Application and design requirements.
- multi-section scrubber frame;
- irrigation system with centered tangential jets (replaceable);
- with sludge regulative float device;
- emergency water supply system
Contaminated gas is fed by inclined gas flue to the bottom of the scrubber and rises up the frame. On the top of the scrubber there are 3 irrigation tiers, which consist of centrifugal jets. Lime-water suspension (CaCO3), that is under pressure, is spraying. Drops of aqueous solution CaCO3, are falling due to gravity towards contaminated gas. Water drops capture dust articles happens due to inertial and diffusion mechanism, hydrodynamic and electrostatic forces and turbulent diffusion. Gas cleaning from sulfur oxides is based on absorption technology. After contact of lime-water suspension with gas, reaction takes place:
СаСО3 + SО2 + ½ Н2О = СаSО3·1/2Н2О + СО2
Oxygen, which is in the products of combustion, oxidizes the calcium sulfate in neutral sulphate (gypsum):
СаSO3 ·1/2H2O +1/2O2 = CaSO4·2H2O
Exhaust aqueous solution with gypsum and captured dust is accumulated in the bottom of the scrubber. Peeled gas is fed by gas flues, which are located on the top of the device. For pulling of the sludge there is a special device, which consists of float camera and throttle control, that supports a given level of sludge in the hopper.
Scrubber frame is designed for organization of gas flows and water drops. Irrigation system is designed for supplying and spraying of the water in the scrubber frame. Drainage sludge mechanism is designed for automatic removal of sludge from scrubber frame. Emergency water supply system is designed for stopping of water supplying if it is impossible to remove sludge from scrubber frame.