A new low-nitrogen water-cooled premix gas burner

Abstract

The utility model relates to gas device technical field, concretely is a kind of new low nitrogen water-cooled premix gas burner, it can ensure that flame is stable, reduce flame temperature, reduce NOx generation, it includes air mixing box, the air mixing box's export is provided with even wind board and front water-cooled pipe row, front water-cooled pipe row one side is provided with igniter, first strip gap is equipped between the adjacent water-cooled pipe of front water-cooled pipe row, it is characterized in that, first strip gap is inlayed with corrugated board layer, the corrugated board layer is extruded by multiple corrugated boards and leave gas flow gap, rear water-cooled pipe row is provided with after front water-cooled pipe row.

Description

Technical Field

[0001] This utility model relates to the field of gas device technology, specifically a novel low-NOx water-cooled premixed gas burner. Background Technology

[0002] Currently common water-cooled premixed burners employ a uniform air distribution plate and water-cooled pipe arrays within the mixing chamber. The air distribution plate features outlet holes (either round or oblong), and strip-shaped gaps are positioned between the water-cooled pipe arrays, with the outlet holes corresponding to these gaps. This allows the air-fuel mixture to pass through quickly and evenly. However, this structure has drawbacks: the strip-shaped gaps are prone to misalignment and deformation; the combustion surface formed after the gas mixture exits the gaps results in an unstable, drifting flame; and the high flame temperature leads to significant NOx generation. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a novel low-NOx water-cooled premixed gas burner, which ensures flame stability, reduces flame temperature, and decreases NOx generation.

[0004] The technical solution is as follows: a novel low-NOx water-cooled premixed gas burner, comprising a mixing box, an air distribution plate and a front water-cooled pipe bank at the outlet of the mixing box, an ignition device on one side of the front water-cooled pipe bank, and a first strip-shaped gap between adjacent water-cooled pipes of the front water-cooled pipe bank. The first strip-shaped gap is characterized by having a corrugated plate layer embedded in it, the corrugated plate layer being formed by pressing multiple corrugated plates and leaving gas flow gaps, and a rear water-cooled pipe bank being provided behind the front water-cooled pipe bank.

[0005] A further feature is that the second strip-shaped gap between adjacent water-cooling pipes in the rear water-cooling pipe bank corresponds to the position of the first strip-shaped gap; The width of the second strip-shaped gap is not less than the width of the first strip-shaped gap; A corrugated plate limiting block is installed inside the first strip-shaped gap; The water-cooling pipes in the front water-cooling pipe bank are thick-walled pipes, and both sides of the thick-walled pipes are flat.

[0006] By adopting this utility model, a corrugated plate layer is embedded in the first strip-shaped gap to ensure that the water-cooled pipe will not deform and to serve as a flame arrester. The mixture of air and fuel gas can pass smoothly and stably through the gas flow gap, ensuring stable flame combustion. The flame temperature is further reduced by the subsequent water-cooled pipe, thereby achieving the goal of reducing NOx. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2This is a schematic diagram of the front water-cooled pipe bank structure; Figure 3 This is a schematic diagram of the side of the corrugated plate layer. Detailed Implementation

[0008] See Figure 1 , Figure 2 As shown, a novel low-NOx water-cooled premixed gas burner includes a mixing box 1. A uniform air distribution plate 2 and a front water-cooled pipe array 3 are installed at the outlet of the mixing box 1. An ignition device 7 is installed on one side of the front water-cooled pipe array 3. A first strip-shaped gap is provided between adjacent water-cooled pipes of the front water-cooled pipe array 3. A corrugated plate layer 4 is embedded in the first strip-shaped gap. The corrugated plate layer 4 is formed by pressing multiple corrugated plates and leaving gas flow gaps, formed by the concave and convex surfaces of adjacent corrugated plates, such as... Figure 3 As shown, it serves as a flame arrester. The gas mixture passes through the gas flow gap at high speed, ensuring that the gas flow rate of the mixture is not lower than its combustion speed under low load. The corrugated plate is made of stainless steel. Along the length of the water-cooling pipe, multiple corrugated plate limiting blocks 6 are installed in the first strip-shaped gap to ensure the installation accuracy of the corrugated plate and fix its position so as not to deviate. For easy installation, the water-cooling pipes of the front water-cooling pipe row 2 are thick-walled pipes, and the two sides of the thick-walled pipes are machined into flat surfaces, allowing the corrugated plate to be easily inserted and embedded in place after abutting against the corrugated plate limiting blocks 6. The corrugated plate limiting blocks 6 are directly welded to the flat surfaces on both sides.

[0009] To reduce the flame temperature, a rear water-cooled pipe bank 5 is installed behind the front water-cooled pipe bank 3. The second strip-shaped gap between adjacent water-cooled pipes in the rear water-cooled pipe bank 5 corresponds to the position of the first strip-shaped gap. It does not block the flame but only serves to cool it down. The width of the second strip-shaped gap is not less than the width of the first strip-shaped gap.

Claims

1. A novel low-NOx water-cooled premixed gas burner, comprising a mixing box, wherein a uniform air distribution plate and a front water-cooled pipe bank are provided at the outlet of the mixing box, an ignition device is provided on one side of the front water-cooled pipe bank, and a first strip-shaped gap is provided between adjacent water-cooled pipes of the front water-cooled pipe bank, characterized in that, The first strip-shaped gap is embedded with a corrugated plate layer, which is formed by pressing multiple corrugated plates and leaving gas flow gaps. A rear water-cooling pipe bank is provided behind the front water-cooling pipe bank.

2. The novel low-NOx water-cooled premixed gas burner according to claim 1, characterized in that, The second strip gap between adjacent water-cooling pipes in the rear water-cooling pipe bank corresponds to the position of the first strip gap.

3. A novel low-NOx water-cooled premixed gas burner according to claim 2, characterized in that, The width of the second strip gap is not less than the width of the first strip gap.

4. A novel low-NOx water-cooled premixed gas burner according to claim 1, characterized in that, A corrugated plate limiting block is installed inside the first strip-shaped gap.

5. A novel low-NOx water-cooled premixed gas burner according to claim 1, characterized in that, The water-cooling pipes in the front water-cooling pipe bank are thick-walled pipes, and both sides of the thick-walled pipes are flat.

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