CN215259787U - Coal feeder for circulating fluidized bed boiler - Google Patents
Coal feeder for circulating fluidized bed boiler Download PDFInfo
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- CN215259787U CN215259787U CN202120225694.4U CN202120225694U CN215259787U CN 215259787 U CN215259787 U CN 215259787U CN 202120225694 U CN202120225694 U CN 202120225694U CN 215259787 U CN215259787 U CN 215259787U
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Abstract
The utility model discloses a coal feeding device of a circulating fluidized bed boiler, which comprises a coal feeding port and a coal dropping pipe which are connected with a hearth, wherein the coal dropping pipe comprises an inclined coal dropping pipe section and a vertical coal dropping pipe section; the coal feeding port comprises an outer cylinder and a cylindrical casting material laid in the outer cylinder, and the casting material is made of a wear-resistant and high-temperature-resistant material; the inclined coal dropping pipe section is superposed with the axis of the coal feeding port, and a detachable wear-resistant part is arranged at the bottom of the inclined coal dropping pipe section below the vertical coal dropping pipe section; the top of the inclined coal dropping pipe section is connected with a secondary coal-spreading air connecting pipe; the utility model discloses can reduce the wearing and tearing of coal breakage pipe corner and chute blockage and coal feed mouth by a wide margin and go into the wearing and tearing of furnace department, warp and the coking to it is smooth and easy to promote the coal feed, guarantees the continuous steady operation of boiler.
Description
Technical Field
The utility model relates to a coal feeding device, in particular to a coal feeding device for a circulating fluidized bed boiler.
Background
The circulating fluidized bed boiler meets the more strict requirement on pollutant emission by the advantages of wide fuel adaptability, high-efficiency heat efficiency, less pollutant emission and the like, 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 mainly plays a role in feeding coal in a coal hopper into a hearth for combustion so as to ensure continuous and stable supply of fuel and heat load of the boiler. However, the prior coal feeding device has the problems that the corners of the coal dropping pipe are easy to wear and block coal, and a coal feeding nozzle at a coal feeding port hearth is easy to wear, deform, coke and the like, thereby bringing hidden troubles to the continuous and stable operation of a boiler.
Disclosure of Invention
The utility model aims at the above-mentioned not enough of prior art, provide a circulating fluidized bed boiler coal feeding device, it can reduce the wearing and tearing of coal breakage pipe corner and chute blockage and the coal feeding mouth by a wide margin and go into the wearing and tearing of furnace department, warp and the coking to it is smooth and easy to promote the coal feeding, guarantees the continuous steady operation of boiler.
In order to achieve the purpose, the coal feeding device of the circulating fluidized bed boiler comprises a coal feeding port and a coal dropping pipe which are connected with a hearth, wherein the coal dropping pipe comprises an inclined coal dropping pipe section and a vertical coal dropping pipe section; is characterized in that: the coal feeding port comprises an outer cylinder and a cylindrical casting material laid in the outer cylinder, and the casting material is made of a wear-resistant and high-temperature-resistant material; the inclined coal dropping pipe section is superposed with the axis of the coal feeding port, and a detachable wear-resistant part is arranged at the bottom of the inclined coal dropping pipe section below the vertical coal dropping pipe section; the top of the inclined coal dropping pipe section is connected with a secondary coal-spreading air connecting pipe.
When the detachable abrasion-resistant part is used, the detachable abrasion-resistant part is arranged at the corner of the coal dropping pipe below the vertical coal dropping pipe section, and the abrasion-resistant part is easy to overhaul and replace after the service life is prolonged; the secondary coal-feeding air connecting pipe arranged at the top end of the corner can prevent coal from being blocked at the corner, and smooth coal feeding is promoted; the pouring material made of the wear-resistant and high-temperature-resistant material can effectively prevent the problems of abrasion deformation and the like of the coal feeding nozzle, and ensures the continuous and stable operation of the boiler;
as a further improvement of the utility model, a primary coal-spreading air sleeve is arranged outside the lower end of the inclined coal-dropping pipe section, the primary coal-spreading air sleeve is fixedly connected with the inclined coal-dropping pipe section and the outer cylinder respectively, the lower end of the primary coal-spreading air sleeve is communicated with the inner cavity of the casting material, and an air inlet interface is arranged on the primary coal-spreading air sleeve; the primary coal-feeding air casing pipe and the inclined coal-dropping pipe section form an annular coal-feeding air nozzle, so that smooth coal feeding in the coal-feeding port is ensured;
as a further improvement of the utility model, the inner ends of an air nozzle and an observation tube pass through the outer cylinder and the casting material and are communicated with the casting material inner cavity, and the outer end of the air nozzle is connected with a compressed air pipeline; the compressed air can be put into operation regularly to effectively prevent coking at the coal feeding port, and the observation pipe can be used for checking whether coking exists at the coal feeding port in the furnace;
as a further improvement of the utility model, the access door is arranged at the top of the secondary coal-spreading air connecting pipe, the door cover of the access door is connected with the door seat through a bolt, and transparent high-temperature glass is embedded in the middle of the door cover; through the access door and the transparent high-temperature glass as the observation hole, if the coal blockage situation occurs under the severe working condition, the coal blockage situation is convenient to clean in time;
as a further improvement of the utility model, the upper end of the vertical coal dropping pipe section is provided with a three-stage coal-feeding air component, the three-stage coal-feeding air component comprises a leading-in pipe fixedly connected with the upper end of the vertical coal dropping pipe section, a coal-feeding pipe arranged in the leading-in pipe, a baffle plate for connecting the lower end of the coal-feeding pipe and the inner wall of the leading-in pipe in an inclined manner, a fan cover fixedly connected with the outer wall of the coal-feeding pipe and the upper end of the leading-in pipe, and a three-stage coal-feeding air connecting pipe fixedly connected with the fan cover, wherein a plurality of coal-feeding air nozzles are arranged in the baffle plate; annular coal-spreading wind is formed at the upper end of the vertical coal-dropping pipe section, so that smooth coal feeding at the coal feeding position is ensured;
as a further improvement of the utility model, the wear-resistant part is a semicircular tile-shaped block and is connected with the inclined coal dropping pipe section through a bolt; the disassembly and the assembly are convenient;
as a further improvement of the utility model, the included angle between the inclined coal dropping pipe section and the horizontal direction and the included angle between the coal feeding port and the horizontal direction are 40-70 degrees; the larger the value is, the better the structural design allows;
to sum up, the utility model discloses can reduce the wearing and tearing of coal breakage pipe corner and chute blockage and coal feed mouth by a wide margin and go into the wearing and tearing of furnace department, warp and the coking to it is smooth and easy to promote the coal feed, guarantees the continuous steady operation of boiler.
Drawings
Fig. 1 is a front view of an embodiment of the present invention.
Fig. 2 is an enlarged view of the access door of fig. 1.
Fig. 3 is an enlarged view of the three-stage coal-feeding air assembly in fig. 1.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 3, the coal feeding device of the circulating fluidized bed boiler of the embodiment includes a coal feeding port 2 connected to a furnace 1, a coal dropping pipe 3; the coal feeding port 2 comprises an outer cylinder 21 and a cylindrical casting material 22 laid in the outer cylinder 21, the casting material 22 is made of wear-resistant and high-temperature-resistant materials, the inner ends of an air nozzle 23 and an observation tube 25 penetrate through the outer cylinder 21 and the casting material 22 and are communicated with the inner cavity of the casting material, and the outer end of the air nozzle 23 is connected with a compressed air pipeline 24; the coal dropping pipe 3 comprises an inclined coal dropping pipe section 31 and a vertical coal dropping pipe section 32 which are connected, the upper end of the vertical coal dropping pipe section 32 is provided with a three-stage coal air component 5, the three-stage coal air component 5 comprises an inlet pipe 53 fixedly connected with the upper end of the vertical coal dropping pipe section 32 in a welding manner, a coal feeding pipe 54 arranged in the inlet pipe 53, an inclined partition plate 55 connected with the lower end of the coal feeding pipe 54 and the inner wall of the inlet pipe 53, a wind cover 56 fixedly connected with the outer wall of the coal feeding pipe 54 and the upper end of the inlet pipe 53 in a welding manner, and a three-stage coal air connecting pipe 51 fixedly connected with the wind cover 56, and a plurality of coal air nozzles 52 are arranged in the partition plate 55; the inclined coal dropping pipe section 31 is overlapped with the axis of the coal feeding port 2, and the included angle beta between the inclined coal dropping pipe section 31 and the coal feeding port 2 and the horizontal direction is 40-70 degrees; the bottom of the inclined coal dropping pipe section 32 below the vertical coal dropping pipe section 32 is provided with a detachable wear-resistant part 33, and the wear-resistant part 33 is a semicircular tile-shaped block and is connected with the inclined coal dropping pipe section 31 through a plurality of bolts; the top of the inclined coal dropping pipe section 31 is connected with a secondary coal-feeding air connecting pipe 34, the top of the secondary coal-feeding air connecting pipe 34 is provided with an access door 35, a door cover 36 of the access door 35 is connected with a door seat 37 through a bolt, and transparent high-temperature glass 38 is embedded in the middle of the door cover 36; a primary coal-feeding air sleeve 4 is arranged outside the lower end of the inclined coal-dropping pipe section 31, the primary coal-feeding air sleeve 4 is respectively welded and fixedly connected with the inclined coal-dropping pipe section 31 and the outer cylinder 21, the lower end of the primary coal-feeding air sleeve 4 is communicated with the inner cavity of the pouring material 22, and an air inlet interface 41 is arranged on the primary coal-feeding air sleeve 4;
when in use, because the detachable wear-resistant part 33 is arranged at the corner of the coal dropping pipe below the vertical coal dropping pipe section 32, the wear-resistant part 33 is easy to overhaul and replace after the service life is reached; the pouring material 22 made of wear-resistant and high-temperature-resistant materials can effectively prevent the problems of abrasion, deformation and the like of a coal feeding nozzle, compressed air can be periodically put into operation through the compressed air pipeline 24 and the air nozzle 23, the coking at the coal feeding port can be effectively prevented, whether the coking condition exists at the coal feeding port in the boiler can be checked through the observation pipe 25, and the continuous and stable operation of the boiler is ensured; coal-feeding wind is introduced into the secondary coal-feeding wind connecting pipe 34 to prevent coal blockage at the corner, coal-feeding wind is introduced into the wind inlet port 41 and the tertiary coal-feeding wind connecting pipe 51, the primary coal-feeding wind sleeve 4 and the inclined coal-dropping pipe section 31 form an annular coal-feeding wind nozzle, and annular coal-feeding wind is formed at the upper end of the vertical coal-dropping pipe section 32 to promote smooth coal feeding;
through the access door 35 and the transparent high temperature glass 38 as the observation hole, if the coal blockage situation appears on the severe working condition, the cleaning is convenient and timely.
Claims (7)
1. A coal feeding device of a circulating fluidized bed boiler comprises a coal feeding port and a coal dropping pipe which are connected with a hearth, wherein the coal dropping pipe comprises an inclined coal dropping pipe section and a vertical coal dropping pipe section; the method is characterized in that: the coal feeding port comprises an outer cylinder and a cylindrical casting material laid in the outer cylinder, and the casting material is made of a wear-resistant and high-temperature-resistant material; the inclined coal dropping pipe section is superposed with the axis of the coal feeding port, and a detachable wear-resistant part is arranged at the bottom of the inclined coal dropping pipe section below the vertical coal dropping pipe section; the top of the inclined coal dropping pipe section is connected with a secondary coal-spreading air connecting pipe.
2. The circulating fluidized bed boiler coal feeding apparatus of claim 1, wherein: the lower end of the inclined coal dropping pipe section is externally provided with a primary coal-spreading air sleeve, the primary coal-spreading air sleeve is respectively and fixedly connected with the inclined coal dropping pipe section and the outer barrel, the lower end of the primary coal-spreading air sleeve is communicated with the inner cavity of the pouring material, and the primary coal-spreading air sleeve is provided with an air inlet connector.
3. The circulating fluidized bed boiler coal feeding apparatus according to claim 1 or 2, characterized in that: the inner ends of an air nozzle and an observation tube penetrate through the outer cylinder and the casting material and are communicated with the casting material inner cavity, and the outer end of the air nozzle is connected with a compressed air pipeline.
4. The circulating fluidized bed boiler coal feeding apparatus of claim 3, wherein: the access door is arranged at the top of the secondary coal-spreading air connecting pipe, the door cover of the access door is connected with the door seat through a bolt, and transparent high-temperature glass is embedded in the middle of the door cover.
5. The circulating fluidized bed boiler coal feeding apparatus of claim 4, wherein: the three-stage coal-feeding air assembly comprises a leading-in pipe fixedly connected with the upper end of the vertical coal-dropping pipe section, a coal-feeding pipe arranged in the leading-in pipe, an inclined partition plate connected with the lower end of the coal-feeding pipe and the inner wall of the leading-in pipe, an air cover fixedly connected with the outer wall of the coal-feeding pipe and the upper end of the leading-in pipe, and a three-stage coal-feeding air connecting pipe fixedly connected with the air cover, wherein a plurality of coal-feeding air nozzles are arranged in the partition plate.
6. The circulating fluidized bed boiler coal feeding apparatus of claim 5, wherein: the wear-resistant part is a semicircular tile-shaped block and is connected with the inclined coal dropping pipe section through a bolt.
7. The circulating fluidized bed boiler coal feeding apparatus of claim 6, wherein: the included angle between the falling inclined coal dropping pipe section and the horizontal direction of the coal feeding port is 40-70 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120225694.4U CN215259787U (en) | 2021-01-27 | 2021-01-27 | Coal feeder for circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120225694.4U CN215259787U (en) | 2021-01-27 | 2021-01-27 | Coal feeder for circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215259787U true CN215259787U (en) | 2021-12-21 |
Family
ID=79499752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120225694.4U Active CN215259787U (en) | 2021-01-27 | 2021-01-27 | Coal feeder for circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215259787U (en) |
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2021
- 2021-01-27 CN CN202120225694.4U patent/CN215259787U/en active Active
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