Fluidized bed combustion device for ammonia gas, power generation system and combustion method of ammonia gas

Abstract

The invention relates to the technical field of combustion devices for ammonia gas, and provides a fluidized bed combustion device for ammonia gas, a power generation system and a combustion method ofthe ammonia gas. The combustion device comprises fluidized bed combustor shell, a fluidized bed layer, an air distributing plate, a pumping chamber, a combustion-supporting gas inlet, a fuel gas inlet pipe and a flue gas exhaust port; the air distributing plate is wholly mounted at the lower part of the fluidized bed combustor shell, and the fluidized bed layer is arranged on the upper surface ofthe air distributing plate; the pumping chamber is located below the air distributing plate; the combustion-supporting gas inlet is formed in the pumping chamber; the fuel gas inlet pipe is fixed onthe air distributing plate and communicates with an inner cavity of the air distributing plate; and the flue gas exhaust port is formed in the upper part of the fluidized bed combustor shell. According to the designed fluidized bed combustion device, the problems of has high firing energy, high flame propagation velocity, narrow firing concentration range and unstability of ammonia gas combustionare solved thoroughly. Therefore, the power generation system can successfully use the ammonia gas as fuel, and the remarkable carbon dioxide emission reducing effect is realized.

Description

technical field [0001] The invention relates to the technical field of ammonia combustion devices, in particular to an ammonia fluidized bed combustion device, a power generation system based on the device and a combustion method based on the power generation system. Background technique [0002] The information disclosed in the Background of the Invention is only intended to increase the understanding of the general background of the invention, and is not necessarily to be taken as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art. [0003] Since the industrial revolution, the combustion of a large amount of fossil fuels such as coal, oil, and natural gas has led to an increase in the concentration of carbon dioxide in the atmosphere, resulting in global climate change, bringing about many problems such as melting cold glaciers, rising sea levels, and frequent forest fires in tropical ...

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Problems solved by technology

[0005] The main purpose of the present invention is to solve the problems that ammonia gas is difficult to ignite, has low combustion rate, unstable combustion flame, and is difficult to be used for large-scale power generation, because compared with methane and other gases, the minimum ignition energy of ammonia gas is higher, resulting in It is not easy to be ignited, and the reactivity of ammonia and oxygen is relatively weak, resulting in a relatively slow burning rate

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