CN1045931A - Two-stage vertical fan type coal-grinder - Google Patents

Abstract

At present, the design feature of the fan mill of home and abroad production all is a single-stage crushing.Can not satisfy the instructions for use of stove fully.The invention provides a kind of two-stage vertical fan type coal-grinder, its production capacity is 200kg/h, and its design feature is that two single-stage crushing mechanisms with raw coal are combined as a whole by connecting tube.Can once finish several technology degree of the supply of a wind of drying, pulverizing, conveying, coal supply and burning usefulness continuously, and coal powder size can reach more than 200 orders, exporting a blast can reach more than the 300KPa, its complete equipment technology arrangement adaptability is strong, can control the supply of coal amount, regulate coal powder size.

Description

Two-stage vertical fan type coal-grinder

The invention belongs to the disintegrating apparatus of material.

At present, the design feature of the fan mill that the home and abroad produces all is a single-stage crushing, can not satisfy the instructions for use of industrial furnace fully.Up to the present, the home and abroad does not still have the fan mill of twin-stage fragmentation.

The invention reside in a kind of two-stage vertical fan type coal-grinder, its production capacity are provided is 200kg/h, three kinds of 500kg/h and 1000kg/h etc.Fan mill requires the particle size after cracking of coal thin when coal-fired furnace and the supporting use of other industrial furnaces, outlet blast height.The single-stage fan mill of current production only depends on the linear velocity that improves its impeller outer edge, improve and the smashing fineness that improves coal, be subjected to the restriction of itself structure, not only cause rolling bearing to produce the heating phenomenon because improve the impeller outer edge linear velocity, and coal pulverizer vibration increase, noise also correspondingly improves.Cause machine volume to dote on greatly simultaneously, complex structure consumes steel material and increases, and has increased technology arrangement and installation difficulty.In a word, shorten the service life of coal pulverizer greatly.For addressing the above problem the two-stage vertical fan type coal-grinder that has designed a kind of compact conformation.Its design feature is that two single-stage crushing mechanisms with coal are combined as a whole by connecting tube, isolates powder process, thereby improves the broken fineness of coal.Also improve simultaneously the outlet pressure of its wind greatly, can be up to more than the 300KPa.Its general structure (seeing figure one).It is by coal supply mechanism (1), primary breakup mechanism (2), and final stage crushing mechanism (3), separating mechanism (4), transmission mechanism (5) and connecting tubes (6) etc. six are partly formed.

Coal supply mechanism (1) adopts cagem type stoker (seeing figure two) by direct current generator (1-1), and belt (1-2), reductor (1-3), minor sprocket (1-4), chain (1-5), hinge wheel (1-6), coal supply propeller parts such as (1-7) are formed.The output shaft of dc motor drives reductor through belt pulley, decelerates on the minor sprocket, drives hinge wheel by chain again, and hinge wheel links to each other with the coal supply propeller and makes its work.Dc motor is controlled voltage change to regulate the coal supply amount by electric cabinet.

Primary breakup mechanism (seeing figure three) takes to isolate powder process with the final stage crushing mechanism and is connected as one by connecting tube.By impeller (2-1), lining tile (2-2), casing (2-3), etc. parts form, connect by connecting tube.Its final stage crushing mechanism and primary breakup mechanism are structurally identical, just its design size difference.This impeller and lining tile are formed by the austenitic manganese steel casting of high hardness wear-resisting.Raw coal and primary drying hot blast enter in the mill chamber of primary breakup mechanism, and impeller rotation acting makes coal clash into crushing grinding between shock plate and casing lining tile.The wind that broken for the first time coal dust is produced by grinding machine self is transported to the final stage crushing mechanism through connecting tube and carries out mechanism's fragmentation for the second time, coal dust through primary breakup is done work by the impeller rotation in the final stage crushing mechanism again, makes coal dust bump and the crushing grinding between shock plate and casing lining tile again.Simultaneously, blast improves once more, and coal dust is brought jet pipe into by a wind and entered separating mechanism.Just, the final stage crushing mechanism is a heart part of finishing the powder process function.

The thickness of the adjustable coal saving powder granularity of separating mechanism (seeing figure four), it is made up of jet pipe (3-1), coal output pipe (3-2), separation fan plate (3-3), anti-riot hole (3-4), key (3-5), meal feedback outlet parts such as (3-6).Enter disengagement chamber through the thin roughly uneven coal dust after the fragmentation by jet pipe, fine breeze is transported to coal output pipe by a wind, burn the pipeline of chewing through being attached to, deliver to burn to chew and burn, when the rough coal powder is fanned plate through separating, because inertia is bigger, can not be taken away by a wind, enters hopper through feed back and pulverizes to mill chamber again.

Transmission mechanism (seeing figure five) is made up of bearing (4-1), belt pulley (4-2), bearing lower body (4-3), bearing upper body parts such as (4-4).The characteristics of this transmission mechanism are to adopt dual-support structure, are driven through belt pulley by ac motor, thereby have solved that under cantilever position impeller is hit and the bearing heating that causes, the problems such as vibration that high speed rotating produces.

Two-stage vertical fan type coal-grinder can once be finished several processes such as supply of a wind of drying, pulverizing, conveying, coal supply and burning usefulness continuously.Its rated output is 200kg/h; 500kg/h; 1000kg/h etc., coal powder size can reach more than 200 orders, and the outlet blast is generally more than the 200KPa, reaches as high as 300KPa.Its complete equipment technology arrangement adaptability is strong, can control the supply of coal amount, and the thickness of free adjustment coal powder size also can be selected arbitrarily and the layout heat supply point according to the requirement of heating process technology.Particularly spindle drive is stressed evenly, has prolonged the service life of bearing.It is the corollary equipment of suitable various materials and stove powder process, burning.

The present invention is not only applicable to the steel rolling coal-fired furnace and grinds coal dust, and is widely used in boiler and non-ferrous metal metallurgy, chemical industry, the industrial furnace of industries such as building materials.Also can be used as the powder manufacturing apparatus of lime stone, dolomite, gypsum and plastic product.

Claims (3)

1, a kind of two-stage vertical fan type coal-grinder is characterized in that by coal supply mechanism, and six parts such as primary breakup mechanism, final stage crushing mechanism, separating mechanism, transmission mechanism and union-screw coupling are formed.

2, it is characterized in that according to claim 1 described primary breakup mechanism and final stage crushing mechanism taking to isolate powder process is connected as one by connecting tube.

3, it is characterized in that dual-support structure according to claim 1 described transmission mechanism.

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