RU33021U1 - Integrated foam slurry curtain system - Google Patents

Description

An integrated system for creating a curtain of foamed suspension.

A useful model of the system relates to devices for producing foamed inert suspensions and can be used to localize and extinguish underground fires.

A turbulent foam generator is known for transporting ASH suspensions in a mine, containing nozzles — supplying a solution of a foaming agent and air, a mixing chamber and a pipe channel with a foaming device installed in it (description of certificate for PM on application No. 200: 2104804, 2002. Decision. September 5, 02)

The disadvantage of this device is the absence in the stabilizer system of the foam flow structure and an additional set of equipment for implementing an integrated system.

The purpose of the utility model is to increase the productivity and durability of the foam by intensifying the process of mixing and transporting the components of the mixture.

The indicated circuit is achieved by that. what is a useful model of an integrated system for creating a curtain of foamed suspension, containing a turbulent device for foaming suspensions, a fire-irrigation mine pipe, nozzles for supplying a solution of a foaming agent and compressed gas, a mixing chamber, a pipe channel with a foaming device installed in it and sources for supplying components for generating foam, the system is equipped with a stabilizer structure of the foamed suspension mounted on

the outlet flange of the foaming device in the adapter before entering the transport foam, at the end of which there is a perforated peak for its introduction into a hard-to-reach place, while to stabilize the structure of the foam pulp it is equipped with an additional nozzle for introducing the solution into the device

filler, for example fly ash, which is prepared and fed to the foaming device by means of a slurry submersible pump from a mine trolley at the place of work, and a foam mixer is built into the water pipe from the fire-irrigation pipe. with an adjustable foaming agent intake valve and simultaneously introducing a foam flow stabilizer into the pressure sleeve, made in the form of a solution of bentonite colloidal clay, which is also prepared in the second half of the trolley using a slurry submersible pump, and the mixing chamber of the mixture components in the suspension foaming device is made in the form of a diffuser in the course of foaming the suspension in the zone in front of the screw stabilizer.

The flow rate of the amount of the liquid phase dosed in the system (bentonite clay, foaming agent, water and liquid filler) is regulated by control valves in each pipeline and the operating time of the slurry submersible pump.

The proposed set of distinctive features due to the stabilization of the structure of the foam flow, additional input stabilizes additives in the composition of the components of the foam through an additional nozzle in the foam generator design that allows to increase the productivity, multiplicity and resistance of the foam when creating foam curtains in the path of fire gas movement.

In fig. The technological scheme of the application of an integrated system for creating a curtain from a foamed suspension is depicted.

The diagram shows the following main positions of the system: 1 fire and irrigation pipeline; 2-tap regulation; 3-sleeve water supply; 4- foaming agent supply hose (with freon; 5- capacity

; 6-mixer; 7-tap regulating the supply of foaming agent; 8 suspension of bentonite clay (flow stabilizer); E-mine trolley; 10-tap regulation stabilizer; 11-pump submersible slurry ШПН-2М; 12-sleeve supply of the stabilizer solution; 15-sleeve supply of gaseous nitrogen; 16-device turbulent for

lC (-1 0 43/2

foaming suspensions; 17 - confuser stabilizer flow structure; 18-foam line; 19-chamber mixing; 20-apparatus of the starting pump ШПН-2М; 21- perforated pipe (fire peak); 22 tip peaks; 23-filler suspension (ash and slag materials, hardening suspension, fly ash, inert dust, cement, clay powder, flotation waste, etc.); 24-partition capacity mine trolley.

The system operates as follows.

Technological scheme at the place of work, for example, to create a foam curtain on the path of a fire behind a coal-mining complex in the active face, is mounted according to the drawing, with the perforated pipe 21 located behind the complex.

The preparation of the suspension from bentonite clay provides in 4 tanks of the mine carriage 9 a slurry submersible pump 11 - ШПН2М, which serves for the preparation and supply of filler according to paragraph 23.

The amount of the foam-forming mixture from the container 5 and the bentonite slurry 8 from clay is regulated through flow taps 10 and 7 on the pipelines depending on the calculated water pressure from the discharge pipe 3 of the fire-irrigation pipe 1. which is provided via the flow valve 2 using a manometer (not shown).

The filler, for example, fly ash, is supplied through a non-return valve 13 with a pump 11 through a pipe 12 through an additional pipe to a turbulent device for foaming suspensions using compressed air or inert gas supplied through a supply hose 15.

The foam curtain created behind the complex provides protection

active face from the penetration of fire gases. The filing of a hardening slurry, for example, into a mining dome at a fire peak 21 provides for the displacement of fire gases and filling the dome space with a hardening composition.

Filling the suspension into the expanding chamber 19 for mixing the components of the mixture, made diffusely provides active mixing and feeding into the confuser adapter to stabilize the structure of the foam stream by swirling it at the initial section of the foam duct 18.

The amount of foaming agent in the sleeve 14 and the stabilizer of the suspension 8 is regulated on the foam mixer with control valves 7 and 10.

A useful system model provides an increase in the efficiency and reliability of localization and extinguishing of underground fires in hard-to-reach places. The use of stabilizing additives in the form of bentonite clay increases the resistance of the foam by more than 10 times, while reducing the consumption of labor and material resources.

Patent Specialist - - R.V. Dikova

Authors: -h. V.V. Myachin

°. Chuprikov

A. Sharov A.P. Fedorovich

Claims (3)

1. An integrated system for creating a curtain of foamed suspension, containing a turbulent device for foaming suspensions, a fire-irrigation pipe of a mine, nozzles for supplying a solution of a foaming agent and compressed gas, a mixing chamber, a pipe channel with a pricing device installed in it and sources for supplying components for generating foam, characterized in that it is equipped with a stabilizer of the structure of the foamed suspension mounted on the output flange of the foaming device in the adapter before going to the transpo mercury foam, at the end of which there is a perforated peak for its introduction into an inaccessible place, while to stabilize the structure of the foamed pulp, it is equipped with an additional nozzle for introducing a filler solution into the device, for example, fly ash, which is prepared and fed to the foaming device using slurry submersible a pump from a mine trolley at the place of work, and a foam mixer with an adjustable intake tap is built into the water pipe from the fire-irrigation pipe a foaming agent with the simultaneous introduction into the pressure hose of a stabilizer of the structure of the foam stream, made in the form of a solution of bentonite colloidal clay, which is also prepared in the second half of the trolley using a slurry submersible pump. 2. The integrated system for creating a curtain of foamed suspension according to claim 1, characterized in that the mixing chamber of the components of the mixture in the foaming device of the suspension is made in the form of a diffuser during foaming of the suspension in the zone in front of the screw stabilizer. 3. The complex system for creating a curtain of foamed suspension according to claim 1 or 2, characterized in that the flow rate of the amount of the liquid phase dosed in the system (bentonite clay, foaming agent, water and liquid filler) is regulated by the control valves in each pipeline and the operating time of the slurry submersible pump.