From its headquarters in Ratingen, Germany, SCH?FER & URBACH（S&U） has spent more than 80 years building a brand known for its trustworthiness and strong customer focus. As specialists for sophisticated solutions S&U have become renowned in the following areas: Pumps and Pump Units; Water Hydraulics; Tank Cleaning.
Spray cannon – for state-of-art cleaning of product storage tanks
S&U innovative non-man entry tank cleaning system with spray cannon does away with the need for the risky manual cleaning of product storage tanks. Self-contained, with a cleaning lance, a video camera and a lamp, the spray gun is mounted outside the tank next to a cleaning aperture, for easy, automated access to the sludge build-up within. Also included in the container are a pump aggregate, operating and control room, service and hydraulic unit and heat exchanger.
The mobile, automated inside tank cleaning process using the innovative spray cannon is suitable for tanks with a maximum diameter of 40 m. Suitable cleaning media are water or light crude oil.
The spray cannon unit is a highly valuable alternative to the previously common practice of manual cleaning, which involves high safety risks and major physical and mental strain for the personnel.
Unique features-Usable in an explosive atmosphere;
-Large cleaning angle (0 ° to 180 °);
-Horizontally and vertically adjustable;
-Roof- and wall-mountable;
-Easy and safe remote monitoring;
-Low operating costs.
Summary of advantages: -Replaces manual cleaning;
-Minimizes safety hazards;
-No personnel inside the tank;
-Reduces cleaning times.This is how it works: The spray cannon unit comprises a cleaning lance, a video camera and a lamp. It is mounted outside the tank at a cleaning aperture (manhole). It can be swivelled both horizontally and vertically through 180°.
The pump unit is installed inside the container vehicle. The energy for the spray cannon as well as for the operating and control room is supplied by a generator driven by the Diesel engine of the high-pressure pump (it is also possible to connect an external power supply). The hydraulik unit for swivelling the spray cannon is driven in the same way.
The container vehicle provides sufficient space for accommodating the spray cannon and the required cleaning equipment during transport.
The complete cleaning process is controlled and performed from the control room inside the container vehicle. It is also possible to document the cleaning process by storing it on a DVD using the recorder which is part of the standard supply package.
Tank cleaning systems – mobile tank flushing and cleaning vehicle for product storage tanks.
The mobile inside tank cleaning process is designed for small, decentralized storage tanks, e.g. at petrol stations, with maximum diameters of 25 m. The flushing medium is Diesel or hot water. A special cleaning lance cleans the tank without the need for personnel being inside the tank.
Summary of advantages:-No personnel inside the tank;-Avoidance of emissions; -Time savings and high safety standard; -All equipment needed for the tank cleaning operation is integrated into one vehicle.This is how it works: For the cleaning operation, a cleaning lance is installed in the tank using a special manhole cover. While the flushing process is going on, the removed sludge is separated from the cleaning medium. The medium is recirculated back into the flushing cycle.
When the purging operation is complete and the sludge has been removed, the tank can be washed out with hot water. For this, approx. 3 m3 of water are available in two dedicated storage tanks. After ventilating the tank it is ready for being inspected or repaired.
In the case of flammable products the tank is inerted and the atmosphere is monitored online by means of a control station.
The individual assemblies and sub-assemblies (vacuum pump, flushing pump, high-pressure pump, nitrogen generator with air compressor and respiratory equipment, hose reels etc) are all driven by the auxiliary drive of the vehicle and can be inifinitely regulated at the control unit.
For disposing off the tank content or the cleaning medium externally, a 12 m3 container is provided to handle the transport.
Modular tank flushing system – the freely configurable system
The innovative, modular crude oil tank flushing system is designed for cleaning mineral oil tanks with a maximum diamter of 100 m. The cleaning medium is mineral oil.
Depending on the required conditions of use, the individual modules can be configured to form a mineral oil tank purging system.
-Vacuum module;-Pump module;
-Heat exchanger module;
-Service module;
-Control module (optional for automatic mode).
All modules can be:
-individually operated;
-freely configured;
-operated in automatic mode;
-used as mobile units.
Flushing of mineral oil tanks
The flushing of crude oil tanks is performed by a closed system according to ATEX standard (ATEX 95), zone 1. There is no need for any personnel to be inside the tank during flushing. The underlying principle of the process is the dynamic liquefaction of the sludges by injecting heated mineral oil into the inerted tank by means of special lances installed in the sealed tank roof.
Summary of advantages:
-No personnel inside the sealed, inerted tank;-Optimization /Reduction of the gaseous atmosphere for fine cleaning;-Emission of gases is minimized as the system is completely closed;-Waste reduction and crude oil recycling;-Time and cost savings.
This is how it works (sludge liquefying by heated crude oil) :
Before the tank can be emptied for setting the roof into the repair position, it is necessary to remove as many roof support legs as required to accommodate the cleaning lances. When the tank roof is in the repair position, the bottom sludges are measured and the lances installed. Then emptying is continued while the interior of the tank is being inerted.
The cleaning operation requires the availability of crude oil from a second storage tank. The amount of mineral oil required for the sludge removal is sucked out of the second tank, heated up and injected into the tank to be cleaned via the lances. The injected mineral oil and the liquefied bottom sludges are sucked off by a dedicated suction unit and pumped back into the second tank. Special filters prevent inorganic substances such as sand or rust from being pumped into the tank.
After the hydrodynamic cleaning operation, the tank is opened to remove the residual inorganic solids and complete the interior cleaning of the tank.
Cleaning lances – versatility in motion
Cleaning lances according to ATEX 97/23/EG are used for cleaning oil tanks or similar containers. The impinging liquid jet breaks up and loosens the deposited oil sludge, maximizing the amount of recyclable material.
We differentiate between the following 5 cleaning programmes:
-Complete cleaning;
-Spot cleaning;
-Bottom cleaning;
-Roof cleaning;
-Sector cleaning.
Summary of advantages:
-5 adjustable cleaning programmes;
-Nozzle movement is displayed;
-Simple changing between cleaning modes;
-Usable in explosive atmospheres.
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