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Purification method for hydrogen sulfide containing gas

A hydrogen sulfide and gas technology, applied in the field of hydrogen sulfide purification and hydrogen sulfide purification in the exhaust gas discharged from refineries, can solve the problems of secondary pollution, complex process flow, blockage of process equipment, etc., to prevent fog entrainment, simple equipment, The effect of energy saving and consumption reduction effect

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The existing hydrogen sulfide pollution treatment methods mainly have problems such as secondary pollution, complex process flow, and blockage of process equipment.

Method used

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  • Purification method for hydrogen sulfide containing gas
  • Purification method for hydrogen sulfide containing gas
  • Purification method for hydrogen sulfide containing gas

Examples

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Embodiment 1

[0035] This embodiment adopts image 3 As shown in the process flow, the hydrogen sulfide content in the waste gas is 8000~10000mg / m 3 , gas volume is 500m 3 / h, the exhaust gas temperature is normal temperature, the pressure is slightly positive pressure, the absorption reactor 2 adopts a bubbling absorption structure, the height of the bubbling bed is 2.5m, and the absorbent is MDEA solution. The regeneration reactor 3 is a suspension bed reactor, the height of the suspension bed is 3m, and the regeneration agent is ferric oxyhydroxide, which has a honeycomb structure, and the pore diameter of the honeycomb is 8mm. In the regeneration reactor, the regenerant is packed in three layers. The flow direction of the liquid and the regeneration air in the regeneration reactor 3 is reverse flow, the liquid flows from the top to the bottom, and the flow velocity of the liquid is 1.5m / s. Sulfur powder filter set three, switching operation. After the exhaust gas is absorbed and pur...

Embodiment 2

[0037] This embodiment adopts figure 1 As shown in the process flow, the hydrogen sulfide content in the exhaust gas is 7000~8000mg / m 3 , gas volume is 300m 3 / h, the exhaust gas temperature is normal temperature, the pressure is slightly positive pressure, the absorption section 2 adopts packing absorption structure, adopts φ25mm saddle ring packing, packing height is 4m, and the absorbent is MDEA solution. The regeneration section is a suspended bed reactor with a suspension bed height of 3m. The desulfurization regeneration agent in the regeneration reaction section 3 is iron oxyhydroxide with a honeycomb structure. The pore diameter of the honeycomb is 10mm, and the regeneration agent is packed in 3 layers. The flow direction of the liquid and the regeneration air in the regeneration reactor 3 is reverse flow, the liquid flows from the top to the bottom, and the flow velocity of the liquid is 1.5m / s. Sulfur powder filter set three, switching operation. After the exhaust...

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Abstract

The invention relates to a purification method for a hydrogen sulfide containing gas. The purification method comprises the following steps: introducing hydrogen sulfide-containing gas into an absorption reactor, contacting and reacting with an absorbent, and then emitting the reacted up-to-standard gas; absorbing the reacted rich absorption liquid into a regenerative reactor, contacting a regenerant for regeneration reaction under the existence of an oxygen-containing gas, to obtain a regenerative absorption liquid and an elemental sulfur mixture, filtering and separating through a powdered sulfur filter, separating elemental sulfur and the regenerative absorption liquid, recycling the regenerative absorption liquid in the absorption reactor, collecting the elemental sulfur and feeding the elemental sulfur into a storage tank. According to the purification method for a hydrogen sulfide containing gas, normal-temperature recycling is carried out, the hidden safety hazards of technology equipment plugging, bed layer combustion, fog and froth entrainment of exhaust gas and the like can also be avoided, secondary pollutants generated during regeneration can be absorbed.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a method for purifying hydrogen sulfide, in particular to a method for purifying hydrogen sulfide in waste gas discharged from an oil refinery. Background technique [0002] A large amount of malodorous gas is volatilized from the tank tops of sulfur-containing sewage storage tanks and various oil intermediate storage tanks in refineries, and the tank top gas contains high concentrations of H 2 S, NH 3 , organic sulfides, oil gas, water vapor and air, the concentration of hydrogen sulfide in the exhaust gas can reach tens of thousands of milligrams per cubic meter. Gas emissions from the top of tanks produce odorous pollution and waste of resources. Therefore, both at home and abroad attach great importance to the emission reduction and treatment of various types of tank farm waste gas pollutants. [0003] The treatment methods of hydrogen sulfide pollutants mainly incl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/52
Inventor 廖昌建王筱喃刘忠生戴金玲高景山李经伟
Owner CHINA PETROLEUM & CHEM CORP
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