RU2695741C1 - Device for fire extinguishing by steam - Google Patents

Abstract

FIELD: fire-fighting systems.SUBSTANCE: device for fire extinguishing with steam is intended for quick elimination of ignition sources inside the process vessel, operating at atmospheric pressure and at working medium temperature higher than 100 °C. Current fire extinguishing systems make it possible to quickly eliminate ignitions within process units and apparatuses, but have the following drawbacks: fire-extinguishing substances and compositions (foam, inert gas, powder) require special equipment for preparation, storage, maintenance and initialization for direct application; fire-fighting modules based on said substances are structurally sophisticated and often are disposable; when extinguishing inflammations with said substances, as a rule, the entire contents of the process apparatus deteriorates. Existing steam extinguishing installations receive steam from steam boilers constantly in hot standby. This is technically difficult and unprofitable. Proposed invention provides fast elimination of ignitions within closed volume of process equipment by steam, formed from overheated water contained inside tightly closed vessel of said device, with sudden reduction of pressure inside it to atmospheric pressure. To operate and maintain the proposed device, a steam boiler or a separate steam main is not required. Maintenance of high temperature and pressure of water inside the device is carried out due to heat of the working medium. Device is reusable, and fire extinguishing substance is cheap and harmless.EFFECT: device for fire extinguishing by steam is proposed.1 cl, 5 dwg

Description

Technical field

The invention relates to methods for fighting fires and to processes for eliminating fires in confined spaces.

State of the art

As a prototype adopted "Device for extinguishing fires" according to the Patent of the Russian Federation RU 2245182 C1. From the proposed invention, the device described in the RF Patent RU 2245182 C1 has the following differences:

- heating of the extinguishing agent (water) in an airtight container occurs due to the thermal energy released during the combustion of protected materials and equipment;

- the output of the steam-water mixture into the room is through openings of an indefinite shape, of indefinite size and an unknown location and direction.

The invention according to the Patent of the Russian Federation RU 2245182 C1 has the following disadvantages:

- for heating water in a hermetically sealed barrel until the required temperature and pressure is reached, which can break the barrel of the barrel, a long, indefinite time is required, during which a significant part of the materials and equipment protected from fire can die. This will lead to losses associated with the loss of material assets and possible damage to the building structures of the building itself;

- the uncertainty of the shape, size, location and direction of the outlet openings formed when the barrel barrel ruptures, reduces the efficiency of the device for its intended purpose, makes it impossible to determine by calculation the necessary number of devices and water to provide fire fighting in a given volume;

- it is impossible to determine to what specific temperature the water in the barrel will be overheated. The pressure in the barrel and the amount of water vapor generated to extinguish the fire depend on the temperature of the superheat of the water;

- the moment of the beginning of the supply of the extinguishing agent is not tied in time to the moment of ignition and is uncontrollable;

- the device is used only once, and for the next working cycle it is necessary to equip the protected premises with a new set of “Fire Extinguishing Devices”.

Known "Extinguishing element" according to the Patent of the Russian Federation RU 2406552 C1. From the proposed invention "Fire extinguishing element" has the following differences:

- extinguishing agent (water) is in small glass capsules (transverse size of the capsule is about 4 mm);

- heating of water in capsules occurs due to the thermal energy released during the burning of protected materials and equipment;

- the dispersed water and steam exit into the protected room as a result of the destruction of the glass capsules when they are heated above the boiling point of water and the pressure of the steam-water mixture in the capsule is increased.

The invention according to the Patent of the Russian Federation RU 2406552 C1 has the following disadvantages:

- to heat the capsule to a temperature at which it is destroyed by the pressure of the steam-water mixture inside the capsule, it takes time. This leads to a time delay between the moment of occurrence of the fire and the beginning of its extinction;

- the exit of the steam-water mixture from the capsules into the protected room does not occur simultaneously, because capsules are located in different places of the room and they are heated unevenly and unequally. Consequently, the amount of water and steam entering the room cannot be controlled. This reduces the efficiency of extinguishing fires;

- the destruction of the capsules occurs with the formation of a large number of small particles of glass that fall into the material to be protected, into equipment, into the coatings of building structures and walls of the room. After extinguishing, part of the surviving material material becomes unusable, and the room itself and equipment require careful cleaning of glass dust and fragments.

Known "Fire extinguishing element" according to the Patent of the Russian Federation RU 2401674 C1. From the proposed invention "Fire extinguishing element" has the following differences:

- extinguishing agent (water) is in small thin-walled glass capsules (transverse size of the capsule is about 4 mm);

- heating of water in capsules occurs due to the thermal energy released during the burning of protected materials and equipment;

- the dispersed water and steam exit into the protected room due to the destruction of the glass capsules when they are heated above the boiling point of water and the pressure of the steam-water mixture in the capsule increases.

The invention according to the Patent of the Russian Federation RU 2401674 C1 has the following disadvantages:

- to heat glass capsules to a temperature at which they are destroyed by the pressure of the steam-water mixture inside the capsule, it takes time. This leads to a time delay between the moment of occurrence of the fire and the beginning of its extinction;

- the exit of the steam-water mixture from the capsules into the protected room does not occur simultaneously, because capsules are located in different places of the room and they are heated unevenly and unequally. Consequently, the amount of water and steam entering the room cannot be controlled. This reduces the efficiency of extinguishing fires;

- the destruction of the capsules occurs with the formation of a large number of small particles of glass that fall into the material to be protected, into equipment, into the coatings of building structures and walls of the room. After extinguishing, part of the surviving material becomes unusable, and the room itself and equipment require careful cleaning of glass dust and fragments.

The well-known "Method of extinguishing a fire" according to the Patent of the Russian Federation RU 2295370 C2. From the proposed invention, the "Fire Extinguishing Method" has the following differences:

- extinguishing agent (water) is in small thin-walled glass capsules (transverse size of the capsule is about 4 mm);

- heating of water in capsules occurs due to the thermal energy released during the burning of protected materials and equipment;

- the delivery of capsules with a fire extinguishing agent to the combustion zone is carried out using a jet of water, an explosive, an air gun, a bomb;

- the dispersed water and steam exit into the protected room as a result of the destruction of the glass capsules when they are heated above the boiling point of water and the pressure of the steam-water mixture in the capsule is increased.

The invention according to the RF Patent RU 2295370 C2 has the following disadvantages:

- special equipment is required to deliver capsules to the combustion zone;

- to heat glass capsules to a temperature at which they are destroyed by the pressure of the steam-water mixture inside the capsule, it takes time. This leads to a time delay between the moment of occurrence of the fire and the beginning of its extinction;

- the exit of the steam-water mixture from the capsules into the protected room does not occur simultaneously, because the capsules do not reach different places in the room at the same time and are not evenly distributed, therefore, the amount of water and steam entering the room cannot be controlled. This reduces the efficiency of extinguishing fires;

- the destruction of the capsules occurs with the formation of a large number of small particles of glass that fall into the material to be protected, into equipment, into the coatings of building structures and walls of the room. After extinguishing, part of the surviving material becomes unusable, and the room itself and equipment require careful cleaning of glass dust and fragments.

The well-known "Method and device for extinguishing fires" according to the patent of the Russian Federation RU 2318562 C2. From the proposed invention "Method and device for extinguishing fires" has the following differences:

- fire extinguishing substance is located in thin-walled closed containers located in the burning area;

- tanks are interconnected by jumpers;

- the heating of the extinguishing agent in the tanks is due to the thermal energy released during the combustion of the protected materials and equipment;

- the output of the steam-water mixture into the room is through openings of an indefinite shape, of indefinite size and an unknown location and direction.

The invention according to the Patent of the Russian Federation RU 2318562 C2 has the following disadvantages:

- for heating the extinguishing agent in the tanks until the required temperature and pressure is reached, which can break the shell of the tank, it will take a long, indefinite time, during which a significant part of the materials and equipment protected from fire can die. This will lead to losses associated with the loss of material assets and possible damage to the building structures of the building itself;

- the uncertainty of the shape, size, location and direction of the outlet openings formed when the container shell ruptures, reduces the efficiency of the device for its intended purpose, makes it impossible to determine by calculation the required number of containers and extinguishing agent to provide fire extinguishing in a given volume;

- it is impossible to determine to what specific temperature the water in the tanks will be overheated. The pressure in the tanks and the amount of the vapor-liquid mixture formed to extinguish the fire depend on the temperature of the superheat of the water;

- since the containers are connected to each other by jumpers, when only one of the containers ruptures, the pressure in the entire system drops. The remaining containers do not break, the entry of the extinguishing agent into the room slows down and occurs only at one point in the space of the room. This reduces the efficiency of extinguishing fires;

- the moment of the beginning of the supply of the extinguishing agent is not tied in time to the moment of ignition and is uncontrollable;

- the device is disposable and for the next working cycle it is necessary to equip the premises with a new set of fire extinguishing devices.

The well-known "Method of eliminating combustion in gallery rooms" according to the RF Patent RU 2288013 C2. From the proposed invention "Method for the elimination of combustion in gallery rooms" has the following differences:

- isolation of the gallery from the spread of the flame through it, as well as from the access of air from outside to maintain combustion at the first stage, is achieved by creating a hydraulic (water) curtain;

- the supply of the extinguishing agent directly to extinguish the flame is carried out in the second stage using spray nozzles.

The invention according to the Patent of the Russian Federation RU 2288013 C2 has the following disadvantages:

- the supply of the extinguishing agent to the zone of the hydraulic curtain and to the extinguishing zone of the flame is carried out from outside the gallery. Such a supply system has a certain inertia, the supply of a fire extinguishing agent is carried out with a time delay between the moment of ignition and the beginning of its extinguishing;

- to ensure the continuous operation of the "Method of eliminating combustion in gallery rooms", special equipment is needed: pumps, receivers, valves, complex automation systems, capacitive equipment, etc.

The well-known "Method of extinguishing a fire and a device for its implementation" according to the RF Patent RU 2319529 C2. From the proposed invention, “Method of extinguishing a fire and a device for its implementation” has the following differences:

- the extinguishing agent is located in an elastic mesh shell suspended above the protected area;

- heating of the extinguishing agent in the shell occurs due to the thermal energy released during the combustion of the protected materials and equipment;

- a fire extinguishing agent is thrown into the combustion zone due to the destruction of the shell by an explosive charge placed in the shell when it is equipped.

The invention according to the RF Patent RU 3319529 C2 has the following disadvantages:

- when the charge is detonated, not all cells of the retina are destroyed, which leads to incomplete coverage of the combustion zone with a fire extinguishing agent;

- the device is disposable and for the next working cycle it is necessary to equip the premises with a new set of fire extinguishing devices.

It is known "Device for extinguishing a fire with superheated water" according to the RF Patent RU 2030194 C1. From the proposed invention "Device for extinguishing fires with superheated water" has the following differences:

- superheated water is supplied to the combustion zone from the outside;

- superheated water is prepared using a special unit consisting of a burner, fan, internal combustion engine and heat exchanger.

The invention according to the RF Patent RU 2030194 C1 has the following disadvantages:

- for the preparation of superheated water, it is necessary to have a complex unit consisting of a burner, fan, internal combustion engine and heat exchanger, as well as a fuel supply for the internal combustion engine;

- the inability to obtain a large, quickly covering the entire combustion zone volume of the steam-water mixture in a short period of time.

Disclosure of invention

The device for extinguishing fires by steam is designed to extinguish fires inside process devices operating at atmospheric pressure and a temperature of the working medium above 100 ° C.

The device contains:

- a vessel that is located inside the technological apparatus;

- brackets for mounting the vessel inside the technological apparatus;

- fire detection sensors;

- controller;

- actuators for opening valves.

The vessel, which is located inside the technological apparatus, consists of a steel shell, valve (s), nozzle (s), as well as pipelines for filling the vessel with water, draining water and monitoring the filling of the vessel, equipped with locking devices.

The essence of the proposed invention is that to extinguish a fire inside a process apparatus operating at atmospheric pressure and a temperature above 100 ° C, water vapor is used which is generated from superheated water. Superheated water is obtained in a hermetically sealed vessel located inside the technological apparatus. For the formation of superheated water in a hermetically sealed vessel, an external supply of thermal energy is not required. The vessel is part of the working space of the technological apparatus, the water in it overheats due to the thermal energy of the working environment of the technological apparatus. Since the technological apparatus is protected from heat loss by a layer of heat-insulating material, additional thermal energy is not required to maintain the temperature of the water in the vessel, except for thermal energy to compensate for the thermal losses of the technological apparatus through the thermal insulation layer. Water is heated to the temperature of the working medium of the technological apparatus at the same time as it is heated and the operating mode is reached. Throughout the entire technological cycle, the device for extinguishing steam ignitions is in constant readiness for its intended use.

The figures of the drawings, a description of the drawings, and a description of the operation of the device are made by the example of its use as part of a heat-treating chamber for the production of linoleum in a promiscuous manner. In the linoleum production technology, the following basic technological operations are carried out in an advancing way:

- application of a layer of polymer material on a non-woven fabric;

- calibration of a layer of material on a non-woven basis using heated rollers;

- exposure of the semi-finished linoleum in the heat-sealing chamber for a certain time at a temperature of from 160 ° C to 190 ° C.

The production process of linoleum and the process of holding it in a heat recovery chamber is continuous. The exposure time depends on the feed rate of the semi-finished linoleum in the chamber and on the length of the chamber.

In existing steam extinguishing systems, steam is supplied to the ignition zone from external sources: enterprise steam lines, steam generators, steam boilers with water treatment systems that are constantly in the “hot” reserve. This requires large material costs, special equipment, trained staff.

The technical result of the proposed invention is the ability to extinguish fires in closed volumes of technological apparatus with steam generated when a fixed volume of superheated water boils in a vessel when its pressure is released to atmospheric pressure. To obtain superheated water and steam, steam boilers, steam generators, and special steam lines are not required. Superheated water is obtained directly in the technological apparatus (room) in a hermetically sealed vessel due to the heat of the working medium when the technological apparatus enters the operating mode. The temperature and pressure of water in a hermetically sealed vessel are provided throughout the entire process without additional costs of thermal energy, and the entire device for extinguishing fires by steam is in constant readiness for intended use and works simultaneously with the moment of ignition, which ensures high extinguishing efficiency.

The device according to the invention is reusable. For the next intended use, after eliminating the fire, you only need to close the valves and fill the vessel with water.

Brief Description of the Drawings

FIG. 1. Cross section of a technological apparatus with a schematic diagram of a device.

FIG. 2. The scheme of the vessel and its piping.

FIG. 3. Cross section of the vessel before ignition.

FIG. 4. Cross section of the vessel after actuation of the actuator at the time of ignition.

FIG. 5. Diagram of the dependence of the amount of steam generated on the pressure of superheated water (condensate).

A cross section of a technological apparatus 1 with a schematic diagram of a device is shown in FIG. one.

1. Technological apparatus.

2. Technological gap.

3. Protected material.

4. The vessel.

5. Bracket.

6. Fire detection sensor.

7. The controller.

8. Executive mechanism.

The diagram of the vessel 4 and its piping is shown in Fig 2.

9. The pipeline filling the vessel with a locking device.

10. Pipeline discharge from a vessel with a locking device.

11. The pipeline control the filling of the vessel with a locking device.

In FIG. 3 shows a transverse section through the vessel 4 and the position of the valve 15 before ignition.

12. The shell of the vessel.

13. The nozzle.

14. Valve seat.

15. The valve.

16. The spring.

17 . Bellows.

18 . Body.

19 . Sleeve.

20 . Sleeve.

21 . Grund-axle box.

22 . Seal.

23 . Seal

In FIG. 4 shows a transverse section of the vessel 4 and the position of the valve 15 after actuating the actuator 8 at the time of ignition.

The heat-sealing chamber can have a length of up to 30 m; therefore, vessels 4 for the preparation of superheated water have an elongated shape with nozzles 13 placed at regular intervals to extinguish the ignition of material 2 anywhere in the technological apparatus 1 .

Technological slots 2 , located at the beginning and at the end of technological apparatus 1 , are intended for introducing into the chamber a rolled semi-finished product of linoleum and its release from the chamber at the end of the polymerization process, as well as to minimize heat leakage from the working space of technological apparatus 1 to the outside. When extinguishing a fire, technological slots are designed to exit the air displaced by steam from the technological apparatus.

The vessel 4 is designed to fill with water, receive and store a supply of superheated water during operation of the technological apparatus 1 .

The bracket 5 is intended for mounting the vessel 4 in the technological apparatus 1 .

The ignition detection sensor 6 is designed to register a fire and transmit a fire signal to the controller 7 .

The controller 7 is designed to process the signal from the sensor 6 and transmit the command signal to the actuator 8 .

The actuator 8 is designed to open the valve 15 .

The pipeline filling the vessel with a locking device 9 is designed to fill the vessel 4 with water and sealed cutoff of the vessel 4 from an external water supply network.

The pipeline drain from the vessel with a locking device 10 is designed to drain water from the vessel 4 .

The pipeline control the filling of the vessel with a locking device 11 is designed to control the filling of the vessel 4 and hermetic cutoff from the environment after complete filling.

The nozzle 13 is designed to release a steam-water mixture into the working space of the technological apparatus 1 .

The valve seat 14 is designed to ensure the tightness of the vessel after closing the valve 15 .

The valve 15 is designed to tightly close the nozzle 13 in the process of filling it, heating the water, the operation of the process apparatus until ignition.

The spring 16 is designed to close the valve 15 and ensure its tightness against the valve seat 14 .

The bellows 17 is designed to provide a tight insulation of the inner space of the vessel 4 from the space of the technological apparatus 1 and the production room.

The housing 18 is designed to accommodate parts of the device.

The sleeve 19 is designed to tighten one of the seals 22 and the end of the bellows 17 .

The sleeve 20 is designed to adjust and provide the necessary compression force of the spring 16 .

The axle box 21 is designed to tighten the seal 22 , seal 23 , bellows 17 , spring 16 .

Seals 22 and 23 are intended for additional insurance of the tightness of the bellows 17 .

The principle of operation of the device for extinguishing steam ignitions

Before starting the process of thermogelling the semi-finished linoleum, the vessel 4 is filled with water (softened water, condensate) through the vessel filling pipeline with the locking device 9 . At the same time, the locking device on the drain line 10 must be closed, and the position of the valve 15 must correspond to FIG. 3. After water begins to pour out through the filling control pipe of the vessel with the locking device 11 , the locking device on the filling pipe 9 is closed, and then the locking device on the filling monitoring pipe 11 is closed.

The device is ready to go.

When the working space of the technological apparatus 1 is heated to a temperature of 180 ° C and its output is in operation, the water in the vessel 4 is heated to the same temperature at the same time. The temperature of the working medium in the technological apparatus 1 , and hence the water in the vessel 4 , is controlled and adjusted by an automated process control system.

When a protected material 3 ignites inside the technological apparatus 1 , a fire detection sensor 6 is activated, which transmits a signal to the controller 7 . The controller 7 processes the signal from the sensor 6 and sends a command signal to the actuator 8 . The actuator 8 is actuated and drives the valve 15 to the position in accordance with FIG. 4. In addition, the controller 7 sends a signal to turn off the heat supply system to the technological apparatus 1 and to deenergize the internal electrical receivers of the technological apparatus 1 .

When the valve 15 is closed and the water temperature is 180 ° C, the pressure inside the vessel 4 will be 10 bar (10.2 atmospheres).

When the valve 15 is opened, the pressure inside the vessel drops sharply to the pressure inside the technological apparatus - atmospheric pressure. The water overheated to a temperature of 180 ° C instantly boils, and the resulting steam-water mixture through the nozzle 13 enters the working space of the technological apparatus 1 . Steam fills the internal space of the technological apparatus 1 , and superheated dispersed water intensively evaporates inside the technological apparatus 1 , increasing the concentration of steam and decreasing the concentration of oxygen. The oxygen concentration in the air inside the technological apparatus 1 drops to a level at which combustion becomes impossible (when extinguishing with steam it is 15% or less). The water remaining in the vessel 4 below the level of the nozzle 13 (Fig. 4) continues to boil due to internal heat and residual heat of the working space and structures of the technological apparatus 1 . Water vapor through the nozzle 13 enters the working space and provides steam from the technological apparatus 1 through the technological slots 2 , preventing air flow into the chamber. This ensures the concentration of oxygen inside the technological apparatus 1 at a level of less than 15%. Along with a decrease in the oxygen concentration inside the technological apparatus 1, there is a certain decrease in temperature in the combustion zone, as well as a flame failure from the surface of the protected material by 3 jets of a steam-water mixture.

Justification of the principle of operation of a device for extinguishing steam ignitions

A spring 16 is needed to close the valve 15 while filling the vessel 4 with water. After filling the vessel 4 with water and cutting it off from the external water supply network and from the external environment, the valve is additionally sealed by increasing the internal pressure P in the vessel 4 when the water is heated in the process of the technological apparatus 1 entering the operating mode. Additional force F pressing the valve 15 to the valve seat 14 occurs due to the internal pressure P inside the vessel 4 and will be equal to the product of the pressure P by the area of the annular surface between the outer diameter d _{2 of the} valve 15 and the diameter d ₁ :

F = Pπ (d ₂ ² –D _one ² )/four,

while the outer diameter of the fit of the valve 15 to the seat of the valve 14 should be greater than d ₁ .

The diameter d of the nozzle 13 should be optimally selected in order to ensure the necessary flow rate of steam and dispersed water into the internal space of the technological apparatus 1 in accordance with fire extinguishing standards and at the same time not to increase the dimensions of the vessel and device parts. In this case, a sufficient length of the jet of the steam-water mixture must be ensured. In practice, with the internal dimensions of the heat-sealing chamber 30 m × 3.5 m × 2 (h) m and the temperature of superheated water 180 ° С, the nozzle diameter will be in the range d = 12 ... 22 mm . The diameter of the nozzle also depends on their quantity.

The size of the annular gap between a valve surface 15 and valve seat 14 of the annular gap should provide a minimum area of the nozzle opening area 13 d.

When depressurizing a sealed vessel from a working to atmospheric pressure, not all superheated water turns into steam, but only part of it. Abrupt boiling of superheated water occurs with rapid vaporization and gradual cooling of the water to a temperature of 100 ° C. If the temperature of superheated water is 180 ° C, then when its pressure is released to atmospheric pressure, about 7 m ^{3 of} steam is released from 1 m ^{3 of} superheated water. The water remaining in the vessel after the steam-water mixture leaves is cooled to a temperature of 100 ° C and its further boiling is carried out due to the heat coming from the heated structures of the technological apparatus.

Thus, based on the operating temperature inside the technological apparatus and the volume of its working space, when designing a device for extinguishing fires by steam, the volume of the vessel (s) and the size A are calculated (Fig. 3).

The approximate amount of steam generated by boiling overheated water can be determined from the diagram shown in FIG. five.

The implementation of the invention

The invention can be applied at the enterprises of the chemical, construction, woodworking industries for extinguishing fires in closed process devices, drying and temperature chambers, galleries, tunnels operating at atmospheric pressure and a temperature of the working medium above 100 ° C.

The invention can be used as an independent means of extinguishing fires, and simultaneously with other means of extinguishing fires. The device can be used to quickly cut off a certain volume of the technological apparatus, camera, gallery, tunnel, etc. at the time of ignition from the spread of flame in other parts of them, before the main volumes of extinguishing agent are supplied to the working medium in the normal fire extinguishing mode.

In one technological apparatus there may be several vessels 4 . The location of the vessels 4 may be different. In FIG. 1 shows two vessels 4 . Possible installation locations of the main or additional vessels 4 are shown by dashed circles. Vessel 4 can be divided into separate airtight compartments or separate vessels of smaller volumes with their own filling, drain and filling control pipelines, valves, sensors and actuators. In this case, it is possible to extinguish the fire directly in a separate, specific area of the technological apparatus.

The disadvantage of the invention is that in practice the device will be effective at a temperature of 130 ° C and above. At temperatures below 130 ° C, the volume of steam generated after boiling of superheated water is small and to obtain it in quantities sufficient to extinguish a fire, it is necessary to sharply increase the volume of vessels or their number.

The advantage of the invention is that to obtain steam and superheated water does not require an external heat source. Superheated water is obtained in a closed volume due to the heat of the working medium, and additional heat supply is not required to maintain the temperature and pressure of superheated water in the vessel. The invention can be applied at enterprises that do not have their own heat-power workshops, steam boiler rooms, steam lines.

The vessel 4 of the device for extinguishing fires by steam is not subject to the existing rules of the device and the safe operation of steam and hot water boilers, steam pipelines and hot water because it cannot be assigned to any of the following devices:

- to steam or hot water boilers, as does not have a furnace for burning fuel, and the resulting superheated water and steam are not used outside the device itself;

- to boilers, as It is not a heat exchanger and is not used to heat network water or to obtain water of other parameters;

- to waste heat boilers, as the technological process inside the technological apparatus is not exothermic, the heat of the chemical reaction is not released and is not used;

- to pipelines of steam or hot water since The device does not transport steam or hot water.

Nevertheless, to ensure the safe operation of the device, vessels, pipelines and valves must be manufactured and selected in full accordance with the requirements of the current device rules and the safe operation of steam and hot water boilers, steam pipelines and hot water.

The design and shape of vessels, valves, actuators can be very diverse. To design and equip valve devices, components and parts of shut-off, safety and control valves of indirect action that are commercially available for boilers and pipelines of steam and hot water can be used. Actuators according to the principle of action can be electric, pneumatic, hydraulic, steam, including those using the energy of a steam-water mixture contained in a hermetically sealed vessel of the device itself.

The device can be manufactured by the repair and mechanical workshop of the enterprise.

Claims (1)

A device for extinguishing steam ignitions inside a process apparatus operating at atmospheric pressure and a temperature of the working medium above 100 ° C, consisting of a hermetically sealed vessel with steam-water mixture spray nozzles and valves, located inside the process apparatus and completely filled with water, a vessel filling pipe, a drain pipe water from the vessel, the pipeline for monitoring the filling of the vessel, fire detection sensors, controller, actuators, characterized in that for extinguishing The combustion inside the technological apparatus uses water vapor, which is formed inside a hermetically sealed vessel as a result of rapid evaporation of the required volume of superheated water inside the vessel, due to a sharp decrease in its pressure at the temperature of the working medium to atmospheric pressure, which is achieved by opening the valves, This water is heated in a hermetically sealed vessel due to the heat of the working environment.

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