Automatic ignition device for quenching furnace exhaust chimney

Abstract

The utility model belongs to heat treatment equipment technical field more specifically relates to a quenching furnace exhaust chimney automatic ignition device, including the combustion chamber on the exhaust chimney, the air inlet pipe that connects in the combustion chamber and the igniter that connects in the combustion chamber, the air inlet pipe burns on the outside of exhaust chimney, and the inside and outside surface that corresponds winding air inlet pipe in exhaust chimney all is provided with the heat conducting layer, the air inlet of air inlet pipe is connected with the fan, the winding part of air inlet pipe is located above the combustion chamber, and the heat exchange is carried out between air inlet pipe and exhaust chimney, improves the air temperature to improve the combustion efficiency in the combustion chamber, avoids the oil vapour condensation hanging wall.

Description

Technical Field

[0001] This utility model belongs to the technical field of heat treatment equipment, and more specifically relates to an automatic ignition device for the exhaust chimney of a quenching furnace. Background Technology

[0002] Quenching can improve the hardness and wear resistance of workpieces, and is therefore widely used in various tools, molds, measuring tools and parts that require wear resistance (such as gears, rolls, carburized parts, etc.) to meet different usage requirements.

[0003] During operation, quenching furnaces generate waste gas containing flammable and explosive gases such as oil vapor and carbon monoxide. To prevent air pollution, ignition devices are installed in the exhaust chimney or pipes to ignite these flammable gases and reduce their concentration in the waste gas. However, ignition requires air, and the introduction of outside air rapidly lowers the temperature of the flue gas, causing oil vapor and other organic gases to condense quickly on the inner wall of the chimney. This reduces the efficiency of ignition in removing waste gas. Over time, a significant amount of grease accumulates on the inner wall of the chimney, reducing the chimney's channel area and hindering the exhaust of flue gas. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an automatic ignition device for the exhaust chimney of a quenching furnace, which increases the intake air temperature to improve combustion efficiency in the combustion chamber and prevents oil vapor from condensing and adhering to the walls.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic ignition device for the exhaust chimney of a quenching furnace, comprising a combustion chamber located on the exhaust chimney, an air inlet pipe connected to the combustion chamber, and an igniter connected to the combustion chamber. The air inlet pipe burns on the outer surface of the exhaust chimney, and a heat-conducting layer is provided on both the inner and outer sides of the exhaust chimney corresponding to the air inlet pipe. A fan is connected to the air inlet of the air inlet pipe, and the winding part of the air inlet pipe is located above the combustion chamber.

[0006] Furthermore, the diameter of the combustion chamber is larger than the diameter of the exhaust chimney.

[0007] Furthermore, a first valve is provided on the air intake pipe.

[0008] Furthermore, the igniter is provided with a gas pipe, the opening of which extends to the ignition end of the igniter, and the ignition end of the igniter extends into the combustion chamber.

[0009] Furthermore, a second valve is installed on the gas pipe.

[0010] Furthermore, the outer surface of the air intake pipe is wrapped with an insulation layer.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: the fan sends outside air into the air inlet pipe, and the air exchanges heat with the exhaust chimney when it passes through the part of the air inlet pipe that wraps around it, and finally enters the combustion chamber. Then the igniter in the combustion chamber ignites the combustible gas in the combustion chamber, and the heat of combustion is discharged upward through the part of the air inlet pipe that wraps around it, and then exchanges heat with the air inlet pipe again, which increases the air temperature, improves the combustion efficiency in the combustion chamber, and avoids oil vapor condensation and adhesion to the wall. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the automatic ignition device for the exhaust chimney of the quenching furnace according to this utility model.

[0013] Reference numerals: Combustion chamber 1; Intake pipe 2; Ignition device 3; Fan 4; First valve 5; Second valve 6. Detailed Implementation

[0014] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0015] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" or "a number" means two or more, unless otherwise explicitly specified.

[0016] Reference Figure 1 The present invention will be further described below.

[0017] An automatic ignition device for a quenching furnace exhaust chimney includes a combustion chamber 1 located on the exhaust chimney, an air inlet pipe 2 connected to the combustion chamber 1, and an igniter 3 connected to the combustion chamber 1. The air inlet pipe 2 is wound around the outer surface of the exhaust chimney, and a heat-conducting layer is provided on both the inner and outer sides of the exhaust chimney corresponding to the wound air inlet pipe 2. A fan 4 is connected to the air inlet of the air inlet pipe 2, and the wound part of the air inlet pipe 2 is located above the combustion chamber 1.

[0018] like Figure 1 As described above, the fan 4 sends outside air into the intake pipe 2. When the air passes through the part of the intake pipe 2 that wraps around the exhaust chimney, it exchanges heat with the exhaust chimney and is finally discharged into the combustion chamber 1. Then, the igniter 3 in the combustion chamber 1 ignites the combustible gas in the combustion chamber 1, and the heat of combustion is discharged upward through the part that wraps around the intake pipe 2, and then exchanges heat with the intake pipe 2 again, which increases the air temperature, improves the combustion efficiency in the combustion chamber 1, and avoids oil vapor condensation and sticking to the wall.

[0019] Specifically, in the initial stage of use of the quenching furnace, the exhaust chimney is already filled with air, so the initial ignition at this time does not require the air to be introduced through the air inlet pipe 2.

[0020] Specifically, the igniter 3 is an automatic igniter, program-controlled, and can also be manually started for ignition.

[0021] like Figure 1 As shown, in this example, preferably, the diameter of the combustion chamber 1 is larger than the diameter of the exhaust chimney, so that the air can be fully mixed with the exhaust gas, while ensuring that the air pressure in the combustion chamber 1 does not increase due to the filling of air.

[0022] like Figure 1 As shown in this example, preferably, the air intake pipe 2 is provided with a first valve 5, which can control the air intake volume and the air intake switch.

[0023] like Figure 1 As shown, in this preferred embodiment, the igniter 3 is provided with a gas pipe, the opening of which extends to the ignition end of the igniter 3, and the ignition end of the igniter 3 extends into the combustion chamber 1.

[0024] Specifically, by introducing a small amount of high-purity combustible gas into the combustion chamber 1 through the gas pipe, the gas in the combustion chamber 1 can be more easily ignited.

[0025] Specifically, gas pipelines can transport liquefied petroleum gas (coal gas), natural gas, etc.

[0026] like Figure 1 As shown in this example, preferably, the gas pipe is equipped with a second valve 6, which can control the opening and closing of the gas pipe.

[0027] In this example, preferably, the outer surface of the air intake pipe 2 is wrapped with an insulation layer to reduce heat loss.

[0028] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An automatic ignition device for the exhaust chimney of a quenching furnace, characterized in that: It includes a combustion chamber located on an exhaust chimney, an intake pipe connected to the combustion chamber, and an igniter connected to the combustion chamber. The intake pipe burns on the outer side of the exhaust chimney, and a heat-conducting layer is provided on both the inner and outer sides of the intake pipe inside the exhaust chimney. The intake port of the intake pipe is connected to a fan, and the winding part of the intake pipe is located above the combustion chamber.

2. The automatic ignition device for the exhaust chimney of the quenching furnace according to claim 1, characterized in that: The diameter of the combustion chamber is larger than the diameter of the exhaust chimney.

3. The automatic ignition device for the exhaust chimney of the quenching furnace according to claim 1, characterized in that: The intake pipe is equipped with a first valve.

4. The automatic ignition device for the exhaust chimney of the quenching furnace according to claim 1, characterized in that: The igniter is equipped with a gas pipe, the opening of which extends to the ignition end of the igniter, and the ignition end of the igniter extends into the combustion chamber.

5. The automatic ignition device for the exhaust chimney of the quenching furnace according to claim 4, characterized in that: A second valve is installed on the gas pipe.

6. The automatic ignition device for the exhaust chimney of the quenching furnace according to claim 1, characterized in that: The outer surface of the air intake pipe is covered with an insulation layer.

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