CN2226200Y - General coal powder burner with adjustable firing point position double ways - Google Patents

Abstract

The utility model relates to a general coal powder burner with an adjustable firing point position and double ways, composed of upper and lower primary air channels, an end air channel and a side edge air channel between the upper and lower primary air channels. Two streams of primary air coal powder enter reflow space through the upper and lower channels, forming high temperature flue gas reflux which is mixed with the incoming primary air, causing the coal powder to be heated, to fire and to burn in advance. The side edge air and the end air are used to adjust the fire point position of the coal powder. The utility model has the advantages of controllable fire point of the coal powder and burning for various coal for power.

Description

The binary channels general-purpose coal fines combustion device that ignition point position is adjustable

The utility model relates to the adjustable binary channels general-purpose coal fines combustion device of a kind of ignition point position, belongs to combustion technology and energy saver field.

China is to be the country of main fuel with the coal, but ature of coal is changeable.Wherein anthracite is because its volatile content is low, so it catches fire, surely fires performance and efficiency of combustion is all relatively poor.Abroad be known as and have only W shape flame furnace could normally burn anthracite, and how tangentially fired boiler because its cost is low, therefore makes its anthracite that can normally burn, attractive.In addition, changeable and underrun often causes burner hearth fire extinguishing, " blowing out " because China is because of ature of coal, even blast, cause serious equipment, personal injury, and traditional burner or other novel burners can't address these problems.Therefore need the general-purpose coal fines combustion device that a kind of various steam coals of development can both normal combustion.For this reason, the applicant once proposed a patent of invention in 91 years, the patent No. is 91105899.0, and denomination of invention is " methods of double-primary-air duct coal dust main burner and design and four jiaos of tangential-firing burners of transformation ", the burner of this patent design, its structure as shown in Figure 1, among the figure, 1 is a wind passage, the 2nd, and the control jet passage, the 3rd, boiler wall, the 4th, burner.The weak point of said burner, the one, the high-speed jet pore passage structure of burner two sides, be not easy to workman's operation, two when being to use this burner to use fat coal, be full of flame in the whole burner, ignition point position can't be pushed into the burner outlet place, thereby can cause the overheated of burner, even burn out.

The purpose of this utility model is the adjustable binary channels general-purpose coal fines combustion device of a kind of ignition point position of design, structure to existing burner makes improvements, position with ignition point in the control burner, when assurance uses various steam coal, coal powder ignition point position can both be effectively controlled, thereby guarantees the safe operation of burner.

The adjustable binary channels general-purpose coal fines combustion device of ignition point position of the utility model design comprises the wind passage one time, end air inlet duct and two side air channels.One time the wind passage has upper and lower two, and air channel, end and two crosswind roads are located between the upper and lower wind passage.The end air inlet duct places the middle part of burner end, and two crosswind roads place the both sides in the burner respectively.

Description of drawings:

Fig. 1 is the structural representation of prior art.

Fig. 2 is the structural representation of the burner of the utility model design.

Fig. 3 is the side view of Fig. 2.

Below in conjunction with accompanying drawing, introduce content of the present utility model in detail.Among Fig. 2 and Fig. 3, the 5th, last wind passage, 6 is a wind, the 7th, the air channel, end, the 8th, wind passage next time, the 9th, furnace wall, the 10th, constitute the side plate in side air channel, the 11st, backflow space, the 12nd, side air channel.

The burner operation principle of the utility model design is: coal dust enters burner from upper and lower two in the same way wind passages 5 and 8, is the backflow space between two wind passages, and its height H is greater than 250mm.Two strands of wind coal dusts enter backflow space 11 through passage 5 and 8, just form high temperature gases recirculating, and mix with a wind that enters from passage 5 and 8, make coal dust heat in advance, catch fire, burn.Side air channel 12 is formed by the space between side plate 10 and the burner wall, is used for regulating the position of coal powder ignition point.Need only just can control ignition point position with side wind to low volatilization fine coal, thereby make burner can adapt to the needs of the changeable and underrun of coal.Ature of coal difference and load can turn down even close side wind when low.Can open big side wind when full load or ature of coal are better.For this reason, the length of side plate 10 can be regulated between 0-L.L is a burner length, L=0～0.8m.When L=0, the side air channel becomes the side air port, and secondary wind or cold wind from then on air port enter burner.The length in side air channel is relevant with the use ature of coal.

When using fat coal certainly, must use side wind and end wind could control the position of coal powder ignition point effectively simultaneously, otherwise the easy burn-out burner.The unlatching in side air channel and air channel, end or close according to ature of coal and decide.

Side wind can be secondary wind, also cold wind; End wind can be secondary wind, also can lean on the air in the negative pressure suction environment in the burner.

Claims (3)

1, the adjustable binary channels general-purpose coal fines combustion device of a kind of ignition point position comprises the wind passage one time, and its feature is in also comprising end air inlet duct and two side air channels; A described wind passage has upper and lower two, and air channel, end and two crosswind roads are located between the upper and lower wind passage, and the air channel, end places the middle part of burner end, and two crosswind roads place the both sides in the burner respectively.

2, burner as claimed in claim 1 is characterized in that the distance H 〉=250mm between the described upper and lower wind passage.

3, burner as claimed in claim 1 or 2, the length L that it is characterized in that described crosswind by-pass is 0～0.8m.

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