Sour water stripper bottoms ammonia concentration

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Online Cleaning technology applied to a major European refinery The vapor stream from the second stage 68 proceeds to the third stage Energy savings from electric capacity control Many oil refineries treat this aqueous waste water by steam stripping the waste water, producing a vapor stream containing water, ammonia and hydrogen sulfide, and feeding this vapor to a sulfur recovery unit SRU. The effect on the NH3 in the stripper bottoms was quite negligible. Chemical processing plants such as oil refineries produce sour water waste that includes ammonia and hydrogen sulfide. Sour water stripper bottoms are reused in two places:

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Although only a few exemplary embodiments of this invention have been described in detail above, those skilled in the art will readily appreciate that many modifications are possible in the exemplary embodiments without materially departing from the novel teachings and advantages of this invention.

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A second or middle stage 68 also includes a packed bed in combination with a second external heat exchanger 72 including a second circulation pump 74 and a second cooling unit Figure 3 shows the essentials of a correct sour water stripper design. Process for sour water treatment. The cooled vapor continues into the second stage where it is further cooled by a weaker ammonium sulfide solution that is cooled through heat exchanger 72 with cooling water. Alternatively, the hydrogen sulfide gas can be purified and used as a raw material for producing desirable chemical products, such as, for example, methionine, mercaptans, hydrosulfides, other sulfides or natural gas odorants. The E-1 feed preheater, reflux pump P-2 and the reflux cooler E-2 shown in Figure 2 are all eliminated.

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