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Method for regenerating organic amine desulfurizer by bipolar membrane electrodialysis

A bipolar membrane electrodialysis, organic amine technology, applied in electrodialysis, separation methods, chemical instruments and methods, etc., can solve the problems of difficult operation, unstable sulfurous acid, waste of resources, etc., and achieve simplified operation procedures and stable operation. The effect of sexual enhancement and conductivity increase

Inactive Publication Date: 2006-07-26
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantage is that only thermally regenerable salt RNHSO is formed by conventional electrodialysis 3 , it needs further thermal regeneration to convert into organic amine; need to use another substance sulfurous acid to cause waste of resources, and sulfurous acid is unstable and difficult to operate

Method used

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  • Method for regenerating organic amine desulfurizer by bipolar membrane electrodialysis
  • Method for regenerating organic amine desulfurizer by bipolar membrane electrodialysis
  • Method for regenerating organic amine desulfurizer by bipolar membrane electrodialysis

Examples

Experimental program
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Effect test

Embodiment 1

[0015] according to figure 1 The bipolar membrane electrodialysis device with the configuration of BP-C-A membrane cell assembled as shown, that is, titanium ruthenium-coated electrode, plexiglass plate, plexiglass separator, The fluorinated rubber gasket, the bipolar membrane (BP), the cation exchange membrane (C) and the anion exchange membrane (A) are assembled into a bipolar membrane electrodialysis device with a membrane cell repeating unit, forming four corresponding compartments respectively Cathode compartment, alkali compartment, salt compartment and anode compartment, the volume of each compartment is 6.3cm 3 . Each compartment is then connected to an external submersible pump and a beaker (1000mL) through latex tubes to form four independent circulation loops. The cathode chamber, the alkali chamber and the anode chamber are perfused with sodium sulfate (Na 2 SO 4 ) solution, the salt chamber perfusion concentration is 0.18mol / L, and the solution volume is 0.5L ...

Embodiment 2

[0018] Similar to the membrane cell assembly steps of Example 1, press figure 2 As shown, a BP-C membrane cell configuration bipolar membrane electrodialysis device assembled with a membrane cell repeating unit forms three corresponding compartments, respectively a cathode compartment, an alkali compartment and an anode compartment. Both the cathode chamber and the alkali chamber are filled with sodium sulfate (NaSO4) with a concentration of 0.3mol / L and a solution volume of 0.5L 2 SO 4 ) solution, the piperazine sulfate (Pz·H 2 SO 4 ) solution, the solutions of the three compartments circulate independently. Other operating conditions are identical with embodiment 1.

[0019] Using this device to regenerate piperazine, the concentration of piperazine in the alkali chamber will reach 0.015mol / L after 1 hour of electrification.

Embodiment 3

[0021] Similar to the assembly steps of embodiment 1, press image 3 As shown, a BP-A membrane cell configuration bipolar membrane electrodialysis device assembled with a membrane cell repeating unit forms three corresponding compartments, namely a cathode compartment, a salt / alkali compartment and an anode compartment. Both the cathode chamber and the anode chamber were perfused with sodium sulfate (Na 2 SO 4 ) solution, the salt / alkali chamber perfusion is 0.18mol / L, and the solution volume is 0.5L piperazine sulfate (Pz H 2 SO 4 ) solution, the solutions of the three compartments circulate independently. Other operating conditions are identical with embodiment 1.

[0022] Use this device to regenerate piperazine, and the concentration of piperazine in the base chamber will reach 0.005mol / L after 1 hour of electrification.

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Abstract

The invention relates the method of regenerating the organic amine desulfurizing agent with two-pole films electrodialysis, comprising the following steps: pouring the heat stability saline solution formed by organic amine at the course of desulfurizing into one of salt chamber, salt / alkali chamber, salt / acid chamber and anode chamber in two-pole films electrodialysis unit, pouring electrolyte solution to the other chambers, the cathode and anode of the unit are connected with negative pole and positive pole of direct current source to control the electric current density which is 10-200mA / cm2; the cation of heat stability saline combined with hydroxide ion to form organic amine. The method has the advantages of simple operating procedure, low energy consumption, and easy assemblage. The method is propitious to extend the organic amine desulfurizing technique.

Description

Technical field: [0001] The invention belongs to the field of membrane technology, in particular to a method for regenerating an organic amine desulfurizer by bipolar membrane electrodialysis. Background technique: [0002] For environmental protection and sustainable development, countries all over the world have set increasingly strict standards for the emission of sulfur dioxide. After many years of research and exploration, there are many alternative flue gas desulfurization methods, such as the absorption method, adsorption method, and oxidation method mentioned in "Air Pollution Control Engineering" (Beijing: Higher Education Press. 1996), "U.S. The electrochemical membrane conversion method and the radio frequency plasma conversion method mentioned in the Journal of the Institution of Chemical Engineers (AIChE Journal, 1994, 40: 143-151; 1998, 44: 323-331; 2004, 50: 524-529). The wet absorption method has become a common method for flue gas desulfurization due to its...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/96B01D61/42
Inventor 徐铜文黄川徽
Owner UNIV OF SCI & TECH OF CHINA
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