Automatic ignition linear type combustor

Abstract

The invention relates to an automatic ignition linear type combustor which comprises an ignition electrode (2), a nozzle plate (13), an opened air collecting box (5), a pneumatic panel (6), an air mixing pipeline (7) and a mixer (8). The nozzle plate (13) is provided with a plurality of nozzle holes (23), a combustion chamber (15) which is of a long narrow shape is arranged above the nozzle plate (13), a gradually-narrowed cavity (16) with a small end up is formed below the nozzle plate (13), and the pneumatic panel (6) is arranged inside the opened air collecting box (5). The bottom of the opened air collecting box (5) is communicated with the gas mixing pipeline (7), and the gas mixing pipeline (7) is connected with the mixer (8). The automatic ignition linear type combustor can guarantee air and gas to be mixed evenly in a short pipeline, relative large power combustion is achieved, the stiffness and the stability of flames are ensured, and evenness and conformity of the flames in the length direction of the combustor can be ensured.

Description

technical field [0001] The invention relates to an automatic ignition wire burner in the fields of gas combustion, low-temperature baking and drying. Background technique [0002] The linear burner is a new type of burner using premixed combustion technology. Since its inception, it has been widely used in the industrial field. It is generally used in occasions where the target heating temperature of the heated part is low, such as ambient heating, air circulation heating, workpiece heating, industrial packaging, welding and other fields. Typical applications are as follows: Entrance looper, exit looper of large horizontal continuous annealing furnace and strip heating device before coiler. The power of a single burner is generally between 10 and 200kW, and the length of the burner can be adjusted according to different heating function requirements. The burner power per unit length is generally 0.3 to 1kW / cm. [0003] The linear burner adopts premixed combustion technolog...

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Problems solved by technology

Generally, air and gas pipelines are directly mixed for premixing. After mixing, a long section of mixed gas pipeline is required to ensure mixing uniformity; general linear burners are ignited by manual ignition without flame detection, or by using Electronic ignition technology has been adopted, but continuous flame monitoring cannot be realized, that is, remote pulse combustion control cannot be realized; when ordinary linear burners burn high calorific value gas, the mixed gas injection flow rate is low, the burner power is relatively small, and the flame rigidity and flame The stability is poor; the general linear burner can only ensure the uniformity of the flame shape in a relatively short length (the burner length is less than 700mm). After the length of the burner is extended, it is easy to produce defects such as inconsistent flame height and local instability

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