Some of the projects that DWEENG Ltd has been involved in are detailed below, to give a sense of the scope of work and experience the company has.
Boiler Upgrade
Electrical engineering design and drawings for fuel handling, John Thompson & Trevor Boilers.
Software simulation and testing of boiler controls including: 3-element drum control with auto charge to single element on low steam flow, boiler pressure control, ID fan furnace pressure control loop, plant master controls, automatic steam shedding & vent control, and modified controls to all steam-related services around site. Commissioning, validation, training and start-up support included.
Dairy Plant Ancillary Services
Electrical engineering & software control of water, waste water and other ancillary services for a new dairy plant, including tender documents.
Electrical engineering and software control of ancillary services for a new UHT plant, including tender documents.
Wood Chip Infeed Upgrade
Involving 28 motors and various input devices (limit switches, rotation sensors). All relay logic was replaced with PLC equipment and software, simulated before installation. Commissioning time was significantly reduced through efficient planning.
Press PLC Software Upgrade
Changed old PLC2, 3 & 5 logic into ControlLogix, with improved modern control methodologies.
MDF Finishing Line Saw Upgrade
Engineering design, investigation, CAPEX and software installation involving AB ControlLogix, HMI and DeviceNet Servo drives.
Included commissioning and HMI implementation.
Logo & Bar Code Printing
Three different lines upgraded to bar code and high resolution printing — investigation, CAPEX preparation, engineering design, software and installation.
Equipment used: AB ControlLogix, AB PanelView, Patreon Marsh printers.
Geothermal Heat Exchangers
Worked with mechanical engineers on 2 x 12MW and 1 x 8MW geothermal generators (E&I costs $750K).
Electrical engineering design, project management, software functional description, instrumentation, tender documents and liaison with all contractors and both clients.
Realistic Fire Training Building
Electrical design along with PLC and HMI controls for better temperature monitoring of the building, including specification and drawings for tender purposes.
Detailed electrical and software engineering, reporting and construction management.
Tissue Mill: Various Projects
PM2 Drives upgrade: electrical engineering & software. Paper machine PLC5 to ControlLogix software conversion and control changes on the reel arm system. Created a "design & build" document, project & control management, contract monitoring and commissioning.
Machine guarding projects.
Rural Fire Station Electrical Upgrade
Assessed fire stations for electrical upgrade.
Prepared tender documents for the work required following the assessment.
Designed a generator to supply critical services.
Pulp & Paper Mills: Various Projects
Complete E&I project for a $24 million upgrade involving MCC design & control, DCS connection & 120 control loops — vendor evaluation, electrical engineering design, project management and hazardous area design.
Machine guarding project, mostly on the baling line.
Sensodec No.6 paper machine vibration monitoring system — complete engineering design to vendor specifications including mechanical & electrical installation, and project management across all stages of installation.
PLC recovery boiler upgrade — head engineer overseeing replacement of a 5/250 PLC with a ControlLogix PLC.
Pulp bale line upgrade — ControlLogix PLCs (2 x L63), RSView HMI interface, mainframe data communications, scale, moisture measurement, inkjet printing and laser scanning. Full project management, electrical design, drawings and installation supervision, PLC simulation and commissioning. A core group of four engineers worked on this for seven months.
District Council Waste Water Treatment Plants
Pump station electrical design & controls, functional description.
Engineering investigation, design & specification, reports with costing and control options, electrical drawings & specification.
