CN109000226B - Air-cooled burner - Google Patents
Air-cooled burner Download PDFInfo
- Publication number
- CN109000226B CN109000226B CN201811009413.0A CN201811009413A CN109000226B CN 109000226 B CN109000226 B CN 109000226B CN 201811009413 A CN201811009413 A CN 201811009413A CN 109000226 B CN109000226 B CN 109000226B
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- air
- cone
- diffusion cone
- assembly
- cylinder
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- 238000009792 diffusion process Methods 0.000 claims abstract description 122
- 239000003245 coal Substances 0.000 claims abstract description 35
- 230000035939 shock Effects 0.000 claims description 12
- 239000004071 soot Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000002817 coal dust Substances 0.000 description 4
- 238000010304 firing Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000571 coke Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention relates to an air-cooled burner, which is characterized by mainly comprising an ignition bin assembly (1), a diffusion cone assembly (2), an inner overgrate air assembly (3), an outer overgrate air assembly (4), a pulverized coal pipe assembly (5) and an overgrate air duct (6); the ignition bin assembly (1), the inner overgrate air assembly (3) and the outer overair assembly (4) are sequentially connected together from left to right to form a burner body; the diffusion cone assembly (2) and the pulverized coal pipe assembly (5) penetrate through the combustor body, and the secondary air duct (6) is arranged above the combustor body. According to the invention, through reasonable structural design, the secondary air is divided into the inner secondary air and the outer secondary air, the burner can be cooled by only relying on air, and a water circulation cooling system is not required to be arranged, so that the burner has a simpler structure, the volume is reduced by more than 50%, and the production cost is obviously reduced.
Description
Technical Field
The invention relates to a burner in the technical field of pulverized coal industrial boiler burners, in particular to an air-cooled burner for cooling the burner by using air.
Background
The burner is one of core equipment of the pulverized coal industrial boiler, pulverized coal is ignited in the burner and then blown into the hearth by combustion-supporting air to be fully combusted, so that the burner has the functions of igniting the pulverized coal and organizing the pulverized coal to be stably combusted. The coal powder is burnt vigorously in the combustor, and the temperature in the combustor can reach more than 800 ℃, so that a cooling system is required to rapidly take away the heat of the combustor, and the stable operation of the combustor is ensured. Currently, there are two main methods for reducing the burner temperature: one is to enlarge the volume of the burner, and the other is to arrange a water circulation cooling system outside the burner. However, these two methods have the following drawbacks, respectively: (1) The enlarged burner has the disadvantages of material waste, difficult ignition and unstable flame. (2) The arrangement of the water circulation cooling system outside the burner not only causes the structure of the burner to be complicated, but also makes it difficult to arrange the water circulation cooling system for the burner of some structures. Therefore, it is necessary to develop a burner with small volume, rapid ignition, stable flame and simple cooling system structure.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide an air-cooled burner which can not only stably burn pulverized coal with a small volume, but also cool the burner by using only air without an external water circulation cooling system by reasonable structural design.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the air-cooled burner is characterized by mainly comprising an ignition bin assembly (1), a diffusion cone assembly (2), an inner overgrate air assembly (3), an outer overgrate air assembly (4), a pulverized coal pipe assembly (5) and an overgrate air duct (6); the ignition bin assembly (1), the inner overgrate air assembly (3) and the outer overair assembly (4) are sequentially connected together from left to right to form a burner body; the diffusion cone assembly (2) and the pulverized coal pipe assembly (5) penetrate through the combustor body, and the secondary air duct (6) is arranged above the combustor body;
the ignition bin assembly (1) mainly comprises an ignition bin flange (11), an igniter (12), an ignition oil gun (13), a shock wave soot blower (14), a wind shielding ring (15) and an ignition bin blade assembly (16); the igniter (12), the ignition oil gun (13) and the shock wave soot blower (14) are respectively arranged on the ignition bin flange (11) through an interface seat, and the other end of the interface seat penetrates through the ignition bin flange (11) and stretches into the combustor body; the wind shielding ring (15) is arranged on the inner side of the ignition bin flange (11), and the ignition bin blade assembly (16) is connected with the wind shielding ring (15);
the diffusion cone assembly (2) mainly comprises a diffusion cone front flange (21), a diffusion cone inner wall (22), a diffusion cone outer wall (23), diffusion cone blades (24) and a diffusion cone rear flange (25); the middle of the diffusion cone front flange (21) is provided with a hole, and the inner wall (22) of the diffusion cone is fixed on the diffusion cone front flange (21); the left end of the diffusion cone inner wall (22) is connected with the ignition bin blade assembly (16), and a plurality of diffusion cone blades (24) are circumferentially arranged on the periphery of the right end of the diffusion cone inner wall (22); the middle of the diffusion cone rear flange (25) is provided with a hole, the left end of the diffusion cone outer wall (23) is connected with the diffusion cone rear flange (25), and the inner side of the right end is connected with the outer side of the diffusion cone blades (24);
the inner overgrate air assembly (3) mainly comprises an inner overgrate air small air cylinder (31), an inner overgrate air large air cylinder (32), an inner overgrate air valve (33) and a diversion cone (34); the upper end of the secondary air cylinder (6) is provided with an air inlet, the lower end of the secondary air cylinder is provided with two air outlets, and one air outlet is connected with the upper end of the inner secondary air small cylinder (31) through the inner secondary air valve (33); the left end of the inner secondary air main air cylinder (32) is fixed on the ignition bin flange (11), and the right end is fixed on the diffusion cone flange (21); the lower end of the inner secondary air small air cylinder (31) is connected with the inner secondary air large air cylinder (32), and the diversion cone (34) is fixed at the connecting position of the inner secondary air small air cylinder (31) and the inner secondary air large air cylinder (32) which are positioned at the outer side;
the outer overgrate air assembly (4) mainly comprises an outer overair outer cylinder (41), an outer overair inner cylinder (42), an outer overair small air cylinder (43) and an outer overair valve (44); the left ends of the outer secondary air outer cylinder (41) and the outer secondary air inner cylinder (42) are fixed on the diffusion cone front flange (21), and the right ends are fixed on the diffusion cone rear flange (25); the upper end of the small outer secondary air cylinder (43) is connected with the other air outlet of the secondary air cylinder (6) through the outer secondary air valve (44), and the lower end of the small outer secondary air cylinder (43) penetrates through the outer secondary air outer cylinder (41) and then is connected with the outer secondary air inner cylinder (42).
In a preferred embodiment, the pulverized coal pipe assembly (5) mainly consists of an interface flange (51), a pulverized coal pipe (52) and a reflecting bowl (53); the pulverized coal pipe (52) is fixed on the ignition bin flange (11), the left end of the pulverized coal pipe (52) is connected with the interface flange (51), and the right end of the pulverized coal pipe is connected with the reflecting bowl (53).
In a preferred embodiment, the firing cartridge vane assembly (16) consists essentially of a vane inner barrel (161), a vane outer barrel (162) and axial vanes (163); the left end of the vane inner cylinder (161) is connected with the wind shielding ring (15), the right end of the vane outer cylinder (162) is connected with the inner wall (22) of the diffusion cone, and the axial vanes (163) are welded between the vane inner cylinder (161) and the vane outer cylinder (162) at intervals along the axial direction; the number of the axial blades (163) is 18, the axial blades are uniformly distributed along the circumferential direction, and the angle between two adjacent axial blades (163) is 20 degrees.
In a preferred embodiment, the firing cartridge vane assembly (16) consists essentially of a vane left ring plate (164), a vane right ring plate (165), and radial vanes (166); the inner ring of the left blade ring plate (164) is connected with the wind shielding ring (15), the outer ring of the right blade ring plate (165) is connected with the inner wall (22) of the diffusion cone, and the radial blades (166) are welded between the left blade ring plate (164) and the right blade ring plate (165) at intervals along the radial direction; the number of the radial blades (166) is 18, the radial blades are uniformly distributed along the circumferential direction, and the angle between two adjacent radial blades (166) is 20 degrees.
In a preferred embodiment, an insulating layer (7) is poured in a space formed by the outer overgrate air outer cylinder (41), the outer overgrate air inner cylinder (42), the diffusion cone front flange (21), the diffusion cone rear flange (25) and the outer overgrate air small air cylinder (43).
In a preferred embodiment, the inner diffusion cone wall (22) and the outer diffusion cone wall (23) are formed by combining a first cone gradually expanding from left to right and a second cone gradually shrinking from right to left, and the length of the first cone is larger than that of the second cone; meanwhile, the second cone length of the diffusion cone inner wall (22) is the same as the second cone length of the diffusion cone outer wall (23), and the first cone length of the diffusion cone inner wall (22) is larger than the first cone length of the diffusion cone outer wall (23).
In a preferred embodiment, the number of the diffusion cone blades (23) is 12, and the diffusion cone blades are uniformly distributed between the second cone cylinder of the diffusion cone inner wall (22) and the diffusion cone outer wall (23) along the circumferential direction.
In a preferred embodiment, the shock soot blower (14) is mounted on the lowermost interface mount and the extension of the shock soot blower (14) outlet is aligned with the first cone and second cone connection locations of the diffusion cone inner wall (22).
In a preferred embodiment, a camera (17), a flame detector (18) and a fire observation hole (19) are also arranged on the ignition chamber flange (11).
In a preferred embodiment, a plurality of wind holes are uniformly opened in the circumferential direction of the wind shielding ring (15).
Due to the adoption of the technical scheme, the invention has the following advantages: 1. the secondary air is divided into the inner secondary air and the outer secondary air, the burner can be cooled by only relying on air, and a water circulation cooling system is not required to be arranged, so that the burner has a simpler structure, the volume is reduced by more than 50%, and the production cost is obviously reduced. 2. The invention can adjust the flow field and the temperature field in the air-cooled burner by modifying the structure and the size of the related parts, thereby improving the capability of the air-cooled burner for adapting to different working conditions.
Drawings
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
FIG. 2 is a schematic diagram of the main component parts of embodiment 1 of the present invention;
FIG. 3 is a schematic view of the arrangement of the apparatus on the fire box flange of the present invention;
FIG. 4 is a schematic view of the structure and internal flow field of the air-cooled burner according to embodiment 1 of the present invention;
fig. 5 is a schematic view of the structure and internal flow field of the air-cooled burner according to embodiment 2 of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples. It is to be understood, however, that the drawings are designed solely for the purposes of providing a better understanding of the invention and are not to be construed as limiting the invention.
As shown in fig. 1, the air-cooled burner provided by the invention mainly comprises an ignition bin assembly 1, a diffusion cone assembly 2, an inner overgrate air assembly 3, an outer overgrate air assembly 4, a pulverized coal pipe assembly 5 and an overgrate air duct 6. The ignition bin assembly 1, the inner overgrate air assembly 3 and the outer overgrate air assembly 4 are sequentially connected together from left to right to form a burner body. The diffusion cone assembly 2 and the pulverized coal pipe assembly 5 penetrate through the combustor body, and the secondary air duct 6 is arranged above the combustor body.
As shown in fig. 2 and 3, the ignition bin assembly 1 mainly comprises an ignition bin flange 11, an igniter 12, an ignition oil gun 13, a shock wave soot blower 14, a wind shielding ring 15 and an ignition bin blade assembly 16. The igniter 12, the ignition oil gun 13 and the shock wave soot blower 14 are respectively arranged on the ignition bin flange 11 through the interface seat, and the other end of the interface seat penetrates through the ignition bin flange 11 and stretches into the combustor body. The wind shielding ring 15 is installed inside the ignition chamber flange 11, and the ignition chamber blade assembly 16 is connected with the wind shielding ring 15.
The diffusion cone assembly 2 mainly comprises a diffusion cone front flange 21, a diffusion cone inner wall 22, a diffusion cone outer wall 23, diffusion cone blades 24 and a diffusion cone rear flange 25. The middle of the front flange 21 of the diffusion cone is provided with a hole, and the diffusion cone 22 is fixed on the front flange 21 of the diffusion cone. The left end of the diffusion cone inner wall 22 is connected with the ignition chamber blade assembly 16, and a plurality of diffusion cone blades 24 are circumferentially arranged on the outer periphery of the right end of the diffusion cone inner wall 22. The middle of the diffusion cone rear flange 25 is provided with a hole, the left end of the diffusion cone outer wall 23 is connected with the diffusion cone rear flange 25, and the inner side of the right end is connected with the outer side of the diffusion cone blades 24.
The inner overgrate air component 3 mainly comprises an inner overgrate air small air cylinder 31, an inner overgrate air large air cylinder 32, an inner overgrate air valve 33 and a diversion cone 34. The upper end of the secondary air cylinder 6 is provided with an air inlet, the lower end is provided with two air outlets, and one air outlet is connected with the upper end of the inner secondary air small cylinder 31 through an inner secondary air valve 33. The left end of the inner overgrate air main air duct 32 is fixed on the ignition bin flange 11, and the right end is fixed on the diffusion cone front flange 21. The lower end of the inner secondary air small air cylinder 31 is connected with the inner secondary air large air cylinder 32, and the diversion cone 34 is welded at the connecting position of the inner secondary air small air cylinder 31 and the inner secondary air large air cylinder 32 which are positioned on the outer side.
The outer overgrate air assembly 4 mainly comprises an outer overair outer cylinder 41, an outer overair inner cylinder 42, an outer overair small air cylinder 43 and an outer overair valve 44. The left ends of the outer overgrate air outer cylinder 41 and the outer overgrate air inner cylinder 42 are fixed on the front flange 21 of the diffusion cone, and the right ends are fixed on the rear flange 25 of the diffusion cone. The upper end of the outer secondary air small air cylinder 43 is connected with the other air outlet of the secondary air cylinder 6 through an outer secondary air valve 44, and the lower end of the outer secondary air small air cylinder 43 penetrates through the outer secondary air outer cylinder 41 and then is connected with the outer secondary air inner cylinder 42.
The pulverized coal pipe assembly 5 mainly comprises an interface flange 51, a pulverized coal pipe 52 and a reflecting bowl 53. The pulverized coal pipe 52 is fixed on the ignition bin flange 11, the left end of the pulverized coal pipe 52 is connected with the interface flange 51, and the right end of the pulverized coal pipe 52 is connected with the reflecting bowl 53.
As shown in fig. 4, the ignition chamber blade assembly 16 provided in embodiment 1 of the present invention is mainly composed of a blade inner cylinder 161, a blade outer cylinder 162, and axial blades 163 (the axial movement of air flowing through the blades along the air-cooled burner). The left end of the vane inner cylinder 161 is connected with the wind shielding ring 15, the right end of the vane outer cylinder 162 is connected with the inner wall 22 of the diffusion cone, and the axial vanes 163 are welded between the vane inner cylinder 161 and the vane outer cylinder 162 along the axial interval; preferably, the number of axial blades 163 is 18 and is uniformly distributed in the circumferential direction, and the angle between two adjacent axial blades 163 is 20 °.
As shown in fig. 5, the ignition chamber blade assembly 16 provided in embodiment 2 of the present invention is mainly composed of a blade left ring plate 164, a blade right ring plate 165, and radial blades 166 (the radial movement of air flowing through the blades along the air-cooled burner). The inner ring of the left blade ring plate 164 is connected with the wind shielding ring 15, the outer ring of the right blade ring plate 165 is connected with the inner wall 22 of the diffusion cone, and radial blades 166 are welded between the left blade ring plate 164 and the right blade ring plate 165 at intervals along the radial direction; preferably, the number of radial blades 166 is also 18 and evenly distributed circumferentially, with the angle between two adjacent radial blades 166 being 20.
In a preferred embodiment, as shown in fig. 2, the heat insulation layer 7 is poured in the space formed by the outer overgrate air outer cylinder 41, the outer overgrate air inner cylinder 42, the diffusion cone front flange 21, the diffusion cone rear flange 25 and the outer overgrate air small air cylinder 43, so that heat loss is reduced while the air-cooled burner equipment is prevented from being burnt out at high temperature, and the heat efficiency of the air-cooled burner is improved.
In a preferred embodiment, the diffusion cone inner wall 22 and the diffusion cone outer wall 23 are each formed by combining a first cone gradually expanding from left to right and a second cone gradually converging from right to left, and the length of the first cone is greater than that of the second cone; meanwhile, the diffusion cone inner wall 22 has the same length as the diffusion cone outer wall 23 in comparison with the two second cones, but the first cone length of the diffusion cone inner wall 22 is larger than the first cone length of the diffusion cone outer wall 23.
In a preferred embodiment, the number of diffusion cone blades 23 is 12 and is uniformly distributed between the diffusion cone inner wall 22 and the second cone of the diffusion cone outer wall 23 in the circumferential direction.
In a preferred embodiment, the shock gun 14 is mounted on the lowermost interface mount and the extension of the shock gun 14 outlet is aligned with the location of coking when the air cooled burner is in operation, as the lowermost end of the diffusion cone inner wall 22 where the first cone and second cones are joined (i.e., where the first cone diameter is greatest) may coke.
In a preferred embodiment, as shown in fig. 3, the ignition chamber flange 11 is further provided with a camera 17, a flame detector 18 and a fire observation hole 19 for observing the combustion condition of the flame inside the air-cooled burner.
As shown in fig. 4, when the ignition chamber vane assembly adopts the axial vane assembly, the air-cooled burner operates as follows:
the ignition oil gun sprays diesel oil into the inner space surrounded by the inner wall of the diffusion cone, and the igniter ignites the diesel oil. The pulverized coal pipe is connected with a pulverized coal supply device at the upstream of the air-cooled burner through the interface flange, primary air carries pulverized coal to enter the air-cooled burner from the pulverized coal pipe, the primary air is reflected by the reflecting bowl and then enters a space surrounded by the inner wall of the diffusion cone, and the burned diesel ignites the pulverized coal.
The secondary air enters the air-cooled burner from the secondary air cylinder, is split into an inner secondary air component and an outer secondary air component, and the air quantity entering the inner secondary air component and the outer secondary air component is controlled by an inner secondary air valve and an outer secondary air valve respectively. Part of the secondary air (namely, inner secondary air) enters the inner secondary air big wind barrel through the inner secondary air small wind barrel, bypasses the flow guide cone and the wind shielding ring, and enters a space surrounded by the inner wall of the diffusion cone through the axial blade assembly to blow the burnt coal dust into the hearth. The axial blades are irregularly curved surfaces for adjusting the outlet direction of the inner secondary air. Most of the secondary air entering the inner secondary air main wind cylinder enters the inner wall of the diffusion cone through the axial blade assembly, a plurality of air holes are uniformly formed in the circumferential direction of the wind shielding ring in order to prevent coal dust from accumulating in the space surrounded by the wind shielding ring, and part of the secondary air enters the inner wall of the diffusion cone through the air holes on the wind shielding ring.
The other part of the secondary air (namely, the outer secondary air) enters the space between the outer secondary air inner cylinder and the inner wall of the diffusion cone through the small outer secondary air cylinder, flows along the outer side of the inner wall of the diffusion cone, passes through the diffusion cone blades between the inner wall of the diffusion cone and the outer wall of the diffusion cone and then enters the hearth. The diffusion cone blades are irregularly curved surfaces and are used for adjusting the outlet direction of the outer secondary air. The inner secondary air and the outer secondary air are mixed in the hearth, and the outer secondary air helps to blow the coal dust burnt in the air-cooled burner into the hearth while playing a role in cooling.
As shown in fig. 5, when the firing cartridge vane assembly employs a radial vane assembly, the main differences from employing an axial vane assembly are: after the inner secondary air flows through the guide cone, most of the inner secondary air radially enters the space surrounded by the inner wall of the diffusion cone through the radial blade assembly, and part of the inner secondary air passes through the air holes on the wind shielding ring to enter the space surrounded by the inner wall of the diffusion cone, and the inner secondary air blows the burnt coal dust into the hearth and is mixed with the outer secondary air, and finally enters the hearth for combustion. In the two embodiments shown in fig. 4 and 5, the flow field and the temperature field inside the air-cooled burner can be changed by adjusting the structure and the size of related components, so that the operation condition of the air-cooled burner can be improved according to the actual working condition.
The foregoing embodiments are only for illustrating the present invention, wherein the structures, connection modes, manufacturing processes, etc. of the components may be changed, and all equivalent changes and modifications performed on the basis of the technical solutions of the present invention should not be excluded from the protection scope of the present invention.
Claims (7)
1. The air-cooled burner is characterized by mainly comprising an ignition bin assembly (1), a diffusion cone assembly (2), an inner overgrate air assembly (3), an outer overgrate air assembly (4), a pulverized coal pipe assembly (5) and an overgrate air duct (6); the ignition bin assembly (1), the inner overgrate air assembly (3) and the outer overair assembly (4) are sequentially connected together from left to right to form a burner body; the diffusion cone assembly (2) and the pulverized coal pipe assembly (5) penetrate through the combustor body, and the secondary air duct (6) is arranged above the combustor body;
the ignition bin assembly (1) mainly comprises an ignition bin flange (11), an igniter (12), an ignition oil gun (13), a shock wave soot blower (14), a wind shielding ring (15) and an ignition bin blade assembly (16); the igniter (12), the ignition oil gun (13) and the shock wave soot blower (14) are respectively arranged on the ignition bin flange (11) through an interface seat, and the other end of the interface seat penetrates through the ignition bin flange (11) and stretches into the combustor body; the wind shielding ring (15) is arranged on the inner side of the ignition bin flange (11), and the ignition bin blade assembly (16) is connected with the wind shielding ring (15);
the diffusion cone assembly (2) mainly comprises a diffusion cone front flange (21), a diffusion cone inner wall (22), a diffusion cone outer wall (23), diffusion cone blades (24) and a diffusion cone rear flange (25); the middle of the diffusion cone front flange (21) is provided with a hole, and the inner wall (22) of the diffusion cone is fixed on the diffusion cone front flange (21); the left end of the diffusion cone inner wall (22) is connected with the ignition bin blade assembly (16), and a plurality of diffusion cone blades (24) are circumferentially arranged on the periphery of the right end of the diffusion cone inner wall (22); the middle of the diffusion cone rear flange (25) is provided with a hole, the left end of the diffusion cone outer wall (23) is connected with the diffusion cone rear flange (25), and the inner side of the right end is connected with the outer side of the diffusion cone blades (24);
the inner overgrate air assembly (3) mainly comprises an inner overgrate air small air cylinder (31), an inner overgrate air large air cylinder (32), an inner overgrate air valve (33) and a diversion cone (34); the upper end of the secondary air cylinder (6) is provided with an air inlet, the lower end of the secondary air cylinder is provided with two air outlets, and one air outlet is connected with the upper end of the small inner secondary air cylinder (31) through the inner secondary air valve (33); the left end of the inner secondary air main air duct (32) is fixed on the ignition bin flange (11), and the right end is fixed on the diffusion cone front flange (21); the lower end of the inner secondary air small air cylinder (31) is connected with the inner secondary air large air cylinder (32), and the diversion cone (34) is fixed at the connecting position of the inner secondary air small air cylinder (31) and the inner secondary air large air cylinder (32) which are positioned at the outer side;
the outer overgrate air assembly (4) mainly comprises an outer overair outer cylinder (41), an outer overair inner cylinder (42), an outer overair small air cylinder (43) and an outer overair valve (44); the left ends of the outer secondary air outer cylinder (41) and the outer secondary air inner cylinder (42) are fixed on the diffusion cone front flange (21), and the right ends are fixed on the diffusion cone rear flange (25); the upper end of the small outer secondary air cylinder (43) is connected with the other air outlet of the secondary air cylinder (6) through the outer secondary air valve (44), and the lower end of the small outer secondary air cylinder (43) penetrates through the outer secondary air outer cylinder (41) and then is connected with the outer secondary air inner cylinder (42);
the diffusion cone inner wall (22) and the diffusion cone outer wall (23) are formed by combining a first cone which is gradually expanded from left to right and a second cone which is gradually expanded from right to left, and the length of the first cone is longer than that of the second cone; meanwhile, the second cone length of the inner diffusion cone wall (22) is the same as the second cone length of the outer diffusion cone wall (23), and the first cone length of the inner diffusion cone wall (22) is larger than the first cone length of the outer diffusion cone wall (23);
the number of the diffusion cone blades (24) is 12, and the diffusion cone blades are uniformly distributed between the second cone barrel of the diffusion cone inner wall (22) and the diffusion cone outer wall (23) along the circumferential direction;
the shock wave soot blower (14) is mounted on the lowest interface seat, and an extension line of an outlet of the shock wave soot blower (14) is aligned with a connection position of a first cone and a second cone of the inner wall (22) of the diffusion cone.
2. An air-cooled burner as claimed in claim 1, wherein said pulverized coal pipe assembly (5) consists essentially of an interface flange (51), pulverized coal pipes (52) and a reflecting bowl (53); the pulverized coal pipe (52) is fixed on the ignition bin flange (11), the left end of the pulverized coal pipe (52) is connected with the interface flange (51), and the right end of the pulverized coal pipe is connected with the reflecting bowl (53).
3. An air-cooled burner as claimed in claim 1, wherein said ignition chamber vane assembly (16) consists essentially of a vane inner cylinder (161), a vane outer cylinder (162) and axial vanes (163); the left end of the vane inner cylinder (161) is connected with the wind shielding ring (15), the right end of the vane outer cylinder (162) is connected with the inner wall (22) of the diffusion cone, and the axial vanes (163) are welded between the vane inner cylinder (161) and the vane outer cylinder (162) at intervals along the axial direction; the number of the axial blades (163) is 18, the axial blades are uniformly distributed along the circumferential direction, and the angle between two adjacent axial blades (163) is 20 degrees.
4. An air-cooled burner as claimed in claim 1, wherein said ignition cartridge vane assembly (16) consists essentially of a vane left ring plate (164), a vane right ring plate (165) and radial vanes (166); the inner ring of the left blade ring plate (164) is connected with the wind shielding ring (15), the outer ring of the right blade ring plate (165) is connected with the inner wall (22) of the diffusion cone, and the radial blades (166) are welded between the left blade ring plate (164) and the right blade ring plate (165) at intervals along the radial direction; the number of the radial blades (166) is 18, the radial blades are uniformly distributed along the circumferential direction, and the angle between two adjacent radial blades (166) is 20 degrees.
5. An air-cooled burner as claimed in any one of claims 1 to 4, wherein an insulating layer (7) is cast in the space formed by the outer overgrate air outer cylinder (41), the outer overgrate air inner cylinder (42), the front diffusion cone flange (21), the rear diffusion cone flange (25) and the outer overgrate air small air cylinder (43).
6. An air-cooled burner as claimed in any one of claims 1 to 4, wherein said ignition chamber flange (11) is further provided with a camera (17), a flame detector (18) and a fire observation hole (19).
7. An air-cooled burner as claimed in any one of claims 1 to 4, wherein a plurality of air holes are uniformly formed in a circumferential direction of said wind shielding ring (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811009413.0A CN109000226B (en) | 2018-08-31 | 2018-08-31 | Air-cooled burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811009413.0A CN109000226B (en) | 2018-08-31 | 2018-08-31 | Air-cooled burner |
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| Publication Number | Publication Date |
|---|---|
| CN109000226A CN109000226A (en) | 2018-12-14 |
| CN109000226B true CN109000226B (en) | 2023-12-29 |
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| CN201811009413.0A Active CN109000226B (en) | 2018-08-31 | 2018-08-31 | Air-cooled burner |
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| CN111237757A (en) * | 2020-01-22 | 2020-06-05 | 北京纪祥节能科技有限公司 | Double-cone rotational flow premixing burner |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101093077A (en) * | 2007-05-25 | 2007-12-26 | 清华大学 | Eddy flow powdered coal burner lit up by tiny oil |
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| CN209101271U (en) * | 2018-08-31 | 2019-07-12 | 煤科院节能技术有限公司 | Air-cooled burner |
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| JP4629945B2 (en) * | 1999-12-15 | 2011-02-09 | 大阪瓦斯株式会社 | Fluid distributor and burner device, gas turbine engine and cogeneration system |
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| CN101103227A (en) * | 2004-11-17 | 2008-01-09 | 韦巴斯托股份公司 | Burner for motor vehicle heater has heat shield with apertures having air guide elements to take secondary air into combustion chamber |
| CN101093077A (en) * | 2007-05-25 | 2007-12-26 | 清华大学 | Eddy flow powdered coal burner lit up by tiny oil |
| CN103791494A (en) * | 2014-01-22 | 2014-05-14 | 煤炭科学研究总院 | Air-cooled pulverized coal low-nitrogen combustor and application method thereof |
| CN104154533A (en) * | 2014-08-26 | 2014-11-19 | 山西蓝天环保设备有限公司 | Reverse flow pre-mixing type pulverized coal low-nitrogen combustor and combustion method thereof |
| CN106196042A (en) * | 2016-08-29 | 2016-12-07 | 煤科院节能技术有限公司 | A kind of strong swirl jet burner |
| CN206094062U (en) * | 2016-08-29 | 2017-04-12 | 煤科院节能技术有限公司 | Strong efflux combustor that revolves |
| CN206145669U (en) * | 2016-09-28 | 2017-05-03 | 北京盛恒鑫业能源科技有限公司 | Swirling flow pulverized coal burner |
| CN209101271U (en) * | 2018-08-31 | 2019-07-12 | 煤科院节能技术有限公司 | Air-cooled burner |
Also Published As
| Publication number | Publication date |
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| CN109000226A (en) | 2018-12-14 |
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