Figure 1: 250Y Ceramic Packing showing corrugated sheet structure.

In the production of sulfuric acid or non-ferrous metal smelting, the drying tower handles the most aggressive condition: concentrated H₂SO₄ (93-98%). Metal packings corrode rapidly, while plastic packings cannot withstand the exothermic heat of absorption.

Ceramic Structured Packing is the industry benchmark for this service. This guide explains how to select the right ceramic grade and avoid the operational traps that lead to tower flooding or packing collapse.

Ceramic Material Comparison

Trap 1: The "Dry Tower" Startup

Never introduce hot gas into a tower filled with cold ceramic packing without acid circulation. The rapid temperature rise causes thermal shock, shattering the ceramic. Always pre-wet the bed with circulating acid before introducing process gas.

Trap 2: Expansion Clearance

Ceramics expand when heated. If the packing is stacked tightly against the tower shell, the radial expansion will cause the ceramic blocks to crush each other. Leave a 10-20mm expansion gap filled with acid-resistant rope or ceramic wool.

Trap 3: Wetting Rate Failure

Ceramic surfaces are hydrophilic, but if the acid irrigation rate is too low, the packing surface dries out. This creates "dry spots" that lead to uneven gas flow and channeling. Ensure your L/G ratio meets the minimum wetting rate for 250Y or 350Y packing.

1. Acid Concentration: Confirm exact % of H₂SO₄ and presence of Fluorides (F⁻) which attack silica.
2. Packing Geometry: 250Y for standard drying; 350Y for limited space with high efficiency needs.
3. Support Grid: Must be acid-proof material (e.g., Graphite/PTFE lined) with adequate free area.
4. Installation: Use soft slings for lifting; do not drop packing from height.
5. Spares: Keep 3-5% extra packing tiles for future maintenance access.

Get Your Acid Tower Packing Quote

FXSINO supplies high-density ceramic structured packing specifically engineered for sulfuric acid plants. We provide technical drawing reviews to ensure your bed depth and distributor match the packing specifications.

Contact FXSINO: [[jackieqiu9202@gmail.com ]] | [[+86 18507999558]]