A2V were appointed by SCOT for a solution to the problem of noxious gasses in their factory. The gasses are produced in a number of tanks as part of the tanning processes and include, ammonia, hydrogen sulphide, chlorine and sulphur dioxide.
The factory was already equipped with an extraction system and a wet scrubber which was not operating effectively. In particular, the chlorine emmitted from four of the process tanks was creating an unpleasant working environment for personnel and causing severe corrosion of the equipment and factory superstructure.
A2V carried out extraction tests on site to determine the best point for extracting the gasses and the optimum design extraction rate. Chlorine concentrations were also measured on site at the optimum extraction rates for the design of the wet scrubber system. A proposal was submitted comprising the following key elements:
A new extraction system would be installed to the four process tanks where chlorine in produced. The chlorine would be expelled to atmosphere via a high velocity discharge cowls.
The existing extraction system would be upgraded with a new blower to achieve the extraction rates required to vent the remaining process tanks in the factory. These noxious gasses would be also be expelled to atmosphere via a separate high velocity discharge cowls.
A wet scrubber would be installed to scrub the chlorine emissions if it was found to be problematic.
Phase 1 was commissioned in March 2011 and successfully improved the operating conditions within the factory.