CN101210690A - Generation furnace gas ignition device - Google Patents
Generation furnace gas ignition device Download PDFInfo
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- CN101210690A CN101210690A CNA2006101600130A CN200610160013A CN101210690A CN 101210690 A CN101210690 A CN 101210690A CN A2006101600130 A CNA2006101600130 A CN A2006101600130A CN 200610160013 A CN200610160013 A CN 200610160013A CN 101210690 A CN101210690 A CN 101210690A
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- Prior art keywords
- coal
- burner
- tube
- igniter
- coal dust
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Abstract
The invention discloses a generator gas ignition device which comprises an igniter, a coal unit and a pre-combustion chamber. The coal unit comprises a coal hopper and an injector. The exit of the coal hopper is communicated with the injector which is provided thereon with a compressed air pipe and a coal gas pipe is communicated with the pre-combustion chamber. The igniter comprises a shrinkage tube, a mixing tube, an expansible tube and a burner nozzle, which are connected in order. A fire port is provided at the other side of the burner nozzle. A coal gas nozzle is arranged at the end of the shrinkage tube and another compressed air pipe is also arranged at the end of the shrinkage tube. The inventive generator gas ignition device works based on the characteristics of generator gas and in a mode of forced premix combustion; firstly the coal is burned in the pre-combustion chamber and kept in stable combustion, then a hearth is heated by the sprayed coal flare, and finally the main coal stream in the boiler is burned. As a result, the coal pre-combustion chamber is used to replace the prior oil gun, thereby reducing oil consumption.
Description
Technical field
The invention belongs to igniter, relate in particular to a kind of producer gas igniter.
Background technology
The pulverized-coal fired boiler of the present power plant of China is all lighted a fire with oil basically or is combustion-supporting.When firing with oil drop, generally be burner hearth to be burnt heat,, be in operation to guarantee coal dust smooth combustion when spraying into burner hearth with oil, because the variation of load, therefore the potentially unstable that burns under underload needs with oil combustion-supportingly, and this sparking mode oil consumption is very big, whole nation station boiler ignition oil is more than 500,000 t/, combustion-supporting bigger with oilconsumption, along with the day of energy supply is becoming tight, replace oil with coal has become one of important measures that solve energy problem.China's coal resource is abundant, and raw coal output occupies the No. 1 in the world, and following China energy resource structure form is still based on coal.Along with the development of coal clean combustion technology, the gas generator technology is also increasingly mature, and producer gas is because manufacturing process is simple, and equipment investment is few, and the burning low cost and other advantages is used widely in industrial and agricultural production.
Summary of the invention
The purpose of this invention is to provide a kind of producer gas igniter,, improve environment, save fuel consume with the range of application of further expansion producer gas.
For achieving the above object, the present invention adopts following technical scheme: a kind of producer gas igniter, comprise igniter, coal dust device and precombustion chamber, coal dust device comprises coal dust bucket and injector, the outlet of coal dust bucket communicates with injector, compressed air hose and coal dust streamtube are arranged on the injector, coal dust streamtube communicates with precombustion chamber, igniter comprises collapsible tube, mixing tube, convergent divergent channel and the burner that links to each other successively, the other end of burner has bocca, there is jet for gas the end of collapsible tube, and the end of collapsible tube also has another compressed air hose.
In the exit of coal dust bucket the line cage is housed.
Collapsible tube, convergent divergent channel and burner all are cone, and mixing tube is a cylinder, and the ratio of the sectional area of mixing tube and the sectional area of jet for gas is between 3～3.5, and the ratio of the area of burner end and mixing tube sectional area is between 1.2～1.5.
Described collapsible tube, convergent divergent channel and burner all are cone, and mixing tube is a cylinder, and the tapering of collapsible tube is 40～45 degree, and the tapering of convergent divergent channel is 8～10 degree, and the tapering of burner is 12～15 degree.
This producer gas igniter, characteristic according to producer gas, adopt mandatory premixture formula combustion system, firing coal-dust is air stream and makes it smooth combustion in precombustion chamber earlier, remove the main pulverized coal flow of heating furnace and maximal end point combusting boiler again by ejection coal dust torch, replace oil gun with the coal dust precombustion chamber like this, thereby reached the fuel-economizing purpose.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the structural representation of igniter.
The specific embodiment
Producer gas igniter as shown in Figure 1 comprises igniter 8, coal dust device and precombustion chamber 9, and coal dust device comprises coal dust bucket 2 and injector 4, and the outlet of coal dust bucket communicates with injector, in the exit of coal dust bucket line cage 3 is housed, and line cage 3 links to each other with motor 6.Be connected to compressed air hose 1 and coal dust streamtube 5 on the injector, coal dust streamtube 5 communicates with precombustion chamber 9, as shown in Figure 2, igniter comprises collapsible tube 12, mixing tube 13, convergent divergent channel 14 and the burner 15 that links to each other successively, the other end of burner has bocca 16, there is jet for gas 11 end of collapsible tube, and the end of collapsible tube is connected to another compressed air hose 10.
The course of work of the present invention is: producer gas and compressed air is premix and burning in igniter, the torch of ejection removes to light the breeze airflow of being drawn by injector in precombustion chamber, after treating certain hour, the coal dust precombustion chamber enters steady operational status, with the main pulverized coal flow in the combusting boiler, after entering stable operation, the main pulverized coal flow in the boiler can cut off igniting pre-burning device, if boiler load instability starting ignition system is at any time regulated.
The inventor use this igniter on the DG130/39/450-M station boiler two exert oneself to carrying out fire trial in the 0.18kg/s coal dust precombustion chamber, be the data statistics of battery of tests below: test is divided into 7 kinds of operating modes, each working condition tests three times, and all obtained the success in the igniting, the design parameter of burner sees Table 1 in the test, select for use the important technological parameters of gas to see Table 2, result of the test sees Table 3:
Table 1 burner each several part design size
Annotate: d
i---nozzle diameter l
r---nozzle length 0---taper half-angle F
1---the mixing tube sectional area compares d with the best area of the cross-section area of nozzle
C---mixed tube diameter l
C---the mixing tube length l
A---the convergent divergent channel length l
K---collapsible tube length β
K---the collapsible tube angle beta
A---convergent divergent channel subtended angle d
K---the diameter d of collapsible tube left side
A---the thickest diameter F of convergent divergent channel
2---the long-pending best area with the mixing tube sectional area of burner end cross-sectional compares d
Hr---burner nozzle diameter β
Hr---the angle of throat l of burner
Hr---burner length
The character of table 2 producer gas and flammability
The result of the test of table 3 producer gas igniter
Test shows, this igniter has advantages such as flame temperature height, adaptability be strong, easy to operate.Compared with lighting with oil gun in the past, prespark period obviously shortens, and cost reduces greatly.
Claims (4)
1. producer gas igniter, it is characterized in that: comprise igniter, coal dust device and precombustion chamber, coal dust device comprises coal dust bucket and injector, the outlet of coal dust bucket communicates with injector, and compressed air hose and coal dust streamtube are arranged on the injector, and coal dust streamtube communicates with precombustion chamber, igniter comprises collapsible tube, mixing tube, convergent divergent channel and the burner that links to each other successively, the other end of burner has bocca, and there is jet for gas the end of collapsible tube, and the end of collapsible tube also has another compressed air hose.
2. producer gas igniter as claimed in claim 1 is characterized in that: in the exit of coal dust bucket the line cage is housed.
3. producer gas igniter as claimed in claim 1 or 2, it is characterized in that: collapsible tube, convergent divergent channel and burner all are cone, mixing tube is a cylinder, the ratio of the sectional area of mixing tube and the sectional area of jet for gas is between 3～3.5, and the ratio of the area of burner end and mixing tube sectional area is between 1.2～1.5.
4. producer gas igniter as claimed in claim 3, it is characterized in that: described collapsible tube, convergent divergent channel and burner all are cone, and mixing tube is a cylinder, and the tapering of collapsible tube is 40～45 degree, the tapering of convergent divergent channel is 8～10 degree, and the tapering of burner is 12～15 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101600130A CN101210690A (en) | 2006-12-29 | 2006-12-29 | Generation furnace gas ignition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101600130A CN101210690A (en) | 2006-12-29 | 2006-12-29 | Generation furnace gas ignition device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101210690A true CN101210690A (en) | 2008-07-02 |
Family
ID=39610885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101600130A Pending CN101210690A (en) | 2006-12-29 | 2006-12-29 | Generation furnace gas ignition device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101210690A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101846313A (en) * | 2010-06-13 | 2010-09-29 | 山西蓝天环保设备有限公司 | Coal dust industrial boiler having prechamber and taking high-quality coal dust as auxiliary fuel |
| CN111076215A (en) * | 2019-12-11 | 2020-04-28 | 上海齐耀热能工程有限公司 | Ground ignition device for petrochemical torch system |
-
2006
- 2006-12-29 CN CNA2006101600130A patent/CN101210690A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101846313A (en) * | 2010-06-13 | 2010-09-29 | 山西蓝天环保设备有限公司 | Coal dust industrial boiler having prechamber and taking high-quality coal dust as auxiliary fuel |
| CN111076215A (en) * | 2019-12-11 | 2020-04-28 | 上海齐耀热能工程有限公司 | Ground ignition device for petrochemical torch system |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20080702 |