INDUSTRY COMPONENT

Support Grid/Frame

Structural framework supporting catalyst gauze in chemical reactors for ammonia oxidation and nitric acid production.

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Component Specifications

Definition
A rigid metallic grid or frame assembly designed to hold multiple layers of platinum-rhodium catalyst gauze in fixed position within high-temperature reactors. It maintains proper spacing, alignment, and tension of gauze layers while withstanding thermal expansion, mechanical stresses, and corrosive gas environments during ammonia oxidation processes at 800-950°C.
Working Principle
Provides mechanical support and uniform gas distribution by maintaining precise geometric arrangement of catalyst gauze layers. The grid structure allows thermal expansion while preventing gauze sagging or contact, ensuring optimal catalytic surface exposure and reaction efficiency.
Materials
High-temperature nickel-chromium alloys (e.g., Inconel 600/601, RA330) or stainless steel (310S) with oxidation resistance. Wire diameter: 3-6mm. Surface finish: pickled and passivated.
Technical Parameters
  • Mesh Size 20-40 mm
  • Grid Pattern Square or hexagonal mesh
  • Load Capacity 50-200 kg/m²
  • Wire Diameter 4mm typical
  • Pressure Rating 5-10 bar
  • Frame Dimensions Custom to reactor diameter (1-5m)
  • Operating Temperature 800-950°C
  • Thermal Expansion Allowance ±15mm
Standards
ISO 5755, DIN 17175, ASTM B166

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Support Grid/Frame.

catalyst support grid gauze frame ammonia oxidation reactor nitric acid catalyst high-temperature alloy frame platinum gauze support chemical reactor internals Support Grid/Frame Support Grid/Frame in Chemical Manufacturing

Parent Products

This component is used in the following industrial products

Catalyst Gauze Pack

A structured assembly of catalyst-coated gauze layers used to facilitate the oxidation of ammonia to nitric oxide in industrial reactors.

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Demister

A device used to remove entrained liquid droplets from a gas or vapor stream.

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Porous Element / Diffuser

A porous component within a sparger system that disperses gases into liquids through fine pores to create uniform bubbles.

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Engineering Analysis

Risks & Mitigation
  • Thermal fatigue cracking
  • High-temperature oxidation
  • Mechanical deformation from gauze tension
  • Corrosion from nitric acid condensation
FMEA Triads
Trigger: Thermal cycling during startup/shutdown
Failure: Grid warping or cracking
Mitigation: Use alloys with matched thermal expansion coefficients; implement controlled heating/cooling cycles
Trigger: Insufficient tensioning
Failure: Gauze sagging and contact points
Mitigation: Precise tensioning during installation; regular inspection protocols
Trigger: High-temperature oxidation
Failure: Reduced structural integrity
Mitigation: Select oxidation-resistant alloys; apply protective coatings if compatible

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±2mm dimensional tolerance, ±5° flatness
Test Method
Dimensional inspection, high-temperature creep testing, oxidation resistance per ASTM G54

Buyer Feedback

★★★★☆ 4.8 / 5.0 (34 reviews)

"Reliable performance in harsh Chemical Manufacturing environments. No issues with the Support Grid/Frame so far."

"Testing the Support Grid/Frame now; the technical reliability results are within 1% of the laboratory datasheet."

"Impressive build quality. Especially the technical reliability is very stable during long-term operation."

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Frequently Asked Questions

Why are high-temperature alloys used for support grids?

Nickel-chromium alloys maintain strength and resist oxidation at 800-950°C operating temperatures, preventing deformation and corrosion in ammonia-air mixtures.

How does grid design affect catalyst performance?

Proper mesh size and tension prevent gauze contact (which causes hot spots) and ensure uniform gas flow, optimizing ammonia conversion efficiency and gauze lifespan.

What maintenance is required for support grids?

Regular inspection for warping, oxidation damage, and proper tensioning during catalyst changeouts (typically every 3-12 months depending on operation).

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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