CN201706487U

CN201706487U - Anthracite powdered coal burner for a rotary kiln

Info

Publication number: CN201706487U
Application number: CN2010202108446U
Authority: CN
Inventors: 凌中亚; 蔡长明; 吴敬
Original assignee: XIANGFAN DALI ELECTROMECHANICAL TECHNOLOGY Co Ltd
Current assignee: Xiangyang Dali Electromechanical Technology Co.,Ltd.; Xiangyang Zhonghe M&e Technology Co ltd
Priority date: 2010-05-22
Filing date: 2010-05-22
Publication date: 2011-01-12
Anticipated expiration: 2020-05-22

Abstract

The name of the utility model is an anthracite pulverized coal burner for a rotary kiln, which relates to a burner for a rotary kiln which uses anthracite coal pulverized as fuel. It mainly solves the problem that the current pulverized coal burner used in the rotary kiln can only burn bituminous coal and has high cost. The nozzle head of the burner of the utility model is provided with five passages of axial flow, swirling wind, coal wind, central wind and ignition from the outside to the inside in turn. The outlets of the five passages are slope outlets. There is a central air end cover plate, and the coal powder inner nozzle is installed at the outlet of the coal air passage, and the conical cyclone, the swirl air outer cylinder and the axial air outer cylinder are respectively installed at the outlet of the swirl air and axial flow air passages , the outlet of the outer cylinder of the axial flow wind is provided with a flame hood; the burner body is respectively equipped with axial flow wind, swirl wind and coal air outlet cross-section adjustment devices, and a center air end cover plate adjustment device; the burner body is equipped with Equipped with combustion air duct. The utility model can utilize anthracite and low-quality coal, has sufficient combustion, saves energy and reduces consumption.

Description

Rotary kiln anthracite coal burner

Technical field

The utility model relates to a kind of rotary kiln, relates to a kind of rotary kiln burner that acts as a fuel with the anthracite coal dust specifically.

Background technology

At present, rotary kiln is a lot of with the burner fuel kind, as coal dust, natural gas, coke-stove gas, blast furnace gas or the like.The used coal dust of the used coal burner of rotary kiln is generally bituminous coal.Because the coal resource skewness of China weighing apparatus, and anthracite occupies bigger proportion in the coal resource, and price is low than bituminous coal, and domestic rotary kiln burner commonly used is can only the bituminous coal coal dust can not burn anthracite coal dust so cost height at present.

Summary of the invention

The purpose of the present utility model is, a kind of rotary kiln burner that uses the anthracite coal dust to act as a fuel that proposes at above-mentioned deficiency.

Technical solution of the present utility model is: rotary kiln with the feature of anthracite coal burner is: 1. the nozzle head of burner is provided with axial flow wind from outside to inside successively, eddy flow wind, coal wind, center wind and five passage A of igniting, B, C, D, E, the outlet of five passages is inclined exit, in the ignition channel E centering wind passage D, the exit of central passage D is provided with center wind end casing, the exit of coal wind duct C is provided with shower nozzle in the coal dust, eddy flow wind and axial flow wind channel B, the exit of A is respectively equipped with swirl cone, eddy flow wind urceolus and axial flow wind urceolus, the exit in the axial flow wind urceolus outside is provided with the flame cover; 2. on burner body, be respectively equipped with axial flow wind, eddy flow wind and coal wind outlet adjusting device, and center wind end casing adjusting device; 3. on burner body, be provided with combustion-supporting airduct.

Be connected with the atomizer conduit on the center wind end casing in the exit of the center wind duct D described in the technical solution of the present utility model, shower nozzle connects with pipe employing groove mode in the coal wind in the coal dust of coal wind duct C; The cyclone of eddy flow wind channel B adopts the groove mode to connect with the coal dust outer tube; The eddy flow wind urceolus of axial flow wind passage A adopts the groove formula to connect with eddy flow wind outer tube, and the axial flow wind urceolus of axial flow wind passage A adopts flange to connect with outer airduct; Axial flow wind urceolus adopts trapezoidal thread to connect with holding together the flame cover, and the port of export of shower nozzle, swirl cone, eddy flow wind urceolus and axial flow wind urceolus is inclined exit in the coal dust.

The cyclone of the burner nozzle head described in the technical solution of the present utility model is a swirl cone that is processed with spiral grooves outside on the outer surface of cone, and the head cone diameter of swirl cone dwindles gradually along airflow direction.

Axial flow wind described in the technical solution of the present utility model and eddy flow wind outlet adjuster are FlexbleJoints that has four flanges, two flanges are separately fixed at the bellows both sides and connect with sylphon seal, other two flanges are located at the outside of above-mentioned two flanges respectively, by two parallel longitudinal ends that are connected in four flanges of screw rod; Axial flow wind cross section outlet regulating device is that two flanges outside the compensator are connected with outer airduct and eddy flow wind outer tube respectively; Eddy flow wind outlet adjuster is that the flange with the compensator two ends connects with eddy flow wind outer tube and coal wind outer tube respectively.

Coal wind outlet adjusting device described in the technical solution of the present utility model and center wind end casing adjusting device are to be made up of two flanges and two screw rods respectively, two parallel longitudinal ends that are connected in two flanges of screw rod; Two flanges of coal wind outlet adjusting device are separately fixed on coal wind outer tube end and the interior pipe of coal wind; Two flanges of center wind end casing adjusting device are separately fixed at the end face of pipe in the coal wind and an end of atomizer conduit.

The combustion-supporting airduct first line of a couplet described in the technical solution of the present utility model is connected to axial flow airduct, eddy flow airduct and central air hose, and the control valve of butterfly valve type is housed respectively on axial flow airduct, eddy flow airduct and the central air hose; The adjusting compensation arrangement of axial flow airduct and eddy flow airduct is housed on the described combustion-supporting airduct.

Between combustion-supporting airduct described in the technical solution of the present utility model and the coal wind inlet pipeline coal wind compensation wind pipe is housed.

Coal wind inlet pipeline oblique cutting described in the technical solution of the present utility model is gone in the coal wind outer tube, and is welded on the burner, is provided with wear-resistant ceramic sheet protective layer on the coal wind duct wall of oblique cutting mouth.

The utility model has the advantages that:

1, utilize high speed difference, strong eddy flow, the steady flame effect of center wind to make the burned flame regular shape complete, flame stabilization ripple disable, the phenomenon that kiln lining can not occur sweeping; 2, coal dust and wind, secondary wind good mixing, sufficient combustion so can improve the heat force intensity of kiln, reduces the wind ratio one time simultaneously, thereby improves the output of kiln and reduce hear rate; 3, hold together petticoat pipe and form bowl-shape effect and make flame kernel form the recirculating zone, the high-temperature gas that coal dust firing produces has created advantageous conditions for anthracitic burning, makes Flame Temperature Distribution reasonable, and it is smooth to burn; 4, reduce the content of CO and NOX; 5, online easy to adjust, can regulate the sectional area that respectively exports the air channel in operation, thereby change spouting velocity, reach and regulate flame profile and strong and weak purpose; 6, long service life, nozzle has adopted special material, can be anti-oxidant more than 1200 ℃, there is the protection of wear-resistant ceramic layer at the coal powder entrance place, can prevent coal dust washing away burner.

Description of drawings

Fig. 1 is the structural representation of the utility model nozzle head;

Fig. 2 is a structural representation of the present utility model.

The specific embodiment

As Fig. 1, shown in 2: the nozzle head of anthracite coal burner is divided into five passages from outside to inside successively, that is: axial flow wind passage A, eddy flow wind channel B, the coal wind duct C of pulverized coal conveying, center wind duct D and can for the igniting diesel oil ignition channel E, the axial flow wind of this burner nozzle head, eddy flow wind, coal wind discharge area all can be by the adjusting device on the

burner body

25,27,31 online adjustings, be axial flow wind at each combustion air pipeline in addition, the control valve 45 of adjustable rectification campaign amount is housed on eddy flow wind and the central air hose road, 42, the mode of 34, two kinds of adjusting flames has guaranteed the demand of online adjusting flame profile well.

The structure of burner nozzle head as shown in Figure 1, the most inboard is the ignition channel E of fuel, igniter 2 adopts diesel oil atomization device shower nozzle, in the centering wind passage D, the exit of center wind duct D is provided with center wind end casing 3, mode with welding on center wind end casing 3 is connected with atomizer conduit 20, and atomizer conduit 20 is enclosed within the outside of oil pipe 21, pipe 19 organization center wind passage D in atomizer conduit 20 and the coal wind.

The outside of center wind duct D is shower nozzle 1 and the interior shower nozzle screwed pipe 13 of coal dust in the interior pipe 19 of the coal wind of pulverized coal conveying, the coal dust, adopts thread connection between the interior shower nozzle screwed pipe 13 of shower nozzle 1 and coal dust in the coal dust; Adopt the groove welding manner in the coal wind in pipe 19 and the coal dust between the shower nozzle screwed pipe 13.Pipe 19, the interior shower nozzle 1 of coal dust, the interior shower nozzle screwed pipe 13 of coal dust and swirl cone 4, cyclone screwed pipe 11, coal dust outer tube 18 are formed coal wind duct C in the coal wind.

Be provided with swirl cone 4, cyclone screwed pipe 11, coal dust outer tube 18 in the outside of coal wind duct C, cyclone 4 is swirl cones that are processed with spiral grooves on outer surface of cone, the head cone diameter of swirl cone dwindles gradually along airflow direction, adopt thread connection between cyclone 4 and the cyclone screwed pipe 11, adopt the groove welding manner between cyclone screwed pipe 11 and the coal dust outer tube 18.Form eddy flow wind channel B by swirl cone 4, cyclone screwed pipe 11, coal dust outer tube 18 and eddy flow wind urceolus 5, eddy flow wind urceolus screwed pipe 10, eddy flow wind outer tube 17.

The outside of eddy flow wind channel B be provided with flame cover 6, axial flow wind urceolus 7, flange 9 and outside airduct 16; Hold together flame cover 6 and adopt trapezoidal thread to connect with axial flow wind urceolus 7, axial flow wind urceolus 7 adopts Bolt Connection with flange 9, and flange 9 adopts the groove welding manner with outer airduct 16; Hold together flame cover 6, axial flow wind urceolus 7, flange 9, outer airduct 16 and swirl cone 4, cyclone screwed pipe 11, eddy flow wind outer tube 17 composition axial flow wind passage A.

What axial flow wind urceolus 7 and eddy flow wind urceolus 5 adopted in addition is gap machinery fit system; The air outlet of five passages of nozzle head is inclined exit, all has certain inclined-plane on the port of export of shower nozzle 1, swirl cone 4, eddy flow wind urceolus 5, axial flow wind urceolus 7 in the coal dust, is horn-like; Be welded with the dog 14 and the resistant to elevated temperatures material feeding protective layer 15 that waters of increase casting material strength in shower nozzle outermost and outer airduct 16 outsides; in order to protection burner head and the burner airduct that stretches in the kilneye; adopt bolt and rest pad location between each passage airduct, guarantee the axiality and the depth of parallelism of head end during assembling.

As shown in Figure 2, on the body of burner, be fixed with the adjusting

device

25,27,31 of regulating axial flow wind discharge area, eddy flow wind discharge area and coal wind discharge area, and the adjusting device 33 of center wind cover plate 3; Adjusting device 25,27 is FlexbleJoints that have four flanges, two flanges are separately fixed at the bellows both sides, connect with sylphon seal, other two flanges are located at the outside of above-mentioned two flanges respectively, by two parallel longitudinal ends that are connected in four flanges of screw rod; Two flanges in the compensator outside of adjusting device 25 connect with outer airduct 16 and eddy flow wind outer tube 17 respectively, nut by the adjusting screw(rod) two ends, can regulate the spacing between two flanges of the bellows outside, the change of distance drive eddy flow wind outer tube 17 and outer airduct 16 relatively move between two flanges, thereby change the cross section of the band gradient of nozzle head axial

flow wind urceolus

7 and 5 formation of eddy flow wind urceolus, reach the purpose of regulating combustion-supporting axial flow wind muzzle velocity; The flange at the compensator two ends of adjusting device 27 connects with eddy flow wind outer tube 17 and coal wind outer tube 18 respectively, by elongating or shortening of screw rod on the adjustment adjusting device 27, adjust the relative position between eddy flow wind outer tube 17 and the coal wind outer tube 18, reach the sectional area of adjusting the outlet of eddy flow wind, promptly regulate the wind speed of eddy flow wind outlet; Adjusting device 31 is to be made of two flanges and two screw rods, two parallel longitudinal ends that are connected in two flanges of screw rod, a flange is fixed on coal wind outer tube 18 ends, another flange is fixed on manages on 19 in the coal wind, nut on the adjusting screw(rod) two ends, can regulate the relative position between the pipe 19 in coal wind outer tube 18 and the coal wind, thereby change the area of coal wind outlet, coal wind inlet pipeline 30 oblique cutting is at a certain angle gone into coal wind outer tube 18, and be welded on the burner, on the coal wind duct wall of oblique cutting mouth, be provided with the gluing wear-resistant ceramic sheet protective layer of special high temperature, and be provided with coal dust passage abrasion condition observation cover plate 29 at oblique spigot; Adjusting device 33 on the center wind end casing 3 is by two flanges, and parallel two screw rods that are connected in two flange longitudinal ends constitute, a flange is fixed on the section of pipe 19 in the coal wind, another flange is fixed on an end of atomizer conduit 20, nut on the adjusting screw(rod) two ends, can regulate the front and back position of center wind end casing 3 shower nozzle 1 in coal dust, to change the size of flame.On burner, be provided with combustion-supporting airduct 39, combustion-supporting airduct 39 is provided with the axial flow airduct 44 that communicates with axial flow wind passage A, the eddy flow airduct 41 that communicates with eddy flow wind channel B, the central air hose 36 that communicates with center wind duct D is equipped with the control valve 45,42,35 of butterfly valve type respectively on the airduct 44,41,36; Two combustion-supporting airducts are housed on combustion-supporting airduct 39 regulate compensation arrangement 43,40, regulate compensation arrangement by four flanges, two screw rods and bellows are formed, regulate compensation arrangement 43,40 structure and adjusting device 25,27 structure is identical, regulating compensation arrangement 43 is installed on the combustion-supporting airduct 39 between axial flow airduct 44 and the eddy flow airduct 41, regulating compensation arrangement 40 is installed on the combustion-supporting airduct 39 between eddy flow airduct 41 and the coal wind compensation wind pipe 38, regulating axial flow wind outlet, when eddy flow wind outlet and coal wind outlet, can play corresponding combustion-supporting airduct adjusting compensating action on the combustion-supporting airduct 39.

Combustion-supporting airduct 39 and 30 in coal wind inlet pipeline are equipped with a coal wind compensation wind pipe 38, on the coal wind compensation wind pipe 38 valve 34 is housed, its effect is can stop coal wind blower fan only to open the requirement that combustion fan just can satisfy cool burner in stopping the kiln cooling procedure, and the typhoon machine of can opening less like this is to reach purpose of energy saving.

At each combustion air pipeline is the

Pressure gauge

24,26,32 that the 60KPa range is housed on axial flow wind, eddy flow wind and the central air hose road, conveniently know the speed of each channel air air-flow at the scene indirectly, thereby adjust the flame profile of burner better at the burner outlet place.

Claims

1. An anthracite pulverized coal burner for a rotary kiln is characterized in that: ①The nozzle head of the burner is provided with five channels A, B, C, D, E, the exits of the five passages are inclined plane exits, the ignition passage E is placed in the central air passage D, the central air passage D is equipped with a central air end cover plate (3), and the coal air passage The outlet of C is provided with a pulverized coal nozzle (1), and the outlets of the swirl air channel B and the axial flow air channel A are respectively equipped with a conical swirler (4), a swirl air outer cylinder (5) and an axial flow air outlet. The outer cylinder (7), the outlet of the outer cylinder of the axial flow air (7) is provided with a flame cover (6); 25,27,31), and the central air end cover plate regulating device (33); 3. the combustion-supporting air duct (39) is provided on the burner body.

2. The anthracite pulverized coal burner for rotary kiln according to claim 1, characterized in that the central air end cover plate (3) at the outlet of the central air passage D is connected with an atomizer conduit (20) The coal powder inner nozzle (1) of the coal air channel C is connected with the coal air inner pipe (19) by a groove; The swirl wind outer cylinder (5) of the axial flow air channel A and the swirl air outer pipe (17) are connected by groove type, and the axial flow air outer cylinder (7) of the axial flow air passage A is connected to the outer air pipe ( The flange (9) on 16) is connected by bolts; the axial flow air outer cylinder (7) and the flame cover (6) are connected by trapezoidal threads, and the coal powder inner nozzle (1), conical cyclone (4), The outlet ends of the swirl wind outer cylinder (5) and the axial flow wind outer cylinder (7) are inclined-plane outlets.

3. The anthracite pulverized coal burner for a rotary kiln according to claim 1 or 2, characterized in that the conical swirler (4) at the head of the burner nozzle is a spiral swirler (4) that is processed on the outer surface of the outer cone. For the grooved conical swirler, the diameter of the head cone of the conical swirler (4) gradually decreases along the airflow direction.

4. according to claim 1 or 2 described anthracite pulverized coal burners for rotary kilns, it is characterized in that described axial flow air and swirl air outlet section regulator (25, 27) is one with four flanges Bellows compensator, two flanges are respectively fixed on both sides of the bellows and sealed with the bellows, and the other two flanges are respectively set on the outside of the above two flanges, connected in parallel to the diameter of the four flanges through two screws. To the end; the axial flow air section outlet regulator (25) is to connect the two flanges on the outside of the compensator with the outer air pipe (16) and the swirling air outer pipe (17) respectively; the swirling air outlet section regulator (27) It is to connect the flanges at the two ends of the compensator with the swirl wind outer pipe (17) and the coal air outer pipe (18) respectively.

5. according to claim 1 or 2 described anthracite pulverized coal burners for rotary kilns, it is characterized in that the described coal air outlet section adjustment device (31) and the center air end cover plate adjustment device (33) are composed of two The flange and two screw rods are composed of two screw rods connected in parallel to the radial ends of the two flanges; the two flanges of the coal air outlet section adjustment device (31) are respectively fixed on the end of the coal air pipe (18) and the coal air On the air inner pipe (19); two flanges of the central air end cover plate adjusting device (33) are respectively fixed on the end face of the coal air inner pipe (19) and an end of the atomizer conduit (20).

6. The anthracite pulverized coal burner for a rotary kiln according to claim 1, characterized in that said combustion-supporting air duct (39) is connected with an axial flow air duct (44), a swirl air duct (41) and a central Air duct (38), axial flow air duct (44), swirl air duct (41) and central air duct (38) are equipped with butterfly valve-type regulating valves (45, 42, 35) respectively; The adjustment compensation device (43,40) of axial flow air duct (44) and swirl air duct (41) is housed on the pipe (39).

7. The anthracite pulverized coal burner for rotary kiln according to claim 1, characterized in that a coal air compensation air duct (38) is installed between the combustion air duct (39) and the coal air inlet pipe (30) .

8. The anthracite pulverized coal burner for a rotary kiln according to claim 1, characterized in that said coal air inlet pipe (30) is obliquely inserted into the coal air outer pipe (18) and welded on the burner. A protective layer of wear-resistant ceramic sheets is provided on the wall of the coal air channel of the oblique socket. the