SU1330328A1 - Foam generator - Google Patents

Abstract

The invention relates to the field of mining industry and is intended for extinguishing fires and dedusting technological processes. The purpose of the invention is to increase the efficiency of the foam generator and to adjust the angle of the air-liquid jet. The generator contains a conical case 1, at the apex of which a fitting (W) 2 is placed for supplying a foaming liquid, and at the base is a package of foam generating nets (CBC) and at an angle to its axis - W 3 for supplying compressed air. The intersection point W 3 is located on the slice W 2 installed from the ASG packet 4 at a distance determined from the mathematical relationship Е К d / tgo /, m, where i is the distance along the foam generator axis from the slice W to supply the foaming liquid to ASG 4, m; d - diameter of the OPO 4, m; 0 is the angle of inclination of Ш 3 to the foam-axis: rator in the direction of foam flow, equal to 30-40 ° C; K - coefficient of proportionality, equal to 0.45. The jet of compressed air supplied through W 3 captures from slice W 2 liquid and, mixing with it, creates a uniformly mixed gas-liquid jet, which, passing through CGM 4, forms a foam of high multiplicity by changing the air flow through W 3 the angle of the gas-liquid can be adjusted performance foam in a wide range and increase the multiplicity of the generated foam. 1 il. cl

Description

The invention relates to the mining industry and can be used in other branches of the national economy for extinguishing fires and dedusting technological processes.

The purpose of the invention is to increase the efficiency of the foam generator and reduce its metal intensity by increasing the ratio of foam and adjusting the angle of the air-liquid jet.

The drawing shows a foam generator, a longitudinal section.

The foam generator consists of a conical body 1, at the apex of which along the axis of the foam generator there is a fitting 2 for supplying the foaming liquid. Symmetrically to him at an angle with, equal to 30-DO °, several, for example, two are installed, nozzles 3 are supplied with compressed air. A package of foam generating grids 4 is installed at the base of the casing, the diameter d of which is set on the basis of the dust removal tasks. The cut of fitting 2 is located at a distance of 2 from the package of grids 4. A necessary condition for this design is the relative position of fittings: the intersection point of the axes of fittings 3 for supplying compressed air should be located at the cutting of fitting 2. Fittings 2 and 3 are connected to the trunk supply of compressed air and foaming fluid (not shown).

The foam generator works as follows.

The jets of compressed air supplied through the nozzle 3 capture a foaming liquid from the cut of the nozzle 2, which is supplied almost without a porn, and when they collide, they dissolve it and mix it, create a uniformly mixed gas-liquid jet, which, passing through the grids 4, forms high foam multiplicities.

When the intersection point of the air jets is displaced from the cut-off of choke 2 along the axis of the foam generator, the liquid flows from the choke into the body without spraying. When the jet intersection point is perpendicular to the axis of the foam generator, the atomizing torch will be uneven in the volume of the body. If the fittings are located at an angle of about (30 °, the degree and uniformity of spraying of the liquid decreases, and when the integrity of the gas-liquid flow is disturbed, its discontinuity in

center, which leads to lower pricing efficiency.

IMPORTANT is the location of the cut-off nozzle of the foaming fluid supply 2 at a certain distance 1 from the package of foam generating networks, determined from the mathematical relationship:

d

 ti7

I

to

where d is the diameter of foam generating

nets, m;

0 is the angle of inclination of the nozzles for supplying compressed air to the axis of the foam generator in the direction of the flow of foam, equal to 30-40;

K - coefficient of proportionality, equal to 0.45.

The proposed pyeogenetor design allows you to adjust the foam performance in a wide range by changing the air flow through fitting 3 at a constant angle of a gas-liquid jet, as well as to increase the multiplicity of the generated foam.

Due to the fact that the height and length of the body depends on the angle of inclination of the air inlets to the foam generator axis, the dimensions of the foam generator and its intensity of metal are significantly reduced.

Claims (1)

Invention Formula A foam generator, including a conical case, at the top of which a fitting for supplying a foaming fluid is placed, and a package of foam generating nets is installed at the base, and a fitting for supplying compressed air, characterized in that, in order to increase the cost-effectiveness of operation and reduce the metal consumption due to increasing the multiplicity of foam and the constancy of the angle of the air-liquid jet, it is equipped with additional fittings for supplying compressed air, while all the compass air supply nozzles are placed under the ANGLE to the axis in the direction of the foam flow, and the point of intersection of the axes of the fittings for the compressed air supply is located on the cut, the fitting for the supply of the foaming fluid, installed from the package of foam generating . 31330328.. grids at a distance determined by the diameter of the foaming generating grids from the mathematical ratio of grids, m; do / tilt angle fittings for tg cT compressed air supply to the axis where t is the distance along the axis of the foaming agent foamer along the direction of the separator from cutting the choke for the foam flow equal to 30 supplying the foaming liquid-40; bones up to foam generatingC - coefficient of proportionality, m; tness, equal to 0.45.