Shallow hydrogen gas appliance

Abstract

The invention discloses a light hydrogen gas appliance, which comprises a natural gas hydrogenation variable ratio mixing system for controlling mixing by adopting online data, controlling the mixing ratio of natural gas and hydrogen according to the change of working conditions of the system, and providing light hydrogen and natural gas mixed gas with a corresponding hydrogen doping ratio; the pipeline and process treatment monitoring system is used for monitoring and tracking the states of the pipeline and a welding part by carrying out process treatment optimization and gas sampling monitoring on the shallow hydrogen and natural gas mixed gas pipeline and the welding part of the pipeline; the natural gas hydrogenation mixing parameter system is used for controlling the mixing ratio, the air-fuel ratio and the preheating air temperature parameter according to the characteristics of the natural gas hydrogen-doped gas fuel so as to control the combustion characteristics of the light hydrogen and natural gas mixed gas; according to the micro-mixing combustion jet flow light hydrogenation system, the uniformity of light hydrogen gas at an outlet is enhanced by adjusting and reducing the flow mixing volume scale of light hydrogen and natural gas mixed gas and air, and low-emission and high-efficiency combustion of the light hydrogen gas is carried out.

Description

technical field [0001] The invention relates to the technical field of new energy energy saving precision control, and more particularly, the invention relates to a shallow hydrogen gas appliance. Background technique [0002] At this stage, due to the complex structural characteristics of the fuel supply system of natural gas and hydrogen, many metal materials have hydrogen embrittlement problems, which lead to reduced material toughness and increased fatigue crack growth rate, which can lead to material failure during service; hydrogen embrittlement affects different grades of steel. The effects are different, but they will lead to deterioration of material properties; small-sized parts such as bolts, springs, rivets, etc. are more prone to hydrogen embrittlement due to their large deformation and small grain size during processing; at the same time, hydrogen embrittlement is prone to occur in pipelines. Before injecting hydrogen into the natural gas pipeline, the treatmen...

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Problems solved by technology

[0002] At this stage, due to the complex structural characteristics of natural gas and hydrogen fuel supply systems, many metal materials have hydrogen embrittlement problems, which lead to a decrease in material toughness and an increase in the rate of fatigue crack growth, which can lead to material failure during service; The effects are different, but they all lead to deterioration of material properties; small-sized parts such as bolts, springs, rivets, etc. are more prone to hydrogen embrittlement due to their large deformation and small grain size during processing; at the same time, hydrogen embrittlement is prone to occur in pipelines. Before injecting hydrogen into the natural gas pipeline, the treatment process of the pipeline should be optimized; after the natural gas is mixed with hydrogen, the composition of HCNG gas will change, and the calorific value, density and combustion characteristics of natural gas will change accordingly, resulting in combustion The thermal load, primary air coefficient, combustion stability, and CO content in the flue gas change; the conventional natural gas premixed combustor mainly promotes the fuel-air mixing through the swirl structure, and induces high-temperature flue gas at the outlet of the nozzle. Backflow achieves flame stabilization, and how to achieve dry low-emission combustion of hydrogen-mixed fuels with a high flame propagation velocity still needs to be further solved; therefore, it is necessary to propose a shallow hydrogen gas appliance to at least partially solve the problems existing in the prior art

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