CN2577124Y

CN2577124Y - Bispin five-duct fine coal burner for rotary furnace

Info

Publication number: CN2577124Y
Application number: CN 02284160
Authority: CN
Inventors: 王姝森
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-11-10
Filing date: 2002-11-10
Publication date: 2003-10-01
Anticipated expiration: 2012-11-10

Abstract

The utility model relates to a double rotation coal powder burner with five wind channels for a rotary kiln, which is characterized in that the utility model is composed of five steel pipes which are arranged in the same shaft, outlet nozzles which are corresponding to the steel pipes, and a valve which is used for adjusting wind quantity and wind speed. An outer rotational flow wind channel is composed of an outer wind groove of an outer rotational flow wind pipe, an inner wind groove of the outer rotational flow wind pipe and a sleeve of the outer wind groove, wherein, the outer rotational flow wind channel is communicated with the channel of the outer rotational flow wind pipe. An inner rotational flow wind channel is composed of a swirl nozzle and the head part of an inner rotational flow wind pipe, and the inner rotational flow wind channel is communicated with the channel of the inner rotational flow wind pipe. The angle range of the helical angle of the inner wind groove and the outer wind groove of the outer rotational flow wind channel is 1-35 DEG, and the angle range of the helical angle of the swirl nozzle of the inner rotational flow wind channel is 15-45 DEG. The utility model has the advantages of high combustion efficiency, high sufficient combustion efficiency of the coal powder, and wide adjustable range of flame shape and temperature; wind quantity which enters the kiln by one time can be largely reduced, fuel consumption can be reduced, and environmental pollution can be reduced; especially, the adaptability for variation and fluctuation of coal quality is strong. The utility model not only can be used for burning high grade coal but also can be used for burning smokeless coal, inferior coal, combustible industrial refuse and domestic refuse.

Description

Rotary kiln bispin tendencies road coal burner

(1) technical field: the utility model relates to a kind of burning clinker of cement, aluminium oxide calcining, X-AWO ₃The coal burner that technical process such as roasting, the oven dry of heavy metal ore deposit are used, particularly a kind of rotary kiln bispin tendencies road coal burner

(2) background technology: rotary kiln is in traditional production process, mostly use common, simple single air channel, two air channel, three air channel coal burners, the burner of these kinds, black duration and degree of heating is long, efficiency of combustion is low, and flame profile and temperature can't regulate control, is difficult to be fit to coal resources in China geographical distribution inequality, the not corresponding national conditions of industrial layout and ature of coal quality; Even four-channel coal burner, singly revolve the also phenomenon of ubiquity easy burn-out kliner coating of tendencies road coal burner.

(3) summary of the invention: the purpose of this utility model is a kind of rotary kiln of development bispin tendencies road coal burner, this product is by the steel pipe of five coaxial arrangement and exports head accordingly, nozzle and be used to regulate air quantity, the used control valve of wind speed constitutes: burner head 1, hanger 2, outer eddy flow wind control valve 3, outer eddy flow wind pressure table 4, outer eddy flow wind nozzle area is adjusted screw rod 5, interior axial flow wind control valve 6, interior axial flow wind pressure table 7, interior eddy flow wind control valve 8, interior eddy flow wind pressure table 9, interior eddy flow wind discharge area is adjusted screw rod 10, central air hose telescopic joint 11, label 12, clean wind pipe telescopic joint 13, clean wind pipe 14, center wind control valve 15, clean wind pipe joint 16, coal air channel inspection door 17, coal wind inlet pipe 18, cyclone 19, interior eddy flow airduct head 20, interior axial flow airduct head 21, outer eddy flow airduct outer air groove 22, hold together flame cover 23, wind groove 24 in the outer eddy flow airduct, outer air groove cover 25, coal airduct head 26,

support key

27,28,29, outer eddy flow airduct head 30, outer eddy flow airduct 31, coal airduct 32, interior axial flow airduct 33, interior eddy flow airduct 34, central air hose 35.This product is to constitute separately passage by the different gap between each layer sleeve.Be called from outside to inside: outer eddy flow airduct passage, coal airduct passage, interior axial flow airduct passage, interior eddy flow airduct passage, central air hose passage.The leading section of each layer airduct all is equipped with corresponding heat resisting steel outlet nozzle or cyclone, and wind groove 24, outer air groove cover 25 constitute outer swirling wind channel in outer eddy flow airduct outer air groove 22, the outer eddy flow airduct, and outer swirling wind channel and outer eddy flow airduct passage communicate; Eddy flow air channel in cyclone 19, interior eddy flow airduct head 20 constitute, interior eddy flow air channel and interior eddy flow airduct passage communicate.The angular range of the helical angle of the inside and outside wind groove of outer swirling wind channel is 1 °-35 °, and the angular range of the helical angle of interior eddy flow air channel cyclone is 15 °-45 °.The utility model except have long service life, rational in infrastructure, efficiency of combustion is high, coal dust burnout rate height, flame temperature height, flame profile and temperature regulating range is wide, head adopts buckle or be threaded, change consumable accessory and be equipped with that part is more flexible, to be suitable for the ature of coal coal wide, can be sharp useless and reduce the advantage such as environmental pollution, because of exogenous wind adopts the eddy flow form, strengthened the ability that coal burner entrainments high temperature secondary wind and high-temperature flue gas, therefore can further save energy and reduce the cost, be more suitable on the relevant industries technology specification requirement coal burner.

(4) description of drawings:

Fig. 1 is a structural front view of the present utility model

Fig. 2 is a structure vertical view of the present utility model

Fig. 3 is the structure cutaway view of the utility model head

Fig. 4 is the left view of the utility model Fig. 3

(5) specific embodiment:

The utility model is described in further detail below in conjunction with accompanying drawing.Shown in Fig. 1,2,3,4, rotary kiln with the formation of bispin tendencies road coal burner is: coal airduct 32 is assemblied in the outer eddy flow airduct 31, constitutes outer eddy flow airduct passage; Interior axial flow airduct 33 is assemblied in the coal airduct 32, constitutes coal airduct passage; In being assemblied in, interior eddy flow airduct 34 in the axial flow airduct 33, constitutes interior axial flow airduct passage; In being assemblied in, central air hose 35 in the eddy flow airduct 34, constitutes interior eddy flow airduct passage; Central air hose 35 constitutes the central air hose passage.Central air hose passage, interior eddy flow airduct passage, interior axial flow airduct passage, outer eddy flow airduct passage, coal airduct passage, the air that passes through is a wind.What pass through in the coal airduct passage is that the high concentration that coal dust and compressed air mix contains the coal gas body.Outer eddy flow airduct head 30 usefulness buckles are connected on the outer eddy flow airduct 31; Outer air groove cover 25 usefulness buckles are connected on the outer eddy flow airduct head 30.Wind groove 24 is installed in the outer air groove cover 25 in the outer eddy flow airduct; Holding together petticoat pipe 23 is installed on the outer air groove cover 25.Outer eddy flow airduct outer air groove 22 usefulness are threaded on the coal airduct head 26.Coal airduct head 26 usefulness are threaded on the coal airduct 32; Interior axial flow airduct head 21 usefulness are threaded on the interior axial flow airduct 33; On the axial flow airduct 34, cyclone 19 usefulness were threaded on the central air hose 35 in interior eddy flow airduct head 20 usefulness were threaded in; Thereby the replacing that makes nozzle is convenient rapidly.At interior eddy flow airduct head 20 and interior axial flow airduct head 21, be equipped with respectively between interior axial flow airduct head 21 and coal airduct head 26 and coal airduct head 26 and the outer eddy flow airduct head 30 and

support key

27,28,29, the effect of supporting

key

27,28,29 is that outer eddy flow wind passage of assurance and coal wind duct are not yielding.The effect of holding together flame cover 23 is not allow flame disperse too

early.Control valve

3,6,8 and 15 is connected outer eddy flow airduct 31, interior axial flow airduct 33, interior eddy flow airduct 34 and central air hose 35 respectively.The leading section of each layer airduct all is equipped with corresponding heat resisting steel outlet nozzle or cyclone, and wind groove 24, outer air groove cover 25 constitute outer swirling wind channel in outer eddy flow airduct outer air groove 22, the outer eddy flow airduct, and outer swirling wind channel and outer eddy flow airduct passage communicate; Eddy flow air channel in cyclone 19, interior eddy flow airduct head 20 constitute, interior eddy flow air channel and interior eddy flow airduct passage communicate.From an effect of the interior eddy flow wind of inner eddy flow wind duct (cyclone 19, interior eddy flow airduct head 20 constitutes inner eddy flow wind ducts) ejection is recirculating zone, generation center so that the retention flame, and another effect is to break up breeze airflow, strengthens coal dust and Air mixing.From the outer eddy flow wind action of outer eddy flow wind passage (outer eddy flow airduct outer air groove 22 and outside constitute outer eddy flow wind passage in the eddy flow airduct between the wind groove 24) ejection is to draw flame in, entrainment high temperature secondary wind and high-temperature flue gas on every side, the maintenance length of flame and intensity; under the constant situation of the wind speed air quantity of interior eddy flow wind; increase the wind speed and the air quantity of outer eddy flow wind, flame will increase.Simultaneously also flame around and root entrainment a large amount of high temperature secondary wind and high-temperature flue gas.Because entrainmenting in a large number of high temperature secondary wind and high-temperature flue gas, improve and improve flame root and environment temperature on every side thereof at once, make breeze airflow, more effectively reduced primary air flow simultaneously in flame root and burning rapidly on every side thereof, shorten black duration and degree of heating, cut down the consumption of energy and reduce NO in the combustion process _xGeneration.Under the situation that the air quantity wind speed of eddy flow wind is constant, the air quantity and the wind speed of eddy flow wind in increasing can make flame become short and thick strong outside.Interior axial flow wind action is to increase a kind of regulating measure, and can prevent that flame from dispersing, and under the situation that eddy flow wind, interior eddy flow wind air quantity and wind speed are constant, the air quantity and the wind speed of axial flow wind can elongate flame in increasing outside.The center wind action is, fast when the air velocity of burner ejection, the black duration and degree of heating of flame is too short, when root temperature is too high, suitably increase the center air quantity, can reduce the backflow negative pressure in burner nozzle centre, reduce the flame root temperature, prolong the service life of burner head.

Claims

1, a kind of rotary kiln bispin tendencies road coal burner, coal airduct (32) is assemblied in the outer eddy flow airduct (31), constitutes outer eddy flow airduct passage; Interior axial flow airduct (33) is assemblied in the coal airduct (32), constitutes coal airduct passage; In being assemblied in, interior eddy flow airduct (34) in the axial flow airduct (33), constitutes interior axial flow airduct passage; In being assemblied in, central air hose (35) in the eddy flow airduct (34), constitutes interior eddy flow airduct passage; Central air hose (35) constitutes the central air hose passage; Outer eddy flow airduct head (30) is buckled on the outer eddy flow airduct (31); Outer air groove cover (25) is buckled on the outer eddy flow airduct head (30); Wind groove (24) is installed in the outer air groove cover (25) in the outer eddy flow airduct; Holding together petticoat pipe (23) is installed on the outer air groove cover (25); Outer eddy flow airduct outer air groove (22) is by being threaded on the coal airduct head (26); Coal airduct head (26) is with being threaded on the coal airduct (32); Interior axial flow airduct head (21) is with on the axial flow airduct (33) in being threaded in; Interior eddy flow airduct head (20) is with on the axial flow airduct (34) in being threaded in; Cyclone (19) is with being threaded on the central air hose (35); At interior eddy flow airduct head (20) and interior axial flow airduct head (21), be equipped with respectively between interior axial flow airduct head (21) and coal airduct head (26) and coal airduct head (26) and the outer eddy flow airduct head (30) and support key (27), (28), (29); Control valve (3), (6), (8) are connected outer eddy flow airduct (31), interior axial flow airduct (33), interior eddy flow airduct (34) and central air hose (35) respectively with (15), it is characterized in that: wind groove (24), outer air groove cover (25) constitute outer swirling wind channel in outer eddy flow airduct outer air groove (22), the outer eddy flow airduct, and outer swirling wind channel and outer eddy flow airduct passage communicate; Eddy flow air channel in cyclone (19), interior eddy flow airduct head (20) constitute, interior eddy flow air channel and interior eddy flow airduct passage communicate.

2, rotary kiln according to claim 1 bispin tendencies road coal burner, it is characterized in that: the angular range of the helical angle of the inside and outside wind groove of outer swirling wind channel is 1 °-35 °, and the angular range of the helical angle of interior eddy flow air channel cyclone is 15 °-45 °.