CN210951303U

CN210951303U - Multi-combustion-surface water-cooling premixed gas combustor

Info

Publication number: CN210951303U
Application number: CN201921362475.XU
Authority: CN
Inventors: 沈炳元; 赵荣新
Original assignee: Zhejiang Unipower Boiler Co ltd
Current assignee: Zhejiang Liju thermal energy equipment Co.,Ltd.
Priority date: 2019-08-21
Filing date: 2019-08-21
Publication date: 2020-07-07
Anticipated expiration: 2029-08-21

Abstract

The utility model belongs to the technical field of combustion, in particular to a multi-combustion-surface water-cooling premixing gas burner, which comprises a plurality of combustion devices and a plurality of mixers arranged at the tail end of the burner, wherein the outlets of the mixers are communicated with the air inlet ends of the combustion devices in a one-to-one correspondence manner; the gas and the air all form premixed gas in the blender, and premixed gas burns at burner's the end of giving vent to anger and forms the combustion face, and a plurality of burners form a plurality of combustion faces. The utility model discloses a fan, a plurality of burner to dispose a plurality of blenders, form a plurality of combustion faces during a plurality of burner burns, on the basis that does not increase boiler number and fan, realize the high-power output of single boiler, with the full premix burning that realizes up to 35MW, simple structure simultaneously, it is small, with low costs.

Description

Multi-combustion-surface water-cooling premixed gas combustor

Technical Field

The utility model belongs to the technical field of the burning, concretely relates to is a many combustion faces water-cooling mixes gas burner in advance.

Background

The full premixed combustion is a mode of uniformly mixing air and gas in a mixing device in advance in proportion, and delivering the mixed premixed gas to a combustion device for combustion. The water-cooled premixed combustion is a full premixed combustion mode of cooling flame by water. Each full premix burner comprises a combustion fan, a set of gas valve, a mixer and a set of combustion device. The larger the volume of the mixing device, the more difficult it is to achieve uniform mixing. The larger the individual combustion device volume, the more difficult it is to achieve homogeneous combustion, and the greater the risk of backfire deflagration once problems arise. The two reasons result in that the power of a single burner of the full-premix combustion is limited, and according to data inquiry, the maximum power of the full-premix burner does not exceed 7MW up to now.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that the power of a single burner is limited in full premix combustion in the prior art, providing a multi-combustion-surface water-cooling premix gas burner.

In order to realize the technical purpose, the utility model adopts the following technical scheme:

a multi-combustion-surface water-cooling premixing gas burner comprises a plurality of combustion devices arranged at the tail end of the burner; the combustion device also comprises a plurality of mixers, and outlets of the mixers are correspondingly communicated with the air inlet end of the combustion device one by one; the gas and the air all form premixed gas in the blender, and premixed gas burns at burner's the end of giving vent to anger and forms the combustion face, and a plurality of burners form a plurality of combustion faces.

Further, the head end of the combustor is a fan, and an air inlet of each mixer is communicated with an outlet of the fan.

Further, a gas inlet of each mixer is communicated with a gas main pipeline through a gas pipeline; each gas pipeline is provided with a gas valve.

Furthermore, a water distribution chamber is arranged at the top end of each combustion device, and a water collection chamber is arranged at the bottom end of each combustion device; the water distribution chambers and the water collection chambers of all the combustion devices are communicated.

Further, along the flowing direction of the premixed gas, the gas outlet end of the combustion device sequentially comprises a cooling tube bank and a flame stabilizing tube bank; one end of the cooling tube bank is positioned in the water distribution chamber, and the other end of the cooling tube bank is positioned in the water collection chamber; one end of the flame stabilizing tube bank is positioned in the water distribution chamber, and the other end of the flame stabilizing tube bank is positioned in the water collection chamber.

Furthermore, the cooling tube row is formed by arranging a plurality of cooling tubes, and a first gap is formed between every two adjacent cooling tubes; the flame stabilizing tube row is formed by arranging a plurality of flame stabilizing tubes, and a second gap is formed between every two adjacent flame stabilizing tubes; the premixed gas is combusted after passing through the first gap, and then forms stable combustion flame after passing through the second gap.

Further, the center of the flame stabilizing tube is aligned with the adjacent first slit.

Further, the cooling pipe is in a rectangular column shape or a cylindrical shape or a fin pipe type, and the flame stabilizing pipe is in a rectangular column shape or a cylindrical shape or a fin pipe type.

Furthermore, the medium in the cooling pipe and the medium in the flame stabilizing pipe are both water.

Compared with the prior art, the utility model has the beneficial technical effects that:

the utility model adopts a plurality of combustion devices and a plurality of mixers, a plurality of combustion surfaces are formed when the plurality of combustion devices are combusted, and the high-power output of a single boiler is realized on the basis of not increasing the number of boilers and fans, so as to realize the full-premix combustion of 35MW, and meanwhile, the utility model has the advantages of simple structure, small volume and low cost;

two, the utility model discloses burning flame is more stable, can reduce the temperature of premixing gas burning flame simultaneously, and then reduce the NOx content that contains in the emission flue gas.

Drawings

FIG. 1 is a schematic connection diagram of a multi-combustion-surface water-cooled premixed gas burner according to the present embodiment;

FIG. 2 is an overall structure diagram of a multi-combustion-surface water-cooling premixed gas burner according to the present embodiment;

fig. 3 is a structure diagram of the gas outlet end of the combustion apparatus of the present embodiment.

The device comprises a combustion device 1, a mixer 2, a fan 3, a gas pipeline 4, a gas main pipeline 5, a gas valve 6, a water distribution chamber 7, a water collection chamber 8, a cooling tube bank 9, a flame stabilizing tube bank 10, a cooling tube 11, a flame stabilizing tube 12, a first gap 13 and a second gap 14.

Detailed Description

The invention will be further described with reference to specific examples, but the scope of the invention is not limited thereto.

As shown in fig. 1-3, the water-cooled premixed gas burner with multiple combustion surfaces of the present embodiment includes multiple combustion devices 1 and multiple mixers 2 disposed at the tail end of the burner, wherein outlets of the mixers 2 are communicated with air inlet ends of the combustion devices 1 in a one-to-one correspondence manner, the gas and the air all form premixed gas in the mixers 2, the premixed gas is injected into the combustion devices 1 from the mixers 2, the premixed gas is combusted at the air outlet ends of the combustion devices 1 to form combustion surfaces, and the multiple combustion devices 1 form multiple combustion surfaces. This embodiment adopts a plurality of burner 1 to dispose a plurality of blenders 2, form a plurality of combustion faces during a plurality of burner 1 burns, on the basis that does not increase boiler number and fan, realize the high-power output of single boiler, simple structure, it is small, with low costs, overcome prior art in single boiler can't realize the problem of high-power output. Meanwhile, the air outlet end where the combustion surface is located is formed by arranging a plurality of pipelines, and cooling media are filled in the pipelines, so that the combustion flame can be cooled, and the content of NOx in the discharged flue gas is reduced. The number of the combustion devices 1 in the embodiment is three, and the combustion devices are symmetrically arranged along the center of the combustor, and the shells of the adjacent combustion devices 1 are connected with each other to form a whole. The specific number of the combustion devices 1 can be flexibly adjusted according to the requirements.

The head end of the combustor is a fan 3, and an air inlet of each mixer 2 is communicated with an outlet of the fan 3. The gas inlet of each mixer 2 is communicated with a gas main pipe 5 through a gas pipe 4. Each gas pipeline 4 is provided with a gas valve 6. When the combustor runs, the frequency of the fan 3 is controlled according to the required heat, and the opening size of each gas valve 6 is controlled through the frequency of the fan 3. When the required heat quantity is reduced, the operation frequency of the fan 3 is reduced, and the opening degree of each gas valve 6 is reduced along with the reduction of the operation frequency of the fan 3, so that the fire head size of the combustion surface 3 is reduced. When the required heat quantity is increased, the operation frequency of the fan 3 is increased, and the opening degree of each gas valve 6 is increased along with the increase of the operation frequency of the fan 3, so that the size of the fire head of the combustion surface is increased. The opening degree of each gas valve 6 can be independently adjusted to control the size of the fire head of a single combustion surface. In order to facilitate the circulation of the cooling medium, a water distribution chamber 7 is arranged at the top end of each combustion device 1, and a water collection chamber 8 is arranged at the bottom end of each combustion device. The water distribution chamber 7 and the water collection chamber 8 of all the combustion devices 1 are communicated.

As shown in fig. 2, the outlet end of the burner 1 comprises, in succession, in the direction of flow of the premixed gas, a cooling tube bank 9 and a flame holding tube bank 10. One end of the cooling tube bank 9 is positioned in the water distribution chamber 7, and the other end is positioned in the water collection chamber 8. One end of the flame stabilizing tube bank 10 is positioned in the water distribution chamber 7, and the other end is positioned in the water collection chamber 8. The cooling tube bank 9 is formed by arranging a plurality of cooling tubes 11, and the flame stabilizing tube bank 10 is formed by arranging a plurality of flame stabilizing tubes 12. The water diversion chamber 7, the water collection chamber 8, the cooling pipe 11 and the flame stabilizing pipe 12 are all filled with cooling medium. The water distribution chamber 7 of one of the combustion devices 1 is provided with a cooling medium inlet, and the water collection chamber 8 is provided with a cooling medium outlet. The cooling medium is used to absorb heat from the combustion flame, thereby lowering the combustion temperature of the combustion flame.

A first gap 13 is formed between the adjacent cooling tubes 11, and a second gap 14 is formed between the adjacent flame stabilizing tubes 12. The premixed gas is combusted through the first gap 13 and then forms a stable combustion flame through the second gap 14. When the premixed gas passes through the first slit 13, the medium in the cooling pipe 11 can lower the temperature of the combustion flame, thereby suppressing the generation of NOx. After the combustion gas passes through the second gap 14, a negative pressure is formed at the outlet end of the second gap 14, and new unburned gas is re-combusted, so that the combustion flame is more stable. At the same time, the medium in the flame holding tube 12 may also lower the temperature of the combustion flame, further reducing the generation of NOx. To disperse the premixed gas and to make the combustion flame more stable, the center of the flame holder 12 is aligned with the adjacent first slit 13. The cooling pipe 11 is rectangular column or cylinder or fin tube type, and the flame stabilizing pipe 12 is rectangular column or cylinder or fin tube type. The medium in the cooling tube 11 and the medium in the flame holding tube 12 are both water.

The specific use process of this embodiment is as follows: firstly, opening a fan 3 to enable air sucked by the fan 3 to be uniformly distributed into each mixer 2, and simultaneously opening a gas valve 6 of one mixer 2 to enable gas to enter the mixer 2; the air in the mixer 2 and the fuel gas are mixed into the required premixed gas according to the set air-fuel ratio; secondly, the premixed gas enters the combustion device 1 from the mixer 2 and is combusted at the air outlet end of the combustion device 1 to form a combustion surface, and after the combustion flame is stable, the gas valve 6 of the other mixer 2 is opened; sequentially opening each gas valve 6 to ensure that the gas outlet end of each combustion device 1 forms stable combustion flame successively; and finally, adjusting the frequency of the fan 3 and/or the opening of the gas valve 6, and controlling the combustion intensity of the combustion surface.

The number of this embodiment fan 3 is one, 2 parallelly connected of several blender, 1 parallelly connected of several burner, 2 all communicate with fan 3 of each blender, fan 3 passes through blender 2 and is connected with burner 1, form a plurality of combustion faces during the combustion of a plurality of burners 1, on the basis that does not increase boiler number and fan 3, realize the high-power output of single boiler, in order to realize the full premix burning up to 35MW, simple structure simultaneously, small, it is with low costs.

The embodiments of the present invention have been described in detail, and those skilled in the art can easily understand that there are various changes in the embodiments according to the idea of the present invention, and such changes should be considered as the protection scope of the present invention.

Claims

1. The utility model provides a many combustion faces water-cooling mixes gas burner in advance which characterized in that:

comprises a plurality of combustion devices (1) arranged at the tail end of a combustor;

the combustion device is characterized by also comprising a plurality of mixers (2), wherein outlets of the mixers (2) are communicated with the air inlet end of the combustion device (1) in a one-to-one correspondence manner; the gas and the air form premixed gas in the mixer (2), the premixed gas is combusted at the gas outlet end of the combustion device (1) to form a combustion surface, and the plurality of combustion devices (1) form a plurality of combustion surfaces.

2. The multi-combustion surface water-cooled premix gas burner of claim 1, characterized in that: the head end of the combustor is a fan (3), and an air inlet of each mixer (2) is communicated with an outlet of the fan (3).

3. The multi-combustion surface water-cooled premix gas burner of claim 2, characterized in that: the gas inlet of each mixer (2) is communicated with a gas main pipeline (5) through a gas pipeline (4); each gas pipeline (4) is provided with a gas valve (6).

4. The multi-combustion surface water-cooled premix gas burner of claim 1, characterized in that: the top end of each combustion device (1) is provided with a water distribution chamber (7), and the bottom end is provided with a water collection chamber (8); the water distribution chambers (7) and the water collection chambers (8) of all the combustion devices (1) are communicated.

5. The multi-combustion surface water-cooled premix gas burner of claim 4, characterized in that: along the flowing direction of the premixed gas, the gas outlet end of the combustion device comprises a cooling tube bank (9) and a flame stabilizing tube bank (10) in sequence; one end of the cooling tube bank (9) is positioned in the water distribution chamber (7), and the other end is positioned in the water collection chamber (8); one end of the flame stabilizing tube bank (10) is positioned in the water distribution chamber (7), and the other end is positioned in the water collection chamber (8).

6. The multi-combustion surface water-cooled premix gas burner of claim 5, characterized in that: the cooling tube row (9) is formed by arranging a plurality of cooling tubes (11), and a first gap (13) is formed between every two adjacent cooling tubes (11); the flame stabilizing tube bank (10) is formed by arranging a plurality of flame stabilizing tubes (12), and a second gap (14) is formed between every two adjacent flame stabilizing tubes (12); the premixed gas is combusted after passing through the first gap (13), and then forms stable combustion flame after passing through the second gap (14).

7. The multi-combustion surface water-cooled premix gas burner of claim 6, characterized in that: the centers of the flame stabilizing pipes (12) are aligned with the adjacent first gaps (13).

8. The multi-combustion surface water-cooled premix gas burner of claim 6, characterized in that: the cooling pipe (11) is rectangular column-shaped or cylindrical or fin tube-shaped, and the flame stabilizing pipe (12) is rectangular column-shaped or cylindrical or fin tube-shaped.

9. The multi-combustion surface water-cooled premix gas burner of claim 8, characterized in that: the medium in the cooling pipe (11) and the medium in the flame stabilizing pipe (12) are both water.