CN106196024A - Recirculating fluidized bed compound combustion system - Google Patents
Recirculating fluidized bed compound combustion system Download PDFInfo
- Publication number
- CN106196024A CN106196024A CN201610752114.0A CN201610752114A CN106196024A CN 106196024 A CN106196024 A CN 106196024A CN 201610752114 A CN201610752114 A CN 201610752114A CN 106196024 A CN106196024 A CN 106196024A
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- Prior art keywords
- fluidized bed
- pulverized coal
- circulating fluidized
- furnace
- conveying pipe
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 12
- 150000001875 compounds Chemical class 0.000 title abstract description 3
- 230000003134 recirculating effect Effects 0.000 title 1
- 239000003245 coal Substances 0.000 claims abstract description 77
- 239000002131 composite material Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- 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
- F23C10/02—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed
- F23C10/04—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone
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- 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
- F23C10/20—Inlets for fluidisation air, e.g. grids; Bottoms
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- 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
-
- 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
- F23C2206/00—Fluidised bed combustion
- F23C2206/10—Circulating fluidised bed
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
本发明公开了一种循环流化床复合燃烧系统，解决了循环流化床锅炉负荷响应速率慢的技术问题。包括循环流化床炉膛（1），在循环流化床炉膛（1）中设置有布风板（2），在循环流化床炉膛（1）的外侧壁上设置有返料器，在循环流化床炉膛（1）中设置有入炉煤料，在返料器的回料腿（3）上连接有煤粉输送管（4），煤粉输送管（4）的另一端与煤粉仓（5）连通，在煤粉仓（5）中设置有煤粉，在煤粉输送管（4）上连接有煤粉输送风管（6）；循环流化床锅炉的入炉煤料量与煤粉输送管（4）输送的煤粉量的比为9：1。提高了流化床锅炉的负荷响应能力。
The invention discloses a circulating fluidized bed compound combustion system, which solves the technical problem of slow load response rate of a circulating fluidized bed boiler. Including a circulating fluidized bed furnace (1), an air distribution plate (2) is arranged in the circulating fluidized bed furnace (1), and a return device is arranged on the outer wall of the circulating fluidized bed furnace (1), and in the circulation Furnace coal is set in the fluidized bed furnace (1), and the pulverized coal conveying pipe (4) is connected to the return leg (3) of the feeder, and the other end of the pulverized coal conveying pipe (4) is connected with the pulverized coal The bin (5) is connected, and pulverized coal is set in the pulverized coal bin (5), and the pulverized coal conveying pipe (6) is connected to the pulverized coal conveying pipe (4); the amount of coal fed into the circulating fluidized bed boiler The ratio of the amount of pulverized coal transported by the pulverized coal delivery pipe (4) is 9:1. The load response capability of the fluidized bed boiler is improved.
Description
技术领域technical field
本发明涉及一种用于火力发电的循环流化床，特别涉及一种循环流化床的燃烧系统。The invention relates to a circulating fluidized bed used for thermal power generation, in particular to a combustion system of the circulating fluidized bed.
背景技术Background technique
目前，公知的火力发电厂所使用的循环流化床锅炉负荷响应速率都比较慢，很难对电网自动功率控制系统（AGC）做出快速响应，原因是循环流化床锅炉入炉煤的粒径较煤粉炉入炉煤的粒径偏大，燃烧释放热能较慢，热负荷响应速度滞后。随着智能电网的普及和流化床锅炉发电在电网中份额的增加，流化床机组参与电网调峰的占比越来越大，流化床锅炉对电网负荷作出快速响应的缺陷日益凸显。At present, the load response rate of circulating fluidized bed boilers used in known thermal power plants is relatively slow, and it is difficult to make a quick response to the automatic power control system (AGC) of the grid. Compared with the particle size of the coal fed into the pulverized coal furnace, the particle size is larger, the heat energy released by combustion is slower, and the heat load response speed lags behind. With the popularization of smart grid and the increasing share of fluidized bed boiler power generation in the grid, the proportion of fluidized bed units participating in grid peak regulation is increasing, and the defects of fluidized bed boilers' rapid response to grid load have become increasingly prominent.
发明内容Contents of the invention
本发明提供了一种循环流化床复合燃烧系统，解决了循环流化床锅炉负荷响应速率慢的技术问题。The invention provides a circulating fluidized bed compound combustion system, which solves the technical problem of slow load response rate of the circulating fluidized bed boiler.
本发明是通过以下技术方案解决以上技术问题的：The present invention solves the above technical problems through the following technical solutions:
一种循环流化床复合燃烧系统，包括循环流化床炉膛，在循环流化床炉膛中设置有布风板，在循环流化床炉膛的外侧壁上设置有返料器，在循环流化床炉膛中设置有入炉煤料，在返料器的回料腿上连接有煤粉输送管，煤粉输送管的另一端与煤粉仓连通，在煤粉仓中设置有煤粉，在煤粉输送管上连接有煤粉输送风管；循环流化床锅炉的入炉煤料量与煤粉输送管输送的煤粉量的比为9：1。A circulating fluidized bed composite combustion system, comprising a circulating fluidized bed furnace, an air distribution plate is arranged in the circulating fluidized bed furnace, a return device is arranged on the outer wall of the circulating fluidized bed furnace, Furnace coal is set in the hearth of the bed, and a pulverized coal conveying pipe is connected to the return leg of the feeder. The pulverized coal conveying pipe is connected with a pulverized coal conveying air pipe; the ratio of the amount of coal fed into the circulating fluidized bed boiler to the amount of pulverized coal conveyed by the pulverized coal conveying pipe is 9:1.
一种循环流化床复合燃烧系统，包括循环流化床炉膛，在循环流化床炉膛中设置有布风板，在循环流化床炉膛的外侧壁上设置有二次风管，在循环流化床炉膛中设置有入炉煤料，在二次风管上连接有煤粉输送管，煤粉输送管的另一端与煤粉仓连通，在煤粉仓中设置有煤粉，在煤粉输送管上连接有煤粉输送风管；循环流化床锅炉的入炉煤料量与煤粉输送管输送的煤粉量的比为9：1。A circulating fluidized bed composite combustion system, comprising a circulating fluidized bed furnace, an air distribution plate is arranged in the circulating fluidized bed furnace, a secondary air pipe is arranged on the outer wall of the circulating fluidized bed furnace, Furnace coal is set in the chemical bed furnace, and a pulverized coal conveying pipe is connected to the secondary air duct. The pulverized coal conveying air pipe is connected to the conveying pipe; the ratio of the amount of coal fed into the circulating fluidized bed boiler to the amount of pulverized coal conveyed by the pulverized coal conveying pipe is 9:1.
本发明通过从返料器回料腿给炉膛加入煤粉或在二次风管上加入煤粉，提高了流化床锅炉的负荷响应能力。The invention improves the load response capability of the fluidized bed boiler by adding coal powder to the furnace from the return leg of the feeder or adding coal powder to the secondary air pipe.
附图说明Description of drawings
图1是本发明在回料腿3上连接有煤粉输送管4的结构示意图。Fig. 1 is a structural schematic view of the present invention in which a pulverized coal conveying pipe 4 is connected to a return leg 3.
具体实施方式detailed description
下面结合附图对本发明进行详细说明：The present invention is described in detail below in conjunction with accompanying drawing:
一种循环流化床复合燃烧系统，包括循环流化床炉膛1，在循环流化床炉膛1中设置有布风板2，在循环流化床炉膛1的外侧壁上设置有返料器，在循环流化床炉膛1中设置有入炉煤料，在返料器的回料腿3上连接有煤粉输送管4，煤粉输送管4的另一端与煤粉仓5连通，在煤粉仓5中设置有煤粉，在煤粉输送管4上连接有煤粉输送风管6；循环流化床锅炉的入炉煤料与煤粉输送管4输送的煤粉量的比为9：1。A circulating fluidized bed composite combustion system, comprising a circulating fluidized bed furnace 1, an air distribution plate 2 is arranged in the circulating fluidized bed furnace 1, and a feeder is arranged on the outer wall of the circulating fluidized bed furnace 1, In the circulating fluidized bed furnace 1, the furnace coal material is set, and the pulverized coal conveying pipe 4 is connected on the return leg 3 of the feeder, and the other end of the pulverized coal conveying pipe 4 communicates with the pulverized coal bin 5. Pulverized coal is arranged in the powder bin 5, and the pulverized coal conveying air pipe 6 is connected to the pulverized coal conveying pipe 4; :1.
一种循环流化床复合燃烧系统，包括循环流化床炉膛1，在循环流化床炉膛1中设置有布风板2，在循环流化床炉膛1的外侧壁上设置有二次风管，在循环流化床炉膛1中设置有入炉煤料，在二次风管上连接有煤粉输送管4，煤粉输送管4的另一端与煤粉仓5连通，在煤粉仓5中设置有煤粉，在煤粉输送管4上连接有煤粉输送风管6；循环流化床锅炉的入炉煤料与煤粉输送管4输送的煤粉量的比为9：1。A circulating fluidized bed composite combustion system, comprising a circulating fluidized bed furnace 1, an air distribution plate 2 is arranged in the circulating fluidized bed furnace 1, and a secondary air duct is arranged on the outer wall of the circulating fluidized bed furnace 1 , the circulating fluidized bed furnace 1 is provided with the furnace coal, the secondary air pipe is connected with a pulverized coal delivery pipe 4, and the other end of the pulverized coal delivery pipe 4 communicates with the pulverized coal bin 5, and the pulverized coal bin 5 There is pulverized coal in the middle, and the pulverized coal conveying pipe 4 is connected with the pulverized coal conveying air pipe 6; the ratio of the coal feed into the furnace of the circulating fluidized bed boiler to the pulverized coal conveyed by the pulverized coal conveying pipe 4 is 9:1.
循环流化床炉膛1下部是布风板2，在返料器的回料腿3上设置有煤粉输送管4，煤粉输送管4一端和煤粉仓5连接，另一端和回料腿3连接。煤粉输送风管6和煤粉输送管4连接，煤粉通过压缩空气、一次风或者高压流化风输送到回料腿3，最后进入循环流化床炉膛1燃烧。煤粉管和输送风管的相关尺寸通过煤粉量和风量等参数计算。由于回料腿3进入的煤粉比给煤机给煤细度细，着火燃烧迅速，所以能够提高循环流化床的负荷响应速率。The lower part of the circulating fluidized bed furnace 1 is the air distribution plate 2, and the pulverized coal delivery pipe 4 is arranged on the return leg 3 of the feeder. One end of the pulverized coal delivery pipe 4 is connected to the pulverized coal bin 5, and the other end is connected to the return leg 3 connections. The pulverized coal conveying air pipe 6 is connected with the pulverized coal conveying pipe 4, and the pulverized coal is conveyed to the return leg 3 through compressed air, primary air or high-pressure fluidized air, and finally enters the circulating fluidized bed furnace 1 for combustion. The relevant dimensions of the pulverized coal pipe and the conveying air pipe are calculated by parameters such as pulverized coal volume and air volume. Since the fineness of the pulverized coal entered by the return leg 3 is finer than that fed by the coal feeder, it can be ignited and burned quickly, so the load response rate of the circulating fluidized bed can be improved.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610752114.0A CN106196024A (en) | 2016-08-30 | 2016-08-30 | Recirculating fluidized bed compound combustion system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610752114.0A CN106196024A (en) | 2016-08-30 | 2016-08-30 | Recirculating fluidized bed compound combustion system |
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| CN106196024A true CN106196024A (en) | 2016-12-07 |
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| CN201610752114.0A Pending CN106196024A (en) | 2016-08-30 | 2016-08-30 | Recirculating fluidized bed compound combustion system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118328379A (en) * | 2024-06-12 | 2024-07-12 | 怀柔实验室山西研究院 | Powder feeding system and circulating fluidized bed boiler |
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| CN2527866Y (en) * | 2002-03-18 | 2002-12-25 | 何相助 | Composite circulating fluidized bed boiler |
| US20040261675A1 (en) * | 2001-05-11 | 2004-12-30 | Pauli Dernjatin | Combined fluidized bed and pulverized coal combustion method |
| CN104807004A (en) * | 2015-04-15 | 2015-07-29 | 华南理工大学 | Rough and fine coal powder separating and combusting device in coal powder pipe |
| CN104879748A (en) * | 2015-04-16 | 2015-09-02 | 哈尔滨工业大学 | Device and method for controlling NOx in circulating fluidized bed coupled with air staging and fuel staging |
| CN205299497U (en) * | 2015-11-25 | 2016-06-08 | 东方电气集团东方锅炉股份有限公司 | Hierarchical sorting combustion system of circulating fluidized bed fuel thickness |
| CN205979744U (en) * | 2016-08-30 | 2017-02-22 | 国网山西省电力公司电力科学研究院 | Circulating fluidized bed combined combustion system |
-
2016
- 2016-08-30 CN CN201610752114.0A patent/CN106196024A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040261675A1 (en) * | 2001-05-11 | 2004-12-30 | Pauli Dernjatin | Combined fluidized bed and pulverized coal combustion method |
| CN2527866Y (en) * | 2002-03-18 | 2002-12-25 | 何相助 | Composite circulating fluidized bed boiler |
| CN104807004A (en) * | 2015-04-15 | 2015-07-29 | 华南理工大学 | Rough and fine coal powder separating and combusting device in coal powder pipe |
| CN104879748A (en) * | 2015-04-16 | 2015-09-02 | 哈尔滨工业大学 | Device and method for controlling NOx in circulating fluidized bed coupled with air staging and fuel staging |
| CN205299497U (en) * | 2015-11-25 | 2016-06-08 | 东方电气集团东方锅炉股份有限公司 | Hierarchical sorting combustion system of circulating fluidized bed fuel thickness |
| CN205979744U (en) * | 2016-08-30 | 2017-02-22 | 国网山西省电力公司电力科学研究院 | Circulating fluidized bed combined combustion system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118328379A (en) * | 2024-06-12 | 2024-07-12 | 怀柔实验室山西研究院 | Powder feeding system and circulating fluidized bed boiler |
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