CN219656057U - Material returning device for circulating fluidized bed boiler - Google Patents
Material returning device for circulating fluidized bed boiler Download PDFInfo
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- CN219656057U CN219656057U CN202320274977.7U CN202320274977U CN219656057U CN 219656057 U CN219656057 U CN 219656057U CN 202320274977 U CN202320274977 U CN 202320274977U CN 219656057 U CN219656057 U CN 219656057U
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- pipe
- pipe section
- fluidized bed
- circulating fluidized
- bed boiler
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- 239000000463 material Substances 0.000 title claims abstract description 58
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 238000005243 fluidization Methods 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 235000019738 Limestone Nutrition 0.000 claims description 4
- 238000006477 desulfuration reaction Methods 0.000 claims description 4
- 230000023556 desulfurization Effects 0.000 claims description 4
- 239000006028 limestone Substances 0.000 claims description 4
- 238000005192 partition Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
Landscapes
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The utility model provides a return device for circulating fluidized bed boiler, is including being used for the upright material pipe that links to each other with the separator, the below of upright material pipe is equipped with the plenum, the below of plenum is equipped with the ash bucket, one side of upright material pipe is equipped with the feed back pipe that is used for linking to each other with the furnace of boiler, upright material pipe, plenum, feed back inside are linked together, the inside division board that is used for reducing upright material pipe and feed back cross section that is equipped with of upright material pipe, form the passageway between division board and the plenum, the outer wall of feed back pipe passes through fixing device and links to each other with the outer wall of boiler is fixed, the upper end of upright material pipe passes through connecting device and links to each other with the separator is fixed, the furnace clearance of feed back pipe and boiler passes through sealing device and seals.
Description
Technical Field
The utility model relates to the technical field of thermal power generation equipment, in particular to a material returning device for a circulating fluidized bed boiler.
Background
During thermal power generation, a returning device is needed, and the returning device is used for continuously and stably sending the high-temperature solid materials separated by the separator back to a dense-phase region of the hearth with positive pressure, so that the positive pressure of the hearth is overcome, and the high-temperature flue gas is prevented from reversely flowing to the separator.
The material returning device in the prior art has the following defects: the returning device is unstable when fixed with the circulating fluidized bed boiler, and the skew of feed back pipe is caused, and the returning device is unstable when fixed with the separator, and the skew of standing material pipe is caused to influence the returning effect.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a returning device which is fixedly and firmly connected with a separator and a filter and is used for a circulating fluidized bed boiler.
The technical scheme adopted by the utility model is that the material returning device for the circulating fluidized bed boiler comprises a vertical material pipe used for being connected with a separator, an air chamber is arranged below the vertical material pipe, an ash bucket is arranged below the air chamber, a material returning pipe used for being connected with a hearth of the boiler is arranged on one side of the vertical material pipe, the air chamber and the interior of the material returning pipe are communicated, a partition plate used for reducing the cross section of the vertical material pipe and the cross section of the material returning pipe is arranged in the vertical material pipe, a channel is formed between the partition plate and the air chamber, the outer wall of the material returning pipe is fixedly connected with the outer wall of the boiler through a fixing device, the upper end of the vertical material pipe is fixedly connected with the separator through a connecting device, and a hearth gap between the material returning pipe and the boiler is sealed through a sealing device.
The fixing device comprises a hoop fixedly connected with the feed back pipe, one end of the hoop is fixedly connected with a flat steel, the outer wall of the boiler is provided with a mounting part with a first through hole, the flat steel is provided with a second through hole, and a bolt passes through the first through hole and the second through hole and then is fixed with a nut through threads.
The connecting device comprises a circular ring, wherein the circular ring is positioned at the joint of the separator and the vertical material pipe, steel plates which are uniformly distributed are fixedly arranged on the periphery of the circular ring, and the separator and the vertical material pipe are fixedly connected with each other on two sides of the steel plates respectively.
The feed back pipe comprises a first pipe section, a second pipe section and a third pipe section, wherein the first pipe section, the second pipe section and the third pipe section are internally communicated, the first pipe section is horizontally arranged, the second pipe section is vertically arranged, the third pipe section is obliquely arranged, the first pipe section is communicated with the vertical pipe, and the third pipe section is communicated with a hearth of a boiler.
A reinforcing plate is arranged between the included angle between the first pipe section and the vertical pipe, and two sides of the reinforcing plate are respectively fixed with the first pipe section and the vertical pipe.
According to the utility model, the first pipe section is provided with a limestone desulfurization interface, the second pipe section is provided with an expansion joint, and the outer wall of the third pipe section is fixedly connected with the outer wall of the boiler through a fixing device.
The number of the air chambers is four, the upper ends of the four air chambers are respectively connected with a fluidization air cap, a conveying air cap, an independent air cap and a loosening air cap, the fluidization air caps are communicated with a fluidization air pipe with a first regulating valve, the conveying air caps are communicated with a conveying air pipe with a second regulating valve, the independent air caps are communicated with an independent air pipe with a third regulating valve, the loosening air caps are communicated with a loosening air pipe with a fourth regulating valve, the independent air caps are positioned under a separator, and the third regulating valve is a gate valve.
The sealing device is a sealing cover, and the sealing cover is positioned between the inner part of a boiler furnace and the outer wall of a feed back pipe.
The vertical material pipe is provided with a pressure test sleeve capable of accommodating a pressure gauge, and the return material pipe is provided with a temperature test sleeve capable of accommodating a thermometer.
The vertical material pipe is further provided with a shaking stopping device, the shaking stopping device comprises a first upright post combined with the ground and a second upright post combined with the ground, a connecting rod which is horizontally arranged is arranged between the first upright post and the second upright post, and a shaking stopping ring which is fixed with the vertical material pipe is arranged in the middle of the connecting rod.
Compared with the prior art, the utility model has the beneficial effects that:
1. according to the utility model, the feed back pipe and the outer wall of the boiler are fixed through the fixing device, the vertical pipe and the separator are fixed through the connecting device, and the feed back pipe and the hearth of the boiler are sealed through the sealing device, so that the stability of the device in the working process is ensured.
2. According to the utility model, the first pipe section is provided with the limestone desulfurization interface, limestone is pyrolyzed in advance in the first pipe section, and is desulfurized after being calcined in the hearth, so that the method has the advantage of high desulfurization efficiency, and has good economic and social benefits. The conversion from the treatment outside the furnace to the low emission in the furnace is realized, the pollutant emission is reduced from the inner head of the furnace, and the initial ultralow emission of the sulfur dioxide of the boiler is further realized.
3. According to the embodiment, the independent air chamber is arranged and the independent valve is arranged, so that the air quantity requirements of different parts of the material returning device can be flexibly and effectively met, the application range is wide, and the ash accumulation and coking of the circulating fluidized bed material returning device are prevented.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Detailed Description
The utility model is further illustrated by way of example with reference to the accompanying drawings.
As shown in fig. 1, the material returning device for the circulating fluidized bed boiler in the embodiment comprises a vertical material pipe 2 connected with a separator 1, an air chamber 3 is arranged below the vertical material pipe 2, an ash bucket 4 is arranged below the air chamber 3, a material returning pipe 6 connected with a hearth of the boiler 5 is arranged on one side of the vertical material pipe 2, the air chamber 3 and the interior of the material returning pipe 6 are communicated, a partition plate 21 for reducing the cross section of the vertical material pipe 2 and the material returning pipe 6 is arranged in the vertical material pipe 2, a channel is formed between the partition plate 21 and the air chamber 3, the outer wall of the material returning pipe 6 is fixedly connected with the outer wall of the boiler 5 through a fixing device 7, the upper end of the vertical material pipe 2 is fixedly connected with the separator 1 through a connecting device 8, and a hearth gap between the material returning pipe 6 and the boiler 1 is sealed through a sealing device 9; in the embodiment, the feed back pipe 6 and the outer wall of the boiler are fixed through the fixing device 7, the vertical pipe 2 and the separator 1 are fixed through the connecting device 8, and the hearth of the feed back pipe 6 and the boiler 5 is sealed through the sealing device 9, so that the stability of the device in the working process is ensured.
The specific structure of the fixing device 7 is as follows: the fixing device 7 comprises a hoop 71 fixedly connected with the feed back pipe 6, one end of the hoop 71 is fixedly connected with a flat steel 72, the outer wall of the boiler 5 is provided with a mounting part 51 with a first through hole, the flat steel 72 is provided with a second through hole, and a bolt 73 passes through the first through hole and the second through hole and then is fixed with a nut through threads.
The specific structure of the connecting device 8 is as follows: the connecting device 8 comprises a circular ring 81, the circular ring 81 is positioned at the joint of the separator 1 and the standing pipe 2, steel plates 82 which are uniformly distributed are fixedly arranged on the periphery of the circular ring 81, and the separator 1 and the standing pipe 2 are fixedly connected with each other on two sides of the steel plates 82.
The concrete structure of the feed back pipe 6 is as follows: the feed back pipe 6 comprises a first pipe section 61, a second pipe section 62 and a third pipe section 63, wherein the first pipe section 61, the second pipe section 62 and the third pipe section 63 are internally communicated, the first pipe section 61 is horizontally arranged, the second pipe section 62 is vertically arranged, the third pipe section 63 is obliquely arranged, the first pipe section 61 is communicated with the vertical pipe 2, and the third pipe section 63 is communicated with a hearth of the boiler 5.
The specific structure of the sealing device 9 is as follows: the sealing device 9 is a sealing cover, and the sealing cover is positioned between the inner part of the hearth of the boiler 5 and the outer wall of the feed back pipe 6.
As preferable: a reinforcing plate 64 is arranged between the first pipe section 61 and the vertical pipe 2, and two sides of the reinforcing plate 64 are respectively fixed with the first pipe section 61 and the vertical pipe 2; the reinforcement plate 64 serves to reinforce the connection between the first pipe section 61 and the riser pipe 2, enhancing its stability.
The number of the air chambers 3 is four, the upper ends of the four air chambers 3 are respectively connected with a fluidization air cap 31, a conveying air cap 32, an independent air cap 33 and a loosening air cap 34, the fluidization air cap 31 is communicated with a fluidization air pipe 312 with a first regulating valve 311, the conveying air cap 32 is communicated with a conveying air pipe 322 with a second regulating valve 321, the independent air cap 33 is communicated with an independent air pipe 332 with a third regulating valve 331, the loosening air cap 34 is communicated with a loosening air pipe 342 with a fourth regulating valve 341, the independent air cap 33 is positioned right below the separator 1, and the third regulating valve 331 is a gate valve. According to the embodiment, the independent air chambers 3 are arranged and are provided with the independent valves, so that the air quantity requirements of different parts of the material returning device can be flexibly and effectively met, dust accumulation and coking of the circulating fluidized bed material returning device are prevented, the three air chambers supply air according to the requirements, the temperature of returned dust and the returned quantity are controlled more effectively, and the running cost is reduced.
In this embodiment, the vertical pipe 2 is provided with a pressure testing sleeve 22 capable of accommodating a pressure gauge, the pressure inside the vertical pipe 2 is tested by the pressure gauge, the return pipe 6 is provided with a temperature testing sleeve 67 capable of accommodating a thermometer, and the temperature inside the return pipe 6 is measured by the thermometer, so that timely adjustment is facilitated.
The vertical pipe 2 is further provided with a shaking stopping device 23, the shaking stopping device 23 comprises a first upright 24 combined with the ground and a second upright 27 combined with the ground, a connecting rod 25 horizontally arranged is arranged between the first upright 24 and the second upright 27, and a shaking stopping ring 26 fixed with the vertical pipe 2 is arranged in the middle of the connecting rod 25; the anti-shaking device 23 is used for preventing the vertical pipe 2 from shaking and increasing the stability thereof.
Claims (10)
1. A return device for circulating fluidized bed boiler, its characterized in that, including being used for standing material pipe (2) that link to each other with separator (1), the below of standing material pipe (2) is equipped with plenum (3), the below of plenum (3) is equipped with ash bucket (4), one side of standing material pipe (2) is equipped with feed back pipe (6) that are used for linking to each other with the furnace of boiler (5), stand material pipe (2), plenum (3), feed back pipe (6) inside be linked together, stand material pipe (2) inside be equipped with be used for reducing stand material pipe (2) and feed back pipe (6) cross section division board (21), form the passageway between division board (21) and plenum (3), the outer wall of feed back pipe (6) is fixed continuous with the outer wall of boiler (5) through fixing device (7), the upper end of standing material pipe (2) is fixed continuous with separator (1) through connecting device (8), the furnace clearance of feed back pipe (6) and boiler (5) is sealed through sealing device (9).
2. The material returning device for the circulating fluidized bed boiler according to claim 1, wherein the fixing device (7) comprises a hoop (71) fixedly connected with the material returning pipe (6), one end of the hoop (71) is fixedly connected with a flat steel (72), the outer wall of the boiler (5) is provided with a mounting part (51) with a first through hole, the flat steel (72) is provided with a second through hole, and a bolt (73) is fixed with a nut through the first through hole and the second through hole.
3. The material returning device for the circulating fluidized bed boiler according to claim 1, wherein the connecting device (8) comprises a circular ring (81), the circular ring (81) is positioned at the joint of the separator (1) and the vertical pipe (2), steel plates (82) which are uniformly distributed are fixedly arranged on the periphery of the circular ring (81), and two sides of the steel plates (82) are respectively fixedly connected with the separator (1) and the vertical pipe (2).
4. The return device for a circulating fluidized bed boiler according to claim 1, wherein the return pipe (6) comprises a first pipe section (61), a second pipe section (62) and a third pipe section (63), wherein the first pipe section (61), the second pipe section (62) and the third pipe section (63) are internally communicated, the first pipe section (61) is horizontally arranged, the second pipe section (62) is vertically arranged, the third pipe section (63) is obliquely arranged, the first pipe section (61) is communicated with the vertical pipe (2), and the third pipe section (63) is communicated with a furnace chamber of the boiler (5).
5. The material returning device for the circulating fluidized bed boiler according to claim 4, wherein a reinforcing plate (64) is arranged between the first pipe section (61) and the included angle of the vertical pipe (2), and two sides of the reinforcing plate (64) are respectively fixed with the first pipe section (61) and the vertical pipe (2).
6. The return device for a circulating fluidized bed boiler according to claim 4, characterized in that the first pipe section (61) is provided with a limestone desulfurization interface (65), the second pipe section (62) is provided with an expansion joint (66), and the outer wall of the third pipe section (63) is fixedly connected with the outer wall of the boiler (5) by a fixing device (7).
7. The material returning device for the circulating fluidized bed boiler according to claim 1, wherein the number of the air chambers (3) is four, the upper ends of the four air chambers (3) are respectively connected with a fluidization air cap (31), a conveying air cap (32), an independent air cap (33) and a loosening air cap (34), the fluidization air cap (31) is communicated with a fluidization air pipe (312) with a first regulating valve (311), the conveying air cap (32) is communicated with a conveying air pipe (322) with a second regulating valve (321), the independent air cap (33) is communicated with an independent air pipe (332) with a third regulating valve (331), the loosening air cap (34) is communicated with a loosening air pipe (342) with a fourth regulating valve (341), the independent air cap (33) is positioned right below the separator (1), and the third regulating valve (331) is a gate valve.
8. A return device for a circulating fluidized bed boiler according to claim 1, characterized in that the sealing means (9) is a sealing cap located between the interior of the furnace of the boiler (5) and the outer wall of the return pipe (6).
9. A return device for a circulating fluidized bed boiler according to claim 1, characterized in that the stand pipe (2) is provided with a pressure testing sleeve (22) accommodating a pressure gauge, and the return pipe (6) is provided with a temperature testing sleeve (67) accommodating a thermometer.
10. The return device for a circulating fluidized bed boiler according to claim 1, wherein the vertical pipe (2) is further provided with a shaking stopping device (23), the shaking stopping device (23) comprises a first upright (24) combined with the ground and a second upright (27) combined with the ground, a connecting rod (25) horizontally arranged is arranged between the first upright (24) and the second upright (27), and a shaking stopping ring (26) fixed with the vertical pipe (2) is arranged in the middle of the connecting rod (25).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223492699 | 2022-12-27 | ||
| CN2022234926997 | 2022-12-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219656057U true CN219656057U (en) | 2023-09-08 |
Family
ID=87858163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320274977.7U Active CN219656057U (en) | 2022-12-27 | 2023-02-22 | Material returning device for circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219656057U (en) |
-
2023
- 2023-02-22 CN CN202320274977.7U patent/CN219656057U/en active Active
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