CN-122015094-A - Fire row, combustor and gas water heating equipment

Abstract

The invention belongs to the technical field of combustion, and particularly discloses a fire grate, a burner and gas water heating equipment. The fire grate comprises an injection part with an injection channel, wherein a turbulent flow structure is convexly arranged on the inner wall of the injection channel along the direction of the central line of the injection channel so that the injection channel forms a turbulent flow channel part at the position of the turbulent flow structure, the turbulent flow structure comprises at least two turbulent flow parts arranged at intervals along the circumferential direction of the injection channel, the turbulent flow parts extend along the airflow flowing direction in the injection channel, and the turbulent flow parts are obliquely arranged so that the two ends of the turbulent flow parts are arranged at intervals along the circumferential direction of the injection channel. The invention can prolong the residence time of the fuel gas in the injection channel, improve the mixing effect of the fuel gas and air, and further improve the combustion sufficiency and the combustion stability.

Inventors

• ZHANG SHANGBING
• CHEN YUANYUAN
• GU YUQIANG
• LU XINHUI

Assignees

• 广东万和新电气股份有限公司

Dates

Publication Date

20260512

Application Date

20260413

Claims (13)

1. 1. The fire grate comprises an injection part (10) with an injection channel (1), and is characterized in that a turbulent flow structure (2) is convexly arranged on the inner wall of the injection channel (1) along the direction of the central line of the injection channel (1), so that the injection channel (1) forms a turbulent flow channel part (121) at the position of the turbulent flow structure (2); The vortex structure (2) comprises at least two vortex parts (21) which are arranged along the circumferential direction of the injection channel (1) at intervals, the vortex parts (21) extend along the flow direction of the air flow in the injection channel (1), and the vortex parts (21) are obliquely arranged so that the two ends of the vortex parts (21) are arranged at intervals in the circumferential direction of the injection channel (1).
2. 2. Fire grate according to claim 1, characterized in that the height of the spoiler (21) protruding beyond the inner wall of the injection channel (1) increases gradually in the direction of flow of the air flow.
3. 3. Fire grate according to claim 1, characterized in that the angle between the extending direction of the turbulence part (21) and the central line of the injection channel (1) in the projection plane perpendicular to the thickness direction of the fire grate is P, 20-P-80 °.
4. 4. Fire grate according to claim 1, characterized in that the projections of adjacent two of the turbulence sections (21) in the direction of flow of the air flow are partially coincident; and/or the number of the turbulence parts (21) is 4-10.
5. 5. The fire grate of claim 1, wherein the minimum cross-sectional flow area of the turbulent flow path portion (121) is S1, and the cross-sectional flow area of the inlet end of the turbulent flow path portion (121) is S2, s1:s2=0.4 to 0.8.
6. 6. Fire grate according to claim 1, characterized in that in the direction of the airflow the length of the injection channel (1) is L0, the distance between the inlet end of the turbulence channel portion (121) and the inlet end of the injection channel (1) is L1, the length of the turbulence channel portion (121) is L2, the length of the turbulence portion (21) is L3, 0.25L 1: L0 0.75 and/or 0.1L 2: L0 0.25 and/or 0.5L 3: L2 1.
7. 7. Fire grate according to claim 1, characterized in that in the direction of flow of the air flow, the downstream ends of all turbulators (21) are located at the same plane perpendicular to the centre line of the injection channel (1), and the upstream ends of all turbulators (21) are located at the same plane perpendicular to the centre line of the injection channel (1).
8. 8. A fire grate according to any one of claims 1-7, wherein the spoiler structure (2) comprises a spoiler collar portion (22) formed by inwardly stamping the injection portion, the spoiler collar portion (22) being arranged around the injection passage (1), the spoiler portion (21) being formed by inwardly stamping the spoiler collar portion (22) at an end thereof adjacent to the air inlet end of the injection passage (1).
9. 9. The fire grate of claim 8, wherein the turbulent convex ring portion (22) comprises a necking ring portion (221), a main body ring portion (222) and a flaring ring portion (223) which are connected along the airflow flowing direction, the necking ring portion (221) is gradually tapered along the airflow flowing direction, the flaring ring portion (223) is gradually widened along the airflow flowing direction, and one end, close to the air inlet end of the injection channel (1), of the turbulent portion (21) is formed by punching the main body ring portion (222) in the airflow flowing direction.
10. 10. Fire grate according to claim 9, characterized in that the orthographic projection of the spoiler (21) is located inside the orthographic projection of the body ring (222) in a projection plane perpendicular to the thickness direction of the fire grate.
11. 11. Fire grate according to claim 10, characterized in that the inner wall of the main body ring portion (222) is provided with an annular protrusion (23) protruding in a direction towards the centre line, the annular protrusion (23) being located downstream of the spoiler portion (21), and the height of the protrusion of the annular protrusion (23) relative to the inner wall of the main body ring portion (222) being smaller than or equal to the height of the protrusion of the spoiler portion (21) relative to the inner wall of the main body ring portion (222).
12. 12. A burner comprising a fire grate as claimed in any one of claims 1 to 11.
13. 13. A gas water heating apparatus comprising a burner as claimed in claim 12.

Description

Fire row, combustor and gas water heating equipment Technical Field The invention relates to the technical field of combustion, in particular to a fire grate, a burner and gas water heating equipment. Background The burner is a core component of gas water heating equipment such as a gas water heater, a gas wall-mounted furnace and the like, and the combustion stability and the sufficiency of the burner are directly related to the service performance of the gas water heating equipment. The existing burner applied to the gas water heating equipment generally comprises a plurality of fire bars which are arranged side by side, wherein an injection channel and a gas channel are arranged in the fire bars in a communicated mode, flame holes are formed in the upper ends of the fire bars in the gas channel, and gas flowing out through the gas channel and the flame holes is ignited to burn to form flame. Along with the increasing of the thinning demand of gas water heating equipment, the thickness of fire row is also more and more narrow, leads to the cross-sectional area of gas channel to reduce, and then leads to the velocity increase of gaseous mixture outflow gas channel, and the inside dwell time of gas in the fire row shortens, leads to the inhomogeneous problem of gas and air mixing to appear easily, and then leads to the unstable condition of burning to take place, influences the use experience of combustor and gas water heating equipment. Therefore, there is a need for a fire grate, a burner and a gas water heating device to solve the above technical problems. Disclosure of Invention The first technical problem to be solved by the invention is to provide a fire grate which can effectively improve the mixing uniformity of fuel gas and air. The second technical problem to be solved by the invention is to provide a burner which can effectively improve the mixing uniformity of fuel gas and air when the existing fire grate works. The third technical problem to be solved by the invention is to provide the gas water heating equipment which can effectively improve the mixing uniformity of gas and air when the existing burner works. The first technical problem is solved by the following technical scheme: the fire grate comprises an injection part with an injection channel, wherein a turbulent flow structure is convexly arranged on the inner wall of the injection channel along the direction of the central line of the injection channel, so that the injection channel forms a turbulent flow channel part at the position of the turbulent flow structure; The vortex structure comprises at least two vortex parts which are arranged along the circumferential direction of the injection channel at intervals, the vortex parts extend along the flow direction of the air flow in the injection channel, and the vortex parts are obliquely arranged so that two ends of the vortex parts are arranged along the circumferential direction of the injection channel at intervals. Compared with the background art, the flame row has the advantages that the turbulent flow structure is arranged on the inner wall of the injection channel in a protruding mode along the direction facing the central line of the injection channel, when air flows through the turbulent flow channel, the air flow near the wall surface of the turbulent flow channel can collide with the turbulent flow structure, the flowing direction is changed to be better mixed with the air flow (mainly fuel gas) in the central area, the mixing effect of air and fuel gas is improved, meanwhile, the arrangement of the turbulent flow structure can increase the flowing resistance of the air flow in the injection channel, the residence time of the air flow in the injection channel is prolonged, the mixing effect of the air and the fuel gas is further improved, and furthermore, the turbulent flow part extends obliquely along the flowing direction of the air flow, so that the air flow forms anticlockwise or clockwise rotational flow which flows upwards under the drainage effect of the inclined turbulent flow part, the mixing of the fuel gas and the air is more sufficient, the mixing sufficiency of the fuel gas and the air is effectively improved, the uniformity of flame at the flame hole is further effectively improved, the combustion sufficiency and the combustion efficiency are improved, the generated harmful substances during combustion are reduced, the combustion stability and the combustion reliability of the flame row is improved, and the design of the flame row is facilitated to be thinned. In one embodiment, the height of the turbulent flow part protruding out of the inner wall of the injection channel gradually increases along the flow direction of the air flow. In one embodiment, in a projection plane perpendicular to the thickness direction of the fire row, an included angle between the extending direction of the turbulent flow part and the central line of the injection channel is P, an