Nozzle-adjustable low-NOx burner suitable for medium-low calorific value fuel gas

Abstract

The invention provides a nozzle-adjustable low-NOx burner suitable for medium-low calorific value fuel gas, and aims to solve the problems that a conventional fuel gas burner adopted for recycling the medium-low calorific value fuel gas is difficult to ignite, unstable in burning and low in burning efficiency, and nitric oxide generated in the burning process is difficult to effectively restrain. The nozzle-adjustable low-NOx burner comprises a fuel gas inlet flow channel, an air flow channel, an air rotational flow device and a fuel gas shunt ring, wherein the fuel gas inlet flow channel penetrates through the upstream side wall of the air flow channel; the fuel gas shunt ring is sleeved with the upstream portion of the air flow channel and is communicated with the fuel gas inlet flow channel; the end face of the fuel gas shunt ring is connected with a plurality of first fuel gas branch pipes, a plurality of second fuel gas branch pipes and a plurality of third fuel gas branch pipes; the air rotational flow device comprises a rotational flow inner ring, a rotational flow outer ring and a plurality of rotational flow blades arranged between the rotational flow inner ring and the rotational flow outer ring in the circumferential direction; and the three fuel gas branch pipes are arranged in a staggered mode from the center to the outer side, and supplies fuel gas in a graded mode in the radial direction and the circumferential direction.

Description

technical field [0001] The invention belongs to the technical field of thermal energy and power engineering, and relates to a medium and low calorific value gas burner, in particular to a nozzle-adjustable low-NO gas burner suitable for medium and low calorific value gas x burner. Background technique [0002] The common medium and low calorific value gases in industry mainly include blast furnace gas, coke oven gas, converter gas, and low calorific value coalbed methane. Recycling these medium and low calorific value gas as a supplement to the energy system has a positive effect on alleviating the shortage of energy reserves and improving the atmospheric environment. However, due to the complex composition of these low calorific value gas gases, the combustible gas content is low, and they contain more inert gases, such as CO 2 , N 2 Therefore, the calorific value is low, and problems such as difficulty in ignition, unstable combustion, and low combustion efficiency usua...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of conventional gas burners used in the prior art when recovering and utilizing medium and low calorific value gas, which usually have difficulty in ignition, unstable combustion and low combustion efficiency, and the nitrogen oxides generated during the combustion process are difficult to be effectively suppressed To solve the problem, provide an adjustable nozzle low NO gas suitable for medium and low calorific value gas x burner

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