CN203731464U - High-concentration pulverized coal mixed injection device - Google Patents
High-concentration pulverized coal mixed injection device Download PDFInfo
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- CN203731464U CN203731464U CN201320816332.8U CN201320816332U CN203731464U CN 203731464 U CN203731464 U CN 203731464U CN 201320816332 U CN201320816332 U CN 201320816332U CN 203731464 U CN203731464 U CN 203731464U
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- pulverized coal
- coal
- injection device
- mixed injection
- ignition
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Abstract
The utility model relates to a high-concentration pulverized coal mixed injection device, and belongs to the technical field of pulverized coal combustion of an industrial boiler. According to the high-concentration pulverized coal mixed injection device, a Roots blower is used for conveying pulverized coal, and the pulverized coal and primary air are made to be thoroughly mixed. According to the technical scheme, a pulverized coal conveying pipe connected with a coal bunker is arranged in a primary air pipe, and the Roots blower is arranged on the pulverized coal conveying pipe. The high-concentration pulverized coal mixed injection device is simple in structure, convenient to use and capable of being widely applied to the industrial boiler.
Description
Technical field
The utility model relates to a kind of high concentration pulverized coal mixing injection device, belongs to Industrial Boiler coal powder burning technology field.
Background technology
The low-volatile coal resources such as China's meager coal, anthracite are extremely abundant, but these coal voidages are low, and dilation is high, and ignition temperature and the ignition heat of coal are high, therefore are extremely difficult for catching fire and after-flame, and peaking operation is very difficult.For high-ash soft coal, in coal, ash content is a lot, need to absorb more heat, and the caloric value of ash coal is low, so the ignition heat of breeze airflow is high, the difficulty of catching fire.Ignition lag and ignition speed reduce making temperature in stove reduce and can be used for the time shorten of after-flame coke, will cause coke after-flame difficulty, the problems such as unburned carbon in flue dust increase.Therefore for low-volatite coal and the bad bituminous coal of high ash content, strengthening is caught fire, and finds a kind of combustion system of efficient steady combustion, is the key that solves difficult fired coal combustion problem.
The measure that strengthening is caught fire has a lot, though there is certain effect, all has some limitations.As, improving fineness of pulverized coal can affect powder process power consumption; Lay wall with refractory lining, refracto and improve furnace temperature, may cause slagging scorification; Improve a wind-warm syndrome and can reduce ignition heat, make to catch fire ahead of time, but because wind-warm syndrome is still far below breeze airflow ignition temperature and flue-gas temperature, therefore breeze airflow is caught fire and can not play conclusive effect.
Utility model content
The utility model overcomes the deficiency that prior art exists, and technical problem to be solved has been to provide a kind of roots blower pulverized coal conveying that utilizes, and makes coal dust and the well-mixed high concentration pulverized coal mixing of a wind injection device.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: high concentration pulverized coal mixing injection device, comprise: an airduct, in a described airduct, be provided with the coal dust carrier pipe being connected with coal bunker, on described coal dust carrier pipe, be provided with roots blower.
The outlet of described coal dust carrier pipe extends to the exit of an airduct.
The beneficial effect that the utility model compared with prior art had is: the utility model employing roots blower is advertised pulverized coal conveying and mixed with an air intake, make it form the relatively rare primary wind and powder air-flow of coal powder density, deliver to burner, mix and burn with Secondary Air, can accelerate chemical reaction velocity like this, reduce ignition temperature and ignition heat, reduce ignition time, shorten ignition distance, change ignition mode, improve flame propagation velocity and flame temperature, fully guarantee the smooth combustion of low-volatile coal and high ash content colm; The ignition mode of breeze airflow is transitioned into homogeneous ignition gradually by heterogeneous catching fire simultaneously, makes O
2relative concentration reduces, and effectively reduces NO
xgrowing amount; And the outlet of coal dust carrier pipe extends to a wind tube outlet place dilution and mixes, and effectively prevents coal after-flame problem and Boiler Furnace slagging problem.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Fig. 1 is structural representation of the present utility model.
In figure: 1 is an airduct, and 2 is coal dust carrier pipe, and 3 is roots blower.
The specific embodiment
As shown in Figure 1, high concentration pulverized coal mixing injection device, comprising: an airduct 1, is characterized in that: in a described airduct 1, be provided with the coal dust carrier pipe 2 being connected with coal bunker, on described coal dust carrier pipe 2, be provided with roots blower 3.
The outlet of described coal dust carrier pipe 2 extends to the exit of an airduct 1.
The utility model adopts roots blower 3 as independent air source, by coal dust carrier pipe 2 pulverized coal conveyings, coal dust is mixed with a wind, coal dust carrier pipe 2 is general much thinner than an airduct, by roots blower 3 pulverized coal conveyings, make the concentration of coal dust in coal dust carrier pipe 2 reach 1.5-2kg/kg air, thereby form high concentration pulverized coal air-flow and inject an airduct 1, mix with a wind, now coal powder density is diluted to 0.8-0.9kg/kg air, form the relatively rare primary wind and powder air-flow of coal powder density, deliver to burner, mix and burn with Secondary Air.The mode that adopts this injection to mix, make high concentration pulverized coal dilute mixing, can accelerate chemical reaction velocity, reduce ignition temperature and ignition heat, reduce ignition time, shorten ignition distance, change ignition mode, improve flame propagation velocity and flame temperature, fully guarantee the smooth combustion of low-volatile coal and high ash content colm; The ignition mode of breeze airflow is transitioned into homogeneous ignition gradually by heterogeneous catching fire simultaneously, makes O
2relative concentration reduces, and effectively reduces NO
xgrowing amount; And the outlet of coal dust carrier pipe extends to a wind tube outlet place dilution and mixes, and effectively prevents coal after-flame problem and Boiler Furnace slagging problem.
By reference to the accompanying drawings embodiment of the present utility model is explained in detail above; but the utility model is not limited to above-described embodiment; in the ken possessing those of ordinary skills; various variations can also be under the prerequisite that does not depart from the utility model aim, made obtaining, also protection domain of the present utility model should be considered as.
Claims (2)
1. high concentration pulverized coal mixing injection device, comprising: an airduct (1), is characterized in that: in a described airduct (1), be provided with the coal dust carrier pipe (2) being connected with coal bunker, be provided with roots blower (3) on described coal dust carrier pipe (2).
2. high concentration pulverized coal mixing injection device according to claim 1, is characterized in that: the outlet of described coal dust carrier pipe (2) extends to the exit of an airduct (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320816332.8U CN203731464U (en) | 2013-12-13 | 2013-12-13 | High-concentration pulverized coal mixed injection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320816332.8U CN203731464U (en) | 2013-12-13 | 2013-12-13 | High-concentration pulverized coal mixed injection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203731464U true CN203731464U (en) | 2014-07-23 |
Family
ID=51201533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320816332.8U Expired - Fee Related CN203731464U (en) | 2013-12-13 | 2013-12-13 | High-concentration pulverized coal mixed injection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203731464U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103712227A (en) * | 2013-12-13 | 2014-04-09 | 山西蓝天环保设备有限公司 | High-concentration pulverized coal mixing injection device and method for increasing combustion efficiency |
-
2013
- 2013-12-13 CN CN201320816332.8U patent/CN203731464U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103712227A (en) * | 2013-12-13 | 2014-04-09 | 山西蓝天环保设备有限公司 | High-concentration pulverized coal mixing injection device and method for increasing combustion efficiency |
| CN103712227B (en) * | 2013-12-13 | 2016-08-17 | 山西蓝天环保设备有限公司 | High concentration pulverized coal mixing injection device and the method improving efficiency of combustion |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140723 Termination date: 20151213 |
|
| EXPY | Termination of patent right or utility model |