SU1208264A1 - Arrangement for heat and moisture treatment of inflammable gases - Google Patents

Description

one

The invention relates to fire fighting equipment and can be used to extinguish underground fires or fires in enclosed spaces.

The aim of the invention is to increase the efficiency of extinguishing fires in fire extinguishing systems with recycling of fire gas.

FIG. 1 shows a schematic diagram of a fire extinguishing device, a longitudinal section; in fig. 2 shows section A-A in FIG. 1 (the plane of the section in Fig. 1 passes along the axis of the duct and then moves to the axis of the nozzle for exhaust of fire gases).

The device comprises a housing 1 provided with a pipe 2 supplying fire gases under the liquid level and nozzles 3 discharging the treated gases into the combustion zone and divided by two vertical guide partitions 4 and 5 with the formation of chambers 6 and 7 of stepwise contact treatment of fire gases, the chambers having pallets 8 and 9 with sludge collectors 10 and 11 and a separator 12 of perforated paired plates providing, besides sticking drops to the surface, also the failure of liquid drops into the space between them. In order to improve the conditions for the formation of gas-liquid emulsion (foam) in the working space of chamber 6 and to enable the device to work on dissimilar liquids, the fire gas supply pipe 2 is located equidistant from the chamber walls, the first partition is installed with a gap 13 from the upper wall of the body, and the second partition 5 has a gap 14 from the pallet 9, the upper mark of which lies at the level of the liquid. Due to such an installation, the partitions 4 and 5 form between themselves a channel-branch pipe for supplying 15 treated fire gases from the chamber 6 to the chamber 7 - the second stage of their treatment m and exclude the communication of the cells below the liquid level. The device also contains a collector 16 with nozzles for supplying water to the chamber 7, the make-up device 17 is a liquid level regulator in the sump 8, connected to the pyrogallol base tank 18 with a shut-off valve 19

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and a water supply manifold with a pipeline with a shut-off valve 20, the overflow device 21 - a liquid level regulator in the sump 9, through

5 which discharges its surplus, rotor cap-grooves 22, which are installed one by one at the head of each of the nozzles 3 and release the treated gases into the mountain zone and constitute an impeller made of several perforated lobes mounted on an axis with bearing bushings. The impeller blades are inclined to the plane of rotation 5 or at an angle of 40-45 °. In addition, directly to the edge of the outlet of the nozzle 3, gas duct 23 is connected, in which a small amount of

20 by internal pressure, gaseous phlegmatizing composition of galloidated hydrocarbons is supplied from tanks 24 in proportion to the decreasing oxygen concentration in circulating fire gases. The containers 24 are located on the platform in the lower part of the device, which is given the opportunity to move across the floor of the room for some distance from the month of its constant placement using swivel wheels and some free length of electrical cables with aluminum sheath of ABG type and flexible hoses in the pro35 a CGS-type hair sheath, with the help of which a liquid is introduced into the chambers and its small surplus is discharged into the container through a level regulator 21. On the top wall

40 of case 1, a fan 25 is placed with a duct 26 connected to its suction inlet, having in its head, a part a rectangular section 27 with longitudinal guides in which cassettes 28 and 29 are successively installed, filled with fused silica gel - water vapor adsorbent - and hopcalitic catalyst. At the inlet of the fan snab, jQ wives with a replaceable mesh filter 30. The cassettes are framed with frames. The minimum thickness of the inner space of the cassettes is determined by the strength of the plates of the pressed catalyst and

,., fused sorbent, and the implementation of the side surfaces of the cassettes in the form of separate ribs is provided only as a measure against dumping.

tel. The minimum distance between cassettes of the same name in the row is about 15 mm.

A device for carrying out the proposed method of extinguishing a fire works as follows.

The fire gases from the combustion zone are sucked off by the fan 25 through the mesh filter 30 and, further moving along the rectangular section 27 of the duct, in contact with the surfaces of silica gel and hoppalitic fillers arranged in cassettes 28 and 29, where the fire gases are dried (for the best catalyst), and carbon monoxide is oxidized to carbon dioxide, after which the fire gases, moving through duct 26 and inlet pipe 2, are supplied at a speed V 15-18 m / s under the level of pyrogallol alkali solution previously poured into the pan 8 oxygen scavenger), where the gases are bubbled into the liquid and displaces part of it into the working space of chamber 6 of the first processing stage, forming an unstable moving layer of gas-liquid foam with films and splashes in the upper part. To prevent the removal of individual droplets of pyrogallol alkaline solution from chamber 6, the speed of movement of the gases to be treated in it does not exceed 5 m / s. Next, the gas stream, partially cooled, cleaned from solid particles of smoke, dust, some toxic combustion products, soluble or precipitated in a liquid, moistened and reduced the oxygen content as a result of the reaction upon contact with the strongly developed surface of pyrogallol alkaline solution, the gap 13 and the nozzle 15 for supplying gases to the surface of a pure liquid (water) in 1 udonda 9, where it partially barbers in it and by force of pressure and impact displaces part of it into the working space of chamber 7, turning upwards through gap 14 forms a moving bed of a gas-liquid emulsion films brazgami dropwise and the top. In kame10

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The fire gases are substantially cooled, refined, saturated with suspended droplet moisture, and transported at a speed of m / s 5 to the nozzle 3 of the gases in the combustion zone, where the rotor chassis 22 is rotated at the head of the exhaust nozzle by their kinetic energy. 3, using perforated blades of which finely dispersed droplet moisture carried by the gas stream is produced. Then, the flow of treated fire gases at a velocity of m / s and above is released into the combustion zone. After the personnel are evacuated from the room to the treated gases emitted into the combustion zone, the gaseous refluxing gas supplied through the gas duct 23 from the tank 24, which is under a slight internal pressure, which gradually decreases, begins to mix. The latter circumstance provides a gradual decrease in the amount of supplied phlegmatizing composition, which is almost proportional to a decrease in the concentration of oxygen in circulating fire gases. Fluid into chamber 7 is supplied through collector nozzles 16 from a water supply network or under low pressure from a spare tank (not shown), and its flow rate is determined by preliminary calibration depending on pressure, amount of evaporated moisture and amount of droplet moisture suspended in the gas stream gf rheni. The liquid for feeding the evaporating part of it in chamber 6 comes from the common inlet manifold 16 through the shut-off and control valve 20 and the make-up device 17, which has the ability to move in the vertical direction. Periodic feeding of chamber 6 with an alkaline solution of pyrogallol is produced from tank 18 through a pipeline with a shut-off and control valve 19.

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VNIIPI Order 216/43 Circulation 436 Subscription Branch PIP Patent, Uzhgorod, Proektna St., 4

Claims (1)

DEVICE FOR HEAT AND HUMIDITY PROCESSING OF FIRE GASES, including a housing with a pan and a sludge collector, a fire gas supply pipe located below the liquid level in the pan, fire gas discharge pipes, a manifold with nozzles, an overflow device, a liquid level regulator, a separator and two vertical partitions installed inside housing with the formation of chambers, characterized in that, in order to increase the efficiency of extinguishing fires in fire extinguishing systems with recirculation of fire gases, it is equipped with a fan m with a suction duct and cartridges with a water vapor adsorbent and a hopcalite oxidation catalyst, ¹ located in the inlet of the suction duct, two rotor droplets with perforated blades, each of which is located in the head of the exhaust pipes of fire gases, with a container with a phlegmatizing agent connected by additional nozzle with ejection nozzles fire gases, and the suction duct is connected with _a pipe for supplying fire gases, SS outlet to torogo has a cross section similar to the cross section of the chamber and disposed equidistant from the chamber walls and the first gas along the vertical dividing wall installed with a gap between it and the upper wall of the chamber, wherein the separator is placed. SU., .. 1208264