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Method for removal of hydrogen sulfide from lean amine solution

A hydrogen sulfide and amine liquid technology, applied in the field of environmental engineering, can solve the problems that hydrogen sulfide gas cannot be completely analyzed, affects the process, and the poor liquid is not poor, etc., and achieves the effect of long service life

Inactive Publication Date: 2019-01-15
赵学法
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

MDEA absorbs hydrogen sulfide and other acidic gases and becomes saturated and becomes rich liquid. The rich liquid enters the desorption tower for analysis and becomes lean liquid. However, after so many cycles, there will be a phenomenon that the lean liquid is not poor. The entire acid gas absorption system, which in turn affects the entire process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Sieve an appropriate amount of manganese sand of type 1 with an 80-mesh sieve to remove most of the sediment; put the obtained manganese sand into a beaker and wash with water to remove mud, then dry at 100°C, aerate and put it into a fixed bed; take an appropriate amount of lean Amine solution (H 2 The S content is 2000mg / L), add manganese sand fixed bed at a rate of 8ml / min for filtration and sampling, and stop sampling until the hydrogen sulfide content is detected with self-prepared deodorant. It shows that the manganese sand has been polluted at this time, its performance has declined, and it needs to be regenerated. After sampling, the hydrogen sulfide content of all the above samples was measured by iodometric method, and the hydrogen sulfide removal rate was more than 85% compared with the original lean amine solution.

Embodiment 2

[0015] Sieve an appropriate amount of 2-type manganese sand with a 150-mesh sieve to remove most of the sediment; put the obtained manganese sand into a beaker and wash with water to remove mud, then dry at 100°C, aerate and put it into a fixed bed; take an appropriate amount of lean Amine solution (H 2 S content is 2000mg / L), add manganese sand fixed bed at a rate of 10ml / min for filtration and sampling, and stop sampling until the hydrogen sulfide content is detected with self-made deodorant. It shows that the manganese sand has been polluted at this time, its performance has declined, and it needs to be regenerated. After sampling, the hydrogen sulfide content of all the above samples was measured by iodometric method, and the hydrogen sulfide removal rate was more than 85% compared with the original lean amine solution.

Embodiment 3

[0017] Sieve an appropriate amount of manganese sand of type 3 with a 200-mesh sieve to remove most of the sediment; put the obtained manganese sand into a beaker and wash with water to remove mud, then dry at 100°C, aerate and put it into a fixed bed; take an appropriate amount of lean Amine solution (H 2 The S content is 2000mg / L), adding manganese sand fixed bed at a rate of 12ml / min for filtration and sampling, and stop sampling until the hydrogen sulfide content is detected with self-prepared deodorant. It shows that the manganese sand has been polluted at this time, its performance has declined, and it needs to be regenerated. After sampling, the hydrogen sulfide content of all the above samples was measured by iodometric method, and the hydrogen sulfide removal rate was over 70% compared with the original lean amine solution.

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Abstract

The invention discloses a method for removal of hydrogen sulfide from a lean amine solution. The method includes: filling a fixed bed with manganese sand filler and filtering the feed liquid under normal pressure and temperature. The method has the advantages of simplicity, wide sources and low price of filler, and good hydrogen sulfide removal effect, and can be applied to removal of hydrogen sulfide from a lean amine solution.

Description

technical field [0001] The invention relates to a method for removing hydrogen sulfide in lean amine liquid, belonging to the technical field of environmental engineering. Background technique [0002] A large amount of acid gas containing hydrogen sulfide will be produced in petroleum processing, which will corrode equipment, pollute the environment, and seriously threaten personal safety. Therefore, the removal of acid gas is an essential link in petrochemical production. At present, the use of methyldiethanolamine (MDEA) to absorb acid gases such as hydrogen sulfide is the main method for petrochemical desulfurization. MDEA absorbs hydrogen sulfide and other acidic gases and becomes saturated and becomes rich liquid. The rich liquid enters the desorption tower for analysis and becomes lean liquid. However, after so many cycles, there will be a phenomenon that the lean liquid is not poor. The entire acid gas absorption system, which in turn affects the entire process. T...

Claims

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Application Information

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IPC IPC(8): B01D53/14
CPCB01D53/1425B01D53/1468B01D53/1493B01D2252/20489
Inventor 赵学法杜章森王迎春
Owner 赵学法
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