CN2038195U

CN2038195U - Energy saving combustion-supporting device for coal dust combusting

Info

Publication number: CN2038195U
Application number: CN 88212595
Authority: CN
Inventors: 刘见谷; 梁之安
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-05-15
Filing date: 1988-05-15
Publication date: 1989-05-24

Abstract

The utility model discloses an energy saving combustion-supporting device for coal dust combusting for the usage of an industrial furnace, which is additionally provided with a mixing new apparatus of changing air intake mixing coal on the base of a coal-powder pipe of an original industrial furnace. The energy saving combustion-supporting device for coal dust combusting makes coal powder in the coal-powder pipe be mixed homogeneously and has sufficient oxygen to accelerate combustion for improving the stove temperature. The purposes of reducing coal consumption and improving large amount are reached. The energy saving combustion-supporting device for coal dust combusting is suitable for various industrial furnaces of large and medium types, smelting and the production of cement kiln.

Description

Energy saving combustion-supporting device for coal dust combusting

The utility model relates to the energy-conservation auxiliary combustion equipment of a kind of novel industrial furnace coal dust firing.

Well-known big industrial furnace, smelting, production cement, all adopt coal dust to make fuel, coal dust will fully burn in stove must possess two conditions, and a coal dust must reach the burning point temperature.Two will have sufficient oxygen.Industrial furnace burning has at present all been set up and has been seen fiery operating post, observes flame.The quality of pulverized coal flame then is the key of operation, and coal dust firing then is a suitable complex process, and it is subjected to many factor affecting.For example: cement kiln is gone into kiln coal ash part, fugitive constituent, fineness, moisture content, temperature; Combustion airduct primary air flow, wind-warm syndrome, wind speed, blast; The uniformity coefficients that the uniformity coefficient that coal airduct secondary air flow, wind-warm syndrome, wind speed, blast, material move in kiln, wind secondary wind mix with coal dust etc. briefly, are the burnings of coal dust and Air mixing.Shown in figure one: be exactly that the cement kiln coal dust is gone into kiln process rough schematic; Pulverized Coal Bin (1), coal dust reamer (2), coal dust (3), coal airduct (4), air blast (5), Dayao (6), flame (7).When Pulverized Coal Bin (1) input coal dust, coal dust reamer (2) is involved in coal pipe (4) with coal dust, then, air blast (5) stirs coal dust, through once, secondary wind blows into the kiln internal combustion with coal dust, wherein the uniformity coefficient of oxygen around coal dust is different, influence the kiln internal combustion, then some places are then not enough, even wretched insufficiency, this deficiency is to be easy to generate the mechanochemistry imperfect combustion most, and loss fuel and heat energy are not given full play to usefulness.

The purpose of this utility model designs a kind of new coal dust firing power burner at above-mentioned defective, reaches energy-conservation combustion-supporting purpose.As described in accompanying drawing two, on the basis that is device.Set up an air compressor, air compressor produces high wind and compressed air wind is blown into coal pipe (title tertiary air) equably stirs with former primary and secondary air of former coal pipe and coal dust by exhaust duct, steam vent, changing wind and coal like this mixes degree and makes the coal dust ambient oxygen even, quicken coal dust firing, give full play to the thermal efficiency, reduce fuel consumption, reach energy-conservation purpose.

Fig. 1 is a cement kiln coal burner schematic diagram in the prior art, and coal dust (3) enters coal airduct (4) by Pulverized Coal Bin (1) through coal reamer (2) and by air blast (5) blowing coal dust entered industrial furnace (6) generation flame (7) again.

Fig. 2 is the energy-conservation combustion-supporting schematic diagram of the utility model coal dust firing, when coal dust (3) enters coal airduct (4) by Pulverized Coal Bin (1) through coal reamer (2), at the wind that former air blast (5) bloats coal dust (3) being discharged wind high wind with combustion-supporting steam vent (13) in the coal airduct is carried meets, fully stir, promote coal dust in the industry kiln internal combustion.

The utility model energy saving combustion-supporting device for coal dust combusting, it is made up of air compressor (8), rubber tube (9), control valve (10), draft gauge (11), exhaust duct (12), steam vent (13), coal airduct (4), industrial furnace (6), flame (7) etc. When air compressor (8) was worked, compress wind was by rubber tube (9), control valve (10), draft gauge (11), exhaust duct (12), steam vent (13). Steam vent (13) is installed in the middle of the coal pipe (4), be input into coal dust with original device, wind, a Secondary Air and set up air compressor and produce tertiary air and stir, improve the uniformity coefficient that wind and coal mix, make that coal dust is all even a sufficient oxygen, accelerate burning and improve furnace temperature and reach the furnace temperature stablizing effect, make like this coal stove can also burning inferior coal, the bituminous coal that volatile matter is low. The utility model is practical cement kiln not only, but also the burning of practical various industrial furnace coal powders, for industrial furnace (coal tiger) energy-saving props up, new approach is opened up in volume increase.

The energy-conservation combustion-supporting of the utility model coal dust firing, exhaust duct (12), steam vent (13) are installed in the middle of the coal pipe (4), a large amount of pulverized coal particles constantly clash into, rub and damage blast pipe easily, require to select for use antifriction and the higher high-quality steel of intensity to make, and increase the service life.Exhaust duct (12) air draft one end bores steam vent (13), 3～4 millimeters in aperture, and the axial distance in hole is 20～25 millimeters, the number in hole determines according to capacity, the end of exhaust duct is sealing shape, and terminal is 0.7 meter from the discharge place, and steam vent (13) tube length is 50～80 millimeters.

The energy-conservation combustion-supporting of the utility model coal dust firing adopts air compressor to make combustion-supporting, is suitable for multiple industrial furnace, simple structure, easy to make, cost is low, small investment, instant effect, distinguishing feature are to improve the combustion zone temperature, improve the kiln heat force intensity, reduce coal consumption, improve output, can economize on coal 4%～8%, improve output 1%～4% and reach a volume increase joint purpose.

Claims

1, the energy-conservation combustion-supporting of a kind of used for industrial furnace coal dust firing is made up of air compressor [8], rubber tube [9], control valve [10], draft gauge [11], exhaust duct [12], steam vent [13], coal pipe [4] etc.Its feature: on the basis of former coal dust industrial furnace device, set up an air compressor [8], air is discharged (tertiary air) by rubber belt [9]-control valve [10]-draft gauge [11]-exhaust duct [12]-steam vent [13].Steam vent [13] is installed in the middle of the coal pipe [4] and original device, imports a wind secondary of coal dust wind and mixes and stirs the uniformity coefficient that coal mixes.

2, coal dust firing energy-saving appliance according to claim 1, its feature: exhaust duct (12), steam vent (13) the higher high-quality steel of intensity, be drilled with steam vent (13) at exhaust duct (12) air draft one end, the aperture is 3～4 millimeters, 20～25 millimeters of the axial distances in hole, the end of blast pipe is sealing shape, and terminal is 0.7 meter from the discharge place.Steam vent pipe length is 50～80 millimeters.