Dense thin separator for reducing nitrogen oxide emission

Abstract

The invention relates to a dense thin separator for reducing nitrogen oxide emission. The dense thin separator comprises a pulverized coal inlet pipe (1), a pulverized coal main pipe (2) and a pulverized coal outlet pipe which are sequentially connected along the flowing direction of a pulverized coal airflow, the pulverized coal outlet pipe comprises a dense phase pulverized coal outlet pipe (3)and a thin phase pulverized coal outlet pipe (4), a guide plate (5) is arranged in the pulverized coal main pipe (2), the guide plate (5) is located between the dense phase pulverized coal outlet pipe(3) and the thin phase pulverized coal outlet pipe (4), the pulverized coal main pipe (2) is of a bent pipe structure, and a sudden expansion pipe (6) is arranged at the end part of the dense phase pulverized coal outlet pipe (3). Compared with the prior art, the dense thin separation effect on pulverized coal is enhanced, and emission of nitrogen oxide can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of combustion, in particular to a concentration-lean separator for reducing nitrogen oxide emissions. Background technique [0002] According to statistics from relevant departments, the annual power generation in 2017 was 6,275.8 billion kWh, of which thermal power generation could reach 4,611.5 billion kWh, accounting for nearly 73.5% of the total annual power generation. my country's special energy structure with rich coal, poor oil and little gas means that my country's electricity will be mainly composed of coal-fired power generation for a long time in the future. With the increasing economic and comprehensive national strength of our country, the accompanying environmental problems are becoming more and more serious, and people's pursuit of the environment is getting higher and higher. Therefore, the State Council and various localities have put forward stricter requirements for the emission standards...

AI Technical Summary

Problems solved by technology

In this patent, due to the limitation of the primary wind speed and the structure of the first-stage nozzle, the wind speed of the pulverized coal inlet should not be too high. The flow field in the inertial separator and its pulverized coal pipeline makes the pulverized coal more turbulent in the pipeline, which is extremely likely to cause pulverized coal clogging, and a pair of pulverized coal flame stabilizers (4) can disturb the pulverized coal But it is limited to both sides and has little influence on the mainstream

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