CN1912462A - Vortex burner of micro-oil cold furnace igniting and superlow load stable burning and with low NOx drainage - Google Patents
Vortex burner of micro-oil cold furnace igniting and superlow load stable burning and with low NOx drainage Download PDFInfo
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- CN1912462A CN1912462A CN 200610053092 CN200610053092A CN1912462A CN 1912462 A CN1912462 A CN 1912462A CN 200610053092 CN200610053092 CN 200610053092 CN 200610053092 A CN200610053092 A CN 200610053092A CN 1912462 A CN1912462 A CN 1912462A
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Abstract
A swirl burner with low NOx discharge is prepared as inserting long oil gun of high energy micro oil to coal powder burner through burner elbow; setting secondary wind channel, high speed sealed wind channel, coal powder combustion chamber with the first a second stages being connected to each other in coal powder burner body; connecting one end of high intensity oil combustion chamber to the first stage of coal powder combustion chamber and another end to outlet of said long oil gun, setting internal and external secondary wind swirlers in secondary wind channel.
Description
Technical field
The present invention relates to turbulent burner, relate in particular to the turbulent burner that a kind of little oil cooling furnace igniting and ultra-low load steady fire and have low NOx drainage.
Background technology
China's imported crude oil was about 1.2 hundred million tons in 2004, estimated will break through 1.4 hundred million tons in 2005, and the interdependency of imported crude oil has been reached 40%.Oil has now become the strategic materials that concern China's economic security.
The Premier Wen Jiabao emphasizes when making Government Report in ten National People's Congress's meetings on March 5th, 05, pay attention to energy resources saving and utilization rationally.Premier Wen says, " alleviate the contradiction of China's energy resources and socio-economic development, must base on our country, significantly improve the energy resources utilization ratio ".
Large-sized station boiler igniting and low-load combustion-stabilizing are huge with oil mass, the about 50-70 ton of 200MW boiler black furnace kindling one a less important consumption oil, and a 300MW boiler need consume 80-100 ton oil approximately, and a 600MW boiler need consume 200-250 ton oil approximately.Have statistics to show, annual boiler kindling igniting needs ten thousand tons of fuel oils of 150-180 approximately, amounts to RMB 45-54 hundred million yuan.Help aspect the fuel oil at underload, along with net capacity strengthens, the aggravation of electrical network peak-valley difference, at night the low power consumption period, many units are moving under underload and ultra-low load state, though development along with combustion technology, many units can not thrown the steady combustion of oil through after the burner reconstruction when 50-60% loads, but when ultra-low load (30-50%) moves, must come into operation and help fuel oil, combustion-supporting huge with oil mass.Based on this, National Development and Reform Committee encourages exploitation and promotes non-oil ignition technology and little oily pulverized coal ignition technology.
The domestic plasma non-oil ignition technology of having succeeded in developing, this technology is applied on large-sized station boiler.This technology can realize non-oil ignition, but also has problems such as system complex, cost height.
Few-oil ignition technology (in a wind, adding small oil gun), because its oil-saving effect better (look boiler capacity, the small oil gun amount of fuel is 200-500kg/h), equipment investment is few, the reliability height has obtained using very widely on boiler.But there is following deficiency in this technology: the igniting of (1) small oil gun can't be used when the boiler black furnace starts.(2) the small oil gun igniting still can't solve when boiler startup, and electrostatic precipitator problems comes into operation.When (3) boiler moves under the ultra-low load situation, the steady combustion scarce capacity of small oil gun.
Tianyuan Science-Technology Co., Ltd., Zhejiang Univ. Hangzhou obtains " cold state ignition under tiny oil and steady burning burner in ultra low load ", " little oil cooling attitude is lighted meager coal and steady burning burner in ultra low load " 2 utility model patents.Its patent of invention is just in checking process.Acquired 2 patents mainly are to be used for the corner tangential firing straight-through pulverized coal burner.Through the technical staff's of company effort, now succeeded in developing the tiny-oil ignition technology that is used for turbulent burner.
Summary of the invention
The purpose of this invention is to provide the turbulent burner that a kind of little oil cooling furnace igniting and ultra-low load steady fire and have low NOx drainage.
It has the burner elbow that connects successively, pulverized coal concentrator, the coal burner body, the little oily long oil rifle of high energy is inserted into the coal burner body from the burner elbow, has secondary air channel in the coal burner body, seal the wind passage at a high speed, pulverized coal combustor, pulverized coal combustor has the one-level pulverized coal combustor that is connected, the secondary pulverized coal combustor, one-level pulverized coal combustor and high strength oil combustion chamber one end join, secondary wind cyclone in being provided with is joined in the little oily long oil rifle outlet of the high strength oil combustion chamber other end and high energy on secondary air channel, outer secondary wind cyclone.
Beneficial effect of the present invention:
1) for the large-scale power station coal-powder boiler, turbulent burner and DC burner in burner structure form, arrangement, surely fire aspect such as mechanism and exist very big differently, this tiny-oil ignition technology is used for turbulent burner;
2), adopted little oily long oil rifle of high energy and high strength oil combustion chamber structure to realize the energy level amplification principle in order to realize the tiny-oil ignition of turbulent burner.Little oily long oil rifle and high strength oil combustion chamber insert from burner rear portion elbow, with the structure of DC burner a great difference are arranged;
3) at the outer setting sealing wind passage of secondary coal combustion chamber, the mixing that slows down secondary wind and a wind is burnt fugitive constituent under anaerobic condition, reduce the NOx discharging.
4) the igniting rate of economizing gasoline can reach more than 95%.Have underload and ultra-low load steady combustion function.The electric precipitation that after ignition of the boiler, promptly can come into operation, environment protecting is good;
5) has the cyclone micro-oil start-up burner reliability height of low NOx drainage.The tiny-oil ignition cost of investment is low, has the market competitiveness, accepts for market easily.
Description of drawings
Accompanying drawing is the turbulent burner structural representation that little oil cooling furnace igniting and ultra-low load steady fire and have low NOx drainage.
The specific embodiment
As shown in the figure, little oil cooling furnace igniting and ultra-low load steady fire and have the turbulent burner of low NOx drainage, has the burner elbow that connects successively, pulverized coal concentrator 3, the coal burner body, the little oily long oil rifle 1 of high energy is inserted into the coal burner body from the burner elbow, has secondary air channel in the coal burner body, seal wind passage 6 at a high speed, pulverized coal combustor, pulverized coal combustor has the one-level pulverized coal combustor 4 that is connected, secondary pulverized coal combustor 5, one-level pulverized coal combustor 4 joins with high strength oil combustion chamber 2 one ends, secondary wind cyclone 7 in being provided with is joined in little oily long oil rifle 1 outlet of high strength oil combustion chamber 2 other ends and high energy on secondary air channel, outer secondary wind cyclone 8.
The length of the little oily long oil rifle 1 of described high energy is 2m-3m.The air mass flow of outer secondary wind cyclone 8 be interior secondary wind cyclone 7 air mass flow 1.5-2 doubly.
The present invention is the turbulent burner with function of tiny-oil ignition and low NOx drainage, and it utilizes micro-fuel oil (20-50kg/h) direct firing coal-dust under the black furnace state, has ultra-low load steady combustion ability, and has the low NOx drainage characteristic.Because the version and the DC burner of turbulent burner have a great difference, therefore, must adopt little oily long oil rifle of high energy and high strength oil combustion chamber for turbulent burner, and long oil rifle and high-intensity combustion chamber must be inserted from the rear portion elbow.The little oily long oil rifle of high energy burns fuel oil under vaporized state, oil gun and high strength oil combustion chamber cooperate, and makes gasified fuel completing combustion in the extremely short time, produces the very oily flame of high-temperature.The one-level coal dust firing that high temperature oil flame sprays at a high speed after concentrating is indoor, the breeze airflow of high concentration is by high temperature oil flame instantaneous ignition, mix with the dilute phase breeze airflow and light the dilute phase coal dust in that the secondary coal dust firing is indoor by ablaze dense phase pulverized coal then, thereby realized the fractional combustion of coal dust, burning capacity is amplified step by step, reaching a little fights quickens the purpose of coal dust firing, significantly reduces the required fire ignition energy of coal dust firing.
For turbulent burner, the thermal-flame that little oil produced is to spray into along axis, and therefore, the mode that should the employing center concentrates increases the coal powder density of first-stage burning chamber.The startup stage that feeder and coal pulverizer begin, coal powder density is relatively low, adopts the Pulverized Coal Concentration method, can guarantee one-level chamber high temperature oil flame quick igniting coal dust.
Have one deck to seal wind at a high speed between tiny-oil ignition pulverized coal combustor (one-level chamber and secondary chamber) and secondary wind, sealing wind can weaken the mixing at wind of fugitive constituent combustion phases and secondary wind, thereby reduces the discharging of NOx significantly.This layer sealing wind also has the effect of cooling two stage burner wall in addition, prevents that burner from burning out and slagging scorification.
Secondary wind cyclone and outer secondary wind cyclone in this burner is provided with.The air mass flow of outer secondary wind cyclone is 1.5-2 a times of interior secondary wind.And the swirl strength of interior secondary wind cyclone and outer secondary wind cyclone can be regulated.The effect of inside and outside secondary wind cyclone is the size of regulating the recirculating zone.Because the air quantity by outer secondary wind cyclone is big, can slow down mixing of secondary wind and a wind, help reducing NOx and discharge.
When this little oil tech was used for the transformation of existing burner, secondary chamber's wind duct dimension and cyclone swirl strength all remained unchanged, and when normal operation, can guarantee that the combustion characteristics of turbulent burner, Slagging Characteristics are constant, and have lower NOx discharging.By the coal dust amount of reasonable disposition one-level combustion chamber, secondary combustion chamber, and adopt heat-resisting alloy steel, guarantee that the burner wall surface temperature is no more than 600 °, does not burn out and slagging scorification.This turbulent burner can reach the replace oil with coal effect more than 95%.Have that speed of ignition is fast, reliability is high, not slagging scorification, the igniting characteristics such as big of exerting oneself.
The present invention has been owing to adopted the little oily long oil rifle of high energy, and the high strength oil combustion chamber has the center concentrating function Pulverized coal concentrator, the brand-new technology such as high-speed sealing wind, and adopt step by step amplification principle of energy, so that little oil Firing technique goes for turbulent burner. This invention has fuel-saving efficiency height (more than 95%), igniting Speed is fast, Anti-slagging, can be in the boiler cold-state situation direct firing coal-dust, have ultra-low load steady combustion ability, The reliability high. Scrap build is simple, and cost is low, need not operation maintenance, can save a large amount of for power plant Boiler startup and help the advantage of fuel oil, have wide market prospects.
Claims (3)
1. little oil cooling furnace igniting and ultra-low load steady combustion and have the turbulent burner of low NOx drainage, it is characterized in that, it has the burner elbow that connects successively, pulverized coal concentrator (3), the coal burner body, the little oily long oil rifle of high energy (1) is inserted into the coal burner body from the burner elbow, has secondary air channel in the coal burner body, seal wind passage (6) at a high speed, pulverized coal combustor, pulverized coal combustor has the one-level pulverized coal combustor (4) that is connected, secondary pulverized coal combustor (5), one-level pulverized coal combustor (4) joins with high strength oil combustion chamber (2) one ends, secondary wind cyclone (7) in being provided with is joined in the little oily long oil rifle of high strength oil combustion chamber (2) other end and high energy (1) outlet on secondary air channel, outer secondary wind cyclone (8).
2. a kind of little oil cooling furnace igniting according to claim 1 and ultra-low load steady fire and have the turbulent burner of low NOx drainage, and it is characterized in that: the length of the little oily long oil rifle of described high energy (1) is 2m-3m.
3. a kind of little oil cooling furnace igniting according to claim 1 and ultra-low load steady combustion and have the turbulent burner of low NOx drainage is characterized in that: the air mass flow of described outer secondary wind cyclone (8) is 1.5-2 times of air mass flow of interior secondary wind cyclone (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610053092 CN1912462A (en) | 2006-08-23 | 2006-08-23 | Vortex burner of micro-oil cold furnace igniting and superlow load stable burning and with low NOx drainage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610053092 CN1912462A (en) | 2006-08-23 | 2006-08-23 | Vortex burner of micro-oil cold furnace igniting and superlow load stable burning and with low NOx drainage |
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| CN1912462A true CN1912462A (en) | 2007-02-14 |
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| CN 200610053092 Pending CN1912462A (en) | 2006-08-23 | 2006-08-23 | Vortex burner of micro-oil cold furnace igniting and superlow load stable burning and with low NOx drainage |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100585276C (en) * | 2008-06-20 | 2010-01-27 | 哈尔滨工业大学 | Side direction multilevel open type igniting center powder feeding vortex combustor of small oil mass gasification combustion |
| CN101749700A (en) * | 2010-03-04 | 2010-06-23 | 郑平安 | Pulverized coal furnace tiny-oil ignition combustion method |
| CN101561150B (en) * | 2009-06-02 | 2010-08-25 | 向卫 | Oxygen-enriched tiny-oil ignition combustion-stabilizing device |
| CN101403497B (en) * | 2008-11-12 | 2010-10-06 | 哈尔滨工业大学 | Micro-oil ignition rotational flow breeze combustion device for preventing slag bonding of primary combustion chamber |
| CN101949542A (en) * | 2010-04-14 | 2011-01-19 | 华中科技大学 | Three-layered secondary air low nitrogen oxide swirl burner |
| CN102338376A (en) * | 2010-07-23 | 2012-02-01 | 烟台龙源电力技术股份有限公司 | Pulverized coal burner |
| CN101349435B (en) * | 2007-07-19 | 2012-06-27 | 烟台龙源电力技术股份有限公司 | Plasma ignition combustor |
| CN102679334A (en) * | 2012-06-07 | 2012-09-19 | 上海锅炉厂有限公司 | Plasma ignition pulverized coal combustion system |
| CN102788347A (en) * | 2012-06-07 | 2012-11-21 | 上海锅炉厂有限公司 | Tiny-oil ignition pulverized coal combustion system |
| CN107575859A (en) * | 2017-09-27 | 2018-01-12 | 西安热工研究院有限公司 | The oxygenation start-up burner and its ignition smooth combustion method of a kind of coal burning boiler of power station |
| CN108413436A (en) * | 2018-03-30 | 2018-08-17 | 烟台龙源电力技术股份有限公司 | Pre-chamber arrangement and combustion system |
| CN111594871A (en) * | 2020-06-15 | 2020-08-28 | 西安西热锅炉环保工程有限公司 | Oxygen-enriched tiny-oil ignition device and method based on double-air-regulation cyclone burner |
| CN111947137A (en) * | 2020-08-27 | 2020-11-17 | 哈尔滨工业大学 | Oil secondary air assisted ignition self-stable combustion W flame boiler and self-stable combustion method |
-
2006
- 2006-08-23 CN CN 200610053092 patent/CN1912462A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101349435B (en) * | 2007-07-19 | 2012-06-27 | 烟台龙源电力技术股份有限公司 | Plasma ignition combustor |
| CN100585276C (en) * | 2008-06-20 | 2010-01-27 | 哈尔滨工业大学 | Side direction multilevel open type igniting center powder feeding vortex combustor of small oil mass gasification combustion |
| CN101403497B (en) * | 2008-11-12 | 2010-10-06 | 哈尔滨工业大学 | Micro-oil ignition rotational flow breeze combustion device for preventing slag bonding of primary combustion chamber |
| CN101561150B (en) * | 2009-06-02 | 2010-08-25 | 向卫 | Oxygen-enriched tiny-oil ignition combustion-stabilizing device |
| CN101749700A (en) * | 2010-03-04 | 2010-06-23 | 郑平安 | Pulverized coal furnace tiny-oil ignition combustion method |
| CN101949542A (en) * | 2010-04-14 | 2011-01-19 | 华中科技大学 | Three-layered secondary air low nitrogen oxide swirl burner |
| CN102338376A (en) * | 2010-07-23 | 2012-02-01 | 烟台龙源电力技术股份有限公司 | Pulverized coal burner |
| CN102338376B (en) * | 2010-07-23 | 2015-07-29 | 烟台龙源电力技术股份有限公司 | A kind of coal burner |
| CN102679334A (en) * | 2012-06-07 | 2012-09-19 | 上海锅炉厂有限公司 | Plasma ignition pulverized coal combustion system |
| CN102788347A (en) * | 2012-06-07 | 2012-11-21 | 上海锅炉厂有限公司 | Tiny-oil ignition pulverized coal combustion system |
| CN102679334B (en) * | 2012-06-07 | 2014-09-03 | 上海锅炉厂有限公司 | Plasma ignition pulverized coal combustion system |
| CN107575859A (en) * | 2017-09-27 | 2018-01-12 | 西安热工研究院有限公司 | The oxygenation start-up burner and its ignition smooth combustion method of a kind of coal burning boiler of power station |
| CN108413436A (en) * | 2018-03-30 | 2018-08-17 | 烟台龙源电力技术股份有限公司 | Pre-chamber arrangement and combustion system |
| CN111594871A (en) * | 2020-06-15 | 2020-08-28 | 西安西热锅炉环保工程有限公司 | Oxygen-enriched tiny-oil ignition device and method based on double-air-regulation cyclone burner |
| CN111947137A (en) * | 2020-08-27 | 2020-11-17 | 哈尔滨工业大学 | Oil secondary air assisted ignition self-stable combustion W flame boiler and self-stable combustion method |
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