CN1793737A - Direct flow oil-saving burner faulty coal for combustion - Google Patents
Direct flow oil-saving burner faulty coal for combustion Download PDFInfo
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- CN1793737A CN1793737A CN 200610048926 CN200610048926A CN1793737A CN 1793737 A CN1793737 A CN 1793737A CN 200610048926 CN200610048926 CN 200610048926 CN 200610048926 A CN200610048926 A CN 200610048926A CN 1793737 A CN1793737 A CN 1793737A
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Abstract
The invention discloses a bad fuel coal oil-saving direct current burner, comprising coal powder combustion chamber, where the front end of the coal powder combustion chamber is provided with an impact coal powder concentrator, a primary combustion chamber is arranged in the coal powder combustion chamber, plural oil combustion chambers are arranged outside the middle of the primary combustion chamber, a small-oil quantity oil combustor is arranged in the oil combustion chamber, the tail of the primary combustion chamber is connected with the secondary combustion chamber, and heat storage fireproof heat-insulating material is laid in a heat storage coal powder stable combustion chamber. The advantages are using less oil to ignite large amount of coal powder, and oil-saving above 95%; stable combustion function; good environmental protection; high efficiency.
Description
Technical field
The present invention relates to burner, relate in particular to a kind of burning inferior coal (comprising soft coal, meager coal and anthracite) direct current oil-saving burner.
Background technology
Ignition of the boiler of large-scale power station burning inferior coal and ultra-low load stable combustion oil amount are huge, a general once about oil consumption 150-200 ton of 200MW boiler black furnace kindling, the about oil consumption 200-300 ton of 300MW boiler, particularly newly-built unit, general 300MW newly constructed boiler, the debug phase needs oil consumption 1500-2500 ton.According to statistics, annual station boiler oil consumption needs ten thousand tons of fuel oils of 180-200 approximately, amounts to hundred million yuan of the about 80-100 of RMB.
Oil is the rare strategic resource of China, the Department of Resources Conservation and Comprehensive Utilization of State Economic and Trade Commission writes in " saving and the 10th Five-Year Plan of alternative fuel oil ": saving and alternative fuel oil are to solve the China's oil shortage of resources, alleviate contradiction between oil supply and demand, ensure the great strategic measure of economic security of the country.During "the 10th five-years", 7,550,000 tons of the targets of power industry saving and alternative fuel oil, non-oil ignition technology and few oily pulverized coal ignition technology promptly are that economic and commercial committee encourages one of project of developing and promoting.
Domesticly succeeded in developing plasma non-oil ignition technology and few-oil ignition technology, but these technology use object only to be high-volatile bituminous coal, all can not be suitable for soft coal, meager coal and anthracite.And, plasma non-oil ignition technological system more complicated, the investment cost height, reliability is not high; Few-oil ignition combustion device black furnace point heater stage coal dust burnout rate low (about 50%), the fly ash combustible material height, boiler efficiency is low, be easy to generate second-time burning, bigger to influences such as follow-up equipment such as economizer and dedusters, and because this burner does not have steady combustion function, load generally is lower than 60% just must throw the steady combustion of oil, consumes a large amount of fuel oils that helps equally.
Summary of the invention
The purpose of this invention is to provide a kind of burning inferior coal fuel-economizing DC burner.
It has pulverized coal combustor, coal dust precombustion chamber Inner Front End is provided with the impacting type pulverized coal concentrator, be provided with the one-level combustion chamber in the coal dust precombustion chamber, the outside, middle part, one-level combustion chamber is provided with a plurality of oil combustion chambers, be provided with little oil mass oil burner in the oil combustion chamber, the one-level combustor tail is connected with secondary combustion chamber, be provided with folding flame ring in the secondary combustion chamber, coal dust precombustion chamber afterbody is connected with heat accumulating type coal-powder steady flame chamber through annular air register, the indoor accumulation of heat flame-proof thermal insulation material that lays of heat accumulating type coal-powder steady flame is formed by α pyramid tube and straight tube in heat accumulating type coal-powder steady flame chamber.
Beneficial effect of the present invention:
(1) with a spot of oil (60-80kg/h), light a large amount of coal dust (4-10t/h), realize the purpose of burning inferior coal (soft coal, meager coal and anthracite) boiler black furnace kindling, rate of economizing gasoline can reach more than 95%;
(2) have underload (40%) and do not throw the steady combustion function of oil;
(3) have ultra-low load (10-30%) and surely fire function;
(4) electric precipitation that after ignition of the boiler, promptly can come into operation, environment protecting is good;
(5) igniting back boiler coal-ash burnout rate height (more than 85%), fly ash combustible material is low, and the boiler efficiency height does not have influence to cleaner;
(6) system reform is simple, and cost of investment is low, and market prospects are wide.
Description of drawings
Accompanying drawing is a burning inferior coal oil-saving burner structural representation.Among the figure, coal dust precombustion chamber 1, impacting type pulverized coal concentrator 2, one-level pulverized coal combustor 3, oil combustion chamber 4, little oil mass oil burner 5, secondary pulverized coal combustor 6, folding flame ring 7, annular air register 8, coal-powder steady flame chamber 9.
The specific embodiment
As shown in drawings, direct flow oil-saving burner faulty coal for combustion has pulverized coal combustor 1,1 front end is provided with impacting type pulverized coal concentrator 2 in the coal dust precombustion chamber, be provided with one-level combustion chamber 3 in the coal dust precombustion chamber 1, the outside, 3 middle parts, one-level combustion chamber is provided with a plurality of oil combustion chambers 4, be provided with little oil mass oil burner 5 in the oil combustion chamber 4, one-level combustion chamber 3 afterbodys are connected with secondary combustion chamber 6, be provided with folding flame ring 7 in the secondary combustion chamber 6, coal dust precombustion chamber 1 afterbody is connected with heat accumulating type coal-powder steady flame chamber 9 through annular air register 8, heat accumulating type coal-powder steady flame chamber 9 is made up of α pyramid tube and straight tube, lays the accumulation of heat flame-proof thermal insulation material in the heat accumulating type coal-powder steady flame chamber 9.
The outside, 3 middle parts, described one-level combustion chamber is provided with 2-4 oil combustion chamber 4.α pyramid collet chuck angle in the accumulation of heat coal-powder steady flame chamber 9 is the 30-150 degree.Annular air register 8 thickness are 5mm-50mm.
The a spot of oil of the present invention is lighted the coal dust through concentrating in the one-level combustion chamber earlier, utilizes the heat of coal dust firing in the one-level combustion chamber to light the coal dust of secondary combustion chamber, and the heat that secondary pulverized coal combustor coal dust firing produces continues to light remaining coal dust.By fractional combustion, can realize a large amount of coal dust of a spot of oil drop combustion.Heat accumulating type coal-powder steady flame chamber can keep higher temperature by the flame-proof thermal insulation material moulding by casting after the material heating; According to stream condition, α pyramid tube can form a bigger smoke backflow district, and the flue gas of coal dust firing is entrainmented gets back to stable burning room, to unburned coal dust heating, the smooth combustion that keeps whole burner outlet coal dust.
When boiler normally moved, this burner was not thrown oil, did conventional main burner usefulness, can keep underload not throw the steady combustion of oil; When boiler black furnace kindling and ultra-low load steady combustion, a spot of oil (60-80kg/h) that comes into operation can keep coal dust smooth combustion, and rate of economizing gasoline can reach more than 95%, can directly light soft coal, meager coal and anthracite under the cold conditions situation.
The present invention at first puts oil burner 5 when starting ignition, oil is fully burning in combustion chamber 4, producing thermal-flame thus enters in the one-level pulverized coal combustor 3, fire burns through the high concentration pulverized coal that impacting type pulverized coal concentrator 2 concentrates, burned flame enters the secondary pulverized coal combustor, light the indoor coal dust of secondary coal dust firing, last flame and breeze airflow enter stable burning room's smooth combustion by the cross section sudden expansion.Partly the breeze airflow of lighting sprays in the stove and burns away, and provides the boiler kindling needed heat.
In a word, this invention have fuel-saving efficiency height (more than 95%), can be in the boiler cold-state situation direct point Fire colm (comprising soft coal, meager coal and anthracite), have oily low-load combustion-stabilizing ability, the system of not throwing Simple and reliable property high. Compare with similar the production of saving petrol have applied widely, oil-saving effect good, establish The advantage that standby transformation is simple, cost is low, maintenance workload is little, can save for power plant a large amount of pot furnace oils, The more important thing is the present burning inferior coal large-scale power station fire coal of (comprising soft coal, meager coal and anthracite) Unit quantity is huge, and is huge with oil mass, so this technology has the wide market space.
Claims (4)
1. direct flow oil-saving burner faulty coal for combustion, it is characterized in that, it has pulverized coal combustor (1), coal dust firing indoor (1) front end is provided with impacting type pulverized coal concentrator (2), be provided with one-level combustion chamber (3) in the pulverized coal combustor (1), the outside, middle part, one-level combustion chamber (3) is provided with a plurality of oil combustion chambers (4), be provided with little oil mass oil burner (5) in the oil combustion chamber (4), one-level combustion chamber (3) afterbody is connected with secondary combustion chamber (6), be provided with folding flame ring (7) in the secondary combustion chamber (6), pulverized coal combustor (1) afterbody is connected with heat accumulating type coal-powder steady flame chamber (9) through annular air register (8), heat accumulating type coal-powder steady flame chamber (9) is made up of α pyramid tube and straight tube, lays the accumulation of heat flame-proof thermal insulation material in the heat accumulating type coal-powder steady flame chamber (9).
2. a kind of direct flow oil-saving burner faulty coal for combustion according to claim 1 is characterized in that, the outside, middle part, described one-level combustion chamber (3) is provided with 2-4 oil combustion chamber (4).
3. a kind of direct flow oil-saving burner faulty coal for combustion according to claim 1 is characterized in that, the α pyramid collet chuck angle in the described accumulation of heat coal-powder steady flame chamber (9) is the 30-150 degree.
4. a kind of direct flow oil-saving burner faulty coal for combustion according to claim 1 is characterized in that, described annular air register (8) thickness is 5mm-50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610048926 CN1793737A (en) | 2006-01-05 | 2006-01-05 | Direct flow oil-saving burner faulty coal for combustion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610048926 CN1793737A (en) | 2006-01-05 | 2006-01-05 | Direct flow oil-saving burner faulty coal for combustion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1793737A true CN1793737A (en) | 2006-06-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 200610048926 Pending CN1793737A (en) | 2006-01-05 | 2006-01-05 | Direct flow oil-saving burner faulty coal for combustion |
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| CN (1) | CN1793737A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100523607C (en) * | 2007-09-25 | 2009-08-05 | 深圳东方锅炉控制有限公司 | Direct current coal powder burner |
| CN101191614B (en) * | 2006-12-01 | 2010-10-06 | 郑平安 | General purpose coal dust micro-oil igniting method |
| CN102322634A (en) * | 2011-09-26 | 2012-01-18 | 浙江工商大学 | Pulverized coal combustor capable of being ignited with little gasified oil |
| CN102032566B (en) * | 2009-09-27 | 2013-06-12 | 烟台龙源电力技术股份有限公司 | Pulverized coal burner and boiler with same |
| CN105782965A (en) * | 2016-03-04 | 2016-07-20 | 烟台龙源电力技术股份有限公司 | Heat accumulating type combustor |
-
2006
- 2006-01-05 CN CN 200610048926 patent/CN1793737A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101191614B (en) * | 2006-12-01 | 2010-10-06 | 郑平安 | General purpose coal dust micro-oil igniting method |
| CN100523607C (en) * | 2007-09-25 | 2009-08-05 | 深圳东方锅炉控制有限公司 | Direct current coal powder burner |
| CN102032566B (en) * | 2009-09-27 | 2013-06-12 | 烟台龙源电力技术股份有限公司 | Pulverized coal burner and boiler with same |
| CN102322634A (en) * | 2011-09-26 | 2012-01-18 | 浙江工商大学 | Pulverized coal combustor capable of being ignited with little gasified oil |
| CN105782965A (en) * | 2016-03-04 | 2016-07-20 | 烟台龙源电力技术股份有限公司 | Heat accumulating type combustor |
| CN105782965B (en) * | 2016-03-04 | 2018-09-21 | 烟台龙源电力技术股份有限公司 | A kind of heat-storage type burner |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |