CN203980272U - A kind of New-type Swirl Flow coal burner - Google Patents

A kind of New-type Swirl Flow coal burner Download PDF

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Publication number
CN203980272U
CN203980272U CN201420388866.XU CN201420388866U CN203980272U CN 203980272 U CN203980272 U CN 203980272U CN 201420388866 U CN201420388866 U CN 201420388866U CN 203980272 U CN203980272 U CN 203980272U
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secondary air
air duct
furnished
flow
eddy
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吴道洪
金振全
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Shenwu Technology Group Corp Co Ltd
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Beijing Shenwu Environmental and Energy Technology Co Ltd
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Abstract

A kind of New-type Swirl Flow coal burner, comprise air channel, inward eddy secondary air duct, outer eddy flow secondary air duct, outer direct-current secondary air channel, in described inward eddy secondary air duct and outer eddy flow secondary air duct, be furnished with swirl vane, be furnished with the exit that triangular tooth surely fires ring and taper enlarging, inward eddy secondary air duct, outer eddy flow secondary air duct at a described ducting outlet place and be furnished with taper enlarging, in a described air channel, be furnished with wedge inspissator, in described outer direct-current secondary air channel, be furnished with torch oil gun.The utility model adopts Pulverized Coal Concentration device simple in structure to realize the deep or light separation of primary wind and powder air-flow, three secondary air channels are adopted, to ensure the efficient steady combustion of low-volatite coal, further reduce the discharge of NOx, to ensure not slagging scorification of burner hearth and produce high temperature corrosion etc. simultaneously, thereby realize efficient, the low nitrogen, the safe operation that use low-volatite coal boiler unit.

Description

A kind of New-type Swirl Flow coal burner
Technical field
The utility model belongs to field of combustion technology, relates to a kind of New-type Swirl Flow coal burner, particularly the vortex burner of the multistage stagewise of a kind of radially deep or light formula Secondary Air.
Background technology
Power industry is basic energy industry, and current coal-fired thermal power generation accounts for the more than 70% of China's gross generation.China is just greatly developing nuclear energy power generation and various generation of electricity by new energy technology at present, but rich coal resources in China, the factor impacts such as the construction of nuclear power station cycle is long, can only be with base load and generation of electricity by new energy cost is higher, single-machine capacity is little, so remain the major way of China's generating in following one section of long period internal combustion coal thermal power generation.
High-efficiency low-pollution coal fired power generation technology is the developing direction of coal-fired thermal power generation, the function such as simultaneously realize efficient, low nitrogen (NOx), Anti-slagging, high temperature corrosion resistance, low-load combustion-stabilizing ability is strong, coal adaptability is good of will burning.For reaching this object, develop at present multiple high-efficiency low-pollution vortex burner.The high-efficiency low-pollution vortex burner common trait proposing is at present that secondary air channel is divided into inside and outside two passages, interior outer second air can regulate respectively, inside and outside two strands of Secondary Airs can be all vortex gas-flow, and also can adopt inner second air is the form that vortex gas-flow, outer second air are straight-flow air; The two tune wind combustor wherein adopting except Beijing Ba Wei company (BB & W), other several turbulent burners have all adopted the deep or light isolation technics of primary wind and powder air-flow.
Existing high-efficiency low-pollution vortex burner has been obtained certain effect at aspects such as efficient, low-nitrogen discharged, steady combustions, but the not problem such as comparatively serious, NOx emission reduction efficiency is not high, partial combustion device central tube serious wear of strong (being difficult to be applicable to the anthracite meager coal of low volatile), high temperature corrosion and coking of ubiquity coal adaptability.China's coal in power plant is changeable, the power plant that uses low-volatite coal increases day by day, add environmental regulation increasingly stringent (requirement can significantly reduce discharged nitrous oxides), develop a kind of New-type Swirl Flow coal burner and seem particularly important to adapt to these requirements.
Utility model content
The purpose of this utility model is the problem and shortage existing for above-mentioned existing vortex burner, propose a kind of new and effective, low nitrogen, coal is applied widely, the swirling pulverized coal combustion device of safe operation, this device adopts Pulverized Coal Concentration device simple in structure to realize the deep or light separation of primary wind and powder air-flow, three secondary air channels are adopted, to ensure the efficient steady combustion of low-volatite coal, further reduce the discharge of NOx, ensure not slagging scorification of burner hearth simultaneously and produce high temperature corrosion etc., use the efficient of low-volatite coal boiler unit thereby realize, low nitrogen, safe operation.
For achieving the above object, the technical solution of the utility model is: a kind of New-type Swirl Flow coal burner, comprise an air channel (1), inward eddy secondary air duct (4), outer eddy flow secondary air duct (2), outer direct-current secondary air channel (3), in described inward eddy secondary air duct (4), be furnished with the first swirl vane (11) and the first adjusting yoke (13), in described outer eddy flow secondary air duct (2), be furnished with the second swirl vane (9) and the second adjusting yoke (12), be furnished with triangular tooth in described exit, an air channel (1) and surely fire ring (8) and the first taper enlarging (7), inward eddy secondary air duct (4) exit is furnished with the second taper enlarging (6), the exit of outer eddy flow secondary air duct (2) is furnished with triconic enlarging (5), in a described air channel (1), be furnished with wedge inspissator (10), in described outer direct-current secondary air channel (3), be furnished with torch oil gun (14),
In an air channel (1), front end is provided with wedge pulverized coal concentrator (10) near exit, and breeze airflow is divided into two strands in radial direction, and inside is thick coal culm air-flow, and outside is thin powdered coal air-flow, has realized bias combustion; In described New-type Swirl Flow coal burner, have three layers of secondary air duct, be respectively inward eddy secondary air duct (4), outer eddy flow secondary air duct (2), outer direct-current secondary air channel (3), the swirl vane (9) (11) that wherein in inward eddy secondary air duct (4), outer eddy flow secondary air duct, (2) are arranged adopts adjustable, and tertiary air road air quantity can regulate by import baffle plate; Be furnished with steady combustion ring (8) at a ducting outlet place, be shaped as triangular tooth; Exit at a described air channel, inward eddy secondary air duct, outer eddy flow secondary air duct is furnished with taper enlarging.
Further, secondary air duct is radially divided into inward eddy secondary air duct (4) from inside to outside, outer eddy flow secondary air duct (2), outer direct-current secondary air channel (3).
Further, the first and second swirl vanes (9) (11) that in inward eddy secondary air duct (4), outer eddy flow secondary air duct, (2) are arranged adopt adjustable swirl vane.
Further, torch oil gun (14) is arranged in top, outer direct-current secondary air channel (3) with certain downtilt angles.
The utility model is according to there being following technical characterstic: (1) the utility model has adopted wedge pulverized coal concentrator, triangular tooth surely to fire after ring and taper enlarging in an air channel, realize pulverized coal bias combustion, contributed to efficient burning and the low-load combustion-stabilizing of low volatile coal dust.(2) the utility model has arranged that at middle outlet place, an air channel triangular tooth surely fires ring, thereby has set up suitable high temperature recirculation zone outward at burner outlet, is conducive to coal dust, particularly catching fire and smooth combustion of low volatile coal dust.(3) the utility model burner has good fuel tolerance and Load Regulation.When load variations, first can be by regulating independently wind-box damper to regulate the air quantity ratio in three layers of secondary air duct; Can regulate the angle of the swirl vane of arranging in inward eddy secondary air duct, outer eddy flow secondary air duct to change swirl strength; Owing to having adopted direct current tertiary air, finning can avoid underrun time, is conducive to low-load combustion-stabilizing.(4) the utility model burner has adopted three layers of secondary air duct, has realized burner region degree of depth Researched of Air Staging Combustion Burning Pulverized Coal (radial air classification); Simultaneously the exit of inward eddy secondary air duct, outer eddy flow secondary air duct adopts taper enlarging, can postpone Secondary Air and sneak into the time of primary wind and powder air-flow.These measures have formed catching fire of reproducibility and combustion atmosphere, contribute to significantly to reduce the discharge of nitrogen oxide.(5) the utility model burner has adopted tertiary air road (outer direct-current secondary air channel), contribute to pressing close to water-cooling wall place formation selective oxidation atmosphere, thereby effectively avoid water-cooling wall slagging scorification and High Temperature Corrosion, improved the security of operation.(6) the utility model burner has been cancelled central tube, has avoided the problem of central tube serious wear, thereby has further improved the security of operation.
Brief description of the drawings
Fig. 1 is the structural representation of a kind of New-type Swirl Flow coal burner of providing of the utility model.
Fig. 2 is the right view of Fig. 1.
Detailed description of the invention
Understand the utility model for further clear, by reference to the accompanying drawings 1 and accompanying drawing 2, describe structure of the present utility model, operation principle and embodiment in detail.
Fig. 1 and Fig. 2 are the structural representations of a kind of New-type Swirl Flow coal burner of the utility model.It comprises air channel 1 one time, inward eddy secondary air duct 4, outer eddy flow secondary air duct 2, tertiary air road (outer direct-current secondary air channel) 3, in described inward eddy secondary air duct 4, be furnished with swirl vane 11 and adjusting yoke 13, in described outer eddy flow secondary air duct 2, be furnished with swirl vane 9 and adjusting yoke 12, be furnished with triangular tooth at a described ducting outlet place and surely fire ring 8 and taper enlarging 7, inward eddy secondary air duct 4 exits are furnished with taper enlarging 6, the exit of outer eddy flow secondary air duct 2 is furnished with taper enlarging 5, in a described air channel 1, be furnished with wedge inspissator 10, in described tertiary air road (outer direct-current secondary air channel) 3, be furnished with torch oil gun 14.
Its operation principle is:
(1) in an air channel, adopt wedge pulverized coal concentrator 10, triangular tooth surely to fire ring 8 and taper enlarging 7, thereby realized interior radially bias combustion of dense outer light coal dust, contributed to efficient burning and the low-load combustion-stabilizing of low volatile coal dust.
(2) in inward eddy secondary air duct 4, be furnished with swirl vane 11 and adjusting yoke 13, in swirl secondary air road 2, be furnished with outside swirl vane 9 and adjusting yoke 12, can regulate the angle of swirl vane to change swirl strength by adjusting yoke, thereby change the size of recirculating zone, reach and change ignition point and the object of fire intensity.Can adapt to preferably the variation of coal and load.
(3) arranged that at middle outlet place, an air channel triangular tooth surely fires ring 8, after tooth, formed and stay whirlpool, be beneficial to and catch fire; In burner outlet has been set up suitable high temperature recirculation zone outward and strengthened dense powder stream and high temperature recirculation zone, the mixing of flue gas, is conducive to coal dust, particularly catching fire and smooth combustion of low volatile coal dust; Can increase dense powder stream circumferential length, further strengthen mixing, be beneficial to coal dust, particularly catching fire and smooth combustion of low volatile coal dust.
(3) adopted direct current tertiary air passage 3, finning can avoid underrun time, is conducive to low-load combustion-stabilizing; Contribute to pressing close to water-cooling wall place formation selective oxidation atmosphere, thereby effectively avoided water-cooling wall slagging scorification and High Temperature Corrosion, improved the security of operation.
(4) adopt three layers of secondary air duct, thereby realized radially multi-staged air fractional combustion of burner region, formed catching fire and combustion atmosphere of reproducibility, contributed to significantly to reduce the discharge of nitrogen oxide.
(5) exit of inward eddy secondary air duct 4, outer eddy flow secondary air duct 2 adopts taper enlarging 6 and 5, thereby postponement Secondary Air is sneaked into the time of primary wind and powder air-flow, further reduces the discharge of nitrogen oxide.
The utility model is mainly applicable to big-and-middle-sized generating plant pulverized coal boiler.A kind of New-type Swirl Flow coal burner of the utility model has that efficiency of combustion is high, coal and load adaptability is strong, flexible adjustment, can the degree of depth deviate from nitrogen oxide, the feature such as safe and reliable to operation,
The above is only preferred embodiment of the present utility model; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims (4)

1. a New-type Swirl Flow coal burner, comprise an air channel (1), inward eddy secondary air duct (4), outer eddy flow secondary air duct (2), outer direct-current secondary air channel (3), in described inward eddy secondary air duct (4), be furnished with the first swirl vane (11) and the first adjusting yoke (13), in described outer eddy flow secondary air duct (2), be furnished with the second swirl vane (9) and the second adjusting yoke (12), be furnished with triangular tooth in described exit, an air channel (1) and surely fire ring (8) and the first taper enlarging (7), inward eddy secondary air duct (4) exit is furnished with the second taper enlarging (6), the exit of outer eddy flow secondary air duct (2) is furnished with triconic enlarging (5), in a described air channel (1), be furnished with wedge inspissator (10), in described outer direct-current secondary air channel (3), be furnished with torch oil gun (14),
It is characterized in that: in an air channel (1), front end is provided with wedge pulverized coal concentrator (10) near exit, breeze airflow is divided into two strands in radial direction, inside is thick coal culm air-flow, and outside is thin powdered coal air-flow, has realized bias combustion; In described New-type Swirl Flow coal burner, have three layers of secondary air duct, be respectively inward eddy secondary air duct (4), outer eddy flow secondary air duct (2), outer direct-current secondary air channel (3), the swirl vane (9) (11) that wherein in inward eddy secondary air duct (4), outer eddy flow secondary air duct, (2) are arranged adopts adjustable, and tertiary air road air quantity can regulate by import baffle plate; Be furnished with steady combustion ring (8) at a ducting outlet place, be shaped as triangular tooth; Exit at a described air channel, inward eddy secondary air duct, outer eddy flow secondary air duct is furnished with taper enlarging.
2. a kind of New-type Swirl Flow coal burner according to claim 1, is characterized in that: secondary air duct is radially divided into inward eddy secondary air duct (4), outer eddy flow secondary air duct (2), outer direct-current secondary air channel (3) from inside to outside.
3. a kind of New-type Swirl Flow coal burner according to claim 1, is characterized in that: the first and second swirl vanes (9) (11) that in inward eddy secondary air duct (4), outer eddy flow secondary air duct, (2) are arranged adopt adjustable swirl vane.
4. a kind of New-type Swirl Flow coal burner according to claim 1, is characterized in that: torch oil gun (14) is arranged in top, outer direct-current secondary air channel (3) with certain downtilt angles.
CN201420388866.XU 2014-07-15 2014-07-15 A kind of New-type Swirl Flow coal burner Active CN203980272U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104197326A (en) * 2014-07-15 2014-12-10 北京神雾环境能源科技集团股份有限公司 Novel swirl pulverized coal burner
CN111998336A (en) * 2020-09-14 2020-11-27 哈尔滨锅炉厂有限责任公司 Direct-flow pulverized coal burner with thick outside and thin inside

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104197326A (en) * 2014-07-15 2014-12-10 北京神雾环境能源科技集团股份有限公司 Novel swirl pulverized coal burner
CN111998336A (en) * 2020-09-14 2020-11-27 哈尔滨锅炉厂有限责任公司 Direct-flow pulverized coal burner with thick outside and thin inside
CN111998336B (en) * 2020-09-14 2022-07-26 哈尔滨锅炉厂有限责任公司 Direct-flow pulverized coal burner with thick outer part and thin inner part

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Address after: 102200 Beijing City, Changping District science and Technology Park Chang Huai Lu No. 155

Patentee after: Shenwu science and technology group Limited by Share Ltd

Address before: 102200 Beijing city Changping District Machi Town cow Road No. 18

Patentee before: Beijing Shenwu Environment Energy Technology Group Co., Ltd.

PE01 Entry into force of the registration of the contract for pledge of patent right
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of utility model: Novel swirl pulverized coal burner

Effective date of registration: 20180322

Granted publication date: 20141203

Pledgee: The Bank of Beijing Limited by Share Ltd Anwar Road Branch

Pledgor: Shenwu science and technology group Limited by Share Ltd

Registration number: 2018990000210

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Effective date of registration: 20190121

Granted publication date: 20141203