Swinging arch burner device and W flame boiler

Abstract

The utility model relates to the technical field of W flame boilers, and provides a swingable on-arch burner device and a W flame boiler, the swingable on-arch burner device comprises a pulverized coal burner arranged on an arch of the W flame boiler, and the W flame boiler is provided with an on-arch air bellow; the pulverized coal burner comprises a burner air pipe and a peripheral air pipe. An inlet of the burner air pipe communicates with a pulverized coal pipeline, and an outlet is arranged in a swinging mode and communicates with a W-flame boiler hearth. An outlet of the peripheral air pipe is arranged in a swinging manner and is communicated with a W flame boiler hearth; an outlet of the peripheral air pipe is close to an outlet of the burner air pipe, and the peripheral air pipe and the burner air pipe swing synchronously; according to the utility model, the downward injection direction of pulverized coal airflow is adjusted in a simple, strong-manufacturability and low-cost manner, so that the height of the center of flame in the furnace can be adjusted, and the purpose of adjusting the steam temperature is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of W-flame boilers, in particular to a swingable arch burner device and a W-flame boiler. Background Art

[0002] During the actual operation of the W-type flame boiler, some W-flame boiler devices have large upward and downward airflow momentum and strong rigidity, and the downward shooting depth is too large. The pulverized coal airflow cannot spread quickly after ignition, resulting in the flame center position being biased downward, causing the main steam temperature and the reheated steam temperature to be low, and the unit's power generation efficiency to be low. In order to solve this problem, the existing technology will set a plurality of secondary air nozzles to meet the airflow rotation in the lower furnace, reduce the secondary air speed, change the flame center position, and ensure the temperature inside the furnace; however, this solution requires a plurality of openings to be set in the furnace to meet the technical transformation needs, and at the same time, it is not convenient for adaptive adjustment during later use. Utility Model Content

[0003] The utility model aims to provide a swingable arch burner device and a W-flame boiler to solve the above problems.

[0004] The embodiment of the utility model is realized through the following technical scheme: a swingable arch burner device comprises a pulverized coal burner arranged on the arch of a W-flame boiler, and the W-flame boiler is provided with an arch bellows; the pulverized coal burner comprises: a burner air duct and a peripheral air duct; the inlet of the burner air duct is connected to the pulverized coal pipeline, and the outlet is swingably arranged and connected to the furnace of the W-flame boiler; the inlet of the peripheral air duct is connected to the arch bellows, and the outlet is swingably arranged and connected to the furnace of the W-flame boiler; the outlet of the peripheral air duct is arranged close to the outlet of the burner air duct and the two swing synchronously.

[0005] Furthermore, the outlet of the peripheral air duct is sleeved on the outside of the outlet of the burner air duct.

[0006] Furthermore, the peripheral air duct is sleeved on the outside of the burner air duct.

[0007] Furthermore, a driving mechanism is provided, and the driving mechanism is used to drive the outlet of the peripheral air duct and the outlet of the burner air duct to swing.

[0008] Furthermore, the driving mechanism includes a manual driving mechanism and an electric driving mechanism.

[0009] Furthermore, the manual drive mechanism is a connecting rod mechanism.

[0010] Furthermore, a fixed cover is provided on the W-flame boiler arch; a peripheral wind duct is fixedly arranged on the fixed cover; a burner nozzle is provided at the outlet of the peripheral wind duct, and the burner nozzle is an inner and outer double-layer channel structure and includes an inner channel and an outer channel, the inner channel is connected to the burner wind duct, and the outer channel is connected to the peripheral wind duct; the middle part of the burner nozzle is arranged on the fixed cover or the burner wind duct through a rotating axis; and a manual drive mechanism is used to drive the burner nozzle to swing around the rotating axis.

[0011] Furthermore, the manual drive mechanism includes: a handle and a connecting rod, the head end of the connecting rod is hinged to the end of the burner nozzle, the end of the connecting rod is hinged to the handle, and the middle part of the handle is fixed by a rotating shaft.

[0012] Furthermore, the pulverized coal burner is α with the vertical direction; the swing angle of the outlet of the peripheral wind duct and the outlet of the burner duct is β; 0°<α<20°; 0°<β<20°.

[0013] A W-flame boiler comprises a furnace, an arch wind box, and a plurality of swingable arch burner devices arranged on the arch.

[0014] The utility model has at least the following advantages and beneficial effects:

[0015] 1. By setting a swingable pulverized coal burner to adjust the downward direction of the pulverized coal airflow, the height of the flame center in the furnace can be adjusted to achieve the purpose of adjusting the steam temperature.

[0016] 2. The adjustment method is simple and intuitive, making the entire W-flame boiler more adaptable.

[0017] 3. Temperature adjustment can be achieved without major changes to existing equipment, with fast transformation, low cost and good effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the installation structure of a swingable arch burner device provided in the first embodiment;

[0020] Figure 2 A schematic diagram of the structure of a swingable arch burner device provided in the first embodiment;

[0021] Figure 3A schematic diagram of the side structure of a swingable arch burner device provided in the first embodiment;

[0022] Figure 4 A partially enlarged schematic diagram of a swingable arch burner device provided in the first embodiment;

[0023] Figure 5 A schematic diagram of the cross-sectional structure of a peripheral air duct and a burner air duct in a swingable arch burner device provided in the first embodiment;

[0024] Figure 6 A schematic diagram of a first motion state of a driving mechanism in a swingable arch burner device provided in the first embodiment;

[0025] Figure 7 A schematic diagram of a second motion state of a driving mechanism in a swingable arch burner device provided in the first embodiment;

[0026] Figure 8 A schematic diagram of a first motion state of a swingable arch burner device provided in the first embodiment;

[0027] Fig. 9 A schematic diagram of a second motion state of a swingable arch burner device provided in the first embodiment;

[0028] Fig.10 A schematic diagram of the structure of a swingable arch burner device provided in the second embodiment;

[0029] Icons: 1-W flame boiler, 2-coal powder burner, 3-arch bellows, 4-burner air duct, 5-peripheral air duct, 6-coal powder pipeline, 7-furnace, 8-driving mechanism, 9-fixed cover, 10-burner nozzle, 11-inner channel, 12-outer channel, 13-rotating shaft, 14-handle, 15-connecting rod, 16-rotating shaft, 17-rib plate, 18-lifting mechanism, 19-movable seal. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Embodiment 1

[0033] like Figure 1 As shown, in this embodiment, a swingable arch burner device is disclosed, which is mainly used to adjust the downward direction of the coal powder airflow, thereby adjusting the height of the flame center in the furnace; its structure includes a coal powder burner 2 arranged on the arch of a W-flame boiler 1, and the W-flame boiler 1 is provided with an arch wind box 3.

[0034] Specifically, Figure 2-5 As shown, the pulverized coal burner 2 includes: a burner air duct 4 and a peripheral air duct 5; wherein the burner air duct 4 is used to supply the pulverized coal airflow; specifically, the inlet of the burner air duct 4 is connected to the pulverized coal pipeline 6, and the outlet is swing-set and connected to the furnace 7 of the W-flame boiler 1. The inlet of the peripheral air duct 5 is connected to the arch wind box 3, and the outlet is swing-set and connected to the furnace 7 of the W-flame boiler 1.

[0035] The outlet of the peripheral wind duct 5 is sleeved on the outside of the outlet of the burner duct 4 and the two swing synchronously. The peripheral wind duct 5 is entirely located in the bellows 3 on the boiler arch, and the peripheral wind is drawn from the hot secondary air of the boiler. When the boiler is running, the peripheral wind can be used as cooling wind to protect the outlet of the burner duct 4; it should be noted here that the outlet of the peripheral wind duct 5 can be fixedly set or movably set with the pipe body of the peripheral wind duct 5, such as using a gooseneck pipe connection; similarly, the outlet of the burner duct 4 can be fixedly connected or movably set with the pipe body of the burner duct 4; of course, in this embodiment, the method of movable connection is: a burner nozzle 10 is separately set at the outlet of the peripheral wind duct 5 to extend the outlet of the peripheral wind duct 5, and the burner nozzle 10 can be swung, so as to realize the swing of the outlet of the peripheral wind duct 5. Further, as Figure 4 As shown, the burner nozzle 10 is an inner and outer double-layer channel structure and includes an inner channel 11 and an outer channel 12, the inner channel 11 is connected to the burner air duct 4, and the outer channel 12 is connected to the peripheral air duct 5; by adopting a burner nozzle 10, the outlets of the peripheral air duct 5 and the burner air duct 4 are extended; by controlling the swing of a burner nozzle 10, the outlet angles of the peripheral air duct 5 and the burner air duct 4 can be synchronously adjusted, thereby realizing the adjustment of the downward direction of the coal powder airflow.

[0036] Specifically, Figure 2As shown, the swing structure of the burner nozzle 10 is as follows: a fixed cover 9 is provided on the arch of the W flame boiler 1, and a peripheral air duct 5 is fixedly arranged on the fixed cover 9. The fixed cover 9 connects the water cooling wall on the arch and the peripheral air duct 5 to support the burner; the peripheral air duct 5 and the burner air duct 4 are fixedly connected by ribs 17; thus, the burner air duct 4 is also fixedly arranged; Figure 4 As shown, the middle part of the burner nozzle 10 is arranged on the burner air duct 4 through the rotating shaft 13; in addition, as Figure 2 ,3, there is also a manual drive mechanism for driving the burner nozzle 10 to swing around the rotation axis 13; Figure 6 ,7, the manual drive mechanism includes: a handle 14 and a connecting rod 15, as shown in Figure 3 As shown, the connecting rod 15 is arranged inside the peripheral wind duct 5, and the head end of the connecting rod 15 is hinged to the end of the burner nozzle 10, and the end of the connecting rod 15 is hinged to the handle 14, and the handle 14 is arranged on the fixed cover 9 away from the fixed cover 9. The middle part of the handle 14 is fixed by the rotating shaft 16. The rotating shaft 16 can be fixed without limitation. For example, a shell is arranged outside the burner wind duct 4, and the rotating shaft 16 is arranged on the shell. The shell and the burner wind duct 4 form a cavity whose bottom surface is connected to the wind box 3 on the boiler arch. The manual drive The moving mechanism is surrounded by the cavity to ensure sealing; the swinging process is as follows: by manually raising or lowering the handle 14, the lever action of the handle 14 drives the connecting rod 15 to rise or fall, thereby pulling the burner nozzle 10 to swing around the rotation axis 13; in this process, it should be emphasized that there will be a certain gap between the burner nozzle 10 and the burner air duct 4 to ensure that the burner air duct 4 and the burner nozzle 10 are connected during the swinging process, and the peripheral air duct 5 is connected to the outer channel 12 of the burner nozzle 10. Further, as Figure 4 As shown, the outer channel 12 of the burner nozzle 10 is sheathed by the peripheral wind duct 5; the burner duct 4 is arranged close to the inner channel of the burner nozzle 10, preferably on the inner side; preferably, the pulverized coal burner 2 is α with the vertical direction; the swing angle between the outlet of the peripheral wind duct 5 and the outlet of the burner duct 4 is 2β; 0°<α<20°; 0°<β<20°; During the operation of the W flame boiler, when the main steam temperature and the reheat steam temperature are low, such as Fig. 9 As shown, the burner nozzle 10 can be adjusted to swing toward the center of the furnace 7 by a certain angle +β, thereby raising the flame center in the furnace and achieving the purpose of raising the main steam temperature and the reheat steam temperature, as shown in FIG. Figure 8 As shown; when the main steam temperature and the reheated steam temperature are too high, the burner nozzle 10 can be adjusted to swing to the outside of the furnace 7 at a certain angle -β, thereby lowering the flame center in the furnace and achieving the purpose of lowering the main steam temperature and the reheated steam temperature.

[0037] Embodiment 2

[0038] like Fig.10 As shown, in this embodiment, a swingable arch burner device is mainly disclosed, which is mainly used to adjust the downward direction of the coal powder airflow, thereby adjusting the height of the flame center in the furnace; its structure includes a coal powder burner 2 arranged on the arch of a W-flame boiler 1, and the W-flame boiler 1 is provided with an arch wind box 3; wherein Fig.10 The medium W flame boiler 1 is a symmetrical structure.

[0039] The pulverized coal burner 2 includes: a burner air duct 4 and a peripheral air duct 5; the inlet of the burner air duct 4 is connected to the pulverized coal pipeline 6, and the outlet is swingingly arranged and connected to the furnace 7 of the W-flame boiler 1; the inlet of the peripheral air duct 5 is connected to the arch wind box 3, and the outlet is swingingly arranged and connected to the furnace 7 of the W-flame boiler 1; the peripheral air duct 5 and the burner air duct 4 are arranged close to each other and swing synchronously; specifically, the peripheral air duct 5 is sleeved on the outside of the burner air duct 4. The two are connected by ribs 17.

[0040] A driving mechanism 8 is also provided, which is used to drive the peripheral wind duct 5 and the burner wind duct 4 to swing, thereby driving the outlet of the peripheral wind duct 5 and the outlet of the burner wind duct 4 to swing; specifically, the driving mechanism 8 is an electronic telescopic rod, which is arranged outside the arch bellows 3; the middle part of the burner wind duct 4 is hinged and fixed inside the peripheral arch bellows 3 as a swing point, and the peripheral wind duct 5 and the burner wind duct 4 located inside the W flame boiler 1 can be swung by extending and retracting the electronic telescopic rod and utilizing the lever principle. Furthermore, a movable sealing sleeve should be provided at the connection, such as a gooseneck tube; of course, due to the pressure difference between the arch bellows 3 and the W flame boiler 1, the requirements for sealing will not be too high. Of course, preferably, a movable sealing member 19, such as high temperature resistant rubber, can be provided at the swing point.

[0041] In addition, a lifting mechanism 18 may be provided at the fixed end of the driving mechanism 8 to increase the depth of the peripheral air duct 5 and the burner air duct 4. It should be noted here that if a lifting mechanism 18 is provided, then no hinge point should be provided on the peripheral air duct 5, and the swing point is realized by abutting against the movable seal 19; the lifting mechanism 18 may adopt an electronic lifting rod.

[0042] The present invention also discloses a W-flame boiler 1, comprising a furnace 7, an arch wind box 3, and a plurality of swingable arch burner devices arranged on the arch as in the first or second embodiment; wherein the swingable arch burner devices are evenly distributed around the circumference.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A swingable arch burner device, comprising a pulverized coal burner (2) arranged on an arch of a W-flame boiler (1), wherein the W-flame boiler (1) is provided with an arch wind box (3); characterized in that: The pulverized coal burner (2) comprises: a burner air duct (4) and a peripheral air duct (5); the inlet of the burner air duct (4) is connected to the pulverized coal pipeline (6), and the outlet is swingably arranged and connected to the furnace (7) of the W-flame boiler (1); the inlet of the peripheral air duct (5) is connected to the arch wind box (3), and the outlet is swingably arranged and connected to the furnace (7) of the W-flame boiler (1); the outlet of the peripheral air duct (5) is arranged close to the outlet of the burner air duct (4), and the two swing synchronously.

2. The swingable burner device according to claim 1, characterized in that: The outlet of the peripheral air duct (5) is sleeved on the outside of the outlet of the burner air duct (4).

3. The swingable burner device according to claim 2, characterized in that: The peripheral air duct (5) is sleeved on the outside of the burner air duct (4).

4. The swingable burner device according to claim 2 or 3, characterized in that: A driving mechanism (8) is also provided, and the driving mechanism (8) is used to drive the outlet of the peripheral air duct (5) and the outlet of the burner air duct (4) to swing.

5. The swingable burner device according to claim 4, characterized in that: The driving mechanism (8) comprises a manual driving mechanism (8) and an electric driving mechanism (8).

6. The swingable overhang burner device according to claim 5, characterized in that: The manual drive mechanism (8) is a connecting rod mechanism.

7. The swingable overhang burner device according to claim 6, characterized in that: The W-flame boiler (1) is also provided with a fixed cover (9) on the arch; the peripheral air duct (5) is fixedly arranged on the fixed cover (9); The outlet of the peripheral air duct (5) is provided with a burner nozzle (10), the burner nozzle (10) is an inner and outer double-layer channel structure and comprises an inner channel (11) and an outer channel (12), the inner channel (11) is connected to the burner air duct (4), and the outer channel (12) is connected to the peripheral air duct (5); The middle part of the burner nozzle (10) is arranged on the fixed cover (9) or the burner air duct (4) through a rotating shaft (13); the manual driving mechanism (8) is used to drive the burner nozzle (10) to swing around the rotating shaft (13).

8. The swingable overhang burner device according to claim 7, characterized in that: The manual drive mechanism (8) comprises a handle (14) and a connecting rod (15), wherein the head end of the connecting rod (15) is hinged to the end of the burner nozzle (10), the tail end of the connecting rod (15) is hinged to the handle (14), and the middle part of the handle (14) is fixedly arranged via a rotating shaft (16).

9. The swingable overhang burner device according to claim 1, characterized in that: The pulverized coal burner (2) is at an angle α to the vertical direction; the swing angles of the outlet of the peripheral air duct (5) and the outlet of the burner air duct (4) are β; 0°<α<20°; 0°<β<20°.

10. A W-flame boiler, characterized in that: The invention comprises a furnace (7), an arch wind box (3), and a plurality of swingable arch burner devices arranged on the arch as described in any one of claims 5 to 9.

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