CN2129378Y

CN2129378Y - Compound-burning boiler with chain grate added coal dust

Info

Publication number: CN2129378Y
Application number: CN 92201886
Authority: CN
Inventors: 潘名麟
Original assignee: HAERBIN SPACE HEAT-ACDDITION ENGINEERING DESIGN INST
Current assignee: HAERBIN SPACE HEAT-ACDDITION ENGINEERING DESIGN INST
Priority date: 1992-02-09
Filing date: 1992-02-09
Publication date: 1993-04-07
Anticipated expiration: 2002-02-09

Abstract

The utility model provides a compound-burning boiler with chain grate added coal dust. The boilers which is used at present exists the following problems: coal is ignited with single side in the boilers, the fire conditions are not good, the classes of the coal which are suitable for the boilers are little. The utility model adopts compound burning of grates and powder dust, the coal is sent to the grates through a pipe, another pipe is connected with a coal feeder, the coal feeder is connected with a coal mill, the coal mill is connected with a separator, the separator is connected with a burner, and the burner adopts a certain way to be disposed. The dry of the coal adopts the high temperature flue gas, the remaining flue gas are expelled from the flues through a convection pipe, a coal economizer and a preheater, then goes through the hot wind of the preheater to the grates all the way and goes directly to the burner.

Description

Compound-burning boiler with chain grate added coal dust

The utility model relates to a kind of chain grate boiler, and particularly a kind of traveling-grate stoker adds the coal dust combined combustion boiler.

Now used boiler is most widely used with chain grate boiler, the major defect that this mode exists is: coal single face in stove ignites, and ignition condition is bad, and coal adaptability is poor, usually need use the fugitive constituent height, the high-quality bituminous coal that caloric value is big is when the coal variation, when ature of coal descends, the boiler operatiopn operating mode promptly can worsen rapidly, cause exerting oneself and the thermal efficiency reduces significantly, even because of furnace temperature is too low, coal is difficult to catch fire and can't moves; Another kind is the combustion mode of combusting coal fines, and the main deficiency of this mode is: equipment is thrown greatly, load adaptability is poor, be only applicable to greatly, and medium-sized boiler, generally inapplicable on miniature boiler.

The purpose of this utility model provides a kind of simple in structure, and equipment investment is little, and is low to the ature of coal requirement, burns the combined combustion boiler that the thermal efficiency is high.

The purpose of this utility model is achieved in that the coal one tunnel in the coal bunker delivers on the fire grate, one the tunnel enters burner hearth through feeder, coal pulverizer, mill separator and the burner that is arranged on the hearth wall, burner has vortex burner or parallel flow burner, and vortex burner is both walls symmetric arrangement or interlaced arrangement; Straight formula burner is that the front wall backlash is arranged or four jiaos of layouts, coal is to adopt high temperature flue gas drying, high-temperature flue gas is taken from upper furnace, directly lead to coal pulverizer by smoke extracting tube, wind from air blast is delivered to fire grate and burner through giving hot device, the flue gas that combustion process produced is through convection tube, and economizer, air give hot device and enter flue.

The utility model has the advantages that: simple in structure, equipment investment is few, to ature of coal require low, combustion efficiency good, the thermal efficiency is high.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the vortex burner both walls layout drawing that liquidates.

Fig. 3 is the A-A cutaway view of Fig. 2

Fig. 4 is straight formula burner front wall layout drawing.

Fig. 5 is the A-A cutaway view of Fig. 4.

Fig. 6 is four jiaos of layout drawings of straight formula burner.

Fig. 7 is Fig. 6 A-A cutaway view.

Embodiment:

A coal bunker 1 is arranged in the side of boiler 7, two mouths are arranged below it, a mouth is delivered coal on the fire grate 6, another mouth feeder 2 of delivering coal, by feeder 2 to blower mill 3, arrive rough coal separator 4 then, after pulverized coal channel 5 to burner 6, blower mill 3 promptly has the effect of coal-grinding, produce certain pressure again, be used for overcoming pulverized coal channel 5 and the resistance that is arranged in the burner 6 on the hearth wall, the burner 6 that is adopted has spiral-flow type and single flow, the arrangement of turbulent burner 6 is symmetric arrangement or interlaced arrangement on both walls, and the layout of parallel flow burner 6 is front wall backlash layout or four jiaos of layouts, and this burner 6 at the middle part of front wall to next angle arrange or on two angles of front wall to next angle, and form the layout of an angle of cut, the below that coal dust is sprayed onto rear arch is lighted by the coal on the fire grate by the coal dust of these burner 6 ejections, the flue gas that coal combustion produced is through convection tube 17, economizer 12, pocket enters back-end ductwork after giving hot device 9, enter chimney through deduster 13 by air-introduced machine 15 then, the coal dust ash part of after-flame is discharged through deduster 13 with flue gas, remainder drops on the fire grate grate, discharge simultaneously with the lime-ash on the fire grate, the air of hot device 9 is next to divide two-way to air blast 14 through the air that air give after hot device 9 gives heat and air gives, one the tunnel through fire grate ajutage 10 to fire grate wind, the burner ajutage 11 of leading up to links to each other with burner 6, and the drying of coal is to adopt the high-temperature flue gas in the burner hearth to realize, high-temperature flue gas orientation burner hearth, link to each other with blower mill 3 by smoke extracting tube 8, and with the burner hearth joint mouth of smoking is arranged at smoke exhaust pipe 8, be used for regulating flue-gas temperature.

Claims

1, a kind of traveling-grate stoker adds the coal dust combined combustion boiler, and it comprises body of heater, fire grate rotating mechanism, and smoke evacuation system is characterized in that: be furnished with burner 6 on the hearth wall of chain furnace.

2, a kind of traveling-grate stoker according to claim 1 adds the coal dust combined combustion boiler, it is characterized in that: hearth wall forward spin flow burner 6 is to arrange layout in both walls symmetric arrangement or friendship.

3, a kind of traveling-grate stoker according to claim 1 adds the coal dust combined combustion boiler, it is characterized in that: parallel flow burner 6 is that the front wall backlash is arranged or four jiaos of layouts.

4, a kind of traveling-grate stoker according to claim 1 adds the coal dust combined combustion boiler, it is characterized in that: arrange that to next angle one sprays to the parallel flow burner 6 below the rear arch or respectively arranges one to next angle on two angles of front wall at the middle part of front wall, and form the parallel flow burner 6 that sprays to the rear arch below of an angle of cut.