CN2771656Y - Coal-powder burning apparatus - Google Patents

Coal-powder burning apparatus Download PDF

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Publication number
CN2771656Y
CN2771656Y CN 200520002172 CN200520002172U CN2771656Y CN 2771656 Y CN2771656 Y CN 2771656Y CN 200520002172 CN200520002172 CN 200520002172 CN 200520002172 U CN200520002172 U CN 200520002172U CN 2771656 Y CN2771656 Y CN 2771656Y
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CN
China
Prior art keywords
secondary air
air channel
air pipe
reamer
airduct
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 - Lifetime
Application number
CN 200520002172
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Chinese (zh)
Inventor
王纬
王昕�
何海军
纪任山
王乃继
高明山
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.)
China Coal Research Institute CCRI
Original Assignee
BEIJING COAL-CHEMICAL BRANCH OF COAL-SCIENCE GENERAL ACADEMY
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Priority to CN 200520002172 priority Critical patent/CN2771656Y/en
Application granted granted Critical
Publication of CN2771656Y publication Critical patent/CN2771656Y/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model relates to a coal powder burning apparatus which is characterized in that the utility model comprises a center air pipe, a primary air pipe, an internal secondary air pipe and an external secondary air pipe, which are sheathed sequentially from the inside to the outside, wherein the external surface in the center air pipe is provided with an oil pump; an oil pipe connected with the oil pump is arranged in the center air pipe; the outlet end of the center air pipe is provided with a countersinker; an outlet near the oil pipe is provided with an ignition electrode in the countersinker; the inlet ends of the primary air pipe, the internal secondary air pipe and the external secondary air pipe are respectively provided with an air inlet; the outlet ends of the primary air pipe, the internal secondary air pipe and the external secondary air pipe are countersinkers which are elongated from the inside to the outside sequentially; the countersinker of the primary air pipe is shorter than that of the center pipe. The utility model has the characteristics of air classification supply, air rotating intake, stable combustion and the adjustability of the burning position of flames, and the utility model can be applied widely to various industrial pulverized coal fired boilers.

Description

A kind of coal powder burner
Technical field
The utility model relates to a kind of burner, particularly about a kind of coal powder burner that is suitable for using in small and medium-sized industrial coal powder boilers.
Background technology
Existing middle-size and small-size industry coal-boiler is as grate firing boiler, back and forth all adopt traditional burner boiler, the chain-grate boiler etc., and these all are not suitable for the combusting coal fines boiler and use as burner.The coal powder burner that is used for station boiler at present, its volume structure only are applicable to that generally the huge station boiler of burner hearth uses, and can not be directly used in small and medium-sized industrial coal powder boilers.And the burner of existing oil-burning gas-fired boiler can not be directly used in the small and medium-sized industrial coal powder boilers owing to the fuel difference of carrying.Therefore, it is very necessary to develop the coal powder burner that a kind of suitable small and medium-sized industrial coal powder boilers uses.
Summary of the invention
At the problems referred to above, main purpose of the present utility model is to provide a kind of coal powder burner of suitable small and medium-sized industrial coal powder boilers use.
For achieving the above object, the utility model is taked following technical scheme: a kind of coal powder burner is characterized in that: it comprises sheathed successively from inside to outside central air hose, airduct, interior secondary air channel and an outer secondary air channel; Outside in the described central air hose is provided with an oil pump, and the oil pipe of the described oil pump of a connection is set in the described central air hose, and the port of export of described central air hose is provided with a reamer, some thermoelectricity utmost points of outlet setting of close described oil pipe in the described reamer; The entrance point of a described airduct, interior secondary air channel, outer secondary air channel is respectively arranged with an air inlet; The port of export of a described airduct, interior secondary air channel, outer secondary air channel is a reamer that extends successively from inside to outside, and the reamer of a described airduct is shorter than the reamer of described central tube.
A described airduct, interior secondary air channel are respectively arranged with vane with the intersection of outer secondary air channel and each described reamer.
The air inlet of a described airduct, interior secondary air channel and outer secondary air channel respectively along the tube wall tangential tilt be connected a described airduct, interior secondary air channel and outside on the secondary air channel.
Reamer length on the described outer secondary air channel is 1~2 times of outer secondary air channel diameter.
The cone angle of each described reamer is 60 °~70 °.
The utility model is owing to adopt technique scheme, it has the following advantages: 1, the utility model since central air hose circumferentially be provided with airduct, interior secondary air channel and outside secondary air channel, and air inlet radially is set at above-mentioned airduct, therefore once after coal dust lighted, the wind that secondary air channel enters outside airduct, an interior secondary air channel reach, the oxygen of aftercombustion needs makes the burning of coal dust more abundant well.2, the utility model is with an airduct, the air port of interior secondary air channel and outer secondary air channel is obliquely installed along the tangential direction of tube wall, air intake is screwed in along the tangential direction of airduct, and in each airduct, rotate and advance, particularly at an airduct, the intersection of interior secondary air channel and outer secondary air channel and reamer is provided with vane, therefore can further change the swirling flow angle of wind direction by the angle of vane, when making burner realize that air classification is supplied with, burned flame is formed revolve flame, and then the length that can elongate flame combustion effectively, make burning more abundant, more stable, form the combustion efficiency of similar oil-burning gas-fired boiler burner.3, structure of the present utility model makes that the ignition temperature field distribution of flame in inside of boiler is even, the phenomenon of hot-spot can not occur, for coal dust firing desulfurization and low nitrogen burning have been created condition.4, the utlity model has the combustion efficiency of fuel-firing gas-firing device, and firepower is more powerful, operating cost is but quite cheap, and the utility model can be widely used in the various small and medium-sized industrial coal powder boilers.
Description of drawings
Fig. 1 is a structural representation of the present utility model
Fig. 2 is airduct schematic cross-section of the utility model
Fig. 3 is a secondary air channel schematic cross-section in the utility model
Fig. 4 is the outer secondary air channel schematic cross-section of the utility model
The specific embodiment
In order to describe structure of the present utility model and characteristics in detail, be elaborated according to preferred embodiment of the present utility model and conjunction with figs. below.
As shown in Figure 1, the utility model comprises sheathed successively from inside to outside central air hose 1, airduct 2, interior secondary air channel 3 and an outer secondary air channel 4.Central air hose 1 entrance point outer wall is provided with an oil pump 5, and the oil pipe 6 of a connection oil pump 5 is set in the central air hose 5, and the port of export of central air hose 1 is provided with a reamer 7, some thermoelectricity utmost points 8 of jet setting of close oil pipes 5 in the reamer 7.The entrance point of airduct 2, interior secondary air channel 3 and an outer secondary air channel 4 radially is respectively arranged with primary air nozzle 9, interior overfiren air port 10 and outer overfiren air port 11, the reamer that is shorter in length than central air hose 17 of the reamer 12 of one 12,13,14, the airducts 2 of reamer that extend successively from inside to outside is set at the port of export of each airduct 2,3,4.
In the foregoing description, (as Fig. 2, Fig. 3, shown in Figure 4) that tangential tilt inserts each airduct 2,3,4 prolonged in each air port the 9,10, the 11st, can make like this wind that enters each air port 9,10,11 along separately airduct 2,3,4 in the shape of a spiral shape advance.Particularly a circle vane 15,16,17 is set respectively, can further strengthens the rotate effect of air-out at the port of export in each air port 2,3,4 and the junction of reamer 12,13,14.Vane the 15,16, the 17th is made up of the guide plate that has the swirling flow angle, and quantity is set for it and the swirling flow angle can be provided with according to demand.The flame that enters boiler fire tube is formed revolve flame, and elongate the length of revolving flame effectively, make burning more fully, evenly.
In the various embodiments described above, reamer 11 length on the outer secondary air channel 4 are 1~2 times of outer secondary air channel 4 diameters.
When the utility model is installed, central air hose 1 is connected a blower fan (not shown), interior secondary air channel 3 is connected pressure air or blower fan (not shown) respectively with outer secondary air channel 4, one time airduct 2 connects the coal dust carrier pipe (not shown) with air pressure, each reamer 7,12,13,14 of the present utility model is inserted together and is connected on the fire tube of horizontal industrial pulverized-coal fired boiler device.
When the utility model uses, at first start oil pump 5, the atomizer of fuel oil by oil pipe 6 sprayed, and light by ignitor 8.Fuel oil was lighted after 10 seconds, open primary air nozzle 9, under the drive of air pressure, coal dust is entered by an airduct 2, spray at reamer 12 places, and the fuel oil that has been burnt is lighted, open central air hose 1, interior overfiren air port 10 and outer overfiren air port 11 simultaneously, at this moment, wind and in secondary wind and outer secondary air separating not outside airduct 2, an interior secondary air channel 3 reach secondary air channel 4 rotate into reamer 12,13,14 places, reach air classification and supply with, increase the oxygen-supplying amount at reamer 12,13,14 places gradually, promote coal dust firing.Coal dust lighted and with fuel oil cofiring after 10 seconds, close oil pump, cut off fuel oil, fully by coal dust firing.Can change the air quantity ratio in wind, interior secondary wind, outer secondary wind and the central air hose 1 in the process of coal combustion one time, also can change the burning position of flame in the coal powder boiler fire tube, make the position of flame combustion fully adjustable.The flame of coal dust firing can spray into the flame rotation depths of boiler fire tube (not shown) under the promotion of a wind that rotates into, interior secondary wind, outer secondary wind and central air hose 1 air intake, reach the purpose of rotation, steady combustion.

Claims (7)

1, a kind of coal powder burner is characterized in that: it comprises sheathed successively from inside to outside central air hose, airduct, interior secondary air channel and an outer secondary air channel; Outside in the described central air hose is provided with an oil pump, and the oil pipe of the described oil pump of a connection is set in the described central air hose, and the port of export of described central air hose is provided with a reamer, some thermoelectricity utmost points of outlet setting of close described oil pipe in the described reamer; The entrance point of a described airduct, interior secondary air channel, outer secondary air channel is respectively arranged with an air inlet; The port of export of a described airduct, interior secondary air channel, outer secondary air channel is a reamer that extends successively from inside to outside, and the reamer of a described airduct is shorter than the reamer of described central tube.
2, a kind of coal powder burner as claimed in claim 1 is characterized in that: a described airduct, interior secondary air channel are respectively arranged with vane with the intersection of outer secondary air channel and each described reamer.
3, a kind of coal powder burner as claimed in claim 1 is characterized in that: the air inlet of a described airduct, interior secondary air channel and outer secondary air channel respectively along the tube wall tangential tilt be connected a described airduct, interior secondary air channel and outside on the secondary air channel.
4, a kind of coal powder burner as claimed in claim 2 is characterized in that: the air inlet of a described airduct, interior secondary air channel and outer secondary air channel respectively along the tube wall tangential tilt be connected a described airduct, interior secondary air channel and outside on the secondary air channel.
5, as claim 1 or 2 or 3 or 4 described a kind of coal powder burners, it is characterized in that: the reamer length on the described outer secondary air channel is 1~2 times of outer secondary air channel diameter.
6, as claim 1 or 2 or 3 or 4 described a kind of coal powder burners, it is characterized in that: the cone angle of each described reamer is 60 °~70 °.
7, a kind of coal powder burner as claimed in claim 5 is characterized in that: the cone angle of each described reamer is 60 °~70 °.
CN 200520002172 2005-02-07 2005-02-07 Coal-powder burning apparatus Expired - Lifetime CN2771656Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200520002172 CN2771656Y (en) 2005-02-07 2005-02-07 Coal-powder burning apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200520002172 CN2771656Y (en) 2005-02-07 2005-02-07 Coal-powder burning apparatus

Publications (1)

Publication Number Publication Date
CN2771656Y true CN2771656Y (en) 2006-04-12

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CN 200520002172 Expired - Lifetime CN2771656Y (en) 2005-02-07 2005-02-07 Coal-powder burning apparatus

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CN (1) CN2771656Y (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101846313A (en) * 2010-06-13 2010-09-29 山西蓝天环保设备有限公司 Coal dust industrial boiler having prechamber and taking high-quality coal dust as auxiliary fuel
CN101949542A (en) * 2010-04-14 2011-01-19 华中科技大学 Three-layered secondary air low nitrogen oxide swirl burner
CN101644431B (en) * 2009-08-31 2011-02-02 中国计量学院 Self-stabilizing three-stage air-distribution low-NOx pulverized coal burner
CN102102874A (en) * 2010-06-13 2011-06-22 无锡凯力通装备科技有限公司 Furnace door structure of powder burner
CN103256590A (en) * 2013-05-20 2013-08-21 北京科技大学 Method and device for multi-grade mixed combustion of double fuels at cyclone state
CN105276605A (en) * 2014-07-04 2016-01-27 烟台龙源电力技术股份有限公司 Coal-fired boiler and combustion method thereof
CN111947141A (en) * 2020-08-13 2020-11-17 西安交通大学 Adjustable wind-coal step-by-step mixing low NOx combustion device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101644431B (en) * 2009-08-31 2011-02-02 中国计量学院 Self-stabilizing three-stage air-distribution low-NOx pulverized coal burner
CN101949542A (en) * 2010-04-14 2011-01-19 华中科技大学 Three-layered secondary air low nitrogen oxide swirl burner
CN101846313A (en) * 2010-06-13 2010-09-29 山西蓝天环保设备有限公司 Coal dust industrial boiler having prechamber and taking high-quality coal dust as auxiliary fuel
CN102102874A (en) * 2010-06-13 2011-06-22 无锡凯力通装备科技有限公司 Furnace door structure of powder burner
CN103256590A (en) * 2013-05-20 2013-08-21 北京科技大学 Method and device for multi-grade mixed combustion of double fuels at cyclone state
CN103256590B (en) * 2013-05-20 2015-07-15 北京科技大学 Method and device for multi-grade mixed combustion of double fuels at cyclone state
CN105276605A (en) * 2014-07-04 2016-01-27 烟台龙源电力技术股份有限公司 Coal-fired boiler and combustion method thereof
CN111947141A (en) * 2020-08-13 2020-11-17 西安交通大学 Adjustable wind-coal step-by-step mixing low NOx combustion device

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Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
ASS Succession or assignment of patent right

Owner name: CHINA COAL RESEARCH INSTITUTE CO., LTD.

Free format text: FORMER OWNER: BEIJING COAL-CHEMICAL BRANCH OF COAL-SCIENCE GENERAL ACADEMY

Effective date: 20140827

C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20140827

Address after: 100013 Chaoyang District, Hepingli Youth Ditch Road, No. 5, No.

Patentee after: Co., Ltd of coal science and technology academy

Address before: 100013 Chaoyang District, Hepingli Youth Ditch Road, No. 5, No.

Patentee before: Beijing Coal-Chemical Branch of Coal-Science General Academy

C17 Cessation of patent right
CX01 Expiry of patent term

Expiration termination date: 20150207

Granted publication date: 20060412