It can also cause spluttering of the flame at the burner tip, possibly extinguishing the flame and reducing the flame temperature or lengthening the flame. Storage of Fuel oil It can be potentially hazardous to store furnace oil in barrels. A better practice is to store it in cylindrical tanks, either above or below the ground.
Furnace oil, that is delivered, may contain dust, water and other contaminants. The sizing of storage tank facility is very important. A recommended storage estimate is to provide for at least 10 days of normal consumption. Industrial heating fuel storage tanks are generally vertical mild steel tanks mounted above ground. It is prudent for safety and environmental reasons to build bund walls around tanks to contain accidental spillages.
As a certain amount of settlement of solids and sludge will occur in tanks over time, cleaning should be carried out at regular intervals-annually for heavy fuels and every two years for light fuels. A little care should be taken when oil is decanted from the tanker to storage tank.
All leaks from joints, flanges and pipelines must be attended at the earliest. Fuel oil should be free from possible contaminants such as dirt, sludge and water before it is fed to the combustion system. Removal of Contaminants Furnace oil arrives at the factory site either in tank lorries by road or by rail. Oil is then decanted into the main storage tank.
To prevent contaminants such as rags, cotton waste, loose nuts or bolts or screws entering the system and damaging the pump, coarse strainer of 10 mesh size not more than 3 holes per linear inch is positioned on the entry pipe to the storage tanks.
Progressively finer strainers should be provided at various points in the oil supply system to filter away finer contaminants such as external dust and dirt, sludge or free carbon. It is advisable to provide these filters in duplicate to enable one filter to be cleaned while oil supply is maintained through the other.
Pumping Heavy fuel oils are best pumped using positive displacement pumps, as they are able to get fuel moving when it is cold.
A circulation gear pump running on LDO should give between hours of service. Diaphragm pumps have a shorter service life, but are easier and less expensive to repair. A centrifugal pump is not recommended, because as the oil viscosity increases, the efficiency of the pump drops sharply and the horsepower required increases. Light fuels are best pumped with centrifugal or turbine pumps. When higher pressures are required, piston or diaphragm pumps should be used.
Storage Temperature and Pumping Temperature The viscosity of furnace oil and LSHS increases with decrease in temperature, which makes it difficult to pump the oil.
At low ambient temperatures below 25o C , furnace oil is not easily pumpable. To circumvent this, preheating of oil is accomplished in two ways: a the entire tank may be preheated. In this form of bulk heating, steam coils are placed at the bottom of the tank, which is fully insulated; b the oil can be heated as it flows out with an outflow heater. To reduce steam requirements, it is advisable to insulate tanks where bulk heating is used.
Bulk heating may be necessary if flow rates are high enough to make outflow heaters of adequate capacity impractical, or when a fuel such as Low Sulphur Heavy Stock LSHS is used. In the case of outflow heating, only the oil, which leaves the tank, is heated to the pumping temperature. The outflow heater is essentially a heat exchanger with steam or electricity as the heating medium. Temperature Control Thermostatic temperature control of the oil is necessary to prevent overheating, especially when oil flow is reduced or stopped.
This is particularly important for electric heaters, since oil may get carbonized when there is no flow and the heater is on. Thermostats should be provided at a region where the oil flows freely into the suction pipe.
The temperature at which oil can readily be pumped depends on the grade of oil being handled. Oil should never be stored at a temperature above that necessary for pumping as this leads to higher energy consumption. Open navigation menu. Close suggestions Search Search. User Settings. Skip carousel. Carousel Previous. Carousel Next. What is Scribd? Explore Ebooks. Bestsellers Editors' Picks All Ebooks. Explore Audiobooks. Bestsellers Editors' Picks All audiobooks.
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Did you find this document useful? Is this content inappropriate? Report this Document. Description: boiler operation. Flag for inappropriate content. Download now. Properties of Liquid Fuel. Related titles. Carousel Previous Carousel Next. Jump to Page. Search inside document. Typical figures are: The main disadvantage of sulphur is the risk of corrosion by sulphuric acid formed during and after combustion, and condensing in cool parts of the chimney or stack, air pre heater and economiser.
Viswanathan Srk. Cana De. Ram Krishna Singh. Drupad Patel. Shubham Khandelwal. Rakheeb Basha. Sapari Vel. Extensive operational testing is essential ultimately, but once fuels of a given type have been proved satisfactory in service, quality can usually be controlled subsequently by means of a few simple laboratory tests.
The tests are also important for general handling safety, customs and excise dues, and so on. Unable to display preview. Download preview PDF. Skip to main content. This service is more advanced with JavaScript available. Advertisement Hide. Basic Properties and Tests of Liquid Fuels. Authors Authors and affiliations E. This is a preview of subscription content, log in to check access. Google Scholar. Annual Book of A. Caines, Modern methods of testing petroleum and its products, Inst.
Usherwood, A new automatic standard distillation apparatus, Petrol. March —7.
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