Chemical treatment in petroleum refining processes requires precise, reliable level control to safely and effectively measure media in high temperature, high pressure and caustic environments. Treatment operations in the petroleum refining process include the following level control applications.
Catalytic Hydrotreating treats hydrocarbon liquids in the presence of hydrogen. This process removes 90% of the sulfur, nitrogen, oxygen and metals from feedstocks. Hydrotreating can also provide hydrodearomatization (HDAr), heavy diesel hydrocracking (HDHDC), dewaxing and performance enhancements of pyrolysis gasoline and diesel.
Hydrotreatment will necessitate level indication of liquid/gas separators and water wash tanks. Level devices suited for high temperatures and pressures are essential in removing contaminants that can have detrimental effects on equipment, catalysts and the quality of the finished product.
Point Level: Series 3 FloatActuated External Cage Level Switch or B40 Float-Actuated Level Switch
Continuous Level: E3 Modulevel® Displacer-Actuated Transmitter or Eclipse® Model 706 Guided Wave Radar Transmitter
Visual Indication: Atlas® or Aurora® Magnetic Level Indicators can be supplied with switches or transmitters
CHEMICAL STORAGE AND FEED
From acids to water treatment additives, a wide array of chemicals are stored at a refinery in vessels that range in size from plastic totes to large steel tanks. Chemicals such as sulfuric and hydrochloric acid, sodium hydroxide, liquid catalysts, blending additives and water treatment chemicals are essential to a refinery’s day-to-day operation.
Liquid solution storage and day tanks require stringent level monitoring to ensure ongoing chemical processing. The nature of the chemical, the geometry of the holding vessel and the presence of mixers or other hardware will determine the most suitable level technology for the storage or feed application.
Point Level: Echotel® Models 910, 961 or 962 Ultrasonic Switches or Tuffy® II FloatActuated Switch
Continuous Level: ECLIPSE Model 706 Guided Wave Radar Transmitter with Insulated Single Rod Probe
Visual Indication: ATLAS or AURORA MLIs can be supplied with switches or transmitters