CN2490426Y

CN2490426Y - Compound combustion boiler

Info

Publication number: CN2490426Y
Application number: CN 01209479
Authority: CN
Inventors: 宋明哲; 宋殿麒
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-03-17
Filing date: 2001-03-17
Publication date: 2002-05-08
Anticipated expiration: 2011-03-17

Abstract

The utility model relates to a compound combustion boiler using coal, in particular bituminous coal as fuel, which is provided with a lower grate (14) which is positively combusted, and is characterized in that furnace doors (1) and (2) are arranged on the side surface of a boiler body, the compound combustion boiler is provided with double-hearth structures (3) and (4), an air strengthening combustion chamber (5) is arranged above a hearth (4), fire inlets (8) and (9) in opposite directions are arranged on the air strengthening combustion chamber (5), a section (6) and a dust falling chamber (7) are vertically arranged at the outlet of the hearth, and a fire inlet (10), a fire outlet (11), a dust falling point (12) and a dust removing port (13) are arranged in the dust falling chamber (7). The existing boiler has large black smoke, large dust capacity, small capacity, difficult operation and small output, and causes serious pollution to the environment. The utility model discloses establish a newest combustion mode-double entry combustion system, solved the problem that the boiler smokes black cigarette under the circumstances that improves boiler thermal efficiency and increase boiler output, boiler capacity obtains expanding simultaneously, utilizes the big characteristics of the interior flue gas velocity of flow of boiler to create the boiler from the precedent of removing dust.

Description

Boiler with complex combustion

It particularly is the boiler with complex combustion of fuel with bituminous coal with coal that the utility model relates to a kind of.

For a long time, hand firing's boiler all adopts fixed grate forward combustion mode, and a series of variations take place when burning on lower fire grating coal, i.e. preheating and drying and volatilizing thing are overflowed, and coke forms, and lime-ash forms.Wherein after the coal drying, when temperature continues to raise, the coal of oven dry begins to decompose, decompose back different components material and begin the fuel gas of overflowing, burner hearth is the oxygen surplus as a complete unit, but local anoxic, and furnace temperature is on the low side, the small part fuel gas can not get burning and decomposes and is cracked into fine carbon black particle---black smoke, and favorable current is emerged from chimney.This is an one to cause dirty beam to waste the energy again to environment.Its two fixed grate boiler is subjected to the restriction of hand shovel(l)ing of coal distance, and therefore this kind boiler capacity generally only is 1.05MW.Its three boiler dusts discharging is bigger, and especially forced-draft boiler is bigger.

Be to solve boiler emission black smoke problem, progressively adopted double-layer grate since the nineteen eighty-three boiler, now having formed is the fixed grate combustion system that supports with the double-layer grate.The double-layer grate burning has the combustion law of himself, can reach standard by rule operation oke exhaust blackness, but boiler output wretched insufficiency, do not reach application target, stoker's amount of labour is too big in addition, thereby mode of operation is out of favour, and the result forms and only burns the stoker mode of lower fire grating without upper fire-grating, and oke exhaust blackness problem out of control is not resolved.There is no report about enlarging boiler capacity and boiler from the dedusting problem.

The purpose of this utility model is that a kind of boiler with complex combustion will be provided.It can solve the boiler over-emitting black exhaust effectively, and overproof boiler attendance difficulty of dust emission and solution boiler increase the problem of capacity.

The purpose of this utility model is achieved in that in the boiler side fire door is set, furnace depth is less, even the 1.4MW boiler also has only 1.5 meters, surpass the 1.4MW boiler and can establish twin furnace or three chamber structures, thereby this type of boiler capacity obtains enlarging, aerial combustion chamber with flue gas heating naked light ignitability is set above that burner hearth that connects convection bank simultaneously, and establish relative direction above it and advance burner, aerial combustion chamber coal-fired flue gas and the flame that produces of lower fire grating under the effect of negative pressure source is inhaled into wherein, two bundle flames heat mutually and light unburnt material, aloft the combustion chamber forms stronger fire combustion bundle gradually, combustible aloft can repeatedly be lighted the combustion chamber in the flue gas, last after-flame.Self-evident twin furnace is same to promote that mutually volatile matter burns.Obviously the situation down smoke-discharging blackness that increases in boiler output reaches standard.At boiler smokestack place downward flow process section and dust level point are set, the downward high-speed motion of flame under the effect of negative pressure source, the flue gas of burning formation and glittering dust are arranged in flame, because the inertia significant difference in its proportion different motion, the flue place is provided with 180 ° and upwards turns to above the dust level point, the dust that inertia is bigger is still done straight line and is moved downward and inject settlement point, and the less flue gas of inertia changes 180 ° of convection banks suctions that upwards linked to each other with negative pressure source, thereby dust separates with flue gas, and the boiler export dust reduces the standard that reaches.

The utility model aerial overheavy firing chamber and lower fire grating have been formed a kind of new combustion system---complex combustion system.Having solved boiler black smoke problem has increased boiler output, and has improved the thermal efficiency.Better with double-layer grate than operability, overcome the double-grate boiler undercapacity and alleviated stoker's labour intensity, owing to the improvement of burner hearth fire door, boiler capacity obtains enlarging, and has started the precedent of boiler from dedusting simultaneously.

The concrete structure of utility model is provided by following embodiment and accompanying drawing thereof.

Fig. 1 Fig. 2 is front view and the side view according to the boiler with complex combustion that the utility model proposes.

Describe details and working condition in detail below in conjunction with Fig. 1 Fig. 2 according to the boiler with complex combustion that the utility model proposes.

This boiler comprises that pot door (1) pot door (2) is arranged in the body of heater side, furnace depth remains on and is fit to operation about 1.5 meters, burner hearth (3) burner hearth (4) also links with smokestack, form double-furnace structure, this provides condition for making the high-efficiency large capacity boiler, and be provided with aerial combustion chamber (5) in the top of burner hearth (4) and on (5), be provided with relative direction and enter burner (8), (9), lower fire grating is numbered (14), has formed the complex combustion system by (14), (5), (8), (9).Be provided with in the flame flow process and move towards section (6) and dust landing chamber (7) downwards, and be provided with into burner (10) crater (11) on (7), dust level point (12) and dust are removed mouthful (13), have promptly formed boiler from dust arrester.

Boiler is mixed subsidiary engine instrument valve etc. and is formed the coal ash disposal system through installing, and forms the smoke evacuation system with negative pressure by air-introduced machine etc., and formation such as water pump water circulation system or the like is not drawn among the figure.When boiler operatiopn, by fire door (1), (2) coal, air enters from lower furnace door under air-introduced machine attracts, enter burner hearth (3), (4) by lower fire grating (14), coal burns through lighting, the flame that burning forms and unburnt combustible and dust under air-introduced machine attracts from different positions by advance burner (8), (9) enter aerial combustion chamber (5), two bundle flames heat mutually lights combustible, the flame that motion is being burnt meets with oncoming another Shu Huoyan in (5), heating is lighted mutually again, last combustible after-flame.The flame bundle passes through section (6) high-speed motion downwards under air-introduced machine attracts, when advancing burner (10) and enter expansion chamber (7), the dust bigger than great inertia holds down rectilinear motion and flue gas and breaks away from and inject settlement point (12) in the flame, dust can concentrate the back to remove by removing mouthful (13), turn to 180 ° upwards to be inhaled into convection bank to conduct heat through the flue gas that purifies by flame export (11) and inertia is little, injected chimney by air-introduced machine at last and arrange to atmosphere.

Claims

1, particularly be the boiler with complex combustion of fuel with bituminous coal with coal, this boiler is provided with the lower fire grating (14) of forward combustion, it is characterized in that fire door (1) (2), is arranged in the boiler furnace side; Has double-furnace structure (3) (4), and be provided with aerial overheavy firing chamber (5) in the top of burner hearth (4) and be provided with relative direction on combustion chamber (5) aloft and enter burner (8), (9), be arranged vertically section (6) and dust landing chamber (7) at the furnace outlet place and in dust landing chamber (7), be provided with dust level point (12) and dust removing mouthful (13) into burner (10), crater (11).

2, according to the described boiler with complex combustion of claim 1, it is characterized in that aerial combustion chamber (5) relative direction is advanced burner (8), (9) form the complex combustion system with forward combustion fire grate (14), lower fire grating (14) is buring solid fuel in the above, and aerial combustion chamber (5) can burning gases fuel and granule combustible.

3, according to the described boiler with complex combustion of claim 1, it is characterized in that perpendicular segment (6), dust landing chamber (7), go into burner (10), crater (11), dust level point (12) dust and remove the boiler mouthful (13) formed from dust arrester.