Sour water stripper

Sour Water is the wastewater that is produced from atmospheric and vacuum crude columns at refineries. Hydrogen sulfide and ammonia are typical components in sour water that need to be removed before the water can be reused elsewhere in the plant. Removal of these components is done by sending the sour water from the process to a stripping tower where heat, in the form of steam, is applied. The ammonia and hydrogen sulfide contained in the water is released by the heat and exits the top of the tower. The ideal pH value for stripping H 2 S is below 5, since above 5, sulfide is primarily found in the form of ions HS - or S
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Sour Water Stripper Process

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Sour Water Stripper Process | Yokogawa Electric Corporation

Fouling Control Nalco Champion fouling control programs use dispersants, scale inhibitors and surface cleaning products to reduce the deposition of organics, calcium salts and corrosion byproducts. Controlling fouling in the SWS helps ensure stripping efficiency; in extreme cases, poor SWS operation can impact the whole refinery. Corrosion Control The tower and the overhead sections are exposed to high levels of H 2 S, CO 2 and ammonia and can experience high rates of bisulphide and carbon dioxide corrosion. In some cases, corrosion risks are compounded by high levels of cyanides from upstream units that concentrate in the overhead.
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Sour Water Stripping (SWS)

Sour Water is the wastewater that is produced from atmospheric and vacuum crude columns at refineries. Hydrogen sulfide and ammonia are typical components in sour water that need to be removed before the water can be reused elsewhere in the plant. Removal of these components is done by sending the sour water from the process to a stripping tower where heat, in the form of steam, is applied. The ammonia and hydrogen sulfide contained in the water is released by the heat and exits the top of the tower.
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Sour water stripping is used to remove ammonia NH3 and hydrogen sulfide H2S from sour water streams coming from many unit operations to condition it for discharge or reuse within the refinery. In a complex refinery, most of the sour water comes from distillation, fluid catalytic cracking, catalytic reforming, coker and acid gas removal units, with many other operations contributing to the balance. The different streams are collected in a surge tank for centralized processing via a heat exchanger and a single stripper column, or two in series.
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