Economizer water feeding system capable of adjusting inlet smoke temperature of denitration reactor

Abstract

The invention discloses an economizer water feeding system capable of adjusting the inlet smoke temperature of a denitration reactor and belongs to the field of boiler tail smoke treatment. The economizer water feeding system comprises a boiler, the boiler communicates with a smoke passage, the smoke passage is internally provided with a high-temperature economizer, the denitration reactor, a low-temperature economizer, an upper-stage air preheater and a lower-stage air preheater in the smoke conveying direction in sequence, and boiler smoke enters the smoke passage from the boiler and flows through the high-temperature economizer to perform heat release to reach an appropriate temperature to enter the denitration reactor to perform denitration reaction. According to the economizer water feeding system capable of adjusting the inlet smoke temperature of the denitration reactor, traditional series connection water feeding is changed into a form of series and parallel connection feedingwater jointly, the effect of adjusting the inlet smoke temperature of the denitration reactor is achieved by adjusting the water feeding amount of all segments of the high-temperature economizer and the low-temperature economizer to adjust the heat exchange amount, the temperature of the smoke entering the denitration reactor can be maintained within the optimal reaction temperature range of a catalyst all the time, the fact that the denitration reaction can be performed continuously and efficiently is guaranteed, and the nitrogen oxide emission concentration of the boiler tail smoke is stabilized.

Description

technical field [0001] The invention relates to the field of flue gas treatment at the boiler tail, in particular to an economizer water supply system capable of adjusting the flue gas temperature at the inlet of a denitrification reactor. Background technique [0002] In recent years, due to the continuous deterioration of the environment, how to control the source of environmental pollution and reduce the discharge of pollutants has become the top priority of industrial production. In my country's existing energy structure, coal power occupies a major share, and a large amount of coal burned in the process of coal-fired power generation can easily become an important factor affecting air pollution control. In order to deal with environmental problems such as nitrogen oxides, sulfides, and smoke generated by coal-fired power generation, the state has gradually raised the flue gas emission standards in a targeted manner, and urged all coal-fired power generation companies to...

AI Technical Summary

Problems solved by technology

Due to the needs of production, it is usually difficult for the boiler to operate at the rated load for a long time, and generally needs to be operated with variable load, so it will affect the temperature of the flue gas entering the denitration reactor, and ultimately affect the denitrification effect of the boiler flue gas

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