CN108896611A - Determining coal ignitability device and measuring method - Google Patents
Determining coal ignitability device and measuring method Download PDFInfo
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- CN108896611A CN108896611A CN201810967364.5A CN201810967364A CN108896611A CN 108896611 A CN108896611 A CN 108896611A CN 201810967364 A CN201810967364 A CN 201810967364A CN 108896611 A CN108896611 A CN 108896611A
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
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Abstract
The present invention provides a kind of determining coal ignitability devices and measuring method, measurement device to include：Outer layer main box, coal bin, coal sample tank and signal receive analysis system；Oil inlet is provided on the side wall of outer layer main box, fuel outlet and valve, outer layer main box top cover is equipped with main box cover board, coal bin is arranged in outer layer main box, coal bin top cover is equipped with coal bin cover board, air inlet pipe is provided on coal bin side wall, air inlet pipe runs through the side wall of outer layer main box, and it is connected to air compressor, gas flow controller is additionally provided in air inlet pipe, coal sample tank is arranged in coal bin, its bottom is netted, exhaust pipe is provided on coal bin cover board, electromagnetic radiation tester and thermocouple, one end of thermocouple extends in coal sample tank, the other end of thermocouple is connected to temperature controller, in outer layer main box, and it is located at below coal bin and is provided with electric furnace heating wire, electric furnace heating wire is connected to temperature controller, it includes host that signal, which receives analysis system, host is connected to electromagnetic radiation tester.
Description
Technical field
The present invention relates to coal body spontaneous combustion Prevention Technique fields, fill in particular to a kind of determining coal ignitability
It sets and a kind of method for determining coal ignitability.
Background technique
Coal spontaneous combustion harm can not only cause serious social danger and environmental pollution, and cause the huge of coal resources
Loss.In progress of coal mining, most mine fire be since the spontaneous combustion of coal causes, it is serious may induce gas,
The accidents such as coal-dust explosion.Therefore, research method for determining coal ignitability has preventing and extinguishing fire of coal mine work of crucial importance
Meaning.
Currently, external method for determining coal ignitability mainly has adiabatic oxygenation method（The U.S., Australia）, high temperature
Activation energy method（Poland）, crossing point temperature method（India, Turkey）Deng domestic measuring method mainly foundation national standard
Oxygen absorbed and crossing point temperature during the temperature programmed oxidation that chromatograph with oxygen adsorption identification method and recommendation execute are the measurement of index
Method.Wherein, the external adiabatic oxygenation method test condition used is harsh, and high-temperature activation energy method, crossing point temperature method reflection are
Coal is at relatively high temperatures（Typically larger than 140 DEG C）Oxidation and spontaneous combustion characteristic, fail reflect the low-temperature oxidation stage oxidation and spontaneous combustion mistake
Journey；And the domestic method used has the following disadvantages：The characteristic of oxygen adsorption with chromatograph measurement coal physical absorption oxygen, and the absorption of coal
Characteristic is related with its surface nature, hole construction, this is difficult to reflect the autothermal oxidation characteristic produced coal completely；In addition, coal physics is inhaled
Attached oxygen and not all participation heating and oxidation process, this is decided by coal texture；Oxygen absorbed during temperature programmed oxidation
And crossing point temperature is difficult the spontaneous combustion tendency of completely true reflection coal by the passive heating to coal sample.
Summary of the invention
The present invention is based at least one above-mentioned technical problem, proposes a kind of new determining coal ignitability side
Case improves the accuracy rate of coal ignitability's measurement result.
In view of this, a kind of determining coal ignitability device is proposed according to the present invention, including：Outer layer main box,
Coal bin, the coal sample tank for holding coal body and signal receive analysis system；Wherein, it is arranged on the side wall of the outer layer main box
There are oil inlet, fuel outlet and the valve being arranged at the oil inlet and the fuel outlet, the outer layer main box top cover
Equipped with main box cover board, the coal bin is arranged in the outer layer main box, and the coal bin top cover is equipped with coal bin cover board, described
Air inlet pipe is provided on coal bin side wall, the air inlet pipe runs through the side wall of the outer layer main box and is connected to air compressor,
Gas flow controller is additionally provided in the air inlet pipe, the coal sample tank is arranged in the coal bin, and bottom is netted, institute
It states and is provided with exhaust pipe, electromagnetic radiation tester and thermocouple on coal bin cover board, one end of the thermocouple extends to the coal
In sample tank, the other end of the thermocouple is connected to temperature controller, and the outer layer main box is interior and is located at below the coal bin
It is provided with electric furnace heating wire, the electric furnace heating wire is connected to the temperature controller, and it includes host that the signal, which receives analysis system, described
Host is connected to the electromagnetic radiation tester.
In the technical scheme, coal bin is arranged in outer layer main box, and coal sample tank is arranged in coal bin, is packed into coal sample tank
Coal sample to be tested, by the oil inlet of outer layer main box, oiling in outer layers main box, thermocouple heats up coal body autothermal oxidation
Temperature signal afterwards is transmitted to temperature controller, by temperature controller according to the surveyed coal temperature signal of the thermocouple received,
Heating of the electric furnace heating wire to oil bath is controlled, is consistent the temperature of oil bath with coal temperature always, coal body is from thermogenetic heat
It does not scatter and disappear, after entering in coal bin additionally by the gas that air compressor generates, guarantees gas temperature and coal via oil bath heating
Temperature is identical, so that coal body always in an isoperibol, avoids carrying out during coal body autothermal oxidation with the external world
Heat exchange, it is ensured that the detection accuracy of subsequent ELECTROMAGNETIC RADIATION SIGNATURE detects the electromagnetism of coal body by electromagnetic radiation tester
Radiation signal, host pass through the spontaneous combustion tendency analyzed to determine coal body to ELECTROMAGNETIC RADIATION SIGNATURE, entire test device cost
It is low, it is easy to operate, it is easy to use, it is not easy to be affected by human factors, improves the accuracy of test result.
In the above-mentioned technical solutions, it is preferable that the bottom of the outer layer main box is provided with coal bin strut assemblies, the coal
Case is based on the coal bin strut assemblies and is arranged in the outer layer main box.
In any of the above-described technical solution, it is preferable that the coal bin strut assemblies include four coal bin pillars, described four
Root coal bin pillar is distributed in the electric furnace heating wire two sides in pairs.
In any of the above-described technical solution, it is preferable that hanging column in coal bin is provided on the inner sidewall of the coal bin, it is described
Coal breakage plate hanger is linked in coal bin on hanging column, coal breakage baffle is installed on the coal breakage plate hanger.
In any of the above-described technical solution, it is preferable that it further includes amplifier that the signal, which receives analysis system, described to put
The input terminal of big device is connected to the electromagnetic radiation tester, and the output end of the amplifier is connected to the host.
According to the second aspect of the invention, a kind of method for determining coal ignitability is proposed, any of the above-described is based on
The measuring method of the determining coal ignitability device, including：The coal body of predetermined amount is put into the coal sample tank, and
Coal bin cover board is covered, the valve being located at the oil inlet is opened, after injection oil liquid is until the outer layer main box case is full, capping
The main box cover board, and be powered and open the host；The host obtains the electromagnetic radiation in predetermined monitoring time
The ELECTROMAGNETIC RADIATION SIGNATURE that tester detects, wherein the ELECTROMAGNETIC RADIATION SIGNATURE is by the coal body autothermal oxidation temperature-rise period
Middle generation；The host calculates electromagnetic radiation intensity average value A according to the ELECTROMAGNETIC RADIATION SIGNATURE gotE, electromagnetism spoke
Penetrate umber of pulse AP, electromagnetic radiation intensity change rate △ E and pulse of electromagnetic radiation number change rate △ P；The host is determining institute
State electromagnetic radiation intensity average value AE, the pulse of electromagnetic radiation number AP, the electromagnetic radiation intensity change rate △ E and described
When pulse of electromagnetic radiation number change rate △ P meets following one or more conditions, determine that the coal body has spontaneous combustion tendency：
AE ≥EL； AP≥PL；△E≥KE；△P≥KP；Wherein, ELCritical value, P for electromagnetic radiation intensityLFor pulse of electromagnetic radiation number
Critical value, KEFor the critical value and K of electromagnetic radiation intensity change ratePFor the critical value of pulse of electromagnetic radiation number change rate.
In the technical scheme, it is contemplated that the ELECTROMAGNETIC RADIATION SIGNATURE generated in coal body autothermal oxidation temperature-rise period can be effective
Coal ignitability is reacted, so determining whether coal body has spontaneous combustion tendency to the analysis of ELECTROMAGNETIC RADIATION SIGNATURE by host
Property, improve the accuracy rate of coal ignitability's measurement result.
By above technical scheme, the accuracy rate of coal ignitability's measurement result is improved.
Detailed description of the invention
Fig. 1 shows the structural schematic diagram of the determining coal ignitability device of embodiment according to the present invention.
Wherein, the appended drawing reference in Fig. 1 and the corresponding relationship between component names are：
10 determining coal ignitability devices, 101 outer layer main boxes, 102 coal bins, 103 coal sample tanks, 104 oil inlets, 105 put
Hydraulic fluid port, 106 valves, 107 main box cover boards, 108 coal bin cover boards, 109 air inlet pipe, 110 air compressors, 111 gas flow controls
Device processed, 112 exhaust pipes, 113 electromagnetic radiation testers, 114 thermocouples, 115 temperature controllers, 116 electric furnace heating wires, 117 hosts,
118 coal bin pillars, hanging column in 119 coal bins, 120 coal breakage plate hangers, 121 coal breakage baffles, 122 amplifiers.
Specific embodiment
To better understand the objects, features and advantages of the present invention, below with reference to attached
It is that in the absence of conflict, the feature in embodiments herein and embodiment can be combined with each other.
Fig. 1 shows the structural schematic diagram of the determining coal ignitability device of embodiment according to the present invention.
As shown in Figure 1, determining coal ignitability device 10 includes：Outer layer main box 101, coal bin 102, for holding
The coal sample tank 103 and signal of coal body receive analysis system；Wherein, oil inlet is provided on the side wall of outer layer main box 101
104, fuel outlet 105 and the valve 106 being arranged at oil inlet 104 and fuel outlet 105,101 top cover of outer layer main box are set
There is main box cover board 107, coal bin 102 is arranged in outer layer main box 101, and 102 top cover of coal bin is equipped with coal bin cover board 108, coal
Air inlet pipe 109 is provided on 102 side wall of case, air inlet pipe 109 runs through the side wall of outer layer main box 101 and is connected to air compression
Machine 110 is additionally provided with gas flow controller 111 in air inlet pipe 109, and coal sample tank 103 is arranged in coal bin 102, and bottom is
It is netted, it is provided with exhaust pipe 112, electromagnetic radiation tester 113 and thermocouple 114 on coal bin cover board 108, the one of thermocouple 114
End extends in coal sample tank 103, and the other end of thermocouple 114 is connected to temperature controller 115, in outer layer main box 101 and position
Electric furnace heating wire 116 is provided with below coal bin 102, electric furnace heating wire 116 is connected to temperature controller 115, and signal receives analysis system packet
Host 117 is included, host 117 is connected to electromagnetic radiation tester 113.
Further, the bottom of outer layer main box is provided with coal bin strut assemblies, and coal bin 102 is based on coal bin strut assemblies and sets
It sets in outer layer main box 101, coal bin strut assemblies include four coal bin pillars 118, four coal bin pillars 118 two-by-two one
Group is distributed in 116 two sides of electric furnace heating wire.
Further, it is provided with hanging column 119 in coal bin on the inner sidewall of coal bin 102, is linked with and falls on hanging column 119 in coal bin
Coal plate hanger 120 is equipped with coal breakage baffle 121 on coal breakage plate hanger 120.
Further, it further includes amplifier 122 that signal, which receives analysis system, and the input terminal of amplifier 122 is connected to electromagnetism
Tester 113 is radiated, the output end of amplifier 122 is connected to host 117.
When test, test device is first installed：
Coal breakage plate hanger 120 is placed in coal bin on hanging column 119, coal breakage baffle 121 is placed；A certain amount of coal body is put into
Coal sample tank 103 seals up coal bin cover board 108 after installing exhaust pipe 112, electromagnetic radiation tester 113, thermocouple 114；Installation
Good air inlet pipe 109 opens oil inlet 104, and injection oil liquid is full to case, seals up main box cover board 107；Connect temperature controller 115
With thermocouple 114 and electric furnace heating wire 116, it is powered and opens host 117, amplifier 122；Initialize host embedded software, electromagnetism spoke
Signal analysis program is penetrated to bring into operation；When operation, 117 system of host will prompt operating procedure, display display operation process
And test result；Host obtains the ELECTROMAGNETIC RADIATION SIGNATURE that electromagnetic radiation tester detects in predetermined monitoring time, wherein described
ELECTROMAGNETIC RADIATION SIGNATURE is by generating in coal body autothermal oxidation temperature-rise period；Host is according to the ELECTROMAGNETIC RADIATION SIGNATURE got, meter
Calculate electromagnetic radiation intensity average value AE, pulse of electromagnetic radiation number AP, electromagnetic radiation intensity change rate △ E and pulse of electromagnetic radiation
Number change rate △ P；Host is determining electromagnetic radiation intensity average value AE, pulse of electromagnetic radiation number AP, electromagnetic radiation intensity change rate
When △ E and pulse of electromagnetic radiation number change rate △ P meet following one or more conditions, determine that coal body is inclined to spontaneous combustion
Property： AE ≥EL； AP≥PL；△E≥KE；△P≥KP；Wherein, ELCritical value, P for electromagnetic radiation intensityLFor electromagnetic radiation arteries and veins
Rush critical value, the K of numberEFor the critical value and K of electromagnetic radiation intensity change ratePFor the critical of pulse of electromagnetic radiation number change rate
Value, EL、PL、KE、KPIt can be inputted in advance by tester by keyboard.
Coal bin is arranged in outer layer main box, and coal sample tank is arranged in coal bin, and coal sample to be tested is packed into coal sample tank, is passed through
The oil inlet of outer layer main box, oiling in outer layers main box, the temperature signal after thermocouple heats up coal body autothermal oxidation pass
Temperature controller is transported to, by temperature controller according to the surveyed coal temperature signal of the thermocouple received, controls electric furnace heating wire to oil
The heating of bath is consistent the temperature of oil bath with coal temperature always, and coal body does not scatter and disappear from thermogenetic heat, additionally by
After the gas that air compressor generates enters in coal bin, guarantee that gas temperature is identical as coal temperature via oil bath heating, thus
So that coal body always in an isoperibol, avoids carrying out heat exchange with the external world during coal body autothermal oxidation, it is ensured that after
The detection accuracy of continuous ELECTROMAGNETIC RADIATION SIGNATURE, the ELECTROMAGNETIC RADIATION SIGNATURE of coal body is detected by electromagnetic radiation tester, and host is logical
The analysis to ELECTROMAGNETIC RADIATION SIGNATURE is crossed to determine the spontaneous combustion tendency of coal body, entire test device is at low cost, and it is easy to operate, it uses
It is convenient, it is not easy to be affected by human factors, improves the accuracy of test result.
The technical scheme of the present invention has been explained in detail above with reference to the attached drawings, and technical solution of the present invention proposes a kind of new
Determining coal ignitability scheme improves the accuracy rate of coal ignitability's measurement result.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for
For those skilled in the art, the invention may be variously modified and varied.It is all the spirit and principles in the present invention it
Interior, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of determining coal ignitability device, which is characterized in that including：
Outer layer main box, coal bin, the coal sample tank for holding coal body and signal receive analysis system；
Wherein, oil inlet, fuel outlet and setting are provided on the side wall of the outer layer main box in the oil inlet and described
Valve at fuel outlet, the outer layer main box top cover are equipped with main box cover board, and the coal bin is arranged in the outer layer main tank
In vivo, the coal bin top cover is equipped with coal bin cover board, air inlet pipe is provided on the coal bin side wall, the air inlet pipe is through described
The side wall of outer layer main box is simultaneously connected to air compressor, and gas flow controller, the coal are additionally provided in the air inlet pipe
Sample tank be arranged in the coal bin, bottom be it is netted, be provided on the coal bin cover board exhaust pipe, electromagnetic radiation tester and
Thermocouple, one end of the thermocouple extend in the coal sample tank, and the other end of the thermocouple is connected to temperature controller,
Electric furnace heating wire is provided in the outer layer main box and below the coal bin, the electric furnace heating wire is connected to the temperature control
Device, it includes host that the signal, which receives analysis system, and the host is connected to the electromagnetic radiation tester.
2. determining coal ignitability device according to claim 1, which is characterized in that the bottom of the outer layer main box
Coal bin strut assemblies are provided with, the coal bin is based on the coal bin strut assemblies and is arranged in the outer layer main box.
3. determining coal ignitability device according to claim 2, which is characterized in that the coal bin strut assemblies include
Four coal bin pillars, four coal bin pillars are distributed in the electric furnace heating wire two sides in pairs.
4. determining coal ignitability device according to claim 1, which is characterized in that on the inner sidewall of the coal bin
It is provided with hanging column in coal bin, coal breakage plate hanger is linked in the coal bin on hanging column, coal breakage is installed on the coal breakage plate hanger
Baffle.
5. determining coal ignitability device according to any one of claim 1 to 4, which is characterized in that the letter
Number receive analysis system further include amplifier, the input terminal of the amplifier is connected to the electromagnetic radiation tester, described to put
The output end of big device is connected to the host.
6. a kind of method for determining coal ignitability, based on the coal ignitability as described in any one of claims 1 to 5
Measurement device measuring method, which is characterized in that including：
The coal body of predetermined amount is put into the coal sample tank, and covers coal bin cover board, opens the valve being located at the oil inlet,
After injecting oil liquid until the outer layer main box case is full, the main box cover board is covered, and be powered and open the host；
The host obtains the ELECTROMAGNETIC RADIATION SIGNATURE that the electromagnetic radiation tester detects in predetermined monitoring time, wherein institute
Stating ELECTROMAGNETIC RADIATION SIGNATURE is by generating in the coal body autothermal oxidation temperature-rise period；
The host calculates electromagnetic radiation intensity average value A according to the ELECTROMAGNETIC RADIATION SIGNATURE gotE, pulse of electromagnetic radiation
Number AP, electromagnetic radiation intensity change rate △ E and pulse of electromagnetic radiation number change rate △ P；
The host is determining the electromagnetic radiation intensity average value AE, the pulse of electromagnetic radiation number AP, the electromagnetic radiation it is strong
When the degree change rate △ E and pulse of electromagnetic radiation number change rate △ P meets following one or more conditions, the coal is determined
Body has spontaneous combustion tendency：
AE ≥EL；
AP≥PL；
△E≥KE；
△P≥KP；
Wherein, ELCritical value, P for electromagnetic radiation intensityLCritical value, K for pulse of electromagnetic radiation numberEFor electromagnetic radiation intensity
The critical value and K of change ratePFor the critical value of pulse of electromagnetic radiation number change rate.
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Cited By (3)
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| CN110308173A (en) * | 2019-07-03 | 2019-10-08 | 太原理工大学 | A kind of pile of biomass spontaneous combustion tendency measuring method based on hazard index analysis |
| CN111999343A (en) * | 2020-09-01 | 2020-11-27 | 中国矿业大学(北京) | Coal spontaneous combustion characteristic parameter measurement experiment platform |
| CN114922691A (en) * | 2022-05-17 | 2022-08-19 | 中国矿业大学 | Coal body ignition condition testing device used in coal mine explosion environment |
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