CN2164502Y

CN2164502Y - Mechanical stirring chain furnace

Info

Publication number: CN2164502Y
Application number: CN 93218131
Authority: CN
Inventors: 朱建宁; 张晓鹏; 王妍芄; 周玉铭
Original assignee: Xian Jiaotong University
Current assignee: Xian Jiaotong University
Priority date: 1993-07-07
Filing date: 1993-07-07
Publication date: 1994-05-11
Anticipated expiration: 2003-07-07

Abstract

The utility model relates to a novel chain furnace, which comprises a furnace wall, a furnace chamber in the furnace wall, a water-cooled wall of the furnace chamber, a boiler barrel communicated with the water-cooled wall of the furnace chamber, various heating surfaces and a grate below the furnace chamber. The lower part of the grate is provided with a mechanical coalbed stirrer, the coalbed in the chain furnace is stirred by the action of the mechanical coalbed stirrer in order to strengthen the diffusion of oxygen to the surfaces of combustion coal granules, thus the combustion can be speeded up, the mechanical incomplete combustion loss of a boiler can be decreased, the uniformity of the longitudinal air distribution can be improved, and consequently, the boiler efficiency can be enhanced.

Description

Mechanical stirring chain furnace

The utility model relates to a kind of boiler, particularly a kind of chain furnace.

Chain furnace is present the most widely used domestic Industrial Boiler, and its combustion system is the grate firing mode.Static relatively because of the coal seam on the traveling-grate stoker, be provided with relative motion up and down between the coal seam, and be that single face catches fire; In the after-flame stage, top chimney arch and flame radiation effect are subjected to the obstruction of lime-ash and are difficult to go deep into bottom, and (boiler unburned carbon loss q4 is chain furnace 8-12% by standard recommendation for height than other combustion system for the coal seam heating difficulty at grate surface place, boiler slag carbon content; Reciprocating furnace 7-10%; Handwarmer 6-7%); In recent years, along with the increase of smalls ratio in the coal supply, the downward heat-transfer capability in the chain furnace coal seam descends, the boiler slag carbon content surge, according to our statistics, the boiler slag carbon content of general actual motion boiler is up to more than 30%, and the boiler unburned carbon loss is more than 15%.Therefore, how to overcome the intrinsic weakness of mode chain furnace combustion mode, under the actual motion condition, guarantee the abundant after-flame in coal seam, have very big realistic meaning for our energy conservation from now on.

The purpose of this utility model is to provide a kind of chain furnace that has the mechanical layer perturbator, be characterized in, in chain furnace grate firing process, utilize mechanical system to come disturbance chain furnace coal seam, make bed surface from the appropriate location, the hole of burning coal layer obtains redistribution, and the relative motion of interlayer coal grain, and friction and bump take place, helping grey shell peels off, thereby strengthened the diffusion of oxygen, accelerated burning velocity, strengthened the mutual heat-transfer capability between the coal seam to coal combustion grain surface, make the combustion reaction aggravation, shorten the tail-off time, and the uniformity of fire grate cross air dispatching is had greatly improved, make under the condition of same fire grate length, boiler slag carbon content has decline by a relatively large margin, the boiler unburned carbon loss reduces, and has improved boiler efficiency, thereby obtains considerable economic.

The utility model comprises a furnace wall, burner hearth, the fire grate, the fire grate bottom that a water-cooling wall are set around the burner hearth and are attached thereto logical drum and lower furnace portion are provided with mechanical coal seam perturbator, thereby said mechanical coal seam perturbator is one can drive by driving wheel and pull out wheel and rotate the mechanism that realizes the coal seam of the burning on the fire grate is implemented disturbance.

During the utility model work, pulling out wheel by the perturbator drive chain drive of mechanical coal seam perturbator under fire grate stirs, promote the fire grate chip by pulling out wheel, thereby make the porosity of burning coal layer and the coal cinder of different burning degrees obtain redistribution, also improved simultaneously fire grate cross air dispatching uniformity, and the grain relative motion of interlayer coal and generation friction and bump, helping grey shell peels off, strengthened the diffusion of oxygen, accelerated burning velocity, strengthened the downward heat-transfer capability in coal seam to coal combustion grain surface, the final after-flame that promotes the coal seam, reduce boiler slag carbon content, the unburned carbon loss of boiler reduces, and causes boiler efficiency to improve.

Fig. 1 is a structure principle chart of the present utility model.

Fig. 2 pulls out wheel sheet front view.

Below in conjunction with accompanying drawing structural principle of the present utility model and operation principle are done detailed explanation.

With reference to Fig. 1,2, the utility model comprises a furnace wall (6), burner hearth (4), the water-cooling wall that burner hearth (4) is provided with on every side and be attached thereto logical drum (7) and burner hearth (4) under fire grate (1), fire grate (1) bottom is provided with mechanical coal seam perturbator (2), mechanical kiln floor perturbator (2) is arranged in the wind storehouse (chamber) (5), said mechanical coal seam perturbator (2) comprises a driving wheel (8) that matches with fire grate (1), driving wheel (8) is gone up one of configuration, be with some wheel sheets (3) that pull out on the axle, said pulling out on the wheel sheet (3) has some teeth (9) that pull out.

When fire grate (1) rotates, fire grate (1) drives driving wheel (8) and rotates, driving wheel (8) is driven by axle and pulls out wheel sheet (3) and rotate, and the tooth (9) that pulls out that pulls out on the wheel sheet (3) makes fire grate chip knee-action on the fire grate (1), thereby has realized the disturbance to the coal seam.

According to the 01t/h grate furnace of the utility model design, compared with prior art, boiler slag carbon content descends about 10%, and boiler efficiency improves more than 2%, and can apply.

Scope: mechanical coal seam perturbator is installed in the undergrate plenum chamber, generally is configured in second to the 4th air compartment, and disturbance is pulled out wheel and is at least 2 points with the contact point of each fire grate chip, and the number of teeth of pulling out of pulling out wheel is equal to or greater than 8.

Structure of the present utility model can be applicable on the 05t/h-75t/h chain furnace, uses this device can make boiler slag carbon content decline 7-15%, and the separate unit boiler efficiency can improve more than 2%, and need not special power source.

Power source: derive from the drive chain that fire grate drives.

Material: mechanical coal seam perturbator is made by general carbon steel.

Claims

1, mechanical disturbance type chain furnace, comprise the water-cooling wall that is provided with around furnace wall, burner hearth, the burner hearth, be attached thereto the logical drum and the fire grate of lower furnace portion, feature of the present utility model is, the bottom of fire grate is provided with mechanical coal seam perturbator, and said mechanical coal seam perturbator comprises a driving wheel that matches with fire grate, and configuration is one on the driving wheel, be with some wheel sheets that pull out on the axle, said pulling out on the wheel sheet has some teeth that pull out.

2, mechanical disturbance type chain furnace according to claim 1 is characterized in that, said mechanical coal seam perturbator is configured in the air compartment under the fire grate.

3, according to claim 1,2 described mechanical disturbance type chain furnaces, it is characterized in that, said mechanical layer perturbator be configured in second with the 4th air compartment in.

4, mechanical disturbance type chain furnace according to claim 3 is characterized in that, what wheel was pulled out in said disturbance pulls out the number of teeth more than or equal to 8.

5, mechanical disturbance type chain furnace according to claim 3 is characterized in that, said disturbance is pulled out the contact point of each fire grate chip of wheel more than or equal to 2 points.