CN214223088U - Novel coal feeding device of circulating fluidized bed boiler - Google Patents
Novel coal feeding device of circulating fluidized bed boiler Download PDFInfo
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- CN214223088U CN214223088U CN202022602447.XU CN202022602447U CN214223088U CN 214223088 U CN214223088 U CN 214223088U CN 202022602447 U CN202022602447 U CN 202022602447U CN 214223088 U CN214223088 U CN 214223088U
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Abstract
The utility model discloses a novel circulating fluidized bed boiler coal feeding device, the coal breakage pipe chute that sets up including the slope, coal breakage pipe chute bottom is connected with the coal feeding device head, coal feeding device head lateral wall extends to the water-cooled wall, coal feeding device head forms rectangular shape coal air passageway as broadcasting wind gap three, broadcast wind gap three and three intercommunications of broadcast coal tuber pipe, broadcast coal tuber pipe three sets up the coal breakage pipe chute lower part. This coal feeding device can avoid piling up the buggy and causing the problem of jam, reduces the impact of coal to the steel sheet of coal feeding device bottom at the in-process of carrying the whereabouts, avoids its mill to wear to leak the coal and blowing out, effectively prevents that the buggy from scouring away the bottom plate, has also guaranteed the homogeneity behind the scattered fuel entering furnace simultaneously, can prevent that the furnace flue gas from anti-scurrying and burning out the belt feeder.
Description
Technical Field
The utility model relates to a circulating fluidized bed boiler coal feeding device technical field, concretely relates to novel coal feeding device to what 15MW ~ 200MW rank circulating fluidized bed boiler designed.
Background
The circulating fluidized bed boiler has the advantages of wide fuel adaptability, high-efficiency heat efficiency, less pollutant emission and the like, and is suitable for the national conditions of which the pollutant emission requirements are stricter in recent years in China, so that the circulating fluidized bed boiler is vigorously developed and widely applied. The coal feeder is one of the important parts of the circulating fluidized bed boiler, and the main function of the coal feeder is to feed coal in a coal hopper into a hearth for combustion, so that the full supply of fuel and the heat load of the boiler are ensured, and the heat efficiency of the boiler is greatly influenced.
Therefore, the coal feeding device of the circulating fluidized bed boiler has the advantages that the running reliability must be guaranteed, the boiler is not stopped due to coal blockage caused by unsmooth fuel conveying, the belt coal feeder can be effectively prevented from being burnt out due to reverse channeling of the flue gas of the hearth, and the coal feeding device cannot be worn through by a steel plate to leak coal due to the abrasive property of the coal. In actual operation projects, the problems occur to different degrees, and therefore, the optimal design of the coal feeding device is urgent.
In addition, the coal feeding device of the circulating fluidized bed boiler is inevitably intersected with the vertical pipe section and the inclined pipe section due to the structural form of the coal feeding device, coal vertically falls from an outlet of the coal feeder, finally enters a hearth through the inclined pipe section for combustion, coal powder at the intersection of the vertical section and the inclined section can scour metal at the bottom of the inclined pipe section, a bottom plate is finally worn after the boiler operates for a period of time, the service life of the coal feeding device is seriously influenced, and the continuous operation capacity of the boiler is greatly limited.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem be: the utility model provides a novel circulating fluidized bed boiler coal feeding device, this coal feeding device can avoid causing the problem of jam piling up the buggy, reduces the coal and to the impact of coal feeding device bottom steel sheet at the in-process of carrying the whereabouts, avoids its mill to wear to leak the coal and blowing out, prevents effectively that the buggy from scouring away the bottom plate, has also guaranteed the homogeneity after scattering fuel gets into furnace simultaneously, can prevent that furnace flue gas from anti-scurrying and burning out the belt feeder.
The utility model adopts the technical scheme as follows:
the utility model provides a novel circulating fluidized bed boiler coal feeding device, the coal breakage pipe chute that sets up including the slope, coal breakage pipe chute bottom is connected with the coal feeding device head, coal feeding device head lateral wall extends to the water-cooled wall, the coal feeding device head forms rectangular shape coal wind passageway as broadcasting wind gap three, broadcast wind gap three and three intercommunications of broadcast coal tuber pipe, three settings of broadcast coal tuber pipe are in the coal breakage pipe chute lower part.
Preferably, the bottom of the coal dropping inclined tube is provided with a steel plate extending into the head of the coal feeding device, and the steel plate and the side wall of the head of the coal feeding device form a third air spreading opening.
Preferably, the coal dropping inclined tube and the head of the coal feeding device are rectangular tubes.
Preferably, the inclined angle of the coal falling inclined pipe and the horizontal plane is 45-60 degrees.
Preferably, the coal feeding device further comprises a coal dropping port vertically connected with the top of the coal dropping inclined tube, a coal sowing air pipe I is arranged on the coal dropping port, and the coal sowing air pipe I is communicated with a coal sowing air port I extending into the coal dropping inclined tube; and a second coal sowing air pipe is arranged at the joint of the coal falling inclined pipe and the coal falling port and is communicated with a second coal sowing air port arranged at the top of the coal falling inclined pipe.
Preferably, a groove is formed in a coal powder scouring part at the upper part of the coal dropping inclined pipe, and a casting material with good wear resistance is filled in the groove.
Preferably, a detachable cover plate is arranged on the side wall of the coal falling inclined tube and is close to the groove.
Preferably, the head of the coal feeding device is connected with the coal falling inclined tube in a welding mode.
Preferably, the head of the coal feeding device and the steel plate are made of steel castings; the coal breakage inclined tube is made of stainless steel.
Preferably, the ratio of the coal-seeding air of the third coal-seeding opening is 50%.
The coal feeding device of the utility model can reduce the impact of coal on the steel plate on the bottom side wall of the head of the coal feeding device in the process of conveying and falling, avoid the coal from being worn out and leaking and blowing out, and simultaneously can form an air cushion layer on the bottom plate of the head of the coal feeding device, effectively prevent coal powder from scouring the bottom plate and simultaneously ensure the uniformity of the scattered fuel entering a hearth; meanwhile, the belt coal feeder can be prevented from being burnt out due to the reverse channeling of the flue gas in the hearth, and the pipe explosion of the water wall pipe caused by the falling of a castable after the castable is abraded and washed by the fuel can be effectively prevented; in addition, the problem of blockage caused by accumulation of coal dust in the coal dust scouring part at the upper part of the coal falling inclined pipe can be avoided.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a structure of a head of a prior art coal feeding apparatus;
FIG. 3 is an enlarged view of section I of FIG. 2;
FIG. 4 is a structure of a head of the coal feeder of the present invention;
fig. 5 is an enlarged view of a portion of fig. 4 ii.
Wherein, the names corresponding to the reference numbers are:
1-coal dropping inclined pipe, 2-coal feeder head, 3-water cooling wall, 4-three air-sowing ports, 5-three coal-sowing air pipes, 6-steel plate, 7-coal dropping port, 8-first coal-sowing air pipes, 9-first air-sowing ports, 10-second coal-sowing air pipes, 11-second coal-sowing air pipes, 12-groove, 13-casting material, 14-cover plate and 15-casting material.
Detailed Description
The present invention will be further described with reference to the following description and examples, which include but are not limited to the following examples.
Example 1
The utility model provides a novel circulating fluidized bed boiler coal feeding device, is shown as figure 1,4,5, the coal breakage pipe chute 1 that sets up including the slope, 1 bottom of coal breakage pipe chute is connected with coal feeding device head 2, 2 lateral walls of coal feeding device head extend to water-cooled wall 3, coal feeding device head 2 forms rectangular shape coal wind passageway as broadcasting wind gap three 4, broadcasting wind gap three 4 and three 5 intercommunications of coal feeding tuber pipe, three 5 settings of coal feeding tuber pipe are in 1 lower part of coal breakage pipe chute.
The utility model provides a pair of novel circulating fluidized bed boiler coal feeding device, as shown in fig. 1,4,5, including the coal breakage pipe chute 1 that the slope set up, and with coal feeding device head 2 that 1 bottom of coal breakage pipe chute is connected, 2 lateral walls of coal feeding device head extend to water-cooled wall 3, as shown in fig. 4, with prior art coal feeding device head 2 and water-cooled wall 3 through pouring back pouring material two 15 be connected compare, as shown in fig. 2, 2 lateral walls of coal feeding device head are direct to be connected with water-cooled wall 3, can prevent effectively that fuel wearing and tearing from scouring pouring material back pouring material two 15 and drop and lead to wearing and tearing water-cooled wall 3 pipe explosion. Meanwhile, the utility model discloses a coal feeding device head 2 forms rectangular shape coal wind passageway as broadcasting three 4 in wind gap, as shown in fig. 5, broadcast three 4 in wind gap and broadcast three 5 intercommunications in coal tuber pipe, three 5 settings in coal tuber pipe are in 1 lower part in the coal breakage pipe chute, with the multi-spout aperture formula structure in the three 4 in wind gap of broadcasting of the former coal feeding device head 2 of prior art, as shown in fig. 3, change single spout bar-shaped structure into, as shown in fig. 5 to can form the air cushion layer on the bottom plate of the 2 lateral walls in coal feeding device head, effectively prevent that the buggy from scouring the bottom plate, also guaranteed simultaneously and broadcast the homogeneity behind the fuel entering furnace.
Example 2
Based on the embodiment 1, as shown in fig. 1,4 and 5, the bottom of the coal dropping inclined pipe 1 is provided with a steel plate 6 extending into the coal feeding device head 2, and the steel plate 6 and the side wall of the coal feeding device head 2 form a tuyere opening three 4. In the embodiment, the structure of the air-spreading opening three 4 is specifically explained, namely, the steel plate 6 arranged at the bottom of the coal dropping inclined pipe 1 and extending into the coal feeding device head 2 is formed by the side wall of the coal feeding device head 2, the structural design not only can form a single-nozzle long strip-shaped structure, so that an air cushion layer can be formed on the bottom plate of the coal feeding device head 2, but also can reduce the impact of coal on the side wall steel plate at the bottom of the coal feeding device head 2 in the conveying and falling process, and avoid the coal from being worn through and leaking to stop the furnace.
Example 3
Based on the embodiment 1, the coal dropping inclined pipe 1 and the coal feeding device head 2 are all rectangular pipes. In the embodiment, the coal dropping inclined tube 1 and the coal feeding device head 2 are rectangular tubes, the steel plate 6 is a square plate, and the air sowing opening three 4 forms a rectangular structure; however, the coal chute 1 and the coal feeder head 2 are not limited to rectangular pipes, and circular pipes may be selected, and the corresponding steel plates 6 are arc-shaped plates.
Example 4
Based on the embodiment 1, as shown in fig. 1, the inclined angle of the coal dropping inclined pipe 1 and the horizontal plane is 45-60 degrees. In the embodiment, the specific description is that the inclined angle of the coal dropping inclined pipe 1 and the horizontal plane is 45-60 degrees, preferably 50 degrees, and the corresponding inclined angle can be selected according to the actual situation.
Example 5
Based on the above embodiments 1-4, as shown in fig. 1, the coal feeding device further includes a coal drop opening 7 vertically connected to the top of the coal drop inclined tube 1, a coal sowing air pipe 8 is arranged on the coal drop opening 7, and the coal sowing air pipe 8 is communicated with a coal sowing opening 9 extending into the coal drop inclined tube 1; and a coal sowing air pipe II 10 is arranged at the joint of the coal breakage inclined pipe 1 and the coal breakage port 7, and the coal sowing air pipe II 10 is communicated with a coal sowing port II 11 arranged at the top of the coal breakage inclined pipe 1. In the embodiment, other structures of the coal feeding device are explained, namely the coal feeding device further comprises a coal dropping opening 7 vertically connected with the top of the coal dropping inclined tube 1, a coal feeding air pipe I8 is arranged on the coal dropping opening 7, and the coal feeding air pipe I8 is communicated with a coal feeding opening I9 extending into the coal dropping inclined tube 1; and a coal sowing air pipe II 10 is arranged at the joint of the coal breakage inclined pipe 1 and the coal breakage port 7, and the coal sowing air pipe II 10 is communicated with a coal sowing port II 11 arranged at the top of the coal breakage inclined pipe 1. Coal breakage mouth 7 is used for the feeding, and simultaneously 1 upper portion of coal breakage pipe chute sets up under the combined action of coal-feeding tuber pipe 8, broadcast wind gap one 9, broadcast wind pipe two 10, broadcast wind gap two 11 and the three 5 of the broadcast coal tuber pipe and the three 4 of broadcast wind gap that 1 bottom of coal breakage pipe chute set up for furnace lower part coal breakage mouth is the negative pressure, effectively prevents coal feeder coal blocking operation safe and reliable. In addition, the coal-feeding wind at two positions arranged at the top of the coal falling inclined pipe 1 can slow down the scouring force of the coal powder on the one hand, and on the other hand, the problem of blockage caused by the accumulation of the coal powder at the position can be avoided.
Example 6
Based on the embodiment 5, as shown in fig. 1, the pulverized coal flushing part at the upper part of the coal dropping inclined pipe 1 is provided with a groove 12, and the groove 12 is filled with a casting material 13 with good wear resistance. In the embodiment, it is specifically illustrated that a groove 12 is provided in the pulverized coal flushing part at the upper part of the coal dropping inclined tube 1, and a casting material 13 with good wear resistance is filled in the groove 12; this structure can avoid the buggy to wash directly to the metal part of the lateral wall of coal breakage pipe chute 1. In the design mode, even if the boiler runs for a long time and the wear-resistant castable is scoured and worn, due to the structure of the groove 12, a layer of coal dust can be accumulated in the groove 12, the coal dust falling from the coal dropping port 7 can be scoured on the coal dust layer, and the metal part on the side wall of the coal dropping inclined pipe 1 can not be scoured.
Example 7
Based on the above embodiment 6, as shown in fig. 1, a detachable cover plate 14 is arranged on the side wall of the coal chute 1 adjacent to the groove 12. In the embodiment, it is specifically illustrated that a detachable cover plate 14 is arranged on the side wall of the coal chute 1 adjacent to the groove 12, so as to facilitate the laying of the wear-resistant castable 13 in the groove 12 during the boiler installation and the later maintenance on site, and can be used for checking and solving the problem of blockage of the coal feeding device under special conditions. The above-mentioned detachable mounting is a detachable connection known to those skilled in the art, such as a bolt connection, and will not be described in detail herein.
Example 8
Based on the embodiment 1, the coal feeding device head 2 is connected with the coal dropping inclined pipe 1 in a welding mode. In the embodiment, the connection mode of the coal feeding device head 2 and the coal dropping inclined pipe 1 is specifically illustrated as welding.
Example 9
Based on the embodiment 2, the coal feeder head 2 and the steel plate 6 are made of cast steel; the coal dropping inclined tube 1 is made of stainless steel. In this embodiment, the material of coal feeding device head 2, coal breakage pipe chute 1 and steel sheet 6 has specifically been elucidated, and coal feeding device head 2 and steel sheet 6 material are cast steel, can be high temperature resistant, wear-resisting, and coal breakage pipe chute 1 is stainless steel.
Example 10
Based on the above example 2, as shown in fig. 1,4 and 5, the ratio of the coal-seeding air of the coal-seeding opening three 4 is 50%. In this embodiment, the ratio of the coal-feeding air at the third air-feeding opening 4 is changed from 30% to 50% in the prior art, so that the head 2 of the coal-feeding device can be cooled better, and the burning out of a belt coal feeder due to the reverse channeling of the flue gas in a hearth can be prevented.
The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention. The invention extends to any novel feature or any novel combination of features disclosed in this specification, and to any novel method or process steps or any novel combination of features disclosed.
Claims (10)
1. The utility model provides a novel circulating fluidized bed boiler coal feeding device, includes coal breakage pipe chute (1) that the slope set up, its characterized in that, coal breakage pipe chute (1) bottom is connected with coal feeding device head (2), coal feeding device head (2) lateral wall extends to water-cooled wall (3), coal feeding device head (2) form rectangular shape coal wind passageway as broadcasting wind gap three (4), broadcast wind gap three (4) and three (5) intercommunications of coal feeding tuber pipe, three (5) settings of coal feeding tuber pipe are in coal breakage pipe chute (1) lower part.
2. The novel coal feeding device of the circulating fluidized bed boiler as claimed in claim 1, wherein the bottom of the coal dropping inclined tube (1) is provided with a steel plate (6) extending into the head part (2) of the coal feeding device, and the steel plate (6) and the side wall of the head part (2) of the coal feeding device form a tuyere three (4).
3. The novel coal feeding device of the circulating fluidized bed boiler according to claim 1, wherein the coal dropping inclined tube (1) and the coal feeding device head (2) are rectangular tubes.
4. The novel coal feeding device of the circulating fluidized bed boiler according to claim 1, wherein the inclined angle of the coal dropping inclined pipe (1) with the horizontal plane is 45-60 degrees.
5. The novel coal feeding device for the circulating fluidized bed boiler is characterized by further comprising a coal dropping port (7) vertically connected with the top of the coal dropping inclined pipe (1), wherein a coal feeding air pipe I (8) is arranged on the coal dropping port (7), and the coal feeding air pipe I (8) is communicated with a coal feeding opening I (9) extending into the coal dropping inclined pipe (1); and a coal sowing air pipe II (10) is arranged at the joint of the coal breakage inclined pipe (1) and the coal breakage port (7), and the coal sowing air pipe II (10) is communicated with a coal sowing air port II (11) arranged at the top of the coal breakage inclined pipe (1).
6. The novel coal feeding device of the circulating fluidized bed boiler according to claim 5, wherein the pulverized coal flushing part at the upper part of the coal dropping inclined pipe (1) is provided with a groove (12), and the groove (12) is filled with a pouring material (13) with good wear resistance.
7. A novel coal feeding device for a circulating fluidized bed boiler according to claim 6, characterized in that a detachable cover plate (14) is arranged on the side wall of the coal dropping inclined pipe (1) adjacent to the groove (12).
8. The novel coal feeding device of the circulating fluidized bed boiler is characterized in that the head part (2) of the coal feeding device is connected with the coal dropping inclined pipe (1) in a welding mode.
9. The novel coal feeding device for the circulating fluidized bed boiler is characterized in that the material of the head (2) of the coal feeding device and the steel plate (6) are steel castings; the coal falling inclined tube (1) is made of stainless steel.
10. The novel coal feeding device for the circulating fluidized bed boiler as claimed in claim 2, wherein the coal-spreading air ratio of the third air-spreading opening (4) is 50%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022602447.XU CN214223088U (en) | 2020-11-11 | 2020-11-11 | Novel coal feeding device of circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022602447.XU CN214223088U (en) | 2020-11-11 | 2020-11-11 | Novel coal feeding device of circulating fluidized bed boiler |
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| Publication Number | Publication Date |
|---|---|
| CN214223088U true CN214223088U (en) | 2021-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022602447.XU Active CN214223088U (en) | 2020-11-11 | 2020-11-11 | Novel coal feeding device of circulating fluidized bed boiler |
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| CN (1) | CN214223088U (en) |
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- 2020-11-11 CN CN202022602447.XU patent/CN214223088U/en active Active
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