Key inspection areas of the reverse and regeneration system during catalyst unit maintenance
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Dear fellow users of catalytic units, please share the key areas that need to be inspected in the regenerative system during the maintenance of catalytic units, as well as the inspection standards. For example, how is the installation angle of the flap valve measured, and so on
Inspection inside the settler: 1. Coking removal from the settler – the manhole at the bottom of the settler is opened, and workshop operators carry out coking removal. 2. Inspection of the stripping section – inspection of the stripping steam pipelines, the umbrella cap in the stripping section, and tests for continuity of the raw catalyst lift pipe. 3. Inspection and coking removal of the gas collection chamber – the manhole of the gas collection chamber is opened, and the chamber is cleaned. 4. Tests on the angle and sealing performance of the flap valves – a checklist for the inspection of these valves is attached. 5. Tests for continuity of the material legs – these tests are conducted after the gas collection chamber has been thoroughly cleaned. 6. Inspection of the liner and internal components of the settler. Regenerator: 1. Opening of the manholes at the top and bottom of the regenerator. 2. Cleaning of the catalyst in the regenerator’s distribution pipes, along with inspection of those pipes. 3. Inspection inside the sleeve – the manhole of the sleeve is opened, its interior is cleaned, the alignment and sealing performance of the flap valves are checked, and tests for continuity of the raw catalyst lift pipe are performed. 4. Wing valve angle and sealing performance; a table detailing the inspection of wing valves is attached. 5. Material leg penetration test: The manhole in the flue gas collection duct is opened to conduct this test. 6. Regenerator lining and interior, as well as the oil and gas lines in the lift pipe: 1. Inspect by removing the feed oil nozzle. 2. Inspect by removing the slurry nozzle. 3. Interior of the lift pipe: Open the manhole on the feed oil nozzle to check for coking in the lift pipe. 4. Open the bottom head of the lift pipe to inspect the pre-lift steam and the fluidization steam at the bottom of the lift pipe. 5. Regeneration slide valve and regeneration inclined tube. 6. Oil and gas pipelines entering the fractional distillation section: Inspect the pipelines in this section, remove coke, and clear oil and gas before they enter the fractional distillation tower. Flue gas pipelines of the three-spin separator: 1. Inspect the interior of the three-spin separator: Open the upper and lower manholes to clean the interior. 2. Flue gas pipelines at the inlet of the flue gas turbine: Open the manhole at the inlet to clean it. 3. Inspect the critical nozzle. 4. Replace the expansion joint in the pipeline at the inlet of the flue gas turbine. 5. Inspect the interior of furnace 101
One more thing: 1. For rapid coarse spinning, it is necessary to check whether there is carbonization on the outer wall of the lift pipe； 2. For the regenerator, check the combustion oil nozzle; 3. For the triple spinner, check the feeding port
The angle of the flap valve is generally 7 degrees; you can make a tool to measure the side lengths and then calculate it
Where can I find the wing valve inspection form?
We all use protractors for measurements
The riser also needs to have its lining wear checked, as well as any loose areas that cause blockages to be addressed
There is also the inspection of the supports and struts of the centrifuge, as well as the wear and deformation of the protective tubes for various measuring instruments. The wear and presence of cracks in the ceramic nozzles on the main air distribution pipes are also checked. In short, all internal components are inspected in accordance with standards.