CN101576255A - Pulverized coal burner - Google Patents

Pulverized coal burner Download PDF

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Publication number
CN101576255A
CN101576255A CNA2009100871618A CN200910087161A CN101576255A CN 101576255 A CN101576255 A CN 101576255A CN A2009100871618 A CNA2009100871618 A CN A2009100871618A CN 200910087161 A CN200910087161 A CN 200910087161A CN 101576255 A CN101576255 A CN 101576255A
Authority
CN
China
Prior art keywords
bellows
powder feeding
feeding pipe
air box
pipe
Prior art date
Application number
CNA2009100871618A
Other languages
Chinese (zh)
Inventor
王乃继
纪任山
冀飞
周建明
何海军
范玮
肖翠微
张帆
Original Assignee
煤炭科学研究总院
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 煤炭科学研究总院 filed Critical 煤炭科学研究总院
Priority to CNA2009100871618A priority Critical patent/CN101576255A/en
Publication of CN101576255A publication Critical patent/CN101576255A/en

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Abstract

The invention relates to a pulverized coal burner which is characterized by comprising an air box, a powder feeding pipe, an ignition device and a blast pipe; a cylindrical fixed baffle plate with a conical cross section is axially arranged in the air box, an annular gap is left between one end of the fixed baffle plate and the air box, and a plurality of swirl vanes are circumferentially arranged in the annular gap; a precombustion chamber is arranged inside the fixed baffle plate; the outlet end of the powder feeding pipe penetrates the center of the air box to enter in the precombustion chamber, the inlet end of the powder feeding pipe is arranged outside the air box and connected with a feeder device, and the powder feeding pipe is fixedly connected with the air box; a return flow cap is arranged at the tail end of the outlet end of the powder feeding pipe and a special gap is left between the return flow cap and the outlet end of the powder feeding pipe; the ignition device comprises a fuel tank, a conduct pipe and an ignition electrode, wherein the fuel tank is arranged outside the air box; one end of the conduct pipe is connected with the fuel tank and the other end of the conduct pipe penetrates the air box to enter in the precombustion chamber to form a spouting vent; the ignition electrode is arranged at one side adjacent to the spouting vent; and one end of the blast pipe is connected with the air box and the other end of the blast pipe is connected with an air blower. The invention can be widely used in various small and medium-sized industrial coal powder boilers.

Description

A kind of coal burner

Technical field

The present invention relates to a kind of burner, particularly the coal burner that uses about a kind of suitable small and medium-sized industrial coal powder boilers.

Background technology

At present, existing small and medium-sized industrial coal powder boilers such as grate firing boiler, reciprocal boiler and chain-grate boiler etc. generally all adopt traditional burner, and these burners are to use the fuel that lump coal is the master, all are not suitable for combusting coal fines and use.The coal burner that is used for station boiler at present, its volume structure generally only are suitable for the huge station boiler of burner hearth and use, and can not be directly used in small and medium-sized industrial coal powder boilers.And the existing burner that is used for 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 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, the purpose of this invention is to provide the coal burner that a kind of suitable small and medium-sized industrial coal powder boilers is used.

For achieving the above object, the present invention takes following technical scheme: a kind of coal burner is characterized in that: it comprises bellows, powder feeding pipe, igniter and blast pipe; Described bellows inner shaft leaves the annular gap to being provided with the tapered tubular fixed dam in a cross section between described fixed dam one end and the described bellows, circumferentially is provided with some swirl vanes in the described annular gap; Described fixed dam inside has a precombustion chamber; The port of export of described powder feeding pipe runs through described bellows center and enters described precombustion chamber, and it is outer and connect charging gear that its entrance point is arranged on described bellows, and described powder feeding pipe and described bellows are for fixedlying connected; The end of the described powder feeding pipe port of export is provided with a backflow cap, and described backflow cap and the described powder feeding pipe port of export keep specific gap; Described igniter comprises a fuel tank, a conduit and some thermoelectricity utmost points, and described fuel tank is arranged on outside the described bellows; Described conduit one end connects described fuel tank, and the other end runs through described bellows and enters described precombustion chamber and form spout; Described ignitor is arranged near described spout one side; One end of described blast pipe connects described bellows, and the other end connects air blast.

Described bellows around the described powder feeding pipe entrance point are provided with a regulating handle with gear drive, and described swirl vane is connected with gear drive on the described regulating handle.

Described bellows around the described powder feeding pipe entrance point be provided with one can the field observation combustion position peephole.

Described bellows around the described powder feeding pipe entrance point be provided with one can the remote observation combustion position camera.

The profile of described swirl vane is the irregular curved surface that is stamped to form by particular manufacturing craft.

The present invention is owing to take above technical scheme, it has the following advantages: 1, the present invention is owing to the end at the powder feeding pipe port of export is provided with the backflow cap, the coal dust that can make powder feeding pipe carry evenly disperses in precombustion chamber after the reflection of backflow cap, the wind that cooperates blast pipe to send into, the oxygen that can well aftercombustion needs makes the burning of coal dust more abundant.2, the swirl vane of particular curve profile is equipped with in the present invention in bellows, and the wind that can make air blast send into produces very strong cyclonic action, makes burned flame form and revolves flame.Particularly swirl vane is linked to each other with gear drive, can be good at controlling the inclination angle of swirl vane by the rotation regulating handle, thereby better control blasts the axial velocity and the tangential velocity of wind, and then can elongate flame burning length effectively, make burning more abundant, more stable, form the combustion efficiency of similar oil-burning gas-fired boiler device.3, the invention enables the ignition temperature field distribution of flame in inside of boiler even, the phenomenon of hot-spot can not occur, for coal dust firing desulfurization and low nitrogen burning have been created condition.4, the present invention has the combustion efficiency of fuel-firing gas-firing device, and firepower is more powerful, and operating cost is but quite cheap.The present invention can extensive use and various small and medium-sized industrial coal powder boilers in.

Description of drawings

Fig. 1 is an overall structure schematic diagram of the present invention

Fig. 2 is a bellows schematic cross-section of the present invention

The specific embodiment

Below in conjunction with drawings and Examples the present invention is described in detail.

As shown in Figure 1, the present invention includes bellows 1, powder feeding pipe 2, igniter 3 and blast pipe 4.Bellows 1 inner shaft leaves annular gap 6 to being provided with the tapered tubular fixed dam 5 in a cross section between fixed dam 5 one ends and the bellows 1, circumferentially is provided with some swirl vanes 7 in the annular gap 6.Fixed dam 5 inside have a precombustion chamber 8.

The port of export 21 of powder feeding pipe 2 runs through bellows 1 center and enters precombustion chamber 8, and entrance point 22 is arranged on outside the bellows 1, and powder feeding pipe 2 and bellows 1 are for fixedlying connected.The end of the port of export 21 is provided with a backflow cap 9, and backflow cap 9 keeps specific gap with the port of export 22.。

Igniter 3 comprises a fuel tank 31, a conduit 32 and some thermoelectricity utmost points 33, and fuel tank 31 is arranged on outside the bellows 1, arranges according to field condition and installs.Conduit 32 1 ends connect fuel tank 31, and the other end runs through bellows 1 and enters precombustion chamber 8 and form spout 34.Ignitor 33 is arranged near spout 34 1 sides.Can be liquefied gas or oil in the fuel tank 31, also can be both the acting in conjunction igniting of liquefaction G﹠O when practical application, promptly puts fuel oil with liquefied gas, uses the coal-fired powder of oil drop again.

One end of blast pipe 4 connects bellows 1, and the other end connects air blast.Also be respectively arranged with a peephole 10, a camera 11 and on the bellows around the entrance point 22 of powder feeding pipe 2 and have the regulating handle 12 of gear drive.

As shown in Figure 2, the profile of swirl vane 7 is the irregular curved surfaces that are stamped to form by particular manufacturing craft, and the quantity of its setting and eddy flow angle are are all researched and developed according to aerodynamic principle.Swirl vane 7 is connected with gear drive on the regulating handle 12, and the therefore eddy flow angle that can regulate swirl vanes 7 by regulating handle 12, thereby the effective control length and the intensity of revolving flame make burning more fully, evenly.

The present invention is connected by entrance point 22 powder feeding pipe 2 when mounted with charging gear, blast pipe 4 directly connects air blast, then whole burner is docked with boiler.Because charging gear and air blast are not protection scope of the present invention, so repeat no more.

The operation principle of present embodiment is: carry wind to carry coal dust and import ajutage 2 under certain blast, through entering precombustion chamber 8 after 9 reflections of backflow cap.Simultaneously, powerful air blast imports bellows 1 with wind by blast pipe 4, enters precombustion chamber 8 through swirl vane 7, with ajutage 2 import precombustion chambers 8 coal dust and air interact, form the unique cyclone flow field.Coal dust and air ignite through igniter 3, form to revolve the flame burning in precombustion chamber 8, and the curve of arrow has been represented the flow direction (as shown in Figure 1) of wind and powder.Can the field observation combustion position by peephole 10, can the remote observation combustion position by camera 11.

The present invention in use, at first treat boiler water, wind system start finish after, starting ignition electrode 33, the starting fluid jar 31 afterwards, and fuel oil or liquefied gas by conduit 32 ejections, and are lighted by ignitor 33.After fuel is lighted, open feeding device and supply powder, wind and powder are sent into precombustion chamber 8 by powder feeding pipe 2, and lighted by burnt fuel.Air blast is sent into bellows 1 with wind by blast pipe 4 simultaneously, and imports precombustion chamber 8 through guide vane 7, provides coal dust firing required oxygen.Coal dust lighted and with fuel oil cofiring certain intervals after, close fuel tank 31, independently burn by coal dust fully.In process of coal combustion, can change the powder-feeding amount of feeding device, the air output of air blast and the parameters such as eddy flow angle of swirl vane 7, thereby change burning position, combustion intensity and the swirl strength etc. of flame in precombustion chamber 8, make coal dust in precombustion chamber 8, be able to reasonably tissue burning, reach the purpose of steady combustion.

The present invention only describes with the foregoing description; the structure of each parts, the position is set and connects and all can change to some extent; on the basis of technical solution of the present invention; all improvement and equivalents of individual component being carried out according to the principle of the invention all should not got rid of outside protection scope of the present invention.

Claims (7)

1, a kind of coal burner is characterized in that: it comprises bellows, powder feeding pipe, igniter and blast pipe; Described bellows inner shaft leaves the annular gap to being provided with the tapered tubular fixed dam in a cross section between described fixed dam one end and the described bellows, circumferentially is provided with some swirl vanes in the described annular gap; Described fixed dam inside has a precombustion chamber;
The port of export of described powder feeding pipe runs through described bellows center and enters described precombustion chamber, and it is outer and connect charging gear that its entrance point is arranged on described bellows, and described powder feeding pipe and described bellows are for fixedlying connected; The end of the described powder feeding pipe port of export is provided with a backflow cap, and described backflow cap and the described powder feeding pipe port of export keep specific gap;
Described igniter comprises a fuel tank, a conduit and some thermoelectricity utmost points, and described fuel tank is arranged on outside the described bellows; Described conduit one end connects described fuel tank, and the other end runs through described bellows and enters described precombustion chamber and form spout; Described ignitor is arranged near described spout one side;
One end of described blast pipe connects described bellows, and the other end connects air blast.
2, a kind of coal burner as claimed in claim 1, it is characterized in that: the described bellows around the described powder feeding pipe entrance point are provided with a regulating handle with gear drive, and described swirl vane is connected with gear drive on the described regulating handle.
3, a kind of coal burner as claimed in claim 1 is characterized in that: the described bellows around the described powder feeding pipe entrance point be provided with one can the field observation combustion position peephole.
4, a kind of coal burner as claimed in claim 2 is characterized in that: the described bellows around the described powder feeding pipe entrance point be provided with one can the field observation combustion position peephole.
5, as claim 1 or 2 or 3 or 4 described a kind of coal burners, it is characterized in that: the described bellows around the described powder feeding pipe entrance point be provided with one can the remote observation combustion position camera.
6, as claim 1 or 2 or 3 or 4 described a kind of coal burners, it is characterized in that: the profile of described swirl vane is the irregular curved surface that is stamped to form by particular manufacturing craft.
7, a kind of coal burner as claimed in claim 5 is characterized in that: the profile of described swirl vane is the irregular curved surface that is stamped to form by particular manufacturing craft.
CNA2009100871618A 2009-06-10 2009-06-10 Pulverized coal burner CN101576255A (en)

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CNA2009100871618A CN101576255A (en) 2009-06-10 2009-06-10 Pulverized coal burner

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CN101576255A true CN101576255A (en) 2009-11-11

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102607018A (en) * 2012-03-02 2012-07-25 中国计量学院 Graded air-feed dual-swirled pulverized coal industrial furnace combustor
CN102705823A (en) * 2012-05-16 2012-10-03 神华集团有限责任公司 Pulverized coal burner
CN102944014A (en) * 2012-10-22 2013-02-27 瑞焓能源科技有限公司 Industrial boiler burner and industrial boiler with same
CN103123113A (en) * 2013-01-24 2013-05-29 孙公钢 Double-rotational-flow industrial boiler pulverized coal burner with back-blowing device
CN103471108A (en) * 2013-07-22 2013-12-25 北京航天动力研究所 Nitrous oxide (N2O) burner
CN103697469A (en) * 2013-11-20 2014-04-02 西安交通大学 Pulverized coal flame preheating low NOx burner system
CN103791494A (en) * 2014-01-22 2014-05-14 煤炭科学研究总院 Air-cooled pulverized coal low-nitrogen combustor and application method thereof
CN104764852A (en) * 2015-03-27 2015-07-08 辽宁科技大学 Visual detection method of pulverized coal combustion ratio
CN105042585A (en) * 2015-09-01 2015-11-11 山东华臻重工有限公司 Pulverized coal burner
CN105841147A (en) * 2016-06-04 2016-08-10 重庆市富燃科技有限责任公司 Oxygen-enriched coal powder backflow premix burner
CN104406187B (en) * 2014-11-05 2016-08-24 衢州昀睿工业设计有限公司 A kind of charging gear of coal burner
WO2016179822A1 (en) * 2015-05-14 2016-11-17 Zheng Shi A system for burning pulverized solid fuel and a method thereof
CN106352331A (en) * 2016-08-25 2017-01-25 施政 Pulverized coal combustion system
CN107620978A (en) * 2016-07-14 2018-01-23 施政 A kind of ignition system of large coal powder boiler

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102607018B (en) * 2012-03-02 2014-04-16 中国计量学院 Graded air-feed dual-swirled pulverized coal industrial furnace combustor
CN102607018A (en) * 2012-03-02 2012-07-25 中国计量学院 Graded air-feed dual-swirled pulverized coal industrial furnace combustor
CN102705823A (en) * 2012-05-16 2012-10-03 神华集团有限责任公司 Pulverized coal burner
CN102705823B (en) * 2012-05-16 2015-07-15 神华集团有限责任公司 Pulverized coal burner
CN102944014A (en) * 2012-10-22 2013-02-27 瑞焓能源科技有限公司 Industrial boiler burner and industrial boiler with same
CN103123113A (en) * 2013-01-24 2013-05-29 孙公钢 Double-rotational-flow industrial boiler pulverized coal burner with back-blowing device
CN103471108B (en) * 2013-07-22 2016-08-31 北京航天动力研究所 Laughing gas burner
CN103471108A (en) * 2013-07-22 2013-12-25 北京航天动力研究所 Nitrous oxide (N2O) burner
CN103697469B (en) * 2013-11-20 2015-10-28 西安交通大学 The low NO of a kind of pulverized coal flame preheating xbuner system
CN103697469A (en) * 2013-11-20 2014-04-02 西安交通大学 Pulverized coal flame preheating low NOx burner system
CN103791494A (en) * 2014-01-22 2014-05-14 煤炭科学研究总院 Air-cooled pulverized coal low-nitrogen combustor and application method thereof
CN104406187B (en) * 2014-11-05 2016-08-24 衢州昀睿工业设计有限公司 A kind of charging gear of coal burner
CN104764852A (en) * 2015-03-27 2015-07-08 辽宁科技大学 Visual detection method of pulverized coal combustion ratio
WO2016179822A1 (en) * 2015-05-14 2016-11-17 Zheng Shi A system for burning pulverized solid fuel and a method thereof
CN105042585A (en) * 2015-09-01 2015-11-11 山东华臻重工有限公司 Pulverized coal burner
CN105042585B (en) * 2015-09-01 2017-07-04 山东富海泰来新能源科技有限公司 Coal burner
CN105841147A (en) * 2016-06-04 2016-08-10 重庆市富燃科技有限责任公司 Oxygen-enriched coal powder backflow premix burner
CN107620978A (en) * 2016-07-14 2018-01-23 施政 A kind of ignition system of large coal powder boiler
CN106352331A (en) * 2016-08-25 2017-01-25 施政 Pulverized coal combustion system

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