CN101881443A - Fuel-free gas igniting and combustion stabilizing method for industrial coal powder boiler - Google Patents
Fuel-free gas igniting and combustion stabilizing method for industrial coal powder boiler Download PDFInfo
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- CN101881443A CN101881443A CN 201010235517 CN201010235517A CN101881443A CN 101881443 A CN101881443 A CN 101881443A CN 201010235517 CN201010235517 CN 201010235517 CN 201010235517 A CN201010235517 A CN 201010235517A CN 101881443 A CN101881443 A CN 101881443A
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Abstract
The invention relates to a fuel-free gas igniting and combustion stabilizing method for an industrial coal powder boiler, solving the problem that cold air powder feed and cold air or low temperature air for combustion affect the adaptability of the coal type in the existing industrial coal powder boilers. The method is characterized in that the mixture of primary air and the coal powder is jetted from a primary air pipe with a central pipe arranged on the axis to form coal powder airflow distributed on the internal and external layers; the air containing ozone or the oxygen containing ozone is jetted from the central pipe, and then a gas ignition gun is adopted to ignite the gas and further ignite the coal powder airflow on the internal layer under the support of the air containing ozone or the oxygen containing ozone, thus igniting the coal powder airflow on the external layer; the ozone accounts for 8.2-9.8% of the air or the oxygen in the central pipe by volume, and the oxygen in the central pipe (1) accounts for 5.5-7.5% of the oxygen in the primary air pipe (2) by volume. The method realizes that ignition in the industrial coal powder boiler does not need fuel at all, saves cost, ensures wide adaptability of the coal type and is conductive to market promotion of the industrial coal powder boiler.
Description
Technical field
The present invention relates to industrial coal powder boiler igniting and smooth burning method and device, be specially a kind of pulverized coal industrial boiler oil-free coal gas ignition and smooth burning method and device.
Background technology
It is the country of main energy sources with coal that China is one, and the boiler combustion coal dust is one of principal mode of coal in China utilization, relates to industry-by-industry.The igniting of present big-and-middle-sized pulverized-coal fired boiler, the steady combustion fuel modes that adopt more, will consume a large amount of fuel oils every year, causes the pressure of huge operating cost aspect for the boiler user; And along with the minimizing of petroleum resources, user extensively and the rise and the fluctuation of international oil price, seek and research and development substitute the pulverized coal combustion of fuel ignition and steady combustion, be the problem that the pulverized-coal fired boiler industry needs to be resolved hurrily.In recent years, industrialization has been succeeded in developing and realized to domestic industrial coal powder boiler, because of its thermal efficiency height, the saving energy and good environment protecting, become one of preferred option of middle-size and small-size traditional industry boiler improvement and district heating.Be simplification system, reduction cost, it mainly is the pattern of taking cold wind powder feeding, cold wind or Cryogenic air combustion-supporting, but because the restriction of less relatively combustion space has influenced the adaptive capacity of industrial coal powder boiler coal, thereby has restricted the marketing of industrial coal powder boiler.
Summary of the invention
The present invention adopts cold wind powder feeding, cold wind or the combustion-supporting existence of Cryogenic air to influence the problem of coal adaptive capacity in order to solve existing industrial coal powder boiler, and the strong pulverized coal industrial boiler oil-free coal gas ignition of a kind of coal adaptive capacity and smooth burning method and device are provided.
The present invention adopts following technical scheme to realize: pulverized coal industrial boiler oil-free coal gas ignition and smooth burning method, after the mixture of wind and coal dust is provided with an airduct ejection of central tube through the axis place, the breeze airflow that to form two strands be center, about layer distribution with airduct axis; Ejection ozone-containing air or oxygen in the central tube adopts coal gas ignition rifle point coal gas then and then lights the breeze airflow of nexine ozone-containing air or oxygen combustion-supporting time, and the breeze airflow of nexine is lighted outer field coal dust gas then.Ozone is the strong oxidizer that kind of safety is easy to get, and has the characteristic that reduces coal dust firing activation energy, reduces the coal dust burning-point; Employing contains the air or oxygen of ozone by the central tube firing coal-dust, can obviously reduce the igniting heat that pulverized coal ignition needs, make under the condition of using low ignition intensity sparking mode, can realize the quick igniting and the smooth combustion of coal dust, it is combustion-supporting to replace fuel ignition; When underload and ature of coal are relatively poor, can play the effect of stablizing pulverized coal flame, ensure the safe and stable operation of steam generator system; Interior air or oxygen and the nexine breeze airflow mixing ignition of central tube that contains ozone simultaneously, this part breeze gas flow temperature improves fast and then lights with outer breeze airflow, flow to into burner hearth through the high-temperature flue gas after more fully lighting and fully to burn, improve the coal adaptive capacity of industrial coal powder boiler, further improve the coal dust firing effect.
The shared volume content of ozone is 8.2%-9.8% in the interior air or oxygen of central tube, and the volume of oxygen is the 5.5%-7.5% of oxygen volume in the airduct (2) in the central tube (1).
Lighting before the coal gas ignition rifle primary air flow in the airduct is fully loaded 70%-80%, guarantees the fast and stable igniting of coal gas.
The central tube that is positioned at burner the place ahead is provided with the ozone generator that is communicated with it, ozone generator is provided with the source of the gas pipe that is communicated with it, the central tube overcoat once rear end of airduct and an airduct is provided with the shell-like secondary precombustion chamber that is communicated with it, be with in the secondary precombustion chamber and its fixing shell-like one-level precombustion chamber, be fixed with the bluff body that is positioned at rear, central tube rear end face center in the one-level precombustion chamber, the secondary precombustion chamber is with secondary air chamber outward, and the secondary precombustion chamber is positioned at the shell-like rear portion of secondary air chamber, be provided with first swirl vane between secondary precombustion chamber and the secondary air chamber rear portion, secondary air chamber is with tertiary chamber outside the rear portion, and the secondary air chamber rear portion is positioned at the shell-like rear portion of tertiary chamber, the tertiary chamber rear end is communicated with burner hearth sidewall, be provided with second swirl vane between tertiary chamber rear portion and the secondary air chamber rear portion, be equipped with air-flow plate in secondary air chamber and the tertiary chamber.During work, regulate combustion air volume (air quantity of secondary air chamber and tertiary chamber) earlier, then regulate the primary air flow in the airduct one time, open central tube and ozone generator then, after treating that furnace pressure is stable, the coal gas ignition rifle is inserted central tube to central tube back outlet place, and some coal gas, then by an airduct supply coal dust, from the breeze airflow of an airduct in being divided under the effect of bluff body, outer two strands of breeze airflows, the breeze airflow that enters the one-level precombustion chamber is lighted by gas burner, in the ignition procedures with the secondary precombustion chamber in the breeze airflow mixing ignition, the high-temperature flue gas stream ejection that after fully lighting, produces, and meet with secondary wind and tertiary air from secondary air chamber and tertiary chamber step by step, in burner hearth, mix and sustained combustion.
The front portion of secondary precombustion chamber and one-level precombustion chamber is the sleeve-like structure of front side diameter less than the rear side diameter, and it is more reasonable that this structural design makes that the two strands of breeze airflows in innner and outer distribute, and lights effect and further improve.
Ozone generator is oxygen type intermediate frequency (400-1000Hz) generator, oxygen type high frequency (greater than 1000Hz) generator, air type medium-frequency generator or air type radio-frequency generator, and result of use is better.
The tip of bluff body is positioned at the center position of central tube rear end face, further improves the mixability of ignition chamber's breeze airflow and ozone-air or oxygen, guarantees to light effect.
The present invention has overcome the problem that the powder feeding of existing industrial coal powder boiler employing cold wind, cold wind or the combustion-supporting existence of Cryogenic air influence the coal adaptive capacity by designing dexterously, realize fully without fuel oil, only need to satisfy the purpose of steam generator system cold start-up preferably and steady combustion effect by coal gas ignition; Ozone technology of preparing maturation, the oil-free coal gas ignition system reform is little, and the cost-effective while is reliable; The adaptability of coal is wide simultaneously, helps the marketing of industrial coal powder boiler.
Description of drawings
Fig. 1 is the schematic diagram of pulverized coal industrial boiler oil-free coal gas ignition of the present invention and smooth combustion apparatus.
Among the figure: 1-central tube, airduct of 2-, 3-ozone generator, 4-source of the gas pipe, 5-secondary precombustion chamber, 6-one-level precombustion chamber, 7-bluff body, 8-secondary air chamber, 9-first swirl vane, 10-tertiary chamber, 11-second swirl vane, 12-air-flow plate.
The specific embodiment
After pulverized coal industrial boiler oil-free coal gas ignition and smooth burning method, the mixture of wind and coal dust are provided with an airduct 2 ejections of central tube 1 through the axis place, the breeze airflow that to form two strands be center, about layer distribution with airduct 2 axis; Ejection ozone-containing air or oxygen in the central tube 1 adopts coal gas ignition rifle point coal gas then and then lights the breeze airflow of nexine ozone-containing air or oxygen combustion-supporting time, and the breeze airflow of nexine is lighted outer field breeze airflow then.The shared volume content of ozone is 8.2%-9.8% in the central tube 1 interior air or oxygen, the volume of oxygen is the 5.5%-7.5% of oxygen volume in the airduct (2) in the central tube (1), and lighting before the coal gas ignition rifle primary air flows in the airduct 2 is fully loaded 70%-80%.The central tube 1 that is positioned at burner the place ahead is provided with the ozone generator 3 that is communicated with it, ozone generator 3 is provided with the source of the gas pipe 4 that is communicated with it, the central tube 1 overcoat once rear end of airduct 2 and an airduct 2 is provided with the shell-like secondary precombustion chamber 5 that is communicated with it, be with in the secondary precombustion chamber 5 and its fixing shell-like one-level precombustion chamber 6, be fixed with the bluff body 7 that is positioned at rear, central tube 1 rear end face center in the one-level precombustion chamber 6, the secondary precombustion chamber 5 outer secondary air chambers 8 that are with, and secondary precombustion chamber 5 is positioned at the shell-like rear portion of secondary air chamber 8, be provided with first swirl vane 9 between secondary precombustion chamber 5 and secondary air chamber 8 rear portions, secondary air chamber is with tertiary chamber 10 outside 8 rear portions, and secondary air chamber 8 rear portions are positioned at the shell-like rear portion of tertiary chamber 10, tertiary chamber 10 rear ends are communicated with burner hearth sidewall, be provided with second swirl vane 11 between tertiary chamber 10 rear portions and secondary air chamber 8 rear portions, be equipped with air-flow plate 12 in secondary air chamber 8 and the tertiary chamber 10; The front portion of secondary precombustion chamber 5 and one-level precombustion chamber 6 is the sleeve-like structure of front side diameter less than the rear side diameter; Ozone generator 3 is oxygen type medium-frequency generator, oxygen type radio-frequency generator, air type medium-frequency generator or air type radio-frequency generator; The tip of bluff body 7 is positioned at the center position of central tube 1 rear end face.In the specific implementation process, after coal dust was lighted, adjusting combustion air volume item by item, coal dust amount and primary air flow were up to satisfying system's operating load requirement.
Claims (2)
1. pulverized coal industrial boiler oil-free coal gas ignition and smooth burning method, it is characterized in that: after the mixture of wind and coal dust is provided with an airduct (2) ejection of central tube (1) through the axis place, forming two strands is the center with an airduct (2) axis, the breeze airflow that about layer distributes, ejection ozone-containing air or oxygen in the central tube (1), adopt coal gas ignition rifle point coal gas then and then at the combustion-supporting breeze airflow of lighting down nexine of ozone-containing air or oxygen, the breeze airflow of nexine is lighted outer field breeze airflow then, wherein the shared volume content of ozone is 8.2%-9.8% in the interior air or oxygen of central tube (1), and the volume of oxygen is the 5.5%-7.5% of oxygen volume in the airduct (2) in the central tube (1).
2. pulverized coal industrial boiler oil-free coal gas ignition according to claim 1 and smooth burning method is characterized in that: light that the primary air flow in the airduct (2) is fully loaded 70%-80% before the coal gas ignition rifle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010235517 CN101881443A (en) | 2010-07-21 | 2010-07-21 | Fuel-free gas igniting and combustion stabilizing method for industrial coal powder boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010235517 CN101881443A (en) | 2010-07-21 | 2010-07-21 | Fuel-free gas igniting and combustion stabilizing method for industrial coal powder boiler |
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| Publication Number | Publication Date |
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| CN101881443A true CN101881443A (en) | 2010-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010235517 Withdrawn CN101881443A (en) | 2010-07-21 | 2010-07-21 | Fuel-free gas igniting and combustion stabilizing method for industrial coal powder boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107131496A (en) * | 2017-04-07 | 2017-09-05 | 贵州电网有限责任公司电力科学研究院 | The Splittable burner structure and dividing method of a kind of station boiler |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0627561B2 (en) * | 1983-12-13 | 1994-04-13 | バブコツク日立株式会社 | Pulverized coal combustion equipment |
| CN2258251Y (en) * | 1996-05-30 | 1997-07-23 | 哈尔滨普华煤燃烧技术开发中心 | Cyclone beam burner |
| CN1193089A (en) * | 1997-03-10 | 1998-09-16 | 张权润 | Method for aiding combustion using ozone |
| CN2325646Y (en) * | 1997-12-31 | 1999-06-23 | 华中理工大学 | Burner |
| CN2363177Y (en) * | 1999-01-27 | 2000-02-09 | 武汉水利电力大学 | Bowl shape swirl coal powder burner |
| CN1079524C (en) * | 1995-11-24 | 2002-02-20 | 浙江大学 | Controllable gradation separating spiral-flow powdered coal burning method and device |
-
2010
- 2010-07-21 CN CN 201010235517 patent/CN101881443A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0627561B2 (en) * | 1983-12-13 | 1994-04-13 | バブコツク日立株式会社 | Pulverized coal combustion equipment |
| CN1079524C (en) * | 1995-11-24 | 2002-02-20 | 浙江大学 | Controllable gradation separating spiral-flow powdered coal burning method and device |
| CN2258251Y (en) * | 1996-05-30 | 1997-07-23 | 哈尔滨普华煤燃烧技术开发中心 | Cyclone beam burner |
| CN1193089A (en) * | 1997-03-10 | 1998-09-16 | 张权润 | Method for aiding combustion using ozone |
| CN2325646Y (en) * | 1997-12-31 | 1999-06-23 | 华中理工大学 | Burner |
| CN2363177Y (en) * | 1999-01-27 | 2000-02-09 | 武汉水利电力大学 | Bowl shape swirl coal powder burner |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107131496A (en) * | 2017-04-07 | 2017-09-05 | 贵州电网有限责任公司电力科学研究院 | The Splittable burner structure and dividing method of a kind of station boiler |
| CN107131496B (en) * | 2017-04-07 | 2023-10-27 | 贵州电网有限责任公司电力科学研究院 | Split type burner structure and split method of power station boiler |
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| PB01 | Publication | ||
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Open date: 20101110 |