SENTRO Vapor-Phase Chemical Decontamination

Application:

• Chemical injected into steam.
• Minimal changes in operational steam-out procedures.
• Continuous injection of fresh chemicals.
• Continuous monitoring of hydrocarbon / LEL / H2S / Benzene levels.
• De-oiling, degassing & Sulfide oxidation (no Pyrophorics).
• Applicable for Heavy Oil Units such as Atmospheric, Vacuum, Visbreaker, Desalter, etc.
• Applicable for a combination of furnace + tower bottom + overhead system (coolers, accumulator) + pump around / sidecuts, etc.

Advantages:

• Minimizes Down Time
  • Reduces Steam Out Duration.
  • Reduces Maintenance Activity Before and After Decontamination Process.
• Environmentally Friendly
  • Biodegradable.
  • Extremely Low Chemical Oxygen Demand (COD) Waste.
  • Does not make Stable Emulsions.
  • Minimizes the amount of waste generated.
• Effective
  • Penetration and softening of heavy residuals and asphaltenes.
  • Assures chemical contact and reduces the possibility of channeling.
  • Will suspend Coke scale and particulates.
• Efficient
  • Results are equal to a cascade or full circulation but with less effluent volume.
  • Fewer mechanical connections and less maintenance time.

Set-up is simple, fast, and economical:

• Includes barrels, barrel pumps, ½” flexible hoses, and ¾” or 1” injection connections.
• (unlike liquid circulation –this application does not involve a tank, chemical blending, centrifugal pumps, heavy flexible hoses, temporary connections, large effluent volume to be treated, and more..)

SENTRO Liquid-Phase Chemical Decontamination

Application:

• The process is safe and effective
• Removes heavy oil deposits, organic scale, coke, and polymers
• Non-hazardous and non-corrosive chemicals, in water-based chemical solution
• Compatible with the unit’s metallurgy  
• Effluent is biodegradable and non-transport-regulated
• Inline 10 um filtration to capture solid particles
• Chemical solution can be heated by steam or by an external heat source
• Optional low-temperature circulation for limited-temperature applications
• Optional for a solvent-base non-aqueous chemical cleaning in specific applications   
• Optional two-way circulation: direction of the circulation can either be against the process flow or with the process flow

Advantages:

• Environmentally Friendly
  • Biodegradable
  • Low Chemical Oxygen Demand (COD) Waste
  • Does not make Stable Emulsions
• Effective
  • Penetration and softening of heavy residuals and asphaltenes
  • Assures chemical contact and reduces the possibility of channeling
  • Will suspend and remove coke scale and particulates

Optional: Boilout chemical decontamination for vessels

• The vessel is flooded and filled with chemicals and water
• Steam or an external heat source is added to heat the solution and agitate sludge or solids
• Covers all sludge layers and assures chemical contact
• Immediately reduces odor concerns
• Great application for storage vessels, overhead receivers and fuel gas KO drums
• Works well in vessels that have limited Tie-in locations or steam connections
• Allows fewer temperature restrictions

Pre-flush and Post-flash advantages

• Pre Flushing
  • Helps reduce surface tension and remove free solids
  • Penetration and softening of Atmospheric Residue
  • Assures chemical contact of solids in packed sections and dead spots
• Post Flushing
  • Assures chemical saturation and neutralization of pyrophoric in large packed sections
  • Helps to carry out free solids
  • Will rinse out residual chemicals and reduce the odor
  • Oxidized rinse water helps with effluent disposal