A system and desulfurization method for removing hydrogen sulfide in coke oven gas

Abstract

A system and desulfurization method for removing hydrogen sulfide in coke oven gas, the system includes a swirling fog curtain absorption tower, a rotating shaft passes through the swirling fog curtain absorbing tower, and synchronously rotates with a frequency conversion motor through a transmission mechanism, and the rotating shaft There are several layers of liquid rejection barrel units fixed on the top, each layer of liquid rejection barrel unit is equipped with multiple liquid rejection barrels, and the liquid inlet pipe passes through the inner wall of the swirling fog curtain absorption tower and extends to the top of the liquid rejection barrel and the downflow swirl plate The liquid-rich tank is communicated with the discharge port of the swirl mist curtain absorption tower, the lean liquid tank is communicated with the liquid inlet pipe, and the primary cooler is communicated with the air inlet of the swirl mist curtain absorption tower, except The mist device is connected to the exhaust port of the swirling fog curtain absorption tower, and the liquid dumping bucket makes the poor liquid form a homogeneous fog curtain to contact with the coke oven gas for mass transfer and absorb H 2 S. The hydrogen sulfide removal system of the invention has the advantages of simple structure, high desulfurization efficiency, small desulfurization tower volume and large processing capacity.

Description

technical field [0001] The invention relates to the field of designing chemical equipment, in particular to a system and a desulfurization method for removing hydrogen sulfide in coke oven gas. Background technique [0002] For desulfurization treatment of hydrogen sulfide in industrial gases, the widely used existing wet desulfurization mainly adopts traditional packed tower equipment to absorb hydrogen sulfide. The tower equipment of this technology is bulky, the equipment investment is large, the liquid circulation volume is large, the air resistance is high, it is inconvenient to start and stop, and the operation cost of the equipment is high. Relying on the gravity field to flow from top to bottom, so the liquid film is thick, the liquid velocity is low, and the residence time is long, resulting in H 2 S and CO 2 At the same time, it is absorbed, resulting in a greatly reduced alkali utilization. So to reach H 2 Emission standards need to reduce liquid film turbulen...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to prolong the residence time of the sulfur-containing gas flow in the rotary desulfurization tower without increasing the height of the tower body, so that the fog curtain droplets can fully contact with the sulfur-containing gas flow while maintaining the minimum particle size Mass transfer to improve the absorption rate of hydrogen sulfide by liquid droplets; another technical problem solved by the invention is not to increase the tower space, reduce investment, reduce the resistance of the existing rotary desulfurization tower, prevent the clogging of the existing rotary desulfurization tower, and prevent the desulfurization efficiency. reduce

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