CN102058948A - Extinguishing method and device by water-mist of preheated water - Google Patents
Extinguishing method and device by water-mist of preheated water Download PDFInfo
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- CN102058948A CN102058948A CN2011100253980A CN201110025398A CN102058948A CN 102058948 A CN102058948 A CN 102058948A CN 2011100253980 A CN2011100253980 A CN 2011100253980A CN 201110025398 A CN201110025398 A CN 201110025398A CN 102058948 A CN102058948 A CN 102058948A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 285
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000003595 mist Substances 0.000 title claims abstract description 27
- 230000005514 two-phase flow Effects 0.000 claims abstract description 36
- 238000010438 heat treatment Methods 0.000 claims abstract description 35
- 239000007789 gas Substances 0.000 claims description 96
- 239000007921 spray Substances 0.000 claims description 39
- 239000000779 smoke Substances 0.000 claims description 31
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- 238000007592 spray painting technique Methods 0.000 claims description 14
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- 238000009413 insulation Methods 0.000 claims description 7
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- 230000008676 import Effects 0.000 claims description 2
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- 238000000889 atomisation Methods 0.000 abstract description 4
- 238000005507 spraying Methods 0.000 abstract 1
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 12
- 239000001301 oxygen Substances 0.000 description 12
- 229910052760 oxygen Inorganic materials 0.000 description 12
- 238000001704 evaporation Methods 0.000 description 10
- 230000008020 evaporation Effects 0.000 description 10
- 229920006395 saturated elastomer Polymers 0.000 description 9
- 238000010521 absorption reaction Methods 0.000 description 5
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- 238000009835 boiling Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
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- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004604 Blowing Agent Substances 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229920004449 Halon® Polymers 0.000 description 1
- 206010070834 Sensitisation Diseases 0.000 description 1
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- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
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Abstract
The invention relates to an extinguishing method and device by two-phase flow water-mist of preheated water. The method is characterized by comprising the following steps of: preheating the water before extinguishing fire, guiding the preheated water into a two-phase flow ultrafine water mist nozzle through a spiral-flow atomization mixer, and spraying the water mist to extinguish fire by adopting a stepwise extinguishing manner, i.e. carrying out single-phase flow preheated water extinguishment within 30 seconds after the system is started, and preheating a protected area; and starting a gas path to carry out two-phase flow fire extinguishment after 30 seconds. The invention further discloses an extinguishing device by water-mist of the preheated water, which is characterized in that a heating device is additionally arranged in an extinguisher, wherein the water-mist extinguishing device is used for carrying out the single-phase flow preheated water fire extinguishment within 30s after the system is started, the protected area is preheated, and the gas path is started after 30s for carrying out the two-phase flow fire extinguishment.
Description
Technical field
The present invention is a kind of thin water spray fire-extinguishing method and device of preheating water, is the substitute products of haloalkane extinguishing system, is mainly used in fire-fighting domain.
Background technology
Water as extinguishing chemical since the mankind exist, just obtained using widely, from original with the container fire extinguishing that is filled with water, the various devices that utilize the water fire extinguishing have been produced to modern fire hydrant, automatic sprinkler system, water spray fire extinguish system etc., how make on the problem that fire-fights by water, aspect two of the materials (as blowing agent) that people's main research thinking concentrates on the device that utilizes water and mix other in water.Employed water all is the water under the normal temperature state, and for the fire extinguishing effect of (＜100 ℃) water under the condition of high temperature discovery is not arranged also.Set forth the generation background and the extinguishing mechanism of preheating water extinguishing method below.
The extinguishing mechanism of water mainly is to suffocate and cool off, and reduces space oxygen concentration and fire scene temperature.The evaporation of water process is divided into two stages: the phase I is that water is heated to 100 ℃ from environment temperature, and second stage is the process that 100 ℃ water becomes 100 ℃ of steam.No matter from the heat absorption angle of still suffocating, the second stage of water evaporation plays a part most critical, because this stage water of 100 ℃ becomes 100 ℃ of steam rapidly, volume increases 1680 times, plays smothering action.The heat absorption capacity of water also mainly concentrates on second stage, and phase I 1kg water is heated to 100 ℃ of needs heat 418kJ by 0 ℃; And the heat that the water of 100 ℃ of 1kg becomes 100 ℃ steam to be needed is 2259kJ (gasification latent heat), and the caloric receptivity of second stage is 5.4 times of phase I.Therefore the fire extinguishing effect and the attack time of water depend on second stage, although absorb the sub-fraction heat in the phase I, but need for a long time, because the process need that heat is passed to water for a long time, a lot of water do not have enough time to evaporate heat absorption in this time, all poured off in vain, the fire extinguishing effect is weakened greatly.And hot water or boiling water have been heated near 100 ℃, and the directly evaporation of back of coming out makes most of water can both all be used to fire extinguishing, has improved the fire extinguishing effect widely.
Water is because the fire extinguishing character of " green " is considered to breathe out one of desirable substitute of dragon (HALON) extinguishing chemical, and the fine water mist fire-extinguishing system of employing also is considered to be hopeful most to substitute the fire extinguishing system of breathing out dragon.Therefore number of research projects has been carried out to fine water mist fire-extinguishing system in the home and abroad, the product of a lot of fine water mist fire-extinguishing systems occurred, but mainly there is the following aspects deficiency in these fine water mist fire-extinguishing systems:
1. put out little fire difficulty.This situation occurring is because fine mist fire-fighting mechanism causes, fine water mist fire-extinguishing system is a total flooding extinguishing system, its dominant mechanism is to suffocate, the caloric value of little fire is very little, oxygen demand is also little, therefore little fire makes thin water smoke evaporation capacity very little, and big space can't suffocate by a spot of steam, and it is little fiery difficult therefore to cause thin water smoke to go out.And the initial stage that fire takes place mainly is that the intensity of a fire is all less, thin water smoke as automatic fire protection system mainly at initial fire disaster since do not go out little fire, must etc. intensity of a fire change greatly just can knock out, therefore the meaning that water mist system has lost automatic fire protection system is installed, let alone substitutes the Kazakhstan dragon.
2. B (liquid) class of going out fire is easy, the A that goes out (solid) class fire difficulty, particularly smoldering fire.This mainly is because category-B fire burns speed is very fast, and caloric value is bigger, and in the space of sealing, the heat absorption and the effect of suffocating of thin water smoke are very obvious, therefore puts out easier.And the category-A fire is at the fire early period of origination, and burning velocity is slower, and caloric value is less, and oxygen demand is also very little, can not make a large amount of thin water smoke evaporations, and the poor effect of suffocating of therefore thin water smoke causes the A that goes out (solid) class fire difficulty.For smoldering fire, this situation is just more serious.
3. fire extinguishing difficulty in winter or colder guard space.Colder space environment temperature is lower, and the saturated vapor of water vapour forces down.Environment temperature and saturated vapor pressure relation curve are as shown in Figure 1.Though thin atomized water spray is to the most of evaporation in flame top, but steam is because flame buoyancy moves to other backs, zone, space because temperature is lower, and saturated vapor forces down, and steam will condense into water once more and drop to ground, can't effectively dilute oxygen concentration, weak effect suffocates.As shown in Figure 1, when being 30 ℃ as if environment temperature, saturated vapor pressure only is 0.042, and oxygen concentration only is diluted to 20.15%, and oxygen concentration still maintains higher level, and flame combustion will still acutely be difficult to be extinguished, and can't embody the smothering action of thin water smoke this moment.Zone (or ignition source peripheral region) temperature is brought up to 80 ℃ if will put out a fire, and this moment, saturated vapor pressure can reach 0.467, and oxygen concentration can be diluted to 14.3%, shows according to interrelated data, if oxygen concentration is lower than 14%, flame can't be kept burning and extinguish.Therefore, when environment temperature was 80 ℃, flame can be extinguished at short notice, fire-fighting efficiency height, good extinguishing effect.
For addressing these problems, U.S.'s patent of invention number is 5678637 patent of invention, and name is called: proposed a kind of preheating water extinguishing method and device that utilizes the P.T.C thermostat that water is heated in tank in the patent of " extinguishing device and method ".This invention is that the heating of the normal-temperature water in the tank is become hot water, and utilize evaporation of water in water tank, to form steam with the shower nozzle place, preheating water and steam are transported to the shower nozzle place by two circuits, preheating water, arrives flame region and puts out a fire because thereby the bubble blast is broken into the very little droplet of diameter from shower nozzle ejection back.
There is an obvious defects in this invention.Given fogdrop diameter is 25 μ m in this patent, the thin water smoke that particle diameter is so tiny in case from the fine mist spray head ejection because itself and surrounding air produce its temperature of strong convection current and drop to environment temperature immediately, can't keep the temperature advantage of preheating water.When especially winter or fire extinguishing space temperature were low, the method can not effectively stamp out a fire.Mention the droplet sinking speed in this patent simultaneously and be about 0.02m/s, droplet moves to the flame place needs long time, even do not arrive flame and just evaporate, cover flame dilution oxygen concentration thereby therefore can not effectively form steam, so its fire extinguishing has little effect.
Another problem that exists in this patent of invention is that thin water smoke is to arrive the fine mist spray head place by the water that the steam that the evaporation of the water in the water tank forms drives in the water tank, and steam simultaneously is transported to the shower nozzle place by another set of pipeline, drives thin water smoke ejection and forms the needed nuclear of bubble simultaneously and come assisted atomization.Utilize steam to drive water and with steam as the gas phase in the two phase flow, the one, the steam that can not produce sufficiently high pressure power in heating process drives water and sprays fast, improves thin water smoke flow and thin water smoke speed improves atomization quality; The 2nd, the generation of steam is wayward, and its production process has retardance in other words, big water gaging must be heated to the steam that sufficiently high temperature could produce required pressure, and this needs considerable time, and this is quite unfavorable to fire extinguishing.
At the deficiency of above-identified patent, this patent has proposed a kind of new preheating water extinguishing method and device.The method and device use high-pressure inert gas to drive preheating water and inert gas participates in atomizing, can accurately control the temperature, flow, opening time of preheating water etc.; Can make the thin water smoke ejection of preheating back temperature remain on higher temperature again, thereby the advantage of maintenance preheating water can quick extinguishing.
According to the experience of life, winter, people were when shower, always earlier shower nozzle were transferred to the hottest maximum, allow its spray a period of time carry out preheating after, regulate hot water to the suitable flow of proper temperature then and carry out shower, just can not feel this moment cold.Use for reference this experience, the present invention takes preheating water segmented fire-fighting mode: the phase I only opens the water route and carries out the single-phase flow fire extinguishing when opening in system, the thin water smoke flow of preheating this moment is bigger, fogdrop diameter is bigger, can effectively carry out preheating to the protected field, time set is 30s, can be according to protected field and fire size adjustment; Second stage is opened gas circuit, carry out the two phase flow fire extinguishing, this moment, inert gas sprayed at a high speed from nozzle, drive the atomization of liquid, thin water smoke fogdrop diameter is very little, less than 10 μ m, can maintain higher temperature after the shower nozzle ejection and speed higher, therefore can the rapid evaporation heat absorption and can around flame, form steam and cover flame, thus since this moment saturated vapor pressure higher so can dilute oxygen concentration to reduced levels and can realize putting out a fire fast and effectively.
This extinguishing method is applicable in the existing fine water mist fire-extinguishing system, can replace haloalkane extinguishing system fully, and can effectively put out all kinds of fire.Simultaneously, in order to keep the validity of preheating water, the present invention carries out the single-phase flow fire extinguishing in 30 seconds after system opens, thereby is unlikely to because of the too fast fire extinguishing advantage that loses preheating water of cooling after the therefore thin greatly water smoke ejection of thin water smoke fogdrop diameter this moment.Simultaneously, thereby fogdrop diameter can utilize thin water smoke to be heated in ground and protected field greatly, thereby the temperature that improves the protected field improves saturated vapor pressure.After 30 seconds, open gas circuit, utilize the thin water smoke of two phase flow to put out a fire.At this moment; the superfine spray that fogdrop diameter is littler is limited from shower nozzle ejection back temperature fall; thereby can keep higher temperature; shorten evaporation time; thereby temperature higher saturated vapor pressure in protected field is higher after passing through the thin water smoke preheating of single-phase flow simultaneously; thereby oxygen concentration can be diluted to reduced levels and realize quick extinguishing in very short time, fire-fighting efficiency is improved greatly.
Summary of the invention
The thin water spray fire-extinguishing method and the device that the purpose of this invention is to provide a kind of preheating water become normal-temperature water in the thin water smoke into hot water exactly, make blow-off velocity fast, good extinguishing effect.And adopt the segmentation opening ways when system opens, preceding 30s only opens the water route preheating is carried out on ground and protected field; Open gas circuit behind the 30s and carry out the two phase flow fire extinguishing.This device can replace existing haloalkane extinguishing system fully, can effectively put out little fire, A (solid) class fire, and smoldering fire can also be implemented fire extinguishing in colder space.
The thin water spray fire-extinguishing method of a kind of preheating water of the present invention, it is characterized in that: this method is that elder generation then with the water after the preheating, imports to water preheat in the ultra-fine air water atomizing nozzle of two phase flow by the spiral-flow type atomizing mixer before fire extinguishing, ejection air water mist is put out a fire; At first open the water route after system starts and carry out the single-phase flow fire extinguishing, open gas circuit after 30 seconds and carry out the two phase flow fire extinguishing.
Realization has following several mode with water preheat:
Wherein, mode (1) is: set up heater in the fine spray extinguisher of preheating water, carry out the electrical heating of water, promptly when fire took place, electromagnetic valve of gas circuit started the back within 5 seconds, made the water in the pressure water bottle flow into electric heater, made water reach preset temperature.
Wherein, mode (2) is: install heater in the pressure water bottle in the fine spray extinguisher of preheating water, directly carry out the electrical heating of water, an electric heater promptly is installed in the pressure water bottle, under the control of temperature control system, make water reach preset temperature.
Wherein, mode (3) is: the showerhead in the fine spray extinguisher of preheating water divides the installing heating element heater, carry out the electrical heating of water, promptly on conventional fine mist spray head and feed pipe, electrical heating elements is installed, choose electrical heating elements power according to capacity of sprinkler and preheat temperature near shower nozzle.Wherein, described shower nozzle is made up of several Laval nozzles.
The fine spray extinguisher of a kind of preheating water of the present invention, this device comprises: cabinet 1, pressure water bottle 2, water bottle pressure indicator 3, a bottle interface 4, urgent manual water valve 5, waterway electromagnetic valve 6, water route pressure indicator 7, high-pressure extinction gas extinguishing agent bottle group pressure indicator 8, urgent manually air valve 9, gas circuit pressure indicator 10, electromagnetic valve of gas circuit 11, high-pressure gas circuit pressure-reducing valve 12, gases at high pressure bus-bar 13, high-pressure gas pipeline 14, spiral-flow type atomizing mixer 15, gases at high pressure extinguishing chemical bottle group 16, water route filter 17, the ultra-fine air water spray painting of Lavalle two phase flow head 18, fire detector 19, fire control alarm 20, cable 21, gas extinguishing agent pipeline 22, water lines 23; Annexation is:
Gases at high pressure extinguishing chemical bottle group 16 is connected to gases at high pressure bus-bar 13 by high-pressure gas pipeline 14, high-pressure extinction gas extinguishing agent bottle group pressure indicator 8 is housed on the gases at high pressure bus-bar 13, gases at high pressure bus-bar 13 1 ends connect spiral-flow type atomizing mixer 15, one end connects high-pressure gas circuit pressure-reducing valve 12, behind high-pressure gas circuit pressure-reducing valve 12, pipeline is divided into two-way, one the tunnel connects urgent manually air valve 9, gas circuit pressure indicator 10, electromagnetic valve of gas circuit 11, and is connected to the ultra-fine air water spray painting of Lavalle two phase flow head 18 by gas extinguishing agent pipeline 22; Another road links to each other with pressure water bottle 2 by a bottle interface 4, water bottle pressure indicator 3 is housed on the pressure water bottle 2, water bottle is by the urgent manual water valve 5 of pipeline, waterway electromagnetic valve 6, water route pressure indicator 7, water route filter 17, and be connected to the ultra-fine air water spray painting of Lavalle two phase flow head 18 by water lines 23, fire detector 19 is connected to fire control alarm 20 by cable 21, and fire alarm control unit 20 connects electromagnetic valve of gas circuit 11, waterway electromagnetic valve 6 by the control cable; It is characterized in that: in this device, further be equipped with heater.
Wherein, this heater is made up of electric heater 24 and pressure switch 25, and water route filter 17 and water lines 23 are connected respectively on the electric heater 24, and pressure switch 25 is connected on the water lines 23.
Wherein, this heater is an installing electric heater in pressure water bottle 2, directly carries out the electrical heating of water, under the control of temperature control system, makes water reach preset temperature; This electrically heated pressure water bottle 2 that directly carries out water is made up of bottle valve 201, heat-insulation layer 202, temperature control system 203, pressure bottle 204 and electric heater 205; Electric heater 205 is positioned at the inside of pressure bottle 204, and temperature control system 203 is positioned at the head of pressure bottle 204, and temperature control system 203 connects bottle valve 201 and electric heater 205, and heat-insulation layer 2 is close to pressure bottle 204 inside.
Wherein, this heater is at the ultra-fine air water spray painting of Lavalle two phase flow head 18 places installing heating, carry out the electrical heating of water, promptly on conventional fine mist spray head and feed pipe, electrical heating elements is installed, choose electrical heating elements power according to capacity of sprinkler and preheat temperature near shower nozzle; Wherein, described shower nozzle is made up of several Laval nozzles.Because when reality was implemented, the nozzle volume was too little, can't install heating wire additional and heat, and big shower nozzle volume is bigger, is easy to install additional resistance wire in big shower nozzle periphery and carries out electrical heating.This ultra-fine air water spray painting of electrically heated two phase flow head 18 that directly carries out water is made up of feed pipe 301, heating 302 and Laval nozzle 303 3 parts, the concrete structure of this kind device has varied, generally is that heating is installed on the shower nozzle 18 or is installed on the feed pipe 301.
The thin water spray fire-extinguishing method of a kind of preheating water of the present invention and device, its advantage and effect are: blow-off velocity is fast, good extinguishing effect, can make thin water smoke keep higher temperature in the fire extinguishing procedure, can replace existing haloalkane extinguishing system fully, and with respect to the fire extinguishing system of existing thin water smoke, can effectively put out little fire, A (solid) class fire, smouldering fire can also be implemented fire extinguishing in colder space.
Description of drawings
Fig. 1 temperature is with the saturated vapor pressure relation curve
Fig. 2 A: preheating water fine spray extinguisher master looks schematic diagram.
Fig. 2 B: preheating water fine spray extinguisher schematic side view.
Fig. 3: installing heater schematic diagram in the pressure water bottle.
Fig. 4: installing heater schematic diagram in the nozzle.
Fig. 5: spiral-flow type atomizing mixer schematic diagram.
Fig. 6: Lavalle two phase flow nozzle.
Number in the figure is described as follows:
1 cabinet, 2 pressure water bottles, 3 water bottle pressure indicators
4 bottles of interface 5 urgent manual water valve 6 waterway electromagnetic valves
7 water route pressure indicators, 8 high-pressure extinction gas extinguishing agent bottle group pressure indicators
9 urgent manually air valve 10 electromagnetic valve of gas circuit 11 gas circuit pressure indicators
12 high-pressure gas circuit pressure-reducing valves, 13 gases at high pressure bus-bars, 14 high-pressure gas pipelines
15 spiral-flow type atomizing mixers, 16 gases at high pressure extinguishing chemical bottles are organized 17 water route filters
The ultra-fine air water spray painting of 18 Lavalle two phase flows head 19 fire detectors
20 fire control alarm, 21 cables, 22 gas extinguishing agent pipelines
23 water lines, 24 electric heaters, 25 pressure switches
201 bottle valves, 202 heat-insulation layers, 203 temperature control systems
204 pressure bottles, 205 electric heaters
301 feed pipes, 302 heatings, 303 Laval nozzles
401 gas joints, the 402 gas part 403 atomizing mixer housings of limiting the quantity of
404 water part 405 water swivels 406 swirl nozzles of limiting the quantity of
407 eddy flow stoppers
The specific embodiment
The thin water spray fire-extinguishing method of a kind of preheating water of the present invention and device, be on the basis of the extinguishing method of the ultra-fine air water mist of two phase flow and device, increase electrothermal method again with water preheat, and adopt the segmentation opening ways to carry out the hot water fire extinguishing, thereby reach good extinguishing effect, the fast purpose of blow-off velocity.
The The Nomenclature Composition and Structure of Complexes of system such as Fig. 2 A, shown in the 2B, system is by cabinet 1, pressure water bottle 2, water bottle pressure indicator 3, a bottle interface 4, urgent manual water valve 5, waterway electromagnetic valve 6, water route pressure indicator 7, high-pressure extinction gas extinguishing agent bottle group pressure indicator 8, urgent manually air valve 9, gas circuit pressure indicator 10, electromagnetic valve of gas circuit 11, high-pressure gas circuit pressure reducer 12, gases at high pressure bus-bar 13, high-pressure gas pipeline 14, spiral-flow type atomizing mixer 15, gases at high pressure extinguishing chemical bottle group 16, water route filter 17, the ultra-fine air water spray painting of Lavalle two phase flow head 18, fire detector 19, fire control alarm 20, cable 21, gas extinguishing agent pipeline 22, water lines 23, electric heater 24, pressure switch 25 is formed.
Wherein, the structure of spiral-flow type atomizing mixer 15 as shown in Figure 5, this apparatus main body partly is a square atomizing mixer housing 403, enclosure interior is a cylindrical hybrid chamber; One columniform gas joint 401 is installed by sealing thread and atomizing mixer housing concentric; One columniform water swivel 405 is by water inlet end vertical install of sealing thread mode with the atomizing mixer housing; Gas joint inlet end is connected with gas cylinder, and gas can be air or other inert gas in this gas cylinder, and the end that the gas joint is connected with housing is equipped with the gas part 402 of limiting the quantity of; The water swivel water inlet end is connected with water storing tank, and wherein the water storing tank first half is connected with gas cylinder, provides driving force by gas cylinder; The water swivel exit connects the water part 404 of limiting the quantity of, and the water part outside of limiting the quantity of is connected with water swivel by screw thread, and inside then is connected with swirl nozzle 406 by screw thread; One eddy flow stopper 407 places and compresses interference fit in the swirl nozzle 406 and with it.
The automatic course of work of present embodiment is as follows: when being holding state in system, gases at high pressure extinguishing chemical in the gases at high pressure extinguishing chemical bottle group 16 by high-pressure gas circuit pressure-reducing valve 12, reduces to duty pressure, by gas extruding pipeline, pass to pressure water bottle 2, make pressure water bottle 2 be in the operating pressure state, urgent manual water valve 5, waterway electromagnetic valve 6, urgent manually air valve 9, electromagnetic valve of gas circuit 11 all is in closed condition, and electric heater 24 is in off-position.Whether gas cylinder group and pressure water bottle be normal when water bottle pressure indicator 3 and high-pressure extinction gas extinguishing agent bottle group pressure indicator 8 indication holding states.If be lower than when pressure 70% is set, fire alarm control unit 20 sends the abnormal operating state alarm, notifies the staff to adjust gases at high pressure extinguishing chemical bottle group 16 or gas circuit pressure-reducing valve 11.
When the space breaking out of fire protected; fire detector 19 is by the sense cigarette; mode such as sensitization or temperature-sensitive is found fire; cable 21 passes to fire alarm control unit 20 with alarm signal; fire alarm control unit 20 alarm of sounding; and send the control signal way solenoid valve 6 of fetching boiling water; press water flow into electric heater 24 after flowing in the spiral-flow type atomizing mixer 15 by water route filter 17; the pressure switch 25 of flow action behind electric heater 24; pressure switch 25 produces the current signal of telecommunication and passes to fire alarm control unit 20 (for preventing the electric heater dry combustion method); fire alarm control unit 20 sends control signal and starts electric heater 24; current flow into the ultra-fine air water spray painting of Lavalle two phase flow head 18 after reaching default temperature through electric heater 24; water route pressure indicator 7 indication water circuit system pressure; show system's normal operating conditions, water smoke is by the fire extinguishing of Lavalle two phase flow shower nozzle 18 ejections at first carrying out single-phase flow.At this moment, the ultra-fine air water spray painting of Lavalle two phase flow head 18 ejection be the thin water smoke of single-phase flow, fogdrop diameter is bigger, thereby so its can heat ground and protected field and make it remain on higher temperature.
The thin atomized water spray of single-phase flow is after 30 seconds, fire alarm control unit 20 sends control signal to electromagnetic valve of gas circuit 11, electromagnetic valve of gas circuit 11 is opened, the gases at high pressure extinguishing chemical is by gas extinguishing agent bottle group 16, by gas bus-bar 13, pressure reducer 12, reduce to duty pressure by gas circuit 22, gas circuit pressure indicator 10 indication gas circuit operating pressure states, arrive spiral-flow type atomizing mixer air-path interface, gas extinguishing agent by 18 ejections of the ultra-fine air water spray painting of Lavalle two phase flow head, carries out the two phase flow fire extinguishing together with water afterwards.After ultra-fine air water mist was sprayed by the ultra-fine air water spray painting of Lavalle two phase flow head 18, fogdrop diameter was very little, greatly about about 10 μ m.Because the single-phase thin water smoke of preceding 30s makes its temperature higher the protected field is carried out preheating, so superfine spray ejection back droplet temperature fall is limited, and the high temperature droplet evaporates the needed time to be shortened greatly.Higher owing to the protected field temperature simultaneously, so the steam-laden vapour pressure is very high, oxygen concentration can drop to lower level in a short period of time, thereby can realize quick extinguishing.After system stamps out a fire, send the signal of telecommunication after perhaps pressure switch 25 is restored and give fire alarm control unit 20, fire alarm control unit 20 sends control signal and closes electric heater 24 earlier, after close waterway electromagnetic valve 6, nozzle only sprays gas extinguishing agent, to reach the effect that prevents the fire resume combustion and absorb flue gas, to have sprayed until the system gas extinguishing chemical, system quits work automatically.
When breaking out of fire, waterway electromagnetic valve 6, electromagnetic valve of gas circuit 11 hinder for some reason and can not open, and can open urgent manual water valve 5, and urgent manually air valve 9 is opened the water route, and the hand switch ejection air water mist of gas circuit start-up system and electric heater 24 is put out a fire.
The preheating of water is directly carried out in the pressure water bottle, and the present invention provides a press water water in bottle electrical heating example, and the pressure water bottle adopts domestic, electric water heater structure and principle.As shown in Figure 3, present embodiment is made up of bottle valve 201, heat-insulation layer 202, temperature control system 203, pressure bottle 204 and electric heater 205.Electric heater 205 is positioned at the inside of pressure bottle 204, and temperature control system 203 is positioned at the head of pressure bottle 204, and temperature control system 203 connects bottle valve 201 and electric heater 205, and heat-insulation layer 2 is close to pressure bottle 204 inside.The power and the heat time heating time of this temperature control system control electric heater 205, and can regulate automatically by temperature control system 203 preset temperatures, make the water in the pressure bottle 204 remain at a preset temperature, the temperature of required water in the time of so not only also can guaranteeing to put out a fire also can guarantee to use water mist system antifreeze in the place of cold.
Embodiment 3. installs heater in the ultra-fine air water atomizing nozzle of two phase flow typical case uses
With installing electrical heating elements on conventional fine mist spray head and the feed pipe, choose electrical heating elements power according to nozzle flow and preheat temperature near shower nozzle.Shown in Fig. 4,6, the ultra-fine air water spray painting of the two phase flow of embodiment of the invention head is made up of feed pipe 301, heating 302 and Laval nozzle 303 3 parts, concrete structure can be varied, generally is that heating is installed on the shower nozzle 18 or is installed on the feed pipe 301.
The course of work of nozzle is as follows: when nozzle was not worked, heating 302 was cold, when nozzle has water smoke or the ejection of thin water smoke, and heating 302 energisings, when nozzle flow was following less than design discharge 50%, electric elements cut off the power supply.Have or not ejection of thin water smoke and thin water smoke flow size to be recorded by the flow sensor that is installed on the water route, and be converted into the signal of telecommunication and be transferred on the fire alarm linkage controller, its implementation procedure is controlled by the fire alarm linkage controller.
Claims (9)
1. the thin water spray fire-extinguishing method of a preheating water, it is characterized in that: this method is earlier with water preheat before fire extinguishing, then with the water after the preheating, import in the ultra-fine air water atomizing nozzle of Lavalle two phase flow by the spiral-flow type atomizing mixer together with inert gas, and the fire-fighting mode ejection air water mist that adopts segmentation to open, put out a fire.
2. thin water spray fire-extinguishing method is opened in segmentation according to claim 1, it is characterized in that: the fire-fighting mode that described segmentation is opened is at first to carry out the single-phase flow fire extinguishing after system's unlatching, opens waterway electromagnetic valve separately preheating water is carried out preheating by the bigger thin water smoke of spiral-flow type atomizing mixer arrival Lavalle two phase flow ultra-fine air water atomizing nozzle ejection back generation fogdrop diameter to the protection zone; Electromagnetic valve of gas circuit is opened and is carried out the two phase flow fire extinguishing after 30 seconds, and the ultra-fine air water mist of ejection two phase flow was put out a fire after preheating water and inert gas produced the ultra-fine air water atomizing nozzle of aerosol tubular flow arrival Lavalle two phase flow by the spiral-flow type atomizing mixer.
3. the thin water spray fire-extinguishing method of a kind of preheating water according to claim 1, it is characterized in that: elder generation is with water preheat before fire extinguishing, be by in the fine spray extinguisher of preheating water, installing heater, the electrically heated mode of carrying out water realizes, promptly when fire takes place, make the water in the pressure water bottle flow into electric heater, make water reach preset temperature.
4. the thin water spray fire-extinguishing method of a kind of preheating water according to claim 1, it is characterized in that: elder generation is with water preheat before fire extinguishing, be by installing heater in the pressure water bottle in the fine spray extinguisher of preheating water, the electrically heated mode of directly carrying out water realizes, one electric heater promptly is installed in the pressure water bottle, under the control of temperature control system, make water reach preset temperature.
5. the thin water spray fire-extinguishing method of a kind of preheating water according to claim 1, it is characterized in that: elder generation is with water preheat before fire extinguishing, be by the installing of the shower nozzle place in the fine spray extinguisher of preheating water heating element heater, the electrically heated mode of carrying out water realizes, promptly on conventional fine mist spray head and feed pipe, electrical heating elements is installed, is chosen electrical heating elements power according to capacity of sprinkler and preheat temperature near shower nozzle.
6. the fine spray extinguisher of a preheating water, this device comprises: cabinet (1), pressure water bottle (2), water bottle pressure indicator (3), a bottle interface (4), urgent manual water valve (5), waterway electromagnetic valve (6), water route pressure indicator (7), high-pressure extinction gas extinguishing agent bottle group pressure indicator (8), urgent manually air valve (9), gas circuit pressure indicator (10), electromagnetic valve of gas circuit (11), high-pressure gas circuit pressure-reducing valve (12), gases at high pressure bus-bar (13), high-pressure gas pipeline (14), spiral-flow type atomizing mixer (15), gases at high pressure extinguishing chemical bottle group (16), water route filter (17), Lavalle two phase flow shower nozzle (18), fire detector (19), fire control alarm (20), cable (21), gas extinguishing agent pipeline (22), water lines (23); Annexation is: gases at high pressure extinguishing chemical bottle group (16) is connected to gases at high pressure bus-bar (13) by high-pressure gas pipeline (14), high-pressure extinction gas extinguishing agent bottle group pressure indicator (8) is housed on the gases at high pressure bus-bar (13), gases at high pressure bus-bar (13) one ends connect spiral-flow type atomizing mixer (15), one end connects high-pressure gas circuit pressure-reducing valve (12), behind high-pressure gas circuit pressure-reducing valve (12), pipeline is divided into two-way, one the tunnel connects urgent manually air valve (9), electromagnetic valve of gas circuit (11), gas circuit pressure indicator (10) is connected to Lavalle two phase flow shower nozzle (18) by gas extinguishing agent pipeline (22); Another road links to each other with pressure water bottle (2) by a bottle interface (4), water bottle pressure indicator (3) is housed on the pressure water bottle (2), water bottle is by the urgent manual water valve of pipeline (5), waterway electromagnetic valve (6), water route pressure indicator (7), water route filter (17), be connected to Lavalle two phase flow shower nozzle (18) by water lines (23), fire detector (19) is connected to fire control alarm (20) by cable (21), and fire alarm control unit (20) connects electromagnetic valve of gas circuit (10), waterway electromagnetic valve (6) by the control cable; It is characterized in that: in this device, further be equipped with heater.
7. the fine spray extinguisher of a kind of preheating water according to claim 6, it is characterized in that: this heater is made up of electric heater (24) and pressure switch (25), water route filter (17) and water lines (23) are connected respectively on the electric heater (24), and pressure switch (25) is connected on the water lines (23).
8. the fine spray extinguisher of a kind of preheating water according to claim 6 is characterized in that: this heater is an installing electric heater in pressure water bottle (2), directly carries out the electrical heating of water, under the control of temperature control system, makes water reach preset temperature; This electrically heated pressure water bottle that directly carries out water is made up of bottle valve (201), heat-insulation layer (202), temperature control system (203), pressure bottle (204) and electric heater (205); Electric heater (205) is positioned at the inside of pressure bottle (204), temperature control system (203) is positioned at the head of pressure bottle (204), temperature control system connects (203) and connects bottle valve (201) and electric heater (205), and heat-insulation layer (202) is close to pressure bottle (204) inside.
9. the fine spray extinguisher of a kind of preheating water according to claim 6, it is characterized in that: this heater is to locate to install heating at the ultra-fine air water spray painting of Lavalle two phase flow head (18), carry out the electrical heating of water, this ultra-fine air water spray painting head is made up of feed pipe (301), heating (302) and Laval nozzle (303) three parts, and heating (302) is installed in shower nozzle (18) and goes up or be installed on the feed pipe (301).
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| CN102408358A (en) * | 2011-12-21 | 2012-04-11 | 河北克尔化工有限公司 | One-step safety production method of guanidine nitrate |
| CN103816635A (en) * | 2013-11-29 | 2014-05-28 | 闫宏 | Porous spray nozzle of superfine dry powder and eruptively-generated aerosol fire extinguishing system |
| CN111790079A (en) * | 2020-06-19 | 2020-10-20 | 易事特集团(河南)有限公司 | Automatic fire extinguishing system for cabinet and automatic fire extinguishing expansion system for cabinet |
| CN112121333A (en) * | 2020-09-24 | 2020-12-25 | 武汉川消智慧消防科技有限公司 | Temperature sensing self-starting extinguishing device and electrical equipment fire extinguishing system using same |
| CN114306984A (en) * | 2020-10-09 | 2022-04-12 | 上海沃尔沃汽车研发有限公司 | Fire extinguishing device and battery test equipment |
| CN115845307A (en) * | 2022-09-09 | 2023-03-28 | 中国空气动力研究与发展中心空天技术研究所 | Water mist inert gas two-phase flow fire extinguishing system based on gas-liquid coaxial centrifugal nozzle |
| CN115887967A (en) * | 2023-01-06 | 2023-04-04 | 北京松山国家级自然保护区管理处(北京市松山林场管理处) | Forest fire extinguishing device with heating and heat-insulating structure and fire extinguishing method thereof |
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| CN102408358A (en) * | 2011-12-21 | 2012-04-11 | 河北克尔化工有限公司 | One-step safety production method of guanidine nitrate |
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| CN112121333B (en) * | 2020-09-24 | 2021-11-09 | 武汉川消智慧消防科技有限公司 | Temperature sensing self-starting extinguishing device and electrical equipment fire extinguishing system using same |
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| CN115845307B (en) * | 2022-09-09 | 2023-08-11 | 中国空气动力研究与发展中心空天技术研究所 | Fine water mist inert gas two-phase flow fire extinguishing system based on gas-liquid coaxial centrifugal nozzle |
| CN115887967A (en) * | 2023-01-06 | 2023-04-04 | 北京松山国家级自然保护区管理处(北京市松山林场管理处) | Forest fire extinguishing device with heating and heat-insulating structure and fire extinguishing method thereof |
| CN115887967B (en) * | 2023-01-06 | 2023-12-29 | 北京松山国家级自然保护区管理处(北京市松山林场管理处) | Forest fire extinguishing device with heating and heat preserving structure and fire extinguishing method thereof |
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