UA88184C2 - Method for warning and extinguishing of fire in the closed objects - Google Patents

Abstract

A method for warning and extinguishing of fire in the closed objects, at which the volume content of oxygen is determined and a fire-extinguisher substance is supplied till the achievement of volume maintenance of oxygen, at which the burning process is stopped, and a temperature in the closed object is determined. In addition, the process of supplying of inert gas is carried out through the bridges, which form a sluice, which pressurizes an object which is on the defensive. The bridges are formed by at least two or more double walls, filled with a incombustible substance, and with the presence of gas chamber between them. The value of pressure in a chamber is more than atmospheric, but below than in the protected object. The fluidized or gaseous nitrogen obtained during gasification of the fluidized nitrogen or from the high-pressure cylinders is used as a fire-extinguisher substance. This nitrogen is obtained with the intended purity from the nitric device, which is placed on a mobile transport vehicle or is stationary, at that the supplying of fire-extinguisher substance is carried out automatically till the defined temperature in the protected object.

Description

(patent VO Me2295040 from 2005.07.12; IPC" is less than atmospheric, but smaller than in the object

E215/00, A6C3/02). fire extinguishing, and as a gas fire extinguishing re-

The disadvantage of the invention is the low degree of hermetic (HVGR) nitrogen obtained by tization and the possibility of air suction, which during the gasification of liquid nitrogen, nitrogen in cylinders, is due to the presence of only two partitions. or nitrogen of a specified purity obtained from nitrogen

As the prototype of the invention, we accept the well-known station placed on a mobile transport vehicle, which refers to the methods of fire extinguishing means, or stationary, and the supply (HVGR) in closed specialized facilities, which consists in maintaining up to a given temperature in the facility, determination of the volume content of oxygen and the supply of inert gas, which is completely covered by the system of sensors of that gas, until the values of the volume content of the perature are reached. of oxygen, at which the support of the process is stopped. The method is implemented with the help of technological combustion. In addition, measurements are made of the general chain of the equipment, which consists of the pressure of the gas mixture and the content of hydrogen and nitrogen oxide in it, of the station that produces nitrogen with a carbon concentration that determines the beginning of the combustion process, 92-99.595 from air and is equipped with a liquefier at the same time control the temperature, the gradient of nitrogen and the storage tank, which connects the temperature and optical density of the gas mixture through a pipeline through the start system with an impulse to determine the beginning of the ignition process and regulate the flow of inert gas with a rate of increase controlled by the block software control of the total pressure of no more than 8kPa/s for reduction by valves. There is also a pipeline to prevent the volume content of oxygen below 1595 at partial pressure, a throttling device and a device for sluiced oxygen pressure of at least 12kPa and not exceeding the type for supplying nitrogen to the object that protects the value of absolute gas pressure is 0.4 MPa. Come on. The technological chain of the equipment itself is realized with the help of equipment containing high-pressure cylinders with nitrogen, which contain inert gas containers, the reserve of which is generated by the pressure control system. The entire chain of inert gas, distribution pipelines from the processing equipment is controlled by a block with a stop valve connected to a control device that is connected to a system of temperature sensors, oxygen gas analyzers, fire detectors, for example, thermocouples or pyrometers, warning devices, are also connected to the oxygen sensor. The alarm system notifies the control system, hydrogen and carbon gas analyzers about the start of a fire and about the start of fire-fighting carbon, pressure and temperature sensors, and regulators. In order to increase the sealing of the object, the gas release means are all connected to the protected jumper. by the control device supplied by the analysis unit Thus, the above-mentioned technical reliability of signals, by the power supply unit, by the result unit, which is achieved in the process of operation of the indication and signaling, by the computing unit, the invention, is provided by features that distinguish the switching unit. At the same time, the distribution outlets prevent it from signs of similar methods - the pipelines are equipped with devices for restricting and extinguishing fires, described according to the known level of inert gas supply, and at the outlets of the distribution equipment, in particular, in the invention adopted as a proto- pipelines, type dilution devices are installed. Thanks to the increased tightness of the inert gas entering the exit (application for dki), the suction of air is reduced, and the invention BO Mo2004134167; MPK7 Ab2С03/00, which reduces the fire extinguishing time,

Ab2C37/36). the amount of fire extinguishing substance decreases by

The disadvantage of the invention is that the technological overcoming of the fire increases the reliability of the chain of equipment for the implementation of the method of over-extinguishing the fire. The reliability of the method is increased by being overloaded with secondary elements, which, due to the simplification of the techno chain, generally reduce the reliability of fire extinguishing. For logical equipment due to the elimination of the same, this method is used only for closed secondary elements and assessment of fire danger and those objects that limit the application of the method. fire efficiency by only two parameters -

The task of the invention is to develop an effective temperature and oxygen concentration, one parameter of the method of preventing and extinguishing a fire, increasing the temperature. The reliability of the method is facilitated by increasing the hermeticity of the method, as well as the fact that the method provides for three sources of azotization of the extinguishing object, increasing control: nitrogen is obtained by gasification of the liquefied water of the fire-extinguishing process according to the appearance of nitrogen, from the nitrogen station and from high-pressure cylinders pressure of feedback between the extinguishing object and the unit. Figs. 1 and 2 schematically show the control technology, increasing the possibility of the fire-extinguishing chain method for the implementation of the proposed system, its cost-effectiveness. way A technological chain contains a station

The set task of warning and extinguishing nitrogen - 1, nitrogen liquefier - 2, storage fire in closed objects is solved by the fact that the tank - 3, the starting system together with the controlled determine the oxygen content and supply inert gas with a valve - 4, the software control unit valve - by adjusting the supply until the values are reached by changing the gasifier-converter - 5, the pipeline with a lot of oxygen content, at which the pressure is stopped - the prevention of pressure drop - 6, the device that throttles the combustion process and determines the temperature - 7 , pulse gasifier-converter of ru in a closed object, according to the invention, pressure process - 8, oxygen sensor - 9, temperature sensors of the inert gas supply are carried out through a hermetic (for example, thermocouples, pyrometers) - 10, block unit - a partition, which is formed by at least two channels - 11, a pressure control system of cylinders or a larger number of walls and the presence of high-pressure gas - 12, a warning system - 13, and cameras between them, and the pressure value in n high-pressure cylinders with nitrogen - 14, a jumper - 15, a sluice-type device for the introduction of gas, a pressure transducer 8, which also includes a fire extinguishing substance vaporizer (FEM) - 16, a distribution FEM. The rate of formation of gaseous nitrogen pipeline - 17. will depend on the amount of heat that

The technological chain of the equipment works, see the pulse gasifier, as follows. At the time of fire, the converter 8 with the HVGR evaporator, the vessel of which is temperature sensors, for example, thermocouples, or made in the form of a container for evaporation, scraperometers 10, sends a signal to the control unit of the captive HVGR under high pressure, partially filled 11, which through the warning system 13 notifies the non-profiled heat-accumulated heater about the start of a fire. After that, the appropriate service is given. The impulse gasifier-converter 8 puts jumpers 15 with the sluice device, labeled by the software control unit of the valve for introducing DHW 16 for sealing the zone by us 5 is connected to the control unit 11. Next, combustion and connects it through the distribution pipeline, bypassing the prevention pipeline injection of pressure into wire 17 to the chain of the equipment. They include the evaporator vessels 6 and the throttling device 7, the nitrogen nitrogen station 1 through the control unit 11, which enters the distribution pipeline 17, the device produces nitrogen with a concentration of 92-99,595 and which is of the pot-sluice type 16 and into the protected object. riben some time before the entry into force. At the same time, the Oxygen sensor unit 9 is connected to the control unit 11, control 11 sends a signal and turns off the valve, which, in turn, controls the supply of nitrogen to the dependent equipment, closes the air dampers (not affected by the concentration of oxygen in the room, which - shown). The inertia of this equipment will be protected. The supply of nitrogen to the temperature-protecting object depends on the speed of bridging of the jumpers for sya, they are carried out until the sensors of the formation of the sluice that seals the temperature-protecting object do not record the cessation of the fire. is spared It should not be forgotten that the unjustified storage of Nitrogen Station 1 after the fire has been extinguished, as well as the prolongation of the validity of the equipment, leads to unjustified replenishment of liquefied nitrogen in the accumulated large material losses. When the reservoir C due to evaporation, the sluice chamber, which forms bridges, creates nitrogen, which condenses in the nitrogen liquefier, the control unit 11 sends a signal to the system 2. The pressure control system of high-pressure cylinders ku 4, which gives a signal to the controlled the valve on the nitrogen 12 acts in such a way that when the pressure of the high-pressure cylinders 14, which are equipped with a nozzle, decreases, a signal is automatically sent to the pressure control unit 12 and to the opening of the slot 11, which is fixed and thanks to which , eliminate the storage tank with liquefied azo deficiency with the help of personnel servicing volume 3, which is a dewar vessel. Next, the equipment of the technological chain. captured nitrogen enters the pulse gasifier-

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Ministry of Education and Science of Ukraine

State Department of Intellectual Property, str. Urytskogo, 45, Kyiv, MSP, 03680, Ukraine

SE "Ukrainian Institute of Industrial Property", str. Glazunova, 1, Kyiv - 42, 01601