Preparation of sodium carbonate from waste lye

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As title. During the production of caustic soda by the falling film solid alkali method, a certain amount of waste alkali liquid is produced due to regular cleaning of the tableting and packaging systems, which is directly discharged to the sewage treatment device for adjustment by adding acid, causing a certain increase in production costs and a certain amount of waste. . The CO2 content of the exhaust gas after the combustion furnace is about 10% (volume fraction), and the flue gas flow is about 5000NM3/h. Accordingly, consider using waste alkali liquid to absorb and prepare a low-concentration sodium carbonate solution of about 10% for use in other production units in the device. Because excess flue gas is acceptable, a high absorption rate is not required. . At present, the dual-tower series absorption process has only been briefly clarified. There are many questions about the final product indicators and process control. Experts are also invited to give advice. In addition, if you know similar domestic design manufacturers or devices, please recommend them. Thank you now.