Combustion nozzle for whole hydrogen bell-type annealing furnace, and waste hydrogen introduction and combustion method adopting the same

Abstract

The present invention relates to a combustion nozzle for a whole hydrogen bell-type annealing furnace, and a waste hydrogen introduction and combustion method adopting the combustion nozzle. The combustion nozzle comprises a combustion chamber, an air distribution disk, a coal gas nozzle, an air duct, a coal gas flowing pipe and a dual-electrode. According to the present invention, the coal gas combustion and the waste hydrogen combustion are integrated in the same combustion nozzle; when the waste hydrogen is introduced, the coal is adopted as the ever-burning flame to ignite the waste hydrogen so as to ensure the safety and the stability of the waste hydrogen combustion; the air is divided into three levels in the air distribution disk to carry out mixing combustion, the coal gas is sprayed by adopting the uniform jet flow distribution on the end surface so as to accelerate the mixing speed of the coal gas, the waste hydrogen and the air, and ensure the stability of the combustion nozzle combusting and the reliability of the flame monitoring; with adopting the high-speed combustion nozzle to carry out the high-speed combustion for the waste hydrogen, the resources are recovered and utilized, the temperature uniformity of the furnace is ensured with the high-speed convective circulation of the flue gas.

Description

technical field [0001] The invention relates to the technical field of burners, in particular to a high-speed burner used in an all-hydrogen bell annealing furnace to introduce waste hydrogen into a heating mantle for combustion and a waste hydrogen combustion method using the burner. Background technique [0002] Full hydrogen bell annealing furnace is a type of furnace that carries out bright and non-oxidative annealing of steel coils in the state of 100% hydrogen. Pure hydrogen in the furnace is used as a protective gas for strong convection circulation. This furnace type has high production efficiency and excellent product mechanical properties. Uniformity, high surface finish and many other advantages have been widely promoted and applied in many iron and steel enterprises at home and abroad, and become a furnace type that keeps pace with continuous annealing furnaces. Hot blowing is an indispensable link in the annealing process of the full hydrogen bell furnace. The s...

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Problems solved by technology

[0003] For this waste hydrogen containing rolling fluid, there are usually two treatment methods: one is to directly discharge it to the atmosphere or workshop, this method not only does not meet the requirements of the national environmental protection regulations, but also is harmful to fuel resources. Great waste; another method is to add a hydrogen burner to the heating cover of the bell-type furnace, and ignite the waste hydrogen through the permanent ignition burner, so that the waste hydrogen generated by the hot blowing can enter the heating cover again for combustion. Although this method It can realize the recycling of waste hydrogen, but it needs to set up a complete hydrogen combustion pipeline, add hydrogen burners and ignition burners at the same time, and the configuration of the combustion system is relatively complicated

At the same time, due to the discontinuous nature of waste hydrogen generation, the addition of hydrogen burners to the configuration of the combustion system will affect the uniformity of capacity distribution between the layers of the heating hood of the full hydrogen bell annealing furnace, thereby affecting the uniformity of the furnace temperature in the heating hood. influences

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