HORIZONTAL CROSS-FLOW (HCF) SCRUBBERS

Scrubber Base Tank:

A rectangular base tank usually incorporated into the scrubber body on smaller versions or a separate flanged tank on larger versions.

Pre-Wetting Section:

• the Gas Inlet Nozzle (the extraction duct connects to this nozzle)
• A Spray chamber. This saturates the incoming air stream using the scrubbing solution and ensures proper wetting of the packed bed on the inlet side.
• The Gas Injection Support Plate. This supports the tower packing and is specially designed to provide a low pressure drop and maximum air diffusion across the packed bed.

Scrubbing Section:

• The Support Plate. This supports the scrubber packing and allows scrubbing solution to drain back to the tank.
• A Top Sight Glass Nozzle. This sight glass nozzle serves as an inspection point at the top of the packed bed and as a packing filling point if the lid plate is not removed. In the case of multiple backed beds each packed bed will have such a nozzle.
• The Liquid Distributor. Liquid distributors come in various forms depending on the contaminant being scrubbed, the size of the packing chamber and the liquid flow rate required. Their primary function is to evenly distribute the scrubbing solution over the packed bed to maximise wetting of the packing and to eliminate channelling (uneven flow through the packing resulting “dry” areas). Correct liquid distribution is absolutely critical to a successful scrubber design.
• The Tower Packing Material. This tower packing is of the “random” type in that the injection moulded or formed packing shapes are supplied in bulk and the chamber is filled to the required design height. The individual packing pieces are thus randomly arranged throughout the packed bed providing maximum liquid and gas distribution and thus maximum contact.
• A Demister (Droplet Eliminator). This is the final stage in the scrubber column and is required to remove liquid droplets carried up by the airstream. This is critical to reduce water losses through the scrubber and to extend the life of the scrubbing solution. The demister can be in the form of a knitted mesh pad (plastic or metallic) or a chevron plate configuration (plastic or metallic). Selection is based on each particular scrubber design. The most common demister used is a knitted mesh pad usually in Polypropylene.

Extraction Fan

In the majority of cases this fan will be a COLASIT fan in a corrosion resistant thermoplastic material suited to the application. This fan will discharge into an exhaust stack.

Circulating Pump

This pump circulates the scrubbing solution and can also be used for blow-down (partial dumping of spent/contaminated scrubbing solution) and draining/transfer of the scrubbing solution. These pumps feature corrosion resistant materials of construction suited to each specific application.

X-Vent Fume Scrubbers are available in the following standard sizes

• X-Vent 1000 - Up to 1000m3h Scrubbing Capacity.
• X-Vent 1500 - Up to 1500m3h Scrubbing Capacity.
• X-Vent 2000 - Up to 2000m3h Scrubbing Capacity.
• X-Vent 2500 - Up to 2500m3h Scrubbing Capacity.
• X-Vent 3000 - Up to 3000m3h Scrubbing Capacity.
• X-Vent 3500 - Up to 3500m3h Scrubbing Capacity.
• X-Vent 4000 - Up to 4000m3h Scrubbing Capacity.
• X-Vent 5000 - Up to 5000m3h Scrubbing Capacity.
• X-Vent 6000 - Up to 6000m3h Scrubbing Capacity.
• X-Vent 8000 - Up to 9000m3h Scrubbing Capacity.
• X-Vent 10000 - Up to 10,000m3h Scrubbing Capacity.