CN2190235Y

CN2190235Y - Smoke eliminating, dust collecting and energy saving device in stoves

Info

Publication number: CN2190235Y
Application number: CN 93232136
Authority: CN
Inventors: 刘雪华
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-11-01
Filing date: 1993-11-01
Publication date: 1995-02-22
Anticipated expiration: 2003-11-01

Abstract

The utility model relates to a smoke eliminating, dust collecting and energy saving device in stoves, belonging to the field of the combustion equipment. The device is mainly characterized in that the interior of a combustion chamber is provided with a smoke refluxing arch wall and a curve-shaped arch similar to a wind distributing duster, which compels the fume making 'S'-shaped movement in the combustion chamber. Thus, the utility model can achieve effects of smoke elimination, dust collection and energy saving in stoves. The experiment proves that the fume exhausting blackness and the fume exhausting concentration of a boiler with the device can reach requirements of pertinent regulations of environmental protection under the condition of no duster. Besides, the heat efficiency of the boiler is improved. The device has simple structure and low implementation cost.

Description

Smoke eliminating, dust collecting and energy saving device in stoves

The utility model relates to a kind of combustion apparatus that is used for boiler, can the interior energy-conservation burner of smoke abatement and dust control of stove when especially burning bituminous coal.

At present, known grate firing equipment, as the combustion apparatus of fast-assembling chain grate boiler, fast-assembling reciprocating-grate boiler, fuel gas and carbon particle incomplete combustion when burning bituminous coal, oke exhaust blackness exceeds standard.In order to address this problem, adopt the lengthening rear arch usually and install hogging additional and solves, the lengthening rear arch has reduced radiation heating-surface, and it is not obvious to add the hogging smoke effect, and fuel combustion is not exclusively and stove over-emitting black exhaust problem solution undesirable.

The purpose of this utility model provides smoke abatement and dust control energy saver in a kind of stove.It can not only make fuel gas and carbon particle make serpentine when motion after-flame in stove, but also can play the effect of dedusting, reaches smoke abatement and dust control purpose of energy saving in the stove.

The purpose of this utility model is achieved in that (1) is provided with across this chamber and keeps the twice foldings cigarette arch wall of certain distance in the combustion chamber, wherein the front is following near the coal seam together, upper end and furnace roof keep the folding cigarette arch wall of a segment distance, after be that lower end and coal seam keep big distance, the folding cigarette arch wall that the upper end is connected with furnace roof together.Twice folding cigarette arch wall is arranged on the corresponding position that the coke burning was not held on the fire grate when boiler is commonly used loaded.This wall is the common wall that is built into refractory material.Because when having had flue gas that this twice arch wall just forces the front portion, combustion chamber and the abundant mixed intensified burning of air by two wall passageways.When flue dust is come out and taken a sudden turn by the passageway when upwards flowing, further burn on the red-hot coke and be fixed up a part of dust because action of centrifugal force drops on a part of flue dust and unburnt carbon particle.(2) under the situation of combustor exit smokestack structure and position permission, link together at place's setting of outlet smokestack and rear arch, the shaped form arch of similar cyclone separator is isolated a part of dust when forcing flue dust to do to place motion, reaches the purpose of further dedusting.(3) be provided with in the combustion chamber across this chamber, the lower end is near the coal seam and keep certain distance, the folding cigarette arch wall that the upper end is connected with furnace roof.This wall is built into refractory material, the corresponding position that the coke burning zone is not held on fire grate, its position.This arch wall is to be provided with under the situation that can not or not need to be provided with two arch walls.Of this sort arch wall is arranged on the cant reciprocal grate, but different with this scheme indication folding cigarette arch wall.Its reason one is because cant reciprocating-grate boiler combustion chamber back space is very big, and retaining cigarette wall is set in order to stop the upper smoke air communication; The 2nd, the sort of wall is arranged on the rear portion of combustion chamber, is the very big effect that does not have the said folding cigarette of this scheme arch wall of slag and opening during the following normal combustion of wall.(4) two groups of overfire air devices up and down are set on combustion chamber face arch and front wall.The medium of secondary wind can be selected the medium of air, steam or both mixing for use.The structure of overfire air device is made up of airduct, nozzle.Design is the purpose of two groups of overfire air devices up and down, be to adapt to the variation of boiler load big rise and big fall and coal, that is to say when boiler load changes significantly or the gaseous combustible thing, when the suspension combustible is too much, also can make the burning of these combustibles fully, and play the effect of depositing dust in the stove.The medium one group selection air of two kinds of secondary wind generally speaking, another group selection steam.Select for use the nozzle of steam secondary wind to be designed to adjustable angle.Its main components is to do the secondary air channel of shouldering the bar motion.One end of this pipe is welded with nozzle (being placed in the ad hoc hole of furnace wall), and flexible pipe is housed the other end and jet chimney is connected.In order this pipe to be done shoulder the bar motion adjusting the nozzle angle, in that being housed, an end of flexible pipe (medium upstream end) is welded with two iron plates with holes.First iron plate is welded in the upside of pipe, is used for connecting the mechanism that adjusts the nozzle angle.Second block of plate is welded in the downside of pipe, be used for supporting and fixedly secondary air channel (be fixed on the support with axle, this is the moving fulcrum of secondary air channel) this pipe is done shoulder bar and is moved.First block of plate near secondary wind medium upstream end is movably connected with crank, and crank is fixed on axle and goes up (spool be placed on the bearing bracket stand).One end of axle is equipped with actuating unit, and when adopting manually-operated, this mechanism is an operating grip, and rotary handle drives axle and rotates, and crank-swinging is done secondary air channel and shouldered the bar motion, reaches the purpose of adjusting the nozzle angle.When adopting driven by power, this actuating unit is that electric operator (is made up of motor and speed changer.Can select the sort of electric operator of switch air door of fan for use), its effect is the same with manual operation.As for the concrete sizes such as position of position, angle and the moving fulcrum of secondary air channel, should when the design boiler, determine.Selected moderate angle when the original angle of nozzle designs, adjusting range is little, the variation when flexible pipe can adapt to the angle change.(5) secondary air duct and spray wind hole are set in folding cigarette arch wall, its structure is to make with special refractory material, and secondary air duct and spray wind hole are manufactured in the refractory material.This fire resistive material product be secondary air duct be again the part of folding cigarette arch wall.Secondary air duct and stove exogenous wind pipeline are connected.(6) setting involves brick between twice folding cigarette arch wall.This brick is common refractory brick, and staggered dressing is between Liang Qiang, and its effect is the fastness that strengthens two folding cigarette arch walls, also plays the effect that flue gas is strengthened burning of stirring.

Owing to adopt such scheme, can receive the effect of smoke elimination in the stove, dedusting, province's coal during burning in boiler bituminous coal.Implement above scheme and adopt refractory material, simple in structure more.

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the vertical section structural map of first embodiment of the present utility model.

Fig. 2 is the vertical section structural map of second embodiment of the present utility model.

Fig. 3 is the vertical section structural map of the 3rd embodiment of the present utility model.

Among the figure 1, movable fire grate 2, coal seam (grate) 3, coal lock 4, coal bunker 5, face arch 6,7, overfire air device 8, furnace roof (heating surface) 9, rear arch 10, the smoke wall 11 of rear arch front end,

furnace wall

12,13, folding cigarette arch wall 14, the shaped form arch 15 of similar cyclone dust collectors, involve brick 16, secondary air duct and spray wind hole.

In Fig. 1, the flue gas of front portion, combustion chamber is under the effect of induced draft blower withdraws power, flow from top to bottom through rolling over cigarette arch wall (12,13) passageway and involving brick (15), combustible in the flue gas forces to mix with air in the passageway and burns, upwards flow at place zig zag then near grate, the flammable grit that carry in the flue gas this moment drops on after-flame on the red-hot coke layer, soot particle is attached on the slag, the shaped form arch (14) of the similar cyclone separator of flue gas process flows out the outlet smokestack at last, and the dust in the flue gas is separated owing to action of centrifugal force at this moment.Find out that from above the smoke abatement and dust control energy-saving effect is relatively good in first embodiment stove.

Second embodiment shown in Figure 2 compares with first embodiment, and except that not having curve arch (14), other structures are identical with first embodiment.This scheme is suitable for use in the lower combustion chamber, on firework tube boiler.

The 3rd embodiment shown in Figure 3 and the 2nd embodiment different places be only to adopt a folding cigarette arch wall (13), this scheme is applicable to burns on the short stove of volatile matter coal on the low side or fire grate.

Embodiment should be because of furnace type structure, because of coal, because of the enforcement of boiler operatiopn characteristics suiting measures to different conditions.All energy-conservation measure of the smoke abatement and dust control use of can arranging in pairs or groups in the stove.Select the medium of which kind of secondary wind for use and whether install the device of adjusting nozzle angle and be decided by operating condition.Cigarette arch wall bottom be should prevent to roll in the boiler operatiopn and a large amount of coke or slag accumulated.

Claims

1, the smoke abatement and dust control energy saver has compositions such as fire grate, coal bunker, coal lock, face arch, preceding overfire air device, rear arch, furnace roof (heating surface) furnace wall in the stove, it is characterized in that:

(1) in the combustion chamber, is provided with across this chamber, and keep the twice of certain distance to roll over the cigarette arch wall, and wherein the front is close coal seam, lower end together, upper end and furnace roof keep the folding cigarette arch wall of a segment distance, after be that lower end and coal seam keep big distance, the folding cigarette arch wall that the upper end is connected with furnace roof together;

(2) be provided with the shaped form arch wall of the similar cyclone duster structure that links together with rear arch at combustor exit smokestack place;

(3) be provided with in the combustion chamber across this chamber, the lower end is near the coal seam and keep certain distance, the folding cigarette arch wall that the upper end is connected with furnace roof;

(4) on combustion chamber face arch and front wall, be provided with two groups of overfire air devices up and down;

2,, it is characterized in that rolling over and be provided with secondary air duct and spray wind hole in the cigarette arch wall according to smoke abatement and dust control energy saver in the said stove of claim 1;

3,, it is characterized in that being provided with between the twice foldings cigarette arch wall and involve brick according to smoke abatement and dust control energy saver in the said stove of claim 1;

4, according to smoke abatement and dust control energy saver in the said stove of claim 1, it is characterized in that being equipped with on the overfire air device device that can adjust secondary wind nozzle angle.