SU1755817A1 - Method of fire arresting - Google Patents

Abstract

The invention relates to gas, metallurgical and other industrial sectors, where the formation of explosive mixtures requires the safe operation of equipment, in particular, with regard to the method of fire protection for tanks and gas pipelines with combustible mixtures. The purpose of the invention is to improve the reliability and efficiency of fire protection. The essence of the invention: a fire protection method consists in crushing a gas stream by ejecting it with a pulsating liquid stream, followed by crushing and bubbling the mass of gas flow through a layer of liquid in a fire arrester. 2 Il.

Description

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This invention relates to the gas, metallurgical and other industries. where, in the formation of explosive mixtures, it is necessary to ensure the safe operation of the equipment and, in particular, concerns the method of fire prevention for tanks and gas pipelines with combustible mixtures.

A known method for this is known (AS No. 303906, 1969 g), which consists in splitting the gas stream into pieces, which are then bubbled through a layer of liquid. The liquid layer should be at least 200 mm and the gas pressure should be more than 200 mm water column, while, for example, when reducing metal powders with hydrogen, the process should be carried out at a pressure of 40-80 mm of water. in electric rotary kilns. An increase in pressure in these furnaces above 200 mm leads to an increase in the consumption of hydrogen.

The known method of fire pretreatment for tanks and gas pipelines with combustible mixtures (A C No. 582794, published in IB No. 45, 1977 is a prototype), according to which in gas pipelines with a pressure of 200 mm of water | / column mi fluid that serves obliquely to the surface of the liquid in the direction of the gas outlet.

The described prototype method does not allow crushing the entire mass of the gas flow into small bubbles, in which subsequent bubbling through a layer of liquid in a flame arrester would create a homogeneous fine gas phase in the liquid and, therefore, does not provide the necessary reliability of fire protection.

In the design that implements the prototype method, the active jet of liquid flowing from the nozzle captures the gas only with its surface,

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part of the jet with the gas is not in contact, which leads to low efficiency of this method.

The purpose of the invention is to increase the reliability and efficiency of fire protection.

FIG. Figure 1 shows a diagram of a device for implementing the proposed fireproofing method, S in FIG. 2, an ejector used to implement the method.

The device includes a flame arrestor housing 1, which is divided by a partition 2 forming a gas inlet chamber 3 and a gas outlet chamber 4. The inlet chamber has a gas inlet 5 and an inclined conical nozzle 6 mounted on the ejector body 7, equipped with gas supply channels 8, a mixing chamber 9 and a diffuser 10 mounted in the body 7 with axial displacement and spring-loaded relative to the corpus 7, there is also a vortex toroidal chamber consisting of two parts 1T and 12, one of which is made in Mixing chamber 9, and the other in diffuser 10. The ejector also has a spring 13 and their magnetic rings 14.

The exhaust chamber 4 has a nozzle 15 for removal of gas passing through the flame arrester through it. The liquid in the fire barrier passes through the overflow threshold 16 and the choke 17 and then is discharged into the tank 18, from where it is pumped back to the fire barrier by means of a pump 19. 8 the bottom of the housing has a drain pipe 20 and the fitting 21.

The method of fire prevention is carried out as follows. By the inlet pipe 23, water is supplied to the conical nozzle b and, entering the mixing chamber 9, causes gas to be ejected in the channels 8. There is a mixture of water and gas. The pre-mixed medium enters the Ґ vortex toroidal chamber 11, 12 and excites the oscillations of the free part 12 of the diffuser 10, as well as the deformation energy of the spring 13 and the vortex flows of the magnetic rings 14, creating a pulsating flow, which improves the quality of the water and gas mixing: small bubbles,

which are then bubbled through a layer of liquid (water) to form a fine gas phase in the volume of liquid, and then gas bubbles float above the surface of the liquid and escape through chamber 4 and

gas outlet 15.

Dust waste is deposited down the chamber and discharged through the drain pipe 20. Thus, the proposed fire method by which the gas stream is crushed into pieces, which are then sparged through a layer of liquid, and the crushing and bubbling of the gas stream are jets of liquids that are fed obliquely to the surface

liquids in the direction of the gas outlet, while crushing the gas flow is carried out by mixing the gas with the liquid, creating a pulsating flow, provides the necessary reliability of the fire barrier, as in the fire arrester a homogeneous fine gas phase is created in the liquid. Compared with the prototype, a thin dispersion of gas in a liquid, respectively, increases the reliability and efficiency of fire protection equipment.

Claims (1)

The invention of the method of fire equipment for tanks and gas pipelines with combustible mixtures, including gas supply, gas outlet, splitting the gas flow into parts and the subsequent bubbling of the gas flow with jets of liquid, which are fed obliquely to the surface of the liquid layer towards the gas outlet, characterized in that. that, in order to increase reliability and efficiency, the fragmentation of the gas flow is ejected by a pulsating stream of liquid -S-L- Vr Jx "