Hamworthy Combustion Gas Quenchers, thanks to their expressly developed dual feed technology, ensure the effective and complete adiabatic saturation of gases even at very high temperature.
Quencher design has been developed for severe, dirty application with sticky dusts typically generated by wastewater incineration and is suitable also for acid and corrosive gases such as those coming from off-gas or vent-gas incineration units.
Hot gases enter the Quencher from the top through an anti-acid bricks refractory-lined nozzle and flow down the quenching zone where the quenching liquids are fed to the pool and to the spray tips. Liquids fed to the pool overflow down the inner surfaces and create a continuous liquid film that protects the shell. Liquids fed to the spray tips are atomized inside the gas stream thus capitalizing on the gas turbulence for optimal heat and mass transfer.
Hamworthy Combustion Gas Quenchers can be installed immediately above a Hamworthy Combustion Venturi Scrubber, thus becoming part of an integrated system that puts together in a single stage gas quenching and high efficiency dust collection capabilities.
Complete adiabatic saturation is ensured even at turn-down ratios as low as 20% of design gas capacity with no need for automatic control loops on circulation rates. Gas temperature as high as 1,100°C (2,000°F) and quenched gas flow rates up to 170,000 m3/h (100,000 acfm) can be processed in a single unit. Spray tips are operated with slight excess liquid (referred to evaporated water) and fairly low pressure drop so that head requirements of pumps are minimised. A recycle tank can be integrated in the downstream wet scrubbing system or dedicated to the quenching stage. Quenching liquid can be recycled slurry with suspended solids or dissolved salts, fresh water or a combination of the two. Single quenching units as well as complete packages including scrubber, piping, ductworks, rotating equipments etc. can be supplied. ASME Code or any other international pressure vessel design code can be applied.