How to Retrofit a Tower with Repeated Ceramic Packing Breakage

Ceramic random packing can provide excellent chemical and thermal resistance.

However, repeated breakage can reduce bed quality, increase pressure drop, and create maintenance problems.

If large quantities of broken pieces are found at every shutdown, simply installing new ceramic packing may repeat the same failure cycle.

The cause of breakage should be identified before the next loading.

Determine Where Breakage Occurs

The location of fragments provides useful clues.

Breakage may be concentrated:

• near the top of the bed;
• near the support grid;
• around manways;
• throughout the entire bed.

Different patterns suggest different causes.

Check the Loading Method

Ceramic packing is brittle.

Excessive drop height during installation can cause immediate cracking and chipping.

Damage may not become obvious until later operation.

A retrofit should include controlled loading practices that minimize impact.

Inspect the Support Grid

If the support surface is uneven or has large openings, ceramic pieces may experience concentrated loads.

Check:

• support flatness;
• opening size;
• broken bars;
• deformation;
• localized point loading.

Fragments accumulating in support openings can also reduce gas flow.

Check Bed Depth

Very deep ceramic beds create large static loads.

The lower packing carries the weight of the entire bed above.

If bed depth is excessive for the particular packing geometry, lower layers may experience higher mechanical stress.

Segmenting the bed may be worth evaluating.

Review Thermal Cycling

Ceramic materials tolerate high temperature but can still be vulnerable to severe thermal shock.

Rapid changes caused by:

• hot startup;
• cold wash;
• steam;
• sudden quench;

may contribute to breakage.

Operating procedures should therefore be included in the investigation.

Check for Process Vibration or Mechanical Impact

Abnormal vibration, gas surges, or maintenance activity can damage brittle packing.

Repeated high-energy disturbances may indicate that the problem is not the ceramic quality itself.

Examine Hold-Down Arrangements

A poorly designed retaining grid can allow packing movement.

If ceramic pieces repeatedly shift during gas surges, collisions may increase breakage.

The bed limiter should control movement without compressing the bed unnecessarily.

Evaluate Whether Ceramic Remains the Best Material

If breakage continues despite correct installation and support, another packing material may be worth evaluating.

The alternative must still satisfy:

• chemical resistance;
• temperature;
• hydraulic performance;
• mechanical requirements.

Changing material is a process decision, not merely a durability decision.

Remove Broken Fragments Completely

Ceramic fragments can accumulate near the lower part of the bed.

This reduces void fraction and may increase pressure drop.

During retrofit, the support region should be cleaned thoroughly.

Simply adding new packing above accumulated fragments can worsen hydraulic resistance.

Track Breakage After Startup

Record:

• new packing quantity;
• installed bed height;
• loading method;
• support condition.

At the next shutdown, the condition can then be compared with a known baseline.

Solve the Mechanical Cause

Repeated ceramic breakage should not be treated as normal consumption.

Correct installation, suitable support geometry, reasonable bed depth, controlled thermal operation, and adequate restraint can significantly improve service life.