CN114963168A - Clean coal high-efficient burner - Google Patents
Clean coal high-efficient burner Download PDFInfo
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- CN114963168A CN114963168A CN202210737521.XA CN202210737521A CN114963168A CN 114963168 A CN114963168 A CN 114963168A CN 202210737521 A CN202210737521 A CN 202210737521A CN 114963168 A CN114963168 A CN 114963168A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
- F23C5/08—Disposition of burners
- F23C5/10—Disposition of burners to obtain a flame ring
- F23C5/12—Disposition of burners to obtain a flame ring for pulverulent fuel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model belongs to the technical field of the pulverized coal combustion technique and specifically relates to a clean high-efficient burner of coal is related to, it includes furnace body and combustor body, the combustor body set up in the furnace body inside wall, the burning chamber has been seted up to the combustor body, still seted up on the combustor body with flame jet and the air outlet of giving first time of burning that the chamber is linked together, the air outlet of giving first time with the flame jet sets up relatively, the fixed branch stream block that is used for equalling divide the wind into the stranded that is provided with in the burning chamber, a plurality of reposition of redundant personnel passageways have been seted up on the branch stream block, divide each of stream block a plurality of overgrate air outlets have been seted up to reposition of redundant personnel passageway lateral wall. The application has the effect of accelerating the ignition speed of the clean coal powder in the combustor.
Description
Technical Field
The application relates to the technical field of pulverized coal combustion, in particular to a clean coal efficient combustion device.
Background
The clean coal is a coal product which is formed by adding additives such as bonding, combustion supporting, sulfur fixing, water proofing and the like into the low-sulfur low-volatility smokeless coal powder which is prepared and selected through a mechanical method, the clean coal can be naturally cured without being dried, and the clean coal is not broken, pollution-free, smoke-free, tasteless and dust-free in combustion after being packaged, so that clean emission of different stoves can be realized, and the clean coal is widely concerned in the future.
However, the volatile content of clean coal is usually less than twelve percent and lower than that of normal coal, which makes it more difficult for clean coal to reach an ignition point in a burner, and when clean coal powder is sprayed out along with primary air, the clean coal powder is difficult to ignite and is easy to cause too late combustion, so that the clean coal in a combustion area is difficult to burn out, and energy waste is caused.
Disclosure of Invention
In order to accelerate the ignition speed of clean coal powder in a combustor, the application provides a clean coal high-efficiency combustion device.
The application provides a clean high-efficient burner of coal adopts following technical scheme:
the utility model provides a clean high-efficient burner of coal, includes furnace body and combustor body, the combustor body set up in the furnace body inside wall, the burning chamber has been seted up to the combustor body, still seted up on the combustor body with flame jet and the air outlet of giving first time that the burning chamber is linked together, the air outlet of giving first time with the flame jet sets up relatively, the fixed branch stream block that is used for equalling divide into the stranded with a wind that is provided with in the burning chamber, set up a plurality of reposition of redundant personnel passageways on the branch stream block, divide each of stream block a plurality of overgrate air outlets have been seted up to reposition of redundant personnel passageway lateral wall.
By adopting the above technical scheme, the pulverized coal burning is carried out through the combustor body intensification in the furnace body, and this internal air outlet that sets gradually of combustor, burning chamber and flame jet, the air that once has clean coal buggy jets out the back from the air outlet of once, through burning chamber and in the burning intracavity the burning of catching fire, because be provided with the reposition of redundant personnel piece in the burning chamber, the air that once will have the buggy reposition of redundant personnel is the tiny tributary of stranded, and be provided with a plurality of overgrate air outlets on the reposition of redundant personnel passageway lateral wall on the reposition of redundant personnel piece, provide independent overgrate air convection to each tributary in the reposition of redundant personnel passageway, in order to increase the turbulent flow of the air in each reposition of redundant personnel thigh, thereby the turbulent degree of relative holistic air current, improve the convection action of high temperature flue gas, the buggy in the realization air catches fire fast.
Optionally, the flow dividing channels of the flow dividing blocks are circumferentially and equidistantly arranged around the primary air initial conveying direction, the specifications of the flow dividing channels are the same, and the flow dividing channels are arranged along the cross-sectional area from the primary air outlet to the flame jet port in the moving direction, which is sequentially increased and then sequentially decreased.
By adopting the technical scheme, the specifications of the branch passages are the same, so that the uniformity of the branched primary air branches is controlled and improved, and the stability of each branch of primary air branches during later-stage confluence is controlled; the cross-sectional area of the flow dividing channel along the moving direction from the primary air outlet to the flame jet orifice is sequentially increased and then sequentially reduced, so that the flow speed is reduced when the primary air is divided into the maximum cross-sectional areas of the flow dividing channel, the time for arranging the primary air in the flow dividing channel is increased, the convection time is prolonged, and the ignition speed of pulverized coal is increased.
Optionally, the reposition of redundant personnel passageway is the arc setting, one section lateral wall that the reposition of redundant personnel passageway volume is circular-arc setting, the arc lateral wall of reposition of redundant personnel passageway with the contained angle that forms between the circular arc lateral wall of the biggest section of reposition of redundant personnel passageway volume is greater than zero degree and the setting of ninety degrees less than or equal to.
Through adopting above-mentioned technical scheme, the kinetic energy loss that causes because of changing the flow direction of the reducible primary air of reposition of redundant personnel passageway that the arc set up reduces its energy consumption, and will reposition of redundant personnel passageway in the biggest section lateral wall of volume be the circular-arc setting of annular, and be the acute angle setting between the lateral wall of same looks neighbour for the primary air that passes through forms the buffer zone in this corner, with the convection current space that increases in this department, forms stable convection current, with the ignition speed that improves the buggy.
Optionally, the primary air outlet is the chamfer setting, just the outside of primary air outlet is provided with annular guide plate, annular guide plate orientation one side of primary air outlet is the parabola setting, annular guide plate deviates from one side of primary air outlet also is the parabola setting, and the crossing angle of the throwing point extension line of two parabolas is greater than zero degree and is less than ninety degrees setting, annular guide plate with the lateral wall formation initial convection zone of combustion chamber.
Through adopting above-mentioned technical scheme, be the reducible air-out velocity of flow of the primary air outlet that the chamfer set up, the annular guide plate that sets up is used for leading primary air direct current, and one side that annular guide plate deviates from the primary air outlet forms convection current district with combustion chamber lateral wall, makes the secondary air or the convection current that flow along the parabola of convection current district can hold primary air to guarantee that the buggy in the primary air is not scattered, and provide the amount of wind for stably getting into the reposition of redundant personnel passageway.
Optionally, the overgrate air outlet includes overgrate air outlet, well overgrate air outlet and overgrate air outlet down, go up the overgrate air outlet set up in divide the stream block with between the overgrate air outlet the lateral wall in combustion chamber, just go up the overgrate air outlet orientation annular guide plate deviates from the parabola entry end of primary air intake one side.
By adopting the technical scheme, the secondary air outlet is multi-stage air regulation and control so as to comprehensively improve the combustion and ignition efficiency of the primary air, wherein the upper secondary air outlet is right opposite to the annular guide plate and provides a wind power source for the flow guide of the flow guide area.
Optionally, the secondary air outlets form a plurality of groups, each group of secondary air outlets are arranged along the direction of the diversion channel at equal intervals, and each group of secondary air outlets are arranged in the same direction and obliquely with the air outlet direction of the secondary air outlets, and form a tangent circle by taking the flow direction of the split primary air as the center.
Through adopting above-mentioned technical scheme, the well overgrate air outlet that sets up to the multiunit, and the multiunit along the equidistant setting of reposition of redundant personnel passageway air supply direction, increase the time of converging of the amount of secondary air and tributary primary air, make the overgrate air that lets in can be more even with the more even that tributary primary air converges, improve the homogeneity of buggy ambient temperature, the overgrate air outlet mutual injection forms the tangent circle in every group, further turbulent degree in the straight-flow channel that improves, further promote the heat convection between high temperature flue gas and the buggy.
Optionally, the lower secondary air outlet is disposed on the side wall of the combustion chamber between the flow dividing block and the flame jet, and the lower secondary air outlet is disposed laterally and aligned to one side of the primary air.
By adopting the technical scheme, the lower secondary air outlet is arranged to locally control the speed of the primary air which is output from the flow splitting block and is newly gathered, so that the speed difference of the primary air flow is generated, the primary air which is combusted after being decelerated is relatively retained at the rear, the local temperature flow is retained at the outlet end of the flow splitting block, the heat exchange of the partial flow channel in the flow splitting block is further promoted, and the ignition of pulverized coal is promoted.
Optionally, the flame jet is in a conical shape, one end of the flame jet with the largest cross-sectional area faces the splitter plate, a plurality of convection plates are arranged on the side wall of the combustion chamber and on the side wall of the combustor body at the end of the flame jet with the largest cross-sectional area, the convection plates guide the flow towards the splitter block, and the convection plates are distributed around the flame jet at equal intervals in the circumferential direction.
By adopting the technical scheme, the flame jet orifice is arranged in a conical shape to accelerate the output of primary air flow in a combustion state, and the convection plate guides part of the output primary air flow back to the shunting block so as to increase the concentration of high-temperature flue gas in the shunting block and promote the ignition of pulverized coal in the shunting channel.
Optionally, a backflow channel is disposed on one side of the convection block facing the flame jet, an inlet of the backflow channel faces the flame jet, an outlet of the backflow channel is communicated with a side wall of each of the flow dividing channels, and a flow guiding direction of each of the convection plates faces an inlet of the backflow channel.
By adopting the technical scheme, the arranged backflow channel enables the primary air flow guided by the flow-guiding plates to flow back into the flow-dividing channel, the thermal convection of the coal dust and the high-temperature flue gas in the branch channel is further heated, the combustion of the coal dust is further promoted until stable dynamic balance is formed in the combustion cavity.
Optionally, the combustor body be the ring-type distribution in furnace body inside wall, just the flame that the combustor body sprays forms the tangent circle, on the furnace body lateral wall in the other defend burning area that is provided with of combustor body, defend burning area is followed furnace body circumference distributes, just the furnace body is provided with defend burning the transversal flower column structure of personally submitting of area, the combustor body is located the petal side of flower column structure.
Through adopting above-mentioned technical scheme, defend burning the area in the inside setting of furnace body, in order to reduce to set up in the water-cooling wall of furnace body to the heat absorption in the region that is provided with the combustor body, and set up the combustion wall, and make the cross sectional shape that the furnace body was provided with defends burning the area part be the flower form, and the combustor is located the petal department of flower form structure, when the combustor body forms tangential firing post in the furnace body, drive all sides environment and form the entrainment, and the design of petal form can make in the entrainment convection current that forms, the hot gas flow velocity of flow that is located combustor body department is relatively slower, make the radiant temperature of combustor body department keep more stable relatively, in order to promote the burning of buggy.
In summary, the present application at least includes the following beneficial technical effects:
1. the primary air stream is divided into a plurality of branches by the arranged splitter block, and independent secondary air supply is carried out on the direct current of each primary air stream, so that the convection area and degree between the primary air branch and the secondary air stream are increased, and the heat convection effect is improved;
2. through the arrangement of the set backflow channel and the convection plate, part of high-temperature flue gas flow at the flame jet flows back to the shunting channel of the shunting block again so as to accelerate the combustion of pulverized coal in the shunting channel, so that the convection strength of clean pulverized coal is increased, and the ignition of the clean pulverized coal is promoted;
3. introducing secondary air into the primary air flow in a grading manner, and spraying the secondary air through the upper secondary air outlet, the middle secondary air outlet and the lower secondary air outlet to respectively play a shaping and holding effect on the primary air flow, an effect of uniformly mixing to form convection and an effect of retaining high-temperature flue gas;
4. through the annular guide plate that sets up for the buggy in the air of following the air outlet of once outputting holds in the palm and is one, prevents to scatter.
Drawings
Fig. 1 is a furnace structure distribution diagram according to an embodiment of the present application.
Fig. 2 is a schematic structural view of a burner body according to an embodiment of the present application.
Description of reference numerals:
1. a furnace body; 2. a burner body; 3. a combustion chamber; 4. a flame jet orifice; 5. a primary air outlet; 6. a shunting block; 7. a flow dividing channel; 8. a secondary air outlet; 81. an upper secondary air outlet; 82. a secondary air outlet; 83. a lower secondary air outlet; 9. an annular deflector; 10. an initial convection zone; 11. a convection plate; 12. a return channel; 13. a sanitary burning zone; 14. and a secondary air conveying chamber.
Detailed Description
The present application is described in further detail below with reference to figures 1-2.
The embodiment of the application discloses clean high-efficient burner of coal. Referring to fig. 1, a clean coal high-efficient burner includes furnace body 1 of transversal personally submitting the rectangle, the furnace body 1 outside is provided with the water-cooling wall, four side diagonals of furnace body 1 are provided with combustor body 2 respectively, the injection port of four group combustor bodies 2 is tangent circle setting, and the flame that sprays forms the fire tornado in furnace body 1, be provided with on the furnace body 1 lateral wall in combustor body 2 side and defend burning area 13, and defend burning area 13 distributes in the four inside walls of furnace body 1, defend burning area 13 is the circular arc setting, and defend burning area 13's circular arc and set up towards furnace body 1 center, make furnace body 1 be equipped with defend burning area 13 transversal personally submit flower column structure, combustor body 2 is located the petal side of flower column structure.
Through the setting, defend burning area 13 in furnace body 1 inside setting, in order to reduce the heat absorption that sets up in furnace body 1's water-cooling wall to the region that is provided with combustor body 2, and set up the combustion wall, and make furnace body 1 be provided with defend burning area 13 partial cross sectional shape and be the flower form, and the combustor is located the petal department of flower form structure, when combustor body 2 forms the tangent circle firing prop in furnace body 1, drive all sides environment and form the entrainment, and the design of petal form can make in the entrainment convection current that forms, the hot gas flow that is located combustor body 2 department flows the velocity of flow relatively slower, make the radiant temperature of combustor body 2 department keep more stable relatively, in order to promote the burning of buggy.
Referring to fig. 2, a secondary air delivery chamber 14 is arranged outside the burner body 2 to provide secondary air for the burner body 2 to support combustion, a cylindrical combustion chamber 3 is arranged in the burner body 2, a flame jet orifice 4 and a primary air outlet 5 which are communicated with the combustion chamber 3 are also arranged on the burner body 2, and the primary air outlet 5 and the flame jet orifice 4 are arranged oppositely and are positioned at two ends of a cylindrical space of the combustion chamber 3.
The primary air outlet 5 is the chamfer setting, and the fixed annular guide plate 9 that is the ring form that is provided with in the outside of primary air outlet 5, annular guide plate 9 is the parabola setting towards one side of primary air outlet 5, and the face of connecting between them sets up smoothly, annular guide plate 9 deviates from the outer loop side of primary air outlet 5 and also is the parabola setting, the crossing angle of the throwing point extension line of two parabolas is thirty degrees, annular guide plate 9 forms initial convection current district 10 with the lateral wall that is close to combustion chamber 3 of primary air outlet 5 one side.
Through the setting, be the reducible air-out velocity of flow of 5 air outlets of the primary air that the chamfer set up, the annular guide plate 9 of setting is used for leading the primary air direct current, one side that annular guide plate 9 deviates from primary air outlet 5 forms the convection current district with 3 lateral walls of combustion chamber, makes the secondary air or the convection current that flow along the parabola of convection current district can hold the primary air to guarantee that the buggy in the primary air is not scattered, and provide the amount of wind for stable entering reposition of redundant personnel passageway 7.
A shunting block 6 for equally dividing primary air into two branches is fixedly arranged in the combustion cavity 3, the shunting block 6 is cylindrical and is coaxially arranged with the combustion cavity 3, the primary air outlet 5 and the flame jet orifice 4, two shunting channels 7 which are circular arc-shaped and have the same specification are arranged on the shunting block 6 along the axial direction of the shunting block, the two shunting channels 7 are circumferentially distributed at equal intervals around the axis of the shunting block 6, the cross section of each shunting channel 7 is not intersected with the area near the axis of the shunting block 6, the cross sections of the shunting channels 7 along the flowing direction of primary air flow are sequentially increased and then sequentially reduced, wherein the cross section area of the shunting channel 7 at the middle section part is the largest, the side wall of the middle section part with the largest volume of the shunting channel 7, which faces one side of the axis of the shunting block 6, is in an arc shape, and the axis of the circular arc part is parallel to the axis of the shunting block 6, the included angle formed between the rest arc-shaped side walls of the diversion channel 7 and the arc-shaped side wall of the section with the largest volume of the diversion channel 7 is thirty degrees.
Through the arrangement, the specifications of the branch passages 7 are the same, so that the uniformity of the branched primary air branches is controlled and improved, and the stability of the branched primary air branches in the later period is controlled; the cross-sectional area of reposition of redundant personnel passageway 7 along primary wind air outlet 5 to flame jet 4 moving direction increases in proper order earlier, back reduces the setting in proper order, the velocity of flow reduces when making the primary wind branch be located the maximum department of cross-sectional area of reposition of redundant personnel passageway 7, increase the time of arranging in reposition of redundant personnel passageway 7, prolong convection time, in order to improve the ignition speed of buggy, and the kinetic energy loss that can reduce the primary wind because of changing the flow direction and cause of reposition of redundant personnel passageway 7 that is the arc setting, reduce its energy consumption, be the circular-arc setting of annular with one section lateral wall that the volume is the biggest in reposition of redundant personnel passageway 7, and be the acute angle setting between the adjacent lateral wall of same looks, make the primary wind through form the buffer in this corner, in order to increase the convection space in this department, form stable convection, in order to improve the ignition speed of buggy.
The flame jet orifice 4 is in a conical shape, one end of the flame jet orifice 4 with the largest cross-sectional area is arranged towards the splitter block 6, eight pairs of convection plates 11 are arranged on the side wall of the combustion chamber 3 and the side wall of the combustor body 2 with the largest cross-sectional area of the flame jet orifice 4 towards the splitter block 6, the convection plate 11 is in a triangular plate shape, the short side of a right angle of the convection plate is arranged towards the splitter block 6, the end face of the short side of the right angle of the convection plate 11 is in a semi-circular arc shape, the convection plate 11 guides the flow towards the center of the splitter block 6, and the convection plates 11 are distributed at equal intervals around the circumferential direction of the flame jet orifice 4.
The end of the flow distribution block 6 facing the flame jet orifice 4 is provided with a return channel 12, the return channel 12 comprises a main channel and two sub-channels with the same specification, the two sub-channels are communicated with one end of the main channel, the main channel and the flow distribution block 6 are coaxially arranged, the inlet of the main channel is right opposite to the flame jet orifice 4, the flow guide directions of the counter flow plates 11 face the inlet of the main channel, and the outlets of the two sub-channels are respectively communicated with the side wall of the flow distribution channel 7.
And a secondary air outlet 8 is arranged in the combustion cavity 3, the secondary air outlets 8 are communicated with the secondary air delivery chamber 14, and each secondary air outlet 8 comprises an upper secondary air outlet 81, a middle secondary air outlet 82 and a lower secondary air outlet 83.
Go up overgrate air outlet 81 and set up in the lateral wall of combustion chamber 3 between current divider 6 and air outlet 5 to be provided with a plurality of, and respectively go up overgrate air outlet 81 and wind 3 axis circumference equidistant distribution in combustion chamber, and respectively go up the parabola entry end that overgrate air outlet 81 deviates from air outlet 5 one side towards annular guide plate 9.
The middle secondary air outlets 82 form a plurality of groups, the secondary air outlets 82 in each group are arranged at equal intervals along the primary air flow output direction of the diversion channel 7, the air outlet direction of the secondary air outlets 82 in each group is inclined in the same direction, the split primary air flow direction is taken as the center, a tangent circle is formed on the cross section of the diversion channel 7 to form a spiral, the middle secondary air outlets 82 on the diversion block 6 are arranged in the solid part for separating the two diversion channels 7, the middle secondary air outlets are positioned in the solid part and communicated with each other to form a conveying cavity for conveying secondary air, and the conveying cavity is also communicated with the secondary air conveying chamber 14.
The lower secondary air outlet 83 is arranged on the side wall of the combustion chamber 3 between the flow dividing block 6 and the flame jet orifice 4, the lower secondary air outlet 83 is arranged laterally and aligned with one side of the primary air, the lower secondary air outlet 83 is provided with a plurality of secondary air outlets, and the secondary air outlets 83 are distributed at equal intervals in the circumferential direction around the axis of the combustion chamber 3.
Through the arrangement, the secondary air is introduced into the primary air flow in a grading mode, the secondary air output from the upper secondary air outlet 81 is guided into the primary air through the annular guide plate 9 and is gathered with the primary air, the oxygen content of the primary air is increased, and the primary air is supported; the secondary air output by the middle secondary air outlet 82 is uniformly introduced into the diversion channel 7 through the porous arrangement, is more uniformly mixed with the primary air flow, and generates more fine convection, so that the heat convection strength of the clean coal powder in the primary air is enhanced, and the ignition speed of the clean coal powder is accelerated; secondary air is sprayed from the lower secondary air outlet 83, and part of high-temperature flue gas can be retained at the end part of the shunting block 6, so that the temperature loss of the shunting block 6 is reduced, and the load of the shunting channel 7 is increased.
The air introduced by the primary air and the secondary air is hot air.
The implementation principle of the clean coal high-efficiency combustion device in the embodiment of the application is as follows: the primary air mixed with clean coal powder enters the combustion chamber 3 from the primary air outlet 5, at the moment, the primary air is mixed with secondary air entering from an upper secondary air inlet at the outlet of the primary air outlet 5 to generate entrainment, then the primary air enters the air flow block and is divided into two branches, each branch enters the flow dividing channel 7 to perform heat convection with high-temperature flue gas, the two branches are continuously converged and entrained with the secondary air entering from the upper secondary air inlet, the coal powder in the primary air branches starts to combust, then the coal powder leaves the flow dividing block 6 to move towards the flame jet orifice 4, part of the high-temperature flue gas flows to the return channel 12 of the flow dividing block 6 through the convection plate 11 during the period, the high-temperature flue gas is fed back to the branch channel to participate in heat convection, and the rest part of the high-temperature flue gas is jetted from the flame jet orifice 4 and placed in the furnace body 1.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The utility model provides a clean high-efficient burner of coal, includes furnace body (1) and combustor body (2), combustor body (2) set up in furnace body (1) inside wall, combustion chamber (3) have been seted up in combustor body (2), still seted up on combustor body (2) with flame jet (4) and once wind air outlet (5) that combustion chamber (3) are linked together, its characterized in that: the primary air outlet (5) and the flame jet orifice (4) are arranged oppositely, a flow distribution block (6) which is used for uniformly distributing primary air into a plurality of strands is fixedly arranged in the combustion cavity (3), a plurality of flow distribution channels (7) are formed in the flow distribution block (6), and a plurality of secondary air outlets (8) are formed in the side wall of each flow distribution channel (7) of the flow distribution block (6).
2. The clean coal high-efficiency combustion device according to claim 1, characterized in that: the flow dividing channels (7) of the flow dividing blocks (6) are circumferentially arranged at equal intervals around the primary air initial conveying direction, the specifications of the flow dividing channels (7) are identical, and the cross sectional areas of the flow dividing channels (7) along the moving direction from the primary air outlet (5) to the flame jet orifice (4) are sequentially increased and then sequentially decreased.
3. The clean coal high-efficiency combustion device according to claim 2, characterized in that: the flow distribution channel (7) is arc-shaped, one section of side wall with the largest volume of the flow distribution channel (7) is arc-shaped, and the arc-shaped side wall of the flow distribution channel (7) is in the same angle with the arc-shaped side wall with the largest volume of the flow distribution channel (7) which is formed between the two side walls is greater than zero and less than or equal to ninety degrees.
4. The clean coal high-efficiency combustion device according to claim 3, characterized in that: primary air outlet (5) are the chamfer setting, just the outside of primary air outlet (5) is provided with annular guide plate (9), annular guide plate (9) orientation one side of primary air outlet (5) is the parabola setting, annular guide plate (9) deviate from one side of primary air outlet (5) also is the parabola setting, and the crossing angle of the throwing point extension line of two parabolas is greater than zero degree and is less than ninety degrees setting, annular guide plate (9) with the lateral wall of combustion chamber (3) forms initial convection current district (10).
5. The clean coal high-efficiency combustion device according to claim 4, characterized in that: secondary air outlet (8) include secondary air outlet (81), well secondary air outlet (82) and secondary air outlet (83) down, go up secondary air outlet (81) set up in divide flow block (6) with between primary air outlet (5) the lateral wall in combustion chamber (3), just go up secondary air outlet (81) orientation annular guide plate (9) deviate from the parabola entry end of primary air outlet (5) one side.
6. The clean coal high-efficiency combustion device according to claim 5, characterized in that: the middle secondary air outlets (82) form a plurality of groups, each group of the middle secondary air outlets (82) are arranged along the direction of the flow dividing channel (7) at equal intervals, and each group of the middle secondary air outlets (82) are obliquely arranged in the same direction, and the air outlet direction of the split primary air outlets (82) is used as the center to form a tangent circle.
7. The clean coal high-efficiency combustion device according to claim 6, characterized in that: the lower secondary air outlet (83) is arranged on the side wall of the combustion cavity (3) between the flow dividing block (6) and the flame jet orifice (4), and the lower secondary air outlet (83) is arranged in the lateral direction and is aligned to one side of the primary air.
8. The clean coal high-efficiency combustion device according to claim 3, characterized in that: the flame jet orifice (4) is in a conical shape, one end, with the largest cross-sectional area, of the flame jet orifice (4) faces the flow distribution block (6), a plurality of convection plates (11) are arranged on the side wall of the combustion cavity (3) and the side wall of the combustor body (2) at the end, with the largest cross-sectional area, of the flame jet orifice (4), the convection plates (11) flow towards the flow distribution block (6), and the convection plates (11) are circumferentially distributed around the flame jet orifice (4) at equal intervals.
9. The clean coal high-efficiency combustion device as claimed in claim 8, wherein: one side, facing the flame jet orifice (4), of the flow dividing block (6) is provided with a backflow channel (12), an inlet of the backflow channel (12) is opposite to the flame jet orifice (4), an outlet of the backflow channel (12) is communicated with the side wall of each flow dividing channel (7), and the flow guide direction of each convection plate (11) faces the inlet of the backflow channel (12).
10. The clean coal high-efficiency combustion device according to claim 1, characterized in that: combustor body (2) be the ring-type distribute in furnace body (1) inside wall, just the flame that combustor body (2) sprayed forms tangent circle, on furnace body (1) lateral wall in combustor body (2) other is provided with defends fires area (13), defend fires area (13) and follow furnace body (1) circumference distributes, just furnace body (1) is provided with defend and fire the transversal flower column structure of personally submitting of area (13), combustor body (2) are located the petal side of flower column structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210737521.XA CN114963168B (en) | 2022-06-27 | 2022-06-27 | Clean coal high-efficient burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210737521.XA CN114963168B (en) | 2022-06-27 | 2022-06-27 | Clean coal high-efficient burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114963168A true CN114963168A (en) | 2022-08-30 |
| CN114963168B CN114963168B (en) | 2022-11-29 |
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| CN202210737521.XA Active CN114963168B (en) | 2022-06-27 | 2022-06-27 | Clean coal high-efficient burner |
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| CN1266158A (en) * | 1999-03-03 | 2000-09-13 | 株式会社日立制作所 | Powdered coal burner and combustion apparatus |
| WO2004025178A1 (en) * | 2002-09-06 | 2004-03-25 | Webasto Ag | Burner, particularly venturi burner, comprising a combustion chamber pipe |
| JP2004093073A (en) * | 2002-09-03 | 2004-03-25 | Sumitomo Metal Ind Ltd | Powder combustion device and powder combustion method |
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| CN101324334A (en) * | 2008-07-28 | 2008-12-17 | 上海题桥纺织染纱有限公司 | Low NOx liquid state slag-off double-eddy flow coal-powder combustor |
| CN104566357A (en) * | 2013-10-29 | 2015-04-29 | 烟台龙源电力技术股份有限公司 | Pulverized coal burner and boiler |
| CN109323250A (en) * | 2017-07-31 | 2019-02-12 | 通用电气技术有限公司 | Coal nozzle assembly |
| JP2020106170A (en) * | 2018-12-26 | 2020-07-09 | 三菱日立パワーシステムズ株式会社 | Combustion burner, boiler, and combustion burner assembling method |
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2022
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1266158A (en) * | 1999-03-03 | 2000-09-13 | 株式会社日立制作所 | Powdered coal burner and combustion apparatus |
| JP2004093073A (en) * | 2002-09-03 | 2004-03-25 | Sumitomo Metal Ind Ltd | Powder combustion device and powder combustion method |
| WO2004025178A1 (en) * | 2002-09-06 | 2004-03-25 | Webasto Ag | Burner, particularly venturi burner, comprising a combustion chamber pipe |
| CN1959205A (en) * | 2006-11-30 | 2007-05-09 | 上海交通大学 | Combustion method of anthracite coal |
| CN101324334A (en) * | 2008-07-28 | 2008-12-17 | 上海题桥纺织染纱有限公司 | Low NOx liquid state slag-off double-eddy flow coal-powder combustor |
| CN104566357A (en) * | 2013-10-29 | 2015-04-29 | 烟台龙源电力技术股份有限公司 | Pulverized coal burner and boiler |
| CN109323250A (en) * | 2017-07-31 | 2019-02-12 | 通用电气技术有限公司 | Coal nozzle assembly |
| JP2020106170A (en) * | 2018-12-26 | 2020-07-09 | 三菱日立パワーシステムズ株式会社 | Combustion burner, boiler, and combustion burner assembling method |
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| CN114963168B (en) | 2022-11-29 |
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