CN203586214U

CN203586214U - Air diverter of gas burner of industrial kiln

Info

Publication number: CN203586214U
Application number: CN201320714519.7U
Authority: CN
Inventors: 黄显模
Original assignee: Beijing SUNTOUCH Thermprocess Equipment Co Ltd
Current assignee: Beijing SUNTOUCH Thermprocess Equipment Co Ltd
Priority date: 2013-11-14
Filing date: 2013-11-14
Publication date: 2014-05-07
Anticipated expiration: 2023-11-14

Abstract

The utility model relates to structures of gas burners of industrial kilns, in particular to an air diverter of a gas burner of an industrial kiln. The air diverter is characterized in that the air diverter is an opening pipe with a bottom at one end, a mounting hole is arranged at the center of the bottom, a circle of axial air holes is arranged on the periphery of the mounting hole, more than a circle of radial air holes is arranged on the pipe wall of the diverter, radial throats converging inwards from first step upward are arranged in a diverter pipe, a diversion plate is arranged at an opening end of the diverter, and a plurality of notches are uniformed arranged on the outer edge of the diversion plate. The air diverter is provided with the axial and radial air holes and the inwards-converging radial throats, so that a gas nozzle and the air diverter are enabled to form a multistep pre-burning chamber, forming of a gas-rich area and oxygen-poor burning during gas burning is facilitated, and generation and emission of nitrogen oxide are reduced. The air diverter achieves obvious emission reduction effect after being put into production, and is a helpful design beneficial to lowering nitrogen oxide emission and environment protection.

Description

Industrial furnace fuel burner nozzle air deflector

Technical field

The utility model relates to the structure of industrial furnace fuel burner nozzle, especially about a kind of industrial furnace fuel burner nozzle air deflector.

Background technology

The fuel burner nozzle that China's industrial furnace is conventional belongs to injection, eddy current, telescopic structure substantially, be combustion gas with combustion air first at inner half premix of burner or mix completely, then in combustion chambers burn and spray to burner hearth, by the rational burner of configuration structure, can become controllable high-temperature furnace gas circulation at freeze profile, cause in stove temperature evenly, except radiant heat transfer, obviously improve convective heat transfer, be conducive to improve productivity ratio and the quality of product.But this burner is because combustion gas only carries out with air the structure that primary air mixes, and there is defect or deficiency in oxygen concentration when burner combustion, flame temperature, disposal of pollutants and the aspect such as energy-conservation.Even the currently used a kind of high-speed fuel gas burner being formed by structures such as housing, Gas Pipe, air hose, combustion tube, nozzles, though be widely used in industrial furnace, but, the burner of this structure is not only for overcoming the defect deficiency of aforementioned several respects or producing little effect, and importantly the generation to nitrogen oxide and discharge have no improvement.Along with social development to energy-conservation and and the requirement of environmental protection, how more effectively to reduce industrial furnace produce in generation and the discharge of nitrogen oxide, the gas nozzle structure of development low-nitrogen oxide discharging is necessary, is also feasible.

Utility model content

The nitrogen oxide that combustion gas produces in combustion process is mainly nitric oxide and nitrogen dioxide, conventionally these two kinds of oxides is referred to as to nitrogen oxide.Our experiments show that, the nitrogen oxide that burner discharges is mainly nitric oxide, on average account for 95%, and nitrogen dioxide only accounts for 5% left and right.The nitric oxide that general fuel gas buring generates is mainly from two aspects, and the one, the oxidation of the middle nitrogen of air used (combustion air) that burn, the 2nd, institute's nitrogenate reoxidizing after thermal decomposition in combustion process in combustion gas.In most of burners, the former is nitric oxide production main source, and we are called this type of nitric oxide " thermal response nitric oxide ", and the latter is referred to as " combustion gas nitric oxide ", also has in addition " wink is sent out nitric oxide ".During burning, institute's nitric oxide that forms can make nitric oxide reduction become nitrogen dioxide with the reaction of nitrogen atom intermediate product.In fact except these reactions, nitric oxide can also generate nitrogen dioxide with various nitrogen-containing compounds.In order to reduce the generation of nitrogen oxide in combustion process, the time that while reducing burner combustion, concentration, flame temperature and the burning gases of combustion zone (high-temperature area) oxygen stop at high-temperature area is to reduce the key that nitrogen oxide generates and discharges.Current gas nozzle structure is combustion gas and air mixed once, at Shortcomings still aspect the mixing of the combustion gas of when burning and air, easily forms local oxygen-rich area, and combustion gas forms again localized hyperthermia district in the violent burning of oxygen-rich area.Therefore, developing new gas nozzle structure is feasible to overcome and to improve above-mentioned defect.

The purpose of this utility model, is to propose a kind of combustion gas can carry out multistage fully mixing and then reach completing combustion with air, and to reduce, nitrogen oxide generates and the structure member of discharge.The purpose of this utility model is to realize by following technical scheme: a kind of industrial furnace fuel burner nozzle air deflector, it is characterized in that air deflector is the open tube that there is the end one end, the center of bottom is equipped with installing hole, the outer axial pore of a circle that is arranged with of installing hole, the tube wall of air deflector is provided with radially pore more than a circle, in water conservancy diversion organ pipe, be provided with the radially reducing of the above toe-in of single order, the openend of air deflector is provided with deflector, and the outer rim of deflector is even is equipped with some gap; Axially center line and the air deflector axial line of pore intersect at a point, and crossing angle is less than 60 ° between the two, and axially pore is no less than 6, and axially the angle between center line and the air deflector axial line of pore is 20 °, and axially pore is made as 8; Radially the center line of pore and air deflector axial line intersect at a point, radially between the center line of pore and air deflector axial line, be provided with the angle of 10 °～90 °, radially pore is axially at least provided with 1 circle along air deflector, every circle is no less than 6 pores, radially the angle between the center line of pore and wireway axial line is made as 45 °, radially pore is made as 2 circles, and every circle is provided with 10 pores, the radially pore misphase setting at interval each other of two circles; The inner of air deflector opening is provided with radially reducing, and before inner and adjacent each radially porosity chart of air deflector opening, end is respectively respectively equipped with the radially reducing of 1 rank.

The industrial furnace fuel burner nozzle air deflector of implementing by technical solutions of the utility model, owing to having air deflector being provided with axially and pore radially and the radially reducing of toe-in, makes gas nozzle and air deflector form multistage precombustion chamber.When combustion gas is from nozzle ejection, form and repeatedly mix with the air that axially, radially pore enters from air deflector, be conducive to form fuel-rich gas area and combustion with meagre oxygen, thereby cause reducing the generation of nitrogen oxide.Meanwhile, the radially reducing of air deflector toe-in contributes to the acceleration of air-flow to flow, and is conducive to form high speed smoke gas flow and completing combustion.Through testing and facts have proved, the utility model has been obtained and has been subtracted more significantly emission effect after putting into production, and is a kind of useful design that is conducive to reduce discharged nitrous oxides and environmental protection.

Accompanying drawing explanation

Fig. 1 is the vertical section structure schematic diagram of a kind of embodiment of the utility model.

The specific embodiment

By reference to the accompanying drawings with regard to a kind of be provided with 2 enclose radially pore and 3 rank radially the air deflector of throat structure be embodiment, be described in further detail.The said air deflector 1 of the utility model is the open tube that there is the end one end, and the center of bottom is equipped with installing hole 6, and this hole is for being fitted to air deflector same being placed in combustion tube of nozzle of fuel burner nozzle.An outer circle axial pore 5 of totally 8 that is arranged with of installing hole, for air is concentrated, enter air deflector and form air-flow, axial pore 5 is arranged to have with air deflector axial line to the inclined hole of certain angle, be to be provided with the angle α that is less than 45 ° between the center line of axial pore 5 and the line of the axial line of air deflector 1, the present embodiment chosen axis is 20 ° to the angle α between center line and the wireway axial line of pore.For air is more fully provided to combustion gas, the present embodiment is provided with the tilting radially pore of 2

circles

2 and 4 at the tube wall of air deflector 1, its object is to provide 2 air to mix to combustion gas again, every circle is provided with 10 pores, between each tilting center line of radially

pore

2 and 4 and the axial line of air deflector 1, be provided with the angle β of 10 °～90 °, the angle β that the present embodiment is chosen is between the two 45 °.For making air deflector be full of air in 360 ° of phase places, the radially pore misphase settings at interval each other of two circles, last circle every two arrange between radially among the interval of pore 2 after the radially pore 4 of a circle.So, can make air stream phasetophase of 360 ° in air deflector be full of uniformly air.The openend of air deflector 1 is provided with deflector 3, and the outer rim of deflector 3 is even is equipped with 12 axial gap 30, and direct clearance to the gap in outer and combustion tube enters combustion chamber by the pipe of air deflector to be convenient to air.For improving the flow velocity of gas-air stream in air deflector, in water conservancy diversion organ pipe, be provided with altogether the radially reducing of 3 rank toe-ins, the present embodiment is except the inner of wireway opening is provided with radially reducing 9, and also before each radially

porosity chart

2 and 4, end is respectively respectively equipped with the radially reducing 7 and 8 of 1 rank.So-called radially reducing is in air deflector mouth of pipe the inner or pipe, to be provided with one section caliber to be punctured into gradually to the Taper Pipe that is less than bore, according to fluid mechanics principle, when fluid flows through light section by large section, its light-gauge flow velocity is greater than the flow velocity of large section, and the speed-raising of air mixture stream is conducive to the completing combustion of air mixture.In sum, when combustion gas is from nozzle ejection, mix successively with axial, the multistage radially pore leaked-in air from air deflector, meanwhile, 3 rank of air deflector toe-in radially the strong raising of reducing the flow velocity of mixed airflow, be conducive to form fuel-rich gas area and combustion with meagre oxygen, thereby cause reducing the generation of nitrogen oxide.Through testing and facts have proved, the utility model has been obtained and has been subtracted more significantly emission effect after putting into production, and is a kind of useful design that is conducive to reduce discharged nitrous oxides and environmental protection.

Claims

1. an industrial furnace fuel burner nozzle air deflector, is characterized in that air deflector is the open tube that there is the end one end, and the center of bottom is equipped with installing hole, the outer axial pore of a circle that is arranged with of installing hole; The tube wall of air deflector is provided with radially pore more than a circle; In water conservancy diversion organ pipe, be provided with the radially reducing of the above toe-in of single order; The openend of air deflector is provided with deflector, and the outer rim of deflector is even is equipped with some gap.

2. by industrial furnace fuel burner nozzle air deflector claimed in claim 1, it is characterized in that the center line of axial pore and air deflector axial line intersect at a point, crossing angle is less than 60 ° between the two, and axially pore is no less than 6.

3. by industrial furnace fuel burner nozzle air deflector claimed in claim 2, it is characterized in that the angle between center line and the air deflector axial line of axial pore is 20 °, axial pore is made as 8.

4. by industrial furnace fuel burner nozzle air deflector claimed in claim 1, it is characterized in that radially center line and the air deflector axial line of pore intersect at a point, radially between the center line of pore and air deflector axial line, be provided with the angle of 10 °～90 °.

5. by the industrial furnace fuel burner nozzle air deflector described in claim 1 or 4, it is characterized in that radially pore is axially at least provided with 1 circle along air deflector, every circle is no less than 6 pores.

6. by industrial furnace fuel burner nozzle air deflector claimed in claim 4, it is characterized in that the angle between center line and the wireway axial line of pore is radially made as 45 °.

7. by industrial furnace fuel burner nozzle air deflector claimed in claim 5, it is characterized in that radially pore is made as 2 circles, every circle is provided with 10 pores.

8. by industrial furnace fuel burner nozzle air deflector claimed in claim 7, it is characterized in that the radially pore misphase setting at interval each other of two circles.

9. by industrial furnace fuel burner nozzle air deflector claimed in claim 1, it is characterized in that the inner of air deflector opening is provided with radially reducing.

10. by industrial furnace fuel burner nozzle air deflector claimed in claim 1, it is characterized in that inner and adjacent each radially porosity chart of air deflector opening is held and is respectively respectively equipped with the radially reducing of 1 rank before.