CN103912870A - Wear-resistant type coal supply pipe structure for circulating fluidized bed boiler - Google Patents
Wear-resistant type coal supply pipe structure for circulating fluidized bed boiler Download PDFInfo
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- CN103912870A CN103912870A CN201410120217.6A CN201410120217A CN103912870A CN 103912870 A CN103912870 A CN 103912870A CN 201410120217 A CN201410120217 A CN 201410120217A CN 103912870 A CN103912870 A CN 103912870A
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- coal supply
- supply pipe
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Abstract
The invention provides a wear-resistant type coal supply pipe structure for a circulating fluidized bed boiler. During operation, coal covers the bottom surface of an upright coal supply pipe, so that coal particles falling down in the upright pipe cannot contact a steel plate on the bottom surface of an inclined coal supply pipe, the coal particles which vertically fall down cannot further impact the steel plate on the bottom surface of the inclined coal supply pipe, the service life of the steel plate on the bottom surface of the inclined coal supply pipe is guaranteed, and the boiler can normally operate. The wear-resistant type coal supply pipe structure comprises the upright coal supply pipe and the inclined coal supply pipe, wherein the lower end of the upright coal supply pipe is communicated with the upper end of the inclined coal supply pipe; the lower outlet end of the inclined coal supply pipe is communicated with a hearth. The wear-resistant type coal supply pipe structure is characterized in that a coal stacking area is arranged at the bottom end of the upright coal supply pipe; the inlet end surface of the inclined coal supply pipe does not stretch into an inner cavity of the upright coal supply pipe and is in welded connection with the outer connection surface of the upright coal supply pipe.
Description
Technical field
The present invention relates to the technical field of boiler structure, be 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 in the time 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 invention 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 invention, 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, slide into coal supply inclined tube along the coal particle in coal piling district 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 embodiments of the invention one;
Fig. 3 is the structural representation of specific embodiments of the invention two;
Fig. 4 is the cutaway view structural representation of coal supply standpipe of the present invention;
Fig. 5 is the cutaway view structural representation of coal supply inclined tube of the present invention.
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 |
|---|---|---|---|
| CN201410120217.6A CN103912870B (en) | 2014-03-28 | 2014-03-28 | A kind of wear-resistant type coal-feeding tube structure for CFBB |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410120217.6A CN103912870B (en) | 2014-03-28 | 2014-03-28 | A kind of wear-resistant type coal-feeding tube structure for CFBB |
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| CN103912870A true CN103912870A (en) | 2014-07-09 |
| CN103912870B CN103912870B (en) | 2017-01-04 |
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| CN201410120217.6A Active CN103912870B (en) | 2014-03-28 | 2014-03-28 | A kind of wear-resistant type coal-feeding tube structure for CFBB |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5829368A (en) * | 1996-12-31 | 1998-11-03 | Combustion Engineering, Inc. | Fuel and sorbent feed for circulating fluidized bed steam generator |
| CN201992632U (en) * | 2011-03-18 | 2011-09-28 | 中国电力企业联合会科技开发服务中心 | Annular sealing nozzle purging and coal feeding pipeline of fluidized bed boiler |
| CN102537948A (en) * | 2012-02-23 | 2012-07-04 | 无锡华光锅炉股份有限公司 | Replaceable abrasion-resistant coal feeding pipe for circulating fluid bed boiler |
| CN102976083A (en) * | 2012-12-05 | 2013-03-20 | 江苏永钢集团有限公司 | Anti-abrasion funnel |
| CN103453524A (en) * | 2013-09-05 | 2013-12-18 | 无锡华光锅炉股份有限公司 | Rectangular coal feeding pipe for circulating fluidized bed boiler |
| CN203797650U (en) * | 2014-03-28 | 2014-08-27 | 无锡华光锅炉股份有限公司 | Wear-resistant coal feeding pipe structure for circulating fluidized bed boiler |
-
2014
- 2014-03-28 CN CN201410120217.6A patent/CN103912870B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5829368A (en) * | 1996-12-31 | 1998-11-03 | Combustion Engineering, Inc. | Fuel and sorbent feed for circulating fluidized bed steam generator |
| CN201992632U (en) * | 2011-03-18 | 2011-09-28 | 中国电力企业联合会科技开发服务中心 | Annular sealing nozzle purging and coal feeding pipeline of fluidized bed boiler |
| CN102537948A (en) * | 2012-02-23 | 2012-07-04 | 无锡华光锅炉股份有限公司 | Replaceable abrasion-resistant coal feeding pipe for circulating fluid bed boiler |
| CN102976083A (en) * | 2012-12-05 | 2013-03-20 | 江苏永钢集团有限公司 | Anti-abrasion funnel |
| CN103453524A (en) * | 2013-09-05 | 2013-12-18 | 无锡华光锅炉股份有限公司 | Rectangular coal feeding pipe for circulating fluidized bed boiler |
| CN203797650U (en) * | 2014-03-28 | 2014-08-27 | 无锡华光锅炉股份有限公司 | Wear-resistant coal feeding pipe structure for circulating fluidized bed boiler |
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| CN103912870B (en) | 2017-01-04 |
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Address after: 214028 No. 3 Chengnan Road, new Wu District, Jiangsu, Wuxi Patentee after: Wuxi Huaguang Environmental Protection Energy Group Co., Ltd Address before: 214028 No. 3 Chengnan Road, New District, Jiangsu, Wuxi Patentee before: WUXI HUAGUANG BOILER Co.,Ltd. |