CN105299638A - Low-NOx combustor arrangement mode and structure for intermediate storage bunker coal pulverizing system - Google Patents
Low-NOx combustor arrangement mode and structure for intermediate storage bunker coal pulverizing system Download PDFInfo
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Abstract
The invention provides a low-NOx combustor arrangement mode and structure applied to an intermediate storage bunker coal pulverizing system. A combustor is composed of tank shells, tertiary air distributing pipes, tertiary air chambers and swing mechanisms thereof, turn-off doors and the like. Tertiary air is distributed to multiple gusts and fed on a secondary air layer, the air amount of each layer and injection angle are controlled and adjusted through a special combustor structure, mixing of air flows in a combustion chamber is adjusted, and deep classification of the air flows of all layers are formed in the longitudinal direction and horizontal direction of a combustor area. The corresponding turn-off door is arranged at a tertiary air inlet of each layer, and operation layers can be selected according to coal types and load changes during operation. According to the low-NOx combustor arrangement mode and structure applied to the intermediate storage bunker coal pulverizing system, a traditional mode of feeding the tertiary air into the combustion chamber is changed, and unfavorable influences on the stability of boiler combustion, control over NOx generation and boiler economical effect due to one-time feeding of a large quantity of tertiary air flow into the combustion chamber are avoided.
Description
Technical field
The present invention relates to warehouse pulverized coal preparation system low-NOx combustor arrangement and structure in one, belong to field of combustion equipment.
Background technology
The thermal power plant of China, pulverized-coal fired boiler extensively adopts middle warehouse formula pulverized coal carried by hot air combustion system, in pulverized coal preparation system, pulverized-coal collector top extracts the weary gas carrying particulate coal dust, directly sends into burner hearth tertiary air nozzle and participates in burning, be called tertiary air by mill exhauster.In traditional burner design, tertiary air is usually placed in the superiors of burner, once all sends at main burner area top, arranges primary and secondary air under it.But tertiary air is all sent at main burner area top, obvious adverse effect can be caused:
1. tertiary air temperature is low, furnace flame temperature is reduced, combustion instability;
2. tertiary air is close to furnace outlet, and temperature is low, and burning time is short, easily causes fly ash combustible material to increase;
3. flame is spun out, and furnace outlet gas temperature raises, and easily makes superheater and reheater overtemperature;
4. a large amount of tertiary airs sends into primary combustion zone, coal dust is mixed at primary combustion zone with a large amount of air, fractional combustion weak effect, is unfavorable for the generation of control NOx.
Therefore, need a kind of new mode tertiary air to send into mode and tertiary air is sent into burner hearth.
Summary of the invention
The object of the invention is to provide warehouse pulverized coal preparation system low-NOx combustor arrangement and structure in one, tertiary air is divided into several strands by distribution duct, optionally in primary combustion zone, send into burner hearth, avoid tertiary air air-flow once to enter burner hearth in a large number and the stability of boiler combustion and boiler economics are had a negative impact.
In order to achieve the above object, warehouse pulverized coal preparation system low-NOx combustor arrangement and structure in the one that technical scheme of the present invention provides, tertiary air is distributed into some stocks to pass at primary combustion zone, then controls to adjust each layer air quantity by special burner structure and inject angle.It is characterized in that: burner is made up of case shell, tertiary air distributing pipe, tertiary chamber and swing mechanism thereof and shutoff door.Tertiary chamber and swing mechanism thereof are primarily of tertiary-air pipe, spout crocodile sheet, bearing pin, turning cylinder, rocking arm, pull bar and swing indicating device composition.Tertiary-air pipe one end is connected with tertiary air distributing pipe, and the other end can be placed on and leave in the overfire air port of port, also can directly be supported on case shell.Tertiary-air pipe spout side is designed with spout crocodile sheet, and crocodile sheet side is rotated and is fixed in tertiary-air pipe, and opposite side is fixed on turning cylinder, is rotated be fixed on tertiary-air pipe by turning cylinder, pulls pull bar rocking arm thus drive crocodile sheet to swing by pendulous device.Every layer of tertiary air porch is provided with shutoff door, operationally can selects according to the change of coal and load the number of plies that puts into operation.Spout crocodile sheet up and down or left and right can swing-α ° to α °.By swinging crocodile sheet, the adjustment to tertiary air air velocity and airflow direction can be realized, and meet the various operating mode such as load variations and coal pulverizer stoppage in transit.
Spout crocodile sheet can adopt upper and lower arrangement form, and crocodile sheet is placed in horizontal level and does not swing instantly, and when upper crocodile sheet is to lower swing, tertiary air spout flow area becomes reduction trend, and air velocity becomes increase trend, and tertiary air air-flow is injected burner hearth and become downward trend; Do not swing when upper crocodile sheet is placed in horizontal level, when lower crocodile sheet upwards swings, tertiary air spout flow area becomes reduction trend, and air velocity becomes increase trend, and tertiary air air-flow is injected burner hearth and become uptrending; When upper crocodile sheet is to lower swing, lower crocodile sheet upwards swings and up and down crocodile sheet pendulum angle is consistent time, tertiary air spout flow area becomes reduction trend, and air velocity becomes increase trend, and tertiary air flow level injects burner hearth.Hot-air flow (Secondary Air)--thick coal culm air-flow (First air)--thin powdered coal air-flow (tertiary air)/hot blast (Secondary Air) of hot-air flow (Secondary Air)/adjustable direction speed--thick coal culm air-flow (First air) form is formed at burner region.Controlling tertiary air by tertiary air entrance shutoff door and inject height, by swinging crocodile sheet, the adjustment to tertiary air air velocity and airflow direction can be realized, regulate the mixing of air-flow in burner hearth.
Spout crocodile sheet can also adopt left and right arrangement form, does not swing when left crocodile sheet is placed in vertical position, and when right crocodile sheet swings left, tertiary air spout flow area becomes reduction trend, and air velocity becomes increase trend, and tertiary air air-flow is injected burner hearth and become left trend; Do not swing when right crocodile sheet is placed in vertical position, when left crocodile sheet swings to the right, tertiary air spout flow area becomes reduction trend, and air velocity becomes increase trend, and tertiary air air-flow is injected burner hearth and become to the right trend; When left crocodile sheet swings to the right, right crocodile sheet swings left and left and right crocodile sheet pendulum angle is consistent time, tertiary air spout flow area becomes reduction trend, and air velocity becomes increase trend, and it is consistent with primary air direction that tertiary air air-flow injects burner hearth direction.Thin powdered coal air-flow (tertiary air) combination of hot-air flow (Secondary Air)/adjustable direction speed is formed, i.e. bellows chamber powder form at burner region.By swinging crocodile sheet, the adjustment to tertiary air air velocity and airflow direction can be realized, regulating the mixing of air-flow in burner hearth.
Warehouse pulverized coal preparation system low-NOx combustor arrangement and structure in one provided by the invention, change the disposable a large amount of feeding burner hearth mode of traditional tertiary air, tertiary air is sent into burner hearth in short transverse or horizontal direction classification, the mode that this tertiary air classification is sent into avoid tertiary air main burner area top all send into cause due to tertiary air temperature low, furnace flame temperature is reduced, combustion instability; Tertiary air is close to furnace outlet, and temperature is low, and burning time is short, easily causes fly ash combustible material to increase; Flame is spun out, and furnace outlet gas temperature raises, and easily makes superheater and reheater overtemperature.A large amount of tertiary airs sends into primary combustion zone, coal dust is mixed at primary combustion zone with a large amount of air, fractional combustion weak effect, is unfavorable for the generation of control NOx.
Warehouse pulverized coal preparation system low-NOx combustor arrangement and structure in one provided by the invention, avoid when not affecting and catching fire tertiary air air-flow once to enter the stability of burner hearth to boiler combustion in a large number, and meet the generation that controls less NOx under the various operating modes such as load variations and coal pulverizer stoppage in transit and obtain higher efficiency of combustion.
Accompanying drawing explanation
Fig. 1 is warehouse pulverized coal preparation system low-NOx combustor arrangement in embodiment 1 one kinds.
Fig. 2 is embodiment 1 burner structure side view.
Fig. 3 is embodiment 1 burner structure top view.
Fig. 4 is embodiment 1 burner structure spout view.
Fig. 5 is warehouse pulverized coal preparation system low-NOx combustor arrangement in embodiment 2 one kinds.
Fig. 6 is embodiment 2 burner structure top view.
Fig. 7 is embodiment 2 burner structure spout view.
Fig. 8 is warehouse pulverized coal preparation system low-NOx combustor arrangement in embodiment 3 one kinds.
Fig. 9 is embodiment 3 burner structure top view.
Figure 10 is embodiment 3 burner structure spout view.
description of reference numerals
1,1a, 1b----case shell, 2,2a, 2b----tertiary air distributing pipe, 3,3a, 3b----tertiary chamber and swing mechanism thereof, 3-1,3-1a, 3-1b----tertiary-air pipe, 3-2,3-3,3-2a, 3-2b, 3-3b----spout crocodile sheet, 3-4,3-4a, 3-4b----bearing pin, 3-5,3-5a, 3-5b----turning cylinder, 3-6,3-6a, 3-6b----rocking arm, 3-7,3-7a, 3-7b----pull bar, 3-8,3-8a, 3-8b----swing indicating device, and 4,4a----overfire air jet, 5,5a, 5b----shutoff door.
Detailed description of the invention
In order to make the present invention become apparent, hereby with three preferred embodiments, and accompanying drawing is coordinated to be described in detail below.
embodiment 1: warehouse pulverized coal preparation system low-NOx combustor arrangement and structure in one.
Fig. 1 is warehouse pulverized coal preparation system low-NOx combustor arrangement in embodiment 1 one kinds, Fig. 2 is embodiment 1 burner structure side view, Fig. 3 is embodiment 1 burner structure top view, Fig. 4 is embodiment 1 burner structure spout view, warehouse pulverized coal preparation system low-NOx combustor arrangement and structure in the one that technical scheme of the present invention provides, it is characterized in that: tertiary air is distributed into some stocks and passes at primary combustion zone, then control to adjust each layer air quantity by special burner structure and inject angle.Burner is made up of case shell (1), tertiary air distributing pipe (2), tertiary chamber and swing mechanism (3) thereof, overfire air jet (4) and shutoff door (5).Tertiary chamber and swing mechanism (3) thereof are primarily of tertiary-air pipe (3-1), spout crocodile sheet (3-2,3-3), bearing pin (3-4), turning cylinder (3-5), rocking arm (3-6), pull bar (3-7) and swing indicating device (3-8) composition.Overfire air jet leaves port in (4), tertiary-air pipe (3-1) nose circle is connected with tertiary air distributing pipe (2), square opening end is placed in overfire air jet (4), upper and lower two pieces of spout crocodile sheet (3-2 are designed with in square opening end tertiary-air pipe (3-1), 3-3), crocodile sheet spout (3-2, 3-3) side is rotated by bearing pin (3-4) and is fixed in tertiary-air pipe (3-1), opposite side is fixed on turning cylinder (3-5), rotated by turning cylinder (3-5) and be fixed on tertiary-air pipe (3-1), pull pull bar (3-7) rocking arm (3-6) by pendulous device (3-8) thus drive spout crocodile sheet (3-2, 3-3) swing up and down.Every layer of tertiary air porch is provided with shutoff door (5), operationally can selects according to the change of coal and load the number of plies that puts into operation.
Spout crocodile sheet adopts upper and lower arrangement form, and upper and lower spout crocodile sheet (3-2,3-3) can swing up and down-α ° to α °.By swinging upper and lower spout crocodile sheet (3-2,3-3), the adjustment to tertiary air air velocity and airflow direction can be realized, instantly spout crocodile sheet (3-3) is placed in horizontal level and does not swing, when upper spout crocodile sheet (3-2) is to lower swing, tertiary air spout flow area becomes reduction trend, air velocity becomes increase trend, and tertiary air air-flow is injected burner hearth and become downward trend; Do not swing when upper spout crocodile sheet (3-2) is placed in horizontal level, when lower spout crocodile sheet (3-3) upwards swings, tertiary air spout flow area becomes reduction trend, and air velocity becomes increase trend, and tertiary air air-flow is injected burner hearth and become uptrending; When upper spout crocodile sheet (3-2) is to lower swing, lower spout crocodile sheet (3-3) upwards swings and up and down spout crocodile sheet (3-2,3-3) pendulum angle is consistent time, tertiary air spout flow area becomes reduction trend, and air velocity becomes increase trend, and tertiary air flow level injects burner hearth.Hot-air flow (Secondary Air)--thick coal culm air-flow (First air)--thin powdered coal air-flow (tertiary air)/hot blast (Secondary Air) of hot-air flow (Secondary Air)/adjustable direction speed--thick coal culm air-flow (First air) form is formed at burner region.Controlling tertiary air by tertiary air entrance shutoff door and inject height, by swinging crocodile sheet (3-2,3-3), the adjustment to tertiary air air velocity and airflow direction can be realized, regulate the mixing of air-flow in burner hearth.
Warehouse pulverized coal preparation system low-NOx combustor arrangement and structure in the one that the present embodiment provides, change the disposable a large amount of feeding burner hearth mode of traditional tertiary air.The mode that this tertiary air classification is sent into avoid tertiary air main burner area top all send into cause due to tertiary air temperature low, furnace flame temperature is reduced, combustion instability; Tertiary air is close to furnace outlet, and temperature is low, and burning time is short, easily causes fly ash combustible material to increase; Flame is spun out, and furnace outlet gas temperature raises, and easily makes superheater and reheater overtemperature.A large amount of tertiary airs sends into primary combustion zone, coal dust is mixed at primary combustion zone with a large amount of air, fractional combustion weak effect, is unfavorable for the generation of control NOx.
embodiment 2: one is applied to middle warehouse pulverized coal preparation system low-NOx combustor arrangement and structure.
Fig. 5 is warehouse pulverized coal preparation system low-NOx combustor arrangement in embodiment 2 one kinds, Fig. 6 is embodiment 2 burner structure top view, Fig. 7 is embodiment 2 burner structure spout view, the one that technical scheme of the present invention provides is applied to middle warehouse pulverized coal preparation system low-NOx combustor arrangement and structure, it is characterized in that: tertiary air is distributed into some stocks and passes at primary combustion zone layer, then control to adjust each layer air quantity by special burner structure and inject angle.Burner is made up of case shell (1a), tertiary air distributing pipe (2a), tertiary chamber and swing mechanism (3a) thereof, overfire air jet (4a) and shutoff door (5a).Tertiary chamber and swing mechanism (3a) thereof are primarily of tertiary-air pipe (3-1a), spout crocodile sheet (3-2a), bearing pin (3-4a), turning cylinder (3-5a), rocking arm (3-6a), pull bar (3-7a) and swing indicating device (3-8a) composition.Port is left in overfire air jet (4a), tertiary-air pipe (3-1a) nose circle is connected with tertiary air distributing pipe (2a), square opening end is placed in overfire air jet (4a), upper and lower two pieces of spout crocodile sheets (3-2a) are designed with in square opening end tertiary-air pipe (3-1a), crocodile sheet spout (3-2a) side is rotated by bearing pin (3-4a) and is fixed in tertiary-air pipe (3-1a), opposite side is fixed on turning cylinder (3-5a), rotated by turning cylinder (3-5a) and be fixed on tertiary-air pipe (3-1a), pull pull bar (3-7a) rocking arm (3-6a) by pendulous device (3-8a) thus drive spout crocodile sheet (3-2a) to swing up and down.Every layer of tertiary air porch is provided with shutoff door (5a), operationally can selects according to the change of coal and load the number of plies that puts into operation.
Spout crocodile sheet adopts left and right arrangement form, and the present embodiment adopts single crocodile sheet, and when crocodile sheet (3-2a) swings, tertiary air spout flow area becomes reduction trend, and air velocity becomes increase trend, and tertiary air air-flow is injected burner hearth direction and changed; Thin powdered coal air-flow (tertiary air) combination of hot-air flow (Secondary Air)/adjustable direction speed is formed, i.e. bellows chamber powder form at burner region.By swinging crocodile sheet (3-2a), the adjustment to tertiary air air velocity and airflow direction can be realized, regulating the mixing of air-flow in burner hearth.
Warehouse pulverized coal preparation system low-NOx combustor arrangement and structure in the one that the present embodiment provides, change the disposable a large amount of feeding burner hearth mode of traditional tertiary air, tertiary air is sent into burner hearth in short transverse or horizontal direction classification, the mode that this tertiary air classification is sent into avoid tertiary air main burner area top all send into cause due to tertiary air temperature low, furnace flame temperature is reduced, combustion instability; Tertiary air is close to furnace outlet, and temperature is low, and burning time is short, easily causes fly ash combustible material to increase; Flame is spun out, and furnace outlet gas temperature raises, and easily makes superheater and reheater overtemperature.A large amount of tertiary airs sends into primary combustion zone, coal dust is mixed at primary combustion zone with a large amount of air, fractional combustion weak effect, is unfavorable for the generation of control NOx.
embodiment 3: warehouse pulverized coal preparation system low-NOx combustor arrangement and structure in one.
Fig. 8 is that embodiment 3 one kinds is applied to middle warehouse pulverized coal preparation system low-NOx combustor arrangement, Fig. 9 is embodiment 3 burner structure side view, Figure 10 is embodiment 1 burner structure spout view, the one that technical scheme of the present invention provides is applied to middle warehouse pulverized coal preparation system low-NOx combustor arrangement and structure, it is characterized in that: tertiary air is distributed into some stocks and passes at primary combustion zone, then control to adjust each layer air quantity by special burner structure and inject angle.Burner is made up of case shell (1b), tertiary air distributing pipe (2b), tertiary chamber and swing mechanism (3b) thereof and shutoff door (5b).Tertiary chamber and swing mechanism (3b) thereof are primarily of tertiary-air pipe (3-1b), spout crocodile sheet (3-2b, 3-3b), bearing pin (3-4b), turning cylinder (3-5b), rocking arm (3-6b), pull bar (3-7b) and swing indicating device (3-8b) composition.Tertiary-air pipe (3-1b) nose circle is connected with tertiary air distributing pipe (2b), square opening end is directly supported on case shell by tertiary-air pipe, upper and lower two pieces of spout crocodile sheet (3-2b are designed with in square opening end tertiary-air pipe (3-1b), 3-3b), crocodile sheet spout (3-2b, 3-3b) side is rotated by bearing pin (3-4b) and is fixed in tertiary-air pipe (3-1b), opposite side is fixed on turning cylinder (3-5b), rotated by turning cylinder (3-5b) and be fixed on tertiary-air pipe (3-1b), pull pull bar (3-7b) rocking arm (3-6b) by pendulous device (3-8b) thus drive spout crocodile sheet (3-2b, 3-3b) swing up and down.Every layer of tertiary air porch is provided with shutoff door (5b), operationally can selects according to the change of coal and load the number of plies that puts into operation.
Spout crocodile sheet adopts upper and lower arrangement form, and upper and lower spout crocodile sheet (3-2b, 3-3b) can swing up and down-α ° to α °.By swinging upper and lower spout crocodile sheet (3-2b, 3-3b), the adjustment to tertiary air air velocity and airflow direction can be realized, instantly spout crocodile sheet (3-3b) is placed in horizontal level and does not swing, when upper spout crocodile sheet (3-2b) is to lower swing, tertiary air spout flow area becomes reduction trend, air velocity becomes increase trend, and tertiary air air-flow is injected burner hearth and become downward trend; Do not swing when upper spout crocodile sheet (3-2b) is placed in horizontal level, when lower spout crocodile sheet (3-3b) upwards swings, tertiary air spout flow area becomes reduction trend, and air velocity becomes increase trend, and tertiary air air-flow is injected burner hearth and become uptrending; When upper spout crocodile sheet (3-2b) is to lower swing, lower spout crocodile sheet (3-3b) upwards swings and up and down spout crocodile sheet (3-2b, 3-3b) pendulum angle is consistent time, tertiary air spout flow area becomes reduction trend, and air velocity becomes increase trend, and tertiary air flow level injects burner hearth.Hot-air flow (Secondary Air)--thick coal culm air-flow (First air)--hot-air flow (Secondary Air)--the thin powdered coal air-flow (tertiary air) of adjustable direction speed--hot blast (Secondary Air)--thick coal culm air-flow (First air) form is formed at burner region.Controlling tertiary air by tertiary air entrance shutoff door and inject height, by swinging crocodile sheet (3-2b, 3-3b), the adjustment to tertiary air air velocity and airflow direction can be realized, regulate the mixing of air-flow in burner hearth.
Warehouse pulverized coal preparation system low-NOx combustor arrangement and structure in the one that the present embodiment provides, change the disposable a large amount of feeding burner hearth mode of traditional tertiary air.The mode that this tertiary air classification is sent into avoid tertiary air main burner area top all send into cause due to tertiary air temperature low, furnace flame temperature is reduced, combustion instability; Tertiary air is close to furnace outlet, and temperature is low, and burning time is short, easily causes fly ash combustible material to increase; Flame is spun out, and furnace outlet gas temperature raises, and easily makes superheater and reheater overtemperature.A large amount of tertiary airs sends into primary combustion zone, coal dust is mixed at primary combustion zone with a large amount of air, fractional combustion weak effect, is unfavorable for the generation of control NOx.
Claims (11)
1. warehouse pulverized coal preparation system low-NOx combustor arrangement and a structure in, is characterized in that: tertiary air is distributed into some stocks and passes at secondary stratification of wind, then control to adjust each layer air quantity by special burner structure and inject angle, burner is made up of case shell (1,1a, 1b), tertiary air distributing pipe (2,2a, 2b), tertiary chamber and swing mechanism thereof (3,3a, 3b) and shutoff door (5,5a, 5b), tertiary chamber and swing mechanism thereof are primarily of tertiary-air pipe (3-1,3-1a, 3-1b), spout crocodile sheet (3-2,3-3,3-2a, 3-2b, 3-3b), bearing pin (3-4,3-4a, 3-4b), turning cylinder (3-5,3-5a, 3-5b), rocking arm (3-6,3-6a, 3-6b), pull bar (3-7,3-7a, 3-7b) and swing indicating device (3-8,3-8a, 3-8b) composition, tertiary-air pipe (3-1,3-1a, 3-1b) one end and tertiary air distributing pipe (2,2a, 2b) are connected, and one end can be placed in overfire air jet (4,4a), also can directly be supported on case shell (1,1a, 1b), tertiary-air pipe (3-1, 3-1a, 3-1b) there is spout crocodile sheet (3-2, 3-3, 3-2a, 3-2b, 3-3b), spout crocodile sheet (3-2, 3-3, 3-2a, 3-2b, 3-3b) side is rotated and is fixed on tertiary-air pipe (3-1, 3-1a, 3-1b), opposite side is fixed on turning cylinder (3-5, 3-5a, 3-5b), by turning cylinder (3-5, 3-5a, 3-5b) tertiary-air pipe (3-1 is fixed in rotation, 3-1a, 3-1b), by pendulous device (3-8, 3-8a, 3-8b) pull pull bar (3-7, 3-7a, 3-7b) rocking arm (3-6, 3-6a, 3-6b) thus drive spout crocodile sheet (3-2, 3-3, 3-2a, 3-2b, 3-3b) swing, shutoff door (5,5a, 5b) is provided with between tertiary-air pipe (3-1,3-1a, 3-1b) and tertiary air distributing pipe (2,2a, 2b).
2. warehouse pulverized coal preparation system low-NOx combustor arrangement and structure in one as claimed in claim 1, is characterized in that: it is at least one deck that described tertiary air passes into the number of plies at primary combustion zone.
3. warehouse pulverized coal preparation system low-NOx combustor arrangement and structure in one as claimed in claim 1, is characterized in that: described tertiary-air pipe (3-1,3-1a, 3-1b) be directly supported on case shell (1,1a, 1b) upper time be arranged in any side or both sides or any three sides arbitrarily of overfire air jet (4,4a).
4. warehouse pulverized coal preparation system low-NOx combustor arrangement and structure in one as claimed in claim 1, is characterized in that: described tertiary-air pipe (3-1,3-1a, 3-1b) be placed on overfire air jet (4,4a) interior time be arranged in optional position in overfire air jet (4,4a).
5. warehouse pulverized coal preparation system low-NOx combustor arrangement and structure in one as claimed in claim 1, is characterized in that: the described secondary stratification of wind that inner or sidepiece is furnished with tertiary-air pipe (3-1,3-1a, 3-1b) at overfire air jet (4,4a) is adjacent secondary stratification of wind.
6. warehouse pulverized coal preparation system low-NOx combustor arrangement and structure in one as claimed in claim 1, is characterized in that: the described secondary stratification of wind that inner or sidepiece is furnished with tertiary-air pipe (3-1,3-1a, 3-1b) at overfire air jet (4,4a) is non-conterminous secondary stratification of wind.
7. warehouse pulverized coal preparation system low-NOx combustor arrangement and structure in one as claimed in claim 1, is characterized in that: described in tertiary-air pipe (3-1,3-1a, 3-1b) spout crocodile sheet (3-2,3-3,3-2a, 3-2b, 3-3b) be single crocodile sheet.
8. warehouse pulverized coal preparation system low-NOx combustor arrangement and structure in one as claimed in claim 1, is characterized in that: described tertiary-air pipe (3-1,3-1a) interior spout crocodile sheet (3-2,3-3,3-2a, 3-2b, 3-3b) is two crocodile sheets.
9. warehouse pulverized coal preparation system low-NOx combustor arrangement and structure in one as claimed in claim 1, it is characterized in that: described spout crocodile sheet (3-2,3-3,3-2a, 3-2b, 3-3b) adopts upper and lower arrangement form, swings up and down in tertiary-air pipe (3-1,3-1a, 3-1b).
10. warehouse pulverized coal preparation system low-NOx combustor arrangement and structure in one as claimed in claim 1, it is characterized in that: described spout crocodile sheet (3-2,3-3,3-2a, 3-2b, 3-3b) adopts left and right arrangement form, swings in tertiary-air pipe (3-1,3-1a, 3-1b).
11. warehouse pulverized coal preparation system low-NOx combustor arrangement and structures in one as claimed in claim 1, is characterized in that: described spout crocodile sheet (3-2,3-3,3-2a, 3-2b, 3-3b) is swung sideward dynamic angle [alpha]=0-30 °.
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| CN105782966A (en) * | 2016-03-15 | 2016-07-20 | 华中科技大学 | Dual-mode pulverized coal burner and boiler burner system |
| CN107795983A (en) * | 2017-11-09 | 2018-03-13 | 无锡华光锅炉股份有限公司 | Tertiary air boiler coal-ash combustion system |
| CN114110569A (en) * | 2021-09-28 | 2022-03-01 | 清华大学 | Combustion system and combustion method of intermediate storage type pulverized coal fired boiler |
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