CN101187470B - Little oil ignited swirling pulverized coal combustion device - Google Patents
Little oil ignited swirling pulverized coal combustion device Download PDFInfo
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- CN101187470B CN101187470B CN2007101449499A CN200710144949A CN101187470B CN 101187470 B CN101187470 B CN 101187470B CN 2007101449499 A CN2007101449499 A CN 2007101449499A CN 200710144949 A CN200710144949 A CN 200710144949A CN 101187470 B CN101187470 B CN 101187470B
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- eddy flow
- pipe
- fan housing
- oil
- coal combustion
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Abstract
A low-oil-consumption ignition swirling pulverized coal burning device relates to a pulverized coal burning device. The invention aims to solve the problems of large oil consumption, energy waste and high pollutant discharge of a coal-fired boiler existing in the burning device in the coal-fired boiler of power plants. An inlet end of an inner wall swirling wind cover (3-1) in the invention is connected with an outlet end of an external pipe (2-7), a passage exit in a duct (3-8) is respectively connected with the inner wall swirling wind cover (3-1), a swirling outer secondary wind cover (3-4) and a direct secondary wind cover (3-9), and the passage existing in the duct (3-8) are respectively provided with an air volume regulation plate (3-7). The invention has the advantage of reasonable structure, design and arrangement. The invention burns pulverized coal by using a small amount of oil, oil and gas, natural gas or coal gas, which can save ignition energy, and reduces the discharge of pollutant. The device of the invention has higher safety and reliable properties, which can save 40%-90% fuel oil compared with the prior art.
Description
Technical field
The present invention relates to a kind of coal powder burner.
Background technology
The burner of existing coal burning boiler of power station and torch oil gun be furnished with following several form: 1. burner and torch oil gun are arranged respectively, torch oil gun is arranged on the boiler fired coal combustion device but the torch oil gun oil nozzle points in the burner hearth, and this device all is an employing mechanical atomization oil gun; 2. oil gun is arranged in the spout of burner and can adopts mechanical atomization or steam atomization.Above-mentioned two kinds of burners and torch oil gun exist amount of fuel big, cause problems such as energy waste, coal-burning boiler pollutant emission height.
Summary of the invention
The objective of the invention is for the burner that solves existing coal burning boiler of power station exist big with oil mass, cause energy waste, the high problem of coal-burning boiler pollutant emission, a kind of little oil ignited swirling pulverized coal combustion device is provided.The present invention comprises coal-fired igniter 2 and fractional combustion device 3, coal-fired igniter 2 comprises oil, coal combustion organ pipe 2-2, main fuel pipe 2-4, fire inspection pipe 2-5, auxiliary fuel pipe 2-6 and outer tube 2-7, oil, coal combustion organ pipe 2-2 is arranged on outlet one side in the outer tube 2-7, the port of export of main fuel pipe 2-4 and oil, one side of coal combustion organ pipe 2-2 entrance point is connected, fixedly connected with outer tube 2-7 in the middle part of main fuel pipe 2-4, the port of export of auxiliary fuel pipe 2-6 and oil, one side of the coal combustion organ pipe 2-2 port of export is connected, fixedly connected with outer tube 2-7 in the middle part of auxiliary fuel pipe 2-6, fire inspection pipe 2-5 is arranged between main fuel pipe 2-4 and the auxiliary fuel pipe 2-6, the end and oil of fire inspection pipe 2-5, coal combustion organ pipe 2-2 is connected, and fixedlys connected with outer tube 2-7 in the middle part of fire inspection pipe 2-5; Fractional combustion device 3 comprises inwall eddy flow fan housing 3-1, eddy flow outer secondary fan housing 3-4, swirl vane 3-6, air-flow plate 3-7, air channel 3-8, direct current secondary fan housing 3-9 and interior pipe 3-11.The entrance point of inwall eddy flow fan housing 3-1 is connected with the outer wall of the outer tube 2-7 port of export, interior pipe 3-11 is fixed in the inwall eddy flow fan housing 3-1, the entrance point of interior pipe 3-11 is connected with the port of export of outer tube 2-7, the outer secondary fan housing 3-4 of eddy flow is set in the outside of inwall eddy flow fan housing 3-1, direct current secondary fan housing 3-9 is set in the outside of the outer secondary fan housing 3-4 of eddy flow, be provided with swirl vane 3-6 between the outer secondary fan housing 3-4 of inwall eddy flow fan housing 3-1 and eddy flow, channel outlet in the 3-8 of air channel respectively with inwall eddy flow fan housing 3-1, outer secondary fan housing 3-4 of eddy flow and direct current secondary fan housing 3-9 are connected, feeder connection place in the 3-8 of air channel is provided with air-flow plate 3-7 respectively, between interior pipe 3-11 and the inwall eddy flow fan housing 3-1 is secondary air duct 3-3 in the eddy flow, being the outer secondary air duct 3-5 of eddy flow between the outer secondary fan housing 3-4 of inwall eddy flow fan housing 3-1 and eddy flow, is direct current secondary air duct 3-10 between outer secondary fan housing 3-4 of eddy flow and the direct current secondary fan housing 3-9.The present invention adopts the fractional combustion new technology, utilizes the pettiness oil mass to light high concentration pulverized coal in this device, under not improving the situation of not firing composition in the boiler exhaust gas, and reduces the NOx discharging significantly.Make this device in primary combustion, adopt coal dust high concentration, low air ratio and high temperature to promote the thermal decomposition of coal, so can emit the nitrogen content of coal composition and reduce residual charcoal, cause the NOx of generation to pass through the reduction flame reduction that forms in the back backflow part, the generation that decomposition suppresses NOx; By regulating the direct current secondary air flow, can control the size of this device spout eddy flow extended corner, avoid the adherent generation coking of coal dust, and direct current secondary wind formation oxidizing atmosphere between coal dust and water-cooled ratio is avoided water-cooling wall generation high temperature corrosion.The present invention has the favorably situated advantage of structural design.The present invention uses oil, oil gas, natural gas or the coal gas of trace can firing coal-dust, can save the igniting energy, reduce the discharging of pollutant.Apparatus of the present invention have very high security and unfailing performance.The present invention compared with prior art can save 40%～90% fuel oil (oil gas, natural gas or coal gas).
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present invention, and Fig. 2 is the A-A cutaway view of Fig. 1.Reference numeral 1 among Fig. 1 is airduct of boiler.
The specific embodiment
The specific embodiment one: (referring to Fig. 1, Fig. 2) present embodiment is made up of coal-fired igniter 2 and fractional combustion device 3, coal-fired igniter 2 is by oil, coal combustion organ pipe 2-2, main fuel pipe 2-4, fire inspection pipe 2-5, auxiliary fuel pipe 2-6 and outer tube 2-7 form, oil, coal combustion organ pipe 2-2 is arranged on outlet one side in the outer tube 2-7, the port of export of main fuel pipe 2-4 and oil, one side of coal combustion organ pipe 2-2 entrance point is connected, fixedly connected with outer tube 2-7 in the middle part of main fuel pipe 2-4, the port of export of auxiliary fuel pipe 2-6 and oil, one side of the coal combustion organ pipe 2-2 port of export is connected, fixedly connected with outer tube 2-7 in the middle part of auxiliary fuel pipe 2-6, fire inspection pipe 2-5 is arranged between main fuel pipe 2-4 and the auxiliary fuel pipe 2-6, the end and oil of fire inspection pipe 2-5, coal combustion organ pipe 2-2 is connected, and fixedlys connected with outer tube 2-7 in the middle part of fire inspection pipe 2-5; Fractional combustion device 3 is by inwall eddy flow fan housing 3-1, the outer secondary fan housing 3-4 of eddy flow, swirl vane 3-6, air-flow plate 3-7, air channel 3-8, direct current secondary fan housing 3-9 and interior pipe 3-11 form, the entrance point of inwall eddy flow fan housing 3-1 is connected with the outer wall of the outer tube 2-7 port of export, interior pipe 3-11 is fixed in the inwall eddy flow fan housing 3-1, the entrance point of interior pipe 3-11 is connected with the port of export of outer tube 2-7, the outer secondary fan housing 3-4 of eddy flow is set in the outside of inwall eddy flow fan housing 3-1, direct current secondary fan housing 3-9 is set in the outside of the outer secondary fan housing 3-4 of eddy flow, be provided with swirl vane 3-6 between the outer secondary fan housing 3-4 of inwall eddy flow fan housing 3-1 and eddy flow, channel outlet in the 3-8 of air channel respectively with inwall eddy flow fan housing 3-1, outer secondary fan housing 3-4 of eddy flow and direct current secondary fan housing 3-9 are connected, feeder connection place in the 3-8 of air channel is provided with air-flow plate 3-7 respectively, between interior pipe 3-11 and the inwall eddy flow fan housing 3-1 is secondary air duct 3-3 in the eddy flow, being the outer secondary air duct 3-5 of eddy flow between the outer secondary fan housing 3-4 of inwall eddy flow fan housing 3-1 and eddy flow, is direct current secondary air duct 3-10 between outer secondary fan housing 3-4 of eddy flow and the direct current secondary fan housing 3-9.The entrance point of outer tube 2-7 is connected with the port of export of an airduct 1 of boiler.
The specific embodiment two: the difference of (referring to Fig. 1, Fig. 2) present embodiment and the specific embodiment one is that the sectional area of oil, coal combustion organ pipe 2-2 entrance point is less than the sectional area of the port of export.Other composition is identical with the specific embodiment one with annexation.The structure that changes oil, coal combustion organ pipe 2-2 combusting coal fines is spread gradually and with inwall eddy flow wind mend into the oxygen amount fully mix, help burning and flame at the degree of filling of swirling pulverized coal combustion device outlet.
The specific embodiment three: the difference of (referring to Fig. 1, Fig. 2) present embodiment and the specific embodiment one is that the sectional area of oil, the coal combustion organ pipe 2-2 port of export equals the sectional area of entrance point.Other composition is identical with the specific embodiment one with annexation.The structure that changes oil, coal combustion organ pipe 2-2 can improve the thick coal culm amount and reduce air capacity, thus combusting coal fines is spread gradually and with inwall eddy flow wind mend into the oxygen amount fully mix.
The specific embodiment four: the cross section of (referring to Fig. 1, Fig. 2) present embodiment oil, coal combustion organ pipe 2-2 is circle, ellipse or rectangle.Other composition is identical with the specific embodiment one with annexation.
The specific embodiment five: the difference of (referring to Fig. 1, Fig. 2) present embodiment and the specific embodiment four is that it increases eddy flow baffle 2-1, and eddy flow baffle 2-1 is arranged on the interior inside pipe wall face of outer tube 2-7.Other composition is identical with the specific embodiment four with annexation.The eddy flow baffle 2-1 that increases can make the coal dust that enters swirling pulverized coal combustion device produce rotation, can reduce the resistance of swirling pulverized coal combustion device, secondary wind and the outer secondary wind of eddy flow help the wind powder and mix and smooth combustion the spin intensity of coal dust in raising inwall eddy flow wind, the eddy flow.
The specific embodiment six: the difference of (referring to Fig. 1, Fig. 2) present embodiment and the specific embodiment five is that eddy flow baffle 2-1 is the annular baffle of sealing.Other composition is identical with the specific embodiment five with annexation.The annular baffle of sealing can improve coal dust and enter deep or light ratio in the swirling pulverized coal combustion device.
The specific embodiment seven: the difference of (referring to Fig. 1, Fig. 2) present embodiment and the specific embodiment six is that it has increased by the first baffle 2-3, and the first baffle 2-3 is arranged on the entrance point in the coal combustion organ pipe 2-2.Other composition is identical with the specific embodiment six with annexation.The first baffle 2-3 that increases can form steady combustion district and help lighting and smooth combustion coal dust.
The specific embodiment eight: the difference of (referring to Fig. 1, Fig. 2) present embodiment and the specific embodiment seven is that it has increased by the second baffle 2-8, and the second baffle 2-8 is arranged on fire and examines in the coal combustion organ pipe 2-2 that manages between 2-5 and the auxiliary fuel pipe 2-6.Other composition is identical with the specific embodiment seven with annexation.The second baffle 2-8 that increases can form steady combustion district and help lighting and smooth combustion coal dust.
The specific embodiment nine: the same point of (referring to Fig. 1, Fig. 2) present embodiment and the specific embodiment one is that it has increased fractional combustion eddy flow baffle 3-2, manages in the 3-11 in fractional combustion eddy flow baffle 3-2 is arranged on.Other composition is identical with the specific embodiment one with annexation.The fractional combustion baffle 3-2 that increases can make that thick coal culm strengthens rotation, delivery of supplemental oxygen amount, raising efficiency of combustion in the burning under the effect of fractional combustion eddy flow baffle.
Claims (9)
1. little oil ignited swirling pulverized coal combustion device, it comprises coal-fired igniter (2) and fractional combustion device (3), it is characterized in that coal-fired igniter (2) comprises oil, coal combustion organ pipe (2-2), main fuel pipe (2-4), fire inspection pipe (2-5), auxiliary fuel pipe (2-6) and outer tube (2-7), oil, coal combustion organ pipe (2-2) is arranged on outlet one side in the outer tube (2-7), the port of export of main fuel pipe (2-4) and oil, one side of coal combustion organ pipe (2-2) entrance point is connected, fixedly connected with outer tube (2-7) in the middle part of main fuel pipe (2-4), the port of export of auxiliary fuel pipe (2-6) and oil, one side of coal combustion organ pipe (2-2) port of export is connected, fixedly connected with outer tube (2-7) in the middle part of auxiliary fuel pipe (2-6), fire inspection pipe (2-5) is arranged between main fuel pipe (2-4) and the auxiliary fuel pipe (2-6), one end of fire inspection pipe (2-5) and oil, coal combustion organ pipe (2-2) is connected, and fixedlys connected with outer tube (2-7) in the middle part of fire inspection pipe 2-5; Fractional combustion device (3) comprises inwall eddy flow fan housing (3-1), the outer secondary fan housing (3-4) of eddy flow, swirl vane (3-6), air-flow plate (3-7), air channel (3-8), direct current secondary fan housing (3-9) and interior pipe (3-11), the entrance point of inwall eddy flow fan housing (3-1) is connected with the outer wall of outer tube (2-7) port of export, interior pipe (3-11) is fixed in the inwall eddy flow fan housing (3-1), the entrance point of interior pipe (3-11) is connected with the port of export of outer tube (2-7), the outer secondary fan housing (3-4) of eddy flow is set in the outside of inwall eddy flow fan housing (3-1), direct current secondary fan housing (3-9) is set in the outside of the outer secondary fan housing (3-4) of eddy flow, be provided with swirl vane (3-6) between the outer secondary fan housing (3-4) of inwall eddy flow fan housing (3-1) and eddy flow, channel outlet in the air channel (3-8) respectively with inwall eddy flow fan housing (3-1), outer secondary fan housing (3-4) of eddy flow and direct current secondary fan housing (3-9) are connected, feeder connection place in the air channel (3-8) is provided with air-flow plate (3-7) respectively, between interior pipe (3-11) and the inwall eddy flow fan housing (3-1) is secondary air duct in the eddy flow (3-3), being the outer secondary air duct (3-5) of eddy flow between the outer secondary fan housing (3-4) of inwall eddy flow fan housing (3-1) and eddy flow, is direct current secondary air duct (3-10) between outer secondary fan housing (3-4) of eddy flow and the direct current secondary fan housing (3-9).
2. a kind of little oil ignited swirling pulverized coal combustion device according to claim 1 is characterized in that the sectional area of the sectional area of oil, coal combustion organ pipe (2-2) entrance point less than the port of export.
3. a kind of little oil ignited swirling pulverized coal combustion device according to claim 1 is characterized in that the sectional area of oil, coal combustion organ pipe (2-2) port of export equals the sectional area of entrance point.
4. according to claim 1,2 or 3 described a kind of little oil ignited swirling pulverized coal combustion devices, it is characterized in that the cross section of oil, coal combustion organ pipe (2-2) is circle, ellipse or rectangle.
5. a kind of little oil ignited swirling pulverized coal combustion device according to claim 4 is characterized in that it also comprises eddy flow baffle (2-1), and eddy flow baffle (2-1) is arranged on the interior inside pipe wall face of outer tube (2-7).
6. a kind of little oil ignited swirling pulverized coal combustion device according to claim 5 is characterized in that the annular baffle of eddy flow baffle (2-1) for sealing.
7. a kind of little oil ignited swirling pulverized coal combustion device according to claim 6 is characterized in that it also comprises first baffle (2-3), and first baffle (2-3) is arranged on the entrance point in oil, the coal combustion organ pipe (2-2).
8. a kind of little oil ignited swirling pulverized coal combustion device according to claim 7, it is characterized in that it also comprises second baffle (2-8), second baffle (2-8) is arranged in oil between fire inspection pipe (2-5) and the auxiliary fuel pipe (2-6), the coal combustion organ pipe (2-2).
9. a kind of little oil ignited swirling pulverized coal combustion device according to claim 8 is characterized in that it also comprises fractional combustion baffle (3-2), and fractional combustion baffle (3-2) is arranged in the interior pipe (3-11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101449499A CN101187470B (en) | 2007-12-27 | 2007-12-27 | Little oil ignited swirling pulverized coal combustion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101449499A CN101187470B (en) | 2007-12-27 | 2007-12-27 | Little oil ignited swirling pulverized coal combustion device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101187470A CN101187470A (en) | 2008-05-28 |
| CN101187470B true CN101187470B (en) | 2010-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007101449499A Expired - Fee Related CN101187470B (en) | 2007-12-27 | 2007-12-27 | Little oil ignited swirling pulverized coal combustion device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112354672B (en) * | 2020-10-16 | 2022-09-20 | 内蒙古京能康巴什热电有限公司 | Control method for output of coal mill in ignition process of boiler |
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- 2007-12-27 CN CN2007101449499A patent/CN101187470B/en not_active Expired - Fee Related
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| CN101187470A (en) | 2008-05-28 |
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Granted publication date: 20100414 Termination date: 20121227 |