CN209893375U - Gas boiler - Google Patents

Abstract

The utility model provides a gas boiler, including square furnace, set up four combustors in four angular positions of furnace, four angular positions of top furnace of combustor are provided with the overgrate air device, and the export direction of overgrate air device is skew 3.5 jiaos for square furnace's center right, and the overgrate air device forms the whirlwind in furnace center department from the wind that four angles blown out, is provided with air regulation device on the overgrate air device, air regulation device is the shutter structure, and accommodation is-15 ~ 15, and the overgrate air device is at a distance of 2.5 meters on the combustor. The gas boiler can reduce the combustion temperature of the hearth and adjust the distribution of the temperature field in the boiler, so that the temperature distribution of the flue gas is more uniform, and the generation of NOx is effectively controlled.

Description

Gas boiler

Technical Field

The utility model relates to a boiler, more specifically say and relate to a gas boiler.

Background

The industrial development speed of China is high, and the number of boilers is increased along with the industrial development speed. NOx emission of the boiler is 400-500 mg/m3, so that a large amount of haze particles are caused, and the health of people is seriously influenced; incomplete combustion and fuel waste.

Disclosure of Invention

In order to solve the problems existing in the technology, the utility model provides a gas boiler which can effectively control the generation of NOx.

The utility model discloses a realize through following technical scheme: a gas boiler comprises a square hearth, four burners are arranged at four angular positions of the hearth, secondary air devices are arranged at the four angular positions of the hearth above the burners, the outlet directions of the secondary air devices deviate from the center of the square hearth by 3.5 degrees rightwards, and air blown out from the four corners by the secondary air devices forms rotating air at the center of the hearth.

In the scheme, the distance between the secondary air devices and the combustor is 2.5 meters.

In the scheme, the secondary air device is provided with an air volume adjusting device which is of a shutter structure, and the adjusting range is-15 degrees.

Compared with the prior art, the utility model, its beneficial effect is:

1. the supplementary fuel burns the air required by incomplete combustion, and ensures complete combustion of the fuel.

2. The combustion temperature of the hearth is reduced, the distribution of the temperature field in the furnace is adjusted, the temperature distribution of the flue gas is more uniform, and the generation of NOx is effectively controlled.

Drawings

FIG. 1 is a schematic structural view of the gas boiler of the present invention.

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

Fig. 3 is an enlarged view at B in fig. 2.

In the figure: 1. the device comprises a hearth, 2 burners, 3 secondary air devices and 4 air quantity adjusting devices.

Detailed Description

The gas boiler of the present invention will be further described with reference to the following embodiments and accompanying drawings:

fig. 1 is a schematic structural view of a gas boiler according to the present invention, fig. 2 is a sectional view taken along line a-a of fig. 1, and fig. 3 is an enlarged view taken along line B of fig. 2. In the figure, the gas boiler comprises a square hearth 1, four burners 2 are arranged at four angular positions of the hearth 1, secondary air devices 3 are arranged at four angular positions of the hearth 2.5 meters above the burners 2, the outlet directions of the secondary air devices 3 are deviated from the center of the square hearth by 3.5 degrees to the right, and the secondary air devices form rotating air at the center of the hearth by air blown out from the four corners. The secondary air device is provided with an air quantity adjusting device 4, the air quantity adjusting device 4 is of a shutter structure, and the adjusting range is-15 degrees.

The gas boiler can reduce the combustion temperature of the hearth and adjust the distribution of the temperature field in the boiler, so that the temperature distribution of the flue gas is more uniform, and the generation of NOx is effectively controlled.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed with reference to the preferred embodiment, it is not limited to the present invention, and any skilled person in the art can make various changes or modifications equivalent to the above embodiments without departing from the scope of the present invention, but all the modifications, changes and modifications of the above embodiments by the technical spirit of the present invention are within the scope of the present invention.

Claims (3)

1. A gas boiler comprises a square hearth, four burners are arranged at four angular positions of the hearth, and the gas boiler is characterized in that: secondary air devices are arranged at four corners of a hearth above the combustor, the outlet direction of each secondary air device deviates 3.5 degrees rightwards relative to the center of the square hearth, and the secondary air devices blow out air from the four corners to form rotating air at the center of the hearth.

2. A gas boiler as claimed in claim 1, characterized in that: the overfire air means is 2.5 metres above the burner.

3. A gas boiler as claimed in claim 2, characterized in that: the secondary air device is provided with an air quantity adjusting device which is of a shutter structure, and the adjusting range is-15 degrees.

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