CN2037427U

CN2037427U - Automatic coal-feeding device for boiler

Info

Publication number: CN2037427U
Application number: CN 88205945
Authority: CN
Inventors: 沈星燮
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-05-19
Filing date: 1988-05-19
Publication date: 1989-05-10

Abstract

The utility model belongs to a coal-feeding device for minitype mechanical combustion grates and fluidized-bed boilers. The utility model conveys coal to a coal scuttle of a boiler after sieved and crushed through a single rope grab, a cylinder round sifter, a crusher and a dredging conveyor. The utility model can reduce workers' labor intensity, save investment, occupy small area, improve the efficiency of the boiler, reduce environment pollution, allow the fume exhaust to reach the first discharge standard of the maximum permissible Lindeman Black Grade, and save coal by more than 20-30%, being suitable for various minitype boilers.

Description

Automatic coal-feeding device for boiler

The utility model belongs to a kind of small-sized machine combustion grate and boiling boiler coal supply device.

Present small-sized machine combustion grate, chain-grate boiler for example, the stokehold has only the monobucket slide conveyer.Because this conveyer is by hoist engine traction hopper coal directly to be sent in the boiler coal bunker, so this equipment can not solve the strict demand of problem chain-grate boiler has to(for) the granularity of coal.Without screening, that broken system coal burns on fire grate is very unfavorable, because granularity differs, coal dust is embedded between the coal cinder, the coal seam is piled in fact excessively easily, make the heat of burning zone be difficult for passing to the depths, coal seam, the steam that is produced in the dry run is difficult for again coming out simultaneously, so the coal seam catches fire just relatively more difficult.This on the other hand closely knit coal seam can make the flowing resistance of grate increase, and the many places of fine coal are easy to generate burner after being gone by wind, and the local air excess of burner.Directly burning system coal has not only reduced boiler efficiency, and has increased coal consumption and black smoke dirt discharge capacity, makes it environment and is polluted.The coal supply apparatus of using on the boiler of other kind such as fluidized bed furnace though devices such as screening, fragmentation, conveying are arranged, because floor space is big, investment is big and efficient is low etc., is not suitable for China's national situation.In addition, my utility application of declaring " rolling screen coal machine " (applyings date 870604 application number 87208850) in 1987, all at the rear side of screen drum, the area of occupation of land is the same substantially with screen drum for its transmission system, and because the transmission system parts are many, easy break-down.In addition, the structure of sieve aperture is also perfect not to the utmost, stops up easily.

The purpose of this utility model is above-mentioned coal supply device is improved, it is little to design a kind of floor space, small investment, the efficient height is suitable for the automatic coal supply device of boiler to mechanical combustion grate of the strict miniature boiler of coal particle degree and fluidized bed furnace.

Describe formation of the present utility model and operation principle in detail below in conjunction with accompanying drawing.

The automatic coal supply device of boiler be installed in the boiler room stokehold or about.As shown in Figure 1, electric block (4) drives grab bucket (1) the system coal (41) of fixed position is picked up, and transports to rotary screen extension set (6) by i-beam track (5) and locates, and pours coal into the interior screening of screen drum (35) that rotation is tilted.At this moment, the small-particle coal by sieve aperture falls into embedded scraper transporter feeding mouth I (8); The end is slipped in the disintegrating machine (10) under the screen drum (35) that tilts by the large coal particles of sieve aperture.Through disintegrating machine (10) fragmentation, small-particle coal just falls into another feeding mouth II (12) of embedded scraper transporter.The coal that falls into through two feeding mouths is transported to boiler coal bunker (27) by embedded scraper transporter (16).As supply the coal of using of many boilers, as shown in Figure 2, can locate to settle to live in discharging opening I (24) the discharging opening II (25) of embedded scraper transporter and insert door (26) switch as required.

The rotary screen extension set that the utility model adopted as shown in Figure 4, by coal bunker (33), guard shield (34), discharging opening (7), discharging opening (9), motor (36), V-belt (38), gearbox (39), screen drum (35), (37 form the steel plate frame; There is guard shield (34) outside of screen drum (35); The installation of screen drum (35) is made the cantilever folk prescription to rotation from the horizontal by 10～30 degree angles.As Fig. 5, shown in Figure 6, screen drum (35) is installed on the output shaft (28) of gearbox (39).Gusseted circle (32) is arranged in the screen drum (35), and the end that output shaft (28) connects with screen drum (35) is furnished with flat key (31), ratchet (29), ratchet (30).Because sieve lattice (40) are welded in the gusseted circle (32), the stainless steel band steel of making sieve lattice (40) usefulness can be not only thin but also narrow, and distance can be smaller between the sieve lattice.Because of any surface finish, the sieve lattice become big osculum shape again, so coal is difficult for being blocked on the sieve lattice, screening efficiency reaches more than 99%.

The utility model is compared with existing coal supply device, and its advantage is, it can guarantee to meet boiler machinery combustion grate to coal particle degree≤25mm, the boiling boiler strict demand to coal particle degree≤8mm.Being applied to traveling-grate stoker with it is example, and flame is close and even on the burning zone, does not have blackout and the rubescent area of flame on the grate, and grate is smooth.Large coal particles is broken into granule and is mingled in the smalls, can make the grate good permeability, and pushes down smalls and do not blown away by wind, reduces the discharge capacity of dust.Because coal combustion must get well, the cigarette of emerging from chimney reaches maximum and allows 1 grade of discharge standard of lingemann blackness, has improved boiler efficiency, economizes on coal more than 20～30%.Because screening machine, pulverizer are to work under full closeding state, so improved working environment.The automatic coal supply device of a complete set of boiler is easy to operate, has alleviated labor strength, in various miniature boilers room small investment can be installed all.

Description of drawings:

Fig. 1 is the work schematic diagram of the utility model for the separate unit boiler;

Fig. 2 is connected on Fig. 1 a-a place to couple together work schematic diagram for many boilers;

Fig. 3 is a structural representation of the present utility model;

Fig. 4 is a rotary screen extension set structural representation;

Fig. 5 is a rotary screen extension set screen drum structural representation;

Fig. 6 is the left view of Fig. 5.

Specific embodiment of the utility model:

As shown in Figure 3, single rope grab (1) is connected with electric hoist (4) with steel wire rope (3) by pulley (2), electric hoist (4) is installed on the i-beam track (5), and its i-beam track (5) one ends are fixed on the indoor wall, and the other end is fixed on the slotted-angle shelving.The housing of grab bucket (1) is to be welded into 3mm～5mm steel plate, jaw maximum opening 1400-1600mm, wide 600mm-800mm.Rotary screen extension set (6) is fixed on the slotted-angle shelving that end use of revenue to finance expense rises, and its discharging opening I (7) is connected with buried scraper conveyer feed inlet I (8); Its discharging opening II (9) is connected with the charging aperture of disintegrating machine (10).Disintegrating machine discharging opening (11) is connected on the buried scraper conveyer feed inlet II (12).The motor (13) that drives disintegrating machine (10) is fixed on the slotted-angle shelving, drives disintegrating machine (10) by V-belt (14).Disintegrating machine (10) is fixed on the channel-section steel frame (15) on the support (23), and the channel-section steel that is adopted is 10 ^#～12 ^#The trough of embedded scraper transporter (16) is to make with the steel plate of thick 4～5mm, and scraper chain (17) is driven by sprocket wheel (18), chain (19), and its gearbox (20), motor (21) are installed on the slotted-angle shelving (22).

As shown in Figure 4, the coal bunker (33) of rotary screen extension set (6), guard shield (34), discharging opening (7) and discharging opening (9) all are that the steel plate with thick 3～5mm is welded into, running part comprises motor (36), V-belt (38) and gearbox (39), and whole screening machine (6) is installed on the steel plate frame (37).The installation of screen drum (35) should be from the horizontal by 20 degree angles.As Fig. 5, shown in Figure 6, sieve lattice (40) are that stainless steel band steel wide with 10～15mm, thick 1～3mm is welded in gusseted circle (32), and young collar extension is big in the formation.Sieve mesh is 15mm.The diameter of screen drum is 500mm, long 800mm.

Claims

1, the automatic coal supply device of a kind of small-sized machine combustion grate and boiling boiler, comprise grab bucket (1), slide rail (5), it is characterized in that, it also comprises embedded scraper transporter (16), rotary screen extension set (6) and disintegrating machine (10), the screen drum (35) of described rotary screen extension set (6) is from the horizontal by 18～25 degree angles, screen drum (35) is made the cantilever folk prescription to rotation, and screen drum (35) is to be welded in gusseted circle (11) with stainless steel band steel (10).