What is the role of reflux ammonia in a absorption tower, and what causes a sudden drop in the bottom temperature?
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What is the role of reflux ammonia in a single absorption tower? What are the reasons for a sudden drop in temperature at the bottom of a single absorption tower? (Aqueous solution process) This post was last edited by lxq700918 on 2009-2-27 at 18:59.]
What is the role of reflux ammonia in a absorption tower? It is to carry out distillation on the gas exiting from the top; in other words, it absorbs carbon dioxide and water while distilling ammonia. What causes a sudden drop in the temperature at the bottom of a absorption tower? Generally, it is due to an empty liquid level.
Purposes of adding recycled ammonia: 1. Maintain thermal balance in the absorption tower; 2. Reduce the water content in the gas phase; 3. Increase the ammonia partial pressure in the gas phase; 4. Maintain a certain ammonia-to-carbon ratio. Reasons for a sudden drop in temperature at the bottom of the absorption tower: 1. A sudden increase in the amount of ammonia at the bottom; 2. A sudden drop in the decomposition temperature
Purpose of adding recycled ammonia: 1. To maintain the thermal balance of the absorption tower and keep the solution at a certain temperature, so that the melting point of the solution is lower than its boiling point. 2. Reduce the water content in the gas phase to increase the purity of the recovered ammonia. 3. Increase the ammonia partial pressure in the gas phase to reduce the carbon dioxide partial pressure. 4. Maintain a certain ammonia-to-carbon ratio so that its equilibrium pressure equals the operating pressure. Reasons for the sudden drop in temperature at the bottom of the absorption tower: 1. Sudden increase in the amount of ammonia returning to the system; 2. Sudden drop in the decomposition temperature; 3. Decrease in the temperature of the deionized water; 4. Reduction in the synthesis load
I. ⑴ Maintain thermal equilibrium in the absorption tower; ⑵ Condense water vapor in the gas phase within the distillation section; ⑶ Increase the partial pressure of ammonia in the gas phase while minimizing the partial pressure of CO2; ⑷ Achieve a concentration of 89% in the concentrated ammonia solution (in the washing section) to meet the requirements for washing CO2. II. ⑴ Desorb NH3 and CO2; ⑵ Decompose urea in the hydrolysis tower; ⑶ Recover the reaction components from the second step through desorption; ⑷ Condense the desorbed gases in the reflux condenser.