SU1606154A1 - Inertial dust separator - Google Patents

Abstract

The invention relates to the purification of dusty industrial gases containing suspended solid fine particles, and can be used in the metallurgical, mining, chemical and other industries. The purpose of the invention is to increase the efficiency of cleaning waste gases with reduced aerodynamic drag of the dust separator. When cleaning the exhaust gases in inertial dust separators, the separated highly dusty gases are discharged to a separate dust cleaning unit. To clean the gases in this apparatus, increased energy costs are required for the entire cycle. In order to reduce the resistance of the entire gas cleaning plant and increase the efficiency of operation, it is advisable to trap the released dust in the dust separator housing from the gas stream circulating under its chipper. 1 tab., 1 Il.

Description

The invention relates to the purification of dusty industrial gases containing suspended solid fine particles, and can be used in the metallurgical, mining, chemical and other industries.

The purpose of the invention is to increase the efficiency of purification of waste gases with low aerodynamic resistance of the dust separator.

The drawing shows a diagram of the device, with a vertical arrangement with a hydraulic wash of the collected dust, a general view, a longitudinal section.

The device contains an inlet nozzle 1, an outlet nozzle 2, a curved duct 3, a bump stop 4 with water supply 5 and a guide plate 6, a slag outlet 7. The solid arrows indicate the direction of movement of the process gases in the dust separator; 4, and wavy - moisture for the spillway captured dust.

FIG. 1 shows the designations: A - the width of the outlet nozzle 2; and - the width of the bump 4; y is the angle of inclination of the bump 4 to the outer wall of the duct 3.

In accordance with the accepted designations, the claimed sizes of the device will be recorded: a (0.3 - 0.8) A

Od

about a

sd

four

P 30 - 80

, 0

The device works as follows.

Installing the baffle 6 with its standard sizes leads to the fact that two devices are combined in one housing: an inertial dust separator with the allocation of drunk particles. a circulating zone and a precipitating apparatus for trapping dust from the circulating gas stream.

The gases entering through the inlet nozzle 1 into the inertial dust separator, turning over in the gas flue 3 over 180 °, throw dust particles under the chipper 15. Particularly large particles collide with the surface of moisture flowing along the wall of the duct 3 and precipitate at the bottom of the dust separator. The fine dust from the 20 sieves under the bump stop 4 and, caught by the circulating gas flow, is directed along the upward trajectory to the gas flow reflux unit by means of the nozzle 5 and the guide 25 of the plate 6. If the dust dispersed particle is not contact with the surface of moisture, it is re-supplied to the irrigation unit along a circulating path. This happens until the particle enters the layer of near-wall moisture. In the case of transfer of dust particles in the lower part of the circulating flow to the process gases being cleaned, as they approach the striker 4, the particle is again thrown into the ascending part of the circulating flow under the action of inertial forces. With the right choice of sizes Q of the proposed device, the transfer of dust particles with waste gases to the outlet is practically minimized. This provides effective cleaning of flue gases at d lower compared to the prototype

aerodynamic resistance of the device.

A feature of the dust separator is the minimum contact of process gases with moisture supplied to their cleaning. The circulation zone separates the main gas flow from the contact With water, and the circulation flow is updated gradually. Therefore chilled35

5 0 5 о Q д

Q

five

The gas flow in the device is not developed and the water consumption for their purification decreases sharply.

These advantages lead to increased reliability and improved technical and economic performance of the main technological equipment, the quality of the finished product.

Conducted laboratory tests of the proposed device.

In the simulation of the prototype, the gas flow separated from the purified gases was cleaned in a scrubber model. The test proposed separator produced according to the scheme shown in the drawing.

Purification was subjected to process gases of sintering with initial dust content. 2 g / m and temperature. The velocity of the gases in the outlet nozzle (in the simulation of the prototype before the separation of the nozzles for clean and dirty gas) was chosen equal to 10 m / s.

In the course of the experiments, the total temperature was measured by the method of external filtration and the dust content of the exhaust gases, and the total aerodynamic resistance of the installation was recorded.

The results of the experiments are given in the table.

From the data presented in the table, it follows that to achieve the purpose of the invention, the adjacent walls of the curved duct and the outlet nozzle must be separated by 0.3-0.8 of its width by means of a chimney having a slope to the outer wall of the duct equal to 30-80 °.

Claims (1)

Invention Formula An inertial dust separator including a curved flue duct with inlet and outlet nozzles, characterized in that, in order to increase the cleaning efficiency of flue gases with reduced aerodynamic drag of the dust separator, the interfacial walls of the curved flue duct and the outlet nozzle are divided into 0.3-0.8 width bump, mounted with a slope to the outer wall of the duct at an angle of 30-80. Prev1520 22 523 78.85