The Hidden Value in Your Off-Gas
Some industrial processes vaporize valuable materials — mercury from chlor-alkali, refining and lamp recycling, plus precious metals in specialty off-gases. Letting them escape is both an emission problem and lost product.
Condensation Recovery Principle
- A corrosion-proof plate heat exchanger cools the metal-laden vapor stream, condensing mercury or precious metals onto a controlled surface for collection.
- Stainless-steel (316L) and inert polymer cores resist the aggressive condensate and prevent re-entrainment.
- The system sits upstream of or alongside abatement, turning a compliance cost into recovered material.
Typical Applications
- Mercury vapor recovery from petrochemical and industrial boiler off-gas.
- Precious-metal condensation in specialty chemical and recycling exhaust.
- Closed, isolated loops that keep toxic streams away from personnel and product.
Our plate and polymer air-to-air exchangers are built for exactly these corrosive, high-value streams. See the full Applications & Solutions set, or talk to us about a recovery skid sized to your gas.
In some refining, recycling, and specialty processes, exhaust streams carry vaporized mercury or precious metals that have both economic and environmental value. Capturing these vapors depends on cooling the gas below its condensation point so the material drops out before the stream is released to the atmosphere. That captured value would otherwise be lost.
Air-to-air heat exchangers provide the controlled cooling step, often as a pre-stage before filtration or adsorption. Because the condensate can be toxic or valuable, the recovery path must be sealed and isolated, with no mixing between the process stream and any ventilation air. Fully welded or plate designs in suitable alloys prevent cross-leakage between the dirty and clean sides.
Material and surface choice follow the condensed species: mercury is aggressive to many metals, so the contact path needs a compatible alloy or lining, and the design must allow safe collection and handling of the recovered material. Contamination control is paramount, so rotating wheels that share air paths are unsuitable here and would risk spreading hazardous vapor.
This kind of recovery turns an emission problem into a resource stream, recovering value while supporting compliance with environmental limits. It requires close work with a supplier who understands both thermal design and the handling constraints of hazardous condensate. Done correctly, the exchanger pays for itself through recovered metal and avoided disposal or emission costs, improving both the balance sheet and the permit position.