CN203869025U - Ignition device under pure coal slime fluidized bed boiler - Google Patents
Ignition device under pure coal slime fluidized bed boiler Download PDFInfo
- Publication number
- CN203869025U CN203869025U CN201420223206.6U CN201420223206U CN203869025U CN 203869025 U CN203869025 U CN 203869025U CN 201420223206 U CN201420223206 U CN 201420223206U CN 203869025 U CN203869025 U CN 203869025U
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- CN
- China
- Prior art keywords
- air duct
- ignition device
- central tube
- secondary air
- ignition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses an ignition device under a pure slime fluidized bed boiler. The ignition device consists of a central tube, a primary air duct, a secondary air duct, an oil gun and an ignition electrode, wherein the oil gun and the ignition electrode are mounted in the central tube; a flame holder is mounted at the front end of the primary air duct; a movable impeller is mounted in the secondary air duct; the primary air duct and the central tube are sequentially mounted in the secondary air duct, and the front ends of the primary air duct and the central tube contract inwards; the air volumes of the primary air duct and the secondary air duct are respectively 30-40% and 60-70%. The ignition device is mounted at the inlet end of a bed air duct, and during ignition, the oil gun and the ignition electrode automatically extend out of the central tube to spray fuel oil for ignition. The fuel oil is burnt in the air duct. Compared with a conventional ignition device under a bed, as a pre-ignition chamber is omitted, the heat load in the burning area is greatly reduced, coking is avoided, even the ignition device is prevented from being burnt out, and the service life of the ignition device is prolonged.
Description
Technical field
The utility model relates to a kind of bottom ignition device, particularly about a kind of be suitable for using in pure coal slime fluidized bed boiler there is steady combustion, low NO
xthe bottom ignition device of discharge and long test life.
Technical background
The advantage such as fuel tolerance is wide, efficiency of combustion is high, discharged nitrous oxides is low owing to having for CFBB, can realize desulfuration in furnace, load regulation rate is large and Load Regulation is fast, in the whole world be domesticly all widely used.At present, overwhelming majority fluidized-bed combustion boiler has all been taked the Starting mode of ignition under bed, at boiler bottom, air distribution plate is set, air compartment and air channel are set under air distribution plate, igniter is lighted a fire in air channel or in air compartment, hot flue gas, by being arranged on the blast cap on air distribution plate, makes bed material fluidisation and intensification, thereby realizes the startup of boiler.It is high that ignition under bed mode has heat utilization efficiency, safely, simply and efficiently feature.But the most of pre-combustion chamber that adopts of bottom ignition device in the past, igniter fuel first burns in igniter inner combustion chamber, and the hot flue gas that burning forms sprays from combustion chamber, enters air channel or air compartment, then heating boiler air intake.This structure makes the thermic load of igniter combustion chamber very large, and easily coking, even burns out igniter, affects safe, long-term, the stable operation of boiler.
Summary of the invention
A kind of pure coal combustion fluidized-bed combustion boiler, adopts the lower light diesel fuel method of ignition and starting up of bed.The utility model is for the deficiencies in the prior art, and a kind of bottom ignition device that opens short, failure rate is low of stove time, long service life is provided.
For achieving the above object, the utility model is taked following technical scheme:
A kind of pure coal slime fluidized bed boiler bottom ignition device, secondary air channel, airduct, central tube, oil gun and an ignitor, it is characterized in that described oil gun and ignitor are installed in central tube, a described airduct front end is equipped with flame holder, and movable impeller is housed in secondary air channel; The front end exit of described secondary air channel, airduct and central tube is in air channel.
The pure coal slime fluidized bed boiler bottom ignition device of one of the present utility model, it has the following advantages:
1. the utility model is owing to having cancelled combustion chamber, and fuel oil is lighted directly and burnt in air channel by ignitor after oil gun ejection, and combustion zone volume is large, thermic load is low, is difficult for coking, has also avoided igniter to be burned.
2. the utility model is owing to adopting staged air distribution, and combustion zone thermic load is low, and flame kernel temperature is low, can effectively reduce NO
xgeneration, realize low NO
xdischarge, meets environmental requirement.
As further improvement of the utility model, for realizing fractional combustion, reasonable wind distribution, a wind accounts for the 30%-40% of total blast volume, and Secondary Air accounts for the 60%-70% of total blast volume.
Further improve as of the present utility model, described central tube and an airduct are slightly recessed in secondary air channel, to improve the service life of igniter again.
Further improve again as of the present utility model, movable impeller is housed in described secondary air channel, make Secondary Air be eddy flow state and send, and swirl strength is adjustable, realize length and diameter adjustment to flame, ensure flame degree of filling number and do not touch wall in air channel.
Further improve as of the present utility model, described light oil rifle and ignitor can be realized automatic ignition by programme-control again.
Further improve as of the present utility model, described light oil rifle and ignitor can be realized automatic entrance-exit by programme-control, auto-extending when igniting; Rear being automatically retracted in burner central tube of having lighted a fire.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
In figure: 1, secondary air channel, 2, an airduct, 3, central tube, 4, movable impeller, 5, oil gun, 6, ignitor, 7, flame holder, 8, air channel.
Detailed description of the invention
In order to describe structure of the present utility model and feature in detail, the following preferred embodiment of existing act also coordinates accompanying drawing to describe.
As shown in Figure 1, the pure coal slime fluidized bed boiler bottom ignition device of one of the present utility model, comprise secondary air channel 1, airduct 2, central tube 3, oil gun 5 and an ignitor 6, it is characterized in that described oil gun 5 and ignitor 6 are installed in central tube 3, described airduct 2 front ends are equipped with flame holder 7, and movable impeller 4 is housed in secondary air channel 1; The front end exit of described secondary air channel 1, airduct 2 and central tube 3 is in air channel 8.
Described central tube 3 and airduct 2 front ends are slightly recessed in described secondary air channel 1.
Movable impeller 4 is housed in described secondary air channel 1, to regulate the swirl strength of Secondary Air, thereby realizes the adjusting of flame profile.
Described light oil rifle 5 and ignitor 6 are realized automatic ignition by programme-control.
Described light oil rifle 5 and ignitor 6 are realized automatic entrance-exit by programme-control, auto-extending when igniting, rear being automatically retracted in burner central tube 3 of having lighted a fire.
The course of work of the present utility model is as follows:
First open boiler induced-draft fan and air blast and carry out prepurge, regulate blower fan to the combustion chamber draft requiring.Start oil pump and high-energy igniter (in Fig. 1 for illustrating), fuel oil is sprayed through the oil nozzle of oil gun 5, and lighted by ignitor 6.In the time starting oil pump and high-energy igniter, oil gun 5 and ignitor 6 are stretched out automatically by programme-control from central tube.After fuel oil is lighted, ignitor returns in central tube, prevents from being burned.After flame stabilization, strengthen fuel delivery, make igniter reach nominal output, regulate movable impeller 4 simultaneously, make the length of flame and diameter suitable.In the time that bed material temperature degree reaches 800 DEG C, the boiler startup that fed intake, igniter can be shut down, and oil pump stops oil, and oil gun also returns in central tube automatically.
Should be understood that: above-described embodiment is just to explanation of the present utility model, instead of to restriction of the present utility model, any utility model not exceeding within the scope of the utility model connotation is created, within all falling into protection domain of the present utility model.
Claims (5)
1. a pure coal slime fluidized bed boiler bottom ignition device, comprise secondary air channel (1), an airduct (2), central tube (3), oil gun (5) and ignitor (6), it is characterized in that described oil gun (5) and ignitor (6) are installed in central tube (3), a described airduct (2) front end is equipped with flame holder (7), and movable impeller (4) is housed in secondary air channel (1); The front end exit of described secondary air channel (1), an airduct (2) and central tube (3) is in air channel (8).
2. the pure coal slime fluidized bed boiler bottom ignition device of one as claimed in claim 1, is characterized in that described central tube (3) and an airduct (2) front end are slightly recessed in described secondary air channel (1).
3. the pure coal slime fluidized bed boiler bottom ignition device of one as claimed in claim 1, it is characterized in that, in described secondary air channel (1), movable impeller (4) is housed, to regulate the swirl strength of Secondary Air, thereby realize the adjusting of flame profile.
4. the pure coal slime fluidized bed boiler bottom ignition device of one as claimed in claim 1, light oil rifle (5) and ignitor (6) described in it is characterized in that are realized automatic ignition by programme-control.
5. as the one pure coal slime fluidized bed boiler bottom ignition device of claim 1-4 as described in any one, it is characterized in that described light oil rifle (5) and ignitor (6) realize automatic entrance-exit by programme-control, auto-extending when igniting, rear being automatically retracted in burner central tube (3) of having lighted a fire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420223206.6U CN203869025U (en) | 2014-04-30 | 2014-04-30 | Ignition device under pure coal slime fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420223206.6U CN203869025U (en) | 2014-04-30 | 2014-04-30 | Ignition device under pure coal slime fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203869025U true CN203869025U (en) | 2014-10-08 |
Family
ID=51649971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420223206.6U Expired - Fee Related CN203869025U (en) | 2014-04-30 | 2014-04-30 | Ignition device under pure coal slime fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203869025U (en) |
-
2014
- 2014-04-30 CN CN201420223206.6U patent/CN203869025U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Hangzhou City, Zhejiang province 311115 Pingyao Town, Yuhang District of Guangzhou Road No. 1 Patentee after: Hangzhou environmental protection Polytron Technologies Inc Address before: Hangzhou City, Zhejiang province 311115 Pingyao Town, Yuhang District of Guangzhou Road No. 1 Patentee before: Hangzhou Juneng Boiler Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141008 Termination date: 20200430 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |