CN201251177Y - Secondary wind box of a W-shaped flame furnace - Google Patents
Secondary wind box of a W-shaped flame furnace Download PDFInfo
- Publication number
- CN201251177Y CN201251177Y CNU2008203017447U CN200820301744U CN201251177Y CN 201251177 Y CN201251177 Y CN 201251177Y CN U2008203017447 U CNU2008203017447 U CN U2008203017447U CN 200820301744 U CN200820301744 U CN 200820301744U CN 201251177 Y CN201251177 Y CN 201251177Y
- Authority
- CN
- China
- Prior art keywords
- arch
- air chamber
- secondary air
- flame
- lower hearth
- 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 - Lifetime
Links
Images
Abstract
The utility model discloses an adjusting method of a secondary wind box of a W-shaped flame furnace and a secondary wind box of the W-shaped flame furnace. a. A blastpipe (7) that is connected with a combustor (5) is cancelled; a blast circumferential wind pipe (8) is connected with an arc secondary burning air spraying port (6), and the angle between the arc secondary burning air spraying port (6) and an air outlet of the combustor (5) is adjusted to be 60 to 90 degrees, and the air is sprayed into a lower hearth (1); or b. the diameter of the blastpipe (7) that is connected with the combustor (5) is reduced, and the blast circumferential wind pipe (8) is connected with the arc secondary burning air spraying port (6), and the angle between the arc secondary burning air spraying port (6) and an air outlet of the combustor (5) is adjusted to be 60 to 90 degrees, and the air is sprayed into a lower hearth (1). The secondary wind box can further improve the burning rate of the coal powder, and reduces the exhaustion of the NOx, and has simple structure and is easy to be modified.
Description
Technical field
The utility model relates to a kind of W type flame furnace, particularly relates to a kind of secondary air chamber of W type flame furnace.
Background technology
W type flame furnace is by strengthening a kind of combustion furnace that flame travel promotes coal combustion rate, and this technology is adopted by the boiler of domestic part power plant.This combustion furnace is to arrange the breeze airflow spout on arch, sidewall at combustion furnace is provided with the secondary air mouth, but under many circumstances, encircle the descending obstruction that is subjected to secondary air of last breeze airflow, turn back ahead of time upwards, the time of staying of pulverized coal particle in burner hearth shortened, after-flame to coal dust is unfavorable, taked at present under arch, by certain angle horizontal deflector to be installed in the secondary air chamber for addressing this is that, its objective is and make secondary general mood stream by the downward-sloping burner hearth that is blown into of the angle of deflector, increase the descending degree of depth of a breeze airflow with this, improve the coal dust burn-off rate, suppress the generation of NOx, also have the problem that coal dust firing is insufficient and the NOx discharging is high though certain effect has been played in this measure.The all direct and secondary air chamber bottom welding of existing uniform flow orifice simultaneously, grey at the very easy collection in secondary air chamber bottom like this, secondary wind flows under the influence arch.
The utility model content
The technical problems to be solved in the utility model provides a kind of secondary air chamber that can further improve coal combustion rate, reduces the W type flame furnace of NOx discharging, to overcome the deficiencies in the prior art.
The technical solution of the utility model is: it comprises lower hearth 1, the front-back wall of lower hearth 1 is provided with secondary air chamber 2, in secondary air chamber 2, be provided with dividing plate 3, dividing plate 3 is divided into arch with secondary air chamber 2, and down secondary air chamber and arch are gone up secondary air chamber, under arch, be provided with uniform flow orifice 4 in the secondary air chamber, burner 5 passes arch and goes up the arch that secondary air chamber is connected lower hearth 1, a, be connected with secondary after-flame wind snout 6 on the arch in the arch of lower hearth 1, the angle on the arch between the air outlet of secondary after-flame wind snout 6 and burner 5 is 60～90 °; Perhaps
B, be connected with blast pipe 7 in the upper end of burner 5, on the arch of lower hearth 1, be provided with weary gas circumference airduct 8, on weary gas circumference airduct 8, be connected with secondary after-flame wind snout 6 on the arch, the other end of blast pipe 7 passes secondary after-flame wind snout 6 and enters in the lower hearth 1, and the angle that encircles between the air outlet of going up secondary after-flame wind snout 6 and burner 5 is 60～90 °.
The upper end of secondary after-flame wind snout 6 is equipped with awl cap 9 on arch.
Compared with the prior art, because of the applicant passes through repeatedly on-the-spot the adjustment, the back found that by analog computation opening the big gas that lacks has adverse effect to the coal dust after-flame.So the utility model is the blast pipe cancellation that will be connected on the burner, connecting secondary after-flame wind snout on the arch on the existing weary gas circumference airduct, and adjusting arch and go up to be under 60～90 ° of angles between the air outlet of the angle of secondary after-flame wind snout and burner and spray into lower hearth.Behind the weary gas of cancellation, can increase like this under the burner air outlet flame towards ability, increase coal dust firing stroke, raising coal combustion rate.Go up the secondary wind energy that secondary wind after-flame spout enters and mend wind from the flame inboard, strengthen the later stage and mix from encircleing, further improve coal combustion rate, can also play the classification wind action simultaneously, reduce the NOx discharging.
The blast pipe caliber that is connected on the burner is reduced, the size that is opened in the weary gas circumference airduct on the lower hearth increases or remains unchanged, and connecting secondary after-flame wind snout on the arch on the weary gas circumference airduct, blast pipe passes arch and goes up secondary after-flame wind snout and enter lower hearth, and adjusts arch and go up to be under 60～90 ° of angles between the air outlet of the angle of secondary after-flame wind snout and burner and spray into lower hearth.Go up the secondary wind energy that secondary after-flame wind snout enters and mend wind from the flame inboard, strengthen the later stage and mix from encircleing like this, guarantee the after-flame of coal dust, can also play the classification wind action simultaneously, reduce the NOx discharging.Reduce the blast pipe size and can increase under burner air outlet (wind) flame, increase the coal dust firing stroke, improve coal combustion rate towards ability.In addition, reduce the blast pipe caliber and can also improve weary gas speed, the part NOx that weary gas will be generated after sending into lower hearth at a certain angle above the burner air outlet is reduced into N, plays the effect of fuel staging.Uniform flow orifice and secondary air chamber bottom are provided with the seam of 10～25mm, can prevent secondary air chamber bottom collection ash like this.
The utility model also has simple in structure, transform advantages such as simple, during light maintenance, can finish, have good practicability and operability, after testing simultaneously statistics factually and improving by the utility model, under same ature of coal situation, unburned carbon in flue dust can drop to about 60% of existing level, and the NOx discharging reduces about 20%.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is an another kind of structural representation of the present utility model;
Fig. 3 is the A-A view of Fig. 2.
The specific embodiment
Embodiment 1: as shown in Figure 1, on the front-back wall of W type flame furnace lower hearth 1, weld a secondary air chamber 2 by steel plate, in secondary air chamber 2, be provided with dividing plate 3, dividing plate 3 is divided into arch with secondary air chamber 2, and down secondary air chamber and arch are gone up secondary air chamber, under arch, be provided with uniform flow orifice 4 and water cooling tube in the secondary air chamber, uniform flow orifice 4 and secondary air chamber 2 bottoms are provided with the seam of 10～25mm, can prevent secondary air chamber bottom collection ash like this; Burner 5 passes arch and goes up the arch upper part that secondary air chamber is connected lower hearth 1, a weary gas circumference airduct 8 is offered in the position on the arch of lower hearth 1 simultaneously, connecting secondary after-flame wind snout 6 on the arch on the weary gas circumference airduct 8, the upper end of secondary after-flame wind snout 6 is equipped with awl cap 9 on arch, can strengthen the intake that arch is gone up secondary after-flame wind snout 6 like this; When being installed, secondary after-flame wind snout 6 is 60～90 ° of angles between the air outlet of the air outlet of secondary after-flame wind snout 6 and burner 5; Wind-force when weary gas afterburner 5 air outlets of cancellation just can increase like this, towards ability, increases the coal dust firing stroke under the reinforcement flame, improves coal combustion rate.Secondary after-flame wind snout 6 places send into the secondary wind energy and mend wind, the mixing of reinforcement later stage from the flame inboard on arch simultaneously, can further guarantee the after-flame of coal dust, can also play the classification wind action simultaneously, thereby reduce the NOx discharging.
Embodiment 2: as shown in Figures 2 and 3, on the front-back wall of W type flame furnace lower hearth 1, weld a secondary air chamber 2 by steel plate, in secondary air chamber 2, be provided with dividing plate 3, dividing plate 3 is divided into arch with secondary air chamber 2, and down secondary air chamber and arch are gone up secondary air chamber, under arch, be provided with uniform flow orifice 4 and water cooling tube in the secondary air chamber, uniform flow orifice 4 and secondary air chamber 2 bottoms are provided with the seam of 10～25mm, can prevent secondary air chamber bottom collection ash like this; Burner 5 passes arch and goes up position on the arch that secondary air chamber is connected lower hearth 1, upper end at burner 5 connects a blast pipe 7, on the arch of lower hearth 1, offer a weary gas circumference airduct 8, the diameter of weary gas circumference airduct 8 is greater than the caliber of blast pipe 7, connecting secondary after-flame wind snout 6 on the arch on the weary gas circumference airduct 8, the other end of blast pipe 7 passes the last secondary after-flame wind snout 6 of arch and enters in the lower hearth 1, the upper end of secondary after-flame wind snout 6 is equipped with awl cap 9 on arch, can strengthen the intake that arch is gone up secondary after-flame wind snout 6 like this; Install after burner 5, blast pipe 7 and arch go up secondary after-flame wind snout 6, regulate the air outlet of secondary after-flame wind snout 6, make between the air outlet of the air outlet of secondary after-flame wind snout 6 and burner 5 to be 60～90 ° of angles.Go up the secondary wind energy that secondary after-flame wind snout 6 enters and mend wind from the flame inboard, strengthen the later stage and mix from encircleing like this, guarantee the after-flame of coal dust, can also play the classification wind action simultaneously, reduce the NOx discharging.The size that reduces blast pipe 7 can increase under the flame of burner 5 air outlets (wind) towards ability, increases the coal dust firing stroke, improves coal combustion rate.In addition, the caliber that reduces blast pipe 7 can also improve weary gas speed, and the part NOx that weary gas will be generated after sending into lower hearth 1 at a certain angle above burner 5 air outlets is reduced into N, plays the effect of fuel staging.
Claims (3)
- The secondary air chamber of [claim 1] W type as claimed in claim 1 flame furnace, it comprises lower hearth (1), the front-back wall of lower hearth (1) is provided with secondary air chamber (2), in secondary air chamber (2), be provided with dividing plate (3), dividing plate (3) is divided into arch with secondary air chamber (2), and down secondary air chamber and arch are gone up secondary air chamber, be provided with uniform flow orifice (4) in the secondary air chamber under arch, burner (5) passes arch and goes up the arch that secondary air chamber is connected lower hearth (1), it is characterized in that:A, be connected with arch in the arch of lower hearth (1) and go up secondary after-flame wind snout (6), the angle on the arch between the air outlet of secondary after-flame wind snout (6) and burner (5) is 60～90 °; PerhapsB, be connected with blast pipe (7) in the upper end of burner (5), on the arch of lower hearth (1), be provided with weary gas circumference airduct (8), on weary gas circumference airduct (8), be connected with arch and go up secondary after-flame wind snout (6), the other end of blast pipe (7) passes secondary after-flame wind snout (6) and enters in the lower hearth (1), and the angle that encircles between the air outlet of going up secondary after-flame wind snout (6) and burner (5) is 60～90 °.
- The secondary air chamber of [claim 2] W type according to claim 1 flame furnace is characterized in that: the upper end of secondary after-flame wind snout (6) is equipped with awl cap (9) on arch.
- The secondary air chamber of [claim 3] W type according to claim 1 flame furnace is characterized in that: uniform flow orifice (4) is provided with the seam of 10～25mm bottom secondary air chamber (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008203017447U CN201251177Y (en) | 2008-08-05 | 2008-08-05 | Secondary wind box of a W-shaped flame furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008203017447U CN201251177Y (en) | 2008-08-05 | 2008-08-05 | Secondary wind box of a W-shaped flame furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201251177Y true CN201251177Y (en) | 2009-06-03 |
Family
ID=40746852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008203017447U Expired - Lifetime CN201251177Y (en) | 2008-08-05 | 2008-08-05 | Secondary wind box of a W-shaped flame furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201251177Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101324332B (en) * | 2008-08-05 | 2011-05-11 | 贵州电力试验研究院 | Method for regulating W type flame furnace secondary air chamber and secondary air chamber of W type flame furnace |
| CN107355808A (en) * | 2016-06-02 | 2017-11-17 | 中国大唐集团科学技术研究院有限公司 | W type boilers jet optimizes system |
-
2008
- 2008-08-05 CN CNU2008203017447U patent/CN201251177Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101324332B (en) * | 2008-08-05 | 2011-05-11 | 贵州电力试验研究院 | Method for regulating W type flame furnace secondary air chamber and secondary air chamber of W type flame furnace |
| CN107355808A (en) * | 2016-06-02 | 2017-11-17 | 中国大唐集团科学技术研究院有限公司 | W type boilers jet optimizes system |
| CN107355808B (en) * | 2016-06-02 | 2020-02-07 | 中国大唐集团科学技术研究院有限公司 | W-shaped boiler jet flow optimization system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101725969B (en) | Low-NOx pulverized coal burner | |
| WO2009009945A1 (en) | Low nox swirling pulverized coal burner | |
| CN205807402U (en) | A kind of low-nitrogen oxide discharging vortex burner with surrounding air | |
| CN105465781A (en) | Low-nitrogen-oxide-emission swirl pulverized coal burner with surrounding air | |
| CN2869593Y (en) | Staged-combustion cyclone coal-powder combustor | |
| CN102661605A (en) | Low-NOX liquid slag removal coal dust combustion apparatus possessing triple swirling flow wind | |
| CN101324332B (en) | Method for regulating W type flame furnace secondary air chamber and secondary air chamber of W type flame furnace | |
| CN202082915U (en) | W-shape flame boiler with grading secondary air layout structure | |
| CN107477572A (en) | Using the center feeding rotational flow coal dust burner of separation Secondary Air bilayer jet | |
| CN102966959A (en) | Wall-attached air system for preventing high temperature corrosion of water cooled wall of garbage incinerator | |
| CN201251177Y (en) | Secondary wind box of a W-shaped flame furnace | |
| CN102128446B (en) | Boiler for carrying out mixed combustion on carbon black tail gas and coal | |
| CN201606876U (en) | Low-NOx coal burner | |
| CN104154532A (en) | Center air ring concentrated type turbulent burner | |
| CN200949812Y (en) | Environment-protective energy-saved stream boiler | |
| CN202484975U (en) | Chain-grate boiler for mixed combustion of rice hulls and coals | |
| CN205227306U (en) | Deep or light hierarchical buggy low NOx burner | |
| CN201496958U (en) | W-flame cyclone separation low-oil ignition burner | |
| CN201944836U (en) | Stable-combusting environment-friendly direct current pulverized coal burner | |
| CN201348244Y (en) | Fixed pulverized coal nozzle of central air multi-channel lignite burner | |
| CN201666566U (en) | Burning coal industrial boiler system | |
| CN103411215A (en) | Multi-directional jet-type cyclone pulverized coal burner | |
| CN207006132U (en) | Low-volatile coal burner | |
| CN202993228U (en) | Wall-attaching air system preventing high temperature corrosion of water wall of garbage incinerator | |
| CN102798118B (en) | Cyclone boiler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20090603 Effective date of abandoning: 20080805 |