TANK CLEANING

CEDA offers the newly designed hydrocarbon recovery and waste minimization program, which uses a unique warm water circulation technique to efficiently clean crude storage tanks of sludge with minimal deposits. CEDA’s specially designed directional manways are brought into the tank, along with a pump, heat exchanger, flow meter and temporary pipe. Water and diluents are pumped into the tank on top of the sludge and chemicals are added as required.

The contents are then circulated and heated, which causes hydrocarbons in the sludge to break their chemical bond and mix with the diluents that rises through the water to mix with the crude on the surface. The remaining sediment settles at the bottom of the tank. Hydrocarbon and inorganic separation may take from 7 to 10 days while simultaneously heat and circulation in the tank will combine to liberate and drive off the major concentrations of H2S and benzene as the cleaning progresses.

The bulk of the hydrocarbon and diluents is pumped out. The water level is lowered to allow for our final skimming process, which will remove the remaining hydrocarbons from the surface, leaving behind water and less than 2% of the original sludge volume, which is made up of inorganic, nonreclaimable material.

The incentives to use this process are:

• All remaining materials typically meet in house land farm criteria.
• RCRA legislation compliance issues are resolved.
• Hydrocarbon recovery reaches 95%.
• Reduced disposal, maintenance and labor costs.
• Valuable crude oil recovery.

We also supply a similar procedure to asphalt tanks.

 

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