CN2304818Y

CN2304818Y - Coal layered and waved feeder for chain boiler

Info

Publication number: CN2304818Y
Application number: CN 97237377
Authority: CN
Inventors: 董建国; 曾仕和
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-07-16
Filing date: 1997-07-16
Publication date: 1999-01-20
Anticipated expiration: 2007-07-16

Abstract

The utility model relates to a layered and waved coal feeding device for positive rotation chain boilers, which comprises a coal scuttle composed of an upper section coal falling scuttle, a middle section coal feeding scuttle and a lower section coal separation scuttle, a coal blocking device arranged in the coal falling scuttle, a coal feeding roller arranged in the coal feeding scuttle, a compound sieve which is rotationally connected with an inner wall of the coal separation scuttle through a rotating shaft and a flow guiding plate which is arranged on the inner wall of the coal separation scuttle and is matched with the compound sieve. The utility model has simple structure and can realize reasonable stratification of the coal on a fire grate, enlarge the surface area of coal layers, improve the combustion conditions of a boiler chamber and increase the temperature in the boiler chamber. Therefore, the utility model can enhance the output of the boiler and save the coal simultaneously and the utility model is suitable for feeding the coal to boilers.

Description

Just changeing chain-grate boiler layering and wave coal feeder

The utility model relates to a kind of coal supply apparatus for boiler, particularly relates to a kind of chain-grate boiler layering and wave coal feeder of just changeing.

Use coal feeder to give the boiler coal supply, can improve the distribution of coal on fire grate, improve boiler output, can save fire coal simultaneously and save the labour.Chinese patent CN2221720Y has introduced a kind of chain coal feeder that just changeing, and it is made up of coal breakage bucket, feeding-coal bucket and branch coal bunker.Divide in the coal bunker and be provided with by the top sieve plate, individual layer composite screen with the broach shape grating formation that is connected as a single entity with it, the interruption-like folding in grating bottom is low, be provided with the elastic force coal-stopper in the coal breakage bucket, its top is located by connecting by a bolt that is fixed on the channel-section steel frame, and bolt is with spring outward, and the coal-stopper lower end is articulated on the channel-section steel, spillplate is connected with screw mandrel, and rotary screw rod can be regulated spillplate and deliver coal inter-agency distance.Though this kind coal feeder has solved separating of ickings and coal dust preferably, form gas permeability coal seam preferably, solved that just to change the ubiquitous coal adaptability of chain-grate boiler poor, efficiency of combustion is low, problems such as undercapacity, but also have following problem in actual use: the ature of coal screening effect that 1) humidity is different differs greatly, and this kind individual layer composite screen can not adapt to the screening of the different fire coal of humidity well.2) the coal grain after the screening is easily thrown to fire bars sprocket wheel front, causes the stokehold to stop up.3) because coal feeder links to each other with the boiler face arch, temperature is higher, and is yielding.4) power of the brushing lightly coal-stopper in the coal breakage bucket, for the large-scale coal feeder more than 20 tons, this elastic force coal-stopper then can not play the effect of retaining coal, usually causes the transmission chain fracture.

The purpose of this utility model is to overcome above-mentioned shortcoming, provides a kind of screening and layered effect better just changeing chain-grate boiler layering and wave coal feeder.

The utility model is just changeing the chain-grate boiler layering and the wave coal feeder is to realize like this, it comprises the coal bunker that divides coal bunker to constitute by epimere coal breakage bucket, stage casing feeding-coal bucket and hypomere, be arranged on the coal-stopper in the coal breakage bucket, be arranged on the coal feeding cylinder in the feeding-coal bucket, be installed in the composite screen that is rotationally connected with it on the branch coal bunker inwall by rotating shaft, and be installed on the branch coal bunker inwall and the deflector that cooperates with composite screen.Wherein, coal-stopper is by the gear that is installed on the coal breakage headwall, and with the tooth bar of gears engaged, and the spillplate that is fixed on the tooth bar forms, and regulates distance between spillplate and coal feeding cylinder by the peripheral hardware handwheel, to reach the purpose of regulating coal seam thickness.Deflector is used to guide fire coal to fall to composite screen, sends into layer coal combustion surface area in the boiler for increase, has on the deflector to be arranged in parallel and fuisw rib that cross section is triangular in shape, makes the layer coal surface undulate after the screening layering, to improve fire box temperature.Rotating shaft two ends on the composite screen are fixed on the coal supply headwall, composite screen can be swayed, be convenient to according to coal in the angle of inclination of humidity regulation composite screen, to reach the screening layered effect of Cui, composite screen is a pectination, and the grating on it is thin circle bar, and becomes angle and be spaced front and back two rows, the smooth curve of grating makes more Cui of grating gap transition, favourable raising sieve performance.For preventing that fire coal from shedding forward, block the boiler grate driving chain, can a front apron that be connected with its hinge be installed at minute coal bunker inwall end opening place.Because coal feeder boiler face arch links to each other, temperature is higher, and is yielding, is preferably in when reducing the boiler face arch and by on the rear wall of boiler face arch the full water cooling wall is set at feeding-coal bucket, to prevent the temperature distortion of feeding-coal bucket wall.The rotating shaft of the coal feeding cylinder in the feeding-coal bucket is installed on the coal supply headwall, and its rotation is realized by the sprocket wheel that chain passes on the coal feeding cylinder axle by the boiler grate sprocket shaft.For preventing the driving chain fracture effectively, can on the coal feeding cylinder axle, alarm mechanism be installed, it is by the contiguous block that is fixed as one by the sprocket wheel on safety plug and the coal feeding cylinder axle, touch panel and be enclosed within on the safety plug and the relief spring between touch panel and contiguous block is formed.Convenient for installing and overhauling, can and divide at feeding-coal bucket the panel hinged with it is set on coal bunker wall, switch is very convenient.Also can sealing strip be installed at coal breakage headwall and coal feeding cylinder cooperation place, it and coal supply headwall weld together, and are used for preventing that coal breakage bucket coal cinder from leaking forward.

The operation principle that the utility model is just changeing chain-grate boiler layering and wave coal feeder is, supply with coal-fired from the coal breakage bucket, under the promotion of coal feeding cylinder, adjusting by coal-stopper, fall equably to deflector, being split into several strands of waterfalls stream through deflector falls and sieves to composite screen, fines falls from the gap of grating near-end, coarse granule is then thrown to downwards at a distance along grating, and cooperate the fire bars move below, form the coal seam of up-thin-low-thick natural transition on fire bars, form several bursts of waveform surfaces simultaneously, wherein the thickness in coal seam is just controlled by regulating the spillplate position.

The advantage that the utility model is just changeing chain-grate boiler layering and wave coal feeder is that coal-fired layered effect is good, sieve performance improves, prevent the temperature distortion of feeding-coal bucket rear wall effectively, more convenient operation, make the surface, coal seam on the fire bars form waveform simultaneously, increase its combustion surfacearea, the fire box temperature height, boiler output is improved, and effect of coal saving is remarkable.

Describe the utility model embodiment in detail below in conjunction with accompanying drawing.

Fig. 1: the utility model structural representation

Fig. 2: deflector schematic diagram

Fig. 3: the A-A cut-away view among Fig. 2

Fig. 4: composite screen structural representation

Fig. 5: composite screen side diagrammatic sketch

Fig. 6: alarm mechanism structural representation

The utility model is just changeing the chain-grate boiler layering and the wave coal feeder comprises by epimere coal breakage bucket 1, the coal bunker that stage casing coal supply 2 buckets and hypomere divide coal bunker 3 to constitute, be arranged on the coal-stopper in the coal breakage bucket 1, be arranged on the coal feeding cylinder 4 in the feeding-coal bucket 2, be installed in the composite screen 6 that is rotationally connected with it on branch coal bunker 3 inwalls by rotating shaft 5, be installed on branch coal bunker 3 inwalls and and cooperate with compound decorations 6, the deflector 7 that fuisw rib 11 is arranged on it, by hinge 12 and the front apron 13 that divides coal bunker 2 inwall end opening places to be connected, be arranged on the full water cooling wall 14 on feeding-coal bucket 2 rear walls, be installed in the alarm mechanism on the coal feeding cylinder axle 15, be fixed on the sealing strip 16 on the feeding-coal bucket 2, and on feeding-coal bucket 2 and branch coal bunker 3 walls, the panel 17 hinged with it be set.Wherein, coal-stopper is by the gear 8 that is installed on coal breakage bucket 1 wall, and with the tooth bar 9 of gear 8 engagements, and the spillplate 10 that is fixed on the tooth bar 9 is formed.Alarm mechanism is by the contiguous block 20 that is fixed as one by safety plug 18 and sprocket wheel 19 on the coal feeding cylinder axle 15, the touch panel 21 that cooperates with travel switch 23, and be enclosed within relief spring 22 compositions on the safety plug 18 and between touch panel 21 and contiguous block 20.

The rotation that the utility model is just changeing the coal feeding cylinder 4 in chain-grate boiler layering and the wave coal feeder is realized by the sprocket wheel 19 that chain 25 passes on the coal feeding cylinder axle 15 by boiler grate sprocket wheel 24.

Claims

1, a kind of chain-grate boiler layering and wave coal feeder of just changeing, comprise the coal bunker that divides coal bunker to constitute by epimere coal breakage bucket, stage casing feeding-coal bucket and hypomere, be arranged on the coal-stopper in the coal breakage bucket, be arranged on the coal feeding cylinder in the feeding-coal bucket, and inclination is installed in the composite screen on the branch coal bunker inwall, it is characterized in that composite screen is rotationally connected with dividing the coal bunker wall by rotating shaft, and on minute coal bunker inwall, the deflector that cooperates with composite screen is installed.

2, chain-grate boiler layering and the wave coal feeder of just changeing as claimed in claim 1 is characterized in that composite screen is a pectination, and the grating on it is thin circle bar, and becomes angle and be spaced front and back two rows.

3, chain-grate boiler layering and the wave coal feeder of just changeing as claimed in claim 1 is characterized in that having on the deflector being arranged in parallel and fuisw rib that cross section is triangular in shape.

4, chain-grate boiler layering and the wave coal feeder of just changeing as claimed in claim 1 is characterized in that branch coal bunker inwall end opening place is equipped with the preceding spillplate that is connected with its hinge.

5, chain-grate boiler layering and the wave coal feeder of just changeing as claimed in claim 1 is characterized in that feeding-coal bucket leans on the rear wall of boiler face arch to be provided with the full water cooling wall.