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Baghouse to Product Silo // Zimbabwe

Pneumatic
Transfer System

Design, fabrication and equipment supply for a pneumatic transfer system moving fine, dry baghouse dust from ground-level collection to the main product silo via a 27 metre vertical lift.

Zimbabwe
Fine Dust / Baghouse Product Transfer
PZIM-01

Project Stats

Project IDPZIM-01
CategoryFine Dust / Baghouse Product Transfer
LocationZimbabwe

Project Overview

RULA designed, fabricated and supplied a complete pneumatic conveying package — pressure vessel, ceramic-lined bends, conveying and compressed-air piping — to move fine baghouse dust 27 metres vertically into the main product silo, with third-party AIA inspection, full quality documentation and commissioning support catered for separately.

// Comprehensive Scope

Scope Of Supply & Engineering

Material Characteristics
Mass Flow Rate10 t/h
Aerated Bulk Density1,100 kg/m³
Settled Bulk Density1,600 kg/m³
Moisture Content0% – Dry
Particle Size DistributionFine baghouse dust, <500 µm
Site Altitude1,300 m
Conveying System
Horizontal Conveying Distance8 m
Vertical Lift27 m
Total Conveying Pipe Supplied35 m
Vertical Sections1
Conveying Bends4
Feed Points1
Discharge Points1

The system battery limits extend from the outlet flange of the knife-gate valve beneath the baghouse air slides to the inlet flange of the main product silo.

RULA Scope of Supply

RULA’s scope included the design, fabrication, procurement and ex-works supply of the pneumatic conveying equipment. The system comprises:

  • Pneumatic conveying pressure vessel
  • Pressure vessel filling butterfly valve
  • Filling compensator
  • Pressure vessel isolating butterfly valve
  • Approximately 35 m of conveying pipe
  • Four ultra-long-radius ceramic-lined conveying bends
  • Approximately 10 m of compressed-air supply piping
  • Isolation valves
  • Laval nozzle
  • Non-return valves
  • Orifices
  • Pressure transmitter
  • Pressure vessel vent piping back to the baghouse
  • Required vent isolation valve
Engineering & Design

The pressure vessel was designed in accordance with PD 5500 and included third-party design review and approval by an Authorised Inspection Authority (AIA). AIA inspections were incorporated during fabrication, followed by final fabrication approval of the pressure vessel. RULA also developed the required system documentation, including:

  • Installation General Arrangement drawing
  • Process flowsheet
  • High-level system description
  • Operating philosophy
  • Quality documentation
  • Equipment databooks
  • Operation and Maintenance manuals
Piping & Equipment Specifications

Straight conveying pipework was specified as ASTM A106 seamless Schedule 40, without internal lining. The conveying bends were designed as ultra-long-radius bends with ceramic lining to provide additional wear resistance at high-impact areas. Air piping was specified in accordance with:

  • SANS 62 for pipe sizes up to and including 150 NB
  • SANS 719 for pipe sizes of 200 NB and larger
Corrosion Protection

Non-proprietary equipment was protected using a two-coat corrosion protection system in accordance with the applicable Hatch painting and protective coating specification. For pressure vessels and piping, the coating system was applied externally. Proprietary equipment was supplied with the respective OEM’s standard corrosion protection.

Quality Assurance

Fabrication and quality control were managed through the RULA Quality Management System, including in-house Quality Control Plans (QCPs). The project quality requirements included:

  • Material and fabrication quality control
  • Pressure vessel inspection
  • Third-party AIA involvement
  • Final fabrication approval
  • Equipment databooks
  • Operation and Maintenance documentation
  • Quality records and certification

Project Outcomes

Design Capacity: 10 TPH
Conveying Distance: 35 m (27 m Vertical)
Feed / Discharge Points: 1 / 1
Coating System: 2-Coat, Hatch Spec
Capabilities Delivered

Considering A Similar Project?

RULA engineers and delivers bulk materials handling systems from initial design through commissioning.