CN102492477B - Hierarchical oxygen supply and controllable flame coal water slurry entrained bed combined nozzle - Google Patents
Hierarchical oxygen supply and controllable flame coal water slurry entrained bed combined nozzle Download PDFInfo
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Abstract
The invention relates to a hierarchical oxygen supply and controllable flame coal water slurry entrained bed combined nozzle which is arranged on a gasification furnace. The hierarchical oxygen supply and controllable flame coal water slurry entrained bed combined nozzle comprises a main fuel nozzle which is arranged at the top of a furnace, two steam nozzles which are arranged at the two sides of a furnace arch and two oxygen supply nozzles which are horizontally arranged in a hedging manner, wherein the nozzles are respectively connected with a coal water slurry source, an oxygen source and a steam source, and the openings of the nozzles lead into a hearth of the gasification furnace. According to the invention, an advanced temperature control technology combining a grading oxygen supply temperature control technology and a steam temperature control technology is adopted, combustion intensity and flame temperature in the furnace are effectively reduced, and the aim that ash at the outlet of the gasification chamber is non-fused solid slag; meanwhile, gasification reaction rate and carbon conversion rate are improved, thus gasification solid deslagging on a 'double high' coal type large-scale pressurization entrained bed in China is realized, and the hierarchical oxygen supply and controllable flame coal water slurry entrained bed combined nozzle provided by the invention is especially applicable to industrial application of a high-ash (25-27%) and high-ash-fusing-point (FT is more than 1400 DEG C) coal type large-scale gasification device in China.
Description
Technical field
The present invention relates to a kind of tuyere arrangement, relate in particular to and a kind ofly can realize high ash, the classification oxygen supply of the dry deslagging of high ash melting point coal seed, the coal water slurry entrained flow bed built up nozzle of controllable flame, belong to coal gas coal technical field.
Background technology
Extensive pressurized entrained-bed Coal Gasification Technology is the core of following clean coal technology, it is the basis of the industry such as development coal-based Chemicals (synthetic ammonia, methyl alcohol processed, dme etc.), coal-based Poly-generation, IGCC generating, extensive hydrogen manufacturing, fuel cell, be core technology and the leading technology that realizes the coal-based high efficient energy sources system of pollutent near zero release, represented the developing direction of current Coal Gasification Technology.The large-scale pressurized entrained-bed coal gasifying process such as current Texaco, E-gas, Shell, Prenflo and GSP have been realized the Industrial demonstration of 2000t/d scale, and reach commercial level.But above-mentioned pressurized air flow bed gasification technology all adopts slag tap mode, to entering the grey melt temperature of stove coal, there is strict requirement, general requirement coal ash melting temperature FT is lower than below 1400 ℃, otherwise must add fusing assistant or improve the needs that gasification temperature meets slag tap technique, adopt that above-mentioned two kinds of measures are corresponding has increased bed drain purge, deslagging thermosteresis, oxygen consumption, the work-ing life of simultaneously having reduced vapourizing furnace.
China's steam coal has " two high " feature of high ash (average ash content reaches 25～27%), high ash melting point (1400 ℃ of FT >), and high-ash-fusion coal accounts for 55% and 57% left and right of coal in China output and retained reserve." two high " coal cannot meet the deslagging processing requirement of existing slag tap type pressurized air flow bed gasification technology in a large number.For existing slag tap type pressurized air flow bed gasification technology, cannot be suitable for the difficult problem of a large amount of " two high " coals of China, exploitation is applicable to the novel classification oxygen supply of China's " two high " dry deslagging of coal, the coal water slurry entrained flow bed built up nozzle of controllable flame, can make up the deficiency of existing slag tap type pressurized air flow bed gasifying apparatus inapplicable " two high " coal, expand the subject range of pressurized air flow bed gasification technology to coal, to promoting extensive pressurized air flow bed gasification technology in the large-area applications of China, realize Coal Clean, efficient utilization is of great practical significance and vast potential for future development.
Summary of the invention
The present invention is directed to prior art above shortcomings, a kind of classification oxygen supply, the coal water slurry entrained flow bed built up nozzle of controllable flame are provided, by the comprehensive action of nozzle, guarantee that stove internal combustion regional temperature is lower than at least 100 ℃ of coal ash melting temperatures, the solid slag that the lime-ash that guarantees vaporizer outlet is non-melting, thus reach the object of the dry deslagging of controllable flame.
For realizing above object, the present invention solves its technical problem by following technical solution:
A kind of classification oxygen supply, the coal water slurry entrained flow bed built up nozzle of controllable flame, be installed on vapourizing furnace, it comprises a main fuel spray nozzle, two steam jet and two 2 sections of oxygen supply nozzles, described main fuel spray nozzle is positioned at described top of gasification furnace, and opening leads in this vapourizing furnace burner hearth, this main fuel spray nozzle connects coal water slurry source simultaneously, source of oxygen and source of water vapor, described two steam jet are symmetrically arranged on the both sides of described fuel oil atomizer below vapourizing furnace chimney arch, and connect source of oxygen and source of water vapor and opening simultaneously and lead in vapourizing furnace burner hearth, before and after described two 2 sections of oxygen supply nozzles, each ground is positioned at this steam jet below, and coaxial water level land opening is oppositely arranged, these two 2 sections of oxygen supply nozzles connect source of oxygen and source of water vapor and opening simultaneously and lead in vapourizing furnace burner hearth.
Classification oxygen supply of the present invention, the coal water slurry entrained flow bed built up nozzle of controllable flame, the dead in line of the axis of its main fuel spray nozzle and described vapourizing furnace burner hearth, the axis angle α of the axis of described two steam jet and described vapourizing furnace burner hearth is 35 °～65 °, and the axis of described two 2 sections of oxygen supply nozzles and the space angle that axis becomes of this two steam jet are 90 ° and perpendicular to the axis of described vapourizing furnace burner hearth, described main fuel spray nozzle is by core jet pipe, an outer ring spray pipe, outer two ring spray pipes and outer three ring spray pipes form the layer overlaps structure of coaxial four-way, this core jet pipe Nei space forms the centre channel that passes into oxygen, annular space space between this core jet pipe outer wall and an outer ring spray inside pipe wall forms an outer ring passage that passes into coal water slurry, annular space space between this outer ring spray pipe outer wall and outer two ring spray inside pipe walls forms the outer two ring passages that pass into water vapour, annular space space between these outer two ring spray pipe outer walls and outer three ring spray inside pipe walls forms the outer three ring passages that pass into oxygen, described core jet pipe, an outer ring spray pipe, the tube wall of the head of outer two ring spray pipes and outer three ring spray pipes is gradually-reducing shape and forms respectively the center shower nozzle of opening, an outer ring spray head, outer two ring spray heads and outer three ring spray heads, the interior angle of throat A of described center shower nozzle inwall is 15 °～60 °, and the outside angle of inclination B of its outer wall is 30 °～60 °, the interior angle of throat A1 of a described outer ring spray inwall is 30 °～60 °, and the outside angle of inclination B 1 of its outer wall is 20 °～80 °, the interior angle of throat A2 of a described outer two ring sprays inwall is 30 °～60 °, and the outside angle of inclination B 2 of its outer wall is 20 °～80 °, the interior angle of throat A3 of a described outer three ring sprays inwall is 30 °～60 °, and the outside angle of inclination B 3 of its outer wall is 20 °～80 °, the tube wall of described two steam jet and two 2 sections of oxygen supply nozzle heads is gradually-reducing shape, described oxygen sprays into the burner hearth of described vapourizing furnace after mixing in described two steam jet and two 2 sections of oxygen supply nozzles with water vapour, the oxygen-supplying amount of described two 2 sections of oxygen supply nozzles accounts for 15%～25% of whole oxygen-supplying amounts.
Principle of work of the present invention is, the technical measures that adopt classification oxygen supply temperature control to combine with water vapour temperature control, and (can regulate in time oxygen/coal ratio based on synthesis gas composition in stove in conjunction with necessary advanced automatic control means, one section/bis-sections oxygen supply ratios, spray into steam vapour amount to prevent the generation of the high temperature of moment in stove), reach the sharp cutting edge of a knife or a sword temperature distribution of scabbling stove internal combustion region, extend stove internal combustion region, reduce the object of intensity of combustion and flame temperature, guarantee that stove internal combustion regional temperature is lower than following 100 ℃ of coal ash melting temperature, thereby the solid slag that the lime-ash that guarantees vaporizer outlet is non-melting, prevent that vaporizer outlet from slagging scorification occurring, latch up phenomenon, the impinging jet effect of two two sections of oxygen supply nozzles simultaneously arranging by two steam jet and its lower horizontal of chimney arch both sides, also can further strengthen Coal Char Particles and the mixture strength of vaporized chemical and the broken probability of the surperficial grey shell of coal tar in stove, greatly extend the mean residence time of Coal Char Particles in combustion zone, improved to a considerable extent gasification reaction speed and efficiency of carbon conversion.
Classification oxygen supply of the present invention, the comprehensive temperature adjustment technology that adopts two sections of oxygen supply temperature control techniques, water vapour temperature control technique and change timely adjusting oxygen supply-water vapour flow based on synthesis gas composition in stove of the coal water slurry entrained flow bed built up nozzle of controllable flame, effectively reduced intensity of combustion and the flame temperature in stove, all the time controlled stove internal combustion regional temperature lower than at least 100 ℃ of coal ash melting temperatures, thereby the lime-ash that has reached vaporizer outlet is the object of non-melting solid slag; Strengthen the broken probability of the grey shell of mixture strength and coal tar surface of Coal Char Particles and vaporized chemical simultaneously, thereby improved gasification reaction speed and efficiency of carbon conversion.
The invention solves existing slag tap type gasification furnace of pressurized aerated bed and use a series of difficult problems such as deslagging difficulty that China's " two high " coal faces, expand the subject range of pressurized air flow bed gasification technology to China's " two high " coal, realized the industrial application of China's " two high " coal on extensive pressurized air flow bed gasifying apparatus.The present invention can meet the needs of the extensive gasification of a large amount of " two high " coals of China, has higher efficiency of carbon conversion and cold gas efficiency, and day output can reach 2000t/d left and right, has very important reality and industrial application meaning.
Accompanying drawing explanation
Fig. 1 is system architecture schematic diagram of the present invention.
Fig. 2 is the sectional view of main fuel spray nozzle of the present invention.
Fig. 3 is the partial enlarged drawing of Fig. 2.
Fig. 4 is the installation site schematic diagram of two sections of steam jet of the present invention.
In figure,
1 main fuel spray nozzle, 2 steam jet, 3 two sections of oxygen supply nozzles, 4 outer three ring passages, 5 outer two ring passages, 6 outer ring passages, 7 centre channels, 8 core jet pipes, 9 outer ring spray pipes, 10 outer two ring spray pipes,
11 outer three ring spray pipes, 12 outer three ring spray heads, 13 outer ring spray Tou， 14 center shower nozzles, 15 outer two ring spray heads;
Angle of throat in the shower nozzle of A center, the outer side rake angle of B center shower nozzle, angle of throat in the outer ring spray head of A1,
The outer side rake angle of the outer ring spray head of B1, angle of throat in the outer two ring spray heads of A2, the outer side rake angle of the outer two ring spray heads of B2,
Angle of throat in the outer three ring spray heads of A3, the outer side rake angle of the outer three ring spray heads of B3,
The axis angle of α steam jet and vapourizing furnace.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are elaborated, the present embodiment be take technical solution of the present invention and under prerequisite, has been provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited only to following embodiment.
As shown in Figure 1, classification oxygen supply of the present invention, the coal water slurry entrained flow bed built up nozzle of controllable flame are installed on vapourizing furnace, it comprises 1, two steam jet 2 of single main fuel spray nozzle and two two sections of oxygen supply nozzles 3, reaches the object of the dry deslagging of controllable flame by the comprehensive action of five nozzles.
Described main fuel spray nozzle 1 is positioned at the top of vapourizing furnace, and its opening leads in this vapourizing furnace burner hearth, and the axis of this main fuel spray nozzle 1 overlaps with the vertical axis of vapourizing furnace burner hearth.Described main fuel spray nozzle 1 connects coal water slurry source, source of oxygen and source of water vapor simultaneously, with injection water coal slurry in vapourizing furnace burner hearth, one section of oxygen and water vapour.Refer to Fig. 2, described main fuel spray nozzle 1 is comprised of core jet pipe 8, an outer ring spray pipe 9, outer two ring spray pipes 10 and outer three ring spray pipes 11, and this four jet pipe 8,9,10 and 11 concentric layer overlaps form the structure of coaxial four-way.These core jet pipe 8 Nei spaces form centre channel 7, and this centre channel 7 is in order to pass into oxygen; Annular space space between the inwall of the outer wall of this core jet pipe 8 and an outer ring spray pipe 9 forms an outer ring passage 6, and this outer ring passage 6 is in order to pass into coal water slurry; Equally, annular space space between the inwall of the outer wall of this outer ring spray pipe 9 and outer two ring spray pipes 10 forms the outer two ring passages 5 that pass into water vapour, and the annular space space between the outer wall of these outer two ring spray pipes 10 and the inwall of outer three ring spray pipes 11 forms the outer three ring passages 4 that pass into oxygen.The tube wall of the head of described core jet pipe 8, an outer ring spray pipe 9, outer two ring spray pipes 10 and outer three ring spray pipes 11 is gradually-reducing shape and is provided with opening, and this four jet pipe 8,9,10 and 11 head form respectively the center shower nozzle 14 of nozzle arrangements, an outer ring spray 13, outer two ring sprays 15 and outer three ring sprays 12.Refer to Fig. 3, the interior angle of throat A of described center shower nozzle 14 inwalls is 15 °～60 ° again, and the outside angle of inclination B of its outer wall is 30 °～60 °; The interior angle of throat A1 of a described outer ring spray 13 inwall is 30 °～60 °, and the outside angle of inclination B 1 of its outer wall is 20 °～80 °; The interior angle of throat A2 of described outer two ring sprays, 15 inwall is 30 °～60 °, and the outside angle of inclination B 2 of its outer wall is 20 °～80 °; The interior angle of throat A3 of described outer three ring sprays, 12 inwall is 30 °～60 °, and the outside angle of inclination B 3 of its outer wall is 20 °～80 °.
Refer to again Fig. 4, two described steam jet 2 are symmetrically arranged at the below of described fuel oil atomizer 1, be distributed in the both sides of vapourizing furnace chimney arch, this two steam jet 2 connects source of oxygen and source of water vapor simultaneously, and opening leads in vapourizing furnace burner hearth, two steam jet 2 is interior sprays into the burner hearth of described vapourizing furnace after mixing at this for two sections of oxygen and water vapour.The axis angle α of the axis of described two steam jet 2 and described vapourizing furnace burner hearth is 35 °～65 °, and concrete angle is adjusted in above-mentioned scope according to factors such as the type of furnaces.The tube wall of described two steam jet 2 heads is gradually-reducing shape and is provided with opening, at this shower nozzle end openings place, has been evenly arranged throttle orifice.
Each ground, two two sections described oxygen supply nozzle 3 front and back is positioned at the below of steam jet 2, and these two 2 sections of oxygen supply nozzle 3 openings relatively, same level axis ground arranges, its axis and the space angle that axis becomes of this two steam jet 2 are 90 ° and perpendicular to the axis of described vapourizing furnace burner hearth.These two 2 sections of oxygen supply nozzles 3 connect source of oxygen and source of water vapor simultaneously, and opening leads in vapourizing furnace burner hearth, two sections of oxygen spray into the burner hearth of described vapourizing furnace after interior mixing at these two 2 sections of oxygen supply nozzles 3 with water vapour, the oxygen-supplying amount of described two 2 sections of oxygen supply nozzles 3 accounts for 15%～25% of whole oxygen-supplying amounts.。The tube wall of two 2 sections of oxygen supply nozzle 3 heads is gradually-reducing shape and is provided with opening, at this shower nozzle end openings place, has been evenly arranged throttle orifice.
When classification oxygen supply of the present invention, the coal water slurry entrained flow bed built up nozzle work of controllable flame, the flow process that coal water slurry is carried is: adopt together with coal water slurry that concentration is 40%～70% and one section of oxygen (account for oxygen supply total amount 80%), water vapour and enter vapourizing furnace by being positioned at the main fuel spray nozzle 1 of top of gasification furnace, breeze airflow is heated rapidly by high temperature reflux gas, the processes such as the partial combustion of generation devolatilization, pyrolysis product burning and coal tar and gasification reaction; Two sections of oxygen mix by the steam jet 2 of chimney arch both sides and two sections of oxygen supply nozzles 3 of below and fill in time with certain proportion with water vapour, the water vapour spraying into can be controlled temperature in stove effectively, avoid the formation of Local Instantaneous high temperature, there is gas-phase reaction in the oxygen spraying into and pyrolysis product, synthetic gas etc., forms secondary high-temperature district so that coal tar-CO to be provided
2/ H
2the main required heat of gasification reaction such as O; After abundant gasification reaction, raw gas and lime-ash together leave vaporizer and enter follow-up link.
The present invention combines with water vapour temperature control by classification oxygen supply flame temperature is controlled at and is no more than following 100 ℃ of coal ash melting temperature, the needs of the extensive gasification of a large amount of " two high " coals of China (high ash (ash content 25～27%), high ash melting point (1400 ℃ of FT >)) have been met.
The present invention has taked following three measures, has reached the technique effect of expection:
First, classification oxygen supply temperature control: main fuel spray nozzle 1 and two sections of oxygen supply nozzle 3 classification oxygen supplys, the oxygen supply ratio approximately 80% of main fuel spray nozzle 1, thereby the amount of oxygen that makes main fuel spray nozzle 1 place is broken away from the oxidation of coal of reaction in furnace and is learned equivalence ratio constraint, coal dust firing initial reaction stage oxygen quantity not sufficient, combustion zone temperature lower (being controlled at following 100 ℃ of coal ash melting temperature), residue oxygen amount is filled in time by two sections of oxygen supply nozzles 3, there is gas-phase reaction in oxygen and pyrolysis product, synthetic gas etc., forms secondary high-temperature district so that coal tar-CO to be provided
2/ H
2the heat that the gasification reactions such as O are required; By regulating the ratio between one section of oxygen supply and two sections of oxygen supplys, can further realize at oxygen/coal the adjusting of stove internal combustion regional temperature in 150 ℃ of temperature ranges than remain unchanged in the situation that.
The second, water vapour temperature control: a water vapour part that enters vapourizing furnace enters vapourizing furnace by the outer two ring passages 5 of main fuel spray nozzle 1, has reduced the temperature of main fuel spray nozzle 1 end, effectively the prolonging nozzle life-span; All the other water vapour with two sections of oxygen mix after from steam jet 2 and two sections of oxygen supply nozzles 3, enter vapourizing furnace respectively, elongated combustion flame, improved vapourizing furnace temperature of lower, in vapourizing furnace, temperature distribution is more even, thereby realizes the control to cool water mixture burning flame.By timely adjusting water vapour flow, can prevent the generation of stove high temperature of interior moment, guarantee that in-furnace dust slag is the solid slag of non-melting.
The 3rd, based on gas composition in stove, regulate oxygen supply/water vapour: be stove internal combustion regional temperature too high (higher than coal ash melting temperature) and the part coal ash generation melting phenomenon that prevents from causing because moment O/C mol ratio is excessive in operational process, adopt advanced automatic control means, according to the variation of vapourizing furnace exit synthesis gas composition, regulate in time oxygen/coal ratio, one section of oxygen supply and two sections of oxygen supplys (also can suitably increase water vapour straying quatity if desired), adjust in time gasification temperature in stove, make gasification temperature long-term stability lower than entering below stove coal ash melting temperature 100 ℃, guarantee that dry deslagging is long-term, safety, stable carrying out.
Claims (7)
1. a classification oxygen supply, the coal water slurry entrained flow bed built up nozzle of controllable flame, be installed on vapourizing furnace, it is characterized in that: described built up nozzle comprises a main fuel spray nozzle, two steam jet and two 2 sections of oxygen supply nozzles, described main fuel spray nozzle is positioned at described top of gasification furnace, and opening leads in this vapourizing furnace burner hearth, this main fuel spray nozzle connects coal water slurry source simultaneously, source of oxygen and source of water vapor, described two steam jet are symmetrically arranged on the both sides of described main fuel spray nozzle below vapourizing furnace chimney arch, and connect source of oxygen and source of water vapor and opening simultaneously and lead in vapourizing furnace burner hearth, before and after described two 2 sections of oxygen supply nozzles, each ground is positioned at this steam jet below, and coaxial water level land opening is oppositely arranged, these two 2 sections of oxygen supply nozzles connect source of oxygen and source of water vapor and opening simultaneously and lead in vapourizing furnace burner hearth.
2. classification oxygen supply according to claim 1, the coal water slurry entrained flow bed built up nozzle of controllable flame, it is characterized in that: the dead in line of the axis of described main fuel spray nozzle and described vapourizing furnace burner hearth, the axis angle α of the axis of described two steam jet and described vapourizing furnace burner hearth is 35 °～65 °, and the axis of described two 2 sections of oxygen supply nozzles and the space angle that axis becomes of this two steam jet are 90 ° and perpendicular to the axis of described vapourizing furnace burner hearth.
3. classification oxygen supply according to claim 1 and 2, the coal water slurry entrained flow bed built up nozzle of controllable flame, it is characterized in that: described main fuel spray nozzle is by core jet pipe, an outer ring spray pipe, outer two ring spray pipes and outer three ring spray pipes form the layer overlaps structure of coaxial four-way, this core jet pipe Nei space forms the centre channel that passes into oxygen, annular space space between this core jet pipe outer wall and an outer ring spray inside pipe wall forms an outer ring passage that passes into coal water slurry, annular space space between this outer ring spray pipe outer wall and outer two ring spray inside pipe walls forms the outer two ring passages that pass into water vapour, annular space space between these outer two ring spray pipe outer walls and outer three ring spray inside pipe walls forms the outer three ring passages that pass into oxygen, described core jet pipe, an outer ring spray pipe, the tube wall of the head of outer two ring spray pipes and outer three ring spray pipes is gradually-reducing shape and forms respectively the center shower nozzle of opening, an outer ring spray head, outer two ring spray heads and outer three ring spray heads.
4. classification oxygen supply according to claim 3, the coal water slurry entrained flow bed built up nozzle of controllable flame, is characterized in that: the interior angle of throat A of described center shower nozzle inwall is 15 °～60 °, and the outside angle of inclination B of its outer wall is 30 °～60 °; The interior angle of throat A1 of a described outer ring spray inwall is 30 °～60 °, and the outside angle of inclination B 1 of its outer wall is 20 °～80 °; The interior angle of throat A2 of a described outer two ring sprays inwall is 30 °～60 °, and the outside angle of inclination B 2 of its outer wall is 20 °～80 °; The interior angle of throat A3 of a described outer three ring sprays inwall is 30 °～60 °, and the outside angle of inclination B 3 of its outer wall is 20 °～80 °.
5. classification oxygen supply according to claim 1, the coal water slurry entrained flow bed built up nozzle of controllable flame, is characterized in that: the tube wall of described two steam jet and two 2 sections of oxygen supply nozzle heads is gradually-reducing shape.
6. classification oxygen supply according to claim 1, the coal water slurry entrained flow bed built up nozzle of controllable flame, is characterized in that: described oxygen sprays into the burner hearth of described vapourizing furnace after mixing in described two steam jet and two 2 sections of oxygen supply nozzles with water vapour.
7. classification oxygen supply according to claim 1, the coal water slurry entrained flow bed built up nozzle of controllable flame, is characterized in that: the oxygen-supplying amount of described two 2 sections of oxygen supply nozzles accounts for 15%～25% of whole oxygen-supplying amounts.
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| CN102977926B (en) | 2012-11-28 | 2014-04-16 | 华东理工大学 | Hot oxygen nozzle and application thereof in gasification furnace |
| CN103387851B (en) * | 2013-06-25 | 2015-12-23 | 上海尧兴投资管理有限公司 | Waste heat boiler-type gasifier |
| CN104896501B (en) * | 2015-06-05 | 2016-04-20 | 华中科技大学 | The low NO of a kind of coal dust xoxygen-enriched burning device |
| CN108192668B (en) * | 2017-12-28 | 2020-05-26 | 陕西延长石油（集团）有限责任公司 | Oxygen-coal ratio control method |
| CN112852493A (en) * | 2019-11-28 | 2021-05-28 | 华东理工大学 | Method and equipment for preparing synthesis gas by gasifying hard asphalt powder |
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| CN1054080C (en) * | 1995-09-07 | 2000-07-05 | 华东理工大学 | Three-way channel combined water coal slurry gasification nozzle with cyclone |
| CN2460865Y (en) * | 2001-01-09 | 2001-11-21 | 华东理工大学 | Multi-nozzle opposed water-coal or coal dust gasification furnace with nozzle on top |
| CN102003711A (en) * | 2009-09-02 | 2011-04-06 | 西安拓沃能动科技有限公司 | Spout structure used for prolonging service life of reforming burner tip |
| CN101985568B (en) * | 2010-10-02 | 2013-05-01 | 上海交通大学 | Two-stage oxygen supply dry slag removal pressurized gas flow bed gasification furnace |
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