RU16610U1 - GENERATOR FOR PRODUCING NITROGEN FOAM PULPOULA - Google Patents

Abstract

A generator for producing nitrogen foam pulp, including a housing, an ejector with a calibrated outlet, a vacuum and mixing chamber, a gas supply pipe, a foam supply pipe, and pipelines, characterized in that a dispersing device is installed behind the supply pipe to the foaming device of the foaming agent in the form of turbulence of the blades (first mixing chamber), and after introducing liquid or gaseous nitrogen into the foaming mixture, a heat exchanger is made in the form of a replaceable confuser sleeve, n For example, with deviating slotted or perforated channels or holes, the foam pulp generation performance is controlled by two thermometers installed on the inlet adapter of the generator housing at the water (pulp) inlet to the generator and at the exit of the foamed product directly into the second chamber for mixing reagents with liquid or gaseous nitrogen.

Description

GESHERATOR LH PRODUCTION NITROGEN FOAM

The utility model relates to the field of mining and can be used to give warning, localization and suppression of underground endogenous fires that have occurred in coal mines.

A device is known for foaming clay pulp, including a transport pipe, an ejector with a calibrated outlet, nozzles and piping for reagents for foaming clay pulp, the device is equipped with a sleeve with a calibrated hole and a dispersant of clay pulp made in the form of a perforated cone against the movement of the pulp stream. (Autosvid.SSSR No. 951898, class E 21 P 5/00,

1980).

The disadvantage of this device is the insufficient degree of mixing of the reagents (pulp, air blower and foaming agent) on the clay pulp dasper agent in the foaming composition

in short pipe sections.

A device is known. For foaming clay pulp, including a housing, an ejector with a calibrated outlet, a vacuum and mixing chamber, a nozzle. For 11 air supply, a nozzle for supplying a foaming agent and pipelines, while the device is equipped with a conical sleeve with a calibrated outlet at the top mounted concentrically inside the casing with the apex of the cone in the direction of movement of the foamed pulp. (Autosvid.SSSR No. II3I296, class E 21 P 5/00, 1983).

The disadvantage of this device is the insufficient degree of mixing of the reagents in the mixing chamber 13 of the diffuser 12, which does not provide sufficient dispersion of the foam

unbound bubble foam. By production tests it was established that at a well length of 15 m and a pulp pressure of OD.,. 0.2 MPa from 2.0 to 5.0. air (inert gas)

Don't bind to foam. It was noted that air breakthroughs occur along the walls of the casing.

The purpose of the utility model is to increase the multiplicity of foamed clay pulp due to the intensifying process of mixing reagents for foaming pulp.

This goal is achieved by the fact that in the generator, which includes the tube body, while a dispersing device is installed behind the supply pipe to the blowing device of the blowing agent in the form of blades focused on swirling (the first mixing chamber), and after the introduction of liquid or gaseous nitrogen (its low-temperature) into the foam-forming mixture aerosols) a heat exchanger is made in the form of a replaceable confuser sleeve in the form of a DEFLECTING 1CUS perforated or slotted channels, (second mixing chamber), while monitoring the performance of Neringa was performed by thinking with thermometers installed on the generator’s body at the water (pulp) inlet to the generator and at the outlet of the second chamber for mixing the reagents with liquid or gaseous nitrogen.

The pre set of distinctive features (the presence of two chambers for mixing foaming reagents and ensuring control over the productivity of the injection of pulp into the casing of the well) provides a stable foam multiplicity ... 50 (as shown by tests) on short pipelines with a sufficient degree of performance regulation, without ensuring freezing of the pipeline when supplying liquid nitrogen with T -196 ° C. The drawing shows a generator of nitrogen foam, a longitudinal section.

The generator consists of a connecting adapter I with a connecting head of type Ш-70. For connecting a fire hose for water supply or pulp, equipped with a manometer 2 and a pipe casing 3 with a built-in manometer, a hose 4 for feeding (ejecting) a foaming agent with a foam mixer 5 of type ПС1А, a housing 6 for introducing or gaseous nitrogen with a fitting 7 for connecting a metal hose from a tank of liquid nitrogen or a gasifier (not shown), mixing blades 8. for mixing the starting reagent with a foaming agent in the mixing chamber 9, heat exchange Single water confuser replaceable sleeve 10 with slotted mixing channels II, the second mixing chamber housing 12 with bias 13 with window 14 and integrated pressure gauge 15 measuring .For inert foam temperature (penopulpy) to exclude peremerzaniya generator; elbow 16 for connecting the generator to the well casing (not shown).

The generator works as follows.

Its installation is carried out on the casing of a preventive well drilled from the surface into the worked-out part of the formation to suppress the source of an underground endogenous fire or in a mine mine for appropriate supply as intended in the form of a preventive mixture. To obtain inert foam, a fire hose from the water supply pipe is connected to the connecting head of adapter I, and a metal hose is connected to the nozzle 7 to the Shchetsk nitrogen tank or to the KAE-1, KOMBI or ZISH11ETS-1 nitrogen energy complex (all complexes of the RosNIIGD design), and sleeve 4 is placed in container with a foaming agent.

When generating foam in the mixing chamber 9, there is an active mixing of water and the foaming agent through the diffuser of the foam mixer 5 and the deflecting mixing blades 8. The atomizer of liquid nitrogen enters the heat exchanger-sleeve 10, where

13 mixing, while slotted mixing channels II provide active foaming. When supplying Szczecin nitrogen, the temperature of the foam generation should be monitored by thermometer 15. With an increase in productivity, hot water is supplied to adapter I, which is controlled by the built-in thermometer 3. If there is no hot water, it is necessary to reduce the flow of liquid nitrogen or use gaseous nitrogen with a slight minus temperature

The proposed utility model makes it possible to increase the efficiency of prophylactic works with the goal of minimizing, localizing, or extinguishing underground endogenous fires.

Advantage over analogues: the utility model allows to intensify the process of mixing reagents for foaming, suspensions, to increase the efficiency of volumetric processing of the worked-out space by increasing the multiplicity of the foam in the re-mixing chamber of the reagents.

 M.A. Chernova. V.G. Igishev

S. V.M. Kondakov

/

.B. Popov

A.E. Chuprikov

(7

Claims (1)

A generator for producing nitrogen foam pulp, including a housing, an ejector with a calibrated outlet, a vacuum and mixing chamber, a gas supply pipe, a foam supply pipe, and pipelines, characterized in that a dispersing device is installed behind the supply pipe to the foaming device of the foaming agent in the form of turbulence of the blades (first mixing chamber), and after introducing liquid or gaseous nitrogen into the foaming mixture, a heat exchanger is made in the form of a replaceable confuser sleeve, n For example, with deviating slotted or perforated channels or holes, the foam pulp generation performance is controlled by two thermometers installed on the inlet adapter of the generator housing at the water (pulp) inlet to the generator and at the exit of the foamed product directly into the second chamber for mixing reagents with liquid or gaseous nitrogen.