High-efficiency NOx double-vortex rotational flow pulverized coal burner

Abstract

The invention discloses a high-efficiency NOx double-vortex rotational flow pulverized coal burner and relates to the technical field of clean energy combustion. The problems that an existing rotational flow pulverized coal burner is poor in coal type adaptation, the NOx discharging inhibiting technology is not complete, and high-efficiency low NOx pulverized coal combustion is hardly achieved aresolved. By means of the high-efficiency NOx double-vortex rotational flow pulverized coal burner, combustion classification is conducted, traditional primary air pulverized coal air flow is divided into an inner strand and an outer strand with the same coal quality or the different coal quality; thick air flow and thin air flow are separate, in other words, an inner conical concentrator and an outer conical concentrator are used for conducting thick and thin separation on inner and outer primary air pulverized coal air flow; classification air distribution is conducted, wherein inner secondary air and outer secondary air which are independently controlled respectively are matched and cooperated with the inner and outer primary air pulverized coal air flow to be sprayed into a furnace, anda center pipe provides center air; and absolute ignition combustion stabilization based on inner vortex rotational flow pulverized coal air flow ignites outer vortex rotational flow pulverized coal air flow constantly, and generation of various kinds of NOx is effectively reduced. The high-efficiency NOx double-vortex rotational flow pulverized coal burner is mainly used for achieving pulverizedcoal ignition combustion stabilization and efficient low NOx combustion.

Description

technical field [0001] The invention relates to the technical field of clean energy combustion. Background technique [0002] Today, the proportion of coal in China's primary energy composition is still over 70%, which is 40 percentage points higher than the world's average level. About 4.5 billion tons. The average comprehensive utilization efficiency of power generation and heat supply in China is only about 40%, which is 10 percentage points lower than that of developed countries. 2 90%, NOx 75%, total suspended particulates 60%, CO 2 75%. Among China's proven exploitable coal reserves, low-quality coal accounts for about 50%, and the proportion of anthracite and lean coal alone is close to 30%, and a large amount of coke produced by lignite upgrading or low-temperature pyrolysis is in urgent need of new combustion and gasification technologies To be used cleanly and efficiently. Thermal power generated by direct combustion of coal accounts for more than 70% of China...

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to solve the problem that the existing swirling flow pulverized coal burner has poor coal type adaptability, and the incomplete NOx emission suppression technology is difficult to realize high-efficiency and low-NOx pulverized coal combustion, and provides a high-efficiency and low-NOx dual-swirl pulverized coal burner

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