Wet desulphurization sulfur flotation device and method

Abstract

The invention relates to a wet desulphurization sulfur flotation device and method, and belongs to the technical field of chemical engineering. The wet desulphurization sulfur flotation device comprises a regeneration tank, a Roots blower or an air compressor, an air aeration connecting pipeline and an air aeration membrane pipe; the Roots blower or the air compressor is communicated with the air aeration membrane pipe through an air aeration connecting pipeline; and the air aeration membrane pipe is positioned in the regeneration tank. Air bubbles formed by the tubular aeration membrane are small, the air utilization rate is high, the size of regeneration equipment is small, the height of the regeneration equipment is not more than 10 m and is less than or equal to 1/4 of that of high tower regeneration equipment, and the equipment investment cost is obviously reduced. A rotary stirrer is driven by hydraulic power, so that sulfur is always kept in a suspended state in the desulfurization liquid, sedimentation and accumulation of the sulfur are avoided, and flotation of the sulfur is facilitated. And no extra energy is supplemented in the stirring process.

Description

technical field [0001] The invention relates to a wet desulfurization sulfur flotation device and method, belonging to the technical field of chemical industry. Background technique [0002] Typical chelated iron (also known as complexed iron) wet desulfurization technology such as Chinese invention patent CN108130147A describes this desulfurization process: the sulfur-containing raw material gas (usually greater than 10KPa) with a certain pressure enters the desulfurization tower, and the top flow The desulfurized liquid is contacted in countercurrent to carry out the chemical absorption of liquid-phase catalytic oxidation. After the desulfurized liquid absorbs the hydrogen sulfide in the raw material, the hydrogen in the gas is purified. 2 S content less than 10PPM is sent out of the boundary through the pipeline after the mist is removed by the mist trapping section. Absorbed H 2 All the desulfurization solution of S is sent to the regeneration tank for air oxidation re...

AI Technical Summary

Problems solved by technology

However, in practical applications, it is found that the passive supply of this kind of air determines that it is difficult to self-adjust according to the actual demand; more importantly, the throat of the jet regenerator is easily blocked, resulting in the actual amount of regenerated air being much less than Design value, which seriously affects the overall efficiency of the device

[0008] It can be seen that for the separation and recovery of sulfur in wet desulfurization, whether to use sedimentation separation or flotation separation has its own advantages and disadvantages.

For the sedimentation separation process, if an air pulse loosening device is installed in the sulfur sedimentation tank to periodically make the settled and compacted sulfur fluffy and easy to flow, the equipment is difficult to manufacture and the control method is complicated

For the flotation process, the high-tower regeneration technology with relatively stable performance has a huge investment in equipment, and it is difficult to bear the expensive equipment investment for small and medium-scale desulfurization; the jet regeneration technology with high air utilization rate and relatively small equipment size exists. The air volume is difficult to adjust independently according to the actual demand, and there is a serious defect that the throat of the injection regenerator is easily blocked, resulting in the actual amount of regenerated air being far less than the design value

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