System for removing hydrogen sulfide in coke oven gas and desulfurization method

Abstract

The invention discloses a system for removing hydrogen sulfide in coke oven gas and a desulfurization method. The system comprises a rotational flow mist curtain absorption column, wherein a rotatingshaft penetrates through the rotational flow mist curtain absorption column and synchronously rotates with a variable frequency motor through a transmission mechanism; a plurality of layers of liquidthrowing barrel units are fixed to the rotating shaft; each layer of the liquid throwing barrel unit is provided with a plurality of liquid throwing barrels; a liquid feeding pipe penetrates through the inner wall of the rotational flow mist curtain absorption column and extends to the position above the liquid throwing barrels and a downcomer rotational flow plate; a rich liquid tank is communicated with a liquid outlet of the rotational flow mist curtain absorption column; a barren liquid tank is communicated with the liquid feeding pipe; a primary cooler is communicated with a gas inlet ofthe rotational flow mist curtain absorption column; the demister is communicated with a gas outlet of the rotational flow mist curtain absorption column; and the liquid throwing barrels enable the barren liquid to form a homogeneous phase mist curtain to be in contact with the coke oven gas for mass transfer and absorption of H2S. The system for removing hydrogen sulfide is simple in structure, high in desulfurization efficiency, small in desulfurization column size and large in treatment 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 The emission standard of S needs to reduce liquid film...

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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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