Opti-Coat™ Filter Bag Conditioning Agent
Opti-Coat™ is a chemically inert, light density powder that is injected into the baghouse to establish a uniform porous dustcake on the filter bags for maximum even air flows. Opti-Coat enhances operational efficiency and provides unequaled bag protection from moisture, particulate bleed-through, hydrocarbon carryover, bag blinding, oil, and tacky or viscous contaminants.
Procedures for Filter Bag Pre-Coating
- The amount of Opti-Coat utilized should be a minimum of 0.05 lbs. per ft2 of baghouse filter cloth area.
- Prior to injection of Opti-Coat:
Ensure that all previous dust has been evacuated from the baghouse hopper, then turn off the hopper removal equipment.
Deactivate (lockout) the bag cleaning cycle to prevent filter bag cleaning during the pre-coat period.
- Operate system at approximately 50% of design airflow to the baghouse for resulting airflow velocity of approximately 2000 ft/min through the inlet duct, but not less than 200 ft/min (typical minimum dust carrying air velocity).
- Inject Opti-Coat at the feed rate of 0.3 lbs/min per 1000 ACFM of reduced gas flow to the baghouse. (Example: 50,000 ACFM to Baghouse / 1000 ACFM x 0.3 lbs. = feed rate of 15 lbs/min.) For baghouses operating under suction, the Opti-Coat can be injected through ports or inspection doors in ducts or hoppers. For positive pressure baghouses, the Opti-Coat should be injected into duct at the suction side of the pressure system fan.
- Isolate each compartment and inspect filter bags for adequate pre-coat cake (approximately 1/16" thick) and check inside of hoppers to be sure there is not a large amount of pre-coat dropout.
Once filter bag pre-coating with Opti-Coat is complete, increase the air volume for normal design flow levels to the baghouse and turn on the hopper dust removal equipment. However, do not reactivate the filter bag cleaning cycle until a minimum differential pressure of 3-4" S.P.W.G. is measured across the bags. This is to ensure that a seasoned cake of Opti-Coat has been achieved on the filter bags prior to activation of the initial cleaning cycle.
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