CN2869593Y - Staged-combustion cyclone coal-powder combustor - Google Patents

Staged-combustion cyclone coal-powder combustor Download PDF

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Publication number
CN2869593Y
CN2869593Y CN 200620100978 CN200620100978U CN2869593Y CN 2869593 Y CN2869593 Y CN 2869593Y CN 200620100978 CN200620100978 CN 200620100978 CN 200620100978 U CN200620100978 U CN 200620100978U CN 2869593 Y CN2869593 Y CN 2869593Y
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CN
China
Prior art keywords
enlarging
coal dust
diameter
clasfficiator
guide shell
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Application number
CN 200620100978
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Chinese (zh)
Inventor
林正春
李月华
代茂林
卢斗
屈昌文
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东方日立锅炉有限公司
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Priority to CN 200620100978 priority Critical patent/CN2869593Y/en
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Publication of CN2869593Y publication Critical patent/CN2869593Y/en

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Abstract

The utility model discloses a graded burning turbine coal powder burner containing a one time wind bending pipe, an igniter, a flowing guiding pipe with an expanding port, a double tap expanding port, a coal powder grader, a one time wind distributing cylinder, an inner one time wind passage, and an outer one time wind passage. The flowing guiding pipe expanding port is located at the wind inlet of the one time wind bending pipe, the expanding port of the coal powder grader is backwards the fire side, the minimum inner diameter of the double tap expanding port is bigger than the maximum diameter of the coal powder grader expanding port, the diameter of the one time wind distributing cylinder is equal to or less than the minimum diameter of the coal powder grader. A plurality of the coal powder graders may be located on the one time wind bending pipe along the axis (K) of the pipe, the diameter of the coal powder graders is reduced gradually towards the fire side, that means the maximum diameter of the next one grader expanding port is equal to or less than the minimum diameter of the former one grader. The utility model is a powerful, low NOx emission, turbine coal powder burning device with the functions of fuel saving and the sintering prevention.

Description

The fractional combustion vortex burner

Technical field

The utility model relates to a kind of burner, and especially relating to a kind of is the burner of fuel with the coal dust.

Background technology

Nitrogen oxide (Nox) is the major pollutants that cause atmosphere pollution, and it destroys ecological environment except forming acid rain, can also form photochemical fog, is detrimental to health.By new GB 13223-2003 " thermal power plant's atmosphere pollutants emission standards ", require coal-burning boiler from January 1st, 2004, need satisfy Vdaf>20%, its Nox<450mg/Nm3,10%<Vdaf<20%, its Nox<650mg/Nm3, Vdaf<10%, its Nox<1100mg/Nm3; And under concentration of emission prerequisite up to standard, to charge,, have tangible economic advantages for the operating cost that alleviates denitrification apparatus so reduce the Nox amount that produces when burning as far as possible to the Nox total emission volumn.

In power station equipment, the quadrangle tangential circle boiler is because the cigarette temperature deviation that its residual rotation produces has caused the temperature deviation, therefore along with station boiler develops to big capacity, high parameter, high efficiency direction, adopt the swirl flow combustion technology of swirl flow combustion to obtain market approval widely.But traditional turbulent burner has following drawback: its wind, secondary wind mix strong, cause temperature peak higher, make the Nox output big; And near coking water-cooling wall easily, bring harm to safe operation of the boiler; Primary air system does not carry out fractional combustion, so when its igniting and underload, need to consume a large amount of fuel oils.Therefore, research Nox discharging is low, and the low-load combustion-stabilizing ability is strong, and is can fuel-efficient swirl flow combustion technology during igniting great to realizing the harmonious development of China's economy, create to save the property social effect.

Summary of the invention

The utility model mainly is to solve the high technical problem of existing in prior technology burner Nox discharging.

The utility model also solves the indifferent and igniting of existing in prior technology burner underload simultaneously, the technical problem of the big and easy coking of boiler water wall of fuel consumption etc. when surely firing.

Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals: comprise windbend pipe 1 one time, be positioned at the igniter 3 at windbend pipe 1 a straight section part center, the mozzle 12 that also comprises the band enlarging that the radian that is positioned at described windbend pipe 1 a sweep center and described windbend pipe 1 sweep adapt, be positioned at the biconial enlarging 2 behind the described mozzle 12, be positioned at the coal dust clasfficiator 15 of the band enlarging after the described biconial enlarging 2, be arranged at a wind shunting tube 6 behind the described coal dust clasfficiator 15, interior wind passage 14, an outer wind passage 13, the enlarging of described mozzle 12 is positioned at the air inlet of a described windbend pipe 1, the fiery dorsad side of the enlarging of described coal dust clasfficiator 15, the minimum place of the internal diameter of described biconial enlarging 2 is greater than the enlarging diameter maximum of described coal dust clasfficiator 15, and the diameter of described wind shunting tube 6 is equal to or less than the minimum place of diameter of described coal dust clasfficiator 15.

As preferably, in a windbend pipe 1, be provided with a plurality of coal dust clasfficiators 15 along center line K, a plurality of coal dust clasfficiators 15 reduce successively towards fiery side direction diameter, and the diameter of the enlarging maximum of a back coal dust clasfficiator 15 is equal to or less than the minimum place of diameter of previous coal dust clasfficiator 15.

As preferably, secondary air duct 10 and outer secondary air duct 17 in the outside of a windbend pipe 1 has, before being divided into by the dividing plates 18 of tubular in the described outer secondary air duct 17 secondary air duct 9 with after secondary air duct 11.

As preferably, be provided with cyclone 4 in a wind passage 13 outside, 9 are provided with cyclone 16 in the described preceding secondary air duct, and the air inlet place of secondary air duct 17 is provided with air door baffle plate 7 outside.

As preferably, dividing plate 18 be outside equipped with can slide along described dividing plate 18 front and back the guide shell 5 of band enlarging, the enlarging of described guide shell 5 is towards fiery side, and described guide shell 5 is fixedlyed connected with control lever 8, and the described guide shell 5 of described control lever 8 controls slides before and after described dividing plate 18 outer walls.

As preferably, described coal dust clasfficiator 15 is 2 to 4, flaring angle be 15 degree to 60 degree, the fiery face inclination angle of described guide shell 5 is that 30 degree are to 60 degree.

As preferably, the structure of described biconial enlarging 2 is the relative taper enlargings in inwall two sides.

Therefore, the utlity model has characteristics such as rational in infrastructure, easy to use, after especially the mozzle 12 of mounting strap enlarging, biconial enlarging 2, coal dust clasfficiator 15 and a wind are shunted tube 6 in windbend pipe 1 of burner.Improved the coal powder density of recirculating zone, center, just the easier local reduction atmosphere zone that occurs; Its momentum is big more, and its inertia of the easier dependence of its pulverized coal particle keeps stroke, and the time that stops in the reducing zone is longer, easy more ignition of coal dust and steady combustion, and the generation of Nox all can effectively be controlled in this two aspect.Owing to realize the coal dust classification, heat required when making coal powder ignition has been realized fuel-economizing or has been saved other igniting energy much smaller than the burner that does not carry out classification; Owing to be provided with the guide shell 5 that slides before and after carrying out along dividing plate 18, can regulate the air quantity of front and back secondary wind, thereby realize the minimizing of coking on the water-cooling wall 20.

Description of drawings

Accompanying drawing 1 is a kind of structural representation of the present utility model;

The specific embodiment

Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.

Consult Fig. 1, present embodiment comprises windbend pipe 1 one time, be positioned at the igniter 3 at windbend pipe 1 a straight section part center, be positioned at the radian at windbend pipe 1 a sweep center and the mozzle 12 of the band enlarging that windbend pipe 1 sweep adapts, be positioned at the biconial enlarging 2 behind the mozzle 12, be arranged at a wind shunting tube 6 behind the coal dust clasfficiator 15, interior wind passage 14, an outer wind passage 13, the enlarging of mozzle 12 is positioned at the import of a windbend pipe 1, the fiery dorsad side of the enlarging of coal dust clasfficiator 15, the minimum place of the internal diameter of biconial enlarging 2 is greater than the enlarging diameter maximum of coal dust clasfficiator 15, and the diameter of a wind shunting tube 6 is less than the minimum place of the diameter of coal dust clasfficiator 15.15,2 the coal dust clasfficiators 15 of 2 coal dust clasfficiators that are provided with that are positioned at after the biconial enlarging 2 reduce successively towards fiery side direction diameter, and the diameter of the enlarging maximum of a back coal dust clasfficiator 15 is less than the minimum place of the diameter of previous coal dust clasfficiator 15.Secondary air duct 10 and outer secondary air duct 17 in the outside of a windbend pipe 1 has, before being divided into by the dividing plates 18 of tubular in the described outer secondary air duct 17 secondary air duct 9 with after secondary air duct 11.Be provided with cyclone 4 in a wind passage 13 outside, 9 are provided with cyclone 16 in preceding secondary air duct, and the air inlet place of secondary air duct 17 is provided with air door baffle plate 7 outside.Dividing plate 18 be outside equipped with can slide along dividing plate 18 front and back the guide shell 5 of band enlarging, the enlarging of guide shell 5 is towards fiery side, guide shell 5 is fixedlyed connected with control lever 8, the slip before and after dividing plate 18 outer walls of control lever 8 control guide shells 5.

In use, after the coal dust air of sending here from wind pulverized coal feed pipe enters windbend pipe 1, diversed pipe 12 carries out preliminary classification, concentrates, be interior dense outer light two crural ring shape air-flows with breeze airflow by inertial separation through biconial enlarging 2 and coal dust clasfficiator 15 again, at last by shunting tube 6, breeze airflow is divided into an interior wind 14 and outer wind 13 two parts, and an interior wind sprays into burner hearth 19 after nozzles 21 are lighted.Spray into the center recirculating zone core of position over against burner.Because an interior wind breeze airflow is along the increase of its flow process, its coal powder density near center line K is more and more denseer.Coal powder density is high more, just the easier local reduction atmosphere zone that occurs; Its momentum is big more, and its inertia of the easier dependence of its pulverized coal particle keeps stroke, and the time that stops in the reducing zone is longer, easy more ignition of coal dust and steady combustion, and the generation of burning type Nox all can effectively be controlled in this two aspect.Make outer wind rotation through cyclone 4, form the recirculating zone, center in the central area of burner.Because dense outer light two parts in a time wind has been divided into, thereby formed fractional combustion, realized the discharging of low Nox, discharge when high at Nox, can pass through damper baffle plate 7, the flow of swirl secondary air in the secondary air duct 9 before reducing, the flow of direct current secondary wind in the secondary air duct 11 after increasing, swirl secondary air and the mixed of a wind are weakened, so just can reduce Nox; Because realize the coal dust classification, heat required when making coal powder ignition significantly reduces, thereby realized fuel-economizing or saved other igniting energy; Simultaneously,, be increased in the coal dust amount of the recirculating zone, center of high temperature, prolong coal dust, help the after-flame of coal dust, can realize the smooth combustion of different quality coals in the time of staying of the recirculating zone, center of high temperature owing to recirculating zone, center temperature height.When using the coal of coking trend, removable shunting tube 5 is to close water-cooling wall 20 sides, and also removable simultaneously baffle plate 7 is secondary wind 9 sides forward, the speed and the air quantity of back secondary wind 11 are increased, water-cooling wall is purged, form the wind screen simultaneously, avoid pulverized coal particle collision water-cooling wall.

The utility model mainly is suitable for the burner as big-and-middle-sized coal-burning boiler.Many parameters in the utility model all can change as the flaring angle of biconial enlarging, the flaring angle of coal dust clasfficiator and the parameters such as angle at fiery face inclination angle, can adjust accordingly different coals and operating mode.This burner has lower Nox discharge capacity, can realize combustion with reduced pollutants.Simultaneously, the steady right property of the underload of this burner is strong, can conveniently stably burner be regulated under the situation of operating mode and coal variation.

Claims (9)

1. fractional combustion vortex burner, comprise a windbend pipe (1), be positioned at the igniter (3) at a windbend pipe (1) straight section part center, it is characterized in that: the mozzle (12) that also comprises the band enlarging that the radian that is positioned at a described windbend pipe (1) sweep center and a described windbend pipe (1) sweep adapt, be positioned at the biconial enlarging (2) behind the described mozzle (12), be positioned at the coal dust clasfficiator (15) of the band enlarging after the described biconial enlarging (2), be arranged at the wind shunting tube (6) behind the described coal dust clasfficiator (15), an interior wind passage (14), an outer wind passage (13), the enlarging of described mozzle (12) is positioned at the air inlet of a described windbend pipe (1), the fiery dorsad side of the enlarging of described coal dust clasfficiator (15), the minimum place of the internal diameter of described biconial enlarging (2) is greater than the enlarging diameter maximum of described coal dust clasfficiator (15), and the diameter of described wind shunting tube (6) is equal to or less than the minimum place of diameter of described coal dust clasfficiator (15).
2. fractional combustion vortex burner according to claim 1, it is characterized in that: be provided with a plurality of coal dust clasfficiators (15) along center line (K) in the described windbend pipe (1), a plurality of coal dust clasfficiators (15) reduce successively towards fiery side direction diameter, and the diameter of the enlarging maximum of a back coal dust clasfficiator (15) is equal to or less than the minimum place of diameter of previous coal dust clasfficiator (15).
3. fractional combustion vortex burner according to claim 1 and 2, it is characterized in that: there are interior secondary air duct (10) and outer secondary air duct (17) in the outside of a described windbend pipe (1), and the dividing plate (18) by tubular in the described outer secondary air duct (17) is divided into preceding secondary air duct (9) and back secondary air duct (11).
4. fractional combustion vortex burner according to claim 3, it is characterized in that: be provided with cyclone (4) in the described outer wind passage (13), secondary air duct interior (9) is provided with cyclone (16) before described, and the air inlet place of secondary air duct (17) is provided with air door baffle plate (7) outside.
5. fractional combustion vortex burner according to claim 3, it is characterized in that: described dividing plate (18) be outside equipped with can slide before and after the described dividing plate (18) the guide shell (5) of band enlarging, the enlarging of described guide shell (5) is towards fiery side, described guide shell (5) is fixedlyed connected with control lever (8), and described control lever (8) is controlled described guide shell (5) and slided before and after described dividing plate (18) outer wall.
6. fractional combustion vortex burner according to claim 4, it is characterized in that: described dividing plate (18) be outside equipped with can slide before and after the described dividing plate (18) the guide shell (5) of band enlarging, the enlarging of described guide shell (5) is towards fiery side, described guide shell (5) is fixedlyed connected with control lever (8), and described control lever (8) is controlled described guide shell (5) and slided before and after described dividing plate (18) outer wall.
7. fractional combustion vortex burner according to claim 5 is characterized in that: described coal dust clasfficiator (15) is 2 to 4, flaring angle be 15 the degree to 60 the degree, the fiery face inclination angle of described guide shell (5) be 30 the degree to 60 the degree.
8. fractional combustion vortex burner according to claim 6 is characterized in that: described coal dust clasfficiator (15) is 2 to 4, flaring angle be 15 the degree to 60 the degree, the fiery face inclination angle of described guide shell (5) be 30 the degree to 60 the degree.
9. fractional combustion vortex burner according to claim 1 is characterized in that: the structure of described biconial enlarging (2) is the relative taper enlarging in inwall two sides.
CN 200620100978 2006-02-14 2006-02-14 Staged-combustion cyclone coal-powder combustor CN2869593Y (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101363625B (en) * 2008-09-26 2010-06-02 哈尔滨工业大学 Large speed ratio centrally powder-feeding cyclone burner for pulverized coal
CN101865462A (en) * 2010-06-09 2010-10-20 清华大学 Weak-cyclone primary air multi-stage separation cyclone burner
CN102353049A (en) * 2011-08-10 2012-02-15 深圳东方锅炉控制有限公司 Stable combustion device for pulverized coal ignition
CN103047657A (en) * 2012-12-19 2013-04-17 上海巴安水务股份有限公司 High-efficiency low NOx emission swirling burner and burning method thereof
CN103411215A (en) * 2013-08-26 2013-11-27 中节环立为(武汉)能源技术有限公司 Multi-directional jet-type cyclone pulverized coal burner
CN103759258A (en) * 2014-01-13 2014-04-30 徐州燃控科技股份有限公司 Fuel-saving/gas-ignition stable-combustion low-nitrogen swirling pulverized coal combustor
CN105135427A (en) * 2015-09-01 2015-12-09 山东华臻重工有限公司 Coal powder combustion system
CN105465781A (en) * 2016-01-15 2016-04-06 哈尔滨博深科技发展有限公司 Low-nitrogen-oxide-emission swirl pulverized coal burner with surrounding air

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101363625B (en) * 2008-09-26 2010-06-02 哈尔滨工业大学 Large speed ratio centrally powder-feeding cyclone burner for pulverized coal
CN101865462A (en) * 2010-06-09 2010-10-20 清华大学 Weak-cyclone primary air multi-stage separation cyclone burner
CN101865462B (en) * 2010-06-09 2012-01-18 清华大学 Weak-cyclone primary air multi-stage separation cyclone burner
CN102353049A (en) * 2011-08-10 2012-02-15 深圳东方锅炉控制有限公司 Stable combustion device for pulverized coal ignition
CN103047657A (en) * 2012-12-19 2013-04-17 上海巴安水务股份有限公司 High-efficiency low NOx emission swirling burner and burning method thereof
CN103411215A (en) * 2013-08-26 2013-11-27 中节环立为(武汉)能源技术有限公司 Multi-directional jet-type cyclone pulverized coal burner
CN103411215B (en) * 2013-08-26 2016-01-27 中节环立为(武汉)能源技术有限公司 Multidirectional jetting type vortex burner
CN103759258A (en) * 2014-01-13 2014-04-30 徐州燃控科技股份有限公司 Fuel-saving/gas-ignition stable-combustion low-nitrogen swirling pulverized coal combustor
CN103759258B (en) * 2014-01-13 2016-06-15 徐州科融环境资源股份有限公司 A kind of joint low nitrogen vortex burner of oil/gas ignition smooth combustion
CN105135427A (en) * 2015-09-01 2015-12-09 山东华臻重工有限公司 Coal powder combustion system
CN105135427B (en) * 2015-09-01 2017-07-11 山东富海泰来新能源科技有限公司 Pulverized coal combustion system
CN105465781A (en) * 2016-01-15 2016-04-06 哈尔滨博深科技发展有限公司 Low-nitrogen-oxide-emission swirl pulverized coal burner with surrounding air

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CP01 Change in the name or title of a patent holder

Address after: 314001, south side, No. four, South Road, Chengnan street, Nanhu District, Jiaxing, Zhejiang

Patentee after: MHPS DONGFANG BOILER CO., LTD.

Address before: 314001, south side, No. four, South Road, Chengnan street, Nanhu District, Jiaxing, Zhejiang

Patentee before: Eastern Hitachi boiler Limited Company

C56 Change in the name or address of the patentee

Owner name: DONGFANG MHPS BOLIER CO., LTD.

Free format text: FORMER NAME: DONGFANG RILI BOILER CO., LTD.

CP02 Change in the address of a patent holder

Address after: 314036 No. 1267, Chenggong Road, Zhejiang, Jiaxing

Patentee after: MHPS DONGFANG BOILER CO., LTD.

Address before: 314001, south side, No. four, South Road, Chengnan street, Nanhu District, Jiaxing, Zhejiang

Patentee before: MHPS DONGFANG BOILER CO., LTD.

C56 Change in the name or address of the patentee
CX01 Expiry of patent term

Granted publication date: 20070214

EXPY Termination of patent right or utility model