CN2624060Y

CN2624060Y - Double vortex pulverized coal burner

Info

Publication number: CN2624060Y
Application number: CN 03241135
Authority: CN
Inventors: 吕宜德
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-04-04
Filing date: 2003-04-04
Publication date: 2004-07-07
Anticipated expiration: 2013-04-04

Abstract

The utility model relates to a double vortex coaldust burner applied in the industrial furnace. The utility model comprises a primary air inlet pipe, a primary air shell, a secondary air shell, a divergent cone, an impeller, an impeller adjusting bolt and a primary air stabilizing pipe. The utility model is characterized in that the primary air inlet pipe is tangentally connected with the primary air shell to make the air whirling; the air stabilizing pipe arranged in the primary shell is provided with an adjusting mechanism; a bushing is sleeved on the external wall of the primary air shell, and the bushing is provided with an adjusting mechanism. The utility model applies the approach of double vortex air feeding to make the air and the coaldust in better mixture; and the form and the fire range of the blaze are adjustable; therefore, the utility model is suitable in the different hearths to achieve the ideal combustion state; thus the heat efficiency of the furnance is greatly increased. The utility model is particularly applicable in the cement kiln.

Description

Bispin streaming coal burner

(1) technical field: the utility model relates to the bispin streaming coal burner that uses on a kind of improved coal burner, particularly Industrial Stoves.

(2) background technology: the burner (also claiming burner) that uses on the Industrial Stoves generally is old-fashioned parallel flow burner at present, though the breeze airflow range of its ejection is far away, but the capacity of returns of high-temperature flue gas is few, cause catch fire late, flame is low, the furnace flame degree of filling is also relatively poor, and because coal dust and Air mixing are not good, so that coal dust firing is insufficient in the burner hearth, coal consumption is big, when stove, kiln leak out greatly, what spray is general breeze airflow, can not form thermal-flame, particularly more obvious on the cement plant dryer hot-blast stove.

" silicate industry thermal process and equipment) " first volume of compiling by Wuhan Building Material Polytechinc College etc., on the 138th page of the second impression in the December nineteen eighty-three version, once introduced vortex burner, the structural representation that reflects on this book is a kind of adjustable vortex burner of secondary wind rotation, and it is decided airduct, diffusing cone etc. and constituted by primary air intake pipe, the crust of weathering, secondary wind shell, impeller, adjustment impeller pull bar, a wind; Because the expansion of the eddy flow of this burner secondary wind makes flame full level in burner hearth better, and pass through to adjust the intensity that the impeller pull bar is adjusted the position-adjustable secondary wind eddy flow of impeller, the adjustment that helps burning; But, the primary air intake pipe of this burner and a crust of weathering are the direct air intakes of axes intersect, therefore coal dust mixes undesirable with air for the first time, still there is the inadequate problem of burning, and the shape of flame and range to only depend on the adjusting of impeller be limited, be difficult for adapting to different burner hearth and coal, be difficult to the fired state that reaches desirable.

(3) summary of the invention: the purpose of this utility model is to provide a kind of simple in structure, and the life-span is longer, and is easy to adjust, is beneficial to coal dust and fully burns, and adapts to different burner hearths and reaches desirable fired state, improves the bispin streaming coal burner of furnace heat efficiency.

The purpose of this utility model reaches like this: it is specifically to improve according to the adjustable vortex burner of above-mentioned secondary wind rotation to form.Thereby an elegance of the present utility model has produced the rotating flow thigh with tangential air intake, and secondary wind produces the rotating flow thigh by the effect of impeller, promptly becomes bispin streaming air intake, and coal dust is mixed preferably with air.The outer wall of a crust of weathering puts adjustable sleeve pipe simultaneously, and by guiding mechanism adjustable sleeve pipe is seesawed, and the flame diameter that travels forward diminishes, and range is far away, otherwise moves then backward.The airduct of deciding in crust of weathering also is provided with guiding mechanism, adjusts and decides airduct, to cooperate seesawing of adjustable sleeve pipe.Add the position adjustment of impeller in addition, just can adjust the shape and the range of flame preferably, help the abundant burning of coal dust.

The guiding mechanism of described adjustable sleeve pipe is to be connected and composed by a nut and a screw flight of fixedlying connected with adjustable sleeve pipe.

The described guiding mechanism of deciding airduct be by bolt with decide airduct and be threaded and constitute.

Front end of the present utility model also is provided with cooling collar, to improve the life-span of burner.

The utility model helps abundant burning because the bispin streaming air intake that has adopted primary and secondary air all to rotate makes coal dust be mixed preferably with air, makes flame full level in burner hearth better, has improved the thermal efficiency of kiln greatly; Because its flame profile and range are adjusted preferably by the position of adjusting adjustable sleeve pipe, diffusing cone and impeller, make it to adapt to different burner hearths and reach desirable fired state simultaneously.And the utility model has been owing to adopted tangential air intake and impeller guiding air intake and screw guiding mechanism, and it is simple in structure, adjusts very convenient.And because the front end of this burner is provided with cooling collar, so there is the long life-span.

(4) description of drawings:

Fig. 1 is a general structure schematic diagram of the present utility model;

Fig. 2 is the front view of the utility model impeller;

Fig. 3 is the utility model impeller front view A-A cutaway view;

Fig. 4 is the side view of the utility model impeller;

Fig. 5 is a wind inlet schematic diagram of the present utility model.

(5) specific embodiment:

Referring to Fig. 1, this burner includes crust of weathering 2 and secondary wind shell 5.The tangential air inlet is made in the air port of a crust of weathering 2 as shown in Figure 2, the outer wall of a crust of weathering front end puts adjustable sleeve pipe 14, connect movingly, being fixed with nut 16 on the adjustable sleeve pipe is threaded with screw rod 17, when screw rod 17 rotates, promote nut adjustable sleeve pipe 14 is seesawed, (flame diameter that travels forward diminishes, range is far away, otherwise moves then backward); The central interior of a crust of weathering once wind is decided airduct 12, and its rear portion is threaded with bolt 1, and its front end is threaded with diffusing cone 11, and when rotating bolt 1, thereby promotion can be set up airduct and made diffusing cone 11 cooperate adjustable sleeve pipe 14 to seesaw.

The air inlet of secondary wind shell 5 is provided with damper 6, to regulate air quantity, impeller 9 in the form of a ring is housed in its middle part simultaneously, impeller is shown in Fig. 2,3,4, work the use that makes the rotation of secondary wind, nut 8 fixing on the impeller is threaded with screw rod 3, and when screw rod 3 rotated, promotion nut 8 seesawed (when impeller forward the time impeller 9, flame diameter increases, range is shorter, in the time of backward, otherwise then).

The spout end outer wall of secondary wind shell 5 has been manufactured double-deck liquid circulation cooling collar 10, and cooling

fluid turnover pipe

7 and 15 is arranged.

A crust of weathering 2 passes through the ring heart and the secondary wind shell suit of impeller 9, and fixing by cover plate 4 and support plate 13.

The said burner visible structure is simple, and is easy to adjust, is applied to Industrial Stoves, can improve its thermal efficiency greatly.

Claims

1. bispin streaming coal burner, by primary air intake pipe 18, the crust of weathering 2, secondary wind shell 5, diffusing cone 11, an impeller 9, adjust impeller screw 3, a wind is decided airduct 12 and is formed, it is characterized in that: the blast pipe 18 of a wind and 2 tangent connections of the crust of weathering make a wind produce rotation; The airduct 12 of deciding in while crust of weathering 2 is provided with guiding mechanism; And the outer wall cover of a crust of weathering 2 is with adjustable sleeve pipe 14, and adjustable sleeve pipe 14 is provided with guiding mechanism.

2. a kind of bispin streaming coal burner according to claim 1 is characterized in that: the guiding mechanism of deciding to establish on the airduct 12 be by bolt 1 with decide airduct 12 and be threaded and constitute.

3. a kind of bispin streaming coal burner according to claim 1 and 2 is characterized in that: adjustable sleeve pipe 14 set guiding mechanisms are to be threaded by a nut 16 of fixedlying connected with adjustable sleeve pipe 14 and screw rod 17 to constitute.