CN206146865U - Temperature programming oxidation of coal experimental apparatus - Google Patents
Temperature programming oxidation of coal experimental apparatus Download PDFInfo
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- CN206146865U CN206146865U CN201621050385.3U CN201621050385U CN206146865U CN 206146865 U CN206146865 U CN 206146865U CN 201621050385 U CN201621050385 U CN 201621050385U CN 206146865 U CN206146865 U CN 206146865U
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- coal sample
- coal
- sample tank
- temperature programming
- heating furnace
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Abstract
The utility model provides a coal sample tank and heating furnace in an organic whole, can realize that the coal sample is loaded and retrieve conveniently that experiment operation is simple, the coal sample is heated evenly, temperature homogeneity is good, flow control is accurate, automatic gas production and the temperature programming oxidation of coal experimental apparatus who diffuses. The device includes coal sample tank and heating furnace, and heating furnace body's upper end and lower extreme are equipped with case lid and case lid down respectively, and coal sample tank sets up in heating furnace furnace, and with heating furnace body fixed connection, coal sample tank's top is equipped with the upper portion end cover, and the bottom is equipped with the lower part end cover, upper portion end cover and lower part end cover are split type structure with coal sample tank, and upper portion end cover and lower part end cover are provided with the coal sample bracket outside all stretching out heating furnace body in the coal sample tank, the coal sample bracket is including being equipped with the layer board of a plurality of through -holes and hollow columnar structure's stay tube, the layer board is located the upper end of stay tube, the lower extreme and the contact of lower part end cover of stay tube.
Description
Technical field
This utility model is related to coal spontaneous combustion experimental apparatus field, and in particular to a kind of temperature programming oxidation of coal experimental provision.
Background technology
Coal spontaneous combustion is extremely complex physical phenomenon, is autoacceleration coal oxidation exothermic process.Wherein, physical change is included
Have the adsorption and desorption of gas, the evaporation of moisture and condensations, conduction of heat, the intensification of coal body, structure loosely etc.；Chemical change bag
There is chemisorbed and chemical reaction containing various active structures in coal surface molecule and oxygen, generate various oxy radicals and generation
Multiple gases, simultaneous heat effect (has heat release and heat absorption).Due to chemical reaction, the macromolecule internal cross-bond of coal occurs
Redistribution, so that the physics of coal, chemical property change, and further affects coal oxygen complex action process.Coal oxygen is answered
Conjunction process and its exothermic character are with temperature, coal mesopore rate and different and different from the surface area of air contact etc..Cause
The spontaneous combustion time and index gas of this coal is difficult to be obtained with emulation by simple calculating, it is necessary to determined by experimentation.
Temperature programming experiment is the common method of the spontaneous combustion time and index gas for measuring coal.But in existing experiment
In, mostly it is to be completed using finished product high temperature oven, Muffle furnace, drying oven etc., coal sample tank and heating furnace are split-type structural, Ji Jiangmei
Sample is placed in the coal sample tank of a constant volume, then coal sample tank is positioned in heating furnace again, and then reconnects air inlet, escape pipe
Line and temperature sensor, its experiment complex operation.On the other hand, heater is not professional customization, poor temperature uniformity, it is difficult to
It is used in combination with chromatograph, optoacoustic spectroscopy, Fourier's infrared gas analyser, realizes flow, the Programmed control of temperature and output
The automatic data collection of gas with diffuse.In addition existing temperature programming experiment it is mostly be for low temperature coal spontaneous combustion, temperature it is low (<200 DEG C),
Due to the extension of research field, such as coal-field fire needs the coal spontaneous combustion characteristic of researching high-temperature state, this traditional coal sample tank liter
Temperature takes gas mode and can greatly be challenged, because after more than 250 DEG C, most rubber-like sealing articles just cannot be used, metal
Hard link is difficult to meet the demand of frequent dismounting again.
The content of the invention
Problem to be solved in the utility model be to provide a kind of coal sample tank and heating furnace in one, realize coal sample and load
Reclaim convenient, the simple temperature programming oxidation of coal experimental provision of experimental implementation.
This utility model realizes that the technical scheme of above-mentioned purpose is：A kind of temperature programming oxidation of coal experimental provision is provided, is wrapped
Coal sample tank and heating furnace are included, in order to the pipe end for reducing coal sample tank radiates, the top and bottom of heating furnace body are respectively equipped with
Case lid and lower case lid, the coal sample tank is arranged in heating furnace burner hearth, is fixedly connected with heating furnace body, and the top of coal sample tank sets
There is a top end cap, bottom is provided with lower end cap, the top end cap and lower end cap and coal sample tank are split-type structural, upper end
It is external that lid and lower end cap stretch out heating-furnace.In order to ensure that coal sample can be filled in the most rational area of burner hearth middle portion temperature
Between, coal sample bracket is provided with coal sample tank, the coal sample bracket includes the supporting plate and hollow columnar structures for being provided with multiple through holes
Support tube, the supporting plate is located at the upper end of support tube, and the lower end of support tube contacts with lower end cap.
The coal sample tank is multiple.
In order to improve the uniformity of in-furnace temperature, spoiler is additionally provided with, the spoiler is arranged around coal sample tank surrounding
In burner hearth, spoiler improves eroding velocity of the hot-air to coal sample tank, increases the convection transfer rate of gas and coal sample tank,
Improve the being heated evenly property of coal sample tank.
Further to improve charge air flow uniformity, it is also possible to arrange multiple layer metal silk screen above supporting plate.
Can be provided with the top of coal sample and flow grid, the grid that flows is multiple layer metal mesh structure, so may be used
It is further ensured that the uniformity that air-flow flows in coal sample.
Circulated air dividing plate and circulating fan are provided with burner hearth, the circulated air dividing plate is arranged at circulating fan lower section, will
Hot blast space is divided into air intake region and return air region, and circulated air enters burner hearth by the mistake air holes plate of side, then by another
The mistake air holes plate of side flows out burner hearth, and circulated air high-speed motion in burner hearth washes away coal sample tank and spoiler.
The uniformity that coal sample is heated has close relationship with coal sample tank diameter, and the bigger temperature unevenness of coal sample tank diameter is more
Seriously, by calculating discovery when coal sample tank diameter is less than 50mm, in experiment is interval, section inhomogeneities are less than 2 DEG C for coal sample.
If diameter is too small, wall affects to increase on air motion, and coal capacity is greatly reduced, it is difficult to meet gas collecting analysis need
Ask.In order to ensure the uniformity of temperature in coal sample tank, the preferred diameter range of this utility model coal sample tank is 30～50mm.
Air outlet, return air inlet and center in burner hearth is respectively provided with three thermocouples, using burner hearth center thermocouple as stove
Bore temperature controls benchmark, by adjusting circulating fan rotating speed, it is ensured that the temperature difference of three thermocouples is in 3 DEG C.
The top of coal sample pipe is provided with gas outlet, and the gas outlet is connected with two way solenoid valves, is arranged on leads to all the way
On gas analysis instrument passage, for gas collecting, it is arranged on diffuses passage all the way.Diffuse the electromagnetic valve of passage and lead to gas
The electromagnetic valve of analytical tool passage is chain each other, the same time, smooth the way, closes all the way.Can set by program or manually
Put electromagnetic valve to open at what time, how long is unlatching.
The strong and weak electricity relevant device such as controller, solid-state relay, liquid crystal touch screen, button, air switch is installed on into electricity
In device control chamber；The gas flows such as mass flow controller, electromagnetic valve control testing equipment is installed in pipeline connecting box.
The utility model has the advantages that：
1st, coal sample tank and heating furnace are integral type structure, it is possible to achieve coal sample quickly filling and recovery, simple to operate, coal sample
The setting of bracket and spoiler effectively raises being heated evenly property of coal sample.
2nd, coal sample tank, heating system are concentrated on into one, makes facility compact, attractive in appearance, be easy to operation, while increased device
Air-tightness, improve flow-control degree of accuracy.This utility model maximum operation (service) temperature is up to 600 DEG C.
3rd, the electromagnetic valve for diffusing passage and the electromagnetic valve for leading to gas analysis instrument passage are chain each other, the same time, and one
Road is unimpeded, closes all the way.Electromagnetic valve can be arranged by program or manually to open at what time, how long is unlatching, can
Realize automatic gas production and diffuse.
4th, this utility model can realize temperature programming pattern and follow temperature controlling mode.Also by real time record temperature, flow,
Electric current, electric power information, are stored in controller, and configure USB interface, realize the real-time Communication for Power with computer.
Description of the drawings
Fig. 1 is temperature programming oxidation of coal experimental provision schematic diagram.
Fig. 2 is the A-A sectional views of Fig. 1.
Fig. 3 is the B-B sectional views of Fig. 2.
Fig. 4 is the C-C sectional views of Fig. 2.
Fig. 5 is the I partial enlarged drawings of Fig. 1.
Fig. 6 coal sample carrier structure schematic diagrams.
Fig. 7 is temperature programming oxidation of coal experimental provision system schematic.
Labelling in figure：1- electric appliance control boxes, 2- heating furnaces, 3- upper box lids, case lid under 4-, 5- tops end cap, 6- coal sample tanks,
7- flows grid, and 8- crosses air holes plate, 9- lower end caps, 10- coal sample brackets, 101- supporting plates, 102- support tubes, 11- thermocouple sets
Pipe, 12- burner hearths, 13- thermocouples, 14- spoilers, 15- circulating fans, 16- circulated air dividing plates, 17- heating rods, 18- pipelines connect
Connect case, 19- electromagnetic valves one, 20- electromagnetic valves two
Specific embodiment
This utility model is described in further detail with reference to the accompanying drawings and examples：
A kind of temperature programming oxidation of coal experimental provision as shown in Figure 1, including coal sample tank 6, heating furnace 2, heating system, gas
Body input and output channel system and flow temperature measurement control system.The coal sample tank 6 is multiple, in order to reduce coal sample tank 6
Pipe end radiates, and the top and bottom of heating furnace 2 are respectively equipped with upper box lid 3 and lower case lid 4, and case lid is to change up pass structure soon, just
Often during work, case lid is closed；When coal sample is filled, case lid is opened.
Coal sample tank 6 is arranged in heating furnace 2, is fixedly connected with heating furnace 2, and the top of coal sample tank 6 is provided with top end cap 5,
Bottom is provided with lower end cap 9, and the top end cap 5 and the lower end cap 9 and coal sample tank 6 are split-type structural, the dress of coal sample
Fill out and need only to operate the two end caps with recovery, without dismantling to other pipelines and wiring.
As shown in fig. 6, in order to ensure that coal sample can be filled in the most rational interval of the middle portion temperature of burner hearth 12, in coal sample tank 6
Coal sample bracket 10 is inside provided with, the coal sample bracket 10 is propped up including the supporting plate 101 and hollow columnar structures for being provided with multiple through holes
Stay tube 102, the supporting plate 101 is located at the upper end of support tube 102, and the lower end of support tube 102 contacts with lower end cap 9.To enter one
Step improves charge air flow uniformity, it is also possible in the top arranging multiplayer metal gauze of supporting plate 101.It is provided with the top of coal sample
Grid 7 is flowed, the grid 7 that flows is multiple layer metal mesh structure, can so be further ensured that what air-flow flowed in coal sample
Uniformity.
As shown in figure 5, multilayer sleeve joint includes successively support tube 102, thermocouple sheath 11, thermocouple 13.Thermocouple
Between sleeve pipe 11 and lower end cap 9 be air-tightness welding, thermocouple sheath 11 go deep into coal sample termination be closed structure, leakage Prevention
Gas.Thermocouple 13 is fixed in thermocouple sheath 11 by thermocouple locking nut.13 diameters of thermocouple≤1mm, thermocouple set
11 external diameters of pipe≤3mm.
The uniformity that coal sample is heated has close relationship, the bigger temperature unevenness of the diameter of coal sample tank 6 with the diameter of coal sample tank 6
It is more serious, found when the diameter of coal sample tank 6 is less than 50mm by calculating, in experiment is interval, section inhomogeneities are less than 2 to coal sample
℃.If diameter is too small, wall affects to increase on air motion, and coal capacity is greatly reduced, it is difficult to meet gas collecting analysis
Demand.In order to ensure the uniformity of temperature in coal sample tank 6, the preferred diameter range of this utility model coal sample tank 6 is 30～50mm.
As shown in Fig. 2 being provided with air holes plate 8 and spoiler 14 in burner hearth 12, the spoiler 14 surrounds coal sample tank 6 four
It is arranged in week in burner hearth 12, spoiler 14 improves eroding velocity of the hot-air to coal sample tank 6, increases gas with coal sample tank 6
Convection transfer rate, improves the being heated evenly property of coal sample tank 6.
Such as Fig. 3, shown in Fig. 4, in burner hearth 12 circulated air dividing plate 16 and circulating fan 15, the circulated air dividing plate 16 are provided with
The lower section of circulating fan 15 is arranged at, hot blast space is divided into into air intake region and return air region, the mistake air holes that circulated air passes through side
Plate 8 enters burner hearth 12, then flows out burner hearth 12, circulated air high-speed motion in burner hearth 12, punching by the mistake air holes plate 8 of opposite side
Brush coal sample tank 6 and spoiler 14.
Preheating coil pipe is set in burner hearth 12, and cold air flows into again coal sample tank 6 after preheating, it is ensured that into coal sample tank 6
Air themperature and coal sample temperature be close to.Air outlet, return air inlet and center in burner hearth 12 is respectively provided with three thermocouples 13, with
Burner hearth center thermocouple 13 controls benchmark as fire box temperature, by adjusting the rotating speed of circulating fan 15, it is ensured that three thermocouples 13
The temperature difference in 3 DEG C.
The strong and weak electricity relevant device such as controller, solid-state relay, liquid crystal touch screen, button, air switch is installed on into electricity
In device control chamber 1；The gas flows such as mass flow controller, electromagnetic valve control testing equipment is installed on into pipeline connecting box 18
It is interior.
The upper box lid 3 and lower case lid 4 of temperature programming oxidation of coal experimental provision are opened, thermocouple snap joint is unclamped, is turned on
Top end cap 5 and lower end cap 9, empty existing coal sample.The position of adjustment coal sample bracket 10, tightens lower end cap 9, from coal sample tank
6 top filling coal sample, then tightens the top end cap 5 of coal sample tank 6, connects thermocouple snap joint, and closing top case lid is with
Portion's case lid.
Gas can be provided by full-automatic air pump, it is also possible to be provided by compressed air gas cylinder.Send into temperature programming case
Air pressure is maintained in the range of 0.3～0.5MPa, and by mass flowmenter charge flow rate is controlled.Gas first passes through preheating plate
After pipe preheating, coal sample tank 6 is entered back into, pass sequentially through supporting plate 101, coal sample, flow grid 7, then discharged from coal sample tank 6.
As shown in fig. 7, the top of coal sample pipe 6 is provided with gas outlet, the gas outlet is connected with two way solenoid valves, arranges
It is electromagnetic valve 1 leading on gas analysis instrument passage, for gas collecting, is arranged on and diffuses passage for electromagnetic valve 2 20.
The electromagnetic valve 2 20 for diffusing passage and the electromagnetic valve 1 for leading to gas analysis instrument passage are chain each other, the same time, all the way
It is unimpeded, close all the way.Electromagnetic valve can be arranged by program or manually to open at what time, how long is unlatching.Determine gas
Body is to be diffused, or in gas analysis instrument.
Heating rod 17 is thermal source, and for whole system heat is provided, and circulating fan 15 is by the heat transfer of heating rod 17 to stove
Thorax 12.Circulating air passed through air holes plate into burner hearth 12, then passed through air holes plate and flows out burner hearth 12, and circulated air is in burner hearth 12
Interior high-speed motion, washes away coal sample tank 6 and spoiler 14.
Option program heating mode or follow temperature controlling mode according to demand, temperature programming pattern with furnace temperature to control benchmark,
Setting heating curve and speed.Heating mode is followed, on the basis of the temperature detected by thermocouple 13 in coal sample tank 6, is protected all the time
Card furnace temperature is higher by fixed numbers than coal sample temperature.The setting of temperature, flow, valve state etc. can be in liquid crystal touch screen with display
On complete.The information such as temperature, flow, electric current, electrical power will be stored in controller by real time record, by USB interface and electricity
Brain real-time Communication for Power, it is also possible to copied out data with USB flash disk.
Claims (9)
1. a kind of temperature programming oxidation of coal experimental provision, including coal sample tank and heating furnace, the top and bottom point of heating furnace body
It is not provided with upper box lid and lower case lid, it is characterised in that：The coal sample tank is arranged in heating furnace burner hearth, is fixed with heating furnace body
Connection, the top of coal sample tank is provided with top end cap, and bottom is provided with lower end cap, the top end cap and lower end cap and coal sample tank
For split-type structural, it is external that top end cap and lower end cap stretch out heating-furnace, and coal sample bracket is provided with coal sample tank, described
Coal sample bracket includes being provided with the supporting plate of multiple through holes and the support tube of hollow columnar structures, and the supporting plate is located at the upper of support tube
End, the lower end of support tube contacts with lower end cap.
2. temperature programming oxidation of coal experimental provision according to claim 1, it is characterised in that：The coal sample tank is multiple.
3. temperature programming oxidation of coal experimental provision according to claim 1, it is characterised in that：Also include spoiler, institute
State spoiler to be arranged in burner hearth around coal sample tank surrounding.
4. temperature programming oxidation of coal experimental provision according to claim 1, it is characterised in that：The supporting plate top is provided with
Multiple layer metal silk screen.
5. temperature programming oxidation of coal experimental provision according to claim 1, it is characterised in that：It is provided with the coal sample tank
Grid is flowed, the grid that flows is multiple layer metal mesh structure, flows the top that grid is located at coal sample.
6. according to the arbitrary described temperature programming oxidation of coal experimental provision of claim 1 to 5, it is characterised in that：In the burner hearth
Be provided with circulated air dividing plate and circulating fan, the circulated air dividing plate is arranged at circulating fan lower section, by hot blast space be divided into into
Wind region and return air region.
7. temperature programming oxidation of coal experimental provision according to claim 6, it is characterised in that：Coal sample tank diameter range is 30
～50mm.
8. temperature programming oxidation of coal experimental provision according to claim 7, it is characterised in that：The air outlet of burner hearth, return air
Kou He centers are respectively arranged with thermocouple.
9. temperature programming oxidation of coal experimental provision according to claim 1, it is characterised in that：The top of the coal sample pipe sets
There is gas outlet, the gas outlet is connected with two way solenoid valves, is arranged on leads on gas analysis instrument passage all the way, is used for
Gas collecting, is arranged on diffuses passage all the way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621050385.3U CN206146865U (en) | 2016-09-12 | 2016-09-12 | Temperature programming oxidation of coal experimental apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621050385.3U CN206146865U (en) | 2016-09-12 | 2016-09-12 | Temperature programming oxidation of coal experimental apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN206146865U true CN206146865U (en) | 2017-05-03 |
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ID=58619591
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621050385.3U Expired - Fee Related CN206146865U (en) | 2016-09-12 | 2016-09-12 | Temperature programming oxidation of coal experimental apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106370696A (en) * | 2016-09-12 | 2017-02-01 | 西安科技大学 | Temperature programmed coal oxidation experimental facility |
-
2016
- 2016-09-12 CN CN201621050385.3U patent/CN206146865U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106370696A (en) * | 2016-09-12 | 2017-02-01 | 西安科技大学 | Temperature programmed coal oxidation experimental facility |
| CN106370696B (en) * | 2016-09-12 | 2023-10-31 | 西安科技大学 | Temperature programming coal oxidation experimental device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170503 Termination date: 20190912 |
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| CF01 | Termination of patent right due to non-payment of annual fee |