CN107606635A - Warehouse formula pulverized coal carried by hot air system among a kind of single nozzles multitube combination of correspondence - Google Patents
Warehouse formula pulverized coal carried by hot air system among a kind of single nozzles multitube combination of correspondence Download PDFInfo
- Publication number
- CN107606635A CN107606635A CN201610546206.3A CN201610546206A CN107606635A CN 107606635 A CN107606635 A CN 107606635A CN 201610546206 A CN201610546206 A CN 201610546206A CN 107606635 A CN107606635 A CN 107606635A
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- China
- Prior art keywords
- pulverized coal
- hot air
- air
- powder
- powder feeding
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The invention discloses a kind of middle warehouse formula pulverized coal carried by hot air system, belong to technical field of combustion equipment.The present invention solves the problems, such as that breeze airflow speed and powder feeding air-flow concentration can not coordinate control in pulverized coal channel under underload, while reduces the breeze airflow air output in main burning area under underload, advantageously reduces NOXGeneration.The present invention transform the single powder feeding pipes of corresponding single nozzles as more powder feeding pipes arranged side by side, the valve of each independent powder feeding pipes is controlled by closing (or unlatching) one by one when load reduction (or rise), adjust powder feeding pipes flow area, so as to while the optimal pulverized coal concentration of breeze airflow is maintained, ensure the flow velocity of breeze airflow in rational scope.The present invention improves the flexibility of breeze airflow regulation, is advantageous to the stable burning of boiler, so as to 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 middle warehouse formula pulverized coal carried by hot air system
System.
Background technology
In order to prevent coal dust from being deposited in a wind pipe, First air breeze airflow needs to maintain higher wind speed.And send
There is a theoretical optimal pulverized coal concentration in the breeze airflow for entering hearth combustion, coal powder density is too high or too low is all unfavorable for coal dust
Catch fire and burn.The sectional area of traditional boiler of power plant a wind pipe can not be adjusted, when boiler of power plant First air powder feeding pipe
In boiler load down, the Coal-fired capacity needed for boiler is reduced in road, if adjusting primary air flow according to maintenance optimal pulverized coal concentration, due to
First air powder feeding pipes sectional area can not change, and the First air breeze airflow flow velocity in powder feeding pipes will be less than breeze airflow not
The regulation flow velocity deposited.And if maintenance breeze airflow will reduce in higher wind speed, the concentration of coal dust, it is unfavorable for low
Breeze airflow stable ignition during load, the stable burning to boiler are unfavorable.Simultaneously because in order to maintain defined powder feeding gas velocity
Degree, the amount of oxygen by First air feeding burner hearth is more, causes main burning area oxygen concentration higher, can increase NOxGeneration.
The content of the invention
The purpose of patent of the present invention is to provide a kind of pulverized coal carried by hot air system applied to middle warehouse formula coal-burning boiler, its
The flow area of powder feeding pipes is adjustable, can meet the flow velocity of breeze airflow within the limits prescribed, while also can guarantee that once
Coal powder density is optium concentration in wind breeze airflow.
The purpose of patent of the present invention is achieved in that a kind of powder feed system of Multi-tube composite, 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 a wind pipe to change with load variations, is maintaining First air coal
When powder concentration is near optimum value, the primary air velocity in pipeline also can guarantee that in rational scope, to ensure breeze airflow not
Deposition and the stabilization of boiler combustion occurs.
Patent of the present invention reduces the air capacity for being sent into burner hearth main burning area under underload by First air, reduces main burning
The oxygen concentration in area, 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- boilers；2- air preheaters；3- pressure fan；4- feeders；5- declines drying
Pipe；6- coal pulverizers；7- wood block separators；8- mill separators；9- explosion proof doors；10- pulverized-coal collectors；11- rotates flapper；
12- wood scraps separators；13- commutators；14- moisture absorption pipes；15- packing augers；16- Pulverized Coal Bins；17- machine supplying powders；18- coal powder distribations
Device；19- primary air fans；20- lack of gas bellows；21- mill exhausters；22- secondary air box；23- burners；24- lack of gas nozzles；25- mono-
Secondary wind distributor；The cold and hot First air blenders of 26-；The cold and hot First air blenders of 27-；28-1 pulverized coal distributor discharge nozzles；29-
No. 2 pulverized coal distributor discharge nozzles；30-3 pulverized coal distributor discharge nozzles；31-1 hot air ducts；32-2 hot air ducts；33-3
Number hot air duct；34-1 pulverized coal distributors discharging tube valve；35-2 pulverized coal distributors discharging tube valve；36-3 coal dusts point
Orchestration discharging tube valve；37-1 hot air duct valves；38-2 hot air duct valves；39-3 hot air duct valves；40-1
Number air and powder mixer；41-2 air and powder mixers；42-3 air and powder mixers；43-1 powder feeding pipes；44-2 powder feeding pipes；
45-3 powder feeding pipes.
Embodiment
Warehouse formula pulverized coal carried by hot air system among a kind of single nozzles multitube combination of correspondence, as shown in figure 1, including Pulverized Coal Bin
(16), machine supplying powder (17), pulverized coal distributor (18), No. 1 pulverized coal distributor discharge nozzle (28), No. 2 pulverized coal distributor discharge nozzles
(29), No. 3 pulverized coal distributor discharge nozzles (30), air preheater (2), primary air fan (19), cold and hot First air blender (26), once
Wind distributor (25), No. 1 hot air duct (31), No. 2 hot air ducts (32), No. 3 hot air ducts (33), No. 1 air and powder mixer
(40), No. 2 air and powder mixers (41), No. 3 air and powder mixers (42), No. 1 powder feeding pipes (43), No. 2 powder feeding pipes (44), No. 3
The control valve and multiport burner corresponding with powder feeding pipes (23) of powder feeding pipes (45) and each pipeline.
As shown in Figure 1, coal dust respectively enters No. 1 pulverized coal distributor discharge nozzle (28), No. 2 coal dusts through pulverized coal distributor (18)
Distributor discharge pipe (29), No. 3 pulverized coal distributor discharge nozzles (30).
As shown in Figure 1, through First air distributor (25) point after hot and cold First air is mixed by cold and hot First air blender (26)
Jin Ru not No. 1 hot air duct (31), No. 2 hot air ducts (32), No. 3 hot air ducts (33).
No. 1 pulverized coal distributor discharge nozzle (28), No. 1 hot air duct (31) and No. 1 powder feeding pipes (43) difference as shown in Figure 1
It is connected with No. 1 air and powder mixer (40)；No. 2 pulverized coal distributor discharge nozzles (29), No. 2 hot air ducts (32) and No. 2 powder feeding pipes
Road (44) is connected with No. 2 air and powder mixers (41) respectively；No. 3 pulverized coal distributor discharge nozzles (30), No. 3 hot air ducts and No. 3
Powder feeding pipes (33) are connected with No. 3 air and powder mixers (45) respectively.
When boiler load changes, a wind flow is adjusted, coal is conveyed according to the primary air flow for meeting optimal pulverized coal concentration
Powder.When load reduction, the powder sending quantity needed for boiler combustion gradually decreases, and meets the primary air flow of optimal pulverized coal concentration also with sending
The reduction of powder amount and reduce, according to theoretical calculation when according to the primary air flow pulverized coal conveying for meeting optimal pulverized coal concentration, powder feeding
When wind speed in pipeline can not ensure that breeze airflow does not deposit, No. 1 pulverized coal distributor discharge nozzle (28) and No. 1 hot blast are closed
Pipeline (31) improves powder feeding air-flow velocity to reduce total flow area of powder feeding pipes.If load continues to reduce, when closing 1
When pulverized coal distributor discharge nozzle (28) and No. 1 hot air duct (31) can not meet that breeze airflow does not deposit this condition, close
Close No. 2 pulverized coal distributor discharge nozzles (29) and No. 2 hot air ducts (32) further reduce powder feeding pipes flow area, ensure powder feeding
The flow velocity of air-flow is in rational scope.Finally under conditions of optimal pulverized coal concentration is ensured, by flow control in defined model
In enclosing, while reduce and be sent into the primary air flow of burner hearth so as to reduce NOxGeneration.
Claims (6)
- A kind of 1. warehouse formula pulverized coal carried by hot air system among single nozzles multitube combination of correspondence, it is characterised in that：Including Pulverized Coal Bin (16), Machine supplying powder (17), pulverized coal distributor (18), No. 1 pulverized coal distributor discharge nozzle (28), No. 2 pulverized coal distributor discharge nozzles (29), No. 3 Pulverized coal distributor discharge nozzle (30), air preheater (2), primary air fan (19), cold and hot First air blender (26), First air distributor (25), No. 1 hot air duct (31), No. 2 hot air ducts (32), No. 3 hot air ducts (33), No. 1 air and powder mixer (40), No. 2 wind Powder mixer (41), No. 3 air and powder mixers (42), No. 1 powder feeding pipes (43), No. 2 powder feeding pipes (44), No. 3 powder feeding pipes And the control valve of each pipeline and multiport burner corresponding with powder feeding pipes (23) (45).
- 2. warehouse formula pulverized coal carried by hot air system among the single nozzles multitube combination of a kind of correspondence according to claim 1, its feature It is：Coal dust is after machine supplying powder (17) enters pulverized coal distributor, then respectively enters No. 1 pulverized coal distributor discharge nozzle (28), No. 2 coals Powder distributor discharge pipe (29), No. 3 pulverized coal distributor discharge nozzles (30).
- 3. warehouse formula pulverized coal carried by hot air system among the single nozzles multitube combination of a kind of correspondence according to claim 1, its feature It is：Hot and cold First air respectively enters No. 1 hot blast after cold and hot First air blender (26) mixes through First air distributor (25) Pipeline (31), No. 2 hot air ducts (32), No. 3 hot air ducts (33).
- 4. warehouse formula pulverized coal carried by hot air system among the single nozzles multitube combination of a kind of correspondence according to claim 1, its feature It is：Coal dust is entered the heat of No. 1 air and powder mixer (40) and No. 1 hot air duct (31) by No. 1 pulverized coal distributor discharge nozzle (28) Wind mixes；Coal dust enters No. 2 air and powder mixers (41) and No. 2 hot air ducts (32) by No. 2 pulverized coal distributor discharge nozzles (29) Hot blast mixes；Coal dust enters No. 3 air and powder mixers (42) and No. 3 hot air ducts (33) by No. 3 pulverized coal distributor discharge nozzles (30) Hot blast mixing.
- 5. warehouse formula pulverized coal carried by hot air system among the single nozzles multitube combination of a kind of correspondence according to claim 1, its feature It is：No. 1 pulverized coal distributor discharge nozzle (28), No. 2 pulverized coal distributor discharge nozzles (29), No. 3 pulverized coal distributor discharge nozzles (30), No. 1 hot air duct (31), No. 2 hot air ducts (32), No. 3 hot air ducts (33) configure control valve.
- 6. warehouse formula pulverized coal carried by hot air system among the single nozzles multitube combination of a kind of correspondence according to claim 1, its feature It is：The system uses multi-pipe-diameter combined type primary air piping, and described powder feeding pipe is at least three.Each tune is opened by closing Valve is saved, adjusts the flow area of powder feeding pipes, can be run according to power plant needs to adjust powder feeding pipe number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610546206.3A CN107606635A (en) | 2016-07-12 | 2016-07-12 | Warehouse formula pulverized coal carried by hot air system among a kind of single nozzles multitube combination of correspondence |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610546206.3A CN107606635A (en) | 2016-07-12 | 2016-07-12 | Warehouse formula pulverized coal carried by hot air system among a kind of single nozzles multitube combination of correspondence |
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| Publication Number | Publication Date |
|---|---|
| CN107606635A true CN107606635A (en) | 2018-01-19 |
Family
ID=61054755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610546206.3A Pending CN107606635A (en) | 2016-07-12 | 2016-07-12 | Warehouse formula pulverized coal carried by hot air system among a kind of single nozzles multitube combination of correspondence |
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| CN (1) | CN107606635A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108386866A (en) * | 2018-04-12 | 2018-08-10 | 扎克(青岛)船用设备有限公司 | Pulverized-coal fired boiler powder-supply system is from inerting and stablizes powder-supply system |
| CN113477389A (en) * | 2021-06-11 | 2021-10-08 | 华能国际电力股份有限公司大连电厂 | Control method and device of powder making system |
-
2016
- 2016-07-12 CN CN201610546206.3A patent/CN107606635A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108386866A (en) * | 2018-04-12 | 2018-08-10 | 扎克(青岛)船用设备有限公司 | Pulverized-coal fired boiler powder-supply system is from inerting and stablizes powder-supply system |
| CN108386866B (en) * | 2018-04-12 | 2023-11-24 | 扎克(青岛)船用设备有限公司 | Self-inerting and stable powder supply system of pulverized coal boiler |
| CN113477389A (en) * | 2021-06-11 | 2021-10-08 | 华能国际电力股份有限公司大连电厂 | Control method and device of powder making system |
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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 |