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Purification method of amine liquid

An amine liquid and lye tank technology is applied in the field of separation of processing liquids, which can solve the problems of short equipment utilization cycle, poor quality of purified amine liquid, and high production cost, so as to improve the use efficiency and utilization cycle, reduce filtration costs, and improve The effect of service life

Active Publication Date: 2014-04-02
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for purifying amine liquid, which is a method for purifying amine liquid based on foam separation, using existing mechanical filtration, activated carbon adsorption and ion exchange devices for amine liquid purification, A foam separator is added before the above device to remove the surface active substances that cause the foaming of the amine liquid, thereby prolonging the cleaning cycle of the subsequent mechanical filtration, the replacement cycle of activated carbon adsorption, and the regeneration cycle of the ion exchange device, which overcomes the existing simple mechanical The filtration method has the shortcomings of poor quality of purified amine liquid, short equipment utilization period and high production cost, and also overcomes the shortcomings of the existing membrane separation method, such as high price and serious membrane pollution

Method used

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  • Purification method of amine liquid

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A. The device used

[0039] The device used in the purification method of amine liquid includes amine liquid tank 1 to be treated, foam separator 2, mechanical filter 3, activated carbon adsorber 4, anion exchanger 5 and lye tank 6, wherein foam separator 2 is equipped with insulation Layer gas self-circulating foam separator, mechanical filter 3 is a core filter, activated carbon adsorber 4 is a fixed-bed activated carbon adsorption tank, anion exchanger 5 is a fixed-bed anion exchanger, through valve 7, pump 8 and pipelines The amine solution tank 1 to be treated, the foam separator 2, the mechanical filter 3, the activated carbon adsorber 4, the anion exchanger 5 and the alkali solution tank 6 are sequentially connected to form the device used in the process flow of the purification method of the amine solution;

[0040] B. Process flow

[0041] The first step, the situation of the amine solution to be treated

[0042] The amine liquid to be treated in the amine li...

Embodiment 2

[0056] A. The device used

[0057] With embodiment 1.

[0058] B. Process flow

[0059] The first step, the situation of the amine solution to be treated

[0060] The amine liquid to be treated in the amine liquid tank 1 is the methyldiethanolamine solution being used in the natural gas desulfurization system of a petrochemical refinery, and no treatment is required before foam separation;

[0061] The second step, foam separation

[0062] In addition to making the flow range of the foam separator 2 be 12m 3 Except / h, other is with embodiment 1;

[0063] The third step, mechanical filtration

[0064] With embodiment 1;

[0065] The fourth step, activated carbon adsorption

[0066] With embodiment 1;

[0067] The fifth step, ion exchange

[0068] With embodiment 1.

[0069] The comparison data of different methyldiethanolamine solution quality results before and after the treatment of this embodiment are shown in Table 2

[0070] Table 2. The quality data comparison...

Embodiment 3

[0073] A. The device used

[0074] With embodiment 1.

[0075] B. Process flow

[0076] The first step, the situation of the amine solution to be treated

[0077] The amine solution to be treated in the amine solution tank 1 is a waste methyldiethanolamine solution with strong foamability and high foam stability in a petrochemical refinery, and no treatment is required before foam separation.

[0078] The second step, foam separation

[0079] In addition to making the flow range of the foam separator 2 be 20m 3 Except / h, other is with embodiment 1;

[0080] The third step, mechanical filtration

[0081] With embodiment 1;

[0082] The fourth step, activated carbon adsorption

[0083] With embodiment 1;

[0084] The fifth step, ion exchange

[0085] With embodiment 1.

[0086] Table 3 shows the comparison data of the quality results of different waste methyldiethanolamine solutions before and after the treatment in this embodiment.

[0087] Table 3. Comparison of wa...

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Abstract

The invention discloses a purification method of amine liquid, relates to a separation method of processing liquid of taking a separating machine device as characteristics, and in particular relates to an amine liquid purification method based on foam separation. The existing mechanical filtering, activated carbon adsorption and ion exchange devices for purifying the amine liquid are utilized, and a foam separator is added in front of the devices and used for removing a surface active material of causing foaming of the amine liquid. Thus, the cleaning cycle of subsequent mechanical filtering, the replace cycle of activated carbon adsorption, and the regeneration cycle of the ion exchange device are prolonged, the defects that the existing simple mechanical filtering method is poor in amine liquid purification quality, short in equipment utilization cycle, and high in production cost are overcome, and the defects of high price and serious membrane pollution of the existing membrane separation method are also overcome.

Description

technical field [0001] The technical solution of the present invention relates to a separation method for processing liquid characterized by a separation mechanical device, specifically a method for purifying amine liquid. Background technique [0002] At present, in the prior art, the most widely used purification method for amine liquid is based on mechanical filtration combined with activated carbon adsorption technology or / and ion exchange technology. Literature "Cao Shengwei, Lu Jingyi, Cao Aijuan, et al. Operation and optimization of the amine liquid system of a high-sulfur purification device [J]. Petrochemical Automation, 2011, 06:54-58."; "Yan Zhao, Huang Changmeng, Jia Haomin, et al. .Comprehensive filter selection of amine liquid in natural gas purification treatment[J].Petrochemical Application,2012,01:87-91.";"Zhang Lixia.Application of rapid shallow bed ion exchange technology in amine liquid purification[J]. Guangzhou Chemical Industry, 2010,07:209-211."; "CN...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 陈文义孙兵孙姣
Owner HEBEI UNIV OF TECH
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