CN1095971C - Radial cyclone-type coal burner - Google Patents
Radial cyclone-type coal burner Download PDFInfo
- Publication number
- CN1095971C CN1095971C CN96122344A CN96122344A CN1095971C CN 1095971 C CN1095971 C CN 1095971C CN 96122344 A CN96122344 A CN 96122344A CN 96122344 A CN96122344 A CN 96122344A CN 1095971 C CN1095971 C CN 1095971C
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- China
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- coal
- air opening
- burner
- cyclone
- primary air
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Abstract
The present invention relates to a radial rotational flow coal powder combustor with large granularity difference, which belongs to the technical field of coal powder combustion. The present invention comprises a secondary air opening (1), a primary air opening(2), a center air pipe (3) and a pipe (4)for installing an igniting-oil nozzle which are orderly arranged from exterior to interior. The present invention is characterized in that a super-thinning coal powder igniting and combusting device (5) is arranged between the primary air opening(2) and the center air pipe (3); rotational flow devices (6) are respectively arranged in the secondary air opening (1), the primary air opening(2) and super-thinning coal power combusting device (5). The present invention has high load adjustment adaptability and high fuel adaptability, and thus, a coal powder boiler can be stably operated under the condition of 40% of super-low loads without flameout.
Description
Technical field
The invention belongs to coal powder burning technology field, relate in particular to a kind of vortex burner.
Background technology
Pulverized-coal fired boiler generally can only move the bad adaptability of its coal dust quality more than 70% load.When coal dust quality fluctuation (mainly being that ash content and moisture increase) or underload, unstable or flame-out can't normally operation of boiler operatiopn.The oil consumption of pulverized-coal fired boiler start-up course is higher in addition, and the pulverized-coal fired boiler of a 200MW starts needs about 10 tons in heavy oil approximately.For solving the coal powder boiler combustion problem, researchers develop the coal burner of multiple pattern, and the underrun ability of pulverized-coal fired boiler is made moderate progress, can be at 50% above load operation, be difficult to adapt to but reach following underrun to 50% usually, and coal dust quality bad adaptability.
Summary of the invention
The purpose of this invention is to provide a kind of radial cyclone-type coal burner that good load is regulated adaptive capacity and fuel adaptive capacity that has, make the boiler can be in 50% following underload stable operation, especially can make pulverized-coal fired boiler 40% and following ultra-low load under stable operation and not stopping working.
The present invention seeks to be achieved through the following technical solutions: radial cyclone-type coal burner comprises overfiren air port (1), the primary air nozzle (2) for common coal dust and a wind, central air hose (3) and the igniting oil burner nozzle installing pipe (4) that ecto-entad sets gradually, it is characterized in that: between primary air nozzle (2) and central air hose (3), be provided with the superfine powdered coal ignition device (5) of granularity≤20 μ m, in overfiren air port (1), primary air nozzle (2) and superfine powdered coal burner (5), be respectively arranged with cyclone (6).
The invention has the advantages that: (1) can realize the ultra-low load operation of pulverized-coal fired boiler, load can reach 40% or below; (2) this burner has good coal adaptability, highly versatile; (3) can realize that the pulverized coal boiler ignition startup need not be oily or few with oil, the reduction start-up cost; (4) utilize the smooth combustion of superfine powdered coal ignition device, needn't oil spout under underload and the ultra-low load combustion-supporting, can reduce operating cost greatly, realize economical operation; (5) owing to improved combustion position, the efficiency of combustion of boiler and the thermal efficiency improve.The present invention can have big economical, societal benefits in the extensive use of coal dust firing field.
The invention will be further described below in conjunction with accompanying drawing and embodiment shown in the drawings.
Description of drawings
Fig. 1 is a structural representation of the present invention.
The specific embodiment
In conjunction with the accompanying drawings, the present invention mainly be the overfiren air port (1) that sets gradually by ecto-entad, the multilayer sleeve device that constituted for superfine powdered coal igniter (5), central air hose (3), igniting oil burner nozzle installing pipe (4) and the cyclone (6) of the primary air nozzle (2) of common coal dust and a wind, granularity≤20 μ m.The coal dust firing air-flow is divided into two strands and sends into turbulent burner: the common coal dust of particle diameter≤500 μ m sprays into boiler furnace from primary air nozzle (2) after cyclone (6) produces the high speed rotation under the carrying of a general mood stream, form swirling eddy layer (9).The superfine powdered coal of particle diameter≤20 μ m carries down at air-flow and sprays into boiler furnace formation superfine powdered coal swirling eddy layer (8) from superfine powdered coal igniter (5) through cyclone (6).Superfine powdered coal swirling eddy layer (8) is in a wind swirling eddy layer (9) inboard.The coal dust further needed air of burning is sent into through cyclone (6) rotation from overfiren air port (1) as secondary wind, form the secondary general mood fluid layer (10) of rotation at a high speed in a general mood stream outside, thereby form thick pulverized coal particle distribution mode outside the turbulent burner footpath is inwardly thin, i.e. bulky grain difference rotational flow coal dust air-flow radially.The high speed rotation of primary and secondary air air-flow and superfine powdered coal air-flow, in coarsegrain difference coal dust firing air-flow radially, be formed centrally recirculating zone (7) entrainment in the boiler furnace high-temperature flue gas near the root of superfine powdered coal air-flow since superfine powdered coal to have specific area big, respond is strong, particle diameter is little, the particle temperature rise speed is fast, the diffusion velocity of oxygen is fast, ignition heat is low, characteristics such as ignition temperature is low, make superfine powdered coal airflow layer (8) rapid fire burns, light common breeze airflow layer (9) with the heat of its generation, and make its smooth combustion.Therefore the double action that has igniting and smooth combustion.
The big I in high temperature gases recirculating district, center (7) is regulated control by cyclone (6), to be suitable for different quality coal dusts.
The combustion heat power of the superfine powdered coal ignition device (5) of cyclone-type coal burner of the present invention can be according to the 5%-30% that is not all vortex burner of coal dust quality.
Claims (2)
1. radial cyclone-type coal burner, comprise overfiren air port (1), primary air nozzle (2), central air hose (3) and igniting oil burner nozzle installing pipe (4) that ecto-entad sets gradually for common coal dust and a wind, it is characterized in that: between primary air nozzle (2) and central air hose (3), be provided with the superfine powdered coal ignition device (5) of granularity≤20 μ m, in overfiren air port (1), primary air nozzle (2) and superfine powdered coal ignition device (5), be respectively arranged with cyclone (6).
2. radial cyclone-type coal burner according to claim 1 is characterized in that: the combustion heat power of described superfine powdered coal ignition device (5) can be according to the 5%-30% that is not all vortex burner of coal dust quality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96122344A CN1095971C (en) | 1996-11-12 | 1996-11-12 | Radial cyclone-type coal burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96122344A CN1095971C (en) | 1996-11-12 | 1996-11-12 | Radial cyclone-type coal burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1182183A CN1182183A (en) | 1998-05-20 |
| CN1095971C true CN1095971C (en) | 2002-12-11 |
Family
ID=5127276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96122344A Expired - Fee Related CN1095971C (en) | 1996-11-12 | 1996-11-12 | Radial cyclone-type coal burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1095971C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434885A (en) * | 2011-12-15 | 2012-05-02 | 新兴河北工程技术有限公司 | Six-channel nozzle for industrial kiln |
| CN102913936B (en) * | 2012-10-26 | 2015-05-27 | 安徽工业大学 | Method for improving pulverized coal combustion performance and reducing NOx generation under O2/CO2 atmosphere |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54159741A (en) * | 1978-06-07 | 1979-12-17 | Mitsubishi Heavy Ind Ltd | Powdery fuel burner |
| JPS58127005A (en) * | 1982-01-22 | 1983-07-28 | Hitachi Ltd | Low nox burner using pulverized coal |
| CN2126893Y (en) * | 1992-06-23 | 1993-02-10 | 浙江大学 | Large measurement range, variable load, concentration or dilute phase coal powder burning device |
| EP0571704A2 (en) * | 1992-05-29 | 1993-12-01 | Deutsche Babcock Energie- und Umwelttechnik Aktiengesellschaft | Burner for pulverulent fuel |
| CN2172404Y (en) * | 1993-11-09 | 1994-07-20 | 哈尔滨工业大学 | Radial thick/thin spiral flow powdered coal burner |
| CN1098180A (en) * | 1993-07-30 | 1995-02-01 | 巴考克·莱也茨发电厂技术有限公司 | The burner of burning pul verized fuel |
| CN2281478Y (en) * | 1996-11-12 | 1998-05-13 | 孙键 | Vortex coal power burner for large diffferences of power diameters |
-
1996
- 1996-11-12 CN CN96122344A patent/CN1095971C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54159741A (en) * | 1978-06-07 | 1979-12-17 | Mitsubishi Heavy Ind Ltd | Powdery fuel burner |
| JPS58127005A (en) * | 1982-01-22 | 1983-07-28 | Hitachi Ltd | Low nox burner using pulverized coal |
| EP0571704A2 (en) * | 1992-05-29 | 1993-12-01 | Deutsche Babcock Energie- und Umwelttechnik Aktiengesellschaft | Burner for pulverulent fuel |
| CN2126893Y (en) * | 1992-06-23 | 1993-02-10 | 浙江大学 | Large measurement range, variable load, concentration or dilute phase coal powder burning device |
| CN1098180A (en) * | 1993-07-30 | 1995-02-01 | 巴考克·莱也茨发电厂技术有限公司 | The burner of burning pul verized fuel |
| CN2172404Y (en) * | 1993-11-09 | 1994-07-20 | 哈尔滨工业大学 | Radial thick/thin spiral flow powdered coal burner |
| CN2281478Y (en) * | 1996-11-12 | 1998-05-13 | 孙键 | Vortex coal power burner for large diffferences of power diameters |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1182183A (en) | 1998-05-20 |
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