A post-combustion burner for diesel engine

Abstract

The invention provides a post-combustion burner for diesel engines. The outer cylinder wall of the burner is nested and arranged outside the inner cylinder wall of the burner. One end of the inner cylinder wall of the burner is sealed and an ignition gun and an oil gun are arranged. The inner cylinder of the burner The other end of the wall is opened as the flue gas outlet, and there are flue gas inlets on the inner cylinder wall of the burner and the side wall of the outer cylinder wall of the burner; Set behind the nozzle of the burner. The invention improves fuel ignition conditions by preheating air, and ensures the normal combustion of fuel with a small flow rate during low-power and low-oxygen operation; the two-stage atomization method makes fuel particles smaller in diameter and more evenly distributed Combustion is better in an oxygen environment; by adjusting the relative position of the inner and outer sleeves of the oil gun, the fuel flow can be adjusted to facilitate more precise control of the exhaust temperature; the two-stage nozzle structure at the head of the oil gun can fully accelerate the fuel and atomization medium, and strengthen The atomization effect makes the fuel burn better.

Description

technical field [0001] The invention belongs to the technical field of industrial burners, in particular to a post-combustion burner for diesel engines. Background technique [0002] Due to insufficient combustion, diesel engines will emit toxic gases such as carbon monoxide and nitrogen oxides. At present, the method of treating nitrogen oxides in tail gas is mainly selective catalytic reduction method, that is, using a reducing agent containing ammonia under the action of a catalyst to reduce nitrogen oxides in tail gas into pollution-free nitrogen and water. The reduction reaction temperature is required to be 300-400°C. However, the exhaust temperature of ordinary diesel engines is difficult to meet the requirements, so it is necessary to increase the exhaust temperature first and then carry out the selective catalytic reduction SCR treatment. Therefore, it is necessary to develop a post-firing burner that can increase the temperature of the exhaust gas of the diesel e...

AI Technical Summary

Problems solved by technology

Moreover, the heating power required to increase the temperature of the flue gas is generally small. Therefore, compared with ordinary burners, the afterburner burner uses less fuel, and factors such as spray gun clogging have a more significant impact on the performance of the afterburner burner. It is also more difficult to precisely adjust the power of the burner

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