THE AirScrubber™ (Mesh Pad) OPTION
POLY PRODUCTS INC offers an optional AirScrubber™ (Mesh Pad) to reduce the already minimal air emissions from the Poly Products EVAPORATIVE TANK™ by an additional 98%. The AirScrubber™ (Mesh Pad) consists of a 2” thick, knitted, polyethylene mesh pad with a spray wash-down system. The spray wash uses about 4 gallons of water per cleaning.
The overall design of the Poly Products EVAPORATIVE TANK™ suppresses air emissions. Other evaporators depend on “spheres” or other packed media for wet surface area, where droplets splash repeatedly from surface to surface as the liquid passes through the bed; this packing is prone to clogging, especialy in waste water applications. The Poly Products EVAPORATIVE TANK™ uses large wide-open passageways for free flowing solution to pass through without a restrictive "packing" to clog. The evaporation surface is provided by the solution droplets coming in direct contact with the air as it passes through. Emissions are suppressed by the impingement design from the custom, triple-effect, chevron mist eliminator. All of this contributes to making the Poly Products EVAPORATIVE TANK™, by design, lowest in emissions – by far!
The AirScrubber™ (Mesh Pad) is offered to those who recognize that future air quality standards will only become more stringent, and wish to keep in compliance with (and even ahead of) these changes. The AirScrubber™ (Mesh Pad) reduces the already small emissions of the Poly Products EVAPORATIVE TANK™ by at least another 98%.
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Required washing spray bar installed through the hood of the Poly Products Evaporator. |
The AirScrubber (Mesh Pad) is positioned under the blue vent transition and over the Mist Eliminator |
STACK DESCRIPTION AND AIR EMISSIONS
WITH AND WITHOUT OPTIONAL AIR SCRUBBERTM (PE)
The air emissions from an atmospheric evaporator are in the form of solution droplets entrained in the air stream. POLY PRODUCTS INC minimizes emissions from an EVAPORATIVE TANKTM by:
- Overall products design.
- Stay-Wet, triple-effect, chevron mist eliminator.
- Optional AirScrubberTM, polyethylene MeshPad.
ET-III-W |
ET-II-W |
ET-Companion™ Condenser |
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EXHAUST STACK: |
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| DIA., INCHES: | 16 | 16 | |
| CENTIMETERS: | 40.64 | 40.64 | |
| cfm: | 3,200 | 2,500 | 2,000 |
| m3/min. | 70.78 | 84.94 | 57.60 |
STACK VELOCITY: |
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| FEET/min.: | 1790 | 2149 | |
| m3/min.: | 545.6 | 655 | |
SOLUTION CONTAINED PER CUBIC METER OF DISCHARGED AIR: |
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| WITH OUT
Air Scrubber™ (mg/m3) |
1.856 | 1.856 | 0.00 |
| WITH Air Scrubber ™ (mg/m3) |
0.03712 | 0.03712 | 0.00 |
NOTE: The emissions from a stack not using an AirScrubber™ were measured over an 8 hour period. The emissions figure from a stack using an AirScrubber™ were calculated using figures provided by the nozzle and MeshPad manufactures. NO indication of the presence of chromic acid was obtained when testing with a DRAEGER Air Sampler, verifying that the emissions were less than 0.222 mg/m3.