is equal to Yu at a high concentration of soot in the aerosol and 80 at a low concentration of soot in the aerosol. The use of d ICP is not advisable, since this sharply increases the hydraulic resistance of the collector of dusty gas, AC 780 is also impractical because it leads to a higher pressure of the gas that generates the layer. FIG. Figure 1 shows the proposed filter with cylindrical sections and prechambers, side view; in fig. 2, section A-A in FIG. IJ in FIG. 3 section bb in fig. 2; in fig. 4 is a side view of the filter with sections and parallelepiped prechambers; in fig. 5 shows a section B-B in FIG. four; in fig. 6 - section G-Y in FIG. 5, The filter contains an inlet 1, a collector. 2 filled gas, in the vertical plane of the confused .. areas J of which windows 4 are located, connected to chambers 5 installed on the same axis with sections 6 of the filter. Each section 6 is divided into chambers 7 and 8, respectively, of dusty and cleaned gases with a layer of 9 dry carbon black pellets located on the carrier grid 10. Chambers 8 are connected by throttle valves 11 to pneumatic drives and automatic control devices with a clean gas collector 12 and a gas regenerator 13 with gas the fan 14. The collector 2 ends with the nozzle 15 for soot extraction, and the pre-chambers 5 are provided with hatches 16 for loading the dry soot pellets into the bed. Particulate aerosol is fed through pipe 1 into the collector 2 at a speed of 20-30 m / s. In sections 3 of this collector, the flow rate of the aerosol increases and in the vertical plane of the smaller bases of each confuser reaches 30-40 m / s. At the same time, a part of the aerosol from the collector 2 is fed through the windows 4 into the prechamber 5, of which the aerosol in the forward translational space from top to bottom (with a rectangular section of the prechamber) or translational. The rotational flow (with a cylindrical prechamber) is directed to the filter section 6. In sections 6, divided into chambers 7 and 8 with a granular layer 9 of soot granules with a diameter of 1-2 mm, a bulk density of 300-600 kg / m and a height of 100-200 mm, the aerosol is passed at a speed of 0.1-0.8 m / from the top down through the layer 9j located on the grid 10. At the same time, the soot aggregates of particles are deposited in the layer of dry carbon black pellets, and the cleaned gas is led through the chambers 8 and the shutter 11 to the collector 12. The regeneration of the layer 9 ° is carried out in 10-60 min as it is filled with particulate aggregates of particles emitted from an aerosol. At the same time, the valve 1 1 connecting the chamber 8 to the collector 12 closes, and the valve that connects the camera 8 to the collector 13 is opened. The cleaned gas from the collector 12 is supplied by the fan 14 through the collector 13 and the valve 11 into the chamber 8 under the grid 10 .. The use of this grid with 0.1-0.2 mm cells allows the regeneration gas to be evenly distributed over the volume of layer 9. At the rate of gas in the layer equal to 0.3-0.6 m / s, the soot separated in layer 9 is removed from chamber 7 through the shape of chamber 5 and window 4 into the collector 2 for 30-60 seconds. Next, the valve 11,, connecting the chamber 8 to the collector 1 is closed, and the valve that connects the camera 8 to the collector 12 is opened. Thereafter, the regeneration of the layer 9 is carried out in the next section of the filter. The soot removed from the layer during its regeneration is removed from the collector 2 with a part of gas (10-15% of the total aerosol consumption) through pas. tubes 15 and directed to the granulation. As required, in order to maintain the height of layer 9 equal to 100200 mm, dry sand granules are loaded into it through the hatch 16 in the upper lid of the pre-chamber 5 at the moment of regeneration of this layer. 7 claims 1. A filter for purifying gases from soot containing sections comprising chambers of dusty and purified gases, between which a layer of granular material is placed, collectors for supplying dusty and removal of purified gases and a device for regenerating granular material, characterized in that the aim is to increase the efficiency of soot collection and to ensure the purity of the emitted soot, each section is provided with a pre-chamber located between the dust-gas collector and the dust-launcher chamber. 2. Filter pop. ), characterized in that the prechamber is designed as a cup, the ratio of which diameter to the diameter of the chamber of dust-laden gas is 0.2-1.0. 3. The filter according to claim 1, characterized in that the prechamber and the dusty gas chamber are parallelepiped with the ratio of the smaller side of the pre-chamber to the lower side of the dusty gas chamber 0.2-1.0. 4. The filter according to claim I, characterized in that the ratio of the height of the layer of granular material to the height of the chamber of dust-laden gas is 0.1-6.5. 5. The filter according to claim 1, characterized in that the collector is in -. Dust gas is made in the form of a variable channel along the section. Sources of information (ation, which are straightforward in the examination 1. Uzhov V.N. Gkov B.C. Cleaning of industrial gases with filters. M., Himi, 1970, p. 270, fig. VV, 6. Cleansing Coskff fj Lijl .b