CN203909007U - Test device for underground coal gasification mechanism - Google Patents
Test device for underground coal gasification mechanism Download PDFInfo
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- CN203909007U CN203909007U CN201420225036.5U CN201420225036U CN203909007U CN 203909007 U CN203909007 U CN 203909007U CN 201420225036 U CN201420225036 U CN 201420225036U CN 203909007 U CN203909007 U CN 203909007U
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- gasification
- gasification furnace
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Abstract
The utility model relates to a test device for underground coal gasification mechanism. The test device comprises a gasifier for testing, wherein a hoisting frame is fixedly arranged in the way of stretching over the gasifier; a hanger is arranged at the upper end of the hoisting frame; the gasifier comprises a horizontally arranged gasification reaction tube; a refractory layer is arranged around the cylindrical side wall of the reaction tube; an electric heater is arranged in the refractory layer; an insulating layer is arranged around the refractory layer; a furnace body housing is arranged on the outer side of the insulating layer; a plurality of monitoring component test tubes are longitudinally arranged at the top of the furnace body housing side by side and extend to the gasification reaction tube from the furnace roof; a thermocouple for measuring the temperature in the gasification reaction tube and a gas sampling channel are arranged in each test tube. The test device has the benefits that the operation is easy, the temperature of the gasification reaction tube can be controlled in a segmented manner, the hoisting frame fixed beside the gasifier enables the furnace body to flexibly reverse, the centralized data sampling is adopted, the structure of the furnace body is simplified and the test cost is greatly reduced.
Description
Technical field
The utility model belongs to coal underground gasification technology field, particularly a kind of underground coal gasification(UCG) mechanism testing device.
Background technology
The course of reaction of underground coal gasification(UCG) is carried out underground completely, in order to choose the movement of suitable technological parameter, research flame face in actual production process, and the impact of Coal rank on underground gasification result, need one can simulate coal at underground unburnt reactor.Lao Lunsi National Laboratory of the U.S. and China Mining University's underground coal gasification(UCG) center all once last century the eighties set up underground gasification testing table, can observe the variation of temperature field, pressure field in underground gasification process, but because testing table size is very large, (the former is 10*1*1, the latter is 6.8*0.85*0.2, the m of unit
3), once test comparatively labor intensive material resources, experimental period is longer, is not too applicable to the experiment that some steps are simple, need to repeatedly carry out, not require testing table size.Therefore, urgently research and develop one and be convenient to load and unload raw material, high temperature resistant, can simulate seam inclination, small size coal underground gasification testing table easy and simple to handle, for carrying out the Basic Experiment Study of underground coal gasification(UCG).
Summary of the invention
The purpose of this utility model is to propose a kind of underground coal gasification(UCG) mechanism testing device, body of heater is reversed flexibly at the other fixing hoisting frame of gasification furnace by one, adopts intensive data sampling, has simplified the structure of body of heater, has greatly saved testing expenses.
To achieve these goals, the technical solution of the utility model is: a kind of underground coal gasification(UCG) mechanism testing device, comprise test gasification furnace, be fixedly installed hoisting frame across gasification furnace, hoisting frame upper end is provided with suspender, wherein, described gasification furnace comprises horizontally disposed gasification reaction pipe, be provided with flame retardant coating around reaction tube cylindrical sidewall, in flame retardant coating, be provided with electric heater, be provided with heat-insulation layer around flame retardant coating, body of heater shell in heat-insulation layer outside, multiple monitoring assembly testing tubes are longitudinally arranged side by side on the top of body of heater shell, described testing tube extends to gasification reaction pipe from furnace roof always, in testing tube, be provided with thermopair and the gas sampling passage of measuring temperature in gasification reaction pipe, described gasification reaction pipe is connected with respectively extension tube at body of heater shell two ends, on described extension tube circumference, be provided with air admission hole or venthole, the outer face of described extension tube is provided with ring flange, on ring flange, be fixedly installed quartz glass view window and burning torch.
Scheme is further: described body of heater shell is to be formed by connecting by the steel plate bolt of upper and lower two semi-circular cross-section, flame retardant coating is to be formed by connecting by the refractory brick bolt of upper and lower two semi-circular cross-section, heat-insulation layer is filled in the space between steel shell and flame retardant coating by heat-preservation cotton, is welded with annulus articulates for suspender in body of heater shell front top.
Scheme is further: be provided with a hole at described extension tube circumference every 90 °, wherein, on three holes of the left and right sides and top, be respectively air admission hole or venthole, below hole place safety valve is installed.
Scheme is further: the electric heater arranging in described flame retardant coating is divided into three sections, and each section separately power supply realizes three bringing-up sections.
Scheme is further: described hoisting frame comprises furred ceiling, support and base three parts, described furred ceiling is positioned at the top of frame, become up-narrow and down-wide trapezoidal shape with Plate Welding, the suspender that a 500 ~ 800Kg is installed in the middle of described furred ceiling, suspender can articulate with gasification furnace front top annulus; Described support is made up of stainless-steel pipe welding in gasification furnace both sides, described support is up-narrow and down-wide trapezoidal shape, the minor face center of support is connected with one end of the hypotenuse of described trapezoidal furred ceiling respectively, between described gasification furnace two side stands, connect a stay pipe, stay pipe passes the tail end bottom of gasification furnace as the turning axle of gasification furnace; In the time that suspender hooks the lifting of gasification furnace front top annulus, gasification furnace can stay pipe centered by 90-degree rotation, described base is made up of the steel plate of two bendings, described steel plate first with described frame bottom welding, then welding beam between steel plate, links together two steel plates.
The beneficial effects of the utility model are: easy operating, temperature that can segmentation control gasification reaction pipe, the other fixing hoisting frame of gasification furnace reverses body of heater flexibly for simulating different inclination angle, coal seam, the sampling of employing intensive data, simplify the structure of body of heater and established test procedure, greatly saved testing expenses.
Below in conjunction with drawings and Examples, the utility model is described in detail.
Brief description of the drawings
Fig. 1 is the utility model test unit front schematic view;
Fig. 2 is the utility model test unit side schematic view;
Fig. 3 is the utility model test unit gasification furnace structure sectional view;
Fig. 4 is that the utility model is monitoring assembly testing tube enlarged drawing;
Fig. 5 is the utility model gasification furnace 90-degree rotation test unit schematic diagram.
Embodiment
A kind of underground coal gasification(UCG) mechanism testing device, as shown in Figures 1 to 5, described test unit comprises test gasification furnace 1, be fixedly installed hoisting frame 2 across gasification furnace, hoisting frame upper end is provided with suspender 3, wherein, described gasification furnace comprises horizontally disposed gasification reaction pipe 1-1, be provided with flame retardant coating 1-2 around reaction tube cylindrical sidewall, in flame retardant coating, be provided with electric heater 1-3, be provided with heat-insulation layer 1-4 around flame retardant coating, body of heater shell 1-5 in heat-insulation layer outside, multiple monitoring assembly testing tubes 4 are longitudinally arranged side by side on the top of body of heater shell, described testing tube extends to gasification reaction pipe from furnace roof always, in testing tube, be provided with the thermopair 4-1 and gas sampling passage 4-2 and the channel outlet 4-3 that measure temperature in gasification reaction pipe, described gasification reaction pipe is connected with respectively extension tube 1-6 at body of heater shell two ends, on described extension tube circumference, be provided with air admission hole or venthole, the outer face of described extension tube is provided with ring flange 5, on ring flange, be fixedly installed quartz glass view window 5-1 and burning torch 5-2.
In embodiment: described body of heater shell is to be formed by connecting by the steel plate bolt of upper and lower two semi-circular cross-section, flame retardant coating is to be formed by connecting by the refractory brick bolt of upper and lower two semi-circular cross-section, heat-insulation layer is filled in the space between steel shell and flame retardant coating by heat-preservation cotton, is welded with annulus 1-6 articulates for suspender in body of heater shell front top.
In embodiment: be provided with a hole at described extension tube circumference every 90 °, wherein, on three holes of the left and right sides and top, be respectively air admission hole or venthole, below hole place safety valve is installed.
In embodiment: the electric heater arranging in described flame retardant coating is divided into three sections, each section separately power supply realizes three bringing-up sections.
In embodiment: described hoisting frame comprises furred ceiling 2-1, support 2-2 and base 2-3 tri-parts, described furred ceiling is positioned at the top of frame, become up-narrow and down-wide trapezoidal shape with Plate Welding, the suspender 3 that a 500 ~ 800Kg is installed in the middle of described furred ceiling, suspender can articulate with gasification furnace front top annulus; Described support is made up of stainless-steel pipe welding in gasification furnace both sides, described support is up-narrow and down-wide trapezoidal shape, the minor face center of support is connected with one end of the hypotenuse of described trapezoidal furred ceiling respectively, between described gasification furnace two side stands, connect a stay pipe 6, stay pipe passes the tail end bottom of gasification furnace as the turning axle of gasification furnace; In the time that suspender hooks the lifting of gasification furnace front top annulus, gasification furnace can stay pipe centered by 90-degree rotation, described base is made up of the steel plate of two bendings, described steel plate first with described frame bottom welding, then welding beam between steel plate, links together two steel plates.In frame, be fixed with control operation dish 7, operation board is controlled supporting portfire, steam generator, cleaning system and data acquisition system (DAS) simultaneously.
In the above-described embodiments: the steel shell material of described gasification furnace is Q235, thickness 3mm, diameter 634mm; The central reaction pipe range 1700mm of described gasification furnace, caliber φ 102*3mm, effective length is 1300mm, both sides extend cold junction pipe range 200mm, longitudinally be arranged side by side 8 monitoring assembly testing tubes on the top of described body of heater shell, carried out process parameter measurement, the spacing between them is 200mm.
The ring flange at the two ends of described gasification furnace is that two identical ring flanges are connected with the effective bolt of gasification reaction, the opposite side of each ring flange is one section of common stainless steel pipe, the opposite side of described common stainless steel pipe is the quartz glass view window fixing with flange, the surrounding of described common stainless steel pipe has a hole every 90 °, the left and right sides and above three holes on weld respectively one section of stainless-steel tube, supplied gas output and input, below hole place a safety valve is installed; On the ring flange of described and central reaction Guan Xianglian, two electrodes and oil gun are set, for electric ignition and gasoline igniting.
Described flame retardant coating is divided into multistage, all arranges heating wire in every section of flame retardant coating, and every section of heating wire is controlled separately by the temperature control system of configuration, center reaction tube is carried out to multistage heats simultaneously or heating separately, and can set different heating rates.
Described hoisting frame base is made up of the steel plate of two bendings, and described steel plate first welds with described frame bottom, and then welding beam between steel plate, links together two steel plates.
Described hoisting frame can change the inclination angle of gasification furnace.Suspender on hoisting frame can articulate with the small circle ring on the anterior top of gasification furnace, starts suspender, and gasification furnace front end is subject to suspender traction, and rear end is fixed on the turning axle of stainless-steel tube, gasification furnace just can rotate around turning axle, and the anglec of rotation is 0 ° ~ 90 °, for simulating seam inclination.
The data acquisition system (DAS) of described monitoring assembly testing tube comprises multiple thermocouple temperature transmitter, pressure unit, on-line chromatograph, Connection Block and the data acquisition equipment for measuring center reaction tube temperature, pressure and gas composition, described thermocouple temperature transmitter and pressure unit are arranged on Connection Block, and on-line chromatograph is connected with the air hatch on Connection Block by flexible pipe.
As shown in Figure 4, the Connection Block of described monitoring assembly testing tube is made up of heat resisting pipe, heat-resisting rod iron, wedge and threeway, the process parameter measurement eyelet welding of Duan Yu center, the bottom gasification reaction tube of described heat resisting pipe connects, and top is positioned at the steel shell top of gasification furnace; Described heat-resisting rod iron is inserted in central reaction pipe through heat resisting pipe, and in described heat-resisting rod iron, along axis boring, hole depth approaches the length of rod iron, and described boring is used for placing thermopair; Described wedge center drilling, is arranged on the top of Connection Block, the gap between described heat resisting pipe and the rod iron of sealing; Described threeway one end and described heat resisting pipe weld, described weld between steel shell and wedge, in all the other two interfaces of described threeway, an interface setting pressure transmitter, an interface is air hatch.
The test method of above-mentioned testing table, its step comprises installation gas channel, fills out coal, igniting and gasification Four processes:
Step 1: gas channel is installed.It is that tube wall surrounding is full of to the stainless-steel tube horizontal positioned of aperture to the bottom of described central reaction pipe that gas channel is installed, make vaporized chemical centered by described central reaction pipe, then be diffused in surrounding coal seam the gas channel of simulated field coal underground gasifying furnace;
Step 2: fill out coal.Fill out suspender that coal process need first utilize hoisting frame by described gasification furnace around 10 ~ 30 ° of described turning axle upsets, then utilize slope to complete and fill out coal under the effect of coal grain self gravitation;
Step 3: igniting.Ignition process comprises electric ignition, grease gun igniting and three kinds of methods of external heat spontaneous combustion.Described ignition method is first inflammable firewood resistance wire to be wound in cylindric, then after soaking with diesel oil, with sheet asbestos, described firewood is wrapped up again, and two of described resistance wire is connected with the electrode on described flange, resistance wire between described electrode and described firewood puts magnetic bowl, avoid described resistance wire to contact with described steel reaction tube, finally will on two described electrodes, connect 220V alternating current, described resistance wire, due to short circuit heating diesel pilot and firewood, is realized electric ignition; Described grease gun igniting is the heating wire preheating central reaction pipe first utilizing in oil gun one side flame retardant coating, in the time that temperature reaches gasoline burning-point, controls oil gun injected petrol, then gasoline combustion, the coal seam of igniting; The ignition method of described external heat spontaneous combustion is to continue to pass into oxygen enrichment in described central reaction pipe, and with the heating wire preheating coal seam in the distolateral flame retardant coating of air inlet, makes coal seam vigorous oxidation and spontaneous combustion.
Step 4: gasification.Described gasification, can simulate forward and the reverse gasification in different angle coal seam.Make gasification furnace there is the inclination angle of 0 ~ 90 ° by the suspender of described hoisting frame, the coal seam of the different angle of simulated field; Then pass into the vaporized chemical such as oxygen enrichment and water vapor to flame range one side-inlet of described gasification furnace, simulation forward gasification; After a period of time, the entrance of described vaporized chemical is moved to the opposite side of described gasification furnace, analogous reverse gasification; In described gasification, oxygen-rich concentration is 20% ~ 80%, and oxygen enrichment flow is 3 ~ 15L/min, and the flow of water vapor is 10 ~ 50 mL/min.
One concrete taking the just reverse gasification of Wulanchabu League of Inner Mongolia brown coal oxygen enrichment as example.
Step 1: unload lower furnace body front and rear part flange, gas channel is installed.Gas channel is the stainless-steel tube that a root canal wall surrounding is full of aperture, the bottom by its horizontal positioned to central reaction pipe in stove, and it can make vaporized chemical centered by central reaction pipe, be diffused in surrounding coal seam, the gas channel of simulated field coal underground gasifying furnace; Step 2: rear portion flange is installed, is used loop wheel machine to adjust ° left and right, body of heater inclination angle to 45, the ut after breaking into pieces (diameter 5cm) is loaded in stove; Step 3: electrical igniter is installed.After inflammable firewood is soaked with diesel oil, be wound in resistance wire cylindric, then with sheet asbestos by described firewood parcel.Two of resistance wire is connected with the electrode on flange, when connection, between electrode and resistance wire, puts magnetic bowl, avoid resistance wire to contact with steel reaction tube.Lighter is put into the anterior coal cinder of body of heater, and with the electrode contact on electroprobe and the flange of multimeter, the resistance of measurement point firearm, if the non-vanishing proof of resistance does not have short circuit; Step 4: front flange is installed, 8 thermopairs are inserted on the Connection Block of body of heater top, tighten fixing.Connecting tube, couples together the stainless-steel tube on the flange of front and rear part and admission gear and gas extractor.Use loop wheel machine body of heater angular setting to be arrived to the seam inclination that needs simulation; Step 5: check whether screw, pipe fitting are tightened, and carry out cold test everywhere.Open air intake valve, whether stablely observe pressure gauge reading, use foam water to check whether pipe connector place leaks gas; Tune-up data acquisition system, checks that whether data acquisition software, each sensor, instrument be working properly; Step 6: cold test is lighted a fire after having debugged equipment.Open air inlet and the valve of giving vent to anger, pass into 30% oxygen-rich gasifying agent.To on flange, on outside two electrodes, connect 220V alternating current, in lighter, resistance wire, due to short circuit heating diesel pilot and firewood, is realized electric ignition; Step 7: use temperature, pressure in thermopair, pressure unit monitoring gasification to change.Get once gas sample every 10 points, and record acquisition time, use gas chromatographic analysis gas composition.In the time that the 3rd thermocouple monitoring data displays temperature of body of heater afterbody reached more than 600 DEG C, illustrate that flame face has moved to body of heater approximately 2/3rds places, close terminal valve, using former gas outlet as air intake opening, former air intake opening, as gas outlet, changes airintake direction, and pilot flame workplace is from gasification channel igniting side direction gas injection side shifting, be that flame face moves against air current flow direction, carry out reverse gasification test.In above-mentioned gasification, oxygen-rich concentration is 20% ~ 80%, and oxygen enrichment flow is 3 ~ 15L/min, and the flow of water vapor is 10 ~ 50 mL/min; Step 8: when monitoring flame face and moving to body of heater afterbody, stop air inlet, unload cinder after body of heater is cooling, pull down thermopair and gas channel, with loop wheel machine, testing table is set level, finally testing table is cleaned out.
Claims (5)
1. a underground coal gasification(UCG) mechanism testing device, comprise test gasification furnace, be fixedly installed hoisting frame across gasification furnace, hoisting frame upper end is provided with suspender, it is characterized in that, described gasification furnace comprises horizontally disposed gasification reaction pipe, be provided with flame retardant coating around reaction tube cylindrical sidewall, in flame retardant coating, be provided with electric heater, be provided with heat-insulation layer around flame retardant coating, body of heater shell in heat-insulation layer outside, multiple monitoring assembly testing tubes are longitudinally arranged side by side on the top of body of heater shell, described testing tube extends to gasification reaction pipe from furnace roof always, in testing tube, be provided with thermopair and the gas sampling passage of measuring temperature in gasification reaction pipe, described gasification reaction pipe is connected with respectively extension tube at body of heater shell two ends, on described extension tube circumference, be provided with air admission hole or venthole, the outer face of described extension tube is provided with ring flange, on ring flange, be fixedly installed quartz glass view window and burning torch.
2. a kind of underground coal gasification(UCG) mechanism testing device according to claim 1, it is characterized in that, described body of heater shell is to be formed by connecting by the steel plate bolt of upper and lower two semi-circular cross-section, flame retardant coating is to be formed by connecting by the refractory brick bolt of upper and lower two semi-circular cross-section, heat-insulation layer is filled in the space between steel shell and flame retardant coating by heat-preservation cotton, is welded with annulus articulates for suspender in body of heater shell front top.
3. a kind of underground coal gasification(UCG) mechanism testing device according to claim 1, it is characterized in that, be provided with a hole at described extension tube circumference every 90 °, wherein, on three holes of the left and right sides and top, be respectively air admission hole or venthole, below hole place safety valve is installed.
4. a kind of underground coal gasification(UCG) mechanism testing device according to claim 1, is characterized in that, the electric heater arranging in described flame retardant coating is divided into three sections, and each section separately power supply realizes three bringing-up sections.
5. a kind of underground coal gasification(UCG) mechanism testing device according to claim 1, it is characterized in that, described hoisting frame comprises furred ceiling, support and base three parts, described furred ceiling is positioned at the top of frame, become up-narrow and down-wide trapezoidal shape with Plate Welding, the suspender that a 500 ~ 800Kg is installed in the middle of described furred ceiling, suspender can articulate with gasification furnace front top annulus; Described support is made up of stainless-steel pipe welding in gasification furnace both sides, described support is up-narrow and down-wide trapezoidal shape, the minor face center of support is connected with one end of the hypotenuse of described trapezoidal furred ceiling respectively, between described gasification furnace two side stands, connect a stay pipe, stay pipe passes the tail end bottom of gasification furnace as the turning axle of gasification furnace; In the time that suspender hooks the lifting of gasification furnace front top annulus, gasification furnace can stay pipe centered by 90-degree rotation, described base is made up of the steel plate of two bendings, described steel plate first with described frame bottom welding, then welding beam between steel plate, links together two steel plates.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420225036.5U CN203909007U (en) | 2014-05-05 | 2014-05-05 | Test device for underground coal gasification mechanism |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420225036.5U CN203909007U (en) | 2014-05-05 | 2014-05-05 | Test device for underground coal gasification mechanism |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104457252A (en) * | 2014-12-02 | 2015-03-25 | 中国矿业大学 | Multifunctional underground coal gasification experimental furnace |
| CN106950247A (en) * | 2017-05-08 | 2017-07-14 | 山东科技大学 | A kind of underground coal gasification(UCG) overlying strata are unidirectionally heated experimental system for simulating and method |
| CN107152267A (en) * | 2017-06-26 | 2017-09-12 | 山东科技大学 | A kind of experimental rig and method for simulating coal underground gasification in situ |
| CN111852434A (en) * | 2020-07-31 | 2020-10-30 | 中国矿业大学 | Physical simulation experiment device and method for underground coal gasification at any angle |
| CN113090243A (en) * | 2020-01-08 | 2021-07-09 | 中国石油天然气股份有限公司 | Coal underground gasification simulation experiment system |
| CN114412432A (en) * | 2021-12-28 | 2022-04-29 | 中国矿业大学 | Coal underground gasification on-way sampling simulation experiment system and method |
-
2014
- 2014-05-05 CN CN201420225036.5U patent/CN203909007U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104457252A (en) * | 2014-12-02 | 2015-03-25 | 中国矿业大学 | Multifunctional underground coal gasification experimental furnace |
| CN104457252B (en) * | 2014-12-02 | 2016-05-04 | 中国矿业大学 | A kind of multi-functional coal underground gasification experimental furnace |
| CN106950247A (en) * | 2017-05-08 | 2017-07-14 | 山东科技大学 | A kind of underground coal gasification(UCG) overlying strata are unidirectionally heated experimental system for simulating and method |
| CN106950247B (en) * | 2017-05-08 | 2019-06-11 | 山东科技大学 | A kind of underground coal gasification(UCG) overlying strata are unidirectionally by thermal simulation experimental method |
| CN107152267A (en) * | 2017-06-26 | 2017-09-12 | 山东科技大学 | A kind of experimental rig and method for simulating coal underground gasification in situ |
| CN113090243A (en) * | 2020-01-08 | 2021-07-09 | 中国石油天然气股份有限公司 | Coal underground gasification simulation experiment system |
| CN113090243B (en) * | 2020-01-08 | 2023-05-02 | 中国石油天然气股份有限公司 | Underground coal gasification simulation experiment system |
| CN111852434A (en) * | 2020-07-31 | 2020-10-30 | 中国矿业大学 | Physical simulation experiment device and method for underground coal gasification at any angle |
| CN114412432A (en) * | 2021-12-28 | 2022-04-29 | 中国矿业大学 | Coal underground gasification on-way sampling simulation experiment system and method |
| CN114412432B (en) * | 2021-12-28 | 2024-02-09 | 中国矿业大学 | Underground coal gasification along-path sampling simulation experiment system and method |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |