Catalytic hydrotreating, also known as hydrodesulfurization, 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.
Many countries have passed new regulations about the permitted levels of sulfur in oil products in order to cut down on sulfur dioxide emissions. With these new regulations in place, hydrodesulfurization has become an important part of ensuring petroleum refineries are in compliance with the law and increasing their output of environmentally friendly products.
Magnetrol® has produced an applications brochure for the petroleum refining industry detailing level measurement challenges and solutions for each step of the refining process. This blog post is part of an occasional series describing each application in detail.
Level Measurement Challenges and Considerations
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. Any level instrumentation selected for hydrodesulfurization applications must be able to withstand these challenging process conditions and accurately measure the liquid/gas separation.
Level Measurement Solutions
MAGNETROL has produced level measurement solutions for hydrodesulfurization:
- For point level:
Series 3 float-actuated external cage level switch or B40 float-actuated level switch
- For continuous level:
Eclipse® Model 706 guided wave radar transmitter or E3 Modulevel® displacer-actuated transmitter
- For visual indication:
Atlas or Aurora® magnetic level indicators can be supplied with switches or transmitters