Q&A on Purification Technology Version [044]
Thread Content
What is the effect of gas-liquid ratio on absorption? Under certain absorption temperature, pressure, and regeneration conditions, the purity of carbon dioxide increases as the gas-liquid ratio decreases (that is, with a constant gas flow rate, a larger solution circulation volume results in a lower carbon dioxide content in the gas exiting the absorption tower). However, a larger solution circulation volume leads to higher power consumption and greater H2 losses; therefore, a high gas-liquid ratio should be adopted as much as possible while ensuring the system’s purity. Coalification Region Purification Technology Edition – 2017 Coal Chemical Industry “My Technical Upgrades” Contest (Generous Prizes Available) http://bbs.hcbbs.com/thread-1786290-1-1.html Registration for Chemical Engineers – Experience Sharing Event “Learning from Others’ Experiences” http://bbs.hcbbs.com/thread-1808158-1-1.html
Under certain absorption temperature and pressure conditions as well as regeneration conditions, the purity of carbon dioxide increases as the gas-liquid ratio in absorption decreases
Under certain absorption temperature, pressure, and regeneration conditions, the purity of carbon dioxide increases as the gas-liquid ratio decreases (that is, with a constant gas flow rate, a larger solution circulation volume results in a lower carbon dioxide content in the gas exiting the absorption tower). However, a larger solution circulation volume leads to higher power consumption and greater H2 losses; therefore, a high gas-liquid ratio should be adopted as much as possible while ensuring the system’s purity.
The liquid-to-gas ratio determines the absorption surface required for the absorption of SO2 gas; with other parameters remaining constant, increasing the liquid-to-gas ratio is equivalent to raising the spraying density inside the absorption tower, thereby increasing the contact area between the liquid and gas and enhancing the desulfurization efficiency. However, increasing the liquid-to-gas ratio will raise the flow rate of the circulation pump, resulting in higher capital and operating costs for the equipment.
Under certain absorption temperature, pressure, and regeneration conditions, the purity of carbon dioxide increases as the gas-liquid ratio decreases (that is, with a constant gas flow rate, a larger solution circulation volume results in a lower carbon dioxide content in the gas exiting the absorption tower). However, a larger solution circulation volume leads to higher power consumption and greater H2 losses; therefore, a high gas-liquid ratio should be adopted as much as possible while ensuring the system’s purity.
Under certain absorption temperature, pressure, and regeneration conditions, the purity of carbon dioxide increases as the gas-liquid ratio decreases (that is, with a constant gas flow rate, a larger solution circulation volume results in a lower carbon dioxide content in the gas exiting the absorption tower). However, a larger solution circulation volume leads to higher power consumption and greater H2 losses; therefore, a high gas-liquid ratio should be adopted as much as possible while ensuring the system’s purity.
Answer: Under certain absorption temperature, pressure, and regeneration conditions, the purity of carbon dioxide increases as the gas-liquid ratio decreases (that is, with a constant gas flow rate, a larger solution circulation volume results in a lower carbon dioxide content in the gas exiting the absorption tower). However, a larger solution circulation volume leads to higher power consumption and greater losses of H2; therefore, while ensuring the system’s purity, it is advisable to use the largest possible gas-liquid ratio
If the vapor-liquid ratio is too high, absorption is incomplete; if it is too low, energy is wasted
Under certain absorption temperature, pressure, and regeneration conditions, the purity of carbon dioxide increases as the gas-liquid ratio decreases (that is, with a constant gas flow rate, a larger solution circulation volume results in a lower carbon dioxide content in the gas exiting the absorption tower). However, a larger solution circulation volume leads to higher power consumption and greater H2 losses; therefore, a high gas-liquid ratio should be adopted as much as possible while ensuring the system’s purity.
In addition to affecting the absorption driving force, the gas-liquid ratio also influences the liquid holdup in the absorption equipment.
Under certain absorption temperature, pressure, and regeneration conditions, the purity of carbon dioxide increases as the gas-liquid ratio in absorption decreases (that is, with a constant gas flow rate, a larger solution circulation volume results in a lower carbon dioxide content in the gas exiting the absorption tower); however, a larger solution circulation volume leads to higher power consumption and greater H2 losses