A coke oven circulating flue gas double control pipe network device and its application method

Abstract

The invention discloses a coke oven circulating flue gas double-control pipe network device and an application method thereof, belonging to the field of coke oven equipment in metallurgy and coking industries. The present invention includes a coke oven. The carbonization chamber and the combustion chamber in the coke oven are arranged alternately. The combustion chamber is separated into two parts communicated with each other by a vertical fire passage. Port B of the combustion chamber; the flue gas main pipe is connected to the chimney of the coke oven, and a circulation fan is installed on the flue gas main pipe; the mixing box is divided into two disconnected spaces, and each space is connected with the flue gas through a separate flue gas branch pipe. The main pipe is connected; the port A of the combustion chamber is respectively connected with the chimney, a space in the mixing box and the fuel inlet of the coke oven, and the port B of the combustion chamber is respectively connected with the chimney, another space in the mixing box and the fuel inlet of the coke oven. The invention optimizes and transforms the existing coke oven with low cost and low construction difficulty, and solves the problem that the nitrogen oxide discharge of the coke oven exceeds the standard.

Description

technical field [0001] The invention belongs to the field of coke oven equipment in the metallurgy and coking industries, and relates to a device and a method for reducing nitrogen oxides produced in a coke oven, more specifically, to a coke oven circulating flue gas double-control pipe network device and a use method thereof. Background technique [0002] Pollutants emitted from coke oven chimneys are mainly SO 2 , NO x And smoke and dust, etc., the pollutants are continuously discharged in the form of organized elevated point sources, which is one of the main pollution sources of polluting the atmosphere. When the gas burns in the vertical flue of the coke oven, it will generate nitrogen oxides NO x According to the mechanism of its generation, it can be divided into three types: temperature thermal type, hydrocarbon fuel fast type and oxygen-containing component fuel type. When the excess air coefficient α=1.1 and the air is preheated to 1100°C, the theoretical combust...

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Problems solved by technology

[0008] The purpose of the present invention is to adopt the flue gas circulation technology to solve the problem that coke oven optimization and transformation are difficult when the coke oven nitrogen oxide discharge exceeds the standard. It provides a coke oven circulating flue gas double control pipe network device and its use method, which are low cost. The existing coke oven has been optimized and transformed with low cost and low construction difficulty, and the problem of excessive nitrogen oxide emission from the coke oven has been solved

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