SU1692658A1 - Dust separator - Google Patents

Abstract

The invention relates to equipment for the dry cleaning of gas from dust and can be applied in various sectors of the national economy. The purpose of the invention is to increase the efficiency of dust collection and operational reliability. Above the nozzles 6, a ring with an inner diameter of 0.75-0.8 diameters of the separation chamber is fixed in the separation chamber, and between the ring and the distribution chamber a truncated cone 12 with an angle of inclination of at least 65-70 & at the same time, in the lower wall of the distribution chamber, in the immediate vicinity of the nozzle to remove the cleaned gas, holes are made connecting the distribution and separation chambers, and an annular ejector is located in the distribution chamber Dust gas from the space between the ring and the distribution chamber, in addition, in the upper part of the bunker there is an annular chamber 15 with an annular gap and a tangential nozzle for feeding and twisting inert gas into the bunker to prevent self-ignition of trapped dust. 4 il. CO with Os yu (cl 00

Description

The invention relates to equipment for the dry cleaning of gas from dust and can be applied in various sectors of the national economy.

The purpose of the invention is to increase the efficiency of dust collection and operational reliability.

Figure 1 shows a dust collector, a general view; figure 2 - node I in figure 1; on fig.Z - node II in figure 1; figure 4 - section aa in figure 1,

The dust collector comprises a housing 1, axial nozzles for supplying 2 cleaned and exhausting 3 purified gas, a swirler 4, a distribution chamber 5 with secondary gas nozzles 6, equipped with an inlet 7, a central tube 8, a hopper 9 with a nozzle 10 for removing the collected dust, installed above the nozzles 6 on the wall of the separation chamber 1 a ring 11 with an inner diameter of 0.75-0.8 diameters of the separation chamber, fixed above the ring 11 on the nozzle 3 of the clean gas outlet with a smaller base upwards a truncated cone 12 with an angle of inclination n less than 65 °. In the lower wall of the distribution chamber in the immediate vicinity of the nozzle 3 for removing the cleaned gas, holes 13 are made and an annular ejector 14 is installed to remove the dusty gas from the space between the ring 11 and the distribution chamber 5. At the wall in the upper part of the bunker 9 there is an annular chamber 15 with tangential the inlet gas inlet nozzle 16 and the annular outlet 17 directed downwards.

Dust collector works as follows.

The gas to be purified is supplied to the all-parting chamber 1 of the dust collector by two oppositely swirled in one direction flows through the pipes 2 and 7, the swirler 4 of the first flow, the distribution chamber 5 and the nozzles 6. The cleaned gas is removed through the pipe 3, and the collected dust is removed from the hopper 9 through the nozzle 10. As a result of the fact that the rotation radius of the flow decreases as the gas flow exits the separation chamber 1 through the nozzle 3, the speed of its rotation in the zone above the nozzles increases. At the same time, the elusive dust will be thrown by centrifugal forces to the wall of the separation chamber 1 between the ring 11 and the distribution chamber 5. As a result of braking on the wall of the distribution chamber 5, the gas flow near this wall together with the separated dust moves to the nozzle 3 and is removed through the holes 13 with help

ring ejector 14 in the distribution chamber 6, and then through the nozzle 6 into the separation chamber 1 together with the second stream.

This design solution significantly reduces the removal of dust from the separation chamber 1 and increases the efficiency of the dust collector,

The separated dust, along with part of the gas to be purified, enters the hopper 9, in which the gas flow continues to rotate slowly. At the same time, the bunker 9 is fed through the pipe 10 into the annular chamber 15 swirled in the same direction as the cleaned inert gas (for example, carbon dioxide, nitrogen, etc.) flowing through the annular slot 17 into the near-wall zone, i.e. in the zone of maximum concentration of collected dust. This dust will settle in

0 of the lower part of the bunker 9, while all the pores of the dust layer are filled with inert gas, which reduces the likelihood of dust self-ignition and increases the operational reliability of the device.

5 Investigations of the effectiveness of the dust collector conducted on dust of bentonite clay, selected from the aspiration system (dust density 2000 kg / m3, average particle size 18 µm) under the following conditions:

Gas consumption, m / h:

total150

first stream-100

second stream50

5 inert gas0,6

Dust concentration, g / m3: at the inlet of the first stream2-5

at the entrance of the second stream 0.02

have shown that the efficiency of the known vortex dust collector is 98.2, the proposed 99.5%, and the pressure loss is 1070 and 1100 Pa, respectively.

Claims (1)

DETAILED DESCRIPTION Dust collector comprising a body 5 axial nozzles for supplying cleaned and discharging purified gas, swirler, distribution chamber with secondary gas inlet nozzles, central tube, hopper with nozzle for removing trapped dust, 0 characterized in that, in order to increase dust collection efficiency and increase operational reliability, it is equipped with a ring above the nozzles on the wall of the separation chamber with an inner diameter of 0.75-0.8 of the diameter of the separation chamber and fixed above the ring on the nozzle for removal of purified gas a smaller base upwards with a truncated cone with an angle of inclination of at least 65 °, while In the lower wall of the distribution chamber, in the immediate vicinity of the nozzle for exhausting cleaned gas, holes are made and an annular ejector is installed to remove the dusty gas from the space between the ring and the distribution chamber, and is also provided with an annular chamber with a tangential inert gas inlet near the wall in the upper part of the bunker and with a downward facing annular outlet. 15 2 j gas