Gas-solid separating method and system for simple substance sulphur in sulphur-containing exhaust

A technology of gas-solid separation and elemental sulfur, applied in the field of environmental pollution control, can solve the problems of waste of sulfur resources, secondary pollution, etc., and achieve the effects of reducing desulfurization costs, efficiency, energy saving and environmental protection, and stable and efficient treatment

Active Publication Date: 2019-06-21
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the tail gas treated by these methods still contains a small amount of elemental sulfur particles, which will not only cause waste of sulfur resources, but also cause secondary pollution and other problems.

Method used

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  • Gas-solid separating method and system for simple substance sulphur in sulphur-containing exhaust
  • Gas-solid separating method and system for simple substance sulphur in sulphur-containing exhaust

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039]A gas-solid separation method for elemental sulfur in sulfur-containing tail gas, comprising the following steps:

[0040] S1. Rapidly cool down the sulfur-containing tail gas to below 25°C, so that the elemental sulfur vapor in the sulfur-containing tail gas condenses into elemental sulfur solid particles, and the elemental sulfur solid particles and dust particles settle to the extraction tank;

[0041] S2. Carry out low-temperature washing to the tail gas, the washing liquid is a low-temperature heavy liquid phase solvent, the tail gas after washing is discharged, and the washed liquid flows into the extraction tank, the dust is dissolved in the light liquid phase in the extraction tank, and the light liquid is discharged. Elemental sulfur particles are dissolved in the heavy liquid phase in the extraction tank;

[0042] S3, pumping out the heavy liquid, heating it to 90°C by irradiation, collecting elemental sulfur particles, and evaporating at the same time to produ...

Embodiment 2

[0045] A gas-solid separation method for elemental sulfur in sulfur-containing tail gas, comprising the following steps:

[0046] S1. Rapidly cool down the sulfur-containing tail gas to below 20°C, so that the elemental sulfur vapor in the sulfur-containing tail gas condenses into elemental sulfur solid particles, and the elemental sulfur solid particles and dust particles settle to the extraction tank;

[0047] S2. Carry out low-temperature washing to the tail gas, the washing liquid is a low-temperature heavy liquid phase solvent, the tail gas after washing is discharged, and the washed liquid flows into the extraction tank, the dust is dissolved in the light liquid phase in the extraction tank, and the light liquid is discharged. Elemental sulfur particles are dissolved in the heavy liquid phase in the extraction tank;

[0048] S3, pumping out the heavy liquid, heating it to 70°C by irradiation, collecting elemental sulfur particles, and evaporating at the same time to prod...

Embodiment 3

[0051] A gas-solid separation method for elemental sulfur in sulfur-containing tail gas, comprising the following steps:

[0052] S1. Rapidly cool down the sulfur-containing tail gas to below 10°C, so that the elemental sulfur vapor in the sulfur-containing tail gas condenses into elemental sulfur solid particles, and the elemental sulfur solid particles and dust particles settle to the extraction tank;

[0053] S2. Carry out low-temperature washing to the tail gas, the washing liquid is a low-temperature heavy liquid phase solvent, the tail gas after washing is discharged, and the washed liquid flows into the extraction tank, the dust is dissolved in the light liquid phase in the extraction tank, and the light liquid is discharged. Elemental sulfur particles are dissolved in the heavy liquid phase in the extraction tank;

[0054] S3, pumping out the heavy liquid, heating it to 50°C by irradiation, collecting elemental sulfur particles, and evaporating at the same time to prod...

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Abstract

The invention discloses a gas-solid separating method and a gas-solid separating system for simple substance sulphur in sulphur-containing exhaust. The gas-solid separating method for simple substancesulphur in sulphur-containing exhaust comprises the following steps: first, cooling sulphur-containing exhaust at an extremely high speed; then, separating dust; finally, recycling a heavy liquid phase solvent and simple substance sulphur; according to the method disclosed by the invention, the separating efficiency of the simple substance sulphur is up to 90 percent or above; moreover, the exhaust is further purified, and an environment pollution accident is avoided; in a separating process of the simple substance sulphur, the heavy liquid phase solvent of the simple substance sulphur evaporates to form a gas phase solvent which can be recycled as the liquid phase solvent for reusing through cooling, so that the sulphur removing cost is reduced. The system comprises a quick cooling system, a low-temperature washing purifying system, a light liquid phase and heavy liquid phase separating system, a washing liquid recycling system and a simple substance sulphur recycling system. The system disclosed by the invention has the advantages of stability and high efficiency in high sulphur-containing exhaust treatment, high simple substance sulphur separating efficiency, energy conservation and environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution control, and in particular relates to a gas-solid separation method and system for elemental sulfur in sulfur-containing tail gas. Background technique [0002] As an important chemical raw material, sulfur and sulfur products are widely used in various sectors of the national economy such as agriculture, chemical industry, light industry, metallurgy, building materials, and medicine. At present, the sulfur produced in the world mainly comes from natural sulfur deposits, sour natural gas, high-sulfur crude oil, high-sulfur iron ore and non-ferrous metal sulfides. The availability of these sulfur resources depends on their recovery costs. Therefore, as environmental regulations become more and more stringent , the proportion of recovered sulfur in sulfur resources will become larger and larger. H in the present sulfur tail gas 2 S can be oxidized to elemental sulfur by the Claus m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/033
CPCC01B17/021B01D47/06B01D53/1425B01D53/1431B01D2257/30B01D2258/01Y02P20/50B01D53/1493B01D53/185B01D2252/10
Inventor 宋辛宁平孙鑫马懿星李凯田森林
Owner KUNMING UNIV OF SCI & TECH
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