Reversejet scrubber for control of fine particulates
Reports that the pressure drop of this reversing jet spray system, which removes particulates from hot process and exhaust gas streams, is half of the gas-phase pressure drop of conventional wet scrubbers. The Reverse jet scrubber uses multiple reversing scrub liquor sprays to achieve the gasliquid interfacial area, residence time, and high differential velocities required for efficient heat and mass transfer, and particulate collection. Analysis of pilot-scale particulate removal data, obtained with the air-water-dioctyl phthalate (DOP) mist system at ambient conditions, permits a generalized Reversejet design procedure to be developed. This design procedure, verified with field tests involving cleanup of hot exhaust gases from oil-fired burners, provides a sound basis for the specification of commercial-scale equipment. The scrubber is compact, and nonfouling due to its open structure design. Half of the scrubber power input is applied to the gas phase, and half to the liquid phase. Describes a particulate collection model, based on single-spray droplet collection efficiencies. Relevant parameters in this model are: the maximum stable spray droplet size; the relative velocity between the spray droplets and the gas; the size of particulate to be removed; the jet turnaround length; and the effective, volumetric gas-liquid contact area. The pilot-plant scrubber on oil-fired combustion gases obtained removal efficiencies of up to 78%. Proposes a preliminary design for cleanup of hot fuel gas from a fluidized-bed-type coal gasifier.
- Research Organization:
- Koch Engineering Co., Inc., Wichita, KS 67208
- OSTI ID:
- 6309249
- Journal Information:
- Chem. Eng. Prog.; (United States), Journal Name: Chem. Eng. Prog.; (United States) Vol. 79:2; ISSN CEPRA
- Country of Publication:
- United States
- Language:
- English
Similar Records
University of Washington electrostatic spray scrubber evaluation. Final report, Dec 1974--Dec 1975
Confined vortex scrubber