Flue Gas Desulphurisation
Introduction

Paramount provides world famous and proven Andersen's Sulphur Dioxide Scrubbing System with a minimum 95% Sulphur Dioxide removal. Unique feature worth mentioning is that, the system works equally well on low and high inlet Sulphur Dioxide concentrations. Even with large variations in the inlet Suphur Dioxide concentrations to the scrubbing system, the system produces an almost constant outlet Sulphur Dioxide concentrations. This characteristic of our scrubbing system is due to its operation in the "concentrated & absorption chemical mode". This system differs substantially from the other Sulphur Dioxide removal processes. 

The acting chemical in the scrubbing system is Sodium Sulfite. The concentration of dissolved solids in this system is maintained at a much higher level than other conventional system enabling the system to have low recirculated liquid flow rate to the scrubbing system and more Sulphur Dioxide capturing capacity per unit volume of scrubbing liquid. This characterises in the reduction of recirculation system.

The scrubbing system also uses patented non plugging low differential pressure spray baffle type scrubber. Though both horizontal and vertical versions are available, we recommend the horizontal unit which provides the greatest ease of operation and maintenance. The horizontal unit enables construction and complete assembly of the scrubbing system before transported to site for smaller systems. This system can be transported completely prewired, prepiped and all electrical and piping connections duly tested in the factory itself before delivery. The unit has it's own skid and can be listed as a single piece ready to be installed on suitable concrete foundation. Various utilities are then connected to complete the system. The system requires comparitively smaller ground space.

Another unique feature of our scrubbing system is it always operates in an acidic mode. When NaOH is added to the system as the make up reagent, it converts to Sodium Bisulphite back to Sodium Sulphite, rather than existing in the scrubbing solution as free Sodium Hydroxide. The same is true in case soda ash is used in place of NaOH.

Another common problem in conventional scrubbers is Calcium scaling in the scrubber. The scaling magnitude is predominant in alkaline mode of operation as Calcium precipitate as Calcium Carbonate and Calcium Sulfate causing severe scale formation in the scrubber. This scrubbing system operates on acidic mode of operation and even dramatic variations in Sulphur Dioxide variation cannot take back the system to alkaline mode of operation thus Calcium precipitation is practically avoided in this design of scrubbing system.