CN201295677Y - Structure of double-inlet and double-outlet pulverized coal classifier - Google Patents

Structure of double-inlet and double-outlet pulverized coal classifier Download PDF

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Publication number
CN201295677Y
CN201295677Y CNU2008201619663U CN200820161966U CN201295677Y CN 201295677 Y CN201295677 Y CN 201295677Y CN U2008201619663 U CNU2008201619663 U CN U2008201619663U CN 200820161966 U CN200820161966 U CN 200820161966U CN 201295677 Y CN201295677 Y CN 201295677Y
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CN
China
Prior art keywords
axle
pulverized coal
double
conical
powder
Prior art date
Application number
CNU2008201619663U
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Chinese (zh)
Inventor
杭文华
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无锡市华锦电力设备修造有限公司
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Priority to CNU2008201619663U priority Critical patent/CN201295677Y/en
Application granted granted Critical
Publication of CN201295677Y publication Critical patent/CN201295677Y/en

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Abstract

The utility model relates to a structure of a double-inlet and double-outlet pulverized coal classifier, in particular to a direct-blowing boiler unit provided with a double-inlet and double-outlet steel ball mill and applied to a pulverizing system in a thermal power plant, and belongs to a device for separating coarse powder from air-powder two-phase flow. The structure mainly adopts the technical scheme as follows: a pulverized coal distributor is mounted on an outer cylindrical body, the outer cylindrical body is connected with an outer conical body, an inner conical body is arranged inside the outer cylindrical body, and the inner conical body is arranged inside the outer conical body; a pulverized coal return bucket is connected with the lower end of the outer conical body, a pulverized coal return pipe of the pulverized coal return bucket is connected with a pulverized coal return air-lock device, and an upper baffle is arranged between the outer cylindrical body and the inner cylindrical body. The utility model is characterized in that a pulverized coal separating and adjusting device is arranged between the outer conical body and the inner conical body. The utility model has a simple, compact and reasonable structure; a deflector baffle the pulverizing system classifier has better fineness regulating property; the pulverized coal classifier has better anti-blocking function, and no sundries are arranged on the baffle; and the electric consumption and the coal consumption are reduced, so that 9600 tons of standard coals are saved for each furnace every year.

Description

Double inlet and outlet coal dust separator
Technical field
The utility model relates to a kind of double inlet and outlet coal dust separator, specifically is applicable to the boiler plant of the straight-blowing double-inlet and double-outlet steel ball mill in the pulverized coal preparation system of thermal power plant, belongs to the device that separates meal from gas-powder flow.
Background technology
Have in the technology at oneself, be used for separating the foreign material of raw coal and the fineness degree of combusting coal fines particle, normally adopt the mill separator that goes with each other all the time, this separator mainly by pulverized coal distributor, cylinder, inner cylinder, inner cone, Outer Taper, return the powder bucket and reach back powder air-lock device etc. and form.Owing to use coal to change greatly, it is not smooth to cause each position of this kind structure separator to be stopped up by the foreign material in the raw coal easily, and the separator weak effect, causes coal dust thick, and pulverized coal fineness is relatively poor.Bring the instability of boiler combustion, correspondingly increased the power consumption and the coal consumption of power plant, improved the cost of generating.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned weak point, thereby provides a kind of separator deflector baffle that fineness control characteristic is preferably arranged; Have " anti-blocking " function preferably, can not find foreign material on the baffle plate, and can reduce the double inlet and outlet coal dust separator of power consumption and coal consumption.
The technical scheme that provides according to the utility model, double inlet and outlet coal dust separator comprises that pulverized coal distributor, exterior circular column, inner cylinder, inner cone, Outer Taper, time powder bucket reach back the powder air-lock device, pulverized coal distributor is installed on the exterior circular column, exterior circular column is connected with Outer Taper, inner cylinder is set in exterior circular column, inner cone is set in the Outer Taper; Connect back the powder bucket in the Outer Taper lower end, the powder retrieving pipe that returns the powder bucket connects back the powder air-lock device, and higher level's baffle plate is set between exterior circular column and inner cylinder, and feature is that coal dust separation adjusting device is set between described Outer Taper and inner cone.
Described coal dust separation adjusting device is made up of interior axle bed, axle sleeve, inner axle, outer end axle, outer axle bed, gland, seal cover, nut, wear-resistant ceramic sheet and baffle plate.Baffle plate is provided with the wear-resistant ceramic sheet, and described baffle plate front end is provided with interior axle bed, and inner axle is housed in the interior axle bed, is with axle sleeve on the inner axle; Described baffle plate rear end is provided with the outer end axle, and the outer end axle is installed in the outer axle bed, and the outer end axle head is equipped with gland and seal cover, and also tight with nut.
Compared with the prior art the utility model has the following advantages:
The utility model is simple, compact and reasonable for structure; Pulverized coal preparation system separator deflector baffle has fineness control characteristic preferably; Choke preventing function is preferably arranged, no-sundries on the baffle plate; Can reduce power consumption and coal consumption, every stove can be saved about 9600 tons of standard coal every year.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the utility model separation adjusting apparatus structure schematic diagram.
Fig. 3 is the utility model fundamental diagram.
Fig. 4 is coal-grinding separation process figure under the utility model user mode.
The specific embodiment
Embodiment during following the utility model is incited somebody to action in conjunction with the accompanying drawings is further described:
The utility model is mainly by Fig. 1~shown in Figure 2, comprises that pulverized coal distributor 1, exterior circular column 2, inner cylinder 4, inner cone 5, Outer Taper 6, coal dust separation adjusting device 7 (axle bed 7-1, axle sleeve 7-2, inner axle 7-3, outer end axle 7-4, outer axle bed 7-5, gland 7-6, seal cover 7-7, nut 7-8, wear-resistant ceramic sheet 7-9 and baffle plate 7-10 in comprising, return powder bucket 8 and reach back powder air-lock device 9 etc.
Shown in Figure 3, comprise blower fan 10, coal pulverizer 11, feeder 13 and boiler 14 etc.
The utility model pulverized coal distributor 1 is installed on the exterior circular column 2, and exterior circular column 2 is connected with Outer Taper 6, and inner cylinder 4 is set in exterior circular column 2, and inner cone 5 is set in the Outer Taper 6; Connect back powder bucket 8 in Outer Taper 6 lower ends, the powder retrieving pipe that returns powder bucket 8 connects back powder air-lock device 9, and feature is that described exterior circular column 2 and 4 of inner cylinders are provided with higher level's baffle plate 3, and 5 of described Outer Taper 6 and inner cones are provided with coal dust separation adjusting device 7.
Described coal dust separation adjusting device 7 is made up of interior axle bed 7-1, axle sleeve 7-2, inner axle 7-3, outer end axle 7-4, outer axle bed 7-5, gland 7-6, seal cover 7-7, nut 7-8, wear-resistant ceramic sheet 7-9 and baffle plate 7-10.Baffle plate 7-10 is provided with wear-resistant ceramic sheet 7-9, and described baffle plate 7-10 front end is provided with interior axle bed 7-1, and inner axle 7-3 is housed in the interior axle bed 7-1, is with axle sleeve 7-2 on the inner axle 7-3; Described baffle plate 7-10 rear end is provided with outer end axle 7-4, and outer end axle 7-4 is installed in the outer axle bed 7-5, and outer end axle 7-4 axle head is equipped with gland 7-6 and seal cover 7-7, and also tight with nut 7-8.
The utility model operation principle and process:
As shown in Figure 3, with matching used blower fan 10, coal pulverizer 11, feeder 13 and the boiler 14 of comprising of the utility model.By feeder 13 raw coal is delivered to coal pulverizer 11 during work and carry out coal-grinding, effect by blower fan 10 is delivered to the utility model modified separator 12 that goes with each other all the time to the good coal of mill then, thin coal dust is delivered to boiler 14 directly to burn, thick coal dust is separated, and turns back to feeder 13 and arrives coal pulverizer 11 grindings more again.
The utility model air-flow carries the coal dust that coal pulverizer grinds and enters the middle part dilatation by returning powder bucket 8, and flow velocity slows down, and the coarse grain coal dust through returning powder lock air separation 9, comes back in the coal pulverizer and grinds under the effect of Gravity Separation.Remaining coal dust forms bump by coal dust separation adjusting device 7 again to be separated and centrifugation, forms a part of defective coal dust again, through returning powder lock air separation 9, comes back in the coal pulverizer and grinds again.Remaining coal dust forms centrifugation by top higher level's baffle plate 3, and defective coal dust through returning powder lock air separation 9, comes back in the coal pulverizer and grinds again along outer wall.Last qualified coal dust enters boiler completing combustion by pulverized coal distributor.

Claims (2)

1, a kind of double inlet and outlet coal dust separator, comprise that pulverized coal distributor (1), exterior circular column (2), inner cylinder (4), inner cone (5), Outer Taper (6), time powder bucket (8) reach back powder air-lock device (9), pulverized coal distributor (1) is installed on the exterior circular column (2), exterior circular column (2) is connected with Outer Taper (6), inner cylinder (4) is set in exterior circular column (2), inner cone (5) is set in the Outer Taper (6); Connect back powder bucket (8) in Outer Taper (6) lower end, the powder retrieving pipe that returns powder bucket (8) connects back powder air-lock device (9), between exterior circular column (2) and inner cylinder (4) higher level's baffle plate (3) is set, it is characterized in that being provided with coal dust separation adjusting device (7) between described Outer Taper (6) and inner cone (5).
2, double inlet and outlet coal dust separator according to claim 1, it is characterized in that described coal dust separation adjusting device (7) is by interior axle bed (7-1), axle sleeve (7-2), inner axle (7-3), outer end axle (7-4), outer axle bed (7-5), gland (7-6), seal cover (7-7), nut (7-8), wear-resistant ceramic sheet (7-9) and baffle plate (7-10) are formed, baffle plate (7-10) is provided with wear-resistant ceramic sheet (7-9), described baffle plate (7-10) front end is provided with interior axle bed (7-1), inner axle (7-3) is housed in the interior axle bed (7-1), is with axle sleeve (7-2) on the inner axle (7-3); Described baffle plate (7-10) rear end is provided with outer end axle (7-4), and outer end axle (7-4) is installed in the outer axle bed (7-5), and outer end axle (7-4) axle head is equipped with gland (7-6) and seal cover (7-7), and also tight with nut (7-8).
CNU2008201619663U 2008-10-24 2008-10-24 Structure of double-inlet and double-outlet pulverized coal classifier CN201295677Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2008201619663U CN201295677Y (en) 2008-10-24 2008-10-24 Structure of double-inlet and double-outlet pulverized coal classifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2008201619663U CN201295677Y (en) 2008-10-24 2008-10-24 Structure of double-inlet and double-outlet pulverized coal classifier

Publications (1)

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CN201295677Y true CN201295677Y (en) 2009-08-26

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101380630B (en) * 2008-10-24 2011-12-28 无锡市华锦电力设备修造有限公司 Double inlet and outlet coal dust separator
CN103239952A (en) * 2013-05-16 2013-08-14 浙江辰泰装饰材料有限公司 Gas-powder separating device for full-automatic molding-powder dustless stirrer
CN104864403A (en) * 2015-04-29 2015-08-26 北京新叶能源科技有限公司 Equalizing regulation device of boiler coal powder
CN105003665A (en) * 2015-08-14 2015-10-28 北京华清茵蓝科技有限公司 Regulating valve for pulverized coal distribution as well as pulverized coal feed pipe and separator applying regulating valves
CN105195341A (en) * 2015-06-09 2015-12-30 中国大唐集团科学技术研究院有限公司 Double-in and double-out steel ball coal mill shaft diameter combined separator
CN105344598A (en) * 2015-12-02 2016-02-24 江苏中能电力设备有限公司 Tandem axial double-baffle coarse powder separator
CN106040587A (en) * 2016-07-15 2016-10-26 江苏尚昆生物设备有限公司 Series-connection axial type double-baffle coarse powder separator

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101380630B (en) * 2008-10-24 2011-12-28 无锡市华锦电力设备修造有限公司 Double inlet and outlet coal dust separator
CN103239952A (en) * 2013-05-16 2013-08-14 浙江辰泰装饰材料有限公司 Gas-powder separating device for full-automatic molding-powder dustless stirrer
CN104864403A (en) * 2015-04-29 2015-08-26 北京新叶能源科技有限公司 Equalizing regulation device of boiler coal powder
CN105195341A (en) * 2015-06-09 2015-12-30 中国大唐集团科学技术研究院有限公司 Double-in and double-out steel ball coal mill shaft diameter combined separator
CN105003665A (en) * 2015-08-14 2015-10-28 北京华清茵蓝科技有限公司 Regulating valve for pulverized coal distribution as well as pulverized coal feed pipe and separator applying regulating valves
CN105344598A (en) * 2015-12-02 2016-02-24 江苏中能电力设备有限公司 Tandem axial double-baffle coarse powder separator
CN106040587A (en) * 2016-07-15 2016-10-26 江苏尚昆生物设备有限公司 Series-connection axial type double-baffle coarse powder separator

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C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20090826

Effective date of abandoning: 20081024