CN201246869Y

CN201246869Y - Vertical boiler with smoke folding wall

Info

Publication number: CN201246869Y
Application number: CNU2008200412730U
Authority: CN
Inventors: 卞清泉; 李学洪
Original assignee: Special Equipment Safety Supervision Inspection Institute of Jiangsu Province Huaian Branch
Current assignee: Special Equipment Safety Supervision Inspection Institute of Jiangsu Province; Special Equipment Safety Supervision Inspection Institute of Jiangsu Province Huaian Branch
Priority date: 2008-08-11
Filing date: 2008-08-11
Publication date: 2009-05-27
Anticipated expiration: 2018-08-11

Abstract

The utility model discloses a vertical boiler with a fold smoke wall, wherein at least three-layer fold smoke walls which are crossly arranged on the lower portion of a hearth to form an S-shaped smoke gas channel, the first layer and the third layer fold smoke walls (2, 4) are installed on an internal furnace (5) on the lower portion of the hearth, and the second layer fold smoke wall (3) is installed on a fire grate (7) on a horizontal water tube arranged on the lower portion of the hearth, and the first layer, the second layer and the third layer fold smoke walls (2, 3, 4) can form the S-shaped smoke gas channel. The fold smoke wall is formed by inner reinforcing ribs and a refractory casting layer, wherein the inner reinforcing ribs are installed on the hearth or the fire grate (7) on the horizontal water tube, and the refractory casting layer is coated outside the reinforcing ribs to form the fold smoke wall. The utility model changes the burning structure, increases the smoke gas retention time, fully burns solid particles in smoke gas, improves the heat efficiency of the boiler, reduces the smoke gas emission, and reduces the pollution to the environment.

Description

A kind of vertical boiler with smoke wall

Technical field

The utility model relates to vertical boiler, is specifically related to a kind of vertical boiler with smoke wall.

Background technology

In recent years, the minitype vertical type coal-burning boiler has obtained using widely in productive life.Because the investment of this boiler is low, floor space is little, subsidiary engine and annex are few, so be subjected to the welcome of boiler applying unit deeply.According to incompletely statistics, the minitype vertical type coal-burning boiler accounts for more than 50% in industrial boilers in China, these minitype vertical type coal-burning boilers all are handwarmer basically, shortcoming is that boiler thermal output is very low, and there is not the smoke abatement and dust control facility, the phenomenon of over-emitting black exhaust remains serious, and its smoke dust discharge concentration substantially exceeds national environmental standard, causes serious atmosphere pollution.For improving the present situation of China's urban environment severe contamination, some big and medium-sized cities are made the inaccurate scatter fire of raw coal of boiler of low capacity in succession, must change the regulation of fuel oil or gas fired-boiler into.But along with the rising of oil fuel price, the user more and more is difficult to bear economically, so the eager expectation of people can have a kind of national requirements for environmental protection that both met, the coal-burning boiler that has higher thermal efficient again.For in time satisfying users' demand, part boiler manufacturer has produced the vertical boiler of band cleaner, smoke density is descended to some extent, but cleaner needs certain floor space, and drop into bigger, and can not produce any economic benefit concerning the user, so its application has a lot of limitation.

The vertical boiler over-emitting black exhaust, the thermal efficiency is low, smoke dust discharge concentration is high, causes the main cause of the problems referred to above to be:

1. the imperfect combustion of coal.Because the coal of handwarmer does not carry out continuously, thereby its combustion process has periodically inevitably.Fresh fuel drops into the initial stage, and the coal seam is the thickest, and flowing resistance is big, and it is less to advance air capacity, but this moment, fuel was in the heating, drying stage, required air quantity seldom, so air has affluence.Along with fuel temperature constantly raises, a large amount of volatile matters is separated out and is burnt, and coke enters the fierce burning phase, effectively air capacity does not satisfy needs far away, make burning be in anaerobic condition, cause incomplete combustion, and the phenomenon of chimney over-emitting black exhaust occurs, continuous burning along with fuel, the coal seam is attenuate gradually, and required air quantity is less, and flowing resistance reduces simultaneously, fire grate sucks air capacity to be increased, and occurs air excess again.

2. flue gas time of staying in burner hearth is shorter.Because vertical boiler is after burning on the fire grate, enter burner hearth immediately, the stroke that flows out boiler from the burner hearth to the flue gas is shorter, form flue gas " corridor " easily, solid particle in the flue gas is not fully burned in the passage of exhanst gas outlet at burner hearth, thereby cause smoke density height, boiler over-emitting black exhaust phenomenon.

3. the periodicity of vertical boiler combustion process makes incomplete combustion loss higher, and the time of staying of flue gas in burner hearth is shorter, and the solid particle in the flue gas fails to be fully burned, and causes the boiler thermal output of boiler low, simultaneously smoke density height, easily contaminated environment.

Summary of the invention

The purpose of this utility model is: a kind of vertical boiler with smoke wall is provided, changes burning structures, increase gas residence time, the solid particle in the flue gas is fully burnt, improve boiler thermal output, reduce smoke dust discharge concentration, alleviate the pollution to environment.

Technical solution of the present utility model: alternating expression is installed three layers of smoke wall and is formed S type exhaust gases passes at least below burner hearth, first and third layer of smoke wall is installed on the flue of burner hearth below, second layer smoke wall is installed on the horizontal water tube upper fire-grating of burner hearth below, and first, second and third layer smoke wall forms S type exhaust gases passes.

In a kind of vertical boiler with smoke wall of the present utility model, smoke wall is made up of interior muscle and fire-resistant LIFT, and interior muscle is installed on burner hearth or the horizontal water tube upper fire-grating, and the outside of interior muscle coats fire-resistant LIFT and forms smoke wall.

The utlity model has following advantage:

(1) setting of smoke wall allows flue gas S-type flow in burner hearth, has prolonged the flowing time of flue gas at burner hearth, in the flue gas not fully the solid particle of after-flame be fully burned, reduced solid unburned heat loss, improved boiler thermal output;

(2) smoke wall stirs flue gas in flowing increases, and the reinforcement hybrid perturbation has strengthened flow of flue gas intensity, makes CO, CH4, CO in the high-temperature flue gas ₂Mix Deng fully, burn away in burner hearth, this stirring also can be strengthened the heat exchange effect between flue gas and the flue, has strengthened burning;

(3) in the flue gas non-flammable dust because of smoke wall stop that layer by layer gravity will drop on the fire grate greater than the dust of buoyancy, nonflammable dust is dropped in the burner hearth, blocks dust enters atmosphere, owing to be provided with three layers of smoke wall, reduces smoke dust discharge concentration.

(4) fuel tolerance is strong, and various bituminous coal can use;

(5) boiler thermal output obviously improves, and the steam that produces as much economizes on coal about 5～10%;

(6) because coal consumption amount reduces, throw the frequent degree of coal and also reduce, reduced stoker personnel's labour intensity;

(7) smoke dust discharge concentration reduces, and has alleviated the pollution to environment.

(8) investment is less, instant effect.

Description of drawings

Fig. 1 is the utility model structural representation.

Among the figure: 1. lower fire grating, 2. first smoke wall, 3. second smoke wall, 4. the 3rd smoke wall, 5. flue, 6. shell, 7. horizontal water tube upper fire-grating, 8. upper furnace door, 9. in fire door, the 10.U type circle of getting a foothold, 11. lower furnace doors.

The specific embodiment

As shown in Figure 1, at least alternating expression is installed three layers of smoke wall and is formed S type exhaust gases passes below burner hearth, first and third layer of smoke wall 2,4 is installed on the flue 5 of burner hearth below, second layer smoke wall 3 is installed on the horizontal water tube upper fire-grating 7 of burner hearth below, and first, second and third layer smoke wall 2,3,4 forms S type exhaust gases passes.

In a kind of vertical boiler with smoke wall of the present utility model, smoke wall is made up of interior muscle and fire-resistant LIFT, and interior muscle is installed on burner hearth or the horizontal water tube upper fire-grating 7, and the outside of interior muscle coats fire-resistant LIFT and forms smoke wall.

Claims

1. vertical boiler with smoke wall, it is characterized in that: alternating expression is installed three layers of smoke wall and is formed S type exhaust gases passes at least below burner hearth, first and third layer of smoke wall (2,4) is installed on the flue (5) of burner hearth below, second layer smoke wall (3) is installed on the horizontal water tube upper fire-grating (7) of burner hearth below, and first, second and third layer smoke wall (2,3,4) forms S type exhaust gases passes.

2. a kind of vertical boiler with smoke wall according to claim 1 is characterized in that: smoke wall is made up of interior muscle and fire-resistant LIFT, and interior muscle is installed on burner hearth or the horizontal water tube upper fire-grating (7), and the outside of interior muscle coats fire-resistant LIFT and forms smoke wall.