CN2335008Y - Reinforced combustion fly ash reburning type coal-throwing machine boiler - Google Patents

Abstract

The utility model provides a reinforced combustion fly ash reburning type boiler of a coal-throwing machine, which comprises a boiler main body of a coal-throwing machine, wherein the front wall of a boiler chamber is provided with a front arch; a separator is arranged in a flue; an ash containing hopper and an ash conveying pipe are arranged below the separator; the ash conveying pipe stretches into the boiler chamber. The utility model can reduce the fume dust drainage quantity and the blackness of the fume dust of the coal-throwing machine boiler, can improve the coal burn-out rate of carbon, and can reduce energy consumption.

Description

Overheavy firing fly-ash reburning formula spreader stoker boliler

The utility model relates to a kind of boiler.

Spreader feeder forward-moving grate boiler is by machinery or mechanical wind-force coal to be thrown the stove internal combustion, it large coal particles throw far away, that small-particle coal is thrown is near, adopts the fire grate reversing to adapt with it.Because ickings causes the boiler over-emitting black exhaust with the flue gas burner hearth that flies out, the unburned carbon in flue dust height, deadly defects such as energy consumption height, relevant department give stricts orders before 2000 as can not solve the problem of spreader stoker boliler over-emitting black exhaust, will force manufacturing firm's stopping production.But spreader stoker boliler is half suspension combustion, and coal adaptability is strong, starts soon, and the Load Regulation ability is strong, will be brought very big technology, loss economically in case abolish.Therefore the over-emitting black exhaust problem that solves spreader stoker boliler is extensively paid attention to.Two kinds of solutions are arranged in the prior art.A kind of is to increase primary dust removing, and the carbon containing flying dust in the flue gas is caught, and reduces smoke content, in the hope of reaching environmental requirement, this technical scheme need increase a deduster and change bigger blower fan for steam generator system, and can not cut down the consumption of energy, and invests very big.Be to increase the fire grate burning capacity in another, water-cooling wall intersects in stove to catch flying dust before and after changing, and this technical scheme retrofit work amount is other big, serious wear in the expense height, stove, and effect is not so good.

The purpose of this utility model is to provide a kind of can reduce content of harmful and the overheavy firing fly-ash reburning formula spreader stoker boliler that cuts down the consumption of energy in the flue gas.

The purpose of this utility model is achieved in that it comprises the spreader stoker boliler main body, and a face arch is installed on the antetheca of burner hearth, is provided with a separator in flue, has one to connect ash bucket and extend into the interior ash feeding pipe of burner hearth under the separator.

Advantage of the present utility model is: be provided with face arch in burner hearth, and the size of face arch is bigger, the end points of face arch will surpass the center line of burner hearth usually.Burner hearth is divided into overheavy firing chamber and secondary furnace, and it can play three effects.The one, improve ignition temperature, increase combustion intensity, the 2nd, face arch is caught a part of fly ash particle, makes it to drop on the fire grate to burn away, the 3rd, air-flow forms S shape, prolongs the tail-off time of particle.Separator in the flue and the ash bucket behind the separator, ash feeding pipe are separated unburnt carbon containing flying dust, send into fire grate again behind the stove again and burn.The utility model can reduce the smoke discharge amount and the flue dust blackness of spreader stoker boliler greatly, improves the burn-off rate of carbon.The technical solution of the utility model is want can improve the efficiency of combustion of 7-15% than improving exerting oneself of 5-10% with former spreader stoker boliler, and the flue dust blackness drops to below the Lin Geman one-level, reaches environmental protection standard.Its improvement cost is low, transforms to take by energy-conservation and regains in 7 months.The technical solution of the utility model can be used for the manufacturing of new boiler, also can be used for the transformation of existing spreader stoker boliler.

Fig. 1 and Fig. 2 are the structural representations of two kinds of embodiments of the utility model.

For example the utility model is done more detailed description below in conjunction with accompanying drawing: in conjunction with Fig. 1.Face arch 2 is installed on the antetheca of the burner hearth of spreader stoker boliler main body 1, and the antetheca place of common spreader stoker boliler burner hearth generally is equipped with water-cooling wall, and face arch of the present utility model promptly replaces water-cooling wall and is installed on former water-cooling wall place.The end points of face arch surpasses the burner hearth center line.Separator 3 is a kind of in groove separator, louver separator or the cyclone separator, and it is installed in the reversal chamber.Ash bucket 4 is arranged at the bottom of separator.Pick ash pipe 5 behind the ash bucket, ash feeding pipe extend into the rear portion of burner hearth.Use of the present utility model is identical with common spreader stoker boliler, adopts machinery or machinery to combine with wind-force coal is thrown to the burner hearth internal combustion, fire grate reversing operation.Unburnt particle has part to bump with face arch and falls back to and burn away on the fire grate, and particularly the utility model is big with the commentaries on classics of face arch design, and promptly end points surpasses the burner hearth center line, makes the resume combustion effect of uncombusted particle fairly obvious.Rise in the S shape passage that flue gas is formed by face arch in burner hearth, prolonged the tail-off time of particle.Flue gas is separated uncombusted carbon containing flying dust through separator after entering reversal chamber, falls into ash bucket, and second-time burning is carried out at the rear portion that is sent to burner hearth counter-rotating fire grate through ash feeding pipe again.Separator, ash feeding pipe are arranged in the boiler, can need power that the carbon containing flying dust is sent into fire grate, can not produce the flying dust phenomenon.For the cleaning of ash feeding pipe, on ash feeding pipe, be provided with blowing mouth 6.

In conjunction with Fig. 2.Second kind of embodiment of the present utility model is to be dry collector 7 with separator designs, and it is installed on before the wet scrubber of boiler, and ash feeding pipe extend into the rear wall or the sidewall of burner hearth.Air blast 8 is arranged behind the dry collector, the carbon containing flying dust is introduced burner hearth, this structure relatively is suitable for the transformation to existing spreader stoker boliler.

Claims (4)

1, a kind of overheavy firing fly-ash reburning formula spreader stoker boliler, it comprises the spreader stoker boliler main body, it is characterized in that: a face arch is installed on the antetheca of burner hearth, is provided with a separator in flue, have one to connect ash bucket and extend into the interior ash feeding pipe of burner hearth under the separator.

2, overheavy firing fly-ash reburning formula spreader stoker boliler according to claim 1 is characterized in that: the end points of described face arch surpasses the burner hearth center line.

3, overheavy firing fly-ash reburning formula spreader stoker boliler according to claim 1 and 2, it is characterized in that: described separator is a kind of in groove separator, louver separator or the cyclone separator, it is installed in the reversal chamber, and ash feeding pipe extend into the rear portion of burner hearth.

4, overheavy firing fly-ash reburning formula spreader stoker boliler according to claim 1 and 2, it is characterized in that: described separator is a dry collector, and it is installed on before the wet scrubber of boiler, and ash feeding pipe extend into the rear wall or the sidewall of burner hearth.

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