CN2175876Y

CN2175876Y - Fan shape turn-over fire grate

Info

Publication number: CN2175876Y
Application number: CN 93234783
Authority: CN
Inventors: 姚圣聪; 贺文
Original assignee: SHENLI ENERGY-SAVING INDUSTRY Co ZHUHAI ECONOMICAL SPECIAL ZONE
Current assignee: SHENLI ENERGY-SAVING INDUSTRY Co ZHUHAI ECONOMICAL SPECIAL ZONE
Priority date: 1993-09-28
Filing date: 1993-09-28
Publication date: 1994-08-31
Anticipated expiration: 2003-09-28

Abstract

The utility model relates to a fan-shaped turn-over fire grate. The fire grate is composed of a plurality of fire grate segments whose sections are fan-shaped. Each fire grate segment is arranged in the same direction, and a grate axis is arranged on each fire grate segment; the upper surface of each fire grate segment is provided with a ventilation hole, and the lower surface of each fire grate segment is a large hole; the space between the circular arc surface of each fire grate segment and the axis center outer surface of the previous fire grate segment is not larger than 0.01 meters. The utility model not only better reserves the advantages of various existing fire grates, but also has the advantages of wide adaptability of kinds of coal, complete combustion, small environmental pollution, simple structure, easy operation, and long service life of equipment. The utility model is an ideal fan-shaped turn-over fire grate used for a grate-fired furnace.

Description

Fan shape turn-over fire grate

The utility model relates to a kind of coal-fired grate firing equipment, specifically refers to a kind ofly can improve efficiency of combustion, novel fire grate--fan-shaped the stir fire grate wide to coal adaptability.

General grate firing equipment comprises fixed grate at present, traveling-grate stoker, reciprocating grate, underfeed stoker row and double-layer grate etc., though these equipment differ from one another, can satisfy the needs that use under the certain condition, but exist deficiency separately, big as fixed grate consumption coal, contaminated environment, operation labour intensity is big, traveling-grate stoker consumption metal material is big, the coal-fired process coal seam is relative static conditions, its gas permeability is poor, it is insufficient to burn, and be not suitable for the strong coal of coking capacity, reciprocating grate then coal leakage quantity is big, the most advanced and sophisticated position of fire grate segment is burnt out easily, underfeed stoker and double-layer grate then are only applicable to the following boiler of 0.5T/H, and also relatively poor to coal adaptability.

The purpose of this utility model just is to provide a kind of can stirring up and down by fire grate segment, the coal seam is moved and reach loose coal seam, strengthen permeability and broken cinder purpose, have that coal adaptability is wide, sufficient combustion, simple in structure, easy operating and a long fan-shaped fire grate that stirs of service life of equipment.

The purpose of this utility model realizes in the following manner: this fire grate is that fan-shaped fire grate segment is formed by some cross sections, on the every fire grate segment all device the fire grate axle is arranged, this is by the motor of prior art, reduction box and transmission device drive reciprocating, on the upper surface of fire grate segment and lower surface, all have air vent, following wind hole is a macropore, leak ash so that get rid of, the spacing of the axle center outer surface of the arc surface of every fire grate segment and preceding a slice is not more than 0.01 meter, in reciprocating motion, the axle center outer surface of a slice before the lower surface of every fire grate segment is lower than all the time.

Adopt the fan-shaped fire grate that stirs of the present utility model, the advantage that has not only kept existing various fire grates preferably, and can also up and down reciprocatingly stir by fire grate segment, the coal seam is moved and reach loose coal seam, strengthen the purpose of gas permeability of coal seam energy and broken cinder, thus have that coal adaptability is wide, sufficient combustion, environmental pollution are little, simple in structure, easy operating and service life of equipment are long advantage, be a kind of comparatively desirable grate furnace with the fan-shaped fire grate that stirs.

Description of drawings.

Accompanying drawing is a kind of example structure schematic diagram of the present utility model.

Wherein: 1-fire grate axle, 2-fire grate segment, 3-coal bunker, 4-air vent, 5-face arch, 6-coal seam, 7-rear arch, 8-cinder hole, 9-clean-out door, 10-shoot door.

Below in conjunction with accompanying drawing the utility model is further described.

As shown in the figure, the utility model is critical component--the fire grate that belongs in a kind of coal-fired grate firing equipment, this fire grate is that fan-shaped fire grate segment (2) is formed by some cross sections mainly, every fire grate segment is done to arrange in the same way, on it all device fire grate axle (1) is arranged, this is by the motor of prior art, reduction box and transmission device drive reciprocating, on the upper surface of fire grate segment (2) and lower surface, all have air vent (4), the spacing of the arc surface of every fire grate segment (2) and the axle center outer surface of preceding a slice is not more than 0.01 meter, the spacing of present embodiment is 0.003 meter, in reciprocating motion, the axle center outer surface of a slice before the lower surface of every fire grate segment is lower than all the time, the utility model can adopt plain cast iron or heat-resisting cast iron casting to form.In when design, the air vent sectional area on every fire grate segment upper and lower surface designs according to different combustion phases, and section its air vent area in middle primary zone is bigger, and the air vent area of the burned section of front end preheating section and rear portion is less.

This fan-shaped fire grate that stirs, by some cross sections is that fan-shaped fire grate segment (2) is formed, every fire grate segment is done to arrange in the same way, on it all device fire grate axle (1) is arranged, the fire grate segment upper surface has air vent (4), lower surface has a macropore, the spacing of the axle center outer surface of the arc surface of every fire grate segment and preceding a slice is not more than 0.01 meter, air vent sectional area difference on every fire grate segment upper surface, middle primary zone its air vent area of section is greater than the air vent area of the burned section of front end preheating section and rear portion, in the reciprocating motion of fire grate segment, the axle center outer surface of a slice before the lower surface of every fire grate segment is lower than all the time.

When work, fire grate axle (1) is at motor, the drive of reduction box and transmission device is rotated down, driving fire grate segment (2) simultaneously up and down reciprocatingly stirs, and will constantly roll mobile forward by the coal that coal bunker (3) falls, burning, in this process, the needed air that burns enters air compartment below the fire grate by air inlet, air vent on fire grate segment (4) enters coal combustion again, the cinder that has burnt falls into cinder hole (8), and regularly remove by clean-out door (9), the tiny lime-ash that leaks down in the gap by fire grate segment during operation is then removed by the shoot door under the fire grate (10).Like this, coal seam (6) is under the suitable cooperation of boiler face arch (5) and rear arch (7), burning will be successfully finish preheating, drying on fire grate, catch fire, burn and burn each combustion phases such as cinder slagging, thereby reach sufficient combustion, the purpose that energy-saving and environmental protection are effective, coal adaptability is wide, rational in infrastructure, easy to operate.

Claims

1, a kind of fan-shaped fire grate of forming by fire grate segment and relevant actuating unit that stirs, it is characterized in that this fire grate is that fan-shaped fire grate segment (2) is formed by some cross sections, every fire grate segment is done to arrange in the same way, on it all device fire grate axle (1) is arranged, the fire grate segment upper surface has air vent (4), lower surface has a macropore, and the spacing of the axle center outer surface of the arc surface of every fire grate segment and preceding a slice is not more than 0.01 meter.

2, the fan-shaped fire grate that stirs according to claim 1 is characterized in that every air vent sectional area difference on the fire grate segment upper surface, and section its air vent area in middle primary zone is greater than the air vent area of the burned section of front end preheating section and rear portion.

3, the fan-shaped fire grate that stirs according to claim 1 is characterized in that in the reciprocating motion of fire grate segment, the axle center outer surface of a slice before the lower surface of every fire grate segment is lower than all the time.