CN103343020A - Low-pressure pulverized coal gasification burner - Google Patents
Low-pressure pulverized coal gasification burner Download PDFInfo
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- CN103343020A CN103343020A CN201310228817XA CN201310228817A CN103343020A CN 103343020 A CN103343020 A CN 103343020A CN 201310228817X A CN201310228817X A CN 201310228817XA CN 201310228817 A CN201310228817 A CN 201310228817A CN 103343020 A CN103343020 A CN 103343020A
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Abstract
A provided low-pressure pulverized coal gasification burner comprises an inner ring nozzle, an outer ring nozzle and a cooling-water clamping sleeve; the inner ring nozzle is provided with a central channel inside, and is sleeved by the outer ring nozzle outside, and an annular channel is formed between the inner ring nozzle and the outer ring nozzle; and the cooling-water clamping sleeve comprises a cooling chamber disposed at the burner outlet end, a cooling channel encircling the annular channel and being communicated with the cooling chamber, and a coil-pipe backflow channel encircling the cooling channel and being communicated with the cooling chamber. The burner is long in service life, simple in structure, applicable to synthetic-gas preparation by pulverized-coal gasification, and especially applicable to synthetic-gas preparation process by low-pressure gasification of pulverized coal and pure oxygen. In the same other conditions, carbon conversion rate reaches 99% in the pulverized coal gasification process.
Description
Technical field
The present invention relates to a kind of burner, be specifically related to a kind of low pressure coal gasification burner.
Background technology
Because how the growing tension of petroleum resources effectively utilizes the abundant coal resource of China's reserves to become the important topic of current energy utilization.The gas producing technology of coal mainly contains two kinds at present, and a kind of is the coal water slurry gasification technology, and another kind is the dry coal powder gasification technology.Most of dry coal powder gasification technology is high-pressure gasified technology in the prior art, and facility investment height, running cost height are too heavy for the domestic burden that exists the more medium-sized and small enterprises.Develop efficiently the low pressure bed pulverized coal gasification technology wherein, very crucial problem provides a kind of excellent performance, can be used in the burner that the low pressure coal gasification prepares synthetic gas.
The coal gasification burner places top of gasification furnace, and the top intensity of combustion is big, easily causes the furnace roof overtemperature, influences the life-span of vapourizing furnace.Gasification furnace coal burner front end combustion flame temperature is very high in the coal gasification, and the oxygen enrichment corrosive environment of burner front end also easily causes damage to burner, thereby reduces work-ing life.In addition, if operation is unstable in the gasification, flame moves on the high-temperature zone, causes near the heat of burner very concentrated, can cause the burner surface to produce the high temperature oxidation and corrosion crackle.After the fine coal burner burns, cause annular space overtemperature in the vapourizing furnace stove, the water wall dross is damaged in the stove, and direct result is that insulation destroys in the stove, and the furnace wall is impaired, finally causes production load shedding or system shutdown, and this causes very big threat to equipment and ordinary production.
In addition, the improper or burner of nozzle structure and vapourizing furnace do not match, and can cause refluxing or the frequent generation of entrainment phenomenon, and the easier scaling loss of burner head and furnace roof causes load shedding production or system to stop in emergency.
In coal gasification goes into operation process, monitor closely burner cooling water outlet temperature, can monitor burner by the CO content in the real-time monitoring burner water coolant or turnover cooling water flow simultaneously and whether burn leakage.In case abnormal conditions occur, take treatment measures immediately.
Chinese patent application number is the burning burner that 200610030864.3 patent application discloses a kind of dry coal powder pressure gasifying stove, be provided with one along the burner longitudinal axis and have the centre channel of outlet, for delivery of fuel, with the coaxial annular oxygen channel that arranges of centre channel, the coaxial cooling channel that has a helical channel that arranges at burner discharge end and center, be used for flow-through fluid, the burner end is cooled off.But the helical channel that this device arranges in nozzle cooling passage is made of a spirrillum muscle wing that revolves, and difficulty of processing is big.Described technology burner cooling chamber difficulty of processing is big, and the fluid inlet of cooling chamber and liquid outlet position are easy to generate the dead angle, the out-of-date generation of cooled liquid stream recirculating zone, reduced the heat exchange effect, easy local superheating, the too much heat of local generation, cooling performance is not good enough herein, and the burner head damages easily.
Summary of the invention
Purpose of the present invention provides a kind of low pressure fine coal gasification process burner, by the burner head being carried out fully effectively cooling and protection, prolongs its work-ing life.
Realize a kind of low pressure fine coal gasification process of the object of the invention burner, ring spray 1, outer shroud shower nozzle 2 and cooling water jecket 3 in comprising, be provided with centre channel 11 in the interior ring spray 1, in described outer shroud shower nozzle 2 is enclosed within outside the ring spray 1, formation annular channel 21 between interior ring spray 1 and the cooling water jecket 3.
Described cooling water jecket 3 comprises cooling channel 31, cooling chamber 32 and coil pipe return flow line 33, described cooling chamber 32 is located at the burner exit end, described cooling channel 31 is communicated in cooling chamber 32 and around annular channel 21, and described coil pipe return flow line 33 is communicated in cooling chamber 32 and around cooling channel 31.
33 outsides, described coil pipe return flow line are provided with thermofin.
Described annular channel 21 and centre channel 11 coaxial settings, in an acute angle with axis.
Be provided with the protective layer that the high temperature mould material is made outside the described cooling water jecket 3.
Outside, described coil pipe return flow line is provided with thermofin.
Use beneficial effect of the present invention: the burner among the present invention, simple in structure, long service life can be used in coal gasification and prepares synthetic gas, especially can be used for the process that fine coal and pure oxygen low pressure gasifying prepare synthetic gas.Adopt burner of the present invention, under the identical situation of other conditions, efficiency of carbon conversion can reach 99% in the coal gasification process.
Description of drawings
Fig. 1: coal gasification burner sectional view of the present invention;
Fig. 2: cooling water jecket sleeve pipe sketch;
Fig. 3: low pressure coal gasification nozzle structure figure.
Interior ring spray head-1 outer shroud shower nozzle-2 cooling water jecket-3
Centre channel-11 annular channel-21 cooling channel-31
Cooling chamber-32 dish type return flow line-33
Embodiment
For better explanation the present invention, below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described.
Burner shown in Figure 1 arranges an annular channel 21 with centre channel 11 is coaxial, becomes certain acute angle and the fuel crossover of sending into from centre channel with the longitudinal axis, can allow vaporized chemical and fuel mix more even, the raising gasification efficiency.The material that flows in the annular channel 21 comprises steam and oxygen, and two kinds of same passages of gas can improve the gas velocity that gas mixture is gone into stove, is conducive to mixing of vaporized chemical and fuel, and the disperse of coal dust and then be conducive to improve transformation efficiency.
Adopt two passage burners, burner is installed at top of combustion chamber, and is provided with cooling water jecket, has increased the protective layer made from the high temperature mould material outside water jacket.
The water entry of water jacket is an annular cooling channel 31 around the outer shroud shower nozzle as shown in Figure 2; Water jacket is provided with a cooling chamber 32 in nozzle leading portion face, annular cooling channel 31 is attached thereto; The water exit of described water jacket is one around annular cooling channel and be communicated in the coil pipe return flow line 33 of front end cooling chamber as shown in Figure 3.The coil pipe return flow line 33 outside thermofins that increase form protective guard, absorb the high heat in coal burner place when burner is worked, and protection coal burner is not because of overheated scaling loss.
This burner can be used for coal gasification and prepare synthetic gas by means of airflow bed gasification furnace.During use, feed a certain proportion of coal dust and carrier gas, oxygen, superheated vapour, wherein coal dust and carrier gas enter from the top of burner centre pipe, after oxygen and superheated vapour mix together the outer shroud pipeline from burner enter, spray into vapourizing furnace then simultaneously.
This burner has been taked sfgd.s such as cooling water jecket and thermofin, and simultaneously the inner fine coal fluid of burner has been taked particle diameter and speed control, inert atmosphere protection, etc. these all can effectively protect and prolong burner work-ing life itself.Certainly, stabilize oxygen coal ratio in the operation avoids instantaneous local oxygen enrichment overtemperature very important, but topmost bigger quantity of circulating water and the low vaporization rate of still guaranteeing in time removed heat and prevented that local superheating is only key.
Burner among the present invention, simple in structure, can be used in coal gasification and prepare synthetic gas, especially can be used for the process that fine coal and pure oxygen low pressure gasifying prepare synthetic gas.Adopt burner of the present invention, under the identical situation of other conditions, efficiency of carbon conversion can reach 99% in the coal gasification process.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (5)
1. low pressure fine coal gasification process burner, it is characterized in that, ring spray head (1), outer shroud shower nozzle (2) and cooling water jecket (3) in comprising, be provided with centre channel (11) in the interior ring spray head (1), in being enclosed within, described outer shroud shower nozzle (2) outside the ring spray head (1), forms annular channel (21) between interior ring spray head (1) and the outer shroud shower nozzle (2).
2. low pressure fine coal gasification process burner according to claim 1, it is characterized in that, described cooling water jecket (3) comprises cooling channel (31), cooling chamber (32) and coil pipe return flow line (33), described cooling chamber (32) is located at the burner exit end, described cooling channel (31) is communicated in cooling chamber (32) and around annular channel (21), and described coil pipe return flow line (33) is communicated in cooling chamber (32) and around cooling channel (31).
3. low pressure fine coal gasification process burner according to claim 1 is characterized in that, outside, described coil pipe return flow line (33) is provided with thermofin.
4. low pressure fine coal gasification process burner according to claim 1 is characterized in that, described annular channel (21) and the coaxial setting of centre channel (11) are in an acute angle with axis.
5. low pressure fine coal gasification process burner according to claim 1 is characterized in that, is provided with the protective layer that the high temperature mould material is made outside the described cooling water jecket (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310228817XA CN103343020A (en) | 2013-06-08 | 2013-06-08 | Low-pressure pulverized coal gasification burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310228817XA CN103343020A (en) | 2013-06-08 | 2013-06-08 | Low-pressure pulverized coal gasification burner |
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| CN103343020A true CN103343020A (en) | 2013-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310228817XA Pending CN103343020A (en) | 2013-06-08 | 2013-06-08 | Low-pressure pulverized coal gasification burner |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US475303A (en) * | 1892-05-24 | John r | ||
| CN1261910A (en) * | 1997-07-01 | 2000-08-02 | 德士古发展公司 | Fuel injector nozzle with protective refractory insert |
| CN1916493A (en) * | 2006-09-06 | 2007-02-21 | 中国船舶重工集团公司第七一一研究所 | Combustion nozzle of gasification stove of using pressed dry coal powder |
| CN201390733Y (en) * | 2009-04-21 | 2010-01-27 | 中国船舶重工集团公司第七一一研究所 | Powdered coal gasification furnace start-up burner taking combustible gas as fuel |
| CN202022898U (en) * | 2011-03-30 | 2011-11-02 | 西安拓沃能动科技有限公司 | Compressing and gasifying burner nozzle for dry pulverized coal |
| CN102278753A (en) * | 2011-06-16 | 2011-12-14 | 西安拓沃能动科技有限公司 | Combustor for water-coal-slurry pressurized gasifier |
| CN203319949U (en) * | 2013-06-08 | 2013-12-04 | 北京神雾环境能源科技集团股份有限公司 | Low-pressure powdered coal gasification burner |
-
2013
- 2013-06-08 CN CN201310228817XA patent/CN103343020A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US475303A (en) * | 1892-05-24 | John r | ||
| CN1261910A (en) * | 1997-07-01 | 2000-08-02 | 德士古发展公司 | Fuel injector nozzle with protective refractory insert |
| CN1916493A (en) * | 2006-09-06 | 2007-02-21 | 中国船舶重工集团公司第七一一研究所 | Combustion nozzle of gasification stove of using pressed dry coal powder |
| CN201390733Y (en) * | 2009-04-21 | 2010-01-27 | 中国船舶重工集团公司第七一一研究所 | Powdered coal gasification furnace start-up burner taking combustible gas as fuel |
| CN202022898U (en) * | 2011-03-30 | 2011-11-02 | 西安拓沃能动科技有限公司 | Compressing and gasifying burner nozzle for dry pulverized coal |
| CN102278753A (en) * | 2011-06-16 | 2011-12-14 | 西安拓沃能动科技有限公司 | Combustor for water-coal-slurry pressurized gasifier |
| CN203319949U (en) * | 2013-06-08 | 2013-12-04 | 北京神雾环境能源科技集团股份有限公司 | Low-pressure powdered coal gasification burner |
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Application publication date: 20131009 |