Device and method for purifying organic amine solution

A device for purifying an organic amine solution, comprising an ion exchange bed (X1),

• wherein the ion exchange bed (X1) has an upper feeding port, through which the ion exchange bed (X1) is communicated with an inert gas cylinder (C1), a fifth liquid storage tank (T5) and a second liquid adding pump (P2) by pipelines, a first flow meter (F1) is provided on an outlet pipeline of the inert gas cylinder (C1), and a seventh valve (V7) is provided on a discharging pipeline of the fifth liquid storage tank (T5);
• wherein the ion exchange bed (X1) has a lower feeding port, through which the ion exchange bed (X1) is communicated with a first liquid adding pump (P1) by a pipeline, and the first liquid adding pump (P1) has an extraction port, through which the first liquid adding pump (P1) is communicated with a first liquid storage tank (T1) by a pipeline;
• wherein the ion exchange bed (X1) has a lower discharging port, through which the ion exchange bed (X1) is communicated with a second liquid storage tank (T2), a third liquid storage tank (T3) and a fourth liquid storage tank (T4) by pipelines, a multiple total reflection infrared spectrum analyzer (D1) is provided on a discharging pipeline from a lower end of the ion exchange bed (X1), a third valve (V3) is provided on a feeding pipeline of the second liquid storage tank (T2), a fourth valve (V4) is provided on a feeding pipeline of the third liquid storage tank (T3), and a fifth valve (V5) is provided on a pipeline communicating the fourth liquid storage tank (T4) with the ion exchange bed (X1) through the lower discharging port;
• and
• wherein the ion exchange bed (X1) has an upper discharging port, through which the ion exchange bed (X1) is communicated with the fourth liquid storage tank (T4) by a pipeline, and a second valve (V2) is provided on a pipeline communicating the fourth liquid storage tank (T4) with the ion exchange bed (X1) through the upper discharging port.