Fuel nozzle, solid fuel combustion system and preheating combustion method

A fuel inlet and nozzle technology, which is applied in the field of clean and efficient combustion of solid fuel, can solve the problems of difficult to achieve ultra-low NOx emission and stable combustion, and achieve the effect of increasing the reaction residence time and the conversion rate of hot semi-coke fuel.

Pending Publication Date: 2022-03-29
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

However, the existing traditional technology is difficult to achieve flexible deep peak regulation, wide load regulation, low load stable combustion, and ultra-low NOx boilers. In the process of wide load (20-100%) regulation and low load stable combustion, it is also difficult to achieve ultra-low NOx emissions, combined with denitrification technology. stable combustion

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  • Fuel nozzle, solid fuel combustion system and preheating combustion method
  • Fuel nozzle, solid fuel combustion system and preheating combustion method

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Embodiment Construction

[0046] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. But following embodiment only limits to explain the present invention, and protection scope of the present invention should comprise the whole content of claim, and by the narration of following embodiment, those skilled in the art can fully realize the whole content of claim of the present invention.

[0047] The invention relates to an ultra-low NOx separation cavity nozzle with wide load adjustment and low load stable combustion.

[0048] A specific embodiment of the present invention, such as figure 1 As shown, an ultra-low NOx separation chamber nozzle with wide load adjustment and low load stable combustion, the separation chamber nozzle includes a straight cylinder part and a cone cylinder part from top to bottom. The cone part is fixedly connected with the lower part of the straight part, a top cover is arranged above the straight part...

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Abstract

The invention discloses a fuel nozzle, a solid fuel combustion system and a preheating combustion method. The nozzle comprises a straight cylinder part, and a cover is arranged above the straight cylinder part; a secondary air inlet is formed in the cover; the straight cylinder part comprises two cylinder sections with different diameters, the two cylinder sections with different diameters are fixedly connected, and the preheating fuel inlet and the tertiary air inlet are respectively formed in the two cylinder sections with different diameters. And the preheated fuel inlet is used for introducing preheated fuel. On the basis of preheating modification nitrogen reduction of the preheating combustor, re-gasification nitrogen reduction of a nozzle of the separation cavity, longitudinal on-way multi-layer tertiary air addition, airflow rotation of the separation cavity, on-way layered secondary gasification, nitrogen reduction and reaction retention time increase are achieved, the conversion rate of hot semicoke fuel is increased, and ultralow NOx emission and stable combustion are achieved.

Description

technical field [0001] The invention relates to the technical field of clean and efficient combustion of solid fuels, in particular to a fuel nozzle, a solid fuel combustion system and a preheating combustion method. The fuel nozzle is an ultra-low NOx separation chamber nozzle with wide load adjustment and low load stable combustion. Background technique [0002] Facing carbon peaking in 2030, carbon neutral technology requirements in 2060, and the formulation and implementation of national macro policies, how to effectively achieve ultra-low NOx emissions and stable combustion of pulverized coal boilers in the process of wide-load regulation of coal power and stable combustion at low loads The carbon peaking and carbon neutrality of coal power is the top priority of the country's "3060" dual carbon goals, and it is also a major demand for the rapid transformation of coal power into a basic energy peak-shaving supply and supporting national economic development. [0003] T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C6/04F23C7/00C10J3/66
CPCF23C6/04F23C7/00C10J3/66Y02E20/34Y02P20/129
Inventor 刘敬樟朱建国吕清刚欧阳子区朱书骏满承波曾雄伟
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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