The Whirl Wet Dust Collector is a submerged split orifice type Dust Collector having twin opposed fixed blades to create a centrifugal motion to the gas stream. The entrained liquid is separated from the gas stream by an integral chevron or mesh pad mist eliminator as the air flow exits the vessel. Sludge must be removed periodically or continuously from the drain at the bottom of the hopper.

The Whirl Wet Dust Collector can be fabricated from homogenous, virgin-grade, UV-resistant polypropylene homopolymer, using hot gas welding methods, Mild Steel, 304 Stainless Steel, 316 Stainless Steel, or PVC. All units are hydrostatically tested at the factory. The maximum temperature rating for polypropylene units is 180 degrees Fahrenheit. Standard design for all units is to 20 inches of negative pressure. Total pressure loss for the dust collector is 8".

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

The Whirl/Wet dust collector is generally designed for particulate 10 micron and above.

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 the Whirl/Wet Dust Collector complete with auxiliaries and options described herein. The system shall include but is not limited to the following.

1. All Dust Collector internals necessary to provide adequate liquid-process stream contact in order to achieve Dust Collector performance.
2. Mist eliminator to achieve entrained liquid separation.
3. Flanged connections for all external water fill, water makeup and drain piping as required and optioned.
4. Controls if optioned, to automatically feed make-up water, control liquid level, monitor pressure, operate sludge ejector and or discharge timed drain down from the Wet Dust Collector.
5. Fan if optioned.
6. Complete shop coating of required areas with Tri-Mer Coat or resistant paint for external surfaces.

3. DESIGN

1. The Wet Dust Collector shall be of medium energy type. Internals shall be equipped with a fixed-position dual opposed blade system and be designed to prevent the buildup of solids.
2. The Wet Dust Collector shell shall be manufactured of Polypropylene, Stainless steel or Mild steel. Vendor shall evaluate materials and select the most appropriate material for this service.
3. The Wet Dust Collector shell shall be provided with access ports / doors to allow limited access to the internals of the unit. The Dust Collector shell shall be equipped with flanged pipe connections for the introduction of fill and makeup water as well as drainage.
4. The Wet Dust Collector shall be equipped with a corrosion resistant lower reservoir section which will be designed to prevent solids accumulation and will allow for ease of drainage and discharge of slurry.
5. The Wet Dust Collector shall be equipped with a high efficiency (95% @ 15 micron and larger) mist eliminator of the chevron blade type. Material of construction for the mist eliminator shall be PVC (Polypropylene, Stainless Steel also available). 
6. The fan shall be manufactured from (FRP, Mild Steel, Stainless Steel), or a material which is equally suitable for this environment.
7. The fan and motor shall be designed for a static pressure capability of at least the 8" pressure drop through the Dust Collector plus external pressures for the customers ductwork losses. 
8. 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.
9. Vendor shall provide electric motor drives for each fan. Vendor shall be responsible for the selection of the motor characteristics and the motor mounting. 
10. All electrical equipment provided by the vendor shall be supplied in NEMA rated enclosures.
11. 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

Standard Purchased components furnished on the Tri-Mer Corporation Whirl/Wet Dust Collectors are as follows:

1. Gems Level Switches, #19375 factory mounted for high and low alarms. 
2. Dwyer Photohelic differential pressure gage for level control, #3015.
3. Hayward or equal manual valves for water fill.
4. ASCO or equal electrically actuated solenoid valves for auto water fill.
5. Schedule 80 PVC plumbing.
6. Vinyl tubing with traps for differential pressure connections.
7. Fan. (See Options)

5. COMPONENTS

1. Tie downs, guy wires, anchor bolts and foundations.
2. Field assembly.
3. Field wiring.
4. Fresh water and drain piping to supplied 150# flanges.
5. Mating flanges to customer connections, hardware and gaskets.
6. Interconnecting duct. (See Options)
7. Heat tracing and insulation.

6. OPTIONS

1. Electrical Control Panel: An electrical control panel with NEMA rated 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 with pushbutton controls mounted on the 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.
2. Timed Drain Down: Periodic draining of sludge from the bottom of the hopper can be controlled automatically by components supplied in this package. A pneumatically-actuated butterfly valve is provided for the hopper drain connection. The frequency of opening and the interval during which the valve remains open are controlled by adjustable timers which are mounted in the control panel. If a control panel is not optioned, the components are mounted in a J-Box on the Whirl/Wet. A pressure regulator with lubricator with gage, solenoid valves and ball valves are provided for the air line to the actuator. Air piping is not supplied.
3. Equalizer: The Tri-Mer Corporation trade mark Equalizer continuously drains liquid out of the hopper, while simultaneously keeping the proper level in the Whirl/Wet.
4. Corrosion Resistant Liner: (Mild Steel Units Only) Whirl/Wets fabricated from mild steel can be coated with a coal tar epoxy liner. This coating has excellent adhesion characteristics, superior abrasion resistance, and provides excellent corrosion resistance.
5. Top Mounted Blower: This option allows space savings by locating the blower on top of the wet dust collector. This package includes:
1. Steel channel frame with vibration isolators or rails.
2. Interconnecting duct.
3. All hardware for connections.
4. PLC Interface: 
6. A programmable logic controller (PLC) shall mediate control of system functions. The programmable controller shall be mounted within the control panel enclosure.  The programmable Logic Controller (PLC) shall be Allen Bradley or equal.

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