Regeneration type radiant tube gas combustor for medium-low-heat-value fuel gas

Abstract

The invention provides a regeneration type radiant tube gas combustor for medium-low-heat-value fuel gas. According to the regeneration type radiant tube gas combustor, fuel gas inlets and air inletscommunicate with fuel gas channels, the fuel gas channels extend into a radiant tube, central ignition rods are arranged in the fuel gas channels, one ends of the central ignition rods are connected to sparking plugs arranged on combustion devices, the other ends of the central ignition rods are connected to ignition electrodes arranged in the fuel gas channels, disc-shaped nozzles and combustioncylinders are arranged in the radiant tube, the disc-shaped nozzles are arranged at outlets of the fuel gas channels, flue gas cavities are formed between the fuel gas inlets and the end part of the radiant tube, tubular heat exchangers are further arranged between the fuel gas inlets and the end part of the radiant tube, dividing wall type regenerators are arranged on the outer sides, extending into the radiant tube, of the fuel gas channels, and regenerator bodies fill between the dividing wall type regenerators and the inner side of the radiant tube. The regeneration type radiant tube gas combustor has the advantages that the fuel gas channels adopt tubular heat exchanger+dividing wall type regenerator structures, so that the effective heat exchange area can be increased, double preheating of air and the fuel gas can be achieved, the thermal equivalent is balanced, especially for medium-low-heat-value fuel gas, and the preheating effect can be better.

Description

technical field [0001] The invention relates to the technical field of burners, in particular to a medium-low calorific value gas regenerative radiant tube gas burner. Background technique [0002] Regenerative radiant tubes apply high-temperature air combustion technology to gas radiant tubes, mainly using combustible gases such as coal gas as fuel, and the combustion air or gas is preheated to a high temperature above 900°C, and then enters the radiant tube for mixed combustion. Since the air or gas is preheated, for 800~3000kcal / N·m 3 The low calorific value gas can also burn stably, so the regenerative radiant tube burner has a wide range of fuel adaptability. It has the advantages of high combustion efficiency, stable operation, reliable and simple equipment, etc., and is widely used in various heat treatment furnaces and continuous heating furnaces in petrochemical, metallurgical and other industries. [0003] However, the existing regenerative radiant tube burners m...

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Problems solved by technology

[0003] However, the existing regenerative radiant tube burners mainly preheat the air, which causes the temperature difference between the air and the gas, which affects the preheating effect. In addition, the existing regenerative radiant tube burners still have radiant tubes The lack of protection in the high-temperature area, the local high temperature of the radiant tube affects the service life of the radiant tube, and the existing regenerative radiant tube burner directly discharges the flue gas after combustion, and the residence time in the radiant tube is relatively short. High nitrogen oxide content, more serious environmental pollution

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