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CN-224230006-U - Low-nitrogen burner and gas water heater

CN224230006UCN 224230006 UCN224230006 UCN 224230006UCN-224230006-U

Abstract

The utility model discloses a low-nitrogen burner which comprises a shell, wherein the other end of an airflow channel of the shell is provided with a plurality of fire port groups communicated with the airflow channel, and each fire port group comprises a first fire port and a second fire port. In each burner group, fuel gas forms a low-speed flow area at a first burner position through an air inlet and an air flow channel, fuel gas forms a high-speed flow area at a second burner position through the air inlet and the air flow channel, fuel gas realizes rich combustion in the low-speed flow area, fuel gas realizes lean combustion in the high-speed flow area, and NOx is further reduced, and the low-nitrogen burner is of an integral combustion structure, and has good sealing property, simple structure and lower cost. The utility model discloses a gas water heater which comprises the low-nitrogen burner, reduces the formation of NOx, and has the advantages of simple structure and lower cost.

Inventors

  • LIAO HANWEI
  • SHI YANLONG
  • WENG YUYANG

Assignees

  • 广东托米热能设备有限公司

Dates

Publication Date
20260512
Application Date
20250429

Claims (10)

  1. 1. A low nitrogen combustor, comprising: The shell is internally provided with a cavity to form an air flow channel, one end of the air flow channel is provided with an air inlet communicated with the air flow channel, the other end of the air flow channel is provided with a plurality of fire port groups communicated with the air flow channel, and each fire port group forms single-area combustion; The fire port group comprises a first fire port and a second fire port, the first fire port is arranged in the middle of the fire port group, and the second fire port is arranged at the periphery of the fire port group; The fuel gas passes through the air inlet and the air flow channel to form a low-speed flow area at the first fire hole position, and the fuel gas passes through the air inlet and the air flow channel to form a high-speed flow area at the second fire hole position.
  2. 2. The low nitrogen burner of claim 1, wherein the first burner has a greater caliber than the second burner.
  3. 3. The low nitrogen burner of claim 1, wherein in a group of said fire ports, said first fire port and said second fire port each exit gas toward a combustion center of combustion in the area to which they belong; The first fire port is used for discharging air along the longitudinal direction, and a baffle plate is arranged at the air discharging position of the second fire port so that the second fire port is used for discharging air along the transverse direction.
  4. 4. The low nitrogen burner of claim 2, wherein said fire port group further comprises a third fire port, said third fire port having a caliber greater than that of said second fire port, said third fire port being disposed at a location intermediate said fire port group; In one set of the fire ports, the third fire port is discharged toward a combustion center of combustion of the area to which the third fire port belongs, and the third fire port is discharged in a longitudinal direction.
  5. 5. The low nitrogen burner of claim 4, wherein said burner group further comprises a fourth burner, said fourth burner having a smaller caliber than said first burner and said fourth burner having a smaller caliber than said third burner, said fourth burner being disposed at a peripheral location of said burner group; In one of the fire port groups, the fourth fire port is discharged toward a combustion center of combustion of the belonging area, and the fourth fire port is discharged in a longitudinal direction.
  6. 6. The low-nitrogen burner of any of claims 1-5, wherein a flame transfer port is disposed between two adjacent sets of flame ports.
  7. 7. The low nitrogen burner of any of claims 1-5, wherein said gas flow path comprises a first path segment, a second path segment and a third path segment in communication with each other, said first path segment being disposed in a lateral direction, said second path segment being disposed in a longitudinal direction, said third path segment being disposed in a lateral direction; The air inlet is arranged on the first channel section, and the fire port group is arranged on the third channel section.
  8. 8. The low nitrogen combustor as recited in claim 7, wherein a first flow blocking protrusion is provided on the first passage section to form a first flow blocking area; And/or, a second flow blocking convex part is arranged on the second channel section so as to form a second flow blocking area; And/or, a third flow blocking convex part is arranged on the third channel section so as to form a third flow blocking area.
  9. 9. The low nitrogen burner of claim 7, wherein said third passage section has a large end and a small end, said third passage section has a large end adjacent said fire port group and a small end adjacent said second passage section.
  10. 10. A gas water heater comprising a low nitrogen burner as claimed in claim 1.

Description

Low-nitrogen burner and gas water heater Technical Field The utility model relates to the technical field of combustion equipment, in particular to a low-nitrogen combustor and a gas water heater. Background In the related art, the low-nitrogen combustion of the gas water heater generally uses a mode of thick-thin combustion or full-premixed combustion, and the like, and the atmospheric-like combustion mode generally controls the emission of nitrogen oxides by reducing power. The thick and thin combustion equipment that thick and thin combustion mode adopted always need be provided with thick burning passageway and thin burning passageway, thick burning passageway corresponds to be provided with thick burning entry and thick burning fire hole, thin burning passageway corresponds to be provided with thin burning entry and thin burning fire hole, thick gas burns at thick burning fire hole through thick burning entry, thick burning passageway, thin gas burns at thin burning fire hole through thin burning entry, thin burning passageway, this kind of mode needs to set up thick, thin two sets of combustion structures to realize thick and thin burning, overall structural design is comparatively complicated, the cost is higher. The full premix combustion mode refers to that before combustion, fuel gas and air are completely and uniformly mixed to form mixed fuel gas with optimal air-fuel ratio, and the mixed fuel gas is sent into a burner for combustion. Disclosure of utility model In order to overcome the defects of the prior art, one of the purposes of the utility model is to provide a low-nitrogen burner, wherein each burner group forms single-area combustion, a plurality of burner groups form a plurality of single-area combustion, combustion is more stable, in each burner group, fuel gas forms a low-speed flow area at a first burner position through an air inlet and an air flow channel, fuel gas forms a high-speed flow area at a second burner position through the air inlet and the air flow channel, fuel gas realizes rich combustion in the low-speed flow area, fuel gas realizes lean combustion in the high-speed flow area, and NOx is formed in a monolithic combustion structure, and the low-nitrogen burner has good sealing property, simple structure and lower cost. The second object of the present utility model is to provide a gas water heater, which adopts the low-nitrogen burner to reduce NOx formation, and has simple structure and low cost. One of the purposes of the utility model is realized by adopting the following technical scheme: A low nitrogen combustor, comprising: The shell is internally provided with a cavity to form an air flow channel, one end of the air flow channel is provided with an air inlet communicated with the air flow channel, the other end of the air flow channel is provided with a plurality of fire port groups communicated with the air flow channel, and each fire port group forms single-area combustion; The fire port group comprises a first fire port and a second fire port, the first fire port is arranged in the middle of the fire port group, and the second fire port is arranged at the periphery of the fire port group; The fuel gas forms a low-speed flow area at the first fire hole position through the air inlet and the air flow channel, and forms a high-speed flow area at the second fire hole position through the air inlet and the air flow channel. As an alternative embodiment, the first burner has a larger caliber than the second burner. As an alternative embodiment, in a group of fire ports, the first fire port and the second fire port both exit towards the combustion center of the combustion in the area to which they belong; The first fire port is used for discharging air along the longitudinal direction, and a baffle plate is arranged at the air discharging position of the second fire port so that the second fire port is used for discharging air along the transverse direction. As an alternative embodiment, the fire port group further comprises a third fire port, the caliber of the third fire port is larger than that of the second fire port, and the third fire port is arranged in the middle of the fire port group; In one group of fire ports, the third fire port is vented toward a combustion center of combustion of the zone to which it belongs, and the third fire port is vented in a longitudinal direction. As an alternative embodiment, the fire port group further comprises a fourth fire port, the caliber of the fourth fire port is smaller than that of the first fire port, the caliber of the fourth fire port is smaller than that of the third fire port, and the fourth fire port is arranged at the periphery of the fire port group; In one group of fire ports, the fourth fire port is vented toward a combustion center of combustion of the belonging area, and the fourth fire port is vented in a longitudinal direction. As an alternative embodiment, a fire transfer port is provided between two