CN104389629A - Gas and solid jet active flame-retarding explosion-suppressing unit - Google Patents
Gas and solid jet active flame-retarding explosion-suppressing unit Download PDFInfo
- Publication number
- CN104389629A CN104389629A CN201410736341.5A CN201410736341A CN104389629A CN 104389629 A CN104389629 A CN 104389629A CN 201410736341 A CN201410736341 A CN 201410736341A CN 104389629 A CN104389629 A CN 104389629A
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- China
- Prior art keywords
- gas
- explosion
- explosion suppression
- flame
- suppression device
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C4/00—Flame traps allowing passage of gas but not of flame or explosion wave
- A62C4/02—Flame traps allowing passage of gas but not of flame or explosion wave in gas-pipes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/08—Rock dusting of mines; Depositing other protective substances
Abstract
A gas and solid jet active flame-retarding explosion-suppressing unit is applicable to flame retardance and explosion suppression for an industrial pipe used for delivering explosive combustible gases and also applicable to explosion suppression for a roadway in which coal mine gas-dust explosion occurs. The gas and solid jet active flame-retarding explosion-suppressing unit comprises an acquisition and control device and a fire extinguishing and explosion suppression device; the acquisition and control device comprises a flame sensor, an acquirer, a signal processor and a controller; the fire extinguishing and explosion suppression device comprises ABC dry chemical fire extinguishing agent, a storage tube, an electromagnetic valve, a relief valve and a high-pressure nitrogen source. By the use of the gas and solid jet active flame-retarding explosion-suppressing unit, the problem that existing explosion suppression facility fail to stop propagation of multiple explosions and fail to dilute harmful gases is solved.
Description
Technical field
The present invention relates to a kind of gas-solid two-phase jet flow initiatively back-fire relief explosion suppression device, be particularly useful for carrying the back-fire relief in the industrial pipeline of the fuel gas with explosion hazard datonation-inhibition, what be also applicable to that coal mine gas coal-dust explosion occurs in tunnel is datonation-inhibition.
Background technology
Since founding of New, there is once the accident totally 24 of more than dead hundred people in colliery, the whole nation, causes 3780 people dead, wherein gas (coal dust) explosion accident 21, dead 3424 people, accident plays number and death toll accounting is respectively 87.5% and 90.58%." safety regulations in coal mine " specifies, highly gassy mine Driving Face in Coal Tunnel should be installed every (pressing down) quick-fried facility, and exploitation has the mine of coal seam liable to dust explosion, must have the measure of prevention and isolated coal-dust explosion.At general large-scale state-owned coal mines, all arrange explosion-proof water barrier by " safety regulations in coal mine " in tunnel, but when there is gas explosion, these flame proof measures are not played should there is effect, even sometimes, these devices strengthen bursting strength on the contrary, facilitate the propagation of blast.Daping Coalmine gas explosion accident investigation in 2004 finds near the work plane installing explosion-proof water barrier, still have 41 miner's death, is an obvious example.In order to prevent methane accumulation from source, increasing colliery increases the input of gas pumping, gas pumping is the measure that effects a permanent cure reducing mine gas emission rate and prevent gas explosion, and country also clearly proposes the gas of down-hole extraction to be used as domestic fuel or industrial chemicals.But in China's coal-mine gas pumping amount, concentration accounts for more than 60% lower than the gas pumping amount of 30% (low concentration gas), the gas density of quite a few is in explosion ratio limit range, and its course of conveying also exists serious potential safety hazard.Be delivered in the process of gas electricity end by pipe long-distance, occur that being mixed into metal fragment friction in tempering or pipeline produces spark once generating end, gas in pipeline just may be detonated, if process not in time, will continue to spread to extraction pump, demolition extraction equipment, even spreads to underground coal mine, causes larger personal injury and property loss." safety regulations in coal mine " specifies, must be equiped with the safety device of anti-backfire, anti feedback and blast protection effect in the system utilizing gas.As can be seen here, effective datonation-inhibition technical measures are all needed badly in coal mine down-hole tunnel and gas conveyer tube.
China makes remarkable progress at explosion-proof flame proof technical elements, as by the brainstorm project research such as country " six or five ", " the Seventh Five-Year Plan ", " eight or five ", " 95 ", have developed 6 kinds of passive type explosion isolation camps (i.e. explosion-insulating water tank fragility canopy, isolated blast water bottle canopy, moistureproof stone-dust barrier, explosion-insulating water tank foam canopy, XGS type explosion isolation camp and KYG type Quick-moving type explosion isolation camp) and 3 kinds of automatic explosion suppression devices (i.e. ZGB-Y type triggered barrier, the automatic air-generating explosion suppression device of ZYB-S type, YBW-1 type non-transformer trigger-type explosion suppression device).Being not difficult to find by carrying out labor to these devices, also there are some problems needing to solve in the research of current gas explosion suppression aspect:
(1) effective range of application of passive isolated blast establishment is narrow, is mostly disposable apparatus, but occurs sometimes in colliery repeatedly to explode, and now passive explosion isolation device will lose flame proof effect.
(2) Explosion suppressant of explosion suppression device only has a kind of composition of powder substantially automatically, and it does not have the ability of dilution pernicious gas, cannot avoid the diffusion of pernicious gas, so that cause wider casualties.
Summary of the invention
Technical problem: the object of the invention is the weak point overcome in prior art, provides a kind of and can extinguish explosive flame, suppresses shock motion, dilution toxic and harmful, stops repeatedly the gas-solid two-phase jet flow initiatively back-fire relief explosion suppression device of detonation propagation.
Technical scheme: gas-solid two-phase jet flow of the present invention is back-fire relief explosion suppression device initiatively, comprises acquisition control device and fire-extinguishing explosion suppression device two large divisions; Described acquisition control device comprises two flame sensors be located on pipeline outer wall face, the collector be connected with two flame sensor output ports, the signal processor be connected with the Ethernet interface of collector, the controller that is connected with the output port of collector, and collector, signal processor are all connected with explosion-proof electrical source with the power port of controller; Described fire-extinguishing explosion suppression device comprises and is located at the ABC powder extinguishing agent stored in two storage tube cells below pipeline outer wall face, two storage tube cells, two electromagnetic valves be connected with two storage tube cell another port respectively, two reducing valve be connected with two electromagnetic valve air inlet ports respectively, two elevated pressure nitrogen sources of the gas being connected with two reducing valve air inlet ports respectively; The power port of two electromagnetic valves of described fire-extinguishing explosion suppression device is all connected with the output port of the controller of described acquisition control device.
Two described flame sensors are positioned at same level line, and spacing is 62 ~ 122m.
Interface centered by the interface at the midpoint place of two described flame sensor lines, two storage tube cells are positioned at the both sides of center interface, and the spacing of two storage tube cells is 1 ~ 2m.
Described elevated pressure nitrogen source of the gas is through the post-decompression expulsion pressure >1MPa of reducing valve.
Beneficial effect: effective range of application of the passive isolated blast establishment of exploitation is at present narrow, and be mostly disposable apparatus, but occur sometimes in colliery repeatedly to explode, now passive explosion isolation device will lose flame proof effect; And the Explosion suppressant of explosion suppression device only has a kind of composition of powder substantially automatically, it does not have the ability of dilution pernicious gas, cannot avoid the diffusion of pernicious gas, so that cause wider casualties.Instant invention overcomes these not enough, the gas-solid two-phase jet flow provided initiatively back-fire relief explosion suppression device can not only extinguish explosive flame completely, suppresses the propagation of once exploding, can also dilute toxic and harmful, stops the propagation of repeatedly exploding.When in pipeline (or tunnel), gas fuel burning or explosion time occurring, flame sensor of the present invention detects flare up fire and is converted into voltage signal and is transferred to collector, collector outputs signal controller, controller sends order-driven electromagnetic valve and opens, rear high pressure nitrogen opened by electromagnetic valve and ABC powder extinguishing agent sprays fast, high pressure gas-solid two-phase jet flow curtain is formed in pipeline (or tunnel), fully contact with flame front, the energy of a large amount of absorption flame also stops elementary reaction chain, make fray-out of flame, thus stop the propagation of flame in pipeline (or tunnel).After burning or blast are successfully suppressed, the existence of high pressure nitrogen can dilute fuel gas, make combustable gas concentration lower than the explosion ratio limit, remaining ABC powder extinguishing agent is deposited in pipeline (or tunnel) bottom, once there is secondary or repeatedly explode, when prodromal blast wave is transmitted to this region, the ABC powder extinguishing agent being deposited on pipeline (or tunnel) bottom is kicked up, Eddy diffusion in atmosphere, and fully contact with the flame front of rear arrival, make fray-out of flame, suppress subsequent explosion or repeatedly explode to continue forward direction.
Accompanying drawing explanation
Fig. 1 is apparatus structure schematic diagram of the present invention.
In figure: 1-pipeline, 2-flame sensor, 3-collector, 4-signal processor, 5-controller, 6-explosion-proof electrical source, 7-center interface, 8-stores up tube cell, 9-ABC powder extinguishing agent, 10-electromagnetic valve, 11-reducing valve, 12-elevated pressure nitrogen source of the gas, 13-flame front.
Detailed description of the invention
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
Gas-solid two-phase jet flow of the present invention is back-fire relief explosion suppression device initiatively, comprises acquisition control device and fire-extinguishing explosion suppression device two large divisions, described acquisition control device comprises two flame sensors 2 be located in pipeline 1 outside wall surface, the collector 3 be connected with two flame sensor 2 output ports, the signal processor 4 be connected with the Ethernet interface of collector 3, the controller 5 be connected with the output port of collector 3, collector 3, signal processor 4 is all connected with explosion-proof electrical source 6 with the power port of controller 5, two flame sensors 2 are positioned at same level line, spacing is 62 ~ 122m, interface 7 centered by the interface at the midpoint place of two flame sensor 2 lines, two storage tube cells 8 are positioned at the both sides of center interface 7, the spacing of two storage tube cells 8 is 1 ~ 2m, described fire-extinguishing explosion suppression device comprises ABC powder extinguishing agent 9, two electromagnetic valves 10 be connected with two storage tube cell 8 another port respectively, two reducing valve 11 be connected with two electromagnetic valve 10 air inlet ports respectively, two elevated pressure nitrogen sources of the gas 12 being connected with two reducing valve 11 air inlet ports respectively of two storage tube cells, 8, two the storage tube cells 8 li storage be located at below pipeline 1 outside wall surface, and elevated pressure nitrogen source of the gas 12 is through the post-decompression expulsion pressure >1MPa of reducing valve 11, the power port of two electromagnetic valves 10 of described fire-extinguishing explosion suppression device is all connected with the output port of the controller 5 of described acquisition control device.
When in pipeline 1, gas fuel burning or explosion time occurring, after the flame front 13 formed is detected by flame sensor 2, the flare up fire collected is transformed into voltage signal and is transferred to collector 3 by flame sensor 2, collector 3 outputs signal controller 5, controller 5 sends order-driven electromagnetic valve 10 and opens, after electromagnetic valve 10 is opened, high pressure nitrogen in elevated pressure nitrogen source of the gas 12 is through reducing valve 11, electromagnetic valve 10 sprays into pipeline 1 with storage tube cell 8 together with ABC powder extinguishing agent 9, high pressure gas-solid two-phase jet flow curtain is formed at pipeline 1 inner high voltage nitrogen and ABC powder extinguishing agent 9, knock down the flame, burning or blast is stoped to continue forward direction.After burning or blast are successfully suppressed, the existence of high pressure nitrogen can dilute fuel gas, make combustable gas concentration lower than the explosion ratio limit, remaining ABC dry powder is deposited in pipeline (or tunnel) bottom, once there is secondary or repeatedly explode, when prodromal blast wave is transmitted to this region, the ABC dry powder being deposited on pipeline (or tunnel) bottom is kicked up, Eddy diffusion in atmosphere, and fully contact with the flame front of rear arrival, make fray-out of flame, suppress secondary or repeatedly explode to continue forward direction.Gas-solid two-phase jet flow provided by the invention initiatively back-fire relief explosion-suppressing method can not only extinguish explosive flame completely, suppresses the propagation of once exploding, can also dilute toxic and harmful, stops the propagation of repeatedly exploding.
Claims (4)
1. a gas-solid two-phase jet flow initiatively back-fire relief explosion suppression device, is characterized in that: comprise acquisition control device and fire-extinguishing explosion suppression device two large divisions; Described acquisition control device comprises two flame sensors (2) be located in pipeline (1) outside wall surface, the collector (3) be connected with two flame sensor (2) output ports, the signal processor (4) be connected with the Ethernet interface of collector (3), the controller (5) that is connected with the output port of collector (3), and collector (3), signal processor (4) are all connected with explosion-proof electrical source (6) with the power port of controller (5); Described fire-extinguishing explosion suppression device comprises and is located at two storage tube cells (8) below pipeline (1) outside wall surface, the ABC powder extinguishing agent (9) of two inner storages of storage tube cell (8), two electromagnetic valves (10) be connected with two storage tube cell (8) another port respectively, two reducing valve (11) be connected with two electromagnetic valve (10) air inlet ports respectively, two elevated pressure nitrogen sources of the gas (12) being connected with two reducing valve (11) air inlet ports respectively; The power port of two electromagnetic valves (10) of described fire-extinguishing explosion suppression device is all connected with the output port of the controller (5) of described acquisition control device.
2. gas-solid two-phase jet flow according to claim 1 initiatively back-fire relief explosion suppression device, is characterized in that: two described flame sensors (2) are positioned at same level line, and spacing is 62 ~ 122m.
3. the gas-solid two-phase jet flow according to claim 1 and 2 is back-fire relief explosion suppression device initiatively, it is characterized in that: interface (7) centered by the interface at the midpoint place of two described flame sensor (2) lines, two storage tube cells (8) are positioned at the both sides of center interface (7), and the spacing of two storage tube cells (8) is 1 ~ 2m.
4. gas-solid two-phase jet flow according to claim 1 initiatively back-fire relief explosion suppression device, is characterized in that: described elevated pressure nitrogen source of the gas (12) is through the post-decompression expulsion pressure >1MPa of reducing valve (11).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410736341.5A CN104389629B (en) | 2014-12-04 | 2014-12-04 | Gas and solid jet active flame-retarding explosion-suppressing unit |
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| CN201410736341.5A CN104389629B (en) | 2014-12-04 | 2014-12-04 | Gas and solid jet active flame-retarding explosion-suppressing unit |
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| CN104389629A true CN104389629A (en) | 2015-03-04 |
| CN104389629B CN104389629B (en) | 2017-02-22 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443153A (en) * | 2015-11-23 | 2016-03-30 | 重庆安迈科技有限公司 | Nitrogen injection machine monitoring system based on internet of things |
| CN109568861A (en) * | 2018-10-26 | 2019-04-05 | 河海大学 | A kind of tunnel temperature-sensitive self-starting gas-solid two-phase jet flow fire extinguishing system |
| CN109764245A (en) * | 2019-02-19 | 2019-05-17 | 常州港华燃气有限公司 | Compound explosion suppression type natural gas line explosion-proof fire-extinguishing device |
| CN114233366A (en) * | 2021-12-06 | 2022-03-25 | 安徽理工大学 | Device for inhibiting secondary explosion of coal dust by using nitrogen dry powder |
| CN114652994A (en) * | 2022-04-22 | 2022-06-24 | 山东科技大学 | Quick-sealing explosion-proof foaming agent for coal mine tunnel, generator and sealing explosion-proof method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443153A (en) * | 2015-11-23 | 2016-03-30 | 重庆安迈科技有限公司 | Nitrogen injection machine monitoring system based on internet of things |
| CN109568861A (en) * | 2018-10-26 | 2019-04-05 | 河海大学 | A kind of tunnel temperature-sensitive self-starting gas-solid two-phase jet flow fire extinguishing system |
| CN109764245A (en) * | 2019-02-19 | 2019-05-17 | 常州港华燃气有限公司 | Compound explosion suppression type natural gas line explosion-proof fire-extinguishing device |
| CN114233366A (en) * | 2021-12-06 | 2022-03-25 | 安徽理工大学 | Device for inhibiting secondary explosion of coal dust by using nitrogen dry powder |
| CN114652994A (en) * | 2022-04-22 | 2022-06-24 | 山东科技大学 | Quick-sealing explosion-proof foaming agent for coal mine tunnel, generator and sealing explosion-proof method |
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| CN104389629B (en) | 2017-02-22 |
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