x'q { "@context": "https://schema.org", "@type": "Product", "name": "Structured Packing for Distillation Column - 250Y/350Y/500Y/700Y", "description": "Structured packing for distillation columns in SS304, SS316L, Duplex 2205, and Titanium. Models 250Y, 350Y, 500Y, 700Y with corrugated sheet and wire gauze designs. Low pressure drop, high HETP efficiency for vacuum and atmospheric distillation.", "brand": {"@type": "Brand", "name": "FXSINO"}, "sku": "FS-SP-DIST", "image": "/storage/uploads/images/202608/21/IMG_SP_DIST_HERO.jpg" } Figure 1: Structured packing elements (corrugated sheet metal) ready for distillation column installation. Structured Packing for Distillation: 250Y/500Y/700Y in SS304 & 316L, Low ΔP Engineering Brief: When your distillation column demands HETP below 400 mm and pressure drop under 0.2 kPa per theoretical stage, random packing hits its limit. Structured packing with corrugated sheets at 45° (Y-type) or 30° (X-type) delivers predictable mass transfer, uniform liquid distribution, and the lowest ΔP per stage of any tower internals — critical for vacuum distillation where every millibar of pressure loss costs separation efficiency. 1. What Is Structured Packing? Structured packing is a type of tower packing manufactured by arranging corrugated metal sheets, wire gauze, or perforated plates into a highly ordered, geometrically fixed structure . Unlike random packing (Pall rings, saddles), where each piece settles unpredictably, structured packing creates uniform, parallel flow channels that eliminate channeling and deliver consistent mass transfer across the entire tower cross-section . Each packing element is typically 100–300 mm in height, with corrugations running at a fixed angle to the vertical axis. Elements are stacked vertically in the column, with alternating layer orientations (usually 90° rotation between layers) to promote radial mixing of both vapor and liquid phases . Figure 2: Corrugated sheet structure with 45° Y-type angle — uniform flow channels eliminate channeling. 2. Corrugation Geometry: X-Type vs Y-Type The corrugation angle determines the trade-off between capacity and efficiency: Parameter X-Type (30°) Y-Type (45°) Corrugation Angle 30° from vertical 45° from vertical Gas Capacity Higher (less flow resistance) Moderate Mass Transfer Efficiency Moderate Higher (longer contact path) Pressure Drop Lower Moderate Best For High-throughput, low-pressure distillation High-purity separation, vacuum distillation Nomenclature: A "250Y" packing has 250 m²/m³ surface area with 45° corrugation. A "250X" uses 30° corrugation. Y-type is the industry default for distillation. 3. Technical Specifications: 250Y / 350Y / 500Y / 700Y The numeric prefix denotes specific surface area in m²/m³. Higher surface area = more mass transfer per meter but higher pressure drop and lower capacity: Model Surface Area (m²/m³) Void Fraction (%) Typical HETP (mm) ΔP (Pa/m) F-Factor Limit 250Y 250 97–98 350–500 150–250 2.8–3.2 350Y 350 95–96 300–400 200–350 2.4–2.8 500Y 500 93–94 200–300 300–500 2.0–2.4 700Y 700 90–92 150–250 500–800 1.5–2.0 Data compiled from industry standard specifications. HETP and ΔP vary with operating pressure, liquid load, and system physical properties. For wire gauze variants (e.g., 500Y-WG), HETP can be 20–30% lower. See our Metal Structured Packing 500Y/700Y deep dive for gauze-type details. 4. Material Selection for Distillation Service Distillation involves heat, pressure, and often corrosive feeds. Material selection follows the same chloride/sulfuric/temperature logic as other tower internals — see our 304 vs 316L Structured Packing guide for full corrosion thresholds: Material Max Temp Corrosion Resistance Typical Distillation Use SS304 450°C General (no chlorides) Hydrocarbon fractionation, solvents SS316L 450°C Chlorides ≤ 200 ppm Pharmaceutical, fine chemical, chlorinated solvents Duplex 2205 300°C Chlorides > 200 ppm, high strength Seawater stripping, high-stress towers Titanium (Gr2) 300°C Exceptional (chlorides, Cl2) Chlor-alkali, HCl, TiCl4 distillation Figure 3: Material selection — SS304 (bright), SS316L (matte), Duplex 2205, and Titanium for aggressive distillation. 5. Why Structured Packing for Distillation? Performance Advantages Over Random Packing Lower HETP: 150–400 mm vs. 500–800 mm for random packing — you need fewer theoretical stages for the same separation, reducing column height . Ultra-Low Pressure Drop: 0.1–0.5 kPa per theoretical stage vs. 0.5–1.5 kPa for trays — essential for vacuum distillation (e.g., edible oil deodorization at 3–5 mbar) . No Channeling: Ordered geometry forces uniform vapor-liquid contact across 100% of tower cross-section . Predictable Scale-Up: Performance data from 50 mm test columns scales directly to 5 m industrial towers — no random-packing scale-up uncertainty . High Turn-Down Ratio: Maintains efficiency down to 30–40% of design capacity, unlike trays which weep at low load. 6. Key Applications • Vacuum Distillation: Edible oil deodorization, vitamin E concentration, phthalic anhydride — where every mbar of ΔP reduces top product purity . • Atmospheric Distillation: Crude oil fractionation, solvent recovery, ethanol/water separation . • Fine Chemical & Pharmaceutical: Heat-sensitive intermediates requiring low residence time and precise temperature control . • Cryogenic Distillation: Air separation (O2/N2/Ar) where low ΔP and high efficiency are mandatory . • Absorbers & Strippers: CO2 capture, amine treating, sour water stripping (cross-over from random packing applications). Figure 4: Structured packing section installed in distillation column with liquid distributor at top. 7. Installation & Tower Internals Support Grid: Use a camel hump support grid rated for packed-bed load + hydraulic thrust. Grid opening ≤ 15 mm to retain packing elements. Leveling: Each packing element must sit level within ± 1°. Use a spirit level on the top edge of each element. Tilted packing causes maldistribution . Rotation: Alternate layers at 90° rotation. Mark each element with orientation arrows before lowering into the column. Liquid Distribution: Critical for structured packing — maldistribution compounds with each layer. Use a high-performance liquid distributor (target irrigation density ≥ 80 points/m²). Bed Limiter: Install a hold-down plate to prevent packing lift during pressure surges or vacuum operation. 8. Structured Packing vs Random Packing vs Trays Factor Structured Packing Random Packing Trays HETP 150–400 mm 500–800 mm 450–600 mm/tray ΔP per Stage 0.1–0.5 kPa 0.3–0.8 kPa 0.5–1.5 kPa Capacity (F-factor) 1.5–3.2 1.0–2.5 1.5–2.5 Turn-Down Ratio 30–40% 50% 70–80% Installation Cost High (precision required) Low (dump filling) High (tray assembly) Best For Vacuum, high-purity, low ΔP General absorption, corrosive service High-capacity, fouling service 9. Quick FAQ Q: What model should I choose for vacuum distillation at 10 mbar? A: For vacuum service below 50 mbar, 500Y or 700Y is recommended. The higher surface area compensates for low gas density, and the low ΔP per stage preserves top product purity. Wire gauze variants (500Y-WG) offer 20–30% better HETP if budget allows. Q: Can I retrofit an existing tray column with structured packing? A: Yes. Removing trays and installing structured packing typically increases capacity by 20–40% and reduces ΔP by 50–70%. You'll need to install a new support grid, liquid distributor, and bed limiter. Contact us for a retrofit feasibility assessment. Q: How do I prevent maldistribution in structured packing? A: Use a high-quality liquid distributor with ≥ 80 irrigation points per m² and uniform flow distribution (± 5%). For beds taller than 4–6 m, install collectors and redistributors at intermediate heights. Level each packing element to ± 1°. Specify Structured Packing for Your Distillation Column FXSINO manufactures corrugated sheet and wire gauze structured packing in all standard models (250Y/350Y/500Y/700Y) and materials (SS304, SS316L, Duplex 2205, Titanium, Hastelloy). Every element is laser-cut and CNC-folded for dimensional accuracy. We supply complete tower packages including support grids, liquid distributors, and bed limiters. Send us your column ID, operating pressure, and separation specs for a tailored recommendation. Contact FXSINO: jackieqiu9202@gmail.com | +86 18507999558

  { "@context": "https://schema.org", "@type": "Product", "name": "Plastic Pall Ring Packing - PP, RPP, CPVC, PVC, PVDF", "description": "Plastic Pall Ring random packing in PP, RPP, PVC, CPVC, and PVDF. Sizes 16/25/38/50/76mm for absorption towers, gas scrubbing, cooling, and wastewater treatment. High void fraction, low pressure drop, corrosion resistant.", "brand": {"@type": "Brand", "name": "FXSINO"}, "sku": "FS-PPR-PR", "image": "/storage/uploads/images/202608/21/IMG_PP_PALL_HERO.jpg" } Figure 1: Plastic Pall Rings — PP, RPP, CPVC, and PVDF variants for corrosive service absorption and scrubbing. Plastic Pall Ring Packing: PP, RPP & CPVC for Absorption & Scrubbing Engineering Brief: When your tower runs below 100°C and handles corrosive aqueous streams, metal packings are overkill — and will corrode anyway. Plastic Pall Rings in PP, RPP, CPVC, and PVDF deliver void fractions above 90%, low pressure drop, and complete corrosion immunity at a fraction of the cost. Here's the complete specification. 1. What Is a Plastic Pall Ring? The Pall Ring is the most widely used random tower packing in the world. It evolved from the Raschig ring: while retaining the cylindrical shape (height equals diameter), its wall is punched with two rows of windows, and the resulting tabs are bent inward toward the center . This simple geometric change transforms performance — the windows create internal wetting surfaces and open gas pathways that eliminate the severe channeling and high pressure drop that plague plain Raschig rings . When molded from thermoplastics (PP, RPP, PVC, CPVC, PVDF), the Pall Ring becomes a lightweight, corrosion-proof, and economical random packing suitable for absorption, scrubbing, cooling, and stripping of non-oxidizing corrosive liquids and gases . Figure 2: Punched windows and inward-bent fingers create internal wetting surfaces and open gas pathways. 2. Technical Specifications (All Sizes) The following data applies to standard PP Pall Rings. Other materials (RPP, PVC, CPVC, PVDF) share the same geometric dimensions, with bulk density varying by polymer density . Size D×H×T (mm) Surface Area (m²/m³) Void Fraction (%) Bulk Number (pcs/m³) Bulk Density (kg/m³) 16 × 16 × 1.0 299 90.0 214,000 105 25 × 25 × 1.2 219 93.4 51,900 75 38 × 38 × 1.4 146 94.5 13,800 68 50 × 50 × 1.5 109 94.9 6,500 56 76 × 76 × 2.6 71 95.1 1,830 52 Data compiled from industry standard datasheets (geometric values; bulk density shown for PP, varies by material density). Custom sizes (10/13/89/100mm) and wall thicknesses available on request. 3. Material Selection: PP vs RPP vs CPVC vs PVDF Choosing the right polymer is the single most important decision. The wrong material will warp, crack, or leach — use this table to match chemistry and temperature : Material Max Temp (continuous) Density (g/cm³) Chemical Resistance Typical Application PP (Polypropylene) 100°C 0.89–0.91 Excellent general-purpose Water treatment, general scrubbing, cooling RPP (Reinforced PP) 120°C 0.95–1.05 Higher strength, retains shape Hot alkaline scrubbing, deeper beds PVC (Polyvinyl Chloride) 60°C 1.38–1.45 Strong acids (H2SO4, HCl) Chlor-alkali, HCl absorption (low temp) CPVC (Chlorinated PVC) 90°C 1.45–1.58 Hot acids and oxidizing media Hot acid gas scrubbing, FGD PVDF (Kynar) 150°C 1.75–1.78 Superior (halogens, HF, solvents) Chlorine, HF, ultra-pure, semiconductors Figure 3: Material selection — white PP/RPP, gray PVC/CPVC, and opaque PVDF for aggressive service. 4. Why Choose Plastic Pall Rings? Core Performance Advantages Complete Corrosion Immunity: Polymers do not rust or corrode — ideal for salts, acids, alkalis, and brine where metal packings fail . Low Pressure Drop: Void fractions of 90–95% minimize gas-flow resistance, reducing fan and blower energy . High Mass Transfer Efficiency: Windows and fingers promote uniform liquid distribution, reducing HETP vs. Raschig rings . Lightweight: Bulk density of just 52–105 kg/m³ (PP) — roughly one-fifth of ceramic packings — minimizing tower support requirements . Low Cost: Injection-molded thermoplastics offer the lowest installed cost per unit of separation among all corrosion-resistant packings . 5. Primary Applications • Acid Gas Absorption: HCl, SO2, SO3, H2S, Cl2, and NOx scrubbing — the largest single application . • Flue Gas Desulfurization (FGD): Wet limestone SO2 removal in power plants and incinerators (CPVC or RPP at elevated temperature) . • Wastewater Treatment: Ammonia and VOC stripping, aeration, deodorization towers . • Cooling & Humidification: Counter-current cooling towers and gas conditioning . • Chemical Recovery: Solvent recovery, acid concentration, and brine dechlorination. Figure 4: Plastic Pall Rings (PP) installed in an acid gas scrubber for HCl and SO2 absorption. 6. Plastic vs Metal vs Ceramic Pall Rings Factor Plastic Metal (SS316L) Ceramic Max Temperature 60–150°C ~400°C ~800°C Corrosion Resistance Excellent Moderate Good (acid) Bulk Density (kg/m³) 52–105 ~400 ~700 Relative Cost Low High Medium Best For Corrosive aqueous, low–mid temp High temp, hydrocarbons High temp, strong acid 7. Installation Guidelines Support Grid: Use a camel hump support grid or perforated plate with openings ≤ 60% of ring diameter to prevent fall-through. Uniform Loading: Pour evenly across the tower cross-section; do not dump from one point. Never stand directly on the packing bed — use a spreader board . Bed Limiter: Install a hold-down plate for beds subject to high gas velocity or vacuum. See our Bed Limiter guide. Liquid Distribution: For beds taller than 3–5 m, install collectors and redistributors. See our Collector & Redistributor guide. Pre-Wetting: Always wet the bed before introducing gas to prevent dry channeling and achieve design efficiency immediately. 8. Quick FAQ Q: Which material should I choose for HCl gas absorption? A: For dilute HCl at room temperature, PP is the economical choice. For concentrated or warm HCl, use CPVC (to 90°C) or PVDF (to 150°C). PVC is also excellent but limited to 60°C. See our material selection guide for chloride thresholds. Q: Can plastic Pall Rings handle hot caustic (NaOH) service? A: PP and RPP resist caustic well up to their temperature limits (100°C and 120°C respectively). Avoid PVC and CPVC in strong alkali — they degrade. For hot concentrated NaOH above 120°C, consider metal or ceramic packings. Q: How much packing do I need for my tower? A: Quantity (pcs) = Tower Cross-Sectional Area × Bed Height × Bulk Number (from table). Example: a 2 m ID tower with 3 m bed height of 38mm PP rings: π × 1.0² × 3 × 13,800 ≈ 130,100 pcs. Contact us with your tower dimensions for a precise quote. Request Plastic Pall Rings for Your Project FXSINO supplies Plastic Pall Rings in PP, RPP, PVC, CPVC, and PVDF in all standard sizes (16/25/38/50/76mm), with optional carbon-filled PP for anti-static service. Every order ships with material certificates and dimensional inspection reports. We also supply matched support grids and liquid distributors for complete tower packages. Contact FXSINO: jackieqiu9202@gmail.com | +86 18507999558

  { "@context": "https://schema.org", "@type": "Product", "name": "Camel Hump Support Grid - Packing Support for Structured & Random Beds", "description": "Camel hump (camelback) support grid with 90-95% free area and heavy load capacity. Engineered for structured and random packing beds in distillation, absorption, and scrubbing columns. SS304/316L, carbon steel, duplex available.", "brand": {"@type": "Brand", "name": "FXSINO"}, "sku": "FS-CHSG", "image": "/storage/uploads/images/202608/21/IMG_CAMEL_HUMP_HERO.jpg" } Figure 1: Camel hump support grid — continuous arched (wave) profile stamped from steel plate. Camel Hump Support Grid: Load-Bearing Solution for Structured Packing Beds Engineering Alert: The support grid is the foundation of your packed bed. A failed support means collapsed packing, blocked gas flow, and a costly shutdown. Camel hump (camelback) grids deliver 90%+ open area with exceptional load-bearing capacity — but only when designed to your specific column loads. Here's the data you need. 1. What Is a Camel Hump Support Grid? A camel hump support grid — also called a camelback support — is fabricated from steel plates stamped into continuous arched (wave) profiles. The "humps" create a rigid structural section, while the spaces between arches provide high open area for gas and liquid passage. Unlike flat bar grids, the arched geometry turns each rib into a load-carrying beam . Each arch acts like a small bridge: the curved profile converts vertical bed load into compressive force along the arc, distributing stress evenly to the tower wall instead of concentrating it at the center . This is why a camel hump grid can carry substantially more load than a flat grid of the same plate thickness. Figure 2: Key dimensions — arch height (H), plate thickness (t), and open area ratio. 2. Design Parameters Parameter Typical Range Design Note Open Area 90 – 95% Minimizes pressure drop across the support plane . Arch Height 150 – 300 mm Higher arches carry more load but reduce available bed height . Plate Thickness 3 – 6 mm Driven by calculated bed load (see Section 3) . Module Width 300 – 500 mm Must pass through the column manway (typically DN500 or larger) . Hole Diameter 10 – 25 mm Balance liquid drainage vs. packing fallback. Applicable Tower Dia. DN300 – DN6000 Modular assembly covers small to very large columns . 3. Load-Bearing Capacity Data The load-bearing capacity depends on three variables: plate thickness, arch height, and material grade. The total bed load includes packing weight, liquid holdup, and any process-side pressure differential . Typical Load Capacity by Plate Thickness (SS316L, Arch Height 200 mm): • 3 mm plate: ~2,500 kg/m² (light-duty; suitable for 250Y beds < 3 m tall) • 4 mm plate: ~4,500 kg/m² (standard-duty; most 500Y applications) • 6 mm plate: ~8,000 kg/m² (heavy-duty; tall beds, high liquid holdup, vacuum service) Design Safety Factor: Always specify a minimum 2.5× safety factor over the calculated operating load. Temperature above 300°C requires derating — consult our engineers. Figure 3: Camel hump grid (left) delivers 90%+ open area vs. ~45% for a traditional bar grid (right). 4. Camel Hump vs. Bar Grid: Which to Choose? Factor Camel Hump Grid Bar Grid Open Area 90 – 95% 40 – 50% Pressure Drop Minimal (0.1–0.3 kPa typical) Moderate to high Liquid Redistribution Built-in (arch valleys collect & re-drip) None (requires separate collector) Load Capacity High (arch acts as beam) Moderate Fouling Risk Low (self-draining valleys) Higher (flat surfaces trap solids) 5. 4-Step Selection Method Step 1 — Calculate Bed Load: Packing bulk density × bed height × tower area + liquid holdup (typically 5-15% of packing volume). For 500Y packing, expect ~7.2 kg/m² per mm of bed height. Step 2 — Verify Manway Access: Module width must be ≤ manway ID minus 50 mm clearance. Standard DN500 manway → max module width 450 mm. Step 3 — Check Process Conditions: Temperature > 300°C requires thicker plate or upgraded alloy. Vacuum service needs smooth gas entry (hump profile minimizes entry loss). Step 4 — Match Corrosion Rating: Same alloy as your packing. See our 304 vs 316L guide for chloride thresholds. Figure 4: Installing camel hump grid modules through a DN500 manway. 6. Material Selection Corrosion & Temperature Limits SS304L: Clean organics, atmospheric temperature. Most economical choice. SS316L: Amine service, H2S, CO2, trace chlorides. The industry default for refinery service . Duplex 1.4462: Chlorides > 500 ppm, higher mechanical strength at temperature . Titanium Grade 2: Aggressive chlorides, wet Cl2, seawater stripping. 7. Installation & Common Failure Modes Failure Mode Cause Prevention Permanent Deformation Overload or high-temperature creep Apply 2.5× safety factor; derate for T > 300°C Packing Fall-Through Hole diameter too large for packing size Max hole = 60% of packing corrugation spacing Gas Bypassing Gaps between modules and shell Weld perimeter seal strips during installation Corrosion Perforation Concentrated corrosives in valleys Specify same alloy as packing; ensure drainage 8. Pairing with Liquid Distributors The camel hump grid sits at the bottom of the packed bed. Above it sits the packing, and above that sits the liquid distributor. The grid's arch valleys naturally collect liquid and act as a crude redistributor — especially valuable when paired with perforated plate structured packing, which adds lateral redistribution through perforations. For a complete overview of packing selection, see our 5-factor guide. Figure 5: Full tower internals assembly — camel hump grid at bottom, structured packing in middle, liquid distributor on top. Quick FAQ Q: Can a camel hump grid replace a separate liquid collector? A: In many cases, yes. The arch valleys collect liquid and drip it onto the bed below, providing basic redistribution. However, for tall columns (> 6 m bed height) or severe maldistribution, a dedicated liquid collector and redistributor is still recommended at intermediate levels. Q: How do I prevent packing from falling through the grid holes? A: The maximum hole diameter should not exceed 60% of the packing's corrugation spacing. For 250Y (spacing ~25 mm), holes should be ≤ 15 mm. For 500Y (spacing ~12 mm), holes should be ≤ 7 mm. We can supply mesh overlay if needed. Q: What's the maximum temperature for SS316L camel hump grids? A: SS316L retains full strength up to ~425°C. Above that, creep becomes significant — we recommend Duplex or Inconel 625 for continuous service above 450°C. Need Engineering Drawings & Load Calculations? FXSINO supplies camel hump support grids with full mechanical calculations, material mill certificates (MTC to ASTM A240), and matched tower internals. Send us your tower ID, bed height, and process conditions — we'll engineer the right solution. Contact FXSINO: jackieqiu9202@gmail.com | +86 18507999558