refinery & terminal storage tanks - mmr corp files/matcor/mmr … · for refinery &...
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“MATCOR” System
Automated Tank Cleaning & Oil Recovery for Refinery & Terminal Storage Tanks
Presented by:
MMR Corporation Pty Ltd
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Sludge Accumulation
Oil storage tanks are used all over the world in refineries, terminals and tank farms for storing oil products.
Tanks are subjected to periodical cleaning operations due to sludge accumulation, inspection and maintenance.
Sludge accumulates due to slow sedimentation of high gravity petroleum products
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Sludge Accumulation
This leads to numerous problems in the management of the depots including:
Loss of operational capacity
Loss of working time
Acceleration of corrosion in the storage tanks.
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Traditional Approach
This entails many challenges during execution involving:
High Health and Safety risks.
High volumes of waste to be disposed of.
Prolonged tank shutdown time
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Innovative Approach
CONCEPT: SLUDGE IS VALUABLE $$$
Our system allows to recover up to 95% of the hydrocarbons present in the sludge while minimizing the volume of final waste to be sent for disposal
System based on:
Hydro-mechanic rotating modules
Novel engineering process
Biotechnological compounds (Bio surfactant)
Energy & heat
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Automated tank cleaning process
Steps:
1.Sludge mapping and characterization (Optional)
2.Cold tapping
3.Installing telescopic jet
4.Circulating
5.Separation
6.Oil recovery & water disposal
7.Solids clean out
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STEP 1 –Sludge mapping and characterization (Optional) Mapping
Thermo graphic, density and viscosity profiles are taken to determine the quantity of sludge
Characterization
Sampling, density & viscosity profiles and analysis of the sludge enable the optimal tank cleaning strategy to be developed.
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STEP 2 –Cold tapping
Without opening the tank, several bolts are removed from the lateral man-way, leaving 8 bolts in place.
The manhole adaptor, with a gasket, is placed over the man way and bolted down. The adaptor has 8 larger holes to fit the man-way plate bolts.
Two side valves (10” and 6”) and one 16” (front) valves are installed on the adaptor. The valves are closed and the assembly is pressure tested
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STEP 2 –Cold tapping
Without taking the tank out of service, a cold tapping device is used to cut penetration in the man-way
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STEP 3 –Installing telescopic jet
The cold tapping device is removed and replaced by the telescopic jet. The tank remains in service throughout this operation.
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STEP 4 –Circulating Circulation system
The position of the jetting tool is controlled hydraulically or manually.
The range of the jetting tool is: •+/-20°vertically 180°horizontally
The washing and dilution effect of fresh crude oil or other suitable distillate is used at a ratio of 2:1 to 3:1 (depending on the sludge quantity)
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Step 5 -Separation
Bio surfactant action:
allows oil, fats and hydrocarbons to disperse into water through reduction of surface and interfacial tension
A temporary stable emulsion is formed which afterwards breaks allowing the hydrocarbons, water and solids to separate in layers
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Step 5 -Separation At the end of the circulation, or more if necessary, the oil and water are separated from the solid phase.
Sludge consisting of sand and gravel mixed with oil and water Oil Sludge now has up to 95% of the hydrocarbons removed and returned to the oil phase. Water Separation Sludge Solids Hydrocarbon can be recovered from the 10” valve Water can be reused or sent to the water treatment plan
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STEP 6 –Oil recovery & water disposal
After circulation and separation, the content of the tank is pumped out.
The oil phase can be pumped directly to the desired location.
The recovered oil quality is continuously monitored by a mobile lab
The water phase is pumped back to the waste water tank or different designed location.
Also the water quality is monitored in the mobile lab
The bio surfactant has not detrimental effect on the oil quality and environment
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STEP 7 –Solids clean out Option 1 -Desludging If the objective of cleaning is to recover the valuable
storage capacity in the tank and there is no need to remove the remaining small amount of solids, the tank can be put back in service.
Option 2 –with final cleaning If cleaning is for tank maintenance or inspection then, degassing and final clean out of the tank is required.
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STEP 7 –Solids clean out
By pumping warm water through the telescopic jet, the final washing takes place without opening and entering the tank.
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Advantages
Principal advantages of the automated tank cleaning system are:
tank downtime minimized as remains in service during the desludging phase
Up to 95% of all hydrocarbons are recovered from the sludge
Minimization of the final waste to be disposed
High QHSE standards: no man operation on the roof of the tank and minimal confined space entry.
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Other Advantages
no need for secondary tank
no need of oil batches; the product inside the tank can be used to dissolve the sludge
process can be applied whichever is the sludge level and the oil level without extra cost and extra time
no need to remove the legs or to tap the roof
no need to use nitrogen for inertization
uniform landing of the floating roof avoids mechanical troubles
mechanical modules can be left installed for future cleaning operations and to prevent sludge accumulation
zero emission of VOC’ s during all operations
closed tank degassing without emissions in atmosphere
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Case Study # 1
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Case Study # 2
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Case Study # 3
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Key Product and Services
LECS VOC Control® Volatile Organic Compounds Emission Control
Technology to eliminate odour and explosion risk while handling and storing hydrocarbon product.
Used in refineries, petrochemicals plants, fuel deposits, open pits and tanks with floating roofs (mainly).
The system is based on the spraying of the diluted chemicals in water.
The system uses chelating agents to capture the volatiles and microorganisms , supported by the bio surfactant agent, degrade them.
The waste water from this process, can be easily treated in a urban sewage plant.
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QUESTIONS ?