CN105132037A - Pulverized coal gasifier burner - Google Patents
Pulverized coal gasifier burner Download PDFInfo
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- CN105132037A CN105132037A CN201510579027.5A CN201510579027A CN105132037A CN 105132037 A CN105132037 A CN 105132037A CN 201510579027 A CN201510579027 A CN 201510579027A CN 105132037 A CN105132037 A CN 105132037A
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- pulverized coal
- feed channel
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- protection feed
- vaporized chemical
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Abstract
The invention relates to a burner, in particular to a pulverized coal gasifier burner and aims at solving the problems that the manufacturing process of a cyclone burner in the prior art is complex; the manufacturing cost is high; the disassembling, assembly and maintenance are not convenient to perform and the service life is short. The pulverized coal gasifier burner comprises at least one layer of protection gas pipeline, a gasifying agent pipeline, a pulverized coal pipeline, a first cyclone blade, a second cyclone blade and a flange, wherein the gasifying agent pipeline sleeves the external portion of the at least one layer of protection gas pipeline; the pulverized coal pipeline sleeves the external portion of the gasifying agent pipeline; the flange sleeves the outer side wall of the pulverized coal pipeline; the first cyclone blade is arranged between the outer side wall of the at least one layer of protection gas pipeline and the inner side wall of the gasifying agent pipeline; the second cyclone blade is arranged between the outer side wall of the gasifying agent pipeline and the inner side wall of the pulverized coal pipeline; the top end of the pulverized coal pipeline is provided with a pulverized coal flow inlet; the top end of the gasifying agent pipeline is provided with a gasifying agent inlet, and the top end of the at least one layer of protection gas pipeline is provided with a protection gas inlet. The pulverized coal gasifier burner is used in a coal gasifying device.
Description
Technical field
The present invention relates to a kind of burner, be specifically related to a kind of pulverized coal gasification furnace burner.
Background technology
Coal is a kind of important energy, but for a long time, coal is in use along with serious problem of environmental pollution.In recent years, the clean coal technology for the purpose of decreasing pollution discharge and raising utilising efficiency is day by day by people are paid attention to; And Coal Gasification Technology is the clean coal technology of high-efficiency cleaning.Burner is the key part of coal gasification apparatus.Burner is in hot environment for a long time, very easily scaling loss, and burner is once scaling loss, and gasification installation must stop, and causes tremendous economic to lose to enterprise.
Chinese invention patent application publication number CN1710333A discloses a kind of turbulent burner, its radial direction by interior outward successively coaxial line arrange the cold chuck of tertiary effluent.First step water-cooling jacket center is igniter fuel pipeline and high-energy firing gun; Be vaporized chemical pipeline between first, second grade of water-cooling jacket, in vaporized chemical pipeline, be provided with swirl vane; 2-5 root coal pipe is uniformly distributed along the circumference in the middle of second, third grade of water-cooling jacket, rotates and is wrapped on the outer wall of second stage water-cooling jacket.This turbulent burner vaporized chemical and coal dust all adopt the mode of eddy flow to spray into be conducive to both mixing; Tertiary effluent cold chuck is housed in burner, can available protecting burner, improve burner work-ing life.But it has following shortcoming: the cold chuck of 1 tertiary effluent makes burner manufacturing process complicated, and processing and manufacturing cost significantly improves; 2 dismounting are safeguarded inconvenient; 3 burners are still limited for work-ing life, are generally about 1 year.
Summary of the invention
The present invention adopts turbulent burner manufacturing process complexity in use in prior art to solve, and processing and manufacturing cost is high, and dismounting is safeguarded inconvenient, and the problem that work-ing life is short, and then provides a kind of pulverized coal gasification furnace burner.
The present invention is the technical scheme adopted that solves the problem:
It comprises at least one deck protection feed channel, vaporized chemical pipeline, pulverized coal channel, the first swirl vane, the second swirl vane and flange, vaporized chemical pipeline is set in the outside of at least one deck protection feed channel, pulverized coal channel is set in vaporized chemical pipeline external, flange sleeve is contained on the outer side wall of pulverized coal channel, between the outer side wall that first swirl vane is arranged at least one deck protection feed channel and vaporized chemical insides of pipes wall, between the outer side wall that second swirl vane is arranged on vaporized chemical pipeline and the inner side-wall of pulverized coal channel, and the first swirl vane and the second swirl vane are arranged near the bottom of vaporized chemical pipeline, the top of pulverized coal channel and the outer side wall sealing of vaporized chemical pipeline are arranged, and the top of pulverized coal channel is provided with breeze airflow import, the outer side wall sealing of the top of vaporized chemical pipeline and at least one deck protection feed channel is arranged, and be provided with vaporized chemical import near the top of vaporized chemical pipeline, at least the top of one deck protection feed channel is provided with the import of protection gas.
The invention has the beneficial effects as follows:
One, gasification reaction temperatures as high more than 1250 DEG C in airflow bed gasification furnace, high-temperature gasification brings the problem of the easier burning of gasifier nozzle.Adopt water-cooling jacket to protect burner in prior art, the portion temperature that burner contacts with water is low, but the exposed opposite side in flue gas of burner; because the flue-gas temperature be in contact with it is higher; and burner continues to pass into oxygen in stove, ambient oxygen content is high, easily high temperature oxidation occurs.Cooling water inflow regulates according to return water temperature, when waterworks, temperature measurement system go wrong, easily causes cooling water inflow not enough.Once cooling water inflow does not reach requirement, burner head will be overheated and cause scaling loss.Burner center of the present invention has two to protect gas passage, and nitrogen or carbonic acid gas spray into burner hearth by these two protection gas passages endlessly.Continue the nitrogen that sprays into or this burner is surrounded by carbonic acid gas, make it be in inert gas environment, avoid high temperature oxidation problem.The nitrogen sprayed in addition or carbon dioxide temperature lower, and be rare gas element, can effectively reduce temperature near this burner, avoid burner because of overheated and scaling loss.
Two, present invention decreases the contact area of burner and flue gas, be conducive to protecting burner.In prior art, the normal multi-level water cooling chuck that adopts protects burner; every grade of water-cooling jacket is by outer wall, water entry, intermediate course, water exit, outer wall composition; therefore water-cooling jacket is thicker; every grade of water-cooling jacket thickness is about 75mm, and the area of every grade of water-cooling jacket head and smoke contacts is the thick annulus area being about 75mm of ring.Burner conventional at present from inside to outside coaxial line is furnished with igniter fuel passage, first step water-cooling jacket, vaporized chemical passage, second stage water-cooling jacket, coal dust channel, third stage water-cooling jacket.The total area of this burner head visible and smoke contacts is 3 thick area sums being all about the annular of 75mm of ring.The area that burner head is exposed in flue gas is large, easily high temperature oxidation and scaling loss occurs.Only have one deck to be about the tube wall of 15mm in the present invention between each passage, burner head and the total area of smoke contacts are that 3 internal diameters are different, and the wall cross-section that wall thickness is all about the steel pipe of 15mm is amassed.When the vaporized chemical passage of the present invention and prior art, coal dust channel width and vaporized chemical channel internal diameter are identical, the burner head of prior art and the area of smoke contacts are more than 5 times of the present invention.Therefore, the area of burner head of the present invention and smoke contacts is little, is conducive to protecting burner.
Three, burner of the present invention can be avoided by high temperature reflux flue gas scaling loss.After the swirling eddy that turbulent burner is formed sprays into burner hearth, be subject to the effect of centrifugal force, rotational flow can be done near furnace wall district, cause vapourizing furnace center pressure lower, then high-temperature flue gas is entrainmented upwards is back near burner head to vapourizing furnace center, forms Central backflow area.High-temperature flue gas to upper flowing in Central backflow area further increases burner head temperature, makes the easier scaling loss of burner.In prior art, burner head water-cooling jacket channel cross-section is little and have elbow to exist, and cools insufficient, therefore the easy scaling loss of burner head.The nitrogen protecting gas passage to spray at a high speed in the present invention or carbonic acid gas to blow off in Central backflow area burner to the high-temperature flue gas of upper flowing, thus reduce temperature near burner, and protection burner is not by high temperature reflux flue gas scaling loss.In sum, energy available protecting burner of the present invention is not burnt, and extends burner work-ing life.
Four, the present invention is conducive to mixing of coal dust and vaporized chemical, is conducive to gasification.Adopt tertiary effluent cold chuck protection burner in prior art, have water-cooling jacket between coal dust channel and vaporized chemical passage, water-cooling jacket is made up of outer wall, water entry, intermediate course, water exit, outer wall, and therefore water-cooling jacket is thicker, and thickness is about 75mm.Coal dust ring cavity passage and vaporized chemical ring cavity path clearance little, be about 10mm.Distance between burner exit breeze airflow and vaporized chemical air-flow is 7.5 times of breeze airflow thickness, is unfavorable for that coal dust mixes with the rapid of vaporized chemical, is unfavorable for gasification reaction.In the present invention, gas shield passage is positioned at burner center; one deck is only had to be about the tube wall of 15mm between coal dust channel region and vaporized chemical passage area; distance between burner exit breeze airflow and vaporized chemical air-flow is 1/5th of prior art; be conducive to coal dust to mix with vaporized chemical, promote that gasification reaction carries out.
Five, the present invention protects gas not affect normally carrying out of gasification reaction.The nitrogen protecting gas passage to continue to pass in the present invention or carbonic acid gas.Nitrogen is rare gas element, does not participate in gasification reaction, and carbonic acid gas is one of gasification product.Both all do not affect normally carrying out of gasification reaction in stove.
Six, present invention saves device fabrication expense and running cost.First, present invention reduces burner manufacturing expense.In order to prevent gasifier nozzle Yin Gaowen from burning, in prior art, generally adopt water-cooling jacket to carry out cooling burner, its temperature is controlled in a rational scope.For prevent instantaneous cut off the water supply or switch water source time water jacket is burnt out, most water-cooling jacket adopts heat-resisting alloy steel to make.Simultaneously watercooling jacket internal-external temperature difference is large, and thermal stresses is comparatively large, and particularly the bight weld seam easily concentrated of thermal stresses, more easily reveals, and generally adopts the material making water jacket identical with burner, and notes the compensation problem of welding and heat treatment specification, thermal expansion difference.In order to ensure that burner obtains even, good cooling, avoid occurring cooling blind area, watercooling jacket pipeline structure design comparison is complicated, adopts slightly large flow area simultaneously, reduces elbow as far as possible, reduce resistance to flow.In a word, the burner manufacturing process with water-cooling jacket is very complicated, and processing request is very high, and raw materials is expensive, and the HAYNES188 alloy of such as high temperature resistant, resistance to erosion, this all causes burner manufacturing expense significantly to increase.Adopt protection gas shielded burner in the present invention, do not have water-cooling jacket, nozzle structure is simple, easily manufactured, saves the manufacturing expense of water-cooling jacket.Secondly, present invention saves the manufacturing expense of burner water circulation system and drive the running cost of circulation.The burner of prior art adopts water-cooling jacket protection; for avoiding corrosion of piping and fouling; water jacket adopts deaerated water cooling; so cooling water system must have water tank, service pump, water supply conduit, deoxygenator, water level control system, water return loop and monitoring instrument etc., whole system cost is higher.Meanwhile, the running cost (as water rate, the electricity charge, maintenance cost) of annual water-flow circuit is larger.Visible prior art manufacturing expense is expensive, and operation cost is high.Do not have water-cooling jacket in the present invention, naturally do not have water circulation system, the present invention saves manufacturing expense and the operation cost of water circulation system compared to existing technology.The present invention protects gas to adopt nitrogen or carbonic acid gas, the just byproduct in chemical plant, draws materials conveniently, cost-saving.
Accompanying drawing explanation
Fig. 1 is the overall schematic diagram of the present invention, and Fig. 2 is structural representation of the present invention.
Embodiment
Embodiment one: composition graphs 1-Fig. 2 illustrates present embodiment, a kind of pulverized coal gasification furnace burner, it comprises at least one deck protection feed channel 1, vaporized chemical pipeline 2, pulverized coal channel 3, first swirl vane 4, second swirl vane 5 and flange 6, vaporized chemical pipeline 2 is set in the outside of at least one deck protection feed channel 1, it is outside that pulverized coal channel 3 is set in vaporized chemical pipeline 2, flange 6 is sleeved on the outer side wall of pulverized coal channel 3, between the outer side wall that first swirl vane 4 is arranged at least one deck protection feed channel 1 and vaporized chemical pipeline 2 inner side-wall, second swirl vane 5 is arranged between the outer side wall of vaporized chemical pipeline 2 and the inner side-wall of pulverized coal channel 3, and the first swirl vane 4 and the second swirl vane 5 are arranged near the bottom of vaporized chemical pipeline 2, the top of pulverized coal channel 3 and the outer side wall sealing of vaporized chemical pipeline 2 are arranged, and the top of pulverized coal channel 3 is provided with breeze airflow import 3-1, the outer side wall sealing of the top of vaporized chemical pipeline 2 and at least one deck protection feed channel 1 is arranged, and be provided with vaporized chemical import 2-1 near the top of vaporized chemical pipeline 2, at least the top of one deck protection feed channel 1 is provided with the import of protection gas.
In present embodiment, at least one deck protection feed channel inside is protection gas passage area, at least forms vaporized chemical passage area between one deck protection feed channel 1 and vaporized chemical pipeline 2, forms coal dust channel region between vaporized chemical pipeline 2 and pulverized coal channel 3.
Embodiment two: composition graphs 2 illustrates present embodiment; a kind of pulverized coal gasification furnace burner of present embodiment; the protection feed channel of described at least one deck protection feed channel 1 is the first protection feed channel 1-1 of one deck, and other structure is identical with embodiment one.
Embodiment three: composition graphs 1 illustrates present embodiment, a kind of pulverized coal gasification furnace burner of present embodiment, the protection feed channel of described at least one deck protection feed channel 1 is the first two-layer protection feed channel 1-1 and second protection feed channel 1-2, second protection feed channel 1-2 is set on the first protection feed channel 1-1, the top and first of the second protection feed channel 1-2 is protected the outer side wall of feed channel 1-1 to seal and is arranged, the top of the first protection feed channel 1-1 is processed with the first protection gas import 1-3, second protection feed channel 1-2 is processed with the second protection gas import 1-4 near top sidewall, other structure is identical with embodiment one.
Embodiment four: composition graphs 1 illustrates present embodiment; a kind of pulverized coal gasification furnace burner of present embodiment; described first protection feed channel 1-1, the second protection feed channel 1-2, vaporized chemical pipeline 2 and pulverized coal channel 3 are circulating line; and the first protection feed channel 1-1, the second protection feed channel 1-2, vaporized chemical pipeline 2 and pulverized coal channel 3 are all coaxially arranged, other structure is identical with embodiment two or three.
Embodiment five: composition graphs 1 illustrates present embodiment; a kind of pulverized coal gasification furnace burner of present embodiment; described first protection feed channel 1-1 is the first protection feed channel be formed from steel; second protection feed channel 1-2 is the second protection feed channel be formed from steel; vaporized chemical pipeline 2 is the vaporized chemical pipelines be formed from steel; pulverized coal channel 3 is the pulverized coal channels be formed from steel, and other structure is identical with embodiment four.
Embodiment six: composition graphs 1 illustrates present embodiment; a kind of pulverized coal gasification furnace burner of present embodiment; the wall thickness of described first protection feed channel 1-1, the wall thickness of the second the protection wall thickness of feed channel 1-2, the wall thickness of vaporized chemical pipeline 2 and pulverized coal channel 3 are 15mm, and other structure is identical with embodiment five.
Principle of work
This burner is arranged on top of gasification furnace.Vaporized chemical pipeline is flowed into after oxygen and water vapor mixing, rotate after flowing through the first swirl vane 4 and spray into burner hearth, coal dust relies on high speed nitrogen (or carbonic acid gas) to be blown into pulverized coal channel 3, after flowing through the second swirl vane 5, same rotation sprays into burner hearth, oxygen, the generating gasification reaction both while the rotation of nearly furnace wall district flows downward of water vapour and coal dust.Generate a large amount of synthetic gas and slag in reaction process, release amount of heat simultaneously.Because air-flow flows near wall region, center pressure is lower, and high-temperature flue gas can upwards entrainment, and forms Central backflow area.Nitrogen or carbonic acid gas are ceaselessly blown in burner hearth through the first protection feed channel 1-1 and second protection feed channel 1-2; due to nitrogen or carbon dioxide flow rate higher and be rare gas element; the high-temperature flue gas entrainmenting back roof of the furnace to be blown off downwards top; reduce the temperature at this burner place of the present invention, protect this burner not to be burnt.
Claims (6)
1. a pulverized coal gasification furnace burner, is characterized in that: it comprises at least one deck protection feed channel (1), vaporized chemical pipeline (2), pulverized coal channel (3), the first swirl vane (4), the second swirl vane (5) and flange (6); vaporized chemical pipeline (2) is set in the outside of at least one deck protection feed channel (1), it is outside that pulverized coal channel (3) is set in vaporized chemical pipeline (2), flange (6) is sleeved on the outer side wall of pulverized coal channel (3), between the outer side wall that first swirl vane (4) is arranged at least one deck protection feed channel (1) and vaporized chemical pipeline (2) inner side-wall, second swirl vane (5) is arranged between the outer side wall of vaporized chemical pipeline (2) and the inner side-wall of pulverized coal channel (3), and the first swirl vane (4) and the second swirl vane (5) are arranged near the bottom of vaporized chemical pipeline (2), the top of pulverized coal channel (3) and the outer side wall sealing of vaporized chemical pipeline (2) are arranged, and the top of pulverized coal channel (3) is provided with breeze airflow import (3-1), the outer side wall sealing of the top of vaporized chemical pipeline (2) and at least one deck protection feed channel (1) is arranged, and be provided with vaporized chemical import (2-1) near the top of vaporized chemical pipeline (2), at least the top of one deck protection feed channel (1) is provided with the import of protection gas.
2. a kind of pulverized coal gasification furnace burner according to claim 1, is characterized in that: the protection feed channel of described at least one deck protection feed channel (1) is first protection feed channel (1-1) of one deck.
3. a kind of pulverized coal gasification furnace burner according to claim 1, it is characterized in that: the protection feed channel of described at least one deck protection feed channel (1) is the first two-layer protection feed channel (1-1) and the second protection feed channel (1-2), second protection feed channel (1-2) is set in the first protection feed channel (1-1), the top and first of the second protection feed channel (1-2) is protected the outer side wall of feed channel (1-1) to seal and is arranged, the top of the first protection feed channel (1-1) is processed with the first protection gas import (1-3), second protection feed channel (1-2) is processed with the second protection gas import (1-4) near top sidewall.
4. a kind of pulverized coal gasification furnace burner according to Claims 2 or 3; it is characterized in that: described first protection feed channel (1-1), the second protection feed channel (1-2), vaporized chemical pipeline (2) and pulverized coal channel (3) are circulating line, and the first protection feed channel (1-1), the second protection feed channel (1-2), vaporized chemical pipeline (2) and pulverized coal channel (3) are all coaxially arranged.
5. a kind of pulverized coal gasification furnace burner according to claim 4; it is characterized in that: described first protection feed channel (1-1) is the first protection feed channel be formed from steel; second protection feed channel (1-2) is the second protection feed channel be formed from steel; vaporized chemical pipeline (2) is the vaporized chemical pipeline be formed from steel, and pulverized coal channel (3) is the pulverized coal channel be formed from steel.
6. a kind of pulverized coal gasification furnace burner according to claim 5, is characterized in that: the wall thickness of described first protection feed channel (1-1), the wall thickness of the second protection feed channel (1-2), the wall thickness of vaporized chemical pipeline (2) and the wall thickness of pulverized coal channel (3) are 15mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510579027.5A CN105132037B (en) | 2015-09-11 | 2015-09-11 | A kind of pulverized coal gasification furnace burner |
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| CN201510579027.5A CN105132037B (en) | 2015-09-11 | 2015-09-11 | A kind of pulverized coal gasification furnace burner |
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| CN105132037A true CN105132037A (en) | 2015-12-09 |
| CN105132037B CN105132037B (en) | 2018-07-06 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106642115A (en) * | 2017-01-17 | 2017-05-10 | 哈尔滨工业大学 | Working method for comprehensive cooling type multiple little flame burners |
| CN107033972A (en) * | 2017-05-09 | 2017-08-11 | 哈尔滨工业大学 | A kind of dry coal powder airflow bed gasification furnace burner with purging gas shielded |
| CN107642779A (en) * | 2017-11-02 | 2018-01-30 | 大峘集团有限公司 | A kind of environment-protecting energy-saving type briquette fine coal air burner |
| CN110079362A (en) * | 2018-01-25 | 2019-08-02 | 宝塔国际石化工程技术有限公司 | A kind of coal gasification burner airflow uniform distribution device |
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| CN107033972A (en) * | 2017-05-09 | 2017-08-11 | 哈尔滨工业大学 | A kind of dry coal powder airflow bed gasification furnace burner with purging gas shielded |
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| CN110079362A (en) * | 2018-01-25 | 2019-08-02 | 宝塔国际石化工程技术有限公司 | A kind of coal gasification burner airflow uniform distribution device |
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| CN105132037B (en) | 2018-07-06 |
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