Pennwalt Ltd. products

Water treatment and many other technical processes frequently require the use of oxidising gases such as chlorine or chlorine dioxide. These gases are highly toxic and corrosive. Therefore special precautions have to be taken in areas where such gases are used.

The moment the Chlorine leak is detected by any of the sensors, the blower would start automatically sucking the Chlorine air mixture through the hood on leaking ton container and only air through the other hoods on the non-leaking ton containers or through the ducting laid in Chlorine Ton Container room. Simultaneously the caustic re-circulation pump would start working, taking the caustic solution from the tank and pumping it to the top of the tower. This caustic solution gets sprayed through the nozzles in the tower over the PP pall rings. The gas air mixture travels in the tower from bottom towards the top whereas the caustic solution travels from top towards the bottom. Hence with this counter current travel, the Chlorine gas gets neutralized by the caustic solution as the packed portion provides the required contact tank. The air discharging at the blower outlet is practically free of Chlorine gas.

The Pennwalt Series 50-200 Evaporator (sometimes called a "vapourizer") is an electrically heated immersed-tank-type heat exchanger. It is necessary wherever the rate of unaided gas withdrawal from multiple containers is not fast enough to keep up with requirements.