A standardized modular unit of direct-fired linear burner with high turndown ratio

Abstract

The invention relates to a standardized module unit of a direct combustion type linear combustor with a high turndown ratio. The standardized module unit comprises a fuel gas spray nozzle provided with a fuel gas spray hole, porous air inlet wing plates with combustion air spray holes, a front baffle, a rear baffle, a left baffle, a right baffle and a fixing end plate provided with an ignition pin, a fame detecting device and a flame observing mirror. The porous air inlet wing plates comprise the left air inlet wing plate and the right air inlet wing plate which are arranged on the two sides of the fuel gas spray nozzle in a V-shaped structure mode, and the left air inlet wing plate and the right air inlet wing plate are assembled with the front baffle, the rear baffle, the left baffle and the right baffle to form an upper mixing combustion area and a lower combustion air feeding area. In the working process, fuel gas is delivered out through the fuel gas spray nozzle, combustion air is delivered through spray holes in the left air inlet wing plate and the right air inlet wing plate in a blowing and pressing mode, the fuel gas and the combustion air are mixed in the combustion area, the step-by-step ignition working mode that fuel gas on the periphery of the ignition pin is ignited first, then scattering combustion is achieved, ignition is reliable and the phenomenon of detonation can be avoided is adopted, generated heat can be used directly, and the standardized module unit has the advantages of being high in turndown ratio and fuel gas burn-off rate, reliable in working and obvious in energy-saving and environment-friendly effect and has high practicability.

Description

technical field [0001] The invention relates to the technical field of gas heating equipment, in particular to a standardized modular unit of a direct-fired linear burner with a high adjustment ratio. Background technique [0002] Burners are an important part of industrial boilers. Existing gas burners generally use the diffusion combustion method of injecting gas into the air for ignition and combustion. Since the combustion is carried out without pre-mixing the gas and air, it is generally Existence: 1. The burnout rate of gas is low, and there is still a high concentration of combustible components in the flue gas after combustion; 2. The ignition stability is poor, because a large amount of air will be blown in immediately during ignition, and it is easy to extinguish the ignition The flame will affect the flame stability of the burner, and because the air flow in the combustion zone is difficult to control, the combustion adjustment ratio is generally low; 3. The heat ...

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Problems solved by technology

[0002] Burners are an important part of industrial boilers. Existing gas burners generally use the diffusion combustion method of injecting gas into the air for ignition and combustion. Since the combustion is carried out without pre-mixing the gas and air, it is generally Existence: 1. The burnout rate of gas is low, and there is still a high concentration of combustible components in the flue gas after combustion; 2. The ignition stability is poor, because a large amount of air will be blown in immediately during ignition, and it is easy to extinguish the ignition The flame will affect the flame stability of the burner, and because the air flow in the combustion zone is difficult to control, the combustion adjustment ratio is generally low; 3. The heat generated during the combustion of gas cannot be directly used in the combustion zone, but is used First, the heat exchange equipment absorbs the heat of high-temperature flue gas, and then the heat exchange equipment transfers the absorbed heat to the working medium, and then provides the user with an indirect heating method, so the heat utilization rate is low; 4. The existing gas The specifications of the burner are fixed, and the user cannot adjust or refit the burner body according to the fuel combustion load requirements, so the use is limited and the work is not widely applicable

Therefore, it is not ideal from the perspectives of environmental protection, energy saving, economy and practicality.

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