CN2591434Y - High-temperature air ignitor for pulverized-fuel boiler - Google Patents
High-temperature air ignitor for pulverized-fuel boiler Download PDFInfo
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- CN2591434Y CN2591434Y CN 02282560 CN02282560U CN2591434Y CN 2591434 Y CN2591434 Y CN 2591434Y CN 02282560 CN02282560 CN 02282560 CN 02282560 U CN02282560 U CN 02282560U CN 2591434 Y CN2591434 Y CN 2591434Y
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Abstract
The utility model relates to a high-temperature air ignitor for a pulverized coal fired boiler, which belongs to the technical field of an auxiliary machine of a boiler. An oil injection method is generally used by the pulverized coal fired boiler to carry out ignition to cause a large quantity of fuel oil to be consumed. In order to save the oil, the ignitor of the utility model which is designed according to the principle that pulverized coal which is carried by primary air and high temperature air which is heated to 600-1300 DEG C are mixed in a combustion chamber to cause the pulverized coal to be fired is composed of a pulverized coal pipe, an air pipe, a high-temperature air heater and a high-temperature air chamber. The utility model does not need a large amount of fuel oil and can prevent the wall surface of the combustion chamber from coking. The utility model has the advantages of reasonable structure, convenient operation and safety; the utility model can stably operate for a long time.
Description
Technical field
The utility model relates to boiler random field.
Technical background
How the igniting of pulverized-coal fired boiler, combustion-supporting, steady combustion are carried out with the method for oil spout, need to consume a large amount of fuel oils.China is the country of primary energy based on coal, the oil and natural gas relative shortage.Along with rapid economy development, the demand of high-grade energy is constantly increased, the consumption of oil, natural gas is the situation of accelerated growth.Chinese net importation oil was 4,381 ten thousand tons in 1999, and 7,000 ten thousand tons of imports in 2000 need more than 140 hundred million dollars of hands over foreign exchange for this reason.Expecting the year two thousand twenty China will be up to more than 50% to the import volume of oil.In the face of the severe day by day oil supply and demand situation and the uncertainty of international oil price, the consumption that reduces oil is the long term policy of China.
In order to reduce the consumption of oil, must seek a kind of practicable non-oil ignition method and device.With the high temperature air igniting is a kind of selection of wisdom, China and foreign countries' Searches of Patent Literature shows, adding hot-air with medium frequency induction heater has been a kind of mature technique, but is used for firing coal-dust also beyond example in boiler, must in good time this technological development be come out.
Summary of the invention
The purpose of this utility model provides a kind ofly can light the different quality coal dust reliably, simple in structure, easy to operate, the pulverized-coal fired boiler high temperature air igniter with the high temperature air firing coal-dust that can long-term stable operation.
Pulverized-coal fired boiler high temperature air ignition device structure is as follows: in the front, combustion chamber coal pipe is housed, air hose and high-temperature air heater, coal dust pipeline section near the combustion chamber is the igniting cavity, is with the high temperature air chamber that is communicated with air hose outside the igniting cavity, in the back, combustion chamber secondary wind shell is housed.
Concrete structure during enforcement is: the high temperature air chamber is a circulus, on the outer ring surface of high temperature air chamber, have high temperature air chamber inlet hole, inlet hole is connected with air hose, the indoor anchor ring of high temperature air has a plurality of equally distributed high temperature airs chamber outlet opening, and high-temperature air heater is contained in outside the air hose.The high temperature air chamber also can be divided into two sections, near the combustion chamber is ring-type high temperature air chamber, far away is the tubular high temperature air chamber, is evenly distributed with a plurality of high temperature air through holes on two sections demarcation strip, has a plurality of hot blasts hole on the igniting cavity in the tubular high temperature air chamber.
Another kind of concrete structure is: the high temperature air chamber is a tubular structure, is communicated with air hose away from an end of combustion chamber, and the other end is communicated with the combustion chamber, a plurality of heat exchanger fins is housed in that high temperature air is indoor, and high-temperature air heater is contained in the high temperature air outside.The end that the high temperature air chamber is communicated with the combustion chamber is that the high temperature air port of export also can be equipped with an interior cover around coal pipe, is enclosed within igniting cavity outlet end, has a plurality of high temperature air outlet openings on interior jacket wall.Coal dust also can divide two-way to enter the combustion chamber, and one the road enters through the igniting cavity from the duff tube cell that is connected end, high temperature air chamber, and another road enters from the rough coal tube cell that is connected middle part, high temperature air chamber.
Also have a class concrete structure to be: the high temperature air chamber is a multilayer sleeve structure, is communicated with air hose away from an end of combustion chamber, and the other end is communicated with the combustion chamber, multilayer sleeve with the series connection form successively inside and outside connection, high-temperature air heater is contained in the high temperature air outside.The high temperature air chamber also can be divided into two sections, is multilayer sleeve structure away from combustion section, and the high temperature air outlet section of close combustion chamber is the individual layer high temperature air chamber around the igniting cavity, has a plurality of high temperature air through holes to be communicated with between two sections.
During work, coal dust is carried from coal pipe by a wind and enters the igniting cavity, and air enters the high temperature air chamber from air hose, and at this moment, sensed heater is heated to 600-1300 ℃, the mixing of meeting in the combustion chamber of high temperature air and coal dust, and coal dust is lighted.Show through repeatedly lighting test, the utlity model has following advantage:
No matter the quality of 1 coal dust how, with the high temperature air firing coal-dust is fully feasible, the utility model device can directly be lighted 200,000 unit 670t/h boilers, or the boiler of 300,000 units, the mode that adopts little fire to put big fire can also be lighted the boiler of bigger unit, and the steady combustion can be used for underrun time the and combustion-supporting, can save great amount of fuel oil.
2, in the combustion chamber, can prevent the wall coking, add of the cooling effect of secondary wind again, can prevent the wall coking fully burner owing to entering of high temperature air.
3, apparatus structure is reasonable, and is easy to operate, safe and reliable, and operation under normal circumstances can maintain a long-term stability.
Description of drawings
Fig. 1 is the structural representation of first embodiment of the utility model pulverized-coal fired boiler high temperature air igniter, and high-temperature air heater is contained in outside the air hose, and the high temperature air chamber is a loop configuration.
Fig. 2 is the structural representation of second embodiment of the utility model, and high-temperature air heater is contained in outside the air hose, and the high temperature air chamber is divided into two sections of loop configuration and tubular structures.
Fig. 3 is the structural representation of the 3rd embodiment of the utility model, and it is outdoor that high-temperature air heater is contained in high temperature air.
Fig. 4 is the structural representation of the 4th embodiment of the utility model, and it is outdoor that high-temperature air heater is contained in high temperature air, at the high temperature air chamber outlet end interior cover is housed.
Fig. 5 is the structural representation of the 5th embodiment of the utility model, and it is outdoor that high-temperature air heater is contained in high temperature air, and the high temperature air chamber is a multilayer sleeve structure, at the high temperature air chamber outlet end interior nested structure is housed also.
Fig. 6 is the structural representation of the 6th embodiment of the present utility model, and coal dust enters the combustion chamber through rough coal tube cell and duff tube cell two-way.
The specific embodiment
Fig. 1 has shown first embodiment of the present utility model, the coal dust that is carried by wind is communicated with combustion chamber 9 by coal pipe 1, coal pipe is divided into igniting cavity 8 near combustor section, outside the igniting cavity, induction heater 7 is housed, to coal dust heating by the igniting cavity, the high temperature air chamber 4 of loop configuration being housed in the end of igniting cavity, air hose 2 is housed on the outer ring surface of high temperature air chamber, induction heater 3 is housed outside air hose, to the air heat that enters, in the indoor anchor ring of high temperature air is, have equally distributed a plurality of high temperature airs chamber outlet opening 6 on the cover 5, secondary wind shell 15 is housed in the back, combustion chamber.Temperature can reach about 1000 ℃ when the air of sensed heater heating arrived the combustion chamber through the outlet of high temperature air chamber during work, coal dust is through coal pipe, temperature reaches 300-600 ℃ behind the igniting cavity, enter the combustion chamber, coal dust meets with high temperature air and mixes in the combustion chamber, make coal dust reach ignition temperature, thereby realize the high temperature air igniting of pulverized-coal fired boiler.Also have hot-air to enter secondary wind shell in addition, form surrounding air, surrounding air and secondary wind fully burn coal dust for burning provides enough air quantity and oxygen amounts.
Fig. 2 has shown second embodiment of the present utility model, coal pipe 1 is communicated with combustion chamber 9 through igniting cavity 8, outside the igniting cavity, the high temperature air chamber is housed, the high temperature air chamber is divided into two sections, near the combustion chamber is ring-type high temperature air chamber 4, another section is a tubular high temperature air chamber 14, on dividing plate 16, be distributed with a plurality of through holes 17, on the indoor ring 5 of ring-type high temperature air, have equally distributed a plurality of high temperature airs chamber outlet opening 6, have a plurality of oblique hot blasts hole 18 on the igniting cavity in the tubular high temperature air chamber, at the outdoor bread of high temperature air heat-insulation layer 12 is arranged, at the outdoor face of ring-type high temperature air air hose 2 is housed, induction heater 3 is housed outside air hose, in secondary wind shell 15 and burner are equipped with in the back, combustion chamber, overlaps 25.
Fig. 3 has shown the 3rd embodiment of the present utility model, coal pipe 1 is communicated with combustion chamber 9 through igniting cavity 8, outside the igniting cavity, tubular high temperature air chamber 4 is housed, between high temperature air chamber and igniting cavity, a plurality of heat exchanger fins 13 are housed, be communicated with air hose 2 in end, high temperature air chamber away from the combustion chamber, have equally distributed a plurality of air intakes hole 10 in this end, high temperature air chamber, induction heater 3 is housed on high temperature air chamber outer wall 11, outside induction heater, be surrounded by heat-insulation layer 12, the high temperature air chamber is communicated with the combustion chamber by flange 26, overlaps 25 in secondary wind shell 15 and burner are equipped with in the back, combustion chamber.
Fig. 4 has shown the 4th embodiment of the present utility model, this embodiment is a kind of improvement of the 3rd embodiment, promptly an end that is communicated with combustion chamber 9 in high temperature air chamber 4 is equipped with an interior cover 5 around igniting cavity 8, has a plurality of high temperature air outlet openings 6 on interior jacket wall.
Fig. 5 has shown the 5th embodiment of the present utility model, coal pipe 1 is communicated with combustion chamber 9 through igniting cavity 8, the high temperature air chamber of outside the igniting cavity, multilayer sleeve structure being housed, the innermost layer is a cavity tempering room 21, outwards be followed successively by internal layer high temperature air chamber 22, outer high temperature air chamber 23, each floor height warm air chamber is to be communicated with successively inside and outside the mode of series connection, be communicated with air hose 2 at a end away from the combustion chamber, air is to come out to enter cavity tempering room 21 through cavity tempering room inlet 10 from blank pipe, enter internal layer high temperature air chamber 22 from cavity tempering room outlet 19 then, enter outer high temperature air chamber 23 through internal layer high temperature air chamber outlet 20 again, enter around the individual layer high temperature air chamber 4 of igniting cavity 8 through outer high temperature air chamber through hole 24 again, high temperature air chamber on individual layer high temperature air chamber interior walls 5 outlet 6 enters combustion chamber 9 again, in multi-layer high-temperature air chamber outside induction heater 3 is housed, heat-insulation layer 12 is housed between high temperature air chamber and induction heater, secondary wind shell 15 is housed in the back, combustion chamber.
Fig. 6 has shown the 6th embodiment of the present utility model, coal dust divides two-way to enter combustion chamber 9, one the road enters combustion chamber 9 from the duff tube cell 1 that is connected 4 ends, high temperature air chamber through igniting cavity 8, coal dust meets and lights at combustion chamber and high temperature air again through air heater heating, another road directly enters combustion chamber 9 from the rough coal tube cell 27 that is connected 4 middle parts, high temperature air chamber without heating, cold coal dust enters meets flame behind the combustion chamber and lights, and has promptly finished the ignition procedures of little fire point big fire.
Claims (8)
1, pulverized-coal fired boiler high temperature air igniter, it is characterized by the front, combustion chamber coal pipe (1) is housed, air hose (2) and high-temperature air heater (3), coal dust pipeline section near the combustion chamber is igniting cavity (8), outside the igniting cavity, be with the high temperature air chamber (4) that is communicated with air hose, secondary wind shell (15) is housed in the back, combustion chamber.
2, pulverized-coal fired boiler high temperature air igniter according to claim 1, it is characterized by high temperature air chamber (4) and be circulus, on the outer ring surface of high temperature air chamber, have high temperature air chamber inlet hole, inlet hole is connected with air hose, the indoor anchor ring of high temperature air has a plurality of equally distributed high temperature airs chamber outlet openings (6), and high-temperature air heater (3) is contained in outside the air hose (2).
3, pulverized-coal fired boiler high temperature air igniter according to claim 1 and 2, it is characterized by the high temperature air chamber and be divided into two sections, near the combustion chamber is ring-type high temperature air chamber (4), far away is tubular high temperature air chamber (14), on two sections demarcation strips (16), be evenly distributed with a plurality of high temperature air through holes (17), have a plurality of hot blasts hole on the igniting cavity in the tubular high temperature air chamber.
4, pulverized-coal fired boiler high temperature air igniter according to claim 1, it is characterized by high temperature air chamber (4) and be tubular structure, end away from the combustion chamber is communicated with air hose (2), the other end is communicated with combustion chamber (9), a plurality of heat exchanger fins are housed in that high temperature air is indoor, high-temperature air heater is contained in the high temperature air outside.
5, according to claim 1 or 4 described pulverized-coal fired boiler high temperature air igniters, it is characterized by the end that high temperature air chamber (4) is communicated with combustion chamber (9) an interior cover (5) around coal pipe is housed, be enclosed within igniting cavity (8) port of export, on interior cover (5) wall, have a plurality of high temperature air outlet openings (6).
6, according to claim 1 or 4 described pulverized-coal fired boiler high temperature air igniters, it is characterized by coal dust divides two-way to enter combustion chamber (9), coal dust also can divide two-way to enter the combustion chamber, one the road enters through the igniting cavity from the duff tube cell (1) that is connected end, high temperature air chamber, and another road enters from the rough coal tube cell (27) that is connected middle part, high temperature air chamber.
7, pulverized-coal fired boiler high temperature air igniter according to claim 1, it is characterized by the high temperature air chamber is multilayer sleeve structure (21) (22) (23), end away from combustion chamber (9) is communicated with air hose (2), the other end is communicated with the combustion chamber, multilayer sleeve is communicated with so that the series connection form is inside and outside successively, and high-temperature air heater (3) is contained in the high temperature air outside.
8, according to claim 1 or 7 described pulverized-coal fired boiler high temperature air igniters, it is characterized by the high temperature air chamber and be divided into two sections, away from combustion section is multilayer sleeve structure (21) (22) (23), be individual layer high temperature air chamber (4) near combustion section, have a plurality of high temperature air through holes (24) to be communicated with between two sections around the igniting cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02282560 CN2591434Y (en) | 2002-10-16 | 2002-10-16 | High-temperature air ignitor for pulverized-fuel boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02282560 CN2591434Y (en) | 2002-10-16 | 2002-10-16 | High-temperature air ignitor for pulverized-fuel boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2591434Y true CN2591434Y (en) | 2003-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02282560 Expired - Fee Related CN2591434Y (en) | 2002-10-16 | 2002-10-16 | High-temperature air ignitor for pulverized-fuel boiler |
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| Country | Link |
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| CN (1) | CN2591434Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868068A (en) * | 2014-03-24 | 2014-06-18 | 王龙陵 | High temperature oxygen direct ignition and combustion stabilization system |
| CN107246607A (en) * | 2017-07-06 | 2017-10-13 | 山西大学 | A kind of automatic stable burning system for Process In A Tangential Firing |
| CN112503570A (en) * | 2020-11-23 | 2021-03-16 | 西安航天动力试验技术研究所 | High-temperature compressed air ignition device and ignition method for combustion type air heater |
-
2002
- 2002-10-16 CN CN 02282560 patent/CN2591434Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868068A (en) * | 2014-03-24 | 2014-06-18 | 王龙陵 | High temperature oxygen direct ignition and combustion stabilization system |
| CN103868068B (en) * | 2014-03-24 | 2016-03-02 | 王龙陵 | A kind of high-temperature oxygen direct-fire and surely fire system |
| CN107246607A (en) * | 2017-07-06 | 2017-10-13 | 山西大学 | A kind of automatic stable burning system for Process In A Tangential Firing |
| CN107246607B (en) * | 2017-07-06 | 2023-05-30 | 山西大学 | Automatic stable combustion system for four-corner tangential boiler |
| CN112503570A (en) * | 2020-11-23 | 2021-03-16 | 西安航天动力试验技术研究所 | High-temperature compressed air ignition device and ignition method for combustion type air heater |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |