CN106018468A - Portable coal sample temperature-control heating experimental facility and method - Google Patents
Portable coal sample temperature-control heating experimental facility and method Download PDFInfo
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- CN106018468A CN106018468A CN201610296848.2A CN201610296848A CN106018468A CN 106018468 A CN106018468 A CN 106018468A CN 201610296848 A CN201610296848 A CN 201610296848A CN 106018468 A CN106018468 A CN 106018468A
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- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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Abstract
The invention discloses a portable coal sample temperature-control heating experimental facility and method. The device comprises a coal sample pot. The coal sample pot contains coal samples to be tested. The outer wall of the coal sample pot is sleeved with a heater, and an upper end cover and a lower end cover are arranged at the two ends of the coal sample pot respectively. The lower end cover is provided with an air inlet, and the upper end cover is provided with an air outlet and a through hole. The periphery of the heater is sleeved with an outer layer heat preservation shell, an air inlet pipe is arranged between the outer layer heat preservation shell and the heater, one end of the air inlet pipe communicates with the air inlet in the lower end cover of the coal sample pot, and the other end of the air inlet pipe communicates with an air pump. One end of the air outlet pipe communicates with the air outlet in the upper end cover of the coal sample pot, the other end of the air outlet pipe communicates with one end of a cooling pipe, and the other end of the cooling pipe communicates with a gas sample collector. A temperature sensor penetrates through the through hole in the upper end cover to be inserted into the coal sample pot. The temperature rising control range is within the room temperature and 500 DEG C. Precise temperature controlling can be achieved at the normal temperature starting temperature rising period, the error is smaller than 1 DEG C, and temperature controlling is precise and accurate. The portable coal sample temperature-control heating experimental facility is small in size, low in weight and convenient to carry.
Description
Technical field:
The present invention relates to mine safety field of engineering technology, be specifically related to a kind of portable coal sample temperature control heating experimental device and side
Method.
Background technology:
Colliery spontaneous combustionof coal is currently to affect Safety of Coal Mine Production and restrict the big important disaster that coal mine work area is exploited smoothly.?
In the element task of its early prevention and treatment and research, it is necessary to measure Marking Gas of Coal Spontaneous Combustion, i.e. measure coal at different temperatures
The each gas componant discharged, for the prediction work of the development degree of coal spontaneous combustion, to ensure the safety in production in colliery.
The current eudiometry typically heating furnace in laboratory to coal spontaneous combustion mark or high-temperature incubator are carried out, is to heat up
Temperature control scope is measured experiment between room temperature+10 DEG C～500 DEG C, is positioned in heating furnace or high-temperature incubator by coal sample tank,
By air pump and pipeline, then gas chromatograph for determination is coordinated to go out the component of spontaneous combustion symbolic gas, but the heating used in this method
Stove or high-temperature incubator are forbidden at cold stage temperature control, and actual precision is 1 DEG C, especially can not accurately control from room temperature intensification
The temperature of step section, and the volume of heating furnace or high-temperature incubator is the biggest, uses restricted, and not readily portable extremely
Colliery scene is tested.
Existing another kind of experimental provision is then to use tubular heater to substitute high-temperature incubator, but the tubular heater of finished product is general
Being provided to high-temperature heating and design, the operating temperature of demarcation, mostly at about 1000 DEG C, occurs in that the most equally and starts to walk at room temperature
Temperature rise period can not the problem of precise control of temperature, this tubular heater general volume higher temperatures calorstat is slightly smaller, but still deposits
In the excessive not readily portable problem of weight, it is not well positioned to meet the use demand of user.
Accordingly, it would be desirable to design a kind of more applicable portable Novel coal sample heating experimental device, to solve above-mentioned problem.
Summary of the invention:
It is an object of the invention to provide a kind of for coal spontaneous combustion symbolic gas measure portable coal sample temperature control heating experimental device and
Method, its liter of control temp scope, between room temperature～500 DEG C, can carry out accurate temperature controlling in the room temperature starting temperature rise period.
For achieving the above object, the present invention is by the following technical solutions:
The one portable coal sample temperature control heating experimental device that the present invention provides, including: coal sample tank, coal sample tank is loaded with to be measured
Coal sample, coal sample tank wall is arranged with heater, in order to heat coal sample tank, is respectively arranged with upper end cover at coal sample tank two ends
And bottom end cover, in order to coal sample tank to be sealed, described bottom end cover offers air inlet, upper end cover offers gas outlet and
One through hole, is arranged with outer layer insulation shell in heater periphery, is provided with air inlet pipe between outer layer insulation shell and heater,
Air inlet pipe extends to coal sample tank bottom, and its one end connects with the air inlet on the bottom end cover of coal sample tank, and the air inlet pipe other end is arranged
In the outside of outer layer insulation shell, connect with air pump；Escape pipe one end connects with the gas outlet on coal sample tank upper end cover, another
End connects with cooling tube one end, and the other end of described cooling tube connects gas sample collector, and temperature sensor is through described on upper end cover
Through hole is inserted in coal sample tank, in order to read the temperature of coal sample to be measured in coal sample tank in real time
Being provided with temperature control line on described heater, described temperature control line connects thermostat, carries out temperature control during in order to heat coal sample tank,
Described temperature sensor external temperature harvester, in order to record the variations in temperature in coal sample tank.
Described air inlet pipe is helical form, and distribution of spiraling outside described heater.
Described cooling tube is helical form, in order to ensure the timely cooling of the high temperature gas flow flowed out in coal sample tank.
It is additionally provided with effusion meter, for controlling the flow of gas between described air pump and air inlet pipe.
Described coal sample tank is cylindrical, uses stainless steel to make, and described upper end cover and bottom end cover are all threadeded with coal sample tank.
Described gas sample collector is micro air pump, and described gas sample collector external gas chromatography, in order to measure gas componant.
Described air inlet pipe is respectively arranged with cutting ferrule, in order to seal with coal sample tank, escape pipe with the junction of coal sample tank.
Above-mentioned portable coal sample temperature control heating experimental device is used to carry out Marking Gas of Coal Spontaneous Combustion method for measuring, concrete steps
As follows:
Step one: open air pump, be energized to heater simultaneously, sends into air by air inlet pipe in coal sample tank, and by adding
Hot device is heated by preset temperature to the air in coal sample tank and air inlet pipe；
Step 2: in heating process, coal sample to be measured self is decomposed when different temperatures, or is occurred chemistry anti-with the air pumped into
Should, discharge gas with various, read the temperature of coal sample in coal sample tank in real time by temperature sensor；
Step 3: reach or level off to set temperature value at the temperature value read, and when temperature value tends towards stability, by giving vent to anger
Manage external gas sample collector to be sampled, then given vent to anger by the gas chromatograph for determination coal sample to be measured release that gas sample collector is external
The composition of body.
Further, in step one, between described air pump and air inlet pipe, it is additionally provided with effusion meter, for controlling gas
Flow.
Further, in step 2, described heater is provided with temperature control line, and described temperature control line connects has thermostat, in order to right
Temperature control is carried out when coal sample tank heats, in order to realize the liter control temp scope of coal sample tank between room temperature～500 DEG C, and described temperature
Degree sensor external temperature harvester, in order to record the variations in temperature of coal sample in coal sample tank.
A kind of portable coal sample temperature control heating experimental device of the present invention and the beneficial effect of method: rise control temp scope in room temperature～
Between 500 DEG C, being capable of accurate temperature controlling in the room temperature starting temperature rise period, error is less than 1 DEG C, and temperature control is accurate；The little weight of volume
Gently, it is simple to carry；Power consumption is little, safe and reliable；Use coal sample tank thermometric and heated for controlling temperature Double-linkage temp measuring method, by coal
Sample tank coal sample temperature matches with heating-up temperature, as the standard judging sampling；Coal sample tank uses stainless steel, it is ensured that heating
During coal sample, tank body does not aoxidizes, coal sample will not be produced catalytic action.
Accompanying drawing illustrates:
Fig. 1 is the structural representation of the present invention portable coal sample temperature control heating experimental device；
Fig. 2 is the top view of upper end cover；
Fig. 3 is the upward view of bottom end cover；
Fig. 4 is the temperature changing curve diagram of heater and coal sample tank wall；
Fig. 5 is that coal sample temperature to be measured rises the curve chart of High variation with coal sample tank wall temperature；
Fig. 6 is that coal sample temperatures approach to be measured is in the temperature changing curve diagram of coal sample tank wall temperature；
1-coal sample tank, 2-upper end cover, 3-bottom end cover, 4-cutting ferrule, 5-air inlet, 6-through hole, 7-gas outlet, 8-heater, 9-
Temperature control line, 10-thermostat, 11-outer layer insulation shell, 12-air inlet pipe, 13-effusion meter, 14-air pump, 15-escape pipe, 16-
Cooling tube, 17-gas sample collector, 18-temperature sensor, 19-Temperature sampler.
Detailed description of the invention:
Below in conjunction with embodiment, the present invention is described in further detail.
According to Fig. 1, a kind of portable coal sample temperature control heating experimental device, including: coal sample tank 1, coal sample tank 1 contains
There are coal sample to be measured, coal sample tank wall to be arranged with heater 8, in order to coal sample tank to be heated, heater 8 are provided with control
Temperature line 9, described temperature control line 9 connects thermostat 10, carries out temperature control during in order to heat coal sample tank 1, in the present embodiment,
Coal sample tank 1 is cylindrical, uses 304 stainless steels to make, and the most threaded at coal sample tank 1 two ends have upper end cover 2 He
Bottom end cover 3, in order to seal coal sample tank 1, as it is shown on figure 3, offer air inlet 5 on described bottom end cover 3, such as Fig. 2
Shown in, upper end cover 2 offers gas outlet 7 and a through hole 6, is arranged with outer layer insulation shell 11 in heater 8 periphery,
Being provided with helical form air inlet pipe 12 between outer layer insulation shell 11 and heater 8, air inlet pipe 12 is spiraled point outside heater 8
Cloth, and extend to coal sample tank 1 bottom, and its one end connects with the air inlet 5 on the bottom end cover 3 of coal sample tank 1, air inlet pipe 12
The other end is arranged on the outside of outer layer insulation shell 11, connects with air pump 14；Escape pipe 15 one end and coal sample tank 1 upper end cover
Gas outlet 7 on 2 connects, and the other end connects with cooling tube 16 one end, and at described air inlet pipe 12 and coal sample tank 1, escape pipe
15 are respectively arranged with cutting ferrule 4 with the junction of coal sample tank 1, are further ensured that the sealing effectiveness of coal sample tank 1, described cooling tube 16
The other end connect gas sample collector 17, described cooling tube 16 be helical form, in order to ensure in coal sample tank 1 High Temperature Gas of outflow
The timely cooling of stream, temperature sensor 18 is inserted in coal sample tank 1 through described through hole 6 on upper end cover 2, in order to read in real time
The temperature of coal sample to be measured in coal sample tank 1, in the present embodiment, thermometric line external temperature harvester 19 is passed through in temperature sensor 18,
In order to record the variations in temperature in coal sample tank 1, and this device overall weight is controllable to only 8.45kg, it is simple to carry to colliery existing
Field is tested, the most applicable.
It is additionally provided with effusion meter 13, for controlling the flow of gas between described air pump 14 and air inlet pipe 12.
Described gas sample collector 17 is micro air pump, and described gas sample collector external gas chromatography, in order to measure gas componant.
Above-mentioned portable coal sample temperature control heating experimental device is used to carry out Marking Gas of Coal Spontaneous Combustion method for measuring, concrete steps
As follows:
Step one: open air pump 14, is energized to heater 8 simultaneously, and preset temperature t pressed by heater 81Carry out to coal sample tank 1
Heating so that the temperature of coal sample tank wall raises along with the heating of heater 8, and then make the to be measured of the internal splendid attire of coal sample tank 1
The temperature of coal sample also increases, and heater 8 is also to the air heating sent in coal sample tank 1 by air inlet pipe 12 simultaneously；
Step 2: in heating process, coal sample to be measured self can be decomposed when different temperatures, or with the air pumped into, chemistry be occurred
Reaction, is discharged gas with various, is read the Current Temperatures t of coal sample in coal sample tank 1 by temperature sensor 18 in real time2；
As shown in Figure 4, when heater 8 temperature is increased to preset temperature, coal sample tank wall also reaches preset temperature, such as Fig. 5
Shown in, the temperature of the coal sample to be measured in coal sample tank 1 raises and slightly lags behind coal sample tank wall, and adds when coal sample temperature to be measured starts
Speed raises, and along with proceeding of heating up, the rising of coal sample temperature to be measured gradually slows down, and finally makes coal sample temperature to be measured unlimited
Level off to the temperature of coal sample tank wall；
Step 3: at the temperature value t read2Reach or level off to set temperature value t1, according to t1=t2Condition or coal sample tank 1
In coal sample temperature t to be measured2When tending towards stability, specifically, when the intensification step pitch of coal sample the most to be measured is less than the temperature accuracy difference of 1 DEG C,
The gas sample collector 17 external by escape pipe 15 is sampled, then passes through the gas chromatograph for determination that gas sample collector 17 is external
Coal sample to be measured discharges the composition of gas, and i.e. can get in temperature is t1Or t2Under coal sample to be measured release each gas componant；
It addition, along with coal sample to be measured self decompose or with the air generation chemical reaction pumped into, coal sample oxidation heat liberation to be measured, this
Time, the temperature of coal sample to be measured even can be higher than coal sample tank wall temperature, is become by the temperature describing coal sample to be measured and coal sample tank wall
Change curve, as shown in Figure 6, it can be seen that each thermal gradient model stage can exist one stabilization time section, coal sample the most to be measured
Temperature curve produces with coal sample tank wall temperature curve and crosses, and when the duration that crosses meets ten seconds, and intersection's temperature gap is less than
In 0.5 DEG C time, now, also meet sampling condition, can be sampled by the gas sample collector 17 that escape pipe 15 is external, then lead to
Cross gas sample collector 17 external gas chromatograph for determination coal sample to be measured and discharge the composition of gas.
In step one, between described air pump 14 and air inlet pipe 12, it is additionally provided with effusion meter 13, for controlling the flow of gas.
In step 2, described heater 8 is provided with temperature control line 9, and described temperature control line 9 connects has thermostat 10, in order to coal
Temperature control is carried out when sample tank 1 heats, between room temperature～500 DEG C and described in order to realize the liter control temp scope of coal sample tank 1
Temperature sensor 18 external temperature harvester 19, in order to record the variations in temperature of coal sample in coal sample tank 1.
Finally should be noted that: above example is only in order to illustrate that technical scheme is not intended to limit, although reference
The present invention has been described in detail by above-described embodiment, and those of ordinary skill in the field are it is understood that still can be to this
Bright detailed description of the invention is modified or equivalent, and without departing from any amendment of spirit and scope of the invention or equivalent
Replacing, it all should be contained in the middle of present claims scope.
Claims (10)
1. a portable coal sample temperature control heating experimental device, it is characterised in that: including: coal sample tank, coal sample tank is loaded with
Coal sample to be measured, coal sample tank wall is arranged with heater, in order to heat coal sample tank, is respectively arranged with at coal sample tank two ends
End cap and bottom end cover, in order to seal coal sample tank, described bottom end cover offers air inlet, upper end cover offers and gives vent to anger
Mouth and a through hole, be arranged with outer layer insulation shell in heater periphery, be provided with air inlet between outer layer insulation shell and heater
Pipe, air inlet pipe extends to coal sample tank bottom, and its one end connects with the air inlet on the bottom end cover of coal sample tank, the air inlet pipe other end
It is arranged on the outside of outer layer insulation shell, connects with air pump；Escape pipe one end connects with the gas outlet on coal sample tank upper end cover,
The other end connects with cooling tube one end, and the other end of described cooling tube connects gas sample collector, and temperature sensor passes on upper end cover
Described through hole is inserted in coal sample tank, in order to read the temperature of coal sample to be measured in coal sample tank in real time.
One the most according to claim 1 portable coal sample temperature control heating experimental device, it is characterised in that: described heating
Being provided with temperature control line on device, described temperature control line connects thermostat, carries out temperature control during in order to heat coal sample tank, and described temperature passes
Sensor external temperature harvester, in order to record the variations in temperature in coal sample tank.
One the most according to claim 1 portable coal sample temperature control heating experimental device, it is characterised in that: described air inlet
Pipe is helical form, and distribution of spiraling outside described heater.
One the most according to claim 1 portable coal sample temperature control heating experimental device, it is characterised in that: described cooling
Pipe is helical form, in order to ensure the timely cooling of the high temperature gas flow flowed out in coal sample tank.
One the most according to claim 1 portable coal sample temperature control heating experimental device, it is characterised in that: at described sky
Effusion meter it is additionally provided with, for controlling the flow of gas between air pump and air inlet pipe.
One the most according to claim 1 portable coal sample temperature control heating experimental device, it is characterised in that: described coal sample
Tank is cylindrical, uses stainless steel to make, and described upper end cover and bottom end cover are all threadeded with coal sample tank.
One the most according to claim 1 portable coal sample temperature control heating experimental device, it is characterised in that: described gas
Sampler is micro air pump, and described gas sample collector external gas chromatography, in order to measure gas componant.
8. use the portable coal sample temperature control heating experimental device described in claim 1 to carry out Marking Gas of Coal Spontaneous Combustion mensuration
Method, it is characterised in that: specifically comprise the following steps that
Step one: open air pump, be energized to heater simultaneously, sends into air by air inlet pipe in coal sample tank, and by adding
Hot device is heated by preset temperature to the air in coal sample tank and air inlet pipe；
Step 2: in heating process, coal sample to be measured self is decomposed when different temperatures, or is occurred chemistry anti-with the air pumped into
Should, discharge gas with various, read the temperature of coal sample in coal sample tank in real time by temperature sensor；
Step 3: reach or level off to set temperature value at the temperature value read, and when temperature value tends towards stability, by giving vent to anger
Manage external gas sample collector to be sampled, then given vent to anger by the gas chromatograph for determination coal sample to be measured release that gas sample collector is external
The composition of body.
Method the most according to claim 8, it is characterised in that: in step one, described air pump and air inlet pipe it
Between be additionally provided with effusion meter, for controlling the flow of gas.
Method the most according to claim 8, it is characterised in that: in step 2, described heater is provided with temperature control line,
Described temperature control line connects thermostat, carries out temperature control, in order to realize the liter control temp of coal sample tank during in order to heat coal sample tank
Scope is between room temperature～500 DEG C, and described temperature sensor external temperature harvester, in order to record the temperature of coal sample in coal sample tank
Change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610296848.2A CN106018468A (en) | 2016-05-06 | 2016-05-06 | Portable coal sample temperature-control heating experimental facility and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610296848.2A CN106018468A (en) | 2016-05-06 | 2016-05-06 | Portable coal sample temperature-control heating experimental facility and method |
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| CN106018468A true CN106018468A (en) | 2016-10-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110208316A (en) * | 2019-05-16 | 2019-09-06 | 华电电力科学研究院有限公司 | A kind of self-ignition of coal pile tendency measurement system and measuring method |
| CN114778622A (en) * | 2022-04-20 | 2022-07-22 | 千年舟新材科技集团股份有限公司 | Panel formaldehyde release detection device |
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