{ "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [{ "@type": "Question", "name": "What is the difference between Raschig Rings and Pall Rings?", "acceptedAnswer": { "@type": "Answer", "text": "Raschig Rings are simple cylindrical tubes with no internal structure, offering lower cost but higher pressure drop. Pall Rings have windows and internal fingers, providing better liquid distribution and lower pressure drop." } },{ "@type": "Question", "name": "Can ceramic Raschig Rings be used in strong acid?", "acceptedAnswer": { "@type": "Answer", "text": "Yes, ceramic (porcelain) Raschig Rings have excellent resistance to hot concentrated sulfuric acid, nitric acid, and organic solvents where plastic packing would fail." } }] } Figure 1: Standard Ceramic Raschig Rings, the workhorse of random packing. Raschig Rings: The Original Random Packing for Cost-Effective Mass Transfer Invented in 1914, the Raschig Ring remains the most economical solution for absorption, stripping, and distillation towers. While newer packings offer lower pressure drop, Raschig Rings provide unmatched chemical resistance at a fraction of the cost, especially in high-temperature ceramic applications. This guide covers how to select the right material (Ceramic, Metal, or Plastic) and avoid common pitfalls like breakage and high-pressure drop.   Part 1: Ceramic vs. Metal vs. Plastic Raschig Rings The choice of material defines the operational limits. Here is the breakdown for selecting your Raschig Rings: Raschig Ring Material Properties Material Max Temp Chemical Resistance Best Application Ceramic / Porcelain 1200°C Excellent (Acids) H2SO4 Drying Towers, High Heat Metal (SS304/316) 400°C Good (Broad) Hydrocarbon Distillation, Heat Shock Plastic (PP/PVC) 90°C Good (Bases) Water Treatment, Caustic Scrubbing Part 2: 3 Engineering Traps with Raschig Rings Trap 1: Wall Effect & High Pressure Drop Due to their simple shape, Raschig Rings have a larger "wall effect" (liquid channeling along the tower walls). To mitigate this, use multiple sizes or ensure proper liquid distributors are installed above the bed. Trap 2: Ceramic Breakage During Loading Ceramic rings are brittle. Dropping them from the top of a 10-meter tower will shatter them into dust, clogging the support plate. Use a loading chute or sock-loading technique to minimize free-fall distance. Trap 3: Incorrect Size Ratio If the ring diameter is too large relative to the tower diameter (exceeding 1/8th of the tower ID), severe channeling occurs. Always maintain a tower-to-ring diameter ratio > 8:1. Part 3: FXSINO Raschig Ring Selection Guide Size Matters: 25mm for general absorption; 50mm for high gas flow; 16mm for laboratory columns. Aspect Ratio: Standard is 1:1 (Height = Diameter). Custom ratios available for specific pressure drop requirements. Bulk Density Check: Ensure your support grid can handle the weight. Ceramic packing is extremely heavy (up to 800 kg/m³). Surface Finish: For ceramic, specify "glazed" if product sticking or fouling is a concern. Request Raschig Ring Quotation ✅ ISO 9001 Certified✅ Acid Resistance Tested✅ Bulk Stock Available FXSINO supplies millions of Raschig Rings monthly for global chemical plants. Send us your required size (16mm, 25mm, 38mm, 50mm, 76mm) and material for a competitive quote. Contact FXSINO: [[jackieqiu9202@gmail.com]] | [[18507999558]] © 2026 Jiangxi FXSINO Mass Transfer Technology Co., Ltd. All Rights Reserved.

    { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [{ "@type": "Question", "name": "What is the difference between PPH and standard PP packing?", "acceptedAnswer": { "@type": "Answer", "text": "PPH (Homopolymer) has higher heat deflection temperature (~110°C) and better chemical resistance than standard PP (Copolymer). PPH is harder and more brittle, ideal for high-temperature towers." } },{ "@type": "Question", "name": "Can PPH packing be used in food processing?", "acceptedAnswer": { "@type": "Answer", "text": "Yes, virgin PPH complies with FDA standards for food contact and is often used in pharmaceutical extraction columns due to its high purity and low extractables." } }] } Figure 1: PPH Structured Packing with high surface area for efficient mass transfer. PPH Structured Packing: The High-Temperature Alternative to PVC & RPP When your process temperature exceeds 80°C, standard Polypropylene (PP) begins to soften and deform. PVC becomes brittle. For applications like high-temperature scrubbing, pharmaceutical extraction, or chlorine service, PPH (Polypropylene Homopolymer) is the optimal balance of chemical resistance and thermal stability. This guide explains how to leverage PPH Structured Packing to prevent tower flooding and maintain separation efficiency in aggressive thermal environments.   Part 1: PPH vs. PP vs. PVC: Material Showdown Choosing the right polymer is critical. Here is how PPH stacks up against common alternatives in tower packing: Polymer Property Comparison Material Max Continuous Temp Tensile Strength Best Application PPH (Homopolymer) 100-110°C High Hot Acid Scrubbing, Chlorine RPP (Random PP) 80-90°C Medium Ambient Temp Absorption PVC 60°C High Cold Water/Chlorination Part 2: 3 Engineering Traps with PPH Packing Trap 1: Creep Deformation Under Load PPH is stiffer than PE but can undergo "creep" (slow deformation) under constant mechanical load at high temperatures. Never stack PPH beds higher than 6 meters without intermediate supports or using thicker gauge sheets. Trap 2: Thermal Expansion Coefficient Plastics expand significantly more than steel. For every 10°C rise, PPH expands ~1.5mm per meter. If the packing is fixed rigidly at the top, it will buckle. Design for free vertical expansion. Trap 3: Oxidizer Sensitivity While PPH resists acids well, it is susceptible to strong oxidizers (e.g., Chlorine, Bromine, Permanganate). These chemicals attack the polymer chain, leading to embrittlement. Verify oxidizer concentration before specifying PPH. Part 3: FXSINO PPH Selection Checklist Beta Ratio: Select 250Y for high efficiency (e.g., distillation) or 500X for high capacity (e.g., cooling towers). Sheet Thickness: For towers > 4m tall, request 0.8mm or 1.0mm thickness to prevent buckling. UV Protection: If the tower is outdoors, insist on carbon black or UV stabilizers. Support Grid: Ensure the grid has >90% free area to prevent backup of liquids. Virgin Resin: Specify "No Regrind" to ensure consistent melting points and mechanical strength. Request PPH Structured Packing Quotation ✅ FDA Grade Virgin Resin✅ CNC Laser Cutting✅ 3rd Party Test Reports FXSINO manufactures high-precision PPH Structured Packing tailored to your tower diameter. Send us your process data for a free hydraulic calculation and quotation within 24 hours. Contact FXSINO: [[jackieqiu9202@gmail.com]] | [[18507999558]] © 2026 Jiangxi FXSINO Mass Transfer Technology Co., Ltd. All Rights Reserved.

  { "@context": "https://schema.org", "@type": "Article", "headline": "Ceramic Structured Packing for Sulfuric Acid Drying Towers", "description": "Technical guide for selecting Ceramic Structured Packing (250Y/350Y) in 98% Sulfuric Acid drying towers.", "image": "https://www.fxsino.com/storage/uploads/images/202606/05/ceramic-in-acid-tower.jpg", "author": { "@type": "Organization", "name": "FXSINO Mass Transfer Technology" }, "publisher": { "@type": "Organization", "name": "FXSINO", "logo": { "@type": "ImageObject", "url": "https://www.fxsino.com/logo.png" } }, "mainEntityOfPage": { "@type": "WebPage", "@id": "https://www.fxsino.com/guides/ceramic-packing-sulfuric-acid-tower" } } Figure 1: 250Y Ceramic Packing showing corrugated sheet structure. Ceramic Structured Packing for Sulfuric Acid Drying Towers 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.   Part 1: Material Selection for Acid Service Not all ceramics are created equal. For sulfuric acid towers, the choice usually comes down to these two types: Ceramic Material Comparison Material Type Acid Resistance Thermal Shock Application Chemical Porcelain Excellent (<98% H₂SO₄) Moderate Standard Drying Towers Alumina Ceramic Superior (Fuming Acid) High High Temp / Oleum Service Part 2: 3 Hidden Traps in Sulfuric Acid Towers 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. Part 3: FXSINO Technical Checklist for Acid Towers Acid Concentration: Confirm exact % of H₂SO₄ and presence of Fluorides (F⁻) which attack silica. Packing Geometry: 250Y for standard drying; 350Y for limited space with high efficiency needs. Support Grid: Must be acid-proof material (e.g., Graphite/PTFE lined) with adequate free area. Installation: Use soft slings for lifting; do not drop packing from height. Spares: Keep 3-5% extra packing tiles for future maintenance access. Get Your Acid Tower Packing Quote ✅ ISO 9001 Certified✅ 50 m³ Daily Capacity✅ SGS/BV Inspection 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]] © 2026 Jiangxi FXSINO Mass Transfer Technology Co., Ltd. All Rights Reserved.