CN108345734A - A kind of explosion limit computational methods of mixed combustible gas body - Google Patents
A kind of explosion limit computational methods of mixed combustible gas body Download PDFInfo
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Abstract
The invention discloses a kind of explosion limit computational methods of mixed combustible gas body, it is related to Chemical Manufacture and mine gas explosion Control Technology field, reason trie explosion limit calculation formula is looked into for the first time to use in a manner of calculation procedure, propose a kind of prediction technique of multicomponent mixed combustible gas body explosion limit extreme value, explosion limit is calculated in an adaptive way simultaneously, the explosion limit of mixed gas can be calculated in the case where only determining specific gaseous species, and the volume fraction of each component gas under this explosion limit can be found, guidance is provided for explosion suppression in industrial production.
Description
Technical field
The present invention relates to Chemical Manufactures and mine gas explosion Control Technology field, more particularly to one kind mainly by organic
The explosion limit computational methods for the mixed combustible gas body that hydrocarbon gas is constituted.
Background technology
Combustion explosion obtains a kind of important way of energy as the mankind, if in uncontrolled time, space environment
Lower generation, can bring huge life and property loss.The generation of flammable gas explosion disaster, mainly due to combustible gas
After the Gas Outburst of body leakage or coal mine, the burning mixture of suitable concentration is formed after being mixed with air, is ignited by an ignition source,
Caused by gradually forming turbulent combustion, detonation even detonation.Under normal circumstances, the pipeline for transporting fuel gas be it is safe,
Because being all pure gas in the flammable explosive gas that pipe network is conveyed, oxygen or other oxidants are not adulterated.But it is building
Construction wrong, earthquake is long neglected and in disrepair or other are unpredictalbe in special circumstances, and grid is caused to rupture and impaired.In low pressure
It is possible to reduce in rupture and impaired local pressure in the case of transmission combustion gas, causes outside air to enter grid, under making
Combustion gas in play pipe net becomes the premix gas with air.When the premix gas reaches explosion limit, just tempering and explosion is given to create
Necessary condition.Once encounter open fire, lightning stroke or other situations caused by burning condition when, just will produce flame or explosion, draw
Send out safety accident serious.
In order to reduce the probability of happening of Mixed Gases Explosion, carrying out relevant explosion-proof, datonation-inhibition work is necessary,
It is not that can occur under any concentration that explosion, which occurs, for burning mixture, one after fuel gas is mixed with air
Incendiary source is met when determining concentration could occur explosive reaction, and the no generation explosive reaction of mixed combustible gas physical efficiency needs comparison two important
Parameter, that is, lower explosion limit and upper explosion limit, the concentration of entire burning mixture is between Mixed Gases Explosion Upper-lower Limit
Incendiary source is met when interior to explode, and the concentration for controlling mixed gas is the important link for blocking fuel gas to explode.
Occur now burning mixture explosion, most of mixed gas be all due to the organic combustible gas such as hydro carbons constitute, so
It is very urgent to find a kind of method that can quickly calculate such Mixed Gases Explosion limit.
For one group of mixed gas when calculating whole explosion limit, the volume fraction of each gas is to the quick-fried of entire mixed gas
The fried limit is all influential, and the explosion limit of currently the majority common gas has all been measured, me is not needed
Go independent measurement again, such as methane (CH4) upper explosion limit 15%, lower explosion limit 5%, the determination of burning mixture explosion limit
For entire explosion-proof, datonation-inhibition with important directive significance, at the same time really for entire mixed combustible gas body explosion limit
It is fixed also to achieve fairly perfect theory.
In the prior art, the numerical value determination of burning mixture explosion Upper-lower Limit mainly has following two categories method：
The first kind：Required burning mixture explosion limit is obtained by testing
Second class：The explosion limit of Diversity gas is predicted by theoretical prediction model
Such method includes mainly three kinds of common methods：The first is that Li-looks into trie empirical equation or it improves formula：It answers
Explosion limit for calculating the complicated combustible gas mixture of composition, the formula are suitable for not reacting between each component, burn
When the combustible gas mixture without catalytic action explosion limit calculating, meter of the formula especially to organic hydrocarbon mixed gas
Calculate accuracy higher：
In formula, LmThe Mixed Gases Explosion limit, %；
L1、L2、L3、LnThe explosion limit of each component, % in mixed gas；
V1、V2、V3、VnVolume fraction of each component in mixed gas, %.
Second is constant adiabatic flame temperature method：By observing constant thermal insulation possessed by alkane at explosion limit
Flame temperature realizes the prediction of explosion limit；
The third is volumetric concentration empirical formula method：It is quick-fried to mixed gas by taking linearly or nonlinearly homing method
Fried inherent quantitative relationship between the limit and each component concentration carries out statistical learning, relevant empirical equation is obtained, to realize
The function of the Mixed Gases Explosion limit is predicted by the volumetric concentration of each component.
The shortcomings of the prior art is：
The method that the first kind finds explosion limit, the method is using less in actual production, mainly due to experiment week
Phase is longer, costly and do not have wide applicability.And due to the experimental facilities and method of different experiments personnel use
Difference causes the data actually obtained to there is very big difference.
Li-in second class looks into trie empirical equation or it improves formula to calculating method and can only calculate in burning mixture
The explosion limit of burning mixture after the volume fraction determination of each gas, thus it is relatively complicated, using inconvenience；It is constant exhausted
Thermal-flame temperature method is equally also relatively complicated, needs to rely on special-purpose software, and this method is typically limited to only the pre- of lower explosion limit
It surveys；Volumetric concentration empirical formula method is very big to the degree of dependence of each component concentration, and this method is only applicable to modeling when institute
The specific components admixture of gas of selection can not then predict nonspecific mixed gas.
The volume fraction of mixed gas constantly changes in process of production in a production process, and given according to one group
The explosion limit calculated of volume fraction of each component cannot react the explosion limit of whole mixed gas.Therefore reason-
It looks into trie empirical equation or it improves the Mixed Gases Explosion limit that formula and volumetric concentration empirical formula method are predicted to reality
The explosion suppression of border production cannot play real-time directive function.Current still none of these methods can not learn mixing in advance
The method for predicting the explosion limit of mixed gas in gas under the premise of each component concentration.
Invention content
An embodiment of the present invention provides a kind of explosion limit computational methods of mixed combustible gas body, can solve the prior art
The problem of.
The present invention provides a kind of explosion limit computational methods of mixed combustible gas body, and this approach includes the following steps：
The type of gas in mixed gas is inputted in host computer, the volume fraction of each gas is given tacit consent to 0%-99.9%'s
Value in range；
Prestored in host computer it is reasonable-look into the calculation procedure of trie explosion limit, input described upper after gaseous species
Machine calls calculation procedure to calculate the explosion bound of mixed gas, and the volume fraction of each gas is in value model when calculating
It is taken in enclosing all over all values；
After multigroup explosion bound is calculated, maximum value and minimum value therein are taken, together with the acquirement maximum value and most
The volume fraction of each gas is shown together when small value.
Preferably, value of the host computer when calculating in the value range of each gas is after retaining decimal point
One.
Preferably, the explosion bound of each gas calls the data pre-entered can be obtained.
Preferably, if having input volume fraction range of certain gas in mixed gas, the host computer is at this
Value in the volume fraction range of input.
A kind of explosion limit computational methods of mixed combustible gas body in the embodiment of the present invention, have the following advantages：
1, Li-is looked into trie explosion limit calculation formula for the first time and calculates explosion limit in a manner of programming；
2, be put forward for the first time the concept of adaptive explosion limit, i.e., it only need to be defeated by contained gaseous species in required mixed combustible gas
Enter and can complete to calculate by computer self, obtains the Mixed Gases Explosion limit, calculated explosion limit is just called at this time
Adaptive explosion limit；
3, it can accomplish that contained gaseous species can find out the Mixed Gases Explosion limit in only understanding mixed gas for the first time,
And it can determine that the volume fraction of various gases under this explosion limit.
Specific implementation mode
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
The every other embodiment that technical staff is obtained without making creative work belongs to the model that the present invention protects
It encloses.
A kind of explosion limit computational methods of the mixed combustible gas body provided in the embodiment of the present invention, this method include following
Step, the explosion limit that this method is particularly suitable for the mixed gas of organic hydrocarbon gas composition calculate：
Step 1 inputs the type of gas in mixed gas in host computer, and chooses whether to input certain gas as needed
Volume fraction range of the body in mixed gas, such as 10%-30%, the body of each gas if not inputting volume fraction
Fraction acquiescence value in the range of 0%-99.9%, and value is reservation one decimal place；
Step 2, prestore in host computer it is reasonable-look into the calculation procedure of trie explosion limit, input institute after gaseous species
Stating host computer calls calculation procedure to calculate the explosion bound of mixed gas, when calculating various gases volume fraction it
Be 100%, and the volume fraction of each gas is taken in value range all over all values, the explosion bound of each gas can be with
Call the data pre-entered；
Step 3 after multigroup explosion bound is calculated, takes maximum value and minimum value therein, i.e., mixed gas is quick-fried
Fried bound maximum value and minimum value, are shown together together with the volume fraction of each gas when obtaining the maximum value and minimum value
Show.
Above-mentioned calculation procedure is programmed according to following formula and is obtained：
The type of method gas in just knowing that mixed gas of the present invention is without knowing that the concrete component of various gases is dense
When spending, the explosion limit of mixed gas can be calculated in real time by adaptive method, computational methods are simple and fast, are suitable for
The explosion limit of various burning mixtures calculates, this method especially accurate for the mixed gas result of calculation of organic hydrocarbon
Can in dynamic monitoring Chemical Manufacture mixed gas state, provide timely and effectively data support for explosion suppression.
It should be understood by those skilled in the art that, the embodiment of the present invention can be provided as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, the present invention can be used in one or more wherein include computer usable program code computer
The computer program production implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
The present invention be with reference to according to the method for the embodiment of the present invention, the flow of equipment (system) and computer program product
Come what is described.It should be understood that the combination for each flow and flow that can be realized by computer program instructions in flow.This can be provided
A little computer program instructions are to all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices
Processor to generate a machine so that pass through the finger that computer or the processor of other programmable data processing devices execute
Enable the device generated for realizing the function of being specified in a flow or multiple flows.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to
The manufacture of device is enabled, which realizes the function of being specified in a flow or multiple flows.
These computer program instructions also can be loaded onto a computer or other programmable data processing device so that count
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, in computer or
The instruction executed on other programmable devices provides the step of for realizing the function of being specified in a flow or multiple flows.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (4)
1. a kind of explosion limit computational methods of mixed combustible gas body, which is characterized in that this approach includes the following steps：
The type of gas in mixed gas is inputted in host computer, the volume fraction of each gas gives tacit consent to the range in 0%-99.9%
Interior value；
Prestored in host computer it is reasonable-look into the calculation procedure of trie explosion limit, input the host computer tune after gaseous species
The explosion bound of mixed gas is calculated with calculation procedure, the volume fraction of each gas is in value range when calculating
It takes all over all values；
After multigroup explosion bound is calculated, maximum value and minimum value therein are taken, together with the acquirement maximum value and minimum value
When each gas volume fraction shown together.
2. the explosion limit computational methods of mixed combustible gas body as described in claim 1, which is characterized in that the host computer exists
Value when calculating in the value range of each gas is reservation one decimal place.
3. the explosion limit computational methods of mixed combustible gas body as described in claim 1, which is characterized in that each gas it is quick-fried
Fried bound calls the data pre-entered can be obtained.
4. the explosion limit computational methods of mixed combustible gas body as described in claim 1, which is characterized in that if having input certain
Volume fraction range of the gas in mixed gas is planted, then host computer value in the volume fraction range of the input.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109596803A (en) * | 2018-12-09 | 2019-04-09 | 西安科技大学 | The principal component Multiple Regression Analysis Method of methane explosion minimum oxygen concentration Intrusion Index |
| CN109884258A (en) * | 2019-04-08 | 2019-06-14 | 北京环境特性研究所 | The monitoring method and device of mixed combustible gas body |
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| CN105158164A (en) * | 2015-07-26 | 2015-12-16 | 北京航星网讯技术股份有限公司 | Method for detecting oil-gas concentration of oil tank with passive laser |
| CN106703887A (en) * | 2016-11-24 | 2017-05-24 | 西安科技大学 | Method of judging secondary gas explosion in mine thermodynamic disaster relief |
| CN107301495A (en) * | 2017-05-24 | 2017-10-27 | 天津大学 | A kind of appraisal procedure of organic rankine cycle system mixed working fluid leakage security |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109596803A (en) * | 2018-12-09 | 2019-04-09 | 西安科技大学 | The principal component Multiple Regression Analysis Method of methane explosion minimum oxygen concentration Intrusion Index |
| CN109596803B (en) * | 2018-12-09 | 2019-08-27 | 西安科技大学 | The principal component Multiple Regression Analysis Method of methane explosion minimum oxygen concentration Intrusion Index |
| CN109884258A (en) * | 2019-04-08 | 2019-06-14 | 北京环境特性研究所 | The monitoring method and device of mixed combustible gas body |
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| CN108345734B (en) | 2019-10-15 |
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