Cyclone pulverized coal burner

Abstract

The invention discloses a cyclone pulverized coal burner, which comprises a primary wind bended pipe, wherein an pulverized coal flow equalizing plate is arranged in the primary wind bended pipe, the center of the burner is provided with an oil gun sleeve pipe, a pulverized coal concentrating ring is arranged in a primary wind pipeline, the center of the front end of the primary wind pipeline is provided with a pulverized coal concentrating device, the outer side of the primary wind pipeline is respectively provided with a direct flow secondary wind passage and a secondary wind passage adopting radial sheets for generating cyclones. The flame shape and the wind mixing time can be controlled so that the goals of fast ignition, stable burning and nitrogen oxide (NOx) discharge control can be achieved.

Description

Technical field [0001] The invention relates to a swirling pulverized coal burner, which is applied to power station boiler equipment that burns pulverized coal, and relates to a radial swirling pulverized coal suitable for reducing the concentration of nitrogen oxides (NOx) and having good wear prevention burner. Background technique: [0002] Nitrogen oxides (NOx) are the main pollutants that cause air pollution. In addition to forming acid rain and destroying the ecological environment, they can also form photochemical smog, which endangers human health. According to the new GB13223-2003 "Emission Standard of Air Pollutants for Thermal Power Plants", coal-fired boilers are required to meet Vdaf>20%, and its Nox<450mg / Nm3, 10%<Vdaf<20% from January 1, 2004. Its Nox<650mg / Nm3, Vdaf<10%, and its Nox<1100mg / Nm3; and the total amount of Nox emissions must be charged on the premise that the emission concentration meets the standard, so the amount of NOx generat...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to design a swirling flow burner aimed at the defects existing in the background technology. By adopting a special structure and reasonable arrangement, it mainly solves the technical problem of large wear of the burner pulverized coal channel in the prior art. Direct secondary air volume and swirling secondary air volume and swirl intensity outside the primary air duct, control the mixing time and proportion of air powder, make the burner achieve high-efficiency and stable combustion, and effectively reduce nitrogen oxide emissions, providing a A swirl pulverized coal burner that can meet the combustion performance requirements and effectively reduce wear

Images