CN203797650U - Wear-resistant coal feeding pipe structure for circulating fluidized bed boiler - Google Patents
Wear-resistant coal feeding pipe structure for circulating fluidized bed boiler Download PDFInfo
- Publication number
- CN203797650U CN203797650U CN201420144585.XU CN201420144585U CN203797650U CN 203797650 U CN203797650 U CN 203797650U CN 201420144585 U CN201420144585 U CN 201420144585U CN 203797650 U CN203797650 U CN 203797650U
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- CN
- China
- Prior art keywords
- coal supply
- feeding pipe
- coal feeding
- described coal
- coal
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- Expired - Lifetime
Links
- 239000003245 coal Substances 0.000 title claims abstract description 113
- 239000000463 material Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 9
- 239000002245 particle Substances 0.000 abstract description 9
- 239000010959 steel Substances 0.000 abstract description 9
- 238000002485 combustion reaction Methods 0.000 description 3
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
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- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The utility model provides a wear-resistant coal feeding pipe structure for a circulating fluidized bed boiler. During operation, coal covers the bottom surface of a vertical coal feeding pipe, so that coal particles falling down in the vertical pipe are not in contact with a steel plate on the bottom surface of an inclined coal feeding pipe, the coal particles vertically falling down cannot further impact the steel plate on the bottom surface of the inclined coal feeding pipe, the service life of the steel plate on the bottom surface of the inclined coal feeding pipe is ensured, and the boiler can normally operate. The wear-resistant coal feeding pipe structure for the circulating fluidized bed boiler comprises the vertical coal feeding pipe and the inclined coal feeding pipe, wherein the lower end of the vertical coal feeding pipe is communicated with the upper end of the inclined coal feeding pipe; the lower outlet end of the inclined coal feeding pipe is communicated with a hearth. The wear-resistant coal feeding pipe structure for the circulating fluidized bed boiler is characterized in that a coal stacking area is arranged at the bottom end of the vertical coal feeding pipe; the inlet end surface of the inclined coal feeding pipe does not extend into an inner cavity of the vertical coal feeding pipe and is in welded connection with the outer end connection surface of the vertical coal feeding pipe.
Description
Technical field
The utility model relates to the technical field of boiler structure, is specially a kind of wear-resistant type coal-feeding tube structure for CFBB.
Background technology
Circulating fluidized-bed boiler Combustion technology is a coal combustion technology growing up over nearly 20 years, and it has that fuel tolerance is wide, efficiency of combustion is high, discharged nitrous oxides is low, load regulation rate is large and the outstanding advantages such as Load Regulation is fast.Current CFBB adopts the standpipe after stokehold or stove to add the coal-feeding mode of inclined tube mostly, as Fig. 1, in actual use, a large amount of hard coal particles impacts the bottom surface of coal supply inclined tube when falling, see " worn area " in figure, use soon, the worn out problem in coal supply inclined tube bottom surface will occur, cause the non-normal shutdown of boiler unit, have a strong impact on the safe operation of boiler plant.
Summary of the invention
For the problems referred to above, the utility model provides a kind of wear-resistant type coal-feeding tube structure for CFBB, on the bottom surface of coal supply standpipe in service, be coated with coal, the coal particle falling in standpipe so does not just contact the steel plate of coal supply inclined tube bottom surface, and then the coal particle of vertical drop cannot impact the bottom surface steel plate of coal supply inclined tube, guarantee the service life of the steel plate of coal inclined tube bottom surface, ensure the normal operation of boiler.
A kind of wear-resistant type coal-feeding tube structure for CFBB, its technical scheme is such: it comprises coal supply standpipe, coal supply inclined tube, the lower end of described coal supply standpipe is communicated with the upper end of described coal supply inclined tube, the lower part outlet end of described coal supply inclined tube is communicated with burner hearth, it is characterized in that: the bottom of described coal supply standpipe is provided with coal piling district, the inlet end face of described coal supply inclined tube is not goed deep into described coal supply riser interiors cavity, and the inlet end face of described coal supply inclined tube is welded to connect the outer end joint face of described coal supply standpipe.
It is further characterized in that: the bottom face of described coal supply standpipe is planar structure;
The bottom face of described coal supply standpipe runs parallel to the lower section junction of the inlet end face of described coal supply inclined tube;
The bottom face of described coal supply standpipe is lower than the lower section junction of the inlet end face of described coal supply inclined tube;
The cross section of described coal supply standpipe, coal supply inclined tube is rectangle, and the bottom face of described coal supply standpipe is specially the bottom surface of stainless steel materials;
Outside the lower end of described coal supply inclined tube, be equipped with air inlet.
Adopt after structure of the present utility model, because the bottom of coal supply standpipe is provided with coal piling district, in the coal piling district of the bottom of coal supply standpipe in service, be coated with coal, and the inlet end face of described coal supply inclined tube is not goed deep into described coal supply riser interiors cavity, the inlet end face of described coal supply inclined tube is welded to connect the outer end joint face of described coal supply standpipe, the coal particle falling in coal supply standpipe so does not just contact the steel plate of coal supply inclined tube bottom face, along the coal particle in coal piling district, slide into coal supply inclined tube under directly, make the coal particle of vertical drop cannot impact the bottom surface steel plate of coal supply inclined tube, guarantee the service life of the steel plate of coal inclined tube bottom surface, ensure the normal operation of boiler.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing coal-feeding tube;
Fig. 2 is the structural representation of specific embodiment of the utility model one;
Fig. 3 is the structural representation of specific embodiment of the utility model two;
Fig. 4 is the cutaway view structural representation of coal supply standpipe of the present utility model;
Fig. 5 is the cutaway view structural representation of coal supply inclined tube of the present utility model.
The specific embodiment
A kind of wear-resistant type coal-feeding tube structure for CFBB, see Fig. 2～Fig. 5, it comprises coal supply standpipe 1, coal supply inclined tube 2, the lower end of described coal supply standpipe 1 is communicated with the upper end of described coal supply inclined tube 2, the lower part outlet end of described coal supply inclined tube 2 is communicated with burner hearth 3, the bottom of coal supply standpipe 1 is provided with coal piling district 4, and the inlet end face of described coal supply inclined tube 2 is not goed deep into described coal supply standpipe 1 internal cavity, and the inlet end face of described coal supply inclined tube 2 is welded to connect the outer end joint face of described coal supply standpipe 2.The bottom face 5 of coal supply standpipe 1 is planar structure; The cross section of described coal supply standpipe 1, coal supply inclined tube 2 is rectangle, and the bottom face 5 of described coal supply standpipe 1 is specially the bottom surface of stainless steel materials; Outside the lower end of coal supply inclined tube 2, be equipped with air inlet 6.The direction of motion that in figure, arrow is coal particle.
Specific embodiment one, is shown in Fig. 2: the bottom face 5 of described coal supply standpipe 1 runs parallel to the lower section junction 7 of the inlet end face of described coal supply inclined tube 2.
Specific embodiment two, is shown in Fig. 3: the bottom face 5 of described coal supply standpipe 1 is lower than the lower section junction 7 of the inlet end face of described coal supply inclined tube 2.
Claims (6)
1. the wear-resistant type coal-feeding tube structure for CFBB, it comprises coal supply standpipe, coal supply inclined tube, the lower end of described coal supply standpipe is communicated with the upper end of described coal supply inclined tube, the lower part outlet end of described coal supply inclined tube is communicated with burner hearth, it is characterized in that: the bottom of described coal supply standpipe is provided with coal piling district, the inlet end face of described coal supply inclined tube is not goed deep into described coal supply riser interiors cavity, and the inlet end face of described coal supply inclined tube is welded to connect the outer end joint face of described coal supply standpipe.
2. a kind of wear-resistant type coal-feeding tube structure for CFBB according to claim 1, is characterized in that: the bottom face of described coal supply standpipe is planar structure.
3. a kind of wear-resistant type coal-feeding tube structure for CFBB according to claim 2, is characterized in that: the bottom face of described coal supply standpipe runs parallel to the lower section junction of the inlet end face of described coal supply inclined tube.
4. a kind of wear-resistant type coal-feeding tube structure for CFBB according to claim 2, is characterized in that: the bottom face of described coal supply standpipe is lower than the lower section junction of the inlet end face of described coal supply inclined tube.
5. a kind of wear-resistant type coal-feeding tube structure for CFBB according to claim 1, is characterized in that: the cross section of described coal supply standpipe, coal supply inclined tube is rectangle, and the bottom face of described coal supply standpipe is specially the bottom surface of stainless steel materials.
6. a kind of wear-resistant type coal-feeding tube structure for CFBB according to claim 1, is characterized in that: outside the lower end of described coal supply inclined tube, be equipped with air inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420144585.XU CN203797650U (en) | 2014-03-28 | 2014-03-28 | Wear-resistant coal feeding pipe structure for circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420144585.XU CN203797650U (en) | 2014-03-28 | 2014-03-28 | Wear-resistant coal feeding pipe structure for circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203797650U true CN203797650U (en) | 2014-08-27 |
Family
ID=51379858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420144585.XU Expired - Lifetime CN203797650U (en) | 2014-03-28 | 2014-03-28 | Wear-resistant coal feeding pipe structure for circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203797650U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912870A (en) * | 2014-03-28 | 2014-07-09 | 无锡华光锅炉股份有限公司 | Wear-resistant type coal supply pipe structure for circulating fluidized bed boiler |
-
2014
- 2014-03-28 CN CN201420144585.XU patent/CN203797650U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912870A (en) * | 2014-03-28 | 2014-07-09 | 无锡华光锅炉股份有限公司 | Wear-resistant type coal supply pipe structure for circulating fluidized bed boiler |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |