CN211119338U

CN211119338U - Double-rotational-flow single-heat-storage flat flame burner

Info

Publication number: CN211119338U
Application number: CN201922286642.3U
Authority: CN
Inventors: 陈欣; 吴波; 张玉宝
Original assignee: Shandong Wanfang Kiln Engineering Technology Co ltd
Current assignee: Shandong Wanfang Kiln Engineering Technology Co ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-07-28
Anticipated expiration: 2029-12-17

Abstract

The utility model provides a flat flame nozzle of single heat accumulation of two whirl, includes the casing, is provided with the air flue gas chamber and the burning chamber of intercommunication in the casing, and air flue gas pipeline is connected on air flue gas chamber upper portion, and the bottom of air flue gas chamber is tangent with the circumference in burning chamber, is provided with the gas admission way in the bottom in air flue gas chamber on the casing, and the gas admission way is tangent with the circumference in burning chamber, is provided with the ignition nozzle that stretches into the burning chamber on the casing. This nozzle the utility model discloses an inside masonry structure of nozzle makes the gaseous whirl of realizing of nozzle inner chamber, has reduced accessories such as universal use spinning disk, has reduced nozzle preparation and maintenance cost. Through the inside double helix structural design of nozzle, make the two rotatory inflow combustion chamber of air and gas, when increasing the rotatory speed of combustion intracavity air current, make the better misce bene of air and gas, improve the combustion efficiency of gas, flame length in the reduction furnace chamber makes the interior thermally equivalent of furnace chamber to can reduce the design size of furnace body.

Description

Double-rotational-flow single-heat-storage flat flame burner

Technical Field

The utility model relates to a single heat accumulation flat flame nozzle belongs to nozzle technical field.

Background

At present, a single heat accumulation flat flame burner mainly utilizes a mode of installing an axial vane type or volute type swirler to enable air and fuel gas to be sprayed out in a swirling mode, the internal structure of the burner is complex, and accessories are complex. In the other type of burner, fuel is sprayed at a high speed through a necking-shaped spray hole, only tangential air entering a combustion cavity by air is utilized to form swirl gas, the gas enters from the axial direction of the combustion cavity, the gas and the air are not uniformly mixed, and the combustion efficiency of the gas is low.

The heat accumulating type double-cyclone flat flame burner disclosed by CN201715514U is characterized in that a heat accumulator is arranged in a circular heat-insulating heat-accumulating box body, a loading and unloading heat accumulator cover, a cold air inlet pipe and a smoke exhaust pipe are arranged on the side wall of the circular heat-insulating heat-accumulating box body, the top end of the circular heat-insulating heat-accumulating box body is communicated with a horn-shaped burner block, a double-cyclone burner is arranged in the horn-shaped burner block, and a cold air pipe is arranged at one end of the double-cyclone burner. The 0009 th paragraph of the specification records that one end of the double-swirl burner 3 is provided with the cold air pipe 5 and the cold air inlet 4, but the structure of the double-swirl burner 3 is not described in detail, and the attached figure 2 shows that the double swirl is realized by arranging swirl sheets (swirl devices) in the air and gas pipes, so that the structure is complex and the maintenance is inconvenient. The problems of the existing flat flame burner are still not solved substantially.

CN106122946A discloses a double swirl flat flame burner, which realizes swirl by a swirler.

SUMMERY OF THE UTILITY MODEL

For further simplifying flat flame nozzle inner structure, the shape characteristic of fan-shaped, flat flame of reinforcing flat flame nozzle improves the misce bene degree of air and gas and improves gas combustion efficiency, the utility model provides a simple structure maintains simple and direct double vortex single heat accumulation flat flame nozzle, makes the gaseous whirl of realizing of nozzle inner chamber through the inside masonry structure of nozzle.

The utility model discloses a flat flame nozzle of single heat accumulation of bispin flow takes following technical scheme:

the burner comprises a shell, wherein an air flue gas cavity and a combustion cavity which are communicated with each other are arranged in the shell, the bottom end of the air flue gas cavity is tangent to the circumference of the combustion cavity, a gas inlet channel is arranged at the bottom of the air flue gas cavity on the shell and tangent to the circumference of the combustion cavity, and an ignition burner which stretches into the combustion cavity is arranged on the shell.

A circular boss is arranged at the inner end (connected with the air flue gas cavity) of the combustion cavity in the shell, so that the inner end of the combustion cavity forms an annular cavity.

And the upper part of the air flue gas cavity is connected with an air flue gas pipeline.

And a heat accumulator is arranged in the air flue gas cavity.

The air flue gas cavity and the combustion cavity are vertical, the air flue gas cavity is vertical, and the combustion cavity is horizontal.

The outer end (flame-spraying end) of the combustion cavity is a bell mouth, the bell mouth is adapted to the outward expansion rule of the rotary airflow due to the action of centrifugal force, the steering resistance of the airflow is reduced, the flowing characteristic of the attached wall is enhanced, and then a larger fan-shaped and flat flame shape is formed.

The axial directions of the combustion cavity and the ignition burner are consistent.

The axis of the combustion cavity is vertical to the axis of the gas inlet channel.

The axis of the air flue gas cavity, the axis of the fuel gas inlet channel and the axis of the combustion cavity are perpendicular to each other, so that the best effect of air and fuel gas rotational flow speed and mixing is achieved.

The burner does not realize the rotational flow of air or fuel gas by using rotational flow devices such as a cyclone device and a rotational flow sheet, but realizes the dual-rotation flow of the air and the fuel gas into the combustion cavity by the design of the internal double-helix structure of the burner. The inside air flue gas chamber and the gas inlet channel of the burner are communicated with the combustion chamber tangentially, so that a double-swirl structure is formed. This double-swirl structure has increased the fan-shaped, flat flame's of flat flame nozzle shape, and this double-swirl structure makes air and gas tangential entering combustion chamber, forms double-swirl, increases the even degree that air and gas mix, improves the combustion efficiency of gas, and double-swirl has still increased the radial velocity of flow of nozzle spout flame, forms more flat and bigger flame shape, reduces flame length in the furnace chamber, makes the interior thermally equivalent of furnace chamber to can reduce the design size of furnace body.

The utility model discloses an inside masonry structure of nozzle makes the gaseous whirl of realizing of nozzle inner chamber, and simple structure maintains portably, has reduced accessories such as the spinning disk of universal use, has reduced nozzle preparation and maintenance cost. Through the inside double helix structural design of nozzle, make the two rotatory inflow combustion chamber of air and gas, when increasing the rotatory speed of combustion intracavity air current, make the better misce bene of air and gas, improve the combustion efficiency of gas, flame length in the reduction furnace chamber makes the interior thermally equivalent of furnace chamber to can reduce the design size of furnace body.

Drawings

Fig. 1 is a schematic structural view of the dual-cyclone single regenerative flat flame burner of the present invention.

Fig. 2 is a sectional view a-a in fig. 1.

In the figure: 1. the gas-fired boiler comprises an air flue gas pipeline, a shell, an air flue gas cavity, a gas inlet channel, an ignition burner, a combustion cavity, a horn mouth, a furnace body, a heat accumulator, a circular boss and an annular cavity, wherein the shell is 2, the air flue gas cavity is 3, the gas inlet channel is 4, the ignition burner is 5, the combustion cavity is 6, the horn mouth is 7, the furnace body is 8, the heat accumulator is 9.

Detailed Description

The utility model discloses a two whirl list heat accumulation flat flame nozzles rely on the internal structure to make the revolve of air and gas to, need not add the whirl piece inside the nozzle just can realize the two whirl of air and gas. The structure of which is shown in fig. 1 and 2 and comprises a housing 2. An air flue gas cavity 3 and a combustion cavity 6 which are communicated with each other are arranged in the shell 2, the air flue gas cavity 3 and the combustion cavity 6 are in a vertical state, the air flue gas cavity 3 is in a vertical direction, and the combustion cavity 6 is in a horizontal direction. The upper part of the air smoke cavity 3 is connected with an air smoke pipeline 1. A circular boss 10 is arranged at the inner end (the joint with the air flue gas cavity 3) of the combustion cavity 6 in the shell 2, so that the section of the inner end of the combustion cavity 6 forms an annular cavity 11. The outer end of the combustion cavity 6 is a bell mouth 7, the bell mouth is adapted to the outward expansion rule of the rotary airflow due to the action of centrifugal force, the steering resistance of the airflow is reduced, the wall-attached flow characteristic is enhanced, and then a larger fan-shaped and flat flame shape is formed.

The lower end of the air flue gas chamber 3 is tangential to the annular chamber 11 (see figure 2). The housing 2 is provided with a gas inlet 4 at the bottom of the air flue gas cavity 3, and the gas inlet 4 is tangential to the annular cavity 11 (see fig. 2). An ignition burner 5 extending into the combustion chamber 6 is arranged on the shell 2, and the ignition burner 5 is fixed through bolts. The axial directions of the combustion chamber 6 and the ignition burner 5 are consistent and can also coincide. The axis of the combustion chamber 6 is perpendicular to the axis of the gas inlet channel 4. A heat accumulator 9 is arranged in the air and flue gas cavity 3, and heat is accumulated through flue gas and then the entering air is heated.

The axial line of the air flue gas cavity 3, the axial line of the gas inlet channel 4 and the axial line of the combustion cavity 6 are mutually perpendicular, so that the optimal air flow rotating speed and mixing effect are achieved.

Because air and fuel gas enter the combustion chamber 6 tangentially through the air-flue gas chamber 3 and the fuel gas inlet 4 respectively, a double-swirl structure is formed. This double-swirl structure has increased fan-shaped, the flat flame's of flat flame nozzle shape, increases the even degree that air and gas mix, improves the combustion efficiency of gas. In addition, the air is preheated by heat accumulation, so that the combustion efficiency can be improved, the heat value is increased, and the energy is saved.

The burner is mounted on the furnace body 8 through the casing 2. Air enters the bottom of the air flue gas cavity 3 through the air flue gas pipeline 1, fuel gas enters the bottom of the air flue gas cavity 3 through the fuel gas inlet channel 4, and the air and the fuel gas are mixed and enter the combustion cavity 6. Air and gas tangentially enter a combustion cavity 6 through an air flue gas cavity 3 and a gas inlet channel 4 respectively to form double rotational flows, ignition is performed through an ignition burner 5, and the gas is combusted to form flat flame. The double rotational flows increase the radial flow velocity of the flame at the nozzle of the burner, form a flatter and bigger fire plate, reduce the length of the flame in the furnace chamber, enable the furnace chamber to be heated uniformly, and reduce the design size of the furnace body 8. The flue gas that the burning produced is discharged by air flue gas chamber 3, heats heat accumulator 9 simultaneously, carries out the heat accumulation, reheats the air that gets into.

Claims

1. The utility model provides a flat flame nozzle of single heat accumulation of two whirl, includes the casing, characterized by, is provided with the air flue gas chamber and the burning chamber of intercommunication in the casing, and the bottom in air flue gas chamber is tangent with the circumference in burning chamber, is provided with the gas admission way in the bottom in air flue gas chamber on the casing, and the gas admission way is tangent with the circumference in burning chamber, is provided with the ignition nozzle that stretches into burning chamber on the casing.

2. The dual swirl single regenerative flat flame burner of claim 1, wherein a circular boss is provided in the housing at the inner end of the combustion chamber, such that the inner end of the combustion chamber forms an annular chamber.

3. The dual-swirl single-regenerative flat-flame burner of claim 1, wherein the upper portion of the air flue gas chamber is connected to an air flue gas pipe.

4. The dual swirl single regenerative flat flame burner of claim 1, wherein the air flue gas chamber and the combustion chamber are vertical, the air flue gas chamber is vertical, and the combustion chamber is horizontal.

5. The dual-swirl single-regenerative flat-flame burner of claim 1, wherein a heat accumulator is disposed in the air flue gas cavity.

6. The dual swirl single regenerative flat flame burner of claim 1, wherein the air flue gas chamber and the combustion chamber are vertical, the air flue gas chamber is vertical, and the combustion chamber is horizontal.

7. The dual swirl single regenerative flat flame burner of claim 1, wherein the outer end of the combustion chamber is flared.

8. The dual swirl single regenerative flat flame burner of claim 1, wherein the combustion chamber is aligned with the axis of the ignition burner.

9. The dual swirl single regenerative flat flame burner of claim 1, wherein the axis of the combustion chamber is perpendicular to the axis of the gas inlet.

10. The dual swirl single regenerative flat flame burner of claim 1, wherein the axis of the air flue gas chamber, the axis of the gas inlet and the axis of the combustion chamber are perpendicular to each other.