CN201496957U

CN201496957U - Cyclone pulverized coal burner

Info

Publication number: CN201496957U
Application number: CN2009202338002U
Authority: CN
Inventors: 戴卫军; 李月华
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-07-31
Filing date: 2009-07-31
Publication date: 2010-06-02
Anticipated expiration: 2019-07-31

Abstract

The utility model discloses a cyclone pulverized coal burner, comprising a primary wind bent pipe and an internal pulverized coal flow equalization board; a grease-gun sleeve is installed at the center of the burner; the primary wind bent pipe is internally provided with a pulverized coal concentration ring; a pulverized coal concentration device is installed at the center of the front end; a throughflow secondary wind channel and a secondary wind channel producing rotational flow by using radial sheets are respectively distributed at the outer side of a primary wind channel; and the flame profile and the wind mixing time can be controlled so as to achieve the purposes of quick firing, stable burning and control of nitrogen oxide discharge.

Description

Vortex burner

Technical field:

The utility model relates to a kind of vortex burner, is applied on the station boiler equipment of coal dust burning, relates to be appropriate to reduce nitrous oxides concentration (Nox) and have well prevent a kind of radial vortex coal burner of wearing and tearing.

Background technology:

Nitrogen oxide (Nox) is the major pollutants that cause atmosphere pollution, and it removes and forms acid rain, destroys ecological environment, can also form photochemical fog, is detrimental to health.By new GB13223-2003 " 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 the boiler of combusting coal fines, two kinds of corner tangential firing and swirl flow combustions are arranged.Swirl flow combustion is widely used in the coal-fired power station boiler.Mainly contain two wind turbulent burners of transferring at present, promptly belong to the burner of the type such as Granted publication CN1920382, title " a kind of rotational flow pulverized coal burner ".This structure has adopted the light separating mechanism of 2-3 level coal dust, and is provided with rotational flow generator and horn mouth gets two, three grades of air nozzles.Though this burner can be realized bias combustion, realize the little and low power consumption and other advantages of cloudy power.But its Pulverized Coal Concentration complex structure, wearing and tearing easily; One time windbend head inlet is subjected to breeze airflow to wash away serious wear easily; Simultaneously, secondary air adopts cyclone, has increased SR and has made complex structure; And the axial cyclone mode of three swirler elegance, it regulates inconvenience, and can't realize the control of air quantity and swirl strength when regulating simultaneously.Therefore, though this structure can realize low Nox discharging and bias combustion, there is the primary air system serious wear in this structure, and the secondary air resistance is bigger, and three grades of air can't be realized the drawback that flow and swirl strength are regulated simultaneously.

Summary of the invention:

The purpose of this utility model is a kind of turbulent burner that designs at the defective that background technology exists, by taking special construction and reasonable Arrangement, mainly solve the big technical problem of burner coal dust passage wearing and tearing of the prior art, simultaneously by direct current secondary air flow and swirl secondary air amount and swirl strength outside air channel of convenient adjusting, the incorporation time and the proportioning of control wind powder, make that burner reaches efficiently, smooth combustion, and discharged nitrous oxides is effectively reduced, provide a kind of and can satisfy the combustibility requirement, can effectively reduce the vortex burner of wearing and tearing again.

The utility model technical problem is mainly solved by following technical proposals: a kind of vortex burner, be by a windbend pipe, homogenizing plate, the Pulverized Coal Concentration ring, an airduct road, adjusting yoke, outer sleeve, the Pulverized Coal Concentration device, ceramic sleeve, stabilizing ring, gripper shoe is formed, it is characterized in that: be provided with the coal dust homogenizing plate in the inside of a windbend pipe, the burner center is provided with the oil gun sleeve pipe, both sides up and down in airduct road are provided with the Pulverized Coal Concentration ring, front end center in airduct road is provided with the Pulverized Coal Concentration device, the windward side of described enrichment facility is provided with global formation abrasionproof ceramic sleeve, and the gripper shoe of enrichment facility by the below is supported in air channel; Burner nozzle adopts trumpet-shaped band surely to fire the flameholding ring of tooth, the flameholding ring is connected with the outer sleeve in the outside, air channel, be furnished with the secondary air duct of direct current respectively and adopt the radially secondary air duct of sheet generation eddy flow in the outside, an air channel, direct current and swirl secondary air road intake can pass the burner panel by adjusting yoke and pull bar respectively and regulate when operation, the swirl vane angle is regulated by adjusting rod.The utlity model has characteristics rational in infrastructure, easy to use.

Description of drawings:

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

1. 4. airduct roads of windbend pipe 2. homogenizing plates, 3. Pulverized Coal Concentration rings, 5. adjusting yokes, 6. outer sleeves, 7. Pulverized Coal Concentration devices, 8. ceramic sleeves, 9. stabilizing rings, 10. gripper shoes, 11. direct current secondary air ducts, 12. swirl secondary air roads, 13. pull bars, 14. oil gun sleeve pipes, 15. panels, 16. adjusting rods

The specific embodiment:

Below by embodiment, the technical solution of the utility model is further described.

In the drawings, a kind of vortex burner of the utility model, be by a windbend pipe, homogenizing plate, the Pulverized Coal Concentration ring, an airduct road, adjusting yoke, outer sleeve, the Pulverized Coal Concentration device, ceramic sleeve, stabilizing ring, gripper shoe is formed, a windbend pipe 1, be positioned at the coal dust homogenizing plate 2 of windbend pipe import, a windbend pipe import horizontal segment Pulverized Coal Concentration ring 3, be positioned at the pulverized coal concentrator 7 of oil gun sleeve pipe 14 burner hearth sides, also comprise the bulk ceramics cover 8 of enrichment facility 7 windward sides and support 10, direct current secondary air duct 11 and accent wind pull bar 5 thereof, swirl secondary air road 12 and accent

wind pull bar

13 and 16 thereof.Because the porch of a windbend pipe 1 is provided with homogenizing plate 2 and is arranged on the inclined to one side burner hearth outside, windbend pipe 1 interior center certain distance, make the coal dust that enters bend pipe top be less than the coal dust that enters the bottom, because the inertia of coal dust operation, increase at concentrated ring 3 import department's center coal dusts, reduced undergauge place, the outside and impacted the wearing and tearing that wall produces because the coal dust traffic direction changes, avoided coal dust mainly concentrating on the bottom at center Pulverized Coal Concentration device 7 places simultaneously, produced bigger wearing and tearing in gripper shoe 10 windward sides through concentrating ring 3 backs.During concrete enforcement, in windbend pipe 1 of burner homogenizing plate 2 is set, makes coal dust shunt, effectively alleviated the wearing and tearing of air channel 4 interior each parts at combustor inlet; In the Pulverized Coal Concentration ring oven outside is the wear-resistant ceramic structure, improves the abrasionproof performance of product, and segmental structure easy access is simultaneously changed; Arrange bulk ceramics sleeve 8 in the windward side of Pulverized Coal Concentration device 7, avoid present technology fritter pottery easily to come off and form source of wear in splicing place because of high temperature; Fillet structure is adopted in enrichment facility gripper shoe 10 windward sides, reduces coal dust and locates resistance at this, improves the abrasionproof performance at this position; Steady combustion ring 9 is connected with an airduct outer sleeve 6, makes burner structure simple, is convenient to maintenance, avoid the coal dust source of wear that forms because of the interior too much segmentation joint face in air channel 4 or bolt connecting hole simultaneously, has greatly optimized the polishing machine that prevents in the air channel; At direct current secondary wind and swirl secondary air import the air quantity adjusting yoke is set all, regulate air quantity size and proportioning according to coal dust situation and flame situation, enforcement by this example, can fully effectively increase the abrasion life-span of an air channel inner part, comparatively even owing to concentrating on the center behind the concentrated ring of coal dust process simultaneously, coal dust arrives the spout place through enrichment facility 7, energy forms and prolongs the circumferentially outer uniformly dense interior light breeze airflow of spout, extend out horn mouth shape and direct current secondary wind and the air quantity adjustable by what spout surely fired ring 9 with peripheral air quantity, the all adjustable swirl secondary air of swirl strength cooperates, the spout place forms high temperature recirculation zone, control the incorporation time of flame profile and wind simultaneously, reach fast and catch fire, the purpose of flameholding and control nitrogen oxide (Nox) discharging.

Claims

1. vortex burner, be by a windbend pipe, homogenizing plate, the Pulverized Coal Concentration ring, an airduct road, adjusting yoke, outer sleeve, the Pulverized Coal Concentration device, ceramic sleeve, stabilizing ring, gripper shoe is formed, it is characterized in that: be provided with the coal dust homogenizing plate in the inside of a windbend pipe, the burner center is provided with the oil gun sleeve pipe, both sides up and down in airduct road are provided with the Pulverized Coal Concentration ring, front end center in airduct road is provided with the Pulverized Coal Concentration device, the windward side of described enrichment facility is provided with global formation abrasionproof ceramic sleeve, and the gripper shoe of enrichment facility by the below is supported in air channel; Burner nozzle adopts trumpet-shaped band surely to fire the flameholding ring of tooth, the flameholding ring is connected with the outer sleeve in the outside, air channel, be furnished with the secondary air duct of direct current respectively and adopt the radially secondary air duct of sheet generation eddy flow in the outside, an air channel, direct current and swirl secondary air road intake can pass the burner panel by adjusting yoke and pull bar respectively and regulate when operation, the swirl vane angle is regulated by adjusting rod.