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Wet oxidation desulfurization system for Claus hydrogenation tail gas, and desulfurizationmethod thereof

A wet oxidation and desulfurization system technology, applied in chemical instruments and methods, separation methods, sulfur preparation/purification, etc., can solve the problems of high energy consumption for regulation, poor sulfur quality, secondary pollution, etc., and achieve the reduction of hydrogen sulfide Concentration, separation of sulfur, and effect of recycling

Pending Publication Date: 2021-06-29
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the alcohol ammonia solvent will decompose at high temperature to produce a variety of thermally stable salts, and the solvent stability is poor. During this process, the temperature control and adjustment consume a lot of energy, and will produce difficult-to-treat organic industrial wastewater, resulting in secondary pollution.
[0006] The complex iron method generally has problems such as large amount of secondary salts, secondary pollution caused by high-salt organic wastewater discharged outside, poor quality of sulfur, and poor resource efficiency.
In addition, the operating cost is high, and various chemical auxiliary agents need to be added to control the pH of the desulfurization system and the morphology of sulfur

Method used

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  • Wet oxidation desulfurization system for Claus hydrogenation tail gas, and desulfurizationmethod thereof
  • Wet oxidation desulfurization system for Claus hydrogenation tail gas, and desulfurizationmethod thereof
  • Wet oxidation desulfurization system for Claus hydrogenation tail gas, and desulfurizationmethod thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] A Claus hydrogenation tail gas wet oxidation desulfurization system, such as figure 1 As shown, it includes buffer tank 1, power wave scrubber 2, absorption tower 3, regeneration tower 4, settling tank 5, washing tank 6 and filter bag centrifuge (not shown); wherein the model of filter bag centrifuge is PSB600;

[0077] The buffer tank 1 is provided with an air inlet 11, and the Claus hydrogenation tail gas enters the buffer tank 1 from the inlet 11 to separate gas and liquid. The top wall of the buffer tank 1 is connected with the first pipeline 12, and the first pipeline 12 A first valve (not shown) and a booster fan (not shown) are installed on the top, wherein the installation method of the booster fan and the first valve is the prior art; the booster fan is a Roots blower, and the wind power of the booster fan The adjusted pressure is 10-98kpa;

[0078] Such as figure 2 As shown, the first nozzle 21 is installed in the power wave scrubber 2, and the number of t...

Embodiment 2

[0098] Preparation method of desulfurization liquid

[0099] Made of iron-based ionic liquid and organic solvent, the volume ratio of iron-based ionic liquid and organic solvent is 2:1, and the organic solvent in this embodiment is dimethylacetamide.

[0100] The preparation method of the iron-based ionic liquid comprises the following steps: mixing methylimidazole and n-butane chloride according to a molar ratio of 1:1, reacting for 72 hours under the condition of reflux at 80° C. to prepare alkylimidazole chloride, and then Alkylimidazole chloride and ferric chloride are mixed at a molar ratio of 1:2 to prepare an iron-based ionic liquid.

[0101] The desulfurization solution in this embodiment does not need to strictly control the pH value, and is applicable to a wide range of temperatures.

Embodiment 3

[0103] The difference between this example and Example 2 is that the organic solvent is N-methylpyrrolidone.

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Abstract

The invention discloses a wet oxidation desulfurization system for Claus hydrogenation tail gas, and relates to the technical field of industrial tail gas desulfurization. The system comprises a buffer tank, a booster fan, a dynamic wave washer, an absorption tower, a regeneration tower, a settling tank, a washing tank and a filter bag centrifuge. The invention also provides a desulfurization method adopting the organic phase iron-based ionic liquid desulfurization system. The desulfurization system disclosed by the invention has the beneficial effects that the desulfurization system disclosed by the invention can realize wet-process oxidation desulfurization of Claus hydrogenation tail gas, meanwhile, desulfurization liquid cyclic regeneration and sulfur separation are realized, through a dynamic wave-absorption tower-washing tank three-step treatment process, the desulfurization efficiency of hydrogen sulfide reaches 99.9% or above, the pH of a desulfurization system and the morphology of sulfur particles do not need to be regulated and controlled in the desulfurization process, and secondary pollution is avoided.

Description

technical field [0001] The invention relates to the technical field of industrial tail gas desulfurization, in particular to a Claus hydrogenation tail gas wet oxidation desulfurization system and a desulfurization method. Background technique [0002] h 2 S is a gas with a pungent odor, usually produced in natural gas, refinery gas, synthesis gas, coking gas, oilfield associated gas, water gas, etc. For high concentrations of H 2 S gas is usually processed by the Claus method, the principle is that the H 2 S passes into the Claus combustion furnace, part of H 2 S burns to SO 2 , the H after combustion 2 S and SO 2 The oxidation-reduction reaction is carried out in the Claus reactor, and the sulfur is separated through two or three stages of catalytic conversion and cooling and condensation. At this time, the total sulfur concentration is still around 10,000ppm. In response to this situation, hydrogenation technology is usually used to convert sulfur dioxide and organ...

Claims

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Application Information

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IPC IPC(8): B01D53/79B01D53/52C01B17/05
CPCB01D53/52B01D53/79C01B17/05
Inventor 余江孙冉殷玮乡张瑜高帅涛熊成铭张茹霞施王军汪杰
Owner BEIJING UNIV OF CHEM TECH
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