CN204420990U - A kind of ejection grading combustion W flame boiler improving coal powder ignition burning - Google Patents
A kind of ejection grading combustion W flame boiler improving coal powder ignition burning Download PDFInfo
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- CN204420990U CN204420990U CN201420866584.6U CN201420866584U CN204420990U CN 204420990 U CN204420990 U CN 204420990U CN 201420866584 U CN201420866584 U CN 201420866584U CN 204420990 U CN204420990 U CN 204420990U
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Abstract
The utility model relates to a kind of ejection grading combustion W flame boiler improving coal powder ignition burning, this W flame boiler comprises upper furnace, lower hearth, the burner hearth that front chimney arch and rear chimney arch are formed, be arranged at the multiple overfire air port groups on front chimney arch and rear chimney arch, multiple breeze airflow spout group, multiple overfire air port group and multiple breeze airflow spout group are the equidistant interlaced arrangement side by side of in-line along stove cross direction, multiple breeze airflow spout group can be installed on chimney arch with fixed angle, the incident angle of Secondary Air is adjustable, the fire air nozzle that upper furnace can establish multiple incident angle adjustable, before burner hearth, the tertiary air spout that rear water wall can establish two-layer incident angle adjustable.W flame boiler described in the utility model can effectively improve coal dust firing in stove, improves boiler to the adaptive capacity of coal, and effectively the main reheat steam temperature of adjustment reaches design load, reduces NO
xdischarge and exhaust gas temperature, prevent front-back wall slagging scorification, avoid furnace hopper water-cooling wall to occur heat fatigue.
Description
Technical field
The utility model relates to W flame technical field of boiler combustion, is specifically related to a kind ofly effectively to improve coal powder ignition burning and the ejection grading combustion W flame boiler of primary zone position-adjustable in W flame boiler.
Background technology
Coal is topmost primary energy in China's current and following significant period of time, and wherein thermal power generation coal is one of major way of utilizing of coal in China.According to China's fuel policy and using energy source situation, anthracite and meager coal proportion in boilers of power plants coal amount up to 40% ~ 50%, and will to strengthen in future further.For realizing efficiently using anthracite and meager coal, abroad developing and a kind ofly aiming at the W flame type of furnace using anthracite and meager coal, China started to introduce W flame boiler from external on a large scale from late 1980s, and was in recent years obtaining widespread adoption.
" W " flame boiler is held business by technology and is divided into Foster Wheeler W flame boiler, Ba Wei W flame boiler, Si Tanyin W flame boiler and bucket bar W flame boiler.About bucket bar " W " stove, the at present domestic multiple stage and mostly be subcritical boiler of having put into operation, super critical boiler then only has Zhenxiong, Yunnan and Guizhou Tang Zhai tetra-, and wherein Tang Zhai two W flame boilers in Guizhou are the multistage ejection grading combustion technology burner of China's independent research.The ruuning situation summing up bucket bar technology and China's bucket bar technology W flame boiler is seen, it exists problems, as coal dust jet catch fire late, combustion stability is poor, slagging scorification serious (comprising side wall and front-back wall etc.), after-flame are poor, NO
xdischarge and highly (be generally 1100 ~ 1700mg/m
3(rolling over 6% oxygen)), although Chinese scholar develops the novel burner of autonomous property right for the problems referred to above, but ruuning situation shows, still there is reheat steam temperature off-design value in " W " flame boiler, burn-off rate is low, combustion stability is poor, high fume temperature, NO
xdischarge and ash content carbon is high, front-back wall slagging scorification seriously, flame undershoot causes greatly furnace hopper water-cooling wall to occur the problems such as heat fatigue drawing crack and booster.Based on this, for realizing the safe and stable operation of the W flame boiler based on bucket bar technology, be necessary for the problems referred to above optimizing combustor structure and firing optimization mode.
Utility model content
Technical problem to be solved in the utility model is to provide one and effectively can improves coal powder ignition burning, the effectively main reheat steam temperature of adjustment and reach design load, reduce boiler ash phosphorus content, prevent front-back wall slagging scorification, prevent furnace hopper water-cooling wall from occurring heat fatigue, reducing NO
xthe ejection grading combustion W flame boiler of discharge capacity and exhaust gas temperature.
The utility model solves the problems of the technologies described above adopted technical scheme: a kind of ejection grading combustion W flame boiler improving coal powder ignition burning, comprise upper furnace, lower hearth, the burner hearth that front chimney arch and rear chimney arch are formed, on front chimney arch from burner hearth center to burner hearth front water wall and on rear chimney arch from burner hearth center to burner hearth rear water wall multiple overfire air port is set, multiple breeze airflow spout, described multiple overfire air port is all connected with lower hearth with multiple breeze airflow spout, described multiple overfire air port is made up of multiple overfire air port group, each overfire air port group is made up of near the overfire air port arranged two front and back, described multiple breeze airflow spout comprises multiple breeze airflow spout group, each breeze airflow spout group by thick coal culm air-flow spout group and with thick coal culm air-flow spout group before and after form near the thin powdered coal air-flow spout group of arranging, described thick coal culm air-flow spout group is made up of the thick coal culm air-flow spout that about two abut against together, described thin powdered coal air-flow spout group is made up of the thin powdered coal air-flow spout that about two abut against together, and described multiple overfire air port group and multiple breeze airflow spout group are the equidistant interlaced arrangement side by side of in-line along stove cross direction.Ejection grading combustion W flame boiler described in the utility model, arrange close before and after thick coal culm air-flow spout group and thin powdered coal air-flow spout group, can strengthen thick coal culm catch fire after impact on thin powdered coal, then make thin powdered coal catch fire to be more prone to, pulverized coal particle burn-up efficiency improve further.Simultaneously, due to the setting of multiple breeze airflow spout group be made up of thick coal culm air-flow spout group and thin powdered coal air-flow spout group, the overall coal dust amount of First air in W flame boiler is improved, and then to make in stove coal dust to catch fire early stage heat Relatively centralized, coal powder ignition is comparatively easy.In addition, be in-line equidistantly interlaced arrangement side by side by multiple breeze airflow spout group and multiple overfire air port group along stove cross direction, the ejector action of Secondary Air to breeze airflow can be strengthened, also be conducive to the timely oxygenating after coal powder ignition simultaneously, and then further increase the combustion stability after coal powder ignition.
As preferably, the distance of the described coboundary of thick coal culm air-flow spout group and the coboundary of overfire air port group is b
3, b
3be more than or equal to zero, the distance of the described lower boundary of thin powdered coal air-flow spout group and the lower boundary of overfire air port group is b
4, b
4be greater than zero.Multiple thick coal culm air-flow spout group and multiple thin powdered coal air-flow spout group are accommodated in multiple overfire air port group, the timely oxygenating burning of Secondary Air after can breeze airflow being promoted further to catch fire, also improve the ejector action of Secondary Air to breeze airflow, Secondary Air unnecessary between front-back wall water-cooling wall and breeze airflow plays and reduces the effect that front-back wall water-cooled wall temperature prevents slagging scorification simultaneously.
As preferably, the coboundary of described overfire air port group is b from the distance of the boundary line of chimney arch and upper furnace
1, b
1be greater than zero, the lower boundary of described overfire air port group is from the distance b between the forward and backward wall water-cooling wall of burner hearth and the boundary line of chimney arch
2, b
2be greater than zero.
As preferably, described multiple breeze airflow spout group is to the centroclinal certain angle fixed installation of stove, the angle of setting angle and center line is α, the span of α is 5 ~ 10 °, described multiple overfire air port group is provided with Secondary Air angle adjusting mechanism, the angle adjustable scope of described multiple overfire air port group is-5 ~ 20 °, and be provided with gap between described overfire air port and chimney arch water-cooling wall, described gap is provided with flexible sealing.Multiple breeze airflow spout groups of W flame boiler installed with fixing angle, overfire air port group carries out angular adjustment by Secondary Air angle adjusting mechanism simultaneously.In W flame boiler running process, breeze airflow sprays in stove with fixing angle, but by the ejector action under the different incidence angles degree of adjustment Secondary Air, can change the position that breeze airflow sprays into burner hearth.The setting in gap between the up-and-down boundary of overfire air port and chimney arch water-cooling wall, object is to ensure the adjustable of overfire air port.
As preferred further, Secondary Air angle adjusting mechanism comprises stepper motor, shaft coupling, gearbox, multistage spur gear wheel, described overfire air port is fixed in secondary air box by bearing, described overfire air port group is connected with multistage spur gear wheel, multistage spur gear wheel is arranged in gearbox, and described gearbox is connected with stepper motor by shaft coupling.In W flame boiler running process, each overfire air port group adopts stepper motor to realize the fine adjustment before and after overfire air port group between-5 to 20 ° by multistage spur gear wheel.
As preferably, the front water wall of described burner hearth and rear water wall are symmetrical arranged upper strata tertiary air spout and lower floor's tertiary air spout, upper strata tertiary air spout, lower floor's tertiary air spout are that in-line is equidistantly arranged side by side along stove cross direction, and the distance between the lower boundary of described upper strata tertiary air spout and the coboundary of lower floor's tertiary air spout is b
7, b
7be greater than zero, the coboundary of described upper strata tertiary air spout is b from the distance between the forward and backward wall water-cooling wall of burner hearth and the boundary line of chimney arch
6, b
6be greater than zero, the lower boundary of described lower floor tertiary air spout is b from the distance of the boundary line of the furnace hopper of the forward and backward wall water-cooling wall of burner hearth and lower hearth
8, b
8be greater 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, suppresses NO
xgeneration.
As preferably, the front water wall of upper furnace and rear water wall are provided with multiple fire air nozzle, and described fire air nozzle is that in-line is equidistantly arranged side by side along stove cross direction, and the lower boundary of described fire air nozzle is b from the distance of upper furnace and chimney arch boundary line
5, b
5be greater than zero.The setting of multiple fire air nozzle can strengthen classifired combustion further, makes the uncombusted coal dust later stage be fully burned simultaneously, then effectively reduces boiler solid-unburning hot loss.
As preferred further, described upper strata tertiary air spout and lower floor's tertiary air spout are equipped with incident angle governor motion, and the span of the angle between angle adjustable and horizontal plane is 0 ~ 45 °.Under different operating mode and coal, the auxiliary injection of the adjustable tertiary air of incident angle and push effect change First air and spray into burner hearth position, then regulate the position in coal dust primary zone in burner hearth, thus play the main reheat steam temperature of adjustment, reduce exhaust gas temperature, prevent lower hearth water-cooling wall heat fatigue, prevent front-back wall slagging scorification and improve boiler to the effect of coal adaptive capacity.
As preferred further, described multiple fire air nozzle is provided with incident angle governor motion, and the span of the angle between angle adjustable and horizontal plane is 20 ~ 45 °.Burnt wind sprays into the angle of burner hearth according to adjustment under different operating mode and coal by governor motion, can change the penetration depth that it is downward, thus improves coal dust later stage after-flame further, reduces boiler solid-unburning hot loss.
Further, described incident angle governor motion comprises at least two panels guide vane, homogenizing plate, every sheet guide vane is provided with turning cylinder, described guide vane is installed between homogenizing plate and tertiary air spout or fire air nozzle by turning cylinder, a wherein axle of described turning cylinder is provided with transmission arm, other axle is all provided with regulating arm, and described regulating arm is interconnected by link plate, and described transmission arm is provided with pull bar.The setting of fire air nozzle and tertiary air spout incident angle governor motion, can effectively change tertiary air, direction that burnout degree injects burner hearth, can effectively regulate tertiary air, air quantity that burnout degree sprays into burner hearth simultaneously.
The utility model compared with the existing technology has the following advantages and effect: 1, ejection grading combustion W flame boiler described in the utility model is arranged by being arranged by two breeze airflow spouts to be formed together before and after spout group, deep or light phase spout group, simultaneously by deep or light spout group and overfire air port group side by side interlaced arrangement on the chimney arch of front and back, not only be beneficial to coal dust jet to catch fire early stage, also improve the timely oxygenating burning in stove after coal powder ignition simultaneously, improve combustion stability and the burn-off rate of coal dust.
2, ejection grading combustion W flame boiler described in the utility model is in operation by regulating the incident angle encircleing upper Secondary Air, under the injection of Secondary Air, the auxiliary injection of tertiary air and push effect, change First air spray into burner hearth position, that is: the position in primary zone in stove is changed, then breeze airflow can be effectively avoided to press close to front-back wall burning on the one hand, improving front-back wall slagging scorification situation, effectively can avoiding on the other hand because breaking through dark under breeze airflow that the drawing crack that heat fatigue is brought and booster appear in lower hearth furnace hopper water-cooling wall that is that cause.
3, ejection grading combustion W flame boiler described in the utility model effectively adjusts main reheat steam temperature by the adjustment of primary zone upper-lower position and reaches design load, reduces exhaust gas temperature.
4, ejection grading combustion W flame boiler described in the utility model has stronger adaptive capacity to different coals.
5, ejection grading combustion W flame boiler described in the utility model is by arranging arch upper overfire air port, the upper and lower two-layer tertiary air spout of burner hearth front-back wall water-cooling wall, upper furnace front-back wall water-cooling wall burnt wind spout, air classification is sent into, deepen Researched of Air Staging Combustion Burning Pulverized Coal, effectively reduce fuel type, thermal NO
xgenerate, reduce boiler NO
xdischarge.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of flow field, cross section schematic diagram (in figure, Flow Field Distribution is symmetrical with burner hearth center 2-1, and the velocity attitude respectively spraying into gas stream in the stove all marks with arrow) improving the ejection grading combustion W flame boiler of coal powder ignition burning described in the utility model;
Fig. 2 be Fig. 1 C to partial view (figure at the middle and upper levels, lower floor's tertiary air spout and burnt wind spout with burner hearth center 2-1 for the plane of symmetry is arranged at front-back wall);
Fig. 3 is that the B of Fig. 1 is to partial view (in figure hogging, each spout is arranged symmetrically with burner hearth center 2-1);
Fig. 4 is Secondary Air angle adjusting mechanism structural representation described in the utility model;
Fig. 5 is the incident angle governor motion structural representation of upper strata described in the utility model, lower floor's tertiary air spout and burnt wind spout;
Fig. 6 is the partial enlarged view of the flexible sealing that between overfire air port up-and-down boundary and chimney arch water-cooling wall, reserving gaps adopts;
Label declaration: 1, upper furnace; 2, lower hearth; 3, front chimney arch; 4, rear chimney arch; 5, furnace hopper; 6, overfire air port group; 7, breeze airflow spout group; 8, flexible sealing; 9, upper strata tertiary air spout; 10, lower floor's tertiary air spout; 11, overfire air port; 12, thick coal culm air-flow spout; 13, thin powdered coal air-flow spout; 14, thick coal culm air-flow spout group; 15, thin powdered coal air-flow spout group; 16, fire air nozzle; 21, turning cylinder; 22, post-tensioning or layback water screen tube; 23, vertical water-wall tube; 24, guide vane; 25, homogenizing plate; 26, link plate; 27, regulating arm; 28, transmission arm; 29, pull bar; 31, bearing; 32, shaft coupling; 33, gearbox; 34, multistage spur gear wheel; 35, stepper motor; 2-1, burner hearth center; 2-2, burner hearth front water wall; 2-3, burner hearth rear water 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 furnace front water wall; 2-7, upper furnace rear water wall; 2-8, chimney arch and burner hearth forward and backward wall water-cooling wall boundary line.
Detailed description of the invention
Be described in further detail the utility model below in conjunction with embodiment, following examples are that the utility model is not limited to following examples to explanation of the present utility model.
Embodiment 1: as shown in Figures 1 to 3, a kind of ejection grading combustion W flame boiler improving coal powder ignition burning described in the present embodiment 1, comprise upper furnace 1, lower hearth 2, the burner hearth that front chimney arch 3 and rear chimney arch 4 are formed, described front chimney arch 3 arranges multiple overfire air port from burner hearth center 2-1 to burner hearth front water wall 2-2 and in the rear chimney arch 4 from burner hearth center 2-1 to burner hearth rear water wall 2-3, multiple breeze airflow spout, described multiple overfire air port is all connected with lower hearth 2 with multiple breeze airflow spout, described multiple overfire air port comprises multiple overfire air port group 6, each overfire air port group 6 is made up of near the overfire air port 11 arranged two front and back, described multiple breeze airflow spout comprises multiple breeze airflow 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 group 14 before and after form near the thin powdered coal air-flow spout group 15 of arranging, described thick coal culm air-flow spout group 14 is made up of the thick coal culm air-flow spout 12 that about two abut against together, described thin powdered coal air-flow spout group 15 is made up of the thin powdered coal air-flow spout 13 that about two abut against together, multiple overfire air port group 6 and multiple breeze airflow spout group 7 are the equidistant interlaced arrangement side by side of in-line along stove cross direction, the distance of the described coboundary of thick coal culm air-flow spout group 14 and the coboundary of overfire air port group 6 is b
3, b
3be more than or equal to zero, the distance of the described lower boundary of thin powdered coal air-flow spout group 15 and the lower boundary of overfire air port group 6 is b
4, b
4be greater than zero, described overfire air port group 6 coboundary is b from the distance of the boundary line 2-4 of chimney arch and upper furnace
1, b
1be greater than zero, described overfire air port group 6 lower boundary is from the distance b between the forward and backward wall water-cooling wall of burner hearth and the boundary line 2-8 of chimney arch
2, b
2be greater than zero.
Embodiment 2: as shown in Figure 1 to Figure 3, a kind of ejection grading combustion W flame boiler improving coal powder ignition burning described in the present embodiment 2, be with the difference of embodiment 1, the front water wall 2-6 of upper furnace 1 and rear water wall 2-7 is provided with multiple fire air nozzle 16, described fire air nozzle 16 is that in-line is equidistantly arranged side by side along stove cross direction, and the lower boundary of described fire air nozzle 16 is b from upper furnace 1 and the distance of chimney arch boundary line 2-4
5, b
5be greater than zero, the front water wall 2-2 of burner hearth and rear water wall 2-3 is symmetrical arranged upper strata tertiary air spout 9 and lower floor's tertiary air spout 10, upper strata tertiary air spout 9, lower floor's tertiary air spout 10 are that in-line is equidistantly arranged side by side along stove cross direction, and the distance between the lower boundary of described upper strata tertiary air spout 9 and the coboundary of lower floor's tertiary air spout 10 is b
7, b
7be greater than zero, the coboundary of described upper strata tertiary air spout 9 is b from the distance between the forward and backward wall water-cooling wall of burner hearth and the boundary line 2-8 of chimney arch
6, b
6be greater than zero, the lower boundary of described lower floor tertiary air spout 10 is b from the distance of the boundary line 2-5 of the furnace hopper 5 of the forward and backward wall water-cooling wall of burner hearth and lower hearth 2
8, b
8be greater than zero.Wherein, the setting of multiple fire air nozzle 16 on upper furnace 1 forward and backward wall water-cooling wall, on burner hearth front water wall 2-2, burner hearth rear water wall 2-3, the setting of upper strata tertiary air spout 9, lower floor's tertiary air spout 10 makes air divide multistage feeding, the further fractional combustion having deepened W pot furnace air, effectively reduces solid-unburning hot loss in boiler, reduces NO
xdischarge.
Embodiment 3: as shown in Figures 1 to 6, the present embodiment 3 is with the difference of embodiment 2, multiple breeze airflow spout group 7 is to the centroclinal certain angle fixed installation of burner hearth, the angle of setting angle and center line is α, the span of α is 5 ~ 10 °, multiple overfire air port group 6 is provided with Secondary Air angle adjusting mechanism, described Secondary Air angle adjusting mechanism comprises stepper motor 35, shaft coupling 32, gearbox 33, multistage spur gear wheel 34, overfire air port 11 is fixed in secondary air box by bearing 31, overfire air port group 6 is connected with multistage spur gear wheel 34, multistage spur gear wheel 34 is arranged in gearbox 33, described gearbox 33 is connected with stepper motor 35 by shaft coupling 32, gap is provided with between described overfire air port 11 and chimney arch water-cooling wall, described gap is provided with flexible sealing 8, the angle adjustable scope of described multiple overfire air port group 6 is-5 ~ 20 °, described multiple fire air nozzle 16 is provided with incident angle governor motion, the span of the angle between angle adjustable and horizontal plane is 20 ~ 45 °, described upper strata tertiary air spout 9 and lower floor's tertiary air spout 10 are equipped with incident angle governor motion, the span of the angle between angle adjustable and horizontal plane is 0 ~ 45 °, described incident angle governor motion comprises at least two panels guide vane 24, homogenizing plate 25, every sheet guide vane 24 is provided with turning cylinder 21, described guide vane 24 is installed between homogenizing plate 25 and tertiary air spout or fire air nozzle by turning cylinder 21, a wherein axle of described turning cylinder 21 is provided with transmission arm 28, other axle is all provided with regulating arm 27, described regulating arm 27 is interconnected by link plate 26, described transmission arm 28 is provided with pull bar 29, described tertiary air spout or fire air nozzle are made up of post-tensioning or layback water screen tube 22 and vertical water-wall tube 23.
A kind of described in this enforcement 3 improves the ejection grading combustion W flame boiler of coal powder ignition burning in actual moving process, breeze airflow sprays in stove with fixing angle, on arch, Secondary Air regulates incident angle by Secondary Air incident angle governor motion, before burner hearth, on rear water wall, two-layer tertiary air wind direction is adjustable, be in operation, when coal and operating condition change, by regulating the incident angle of Secondary Air and tertiary air, at Secondary Air injection, under tertiary air assists injection and push effect, change the position that breeze airflow sprays into burner hearth, then position, primary zone is regulated.Particularly, when the slagging scorification of discovery front-back wall is serious, there is heat fatigue in the excessive lower hearth water-cooling wall overtemperature that causes of flame undershoot, when high the and main reheat steam temperature of large slag phosphorus content is lower than design load problem, the angle making Secondary Air enter directive burner hearth center 2-1 by Secondary Air incident angle governor motion on chimney arch strengthens, by Secondary Air ejector action, First air is strengthened to burner hearth center 2-1 angle excursion, be aided with tertiary air incidence to diminish with horizontal plane angle simultaneously, increase tertiary air to penetrate wind powder up and down to the push effect of burner hearth center 2-1 to arch and reduce its downward secondary injection effect, by above two kinds of means, coal dust is burnt away from front-back wall, improve front-back wall slagging scorification, make coal dust primary zone away from the water-cooling wall of furnace hopper 5 and position, primary zone is improved simultaneously, furnace hopper slope water-cooling wall overtemperature can be prevented, improve main reheated steam simultaneously and reach design load.In addition, when in discovery stove, unburned carbon in flue dust is high, when high fume temperature and main reheated steam overtemperatute, the angle making Secondary Air enter directive burner hearth center 2-1 by encircleing upper Secondary Air incident angle governor motion reduces, by Secondary Air ejector action, First air is reduced to burner hearth center 2-1 angle excursion, be aided with tertiary air incidence to increase with horizontal plane angle simultaneously, reduce tertiary air to penetrate wind powder up and down to the push effect of burner hearth center 2-1 to arch and increase its downward secondary injection effect, by above two kinds of means, flame kernel is moved down, position, coal dust primary zone reduces, increase coal dust total kilometres and time of staying in stove, reduce main reheated steam overtemperature, effectively reduction exhaust gas temperature and ash fly phosphorus content simultaneously.
In addition, it should be noted that, the specific embodiment described in this description, the shape, institute's title of being named etc. of its parts and components can be different.All equivalences of doing according to structure, feature and the principle described in the utility model inventional idea or simple change, be included in the protection domain of the utility model patent.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment; only otherwise depart from structure of the present utility model or surmount this scope as defined in the claims, protection domain of the present utility model all should be belonged to.
Claims (10)
1. one kind is improved the ejection grading combustion W flame boiler of coal powder ignition burning, comprise upper furnace (1), lower hearth (2), the burner hearth that front chimney arch (3) and rear chimney arch (4) are formed, on described front chimney arch (3) from burner hearth center (2-1) to burner hearth front water wall (2-2) and in the rear chimney arch (4) arranges multiple overfire air port from burner hearth center (2-1) to burner hearth rear water wall (2-3), multiple breeze airflow spout, described multiple overfire air port is all connected with lower hearth (2) with multiple breeze airflow spout, it is characterized in that, described multiple overfire air port is made up of multiple overfire air port group (6), each overfire air port group (6) is made up of near the overfire air port (11) arranged two front and back, described multiple breeze airflow spout comprises multiple breeze airflow spout group (7), each breeze airflow spout group (7) is formed by thick coal culm air-flow spout group (14) with thick coal culm air-flow spout group (14) front and back near thin powdered coal air-flow spout group (15) arranged, described thick coal culm air-flow spout group (14) is made up of the thick coal culm air-flow spout (12) that about two abut against together, described thin powdered coal air-flow spout group (15) is made up of the thin powdered coal air-flow spout (13) that about two abut against together, described multiple overfire air port group (6) and multiple breeze airflow spout group (7) are the equidistant interlaced arrangement side by side of in-line along stove cross direction.
2. a kind of ejection grading combustion W flame boiler improving coal powder ignition burning according to claim 1, it is characterized in that, the distance of the coboundary of described thick coal culm air-flow spout group (14) and the coboundary of overfire air port group (6) is b
3, b
3be more than or equal to zero, the distance of the lower boundary of described thin powdered coal air-flow spout group (15) and the lower boundary of overfire air port group (6) is b
4, b
4be greater than zero.
3. a kind of ejection grading combustion W flame boiler improving coal powder ignition burning according to claim 2, it is characterized in that, described overfire air port group (6) coboundary is b from the distance of the boundary line (2-4) of chimney arch and upper furnace
1, b
1be greater than zero, described overfire air port group (6) lower boundary is from the distance b between the forward and backward wall water-cooling wall of burner hearth and the boundary line (2-8) of chimney arch
2, b
2be greater than zero.
4. a kind of ejection grading combustion W flame boiler improving coal powder ignition burning according to claim 1 or 3, it is characterized in that, described multiple breeze airflow spout group (7) is to the centroclinal certain angle fixed installation of stove, the angle of setting angle and center line is the span of α, α is 5 ~ 10 °; Described multiple overfire air port group (6) is provided with Secondary Air angle adjusting mechanism, the angle adjustable scope of described multiple overfire air port group (6) is-5 ~ 20 °, be provided with gap between described overfire air port (11) and chimney arch water-cooling wall, described gap is provided with flexible sealing (8).
5. a kind of ejection grading combustion W flame boiler improving coal powder ignition burning according to claim 4, it is characterized in that, described Secondary Air angle adjusting mechanism comprises stepper motor (35), shaft coupling (32), gearbox (33), multistage spur gear wheel (34), described overfire air port (11) is fixed in secondary air box by bearing (31), described overfire air port group (6) is connected with multistage spur gear wheel (34), multistage spur gear wheel (34) is arranged in gearbox (33), described gearbox (33) is connected with stepper motor (35) by shaft coupling (32).
6. according to claim 1 or 5 a kind of improve coal powder ignition burning ejection grading combustion W flame boiler, it is characterized in that, front water wall (2-6) and the rear water wall (2-7) of upper furnace (1) are provided with multiple fire air nozzle (16), described fire air nozzle (16) is that in-line is equidistantly arranged side by side along stove cross direction, and the lower boundary of described fire air nozzle (16) is b from upper furnace (1) and the distance of chimney arch boundary line (2-4)
5, b
5be greater than zero.
7. a kind of ejection grading combustion W flame boiler improving coal powder ignition burning according to claim 6, it is characterized in that, the front water wall (2-2) of burner hearth and rear water wall (2-3) are symmetrical arranged upper strata tertiary air spout (9) and lower floor's tertiary air spout (10), described upper strata tertiary air spout (9), lower floor's tertiary air spout (10) are that in-line is equidistantly arranged side by side along stove cross direction, and the distance between the lower boundary of described upper strata tertiary air spout (9) and the coboundary of lower floor's tertiary air spout (10) is b
7, b
7be greater than zero, the coboundary of described upper strata tertiary air spout (9) is b from the distance between the forward and backward wall water-cooling wall of burner hearth and the boundary line (2-8) of chimney arch
6, b
6be greater than zero, the lower boundary of described lower floor's tertiary air spout (10) is b from the distance of the boundary line (2-5) of the furnace hopper (5) of the forward and backward wall water-cooling wall of burner hearth and lower hearth (2)
8, b
8be greater than zero.
8. a kind of ejection grading combustion W flame boiler improving coal powder ignition burning according to claim 6, it is characterized in that, described multiple fire air nozzle (16) is provided with incident angle governor motion, and the span of the angle between angle adjustable and horizontal plane is 20 ~ 45 °.
9. a kind of ejection grading combustion W flame boiler improving coal powder ignition burning according to claim 7, it is characterized in that, described upper strata tertiary air spout (9) and lower floor's tertiary air spout (10) are equipped with incident angle governor motion, and the span of the angle between angle adjustable and horizontal plane is 0 ~ 45 °.
10. according to claim 8 or claim 9 a kind of improves the ejection grading combustion W flame boiler of coal powder ignition burning, it is characterized in that, described incident angle governor motion comprises at least two panels guide vane (24), homogenizing plate (25), every sheet guide vane (24) is provided with turning cylinder (21), described guide vane (24) is installed between homogenizing plate (25) and tertiary air spout or fire air nozzle by turning cylinder (21), a wherein axle of described turning cylinder (21) is provided with transmission arm (28), other axle is all provided with regulating arm (27), described regulating arm (27) is interconnected by link plate (26), described transmission arm (28) is provided with pull bar (29).
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104595892A (en) * | 2014-12-30 | 2015-05-06 | 华电电力科学研究院 | Ejecting staged combustion W flame boiler for improving ignition and combustion of pulverized coal |
| CN106196018A (en) * | 2016-07-13 | 2016-12-07 | 贵州电网有限责任公司电力科学研究院 | A kind of W flame direct current cooker is become a cadre the method for commissioning of state burner |
| CN107781804A (en) * | 2017-09-28 | 2018-03-09 | 宁波大学 | A kind of symmetrical combustion W type flame boilers of side wall arrangement arch burner |
| CN114777111A (en) * | 2022-05-17 | 2022-07-22 | 哈尔滨工业大学 | British bar type W flame boiler device and method for gasification coupled combustion |
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2014
- 2014-12-30 CN CN201420866584.6U patent/CN204420990U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104595892A (en) * | 2014-12-30 | 2015-05-06 | 华电电力科学研究院 | Ejecting staged combustion W flame boiler for improving ignition and combustion of pulverized coal |
| CN104595892B (en) * | 2014-12-30 | 2017-11-03 | 华电电力科学研究院 | Improve the ejection grading combustion W flame boiler of coal powder ignition burning |
| CN106196018A (en) * | 2016-07-13 | 2016-12-07 | 贵州电网有限责任公司电力科学研究院 | A kind of W flame direct current cooker is become a cadre the method for commissioning of state burner |
| CN106196018B (en) * | 2016-07-13 | 2018-05-11 | 贵州电网有限责任公司电力科学研究院 | A kind of W flame direct current cooker is become a cadre the method for commissioning of state burner |
| CN107781804A (en) * | 2017-09-28 | 2018-03-09 | 宁波大学 | A kind of symmetrical combustion W type flame boilers of side wall arrangement arch burner |
| CN107781804B (en) * | 2017-09-28 | 2019-08-02 | 宁波大学 | A kind of symmetrical combustion W type flame boiler of side wall arrangement arch burner |
| CN114777111A (en) * | 2022-05-17 | 2022-07-22 | 哈尔滨工业大学 | British bar type W flame boiler device and method for gasification coupled combustion |
| 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 |
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