VAKUTEC® - Air scrubber with primary separator WH3

General Information:

VAKUTEC® type WH3 air scrubbers are used when exhaust air needs to be cleaned of impurities that have a high affinity to water and must be separated for environmental protection reasons. This air washer is primarily used for exhaust air containing only chromium in order to return the primarily separated aerosols to the process. Another area of application for this air washer is to increase the service life of the feed liquid by primary separation of impurities. • Application: Stock transfer with high water affinity, increasing the service life of the receiver, chromic acid mist • Features: Primary separator, contact chamber, 2 droplet separator packages, coagulator optional Sizes and performance range Air washers in sizes from DN180 to DN1,250 for volume flows of 1,100 to 68,800m³/h are described below. VAKUTEC® air washers of type WH3 for larger volume flows must be designed separately.

Construction:

The droplet separator unit of the short scrubber is equipped with a quick-release fastener. The continuously fed double spray nozzle is located on a lance that is flange-mounted to the housing. This enables maintenance or inspection within a very short time. The installation direction of the droplet separator unit, right/left or upwards when viewed in the air direction, is adapted to the local conditions.

How it works:

VAKUTEC® type WH3 air washers work according to the principle of mass transfer. The aerosols in the air flow are separated in a separator unit upstream of the contact chamber. The primary separated liquid can either be fed into the process or directly into the waste water system. The double spray nozzle located in the contact chamber is continuously fed. The impurities in the air are transferred to the sprayed scrubbing liquid due to the high water affinity. The aerosols, carried by the air flow, then collide with the droplet separator packages. The liquid droplets are guided by the curvature of the profile to the inner surfaces of the profile and discharged into the collection pockets. In addition, sharp-edged elevations are attached to the surface of the louvre profile to remove the residual liquid. The droplet separator unit can optionally be equipped with a coagulator. The coagulator is placed between the droplet separator units and thus enlarges the very small droplets, which are then separated in the second separator unit. The collected liquid passes through a siphon, which prevents the intake of false air, or is fed directly back into the receiver tank via a dip tube.

Materials:

The materials used depend on the specific physical and chemical loads that occur. Preferably, plastics such as PVC, PP and PVDF are used. In special cases, stainless steel profiles can also be used as droplet separator packages.

Technical data:

With a uniform inflow, the air washer without coagulator enables 99% separation of a limiting droplet of approx. 15µ at a pressure drop of approx. 450Pa. With a coagulator, the separation efficiency increases to a limiting droplet of approx. 10µ at a pressure drop of approx. 600Pa. (The measured efficiency of the separation efficiency of a boundary droplet under laboratory conditions with water at 20° C)

Detailed catalogue with characteristic curves and dimension sheets

WH_high.pdf