CN1076261A - Coal powder burner - Google Patents
Coal powder burner Download PDFInfo
- Publication number
- CN1076261A CN1076261A CN 92106425 CN92106425A CN1076261A CN 1076261 A CN1076261 A CN 1076261A CN 92106425 CN92106425 CN 92106425 CN 92106425 A CN92106425 A CN 92106425A CN 1076261 A CN1076261 A CN 1076261A
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- China
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- pulverized coal
- coal
- powder burner
- coal powder
- distributor
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Abstract
The present invention relates to a kind of coal powder burner.By centrifugal elbow, the Pulverized Coal Concentration distributor, the characteristics of the coal powder burner that shunt catheter and spout are formed are that a columnar Pulverized Coal Concentration distributor is arranged.The cylindrical shell inwall of distributor is equipped with helix fin, with the direction of the bias pulverized coal air-flow after the helix fin change centrifugation, the bias pulverized coal air-flow is adjusted to needed position respectively.In the pulverized coal concentrator outlet shunt catheter is arranged, deep or light two strands of breeze airflows separately, introduce deep or light nozzles respectively.This coal powder burner can be widely used on the corner-fired boiler that uses low-grade coal, improves boiler combustion stability, saves underload and helps fuel oil.
Description
The present invention relates to a kind of coal powder burner, especially for the coal powder burner of corner firing pulverized-coal fired boiler.
Most of pulverized-coal fired boilers in the industrial production all will burn a large amount of fuel oil earlier in start-up course, could drop into coal burner smooth combustion then.In addition, pulverized-coal fired boiler is lower than 70% o'clock combustion instability at load, smooth combustion during for the maintenance underload, and it is combustion-supporting to drop into oil burner, consumes considerable fuel oil.
Disclose a kind of variation coal powder density burner April 27 nineteen ninety in the variation coal powder density Burner Technology evaluation meeting that Jiangxi divides suitable power plant to hold.This burner can change the concentration of breeze airflow, improves its flammability, improves the boiler low load stable combustion performance.The shortcoming of this burner is that the cocnentration factor of pulverized coal concentrator is lower, and resistance is big, easily stops up, and it is more serious to wear and tear, and margin of commutation is little.
The purpose of this invention is to provide a kind of coal powder burner, the deep or light distribution ratio height of its pulverized coal concentrator, resistance be little, do not stop up, wear-resistant, margin of commutation is big, and can adapt to different atures of coal and bigger load variations scope, keeps flameholding.
The present invention is achieved in that breeze airflow when flowing through elbow, because centrifugal action, most pulverized coal particles are thrown to the outside of elbow, so just separates the elbow outside at coal dust and forms the thick coal culm air-flow, the inboard thin powdered coal air-flow that forms.At the elbow outlet side helix fin formula Pulverized Coal Concentration distributor is installed, changes deep or light two strands of coal dusts with helix fin, the direction of air-flow is adjusted to needed position to the bias pulverized coal air-flow.At the Pulverized Coal Concentration export distributor shunt catheter is arranged, deep or light two strands of air-flows separately, send into deep or light nozzles respectively.
The Pulverized Coal Concentration distributor has a garden cylindrical outer casing, and inwall is equipped with helix fin.The structural characteristic parameter of Pulverized Coal Concentration distributor is: the pitch angle alpha will of helix fin is 30 °～80 °, and commutation angle β is 5 °～270 °, and the helix fin height is 0.1～1.0 with the ratio H/D of garden tube internal diameter, and the garden tube length is 1.0-10.0 with the ratio L/D of internal diameter.Adjust the different numerical value of structural parameters, can obtain different distribution locations and cocnentration factor.
Coal powder burner can also be realized like this: two helix fins are housed on the inwall of the garden cylindrical outer casing of Pulverized Coal Concentration distributor, and the angle theta between two fins is 20 °～340 °.
Coal powder burner can also be realized like this: only adorn a slice helix fin on the garden cylindrical outer casing inwall of Pulverized Coal Concentration distributor, the fin height is 1.0 with the ratio H/D of garden tube internal diameter.
The Pulverized Coal Concentration distributor adopts wear resistant cast iron or cast-steel integral casting.
Advantage of the present invention:
(1) simple in structure, it is convenient to install, change;
(2) resistance is little, do not stop up, and light abrasion, the life-span is long;
(3) deep or light distribution ratio height can improve the stability of burning;
(4) can increase substantially the peak modulation capacity of unit, save a large amount of igniting and help fuel oil.
Be further described below in conjunction with accompanying drawing.Fig. 1 is the structural configuration schematic diagram of single coal powder burner, Fig. 2, Fig. 3 be the Pulverized Coal Concentration distributor just, side view.
As shown in Figure 1, breeze airflow enters centrifugation elbow 2 through an airduct road 1, coal dust is by centrifugation, form the thick coal culm air-flow in the elbow outside, the inboard thin powdered coal air-flow that forms is by Pulverized Coal Concentration distributor 4, after will deep or light two breeze airflows leading by means of helix fin 3, by a shunt catheter 5 the low concentration breeze airflow is caused light nozzles 6, the high concentration pulverized coal air-flow is caused dense nozzles 7.
Coal powder burner of the present invention can be widely used on the corner-fired boiler that uses low-grade coal, improves boiler combustion stability, enlarges peak modulation capacity, and the fuel-economizing underload helps fuel oil.
Claims (4)
1, a kind of coal powder burner, it comprises centrifugation elbow, Pulverized Coal Concentration distributor, shunt catheter and spout, it is characterized in that: the Pulverized Coal Concentration distributor has a garden cylindrical outer casing, outer casing inner wall is equipped with the spirality fin, the pitch angle alpha will of helix fin is 30 °～80 °, commutation angle β is 5 °～270 °, and the ratio H/D of helix fin height and garden tube internal diameter is between 0.1～1.0, and the ratio L/D of garden tube length degree and internal diameter is between 1.0～10.0.
2, by the described coal powder burner of claim 1, it is characterized in that: on the garden cylindrical outer casing inwall of said Pulverized Coal Concentration distributor two helix fins are housed, the angle theta between two fins is between 20 °～340 °.
3, by the described coal powder burner of claim 1, it is characterized in that: only adorn a slice helix fin on the garden cylindrical outer casing inwall of said Pulverized Coal Concentration distributor, the fin height is 1.0 with the ratio H/D of garden tube internal diameter.
4, by the described coal powder burner of claim 1, its characteristic is: said Pulverized Coal Concentration distributor adopts wear resistant cast iron or cast-steel integral casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92106425 CN1031957C (en) | 1992-03-07 | 1992-03-07 | Coal powder burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92106425 CN1031957C (en) | 1992-03-07 | 1992-03-07 | Coal powder burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1076261A true CN1076261A (en) | 1993-09-15 |
| CN1031957C CN1031957C (en) | 1996-06-05 |
Family
ID=4942096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92106425 Expired - Fee Related CN1031957C (en) | 1992-03-07 | 1992-03-07 | Coal powder burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1031957C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1044281C (en) * | 1994-07-01 | 1999-07-21 | 浙江大学 | Adjustable concentration low load automatic smooth burning and slag-bonding protective device for coal powder furnace |
| CN100549519C (en) * | 2007-09-25 | 2009-10-14 | 深圳东方锅炉控制有限公司 | A kind of vortex burner |
| CN101865460A (en) * | 2010-07-07 | 2010-10-20 | 上海理工大学 | Anti-bias DC burner |
| CN102226520A (en) * | 2011-04-25 | 2011-10-26 | 哈尔滨工业大学 | Combustion device and method for directly igniting vertical shade pulverized coal airflow |
| WO2012059038A1 (en) * | 2010-11-01 | 2012-05-10 | 烟台龙源电力技术股份有限公司 | Pulverized coal burner and pulverized coal fired boiler |
| CN102454983A (en) * | 2010-11-01 | 2012-05-16 | 烟台龙源电力技术股份有限公司 | Pulverized coal concentrator, pulverized coal burner and pulverized coal boiler |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102297425B (en) * | 2011-06-27 | 2013-07-31 | 中国科学院过程工程研究所 | Pulverized coal decoupling combustor and decoupling combustion method thereof |
-
1992
- 1992-03-07 CN CN 92106425 patent/CN1031957C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1044281C (en) * | 1994-07-01 | 1999-07-21 | 浙江大学 | Adjustable concentration low load automatic smooth burning and slag-bonding protective device for coal powder furnace |
| CN100549519C (en) * | 2007-09-25 | 2009-10-14 | 深圳东方锅炉控制有限公司 | A kind of vortex burner |
| CN101865460A (en) * | 2010-07-07 | 2010-10-20 | 上海理工大学 | Anti-bias DC burner |
| WO2012059038A1 (en) * | 2010-11-01 | 2012-05-10 | 烟台龙源电力技术股份有限公司 | Pulverized coal burner and pulverized coal fired boiler |
| CN102454983A (en) * | 2010-11-01 | 2012-05-16 | 烟台龙源电力技术股份有限公司 | Pulverized coal concentrator, pulverized coal burner and pulverized coal boiler |
| CN102226520A (en) * | 2011-04-25 | 2011-10-26 | 哈尔滨工业大学 | Combustion device and method for directly igniting vertical shade pulverized coal airflow |
| CN102226520B (en) * | 2011-04-25 | 2013-04-10 | 哈尔滨工业大学 | Combustion device and method for directly igniting vertical shade pulverized coal airflow |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1031957C (en) | 1996-06-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| OR01 | Other related matters | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |