CN2530162Y - Datachable head of multi-duct powdered coal burner - Google Patents

Abstract

The utility model relates to a detachable head for a multi-duct pulverized coal burner used in rotary cement kilns, characterized in that: the coal air duct head 2 is positioned inside the outer axial-flow air duct head 1 to form an outer axial-flow air channel; the inner axial-flow air duct head 3 is installed in the coal air duct head 2 to form a coal air channel; the inner swirl air duct head 4 is installed in the inner axial-flow air duct head 3 to form an inner axial-flow air channel; the central air duct head 5 is installed in the inner swirl air duct head 4 to form an inner swirl air channel; the central air duct head 5 forms a central air channel; the outer axial-flow air nozzle 10 is buckled on the outer axial-flow air duct head 1; the coal air nozzle 9 is connected to the coal air duct head 2; the inner axial-flow air nozzle 8 is connected to the inner swirl air duct head 4; the cyclone 6 is connected to the central air duct head 5. The utility model can perform excellently with a longer service life, and the spare parts and fittings can be replaced in a flexible and convenient way. When the head portion, which projects into the high-temperature area inside the rotary kiln, malfunctions due to incorrect operation, attrition wear or deformation etc, the utility model can be put back to use only by replacing the disabled components in thread or buckle connection, and the repair cost is low.

Description

The removable head of multiple duct coal burner

(1) technical field: the utility model relates to the coal burner that a kind of cement industry rotary kiln is used, particularly a kind of removable head of multiple duct coal burner.

(2) background technology: in traditional cement production process process, mostly use common single channel coal burner.The black duration and degree of heating of this burner is long, and efficiency of combustion is low, and flame profile can't regulate, and is difficult to satisfy cement rotary kiln calcination of cement clinker good quality and high output, the requirement of low energy consumption.Early eighties, China has introduced the triple channel coal burner from external, and has carried out secondary development in succession, and it is applied in the calcination process of cement rotary kiln grog, has overcome the defective that the single channel coal burner exists basically.But this burner structure complexity costs an arm and a leg, and is difficult to be fit to fully the changeable fuel source of China.The domestic a lot of units of the nineties copy and develop polytype triple channel, four-way coal burner.But it is short that these burner ubiquities service life, and burner head is changed problems such as difficulty.

(3) summary of the invention: the purpose of this utility model is the removable head of a kind of multiple duct coal burner of development, and rotary kiln multi-channel coal powder combustor head is to be made of the heat resisting pipe of five coaxial arrangement and corresponding outlet nozzle thereof.Be called outer axial flow airduct head 1 from outside to inside successively, coal airduct head 2, interior axial flow airduct head 3, interior eddy flow airduct head 4 and central tube head 5.Different gap between each layer sleeve pipe constitutes passage separately, is called center wind duct from inside to outside, inner eddy flow wind duct, inner axial flow wind duct, coal wind duct and outer axial flow wind duct.The leading section of each layer airduct all is equipped with outlet nozzle and the cyclone made by heat resisting steel accordingly.Outwards claim cyclone 6 successively from the lining, interior eddy flow wind nozzle 7, interior axial flow wind nozzle 8, coal wind nozzle 9, outer axial flow wind nozzle 10 holds together flame cover 11.This product structure is reasonable, function admirable, long service life, and burner head is changed flexible.During use, the efficiency of combustion height, coal dust burnout rate height, the flame temperature height, shape is regular, flame profile and adjustable temperature range are wide, can give full play to the superiority of cement rotary kiln production technology, can reduce primary air flow in a large number, reduce fuel consumption into kiln, reduce environmental pollution, it is strong particularly ature of coal to be changed the adaptability that fluctuates, and it can not only burn high-quality bituminous coal, and can also burn anthracite and colm and flammable industrial, house refuse, therefore can reduce the manufacture of cement cost significantly, alleviate transport pressure.

(4) description of drawings:

Fig. 1 is a structure cutaway view of the present utility model.

Fig. 2 is the left view of the utility model Fig. 1.

(5) specific embodiment:

The utility model is described in further detail below in conjunction with accompanying drawing, as shown in Figure 1, 2.The formation of the removable head of multiple duct coal burner is: coal airduct head 2 is contained in the outer axial flow airduct head 1, constitute outer axial flow air channel, interior axial flow airduct head 3 is contained in the coal airduct head 2, constitute coal wind duct, in the axial flow airduct head 3, constitute inner axial flow wind duct in interior eddy flow airduct head 4 is contained in, central air hose head 5 is contained in the interior eddy flow airduct head 4, constitute inner eddy flow wind duct, central air hose head 5 constitutes center wind duct; Outer axial flow wind nozzle 10 is buckled on the outer axial flow airduct head 1, coal wind nozzle 9 usefulness are threaded on the coal airduct head 2, interior axial flow wind nozzle 8 usefulness are threaded on the interior eddy flow airduct head 4, cyclone 7 usefulness are threaded on the central air hose head 5, are equipped with flame cover 11 on the axial flow airduct head 1 outside.The nozzle area of outer axial flow wind outlet and the outlet of eddy flow wind can be done corresponding the adjusting according to the situation of kiln internal combustion and fuel.Each airduct is to connect by screw thread or buckle with being connected of end nozzle and cyclone, rather than directly welding, thereby makes the replacing of nozzle convenient.Eddy flow wind passage, the air that inner axial flow wind duct and outer axial flow wind duct pass through are called wind one time, and what coal wind duct passed through is coal dust and AIR MIXTURES.The effect of cyclone 6 is to make the air by it produce rotation, and produces the recirculating zone, center so that the retention flame; The another one effect is to break up breeze airflow, strengthens coal dust and Air mixing.The outer axial flow wind action of ejection is to draw flame between outer axial flow wind nozzle 10 and the coal wind nozzle 9, and when keeping increasing exogenous wind wind speed and air quantity under the constant situation of eddy flow wind, flame can be elongated.Under the situation that axial flow wind is constant outside keeping, increase eddy flow air quantity and wind speed, can make flame become short and thick.Interior axial flow wind action is to increase a kind of regulating measure.Under the situation that axial flow wind air quantity and wind speed, interior eddy flow wind air quantity and wind speed are constant outside keeping, the air quantity and the wind speed of axial flow wind in increasing, flame can suitably elongate.The multiple duct coal burner stretches into the head in the high-temperature region in the rotary kiln, when losing efficacy as causing because of factors such as operate miss, wearing and tearing, distortion, just can reuse as long as change the head inoperative component that connects with screw thread or buckle, and change flexiblely, use maintenance cost low.

Claims (1)

1, a kind of removable head of multiple duct coal burner, it is characterized in that: coal airduct head (2) is contained in the outer axial flow airduct head (1), constitute outer axial flow wind duct, interior axial flow airduct head (3) is contained in the coal airduct head (2), constitute coal wind duct, interior eddy flow airduct head (4) is contained in the interior axial flow airduct head (3), constitute inner axial flow wind duct, central air hose head (5) is contained in the interior eddy flow airduct head (4), constitute inner eddy flow wind duct, central air hose head (5) constitutes center wind duct; Outer axial flow wind nozzle (10) is buckled on the outer axial flow airduct head (1), coal wind nozzle (9) is connected on the coal airduct head (2), interior axial flow wind nozzle (8) is connected on the interior eddy flow airduct head (4), cyclone (6) is equipped with flame cover (11) on the axial flow airduct head (1) outside connecting on the central air hose head (5).

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