Coal and ammonia dual-purpose burner device

Abstract

The invention discloses a coal and ammonia dual-purpose burner device which comprises an inner ammonia gas pipe, a primary air pipeline, a primary air sleeve, an outer ammonia gas sleeve, a secondary air sleeve and a tertiary air sleeve which are sequentially arranged from inside to outside in a sleeving mode. Outlets of the inner ammonia gas pipe, the primary air pipeline, the primary air sleeve, the outer ammonia gas sleeve, the secondary air sleeve and the tertiary air sleeve face the combustor, the outlets of the primary air sleeve, the outer ammonia gas sleeve, the secondary air sleeve and the tertiary air sleeve are flared openings, the end of the outlet of the outer ammonia gas sleeve is connected with a first blocking plate, and the end of the outlet of the tertiary air sleeve is connected with a second blocking plate. A first blocking plate is arranged at the outlet of the inner ammonia gas pipe, a first fire hole is formed in the first blocking plate, the outlet of the inner ammonia gas pipe is a reducing pipe, the end part of the outlet of the reducing pipe is connected with a second blocking plate, and second fire holes are formed in the reducing pipe and the second blocking plate. According to the invention, the adaptability of the combustor to fuel is improved, the combustion stability is improved, and the generation of NOx in the combustion process is reduced.

Description

technical field [0001] The invention relates to the technical field of burners, in particular to a dual-purpose burner device for coal and ammonia. Background technique [0002] According to statistics, China's coal, oil, and natural gas consumption account for about 51%, 14%, and 7.8% of the world's total respectively. About half of China's coal is used for combustion and power generation, which is the largest single source of carbon dioxide. Reducing coal consumption in the power industry is an effective means to reduce carbon dioxide emissions, but China's resource status of rich coal, poor oil and little gas makes it difficult for the power industry to completely separate from coal. In recent years, in the face of severe carbon emission problems, research on carbon-free fuels has attracted more and more attention. Ammonia is regarded as a promising clean energy carrier and storage medium. Compared with hydrogen, ammonia has a lower cost per unit of stored energy, a high...

AI Technical Summary

Problems solved by technology

However, these dual-purpose burner devices have clear requirements for fuel, and are especially suitable for the co-firing of high-calorific-value methane, but not for the co-firing of low-calorific-value ammonia

At present, the effective utilization of ammonia fuel is very challenging. Compared with conventional hydrocarbon fuels, pure ammonia has lower laminar combustion velocity and calorific value, and the energy required for ignition is higher, and the flammable limit range is narrower. , making it more difficult to burn pure ammonia

In addition, due to the composition characteristics of ammonia fuel, NO X The high amount of generation, which further inhibits its application as a new carbon-free fuel in boilers

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