Abstract
The article presents modern burner devices for power and industrial boilers that provide NOx emissions (when burning natural gas — 125 mg/m3, when burning fuel oil — 250 mg/m3). The burners are equipped with modern ignition safety devices and injectors. There are also new burners for combustion of blast furnace, coke oven and natural gas. Combustion of gases with diff erent properties causes certain diffi culties associated with providing operational parameters of power plants. Diff erences in the characteristics of combustible fuels also determine the diff erences in the course of combustion processes, emission characteristics of the fl are, and volumes of combustion products. The article gives successful examples of the operation of combined burners. Also considered in the article are the peculiarities of the organization of the furnace process for co-incineration of blast furnace gas, coke oven gas and natural gas in boiler furnaces from 100 to 500 t/h. The article provides guidelines on combustion of low-calorifi c by-products of industrial enterprises (blast furnace gas, coke oven gas, etc.). An important factor for solving environmental problems is the need to recycle liquid and gaseous wastes of powerful industrial enterprises. We have developed special ovens for neutralizing industrial effl uents and various gases. The main technical solutions for the organization of combustion of gaseous and liquid wastes are given in the article. Two variants of furnace arrangements (vertical and horizontal) are presented. A furnace with a burner for burning water-coal suspension is also of considerable interest. Materials are presented on new developments of various types of heat generators: with internal refractory and fi reproof lining and those completely made of metal (air-cooled, internal fl ame tube made of steel Х18Н9Т, outer housing — steel 20). Special combustion chambers can be used to neutralize gaseous and liquid wastes.
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