CN101476722A - Controllable air film double-side strong pre-heating breeze combustion device - Google Patents
Controllable air film double-side strong pre-heating breeze combustion device Download PDFInfo
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- CN101476722A CN101476722A CNA2009100255438A CN200910025543A CN101476722A CN 101476722 A CN101476722 A CN 101476722A CN A2009100255438 A CNA2009100255438 A CN A2009100255438A CN 200910025543 A CN200910025543 A CN 200910025543A CN 101476722 A CN101476722 A CN 101476722A
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- pulverized coal
- air film
- wind
- fire
- air
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Abstract
The invention relates to a controllable air film bilateral forcedly preheating pulverized coal combusting device. The device is provided with a tubular pulverized coal pipeline which is communicated with a furnace hearth; a combustor spout cavity where the pulverized coal pipeline is connected with the furnace hearth and the fire-backing side of the furnace hearth are provided with a bulge-expansion cavity which is enlarged towards one side; the side wall of the bulge-expansion cavity is provided with an air film wind window through which air film wind can pass; the periphery of the bulge-expansion cavity is covered by a shell to form a wind box; and an inlet of the wind box is provided with a wind amount actuator and a wind amount adjustor which can adjust the ventilating amount of the bulge-expansion cavity. The device can make the pulverized coal on the fire-facing side ignited in advance and preheat the pulverized coal airflow on the fire-backing side to effectively intensify the combustion of the pulverized coal and improve combustion efficiency. The device can widely improve applicability of the boiler coal class and widely use different classes of coal.
Description
Technical field
The present invention relates to a kind of wide in range suitable coal powder burner, a kind of controllable air film bilateral strong preheat pulverized coal combustion device.
Background technology
Present many power plant are because reality uses coal to change greatly, ature of coal is relatively poor, volatile content is low, content of ashes is big, what have differs greatly with design coal, in power plant's normal course of operation, cause catch fire postponement, burn deterioration easily, even cause contingencies such as " fire extinguishing are blown out ", influence safe operation of power plant.The ature of coal difference can cause also that efficiency of combustion is low, unburned carbon in flue dust or big slag phosphorus content is too high, pollutant emission exceeds standard, and also needs fuel oil combustion-supporting sometimes, influence the economy that power plant moves.
Summary of the invention
In order to address the above problem, the present invention provides a kind of wide in range suitable coal powder burner, controllable air film bilateral strong preheat pulverized coal combustion device; This device is primarily aimed at the problems referred to above to be increased the coal dust scope of application, strengthening fire burns, improves efficiency of combustion, improves the low-load combustion-stabilizing performance, reduces pollutant emission, reduces contingency etc.; This device adopts bilateral strengthening preheating mode in addition, is specially adapted to the unburnable coal of many ashes, low-volatile.Use this burner and can bring suitable economic and social benefit for power plant.
The technical solution adopted for the present invention to solve the technical problems is: this device is by pulverized coal channel, chamber, burner nozzle chamber, and the sudden expansion chamber, air compartment, actuator and volume adjusting apparatus are formed; It is characterized in that: this device has the pulverized coal channel of a tubulose to communicate with burner hearth, at the place, burner nozzle chamber that pulverized coal channel and burner hearth join, back of the body fire one side at burner hearth is provided with the sudden expansion chamber that enlarges to a side, on the sidewall in sudden expansion chamber, having can be by the air film air regulator mouth of air film wind, periphery in the sudden expansion chamber is wrapped in by shell and is formed with air compartment, the porch of air compartment, be provided with air quantity actuator and volume adjusting apparatus, it can regulate the ventilation in sudden expansion chamber.
Its theory of combustion is: one time the wind breeze airflow enters the burner nozzle chamber and sprays into the burner hearth burning along pipeline, wind pulverized coal channel of its inlet side of waring oneself in front of a fire, pulverized coal borne air flow is along waring oneself in front of a fire the parallel burner hearth that sprays into of side, and the side flame preheating of being warmd oneself in front of a fire at the spout place makes it conflagration; And air film sudden expansion chamber is set at back-fire side, the furnace high-temperature flue gas is entrainmented with pressure in this sudden expansion chamber, this high-temperature flue gas enters inside, burner nozzle chamber by the outside to be mixed with the back-fire side pulverized coal borne air flow, so that a wind breeze airflow at this place is carried out peheat force and overheavy firing.The back of the body of burner, the both sides that the warm oneself in front of a fire preheating that all strengthened like this, thus burner is caught fire in advance and flameholding.Because this sudden expansion chamber arranged outside air film air regulator mouth, force to entrainment enter this sudden expansion chamber the furnace high-temperature flue gas not only arranged, also have the cold wind in the outside, burner nozzle chamber, this cold wind flows along wall and forms air film wind.Therefore what of exhaust gas volumn are size that can be by regulating air film wind air quantity entrainment with control, make it to adapt to the variation of coal; This air film wind also can cool off to prevent that spout is by scaling loss the spout wall simultaneously.
Its beneficial effect is: this device can make the side coal dust that warms oneself in front of a fire catch fire in advance, and preheating back-fire side breeze airflow, but the burning of efficient hardening coal dust improves efficiency of combustion; Can extensively strengthen the applicability of boiler coal, be extensive use of different coals.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing;
Accompanying drawing is a structural representation of the present invention;
1. pulverized coal channels among the figure, 2. burner nozzle chamber, 3. sudden expansion chamber, 4. air film air regulator mouth, 5. air compartment, 6. actuator, 7. volume adjusting apparatus.
The specific embodiment
This installs by pulverized coal channel 1, chamber, burner nozzle chamber 2, and sudden expansion chamber 3, air compartment 5, actuator 6 and volume adjusting apparatus 7 are formed; It is characterized in that: this device has the pulverized coal channel 1 of a tubulose to be connected with burner hearth, at 2 places, burner nozzle chamber that pulverized coal channel 1 and burner hearth join, back of the body fire one side at burner hearth is provided with the sudden expansion chamber 3 that enlarges to a side, on the sidewall in sudden expansion chamber 3, having can be by the air film air regulator mouth 4 of air film wind, periphery in sudden expansion chamber 3 is wrapped in by shell and forms air compartment 5, the porch of air compartment 5, be provided with air quantity actuator 6 and volume adjusting apparatus 7, it can regulate the ventilation in sudden expansion chamber.
Its theory of combustion is: one time the wind breeze airflow enters burner nozzle chamber 2 and sprays into the burner hearth burning along pulverized coal channel, its wind pulverized coal channel 1 side of waring oneself in front of a fire, pulverized coal borne air flow is along waring oneself in front of a fire the parallel burner hearth that sprays into of side, and the side flame preheating of being warmd oneself in front of a fire at the spout place makes it conflagration; And air film sudden expansion chamber 3 is set at back-fire side, and will force to entrainment the furnace high-temperature flue gas, this high-temperature flue gas is entered by the outside and mixes with the back-fire side pulverized coal borne air flow in the burner nozzle chamber 2, and the wind breeze airflow at this place is carried out peheat force and overheavy firing.The back of the body of burner, the both sides that the warm oneself in front of a fire preheating that all strengthened like this, thus burner is caught fire in advance and flameholding.Because these sudden expansion chamber 3 arranged outside air film air regulator mouths, force to entrainment enter this sudden expansion chamber the furnace high-temperature flue gas not only arranged, also have the cold wind in 2 outsides, burner nozzle chamber, this cold wind flows along wall and forms air film wind.Therefore what of exhaust gas volumn are size that can be by regulating air film wind air quantity entrainment with control, make it to adapt to the variation of coal; This air film wind also can cool off to prevent that spout is by scaling loss the spout wall simultaneously.
Claims (1)
1. controllable air film bilateral strong preheat pulverized coal combustion device, this installs by pulverized coal channel (1), chamber, burner nozzle chamber (2), sudden expansion chamber (3), and air compartment (5), actuator (6) and volume adjusting apparatus (7) are formed; It is characterized in that: this device has the pulverized coal channel (1) of a tubulose to be connected with burner hearth, locate in the burner nozzle chamber (2) that pulverized coal channel (1) and burner hearth join, back of the body fire one side at burner hearth, be provided with the sudden expansion chamber (3) that enlarges to a side, on the sidewall in sudden expansion chamber (3), having can be by the air film air regulator mouth (4) of air film wind, periphery in sudden expansion chamber (3), be wrapped in by shell and form air compartment (5), the porch of air compartment (5), be provided with air quantity actuator (6) and volume adjusting apparatus (7), it can regulate the ventilation of sudden expansion chamber (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100255438A CN101476722A (en) | 2009-02-05 | 2009-02-05 | Controllable air film double-side strong pre-heating breeze combustion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100255438A CN101476722A (en) | 2009-02-05 | 2009-02-05 | Controllable air film double-side strong pre-heating breeze combustion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101476722A true CN101476722A (en) | 2009-07-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009100255438A Withdrawn CN101476722A (en) | 2009-02-05 | 2009-02-05 | Controllable air film double-side strong pre-heating breeze combustion device |
Country Status (1)
| Country | Link |
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| CN (1) | CN101476722A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103807844A (en) * | 2014-01-24 | 2014-05-21 | 华东理工大学 | Method for cooling metal wall in contact with high-temperature gas |
-
2009
- 2009-02-05 CN CNA2009100255438A patent/CN101476722A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103807844A (en) * | 2014-01-24 | 2014-05-21 | 华东理工大学 | Method for cooling metal wall in contact with high-temperature gas |
| CN103807844B (en) * | 2014-01-24 | 2016-01-20 | 华东理工大学 | A kind of metallic walls cooling means contacted with high-temperature gas |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C04 | Withdrawal of patent application after publication (patent law 2001) | ||
| WW01 | Invention patent application withdrawn after publication |