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A method for suppressing foaming of dethiamin absorbent

An absorbent and amine solution technology, which is applied in the direction of foam dispersion/prevention, can solve the problems of desulfurization system flooding, affecting operation, solution foaming, etc., and achieve the effect of ensuring stability, suppressing foaming, and good stability

Active Publication Date: 2017-09-05
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, alcohol amine solvents will degrade after being used for a period of time, resulting in performance degradation, causing foaming of the solution, causing flooding of the desulfurization system, and directly affecting the operation

Method used

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  • A method for suppressing foaming of dethiamin absorbent
  • A method for suppressing foaming of dethiamin absorbent

Examples

Experimental program
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Embodiment

[0015] Implementation example: Take 20mL of desulfurization solution and put it into the foam height test tube ( figure 1 ), put them into a constant temperature water bath at a temperature of (40±1)°C, and keep the temperature constant for 10 minutes. After the nitrogen gas passes through the rotameter, it passes through the bottom inlet of the foam height test tube. When the flow rate reaches 450mL / min and stabilizes, start timing. Ventilate for 5 minutes, stop the ventilation, record the foam height (the difference between the final foam height of the liquid surface and the initial solution height) and the defoaming time (when the gas is stopped, the foam has just burst and clear liquid is seen).

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Abstract

The invention relates to a method for suppressing the foaming of a desulfurized amine absorbent, in particular to suppressing the foaming of the amine absorbent by adding a certain amount of defoamer into the amine absorbent. The defoamer used refers to a compound defoamer composed of at least two kinds of simethicone, tributyl phosphate, and polyethylene glycol. The defoamer of the present invention is mixed into the amine solution, and its concentration ranges from 0.01 to 0.5%. (wt). The defoamer of the invention has a simple production process and low cost, can be used in a small amount and in a wide temperature range, prevents foaming of the amine aqueous solution, and effectively suppresses flooding of the desulfurization system.

Description

technical field [0001] The invention belongs to the field of gas purification, and in particular relates to a novel defoamer for suppressing the foaming of organic amine desulfurizers. Background technique [0002] The alkanolamine method has been used to remove H from the feed gas of natural gas, petroleum and its processing industry. 2 The mainstream method of S. In recent decades, the amine process has continued to develop and has made great progress, forming a variety of alternative amine desulfurization and decarburization solutions, such as monoethanolamine, diethanolamine, triethanolamine, methyl monoethanolamine and methyldiethanolamine, etc. . However, the alcohol amine solvent will degrade after being used for a period of time, resulting in a decrease in performance, causing foaming of the solution, causing flooding of the desulfurization system, and directly affecting the operation. Contents of the invention [0003] The purpose of the present invention is to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D19/04
Inventor 毛松柏余勇朱道平周志斌陈园园宋丽
Owner CHINA PETROLEUM & CHEM CORP