Study And Transformation Of Low Pressure Boiler Use Only Blast Furnace Gas

This article from the low-pressure boiler burning case study, the BFG's own characteristics, the mechanism of the boiler combustion, combustion, heat transfer systems, air systems, ignition systems, security systems and control systems in areas such as in-depth research, the development of low calorific value combustion technology, On the boiler combustion system equipment, fire equipment, security equipment and control systems technology, according to the boiler and auxiliary equipment to optimize boiler rated power load to achieve a 4 # 100% of the low-pressure boiler combustion and stable operation of BFG.(1) the current low-pressure boilers burning high calorific value of the boiler fuel, with 0 to 100% of the coke oven gas, from 0 to 65% of blast furnace gas, from 0 to 90% of the converter gas, as well as from 0 to 100% of the heavy oil burning capacity of all gas works The status of all the needs of the coke oven gas fire and security. The article studied the mechanism of combustion gas boiler, the boiler equipment modified to achieve the ultimate abolition of the use of coke oven gas, blast furnace gas to achieve 100% combustion condition.(2) BFG, as well as the physical properties of combustion characteristics of the study. BFG blast furnace gas is produced in the process of smelting furnace of mixed gases, the main combustible components for CO, H2 and CH4 few of which can not be gas-75%, BFG because of the low calorific value fuel, the atmosphere in the environment to leave open flame on the flame, Can not burn, how to stable combustion safety is a key issue. BFG theory of combustion temperature in 1400 ~ 1500℃, in most circumstances must be under air and gas to preheat the combustion stability.(3) BFG low calorific value, burning flame is dark, ultra-violet weak, the boiler is used in flame detectors can not detect the stability of the flame burning BFG signal, the impact of the boiler combustion reliability of the security chain. Through a variety of flame monitors the selection, use of the latest type of adjustable ultraviolet flame detectors, to ensure the detection of low-pressure boiler to burn the whole BFG flame burning.(4) In the boiler heating surface is not adjusted, BFG and combustion air preheat are not the case, the burner to reform, improve the ability of burning BFG. On the combustion air distribution system and the transformation of the furnace flame detection devices to meet the needs of a stable combustion. The modification technology of the boiler for low calorific value fuel gas is the first case, and low-pressure boilers to achieve 100% combustion of BFG purpose of the enterprise for years income more than 8,000,000 yuan.