CN200989597Y - Bituminous concrete mixer pulverized-coal burner - Google Patents

Bituminous concrete mixer pulverized-coal burner Download PDF

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Publication number
CN200989597Y
CN200989597Y CN 200620053114 CN200620053114U CN200989597Y CN 200989597 Y CN200989597 Y CN 200989597Y CN 200620053114 CN200620053114 CN 200620053114 CN 200620053114 U CN200620053114 U CN 200620053114U CN 200989597 Y CN200989597 Y CN 200989597Y
Authority
CN
China
Prior art keywords
coal
powder
concrete mixer
burner
bituminous concrete
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.)
Expired - Fee Related
Application number
CN 200620053114
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Chinese (zh)
Inventor
陈乾锦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SANLIAN ROAD SURFACE MACHINERY FACTORY CHENZHOU CITY DEVELOPMENT ZONE
Original Assignee
SANLIAN ROAD SURFACE MACHINERY FACTORY CHENZHOU CITY DEVELOPMENT ZONE
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SANLIAN ROAD SURFACE MACHINERY FACTORY CHENZHOU CITY DEVELOPMENT ZONE filed Critical SANLIAN ROAD SURFACE MACHINERY FACTORY CHENZHOU CITY DEVELOPMENT ZONE
Priority to CN 200620053114 priority Critical patent/CN200989597Y/en
Application granted granted Critical
Publication of CN200989597Y publication Critical patent/CN200989597Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

A pulverized coal combustion device for asphalt concrete mixer comprises a pulverized coal preparing and conveying device, material outlet of which connects with material inlet of a combustion furnace through a powder conveying blowpipe. The pulverized coal preparing and conveying device includes a hanging roller pulverizer, lower material stream part of which is provided fixedly with a powder blowing device; the material flow outlet and the powder conveying blowpipe are provided fixedly with a powder conveying device. Applied to an asphalt concrete mixer, the utility model can significantly reduce installation power consumption of the pulverized coal combustion device for asphalt concrete mixer.

Description

Bituminous concrete mixer coal powder burner
Technical field
The utility model relates to a kind of bituminous concrete mixer coal powder burner, specifically, relates to the coal powder burner that a kind of preparation, conveying and combustion process to the mixed earth mixer fuel coal dust of pitch carried out improved bituminous concrete mixer.
Background technology
Present bituminous concrete mixer coal powder burner all is to adopt a kind of horizontal axis fan mill preparation and pulverized coal conveying, and coal dust is sent into the coal-powder boiler burning structures.For example: a kind of coal powder burner that Chenzhou three pavement construction machinery factories produce, see Fig. 1, the fuel pulverized coal preparation of above-mentioned coal powder burner, conveying device are the horizontal axis fan mill.The course of work of this coal powder burner is, short grained raw coal joins 11 li of coal feeding buckets, sent into by conveying worm 14 in the mill chamber of horizontal axis fan mill 23, and conveying worm 14 is driven through belt dressing 13, decelerator 12 by main shaft 3.Motor 1 drives coal pulverizer main shaft 3 rotation at a high speed through belt drive unit 2; three grades of tups 10 on the main shaft 3 smash into coal dust to the former coal particle that enters the mill thorax; coal dust is blown out at last, in powder feeding airduct 4 and fire door 5 are delivered to the burner hearth of coal dust furnace 8, burn by the fan blade 9 that is contained in rotation at a high speed on the main shaft 3.
The method of the horizontal axis fan mill comminuted coal particles that the described coal powder burner of prior art uses is three grades of tups, the 10 strike coal grains that rely on high speed to rotate, and utilizes tup plate hight speed rotation drive coal grain generation kinetic energy impact inboard wall of burner hearth liner plate to realize.Tup 10 outer rims must leave very big gap with mill thorax inwall, generally all are greater than 10 millimeters, thereby fineness of pulverized coal difference and frame for movement quick abrasion; Be installed in the wind that fan blade 9 on the main shaft 3 and coal pulverizer 23 shells form and send powder mechanism, because of its structure is limit, wind send efficient very low.
Summary of the invention
The purpose of this utility model provides a kind of bituminous concrete mixer coal powder burner, and described coal powder burner is used in bituminous concrete and mixes machine and last, makes the installed power consumption of bituminous concrete mixer coal powder burner reduce greatly.
To achieve these goals, a kind of bituminous concrete mixer coal powder burner described in the utility model has adopted following technical scheme and structural design.
A kind of coal powder burner of bituminous concrete mixer, comprise pulverized coal preparation, conveying device, the discharging opening of pulverized coal preparation, conveying device links to each other with the charging aperture of combustion furnace by the powder feeding airduct, it is characterized in that: described pulverized coal preparation, conveying device are the overhang roll grinding machine.
The coal powder burner of described a kind of bituminous concrete mixer is characterized in that: the stream downstream position of described overhang roll grinding machine is fixed with blows the powder device.
The coal powder burner of described a kind of bituminous concrete mixer is characterized in that: be fixed with dust feeder between the logistics outlet of described overhang roll grinding machine and the powder feeding airduct.
The coal powder burner of described a kind of bituminous concrete mixer is characterized in that: the stream downstream position of described overhang roll grinding machine is fixed with blows the powder device, is fixed with dust feeder between logistics outlet and the powder feeding airduct.
The coal powder burner of described a kind of bituminous concrete mixer is characterized in that: the described Blast mechanism that blows the powder device for band control air door.
Coal powder burner power consumption conventional in bituminous concrete mixer coal powder burner described in the utility model and the prior art descends 48~66%, and contrast sees the following form in detail:
Two class coal powder burner power configuration contrast tables (kw of unit)
Adapted bituminous concrete mixer model 1000 types 1500 types 2000 types 3000 types
The utility model coal powder burner 19.85 29.6 40.75 52.8
The various coal dust burning device of domestic routine 49.5 61.5 78.5 155
The conventional % that reduces of the utility model 60 51 48 66
The utility model coal powder burner adopts the Suspension roller grinding machine to prepare coal dust, and its operation principle is to rely on heavy grinding roller that material is ground in material bed repeated multiple times roll extrusion to be pressed into required fineness, realizes effective grinding.Be suspended on the grinding roller on the plum blossom frame,, do rotation around self axis again simultaneously, do relative motion facing to mill around vertical center axis revolution.Material places on the mill, thick material is nipped between grinding roller and the mill owing to friction, be subjected to the roll extrusion effect of grinding roller earlier and pulverize, then, the extruding of grinding roller is just passed on the coarse-grained material of time one-level, constantly continues like this, along with material is crushed, particle reconfigures, and the extruding of grinding roller and shear action are further pulverized less material particles.
For this Suspension roller grinding machine is applied on the utility model coal powder burner, following new technical measures have been adopted: in the bottom of Suspension roller grinding machine, independently be provided with one and blow the powder device, blowing the powder device is the Blast mechanism of a cover band control air door, its air blast in the mill chamber of overhang roll grinding machine utilizes wind-force that the coal dust that is crushed to required fineness in the mill chamber is kicked up; On the top of overhang roll grinding machine, a dust feeder independently is set, will directly be blown in the coal dust furnace by the coal dust sucking-off of kicking up after pulverizing and through the powder feeding airduct and burn; The mechanism that delivers coal of Suspension roller grinding machine, under coal bunker, designed a kind of conveying worm or rotary pocket feeder that drives by electromagnetic adjustable speed motor, rotating speed of motor can steplessly be adjusted, adjust the rotating speed of conveying worm or rotary pocket feeder easily according to the Coal-fired capacity of combustion furnace needs, control the coal input quantity of Suspension roller grinding machine, thereby control and reach the burning capacity of combustion furnace exactly.
The utility model coal powder burner directly is connected the meal outlet of overhang roll grinding machine with the coal dust burner of combustion furnace with the powder pipeline of delivering coal, shortened the length of pipeline, has reduced the resistance of pipeline.
Description of drawings
Fig. 1 is conventional asphaltic concrete mixer coal powder burner.
Fig. 2 is the coal powder burner of asphaltic concrete mixer of the present utility model.
The parts title of each label representative is as follows in the accompanying drawing:
1. motor 2. belt drive units 3. coal pulverizer main shafts 4. powder feeding airducts
5. the straight air channel of fire door 6. air blasts 7. burner hearths 8. combustion furnaces
9. coal pulverizer fan blade 10. coal pulverizer tups 11. coal feeding buckets 12. reductor of delivering coal
Mechanism's 16. overhang roll grinding machines 13. transmission device 14. feed screws 15. are delivered coal
17. dust feeder 18. air register A 19. air register B 20. inclination air channels
21. the powder device is blown in rotation air channel 22., center
The specific embodiment
A kind of bituminous concrete mixer coal powder burner that this specific embodiment is introduced as shown in Figure 2.Its structure comprises coal dust powder preparation facilities and two parts of coal powder burner.Fuel pulverizing plant is by the mechanism 15 that delivers coal, overhang roll grinding machine 16, dust feeder 17, powder feeding airduct 4 and blow powder device 22 and form.Coal powder burner is made up of fire door 5, air blast 6, combustion furnace 8, air register 18 and 19, burner hearth inclination air channel 20, rotation air channel 21, center etc.
Overhang roll grinding machine 16 major functions are that little granular or block raw coal is ground into superfine coal dust, deliver coal mechanism 15 is responsible for to overhang roll grinding machine 16 supply raw coal, it drives rotary pocket feeder or conveying worm by electromagnetic adjustable speed motor, former coal particle in the coal bunker is sent in the mill chamber of overhang roll grinding machine 16 and ground, rotating speed by changing electromagnetic adjustable speed motor can step-less adjustment be sent into the coal-grinding amount of overhang roll grinding machine, change the productivity ratio of overhang roll grinding machine, thereby regulate and control the burning capacity of combustion furnace.Blow the air blast that powder device 22 is air inlet band dampers, it is placed in the bottom of overhang roll grinding machine, toward the interior air blast of the mill chamber of overhang roll grinding machine, utilizes wind-force will grind the coal dust that grinds in the thorax and kicks up; Dust feeder 17 is an air blast, is placed in the top of overhang roll grinding machine, and its sucks the coal dust kicked up in mill chamber and burns in powder feeding airduct 4 is blown into coal dust in the burner hearth of combustion furnace 8.
The fire door 5 of combustion furnace 8 is connected with powder feeding airduct 4, the wind coal dust of fuel pulverizing plant output is sent in the combustion furnace 8 burnt.The end cap of fire door 5 is provided with rotation air channel 21, center, and burner hearth sidewall is provided with inclination air channel 20.An air blast 6 is housed on the combustion furnace 8, send combustion air to combustion furnace 8 drums, this strand combustion air divides two-way to enter the burner hearth of combustion furnace 8, one transportation work style is accelerated and enters strongly rotatably burner hearth after rotating air channel 21 by the center, another transportation work style enters burner hearth by the inclination air channel 20 of furnace wall, entrainment cyclone around inboard wall of burner hearth formation, this two-way combustion air is provided with air register 18A and 19B separately with the size of regulating air quantity and the intensity of wind-force, under their acting in conjunction, good aerodynamic field makes coal dust be able to abundant burning in combustion furnace.

Claims (5)

1. the coal powder burner of a bituminous concrete mixer, comprise pulverized coal preparation, conveying device, the discharging opening of pulverized coal preparation, conveying device links to each other by the charging aperture of powder feeding airduct 4 with combustion furnace 8, it is characterized in that: described pulverized coal preparation, conveying device are overhang roll grinding machine 16.
2. the coal powder burner of a kind of bituminous concrete mixer according to claim 1 is characterized in that: the stream downstream position of described overhang roll grinding machine 16 is fixed with blows powder device 22.
3. the coal powder burner of a kind of bituminous concrete mixer according to claim 1 is characterized in that: be fixed with dust feeder 17 between the logistics outlet of described overhang roll grinding machine 16 and the powder feeding airduct 4.
4. the coal powder burner of a kind of bituminous concrete mixer according to claim 1 is characterized in that: the stream downstream position of described overhang roll grinding machine 16 is fixed with blows powder device 22, is fixed with dust feeder 17 between logistics outlet and the powder feeding airduct 4.
5. according to the coal powder burner of claim 2 or 4 described a kind of bituminous concrete mixers, it is characterized in that: the described Blast mechanism that blows powder device 22 for band control air door.
CN 200620053114 2006-12-08 2006-12-08 Bituminous concrete mixer pulverized-coal burner Expired - Fee Related CN200989597Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200620053114 CN200989597Y (en) 2006-12-08 2006-12-08 Bituminous concrete mixer pulverized-coal burner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200620053114 CN200989597Y (en) 2006-12-08 2006-12-08 Bituminous concrete mixer pulverized-coal burner

Publications (1)

Publication Number Publication Date
CN200989597Y true CN200989597Y (en) 2007-12-12

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Application Number Title Priority Date Filing Date
CN 200620053114 Expired - Fee Related CN200989597Y (en) 2006-12-08 2006-12-08 Bituminous concrete mixer pulverized-coal burner

Country Status (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101929669A (en) * 2010-08-31 2010-12-29 西安交通大学 Vertical industrial pulverized coal boiler system
CN102788360A (en) * 2011-05-17 2012-11-21 合肥金锡机械有限公司 Automatic fuel supply device of hot blast heater

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101929669A (en) * 2010-08-31 2010-12-29 西安交通大学 Vertical industrial pulverized coal boiler system
CN101929669B (en) * 2010-08-31 2012-07-18 西安交通大学 Vertical industrial pulverized coal boiler system
CN102788360A (en) * 2011-05-17 2012-11-21 合肥金锡机械有限公司 Automatic fuel supply device of hot blast heater

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C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20071212

Termination date: 20100108