Scrubbing processes

Theie aie several lime-scrubbing processes being marketed. The generalized process is described hy ibsorption... 

The 1970 s also brought about increased use of three-phase systems in environmental applications. A three-phase fluidized bed system, known as the Turbulent Bed Contactor, was commercially used in the 1970 s to remove sulfur dioxide and particulates from flue gas generated by coal combustion processes. This wet scrubbing process experienced several... 

Autopurification A wet-scrubbing process for removing hydrodrogen sulfide from coke-oven gas. The scrubbing liquor was an ammoniacal suspension of ferric ammonium ferro-cyanide. The process was developed by ICI, Billingham, UK, in the 1930s and 40s, but was abandoned in 1947. 

Bacus A scrubbing process for removing olefins and carbon monoxide from gas streams. The adsorbent is a solution of a copper compound that is not deactivated by traces of water. Developed by D. Haase of Herr Haase, Nixon, TX. 

Trencor Also called Trentham Trencor. A wet-scrubbing process for removing residual sulfur dioxide and hydrogen sulfide from the tail gas from the Claus process. 

This chapter will focus on development work for the fixed-bed heterogeneously catalysed abatement process and its integration into the chlorine scrubbing process and other treatment systems... 

Fig. 26.7 Catalytic hypochlorite decomposition integrated into the scrubbing process.

For continuous processes the catalytic reactor, or a hybrid process if satisfactory chemical dosing equipment is already installed, appear to be a near-optimum solution still for many installations. At moderate hypochlorite concentrations, economic benefit does accrue from using the catalyst in-loop rather than end-of-pipe, but these benefits may be offset by any required investment in heat-exchange capability. At concentrations above 10 wt% the integration of decomposition into the scrubbing process is beneficial to the overall cost base of hypochlorite treatment. 

Separating the carbon dioxide is expensive since the scrubbing process uses almost one-third of the energy produced by the power plant. It costs about 30 a ton to separate carbon dioxide from industrial exhaust, although the technology exists to cut this almost in half. One... 

Kerfoot, W. B., 1988, The Soil-Scrub Process for Rapid Decontamination of Gasoline-Impregnated Soil In Proceedings of the Second National Outdoor Action Conference on Aquifer Restoration, Groundwater Monitoring and Geophysical Methods, Vol. I, Las Vegas, NV, May, pp. 123-134. 

A bleed stream from the absorption part of the process is dewatered and dried. The crystals of magnesium sulfite and magnesium sulfate are then calcined solid magnesium oxide is returned to the scrubbing process, and sulfur dioxide which is released with the calcination is then converted into a salable product such as sulfuric acid. 

For the regenerative magnesium oxide scrubbing process, the dominant dissolved species are magnesium sulfite, bisulfite, and sulfate. For this process, chloride and fly ash are removed separately to avoid their accumulation in the main scrubbing loop. For this reason, chloride is not a significant... 

Lowell, P.S. Ottmers, D.M. Strange, T.I. Schwitzgebel, K. De Berry, D.W. "A Theoretical Description of the Limestone Injection-Wet Scrubbing Process" Final Report for EPA Contract No. CPA-22-69-138 with Radian Corporation, 1970. 

The design of the stack was inadequate for the service especially since the scrubbing process introduced solid material into the stack. A good structural or mechanical design does not necessarily ensure suitability for process conditions. The stack should have been reinforced and should have been equipped with some means of minimizing deposits within the inner liner. 

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