CN1322795A - Cooling and washing equipment for composite bed high-temperature gas and its industrial application - Google Patents
Cooling and washing equipment for composite bed high-temperature gas and its industrial application Download PDFInfo
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- CN1322795A CN1322795A CN 01112880 CN01112880A CN1322795A CN 1322795 A CN1322795 A CN 1322795A CN 01112880 CN01112880 CN 01112880 CN 01112880 A CN01112880 A CN 01112880A CN 1322795 A CN1322795 A CN 1322795A
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Abstract
The cooling and washing equipment for composite bed high temperature gas includes casing, water spraying ring, gas guiding pipe, distributor, bubble separator, static sludge breaker, annular water feeder, skimmer and other parts. The composite bed is one with two hot mass transferring beds of both showing impact and bubbling; has high efficiency, small water and ash entraining amount, less choking of the gas outlet in chiller and less investment in equipment; and is especially suitable for cooling and washing gas produced through partial oxidation process in gas flow bed by using coal, petroleum coke, organism, inflammable industrial waste gas, etc. as material.
Description
The present invention relates to a kind of multiple-hearth cooling-washing equipment of the coal gas of high temperature when producing coal gas for the unstripped gas fluidized bed with the hydrocarbon-containiproducts, specifically a kind of is raw material with coal, refinery coke, biomass, flammable trade waste etc., the multiple-hearth cooling-washing equipment of the coal gas that the air flow bed partial oxidation process is produced.
The coal gas of producing for the flow of feed gas bed gasifying apparatus with the hydrocarbon-containiproducts, the technology that in Chinese patent (patent No. ZL98110616.1 " multi-nozzle opposed type coal water slurry or dry coal dust gasification furnace and application thereof "), provides as the contriver, the general pressure of coal gas is 0.2～12.0MPa, temperature is 1250～1550 ℃, contain lime-ash in the coal gas, its dry gas composition CO
2=2～22%, CO+H
2=75～93%, N
2, Ar, H
2S, COS, NH
3, HCl, CH
4, HCN, HCOOH etc. are 3～5%.For coal gas being used to produce fields such as synthetic ammonia, oil product, methyl alcohol and combined cycle (IGCC) generating, should wash earlier and lower the temperature, a kind of method of general use is to wash coal gas of high temperature with recirculated water, removes most of contained lime-ash and makes its cooling, humidification (saturated).
Chinese patent (application number 891010262.1,89101054.8,89100533.1) the quenching ring (Quench Ring) and the follow-on technology thereof that are provided by Tyke Sa Ke (Destec) development company disclosed, Chinese patent (application number 891098301.3,89101038.4) washing methods and the device that provide by development company of Texaco (Texaco) be provided, above-mentioned patent all is that the water that the quenching ring spray goes out is flowed down along tube wall, do not utilize washing water and coal gas of high temperature to be to intersect the favourable condition of bump, thereby its caloic transmission area is limited, and efficient is not high.
Texaco (Texaco) Chinese patent that development company applied for (application number 850104027) proposes to prevent in the washer outlet technology of ash deposition, the method that promptly adds wash-down water by baffle plate with in the gas exit pipeline, efficient is lower, its shock chamber (Quench Chamber) outlet coal gas band water, a device of producing 100000 tons of ammonia per year, water amount reaches 20t/h unexpectedly; Be with the grey quantity of slag big, shock chamber's gas exit pipeline stops up easily; Be provided with electronic dregs breaker in the bottom, shock chamber, every about 400,000 dollars.Because the existence of above-mentioned shortcoming, relevant producer urgently wishes a kind of well behaved high temperature coal gas cooling and washing equipment.
One of purpose of the present invention is to research and develop a kind of cooling and washing equipment for composite bed high-temperature gas, and to overcome the existing in prior technology water amount and to be with the grey quantity of slag big, shock chamber's gas exit pipeline stops up easily, the defective that facility investment is big;
Two of purpose of the present invention is to provide the application of described multiple-hearth equipment in cooling washing coal gas of high temperature.
Realize the technical scheme of the object of the invention:
Cooling and washing equipment for composite bed high-temperature gas of the present invention comprises parts such as housing, water ring, airway, uniform device, bubble separation scraper, static broken slag device, annular water controller and scum dredger.
Said water ring is the ring-shaped round pipe that a downside has annular slot, and ring-shaped round pipe is connected with washing water import on the housing, and water ring is horizontal positioned in housing, and top is provided with gas entry and web member, so that be connected with the vaporizer of vapourizing furnace.Washing water spray from annular slot, form with coal gas of high temperature and intersect percussion flow, increase the caloic transmission area, improve detersive efficiency, carry out spray bump that caloic transmits bed thereby formed.
Said airway is fixed on the water ring, the lower end be funnelform uniform device and link to each other, conical surface angle is 80～160 degree, the conical surface is offered a plurality of circular holes that vary in size, with uniform coal gas.
Said bubble separation scraper is made of the multilayer separating element, and every layer of separating element is made up of multi-turn angle bar and web member angle bar thereof by arranged in concentric circles, and the angle bar outer rim is opened the slot at 60～100 degree angles.Every layer of separating element horizontal positioned, slot is downward, and this bubble separation scraper is arranged in the cavity between housing and the airway, realizes the horizontal separation to bubble.During operation, the bubble separation scraper immerses in the washing water, carries out the bubbling bed that caloic is transmitted thereby formed.
Said static broken slag device is arranged on the below of bubble separation scraper, is a hemispheric grid, and the intersection point place of grid establishes rhombus break awl.
Said annular water controller is arranged at the lower end of housing, constitute by ring pipe and some arms, arm is communicated with ring pipe and housing, ring pipe is provided with water inlet, water flowing is built bridge at the slag-drip opening place of housing to prevent lime-ash, and it is mobile to promote the interior water of multiple-hearth equipment, for static break creates conditions.
Said scum dredger can adopt conventional scum dredger, is fixedly installed on the gas exit of housing, to remove the foam in the outlet coal gas.
Above-mentioned equipment can be used for coal gas of high temperature is cooled off washing, and concrete application method is as follows:
Washing water enter water ring by the washing water import of housing, and spray by the line of rabbet joint, the coal gas of high temperature that enters with gas entry forms and intersects percussion flow, in airway coal gas lowered the temperature, humidification, washing water evaporation, molten ash are solidified, are lowered the temperature and for washing water soak into, wherein part is that gas phase is carried than fine particle, other parts are mixed with washing water, and this promptly finishes the spray bump bed that caloic is transmitted between coal gas and the washing water.
Cooling and humidification coal gas carry and contain grey pulp water and enter uniform device by the lower end of airway, and coal gas enters the bubbling bed through uniform hole.For preventing that bubble from growing up and the surface is brought in constant renewal in, in the bubbling bed, be provided with the horizontal separating element of bubble, the coal gas that further reaches a high temperature cooling, humidification (saturated), the purpose of washing.Especially when driving, can prevent because of system's replace oxygen defectively, and contain red-hot ash in the air pocket, form naked light and set off an explosion.By scum dredger, carry water and the lime-ash that further remove in the coal gas flow out housing, and ash content reaches 5g/Nm in the coal gas
3Below, moisture 140g/Nm
3
Because the density variation between coal gas, washing water, the lime-ash, part washing water and volume particle size (＞3mm), and the lime-ash of most of small grain size is in the airway lower end enters washing water in the housing, all particle diameters are static broken slag device greater than grid spatial lime-ash or other solidss and hold back, and then enter the bottom of static broken slag device by the grid space than small-particle.The solidss such as lime-ash of bottom are in the disorderly kinestate of not stopping because water mobile that enters housing from annular water controller makes in the housing particularly again, when they during constantly with the rhombus awl collision of static broken slag device, grain breakage, particle size reduction.The break efficient of static broken slag device depends on cindery movement velocity, so flow velocity should have higher value.Another function of annular water inlet device is to prevent that lime-ash from building bridge at the slag-drip opening place.Arm by annular water inlet device, washing water enter housing with certain speed, having promoted the intravital water of shell flows, suppressed the deposition that lime-ash is bored under housing, destroyed the condition that lime-ash is built bridge, effectively prevented the obstruction of slag-drip opening, contained the lime-ash water out outflow of grey pulp water by the housing downside, lime-ash is discharged by the slag-drip opening of housing bottom.
Through above-mentioned cooling washing process, institute dreggy 93% will separate with coal gas in housing in the coal gas of high temperature; Coal gas is that water vapor is saturated substantially, and gas temperature is reduced to temperature of saturation.
Below will the present invention is further illustrated by accompanying drawing, so that essence of the present invention is had more deep understanding.
Fig. 1 is the equipment synoptic diagram.
Fig. 2 is the water ring synoptic diagram.
Fig. 3 be among Fig. 1 A-A to synoptic diagram.
Fig. 4 be among Fig. 3 F-F to synoptic diagram.
Fig. 5 is the uniform device synoptic diagram.
Fig. 6 is the synoptic diagram of B-B among Fig. 1.
Fig. 7 be among Fig. 1 C-C to synoptic diagram.
Fig. 8 be among Fig. 1 D-D to synoptic diagram.
Fig. 9 is the synoptic diagram of E-E among Fig. 1.
As seen from Figure 1, composite bed high-temperature gas washing equipment of the present invention comprises parts such as housing 1, water ring 7, airway 5, uniform device 4, bubble separation scraper 6, static broken slag device 3, annular water controller 2 and scum dredger 10.
By Fig. 1 and Fig. 2 as seen, said water ring 7 is the ring-shaped round pipe that a downside has annular slot 701, the line of rabbet joint 701 medullary rays and horizontal angle are 10～60 degree, ring-shaped round pipe is connected with the washing water import 8 that is arranged on housing 1 top, water ring 7 horizontal positioned in housing, top is provided with gas entry 9 and web member;
Said airway 5 is fixed on the water ring 7, the lower end links to each other with uniform device 4, by Fig. 1, Fig. 5 and Fig. 6 as seen, said uniform device 4 is funnel-form, conical surface angle is 80～160 degree, offer the different circular hole of several diameter 401 at the conical surface, bore dia increases from inside to outside gradually, with uniform gas;
By Fig. 1, Fig. 3 and Fig. 4 as seen, said bubble separation scraper 6 is arranged in the cavity between housing 1 and the airway 5, is made of multilayer separating element 601.Separating element 601 is made up of multi-turn angle bar 602 and web member angle bar 603 thereof, and angle bar 602,603 edges have slot, and angle is 60～100 degree.Separating element 601 horizontal positioned, slot is downward;
By Fig. 1 and Fig. 7 as seen, said static broken slag device 3 is a hemispheric grid, the grid intersection that preferably is square, and the space is 30 * 30～150 * 150mm, the intersection point place of grid establishes rhombus break awl 301.This static state broken slag device 3 is fixed on the below of airway 5;
By Fig. 1 Fig. 8 as seen, said annular water controller 2 is arranged at the lower end of housing 1, is made of ring pipe 201 and some arms 202, and arm 202 is communicated with ring pipe 201 and housing 1, and ring pipe 201 is provided with water inlet 203;
By Fig. 1 and Fig. 9 as seen, said scum dredger 10 is fixedly installed on housing 1 internal upper part gas exit 11 places, and this scum dredger 10 is made of many slotted-tubes 1001, tube bank steady arm 1002.The line of rabbet joint radius angle of slotted-tube 1001 upper edge tube axis direction flutings is 60～90 degree, and caliber d is 20～60mm.Slotted-tube 1001 is parallel to each other, be arranged into fan-shaped by concentric(al) circles, arrange 4～8 layers altogether, the inwall distance of its outermost slotted-tube 1001 medullary ray place radius of a circles and housing 1 is 0.6～1d, each interlayer radially tube pitch is 1.2～1.8d, circumferentially tube pitch also is 1.2～1.8d, and the open slot symmetry is towards the axis of housing.Its outer periphery is 3～5 times of gas exit 11 diameters, and the height of scum dredger 10 is 4～6 times of gas exit diameter, and gas exit 11 axis and fan-shaped symmetric line coincide.
Above-mentioned multiple-hearth equipment can be used for coal gas of high temperature is cooled off washing, and concrete application method is as follows:
Washing water enter water ring 7 by washing water import 8, and by the speed ejection of the line of rabbet joint 701 with 1～8m/s;
Cooling and humidification coal gas carry that to contain grey pulp water be 1～10m/s by the speed that the outlet of the lower end of airway 5 enters uniform device 4, and coal gas enters the bubbling bed through uniform hole 401 and contacts with washing water.In the bubbling bed, more than 6 time bubble laterally to be separated through the bubble separation scraper, the speed of bubble in the bubbling bed is 1～6m/s.
Because the density variation between coal gas, washing water, the lime-ash, part washing water and volume particle size (＞3mm), and the lime-ash of most of small grain size is in airway 5 lower ends enter washing water in the housing 1, all particle diameters are static broken slag device 3 greater than grid spatial lime-ash or other solidss and hold back, and then enter the bottom of static broken slag device 3 by the grid space than small-particle.Annular water controller 2 adds washing water flowing with 0.1～2m/s speed from bottom to top, making in the housing 1 particularly, the solidss such as lime-ash of bottom are in the disorderly kinestate of not stopping, when they constantly bore 301 collisions with the rhombus of static broken slag device 3, grain breakage, particle size reduction reaches the break purpose.The break efficient of static broken slag device 3 depends on cindery movement velocity, so flow velocity should have higher value.Another function of annular water inlet device 2 is to prevent that lime-ash from building bridge at the slag-drip opening place.By the arm 202 of annular water inlet device 2, washing water enter housing 1 with certain speed, and the water that has promoted in the housing 1 flows; Suppressed the deposition of lime-ash at 1 time awl of housing, destroyed the condition that lime-ash is built bridge, effectively prevented the obstruction of slag-drip opening 13, contained lime-ash water out 12 outflows of grey pulp water by housing 1 downside, lime-ash is discharged by the slag-drip opening 13 of housing 1 bottom.
By above-mentioned disclosed technical scheme as seen, the said device structure of the present invention is simple, water amount and be with the grey quantity of slag little, shock chamber's gas exit pipeline is difficult for stopping up, facility investment is little, and very being suitable for coal, refinery coke, biomass, flammable trade waste etc. is the cooling washing of the coal gas of unstripped gas fluidized bed partial oxidation process production.
Below be example with the coal water slurry gasification device of handling 1000 tons of coals a day, further specify related content of the present invention.
The gas pressure that enters housing 1 is 6.5MPa, and temperature is 1300 ℃, and the dry gas flow is 85000Nm
3/ h contains CO in the dry gas
2=17%, CO+H
2=81%, also have CH
4, N
2, Ar, H
2S, COS, NH
3, HCl, HCN, HCOOH etc., account for 2%, be benchmark with the dry gas, wherein containing the grey quantity of slag is 70g/Nm
3, per hour be equivalent to coal gas and carry 6 tons of lime-ash and enter housing 1.
Above-mentioned coal gas of high temperature enters airway 5 with the speed of 12m/s, temperature of washing water is 240 ℃, it is 2.5kg that every standard cubic meter dry gas adds the washing water yield, washing water enter water ring 7 by the water source through 4 imports 8, washing water are from the speed ejection of the line of rabbet joint 701 with 3m/s, and coal gas humidification in spray bump bed, molten ash solidify, lower the temperature and be the washing water infiltration, part is that gas phase is carried than fine particle, and other parts are mixed with water.
Cooling and humidification coal gas carry and contain grey pulp water and pass the uniform hole 401 of uniform device 4 by the lower end of airway 5 with 3m/s speed, and coal gas be that bubble separation scraper 6 is laterally separated constantly in the bubbling bed, carries out caloic with washing water and exchanges.The coal gas that comes out from the upper end carries a small amount of washing water and a small amount of lime-ash, streams by scum dredger 10 with the speed of 1.8m/s, goes out that ash content reaches 5g/Nm in housing 1 coal gas
3Moisture 140g/Nm
3
Part washing water and volume particle size (＞3mm), and the lime-ash of most of small grain size is in airway 4 lower ends enter washing water in the housing 1.All particle diameters are static broken slag device 3 greater than grid spatial lime-ash or other solidss and hold back, and carry out fragmentation.
Through above-mentioned washing process, institute dreggy 93% will separate with coal gas in the coal gas of high temperature; Coal gas is that water vapor is saturated substantially, and the washing water steam output is 135t/h, and dry gas is 1: 1.6 with the steam ratio; The 12t/h washing water are that coal gas is taken out of outside the washer, and the self-contained lime-ash water out 12 of 90t/h washing water is sent to downstream processing, with recycle and discharging.
Lime-ash discharges out of the furnace from exporting 13, advances operation processing down.
Claims (7)
1. a cooling and washing equipment for composite bed high-temperature gas is characterized in that: comprise housing (1), water ring (7), airway (5), uniform device (4), bubble separation scraper (6), static broken slag device (3), annular water controller (2) and scum dredger (10);
Said water ring (7) is the ring-shaped round pipe that a downside has annular slot (701), and ring-shaped round pipe is connected with the washing water import (8) that is arranged on housing (1) top, and top is provided with gas entry (9) and web member;
Said airway (5) lower end links to each other with funnel-form uniform device (4), and the upper end is fixed on the water ring (7); Uniform device (4) conical surface angle is 80～160 degree, and the conical surface is offered a plurality of circular holes that vary in size (401);
Said bubble separation scraper (6) is arranged in the cavity between housing (1) and the airway (5), constitute by multilayer separating element (601), every layer of separating element (601) links to each other with housing (1), separating element (601) is made up of angle bar (602) and web member angle bar (603) thereof by arranged in concentric circles, and angle bar (602), (603) outer rim are opened the slot at 60～100 degree angles;
Said static broken slag device (3) is a hemispheric grid, and the intersection point place of grid establishes rhombus break awl (301), and this static state broken slag device (3) is fixed on the below of airway (5);
Said annular water controller (2) is arranged at the lower end of housing (1), is made of ring pipe (201) and some arms (202), and arm (202) is communicated with ring pipe (201) and housing (1), and ring pipe (201) is provided with water inlet (203);
Said scum dredger (10) is fixedly installed on housing (1) internal upper part gas exit (11) and locates.
2. multiple-hearth equipment as claimed in claim 1 is characterized in that, the said line of rabbet joint (701) medullary ray and horizontal angle are 10～60 degree.
3. multiple-hearth equipment as claimed in claim 1 is characterized in that, the grid intersection that is square, and the space is 30 * 30～150 * 150mm.
4. multiple-hearth equipment as claimed in claim 1, it is characterized in that, said scum dredger (10) is made of many slotted-tubes (1001) and tube bank steady arm (1002), the line of rabbet joint radius angle of slotted-tube (1001) upper edge tube axis direction fluting is 60～90 degree, slotted-tube (1001) is arranged into fan-shaped by concentric(al) circles, the inwall distance of outermost slotted-tube (1001) medullary ray place radius of a circle and housing (1) is 0.6～1d, each interlayer radially tube pitch is 1.2～1.8d, circumferentially tube pitch is 1.2～1.8d, the open slot symmetry is towards the axis of housing, its outer periphery is 3～5 times of gas exit (11) diameter, the height of scum dredger (10) is 4～6 times of gas exit (11) diameter, and gas exit (11) axis and fan-shaped symmetric line coincide.
As claim 1～4 arbitrary as described in the application of equipment, it is characterized in that can be used for to coal gas of high temperature cool off, washing and humidification.
6. application as claimed in claim 5, it is characterized in that, washing water spray from the line of rabbet joint (701) with the speed of 1～8m/s, the speed that coal gas goes out uniform hole (401) is 1～10m/s, the speed that enters housing 1 from arm (202) is 2～10m/s, and the washing water that annular water controller (2) adds flow with 0.1～2m/s speed from bottom to top.
7. application as claimed in claim 5 is characterized in that, the hydraulic pressure that enters annular water controller (2) is higher than the interior pressure of housing (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01112880 CN1114681C (en) | 2001-05-15 | 2001-05-15 | Cooling and washing equipment for composite bed high-temperature gas and its industrial application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01112880 CN1114681C (en) | 2001-05-15 | 2001-05-15 | Cooling and washing equipment for composite bed high-temperature gas and its industrial application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1322795A true CN1322795A (en) | 2001-11-21 |
| CN1114681C CN1114681C (en) | 2003-07-16 |
Family
ID=4659626
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01112880 Expired - Lifetime CN1114681C (en) | 2001-05-15 | 2001-05-15 | Cooling and washing equipment for composite bed high-temperature gas and its industrial application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1114681C (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101920157A (en) * | 2010-08-17 | 2010-12-22 | 浙江大学 | Detarring and dedusting integration process and device for oil-containing explosive gas |
| CN101935554A (en) * | 2009-06-30 | 2011-01-05 | 通用电气公司 | The gasification system damping of flowing |
| CN101967406A (en) * | 2009-07-27 | 2011-02-09 | 通用电气公司 | Control system and method to operate a quench scrubber system under high entrainment |
| CN103146434A (en) * | 2013-03-05 | 2013-06-12 | 上海锅炉厂有限公司 | Multi-nozzle entrained-flow bed gasification furnace |
| CN103146433A (en) * | 2013-03-05 | 2013-06-12 | 上海锅炉厂有限公司 | Gasifier of entrained-flow bed with single nozzle |
| CN103232863A (en) * | 2013-03-01 | 2013-08-07 | 华东理工大学 | High-temperature gas washing and cooling device |
| CN104357094A (en) * | 2014-11-20 | 2015-02-18 | 水煤浆气化及煤化工国家工程研究中心 | High-efficiency chilling device |
| CN104673405A (en) * | 2013-11-28 | 2015-06-03 | 华东理工大学 | Gas cooling washing device |
| CN106520217A (en) * | 2016-10-26 | 2017-03-22 | 航天长征化学工程股份有限公司 | Dust removal dehydration tower |
-
2001
- 2001-05-15 CN CN 01112880 patent/CN1114681C/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101935554A (en) * | 2009-06-30 | 2011-01-05 | 通用电气公司 | The gasification system damping of flowing |
| US8986403B2 (en) | 2009-06-30 | 2015-03-24 | General Electric Company | Gasification system flow damping |
| CN101935554B (en) * | 2009-06-30 | 2014-12-24 | 通用电气公司 | Gasification system flow damping |
| CN101967406A (en) * | 2009-07-27 | 2011-02-09 | 通用电气公司 | Control system and method to operate a quench scrubber system under high entrainment |
| CN101920157A (en) * | 2010-08-17 | 2010-12-22 | 浙江大学 | Detarring and dedusting integration process and device for oil-containing explosive gas |
| CN103232863B (en) * | 2013-03-01 | 2014-10-08 | 华东理工大学 | High-temperature gas washing and cooling device |
| CN103232863A (en) * | 2013-03-01 | 2013-08-07 | 华东理工大学 | High-temperature gas washing and cooling device |
| CN103146434A (en) * | 2013-03-05 | 2013-06-12 | 上海锅炉厂有限公司 | Multi-nozzle entrained-flow bed gasification furnace |
| CN103146434B (en) * | 2013-03-05 | 2014-11-12 | 上海锅炉厂有限公司 | Multi-nozzle entrained-flow bed gasification furnace |
| CN103146433B (en) * | 2013-03-05 | 2014-09-03 | 上海锅炉厂有限公司 | Gasifier of entrained-flow bed with single nozzle |
| CN103146433A (en) * | 2013-03-05 | 2013-06-12 | 上海锅炉厂有限公司 | Gasifier of entrained-flow bed with single nozzle |
| CN104673405A (en) * | 2013-11-28 | 2015-06-03 | 华东理工大学 | Gas cooling washing device |
| CN104357094A (en) * | 2014-11-20 | 2015-02-18 | 水煤浆气化及煤化工国家工程研究中心 | High-efficiency chilling device |
| CN106520217A (en) * | 2016-10-26 | 2017-03-22 | 航天长征化学工程股份有限公司 | Dust removal dehydration tower |
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|---|---|
| CN1114681C (en) | 2003-07-16 |
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Application publication date: 20011121 Assignee: Yankuang Guohong Chemical Industry Co., Ltd. Assignor: East China University of Science and Technology Contract record no.: 2015310000060 Denomination of invention: Cooling and washing equipment for composite bed high-temperature gas and its industrial application Granted publication date: 20030716 License type: Common License Record date: 20150526 |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20030716 |