Coal and ammonia co-combustion burner for corner tangential coal-fired boiler

Abstract

The invention belongs to the field of combustion equipment and technology, and discloses a coal and ammonia co-combustion burner for a corner tangential coal-fired boiler, which comprises a central air pipe, and a primary air sleeve and a peripheral air sleeve are sequentially sleeved outside the central air pipe; a bluff body supporting column is arranged in the central air pipe, a plurality of axial rotational flow blades are arranged on the bluff body supporting column, a stable combustion bluff body is arranged at the air outlet end of the central air pipe, a plurality of ammonia spraying pipes are arranged at the air inlet end of the primary air sleeve, a flow guide plate and a primary air supporting plate are fixedly arranged in the primary air sleeve, and the flow guide plate is arranged in the axial direction of the central air pipe. The primary air sleeve is connected with the central air pipe through a primary air supporting plate; a peripheral air volute is arranged at the air inlet end of the peripheral air sleeve, a peripheral air supporting plate is arranged in the peripheral air sleeve, and the peripheral air sleeve is connected with the primary air sleeve through the peripheral air supporting plate. The coal-ammonia mixed combustion device is suitable for coal-ammonia mixed combustion, the ignition stability of pulverized coal can be improved, the carbon content of fly ash can be reduced while emission of nitric oxide is not increased, and carbon emission of a power station boiler is reduced.

Description

technical field [0001] The invention belongs to the field of combustion equipment and technology, and relates to a coal-ammonia mixed combustion burner used for a four-corner tangentially circular coal-fired boiler. Background technique [0002] In 2020, the global CO generated due to fossil energy consumption 2 Emissions were 34.81 billion tons, CO 2 The large amount of emissions caused great harm to the global atmosphere and ecology. Therefore, reducing carbon emissions has become a serious problem. Coal plays a dominant role in both the energy supply structure and consumption structure, and the power industry is the main industry of coal consumption. Therefore, the decarbonization of power station boilers needs to be focused on. [0003] Hydrogen and ammonia are widely concerned by scholars as a kind of "zero carbon" fuel. However, due to its high transportation and storage costs, and easy explosion, hydrogen restricts its wide application. The storage and transporta...

AI Technical Summary

Problems solved by technology

Coal-fired power plants have rich experience and mature technology in transporting and storing ammonia due to the use of SNCR and SCR technologies. However, ammonia is slightly less reactive than other gas fuels, and there is a problem of high nitrogen oxide emissions during lean combustion. shortcoming

Images