Process and device for cold-state ignition of a low-emission boiler

Abstract

The invention relates to a technology and a device for cold-state ignition of a low-emission boiler. The technology is characterized in that one part of combustible gas generated during the preparation of active coke is delivered to the position where an ignition gun is located to be ignited, passed pulverized coal flow is ignited, pulverized coal mixture after being ignited is burnt in a boiler main burning area after being ignited, another part of the combustible gas is delivered to a boiler reburning area and is formed into reducing ambinent under the condition that the excess air coefficient is less than 1, nitric oxide generated in the boiler main burning area can be reduced, and thus the reburning denitration can be realized. According to the technology and the device, disclosed by the invention, the combustible gas generated by an active coke preparation furnace is ignited by the ignition gun, the ignition temperature of gas fuel is low, needed ignition heat is less, the gas fuel can be quickly ignited, the pulverized coal flow can be rapidly ignited, the purpose of low emission of nitric oxide can be realized at the same time, and the denitration efficiency can be up to 45%-65%.

Description

technical field [0001] The invention relates to a process and device for boiler ignition and reburning denitrification by using by-products in the preparation of active coke. Background technique [0002] With the development of my country's national economy, the demand for energy is increasing day by day, and the proven amount of petroleum resources in my country is limited. At present, my country spends a large amount of foreign exchange to import oil every year. The electric power industry is a large consumer of fuel oil. According to the statistics of electric power in recent years: thermal power coal-fired units account for about 74.8% of the total installed capacity, and the oil consumption is about 2.33 million tons, accounting for 31.9% of the total oil consumption, mainly for boiler ignition oil. Combustion-supporting and stable-combustion oil during low-load operation. In order to reduce the consumption of oil resources, it is imminent to vigorously develop new t...

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a low-emission boiler cold-state ignition process and device, which can not only realize oil-free ignition, but also replace the existing oil gun ignition that consumes a large amount of fuel and the plasma with high cost and complex structure. Ignition device, and can realize low emission of nitrogen oxides, and make full use of by-products produced in the process of active coke preparation

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