CN114652989A - Storage tank fire extinguishing system for large area fires - Google Patents
Storage tank fire extinguishing system for large area fires Download PDFInfo
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- CN114652989A CN114652989A CN202011534737.3A CN202011534737A CN114652989A CN 114652989 A CN114652989 A CN 114652989A CN 202011534737 A CN202011534737 A CN 202011534737A CN 114652989 A CN114652989 A CN 114652989A
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- storage tank
- foam
- ejector
- fire extinguishing
- fire
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
- A62C31/12—Nozzles specially adapted for fire-extinguishing for delivering foam or atomised foam
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/28—Accessories for delivery devices, e.g. supports
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
Abstract
The invention relates to the technical field of petrochemical storage tank fire extinguishing, and discloses a storage tank fire extinguishing system for large-area fire, wherein the storage tank fire extinguishing system is used for storing a storage tank of liquid, the storage tank fire extinguishing system further comprises a foam generating device, an ejector and an ejector installation base frame, the ejector installation base frame and the storage tank are arranged at intervals, the ejector is installed on the ejector installation base frame and is higher than the top of the storage tank, and a foam extinguishing agent outlet of the foam generating device is communicated with an inlet of the ejector. The fire extinguishing system for the storage tank can effectively extinguish various fire types such as a full-liquid-level fire of the storage tank, a local fire of the tank top, a storage liquid overflow fire and the like.
Description
Technical Field
The invention relates to the technical field of fire extinguishing of storage tanks in petrochemical industry, grain and oil industry, coal chemical industry and the like, in particular to a storage tank fire extinguishing system for large-area fire.
Background
At present, a vertical ordinary pressure holding vessel for petrochemical industry field all is provided with fixed foam fire extinguishing systems mostly, the top at the holding vessel is installed to the sprayer, take place the full area fire disaster in the jar after, often the tank deck is lifted or is break away from the holding vessel, after the burning a period, the tank wall can warp, to jar internal curvature, foam sprayer and the relevant pipeline damage that leads to the top, cause fixed foam fire extinguishing systems paralysed, especially large-scale floating roof holding vessel takes place the full area fire disaster after, the in-tank combustion area is big, fixed foam fire extinguishing systems can all suffer destruction failure usually.
Therefore, aiming at fire forms such as the storage tank full-area fire, the storage tank floating plate oil spill fire and the like, the fire extinguishing is implemented by mainly adopting a movable fire monitor to remotely spray the fire extinguishing agent, and the fire extinguishing is implemented by adopting a plurality of fire trucks to surround the storage tank to spray the fire extinguishing agent in a submerged manner for medium and small storage tanks; for the whole area fire of the large-scale storage tank, the large-flow jet fire extinguishing is mainly implemented by adopting the movable fire monitor and the remote water supply system, because the hot air flow is strong, the heat radiation is high, the foam monitor is far away from the fire tank, the kinetic energy of the foam jet flow passing through the flame body is low, so that a large amount of foam is taken away by the hot air flow or is broken at high temperature, according to the Japanese experimental test, more than 60 percent of foam loss is caused, so that the movable foam fire extinguishing needs higher fire water supply strength, the movable foam fire extinguishing efficiency is not high, the fire water supply difficulty is high, and the application feasibility is not high.
Therefore, it is highly desirable to develop a fire extinguishing system for a storage tank that can effectively extinguish a full-level fire in the storage tank.
Disclosure of Invention
The invention aims to provide a storage tank fire extinguishing system for a large-area fire, which can effectively extinguish the full-liquid-level fire of a storage tank.
In order to accomplish the above objects, the present invention provides a storage tank fire extinguishing system for a large area fire, the storage tank fire extinguishing system for storing a liquid storage tank, the storage tank fire extinguishing system further comprising a foam generating device, a sprayer, and a sprayer mounting base frame, the sprayer mounting base frame being spaced apart from the storage tank, the sprayer being mounted on the sprayer mounting base frame and having a height exceeding a top of the storage tank, a foam extinguishing agent outlet port of the foam generating device being in communication with an inlet port of the sprayer.
Preferably, the storage tank fire extinguishing system includes a fire dam in which a plurality of the storage tanks are provided, the plurality of storage tanks are disposed at intervals from each other, the injector mounting base frame is located at an inner region of the fire dam, and one or more of the injectors are mounted on the injector mounting base frame.
Preferably, the orientation of the injection port of each said injector is adjustable.
Preferably, a plurality of said storage tanks are provided spaced apart from one another around said injector mounting base.
Preferably, the height of the ejector exceeds the top of the highest of the plurality of storage tanks by 1m to 5 m.
Preferably, the furthest distance between the injector and the tank mid-axis is no more than 80 m.
Preferably, the foam generating device comprises a foam mixed liquid supply device, a compressed gas supply device and a gas-liquid mixing device, wherein an output port of the foam mixed liquid supply device is communicated with a foam input port of the gas-liquid mixing device, an output port of the compressed gas supply device is communicated with a gas input port of the gas-liquid mixing device, and an output port of the gas-liquid mixing device is communicated to the ejector through a foam extinguishing agent supply pipeline.
Preferably, a relay air supply joint is arranged on the foam extinguishing agent supply pipeline, the relay air supply joint is positioned between the fire bank and the foam generating device, and an output port of the compressed air supply equipment is connected to the relay air supply joint.
Preferably, the storage tank fire extinguishing system further comprises a control system, and the control system is electrically or wirelessly connected with the foam mixed liquid supply device and the compressed gas supply device respectively to control the flow rate of the material supplied to the gas-liquid mixing device by the foam mixed liquid supply device and the compressed gas supply device.
Preferably, the control system is electrically or wirelessly connected with the injector for controlling the injection flow rate and the injection port orientation of the injector.
Preferably, the storage tank fire suppression system includes at least one ejector layer provided on the ejector mounting base frame at intervals in a height direction, each of the ejector layers including a plurality of the ejectors provided at intervals in a circumferential direction of the ejector mounting base frame.
Preferably, the storage tank fire suppression system includes at least two of the ejector layers, and the ejectors in adjacent ejector layers are staggered.
Preferably, the storage tank fire suppression system further comprises a cooling water spray device disposed above the ejector.
Preferably, the storage tank fire suppression system further comprises a video monitor disposed atop the ejector mounting pedestal.
In the storage tank fire extinguishing system for large-area fire, the ejector installation base frames are independently arranged outside the storage tank at intervals of a certain distance from the storage tank, so that the influence of fire explosion accidents of the storage tank on the ejector is reduced, the using safety and effectiveness of the ejector are still guaranteed after the storage tank is in fire or explosion, and the problems that the existing fire extinguishing system is damaged and failed due to the fact that the tank top is lifted or separated from the storage tank and the tank wall is deformed after the existing fire extinguishing system is in full-area fire or explosion in the tank are solved; compared with the large-flow jet fire extinguishing method implemented by adopting a mobile fire monitor and a remote water supply system, the storage tank fire extinguishing system has the advantages that the jet mounted on the jet mounting base frame can be closer to the storage tank, the problems that long-range jet such as the fire monitor cannot be close to the fire tank and the foam loss rate is high are solved, the close-range accurate jet is effectively realized, the effective utilization rate of the foam extinguishing agent is improved, particularly, when the storage tank fire extinguishing system is used for fire fighting in a tank area with a plurality of storage tanks, the jet mounting base frame can be mounted between the storage tanks in the tank area, and when a fire disaster occurs, the jet is directly jetted from the inside of the tank area, so that the close-range accurate jet is effectively realized; furthermore, in the storage tank fire extinguishing system, the installation height of the ejector exceeds the top of the storage tank, the ejector is aligned with the storage tank and sprays the foam extinguishing agent in a downward-rushing mode, so that the improvement of the spraying kinetic energy of the foam extinguishing agent is facilitated, and the problems that the kinetic energy of foam jet flow formed by spraying foam at the elevation angle of a ground fire monitor is small, the penetration force of flame is weak, and the propelling speed at the liquid level is low are solved. The plurality of ejectors are arranged in a concentrated mode, so that the concentrated fire extinguishing agent jet flow is guaranteed to shoot to flames, and compared with the mode that ejectors are arranged in a distributed mode in the existing storage tank, the plurality of fire extinguishing agent jet flows can better resist the damage of the flames, reduce the loss of the fire extinguishing agent, increase the fire extinguishing agent injected into the tank and improve the fire extinguishing efficiency.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 shows a schematic top view of a storage tank fire suppression system for large area fires according to an embodiment of the present invention;
fig. 2 illustrates an installation position relationship among a storage tank, a sprinkler installation base frame, and a sprinkler in the storage tank fire extinguishing system for a large area fire of fig. 1.
Description of the reference numerals
1 injector mounting base frame; 2, an ejector; 3, a storage tank; 4 a foam extinguishing agent supply line adapter; 5 relay gas supply joint; 6, controlling the system; 7, a fire dike; 8, supplying equipment for foam mixed liquid; 9 a compressed gas supply device; 10 gas-liquid mixing device
Detailed Description
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
In the present invention, it is to be understood that the terms "away", "toward", "circumferential", "axial", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and also correspond to the orientations or positional relationships actually used; "inner and outer" refer to the inner and outer relative to the contours of the components themselves and are not intended to indicate that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The invention provides a storage tank fire extinguishing system for large-area fire, which is used for a storage tank 3 for storing liquid and further comprises a foam generating device, an ejector 2 and an ejector installation base frame 1, wherein the ejector installation base frame 1 is arranged at a distance from the storage tank 3, the ejector 2 is arranged on the ejector installation base frame 1 and is higher than the top of the storage tank 3, and a foam extinguishing agent outlet of the foam generating device is communicated with an inlet of the ejector 2.
In the storage tank fire extinguishing system for large-area fire, the ejector installation base frame 1 is independently arranged outside the storage tank 3 at a certain distance from the storage tank 3, so that the influence of the ejector 2 on the storage tank 3 is reduced, the use safety and effectiveness of the ejector 2 are still guaranteed after the storage tank 3 is in fire or explosion, and the problems that the existing fire extinguishing system is damaged and failed due to the fact that the tank top is lifted or separated from the storage tank and the tank wall is deformed after the existing fire extinguishing system is in full-area fire or explosion in the tank are solved; compared with the large-flow jet fire extinguishing method implemented by adopting a mobile fire monitor and a remote water supply system, the storage tank fire extinguishing system has the advantages that the ejector 2 arranged on the ejector mounting base frame 1 can be closer to the storage tank 3, the problems that long-range jet of the fire monitor and the like cannot be close to the fire tank and the foam loss rate is high are solved, the close-range accurate jet is effectively realized, the effective utilization rate of the foam extinguishing agent is improved, and particularly, when the storage tank fire extinguishing system is used for fire fighting in a tank area with a plurality of storage tanks 3, the ejector mounting base frame 1 can be arranged between the storage tanks 3 in the tank area, and when a fire disaster occurs, the ejector 2 directly jets from the inside of the tank area, so that the close-range accurate jet is effectively realized; furthermore, in the storage tank fire extinguishing system, the installation height of the ejector 2 exceeds the top of the storage tank 3, the ejector 2 is aligned with the storage tank 3 and sprays foam extinguishing agent in a downward-rushing mode, so that the improvement of the spraying kinetic energy of the foam extinguishing agent is facilitated, and the problems that the kinetic energy of foam jet flow formed by spraying foam at the elevation angle of a ground fire monitor is small, the penetration force of flame is weak, and the propelling speed at the liquid level is low are solved.
In some embodiments, the storage tank fire suppression system includes a fire bank 7, a plurality of the storage tanks 3 are disposed on the fire bank 7 within the fire bank 7, the plurality of the storage tanks 3 are disposed at intervals from each other, the injector mounting base frame 1 is located in a central area of the fire bank 7, and a plurality of the injectors 2 are mounted on the injector mounting base frame 1. In general, for example, a petrochemical tank farm generally includes a plurality of storage tanks 3, and a fire dam 7 is specially provided at the tank farm for arranging the plurality of storage tanks 3, in which case it is preferable to arrange the injector-mounting base frame 1 at a central area of the fire dam 7 so that the injector-mounting base frame 1 can cope with fire extinguishing to the respective storage tanks 3; further, a plurality of ejectors 2 may be provided for the plurality of storage tanks 3, and the specific number of ejectors 2 is determined by the number of storage tanks 3 and the storage capacity (specification such as storage tank volume, storage tank diameter, and storage tank height) of the storage tanks 3, for example, when the number of storage tanks 3 is about 6, the number of ejectors 2 should be provided to have a capability of suppressing a fire from 2 storage tanks 3 at the same time in consideration of simultaneous ignition of 2 storage tanks 3. When the number of the storage tanks 3 is 1 or 2, the injector mounting base frame 1 may be installed at an intermediate position outside the storage tank fire dam 7 so that the distance between the injector mounting base frame and the centers of the 2 storage tanks is equal to or less than 80 m.
It is further preferred that a plurality of said storage tanks 3 are arranged spaced apart from each other around said injector mounting base frame 1, that the storage tanks 3 on the fire dam 7 are arranged to be mounted substantially around the injector mounting base frame 1, or that the injector mounting base frame 1 is selectively mounted on the fire dam 7 in a central position surrounded by the storage tanks 3, so that the injector mounting base frame 1 is able to take into account fire fighting of the respective storage tank 3, and that as far as possible an effective spray range is maintained between the respective storage tank 3.
If some tank field installation sprayer installation bed frames 1 are realized, the existing storage tanks 3 are scattered in a distributed mode, fire fighting of each storage tank 3 cannot be achieved through one sprayer installation bed frame 1, at least two sprayer installation bed frames 1 can be arranged, and the sprayer installation bed frames 1 can share one set of foam generation device.
In general, in order to obtain a good dive injection effect, the height of the ejector 2 exceeds the top of the highest storage tank 3 among the plurality of storage tanks 3 by 1m to 5 m. Furthermore, in order to allow the sprayed foam extinguishing agent to efficiently reach the storage tank 3 and to spray the storage tank 3 more efficiently, the farthest distance between the ejector 2 and the central axis of the storage tank 3 is not more than 80m, whereby the area of the spray discharged from the ejector 2 concentrated on the floor can cover substantially the entire liquid surface of the storage tank 3, and a fire can be spread over the entire liquid surface of the storage tank 3 more efficiently.
In some embodiments, there may be more ejectors 2, and in this case, for the arrangement of the ejectors 2 on the ejector mounting base frame 1, the storage tank fire extinguishing system includes at least one ejector layer arranged on the ejector mounting base frame 1 at intervals in the height direction, each ejector layer includes a plurality of the ejectors 2 arranged at intervals in the circumferential direction of the ejector mounting base frame 1, for example, the ejectors 2 may be arranged at intervals in one layer in the circumferential direction of the ejector mounting base frame 1, or the ejectors 2 may be arranged in two or more layers, and the ejectors 2 in each layer are arranged at intervals in the circumferential direction of the ejector mounting base frame 1.
Further, the storage tank fire suppression system comprises at least two of the ejector layers, and the ejectors 2 in adjacent ejector layers are staggered so that the ejectors 2 are as far as possible out of the way when ejecting.
It can be understood that when the storage tank fire extinguishing system comprising a plurality of ejectors 2 is in use, the number of ejectors 2 to be opened can be selected according to the fire intensity, and the ejectors 2 can act on one storage tank at the same time to form a foam extinguishing agent jet with a larger volume from a plurality of foam extinguishing agent jets, the foam extinguishing agent jet at the periphery protects the foam extinguishing agent jet at the inside, so that the damage of the foam extinguishing agent due to thermal radiation is reduced, and compared with the way of dispersing around the storage tank 3, the way of intensively ejecting the ejectors 2 realizes the concentrated ejection of the foam extinguishing agent jets, improves the flow energy of the foam extinguishing agent jets, is beneficial to reducing the loss of the foam extinguishing agent, and improves the flame force of the foam extinguishing agent jets.
A plurality of sprayers in the embodiment are arranged in a centralized mode, fire extinguishing agent jet flow is guaranteed to emit flame in a centralized mode, and compared with the mode that sprayers are arranged in a distributed mode in an existing storage tank, a plurality of strands of fire extinguishing agent jet flows can better resist flame damage, the loss of fire extinguishing agents is reduced, the fire extinguishing agent amount injected into the tank is increased, and the fire extinguishing efficiency is improved.
Preferably, the fire extinguishing system for storage tank further includes a cooling water spray device disposed above the sprayer 2 to spray cooling water when the storage tank is in fire such that the sprayer 2, the sprayer mounting base frame 1 and other associated delivery pipes and control devices are in a high temperature environment, for protecting the sprayer 2, the sprayer mounting base frame 1 and other associated delivery pipes and control devices, and the cooling water spray device may include, for example, a cooling water delivery pipe, a cooling water spray head, a high pressure water pump, and the like.
And, preferably, the storage tank fire extinguishing system further comprises a video monitor arranged on the top of the injector mounting base frame 1 to monitor the state of the storage tank and the state of fire, for example, the video monitor can be set to be rotatable at 360 degrees, so that the staff can timely make appropriate fire extinguishing operation and measures according to the fire.
In some embodiments, the direction of the spraying port of each sprayer 2 is adjustable, for example, the sprayer 2 may be arranged to be rotatable at 270 ° or 360 °, the sprayer 2 may be provided with a pitch angle and a pitch angle control, so that each sprayer 2 may be oriented at a desired angle for fire suppression of each storage tank, and the spraying angle of the sprayer 2 may also be adjusted, so that the foam extinguishing agent jet is sprayed into a designated storage tank at an optimal angle, the spraying angle of the sprayer 2 is adjusted at any time according to the flame change during fire suppression, the effect of each sprayer 2 in the whole storage tank fire extinguishing system is optimized to the maximum, the foam extinguishing agent is sprayed accurately in a high-pitch manner through the sprayer 2, and the fire suppression of the whole area of the storage tank is realized better.
The whole storage tank fire extinguishing system can be provided with a control system 6, wherein the control system 6 is electrically or wirelessly connected with the ejector 2 for remote control so as to control the ejection flow rate and the ejection opening orientation of the ejector 2; and the control system 6 can also be electrically connected with the video monitor and/or the cooling water spray device for controlling the monitoring angle of the video monitor and controlling the opening and closing of the cooling water spray device.
In addition, the wires of the control system 6 arranged on the injector mounting base frame 1 and the pipelines for conveying the foam extinguishing agent can be covered with a heat insulation material layer for protection; the ejector 2 can adopt a Laval tube structure to increase the jet range of the foam extinguishing agent.
With regard to the arrangement of the foam generating device, in the illustrated embodiment, the compressed gas foam is used for fire extinguishing, and compared with the common air-breathing foam fire extinguishing, the compressed gas foam fire extinguishing is beneficial to improving the fire extinguishing capability of the foam extinguishing agent.
Specifically, the foam generating device comprises a foam mixed liquid supply device 8, a compressed gas supply device 9 and a gas-liquid mixing device 10, wherein an output port of the foam mixed liquid supply device 8 is communicated with a foam input port of the gas-liquid mixing device 10, an output port of the compressed gas supply device 9 is communicated with a gas input port of the gas-liquid mixing device 10, and an output port of the gas-liquid mixing device 10 is communicated to the ejector 2 through a foam extinguishing agent supply pipeline.
The compressed gas foam extinguishment is superior to the air suction type foam extinguishment in fire extinguishing capability because the foaming mode is changed. Compressed air foam extinguishment utilizes the gas-liquid mixing equipment 10 to fully mix foam mixed liquid and compressed gas to generate a uniform, fine and stable foam extinguishing agent which has the characteristics of short extinguishing time, strong afterburning resistance and the like.
According to the recommended value of NFPA11, the minimum supply strength of foam mixed liquor of a negative pressure type (air suction type) foam system of a fixed top storage tank for responding to a full-area fire is 4.1L/min square meter, and the minimum supply strength of foam mixed liquor of a compressed gas foam system is 1.63L/min square meter. It can be seen that the water usage of the compressed air foam system is much lower than that of the negative pressure type foam system for the same fire. For the whole area fire fighting of a large storage tank, the supply intensity of the compressed gas foam is only 60 percent of that of the air suction type foam.
Preferably, the pressure at the compressed gas inlet of the gas-liquid mixing device 10 is set to 0.6MPa to 1.0MPa so that a sufficient amount of the foam mixture is supplied to the gas-liquid mixing device 10. The number of the gas-liquid mixing devices 10 in the storage tank fire extinguishing system is determined according to actual needs, and one or more gas-liquid mixing devices 10 can be arranged. Generally, from the viewpoint of sufficient mixing of the foam extinguishing agent, the process flow rate of the single gas-liquid mixing apparatus 10 is preferably controlled to be 100-150L/s.
In addition, since the medium output from the gas-liquid mixing device 10 is compressed gas foam, the volume of the foam is increased by 7 to 8 times as large as that of the foam mixture at normal pressure, and in order to maintain the pressure of the foam in the pipeline, it is preferable that the pipe diameter of the output pipe of the gas-liquid mixing device 10 is 1.8 to 2 times as large as that of the pipe diameter from the foam mixture supply device 8 to the gas-liquid mixing device 10.
And, the compressed gas supply device 9 is used for supplying high-pressure gas, and may adopt a mode of connecting large air compressor units in parallel, or more preferably adopts a liquefied medium such as liquid nitrogen to supply gas. Furthermore, a foam fire extinguishing agent supply line adapter 4 is provided outside the fire dam 7 to connect the foam fire extinguishing agent supply line(s) with the foam fire extinguishing agent delivery pipe on the fire dam 7.
Preferably, a relay gas supply joint 5 is provided on the foam extinguishing agent supply line, the relay gas supply joint 5 is located between the fire dam 7 and the foam generating device, and an output port of the compressed gas supply device 9 is connected to the relay gas supply joint 5.
Because the compressed gas foam is the mixture of gas and foam, it is a kind of "soft" material, the volume is compressible, in the course of transportation, the foam flow of anterior segment can be extruded by the foam flow of rear, and then the compressed gas foam can shrink, lead to the velocity of flow to reduce, in addition, because the viscosity of bubble increases, compare with the foam mixed liquor, the boundary layer between foam and pipe wall thickens, the transport resistance also increases, this has aggravated the adhesion of compressed gas foam layer and pipe wall, has increased transport resistance, in addition, in the course of foam transportation, along with the extension of distance, the foam can break and separate out water, the foam liquid deposit of precipitation is in the delivery line. Therefore, a relay gas supply joint 5 is arranged, an output port of the compressed gas supply device 9 is connected to the relay gas supply joint 5, a multi-stage pressurization conveying technology is adopted, the compressed gas supply device 9 supplies gas to the gas-liquid mixing device 10 to participate in foaming, and besides, a part of compressed gas is also separated to be conveyed to the fire dam 7 and a foam extinguishing agent supply pipeline of the foam generating device, so that the power of compressed gas foam flow in the foam extinguishing agent supply pipeline is increased, the foam flowing speed is accelerated, the spraying kinetic energy of the sprayer 2 is increased, the fire extinguishing capacity is improved, meanwhile, gas injected into the foam conveying pipeline also participates in secondary foaming of separated foam liquid, the foam quantity is increased, and the foam utilization rate is improved.
Also, it will be understood that the number of the relay gas supply connections 5 may be increased appropriately according to the length of the foam extinguishing agent supply line, and for example, one relay gas supply connection 5 may be provided for each 100-300m foam extinguishing agent supply line to ensure that the tip of the injector 2 has sufficient injection kinetic energy.
The control system 6 of the storage tank fire extinguishing system may be electrically or wirelessly connected (for example, by any suitable wireless connection control method such as RF wireless control or bluetooth wireless control) to the foam mixture supply device 8 and the compressed gas supply device 9, respectively, to control the flow rates of the materials supplied to the gas-liquid mixing device 10 by the foam mixture supply device 8 and the compressed gas supply device 9, and to adjust the ratio of the foam mixture supplied to the gas-liquid mixing device 10 by the foam mixture supply device 8 to the compressed air supplied to the gas-liquid mixing device 10 by the compressed gas supply device 9.
The storage tank fire extinguishing system is suitable for various normal-pressure storage tank areas in the industries of petrifaction, grain and oil, wine making, coal chemical industry and the like, such as an inner floating roof storage tank, a vault storage tank, an outer floating roof storage tank and the like.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention. Including each of the specific features, are combined in any suitable manner. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.
Claims (14)
1. A storage tank fire suppression system for large area fires, the storage tank fire suppression system includes a storage tank (3) for storing liquid, characterized in that, the storage tank fire suppression system still includes foam generating device, sprayer (2) and sprayer installation bed frame (1), sprayer installation bed frame (1) with storage tank (3) interval sets up, sprayer (2) are installed on sprayer installation bed frame (1) and highly exceed the top of storage tank (3), the foam suppressant delivery outlet of foam generating device with the input port of sprayer (2) intercommunication.
2. A storage tank fire extinguishing system for large area fires according to claim 1, characterized in that the storage tank fire extinguishing system comprises a fire dike (7), a plurality of storage tanks (3) are arranged within the fire dike (7), the plurality of storage tanks (3) are arranged at a distance from each other, the ejector mounting base frame (1) is located in an inner area of the fire dike (7), and one or more ejectors (2) are mounted on the ejector mounting base frame (1).
3. Storage tank fire extinguishing system for large area fires according to claim 2, characterized in that the orientation of the injection openings of the injectors (2) is adjustable.
4. A storage tank fire suppression system for large area fires according to claim 2, characterised in that a plurality of the storage tanks (3) are arranged spaced apart from each other around the ejector mounting base frame (1).
5. Storage tank fire extinguishing system for large area fires according to claim 2, characterized in that the height of the ejector (2) exceeds the top of the highest storage tank (3) of the plurality of storage tanks (3) by 1m-5 m.
6. Storage tank fire extinguishing system for large area fires according to claim 2, characterized in that the furthest distance between the ejector (2) and the middle axis of the storage tank (3) does not exceed 80 m.
7. The storage tank fire extinguishing system for large area fires according to claim 1, wherein the foam generating device comprises a foam mixture supply device (8), a compressed gas supply device (9), and a gas-liquid mixing device (10), wherein an output port of the foam mixture supply device (8) communicates with a foam input port of the gas-liquid mixing device (10), an output port of the compressed gas supply device (9) communicates with a gas input port of the gas-liquid mixing device (10), and an output port of the gas-liquid mixing device (10) communicates with the ejector (2) through a foam extinguishing agent supply line.
8. The storage tank fire extinguishing system for large area fires according to claim 7, characterized in that the foam extinguishing agent supply line is provided with a relay gas supply connection (5), which relay gas supply connection (5) is located between the fire dam (7) and the foam generating device, and the outlet of the compressed gas supply apparatus (9) is connected to the relay gas supply connection (5).
9. The storage tank fire extinguishing system for large area fires according to claim 7, further comprising a control system (6), the control system (6) being electrically connected with the foam mixed liquid feeding apparatus (8) and the compressed gas feeding apparatus (9), respectively, to control the flow rate of the material supplied by the foam mixed liquid feeding apparatus (8) and the compressed gas feeding apparatus (9) to the gas-liquid mixing apparatus (10).
10. Storage tank fire extinguishing system for large area fires according to claim 7, characterized in that the control system (6) is electrically or wirelessly connected with the ejector (2) for controlling the ejection flow and ejection opening orientation of the ejector (2).
11. A storage tank fire suppression system for large area fires according to claim 1, comprising at least one ejector layer arranged at intervals in the height direction on the ejector mounting base frame (1), each ejector layer comprising a plurality of the ejectors (2) arranged at intervals in the circumferential direction of the ejector mounting base frame (1).
12. Storage tank fire extinguishing system for large area fires according to claim 11, characterized in that the storage tank fire extinguishing system comprises at least two ejector layers and that the ejectors (2) in adjacent ejector layers are staggered.
13. Storage tank fire extinguishing system for large area fires according to claim 1, characterized in that it further comprises a cooling water spraying device arranged above the ejector (2).
14. A storage tank fire suppression system for large area fires according to claim 1, further comprising a video monitor disposed on top of the ejector mounting pedestal (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011534737.3A CN114652989A (en) | 2020-12-22 | 2020-12-22 | Storage tank fire extinguishing system for large area fires |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011534737.3A CN114652989A (en) | 2020-12-22 | 2020-12-22 | Storage tank fire extinguishing system for large area fires |
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| CN114652989A true CN114652989A (en) | 2022-06-24 |
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| CN202011534737.3A Pending CN114652989A (en) | 2020-12-22 | 2020-12-22 | Storage tank fire extinguishing system for large area fires |
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