CN108345734B - A kind of explosion limit calculation method of mixed combustible gas body - Google Patents
A kind of explosion limit calculation method of mixed combustible gas body Download PDFInfo
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Abstract
The invention discloses a kind of explosion limit calculation methods of mixed combustible gas body, it is related to Chemical Manufacture and mine gas explosion Control Technology field, Li-Cha Teli explosion limit calculation formula is used in a manner of calculation procedure for the first time, propose a kind of prediction technique of multicomponent mixed combustible gas body explosion limit extreme value, calculate explosion limit 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 calculation method for the mixed combustible gas body that hydrocarbon gas is constituted.
Background technique
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 mixing with air, is ignited by an ignition source,
Caused by gradually forming turbulent combustion, detonation even detonation.Under normal circumstances, transport the pipeline of 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 where 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 created to tempering and explosion
Necessary condition.Once encounter open fire, lightning stroke or other situations caused by burning condition when, flame or explosion will be generated, drawn
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 mixes with air
Incendiary source is met when determining concentration could occur explosive reaction, the no generation explosive reaction of mixed combustible gas physical efficiency need to compare two it is 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
The method that such Mixed Gases Explosion limit can quickly be calculated by finding one kind is very urgent.
For one group of mixed gas when calculating whole explosion limit, the volume fraction of every kind of gas is to the quick-fried of entire mixed gas
The fried limit is all influential, and the explosion limit of most of common gas has all been measured now, does not need me
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: burning mixture explosion limit needed for being obtained by test
Second class: it is predicted by explosion limit of the theoretical prediction model to Diversity gas
Such method mainly includes three kinds of common methods: the first is Li-Cha Teli empirical equation or it improves formula: being answered
For calculating the explosion limit of the combustible gas mixture of complicated composition, which is suitable for not reacting between each component, burns
When the combustible gas mixture without catalytic action explosion limit calculating, meter of the formula especially to organic hydrocarbon mixed gas
It is higher to calculate accuracy:
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 insulation possessed by alkane at explosion limit
Flame temperature realizes the prediction of explosion limit；
The third is volumetric concentration empirical formula method: quick-fried to mixed gas by taking linearly or nonlinearly homing method
Inherent quantitative relationship between the fried 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 applied less in actual production, mainly due to test 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, leading to the data actually obtained, there are great differences.
Li-Cha Teli empirical equation or its improvement formula to calculating method in second class can only calculate in burning mixture
The explosion limit of burning mixture after the volume fraction of every kind of gas is determining, 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 in advance mixing
The method of the explosion limit of mixed gas is predicted in gas under the premise of each component concentration.
Summary of the invention
The embodiment of the invention provides a kind of explosion limit calculation methods of mixed combustible gas body, can solve the prior art
The problem of.
The present invention provides a kind of explosion limit calculation methods of mixed combustible gas body, method includes the following steps:
The type of gas, the volume fraction of every kind of gas are defaulted 0%-99.9%'s in host computer input mixed gas
Value in range；
It is stored in advance the calculation procedure of reasonable-Cha Teli explosion limit in host computer, inputs described upper after gaseous species
Machine calls calculation procedure to calculate the explosion bound of mixed gas, and the volume fraction of every kind of gas is in value model when calculating
It is taken in enclosing all over all values；
After multiple groups explosion bound is calculated, maximum value and minimum value therein are taken, together with the acquirement maximum value and most
The volume fraction of every kind of gas is shown together when small value.
Preferably, the host computer is when calculating after the value in the value range of every kind of gas is to retain decimal point
One.
Preferably, the explosion bound of every kind of 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.
The explosion limit calculation method of one of embodiment of the present invention mixed combustible gas body, has the advantage that
1, Li-Cha Teli explosion limit calculation formula is calculated into explosion limit in a manner of programming for the first time；
2, be put forward for the first time the concept of adaptive explosion limit, i.e., it only need to be defeated by gaseous species contained in required mixed combustible gas
Entering can be completed to calculate by computer self, obtain the Mixed Gases Explosion limit, calculated explosion limit is just called at this time
Adaptive explosion limit；
3, can accomplish only understanding that contained gaseous species can find out the Mixed Gases Explosion limit in mixed gas for the first time,
And it can determine that the volume fraction of various gases under this explosion limit.
Specific embodiment
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
Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
A kind of explosion limit calculation method 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, the type of gas in host computer input mixed gas, and choose whether to input certain gas as needed
Volume fraction range of the body in mixed gas, such as 10%-30%, the body of every kind of gas if not inputting volume fraction
Fraction default value in the range of 0%-99.9%, and value is reservation one decimal place；
The calculation procedure of reasonable-Cha Teli explosion limit is stored in advance in host computer for step 2, inputs 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 every kind of gas is taken in value range all over all values, and the explosion bound of every kind of gas can be with
Call the data pre-entered；
Step 3 takes maximum value and minimum value therein, i.e., mixed gas is quick-fried after multiple groups explosion bound is calculated
Fried bound maximum value and minimum value, are shown together together with the volume fraction of every kind of gas when obtaining the maximum value and minimum value
Show.
I.e. programming obtains above-mentioned calculation procedure according to the following formula:
The type of the method for the invention gas in just knowing that mixed gas is dense without the concrete component for knowing various gases
When spending, the explosion limit of mixed gas can be calculated in real time by adaptive method, calculation method is simple and fast, is suitable for
The explosion limit of various burning mixtures calculates, this method especially accurate for the mixed gas calculated result 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 provide 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, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Come what is described.It should be understood that the combination for each process and process that can be realized by computer program instructions in process.It can provide this
A little computer program instructions are to general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices
Processor to generate a machine so that the finger executed by the processor of computer or other programmable data processing devices
Enable the device generated for realizing the function of specifying in a process or multiple processes.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
The manufacture of device is enabled, which realizes the function of specifying in a process or multiple processes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices provides the step of for realizing the function of specifying in a process or multiple processes.
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
Mind 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 (3)
1. a kind of explosion limit calculation method of mixed combustible gas body, which is characterized in that method includes the following steps:
The type of gas, the volume fraction of every kind of gas default the range in 0%-99.9% in host computer input mixed gas
Interior value；
The calculation procedure of reasonable-Cha Teli explosion limit is stored in advance in host computer, inputs the host computer tune after gaseous species
It is calculated with explosion bound of the calculation procedure to mixed gas, the volume fraction of every kind of gas is in value range when calculating
It takes all over all values, value of the host computer when calculating in the value range of every kind of gas is that reservation decimal point is latter
Position；
After multiple groups explosion bound is calculated, maximum value and minimum value therein are taken, together with the acquirement maximum value and minimum value
When every kind of gas volume fraction shown together；
The explosion pole of mixed gas can be calculated in real time when the type of gas in just knowing that mixed gas using the above method
Limit provides timely and effectively data support with the state of mixed gas in dynamic monitoring Chemical Manufacture for explosion suppression.
2. the explosion limit calculation method of mixed combustible gas body as described in claim 1, which is characterized in that every kind of gas it is quick-fried
Fried bound calls the data pre-entered can be obtained.
3. the explosion limit calculation method 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN114459561A (en) * | 2020-11-10 | 2022-05-10 | 中国石油天然气股份有限公司 | Air volume measuring and calculating method and early warning method for near explosion of combustible mixed gas |
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