CN102002382A - Miniature high-pressure reactor experiment device for direct coal liquefaction and experiment method thereof - Google Patents
Miniature high-pressure reactor experiment device for direct coal liquefaction and experiment method thereof Download PDFInfo
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- CN102002382A CN102002382A CN2010105484898A CN201010548489A CN102002382A CN 102002382 A CN102002382 A CN 102002382A CN 2010105484898 A CN2010105484898 A CN 2010105484898A CN 201010548489 A CN201010548489 A CN 201010548489A CN 102002382 A CN102002382 A CN 102002382A
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Abstract
The invention relates to a miniature high-pressure reactor experiment device for direct coal liquefaction and an experiment method thereof. The device comprises a miniature high-pressure reactor, a support and a salt bath furnace, wherein the miniature high-pressure reactor comprises a miniature high-pressure reactor body, a high-pressure reactor cover and an agitating system, and the volume of the miniature high-pressure reactor is from 100ml to 200ml; the miniature high-pressure reactor is fixedly suspended on the support through the high-pressure reactor cover; the salt bath furnace is located below the miniature high-pressure reactor and is used for indirectly heating the miniature high-pressure reactor body by heating fused salt through an electric heating furnace tube, and the salt bath furnace is arranged on an elevating platform. The invention comprehensively considers the accuracy parameters of a direct coal liquefaction intermittent high-pressure reactor experiment in a laboratory capable of rapidly heating, such as volume of the high-pressure reactor, reaction heating rate, temperature control and the like. Compared with the prior art, the invention associates the accuracy of experiment data to the heating rate together for the first time and has high accuracy and simple operation.
Description
Technical field
The present invention relates to the technical field of DCL/Direct coal liquefaction, particularly a kind of high-pressure mini reactor experimental installation and experimental technique thereof that is used for DCL/Direct coal liquefaction is to realize and can be rapidly heated.
Background technology
World's oil price, oil consumption sharply rise and the consumption of oily resource forces energy industry to consider to replace oil-fired substitute.Coal is one of hydrocarbon resource the abundantest on the earth, and coal can change into liquid fuel by hydrogenation reaction.DCL/Direct coal liquefaction be coal, catalyzer, solvent under high-temperature and high-pressure conditions, in reaction, carry out the process that hydrogenation changes liquid fuel and other chemical into.Along with the development of direct coal liquefaction technology, the direct coal liquefaction technology of a new generation with reaction conditions relax more, liquid product yield is higher is feature.
The exploitation of a series of large-scale new technology of preparing is inseparable with laboratory scale fundamental research.At present, the intermittent type autoclave is the important means of laboratory study DCL/Direct coal liquefaction.The important way of laboratory study gelatin liquefaction reaction is the reaction conditions of DCL/Direct coal liquefaction industry demonstration unit as far as possible, comprise: temperature of reaction, pressure, reaction mass etc., make that the research of intermittent type autoclave is more meaningful, we can say that the design of intermittent type autoclave directly has influence on the quality of DCL/Direct coal liquefaction new technology of preparing exploitation, but, do not appear in the newspapers as yet for the design studies of autoclave.
The DCL/Direct coal liquefaction autoclave is used in colleges and universities and the scientific research institutions usually at present, all be the external products of introducing of the 1970's, or it is imitated by domestic manufacturer, only can satisfy the basic need of DCL/Direct coal liquefaction laboratory study, the common volume of these products is big, intensification is slow, rise to temperature of reaction reaction and carried out major part, differ greatly with the response characteristic of DCL/Direct coal liquefaction continuous apparatus; The autoclave that has is in order to reach the purpose that is rapidly heated, with the autoclave volume become very little, yet, the DCL/Direct coal liquefaction reaction is very harsh for the specification of quality of gas-liquid-solid three-phase, too small autoclave volume, solid-liquid phase materials consumption will be reduced, the precision of analysis of liquiefied product will be influenced.Rational DCL/Direct coal liquefaction industry demonstration unit at present can satisfy the reaction under high pressure kettle test device that precision of analysis requires again and be still waiting exploitation.
Summary of the invention
Purpose of the present invention is exactly in order to overcome above-mentioned the deficiencies in the prior art, thereby a kind of high-pressure mini reactor experimental installation and the experimental technique thereof that is used for DCL/Direct coal liquefaction that provides, can be rapidly heated, the reaction of step better simulation direct liquefaction continuous apparatus, with satisfy lab setup rationally DCL/Direct coal liquefaction industry demonstration unit response characteristic, guarantee the product analysis requirement of accuracy as a result again, improve the function singleness of existing autoclave, the defective that quality is lower.
For achieving the above object, the invention provides a kind of high-pressure mini reactor experimental installation that is used for DCL/Direct coal liquefaction, this device comprises: high-pressure mini reactor, support and salt bath furnace;
Described high-pressure mini reactor is cylindric, comprising: high-pressure mini reactor kettle, autoclave kettle cover and stirring system, the volume of this high-pressure mini reactor are 100ml～200ml;
Described high-pressure mini reactor is fixed on the support by the autoclave kettle cover is unsettled;
Described salt bath furnace is positioned at the below of high-pressure mini reactor, be used for by electrically heated boiler tube heating fused salt indirectly to the heating of high-pressure mini reactor kettle, and this salt bath furnace is arranged on the lifting table.
As a kind of improvement of technique scheme, also be provided with thermocouple well on the described autoclave kettle, be used to plug thermopair, the contact of this thermocouple well is arranged on below in the high-pressure mini reactor.
As another improvement of technique scheme, the electrically heated boiler tube in the described salt bath furnace also comprises a heating controller, and this heating controller adopts intelligence temperature controller or PLC programmable logic controller.
As another improvement of technique scheme, the contact of the thermocouple well of described autoclave kettle inside is positioned at top, the bottom 2～5mm of autoclave inside center.
Another kind as technique scheme improves, and also is provided with thermopair in the described salt bath furnace, and the thermopair contact of described salt bath furnace is apart from heating rod 10～20mm, to guarantee to measure the accuracy of fused salt medial temperature.
As also a kind of improvement of technique scheme, described stirring system adopts adjustable motor or the magnetic force driving of rotating speed.The lower edge of the stirring rake of described stirring system by down, is higher than thermopair contact 1～3mm as far as possible.
As another improvement of technique scheme, described lifting table adopts hydraulic elevator platform, and this hydraulic elevator platform adopts electricity to drive or be manual.
As another improvement of technique scheme, described salt bath furnace is square, and volume is 8～10L.
For realizing another above-mentioned purpose, the invention provides a kind of high-pressure mini reactor experimental technique that is used for DCL/Direct coal liquefaction, this method may further comprise the steps:
1) coal dust, hydrogen supply dissolvent and the catalyzer of particle diameter less than 74 μ m added in the high-pressure mini reactor by proportioning; Regulate the stirring rake height, height is as the criterion fully stirring material; The high-pressure mini reactor is fixed on the kettle cover, tightens;
The volume of described high-pressure mini reactor is 100ml～200ml, and the kettle cover of this high-pressure mini reactor is fixed on the support; Below the high-pressure mini reactor, be provided with salt bath furnace by a lifting table, this salt bath furnace is used for by electrically heated boiler tube heating fused salt indirectly to the heating of high-pressure mini reactor kettle;
2) open the inlet mouth of high-pressure mini reactor, slowly 3MPa nitrogen is charged into the high-pressure mini reactor, emit by high-pressure mini reactor air outlet again, once replace, and in kind replace 2 times again;
Slowly 3MPa hydrogen is charged into the high-pressure mini reactor, replace 3 times;
At last, slowly the high-pressure mini reactor is charged to elevated pressures 5～10MPa with high pressure hydrogen;
3) open salt bath furnace heating, salt bath is warming up to 350～470 ℃ after;
Open the stirring water coolant on the high-pressure mini reactor, open stirring rake;
The rising lifting table, make just submergence high-pressure mini reactor kettle of salt bath rapidly, regulate the salt bath furnace temperature simultaneously, in the reaction times, keep this temperature, so that high-pressure mini reactor internal temperature is constant, guarantee that the gaseous tension in the high-pressure mini reactor is 15～25MPa;
4) fall lifting table rapidly, salt bath hightails high-pressure mini reactor kettle, so that high-pressure mini reactor internal temperature reduces;
When high-pressure mini reactor internal temperature is reduced to below 150 ℃, close the stirring water coolant, close stirring;
After the high-pressure mini reactor is cooled to room temperature, get the portion gas sample from high-pressure mini reactor air outlet and carry out gasometry, then slowly emit remaining gas in the high-pressure mini reactor, take off high-pressure mini reactor kettle, get wherein material and analyze.
As a kind of preferred, the circulation heavy oil that described hydrogen supply dissolvent adopts gelatin liquefaction self to produce; Described catalyzer adopts Fe-series catalyst; Described coal dust: solvent: the weight part ratio of catalyzer is: 4: 5: 0.1;
The volume of described high-pressure mini reactor is 180ml;
Described high pressure hydrogen slowly is charged to 8MPa with the high-pressure mini reactor, more than the stable 30min, reduces situation to observe high-pressure mini reactor internal gas pressure, guarantees that high-pressure mini reactor gas tightness is good;
Described salt bath is warming up to 450 ℃ with the heat-up rate of 10 ℃/min;
The mixing speed of described stirring rake is 400rpm.
The invention has the advantages that the accuracy parameter of the laboratory DCL/Direct coal liquefaction intermittent type autoclave experiment that can be rapidly heated is taken all factors into consideration in this invention, as autoclave volume, reaction temperature rise rate, temperature control etc.Compare with original technology, the present invention links together the accuracy and the temperature rise rate of experimental data first, has accuracy height, characteristics such as simple to operate.
The present invention has following distinguishing feature:
1, the volume of autoclave has certain requirement, promptly satisfy the required thermal load that is rapidly heated, be enough to guarantee the requirement of direct liquefaction again to experimental precision, all there is more accurate requirement the position of autoclave internal heat galvanic couple and stirring: the volume of autoclave is 100～200ml, be cylindric, internal heat galvanic couple contact should be at 2～5mm above the autoclave inside center bottom, and stirring rake bottommost blade should be higher than the thermopair contact, and is higher than centre bottom 5～8mm;
2, adopt novel salt bath furnace heating, safe and reliable;
3, the scantlings of the structure of salt bath furnace has certain requirement, and guarantee safe and reliable: salt bath furnace is square, and volume is 8～10L, and salt bath furnace thermopair contact is apart from heating rod 10～20mm, to guarantee to measure the accuracy of fused salt medial temperature;
4, the salt bath furnace heating makes autoclave heat by the lifting of bottom elevation platform, and is safe and convenient to use;
5, utilize autoclave can finish all processes of direct liquefaction reaction;
6, high-pressure mini reactor kettle, stirring system, heater system three parts have constituted whole experiment device.
Description of drawings
Fig. 1 is the structural representation that is used for the high-pressure mini reactor experimental installation of DCL/Direct coal liquefaction of the present invention.
The accompanying drawing sign
1, autoclave agitator motor 2, cooling water pipeline 3, reactor inlet mouth
4, support 5, reactor thermocouple well 6, autoclave
7, agitating vane 8, salt bath furnace thermopair 9, heating rod
10, salt bath furnace 11, lifting table 12, reactor air outlet
13, tensimeter 14, autoclave kettle cover 15, stirring rake
Embodiment
Below in conjunction with accompanying drawing and specifically execute example, the present invention is described in further detail.
As shown in Figure 1, experimental installation of the present invention is made of autoclave kettle, stirring system, heater system three parts, the volume of autoclave 6 can be selected according to the actual requirements, should be controlled between 100～200ml, high pressure in the reactor is by original pressure and the decision of autoclave internal temperature, and the solid material addition of the gas-liquid in the reactor is according to the requirement decision of direct liquefaction reaction.Thermocouple well 5 is fixed on the autoclave kettle, the contact in still below, to guarantee that the contact is among reaction mass.Agitating vane 7 highly can be regulated according to the amount of adding materials, and stirring rake 15 is fixed on the kettle cover 14.During use, at first autoclave 6 is unloaded from autoclave kettle cover 14, autoclave kettle cover 14 fixedly is seated on the support 4, adds an amount of material in proportion, autoclave 6 is fixed on the kettle cover 14 tightens again.Open reactor inlet mouth 3, charge into autoclave 6, discharge by autoclave air outlet 12 again, so replace 3 times with low-pressure nitrogen; Change low pressure hydrogen again, last with same step displacement 3 times, charge into high pressure hydrogen to required pressure, pressure can be demonstrated by tensimeter 13.
Open the salt bath furnace heating, heating rod 9 heating salt baths are to certain temperature, and salt bath 10 temperature can be illustrated by thermopair 8.Open and stir water coolant 2, open autoclave agitator motor 1, and thermopair is inserted in the thermocouple well 5, start lifting table 11 rapidly, rising salt bath furnace position makes reactor kettle 6 just in time submerge in the salt bath 10.Like this, the autoclave internal temperature raises rapidly, by regulating the salt bath furnace temperature, makes that the reactor internal temperature can be constant; After setting-up time is carried out in reaction, reduce lifting table 11 rapidly, make salt bath furnace 10 hightail reactor kettle 6, make its cooling, to finish reaction.Reaction is got the gas sample from pneumatic outlet 12 after finishing, and unloads reactor kettle 6, gets the product sample and analyzes.
Based on above-mentioned device, the experimental technique of the laboratory DCL/Direct coal liquefaction that is rapidly heated of the present invention comprises following concrete steps:
The first, with coal dust (crossing 80 mesh sieves), solvent (the circulation heavy oil that gelatin liquefaction self produces), catalyzer (Fe-series catalyst) is pressed coal dust 4.0g, solvent 5.0g, and catalyzer 0.1g proportioning adds in the autoclave, reactor volume 180ml.Regulate the stirring rake height, be as the criterion with abundant stirring material.Autoclave is fixed on the kettle cover, tightens.
The second, use 3MPa nitrogen replacement high-pressure reactor 3 times, use the 3MPa hydrogen exchange again 3 times, slowly autoclave is charged to 10MPa with high pressure hydrogen at last, stablize 30min, observe pressure and reduce situation, guarantee that the reactor stopping property is good.
The 3rd, open salt bath furnace heating, with salt bath with (for example 10 ℃/min) be warming up to 350～470 ℃ (preferred 450 ℃) of certain heat-up rates.Open the stirring water coolant, open and stir, set mixing speed 400rpm, thermopair is inserted in the autoclave thermocouple well.The rising lifting table, make just submergence autoclave kettle of salt bath rapidly, observing the autoclave internal temperature changes, the autoclave internal temperature in 2～3min from room temperature rise to rapidly the temperature that experiment sets (this heating-up time length with need the warm eventually relevant of heating, close with the continuous residence time of liquefying plant coal slurry in preheating oven, the heating-up time of common autoclave reaches 50～120min, with actual grave fault, a situation arises can not well to simulate the actual liquefaction reaction), regulate the salt bath furnace temperature simultaneously, make the autoclave internal temperature constant as far as possible.(gaseous tension of the reactor under this temperature is the pressure of liquefaction reaction, is generally 15～25MPa, is generally 20MPa, and this pressure is looked initial gas pressure and temperature of reaction and got.)
The 4th, keep this temperature certain hour (0.5～120min), unload lifting table rapidly, make salt bath hightail the autoclave kettle, the autoclave internal temperature is reduced.When the autoclave internal temperature is reduced to below 150 ℃, close the stirring water coolant, close stirring.After autoclave is cooled to room temperature, get the portion gas sample from the autoclave air outlet and carry out gasometry, then slowly emit remaining gas in the autoclave, take off the autoclave kettle, get wherein material and analyze.
The coal oil mixture proportioning is coal dust 4.0g, solvent 6.0g, and catalyzer 0.15g, the goal-setting temperature is 450 ℃, and reaction time is 40min, and all the other steps are identical with embodiment 1.
The coal oil mixture proportioning is coal dust 5.0g, solvent 6.0g, and catalyzer 0.15g, the goal-setting temperature is 455 ℃, and reaction time is 60min, and all the other steps are identical with embodiment 1.
In concrete the enforcement, open the high-pressure mini reactor,, load an amount of raw material, tighten high pressure flange, with the autoclave good seal, to guarantee under reaction pressure, not having gas leakage according to the technical requirements of DCL/Direct coal liquefaction; With low-pressure nitrogen, hydrogen purge reactive system, then, fill reactor to certain pressure with gas at normal temperatures; Opening autoclave stirs; In advance salt bath furnace is risen to the temperature of setting, rise elevator rapidly, salt bath furnace is risen, so that salt bath floods whole autoclave, make autoclave be raised to certain temperature, temperature, pressure in the autoclave all increase; After keeping this temperature certain hour, put down elevator rapidly, autoclave is lowered the temperature rapidly, this experimental technique is finished.
Described autoclave volume should be based on following consideration: guarantee the accuracy of reaction product in the subsequent analysis process, the volume of autoclave must not be less than 100ml, again because the requirement that is rapidly heated, volume must not be greater than 200ml, high pressure in the autoclave is by original pressure and temperature of reaction decision, internal diffusion and external diffusion that the rotating speed that stirs requires to eliminate reactive system are as the criterion, and the big volumetrical salt bath furnace of thermal recovery that adds of reactor heats.
Described salt bath furnace reaches the purpose of indirect heating autoclave by electrically heated boiler tube heating fused salt, and the heating controller of electrically heated boiler tube is selected for use and satisfied intelligence temperature controller or the PLC programmable logic controller that temperature programming requires.
The loadings of fused salt will satisfy following requirement in the described salt bath furnace: fused salt can flood whole autoclave kettle when melting, the temperature that guarantees fused salt in the salt bath furnace has certain homogeneity, guarantee thermal capacitance be wide enough so that autoclave the internal temperature fast rise and can constant temperature.
The contact position of the inner thermocouple well of described autoclave should be near autoclave inside center bottom, so that record the true temperature of material in the autoclave, stir the lower edge in the still as far as possible by down, play enough stirring actions, can not contact with thermocouple well again.
Described autoclave stirs reliable motor or magnetic force driving, requires its rotating speed adjustable, and described salt bath furnace places on the hydraulic elevator platform, and hydraulic elevator platform can straight up and down adopt electricity driving or manual.
It should be noted last that above embodiment is only unrestricted in order to technical scheme of the present invention to be described.Although the present invention is had been described in detail with reference to embodiment, those of ordinary skill in the art is to be understood that, technical scheme of the present invention is made amendment or is equal to replacement, do not break away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (10)
1. high-pressure mini reactor experimental installation that is used for DCL/Direct coal liquefaction, this device comprises: high-pressure mini reactor, support and salt bath furnace;
Described high-pressure mini reactor is cylindric, comprising: high-pressure mini reactor kettle, autoclave kettle cover and stirring system, the volume of this high-pressure mini reactor are 100ml～200ml;
Described high-pressure mini reactor is fixed on the support by the autoclave kettle cover is unsettled;
Described salt bath furnace is positioned at the below of high-pressure mini reactor, be used for by electrically heated boiler tube heating fused salt indirectly to the heating of high-pressure mini reactor kettle, and this salt bath furnace is arranged on the lifting table.
2. the high-pressure mini reactor experimental installation that is used for DCL/Direct coal liquefaction according to claim 1, it is characterized in that, also be provided with thermocouple well on the described autoclave kettle, be used to plug thermopair, the contact of this thermocouple well is arranged on below in the high-pressure mini reactor.
3. the high-pressure mini reactor experimental installation that is used for DCL/Direct coal liquefaction according to claim 1, it is characterized in that, electrically heated boiler tube in the described salt bath furnace also comprises a heating controller, and this heating controller adopts intelligence temperature controller or PLC programmable logic controller.
4. the high-pressure mini reactor experimental installation that is used for DCL/Direct coal liquefaction according to claim 1 is characterized in that, the contact of the thermocouple well of described autoclave kettle inside is positioned at top, the bottom 2～5mm of autoclave inside center.
5. the high-pressure mini reactor experimental installation that is used for DCL/Direct coal liquefaction according to claim 1 is characterized in that also be provided with thermopair in the described salt bath furnace, the thermopair contact of described salt bath furnace is apart from heating rod 10～20mm.
6. the high-pressure mini reactor experimental installation that is used for DCL/Direct coal liquefaction according to claim 1 is characterized in that, described stirring system adopts adjustable motor or the magnetic force driving of rotating speed; The lower edge of the stirring rake of described stirring system by down, is higher than thermopair contact 1～3mm as far as possible.
7. the high-pressure mini reactor experimental installation that is used for DCL/Direct coal liquefaction according to claim 1 is characterized in that, described lifting table adopts hydraulic elevator platform, and this hydraulic elevator platform adopts electricity to drive or be manual.
8. the high-pressure mini reactor experimental installation that is used for DCL/Direct coal liquefaction according to claim 1 is characterized in that described salt bath furnace is square, and volume is 8～10L.
9. high-pressure mini reactor experimental technique that is used for DCL/Direct coal liquefaction, this method may further comprise the steps:
1) coal dust, hydrogen supply dissolvent and the catalyzer of particle diameter less than 74 μ m added in the high-pressure mini reactor by proportioning; Regulate the stirring rake height, height is as the criterion fully stirring material; The high-pressure mini reactor is fixed on the kettle cover, tightens;
The volume of described high-pressure mini reactor is 100ml～200ml, and the kettle cover of this high-pressure mini reactor is fixed on the support; Below the high-pressure mini reactor, be provided with salt bath furnace by a lifting table, this salt bath furnace is used for by electrically heated boiler tube heating fused salt indirectly to the heating of high-pressure mini reactor kettle;
2) open the inlet mouth of high-pressure mini reactor, slowly 3MPa nitrogen is charged into the high-pressure mini reactor, emit by high-pressure mini reactor air outlet again, once replace, and in kind replace 2 times again;
Slowly 3MPa hydrogen is charged into the high-pressure mini reactor, replace 3 times;
At last, slowly the high-pressure mini reactor is charged to elevated pressures 5～10MPa with high pressure hydrogen;
3) open salt bath furnace heating, salt bath is warming up to 350～470 ℃ after;
Open the stirring water coolant on the high-pressure mini reactor, open stirring rake;
The rising lifting table, make just submergence high-pressure mini reactor kettle of salt bath rapidly, regulate the salt bath furnace temperature simultaneously, in the reaction times, keep this temperature, so that high-pressure mini reactor internal temperature is constant, guarantee that the gaseous tension in the high-pressure mini reactor is 15～25MPa;
4) fall lifting table rapidly, salt bath hightails high-pressure mini reactor kettle, so that high-pressure mini reactor internal temperature reduces;
When high-pressure mini reactor internal temperature is reduced to below 150 ℃, close the stirring water coolant, close stirring;
After the high-pressure mini reactor is cooled to room temperature, get the portion gas sample from high-pressure mini reactor air outlet and carry out gasometry, then slowly emit remaining gas in the high-pressure mini reactor, take off high-pressure mini reactor kettle, get wherein material and analyze.
10. the high-pressure mini reactor experimental technique that is used for DCL/Direct coal liquefaction according to claim 9 is characterized in that, the circulation heavy oil that described hydrogen supply dissolvent adopts gelatin liquefaction self to produce; Described catalyzer adopts Fe-series catalyst; Described coal dust: solvent: the weight part ratio of catalyzer is: 4: 5: 0.1;
The volume of described high-pressure mini reactor is 180ml;
Described high pressure hydrogen slowly is charged to 8MPa with the high-pressure mini reactor, more than the stable 30min;
Described salt bath is warming up to 450 ℃ with the heat-up rate of 10 ℃/min;
The mixing speed of described stirring rake is 400rpm.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104764637A (en) * | 2015-03-12 | 2015-07-08 | 国家电网公司 | Coal sample stir-mixing and drying device |
| CN105092418A (en) * | 2015-09-22 | 2015-11-25 | 中国石油大学(华东) | Determining device for viscosity in heavy oil thermal reaction and determining method thereof |
| CN107885098A (en) * | 2017-11-03 | 2018-04-06 | 北京东方仿真软件技术有限公司 | Unit process simulation control subsystem and analogue system, emulation mode including it |
| CN110180461A (en) * | 2019-04-04 | 2019-08-30 | 西安交通大学 | A kind of coal tar high-temperature high-voltage reaction experimental provision |
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| CN101608129A (en) * | 2008-06-19 | 2009-12-23 | 汉能科技有限公司 | A kind of reactor and application thereof that is used for DCL/Direct coal liquefaction |
| CN101619225A (en) * | 2008-06-30 | 2010-01-06 | 汉能科技有限公司 | Reaction kettle for direct coal liquefaction and application thereof |
| CN201912917U (en) * | 2010-11-17 | 2011-08-03 | 煤炭科学研究总院 | Micro high pressure reaction kettle experimental facility for directly liquefying coal |
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| CN104764637A (en) * | 2015-03-12 | 2015-07-08 | 国家电网公司 | Coal sample stir-mixing and drying device |
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| CN110180461A (en) * | 2019-04-04 | 2019-08-30 | 西安交通大学 | A kind of coal tar high-temperature high-voltage reaction experimental provision |
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| CN102002382B (en) | 2013-09-18 |
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