Micro-oil ignition system and method applicable to W-type flame boiler

Abstract

The invention discloses a micro-oil ignition system and a micro-oil ignition method applicable to a W-type flame boiler. The micro-oil ignition system comprises a pulverized coal preparation system, a pulverized coal storage system, a pulverized coal conveying system, a boiler body, a micro-oil ignition pulverized coal burner, an original burner and a pulverized coal distributor, wherein the pulverized coal preparation system, the pulverized coal storage system, the pulverized coal conveying system, the pulverized coal distributor, the micro-oil ignition pulverized coal burner and the boiler body are sequentially connected; the micro-oil ignition pulverized coal burner is arranged on the front and rear arches of the boiler body; the pulverized coal conveying system comprises a middle pulverized coal chamber, an electric valve, a pulverized coal conveying auger, a blanking pipe, a Roots blower, an air and pulverized coal mixer, a pulverized coal conveying auger motor and a primary air supply pipe. An original pulverized coal preparation system of a power plant is not changed, so that the safety and reliability of the original pulverized coal preparation system are ensured, and the micro-oil ignition system has the advantages of high oil saving rate, simplicity, low equipment investment, low operation cost and the like, can be widely applied to ignition and low-load steady burning processes of the W-type flame boiler, and has certain market competitiveness.

Description

technical field [0001] The invention relates to a micro-oil ignition system, in particular to a micro-oil ignition system suitable for a W-shaped flame boiler and a method thereof. Background technique [0002] The total amount of coal resources in my country is abundant. According to statistics, the national predicted coal reserves are 2.6 trillion tons, of which anthracite accounts for 12% of the national coal reserves and is widely distributed. There are more than 20 provinces in the country that have anthracite resources to varying degrees. Anthracite usually has the characteristics of high degree of coalification, low volatile matter content and high ash content, and the high degree of coalification also makes its lithofacies structure compact and stable, with small porosity and low reactivity. Therefore, in the actual combustion process, anthracite coal There are often problems of difficulty in ignition, stable combustion, and burnout. The required ignition temperature...

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Problems solved by technology

[0005] These technologies generally have problems such as low fuel saving rate, complicated operation, failure of the pulverizing system, and fire extinguishing in the furnace. , the pulverizing system for grinding anthracite is still used, which causes the system to operate under design conditions, which is likely to cause failure of the pulverizing system, and even cause the system to explode in severe cases

In addition, some power plants have adopted the conventional micro-oil ignition technology, but this technology is generally used to ignite coal with high volatile content, but it is directly used to ignite anthracite with low volatile content, which may cause it to be difficult to ignite quickly and burn stably. Shortcomings, resulting in boiler flameout or still need to invest a lot of oil guns for ignition and stable combustion

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