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Alfa Laval Brew 750 Separator

Introduction

The use of separators in different brewery applications goes back to the beginning of the 1900s. Based on the long-term cooperation with the brewery industry, Alfa Laval separators are specially designed for the requirements and demands of this industry.

The Brew separators are high performance clarifiers with intermittent solids discharges. The design ensures low power consumption and minimum oxygen pick-up.

The Brew separators are offered as complete skids or modularized systems that are easy to install and operate. They are fully equipped with a user-friendly control panel, valves, instruments, and other components for process and utilities control.

Application

The Brew 750 is specially designed for green beer and beer pre-clarification or polishing duties with the target to produce the best quality beer with high performance and maximized yield.

Benefits

• High separation efficiency
• No oxygen pick-up
• Gentle treatment of the product
• Low water consumption
• Complete system handling both process and utility requirements
• Robust and reliable design

Design

The Brew 750 separation system consists of a separator, a process & service liquid unit, and an electrical & control system.

The disc stack separator is based on the Alfa Laval’s fully hermetic concept with bottom fed design. The bowl is sealed mechanically to prevent oxygen pick-up in the clarified product. The separator has variable discharge volume, which leads to minimum product loss. The system is modularized and it can be configured from a selection of basic and other optional standardized units and control functions. The control system includes a PLC and a user-friendly HMI to monitor and control the separation process parameters. The system can be configured for remote operation.

All metallic parts in contact with the process liquid are made of stainless steel. Gaskets and seals in contact with the product are made of FDA approved material and are approved according to food regulations (EC1935/2004).

The separation system is designed for automated Cleaning in Place (CIP).

Scope of supply

The Brew 750 separation system includes the following main components:

• Disc stack separator
• Process & service liquid unit:
  – Valves, instruments and other components
  – Automatic flow and back pressure regulation valves
  – Sight glasses
  – Sample valves
  – Turbidity triggered solids discharge function
• Electrical & control system:
  – Control cabinet with PLC and HMI
  – Motor starter cabinet with VFD
• Commissioning spares
• Set of special tools
• Documentation
• The system is available in two pipe size configurations: DN80 and DN100.

Options

• Feed pump
• Solids receiving unit (a collection device and a transfer pump for discharged  solids)
• Capacity control by inlet turbidity
• Solids control (recirculation of the clarified product)
• Integrated blending by-pass
• Cooling unit
• Service options:
  – Commissioning
  – Operators training (basic and advanced level)
  – Basic service agreement
  – Performance agreement

Working principle

The process & service liquid unit monitors and regulates the flow and pressure of the feed and utility liquids in and out of the separator.

The feed enters the separator bowl from the bottom via the drive spindle. Separation takes place between the bowl discs as a result of the centrifugal force that causes the solids to move towards the periphery. The clarified/separated liquid is continuously pumped out of the hermetically sealed separator by an integrated impeller through the outlet at the top of the separator.

The solids collected in the periphery of the bowl are discharged intermittently through the discharge ports. The discharge is triggered by a turbidity meter mounted on the clarified product outlet pipe. Water is used to control the movement of the sliding bowl bottom part that opens and closes the discharge ports. The discharged solids decelerate in the sludge cyclone and can be pumped out of the system by the optional solids receiving unit.

The process & service liquid unit also controls the separator’s discharge system, flushing, and CIP.

1. Feed inlet
2. Distributor
3. Disc stack
4. Liquid phase outlet
5. Sliding bowl bottom
6. Solids discharge ports
7. Solids outlet from cyclone

Technical data

Performance data

Connections 

Material data

Weights

Dimensional drawing 

Dimensions