FAQs on Tower Basics 12—What are the key items to check during the shutdown inspection of tower equipment?

This post was last edited by 3968668 on 2011-3-24 at 18:47 (1). Check the level of the trays and the supports, as well as any signs of corrosion or loosening in the connections; if necessary, remove them from the tower for cleaning or replacement. (2) Inspect the tower for corrosion, deformation, and the condition of welds in various areas; measure the thickness of the tower walls, heads, the cylinder at the feed inlet, the inlet and outlet nozzles, pressure outlet lines, level gauge wires, etc., to assess the degree of corrosion. (3) Thoroughly inspect the attachments of the equipment, as well as safety valves, pressure gauges, thermometers, level gauges, and other connections, to ensure there are no blockages, that they function at the specified pressures, and that the safety valves, pressure gauges, etc. have been calibrated. (4) If abnormal vibrations or similar phenomena are detected during operation, it is necessary to stop the machine for inspection in order to identify the cause and take appropriate action. For example, a special situation occurred in the coking contact cooling tower where the skirt bolt became loose. (5) For towers with relatively dirty media, such as coking fractionation towers, it is also necessary to check whether the floating valves on the trays are flexible, as well as the degree of coking in the oil collection tank and the extraction lines at the bottom of the tower. (6) For the coke tower, in addition to checking for deformation of the tower equipment and expansion of cracks in the skirt, as well as corrosion of the tower walls, it is also necessary to inspect for coke accumulation on the inner wall of the tower; if such accumulation is severe, it must be removed.

The last edit to this post was made by 3968668 on 2011-3-24 at 18:47. 1. Check the levelness of the trays, as well as for any corrosion or looseness in the supports and connectors; if necessary, remove them from the tower for cleaning or replacement. 2. Inspect the tower for corrosion and deformation, as well as the condition of welds in various areas. Measure the thickness of the tower walls, heads, the cylinder at the feed inlet, the inlet and outlet connections, the pressure outlet lines, and the level gauge leads, in order to assess the degree of corrosion. 3. Thoroughly inspect the attachments of the equipment, as well as safety valves, pressure gauges, thermometers, level gauges, and other connections, to ensure there are no blockages; verify that they operate at the specified pressures; and check whether their safety valves, pressure gauges, etc. have been calibrated. 4. If abnormal vibration is detected during operation, it is necessary to stop the machine for inspection in order to identify the cause and take appropriate action. For example, a special situation occurred in the coking contact cooling tower where the skirt bolt became loose. 5. For towers with relatively dirty media, such as coking fractionation towers, it is also necessary to check whether the floating valves on the tray are flexible, as well as the degree of coking in the oil collection tank and the extraction lines at the bottom of the tower. 6. For the coke tower, in addition to checking for deformation of the tower equipment and expansion of cracks in the skirt, as well as corrosion of the tower walls, it is also necessary to inspect for coke accumulation on the inner wall of the tower; if such accumulation is severe, it must be removed.

For plate towers: it is necessary to check whether the trays are loose, whether the downcomers are blocked, and whether the heat exchange tubes are blocked or damaged and worn through； For packed towers: it is necessary to check whether the packing is corroded or damaged, whether the liquid collector and liquid redistributor are clogged, and whether the packing supports are loose ； It is necessary to jointly check whether the various related control valves, safety valves, and the steam traps supplied by the heat source are blocked

This post was last edited by 3968668 on 2011-3-24 at 18:47. 1. Check the levelness of the tray, as well as any signs of corrosion or looseness in the supporting elements and connectors; if necessary, remove them from the tower for cleaning or replacement. 2. Inspect the tower for corrosion and deformation, as well as the condition of welds in various areas. Measure the thickness of the tower walls, heads, the cylinder at the feed inlet, the inlet and outlet connections, pressure leads, level gauge leads, etc., to assess the degree of corrosion. 3. Thoroughly inspect the equipment’s accessories, safety valves, pressure gauges, thermometers, level gauges, and other connections for any blockages, verify whether they operate at the specified pressures, and check whether their safety valves, pressure gauges, etc. have been calibrated. 4. If abnormal vibration is detected during operation, it is necessary to stop the machine for inspection in order to identify the cause and take appropriate action. 5. For towers with dirty media, such as coking fractionation towers, it is also necessary to check whether the floating valves on the tray are flexible, as well as the degree of coking in the oil collection tank and the extraction lines at the bottom of the tower. 6. For the coke tower, in addition to checking for deformation of the tower equipment and expansion of cracks in the skirt, as well as corrosion of the tower walls, it is also necessary to examine the accumulation of coke on the inner wall of the tower; if this accumulation is severe, it must be removed completely.

This post was last edited by 3968668 on 2011-3-24 at 18:48. The hidden feature is not available yet!! 1. Check the levelness of the trays, as well as any signs of corrosion or looseness in the connectors and supports; if necessary, remove them from the tower for cleaning or replacement. 2. Inspect the tower for corrosion and deformation, as well as the condition of the welds in various areas. Measure the thickness of the tower walls, heads, the cylinder at the feed inlet, the inlet and outlet nozzles, the pressure outlet lines, and the level gauge wires, in order to assess the degree of corrosion. 3. Thoroughly inspect the attachments of the equipment, as well as safety valves, pressure gauges, thermometers, level gauges, and other connections, to ensure there are no blockages; verify that they operate at the specified pressures; and check whether the pressure gauges and safety valves have been calibrated. 4. If any abnormalities are detected during operation, it is essential to stop the machine for inspection in order to identify the cause and take appropriate action. 5. For towers with dirty media, it is also necessary to check whether the floating valves on the tray are flexible, etc. 6. For the coke tower, it is also necessary to check for coke accumulation on the inner wall; if this accumulation is severe, it must be removed.

This post was last edited by 3968668 on 2011-3-24 at 18:48. It’s impossible to hide this information. When parking, pay close attention to the equipment in the tower: 1. Check the levelness of the tray, as well as any signs of corrosion or loosening in the supports and connectors; if necessary, remove them from the tower for cleaning or replacement. 2. Inspect the tower for corrosion and deformation, as well as the condition of welds in various areas. Measure the thickness of the tower walls, heads, the cylinder at the feed inlet, the inlet and outlet nozzles, the pressure outlet lines, and the level gauge wires, in order to assess the degree of corrosion. 3. Thoroughly inspect the equipment accessories, safety valves, pressure gauges, thermometers, level gauges, and other connections for any blockages, verify whether they operate at the specified pressures, and check whether their safety valves, pressure gauges, etc. have been calibrated. 4. If abnormal vibration is detected during operation, stop the machine for inspection to determine the cause. 5. It is also necessary to check the flexibility of the floating valve, etc.

The last edit to this post was made by 3968668 on 2011-3-24 at 18:48. For plate towers: it is necessary to check whether the tray plates are loose, whether the downcomers are blocked, and whether the heat exchange tubes are blocked or damaged/eroded； For packed towers: it is necessary to check whether the packing is corroded or damaged, whether the liquid collector and liquid redistributor are clogged, and whether the packing supports are loose ； It is necessary to jointly check whether the various related control valves, safety valves, and the steam traps supplied by the heat source are blocked

Last edited by 3968668 on 2011-3-24 18:49: Check if the reboiler is clogged, deal with fouling in the reboiler, and inspect the entire tower for leaks

This post was last edited by 3968668 on 2011-3-24 18:49. Reply 1# **Corrosion and dirt on the Ple tower

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