SU1584958A1 - Method of shielding reservoirs and gas lines from fire - Google Patents

Abstract

The invention relates to fire fighting equipment, in particular to methods of fire prevention for tanks and gas pipelines with combustible mixtures, which ensure the safe operation of equipment, and makes it possible to increase the reliability and efficiency of fire protection equipment. Water from the tank 16 is pumped through a pump 17 to a conical nozzle 6 located in the inlet chamber 3 of the flame arrester 1, in which there is an increase in the rate of outflow of water and a decrease in pressure in the jet. From the nozzle 6, water enters the nozzle 7, where a ring zone with a high vacuum is created around the jet, due to which a process of volume boiling of gases dissolved in water occurs. From the nozzle 7, the jet enters the vacuum chamber 8, in which the process of volume boiling of gases in the jet continues. Next, the flow enters successively installed vacuum ejection stages 9, 10 and 11, equipped with gas supplying nozzles 12, through which the ejection of gas in chamber 3 is ejected. Due to this, the process of continuous dispersion of water droplets in the ejected gas flow occurs. From step 11, the water-gas stream enters the water in chamber 3, captures the gas, and the gas stream is further fragmented into small bubbles, which then barmate through the liquid layer, forming a fine gas phase in the liquid volume. Then the gas bubbles float above the surface of the water and escape through the chamber 4 and the gas outlet pipe 13 to the consumer. 1 il.

Description

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The invention relates to countermeasures and, in particular, to fire protection systems for 2Q tanks of gas pipelines with hot mixtures, ensuring safe operation of the equipment.

The aim of the invention is to improve the reliability and efficiency of fire protection.

The drawing shows the scheme of the device for the implementation of the proposed method of fire protection.

The device consists of a fire heater, the body 1 of which is divided by a partition 2, forming a chamber 3 gas inlets and a gas outlet chamber 4. The inlet chamber 3 has a gas inlet 5 and an inclined conical e nozzle 6 with a nozzle 7 and a cylinder located at the outer side of the nozzle which is concentrically on the outside of the nozzle — a vacuum chamber 8 into the cylinder to obtain a high vacuum, 9-11, made in the form of cylinders with increasing diameters and lengths in series, with gas supplying nozzles 12 in the upper part for gas suction, which serve for gas ejection-45 and for obtaining a process of dispersing a stream of water. The exhaust chamber 4 has a nozzle 13 for removal of gas passing through the flame arrester through it. The fluid in the flame arrester passes through the overflow threshold 14 and the nozzle 15 and then the tank 16 is drained, from where it is pumped back to the fire barrier using the pump 17. At the bottom of the housing there is a downpipe 18 and a fitting 19. The tank 16 is provided with a valve 20 for venting gas therefrom. The water supply from the pump to the nozzle 6 is carried out through the pipeline 21.

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The method of fire protection is carried out as follows.

In the inlet pipeline 21, water is supplied to the conical nozzle 6 under a pressure of 0.4 MPa, where an increase in the rate of outflow of water and a decrease in pressure in the jet occurs. From the conical nozzle 6, water enters the nozzle 7, where an annular zone is created around the jet with a deep vacuum up to 0.01 MPa due to the energy of the jet itself and a process of boiling up gases dissolved in water occurs. From the nozzle 7, the jet enters the vacuum chamber 8, where, due to the jet energy, a vacuum ring zone is formed in which the process of volumetric boiling up of gases in the jet and destruction of the jet integrity continues. At the same time, the jet turns into a water-gas flow, which fills the entire cross-sectional area of the vacuum chamber 8 along the flow direction. The stream thus obtained enters the vacuum-ejection stage 9, into which gas is ejected from the gas inlet chamber 3 through the gas supplying nozzles 12, thereby causing the process of continuous dispersion of water droplets in the ejected gas stream. A similar process takes place in vacuum-ejection stages x 10 and 11. From stage 11, the gas-to-gas stream enters the liquid in chamber 3, trapping gas, and the gas stream is further fragmented into small bubbles, which then bubble through the liquid layer, forming fine gas phase in the liquid volume, and then gas bubbles float above the surface of the liquid and escape through the chamber 4 and the gas outlet pipe 13 to the consumer. Dust waste is deposited down the chamber and discharged through the drain pipe 18.

Claims (1)

Thus, the proposed ignition method allows for the fragmentation of the entire mass of the gas stream into small bubbles, in which subsequent bubbling through a layer of liquid in the flame arrester produces a homogeneous fine gas phase in the liquid, and therefore ensures the reliability of the fire enclosure. Invention Formula The method of fire protection for reservoirs and gas pipelines, which consists in supplying the gas flow into a container with liquid and subsequent crushing the gas at the exit from the liquid nozzle and barbarising it by supplying a jet of liquid obliquely to the surface of the liquid in the vessel that differs from in order to increase the reliability and efficiency of the fire preservation by forming a homogeneous fine gas phase in a liquid, before crushing the gas at the exit from the liquid nozzle it is subjected to preliminary grinding by ejecting a stream of evacuation of a liquid in the nozzle.