Olympus Technologies

oti

OTI – Olympus Technologies, Inc.

Quality Anaerobic Digestion Process Equipment since 1979

  • The leader in Digester Cover Design and Supply
  • Stronger, longer-lasting Digester Mixers for 24/7 service
  • Fast custom Heat Exchanger design, configuration and sizing assistance
  • All facets of equipment manufacturing including engineering support, equipment design, product fabrication and finishing, testing, shipping and field services are provided by full-time OTI employees

 

Digester Covers:11

OTI designs and manufactures Spherical Shell Membrane and Structural Truss digester covers. The Spherical Shell Membrane covers are the recognized preferred cover design for steel or stainless steel digester covers.  OTI supplies fixed, floating, buoyant and gasholder covers from 20′ to 125′ diameter.

OTI has perfected Spherical Shell Membrane design with its EZup features that simplify cover installation.  The result is a higher quality digester cover that  complies with all structural and operational design conditions to extend the useful service life of the cover.  It is easier to install, paint, maintain, and is less costly to install.  Some of the EZup features that help to increase cover life and decrease installed costs are:

  • The use of hollow structural shapes (HSS) for all assembly beams and structural members add strength yet reduce installation costs.
  • Shop formed EZup cover panels reduce field welding and the quantity of components required for installation.
  • Simplified assembly and welding of the perimeter thrust ring/side skirt sections reduce costs.
  • Temporary assembly tabs and brackets accelerate cover assembly prior to field welding.
  • Spacers, leveling gauges, weld wedge clips, location tabs, centering gauges, etc. all add to the streamlined assembly and welding of the cover.
  • Elimination of all acute angled joints and seams increase the ability to effectively blast the completed cover and apply protective coatings.
  • Because all of OTI’s covers are partially pre-assembled as a final quality check before shipment, field fit-up issues are prevented.

 

Fixed Covers:P2

  • Least expensive of all OTI’s digester covers to design, produce and to install.
  • Normally is used where sludge level in the digester does not vary significantly.
  • The cover is supported at the top of the digester tank wall on bearing plates and restrained from upward forces with anchoring saddles.
  • Custom designed for specific project loads such as dead, live, snow, vacuum, seismic, wind load, etc.
  • Ports, manholes, nozzles of virtually any size or shape for digester access, mixer support, instrumentation mounts, etc. are provided as required.
  • Optional tank wall to cover skirt sealing arrangements are available.
  • Walkways, handrail, platforms, ladders, steps, etc. are available where required.

 

 

Floating & Gasholder:P3

 

  • Normally used where sludge level is variable and/or digester gas is required to be stored under the digester cover.
  • Because the cover sits on a pressurized volume of digester gas, it never comes in contact with the sludge.
  • Unique ballast designs are used to fine tune the design to specific operating conditions.
  • OTI’s robust slide-guide assemblies eliminate rollers, bearings, and lubrication tasks while increasing the strength and service life of guide system.
  • Designed for site specific live, snow, vacuum, seismic, and wind load conditions.
  • Custom designed cover ports of virtually any size or shape for access, mixers, instruments, etc.
  • Optional top supported structural assemblies eliminate the need for tank corbels.
  • Fabricated steel or stainless steel wall anchored corbels are often part of the design and supply of floating or gasholder covers.
  • Walkways, handrail, platforms, ladders, steps, etc. are available where required.

 

Buoyant:P4

 

  • Normally used when sludge level is variable and no digester gas is required to be stored under the digester cover.
  • Although the buoyant covers are more costly to fabricate, the design work is more intensive, and they are generally more costly to install, it is the most stable cover related to potential imbalance or “tipping”.
  • Unique ballasting arrangements fine tune cover performance to specific operating conditions.
  • OTI’s robust slide guide assemblies eliminate rollers and bearings while increasing the strength of the overall guide system.
  • Designed for site specific live, snow, vacuum, seismic, and wind load conditions.
  • Custom-designed cover ports of virtually any size or shape for access, mixers, instruments, etc.
  • Optional top supported structural assemblies eliminate the need for tank corbels.
  • Fabricated steel or stainless steel wall anchored corbels are often part of the design and supply of floating or gasholder covers.
  • Walkways, handrail, platforms, ladders, steps, etc. are available where required.

 

Digester Mixers

P5

OTI Digester Mixer Major Features

  • Top-to-bottom or bottom-to-top reversible mixing flow patterns.
  • Mixer draft tubes mounted on digester covers or exterior to the tank wall.
  • Non-fouling cast iron or stainless steel mixer propellers.
  • 5,000 gpm to more than 20,000 gpm designs are available.
  • Heavy-duty designs minimize vibration thereby extending seal and bearing life.
  • Completion of final painting on the mixer assemblies before shipment with fusion bonded epoxy paint – “powder coating”.
  • Factory assembled, tested and certified bearing cartridges.
  • Centering stabilizers minimize effects of turbulent flow.
  • Pressurized, continuous and automatic lower bearing lubrication.
  • High efficiency, XP, TEFC motors are used to drive the mixer.
  • Mixer may be removed from the draft tube while digester remains in service without dewatering or depressurizing the digester.

 

Heat Exchangers:p6

Concentric Tube Heat Exchangers are often used to maintain heat in the anaerobic digesters.  Sludge from the digester is circulated through the inside tubes of the heat exchanger while hot water is passed through the surrounding outer tube as illustrated below.  Heat exchangers are also designed to warm incoming sludge before it is transferred into the digester.  Another application may be for cooling sludge from thermophilic biological processes.

All of OTI’s Heat Exchangers are custom designed using exclusive design tools that accurately and quickly size and predict the performance of the units manufactured.

  • Counter-flow or concurrent flow designs are available.
  • Full inner tube pipe diameter return bends prevent clogging, reduce head loss, and are fast and easy to remove for service procedures.
  • Steel or stainless steel concentric tube designs are available.
  • Galvanized steel or stainless steel insulated panel enclosures are available and have quick release and re-set latches used for panel removal and easy access to the heat exchanger tubes.
  • Standard designs allow cleaning of the inner tubes without removing them from outer tube or the heat exchanger frame.
  • Where restricted access to the heat exchanger installation point within operations buildings, (perhaps at lower levels in these buildings), OTI can design the heat exchanger in small modules that will fit through these restriction points.  The modules are then assembled, anchored, and connected to plant piping to complete the installation.

 

For further information, please contact your Daparak Sales Representative, email us:quote@daparak.com, or call 757-744-9388.