CN106179685A - The fan mill arrangement system of tower 350MW super critical boiler and method for arranging - Google Patents
The fan mill arrangement system of tower 350MW super critical boiler and method for arranging Download PDFInfo
- Publication number
- CN106179685A CN106179685A CN201610767850.3A CN201610767850A CN106179685A CN 106179685 A CN106179685 A CN 106179685A CN 201610767850 A CN201610767850 A CN 201610767850A CN 106179685 A CN106179685 A CN 106179685A
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- China
- Prior art keywords
- coal
- boiler
- mill
- described blower
- fan
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
- F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2201/00—Pretreatment of solid fuel
- F23K2201/10—Pulverizing
- F23K2201/1006—Mills adapted for use with furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2203/00—Feeding arrangements
- F23K2203/002—Feeding devices for steam boilers, e.g. in locomotives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2203/00—Feeding arrangements
- F23K2203/20—Feeding/conveying devices
- F23K2203/201—Feeding/conveying devices using pneumatic means
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
Abstract
The present invention relates to fan mill arrangement system and the method for arranging of a kind of tower 350MW super critical boiler.The problems such as the type selecting of pulverized coal preparation system is most important for the design of high water content brown coal boiler, uses medium-speed pulverizer to there is drying capacity not enough, and exhaust gas temperature is high, medium-speed pulverizer is used to need the highest primary air ratio, secondary air flow is reduced, it is impossible to realize low-temperature burning, unfavorable for reducing the discharge of NOx.Present invention composition includes: eight desk fan coal pulverizers (2), eight described blower mills are arranged in the surrounding of boiler furnace (1), every face wall region of boiler is respectively arranged two described blower mills, eight described blower mills form radial arrangement, described blower mill is connected with pulverized coal channel (4), described pulverized coal channel is connected with coal burner (3), and described blower mill is connected with high-temperature furnace smoke pipeline (5).The present invention is for the fan mill arrangement system of tower 350MW super critical boiler.
Description
Technical field:
The present invention relates to fan mill arrangement system and the method for arranging of a kind of tower 350MW super critical boiler.
Background technology:
The type selecting of pulverized coal preparation system is most important for the design of high water content brown coal boiler, if using medium-speed pulverizer to there is drying capacity
Deficiency, the problems such as exhaust gas temperature is high, use medium-speed pulverizer to need the highest primary air ratio so that secondary air flow reduces, it is impossible to realize
Low-temperature burning, unfavorable for reducing the discharge of NOx.Use high-temperature flue gas, hot blast, three medium fanned powder-grinding systems of black furnace cigarette
Easily reach drying capacity, solve the problem that uses of high water content brown coal, but owing to fan mill lifting pressure head is low, should try one's best
Shortening pulverized coal channel length, high-temperature flue gas, hot blast, three kinds of pipe arrangements of cold smoke take up room greatly, and fan mill needs space for maintenance
Greatly, the time between overhauls(TBO) is short, so the layout of fan mill is a difficult problem all the time.
Summary of the invention:
It is an object of the invention to provide fan mill arrangement system and the method for arranging of a kind of tower 350MW super critical boiler.
Above-mentioned purpose is realized by following technical scheme:
The fan mill arrangement system of a kind of tower 350MW super critical boiler, its composition includes: eight desk fan coal pulverizers, eight institutes
The blower mill stated is arranged in the surrounding of boiler furnace, and every face wall region of boiler is respectively arranged two described fan coal-grindings
Machine, eight described blower mills form radial arrangement, and described blower mill is connected with pulverized coal channel, described coal
Powder pipeline is connected with coal burner, and described blower mill is connected with high-temperature furnace smoke pipeline.
The fan mill arrangement system of described tower 350MW super critical boiler, described coal burner is arranged in boiler
Four sides wall on, every face wall of boiler is respectively arranged the coal burner described in two groups, of the coal burner described in eight groups
Secondary wind jet forms the burning circle of contact in stove.
The fan mill arrangement system of a kind of tower 350MW super critical boiler and method for arranging, the method comprises the steps:
First blower mill is arranged in boiler furnace surrounding, and every face wall region of boiler is respectively arranged two desk fan coal pulverizers, and eight
Blower mill described in platform forms radial layout, and coal burner is arranged on four sides wall, and every face wall arranges two groups
Coal burner, the primary air jet of eight groups of coal burners forms the burning circle of contact, described blower mill and institute in stove
The coal burner stated is connected by pulverized coal channel, high-temperature furnace smoke pipeline from primary superheater bottom section extracting high-temperature stove cigarette,
Every face wall of boiler is respectively arranged two high-temperature furnace smoke pipelines, connects smoke point and blower mill, quoted from preheater outlet
Hot blast, low-temperature flue gas quoted from dedusting downstream enter described fan coal-grinding after mixing in high-temperature furnace smoke pipeline with high-temperature flue gas
Machine, by regulating the ratio of above-mentioned three kinds of dry media, the blower mill entrance desiccant temperature described in adjustment, carries out coal dust
It is dried；
Described blower mill, described coal burner, described high-temperature furnace smoke pipeline are sat around a fire layout, effectively utilize boiler
Surrounding volume, had both arranged described blower mill, described pulverized coal channel, described high-temperature furnace smoke pipeline, the most reasonably
Reserve the space for maintenance of described blower mill, shorten described pulverized coal channel and the cloth of described high-temperature furnace smoke pipeline
Put length, reduce the resistance containing powder First air, solve the Layout Problem of the described blower mill of burning high-moisture brown coal,
Effectively improve the operation conditions of high water content brown coal pulverized coal preparation system, combustion system, have a good application prospect.
Beneficial effect:
1. the present invention is fan mill arrangement system and the method for arranging of a kind of tower 350MW super critical boiler, is surpassed by tower 350MW
Eight coal pulverizers of boilers are sat around a fire layout according to " radiation " type, not only shorten pulverized coal channel length, and reasonable Arrangement is dried
Medium pipeline, solves the Layout Problem of tower eight coal pulverizers of 350MW super critical boiler.
The blower mill of the present invention, coal burner, pulverized coal channel, high-temperature furnace smoke pipeline are sat around a fire layout, are formed complete
" radiation " type arrange, be arranged so as to effectively reduce the floor space of layout of boiler, shorten pulverized coal channel length, reduce containing powder one
The resistance of secondary wind, solves the Layout Problem of the blower mill of burning high-moisture brown coal, effectively improves high water content brown coal system
Powder system, the operation conditions of combustion system.
Accompanying drawing illustrates:
Accompanying drawing 1 is the structural representation of the present invention.
Detailed description of the invention:
Embodiment 1:
The fan mill arrangement system of a kind of tower 350MW super critical boiler, its composition includes: eight desk fan coal pulverizers 2, eight institutes
The blower mill stated is arranged in the surrounding of boiler furnace 1, and every face wall region of boiler is respectively arranged two described fan mills
Coal machine, eight described blower mills form radial arrangement, and described blower mill is connected with pulverized coal channel 4, described
Pulverized coal channel be connected with coal burner 3, described blower mill is connected with high-temperature furnace smoke pipeline 5.
Embodiment 2:
According to the fan mill arrangement system of the tower 350MW super critical boiler described in embodiment 1, described coal burner is arranged
On the four sides wall of boiler, every face wall of boiler is respectively arranged the coal burner described in two groups, the coal dust firing described in eight groups
The primary air jet of device forms the burning circle of contact in stove.
Embodiment 3:
A kind of method for arranging of the fan mill arrangement system of the tower 350MW super critical boiler utilized described in embodiment 1-2, we
Method is that first blower mill is arranged in boiler furnace surrounding, and every face wall region of boiler is respectively arranged two desk fan coal-grindings
Machine, eight described blower mills form radial layout, and coal burner is arranged on four sides wall, and every face wall is arranged
Two groups of coal burners, the primary air jet of eight groups of coal burners forms the burning circle of contact, described blower mill in stove
Being connected by pulverized coal channel with described coal burner, high-temperature furnace smoke pipeline is from primary superheater bottom section extracting high-temperature stove
Cigarette, every face wall of boiler is respectively arranged two high-temperature furnace smoke pipelines, connects smoke point and blower mill, exports quoted from preheater
Hot blast, mix in high-temperature furnace smoke pipeline with high-temperature flue gas quoted from the low-temperature flue gas in dedusting downstream after enter described fan mill
Coal machine, by regulating the ratio of above-mentioned three kinds of dry media, the blower mill entrance desiccant temperature described in adjustment, carries out coal
Dried bean noodles is dry；
Described blower mill, described coal burner, described high-temperature furnace smoke pipeline are sat around a fire layout, effectively utilize boiler
Surrounding volume, had both arranged described blower mill, described pulverized coal channel, described high-temperature furnace smoke pipeline, the most reasonably
Reserve the space for maintenance of described blower mill, shorten described pulverized coal channel and the cloth of described high-temperature furnace smoke pipeline
Put length, reduce the resistance containing powder First air, solve the Layout Problem of the described blower mill of burning high-moisture brown coal,
Effectively improve the operation conditions of high water content brown coal pulverized coal preparation system, combustion system, have a good application prospect.
Claims (3)
1. a fan mill arrangement system for tower 350MW super critical boiler, its composition includes: eight desk fan coal pulverizers, and it is special
Levying and be: eight described blower mills are arranged in the surrounding of boiler furnace, every face wall region of boiler is respectively arranged two institutes
The blower mill stated, eight described blower mills form radial arrangement, described blower mill and pulverized coal channel
Connecting, described pulverized coal channel is connected with coal burner, and described blower mill is connected with high-temperature furnace smoke pipeline.
The fan mill arrangement system of tower 350MW super critical boiler the most according to claim 1, is characterized in that: described
Coal burner is arranged on the four sides wall of boiler, and every face wall of boiler is respectively arranged the coal burner described in two groups, eight groups
The primary air jet of described coal burner forms the burning circle of contact in stove.
3. a method for arranging for the fan mill arrangement system of the tower 350MW super critical boiler described in claim 1-2, it is special
Levying and be: the method comprises the steps: first to be arranged in by blower mill boiler furnace surrounding, every face wall region of boiler is divided
Not arranging that two desk fan coal pulverizers, eight described blower mills form radial layout, coal burner is arranged in four
On face wall, every face wall arranges two groups of coal burners, and the primary air jet of eight groups of coal burners forms burning in stove and cuts
Round, described blower mill and described coal burner are connected by pulverized coal channel, and high-temperature furnace smoke pipeline is overheated from one-level
Device bottom section extracting high-temperature stove cigarette, every face wall of boiler is respectively arranged two high-temperature furnace smoke pipelines, connects smoke point and fan
Coal pulverizer, the hot blast quoted from preheater outlet, the low-temperature flue gas quoted from dedusting downstream and high-temperature flue gas are in high-temperature furnace smoke pipeline
Described blower mill is entered, by regulating the ratio of above-mentioned three kinds of dry media, the fan coal-grinding described in adjustment after mixing
Machine entrance desiccant temperature, carries out coal dust and is dried；
Described blower mill, described coal burner, described high-temperature furnace smoke pipeline are sat around a fire layout, effectively utilize boiler
Surrounding volume, had both arranged described blower mill, described pulverized coal channel, described high-temperature furnace smoke pipeline, the most reasonably
Reserve the space for maintenance of described blower mill, shorten described pulverized coal channel and the cloth of described high-temperature furnace smoke pipeline
Put length, reduce the resistance containing powder First air, solve the Layout Problem of the described blower mill of burning high-moisture brown coal,
Effectively improve the operation conditions of high water content brown coal pulverized coal preparation system, combustion system, have a good application prospect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610767850.3A CN106179685A (en) | 2016-08-31 | 2016-08-31 | The fan mill arrangement system of tower 350MW super critical boiler and method for arranging |
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| CN201610767850.3A CN106179685A (en) | 2016-08-31 | 2016-08-31 | The fan mill arrangement system of tower 350MW super critical boiler and method for arranging |
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| CN106179685A true CN106179685A (en) | 2016-12-07 |
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| CN201610767850.3A Pending CN106179685A (en) | 2016-08-31 | 2016-08-31 | The fan mill arrangement system of tower 350MW super critical boiler and method for arranging |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106979532A (en) * | 2017-03-31 | 2017-07-25 | 高安市成兴实业有限公司 | Direct-fired coal dust supply system |
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Application publication date: 20161207 |