What could be the reasons for an increase in the pressure difference across the absorption tower in low-temperature methanol washing?
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What could be the reasons for an increase in the pressure difference across the absorption tower in low-temperature methanol washing? Everyone is welcome to come and discuss it
The temperature of the gasified raw gas increases; methanol is dirty, which causes the filters to get clogged. The circulation volume increases, and the regeneration efficiency of methanol is poor. The absorbent gas is already present before absorption occurs. The tray plates get clogged, leading to tilting and leakage issues, among others
1. Excessively high flow rate of lean methanol 2. Too low temperature of lean methanol 3. Insufficient gas flow rate 4. Excessively high flow rate at the bottom of the tower 5. Blockage in the inter-stage coolers 6. Blockage in the overhead demister 7. High water content in methanol 8. Incorrect instrument readings 9. High flow rates of gas and liquid, resulting in flooding of the tower
Excessively high flow rate of the transformed gas, severe blockage or scaling of the tray plates, false alarms from the pressure difference instruments
1 Load too high! 2 Equipment clogging 3 Tray deformation 4 Methanol being too dirty 5 Excessive water content
I wonder if, when analyzing the reasons, everyone can also consider how the judgments were made? For example: methanol is too dirty, the trays get clogged, there is tilting and leakage; the flow rates of gas and liquid are high, resulting in overflow of the tower. Only the causes are discussed without any explanation of the methods for making judgments, which seems a bit…----
What the Hyatt guest upstairs said makes sense. Since there’s a problem, should everyone share the reasons for the issues they encountered? For example, tray deformation: is it due to defective tray manufacturing? Was the original design of the tray not meeting the requirements for operational flexibility? What causes the high gas and liquid flow rates? Is it due to an increased production load?
Main reason: Speaking of system analysis, first we consider the condition of the solution within the system – for example, whether it is dirty or not – and what type of transformation is used, whether it is a full transformation or a partial one; partial transformations involve a large amount of gray value. Then check the installation condition of the trays, as well as the extent to which the pressure difference changes under varying operating conditions, in order to determine whether there is a problem with the tower’s load design. Check whether the change in pressure difference occurs after the machine is stopped and restarted, or during normal operation, in order to determine whether vibration of the tray has caused it to come loose.
Hey there upstairs, have you ever seen any clogging issues with the trays?