Sour water stripping

Sour water is to be routed to sour water stripping facilities. 

The conference was subdivided into four sessions, and chapters within this text are arranged according to these categories. Papers included in the first section (Thermodynamics of Electrolytes for Pollution Control) provide the reader with insights into the practical aspects of pollution control, as well as an overall appreciation of applied electrolyte phase equilibria. Other chapters include detailed descriptions of thermodynamic models that recently have been developed to describe important industrial pollution control processes with emphasis on acid gas absorption/sour water stripping and flue gas desulfurization. 

A number of models have been developed to describe the chemistry occurring in sour-water stripping and absorption. 

The first step in good pretreatment practice is the segregation of major wastewater streams. This frequently simplifies waste treating problems as well as reducing treatment facility costs. Treatment at the source is also helpful in recovering byproducts that otherwise would not be economically recovered from combined wastes downstream [35]. Four major pretreatment processes that are applicable to individual process effluents or groups of effluents within a refinery are sour water stripping, spent caustics treatment, ballast water separation, and slop oil recovery. These are discussed below. 

Sour-Water System Improvements Sour water is the most likely source of Refinery odor problems. Follow-up on projects previously identified by Linnhoff-March engineering to reduce sour water production, and improve sour water stripping. 

The phase equilibrium equations for the interface may also need to be modified for the influence of additional species on the thermodynamic properties at the interface. A case in point is sour water stripping, in which reactions in the liquid phase create additional species (including ions), which affect the interfadal equilibrium. Enhancement factors have been derived for many cases and there is no sin-... 

For stripping ammonia from sour water stripping steam 1 kg/kg feed. 35 theoretical trays. 

In general, the in-plant control methods employed by the industry (sour-water stripping, spent-caustic neutralization and oxidation, slop oil recovery, etc.) will determine the final effluent characteristics and the level of pretreatment required for discharge to the municipal collection system. The following specific in-plant practices are frequently employed ... 

The pretreatment unit operations which may be necessary for various types of treatment facilities are shown in Table 12. The most prevalent in-plant treatment methods are sour-water stripping, neutralization and oxidation of spent caustics, ballast water treatment, and slop-oil recovery. These measures substantially reduce the waste loadings and to a significant degree are required to protect subsequent treatment. In addition to these in-plant control methods, refineries use gravity oil separators to recover free oil from process effluents. 

Corrosion of materials in sour water stripping operations involves complex mixtures of sulfides, cyanides, carbonates, and chlorides. Corrosion control is by alloy selection. 

Types of Processes, 296 Water Scrubbing, 297 Sour Water Stripping Process, 302 Ammonium Salt Production, 308 Phosam and Phosam-W Processes, 311 Chevron WWT Process, 314... 

Trends in the design of sour water stripping systems as noted by Won (1982) include... 

NAME COMPMIENf SOUR WATER STRIPPED WATER... 

The API-sponsored survey of more than 80 sour water stripping operations found that the Beychok calculation model correlates satisfactorily with observed results down to an anuno-... 

In each case, the unspecified temperature, pressure, and composition will be calculated. The pH can also be calculated, or a specified pH can be imposed on the calculation in which case the required amount of caustic will be calculated. The GPSWAT model is useful in predicting the composition of sour water that will result from a high pressure gas/water contact or in designing a sour water stripping system using either manual or computerized column design techniques. 

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