Fuel-free gas igniting and combustion stabilizing method for industrial coal powder boiler

Abstract

The invention relates to a fuel-free gas igniting and combustion stabilizing method for an industrial coal powder boiler, solving the problem that cold air powder feed and cold air or low temperature air for combustion affect the adaptability of the coal type in the existing industrial coal powder boilers. The method is characterized in that the mixture of primary air and the coal powder is jetted from a primary air pipe with a central pipe arranged on the axis to form coal powder airflow distributed on the internal and external layers; the air containing ozone or the oxygen containing ozone is jetted from the central pipe, and then a gas ignition gun is adopted to ignite the gas and further ignite the coal powder airflow on the internal layer under the support of the air containing ozone or the oxygen containing ozone, thus igniting the coal powder airflow on the external layer; the ozone accounts for 7-8% of the air or the oxygen in the central pipe by volume, and the oxygen in the central pipe (1) accounts for 5.5-7.5% of the oxygen in the primary air pipe (2) by volume. The method realizes that ignition in the industrial coal powder boiler does not need fuel at all, saves cost, ensures wide adaptability of the coal type and is conductive to market promotion of the industrial coal powder boiler.

Description

technical field [0001] The invention relates to a method and device for igniting and stabilizing combustion of a pulverized coal industrial boiler, in particular to a method and device for igniting and stabilizing combustion of an oil-free coal gas industrial boiler for pulverized coal. Background technique [0002] my country is a country that uses coal as the main energy source. Boiler combustion of pulverized coal is one of the main forms of coal utilization in my country, involving various industries. At present, the ignition and stable combustion of large and medium-sized pulverized coal boilers mostly use fuel oil, which consumes a large amount of fuel oil every year, causing huge pressure on boiler users in terms of operating costs; It is an urgent issue to be solved in the pulverized coal boiler industry to find and develop alternative fuel ignition and stable combustion pulverized coal combustion technology. In recent years, domestic pulverized coal industrial boil...

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Problems solved by technology

[0003] In order to solve the problem that existing pulverized coal industrial boilers use cold air to feed powder, cold air or low-temperature air to support combustion, which affects the adaptability of coal types, the present invention provides an oil-free gas ignition and stable combustion of pulverized coal industrial boilers with strong coal type adaptability Method and device

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