CN105807029B - Coal spontaneous combustion characteristic detecting apparatus based on thermogravimetric - Google Patents
Coal spontaneous combustion characteristic detecting apparatus based on thermogravimetric Download PDFInfo
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- CN105807029B CN105807029B CN201610338042.5A CN201610338042A CN105807029B CN 105807029 B CN105807029 B CN 105807029B CN 201610338042 A CN201610338042 A CN 201610338042A CN 105807029 B CN105807029 B CN 105807029B
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- 239000003245 coal Substances 0.000 title claims abstract description 215
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 17
- 230000002269 spontaneous effect Effects 0.000 title claims abstract description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 48
- 229910052802 copper Inorganic materials 0.000 claims abstract description 48
- 239000010949 copper Substances 0.000 claims abstract description 48
- 238000010438 heat treatment Methods 0.000 claims abstract description 43
- 238000001816 cooling Methods 0.000 claims abstract description 18
- 238000012360 testing method Methods 0.000 claims abstract description 14
- 238000009413 insulation Methods 0.000 claims abstract description 9
- 239000007789 gas Substances 0.000 claims description 159
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 30
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 18
- 239000001301 oxygen Substances 0.000 claims description 18
- 229910052760 oxygen Inorganic materials 0.000 claims description 18
- 229910052757 nitrogen Inorganic materials 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 9
- 238000004458 analytical method Methods 0.000 claims description 6
- 238000010792 warming Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 2
- 238000013481 data capture Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 239000011490 mineral wool Substances 0.000 claims description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims 1
- 238000004153 renaturation Methods 0.000 claims 1
- 230000003647 oxidation Effects 0.000 abstract description 27
- 238000007254 oxidation reaction Methods 0.000 abstract description 27
- 238000012986 modification Methods 0.000 abstract description 18
- 230000004048 modification Effects 0.000 abstract description 18
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 8
- 238000005303 weighing Methods 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004817 gas chromatography Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 241001012508 Carpiodes cyprinus Species 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000007353 oxidative pyrolysis Methods 0.000 description 1
- 238000006213 oxygenation reaction Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 208000016261 weight loss Diseases 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels; Explosives
- G01N33/222—Solid fuels, e.g. coal
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The present invention relates to the coal spontaneous combustion characteristic detecting apparatus based on thermogravimetric,The oxidation temperature-raising characteristic curve of effective lower coal sample of settlement procedure heating,The synchro measure problem of quality knots modification and production/gas consumption feature,High-pressure cylinder connects through gas pre-mixed device and preheating copper pipe,Preheating copper pipe is placed in coal sample tank bracket,Coal sample tank bracket stretches out casing and is placed on balance,There is cooling copper pipe in top,There is coal sample tank in coal sample tank bracket,Preheating,The copper pipe that cools connects with coal sample canister incoming gas and gas outlet,Cooling copper pipe is connected on gas chromatograph,There is zone of heating outside casing,There is heating wire in zone of heating,There is heat-insulation layer outside zone of heating,Heating wire and programmed temperature-rising controller connect,There is temperature sensor in coal sample tank,Temperature sensor and coal sample temperature data acquisition card connect,Programmed temperature-rising controller,Coal sample temperature data acquisition card,Balance,Gas chromatograph connects with computer,Automaticity of the present invention is high,Reliable test result.
Description
Technical field
The present invention relates to a kind of coal spontaneous combustion characteristic detecting apparatus based on thermogravimetric.
Background technology
Coal is one of China's important energy source, is maintained at more than 70% in China's energy resource structure so far the 1990s.
But the spontaneous combustion of coal not only causes the loss of coal resources in China, while the also safe working of serious threat coal resources.Cause
And, it is necessary to research understands the ignition quality of coal, builds the relation service in Coal Self-ignition Process between parameters in China's coal
The protection and exploitation of charcoal resource.Use for laboratory has in the capital equipment of the ignition quality of Study on Coal at present：Adiabatic oxygenation device, journey
The equipment such as sequence heat riser, Fourier infrared spectrograph and thermal analyzer.Wherein temperature programming equipment and thermal analyzer feature is such as
Under：Temperature programming equipment research coal spontaneous combustion characteristic is that coal sample is placed in temperature programming stove, and temperature programming stove carries out temperature programming
Accelerate the oxidation heating of coal sample, obtain coal sample oxidation temperature-raising characteristic curve in Temperature Programmed Processes, and can be with gas-chromatography
Instrument combination obtains gas component and volume fraction in oxidation of coal temperature-rise period；Thermal analyzer Study on Coal ignition quality is to utilize
Coal sample is aoxidized under program temperature control, so as to obtain the relation between coal sample quality knots modification and temperature, while can be obtained
Obtain suction/thermal discharge of the coal sample in oxidizing process.
But temperature programming equipment can not obtain coal this coal spontaneous combustion of the quality knots modification of coal sample in temperature-rise period is aoxidized
The important parameter of characteristic；And the equipment that thermal analyzer is developed not directed to oxidation of coal characteristic, the institute in terms of oxidation of coal research
What is focused on is only quality knots modification of the coal sample in temperature-rise period, meanwhile, current existing thermal analyzer is in order to take into account to heat
The analysis of amount, focus on sensitivity, cause analyzed sample quality small, because the coal sample quality for testing used is small, unit mass coal
Gas production of the sample in temperature-rise period is aoxidized is small, and gas component and volume fraction generated in oxidation of coal process can not be determined
Amount analysis.And hot-red through transport technology used at present（Thermal analyzer is combined with infrared spectrum）It is only capable of the functional group to gas
Analyzed.Temperature programming equipment causes air flow through when testing oxidation of coal temperature-raising characteristic to be flowed through broken coal sample and accumulates to be formed
Space and thermal analyzer is then coal sample is in oxidizing atmosphere, and flow a gas through broken coal body and accumulate the space to be formed and then more accord with
The process of the oxidation of the something lost coal in goaf after conjunction coal mine work area back production.If using temperature programming and thermal analyzer to coal sample point
Not analyzed, first, causing, wasted time and energy, labor intensity is big, second, big quality coal sample（Temperature programming）With small quality coal sample
（Thermal analyzer）Contrast can not be formed, coal sample quality in temperature-rise period can not be obtained and changed between gas generation/consumption
Relation.Coal produced gas in oxidizing process temperature-rise period occurs caused by oxidative pyrolysis just because of coal, the quality of coal
It will necessarily change, thus build the relation pair and oxidation of coal characteristic of mass change and coal aerogenesis feature during oxidation of coal
Study most important.Therefore, how heat analysis quality awareness change is tested into this feature to be combined with temperature programming equipment,
So as to obtain coal sample coal sample under temperature-raising characteristic curve, quality knots modification and different temperatures in aoxidizing temperature-rise period simultaneously
Production/gas consumption feature, it is currently to compel highly necessary to solve the problems, such as.
The content of the invention
For the above situation, to overcome prior art defect, the purpose of the present invention is just to provide a kind of coal based on thermogravimetric
Ignition quality determines device, can effectively settlement procedure heating time coal sample oxidation temperature-raising characteristic curve, quality knots modification and production/
The synchro measure problem of gas consumption feature.
The technical scheme that the present invention solves is that oxygen pressure steel cylinder is connected through the first gas circuit pipeline with gas pre-mixed device,
Nitrogen high-pressure cylinder connects with the first gas circuit pipeline, gas pre-mixed device respectively through the second gas circuit pipeline, gas pre-mixed device warp
First gas pipeline is connected with air inlet pipe, and air inlet pipe is connected with preheating copper pipe, and preheating copper pipe is placed in coal sample tank bracket bottom, in advance
Coal sample tank bracket bottom below hot copper pipe extends downwardly from the casing of temperature programming case, is placed on the pallet of balance, coal sample tank branch
The casing of temperature programming case is stretched out at the top of frame upwards, there is the casing top for being placed in temperature programming case in the top of coal sample tank bracket
The cooling copper pipe of top, preheat and coal sample tank is housed in the coal sample tank bracket above copper pipe, preheating copper pipe enters with coal sample tank bottom
Gas port is connected, and the gas outlet on coal sample tank top is connected with cooling copper pipe, and cooling copper pipe connects second gas pipeline through escape pipe, the
Two gas pipings are connected on gas chromatograph, and gone out gas is analyzed by gas chromatograph, temperature programming case be by casing,
Zone of heating, heat-insulation layer, programmed temperature-rising controller, coal sample temperature data acquisition card and balance combine the closing knot of composition
Structure, casing periphery are enclosed with zone of heating, there is heating wire in zone of heating, and zone of heating outer wrap has heat-insulation layer, heating wire and casing
Outside programmed temperature-rising controller connection, programmed temperature-rising controller control the power of the heating wire in zone of heating to realize the liter of casing
Temperature, coal sample tank stretch out coal sample tank bracket and coal sample temperature data acquisition built with temperature sensor, the free end of temperature sensor
Card is connected, coal sample temperature data acquisition cartoon excess temperature sensor samples of coal pulled temperature, programmed temperature-rising controller, coal sample temperature
Data collecting card, balance, gas chromatograph are connected with computer.
The present invention realizes the oxidation heating of coal under different oxygen concentrations atmosphere, the oxygen concentration in oxidation of coal temperature-rise period
Change；The measurement of coal sample quality temperature and mass change in oxidation of coal temperature-rise period can be achieved；Coal can be achieved to heat up in oxidation
During gas generation feature measure, automaticity of the present invention is high, reliable test result, realizes the same of oxidation of coal heating
When ature of coal amount knots modification can be measured in real time.
Brief description of the drawings
Fig. 1 is the structural front view of the present invention.
Fig. 2 is the structure chart of the carrier of coal sample tank of the present invention.
Fig. 3 is the structure sectional view of the gas pre-mixed device of the present invention.
Fig. 4 is Fig. 3 of the present invention A-A to sectional view（Amplification）.
Embodiment
The embodiment of the present invention is elaborated below in conjunction with accompanying drawing.
Provided by Fig. 1-Fig. 4, structure of the invention is that oxygen pressure steel cylinder 1 is through the first gas circuit pipeline a and gas pre-mixed dress
Put 9 to be connected, nitrogen high-pressure cylinder 5 connects with the first gas circuit pipeline a, gas pre-mixed device 9 respectively through the second gas circuit pipeline b, gas
Body pre-mixing apparatus is connected through first gas pipeline c with air inlet pipe 10, and air inlet pipe is connected with preheating copper pipe 11, and preheating copper pipe 11 is placed in
In coal sample tank bracket bottom, the casing that the coal sample tank bracket bottom below copper pipe extends downwardly from temperature programming case is preheated, is placed in day
On flat 18 pallet, the casing of temperature programming case is stretched out at the top of coal sample tank bracket upwards, is put in the top of coal sample tank bracket
Cooling copper pipe 13 above the casing top of temperature programming case, preheat in the coal sample tank bracket above copper pipe and coal sample tank is housed
12, preheating copper pipe 11 is connected with the air inlet of the bottom of coal sample tank 12, and the gas outlet on the top of coal sample tank 12 is connected with cooling copper pipe 13,
The copper pipe that cools connects second gas pipeline d through escape pipe 14, and second gas pipeline d is connected on gas chromatograph 15, by gas phase color
Spectrometer is analyzed gone out gas, and temperature programming case is by casing 24, zone of heating 20, heat-insulation layer 21, programmed temperature-rising controller
22nd, coal sample temperature data acquisition card 23 and balance 18 combine the enclosed construction of composition, and casing periphery is enclosed with zone of heating,
There is heating wire in zone of heating, zone of heating outer wrap has heat-insulation layer, and heating wire connects with the programmed temperature-rising controller outside casing,
The power of heating wire in programmed temperature-rising controller control zone of heating realizes the heating of casing, and coal sample tank is built with temperature sensor
16, the free end of temperature sensor is stretched out coal sample tank bracket and is connected with coal sample temperature data acquisition card 23, coal sample temperature data
Capture card by the samples of coal pulled temperature of temperature sensor 16, programmed temperature-rising controller, coal sample temperature data acquisition card, balance 18,
Gas chromatograph is connected with computer.
The first pressure-reducing valve 2, the first voltage stabilizing are connected with turn between the described gas circuit pipeline a of oxygen pressure steel cylinder 1 and first
Valve 3, first gas mass flow controller 4；
The second pressure-reducing valve 6, the second voltage stabilizing are connected with turn between the described gas circuit pipeline b of nitrogen high-pressure cylinder 5 and second
Valve 7, second gas mass flow controller 8；
There is the coal sample tank bracket containment vessel mounted in the casing top of temperature programming case described coal sample tank bracket upper end periphery
19, the interference of outer bound pair coal sample tank bracket 17 is prevented, influences the measurement of quality；
Described temperature programming case is provided with chamber door, and coal sample tank is mounted and dismounted for opening；
Described heat-insulation layer 21 is shell structure made of mineral wool；
Described coal sample tank bracket 17 passes through the position of casing, and perforation is provided with casing, ensures the He of coal sample tank bracket 17
Casing crossover sites have space, are not in contact（Support is connected by stretching casing of perforating with the pallet of balance, is in order that support
Do not contacted with casing, support is only contacted with the pallet of balance.It is in casing that the top of support, which is used for supporting cooling copper pipe 13,
Top, play the purpose of cooling gas）；
Described coal sample tank bracket is by carrier 26, the coal sample tank of the bottom-up preheating copper pipe to link together vertically
Carrier 27（As shown in Figure 2）The integrative-structure formed with the carrier 28 of cooling copper pipe, preheat carrier, the coal sample of copper pipe
The cross section of the carrier of tank and the carrier of cooling copper pipe is in equilateral triangle；
The center of described equilateral triangle is annulus, and three angles of annulus and equilateral triangle connect through three supporting sticks respectively
Connect；
The middle part of carrier 27 of described coal sample tank is embedded with the coal sample tank fixed mount of equilateral triangle, coal sample tank fixed mount
Three sides center is equipped with the fixed angles 29 for fixing coal sample tank position, for ensuring that each coal sample tank installation site is consistent,
So as to ensure the repeatability of test；
Described fixed angles 29 are catch straight up, and the bottom of coal sample tank is installed on three sides of coal sample tank fixed mount
In the space that the fixed angles 29 at center surround；
Described gas pre-mixed device 9 is the second mixing chamber of gas 31 of the first mixing chamber of gas 30 and prismatic by prismatic
Demountable structure is formed through threaded connection, the mixing chamber of gas first is to connect and compose prismatic by anterior triangle and rear portion triangle
Structure, there is the dividing plate 32 that shape identical longitudinal section is triangle in the rear portion triangle of the mixing chamber of gas first, dividing plate is before
It is inlaid in backward in the rear portion triangle of the mixing chamber of gas first, the front and rear sides of dividing plate and the rear portion three of the mixing chamber of gas first
Angular front and rear sides overlap, and have the first air-flow between the top of dividing plate and the top of the rear portion triangle of the mixing chamber of gas first
Passage 33, there is the second gas channel 34 between the bottom of the rear portion triangle of the mixing chamber of following and gas first of dividing plate, and first
The junction for being intersected in the mixing chamber of gas first and the second mixing chamber of gas channel and the second gas channel, dividing plate make gaseous mixture
Body shunts and confluxing in the second mixing chamber of gas 31 makes air-flow form disturbance so as to make gas be reached in the second mixing chamber of gas 31
To more preferable premixing effect, according to the size of gas flow, the first mixing chamber of gas 30 is one or more.
Described air inlet pipe 10 and escape pipe 14 is polyfluortetraethylene pipe.
Described programmed temperature-rising controller 22 and coal sample temperature data acquisition card 23 is prior art, and temperature programming controls
The LA-36 temperature programming temperature controllers of the holy China's production of device such as LOTUSANA Long Tengs；Coal sample temperature data acquisition card 23 is temperature acquisition
Card or moisture recorder, moisture recorder such as sinomeasure SIN-R6000C colorful paper-free recorder humidity stress electric currents
Voltage electric quantity curve moisture recorder.
Described balance 18 is prior art, the precise electronic balance Cubis MSU2203S- produced such as Sai Duolisi
000-DA, precise electronic balance Cubis MSE3203S-000-DA, precise electronic balance Cubis MSA5203S-000-
DR（Readability is 1mg, and maximum range is respectively 2.2kg, 3.2kg, 5.2kg）.
, can be same the invention provides the device that coal weight-loss can be determined while a kind of test oxidation of coal temperature-raising characteristic
When obtain coal sample coal sample under temperature-raising characteristic curve, quality knots modification and different temperatures in aoxidizing temperature-rise period production/gas consumption
Feature.So as to construct coal sample production/gas consumption feature and change with temperature and quality knots modification and coal sample temperature-raising characteristic curve with quality
Relation between variable etc.；Wherein, obtain quality knots modification of the coal in oxidation temperature-rise period in real time by balance, passed by temperature
Sensor obtains temperature change of the coal in temperature-rise period is aoxidized in real time, and coal under different temperatures is obtained by being combined gas chromatograph
Production/gas consumption feature, realize that oxidation of the coal under different oxygen concentrations heats up by gas mass flow controller；Wherein, quality
Knots modification part of detecting（The structure of quality knots modification part of detecting is that coal sample tank bracket is connected with balance, by the way that coal sample is loaded
Coal sample tank is simultaneously connected into gas circuit, so as to realize the measurement of the quality in coal sample in temperature-rise period, wherein air inlet pipe and outlet
Guan Jun is realized using polyfluortetraethylene pipe to be connected with the first gas pipeline c outside temperature programming case, second gas pipeline d, enter,
The interference that escape pipe is formed to mass measurement can be corrected deduction by standard substance；Balance is electronic analytical balance, can be real
Clearing, display and the data acquisition of existing balance quality.In addition, coal sample tank bracket exposes temperature programming case uses coal sample with outer portion
Tank bracket containment vessel is protected, and reduces extraneous confrontation so as to realize that whole quality test is partially in the environment of relative closure
The interference of measurement）It is then that coal sample tank bracket is reduced it using the skeleton structure of equilateral triangle while stability is ensured
Quality, coal sample tank bracket completes the support to preheating copper pipe, coal sample tank and the copper pipe that cools simultaneously, and coal sample tank bracket exposes program
Warming box carries out protection with outer portion by coal sample tank bracket containment vessel makes whole quality test be partially in relatively closed sky
Between so as to reduce the external world interference；Wherein, air-channel system（The structure of air-channel system is, by oxygen pressure steel cylinder and nitrogen high pressure
Steel cylinder provides oxygen source and Nitrogen source gases respectively, and oxygen pressure steel cylinder is sequentially connected with the first pressure-reducing valve, the first pressure maintaining valve 3,
One gas mass flow controller 4 is simultaneously connected by the first gas circuit pipeline a with gas pre-mixed device；Nitrogen high-pressure cylinder sequentially connects
Connect the second pressure-reducing valve 6, the second pressure maintaining valve 7, second gas mass flow controller 8 and be connected to by the second gas circuit pipeline b
One gas circuit pipeline a is finally connected with gas pre-mixed device 9；Oxygen and nitrogen are premixed uniformly through first through gas pre-mixed device 9
Gas piping c is connected through air inlet pipe 10 with preheating copper pipe 11, and preheating copper pipe 11 is connected with the air inlet of the bottom of coal sample tank 12, coal sample
The gas outlet on the top of tank 12 is connected with cooling copper pipe 13 and is connected outside second gas pipeline d, final gas by escape pipe 14
Analyzed into gas chromatograph 15）, controlled by oxygen pressure steel cylinder, nitrogen high-pressure cylinder, first gas mass flow
Device, second gas mass flow controller and gas pre-mixed device realize the premix of different flow different oxygen concentrations gas, are
The oxidation of coal provides different oxidation environments, realizes and changes its oxidation environment in oxidation of coal temperature-rise period；Wherein, it is gas pre-mixed
Device is made up of the mixing chamber of gas first and the mixing chamber of gas second, and the first mixing chamber of gas front portion is confluxed for gas, rear portion
Make two strands of air-flows enter the second mixing chamber of gas phase for gas distribution mutually to disturb to reach more preferable mixed effect；The gas
Chromatography, programmed temperature-rising controller, coal sample temperature data acquisition card, day are averagely connected with computer realizes the automatic note of data
Record, i.e. programmed temperature-rising controller realize the real-time collection to spin manifold temperature and transfer data to computer by connection and carry out
Automatic record；Coal sample temperature data acquisition cartoon excess temperature sensor samples of coal pulled temperature is transmitted to computer by connection
The automatic record of row；Balance to measured quality gather in real time and sends data to computer by connection；Gas phase color
Spectrometer by connection sends data to computer after analyzing gas component.
In use, needing to correct, carried out before first time use or every the regular period to instrument（The present invention）Quality
Weighing part is once corrected, and bearing calibration is as follows：Balance is corrected using standard test weight, timing should ensure that coal sample
Tank, air-channel system and temperature sensor are in normal connection status so as to exclude the connecting tube circuit such as gas circuit, temperature sensor
Interference to mass measurement.In view of coal sample at room temperature ~ 300 DEG C mass change amount be up to 10% and experiment use coal
Sample mass M（g）, thus only 90% ~ 100%M of quality Weighing system range of weighing is corrected, the prothyl as at the beginning of survey coal sample
Measure as 50g, then to quality Weighing system（Quality weighing system meaning coal sample tank, coal sample tank bracket, balance, preheating copper pipe, cooling
Copper pipe, temperature sensor, air inlet pipe, escape pipe.Because temperature sensor, air inlet pipe, escape pipe directly contact with warming box,
Test result may be formed and disturbed, thus need to be corrected.Certainly also need can be determined whether according to the size of interference
Correct）Measurement between 45 ~ 50g is corrected.Correction uses standard test weight to be incremented by with 1mg, but by the work of timing
Amount can suitably expand the incremental stride of counterweight and obtain other data finally by difference.Can according to counterbalance mass and balance display quality
To obtain deviation of the quality weighing system in corresponding mass, i.e. mass deviation=counterbalance mass-balance display quality.
The chamber door of temperature programming case is opened, coal sample tank is taken out and cleared up, weight after the coal sample tank of sky is cleaned out
The new air-tightness for being connected into air-channel system and ensuring connection；Oxygen pressure steel cylinder, nitrogen high-pressure cylinder are opened, first gas matter is set
Measure the flow value of flow controller and second gas mass flow controller（Such as：Total gas couette needed for experiment is 100mL/
Min, oxygen and nitrogen volume fraction are respectively 20%, 80%, then by first gas mass flow controller and second gas quality
Flow controller is respectively set to 20mL/min and 80mL/min, before this first gas mass flow controller oxygen
It is corrected, second gas mass flow controller is corrected with nitrogen）, oxygen and nitrogen flow after setting completed, oxygen
Gas and nitrogen will be well mixed by excessively gas pre-mixed device, well mixed gas will by first gas pipeline c, enter
Tracheae 10, preheating copper pipe 11, coal sample tank 12, cooling copper pipe 13, escape pipe 14, second gas pipeline d flow into gas chromatograph and entered
Row analysis, experiment can be then proceeded by after gas chromatograph institute detection gas component is setting value.Gas chromatograph is detected
After gas component is stable, it is zeroed out using balance, under opening temperature programming case dismantles coal sample tank from air-channel system afterwards
Come, coal sample well prepared in advance is prior art by the lid for opening coal sample tank）Load lid and access that coal sample tank screws coal sample tank
Air-channel system.Playing coal sample quality this moment can then be recorded in real time by the gentle computer in day.Temperature programming case passes through program liter
The power of temperature controller control heating heating wire, so that temperature programming case is heated up with certain heating rate（Such as, program is made
After warming box reaches 30 DEG C of initial temperature in advance, 300 DEG C are risen to 1 DEG C/min heating rate.）, heated up in temperature programming case
While due to temperature difference be present, the coal sample in coal sample tank can also be heated up, and coal sample temperature passes through temperature sensor and coal sample
Temperature data acquisition card is acquired to coal sample temperature and is transferred to computer and records, while programmed temperature-rising controller is by journey
Sequence warming box temperature, which is transmitted to computer, to be recorded.Air-channel system is that coal sample supplies fresh gas flow, fresh gas flow in coal sample tank
Analyzed, obtained into gas chromatograph through cool copper pipe, escape pipe and second gas pipeline d after being reacted with coal sample
Analysis result is transferred to computer by connection and recorded.Closed when experiment finishes.Coal can be obtained by the present invention
Quality knots modification, each gas component in coal sample tank gas outlet and volume fraction, coal sample heating curve in sample temperature-rise period.It need to point out
Coal sample temperature-rise period in quality knots modification need to deduct and mass deviation value is obtained by weight correcting be only real coal sample
Quality knots modification, standard test weight is used as double outstanding board F1 levels（100g-1mg）Counterweight is set with, described balance is prior art,
Precise electronic balance Cubis MSU2203S-000-DA, the precise electronic balance Cubis produced such as Sai Duolisi
MSE3203S-000-DA, precise electronic balance Cubis MSA5203S-000-DR（Readability is 1mg, and maximum range divides
Wei not 2.2kg, 3.2kg, 5.2kg）The packing of weighing unit and display unit can be achieved, can be linked and counted by R232 communication interfaces
Calculation machine.The present invention is easy to use, shorten oxidation temperature-raising characteristic curve, quality knots modification and the production of coal sample under temperature programming/
The time of measuring of gas consumption feature, substantially increases operating efficiency, reduces labor intensity, avoids repeated sampling and causes resource
Waste, using a kind of equipment, reduce experimental cost, and due to realizing the oxidation heating spy to coal sample under temperature programming
The synchro measure of linearity curve, quality knots modification and production/gas consumption feature, makes measurement result stability, and error greatly reduces, test
Reliable results, ature of coal amount knots modification can be measured in real time while realizing oxidation of coal heating, there is significant economy and society
Can benefit.
Claims (10)
1. a kind of coal spontaneous combustion characteristic detecting apparatus based on thermogravimetric, it is characterised in that oxygen pressure steel cylinder (1) is through the first gas circuit pipe
Road (a) is connected with gas pre-mixed device (9), nitrogen high-pressure cylinder (5) through the second gas circuit pipeline (b) respectively with the first gas circuit pipeline
(a), gas pre-mixed device (9) connection, gas pre-mixed device are connected through first gas pipeline (c) with air inlet pipe (10), air inlet pipe
It is connected with preheating copper pipe (11), preheating copper pipe (11) is placed in coal sample tank bracket bottom, preheats the coal sample tank bracket below copper pipe
Bottom extends downwardly from the casing of temperature programming case, is placed on the pallet of balance (18), and journey is stretched out at the top of coal sample tank bracket upwards
The casing of sequence warming box, there is the cooling copper pipe being placed in above the casing top of temperature programming case in the top of coal sample tank bracket
(13), preheat and coal sample tank (12) is housed in the coal sample tank bracket above copper pipe, preheating copper pipe (11) and coal sample tank (12) bottom
Air inlet is connected, and the gas outlet on coal sample tank (12) top is connected with cooling copper pipe (13), and cooling copper pipe connects through escape pipe (14)
Second gas pipeline (d), second gas pipeline (d) are connected on gas chromatograph (15), and gone out gas is entered by gas chromatograph
Row analysis, temperature programming case is by casing (24), zone of heating (20), heat-insulation layer (21), programmed temperature-rising controller (22), coal sample temperature
Degrees of data capture card (23) and balance (18) combine the enclosed construction of composition, and casing periphery is enclosed with zone of heating, heating
There is heating wire in layer, zone of heating outer wrap has heat-insulation layer, and heating wire connects with the programmed temperature-rising controller outside casing, program
The power of heating wire in warm-up controller control zone of heating realizes the heating of casing, and coal sample tank is built with temperature sensor
(16), the free end of temperature sensor is stretched out coal sample tank bracket and is connected with coal sample temperature data acquisition card (23), coal sample temperature
Data collecting card passes through temperature sensor (16) samples of coal pulled temperature, programmed temperature-rising controller, coal sample temperature data acquisition card, day
Flat (18), gas chromatograph are connected with computer.
2. the coal spontaneous combustion characteristic detecting apparatus according to claim 1 based on thermogravimetric, it is characterised in that described oxygen is high
It is connected with the first pressure-reducing valve (2), the first pressure maintaining valve (3), first gas between compressed steel bottle (1) and the first gas circuit pipeline (a) in turn
Mass flow controller (4)；Second is connected with turn between described nitrogen high-pressure cylinder (5) and the second gas circuit pipeline (b) to subtract
Pressure valve (6), the second pressure maintaining valve (7), second gas mass flow controller (8).
3. the coal spontaneous combustion characteristic detecting apparatus according to claim 1 based on thermogravimetric, it is characterised in that described coal sample tank
There is the coal sample tank bracket containment vessel (19) mounted in the casing top of temperature programming case pedestal upper end periphery, prevents outer bound pair coal sample tank
The interference of support (17), influences the measurement of quality；Described temperature programming case is provided with chamber door, and coal is mounted and dismounted for opening
Sample tank.
4. the coal spontaneous combustion characteristic detecting apparatus according to claim 1 based on thermogravimetric, it is characterised in that described coal sample tank
Support (17) passes through the position of casing, and perforation is provided with casing, ensures that coal sample tank bracket (17) and casing crossover sites are had time
Gap, it is not in contact.
5. the coal spontaneous combustion characteristic detecting apparatus according to claim 1 based on thermogravimetric, it is characterised in that described coal sample tank
Support is by the bottom-up carrier (26) of preheating copper pipe to link together vertically, the carrier (27) of coal sample tank and cooling
The integrative-structure that the carrier (28) of copper pipe is formed, preheat holding for the carrier of copper pipe, the carrier of coal sample tank and cooling copper pipe
The cross section of carrier is in equilateral triangle.
6. the coal spontaneous combustion characteristic detecting apparatus according to claim 5 based on thermogravimetric, it is characterised in that described positive triangle
The center of shape is annulus, and annulus connects through three supporting sticks respectively with three angles of equilateral triangle.
7. the coal spontaneous combustion characteristic detecting apparatus according to claim 6 based on thermogravimetric, it is characterised in that described coal sample tank
Carrier (27) in the middle part of be embedded with equilateral triangle coal sample tank fixed mount, three sides center of coal sample tank fixed mount is equipped with use
Fixed angles (29) in fixed coal sample tank position, for ensuring that each coal sample tank installation site is consistent, so as to ensure the weight of test
Renaturation.
8. the coal spontaneous combustion characteristic detecting apparatus according to claim 7 based on thermogravimetric, it is characterised in that described fixed angles
(29) it is catch straight up, three paracentral fixed angles (29) that the bottom of coal sample tank is installed on coal sample tank fixed mount are enclosed
Into space in.
9. the coal spontaneous combustion characteristic detecting apparatus according to claim 1 based on thermogravimetric, it is characterised in that described gas is pre-
Mixing device (9) is to be made up of the mixing chamber of gas first (30) of prismatic and the mixing chamber of gas second (31) of prismatic through threaded connection
Demountable structure, the mixing chamber of gas first are to connect and compose prismatic structure, gas first by anterior triangle and rear portion triangle
There is the dividing plate (32) that shape identical longitudinal section is triangle in the rear portion triangle of mixing chamber, dividing plate is inlaid in gas from front to back
In the rear portion triangle of the mixing chamber of body first, front and rear the two of the front and rear sides of dividing plate and the rear portion triangle of the mixing chamber of gas first
There is the first gas channel (33) between the top of side superimposed, the top of dividing plate and the rear portion triangle of the mixing chamber of gas first, every
There are the second gas channel (34), the first gas channel between the bottom of the rear portion triangle of the mixing chamber of following and gas first of plate
Be intersected in the junction of the mixing chamber of gas first and the second mixing chamber with the second gas channel, dividing plate make mixed gas shunt and
The mixing chamber of gas second (31), which confluxes, makes air-flow form disturbance so as to make gas reach more preferable in the mixing chamber of gas second (31)
Premixing effect, according to the size of gas flow, the mixing chamber of gas first (30) is one or more.
10. the coal spontaneous combustion characteristic detecting apparatus according to claim 1 based on thermogravimetric, it is characterised in that described air inlet
It is polyfluortetraethylene pipe to manage (10) and escape pipe (14)；Described heat-insulation layer (21) is shell structure made of mineral wool.
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| CN106404589A (en) * | 2016-09-22 | 2017-02-15 | 安徽理工大学 | Coal oxidation characteristic testing device based on coal and gas cogeneration and testing method thereof |
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| CN110133007B (en) | 2019-04-17 | 2020-01-14 | 中国建材检验认证集团股份有限公司 | Coal consumption on-line metering system |
| CN111024757B (en) * | 2019-12-10 | 2022-11-22 | 山东科技大学 | Method for testing heat production characteristic of coal spontaneous combustion in pure oxidation process |
| CN111999343A (en) * | 2020-09-01 | 2020-11-27 | 中国矿业大学(北京) | Coal spontaneous combustion characteristic parameter measurement experiment platform |
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