Q&A on Purification Technology Version [051]
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Excess water content in the desulfurization lean liquid can be caused by various factors. How can we address this issue and get the water content back within the specified limits? Has the moisture content returned to the target level? Answer: Reasons: ① Excessive reflux flow at the top of the regeneration tower; ② Too low heat load on the regenerator; ③ Too low temperature of the solution in the regeneration tower; ④ Too low pressure at the top of the regeneration tower; ⑤ Too high temperature of the process gas at the inlet of the desulfurization tower. Coal chemical processing – Purification technology section, 2017: “My technical improvements” in coal chemistry (generous rewards available). http://bbs.hcbbs.com/thread-1786290-1-1.html Registration for chemical engineers – Experience-sharing event titled “Learning from others’ experiences”. http://bbs.hcbbs.com/thread-1808158-1-1.html
Reason/Solution: ① The flow rate of water returning to the top of the regeneration tower is too high; reduce this return flow rate； ②The heat load of the variable cooker is too low; increase the heat load of the variable cooker ； ③The solution temperature in the regeneration tower is too low; increase the temperature of the solution at the bottom of the regeneration tower ； ④The pressure at the top of the regeneration tower is too low; reduce the pressure in the regeneration tower accordingly ； ⑤The temperature of the process gas at the inlet of the desulfurization tower is too high; reduce the temperature of the process gas at the inlet of the desulfurization tower.
Reason Solution ① Excessive flow rate of water returning to the top of the regeneration tower: Reduce the flow rate of water returning to the tower. ② Too low heat load on the regenerator: Increase the heat load on the regenerator. ③ Too low temperature of the solution in the regeneration tower: Raise the temperature of the solution at the bottom of the regeneration tower. ④ Too low pressure at the top of the regeneration tower: Slightly reduce the pressure in the regeneration tower. ⑤ Too high temperature of the process gas at the inlet of the desulfurization tower: Lower the temperature of the process gas at the inlet of the desulfurization tower
①① The flow rate of the liquid returning from the regeneration tower is too high; reduce this flow rate. ② The thermal load on the regenerating unit is too low; increase its thermal load. ③ The temperature of the solution in the regeneration tower is too low; raise the temperature of the solution at the bottom of the regeneration tower. ④ The pressure at the top of the regeneration tower is too low; appropriately reduce the pressure in that area. ⑤ The temperature of the process gas entering the desulfurization tower is too high; lower the temperature of the process gas at the inlet of the desulfurization tower
Answer: Cause, Solution ① Excessive flow rate of water returning to the top of the regeneration tower – Reduce the flow rate of water returning to that area. ② Too low heat load on the regenerator – Increase the heat load on the regenerator. ③ Too low temperature of the solution in the regeneration tower – Raise the temperature of the solution at the bottom of the regeneration tower. ④ Too low pressure at the top of the regeneration tower – Slightly reduce the pressure in the regeneration tower. ⑤ Too high temperature of the process gas at the inlet of the desulfurization tower – Lower the temperature of the process gas at the inlet of the desulfurization tower
Reasons and solutions: ① The flow rate of water returning to the top of the regeneration tower is too high; reduce this flow rate. ② The thermal load on the regenerator is too low; increase its thermal load. ③ The temperature of the solution at the bottom of the regeneration tower is too low; raise the temperature of that solution. ④ The pressure at the top of the regeneration tower is too low; appropriately lower this pressure. ⑤ The temperature of the process gas entering the desulfurization tower is too high; reduce the temperature of that gas
①① The flow rate of the liquid returning from the regeneration tower is too high; reduce this flow rate. ② The thermal load on the regenerating unit is too low; increase its thermal load. ③ The temperature of the solution in the regeneration tower is too low; raise the temperature of the solution at the bottom of the regeneration tower. ④ The pressure at the top of the regeneration tower is too low; appropriately reduce the pressure in that area. ⑤ The temperature of the process gas entering the desulfurization tower is too high; lower the temperature of the process gas at the inlet of the desulfurization tower
①① The flow rate of the liquid returning from the regeneration tower is too high; reduce this flow rate. ② The thermal load on the regenerating unit is too low; increase its thermal load. ③ The temperature of the solution in the regeneration tower is too low; raise the temperature of the solution at the bottom of the regeneration tower. ④ The pressure at the top of the regeneration tower is too low; appropriately reduce the pressure in that area. ⑤ The temperature of the process gas entering the desulfurization tower is too high; lower the temperature of the process gas at the inlet of the desulfurization tower
①Excessive flow rate of liquid returning from the regeneration tower. ② Too low heat load on the regenerator. ③ Too low temperature of the solution in the regeneration tower. ④ Too low pressure at the top of the regeneration tower. ⑤ Too high temperature of the process gas at the inlet of the desulfurization tower
①① The flow rate of the liquid returning from the regeneration tower is too high; reduce this flow rate. ② The thermal load on the regenerating unit is too low; increase its thermal load. ③ The temperature of the solution in the regeneration tower is too low; raise the temperature of the solution at the bottom of the regeneration tower. ④ The pressure at the top of the regeneration tower is too low; appropriately reduce the pressure in that area. ⑤ The temperature of the process gas entering the desulfurization tower is too high; lower the temperature of the process gas at the inlet of the desulfurization tower
①① The flow rate of the liquid returning from the regeneration tower is too high; reduce this flow rate. ② The thermal load on the regenerating unit is too low; increase its thermal load. ③ The temperature of the solution in the regeneration tower is too low; raise the temperature of the solution at the bottom of the regeneration tower. ④ The pressure at the top of the regeneration tower is too low; appropriately reduce the pressure in that area. ⑤ The temperature of the process gas entering the desulfurization tower is too high; lower the temperature of the process gas at the inlet of the desulfurization tower