CN104595892B - Improve the ejection grading combustion W flame boiler of coal powder ignition burning - Google Patents
Improve the ejection grading combustion W flame boiler of coal powder ignition burning Download PDFInfo
- Publication number
- CN104595892B CN104595892B CN201410849563.8A CN201410849563A CN104595892B CN 104595892 B CN104595892 B CN 104595892B CN 201410849563 A CN201410849563 A CN 201410849563A CN 104595892 B CN104595892 B CN 104595892B
- Authority
- CN
- China
- Prior art keywords
- air
- spout
- group
- burner hearth
- air port
- 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.)
- Active
Links
Abstract
Improve the ejection grading combustion W flame boiler of coal powder ignition burning the present invention relates to a kind of, the W flame boiler includes upper furnace, lower hearth, the burner hearth that preceding chimney arch and rear chimney arch are constituted, it is arranged at multiple overfire air port groups on preceding chimney arch and rear chimney arch, multiple breeze airflow spout groups, multiple overfire air port groups and multiple breeze airflow spout groups are along stove cross direction in the equidistant interlaced arrangement side by side of in-line, multiple breeze airflow spout groups can be installed on chimney arch with fixed angle, the incident angle of Secondary Air is adjustable, upper furnace can set the adjustable fire air nozzle of multiple incident angles, before burner hearth, rear water wall can set the adjustable tertiary air spout of two layers of incident angle.W flame boiler of the present invention can be effectively improved coal dust firing in stove, improve adaptability of the boiler to coal, effectively adjust main reheat steam temperature and reach design load, reduce NOxDischarge and exhaust gas temperature, prevent front-back wall slagging, it is to avoid heat fatigue occurs in furnace hopper water-cooling wall.
Description
Technical field
The present invention relates to W flame technical field of boiler combustion, and in particular to one kind can be effectively improved coal powder ignition burning and W
The ejection grading combustion W flame boiler of primary zone position-adjustable in flame boiler.
Background technology
Coal is that China is current and topmost primary energy, wherein thermal power generation coal in following significant period of time
It is one of major way that coal in China is utilized.According to China's fuel policy and using energy source situation, anthracite and meager coal are in electricity
Proportion up to will be increased further to 40%~50%, and in future in boiler of standing combustion coal consumption.To realize efficiently combustion
With anthracite and meager coal, foreign countries develop a kind of W flame type of furnace for aiming at and using anthracite and meager coal, and China was from 80 years 20th century
Generation end beginning is extensive to introduce W flame boiler from foreign countries, and is obtaining widespread adoption in recent years.
" W " flame boiler holds business by technology and is divided into Foster Wheeler W flame boiler, Ba Wei W flames boiler, Si Tanyin W
Flame boiler and bucket bar W flame boiler.On bucket bar " W " stove, put into operation many and mostly subcritical boiler for the country at present, super to face
Boundary's boiler then only has Yunnan Zhenxiong and Guizhou Tang Zhai tetra-, and wherein two W flame boilers of Guizhou Tang Zhai are China's independent research
Multistage ejection grading combustion technology burner.Summarize bucket bar technology and China bucket bar technology W flame boiler running situation see, its
There are problems, such as coal dust jet catches fire poor late, combustion stability, slagging serious (including side wall and front-back wall), combustion
Poor, NO to the greatest extentxHigh (generally 1100~the 1700mg/m of discharge3(6% oxygen of folding)), although Chinese scholar is developed regarding to the issue above
The novel burner of autonomous property right, but running situation shows that " W " flame boiler still has reheat steam temperature off-design value, combustion
Rate is low, combustion stability is poor, high fume temperature, NO to the greatest extentxDischarge and ash content carbon are high, front-back wall slagging is serious, under flame
Punching causes the problems such as heat fatigue drawing crack and booster occurs in furnace hopper water-cooling wall greatly.Based on this, to realize the W fire based on bucket bar technology
The safe and stable operation of flame boiler, it is necessary to optimizing combustor structure and firing optimization mode regarding to the issue above.
The content of the invention
The technical problems to be solved by the invention, which are to provide one kind, can be effectively improved coal powder ignition burning, effectively adjust master again
Hot vapour temperature reaches design load, reduction boiler ash phosphorus content, prevents front-back wall slagging, prevents heat from occurring in furnace hopper water-cooling wall tired
Labor, reduction NOxThe ejection grading combustion W flame boiler of discharge capacity and exhaust gas temperature.
The present invention solves the technical scheme that is used of above-mentioned technical problem：It is a kind of to improve the injection point of coal powder ignition burning
Level burning W flame boiler, including the burner hearth that upper furnace, lower hearth, preceding chimney arch and rear chimney arch are constituted, on preceding chimney arch from burner hearth
The heart between burner hearth front water wall and on rear chimney arch from burner hearth center to setting multiple two burner hearth rear water wall
Secondary wind snout, multiple breeze airflow spouts, the multiple overfire air port and multiple breeze airflow spouts are connected with lower hearth
Logical, the multiple overfire air port is made up of multiple overfire air port groups, and each overfire air port group is before and after two close to cloth
The overfire air port put is constituted；The multiple breeze airflow spout includes multiple breeze airflow spout groups, each breeze airflow spray
Mouthful group is constituted by thick coal culm air-flow spout group and with the thin powdered coal air-flow spout group that is arranged close to before and after thick coal culm air-flow spout group,
The thick coal culm air-flow spout group is made up of two or so the thick coal culm being closely packed together air-flow spouts, the thin powdered coal air-flow spray
Mouth group is made up of two or so the thin powdered coal being closely packed together air-flow spouts, the multiple overfire air port group and multiple coal dust gas
Spout group is flowed along stove cross direction in the equidistant interlaced arrangement side by side of in-line.Ejection grading combustion W flame pot of the present invention
Stove, by thick coal culm air-flow spout group with being arranged close to before and after thin powdered coal air-flow spout group, can strengthen after thick coal culm catches fire to light coal
The influence of powder, then cause thin powdered coal catch fire be more prone to, pulverized coal particle burn-up efficiency is further improved.Simultaneously as multiple
The setting for the breeze airflow spout group being made up of thick coal culm air-flow spout group and thin powdered coal air-flow spout group so that W flame boiler
The overall coal dust amount of interior First air is improved, and then make it that in stove that coal dust early stage is caught fire heat Relatively centralized, coal powder ignition is relatively easy to.
In addition, multiple breeze airflow spout groups and multiple overfire air port groups are equidistantly interlocked cloth side by side along stove cross direction in in-line
Put, ejector action of the Secondary Air to breeze airflow can be strengthened, while being also beneficial to the timely oxygenating after coal powder ignition, and then enter one
Step improves the combustion stability after coal powder ignition.
Preferably, the distance of the coboundary and the coboundary of overfire air port group of the thick coal culm air-flow spout group is
b3, b3More than or equal to zero, the distance of the lower boundary of the thin powdered coal air-flow spout group and the lower boundary of overfire air port group is b4,
b4More than zero.Multiple thick coal culm air-flow spout groups and multiple thin powdered coal air-flow spout groups are accommodated in multiple overfire air port groups
It is interior, can further promote breeze airflow catch fire after Secondary Air timely oxygenating burning, also improve Secondary Air to breeze airflow
Ejector action, prevents while Secondary Air unnecessary between front-back wall water-cooling wall and breeze airflow plays reduction front-back wall water cooling wall temperature
The only effect of slagging.
Preferably, the coboundary of the overfire air port group from a distance from the boundary line of chimney arch and upper furnace be b1, b1Greatly
In zero, the lower boundary of the overfire air port group is from the distance between the boundary line of the forward and backward wall water-cooling wall of burner hearth and chimney arch b2, b2
More than zero.
Preferably, the multiple breeze airflow spout group is fixedly mounted to the centroclinal certain angle of stove, established angle
The angle of degree and center line is α, and α span is 5~10 °, and the multiple overfire air port group is provided with Secondary Air angle
Governor motion, the angle adjustable scope of the multiple overfire air port group is -5~20 °, the overfire air port and chimney arch water cooling
Gap is provided between wall, the gap is provided with flexible sealing.By multiple breeze airflow spout groups of W flame boiler with fixed angle
Degree is installed, while overfire air port group carries out angular adjustment by Secondary Air angle adjusting mechanism.In W flame boiler operatiopn
During, breeze airflow is sprayed into stove with fixed angle, but the injection under the incidence angles degree by adjusting Secondary Air
Effect, you can change the position that breeze airflow sprays into burner hearth.Gap between the up-and-down boundary and chimney arch water-cooling wall of overfire air port
Setting, it is therefore intended that ensure the adjustable of overfire air port.
As further preferred, Secondary Air angle adjusting mechanism includes stepper motor, shaft coupling, gearbox, multistage cylinder
Spur gear, the overfire air port is fixed in secondary air box by bearing, the overfire air port group and multistage cylindrical straight gear
Wheel is connected, and multistage spur gear wheel is arranged in gearbox, and the gearbox is connected by shaft coupling with stepper motor.
In W flame boiler running process, each overfire air port group realizes Secondary Air using stepper motor by multistage spur gear wheel
Accurate adjustment before and after spout group between -5 to 20 °.
Preferably, being symmetrical arranged upper strata tertiary air spout on the front water wall and rear water wall of the burner hearth with
Layer tertiary air spout, upper strata tertiary air spout, lower floor's tertiary air spout are equidistantly arranged side by side along stove cross direction in in-line, institute
The distance between the lower boundary of upper strata tertiary air spout and the coboundary of lower floor's tertiary air spout are stated for b7, b7More than zero, it is described on
The coboundary of layer tertiary air spout is b from the distance between boundary line of the forward and backward wall water-cooling wall of burner hearth and chimney arch6, b6More than zero,
The lower boundary of lower floor's tertiary air spout is with a distance from the boundary line from the forward and backward wall water-cooling wall of burner hearth and the furnace hopper of lower hearth
b8, b8More than zero.The setting of upper strata tertiary air spout and lower floor's tertiary air spout can deepen Researched of Air Staging Combustion Burning Pulverized Coal, suppress NOxLife
Into.
Preferably, the front water wall and rear water wall of upper furnace are provided with multiple fire air nozzles, the after-flame
Wind snout is equidistantly arranged side by side along stove cross direction in in-line, and the lower boundary of the fire air nozzle is handed over from upper furnace and chimney arch
The distance in boundary line is b5, b5More than zero.The setting of multiple fire air nozzles can further strengthen classifired combustion, simultaneously
The uncombusted coal dust later stage is fully burned, then effectively reduce boiler solid-unburning hot loss.
As further preferred, incident angle regulation is equipped with the upper strata tertiary air spout and lower floor's tertiary air spout
Mechanism, the span of the angle between angle adjustable and horizontal plane is 0~45 °.Under different operating modes and coal, incident angle
The auxiliary injection and push effect of adjustable tertiary air change First air and spray into burner hearth position, then adjust coal dust in burner hearth
The position in primary zone, so as to play the main reheat steam temperature of regulation, reduce exhaust gas temperature, prevent lower hearth water-cooling wall heat fatigue, prevent
The effect of front-back wall slagging and raising boiler to coal adaptability.
As further preferred, the multiple fire air nozzle is provided with incident angle governor motion, angle adjustable and water
The span of angle between plane is 20~45 °.Burnt wind is adjusted by governor motion according under different operating modes and coal
The angle of burner hearth is sprayed into, its downward penetration depth can be changed, so as to further improve coal dust later stage after-flame, boiler solid is reduced
Imperfect combustion heat loss.
Further, the incident angle governor motion includes at least two panels guide vane, homogenizing plate, every guide vane
On rotary shaft is installed, the guide vane by rotary shaft be installed on homogenizing plate and tertiary air spout or fire air nozzle it
Between, it is provided with wherein one axle of the rotary shaft on transmission arm, other axles and is mounted on regulating arm, the regulating arm passes through
Link plate is connected with each other, and the transmission arm is provided with pull bar.Fire air nozzle and tertiary air spout incident angle governor motion
Set, can effectively change tertiary air, burnout degree and inject the direction of burner hearth, while can effectively adjust tertiary air, burnout degree sprays into stove
The air quantity of thorax.
The present invention compared with the existing technology has advantages below and effect：1st, ejection grading combustion W fire of the present invention
Flame boiler is arranged by the way that two breeze airflow notch settings are formed together before and after spout group, deep or light phase spout group, while will be dense
Light spout group with overfire air port group on front and rear chimney arch, not only beneficial to coal dust jet early stage catch fire, simultaneously side by side by interlaced arrangement
The timely oxygenating burning after coal powder ignition in stove is also improved, the combustion stability and burn-off rate of coal dust is improved.
2nd, ejection grading combustion W flame boiler of the present invention can encircle the incidence of upper Secondary Air by adjusting in operation
Change First air under angle, the auxiliary injection and push effect of injection, tertiary air in Secondary Air and spray into burner hearth position, i.e.,：Change
Become the position in primary zone in stove, then on the one hand it is possible to prevente effectively from breeze airflow presses close to front-back wall burning, improvement front-back wall knot
Slag situation, on the other hand it is possible to prevente effectively from because breeze airflow undershoot it is too deep caused by lower hearth furnace hopper water-cooling wall occur heat
Drawing crack and booster that fatigue is brought.
3rd, ejection grading combustion W flame boiler of the present invention can effectively be adjusted by the regulation of primary zone upper-lower position
Main reheat steam temperature reaches design load, reduces exhaust gas temperature.
4th, ejection grading combustion W flame boiler of the present invention has stronger adaptability to different coals.
5th, ejection grading combustion W flame boiler of the present invention is by setting arch upper overfire air port, burner hearth front-back wall
Two layers tertiary air spout, upper furnace front-back wall water-cooling wall burn wind snout above and below water-cooling wall, send into air classification, have deepened sky
Gas fractional combustion, effectively reduces fuel type, thermal NOxGeneration, reduction boiler NOxDischarge.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is a kind of section stream for the ejection grading combustion W flame boiler for improving coal powder ignition burning of the present invention
Field schematic diagram (Flow Field Distribution is symmetrical with burner hearth center 2-1 in figure, and each velocity attitude for spraying into gas stream in the stove is marked with arrow)；
Fig. 2 for Fig. 1 C to partial view (figure at the middle and upper levels, lower floor's tertiary air spout and burn wind snout with burner hearth center 2-
1 is that the plane of symmetry is arranged in front-back wall)；
Fig. 3 for Fig. 1 B to partial view (each spout is arranged symmetrically with burner hearth center 2-1 in figure hogging)；
Fig. 4 is Secondary Air angle adjusting mechanism structural representation of the present invention；
Fig. 5 is upper strata of the present invention, lower floor's tertiary air spout and the incident angle governor motion knot for burning wind snout
Structure schematic diagram；
The part for the flexible sealing that Fig. 6 uses for reserving gaps between overfire air port up-and-down boundary and chimney arch water-cooling wall is put
Big view；
Label declaration：1st, upper furnace；2nd, lower hearth；3rd, preceding chimney arch；4th, rear chimney arch；5th, furnace hopper；6th, overfire air port group；
7th, breeze airflow spout group；8th, flexible sealing；9th, upper strata tertiary air spout；10th, lower floor's tertiary air spout；11st, overfire air port；
12nd, thick coal culm air-flow spout；13rd, thin powdered coal air-flow spout；14th, thick coal culm air-flow spout group；15th, thin powdered coal air-flow spout group；
16th, fire air nozzle；21st, rotary shaft；22nd, post-tensioning or layback water screen tube；23rd, vertical water-wall tube；24th, guide vane；25、
Homogenizing plate；26th, link plate；27th, regulating arm；28th, transmission arm；29th, pull bar；31st, bearing；32nd, shaft coupling；33rd, gearbox；34、
Multistage spur gear wheel；35th, stepper motor；2-1, burner hearth center；2-2, burner hearth front water wall；Wall water cooling after 2-3, burner hearth
Wall；2-4, upper furnace and chimney arch boundary line；The forward and backward wall water-cooling wall of 2-5, burner hearth and lower hearth furnace hopper boundary line；2-6, upper stove
Thorax front water wall；2-7, upper furnace rear water wall；2-8, chimney arch and the forward and backward wall water-cooling wall boundary line of burner hearth.
Embodiment
With reference to embodiment, the present invention is described in further detail, following examples be explanation of the invention and
The invention is not limited in following examples.
Embodiment 1：As shown in Figures 1 to 3, the injection classification combustion of a kind of improvement coal powder ignition burning described in the present embodiment 1
Burn W flame boiler, including the burner hearth that upper furnace 1, lower hearth 2, preceding chimney arch 3 and rear chimney arch 4 are constituted, on the preceding chimney arch 3 from
Wall after between burner hearth center 2-1 to burner hearth front water wall 2-2 and in the rear on chimney arch 4 from burner hearth center 2-1 to burner hearth
Multiple overfire air ports, multiple breeze airflow spouts, the multiple overfire air port and multiple coal dusts are set between water-cooling wall 2-3
Air-flow spout is connected with lower hearth 2, and the multiple overfire air port includes multiple overfire air port groups 6, each Secondary Air
The overfire air port 11 that spout group 6 is arranged close to before and after two is constituted；The multiple breeze airflow spout includes multiple coal dusts
Air-flow spout group 7, each breeze airflow spout group 7 by thick coal culm air-flow spout group 14 and with before and after thick coal culm air-flow spout group 14
The thin powdered coal air-flow spout group 15 being arranged close to is constituted, what the thick coal culm air-flow spout group 14 was closely packed together by two or so
Thick coal culm air-flow spout 12 is constituted, and the thin powdered coal air-flow spout group 15 is sprayed by two or so the thin powdered coal being closely packed together air-flows
Mouth 13 is constituted, and multiple overfire air port groups 6 and multiple breeze airflow spout groups 7 are equidistantly handed over side by side along stove cross direction in in-line
The distance of mistake arrangement, the coboundary of the thick coal culm air-flow spout group 14 and the coboundary of overfire air port group 6 is b3, b3It is more than
Equal to zero, the distance of the lower boundary of the thin powdered coal air-flow spout group 15 and the lower boundary of overfire air port group 6 is b4, b4It is more than
Zero, the coboundary of overfire air port group 6 from a distance from the boundary line 2-4 of chimney arch and upper furnace be b1, b1More than zero, described two
The secondary lower boundary of wind snout group 6 is from the distance between the boundary line 2-8 of the forward and backward wall water-cooling wall of burner hearth and chimney arch b2, b2More than zero.
Embodiment 2：As shown in Figure 1 to Figure 3, the injection classification of a kind of improvement coal powder ignition burning described in the present embodiment 2
Burn W flame boiler, and the difference with embodiment 1 is that the front water wall 2-6 and rear water wall 2-7 of upper furnace 1 are provided with
Multiple fire air nozzles 16, the fire air nozzle 16 is equidistantly arranged side by side along stove cross direction in in-line, the burnout degree
The lower boundary of spout 16 is from being b with a distance from upper furnace 1 and chimney arch boundary line 2-45, b5More than zero, the front water wall 2-2 of burner hearth
Be symmetrical arranged upper strata tertiary air spout 9 and lower floor's tertiary air spout 10 on rear water wall 2-3, upper strata tertiary air spout 9, under
Layer tertiary air spout 10 is equidistantly arranged side by side along stove cross direction in in-line, the lower boundary of the upper strata tertiary air spout 9 and
The distance between coboundary of lower floor's tertiary air spout 10 is b7, b7More than zero, the coboundary of the upper strata tertiary air spout 9 from
The distance between boundary line 2-8 of the forward and backward wall water-cooling wall of burner hearth and chimney arch is b6, b6More than zero, lower floor's tertiary air spout 10
Lower boundary from being b with a distance from the boundary line 2-5 of the forward and backward wall water-cooling wall of burner hearth and the furnace hopper 5 of lower hearth 28, b8More than zero.Its
In, wall water after the setting of multiple fire air nozzles 16, burner hearth front water wall 2-2, burner hearth on the forward and backward wall water-cooling wall of upper furnace 1
Upper strata tertiary air spout 9, the setting of lower floor's tertiary air spout 10 make the multistage feeding of air point on cold wall 2-3, have further deepened W
The fractional combustion of pot furnace air, effectively reduces solid-unburning hot loss in boiler, reduces NOxDischarge.
Embodiment 3：As shown in Figures 1 to 6, the present embodiment 3 and the difference of embodiment 2 are, multiple breeze airflow spouts
Group 7 is fixedly mounted to the centroclinal certain angle of burner hearth, and the angle of setting angle and center line is α, and α span is 5
~10 °, multiple overfire air port groups 6 are provided with Secondary Air angle adjusting mechanism, and the Secondary Air angle adjusting mechanism includes step
Stepper motor 35, shaft coupling 32, gearbox 33, multistage spur gear wheel 34, overfire air port 11 is fixed on secondary by bearing 31
In bellows, overfire air port group 6 is connected with multistage spur gear wheel 34, and multistage spur gear wheel 34 is arranged at gearbox 33
Interior, the gearbox 33 is connected by shaft coupling 32 with stepper motor 35, the overfire air port 11 and chimney arch water-cooling wall it
Between be provided with gap, the gap is provided with flexible sealing 8, the angle adjustable scope of the multiple overfire air port group 6 for -5~
20 °, the multiple fire air nozzle 16 is provided with incident angle governor motion, and angle between angle adjustable and horizontal plane takes
It is that incident angle regulation machine is equipped with 20~45 °, the upper strata tertiary air spout 9 and lower floor's tertiary air spout 10 to be worth scope
Structure, the span of the angle between angle adjustable and horizontal plane is 0~45 °, and the incident angle governor motion is included at least
Rotary shaft 21 is installed, the guide vane 24 is by rotating on two panels guide vane 24, homogenizing plate 25, every guide vane 24
Axle 21 is installed between homogenizing plate 25 and tertiary air spout or fire air nozzle, is installed on wherein one axle of the rotary shaft 21
Have and regulating arm 27 is mounted on transmission arm 28, other axles, the regulating arm 27 is connected with each other by link plate 26, the transmission
Arm 28 is provided with pull bar 29, and the tertiary air spout or fire air nozzle are by post-tensioning or layback water screen tube 22 and vertical water wall
Pipe 23 is constituted.
A kind of ejection grading combustion W flame boiler of improvement coal powder ignition burning described in this implementation 3 is in actual motion mistake
Cheng Zhong, breeze airflow is sprayed into stove with fixed angle, on arch Secondary Air by Secondary Air incident angle governor motion adjust into
Two layers of tertiary air wind direction is adjustable on firing angle degree, the forward and backward wall water-cooling wall of burner hearth, in operation, when coal and operating condition change,
Under Secondary Air injection, tertiary air auxiliary injection and push effect, it can be changed by adjusting the incident angle of Secondary Air and tertiary air
Become the position that breeze airflow sprays into burner hearth, then adjust primary zone position.Specifically, when discovery front-back wall slagging is serious, flame
Undershoot is excessive cause lower hearth water-cooling wall overtemperature to occur heat fatigue, big slag phosphorus content are high and main reheat steam temperature is less than design
During value problem, it can be added by the angle that Secondary Air incident angle governor motion makes Secondary Air enter directive burner hearth center 2-1 on chimney arch
Greatly, increase a wind direction burner hearth center 2-1 angle excursion by Secondary Air ejector action, while being aided with tertiary air incidence and water
Plane included angle diminishes, increase tertiary air to penetrated above and below arch wind powder to burner hearth center 2-1 push effect and reduce its downwards it is secondary
Ejector action, makes coal dust be burnt away from front-back wall by both the above means, improves front-back wall slagging, while making coal dust primary zone
Water-cooling wall and primary zone position away from furnace hopper 5 are improved, and furnace hopper slope water-cooling wall overtemperature can be prevented, while improving main reheating
Steam reaches design load.In addition, when unburned carbon in flue dust height, high fume temperature and main reheated steam overtemperatute in discovery stove
When, the angle that by the upper Secondary Air incident angle governor motion of arch Secondary Air can be made to enter directive burner hearth center 2-1 reduces, and passes through two
Secondary wind ejector action reduces a wind direction burner hearth center 2-1 angle excursion, while being aided with tertiary air incidence and horizontal plane angle
Increase, reduces tertiary air to penetrating wind powder above and below arch to burner hearth center 2-1 push effect and increasing its downward secondary injection effect,
Flame kernel is moved down by both the above means, the reduction of coal dust primary zone position increases coal dust total kilometres and stop in stove
Time, reduce main reheated steam overtemperature, while the effectively winged phosphorus content of reduction exhaust gas temperature and ash.
Furthermore, it is necessary to explanation, the specific embodiment described in this specification, is named the shape of its parts and components
Title etc. can be different.The equivalent or simple change that all construction, feature and principles according to described in inventional idea of the present invention are done, is wrapped
Include in the protection domain of patent of the present invention.Those skilled in the art can be to described specific implementation
Example is made various modifications or supplement or substituted using similar mode, structure without departing from the present invention or surmounts this
Scope as defined in the claims, all should belong to protection scope of the present invention.
Claims (9)
- Improve the ejection grading combustion W flame boiler of coal powder ignition burning 1. a kind of, including it is upper furnace (1), lower hearth (2), preceding The burner hearth that chimney arch (3) and rear chimney arch (4) are constituted, from burner hearth center (2-1) to burner hearth front water wall on the preceding chimney arch (3) It is between (2-2) and many from burner hearth center (2-1) to setting burner hearth rear water wall (2-3) on chimney arch (4) in the rear Individual overfire air port, multiple breeze airflow spouts, the multiple overfire air port and multiple breeze airflow spouts are and lower hearth (2) it is connected, it is characterised in that the multiple overfire air port is made up of multiple overfire air port groups (6), each Secondary Air spray The overfire air port (11) that mouth group (6) is arranged close to before and after two is constituted；The multiple breeze airflow spout includes multiple coals Powder air-flow spout group (7), each breeze airflow spout group (7) by thick coal culm air-flow spout group (14) and with thick coal culm air-flow spout The thin powdered coal air-flow spout group (15) being arranged close to before and after group (14) is constituted, and the thick coal culm air-flow spout group (14) is by two left sides The thick coal culm air-flow spout (12) that the right side is closely packed together is constituted, and the thin powdered coal air-flow spout group (15) is abutted against by two or so Thin powdered coal air-flow spout (13) together is constituted, the multiple overfire air port group (6) and multiple breeze airflow spout group (7) edges Stove cross direction is in the equidistant interlaced arrangement side by side of in-line；Upper strata tertiary air spout (9) and lower floor three are symmetrical arranged on the front water wall (2-2) and rear water wall (2-3) of burner hearth Secondary wind snout (10), the upper strata tertiary air spout (9), lower floor's tertiary air spout (10) are equidistant in in-line along stove cross direction It is arranged side by side, the distance between the lower boundary of the upper strata tertiary air spout (9) and the coboundary of lower floor's tertiary air spout (10) For b7, b7More than zero, the coboundary of the upper strata tertiary air spout (9) is from the forward and backward wall water-cooling wall of burner hearth and the boundary line of chimney arch The distance between (2-8) is b6, b6More than zero, the lower boundary of lower floor's tertiary air spout (10) is from the forward and backward wall water-cooling wall of burner hearth Distance with the boundary line (2-5) of the furnace hopper (5) of lower hearth (2) is b8, b8More than zero.
- 2. a kind of ejection grading combustion W flame boiler of improvement coal powder ignition burning according to claim 1, its feature exists In the distance of the coboundary of the thick coal culm air-flow spout group (14) and the coboundary of overfire air port group (6) is b3, b3It is more than Equal to zero, the distance of the lower boundary of the thin powdered coal air-flow spout group (15) and the lower boundary of overfire air port group (6) is b4, b4 More than zero.
- 3. a kind of ejection grading combustion W flame boiler of improvement coal powder ignition burning according to claim 2, its feature exists In, overfire air port group (6) coboundary from being b with a distance from the boundary line (2-4) of chimney arch and upper furnace1, b1More than zero, institute Overfire air port group (6) lower boundary is stated from the distance between the boundary line (2-8) of the forward and backward wall water-cooling wall of burner hearth and chimney arch b2, b2Greatly In zero.
- 4. a kind of ejection grading combustion W flame boiler of improvement coal powder ignition burning according to claim 1 or 3, it is special Levy and be, the multiple breeze airflow spout group (7) is fixedly mounted to the centroclinal certain angle of stove, setting angle and center The angle of line is α, and α span is 5~10 °；The multiple overfire air port group (6) is provided with Secondary Air angular adjustment machine Structure, the angle adjustable scope of the multiple overfire air port group (6) is -5~20 °, the overfire air port (11) and chimney arch water Gap is provided between cold wall, the gap is provided with flexible sealing (8).
- 5. a kind of ejection grading combustion W flame boiler of improvement coal powder ignition burning according to claim 4, its feature exists In the Secondary Air angle adjusting mechanism includes stepper motor (35), shaft coupling (32), gearbox (33), multistage cylindrical straight gear Take turns (34), the overfire air port (11) is fixed in secondary air box by bearing (31), the overfire air port group (6) with it is many Level spur gear wheel (34) is connected, and multistage spur gear wheel (34) is arranged in gearbox (33), and the gearbox (33) is led to Shaft coupling (32) is crossed with stepper motor (35) to be connected.
- 6. a kind of ejection grading combustion W flame boiler of improvement coal powder ignition burning according to claim 5, its feature exists In the front water wall (2-6) and rear water wall (2-7) of upper furnace (1) are provided with multiple fire air nozzles (16), the combustion Wind snout (16) to the greatest extent is equidistantly arranged side by side along stove cross direction in in-line, and the lower boundary of the fire air nozzle (16) is from upper stove The distance of thorax (1) and chimney arch boundary line (2-4) is b5, b5More than zero.
- 7. a kind of ejection grading combustion W flame boiler of improvement coal powder ignition burning according to claim 6, its feature exists In the multiple fire air nozzle (16) is provided with incident angle governor motion, the angle between angle adjustable and horizontal plane Span is 20~45 °.
- 8. a kind of ejection grading combustion W flame boiler of improvement coal powder ignition burning according to claim 7, its feature exists In being equipped with incident angle governor motion, angle adjustable on the upper strata tertiary air spout (9) and lower floor's tertiary air spout (10) The span of angle between horizontal plane is 0~45 °.
- 9. a kind of ejection grading combustion W flame boiler of improvement coal powder ignition burning according to claim 8, its feature exists In the incident angle governor motion is included at least two panels guide vane (24), homogenizing plate (25), every guide vane (24) Rotary shaft (21) is installed, the guide vane (24) by rotary shaft (21) be installed on homogenizing plate (25) and tertiary air spout or Between fire air nozzle, it is provided with transmission arm (28), other axles and is mounted on wherein one axle of the rotary shaft (21) Regulating arm (27), the regulating arm (27) is connected with each other by link plate (26), and the transmission arm (28) is provided with pull bar (29).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410849563.8A CN104595892B (en) | 2014-12-30 | 2014-12-30 | Improve the ejection grading combustion W flame boiler of coal powder ignition burning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410849563.8A CN104595892B (en) | 2014-12-30 | 2014-12-30 | Improve the ejection grading combustion W flame boiler of coal powder ignition burning |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104595892A CN104595892A (en) | 2015-05-06 |
| CN104595892B true CN104595892B (en) | 2017-11-03 |
Family
ID=53121845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410849563.8A Active CN104595892B (en) | 2014-12-30 | 2014-12-30 | Improve the ejection grading combustion W flame boiler of coal powder ignition burning |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104595892B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104913299A (en) * | 2015-06-01 | 2015-09-16 | 东南大学 | W flame boiler burner and air distribution method thereof |
| CN105605563A (en) * | 2016-01-25 | 2016-05-25 | 中国大唐集团科学技术研究院有限公司华东分公司 | Water wall high-temperature corrosion monitoring and control device and method for wall type tangentially-fired boiler |
| CN107228358B (en) * | 2017-07-04 | 2024-01-30 | 北京巴布科克·威尔科克斯有限公司 | Double-step arched W-flame boiler hearth structure |
| CN107606601B (en) * | 2017-08-23 | 2019-07-12 | 清华大学 | A kind of interior method for organizing that burns of opposed firing pulverized-coal fired boiler furnace |
| CN107606604B (en) * | 2017-10-26 | 2024-05-03 | 贵州电网有限责任公司电力科学研究院 | Variable arch angle W-shaped flame boiler |
| CN108386832B (en) * | 2018-01-12 | 2019-10-11 | 宁波大学 | A kind of side wall dominates the efficient after-flame W flame boiler of low nitrogen of symmetrical combustion |
| CN110107911B (en) * | 2019-04-30 | 2023-09-08 | 华电电力科学研究院有限公司 | Secondary air system for opposed firing boiler and working method thereof |
| CN114777111B (en) * | 2022-05-17 | 2022-11-25 | 哈尔滨工业大学 | British bar type W flame boiler device and method for gasification coupled combustion |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101368725A (en) * | 2008-09-27 | 2009-02-18 | 哈尔滨工业大学 | Stable combustion anti-slag gap type W-shaped flame boiler apparatus |
| CN101694295A (en) * | 2009-10-30 | 2010-04-14 | 哈尔滨工业大学 | W-shaped flame boiler disposing aperture type over-fire air spouts on stove arch |
| CN101832549A (en) * | 2010-04-19 | 2010-09-15 | 哈尔滨工业大学 | Multi-ejection grading combustion method and W flame boiler device for realizing same |
| CN102297420A (en) * | 2011-08-15 | 2011-12-28 | 哈尔滨工业大学 | Ejecting staged combustion W-flame boiler with thin pulverized coal air flow drawn to bottom |
| CN204420990U (en) * | 2014-12-30 | 2015-06-24 | 华电电力科学研究院 | A kind of ejection grading combustion W flame boiler improving coal powder ignition burning |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2667425B2 (en) * | 1988-02-04 | 1997-10-27 | バブコツク日立株式会社 | Combustion air supply method and apparatus |
-
2014
- 2014-12-30 CN CN201410849563.8A patent/CN104595892B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101368725A (en) * | 2008-09-27 | 2009-02-18 | 哈尔滨工业大学 | Stable combustion anti-slag gap type W-shaped flame boiler apparatus |
| CN101694295A (en) * | 2009-10-30 | 2010-04-14 | 哈尔滨工业大学 | W-shaped flame boiler disposing aperture type over-fire air spouts on stove arch |
| CN101832549A (en) * | 2010-04-19 | 2010-09-15 | 哈尔滨工业大学 | Multi-ejection grading combustion method and W flame boiler device for realizing same |
| CN102297420A (en) * | 2011-08-15 | 2011-12-28 | 哈尔滨工业大学 | Ejecting staged combustion W-flame boiler with thin pulverized coal air flow drawn to bottom |
| CN204420990U (en) * | 2014-12-30 | 2015-06-24 | 华电电力科学研究院 | A kind of ejection grading combustion W flame boiler improving coal powder ignition burning |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104595892A (en) | 2015-05-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104595892B (en) | Improve the ejection grading combustion W flame boiler of coal powder ignition burning | |
| CN100491821C (en) | Dense-phase back-flushing multiple level NOx combustion method | |
| CN104791772B (en) | Low-nitrogen combustion stokerfeed boiler with two-stage smoke recirculation function | |
| CN207975627U (en) | It is suitable for using the 660MW grade ultra-supercritical boilers of high alkalinity coal | |
| CN104990069B (en) | A kind of combustion system for improving Opposite Firing Boiler security and economy | |
| CN202884901U (en) | Boiler capable of realizing reignition of exhaust gas coal powder by using high-temperature flue gas and reducing NOx | |
| CN206222353U (en) | With the new direct-firing large-scale oxygen-enriched combustion system of fuel pulverizing plant anthracite | |
| CN204420990U (en) | A kind of ejection grading combustion W flame boiler improving coal powder ignition burning | |
| CN103697465A (en) | Boiler capable of achieving reignition of exhaust gas coal powder and reducing NOx by using high-temperature flue gas | |
| CN106195993B (en) | A kind of outlet method of river diversion of tower boiler, mechanism and boiler | |
| CN202082915U (en) | W-shape flame boiler with grading secondary air layout structure | |
| CN106247322B (en) | The W flame boiler that a kind of lack of gas windage yaw is put | |
| CN206257656U (en) | Chain furnace system | |
| CN104654292B (en) | Space shade type straight-through pulverized coal burner | |
| CN205014343U (en) | W flame boiler | |
| CN104154532A (en) | Center air ring concentrated type turbulent burner | |
| CN103206716A (en) | Multi-coal-type adaptive type low-NOx burning system | |
| CN202101217U (en) | Biomass steam boiler with horizontal water and fire tubes | |
| CN204786354U (en) | Combustion system of wall opposed firing boiler security and economic nature around improving | |
| CN103090406B (en) | Biomass boiler | |
| CN201561415U (en) | Steam boiler | |
| CN202328328U (en) | Biomass boiler | |
| CN106439792B (en) | Chain furnace system and mode chain furnace combustion method | |
| CN205372606U (en) | System for deep or light separation of tertiary air reduces boiler NOx and discharges | |
| CN203642167U (en) | W flame boiler with multiple over-fire air nozzles |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |