Oxygen-enriched combustor suitable for deep peak regulation

Abstract

The invention discloses an oxygen-enriched combustor suitable for deep peak regulation. A central oxygen pipe is arranged in the center of the combustor, a primary air powder pipe is concentrically arranged on the outer layer of the combustor, a secondary oxygen pipe is arranged on the outer layer of the primary air powder pipe, and an inner secondary air pipe is perpendicularly arranged on the secondary oxygen pipe. Inner secondary air entering from the inner secondary air pipe and oxygen in the secondary oxygen pipe are mixed and then enter the combustor through the same pipeline, a hinder is arranged at an outlet of the secondary oxygen pipe, an outer secondary air pipe is arranged on the outer layer of the inner secondary air pipe, and a swirler is installed at an outlet of the outer secondary air pipe. According to the oxygen-enriched combustor, rich oxygen introduction is stopped under the normal operation state of the unit, original stable combustion is maintained, rich oxygen is introduced for combustion supporting when the unit enters the deep peak regulation state, and the problem that combustion is unstable under low-load operation when a boiler participates in deep peak regulation can be solved; and the problems of burner nozzle damage caused by high temperature under oxygen-enriched combustion, NO rising caused by high oxygen concentration and the like are solved, and the flexibility of a thermal power generating unit participating in peak regulation is improved.

Description

technical field [0001] The invention relates to the technical field of high-efficiency combustion of pulverized coal boilers, in particular to an oxygen-enriched burner mainly suitable for deep peak regulation of a unit. Background technique [0002] In recent years, the proportion of new energy power generation has increased year by year, and the operating environment of thermal power units has become more and more changeable, and will mainly participate in the operation as peak-shaving units. Therefore, on the premise of ensuring the safety of the equipment, how to make the boiler burner burn stably when the unit participates in peak regulation has become the focus of research at this stage. Oxygen-enriched combustion technology can accelerate fuel combustion, significantly increase flame temperature, avoid combustion instability under low-load operation, and effectively solve the above problems. However, there are still some problems to be solved urgently in the oxy-fuel...

AI Technical Summary

Problems solved by technology

However, there are still some problems to be solved urgently in the oxy-fuel combustion technology, for example, high local heat load, the burner nozzle is easy to burn; high oxygen concentration and high flame temperature, easy to form thermal NO, etc.

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