CN2281478Y - Vortex coal power burner for large diffferences of power diameters - Google Patents
Vortex coal power burner for large diffferences of power diameters Download PDFInfo
- Publication number
- CN2281478Y CN2281478Y CN 96245774 CN96245774U CN2281478Y CN 2281478 Y CN2281478 Y CN 2281478Y CN 96245774 CN96245774 CN 96245774 CN 96245774 U CN96245774 U CN 96245774U CN 2281478 Y CN2281478 Y CN 2281478Y
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- utility
- coal
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- air port
- burner
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- Expired - Fee Related
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Abstract
The utility model relates to a vortex coal powder burner for large differences of power diameters, which belongs to the technical field of coal powder firing. The utility model comprises a secondary air port (1), a primary air port (2), a central air pipe (3) and a nozzle installing pipe (4) for igniting kerosene from the exterior to the interior. The utility model is characterized in that a combustion device (5) for igniting super refinement coal power is arranged between the primary air port (2) and the central air pipe (3); the secondary air port (1), the primary air port (2) and the combustion device (5) for igniting super refinement coal powder are respectively provided with a cyclone (6). The utility model has the advantages of favorable adaptability of load regulation and fuel adaptability so that a pulverized coal powder burner of the utility model steadily operates under super low load which is lower than or equal to 40% without extinguishing.
Description
The utility model belongs to coal powder burning technology field, relates in particular to a kind of radial cyclone-type coal burner.
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 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.
The purpose of this utility model provides a kind of radially big grain difference vortex 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 utility model purpose is achieved through the following technical solutions: 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, it is characterized in that: between primary air nozzle (2) and central air hose (3), be provided with superfine powdered coal ignition device (5), in overfiren air port (1), primary air nozzle (2) and superfine powdered coal burner (5), be respectively arranged with cyclone (6).
Advantage of the present utility model is: (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 utility model can have big economical, societal benefits in the extensive use of coal dust firing field.
The utility model is described in further detail below in conjunction with accompanying drawing and embodiment shown in the drawings.
Fig. 1 is a structural representation of the present utility model.
In conjunction with the accompanying drawings, the utility model mainly is the multilayer sleeve device that is made of overfiren air port (1), primary air nozzle (2), superfine powdered coal ignition device (5), central air hose (3), igniting oil burner nozzle installing pipe (4) and cyclone (6) that ecto-entad sets gradually.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 ignition device (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 formation thick pulverized coal particle distribution mode, i.e. radial cyclone-type breeze airflow outside the turbulent burner footpath is inwardly thin.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 the utility model cyclone-type coal burner can be according to the 5%-30% that is not all vortex burner of coal dust quality.
Claims (1)
1, a kind of 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, it is characterized in that: between primary air nozzle (2) and central air hose (3), be provided with superfine powdered coal ignition device (5), in overfiren air port (1), primary air nozzle (2) and superfine powdered coal burner (5), be respectively arranged with cyclone (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96245774 CN2281478Y (en) | 1996-11-12 | 1996-11-12 | Vortex coal power burner for large diffferences of power diameters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96245774 CN2281478Y (en) | 1996-11-12 | 1996-11-12 | Vortex coal power burner for large diffferences of power diameters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2281478Y true CN2281478Y (en) | 1998-05-13 |
Family
ID=33918701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96245774 Expired - Fee Related CN2281478Y (en) | 1996-11-12 | 1996-11-12 | Vortex coal power burner for large diffferences of power diameters |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2281478Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095971C (en) * | 1996-11-12 | 2002-12-11 | 孙键 | Radial cyclone-type coal burner |
-
1996
- 1996-11-12 CN CN 96245774 patent/CN2281478Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095971C (en) * | 1996-11-12 | 2002-12-11 | 孙键 | Radial cyclone-type coal burner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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 |