CN109185873B - Coal feeding port device for circulating fluidized bed boiler - Google Patents
Coal feeding port device for circulating fluidized bed boiler Download PDFInfo
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- CN109185873B CN109185873B CN201811149668.7A CN201811149668A CN109185873B CN 109185873 B CN109185873 B CN 109185873B CN 201811149668 A CN201811149668 A CN 201811149668A CN 109185873 B CN109185873 B CN 109185873B
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- feeding pipe
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- 239000003245 coal Substances 0.000 title claims abstract description 192
- 239000011819 refractory material Substances 0.000 claims abstract description 40
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 25
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 25
- 238000005299 abrasion Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 5
- 238000009331 sowing Methods 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 23
- 239000010935 stainless steel Substances 0.000 description 23
- 239000000463 material Substances 0.000 description 15
- 230000008859 change Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000009407 construction method and process Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/22—Fuel feeders specially adapted for fluidised bed combustion apparatus
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
A coal feeding port device for a circulating fluidized bed boiler relates to the field of boiler equipment. The invention comprises an inner pipe of a coal feeding pipe and an outer pipe of the coal feeding pipe, wherein the inner pipe of the coal feeding pipe is positioned in the outer pipe of the coal feeding pipe at the upper half section, and the inner pipe of the coal feeding pipe at the second section is positioned in the outer pipe of the coal feeding pipe at the lower half section; a wear-resistant refractory material layer is paved on the inner wall of the inner pipe of the coal feeding pipe in the second section; the part of the first section of coal feeding pipe inner pipe extending out of the upper half section of coal feeding pipe outer pipe is inserted into the upper end port of the second section of coal feeding pipe inner pipe; the lower end of the wear-resistant refractory material layer extends out of the inner pipe of the second section coal feeding pipe and is positioned in the hearth; the upper half coal feeding pipe outer pipe and the lower half coal feeding pipe outer pipe are connected through a pair of flanges. The invention is used for the coal feeding port of the circulating fluidized bed boiler.
Description
Technical Field
The invention relates to the field of boiler equipment, in particular to a coal feeding port device for a circulating fluidized bed boiler.
Background
Since the seventies of the 20 th century, circulating fluidized bed boilers have been developed rapidly at the beginning of their domestic rise due to their unique advantages of wide fuel adaptability, high combustion efficiency, good load regulation performance, low pollutant emissions, comprehensive utilization of ash and slag, etc. Along with the increase of global energy conservation and emission reduction pressure, the circulating fluidized bed boiler is continuously developed to the large-scale direction. The coal feeding port of the existing circulating fluidized bed boiler is generally formed by rolling a stainless steel plate, and due to the gradual increase of the capacity of the unit, the coal feeding amount and the diameter of the coal feeding port are correspondingly changed, and the problems of abrasion, overtemperature, deformation and the like of the stainless steel plate of the coal feeding port gradually occur in the running process, so that the safe and stable running of the unit is affected; the coal feed port is generally provided with a layer of wear-resistant refractory material, but the construction method has complex process, long site construction period and high replacement cost, and is not beneficial to the replacement of the damaged place of the coal feed port in the later stage.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: when the wear-resistant refractory material layer is arranged on the coal feeding port, the problems of complex construction method and process, long site construction period, inconvenience for the replacement of the coal feeding port in the later period and high replacement cost exist, and the coal feeding port device for the circulating fluidized bed boiler is further provided.
The invention adopts the technical scheme for solving the technical problems that: the coal feeding port device comprises a coal feeding pipe inner pipe 1 and a coal feeding pipe outer pipe 2, wherein the coal feeding pipe outer pipe 2 is sleeved outside the coal feeding pipe inner pipe 1 and forms a gap between the coal feeding pipe inner pipe and the coal feeding pipe outer pipe; the lower ends of the inner coal feeding pipe 1 and the outer coal feeding pipe 2 are inserted into the hearth wall from the outside and are inclined downwards;
the coal feeding pipe outer pipe 2 comprises an upper half coal feeding pipe outer pipe 2-1 and a lower half coal feeding pipe outer pipe 2-2; the inner diameter of the upper end of the outer tube 2-1 of the upper half coal feeding tube is smaller than that of the lower end, and the inner diameter of the outer tube 2-2 of the lower half coal feeding tube is the same as that of the lower end of the outer tube 2-1 of the upper half coal feeding tube; the coal feeding pipe inner pipe 1 comprises a first section of coal feeding pipe inner pipe 1-1 and a second section of coal feeding pipe inner pipe 1-2, wherein the first section of coal feeding pipe inner pipe 1-1 is positioned in the upper half section of coal feeding pipe outer pipe 2-1, and the lower end of the first section of coal feeding pipe inner pipe 1-1 extends out of the pipe; the second section of coal feeding pipe inner pipe 1-2 is positioned in the lower half section of coal feeding pipe outer pipe 2-2;
a wear-resistant refractory material layer 4 is paved on the inner wall of the inner pipe 1-2 of the second section coal feeding pipe; the part of the first section of coal feeding pipe inner pipe 1-1 extending out of the upper half section of coal feeding pipe outer pipe 2-1 is inserted into the upper end port of the second section of coal feeding pipe inner pipe 1-2; the lower end of the abrasion-resistant refractory material layer 4 extends out of the inner pipe 1-2 of the second section coal feeding pipe and is positioned in the hearth 5;
the upper half coal feeding pipe outer pipe 2-1 and the lower half coal feeding pipe outer pipe 2-2 are connected through a pair of flanges 3.
The beneficial effects of the invention are as follows: the coal feeding port device is divided into two sections through the flange, when the coal feeding port extending into the hearth is damaged and deformed, the second section of the inner pipe 1-2 of the coal feeding pipe, the inner wall of which is attached with the wear-resistant refractory material layer 4, is directly replaced and is connected again, and the method is simple, saves cost and has short construction period.
Drawings
FIG. 1 is a schematic cross-sectional view of the overall structure of a coal feed port device;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a schematic structural view of the connection of the outer tube 2-1 of the upper coal feeding tube and the flange plate;
FIG. 4 is a cylinder formed by integrally rolling a wear-resistant refractory material layer and a second section of coal pipe inner pipe;
FIG. 5 is an expanded view of FIG. 4;
fig. 6 is a side view of fig. 5.
Detailed Description
The technical scheme of the invention is further described by the following specific embodiments with reference to the accompanying drawings:
the first embodiment is as follows: the coal feeding port device in the embodiment comprises a coal feeding pipe inner pipe 1 and a coal feeding pipe outer pipe 2, wherein the coal feeding pipe outer pipe 2 is sleeved outside the coal feeding pipe inner pipe 1, a certain gap is formed between the coal feeding pipe inner pipe and the coal feeding pipe inner pipe, and sealing air of coal feeding is conveyed into a hearth 5 through the gap; the lower ends of the inner coal feeding pipe 1 and the outer coal feeding pipe 2 are inserted into the hearth wall from the outside and are inclined downwards;
as shown in fig. 2: the coal feeding pipe outer pipe 2 consists of two sections, including an upper half coal feeding pipe outer pipe 2-1 and a lower half coal feeding pipe outer pipe 2-2; the inner diameter of the upper end of the outer tube 2-1 of the upper half coal feeding tube is smaller than that of the lower end, and the inner diameter of the outer tube 2-2 of the lower half coal feeding tube is the same as that of the lower end of the outer tube 2-1 of the upper half coal feeding tube;
as shown in fig. 2: the coal feeding pipe inner pipe 1 comprises a first section of coal feeding pipe inner pipe 1-1 and a second section of coal feeding pipe inner pipe 1-2, wherein the first section of coal feeding pipe inner pipe 1-1 is positioned in the upper half section of coal feeding pipe outer pipe 2-1, and the lower end of the first section of coal feeding pipe inner pipe 1-1 extends out of the pipe; the second section of coal feeding pipe inner pipe 1-2 is positioned in the lower half section of coal feeding pipe outer pipe 2-2 and is fixed in the lower half section of coal feeding pipe outer pipe 2-2 by friction of a fixed block 7; when the second-section coal feeding pipe inner pipe 1-2 is installed, a plurality of fixing blocks 7 are welded on the outer wall of the second-section coal feeding pipe inner pipe 1-2, and the second-section coal feeding pipe inner pipe is fixed by friction between the fixing blocks 7 and the inner wall of the lower-half coal feeding pipe outer pipe 2-2.
As shown in fig. 1: a wear-resistant refractory material layer 4 is paved on the inner wall of the inner pipe 1-2 of the second section coal feeding pipe; the part of the first section of coal feeding pipe inner pipe 1-1 extending out of the upper half section of coal feeding pipe outer pipe 2-1 is inserted into the upper end port of the second section of coal feeding pipe inner pipe 1-2; the lower end of the abrasion-resistant refractory material layer 4 extends out of the inner pipe 1-2 of the second section coal feeding pipe and is positioned in the hearth 5;
as shown in fig. 2 and 3: the upper half coal feeding pipe outer pipe 2-1 and the lower half coal feeding pipe outer pipe 2-2 are connected through a pair of flanges 3, one flange is arranged at the outlet of the upper half coal feeding pipe outer pipe 2-1, and the other flange is arranged at the inlet of the lower half coal feeding pipe outer pipe 2-2.
The coal feeding port device is divided into two sections through the flange plates, when the coal feeding port extending into the hearth is damaged and deformed, the two flange plates are disassembled, the second section coal feeding pipe inner pipe 1-2 with the wear-resistant refractory material layer 4 attached to the inner wall is directly pulled out from the lower half section coal feeding pipe outer pipe to be replaced, the fixing block 7 is welded on the outer wall of the new second section coal feeding pipe inner pipe, and then the new second section coal feeding pipe inner pipe is reinserted into the lower half section coal feeding pipe outer pipe, so that the device is convenient and simple to disassemble and install, and the cost is saved.
The second embodiment is as follows: the second-stage coal-feeding pipe inner pipe 1-2 on which the abrasion-resistant refractory material layer 4 is laid according to the present embodiment has the same inner diameter as the first-stage coal-feeding pipe inner pipe 1-1, described with reference to fig. 1. Namely, the inner diameter of the inner pipe 1-2 of the second section coal feeding pipe is larger than that of the inner pipe 1-1 of the first section coal feeding pipe, and the inner diameter of the inner pipe of the second section coal feeding pipe after the wear-resistant refractory material layer is paved on the inner wall of the inner pipe 1-2 of the second section coal feeding pipe is the same as that of the inner pipe of the second section coal feeding pipe.
As shown in fig. 4 and 6: the top end of the wear-resistant refractory material layer 4 is positioned between the lower end of the first section of coal feeding pipe inner pipe 1-1 and the upper end of the second section of coal feeding pipe inner pipe 1-2; the inner wall of the top end of the wear-resistant refractory material layer 4 is provided with a first clamping seat, and the part of the first section of coal feeding pipe inner pipe 1-1 extending out of the upper half section of coal feeding pipe outer pipe 2-1 is seated in the first clamping seat. Other components and connection modes are the same as in the first embodiment.
And a third specific embodiment: in the present embodiment, the part of the wear-resistant refractory layer 4 extending into the furnace 5 is thickened, as described in the present embodiment, with reference to fig. 1, 2, 4 and 6. To prevent deformation of the stainless steel tube near the furnace.
Other components and connection modes are the same as those of the first or second embodiment.
The specific embodiment IV is as follows: the abrasion-resistant refractory material layer 4 according to the present embodiment is integrally rolled with the second-stage coal pipe inner pipe 1-2, as described in the present embodiment with reference to fig. 4, 5, and 6.
As shown in fig. 5 and 6: the stainless steel plate is paved on the wear-resistant refractory material and is clamped on the second clamping seat at the lower end of the wear-resistant refractory material layer, the lining is made of the wear-resistant refractory material, the outer wall is made of the stainless steel plate in a rolling mode, during manufacturing, expansion difference between the lining and the stainless steel plate, temperature change and combination of the lining and the stainless steel plate are fully considered, and the wear resistance of the coal feeding port is improved by means of high strength and high wear resistance of the wear-resistant refractory material.
Other compositions and connection modes are the same as those of the first, second or third embodiments.
Fifth embodiment: referring to fig. 1 and 2, the coal feeding port device according to the present embodiment further includes a coal feeding air pipe, the coal feeding air pipe is located below the outer coal feeding pipe 2, an air outlet end of the coal feeding air pipe is inserted into the outer coal feeding pipe 2, the inner coal feeding pipe 1 and the wear-resistant refractory material layer 4, and a section of an air outlet end port of the coal feeding air pipe is level with a slope surface of the wear-resistant refractory material layer 4; the coal-sowing wind is conveyed into the coal-feeding mouth through the coal-sowing wind pipe, and the coal-sowing wind is introduced into the inner wall, so that the problems of overtemperature and deformation of the coal-feeding mouth are relieved to a certain extent.
Other compositions and connection modes are the same as any one of the first to fourth embodiments.
Specific embodiment six: referring to fig. 1 and 2, the embodiment is described with respect to the present embodiment, in which the included angle r between the air outlet end of the coal-feeding duct and the outer duct 2 is 30 degrees.
Other components and connection modes are the same as those of the fifth embodiment.
Seventh embodiment: the material of the abrasion-resistant refractory material layer 4 according to the present embodiment is silicon carbide. The inner pipe of the coal supply pipe, which is close to the hearth and stretches into the hearth, adopts an anti-abrasion pipe section with a special structure, is a silicon carbide composite pipe section, the inner lining of the inner pipe is made of silicon carbide abrasion-resistant materials, and the outer wall of the inner pipe is made of stainless steel plates; during manufacture, the expansion difference between the silicon carbide lining and the stainless steel plate, the temperature change and the combination of the silicon carbide lining and the stainless steel plate are fully considered, the high strength and the high wear resistance of the silicon carbide are utilized to improve the wear resistance of the coal feeding port, the silicon carbide material in the hearth is thickened, the stainless steel pipe is not arranged on the outer wall, the stainless steel outer pipe does not extend into the high-temperature hearth, the problem of deformation of the coal feeding port is solved, the coal feeding port pipe section extending into the hearth is formed by casting the wear-resistant material, the dense-phase area of the water-cooling wall is also laid with the wear-resistant refractory material, the linear expansion coefficients of the two materials are nearly identical, the thermal state operation has no expansion difference, and the longer operation period can be ensured.
Other compositions and connection modes are the same as any one of the first to fourth embodiments.
Eighth embodiment: the material of the abrasion-resistant refractory material layer 4 according to the present embodiment is silicon carbide. The inner pipe of the coal supply pipe, which is close to the hearth and stretches into the hearth, adopts an anti-abrasion pipe section with a special structure, is a silicon carbide composite pipe section, the inner lining of the inner pipe is made of silicon carbide abrasion-resistant materials, and the outer wall of the inner pipe is made of stainless steel plates; during manufacture, the expansion difference between the silicon carbide lining and the stainless steel plate, the temperature change and the combination of the silicon carbide lining and the stainless steel plate are fully considered, the high strength and the high wear resistance of the silicon carbide are utilized to improve the wear resistance of the coal feeding port, the silicon carbide material in the hearth is thickened, the stainless steel pipe is not arranged on the outer wall, the stainless steel outer pipe does not extend into the high-temperature hearth, the problem of deformation of the coal feeding port is solved, the coal feeding port pipe section extending into the hearth is formed by casting the wear-resistant material, the dense-phase area of the water-cooling wall is also laid with the wear-resistant refractory material, the linear expansion coefficients of the two materials are nearly identical, the thermal state operation has no expansion difference, and the longer operation period can be ensured.
Other components and connection modes are the same as those of the fifth embodiment.
Detailed description nine: the material of the abrasion-resistant refractory material layer 4 according to the present embodiment is silicon carbide. The inner pipe of the coal supply pipe, which is close to the hearth and stretches into the hearth, adopts an anti-abrasion pipe section with a special structure, is a silicon carbide composite pipe section, the inner lining of the inner pipe is made of silicon carbide abrasion-resistant materials, and the outer wall of the inner pipe is made of stainless steel plates; during manufacture, the expansion difference between the silicon carbide lining and the stainless steel plate, the temperature change and the combination of the silicon carbide lining and the stainless steel plate are fully considered, the high strength and the high wear resistance of the silicon carbide are utilized to improve the wear resistance of the coal feeding port, the silicon carbide material in the hearth is thickened, the stainless steel pipe is not arranged on the outer wall, the stainless steel outer pipe does not extend into the high-temperature hearth, the problem of deformation of the coal feeding port is solved, the coal feeding port pipe section extending into the hearth is formed by casting the wear-resistant material, the dense-phase area of the water-cooling wall is also laid with the wear-resistant refractory material, the linear expansion coefficients of the two materials are nearly identical, the thermal state operation has no expansion difference, and the longer operation period can be ensured.
Other components and connection modes are the same as those of the sixth embodiment.
Detailed description ten: in the embodiment, the length of the part of the abrasion-resistant refractory material layer 4 extending into the hearth is a, and a is 300mm or more and 400mm or less, as described in the embodiment with reference to FIG. 6.
Other compositions and connection manners are the same as those of the eighth or ninth embodiment.
The invention has the advantages of 1, simple structure, practicality and reliability. 2. The problems of abrasion, deformation, water wall pipe explosion and the like of the coal feeding port of the circulating fluidized bed boiler are effectively solved, and the safe, economical, efficient and stable operation of the unit is ensured. 3. The pipe section close to the hearth area adopts a lining silicon carbide and outer wall stainless steel plate structure, so that the abrasion resistance is improved, and the service life of the product is prolonged. 4. The pipe section structure which is close to the hearth area and stretches into the hearth area is integrally manufactured and formed, the site installation is convenient, and the installation period and the installation workload are effectively shortened. 5. The method can be used for the design of new engineering and the transformation of old engineering.
Claims (10)
1. The coal feeding port device for the circulating fluidized bed boiler comprises a coal feeding pipe inner pipe (1) and a coal feeding pipe outer pipe (2), wherein the coal feeding pipe outer pipe (2) is sleeved outside the coal feeding pipe inner pipe (1) and forms a gap between the coal feeding pipe inner pipe and the coal feeding pipe outer pipe; the lower ends of the coal feeding pipe inner pipe (1) and the coal feeding pipe outer pipe (2) are inserted into the hearth wall from the outside and are inclined downwards;
the method is characterized in that: the coal feeding pipe outer pipe (2) comprises an upper half coal feeding pipe outer pipe (2-1) and a lower half coal feeding pipe outer pipe (2-2); the inner diameter of the upper end of the outer tube (2-1) of the upper half coal feeding tube is smaller than that of the lower end, and the inner diameter of the outer tube (2-2) of the lower half coal feeding tube is the same as that of the lower end of the outer tube (2-1) of the upper half coal feeding tube; the coal feeding pipe inner pipe (1) comprises a first section of coal feeding pipe inner pipe (1-1) and a second section of coal feeding pipe inner pipe (1-2), the first section of coal feeding pipe inner pipe (1-1) is positioned in the upper half section of coal feeding pipe outer pipe (2-1), and the lower end of the first section of coal feeding pipe inner pipe (1-1) extends out of the pipe; the second section of coal feeding pipe inner pipe (1-2) is positioned in the lower half section of coal feeding pipe outer pipe (2-2);
a wear-resistant refractory material layer (4) is paved on the inner wall of the inner pipe (1-2) of the coal pipe in the second section; the part of the first section of coal feeding pipe inner pipe (1-1) extending out of the upper half section of coal feeding pipe outer pipe (2-1) is inserted into the upper end port of the second section of coal feeding pipe inner pipe (1-2); the lower end of the wear-resistant refractory material layer (4) extends out of the inner pipe (1-2) of the second section coal feeding pipe and is positioned in the hearth (5);
the upper half coal feeding pipe outer pipe (2-1) and the lower half coal feeding pipe outer pipe (2-2) are connected through a pair of flanges (3).
2. The coal seam allowance apparatus of claim 1, wherein: the inner diameter of the inner pipe (1-2) of the second section of the coal feeding pipe paved with the wear-resistant refractory material layer (4) is the same as that of the inner pipe (1-1) of the first section of the coal feeding pipe.
3. The coal seam allowance apparatus of claim 2, wherein: the part of the abrasion-resistant refractory material layer (4) extending into the hearth (5) is thickened.
4. A coal seam allowance apparatus according to claim 3, wherein: the abrasion-resistant refractory material layer (4) and the inner pipe (1-2) of the second section coal feeding pipe are integrally rolled.
5. The coal seam allowance device according to any one of claims 1 to 4, wherein: the coal feeding port device also comprises a coal feeding air pipe, wherein the coal feeding air pipe is positioned below the outer pipe (2) of the coal feeding pipe, and the air outlet end of the coal feeding air pipe is inserted into the outer pipe (2) of the coal feeding pipe, the inner pipe (1) of the coal feeding pipe and the wear-resistant refractory material layer (4), and the section of the air outlet end port of the coal feeding air pipe is flush with the slope surface of the wear-resistant refractory material layer (4).
6. The coal seam allowance device of claim 5, wherein: the included angle r between the air outlet end of the coal sowing air pipe and the outer pipe (2) of the coal feeding pipe is 30 degrees.
7. The coal seam allowance device according to any one of claims 1 to 4, wherein: the wear-resistant refractory material layer (4) is made of silicon carbide.
8. The coal seam allowance device of claim 5, wherein: the wear-resistant refractory material layer (4) is made of silicon carbide.
9. The coal seam allowance device of claim 6, wherein: the wear-resistant refractory material layer (4) is made of silicon carbide.
10. The coal seam allowance apparatus of claim 8 or 9, wherein: the length of the part of the wear-resistant refractory material layer (4) extending into the hearth is a, and a is more than or equal to 300mm and less than or equal to 400mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811149668.7A CN109185873B (en) | 2018-09-29 | 2018-09-29 | Coal feeding port device for circulating fluidized bed boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811149668.7A CN109185873B (en) | 2018-09-29 | 2018-09-29 | Coal feeding port device for circulating fluidized bed boiler |
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| CN109185873A CN109185873A (en) | 2019-01-11 |
| CN109185873B true CN109185873B (en) | 2023-12-12 |
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| CN201811149668.7A Active CN109185873B (en) | 2018-09-29 | 2018-09-29 | Coal feeding port device for circulating fluidized bed boiler |
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| CN106755673A (en) * | 2017-03-17 | 2017-05-31 | 中冶赛迪工程技术股份有限公司 | A kind of rotatable high furnace coal fines lance structure of shower nozzle |
| CN207407331U (en) * | 2017-10-17 | 2018-05-25 | 上海大屯能源股份有限公司 | A kind of Coal Feeding System for Circulating Fluidized Bed Combustion Boiler |
| CN208998065U (en) * | 2018-09-29 | 2019-06-18 | 哈尔滨锅炉厂有限责任公司 | A kind of coal feeding hole device for circulating fluidized bed boiler |
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