CN204261233U - A kind of fire-fighting system for arch-roof tank - Google Patents
A kind of fire-fighting system for arch-roof tank Download PDFInfo
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- CN204261233U CN204261233U CN201420559156.9U CN201420559156U CN204261233U CN 204261233 U CN204261233 U CN 204261233U CN 201420559156 U CN201420559156 U CN 201420559156U CN 204261233 U CN204261233 U CN 204261233U
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- roof tank
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 84
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 71
- 238000007667 floating Methods 0.000 claims abstract description 49
- 239000007921 spray Substances 0.000 claims abstract description 37
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 34
- 230000005514 two-phase flow Effects 0.000 claims abstract description 10
- 239000012530 fluid Substances 0.000 claims abstract description 5
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000000889 atomisation Methods 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 6
- 239000001301 oxygen Substances 0.000 abstract description 6
- 229910052760 oxygen Inorganic materials 0.000 abstract description 6
- 239000000779 smoke Substances 0.000 abstract description 5
- 238000005507 spraying Methods 0.000 abstract description 4
- 206010002660 Anoxia Diseases 0.000 abstract description 3
- 241000976983 Anoxia Species 0.000 abstract description 3
- 206010003497 Asphyxia Diseases 0.000 abstract description 3
- 206010021143 Hypoxia Diseases 0.000 abstract description 3
- 230000007953 anoxia Effects 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 abstract description 2
- 238000003860 storage Methods 0.000 description 10
- 239000003921 oil Substances 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
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- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 241000876443 Varanus salvator Species 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
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- 230000007423 decrease Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000003032 molecular docking Methods 0.000 description 2
- 239000008400 supply water Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000003197 gene knockdown Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 239000000341 volatile oil Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The utility model is a kind of fire-fighting system for arch-roof tank, comprises firing-fighting medium source, transmits the fire protection pipeline of firing-fighting medium, firing-fighting medium is sprayed onto the flusher of ignition point in arch-roof tank; Described flusher is be distributed in the shower nozzle on described floating plate, and described shower nozzle is two-fluid spray shower nozzle.According to the technical solution of the utility model, when arch-roof tank catches fire, the water smoke of the nitrogen that can be sprayed very soon by the two-phase flow spraying nozzle be distributed in tank and steam composition, these water smokes are filled with the space in arch-roof tank, ignition point in sealing chamber and oxygen, ignition point is put out a fire due to anoxia asphyxia, and a large amount of steam can take away a large amount of heats simultaneously, makes the temperature of ignition point not reach burning-point and prevent from reviving.
Description
Technical field
The utility model relates to a kind of oil tank fire fighting device field, particularly a kind of fire-fighting system for vault standing tank.
Background technology
In petrochemical enterprise, oil storage tank general structure form is more common in arch-roof tank, and according to the difference of structure, arch-roof tank can be divided into fixed tank and internal floating roof tank.Fixed tank also claims vault standing tank or arch-roof tank.
Dome roof tank refers to that tank deck is spherical crown shape, tank body is columniform a kind of steel vessel.Dome roof tank manufacture is simple, cheap, so at home and abroad many sector applications are the most extensive, the most frequently used volume is 1000-10000 cubic meter, at present, the maximum volume of domestic Dome roof tank has reached 30000 cubic metres, and petrochemical industry generally stores not volatile heavy oil etc. with such arch-roof tank.
The general structure of arch-roof tank is as follows:
At the bottom of tank: assembled by steel plate at the bottom of tank, the steel plate in the middle part of at the bottom of tank is center plate, and the steel plate of periphery is margin plate.Margin plate can adopt stripe board, also can adopt cambered plate.Generally, during storage tank internal diameter <16.5m, bar shaped margin plate should be adopted, during storage tank internal diameter >=16.5m, arcuate edge listrium should be adopted.
Tank skin: tank skin is formed by the welding of multi-turn steel plate, is divided into telescopic and orthoscopic.
Telescopic tank shell circumferential welded seam adopts overlap joint, and longitudinal seam is docking.This form of the many employings of Dome roof tank, its advantage is convenient to each circle wallboard group pair, adopts upside-down construction safer.
Orthoscopic tank shell circumferential welded seam is docking.Advantage is that diameter is identical from top to bottom for tank skin entirety, is specially adapted to internal floating roof tank, but group is higher to installation requirement, difficulty is also larger.
Tank deck: tank deck has the welding of polylith fanning strip to form spherical crown shape, adopts band steel to make reinforcement, adopt lap weld between each fanning strip inside tank deck, the angle ring (or claiming fore shaft) on whole tank deck and tank shell top is integrally welded.
All there is very conflagration potential safety hazard in petrochemical enterprise, belong to fire safety management emphasis place in production management process, and the oil storage tank as the important component part of petrochemical enterprise is then take precautions against the most important thing.In present stage, petrochemical enterprise usually adopts froth fire extinguishing system for arch-roof tank, one or more technological means of facility such as security against fire such as movement (fixing) fire water monitor and smoke extinguishing system etc. are carried out strick precaution and puted out a fire to save life and property, but effect is not satisfactory.
Summary of the invention
The purpose of this utility model adopts froth fire extinguishing system, facility such as security against fire such as movement (fixing) fire water monitor and smoke extinguishing system etc. to carry out to arch-roof tank the deficiency that fire-fighting protection can not meet the requirement of user at present to overcome; a kind of fire-fighting system of vault standing tank is provided; this fire-fighting system mounting spray head in tank; the mixing fog of a large amount of nitrogen and steam can be sprayed; while anoxia asphyxia fire extinguishing is adopted to ignition point; the heat cooling utilizing water vapor absorption a large amount of, makes the material temperature of ignition point can not reach a little and the fire extinguished is revived.
The technical solution of the utility model is: a kind of fire-fighting system for arch-roof tank, comprises firing-fighting medium source, transmits the fire protection pipeline of firing-fighting medium, firing-fighting medium is sprayed onto the flusher of ignition point in arch-roof tank; Described firing-fighting medium source comprises the fire water supply and source nitrogen with certain pressure; Described fire protection pipeline comprises fire water or nitrogen is sent to main conduit in arch-roof tank and lateral from fire water supply and source nitrogen; Described lateral distribution be arranged on float on vault tank level floating plate in, and as the skeleton of floating plate; Described main conduit at least comprises two sections of rigid conduits be vertically arranged on through the pillar shape of described floating plate in arch-roof tank, connects flexible duct be communicated with described lateral respectively on the top of rigid conduit; Described flusher is be distributed in the shower nozzle on described floating plate, and described shower nozzle is two-fluid spray shower nozzle.
According to the technical solution of the utility model, when arch-roof tank catches fire, the water smoke of the nitrogen that can be sprayed very soon by the two-phase flow spraying nozzle be distributed in tank and steam composition, these water smokes are filled with the space in arch-roof tank, ignition point in sealing chamber and oxygen, ignition point is put out a fire due to anoxia asphyxia, and a large amount of steam can take away a large amount of heats simultaneously, makes the temperature of ignition point not reach burning-point and prevent from reviving.
Preferred embodiment of the present utility model has: described lateral is the annular two-tube road be distributed on described floating plate, wherein to flow in a circulating line fire water, flowing nitrogen in another root circulating line, these two circulating lines are connected with air inlet pipe with the water inlet pipe of described shower nozzle respectively.Shower nozzle is arranged on above floating plate by installing standpipe, and the spout of two-phase flow shower nozzle is 10-12cm from described floating plate upper surface distance.
In addition, the utility model have employed a kind of this shower nozzle of two-fluid spray shower nozzle and comprises sleeve pipe and nozzle, described sleeve pipe foot is provided with nozzle, the intake tunnel communicated with water inlet pipe is provided with in the middle of described sleeve pipe, be the inlet channel with its isolation around described intake tunnel, described inlet channel communicates with air inlet pipe; Be water nozzle in the middle of described upper end of nozzle, water nozzle is stepped annular, and the large collar extension in top communicates with described intake tunnel, and water nozzle internal upper part is provided with atomization core, and the described little collar extension in nozzle bottom is blind pipe, and centre arranges water spray aperture; Around described upper end of nozzle be connect described in nozzle and the aqueous vapor ring flange of sleeve pipe, be collecting ring below inside aqueous vapor ring flange, the downside of described collecting ring is concordant with described water nozzle lower end; Described collecting ring upper end is communicated with described inlet channel by aqueous vapor ring flange; Be spray chamber on the downside of described collecting ring and water nozzle, described water spray aperture and collecting ring lower end are input to spray chamber, and the wall of spray chamber surrounding arranges spray nozzle.Spray nozzle is narrow slot shape, comprises four narrow slots be crisscross arranged.In sleeve pipe, on the downside of intake tunnel, be provided with internal thread, engage with the external screw thread on described water nozzle top; Described aqueous vapor ring flange both sides connect with described sleeve pipe and nozzle respectively.Nitrogen and water can fully be atomized by this shower nozzle, and can spray from spray nozzle very soon, are full of remaining space in whole arch-roof tank.
In addition, the utility model can also possess automatic fire-extinguishing function, therefore, also comprises monitoring system, and described monitoring system comprises temperature sensing cable in the floating plate established and be all arranged in internal floating roof tank, and Surveillance center and be separately positioned on selection control valve in main conduit; Described temperature sensing cable communicates to connect with described control centre respectively, and each selection control valve in main conduit is controlled by control centre respectively.
Below with reference to drawings and Examples, the utility model is described in detail.
Accompanying drawing explanation
Fig. 1 is embodiment 1 structure chart of the present utility model;
Fig. 2 is embodiment 1 top view of the present utility model;
Fig. 3 is the shower nozzle front view that embodiment of the present utility model adopts;
Fig. 4 is Fig. 3 A-A sectional view;
Fig. 5 is Fig. 3 B enlarged drawing;
Fig. 6 is the water nozzle outline drawing of the utility model embodiment 1 shower nozzle;
Fig. 7 is Fig. 4 sectional view.
In figure: 1, fire water supply, 2, source nitrogen, 3, water valve, 4, gas head, 5, Surveillance center, 6, temperature sensing cable, 7, main conduit, 8, shower nozzle, 9, flexible duct, 10, lateral, 11, pot sidewall, 12, floating plate, 13, tank deck, 801, sleeve pipe, 802, nozzle, 803, water inlet pipe, 804, air inlet pipe, 805, intake tunnel, 806, inlet channel, 807, to cool down ring flange, 808, water nozzle, 809, atomization core, 810, water spray aperture, 811, collecting ring, 812, spray chamber, 813, spray nozzle.
Detailed description of the invention
Embodiment 1, the present embodiment is a kind of fire-fighting system for arch-roof tank, as depicted in figs. 1 and 2, arch-roof tank comprises tank deck 13 and pot sidewall 11, it is the space surrounded with the pot sidewall 11 of cylindricality by ground and tank deck 13, the not volatile oil product of heavy oil grade can be stored within this space, whole fire-fighting system comprises source nitrogen 2 and fire water supply 1, source nitrogen 2 and fire water supply 1 all have any pressure, nitrogen and fire demand water are sent to the pipeline of ignition point in arch-roof tank, in the present embodiment, pipeline adopts iron or other rigidity and the material of the certain high-temperature of ability is made, while so just can being used as pipeline, can also as some support members, as, lateral 10 inherently can use as the skeleton of floating plate 12, when main conduit 7 is holded up in tank, during through floating plate 12, pillar can be fixed as floating plate 12, in the present embodiment, use three rigid conduits holded up as the restriction post of floating plate 12, wherein two pipelines be used for transmitting nitrogen from the bottom of tank to tank deck, fire water is sent to tank deck by a remaining equally pipeline at the bottom of tank, adopt metal or nonmetallic pipeline to communicate with fire water supply 1 and source nitrogen 2 respectively in the bottom of these three pipelines, adopt each employing flexible duct 9 on the top of vertical pipeline close to arch-roof tank tank deck 13 place three pipe interiors are communicated with the lateral 10 of the annular in floating plate 12.Lateral 10 distribution is arranged on and floats in the floating plate 12 of vault tank level, and as the skeleton of floating plate 12; Flusher is the shower nozzle 8 be distributed on floating plate 12 is two-fluid spray shower nozzle.
In the present embodiment, lateral 10 is for being distributed in the annular two-tube road on described floating plate 12, wherein flow in a circulating line fire water, flowing nitrogen in another root circulating line, these two circulating lines are connected with air inlet pipe with the water inlet pipe of described shower nozzle respectively.Shower nozzle 9 is arranged on above floating plate 18 by installing standpipe, and the spout of two-phase flow shower nozzle is 10-12cm from described floating plate upper surface distance.
The shower nozzle used in the present embodiment is as shown in Fig. 3,4,5,6,7, this shower nozzle is a kind of two-phase flow spraying nozzle, use in fire fighting device in the present embodiment, simultaneously to the fog that spray inert gas forms as nitrogen and water, make this fog spread in whole space on fire, isolate the oxygen caught fire in material and air, make ignition point fire smothering due to anoxic, simultaneously due to the cooling of moisture sorption amount of heat, temperature is made not reach the burning-point of material and stop to revive.
As shown in Fig. 3,4,5, the two-phase flow spraying nozzle of the present embodiment forms primarily of sleeve pipe 1 and nozzle 2, and sleeve pipe 801 foot is provided with nozzle 802.Sleeve pipe 801 connects fire water supply 1 and the interface with source nitrogen 2, sleeve pipe 801 has the water inlet pipe 803 be connected with fire water supply 1 and the air inlet pipe 804 communicated with source nitrogen 2, pipeline is all provided with screw thread, can again by adapter roads such as flanges, the intake tunnel 805 communicated with water inlet pipe 803 is provided with in the middle of sleeve pipe 801, be the inlet channel 806 with its isolation around intake tunnel 805, inlet channel 806 communicates with air inlet pipe 804.Here, sleeve pipe 801 puts a more small-bore pipeline by a bigbore pipeline in fact exactly, and the more small-bore pipeline in centre is exactly intake tunnel 805, is exactly inlet channel 806 between two pipelines.
Water nozzle 808 in the middle of nozzle 802 upper end, water nozzle 808 as shown in Figure 6,7, in the present embodiment, water nozzle 808 entirety is stepped annular, be made up of two-section pipeline exactly, in upper pipe diameter, external diameter and internal diameter are greater than outer diameter tube and the internal diameter of bottom respectively, top is called large collar extension, bottom is called little collar extension, and large collar extension communicates with the intake tunnel 805 in the middle of sleeve pipe 801, and water nozzle 808 internal upper part is provided with atomization core 809, the little collar extension in nozzle 802 bottom is blind pipe, and centre arranges water spray aperture 810; Be provided with internal thread on the downside of the interior conduit of intake tunnel 805 in the present embodiment middle sleeve 801 namely in sleeve pipe, engage with the external screw thread on water nozzle 808 top; Aqueous vapor ring flange 807 both sides connect with sleeve pipe 801 and nozzle 802 respectively.Be the aqueous vapor ring flange 807 connecting nozzle 802 and sleeve pipe 801 around nozzle 802 upper end, be collecting ring 811 below inside aqueous vapor ring flange 807, collecting ring 811 is enclosed in outside the little collar extension of water nozzle 808, and the downside of collecting ring 811 is concordant with water nozzle 808 lower end; Collecting ring 811 upper end is communicated with inlet channel 806 by aqueous vapor ring flange 807, puts together, the nitrogen in the inlet channel 806 of annular in sleeve pipe 801 down in spray chamber 812 together with the steam in water nozzle 808 after being atomized core 809 and being atomized.Be spray chamber 812 on the downside of collecting ring 811 and water nozzle 808, water spray aperture 810 and collecting ring 811 lower end are input to spray chamber 812, and the wall of spray chamber 812 surrounding arranges spray nozzle 813.Spray nozzle 813 is narrow slot shape, comprise four narrow slots be crisscross arranged, as shown in Figure 5, the spray nozzle 813 of four narrow slots is had in the present embodiment, be divided into two rows, often arrange two narrow slot spray nozzles 813 be oppositely arranged, high pressure fog during such spray chamber 812 just can fill the air out by these four narrow slots.
The fire-fighting system of the present embodiment or a self-extinguishing, also comprise monitoring system wherein, monitoring system comprises temperature sensing cable 6 in the floating plate established and be all arranged in internal floating roof tank, and control centre 5 and to be separately positioned on air feed main for the air-supplying valve 4 on pipeline with supply water for the water supply valve 3 in pipe; Temperature sensing cable 6 communicates to connect with control centre 5 respectively, and air feed is main to be controlled by control centre 5 for the water supply valve 3 in pipe respectively for the air-supplying valve 4 on pipeline and water supply.Control centre 5 adopts communication cable to communicate to connect with air feed is main for the air-supplying valve 4 on pipeline and the water supply valve 3 supplied water in pipe.
The present embodiment is while the defect of evading existing fire extinguishing system, draw advanced experience, for fire characteristic and the architectural feature of the floating plate of interior arch-roof tank, adopt two-phase flow technology, utilize floating plate structural framework own that water route and gas path pipe are set, arrange nozzle specially used as required by floating plate upper strata, implement tank inside fire extinguishing object.It is advantageous that:
One, blow-off velocity are fast.Aqueous vapor acting in conjunction, forms annular thin water smoke cone, is separated by floating plate surface naked light, suppress entering of oxygen, form the environment knock down the flame that suffocates while fast vaporizing from root compression; Meanwhile, the nitrogen sprayed into and surrounding air merge in time, reduce environmental oxygen concentration, flammable oil gas concentration, and let-down vessel is inner fast, reaches fire extinguishing object.
Two, construction costs economy.The present invention is without the need to arranging pipeline separately, comprehensive utilization water supply steam line forms floating plate load-bearing skeleton, limited increase floating plate cost and quality while realizing extinguishing device function, but from integrated engineering cost, particularly with traditional design fire fighting device scheme comparison, economy is obvious.
Three, maintenance cost is low.The present invention adopts common municipal water pressure level to supply water and low pressure feed nitrogen (≤1.2MPa), without the need to special process, aqua medium can fully utilize municipal fire hydrant pipe network or tap water pipe network supply, nitrogen medium can fully utilize the existing air separation unit supply of petroleum chemical enterprise's production technology link or separate configurations air separation unit is directly separated from air, all there is not period of validity system in two media, do not need to change on time, significantly reduce enterprise's maintenance cost.
Four, resource consumption is few, without secondary disaster.For water resource day by day in short supply, the present invention adopts the principle of water mists, and in fire extinguishing procedure, decrease the consumption of water resource, meanwhile, attack time is short, further decreases the waste of water resource.In addition, nitrogen gas source is in air separation, and direct cost only comprises power consumption and equipment depreciation, has put out a fire not cause any secondary disaster to environment afterwards, meets environmental protection demand for development.
The present embodiment is before carrying out extinguishing effect analysis, the material of arch-roof tank internal structure and floating plate is analyzed, is calculated by precision, utilize water supply network and gas transmission pipeline net work to form floating plate skeleton, alleviate and increase fire extinguishing system and the load that causes, do not affect intensity own and the function of floating plate.According to special two-phase flow shower nozzle effective active area, start to be evenly arranged with storage tank floating plate outer shroud.It is that 10 ~ 12cm is advisable with jet opening distance floating plate apparent height that shower nozzle installs riser length.The security that the present invention supplies in order to ensure extinguishing chemical, floating plate upper space is mainly according to oil storage tank fire or oil gas detonation, easily damage is caused to structure and pipeline, design the main pipeline supply adopting flexible corrosion protection corrosion material to make in the middle part of oil storage tank district for pipeline, and adopt retinue around avoiding pipeline to be wound around, extend service life and reduce maintenance probability.
Compared with the existing oil storage tank fire-fighting precautionary measures, the major advantage of the present embodiment is that system response time is short, and blow-off velocity is fast, and resource consumption is few, cost performance is high, and life cycle is long, and maintenance cost is low, Environmental Safety is without secondary disaster etc., and it is applied to internal floating roof tank Be very effective, and imbody has:
1, the present embodiment by fire extinguishing system and floating plate integrated, the nitrogen resource simultaneously utilizing petrochemical enterprise own and municipal water supply or plant area's fire hydrant water supply network, whole synthesis utilization rate is high; In addition, aqueous phase and the gas phase operating pressure of the present embodiment all belong to low pressure category, less demanding to pipe material, obviously reduce the engineering construction cost of petrochemical enterprise.
2, the present embodiment adopts nitrogen and water mists to act on fire extinguishing simultaneously, and two media all belongs to environmental protection extinguishing chemical, can not produce secondary disaster.Therefore, need not confirm when fire alarm directly to start, shorten the fire extinguishing system response time, the condition of a fire was controlled in the early stage of development.
3, the operation principle of the shower nozzle that the present embodiment is supporting is cutting burning things which may cause a fire disaster root, and separate combustible and flame, root burning things which may cause a fire disaster adopted water mists cooling, suffocate until extinguish completely, top flame adopts nitrogen rapid mixing, reduces oxygen concentration, reaches fire extinguishing object.The employing of two-phase flow technology enhances fire extinguishing effectiveness, and extinguishing effect is obvious.
4, the present embodiment is nozzle specially used has patented technology, is controlled by shower nozzle drop size of water mist below 400 μm, and in extremely short fire extinguishing procedure, water consumption is few, and vaporizes in temperature-fall period, not easily causes the secondary disasters such as ponding; The nitrogen simultaneously sprayed into directly can be thrown into air, can not work the mischief to environment, safety and environmental protection.
5, in the present embodiment, the nitrogen of employing is inert gas, the phenomenon such as there will not be usefulness to reduce in storage process, rotten, therefore, its life cycle is limited hardly, the limitation that the foam solution having evaded existing foaming system must renew for 2 years, has saved maintenance cost; Generally be configured with large-scale nitrogen-making device and large-scale nitrogen storage tank in petrochemical enterprise, nitrogen can ensure nitrogen supply (NS) quantity and quality at any time by air separation, cheap, without the need to worrying the impact that fire-fighting dose is limited simultaneously.
6, the nozzle specially used modular construction hole minimum of a value in the present embodiment is 3mm, and low to water quality requirement, without the need to increasing too much filtration facility, regular maintenance cost is almost nil, greatly reduces the maintenance cost of enterprise.
Claims (7)
1., for a fire-fighting system for arch-roof tank, comprise firing-fighting medium source, transmit the fire protection pipeline of firing-fighting medium, firing-fighting medium be sprayed onto the flusher of ignition point in arch-roof tank; It is characterized in that:
Described firing-fighting medium source comprises the fire water supply (1) and source nitrogen (2) with certain pressure;
Described fire protection pipeline comprises fire water or nitrogen is sent to main conduit (7) in arch-roof tank and lateral (10) from fire water supply (1) and source nitrogen (2); Described lateral (10) distribution be arranged on float on vault tank level floating plate (12) in, and as the skeleton of floating plate (12); Described main conduit (7) at least comprises two sections of rigid conduits be vertically arranged on through the pillar shape of described floating plate in arch-roof tank, connects flexible duct (9) be communicated with described lateral (10) respectively on the top of rigid conduit;
Described flusher is be distributed in the shower nozzle (8) on described floating plate (12), and described shower nozzle (8) is two-fluid spray shower nozzle.
2. the fire-fighting system for arch-roof tank according to claim 1, it is characterized in that: described lateral (10) is for being distributed in the annular two-tube road on described floating plate (12), wherein to flow in a circulating line fire water, flowing nitrogen in another root circulating line, these two circulating lines are connected with air inlet pipe with the water inlet pipe of described shower nozzle respectively.
3. the fire-fighting system for arch-roof tank according to claim 2, it is characterized in that: described shower nozzle (9) is arranged on above floating plate (18) by installing standpipe, the spout of two-phase flow shower nozzle is 10-12cm from described floating plate upper surface distance.
4. the fire-fighting system for arch-roof tank according to claim 1 or 2 or 3, it is characterized in that: described shower nozzle (8), comprise sleeve pipe (801) and nozzle (802), described sleeve pipe foot is provided with nozzle (802), the intake tunnel (805) communicated with water inlet pipe (803) is provided with in the middle of described sleeve pipe (801), described intake tunnel (805) is around and the inlet channel of its isolation (806) that described inlet channel communicates with air inlet pipe (804);
Water nozzle (808) in the middle of described nozzle (802) upper end, water nozzle (808) is stepped annular, the large collar extension in top communicates with described intake tunnel (805), water nozzle (808) internal upper part is provided with atomization core (809), the described little collar extension in nozzle (802) bottom is blind pipe, and centre arranges water spray aperture (810);
Around described nozzle (802) upper end be connect described in nozzle (802) and the aqueous vapor ring flange (807) of sleeve pipe (801), aqueous vapor ring flange (807) is collecting ring (811) below inner side, and the downside of described collecting ring (811) is concordant with described water nozzle (808) lower end; Described collecting ring (811) upper end is communicated with described inlet channel (806) by aqueous vapor ring flange (807);
Described collecting ring (811) and water nozzle (808) downside are spray chamber (812), described water spray aperture (810) and collecting ring (811) lower end are input to spray chamber (812), the wall of spray chamber (812) surrounding are arranged spray nozzle (813).
5. the fire-fighting system for arch-roof tank according to claim 4, is characterized in that: described spray nozzle (813) is narrow slot shape, comprises four narrow slots be crisscross arranged.
6. the fire-fighting system for arch-roof tank according to claim 4, it is characterized in that: in described sleeve pipe (801), intake tunnel (805) downside is provided with internal thread, engages with the external screw thread on described water nozzle (808) top; Described aqueous vapor ring flange (807) both sides connect with described sleeve pipe (801) and nozzle (802) respectively.
7. the fire-fighting system for arch-roof tank according to claim 1, it is characterized in that: also comprise monitoring system, described monitoring system comprises temperature sensing cable (6) in the floating plate established and be all arranged in internal floating roof tank, and Surveillance center (5) and the selection control valve that is separately positioned in main conduit (7); Described temperature sensing cable (6) communicates to connect with described control centre respectively, and each selection control valve in main conduit (7) is controlled by control centre respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420559156.9U CN204261233U (en) | 2014-09-27 | 2014-09-27 | A kind of fire-fighting system for arch-roof tank |
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| CN201420559156.9U CN204261233U (en) | 2014-09-27 | 2014-09-27 | A kind of fire-fighting system for arch-roof tank |
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| CN204261233U true CN204261233U (en) | 2015-04-15 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105597248A (en) * | 2016-02-25 | 2016-05-25 | 安徽建筑大学 | Annular ultra-fine water spray fire-extinguishing system of oil storage tank |
| CN105641829A (en) * | 2016-02-25 | 2016-06-08 | 安徽建筑大学 | Radial ultra-fine water mist fire-extinguishing system for oil storage tank |
| CN105664401A (en) * | 2016-02-25 | 2016-06-15 | 安徽建筑大学 | Radial water mist fire extinguishing system for oil storage tank |
| CN106362327A (en) * | 2016-08-26 | 2017-02-01 | 周洋鑫 | Dome roof tank provided with fire fighting facility |
| CN106730541A (en) * | 2016-12-05 | 2017-05-31 | 浙江海洋大学 | A kind of high pressure nitrogen for external floating roof tank drives fine spray extinguisher |
| CN111991734A (en) * | 2020-08-17 | 2020-11-27 | 广州福勒自动控制设备科技有限公司 | Top-filling high-pressure fine water mist environment-friendly fire-fighting system |
| CN112735076A (en) * | 2020-12-22 | 2021-04-30 | 中车资阳机车有限公司 | Device and method for initial fire detection of fixed top storage tank |
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2014
- 2014-09-27 CN CN201420559156.9U patent/CN204261233U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105597248A (en) * | 2016-02-25 | 2016-05-25 | 安徽建筑大学 | Annular ultra-fine water spray fire-extinguishing system of oil storage tank |
| CN105641829A (en) * | 2016-02-25 | 2016-06-08 | 安徽建筑大学 | Radial ultra-fine water mist fire-extinguishing system for oil storage tank |
| CN105664401A (en) * | 2016-02-25 | 2016-06-15 | 安徽建筑大学 | Radial water mist fire extinguishing system for oil storage tank |
| CN106362327A (en) * | 2016-08-26 | 2017-02-01 | 周洋鑫 | Dome roof tank provided with fire fighting facility |
| CN106362327B (en) * | 2016-08-26 | 2019-12-17 | 周洋鑫 | Vault jar with fire control facility |
| CN106730541A (en) * | 2016-12-05 | 2017-05-31 | 浙江海洋大学 | A kind of high pressure nitrogen for external floating roof tank drives fine spray extinguisher |
| CN111991734A (en) * | 2020-08-17 | 2020-11-27 | 广州福勒自动控制设备科技有限公司 | Top-filling high-pressure fine water mist environment-friendly fire-fighting system |
| CN112735076A (en) * | 2020-12-22 | 2021-04-30 | 中车资阳机车有限公司 | Device and method for initial fire detection of fixed top storage tank |
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