CN2539072Y - Layered coal feeder - Google Patents

Abstract

The utility model discloses a layered coal feeder for boiler, which comprises a coal feeding cartridge (1), a pulverized lime cartridge (2), a mixing cartridge (3), a material mixing and feeding roller (4), a vibrating screen (5) and a coal-passing-plate (6). The utility model, compared with the prior art, has the advantages of rational structural design, big end down section of the coal seam, uniform, temper and loose section, combusting completely, raising thermal efficiency, reducing pollution, and preventing crater and combustion nonuniform.

Description

Novel layering coal supply device

The utility model relates to a kind of improvement of forward chain grate boiler layering coal supply apparatus, specifically a kind of novel layering coal supply device.

At present, traditional coal flashboard type coal feeder, simple in structure, cloth coal continuous formation, but mixed coal very closely knit through the extruding back change of coal flashboard caused improper ventilation.The place that fire grate both sides coal cinder is concentrated because of ventilating, burns in advance, causes and leaks out.The position that break flour is concentrated is not smooth because of ventilating, and raw coal combustion is incomplete, easily causes local burner, makes a large amount of cold wind enter burner hearth, causes temperature to reduce.It is insufficient to burn, and a large amount of combustibles are drained with slag, have increased coal consumption, have reduced the thermal efficiency of boiler.A kind of layering coal supply device (patent No.: ZL93231575.5), adopt the method for mechanical grading is arranged now.When boiler operatiopn, cylinder rotates, and drives fire coal, it is dropped on the sieve, thereby make the coal layering.But this device is just changeing on the chain-grate boiler at large-scale (more than the 20t) and is using, and has certain energy-saving effect.But to miniature boiler (20t is following), particularly 4t and 6t boiler, because structural limitations, the sieve inclination angle is big, and diameter of cylinder is little, and layered effect is bad, energy-saving effect is not obvious, and present various boilers only just consider desulfurization when dust treatment, concerning miniature boiler, and can corresponding increase user environmental protection cost.

The purpose of this utility model is at the said goods defective and deficiency, provide a kind of can make the fire coal that enters burner hearth form down big little, evenly smooth, loose, and the novel layering coal supply device that when burning, can carry out desulfurization.

The purpose of this utility model is achieved in that novel layering coal supply device is by constituting for coal bunker, lime powder bin, mixing bunker, batch mixing feed roller, vibratory sieve, coal passing plate.In the dead ahead of mixing bunker the front side dodge gate is arranged, two place's peep holes are arranged on the dodge gate.The front side dodge gate is made of steel plate, and links together by bolt and mixing bunker; Be the cuboid funnel-form respectively for coal bunker, lime powder bin, just in time facing to the batch mixing feed roller, the batch mixing feed roller is to be welded by Φ 70 seamless steel pipes and Φ 8 round steel to its feed opening; The seamless steel pipe two ends are welded with spindle nose, link to each other with steel plate on the mixing bunker by sliding bearing, and spindle nose one end is equipped with by movable sprocket, and the other end is equipped with big belt pulley; Batch mixing feed roller bottom surface nestles up a coal passing plate, and coal passing plate is made with steel plate, and is welded on the steel plate above the dodge gate of mixing bunker front side; Vibratory sieve and has certain gradient below coal passing plate, vibratory sieve links together by the angle steel of spring base with bolt and mixing bunker bottom; In the vibratory sieve middle part vibrator is housed, vibrator is made up of eccentric shaft and eccentric block.Eccentric shaft passes the steel pipe on the screen box, is connected with sieve box side plate by sliding bearing, and vibrator two ends spindle nose stretches out the outside by the hole on the mixing bunker, and loads onto flywheel respectively, and one of them is a belt pulley; Near a coal flashboard is arranged to the coal bunker place, it is to be made by steel plate on mixing bunker top, by the screw mechanism lifting, with the control coal seam thickness; A upside dodge gate is arranged on mixing bunker top, and last jug links to each other with steel plate above the mixing bunker by bolt; The bottom of mixing bunker is uncovered, directly facing to fire grate.Below the mixing bunker header board, on the inner steel plate a preceding spillplate is arranged, be mainly used in and block the gathering coal that rolls down on the vibratory sieve, prevent that it from falling the fire grate front.When using the utility model, coal and pulverized limestone are respectively charged into to coal bunker and lime powder bin, by the passive sprocket rotation on the axle drive sprocket drive batch mixing feed roller on the boiler grate, thereby the mixture (lime generally accounts for 3%-5%) that makes coal and lime is above coal passing plate is fallen vibratory sieve, and the Da Pi wheel on the batch mixing feed roller drives the belt pulley rotation on the vibrator eccentric shaft simultaneously.Because the effect of uneven pouring weight produces centrifugal intertia force, thereby make the screen box vibration, material on the screen cloth is by vibration, and bulk is quickened descending, and fine coal and little beans are also fallen on the boiler grate from screen cloth with friction speed, thereby realize layering preferably, and when burning, carry out desulfurization.

The utility model has the advantages that: reasonable in design, applied widely, can make under the coal seam big little, evenly smooth, loose, sufficient combustion, the raising thermal efficiency, reduced exhaust emission.The cinder phosphorus content is reduced, improved the adaptability of boiler ature of coal.

Below in conjunction with accompanying drawing making of the present utility model is described in further detail:

Accompanying drawing 1 is a front view of the present utility model

Accompanying drawing 2 is an A-A cutaway view of the present utility model.

Make the utility model with reference to accompanying drawing 1, accompanying drawing 2.Novel layering coal supply device is by constituting for coal bunker 1, lime powder bin 2, mixing bunker 3, batch mixing feed roller 4, vibratory sieve 5, coal passing plate 6.Be welded for coal bunker 1, lime powder bin 2, mixing bunker 3 respectively with steel plate; Installing in the front of mixing bunker 3 has two peep holes on front side dodge gate 13, the front side dodge gate 13; Face batch mixing feed roller 4 respectively for the feed opening of coal bunker 1, lime powder bin 2, batch mixing feed roller 4 is welded by Φ 70 seamless steel pipes and Φ 8 round steel.The seamless steel pipe two ends are welded with spindle nose, and link to each other with mixing bunker 3 by sliding bearing, and spindle nose one end is equipped with by movable sprocket 7, and the other end is equipped with big belt pulley 8.Batch mixing feed roller 4 bottom surfaces nestle up coal passing plate 6, and coal passing plate 6 is to be made with steel plate, and are welded on the mixing bunker 3.Vibratory sieve 5 is made up of vibrator, screen box, spring etc.; Vibrator is made up of eccentric shaft and eccentric block; The steel pipe that eccentric shaft passes on the screen box is connected with sieve box side plate by sliding bearing; Screen box is welded by steel plate, steel pipe, angle steel, screen cloth; Spring is to be formed through heat treatment by the 65Mn spring steel.Vibratory sieve 5 links together by the angle steel of spring base with bolt and mixing bunker 3 bottoms.Vibrator two ends spindle nose stretches out by the hole on the mixing bunker 3 side steel plates, and the outside is loaded onto flywheel respectively, and one of them is a belt pulley 9.Belt pulley 9 links to each other with big belt pulley 8 by belt, is linked to each other with driving wheel on the fire grate by movable sprocket 7, thereby drives 4 rotations of batch mixing feed roller and vibratory sieve 5 vibrates.Near coal flashboard 10 being installed for coal bunker 1 place, coal flashboard 10 usefulness steel plates are made on the top of mixing bunker 3, by the screw mechanism lifting, with the control coal seam thickness.Upside dodge gate 12 is installed on mixing bunker 3 tops; Spillplate 11 before installing on the header board inner bottom surface of mixing bunker 3 is mainly used in and blocks the gathering coal that rolls down on the vibratory sieve, prevents to fall the fire grate front.The utility model can complete like this.

Claims (3)

1, a kind of novel layering coal supply device, it is by constituting for coal bunker (1), lime powder bin (2), mixing bunker (3), batch mixing feed roller (4), vibratory sieve (5), coal passing plate (6), a lime powder bin (2) is arranged at the top that it is characterized in that mixing bunker (3), and its feed opening is facing to batch mixing feed roller (4).

2, novel layering coal supply device according to claim 1 is characterized in that there is vibratory sieve (5) mixing bunker (3) the inside, and vibratory sieve (5) connects on the angle steel of mixing bunker (3) bottom with bolt by spring base.

3, novel layering coal supply device according to claim 1 is characterized in that the big belt pulley (8) on the batch mixing feed roller (4) links to each other with belt pulley (9) on the vibratory sieve (5) by belt.

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