A method for controlling low-nitrogen combustion of waste incinerators

Abstract

The invention provides a low-nitrogen combustion control method of a garbage incineration furnace. A water-cooled separating screen is arranged in a furnace chamber of the garbage incineration furnace. The furnace chamber is divided into two parts of a front furnace chamber body and a back furnace chamber body in the transverse direction, and flue gas produced by the incineration furnace is separated into front flue gas and back flue gas. The front flue gas produced by a drying section and a pyrolysis section flows in the front furnace chamber body, the back flue gas produced by a combustion section and a burnout section flows in the back furnace chamber body, and the high-temperature back flue gas is in a low oxygen environment. The flue gas temperature T and the mixed flue gas temperature after the combustible composition of the front furnace chamber flue gas is completely burned (assuming 100% burnout) are worked out by detecting data such as the flue gas temperature at an outlet ofthe front furnace chamber body, the flue gas temperature at an outlet of the back furnace chamber body, the flue gas temperature at an outlet of a mixed furnace chamber, the data of the combustible composition content (CH4,CO,H2 and the like) and oxygen content O21 in the outlet flue gas of the front and the back furnace chamber bodies and the like. The delayed or advance control over ignition ofbed garbage is carried out, so that the aim of restraining and reducing the formation of NOx (nitrogen oxides) is achieved.

Description

technical field [0001] The invention relates to garbage treatment equipment, in particular to a method for controlling low-nitrogen combustion of a garbage incinerator. Background technique [0002] Compared with landfill, composting and other waste treatment technologies, incineration treatment technology has obvious effects of volume reduction and weight reduction, is completely harmless, and occupies a small area. In addition, waste heat can also be used for heating or power generation, reducing secondary pollution. With the advantages of less and controllable, it has gradually become the mainstream technology of municipal solid waste treatment in my country. With the large-scale application and development of incineration technology, the focus of people's attention has shifted from what incineration technology can handle to how to deal with it well, how to recycle the energy in garbage as much as possible, improve utilization efficiency and how to reduce secondary polluta...

AI Technical Summary

Problems solved by technology

Although this patent solves the risk of increasing the amount of fly ash in the flue gas at the boiler outlet, this technology is not much different from the flue gas recirculation technology that extracts flue gas from the outlet of the waste heat boiler or bag filter and sends it to the incinerator. The circulating flue gas pipeline needs to be kept warm to prevent low-temperature corrosion. At the same time, more equipment is added, the operation and maintenance workload is heavy, the cost is high, and the operation control is also relatively complicated.

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