CN104776440B - The multi-functional powder feed system of warehouse formula in the middle of low speed coal mill - Google Patents
The multi-functional powder feed system of warehouse formula in the middle of low speed coal mill Download PDFInfo
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- CN104776440B CN104776440B CN201510197911.2A CN201510197911A CN104776440B CN 104776440 B CN104776440 B CN 104776440B CN 201510197911 A CN201510197911 A CN 201510197911A CN 104776440 B CN104776440 B CN 104776440B
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Abstract
The multi-functional powder feed system of warehouse formula in the middle of low speed coal mill of the present invention, including primary air fan, pressure fan, air preheater, feeder, coal pulverizer, mill separator, pulverized-coal collector, powder cabin, Powder discharging fan, bellows, weary gas bellows, air and powder mixer, high speed OFA spouts, main burner and boiler etc., it is using middle warehouse formula low speed coal mill pulverized coal carried by hot air pulverized coal preparation system as prototype, Powder discharging fan is exported into weary gas led to through weary gas transfer pipe near First air hot blast and form weary gas bellows side by side with a bellows, weary gas is sent into hot-blast pipe line by weary gas branch pipe, pulverized coal conveying after weary gas is mixed after being mixed with hot blast by air and powder mixer with coal dust, and then can effectively adjust primary wind and powder mixture temperature.The multi-functional powder feed system of the present invention can meet the requirement of anthracite, meager coal to combustion stability, and the burn-proof and explosion prevention requirement of bituminous coal conveying can be met again.
Description
Technical field：
The invention belongs to generating plant pulverized coal boiler pulverized coal preparation system field, and in particular to warehouse formula is more in the middle of a kind of low speed coal mill
Function powder feed system.
Background technology：
Pulverized coal preparation system is the important component of generating plant pulverized coal boiler combustion system, and its main function is pulverized coal preparation and defeated
Send, the coal dust of qualified fineness and the wind powder mixture of suitable temperature are provided for boiler.Pulverized-coal fired boiler is different according to fuel performance, can
It is divided into meager coal anthracite-fired boiler and bituminous coal fired boiler, pulverized coal preparation system type selecting is carried out according to design coal difference, generally a kind of powder processed
System is only applicable to a kind of coal of property.Warehouse formula low speed coal mill system operation is reliable in the middle of conventional, coal adaptability
It is relatively strong, anthracite and meager coal can be both ground, bituminous coal can also be ground, meager coal anthracite-fired boiler generally selects primary wind and powder mixing
The higher pulverized coal carried by hot air mode of thing temperature, bituminous coal fired boiler is typically chosen the relatively low transporting pulverized coal with exhaust gas side of primary wind and powder mixture temperature
Formula；Automatic powder feeding system will may be only available for a kind of coal of property, single meager coal anthracite or single bituminous coal, nothing once selecting
Method is taken into account, and coal accommodation is very limited.
Whether pulverized coal carried by hot air mode or transporting pulverized coal with exhaust gas mode, can only adapt to meager coal anthracite or bituminous coal grind and
Conveying, it is impossible to take into account.Under current coal market change complexity, coal price risk frequently situation, bituminous coal and meager coal are smokeless
The price of coal often has larger gap, and fluctuating range is larger, and this pulverized coal preparation system for being only applicable to single coal is in very great Cheng
The coal-fired buying economy and fuel supply security of power plant are have impact on degree.
The content of the invention：
It is an object of the invention to overcome above-mentioned technical problem, there is provided warehouse formula in the middle of a kind of low speed coal mill is multi-functional
Powder feed system so that the ball type pulverizer system, can both ensure that boiler used the low-volatite coal powder feeding such as meager coal and anthracite
Security and economy, also cause boiler not reduced in the security and economy for using the high volatile coal powder feeding such as bituminous coal.
To reach above-mentioned purpose, the present invention, which is adopted the following technical scheme that, to be achieved：
The multi-functional powder feed system of warehouse formula in the middle of low speed coal mill, including primary air fan and pressure fan, primary air fan and send
The outlet of blower fan is all connected with the entrance of air preheater, and the hot Secondary Air outlet of air preheater is divided into two-way, pot is connected all the way
The hot Secondary Air entrance of stove main burner, another road connects the hot Secondary Air entrance of coal pulverizer, while the raw coal entrance of coal pulverizer
The outlet of feeder is connected, the discharge of coal pulverizer connects the entrance of mill separator, and the outlet connection of mill separator is thin
The entrance of powder separator, the discharge of pulverized-coal collector connects the entrance of powder cabin, the weary gas outlet connection row of pulverized-coal collector
The entrance of powder blower fan, the coal powder entrance of the outlet connection air and powder mixer of powder cabin；The weary gas outlet of Powder discharging fan is divided into three tunnels, the
The weary gas entrance of coal pulverizer, the weary gas blowout mouthful entrance of the second tunnel connection main burner, the weary gas bellows of the 3rd tunnel connection are connected all the way
Weary gas entrance；The heat primary air outlet of air preheater is divided into two-way, and the entrance of a bellows, another road connection are connected all the way
The powder feeding medium inlet of air and powder mixer is connected after the outlet mixing of the entrance of high speed OFA spouts, a bellows and weary gas bellows,
The wind powder mixture entrance of the outlet connection main burner of air and powder mixer.
Further improve of the invention is：Also include coal bunker, coal bunker is used to be feeder coal supply.
Further improve of the invention is：The pipe of the entrance of bellows of heat primary air outlet connection for air preheater
Powder feeding hot-blast main regulation door is provided with road, the entrance of the heat primary air outlet connection high speed OFA spouts of air preheater
High speed OFA air quantity regulation door is provided with pipeline.
Further improve of the invention is：The weary gas blowout mouthful entrance of the weary gas outlet connection main burner of Powder discharging fan
Boiler tertiary air pipe isolation door, the pipeline of the weary gas entrance of the weary gas bellows of weary gas outlet connection of Powder discharging fan are provided with pipeline
On be provided with powder sending air laeking isolation door.
Further improve of the invention is：The regulation of First air branch pipe hot blast is provided with the export pipeline of bellows
The weary controlled atmosphere section door of First air branch pipe is provided with door, the export pipeline of weary gas bellows.
Relative to prior art, the present invention has following beneficial effect：
The multi-functional powder feed system of warehouse formula in the middle of low speed coal mill of the present invention, it can need not increase system capital equipment and right
Existing the ball type pulverizer system is transformed on a large scale, i.e. the function of pulverized coal carried by hot air, transporting pulverized coal with exhaust gas and weary gas and hot air powder feed system,
And can enable boiler powder feed system according to the Coal Characteristics of the actual as-fired coal of boiler this several pulverized coal preparation system it
Between free switching.The adaptability of boiler and pulverized coal preparation system to coal is improved, widening the coal-fired buying scope of power plant, there is provided power plant
Effectiveness of operation, it is ensured that security and economy that boiler and pulverized coal preparation system are run when using Coal rank.
Further, the weary gas transfer system set in the present invention is equiped with isolation door and regulation door, it is possible to achieve hot blast
Switching between powder feed system, vent pulverized coal handling system and weary gas and hot air composite powder feeding system so that powder feed system disclosure satisfy that
The need for the Coal ranks such as meager coal, anthracite and bituminous coal safety, economic powder feeding.
Brief description of the drawings：
Fig. 1 is the structural representation of the multi-functional powder feed system of warehouse formula in the middle of low speed coal mill of the present invention.
In figure：1 is primary air fan, and 2 be pressure fan, and 3 be air preheater, and 4 be coal bunker, and 5 be feeder, and 6 be coal pulverizer,
7 be mill separator, and 8 be pulverized-coal collector, and 9 be powder cabin, and 10 be Powder discharging fan, and 11 be a bellows, and 12 be First air branch pipe
Hot blast adjusts door, and 13 be that transporting pulverized coal with exhaust gas airduct completely cuts off door, and 14 be weary gas bellows, and 15 be the weary controlled atmosphere section door of First air branch pipe, and 16 are
Air and powder mixer, 17 be that boiler tertiary air pipe completely cuts off door, and 18 be that powder feeding hot-blast main adjusts door, and 19 be that high speed OFA adjusts door, 20
It is main burner for high speed OFA spouts, 21,22 be boiler.
Embodiment：
The present invention is described in further detail below in conjunction with the accompanying drawings.
Referring to Fig. 1, the multi-functional powder feed system of warehouse formula in the middle of low speed coal mill of the present invention, including primary air fan 1, pressure fan
2nd, air preheater 3, coal bunker 4, feeder 5, coal pulverizer 6, mill separator 7, pulverized-coal collector 8, powder cabin 9, Powder discharging fan 10,
Bellows 11, First air branch pipe hot blast regulation door 12, powder sending air laeking isolation door 13, weary gas bellows 14, the weary gas of First air branch pipe
Door 15, air and powder mixer 16, boiler tertiary air pipe isolation door 17, powder feeding hot-blast main regulation door 18, high speed OFA air quantity is adjusted to adjust
Section door 19, high speed OFA spouts 20, main burner 21 and boiler 22.
Wherein, coal bunker 4 is used to be the coal supply of feeder 5, the raw coal of the outlet connection coal pulverizer 6 of feeder 5 in steam generator system
Entrance, the discharge of coal pulverizer 6 connects the entrance of mill separator 7, the outlet connection pulverized-coal collector 8 of mill separator 7
Entrance, the outlet of pulverized-coal collector 8 is divided into weary gas outlet and discharge, the entrance of weary gas outlet connection Powder discharging fan 10,
Discharge connects the entrance of powder cabin 9, the coal powder entrance of the outlet connection air and powder mixer 16 of powder cabin 9；Primary air fan 1 and air-supply
The entrance that the outlet of machine 2 is all connected with air preheater 3 is connected, and the heat primary air outlet of air preheater 3 is divided into two-way, connects all the way
Connect the entrance of a bellows 11, the entrance of another road connection high speed OFA spouts 20, the hot Secondary Air outlet point of air preheater 3
For two-way, the hot Secondary Air entrance of the main burner 21 of boiler 22 is connected all the way, and the hot Secondary Air of another road connection coal pulverizer 6 enters
Mouthful；The weary gas outlet of Powder discharging fan 10 is divided into three tunnels, and the first via connects the weary gas entrance of coal pulverizer 6, the second tunnel connection main burning
The weary gas blowout mouthful entrance of device 21, feeding burner hearth 22 is burnt, and the 3rd tunnel connects the weary gas entrance of weary gas bellows 14；Bellows
11 hot-blast outlet is connected with the weary gas outlet of weary gas bellows 14 by respective pipeline with First air powder feeding pipes, weary gas and heat
The mixture of wind is connected with the powder feeding medium inlet of air and powder mixer 16, and powder feeding medium is mixed with coal dust in air and powder mixer 16
Afterwards, it is connected by pipeline with the entrance of main burner 21, wind powder mixture passes through the group of a wind snout in main burner 21
Knit and burnt in the feeding burner hearth of boiler 22.
It is total that powder feeding hot blast is provided with the pipeline of the entrance of bellows 11 of heat primary air outlet connection for air preheater 3
Pipe adjusts door 18, sends into the First air air quantity of a bellows 11 and can be adjusted by powder feeding hot-blast main regulation door 18, empty
High speed OFA air quantity regulation door is provided with the pipeline of the entrance of the heat primary air outlet connection high speed OFA spouts 20 of air preheater 3
The heat primary air air quantity of the entrance of 19, feeding high speed OFA spout 20 can adjust door 18 by high speed OFA air quantity and be adjusted.
Boiler three is provided with the pipeline of the weary gas blowout mouthful entrance of the weary gas outlet connection main burner 21 of Powder discharging fan 10
Secondary airduct, which completely cuts off on door 17, the pipeline of the weary gas entrance of the weary gas bellows 14 of weary gas outlet connection of Powder discharging fan 10, is provided with powder feeding
The weary exhausted door 13 of air bound；The weary gas outlet of Powder discharging fan 10 completely cuts off door 17 by boiler tertiary air pipe and transporting pulverized coal with exhaust gas airduct completely cuts off door
13 progress are completely isolated, realize that Powder discharging fan 10 exports the powder feeding function of weary gas or is sent directly into cutting for hearth combustion two ways
Change.
Powder feeding hot blast rate from a bellows 11 in the hot-wind inlet of above-mentioned air and powder mixer 16 can pass through First air
Branch pipe hot blast regulation door 12 is adjusted, the powder sending air laeking air quantity from weary gas bellows 14 in the weary gas entrance of air and powder mixer 16
It can be adjusted by the weary controlled atmosphere section door 15 of First air branch pipe.
The present invention realizes the regulation of weary gas and hot blast ratio in powder feeding medium by the above method, and then realizes that powder feeding is situated between
Matter is the switching of full hot blast, complete weary gas or weary gas and hot blast mixture, i.e., it is of the invention by adjust can realize pulverized coal carried by hot air, it is weary
The function of pneumatic transmission powder and weary gas/three kinds of powder feed systems of hot blast composite powder feeding.The present invention need not be to storing up formula in air preheater etc.
The equipment of pulverized coal preparation system is transformed, you can realize the switching between three kinds of powder feed systems, it is to avoid the system triggered by coal type change
Powder system mixes cold wind operation, influences the economy of boiler.On the other hand, weary gas is mixed with hot blast two media in powder feeding pipes
Close, it is to avoid the coal dust potential safety hazard that the string of deposits is come in bellows entrained by weary gas, it is ensured that the security of system operation.
Claims (2)
1. the multi-functional powder feed system of warehouse formula in the middle of low speed coal mill, it is characterised in that：Including primary air fan (1) and pressure fan
(2), the outlet of primary air fan (1) and pressure fan (2) is all connected with the entrance of air preheater (3), the heat two of air preheater (3)
Secondary wind outlet is divided into two-way, and the hot Secondary Air entrance of boiler (22) main burner (21) is connected all the way, and another road connects coal pulverizer
(6) hot Secondary Air entrance, while the outlet of the raw coal entrance connection feeder (5) of coal pulverizer (6), the coal dust of coal pulverizer (6)
The entrance of outlet connection mill separator (7), the entrance of the outlet connection pulverized-coal collector (8) of mill separator (7), fine powder point
From the entrance of the discharge connection powder cabin (9) of device (8), the weary gas outlet connection Powder discharging fan (10) of pulverized-coal collector (8)
Entrance, the coal powder entrance of the outlet connection air and powder mixer (16) of powder cabin (9)；The weary gas outlet of Powder discharging fan (10) is divided into three
Road, the weary gas entrance of first via connection coal pulverizer (6), the weary gas blowout mouthful entrance of the second tunnel connection main burner (21), the 3rd tunnel
Connect the weary gas entrance of weary gas bellows (14)；The heat primary air outlet of air preheater (3) is divided into two-way, and First air is connected all the way
The entrance of case (11), the entrance of another road connection high speed OFA spouts (20), the outlet of a bellows (11) and weary gas bellows (14)
The powder feeding medium inlet of air and powder mixer (16) is connected after mixing, the outlet connection main burner (21) of air and powder mixer (16)
Wind powder mixture entrance；
Also include coal bunker (4), coal bunker (4) is used to be feeder (5) coal supply；
It is total that powder feeding hot blast is provided with the pipeline of the entrance of bellows (11) of heat primary air outlet connection for air preheater (3)
Set on pipe regulation door (18), the pipeline of the entrance of the heat primary air outlet connection high speed OFA spouts (20) of air preheater (3)
There is high speed OFA air quantity to adjust door (19)；
Boiler three is provided with the pipeline of the weary gas blowout mouthful entrance of the weary gas outlet connection main burner (21) of Powder discharging fan (10)
Set on secondary airduct isolation door (17), the pipeline of the weary gas entrance of the weary gas bellows (14) of weary gas outlet connection of Powder discharging fan (10)
There is powder sending air laeking to completely cut off door (13).
2. the multi-functional powder feed system of warehouse formula in the middle of low speed coal mill according to claim 1, it is characterised in that：First air
It is provided with First air branch pipe hot blast regulation door (12), the export pipeline of weary gas bellows (14) and sets on the export pipeline of case (11)
The once weary controlled atmosphere section door (15) of wind branch pipe.
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| CN107420933B (en) * | 2017-08-30 | 2023-07-25 | 西安西热锅炉环保工程有限公司 | Exhaust-heat primary air heat exchanger system for hot air powder feeding system of ball mill |
| CN108443907A (en) * | 2018-04-04 | 2018-08-24 | 武汉武锅能源工程有限公司 | A kind of pulverized coal preparation system and its milling method of medium-speed pulverizer warehouse formula pulverized-coal fired boiler |
| CN108728145A (en) * | 2018-08-03 | 2018-11-02 | 西安热工研究院有限公司 | A kind of pulverized coal pyrolysis coupling direct generation of electricity system |
| CN109237465B (en) * | 2018-10-30 | 2024-03-19 | 北京巴布科克·威尔科克斯有限公司 | Cyclone burner and cyclone burner ventilation air methane spraying system |
| CN109798516A (en) * | 2019-01-08 | 2019-05-24 | 武汉耀立环保工程有限公司 | The warehouse style pulverized coal carried by hot air method of efficient low-discharging and its system |
| CN109654524A (en) * | 2019-02-20 | 2019-04-19 | 西安西热锅炉环保工程有限公司 | It is a kind of using furnace cigarette as the bin storage type pulverizing system of Single Medium and method |
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| CN102798134B (en) * | 2011-05-27 | 2015-07-08 | 中国电力工程顾问集团东北电力设计院 | Furnace smoke drying and water recycling warehouse-type fan mill hot air powder supplying and making system |
| JP6019565B2 (en) * | 2011-11-16 | 2016-11-02 | 株式会社Ihi | Fine powder fuel supply method for oxyfuel boiler and oxyfuel boiler system |
| CN203116490U (en) * | 2013-03-18 | 2013-08-07 | 施大钟 | Brown coal drying and combusting system with gas exhaust heat energy and water recovery function |
| CN103216840B (en) * | 2013-04-15 | 2015-08-12 | 黄立新 | Formula of storing up in coal-burning boiler coal pulverizer reduces nitric oxide system |
| CN104344398B (en) * | 2013-07-31 | 2016-08-10 | 烟台龙源电力技术股份有限公司 | Middle warehouse formula pulverized coal carried by hot air pulverized coal preparation system |
| CN204176665U (en) * | 2014-09-30 | 2015-02-25 | 上海援梦电力能源科技咨询中心 | The pulverized coal preparation system that medium-speed pulverizer and fan mill combine |
| CN204176664U (en) * | 2014-09-30 | 2015-02-25 | 上海援梦电力能源科技咨询中心 | The pulverized coal preparation system that air swept mill and fan mill combines |
| CN204611813U (en) * | 2015-04-23 | 2015-09-02 | 西安西热锅炉环保工程有限公司 | The multi-functional powder feed system of warehouse formula in the middle of low speed coal mill |
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