CROSSFLOW SCRUBBER | CROSS SECTION VIEW | CHART

Crossflow Scrubber Guarantees Your Operating Permit Level Out the Stack for HCl, HNO3, HF, H2SO4, Cl2, H2S, and NH3.

FUME SCRUBBER SPECIFICATIONS

They consist of one or two stages, each having elements that are suited to the function that
it performs.  The first stage removes the bulk of the contaminant from the air stream.  It may be
continuously wetted to prevent plugging.  The second stage is a mist eliminator.

In a wet scrubber, water or scrubbing liquid is the media which removes pollutants from the air. 
When the water is recirculated, addition of fresh water is necessary to purge contaminants that
accumulate and to replace evaporation losses.  Fresh water may be added to the recycle
reservoir either continuously or on a periodic basis.

Scrubbers are frequently used in applications where the air stream is being treated to remove
acid fumes.  Strong alkali is often added to the recycled scrubbing solution in order to neutralize
the acids and maintain a neutral pH.  The addition of chemical may be controlled manually,
or automatically by a pH controller.

The Fume scrubbers can be fabricated from homogenous, virgin-grade, UV-resistant
polypropylene homopolymer, or PVC using hot gas welding methods, Mild Steel,
304 Stainless Steel, 316 Stainless Steel.  All units are hydrostatically tested at the factory. 
The maximum temperature rating for polypropylene units is 180° Fahrenheit
and 140° for PVC. 

Bolted access ports are provided for inspection of the interior packing and mist eliminator
elements.  Gasket made from closed cell PVC foam is provided.  Hardware is 316 S.S.
maximum bolt torque 10#.

1)  INTENT

This Specification defines the design requirements, the quality and types of workmanship
and materials, and the performance standards and guarantees for equipment, materials
and services supplied by Tri-Mer Corporation.

2)  SCOPE

The vendor (Tri-Mer Corporation) shall furnish wet scrubbers complete with auxiliaries and
options described herein.  The system shall include but is not limited to the following:

• All scrubber internals necessary to provide adequate process capture and to
  achieve the designed performance.

• Mist eliminator to achieve entrained liquid separation.

• Flanged connections for all external water fill, water makeup and drain piping
  as required and optioned

• Controls if optioned, to automatically feed make-up water, control liquid level,
  monitor pressure.

• Fan if optioned.

• Complete shop coating of required areas with Tri-Mer Coat or resistant paint
  for external surfaces.

• Self contained recirculation system or remote recycle tank.

• Full turnkey systems.

3)  DESIGN REQUIREMENTS

• The Wet Scrubbers shell shall be manufactured of Polypropylene, Polyvynilchloride,
  (PVC) Stainless steel or Mild steel.  Vendor shall evaluate materials and select the
  most appropriate material for this service.

• The Wet Scrubber shell shall be provided with access ports / doors to allow limited
  access to the internals of the unit.  The Scrubber shell shall be equipped with flanged
  pipe connections or female NPT connections for the introduction of makeup and
  drain water as well as various types of level control, pH fittings, and recirculation
  liquid connections. 

• The Wet Scrubbers shall be equipped with random dumped Jaeger Tri Pack packing. 
  The depth of the packing shall be determined per application by TRI-MER Corp.

• The Wet Scrubber shall be equipped with a high efficiency (95% @ 15 micron
  and larger) mist eliminator of the chevron blade type of a coalescing type mesh pad.
  (99% @ 10 micron and larger mist)  Material of construction for the mist eliminator
  shall be PVC (Polypropylene, Stainless Steel also available).

• The fan, if optioned, shall be manufactured from (FRP, PVC/PP with coated steel
  impeller, Stainless Steel), or a material which is equally suitable for this environment.

• The fan and motor shall be designed for system static pressure will per application
  depending on packing depth and mist eliminator selection.  Pressure drop calculations
  through the Scrubber plus external delta P for the customers ductwork losses.

• The sound levels generated by the Vendor furnished equipment during normal operation
  shall not exceed 85 dBA-weighted, slow response, under free field condition, at a horizontal
  distance of 10 feet from the surface of sound generation.  The Vendor as optioned
  shall furnish silencers.

• Vendor shall provide electric motor drives for each fan.  Vendor shall be responsible
  for the selection of the motor characteristics and the motor mounting.

• All electrical equipment provided by the vendor shall be supplied in
  NEMA rated type enclosures.

• All equipment manufactured by Tri-Mer Corporation is warranted under the
  standard Tri-Mer Corporation one-year warranty.  All purchased components are
  warranted under the respective manufacturer warranty.

4)  STANDARD SUPPLIED COMPONENTS

Standard Purchased components furnished on the Tri-Mer Corporation Wet Scrubbers are as follows:

• Dwyer Magnehelic differential pressure gage for monitoring pressure drop.

• Hayward or equal manual valves for water fill.

• ASCO or equal electrically actuated solenoid valves for auto water fill.

• Dwyer fresh water make-up flow meter.

• Ansi or equal recirculation pump.

• Signet or equal recirculation liquid flow meter.

• Schedule 80 PVC plumbing.

• Vinyl tubing with traps for differential pressure connections.

• Fan. (See Options)

5)  COMPONENTS SUPPLIED BY END USER

• Tie downs, guy wires, anchor bolts and foundations.

• Field assembly.

• Field wiring

• Fresh water and drain piping to supplied 150# flanges.

• Mating flanges to customer connections, hardware and gaskets.

• Interconnecting duct. (See Options)

• Heat tracing and insulation.

• Remote chemical storage.

6)  OPTIONS

• Electrical Control Panel:  An electrical control panel with NEMA 12 enclosure
  and fused main disconnect switch.  Designed for 460 volt / 3-phase - 60 hertz electrical
  supply.  Internal components of the control panel are pre-wired and terminal blocks are
  provided for connection of external control components to be done by contractor.  A
  motor starter to operate the exhaust fan and recycle pump with pushbutton controls
  mounted on front of the enclosure.  Power lines to the motor must be furnished and
  installed by the installation contractor.  Electrical devices are designed and built in
  accordance with the National Electric Code (NEC) No other codes, standards, or
  specifications are followed unless a specific agreement has been obtained in writing.

• PH Control:  To consist of pH sensor, analyzer, chemical metering pump. 
  Components may be factory installed or shipped loose for remote customer location.

• Automatic Liquid Level Control:  To consist of level sensors,
  and water make-up solenoid valve.

• High and Low Level Alarms:  To consist of level sensors
  and controls in optioned control panel

• Exhaust Blower:  To be constructed of Polypropylene, PVC, FRP,
  Mild Steel, & Stainless Steel.

• PLC Interface

Have a potential application? Contact Tri-Mer

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Tri-Mer Corporation
1400 Monroe Street • P.O. Box 730 • Owosso, MI  48867; USA
Phone:  (989) 723-7838 • Fax:  (989) 723-7844
salesdpt@tri-mer.com

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