Staged air supplying and heating device and method for combustion chamber of coke furnace

Abstract

The invention discloses a staged air supplying and heating device and method for a combustion chamber of a coke furnace and relates to coke furnace equipment. The staged air supplying and heating device comprises an automatic heating and temperature adjustment system, an oxygen-enriched-air secondary air supply and distribution system and an oxygen-enriched-air air supply pipeline system; the oxygen-enriched-air secondary air supply and distribution system comprises a secondary air pipeline which communicates with oxygen enrichment making equipment through an air blower, the secondary air pipeline passes through the combustion chamber from the top of the combustion chamber, and the tail end of the secondary air pipeline is located at the middle-upper part of the combustion chamber; the oxygen-enriched-air air supply pipeline system is an inclined air conduit which communicates the bottom of the combustion chamber and the top of a regenerative chamber, and an air inlet steep bank is formed in the bottom of the regenerative chamber; the automatic heating and temperature adjustment system is electrically connected with an oxygen-enriched-air flowmeter, an air flowmeter, a gas flowmeter and a temperature measuring device. The device and the method can be extensively applied to coke furnaces of 4.3m and 5.5m and are beneficial to the improvement on nitrogen oxides of chimneys of the coke furnaces and the uniform heating of the coke furnaces, the quality of coke is improved, and the volume of heating coal gas for the coke furnaces is reduced, so that the device and the method have certain economic benefit.

Description

technical field [0001] The invention relates to coke oven equipment, in particular to a segmented air supply heating device for a coke oven combustion chamber and a method thereof. Background technique [0002] When the gas is burned in the coke oven combustion chamber, nitrogen oxides, including NO, N 2 O , NO 2 , N 2 o 3 , N 2 o 4 , N 2 o 5 etc., while the nitrogen oxides in the atmosphere are mainly NO and NO 2 Exists in the form of NO, usually about 95%, NO 2 is about 5%, NO in the atmosphere will slowly convert to NO 2 . [0003] There are three types of formation mechanisms for the formation of nitrogen oxides in the combustion process: one is fuel-type nitrogen oxides, which are formed by fixing nitrogen in the fuel; the other is thermal nitrogen oxides, which are formed by the reaction of nitrogen and oxygen at high temperatures; the third is instantaneous type, nitrogen oxides are formed due to the presence of carbon-containing free radicals. The nitr...

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Problems solved by technology

[0005] In order to solve the problem of high concentration of nitrogen oxides in the flue gas existing in the existing small and medium volume coke ovens, a coke oven combustion chamber staged gas supply heating device and method thereof are provided

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