CN105588870B - A kind of coal-field fire detection device and method based on sulfur isotope component ratio - Google Patents
A kind of coal-field fire detection device and method based on sulfur isotope component ratio Download PDFInfo
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Abstract
A kind of coal-field fire detection device and method based on sulfur isotope component ratio, device include：Air exhaust rod, soft air-guide pipe, pumping inflating pump, drying cylinder, collection airbag, isotope mass spectrometer.The present invention extracts gas in shallow layer surface by the air exhaust rod of insertion earth's surface, gas is delivered to pumping inflating pump through soft air-guide pipe, pumping inflating pump extrudes gas and enters drying cylinder drying by soft air-guide pipe, gas after drying cylinder drying imports collection airbag through soft air-guide pipe, collect gas in airbag and analyzes the isotope composition ratio for calculating sulphur through isotope mass spectrometer, by being compared with sulfur isotope component ratio in raw coal, whether spontaneous combustion of coal seam is occurred below judgement measuring point, and comprehensive each measuring point information achievees the purpose that draw a circle to approve coal-field fire in turn.Its is simple in structure, easy to operate, use cost is low.
Description
Technical field
The present invention relates to a kind of coal-field fire detection devices and method based on sulfur isotope component ratio, belong to coalfield safety
Field is particularly suitable for cranny development coal-field fire.
Background technology
Coal is Chinese main energy sources now and in significant period of time from now on.But the coal resources of China are always
It is deep to be threatened by spontaneous combustion, it saves (autonomous region) in Xinjiang of China, the Inner Mongol, Shanxi, Ningxia, Gansu, Qinghai etc. and exists largely
Coal-field fire.The data shows that China's mine more than half has spontaneous combustion area or has spontaneous fire danger area.Freely burning fire
Safety of Coal Mine Production is not only seriously affected and threaten, while freezing a large amount of coal resources.According to the preliminary statistics, certainly due to coal
Fat coal loss amount caused by combustion is now still increased with the speed of 2000~30,000,000 t/a up to 4,200,000,000 t or more, and is affected by it
Caused by dull resource reserve be more than 200,000,000 t/a, it is the indirect loss thereby resulted in, such as land resource, atmosphere pollution, naturally raw
State environment and humanity activities etc. by influenced be even more be difficult to estimate.Therefore the Chinese government in Agenda 21 by coal from
Combustion is classified as one of major natural disasters type.
The premise that coal-field fire is administered is to find the position of combustion zone accurately, and then formulate scheme of targetedly putting out a fire, and is put out
Coal-field fire.If coal-field fire position cannot precisely be drawn a circle to approve, extinguishing effect is not only not achieved, peace can be also brought to fire-fighting work
Full hidden danger.It is presently used for determining that the detection method of coal-field fire mainly has remote sensing, earth's surface thermometry, probing method, electrical method, magnetic method
With survey radon method.Various methods respectively have advantage and disadvantage.Remote sensing technique is suitble to draw a circle to approve the coal-field fire of large area, but acquired information is
Earth's surface information can not effectively detect underground coal fire, and there are problems that lack of resolution；Earth's surface thermometric reaction speed
Soon, temperature-measuring range is big, but heavy workload, and the consuming time is long, and thermometric work is carried out above flame range has danger.And buried depth
30m or less coal-field fires may be showed in earth's surface without heat anomaly；Drilling method is by after flame range construction drill, according to drilling
The height of temperature differentiates distribution and the development degree of flame range；This method is a kind of most straightforward approach, but leading due to coal petrography
It is hot poor, to realize the relatively accurate detection of flame range, need in the intensive construction drill of entire detecting area (general pitch-row is less than 10m),
Its heavy workload, of high cost, not easy-to-use the method completes the task of large area flame range detection；Electrical method is with magnetic method because spuious by the earth
The multifactor interference such as electric current, magnetic field, mountain area complicated landform so that the data interpretation of multi-solution is extremely difficult, and magnetic method passes through
The thermoremanent magnetism that flame range burnt rock generates is detected to draw a circle to approve flame range boundary, but the burnt rock generally ability only after temperature is higher than 400 DEG C
Notable thermoremanent magnetism can be generated, therefore, magnetic cannot be satisfied the detection requirement of 400 DEG C of following region.
Survey distribution situation of the radon method by the detection differentiation coal-field fire to detecting area radon element, it is believed that the concentration of radon element
Bigger flame range development degree is more serious, but since radon element is present in the country rock of coal seam, not the direct product of coal combustion,
So the Shortcomings in the delineation of coal-field fire.
According to the Characteristics of The Sulfur Isotopic Composition of CHINESE COAL and coal-fired process Sulfur Isotope Fractionation result of study, although showing not
Sulfur content with area coal seam has a long way to go, but in coal combustion process, it may appear that the isotope fractionation phenomenon of sulphur, i.e. coal are fired
Burning releases in gas in sulfur isotope composition, and opposite raw coal has gently34The phenomenon that S, such phenomenon are by sulfur isotope point
It evaporates phenomenon detection coal-field fire and provides theoretical foundation.Relative to survey radon method, SO2Product is directly generated for coal combustion, for
Detection coal-field fire has more advantage.And according to studies have shown that in combustion gas,34S/32S component ratios are less than in coal sample34S/324 ‰ or more S component ratios.
Invention content
Technical problem：The purpose of the present invention is overcoming existing methods insufficient, provide a kind of features simple structure, it is easy to operate,
Use cost low coal-field fire detection device and method.
Technical solution：The coal-field fire detection device based on sulfur isotope component ratio of the present invention, including isotope mass spectrometry
Pumping inflating pump, the drying cylinder sum aggregate airbag that instrument further includes air exhaust rod, is sequentially connected with soft air-guide pipe and air exhaust rod tail portion, collection
The analysis that gas in airbag carries out sulfur isotope component by isotope mass spectrometer calculates and exports result；
The air exhaust rod includes the hollow cylinder body of rod and solid cone head, the hollow cylinder body of rod and solid cone
It is provided with multiple annular grooves on the body of rod of head junction, multiple aspirating holes are provided in each annular groove；The hollow cylinder body of rod
There are gas outlets for tail portion.
Multiple annular grooves are 2-4, and the multiple aspirating holes opened up in each annular groove are four, symmetrically
Arrangement.
Using the coal-field fire detection method based on sulfur isotope component ratio of above-mentioned apparatus, include the following steps：
A. it is sampled to producing coal within continuous five days, once a day, five parts of coal samples are uniformly mixed by each 1000g
Sample preparation afterwards measures total sulfur in coal sample using isotope mass spectrometer34S/32S content ratios；
B. it is waited in production zone in coalfield, according to 20m × 20m grid divisions, grid node is determined as measuring point；
C. air exhaust rod is inserted at measuring point, it is about 700mm to be inserted into earth's surface depth；
D. it is inserted into after air exhaust rod, earth's surface near air exhaust rod is sealed, then connect soft air-guide pipe and pumping inflating pump；
E. pumping inflating pump is opened, after pump work 1 minute, airbag will be collected, pumping inflating pump is accessed by soft air-guide pipe
Gas outlet, airbag to be collected are full of, and are closed gas collection sack and are numbered；
F. step c, d, e are repeated, completes the pumping work of all measuring points in order；
G. it is measured respectively in each measuring point collection airbag in gas using isotope mass spectrometer34S/32S content ratios, and respectively with
In step a in surveyed coal sample34S/32S content ratio results are compared, when in certain measuring point gas34S/32S content ratios are less than coal
In sample34S/32When S content ratios 4 ‰, you can assert below the measuring point there is burning flame range.
Advantageous effect：By adopting the above-described technical solution, the present invention is according in coal combustion process, it may appear that the same position of sulphur
Element fractionation phenomenon, i.e., in the gas that coal combustion releases in sulfur isotope composition, coal relatively used has enrichment32S light isotopes
The phenomenon that, because containing element sulphur in all coal seams, wherein element sulphur is that coal combustion directly generates product, compared to side radon
Method, accuracy higher.In addition, the present invention can make up ground based IR thermometric and remote detecting method in investigation depth not
Foot completes the detection mission of deeper coal-field fire.It is detected compared to electrical method, magnetic method, the present apparatus is simple in structure, easy to operate, can
Remove the puzzlement for arranging a large amount of surveys line from, and due to being not necessarily to high voltage and electric current, improves the safety in detection process.It is comprehensive
Upper described, the present apparatus has more advantage with method for detection coal-field fire.
Description of the drawings
Fig. 1 is the coal-field fire detection device structural schematic diagram based on sulfur isotope component ratio.
In figure：Air exhaust rod 1, soft air-guide pipe 2, pumping inflating pump 3, drying cylinder 4, collection airbag 5, isotope mass spectrometer 6.
Specific implementation mode
The invention will be further described for embodiment in below in conjunction with the accompanying drawings：
The coal-field fire detection device based on sulfur isotope component ratio of the present invention, including isotope mass spectrometer 6, air exhaust rod
1, pumping inflating pump 3, the 4 sum aggregate airbag 5 of drying cylinder being sequentially connected with soft air-guide pipe 2 and 1 tail portion of air exhaust rod collects in airbag 5
The analysis that gas carries out sulfur isotope component by isotope mass spectrometer 6 calculates and exports result；
The air exhaust rod 1 includes the hollow cylinder body of rod and solid cone head, the hollow cylinder body of rod and solid circular cone
It is provided with multiple annular grooves on the body of rod of body head junction, multiple aspirating holes are provided in each annular groove；Open circles mast
There are gas outlets for body tail portion.Multiple annular grooves are 2-4, and the multiple aspirating holes opened up in each annular groove are
It four, is arranged symmetrically.
The air exhaust rod is made of the hollow cylinder on top and the solid cone of bottom end, and preferable cylinder head factory is
750mm, the long 100mm of cone, hollow cylinder outer diameter 45mm, thickness 10mm；Cylinder bottom nearby has close to cone
Diameter is less than the groove on top, preferable groove hollow cylinder outer diameter 35mm, thickness 10mm, long 15mm at three；Each
Circular groove surrounding is arranged symmetrically four aspirating holes, the preferable a diameter of 10mm of aspirating hole；There are gas outlets for column top, can be excellent
Select a diameter of 20mm of mouth.The air exhaust rod is connected through soft air-guide pipe with pumping inflating pump, and pumping inflating pump is soft by air guide
Pipe is connected with drying cylinder, and drying cylinder is connected by soft air-guide pipe with collection airbag, collects gas in airbag and is carried out by isotope mass spectrometer
The analysis of sulfur isotope component calculates and exports result.
The coal-field fire detection method based on sulfur isotope component ratio of the present invention, is as follows：
A. it is sampled to producing coal within continuous five days, once a day, five parts of coal samples are uniformly mixed by each 1000g
Sample preparation afterwards measures total sulfur in coal sample using isotope mass spectrometer34S/32S content ratios；
B. it is waited in production zone in coalfield, according to 20m × 20m grid divisions, grid node is determined as measuring point；
C. air exhaust rod 1 is inserted at measuring point, it is about 700mm to be inserted into earth's surface depth；
D. it is inserted into after air exhaust rod 1, earth's surface near air exhaust rod is sealed, then connect soft air-guide pipe 2 and pumping inflating pump
3；
E. pumping inflating pump 3 is opened, after pump work 1 minute, collection airbag 5 is inflated by the access pumping of soft air-guide pipe 2
The gas outlet of pump 3, airbag 5 to be collected are full of, and are closed gas collection sack and are numbered；
F. step c, d, e are repeated, completes the pumping work of all measuring points in order；
G. it is measured respectively in each measuring point collection airbag in gas using isotope mass spectrometer34S/32S content ratios, and respectively with
In step a in surveyed coal sample34S/32S content ratio results are compared, when in certain measuring point gas34S/32S content ratios are less than coal
In sample34S/32When S content ratios 4 ‰, you can assert below the measuring point there is burning flame range.Comprehensive each measuring point information reaches in turn
To delineation coal-field fire.
Claims (1)
1. a kind of coal-field fire detection method based on sulfur isotope component ratio, including coal-field fire detection device is used, it is described
Coal-field fire detection device includes：Isotope mass spectrometer（6）, air exhaust rod（1）, use soft air-guide pipe（2）With air exhaust rod（1）Tail portion according to
Secondary connected pumping inflating pump（3）, drying cylinder（4）Sum aggregate airbag（5）, the air exhaust rod (1) through soft air-guide pipe (2) with pumping beat
Air pump（3）Be connected, pumping inflating pump (3) is connected by soft air-guide pipe with drying cylinder (4), drying cylinder (4) by soft air-guide pipe and
Collect airbag (5) to be connected, collects airbag（5）In gas pass through isotope mass spectrometer（6）The analysis for carrying out sulfur isotope component calculates
And export result；The air exhaust rod（1）Including the hollow cylinder body of rod and solid cone head, the hollow cylinder body of rod with it is solid
It is provided with multiple annular grooves on the body of rod of cone head junction, multiple aspirating holes are provided in each annular groove；Open circles
There are gas outlets for mast body tail portion；Multiple annular grooves are 2-4, the multiple pumpings opened up in each annular groove
It Kong Weisi, is arranged symmetrically；It is characterized in that, coal-field fire detection method includes the following steps：
A. it is sampled to producing coal within continuous five days, once a day, each 1000g makes five parts of coal samples after mixing
Sample measures total sulfur in coal sample using isotope mass spectrometer34S/32S content ratios；
B. it is waited in production zone in coalfield, according to 20m × 20m grid divisions, grid node is determined as measuring point；
C. air exhaust rod is inserted at measuring point（1）, insertion earth's surface depth is 700mm；
D. it is inserted into air exhaust rod（1）Later, earth's surface near air exhaust rod is sealed, then connects soft air-guide pipe（2）With pumping inflating pump
（3）；
E. pumping inflating pump is opened（3）, after pump work 1 minute, airbag will be collected（5）Pass through soft air-guide pipe（2）Access pumping is beaten
Air pump（3）Gas outlet, airbag to be collected（5）It is full of, closes gas collection sack and numbers；
F. step c, d, e are repeated, completes the pumping work of all measuring points in order；
G. it is measured respectively in each measuring point collection airbag in gas using isotope mass spectrometer34S/32S content ratios, and respectively with step a
In middle surveyed coal sample34S/32S content ratio results are compared, when in certain measuring point gas34S/32S content ratios are less than coal sample
In34S/32When S content ratios 4 ‰, you can assert below the measuring point there is burning flame range.
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| CN106812525B (en) * | 2016-11-28 | 2019-05-21 | 中国矿业大学 | A kind of goaf source CO discrimination method based on oxygen isotope detection |
| CN111366686B (en) * | 2020-03-31 | 2022-09-27 | 湖南科技大学 | Method for judging coal mine spontaneous combustion area based on detection of C14 radioactive quantity |
| CN113047906B (en) * | 2021-03-08 | 2022-01-25 | 中国矿业大学 | Spontaneous combustion target positioning method for coal in goaf |
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