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Automatic tank cleaning.Effi cient systems. Safe management.
CAW_AG_211_TB_Tankreinigung_RZ_GB_2.indd 1CAW_AG_211_TB_Tankreinigung_RZ_GB_2.indd 1 11.03.2008 10:26:44 Uhr11.03.2008 10:26:44 Uhr
Our background: No. 1 worldwide in environ-mental services.
Veolia Environmental Services, we are part of Veolia Envi-
ronment, the world’s leading company for environmental
services in the fi eld of water, disposal services, energy op-
timisation and transport. We have almost 300,000 Veolia
employees operating in more than 67 countries with know-
how, a high degree of technical expertise and with passion
for the preservation of existing resources and their environ-
mentally compatible utilisation. Veolia Environmental Ser-
vices off er a complete service for all disposal and environ-
mental problems. Our customer orientation is proven daily
by our delivery of reliable services on schedule using the
latest technology. Furthermore, our high effi ciency and fl exi-
bility guarantee a competitive price- performance ratio.
A state-of-the-art installation and setup.
For all types of industrial cleaning we often have processes
developed in-house and the latest machinery and vehicles,
in order to meet the highest safety and technical require-
ments. At the same time, we never lose sight of economic
effi ciency as the core of our customer orientation, speed
and an outstanding price performance ratio characterise
our service. Our personnel are passionate team players, com-
petent, quality aware and thorough in their compliance
with all directives and guidelines in the fi eld of environ-
mental protection and occupational health and safety.
Versatility: always from a single source.
Our inter-group experience enables us to off er a compre-
hensive range of services. This includes very individual
requirements. We know the situation on the ground and
as a powerhouse of innovation we develop technological,
modern solutions to meet your present and future requi-
rements. See for yourself how we carry out modern tank
cleaning …
2 Tank cleaning 3Tank cleaning
Innovative processes modernise industry.
This includes tank cleaning technology.
The optimum performance capability of in-
dustrial systems lies in the globalised manage-
ment of the decisive competitive advantage.
Unnecessary shutdown times, process faults
or complications arising from environmental
legislation must be precluded. In the search for
outsourcing partners for services, trust in the
technological expertise, experience and qualifi cations of personnel and the readiness
of operating teams to cooperate comes fi rst. For cleaning storage and crude oil tanks,
Veolia Environmental Services off ers the ideal systems.
CAW_AG_211_TB_Tankreinigung_RZ_GB_2.indd 2-3CAW_AG_211_TB_Tankreinigung_RZ_GB_2.indd 2-3 11.03.2008 10:26:53 Uhr11.03.2008 10:26:53 Uhr
4 Tank cleaning
Make way for the cleaning cannon.
The Manway Cannon forms a unit consisting of a cleaning
nozzle, video camera and searchlight, mounted in a cleaning
opening of the tank. Controlled from a mobile control room
with a self-suffi cient energy supply, the fl exible cleaning
cannon can fl ush out any point in the tank with water or
some other medium.
A hydraulic pump generates the required pressure.
Automated or joystick-controlled: the operator has it in full view.
In the mobile control room, the cleaning process is mo-
nitored on several monitors and is digitally recorded and
documented. The camera and cleaning cannon perform
their tasks either automatically using special software
or under the manual control of the operator. If there are
ignitable residual products, the inside of the tank is iner-
ted and the atmosphere is monitored by an online analy-
sis station. If the maximum limit value is exceeded, the
cleaning system automatically shuts down. Residual gas
can be fed back to the tank through a cushion gas line
when vacuuming out the cleaning residue.
The technology:
• The system meets the requirements of the Machinery
Directive and of RL 94 / 9/ EC: Explosion Protection Directive
(ATEX 95) Zone 1 with respect to explosion protection:
• Flushing pressure up to 20 bar at 950 l / min.
• Online analysis station with infrared measuring techno-
logy for continuous monitoring of the gas atmosphere in
the tank
An overview of the advantages:
• Cleaning in a sealed system
• No direct exposure use of a cleaning team in the tank
• Time saving combined with a high standard of safety.
• Avoidance of emissions.
• Automation and documentation
Manway CannonRemotely controlled automated tank interior cleaning.
The manual removal of dirt and residue from inside tanks using cleaning teams wearing
protective clothing and breathing apparatus belongs in the past. This was physically
and mentally stressful for the workers, time-intensive and by no means free of safety
risks. The Manway Cannon method developed by us is the safest, most environmen-
tally friendly solution for the internal cleaning of storage or crude oil tanks of any size.
Tank cleaning 5
Sedimentation tank 1
Vacuum tanker
Vacuum pump
Mobile control room
Water from fi re service hydrants
Sedimentation tank2
Nitrogen (N2)
CAW_AG_211_TB_Tankreinigung_RZ_GB_2.indd 4-5CAW_AG_211_TB_Tankreinigung_RZ_GB_2.indd 4-5 11.03.2008 10:27:22 Uhr11.03.2008 10:27:22 Uhr
7Tank cleaning6 Tank cleaning
How it’s done: Sludge dissolution using heated crude oil.
COWS automatic cleaning is achieved with the roof landed
in the maintenance position. Before the tank is emptied,
the sludge is mapped.
The pneumatically driven injectors are positioned inside
the tank through the roof leg supports.
The tank is sealed, emptied and inerted before the washing
operation.
A supply tank is needed to provide fresh crude oil, it is pre-
heated and pumped out to the injectors in the washing
tank. During this phase solids are controlled by encoura-
ging sedimentation using the tank as a decanter. The crude
oil and the valuable recovered hydrocarbons (dissolved sludge)
are vacuumed out by the COWS unit and transferred back
to the supply tank.
A fi nal circulation with gas oil is undertaken to complete
the dissolution of the sludge, to maximise hydrodynamic
cleaning of the roof, wall and fl oor.
The supply tank is kept under refi nery specifi cations thanks
to dedicated fi lters. Continuous fi ltration eliminates inor-
ganic compounds such as sand, rusts, paintings etc.
The supply tank can be operated during cleaning operations.
When the automatic cleaning is fi nished (controlled with
regular mapping) operators enter the tank to remove the
few remaining inorganic solids and complete the internal
clean.
An overview of the advantages:
• No personnel in the sealed, inerted tank
• Optimisation / reduction of the gas atmosphere for fi ne
cleaning
• Minimisation of the gas emissions by means of the
sealed system
• Reduction of waste and recovery of crude
• Time and cost saving
Our COWS (crude oil washing system) method is also carried out
in a sealed system to ATEX standard (ATEX 95), Zone 1 and renders the
use of personnel inside the tank during cleaning superfl uous.
The basic principle is dynamic sludge dissolution using heated crude oil, with
the heated crude oil being introduced into the inerted tank through special nozzles
in the sealed roof.
COWS Crude oil washing system
CAW_AG_211_TB_Tankreinigung_RZ_GB_2.indd 6-7CAW_AG_211_TB_Tankreinigung_RZ_GB_2.indd 6-7 11.03.2008 10:27:43 Uhr11.03.2008 10:27:43 Uhr
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managing resources:
www.veolia.co.uk
Refi nery ProjectsVeolia Environmental Services (UK) PlcDock Road South, Bromborough, Wirral Cheshire CH62 4SQtel: +44(0)151 644 4300fax: +44(0)151 644 4301
e-mail: [email protected]
Veolia Umweltservice Industrie-Reinigung GmbH & Co. KGKruppstraße 941540 DormagenTel. +49(0)2133 264-0Fax +49(0)2133 264-120
E-Mail: [email protected]
CAW_AG_211_TB_Tankreinigung_RZ_GB_2.indd 8CAW_AG_211_TB_Tankreinigung_RZ_GB_2.indd 8 11.03.2008 10:39:01 Uhr11.03.2008 10:39:01 Uhr