High-efficiency low-emission combustion chamber head capable of premixing hydrogen

Abstract

According to the hydrogen premixing efficient low-emission combustion chamber head, the characteristic that hydrogen premixing flames are high in propagation speed and the advantage that the hydrogen flames are thin are combined, the low-emission combustion chamber stable-combustion head structure is designed, the structural design that the multiple stages of fuel annular cavities are connected with the annular cavities is adopted, and the combustion efficiency is improved; the multi-stage premixing flow channel is arranged in the combustor head, the uniformity of fuel entering the combustor head can be greatly improved, the multi-stage premixing flow channel is gradually shrunk, the spiral grooves are formed in the premixing flow channel, mixing of the fuel and air is enhanced, the combustion temperature field is improved, reliable and stable combustion of hydrogen under the premixing condition is achieved, and therefore emission of nitric oxide in the hydrogen combustion process is reduced, and the combustion efficiency is improved. And clean and efficient hydrogen combustion is realized. The scheme has the advantages of light and handy structure, high space utilization rate, high volume heat intensity, low pollutant emission, uniform outlet temperature, good universality, simplicity in processing and maintenance and the like.

Description

technical field [0001] The invention relates to the application field of gas turbine combustors, in particular to a hydrogen premixed high-efficiency and low-emission combustor head. [0002] technical background [0003] The consumption of fossil fuels is increasing day by day, and its reserves are decreasing day by day. In addition, the increase of carbon dioxide emissions causes the earth's temperature to rise year by year. The combustion product of hydrogen energy is clean and environmentally friendly water with abundant reserves and easy preparation. The development of hydrogen energy has achieved international consensus and has become the mainstream trend of new energy utilization. Hydrogen is a carbon-free and clean fuel, and the large-scale application of hydrogen in combustion will be an important trend in the development of the energy field in the future. The combustion speed of hydrogen is relatively fast, and it is limited by the backfire problem during the combu...

AI Technical Summary

Problems solved by technology

However, due to the high adiabatic combustion temperature of hydrogen, non-premixed combustion will cause the temperature of the combustion area to be too high, resulting in more nitrogen oxides and poor uniformity of the outlet temperature field.

Premixed combustion technology is beneficial to reduce local high-temperature areas and reduce nitrogen oxide emissions, but there are problems such as insufficient mixing of hydrogen during premixing, easy tempering and blowing out, etc.

In addition, due to the high combustion speed of hydrogen, the flame combustion position is close to the nozzle, and there is a risk of ablation in the combustion method

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