INDUSTRY COMPONENT

Converging Section (Inlet)

The converging section of a Venturi scrubber that accelerates gas flow to create high-velocity conditions for particulate and pollutant removal.

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Component Specifications

Definition
The converging section, also known as the inlet or throat entry, is a critical component of a Venturi scrubber designed to gradually reduce the cross-sectional area of the gas stream. This geometric constriction accelerates the gas to high velocities (typically 60-120 m/s), creating intense turbulence and shear forces that atomize the scrubbing liquid into fine droplets, enabling efficient impaction and absorption of particulate matter and gaseous pollutants.
Working Principle
The converging section operates on the Venturi effect principle: as gas flows through a constricted area, its velocity increases while static pressure decreases. This acceleration creates kinetic energy that atomizes injected scrubbing liquid into micron-sized droplets, maximizing surface area for pollutant capture through inertial impaction, interception, and diffusion mechanisms.
Materials
316L stainless steel (corrosion-resistant), FRP (fiberglass reinforced plastic), PP (polypropylene), Hastelloy C-276 (for highly corrosive environments), ceramic-lined carbon steel
Technical Parameters
  • Pressure Drop 500-5000 Pa
  • Inlet Diameter 200-2000 mm
  • Design Velocity 60-120 m/s
  • Outlet Diameter 50-500 mm
  • Convergence Angle 12-25 degrees
  • Surface Roughness Ra ≤ 3.2 μm
  • Length-to-Diameter Ratio 1.5:1 to 3:1
Standards
ISO 13341, DIN 24163, ASME B31.3

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Converging Section (Inlet).

Venturi scrubber converging section gas acceleration inlet pollution control component industrial air scrubber part throat entry design Converging Section (Inlet) Converging Section (Inlet) in Chemical Manufacturing

Parent Products

This component is used in the following industrial products

Venturi Scrubber

A wet scrubber that uses the Venturi effect to remove particulate matter and gaseous pollutants from industrial exhaust streams.

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Engineering Analysis

Risks & Mitigation
  • Erosion from abrasive particulates
  • Corrosion from acidic gases
  • Fouling and buildup reducing efficiency
  • Structural fatigue from vibration
FMEA Triads
Trigger: Abrasive particulate erosion
Failure: Wall thinning and eventual perforation
Mitigation: Install wear-resistant linings, implement regular thickness monitoring, use hardened materials
Trigger: Corrosive gas exposure
Failure: Material degradation and leaks
Mitigation: Select corrosion-resistant alloys, apply protective coatings, implement pH monitoring of scrubbing liquid
Trigger: Improper convergence angle
Failure: Inefficient gas acceleration and poor scrubbing
Mitigation: Follow established design guidelines (15-20°), conduct CFD analysis, perform velocity profiling

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.5% on critical dimensions, ±1° on convergence angle, surface finish Ra ≤ 3.2 μm
Test Method
Dimensional verification with laser scanning, pressure drop testing per ISO 5167, velocity profiling with pitot tubes, NDT for weld integrity

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the optimal convergence angle for a Venturi scrubber inlet?

The optimal convergence angle is typically 15-20 degrees. Angles below 12 degrees cause insufficient acceleration, while angles above 25 degrees create excessive pressure drop and potential flow separation.

How does the converging section affect scrubbing efficiency?

The converging section determines gas velocity, which directly impacts droplet atomization. Higher velocities create smaller droplets with greater surface area, improving particulate capture efficiency through enhanced inertial impaction.

What materials are suitable for corrosive gas applications?

For highly corrosive environments, 316L stainless steel, Hastelloy C-276, or FRP with chemical-resistant linings are recommended to prevent degradation from acidic or alkaline gas streams.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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