CN107606636A - A kind of single nozzles multitube of correspondence combines half direct-firing vent pulverized coal handling system - Google Patents
A kind of single nozzles multitube of correspondence combines half direct-firing vent pulverized coal handling system Download PDFInfo
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- CN107606636A CN107606636A CN201610546208.2A CN201610546208A CN107606636A CN 107606636 A CN107606636 A CN 107606636A CN 201610546208 A CN201610546208 A CN 201610546208A CN 107606636 A CN107606636 A CN 107606636A
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- lack
- gas
- pulverized coal
- distributor
- powder
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Abstract
A kind of single nozzles multitube of correspondence combines half direct-firing vent pulverized coal handling system, the invention discloses a kind of half direct-firing vent pulverized coal handling system, belongs to technical field of combustion equipment.The present invention includes pulverized-coal collector, rotation flapper, main pulverized coal distributor, secondary pulverized coal distributor, air and powder mixer, mill exhauster, lack of gas bellows, main lack of gas distributor, secondary lack of gas distributor, lack of gas nozzle, the control valve of each pipeline, the pipeline of each device of connection and multiport burner corresponding with sending pipeline.The allocated device of coal dust is assigned in the multiple pipelines for being delivered to same burner, after the air and powder mixer corresponding with each pipeline mixes with First air, is sent into corresponding burner and is burnt.The present invention in performing low-load running of machine set while powder feeding air-flow optimal pulverized coal concentration is maintained, can ensure the speed of powder feeding pipes internal powder conveying air-flow within the limits prescribed, while reduce the oxygen concentration in main burning area under underload, reduce NOXGeneration.
Description
Technical field
The present invention relates to a kind of boiler of power plant field of combustion equipment, more particularly to a kind of half direct-firing lack of gas of boiler of power plant to send
Powder system.
Background technology
Because the powder feeding pipes sectional area of boiler can not be adjusted, therefore in order to prevent powder feeding air-flow because flow velocity is too low and heavy
Product is, it is necessary to higher weary tolerance maintains the flow velocity of powder feeding air-flow within the limits prescribed, but due to needed for boiler combustion
The reduction of Coal-fired capacity random groups load and reduce which results in the coal powder density of powder feeding air-flow is relatively low, so as to be unfavorable for coal dust
Burning fire, also result in boiler be sent into underload main burning area air capacity it is higher, main burning area oxygen concentration is higher,
Add NOxGeneration.Cause powder feeding air-flow velocity relatively low if according to the weary tolerance pulverized coal conveying for maintaining optimal pulverized coal concentration,
It is unfavorable for the safe operation of pulverized coal preparation system.
The content of the invention
The purpose of patent of the present invention is to provide a kind of vent pulverized coal handling system for being applied to half direct-firing coal-burning boiler, and it send
The flow area of powder pipeline is adjustable, can meet the flow velocity of breeze airflow within the limits prescribed, while also can guarantee that coal dust gas
Coal powder density is optium concentration in stream.
What the purpose of patent of the present invention was realized in：A kind of Multi-tube composite vent pulverized coal handling system, corresponding single burning
Device uses more pipeline combined type powder feeding pipes, and is that the multi-port to match with caliber burns by corresponding burner reconstruction
Device.By the valve of the box-like powder feeding pipes system of control group, different powder feeding pipes is switched to adjust its flow area.
Patent of the present invention allows the flow area of powder feeding pipes to change with load variations, exists maintaining coal powder density
When near optimum value, the wind speed in pipeline also can guarantee that in rational scope, to ensure that deposition and pot do not occur for breeze airflow
The stabilization of stove burning.
Patent of the present invention causes the weary tolerance in powder feeding pipes to be reduced with the reduction of load, so as to reduce boiler main combustion
The oxygen concentration in area is burnt, reduces NOxGeneration.
Brief description of the drawings
Below in conjunction with accompanying drawing, the present invention is further detailed explanation.
Fig. 1 is the structural representation of the present invention.
Each label implication is as follows in Fig. 1：1- hot blasts；2- cold wind；3- pair lack of gas distributors；4- pair pulverized coal distributors；5- master
Pulverized coal distributor；6- pulverized-coal collectors；7-1 lack of gas pipelines；8-2 lack of gas pipelines；9-3 lack of gas pipelines；10-1 coal dusts
Distributor discharge pipe；11-2 pulverized coal distributor discharge nozzles；12-3 pulverized coal distributor discharge nozzles；13-1 powder feeding pipes；14-
No. 2 powder feeding pipes；15-3 powder feeding pipes；16-1 lack of gas pipeline valves；17-2 lack of gas pipeline valves；18-3 blast pipes
Road valve；19-1 air and powder mixers；20-2 air and powder mixers；21-3 wind powder distributors；22-1 pulverized coal distributors go out
Expects pipe valve；23-2 pulverized coal distributors discharging tube valve；24-3 pulverized coal distributors discharging tube valve；25- burners；26-
Lack of gas nozzle；27- rotates flapper；28- run coal bins；29- feeders；30- coal pulverizers；31- mill separators；The main lack of gas of 32-
Distributor；33-0 lack of gas pipelines；34-0 lack of gas pipeline valves；The main lack of gas pipeline valves of 35-；36- mill exhausters；37- lack of gas
Bellows.
Embodiment
As shown in Figure 1, including pulverized-coal collector (6), rotation flapper (27), main pulverized coal distributor (5), secondary coal powder distribation
Device (4), mill exhauster (36), lack of gas bellows (37), main lack of gas distributor (32), secondary lack of gas distributor (3), No. 1 pulverized coal distributor
Discharge nozzle (10), No. 2 pulverized coal distributor discharge nozzles (11), No. 3 coal dust classifier discharge nozzles (12), No. 1 lack of gas pipeline (7), No. 2
Lack of gas pipeline (8), No. 3 lack of gas pipelines (9), No. 0 lack of gas pipeline (33), No. 1 air and powder mixer (19), No. 2 air and powder mixers
(20), No. 3 air and powder mixers (21), No. 1 powder feeding pipes (13), No. 2 powder feeding pipes (14), No. 3 powder feeding pipes (15), lack of gas spray
Mouth (26), the control valve of each pipeline, the pipeline of each device of connection and multiport burner corresponding with powder feeding pipes
(25)。
As shown in Figure 1, coal dust enters the secondary pulverized coal distributor (4) for being sent into some burner after main pulverized coal distributor (5),
Again No. 1 pulverized coal distributor discharge nozzle (10), No. 2 pulverized coal distributor discharge nozzles (11), No. 3 coals are respectively enterd through secondary pulverized coal distributor
Powder separator discharge nozzle (12).
As shown in Figure 1, lack of gas enter the secondary lack of gas distributor for being sent into some burner after main lack of gas distributor (32)
(3), then through secondary lack of gas distributor No. 1 lack of gas pipeline (7), No. 2 lack of gas pipelines (8), No. 3 lack of gas pipelines (9) are entered.
No. 1 pulverized coal distributor discharge nozzle (10), No. 1 lack of gas pipeline (7) and No. 1 powder feeding pipes (13) difference as shown in Figure 1
It is connected with No. 1 air and powder mixer (19)；No. 2 pulverized coal distributor discharge nozzles (11), No. 2 lack of gas pipelines (8) and No. 2 powder feeding pipes
(14) it is connected respectively with No. 2 air and powder mixers (20)；No. 3 pulverized coal distributor discharge nozzles (12), No. 3 lack of gas pipelines (9) and No. 3
Powder feeding pipes (15) are connected (21) with No. 3 air and powder mixers respectively.
When boiler load changes, when ensureing that breeze airflow speed is in prescribed limit, No. 0 lack of gas pipeline valve is adjusted
(34) lack of gas flow, according to the weary tolerance pulverized coal conveying for meeting optimal pulverized coal concentration, unnecessary lack of gas are through No. 0 lack of gas pipeline (33)
It is sent into burner hearth.When load reduction, the powder sending quantity needed for boiler combustion gradually decreases, and meets the weary tolerance of optimal pulverized coal concentration
Reduced with the reduction of powder sending quantity, when according to the weary tolerance pulverized coal conveying for meeting optimal pulverized coal concentration, the wind in powder feeding pipes
When speed can not ensure that breeze airflow does not deposit, close No. 1 pulverized coal distributor discharge nozzle (10) and No. 1 lack of gas pipeline (16) with
Reduce total flow area of powder feeding pipes, improve powder feeding air-flow velocity.If load continues to reduce, when No. 1 pulverized coal distributor of closing
When discharge nozzle (10) and No. 1 lack of gas pipeline (16) can not meet that breeze airflow does not deposit this condition, No. 2 coal dusts point are closed
Orchestration discharge nozzle (11) and No. 2 lack of gas pipelines (17) further reduce powder feeding pipes flow area, ensure the flow velocity of powder feeding air-flow
In rational scope.Weary tolerance due to being sent into burner is reduced as Coal-fired capacity is reduced, therefore is reduced and be sent into master
The air capacity of combustion zone, the oxygen concentration in main burning area is reduced, reduces NOxGrowing amount.
Claims (6)
1. a kind of single nozzles multitube of correspondence combines half direct-firing vent pulverized coal handling system, it is characterised in that：Including pulverized-coal collector
(6) flapper (27), main pulverized coal distributor (5), secondary pulverized coal distributor (4), mill exhauster (36), lack of gas bellows (37), master, are rotated
Lack of gas distributor (32), secondary lack of gas distributor (3), No. 1 pulverized coal distributor discharge nozzle (10), No. 2 pulverized coal distributor discharge nozzles
(11), No. 3 pulverized coal distributor discharge nozzles (12), No. 1 lack of gas pipeline (7), No. 2 lack of gas pipelines (8), No. 3 lack of gas pipelines (9), No. 0
Lack of gas pipeline (33), No. 1 air and powder mixer (19), No. 2 air and powder mixers (20), No. 3 air and powder mixers (21), No. 1 powder feeding pipe
Road (13), No. 2 powder feeding pipes (14), No. 3 powder feeding pipes (15), lack of gas nozzle (26), the control valve of each pipeline, connection are each
The pipeline of individual device and multiport burner corresponding with sending pipeline (25).
2. the single nozzles multitube of a kind of correspondence according to claim 1 combines half direct-firing vent pulverized coal handling system, its feature exists
In：Coal dust, into main pulverized coal distributor (5), is distributed after the separation of pulverized-coal collector (6) wind powder by main pulverized coal distributor (5)
No. 1 coal dust point is respectively enterd to the secondary pulverized coal distributor (4) being sent into corresponding to each burner, then through secondary pulverized coal distributor (4)
Orchestration discharge nozzle (10), No. 2 pulverized coal distributor discharge nozzles (11), No. 3 pulverized coal distributor discharge nozzles (12).
3. the single nozzles multitube of a kind of correspondence according to claim 1 combines half direct-firing vent pulverized coal handling system, its feature exists
In：Lack of gas are after the separation of pulverized-coal collector (6) wind powder, into main lack of gas distributor (32), by main lack of gas distributor (32) point
With the secondary lack of gas distributor (3) entered corresponding to each burner, then No. 1 lack of gas are respectively enterd after secondary lack of gas distributor (3)
Pipeline (7), No. 2 lack of gas pipelines (8), No. 3 lack of gas pipelines (9), unnecessary lack of gas are sent into lack of gas nozzle by No. 0 lack of gas pipeline (33)
(26)。
4. the single nozzles multitube of correspondence according to claim 1 combines half direct-firing vent pulverized coal handling system, it is characterised in that：Coal
Powder is mixed by No. 1 pulverized coal distributor discharge nozzle (10) into No. 1 air and powder mixer (19) with the lack of gas of No. 1 lack of gas pipeline (7)；Coal
Powder is mixed by No. 2 pulverized coal distributor discharge nozzles (11) into No. 2 air and powder mixers (20) with the lack of gas of No. 2 lack of gas pipelines (8)；Coal
Powder is mixed by No. 3 pulverized coal distributor discharge nozzles (12) into No. 3 air and powder mixers (21) with the lack of gas of No. 3 lack of gas pipelines (9).
5. the single nozzles multitube of a kind of correspondence according to claim 1 combines half direct-firing vent pulverized coal handling system, its feature exists
In：No. 1 pulverized coal distributor discharge nozzle (10), No. 2 pulverized coal distributor discharge nozzles (11), No. 3 pulverized coal distributor discharge nozzles (12), 0
Number lack of gas pipeline (33), No. 1 lack of gas pipeline (7), No. 2 lack of gas pipelines (8), No. 3 lack of gas pipelines (9) configure control valve.
6. the single nozzles multitube of a kind of correspondence according to claim 1 combines half direct-firing vent pulverized coal handling system, its feature exists
In：The system uses multi-pipe-diameter combined type lack of gas airduct, the airduct quantity at least 3, opens regulating valve by closing, regulation
Total flow area of powder feeding pipes, it can be run according to power plant it needs to be determined that powder feeding pipe number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610546208.2A CN107606636A (en) | 2016-07-12 | 2016-07-12 | A kind of single nozzles multitube of correspondence combines half direct-firing vent pulverized coal handling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610546208.2A CN107606636A (en) | 2016-07-12 | 2016-07-12 | A kind of single nozzles multitube of correspondence combines half direct-firing vent pulverized coal handling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107606636A true CN107606636A (en) | 2018-01-19 |
Family
ID=61054780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610546208.2A Pending CN107606636A (en) | 2016-07-12 | 2016-07-12 | A kind of single nozzles multitube of correspondence combines half direct-firing vent pulverized coal handling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107606636A (en) |
-
2016
- 2016-07-12 CN CN201610546208.2A patent/CN107606636A/en active Pending
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180119 |
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| WD01 | Invention patent application deemed withdrawn after publication |