Coke oven burner double-flue supplemental heating method

Abstract

The invention relates to a coke oven burner double-flue supplemental heating method, which belongs to the field of heating combustion of a recuperative heat coke oven and a lean-gas-burning single heat coke oven. In the method, auxiliary afterflaming is performed in two sets of vertical flues in the burner on the machine and coke side of a lean gas heating coke oven in a coke oven rich gas lower-jet mode; a rich gas main pipe is arranged as a coke oven rich gas pipeline for supplemental heating; two rich gas distribution pipes are led out from the rich gas main pipe on the oven machine and coke side respectively and connected with lower jet pipes of the vertical flues in the burner; a copper ball valve and a stainless steel orifice plate are arranged on each jet pipe for regulating gas volume entering the flues; and the gas exchange is realized by a coke oven exchange and transmission device. The method can effectively solve the problem of insufficient heat supply to the burner when the lean gas is burnt in the coke oven, and the burner temperature is improved so as to meet the requirements of the technology. Therefore, the uniformity coefficient of the burner temperature is improved, the uniformity of whole oven temperature is ensured, the uniformity and maturity of the burner coke and whole oven coke are guaranteed, and the service life of the coke oven is prolonged.

Description

technical field [0001] The invention relates to the heating and combustion field of a reheating coke oven and a single-heating coke oven which only burns lean gas, and in particular relates to a method for supplementary heating of a coke oven burner with double channels. Background technique [0002] At present, the main function of the coke oven heating system is to transport and adjust the heating gas and air to the coke oven, and to discharge the exhaust gas after combustion. Rich gas refers to gas with high calorific value for coke oven heating, such as coke oven gas. Lean gas refers to gas with low calorific value for coke oven heating, such as blast furnace gas, producer gas and mixed gas. Because coke oven gas is an important high-quality fuel, coke oven gas should be used as little as possible and lean gas should be used as fuel for coke oven heating. The coke oven of the coking plant of the iron and steel complex is generally heated by blast furnace gas, but the b...

AI Technical Summary

Problems solved by technology

[0007] Due to the low calorific value of lean gas (generally 3100-3300kJ / Nm 3 , mixed gas at 4180kJ / Nm 3 ), the coke oven is heated by lean gas, and it is generally difficult to guarantee the furnace head temperature of 1100°C, especially after the furnace wall is damaged. Large coke blocks and low strength will affect the quality of coke; 2. If the coke is matured by increasing the standard temperature, the temperature of the furnace wall and the top space of the carbonization chamber will be high, and the output and quality of crude tar will not be effectively improved; at the same time, both The consumption of blast furnace gas has been increased, and the normal thermal management order has been seriously disturbed

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