CN105132026B - A kind of crushed coal pressurized-gasification furnace nitrogen purging device and method - Google Patents
A kind of crushed coal pressurized-gasification furnace nitrogen purging device and method Download PDFInfo
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- CN105132026B CN105132026B CN201410230385.0A CN201410230385A CN105132026B CN 105132026 B CN105132026 B CN 105132026B CN 201410230385 A CN201410230385 A CN 201410230385A CN 105132026 B CN105132026 B CN 105132026B
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Abstract
The present invention provides a kind of crushed coal pressurized-gasification furnace nitrogen purging devices, the device includes the common air pipeline (1) being connected to the gasifying agent mixing tube of crushed coal pressurized-gasification furnace and the nitrogen purge line (2) that is connected to the common air pipeline (1), and the nitrogen purge line (2) is disposed with nitrogen check valve (21), nitrogen gate valve (22) and nitrogen blind plate (23) by the flow direction of nitrogen.Additionally provide the method that nitrogen purging is carried out to crushed coal pressurized-gasification furnace and its pipeline and auxiliary facility using the device.
Description
Technical field
The present invention relates to a kind of blow devices, and in particular to a kind of dress carrying out nitrogen purging to crushed coal pressurized-gasification furnace
It sets, and the method that nitrogen purging is carried out to gasification furnace and its pipeline and auxiliary facility using the device.
Background technology
Research tendency based on current coal gasification process technology and Recent Advances improve vapor pressure, utilize lignite inferior
It is development trend to carry out crushed coal pressure gasifying.The reason is that, the raising of gasifier operation pressure, is conducive to methane in raw gas
It generates, to reduce the processing capacity and equipment scale, the load for reducing the synthesis of resulting device methane of downstream unit, greatlys save
The energy consumption of whole device improves efficient energy conversion.
Domestic and international crushed coal pressurized-gasification furnace design operation pressure is generally in 3.0MPa or less at present.The present inventor is in gasification furnace
When type selects, the characteristic of lignite coal and the compositing characteristic of Artificial Natural Gas are fully taken into account, effective ingredient is synthesizing methane gas,
The operating pressure of gasification furnace is improved by 3.0MPa to 4.0MPa, and increases gasification furnace volume.Gasification furnace pressure-raising and furnace body increase
After big, following benefit is directly brought：First, improving single stove production capacity, coal feeding amount is increased.By to internal cloth coal mode
It optimizes, expands the volume of gasification furnace and coaling facilities coal lock, improve the efficiency and production capacity of gasification furnace.Second, behaviour
The raising for making pressure improves the production quantity of active princlple methane.Methane content is increased to by 8% or so in gasification
12% or more, so that a methane-generated quantity has been reached 48% of final products or more.Third, with the raising of pressure,
Enough power is provided for downstream purification, methanation, compression conveying, makes downstream purification and synthesis device scale down, more
It is compact；Meanwhile greatly reducing the investment of downstream unit.Generally, the raising of gasification furnace pressure improves the gasification efficiency of furnace
And the utilization of feed coal is horizontal, to energy-saving significant.
It uses lignite inferior to gasify with crushed coal pressurized-gasification furnace under 4.0MPa pressure, still belongs to first in world's scope
Secondary, gasify in addition furnace volume and height increase, bed distribution and reactivity in gasification furnace have its corresponding feature.Therefore it visits
Operational administrative system, the driving and parking barometric gradient management and control system that rope and foundation are adapted therewith, understand fully the reaction under specific operation
Model establishes best process control parameter, and then ensures the macrocyclic operational mode of safety and stability, is the new class for running management and control
Topic.
The above-mentioned lignite inferior that the present inventor uses belong to low heat value, high-moisture, thermal stability level Four coal, typical number
According to for：Mar36.9%, TS+628.7%, low heat valve 3000kcal/kg or so, feature show as thermal stability it is very poor,
Mechanicalness is low.Easy fragmentation, easy spontaneous combustion in external storage；Enter furnace gasization easily to burst in the high moisture content atmosphere of high temperature in the process, from
And bed disorder pressure difference is caused to increase, and be easy to take out of from gasification outlet of still with coal gas, clog downstream equipment.
It is attributed to the above feature of lignite inferior, it is necessary to periodic cleaning gasification furnace and in relation to residual in pipeline and corollary equipment
The coal dust deposited.However, after gasification furnace parking pressure release, burning zone and gasification layer easily resume combustion in stove；It is residual in stove after gasification furnace emptying
There are the coal dusts in equipment because of the features such as its water content is higher, thermal stability is very poor and mechanicalness is low, in gasification furnace easily certainly
Combustion, this brings great security risk to equipment and maintenance, prune job.
Therefore, it is still necessary to research and develop a kind of safe and efficient method or apparatus by gasification furnace and in relation to the coal in pipeline at present
Powder is removed, so that it is guaranteed that plant maintenance work is smoothed out.
Invention content
Therefore, it is an object of the invention to the effective means for overcoming the problems, such as to lack purging gasification furnace in the prior art, carries
Nitrogen purging is carried out to gasification furnace for a kind of device carrying out nitrogen purging to crushed coal pressurized-gasification furnace, and using the device
Method.Described device and method safety, effectively, can not only remove remaining coal dust in gasification furnace and related pipeline, can also be herein
Coal dust resume combustion or spontaneous combustion are prevented in the process, to ensure the safety of plant maintenance work, are particularly suitable for the pressurization of 4.0Mpa broken coals
Gasification process.
Based on this, the present invention provides a kind of crushed coal pressurized-gasification furnace nitrogen purging device, which includes adding with broken coal
The common air pipeline 1 of the gasifying agent mixing tube connection of pressure gasification furnace and the nitrogen purging being connected to the common air pipeline 1
Pipeline 2, the nitrogen purge line 2 are disposed with nitrogen check valve 21, nitrogen gate valve 22 and nitrogen by the flow direction of nitrogen
Gas blind plate 23.The nitrogen blind plate 23 can be 8 word blind plates.
When without using nitrogen, nitrogen blind plate 23 can completely cut through the media flow in pipeline, prevent valve leak or
Maloperation, at this time nitrogen gate valve 22 be in off state；When using nitrogen purge line, conducting nitrogen blind plate 23 opens simultaneously
Nitrogen gate valve 22 enables nitrogen to be passed through common air pipe by the connectivity part of nitrogen purge line 2 and common air pipeline 1
Line 1, gasifying agent mixing tube and gasification furnace etc., at this time nitrogen check valve 21 medium can be further prevented to play a reversed role or poorly sealed institute
The security risk brought.
The apparatus according to the invention, wherein connection of the common air pipeline 1 in itself and the nitrogen purge line 2
The upstream portion at place is disposed with the first gate valve of common air 11 and common air blind plate by the flow direction of common air
12.When using nitrogen purge line, nitrogen blind plate 23 is not only connected and opens nitrogen gate valve 22, at the same can also guide (seal
Close) the first gate valve 11 of common air blind plate 12 or closing, and then common air is avoided to be mixed with nitrogen, ensure the purity of nitrogen.
The apparatus according to the invention, wherein connection of the common air pipeline 1 in itself and the nitrogen purge line 2
The downstream part at place is provided with pneumatic control valve 13.Pneumatic control valve is typically that installation is connected to regulating valve by pneumatic actuator
The regulating device formed after debugging.By receiving the control signal of industrial automation control system, which can use
In adjusting the technological parameters such as flow, pressure of flow media in pipeline, such as the flow of adjustment nitrogen and pressure etc..
The apparatus according to the invention, wherein connection of the common air pipeline 1 in itself and the nitrogen purge line 2
The downstream part at place is additionally provided with common air check valve 14 and the second gate valve of common air 15；Preferably, the common air
Check valve 14 and the second gate valve of common air 15 are located at the downstream of the pneumatic control valve 13.
The second gate valve of the common air 15 is generally in open state, because when whether gasified boiler system works normally
Using common air, or nitrogen is used when purging gasification furnace, it is mixed into gasifying agent all to pass through second gate valve of common air 15
Pipe is closed, gasification furnace then can be entered.The common air check valve 14 can then prevent the logistics in gasifying agent mixing tube play a reversed role to
Common air pipeline 1.
The apparatus according to the invention, wherein connection of the common air pipeline 1 in itself and the nitrogen purge line 2
It is provided with first between place and the common air blind plate 11 and leads leaching 16 and/or the pneumatic control valve 13 and the public sky
It is provided with second between gas check valve 14 and/or the second gate valve of common air 15 and leads leaching 17.
FICQ equipment and/or TI equipment can be also arranged in the device of the invention on common air pipeline 1, wherein FICQ is set
It is standby to refer to flow, display, control, accumulation (Flow, Indication, Control, Quantity) equipment, TI equipment refer to temperature,
Show (Temperature, Indication) equipment.Preferably, the FICQ equipment and TI equipment are set to common air pipe
Between the connectivity part and pneumatic control valve 13 of line 1 and nitrogen purge line 2, for providing the flow in common air pipeline 1, tiring out
Accumulated amount and temperature information, and pneumatic control valve 13 can be controlled and adjusted.
As an implementation, by the flow direction of common air, public sky is disposed on common air pipeline 1
The first gate valve of gas 11, common air blind plate 12, the second gate valve of pneumatic control valve 13, common air check valve 14 and common air
15；By the flow direction of nitrogen, the nitrogen purge line 2 is disposed with nitrogen check valve 21, nitrogen gate valve 22 and nitrogen
Blind plate 23, wherein the nitrogen purge line 2 is communicated in the common air blind plate 12 and pneumatic control valve of common air pipeline 1
Position between 13.
As another embodiment, by the flow direction of common air, it is disposed on common air pipeline 1 public
The first gate valve of air 11, common air blind plate 12, first lead that leaching 16, pneumatic control valve 13, second to lead leaching 17, common air unidirectional
Valve 14 and the second gate valve of common air 15；By the flow direction of nitrogen, it is unidirectional that the nitrogen purge line 2 is disposed with nitrogen
Valve 21, nitrogen gate valve 22 and nitrogen blind plate 23, wherein what the nitrogen purge line 2 was communicated in common air pipeline 1 first leads
Position between leaching 16 and pneumatic control valve 13.Preferably, common air pipeline 1 and nitrogen purge line 2 connectivity part and
Between pneumatic control valve 13, it is additionally provided with FICQ equipment and/or TI equipment.
The present invention also provides the method for using above-mentioned device to carry out nitrogen purging to crushed coal pressurized-gasification furnace, the sides
Method includes：
By crushed coal pressurized-gasification furnace pressure release to normal pressure, the nitrogen blind plate 23 in nitrogen purge line 2 is connected, and open nitrogen
Then gate valve 22 is passed through nitrogen into nitrogen purge line 2, to replace the combustible gas and vapor in gasification furnace and pipeline,
And coal dust remaining in gasification furnace and pipeline is purged, until flammable Gas content in gas composition analysis is less than 0.5%.To the greatest extent
Pipe oxygen usually serves combustion-supporting, but it actually directly takes part in combustion process, and therefore, for convenience of description, herein can
Combustion gas includes oxygen.
According to the method for the present invention, the method further includes：That closes the common air pipeline 1 is located at common air pipe
The part of 2 junction upstream of line 1 and nitrogen purge line；Preferably, by closing the first gate valve of common air (11) and guide
Common air blind plate (12) is to close the part of public air line (1).
For example, can the first gate valve of the common air 11 and guide be closed for crushed coal pressurized-gasification furnace pressure release to normal pressure
Then common air blind plate 12 is connected the nitrogen blind plate 23 in nitrogen purge line 2, and opens nitrogen gate valve 22, then to nitrogen
It is passed through nitrogen in air-blowing sweeping 2, to replace gasification furnace and in relation to the combustible gas and vapor in pipeline, and purges gasification
Remaining coal dust in stove and pipeline.
According to the method for the present invention, wherein replaced to the volume of combustible gas by gasification furnace and in relation to the combustible gas in pipeline
Percentage is less than 0.45%, such as replacement of oxygen to oxygen percent by volume is less than 0.45%.In actual mechanical process, nitrogen
Gas need to usually analyze qualification at least twice to the displacement of oxygen combustible gas, i.e. the percent by volume of oxygen combustible gas is less than
0.45%, to more effectively preventing burning zone in gasification furnace, and prevent, gasification layer resume combustion or stop in gasification furnace empties
Afterwards, the spontaneous combustion of pulverized coal in equipment is remained in stove.
In general, crushed coal pressure gasifying technique is using blocky lignite as raw material, it is to reduce caused by coal gas entrained fines
Carbon loss, preferably in 13mm or more, the coal amount less than 2mm controls within 1.5% as-fired coal minimum grain size, thin less than 13mm
Beans amount controls within 5%.Thus technically, crushed coal pressure gasifying technique requires raw material Brown Coal extremely tight
Lattice are unable to off-design index.However it is described previously, Datang Ke Qi natural gas from coal company belongs to low heat value, height using lignite
The coal of moisture, high volatile, thermal stability level Four, feature show as that thermal stability is very poor, mechanicalness is low, easy-weathering in air
Rupture enters furnace gasization and easily bursts in the high moisture content atmosphere of high temperature in the process, and dusting is serious.This be easy to cause in gasification furnace can be with
Coal gas is taken out of from outlet, blocks outlet conduit and catch basin, and pollution environment, clog downstream equipment repeatedly cause system shutdown.Cause
, there is a large amount of coal dust in this, gathering for coal dust easily causes spontaneous combustion in gasification furnace and its pipeline and corollary equipment, give production band
Carry out great hidden danger.
Meanwhile for the characteristic of lignite, Datang Ke Qi natural gas from coal company uses 4.0Mpa crushed coal pressure gasifying works
Skill produces natural gas with lignite inferior, this belongs to domestic first set demonstrative project, and ripe large industrialized business is not transported before
Row example.Therefore, it is broken in 4.0Mpa to also belong to technically first Application for nitrogen purging device provided by the present invention and method
Coal pressure gasification technique, no operating experience can be used for reference.
By using the nitrogen purging device and method of the present invention, following technique effect can be obtained：
1. can prevent gasification furnace from stopping after pressure release in stove after burning zone and gasification layer resume combustion or gasification furnace parking emptying in stove
The spontaneous combustion of pulverized coal in equipment is remained in, the safety in equipment and personnel's maintenance process is improved, eliminates security risk.
2. it is can avoid using the method for the present invention because of the time consumed in interim bridging nitrogen displacement purging sebific duct and manpower,
And the operating environment of gas making workshop is substantially improved, reduce pollution of the interim pipeline gas leakage to environment, overhaul of the equipments is made to work
It is more convenient, reliable.
3. can effectively shorten displacement purge time, reduce equipment and pipeline time between overhauls(TBO).For example, more gasification furnaces are tight
Nitrogen displacement purges (three phases totally 48, at present domestic similar most 5 of running gear) and without back-up vaporization after emergency stop vehicle pressure release
Under oven-like state, it can ensure the qualified process of short time completion nitrogen displacement purging before separate unit gasification furnace overhaul of the equipments, and separate unit
The parking maintenance time of gasification furnace apparatus can shorten to original 1/2.
Description of the drawings
Hereinafter, carry out the embodiment that the present invention will be described in detail in conjunction with attached drawing, wherein：
Fig. 1 shows a kind of schematic diagram of embodiment of the crushed coal pressurized-gasification furnace nitrogen purging device of the present invention；
Fig. 2 shows the schematic diagrames of the another embodiment of the crushed coal pressurized-gasification furnace nitrogen purging device of the present invention.
Reference sign：
1, common air pipeline；11, the first gate valve of common air；12, common air blind plate；13, pneumatic control valve；14、
Common air check valve；15, the second gate valve of common air；16, first leaching is led；17, second leaching is led；
2, nitrogen purge line；21, nitrogen check valve；22, nitrogen gate valve；23, nitrogen blind plate.
Specific implementation mode
It is further illustrated the present invention below by specific embodiment, it should be understood, however, that, these embodiments are only
It is used for specifically describing in more detail, and is not to be construed as limiting the present invention in any form.
Embodiment 1
The present embodiment is used to illustrate the crushed coal pressurized-gasification furnace nitrogen purging device of the present invention and using the device to gas
Change the method that stove is purged.
As shown in Figure 1, common air pipeline 1 is communicated in gasifying agent mixing tube, which is connected with gasification furnace.
By the flow direction of common air, the first gate valve of common air 11, public is disposed on common air pipeline 1
Air blind plate 12, pneumatic control valve 13, common air check valve 14 and the second gate valve of common air 15.By the flowing side of nitrogen
To the nitrogen purge line 2 is disposed with nitrogen check valve 21, nitrogen gate valve 22 and nitrogen blind plate 23.
The nitrogen purge line 2 be communicated in common air pipeline 1 common air blind plate 12 and pneumatic control valve 13 it
Between position.
When crushed coal pressurized-gasification furnace works normally, that is, when not using nitrogen purge line, guide nitrogen blind plate 23 simultaneously closes
Nitrogen gate valve 22 is closed, common air blind plate 12 is conducting state, the second lock of the first gate valve of common air 11 and common air at this time
Valve 15 is opened.In this state, common air enters gasifying agent mixing tube and is mixed with steam, is carried out subsequently into gasification furnace anti-
It answers.
When gasification furnace overhauls parking or stops in emergency according to plan, then use nitrogen purge line to gasification furnace and its pipeline
Purge is carried out, guide common air blind plate 12 and the first gate valve of common air 11 is closed at this time, simultaneously turns on nitrogen blind plate
23 and nitrogen gate valve 22 is opened, to enable connectivity part of the nitrogen Jing Guo nitrogen purge line 2 and common air pipeline 1, led to
Enter common air pipeline 1, gasifying agent mixing tube and gasification furnace etc., to replace combustible gas and steam and purge coal dust.
Pneumatic control valve 13 cannot be only used for the ginsengs such as flow, the pressure of common air when adjustment gasification furnace works normally
Number can also adjust flow, the pressure and other parameters of nitrogen when nitrogen purges, to make the combustible gas in gasification furnace and pipeline
Percent by volume is less than 0.5%.
Before stating nitrogen purger in use, the mean repair period of separate unit gasification furnace is 10 days, progress 6 every year~
10 parking maintenances.After using above equipment, due to shortening displacement purge time, the time between overhauls(TBO) of separate unit gasification furnace can contract
The short half for being 5 days, making that the parking maintenance time is only original.With three phase of Datang Ke Qi natural gas from coal company totally 48 gasification furnaces
It calculates, will reduce amount to 1440~2400 days parking maintenance time every year, daily maintenance labour cost and productivity effect are general
At 200,000 yuan or so, benefit 28800~480,000,000 yuan or so can be at least created every year after transformation.
Embodiment 2
The present embodiment is used to illustrate the crushed coal pressurized-gasification furnace nitrogen purging device of the present invention and using the device to gas
Change the method that stove is purged.
As shown in Fig. 2, common air pipeline 1 is communicated in gasifying agent mixing tube, which is connected with gasification furnace.
By the flow direction of common air, the first gate valve of common air 11, public is disposed on common air pipeline 1
Air blind plate 12, pneumatic control valve 13, common air check valve 14 and the second gate valve of common air 15.By the flowing side of nitrogen
To the nitrogen purge line 2 is disposed with nitrogen check valve 21, nitrogen gate valve 22 and nitrogen blind plate 23.
The nitrogen purge line 2 be communicated in common air pipeline 1 common air blind plate 12 and pneumatic control valve 13 it
Between position.Between the connectivity part and pneumatic control valve 13 of common air pipeline 1 and nitrogen purge line 2, it is additionally provided with
FICQ equipment and TI equipment.
When crushed coal pressurized-gasification furnace works normally, that is, when not using nitrogen purge line, guide nitrogen blind plate 23 simultaneously closes
Nitrogen gate valve 22 is closed, common air blind plate 12 is conducting state, the second lock of the first gate valve of common air 11 and common air at this time
Valve 15 is opened.In this state, common air enters gasifying agent mixing tube and is mixed with steam, is carried out subsequently into gasification furnace anti-
It answers.
When gasification furnace overhauls parking or stops in emergency according to plan, then use nitrogen purge line to gasification furnace and its pipeline
Purge is carried out, guide common air blind plate 12 and the first gate valve of common air 11 is closed at this time, simultaneously turns on nitrogen blind plate
23 and nitrogen gate valve 22 is opened, to enable connectivity part of the nitrogen Jing Guo nitrogen purge line 2 and common air pipeline 1, led to
Enter common air pipeline 1, gasifying agent mixing tube and gasification furnace etc., to replace combustible gas and steam and purge coal dust.
Pneumatic control valve 13 cannot be only used for the ginsengs such as flow, the pressure of common air when adjustment gasification furnace works normally
Number can also adjust flow, the pressure and other parameters of nitrogen when nitrogen purges, to make the combustible gas in gasification furnace and pipeline
Percent by volume is less than 0.5%.
Although present invention has been a degree of descriptions, it will be apparent that, do not departing from the spirit and scope of the present invention
Under the conditions of, the appropriate variation of each condition can be carried out.It is appreciated that the present invention is not limited to the embodiments, and it is attributed to right
It is required that range comprising the equivalent replacement of each factor.
Claims (4)
1. a kind of crushed coal pressurized-gasification furnace nitrogen purging device, which is characterized in that the device includes and crushed coal pressurized-gasification furnace
The common air pipeline (1) of gasifying agent mixing tube connection and the nitrogen purge line for being communicated to the common air pipeline (1)
(2), the nitrogen purge line (2) is disposed with nitrogen check valve (21), nitrogen gate valve (22) by the flow direction of nitrogen
With nitrogen blind plate (23)；Wherein, the common air pipeline (1) its under the connectivity part of the nitrogen purge line (2)
Trip part is provided with pneumatic control valve (13), connection of the common air pipeline (1) in itself and the nitrogen purge line (2)
The upstream portion at place is disposed with the first gate valve of common air (11) and common air blind plate by the flow direction of common air
(12), the common air pipeline (1) is additionally provided with public affairs in the downstream part of itself and the connectivity part of the nitrogen purge line (2)
With air check valve (14) and the second gate valve of common air (15), and the wherein described common air pipeline (1) its with it is described
It is provided with first between the connectivity part of nitrogen purge line (2) and the common air blind plate (11) and leads leaching (16) and/or described
It is provided with second between pneumatic control valve (13) and the common air check valve (14) and/or the second gate valve of common air (15)
Lead leaching (17).
2. the apparatus according to claim 1, which is characterized in that the common air check valve (14) and common air second
Gate valve (15) is located at the downstream of the pneumatic control valve (13).
3. the method for carrying out nitrogen purging to crushed coal pressurized-gasification furnace using the device described in claims 1 or 22, feature exist
In, the method includes：
By crushed coal pressurized-gasification furnace pressure release to normal pressure, by closing the first gate valve of common air (11) and guide common air blind plate
(12) with close public air line (1) positioned at the portion of common air pipeline (1) and nitrogen purge line (2) junction upstream
Point, the nitrogen blind plate (23) in conducting nitrogen purge line (2), and nitrogen gate valve (22) is opened, then to nitrogen purge line
(2) it is passed through nitrogen in, to replace the combustible gas and steam in gasification furnace and pipeline, and purges coal remaining in gasification furnace
Powder.
4. according to the method described in claim 3, it is characterized in that, being replaced by gasification furnace and in relation to the combustible gas in pipeline to can
The percent by volume of combustion gas is less than 0.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410230385.0A CN105132026B (en) | 2014-05-28 | 2014-05-28 | A kind of crushed coal pressurized-gasification furnace nitrogen purging device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410230385.0A CN105132026B (en) | 2014-05-28 | 2014-05-28 | A kind of crushed coal pressurized-gasification furnace nitrogen purging device and method |
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| CN105132026B true CN105132026B (en) | 2018-09-07 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105674055A (en) * | 2016-01-19 | 2016-06-15 | 康乃尔化学工业股份有限公司 | Nitrogen valve group used for safety protection |
| CN108659889B (en) * | 2018-03-30 | 2020-05-01 | 中煤鄂尔多斯能源化工有限公司 | Cold-standby start-up process method for BGL gasification furnace |
| CN111019709A (en) * | 2019-11-22 | 2020-04-17 | 唐山科源环保技术装备有限公司 | Device and method for recycling coal gas discharged to coal charger in coal charging process |
| CN112284153A (en) * | 2020-10-31 | 2021-01-29 | 山东省药用玻璃股份有限公司 | Method for purging gas flue by nitrogen when reversing gas-fired horseshoe flame glass kiln |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1721511A (en) * | 2005-07-01 | 2006-01-18 | 煤炭科学研究总院北京煤化工研究分院 | Process for pressurized gasification of dry coal fines |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1721511A (en) * | 2005-07-01 | 2006-01-18 | 煤炭科学研究总院北京煤化工研究分院 | Process for pressurized gasification of dry coal fines |
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