[Urea Knowledge] Daily Question (105) 2010.04.15
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This post was last edited by Xinjiu on 2010-4-14 at 18:43. Hide the answer; no scoring will be given unless it is hidden. Specific hiding method: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2%D8 Fill-in-the-blank question: 26. Based on the flow pattern of the liquid phase within the synthesis tower, it can be divided into ( ), ( ), and ( ) among others. 27. The factors that affect the operation of a stripping tower are ( ), ( ), ( ). 28. Currently, the main stripping process methods include ( ), ( ), and ( ). 29. The current main production methods for urea include ( ), ( ), ( ), ( ) and so on. 30. The factors that affect the formation of biuret are ( ), ( ), ( ), ( ) and ( ). Answer to the reply: 26. Based on the flow pattern of the liquid phase within the synthesis tower, it can be classified into three types: (ideal displacement type), (ideal mixing type), and (transitional type). 27. The factors that affect the operation of a stripping tower are (temperature), (liquid-to-gas ratio), and (residence time). 28. Currently, the main stripping processes include (CO2 stripping process), (NH3 stripping process), and (shift gas stripping process). 29. The current main production methods for urea include the (full-circulation aqueous solution method), (CO2 stripping method), (NH3 stripping method), (modified C method), and others. 30. The factors that affect the formation of biuret include (ammonia concentration), (temperature), (residence time), (evaporation rate), and (the influence of acidic and alkaline substances).
26. Based on the flow pattern of the liquid phase within the synthesis tower, it can be classified into three types: (ideal displacement type), (ideal mixing type), and (transitional type). 27. The factors that affect the operation of a stripping tower are (temperature), (liquid-to-gas ratio), and (residence time). 28. Currently, the main stripping processes include (carbon dioxide stripping), (ammonia stripping), and (shift gas stripping). 29. The current main production methods for urea include the (full-circulation aqueous solution method), (carbon dioxide stripping method), (ammonia stripping method), (modified C method), and others. 30. The factors that affect the formation of biuret include (temperature), (ammonia pressure), (residence time), (evaporation rate), and (the influence of acidic or basic substances).
26. Based on the flow pattern of the liquid phase within the synthesis tower, it can be classified into three types: (ideal displacement type), (ideal mixing type), and (transitional type). 27. The factors that affect the operation of a stripping tower are (temperature), (liquid-to-gas ratio), and (residence time). 28. Currently, the main stripping processes include (carbon dioxide stripping process), (ammonia stripping process), and (shift gas stripping process). 29. The current main production methods for urea include the (full-circulation aqueous solution method), (carbon dioxide stripping method), (ammonia stripping method), (modified C method), and others. 30. The factors that affect the formation of biuret include (ammonia concentration), (temperature), (residence time), (evaporation rate), and the influence of acidic and basic substances.
26. Based on the flow pattern of the liquid phase within the synthesis tower, they can be classified into three types: (ideal displacement type), (ideal mixing type), and (transitional type). 27. The factors affecting the operation of a stripping tower are (temperature), (vapor-liquid ratio), and (residence time). 28. Currently, the main stripping processes include (CO2 stripping process), (NH3 stripping process), and (shift gas stripping process). 29. The current main production methods for urea include the (full-circulation aqueous solution method), (CO2 stripping method), (NH3 stripping method), (modified C method), and others. 30. The factors that affect the formation of biuret include (ammonia concentration), (temperature), (residence time), (evaporation rate), and the influence of acidic and basic substances.
26. Ideal displacement type, ideal mixed type, transitional type 27. Temperature, liquid-to-gas ratio, residence time 28. CO2 stripping process, NH3 stripping process, shift gas stripping process 29. Complete water solution circulation method, CO2 stripping method, NH3 stripping method, modified C method 30. Ammonia concentration, temperature, residence time, evaporation rate, influence of acidic and alkaline substances
26. Based on the flow pattern of the liquid phase within the synthesis tower, it can be divided into three types: (laminar flow), (turbulent flow), and (counterflow). 27. The factors that affect the operation of a stripping tower include (liquid level, load), (scaling), and (temperature). 28. Currently, the main stripping processes include (ammonia stripping), (CO2 stripping), and (ACES process). 29. The current main production processes for urea include (full circulation of aqueous solution), (ammonia stripping), (CO2 stripping), and (other processes). 30. The factors affecting the formation of biuret include (temperature), (vacuum level in stages 1 and 2), (liquid level), (load), and (the steam pressure used for insulation in the jacket of the granulation tower).
26. Ideal displacement type, ideal mixed type, transitional type 27. Temperature, liquid-to-gas ratio, residence time 28. CO2 stripping process, NH3 stripping process, shift gas stripping process 29. Complete water solution circulation method, CO2 stripping method, NH3 stripping method, modified C method 30. Ammonia concentration, temperature, residence time, evaporation rate, influence of acidic and alkaline substances
26. Based on the flow pattern of the liquid phase within the synthesis tower, it can be classified into three types: (ideal displacement type), (ideal mixing type), and (transitional type). 27. The factors that affect the operation of a stripping tower are (temperature), (liquid-to-gas ratio), and (residence time). 28. Currently, the main stripping processes include (CO2 stripping process), (NH3 stripping process), and (shift gas stripping process). 29. The current main production methods for urea include the (full-circulation aqueous solution method), (CO2 stripping method), (NH3 stripping method), (modified C method), and others. 30. The factors that affect the formation of biuret include (ammonia concentration), (temperature), (residence time), (evaporation rate), and (the influence of acidic and alkaline substances). 1# Heart Juice
26. Based on the flow pattern of the liquid phase within the synthesis tower, it can be classified into three types: (ideal displacement type), (ideal mixing type), and (transitional type). 27. The factors that affect the operation of a stripping tower are (temperature), (liquid-to-gas ratio), and (residence time). 28. Currently, the main stripping processes include (CO2 stripping process), (NH3 stripping process), and (shift gas stripping process). 29. The current main production methods for urea include the (full-circulation aqueous solution method), (CO2 stripping method), (NH3 stripping method), (modified C method), and others. 30. The factors that affect the formation of biuret include (ammonia concentration), (temperature), (residence time), (evaporation rate), and (the influence of acidic and alkaline substances).
26. Ideal displacement type, ideal mixing type, transitional type 27. Temperature, liquid-to-gas ratio, residence time 28. CO2 stripping process, NH3 stripping process, shift gas stripping process 29. Complete circulation stripping method for aqueous solutions, NH3 stripping method, modified C method 30. Ammonia concentration, temperature, residence time, evaporation rate, influence of acidic and alkaline substances
26. Based on the flow pattern of the liquid phase within the synthesis tower, it can be classified into three types: (ideal displacement type), (ideal mixing type), and (transitional type). 27. The factors that affect the operation of a stripping tower are (temperature), (liquid-to-gas ratio), and (residence time). 28. Currently, the main stripping processes include (CO2 stripping process), (NH3 stripping process), and (shift gas stripping process). 29. The current main production methods for urea include the (full-circulation aqueous solution method), (CO2 stripping method), (NH3 stripping method), (modified C method), and others. 30. The factors that affect the formation of biuret include (ammonia concentration), (temperature), (residence time), (evaporation rate), and (the influence of acidic and alkaline substances). 1# Heart Juice