Environment-friendly ultra-clean type burner for sulfur recovery tail gas incineration

Abstract

The invention discloses an environment-friendly ultra-clean type burner for sulfur recovery tail gas incineration. The environment-friendly ultra-clean type burner comprises a burner barrel, a primaryfuel spray gun, secondary fuel spray guns and porous medium bodies, wherein the burner barrel is provided with a center rotational flow wind channel allowing first oxidizing air to penetrate throughand an external axial flow wind channel allowing second oxidizing air to penetrate through; the primary fuel spray gun is matched with the center rotational flow wind channel in position; the secondary fuel spray guns are matched with the external axial flow wind channel in position; and the porous medium bodies are installed at one end of the burner barrel and allow fuel and the oxidizing air tobe burnt after the fuel and the oxidizing air are mixed in the porous medium bodies. By adoption of the porous medium staged combustion technology, the fuel and the oxidizing air are premixed inside the porous medium bodies, part of heat generated by premixed gas combustion is transmitted to an upstream low-temperature area to preheat unburnt mixed gases from a downstream high-temperature area, nolocal high-temperature area can be produced, the fuel can be burnt completely in the oxygen-rich state, the CO production amount in flue gas is reduced, and therefore the problem that the CO concentration in the flue gas exhausted from a sulfur recovery tail gas incinerator burner exceeds the standard is solved fundamentally.

Description

technical field [0001] The invention relates to the technical field of tail gas desulfurization equipment, in particular to an environmentally friendly ultra-clean burner for sulfur recovery tail gas incineration. Background technique [0002] At present, the burner of the sulfur recovery unit incinerates the residual sulfide in the purified sulfur tail gas to generate SO 2 , the remaining H 2 and hydrocarbons combusted into H 2 O and CO 2 , After the high-temperature flue gas after incineration passes through other heat exchange equipment to recover heat, the flue gas temperature drops to about 300°C and is discharged into the atmosphere through the chimney. [0003] According to the "Petroleum Refining Industry Pollutant Discharge Standard" GB31570-2015, the flue gas SO 2 The emission is not higher than 100mg / m3. Studies in recent years have shown that CO in flue gas has a significant effect on off-line SO 2 The monitoring has a positive bias, methane is partially on...

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome SO 2 The detection concentration is prone to deviation and cannot meet the environmental protection requirements, thus providing an environmentally friendly ultra-clean burner for sulfur recovery tail gas incineration

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