Patent Application
20090056648
(a) Field of the Invention
The present invention is related to a protection system, and more particularly, to one for the protection of a heat transfer oil boiler.
(b) Description of the Prior Art
The purpose of a heat transfer boiler is to deliver the heat through a type of liquid that is capable of withstanding a certain temperature to an installation that needs the heat to operate. Heat transfer oil is the most common heat transfer medium used for the purpose. A regular heat transfer is essentially comprised of a circulation loop including a heating boiler, a heat consumption installation, an oil-gas separator, and an oil circulation pump. Wherein, one end of the air-gas separator is connected to a high-level tank through pipe work; and the high-level tank contains heat transfer oil and provided with a vent. The working principle involves heat transfer oil is supplied to the boiler to flow through the pipe work into the heat consumption installation; then the heat transfer oil flows further through the oil-gas separator, the oil circulation pump to return to the boiler to be heated once again to complete a cycle. The high-level tank in the cycle functions to make up the heat transfer oil within the circulation loop once the density of the heat transfer oil increases due to lowered temperature for cause whatsoever or to take up the excessive amount of heat transfer oil when the temperature of the heat transfer oil rises. In practical application, the construction as described above is found with the problem that the heat transfer oil expands or reduces its volume due to that the temperature of the heat consumption installation or the heating boiler is vulnerable to fluctuation. When the heat transfer oil expands, the heat transfer oil passing through the oil-gas separator flows into the high-level tank to cause the temperature of the high-level tank to rise. As the temperature rises, the high-level tank has to dissipate the heat to result in waste of thermal energy. Meanwhile, the higher temperature means the lower density to force the heat transfer oil floating on the surface and get deteriorated when it reacts with the air as the heat transfer oil passes through the vent. When the heat transfer oil reduces due to lower temperature, the temperature of the heat transfer oil supplemented by the high-level tank is even lower to significantly increase the energy consumption at the heating boiler.
The primary purpose of the present invention is to provide a protection for the heat transfer oil boiler that is capable of fully utilizing the thermal energy in the heat transfer oil, reducing the energy consumption by the heating boiler, and preventing the heat transfer oil from being vulnerable to deterioration.
To achieve the purpose, the present invention adopts a technical option of a protection for the heat transfer oil boiler including a high-level tank disposed with vent and an oil-gas separator connected to the protection with a pipe work; and one or a plurality oil storage unit is connected in series between the high-level tank and the oil-gas separation. The expanded heat transfer oil is preserved by grade through the oil storage unit to make sure that the high-level tank is not vulnerable to temperature rise; that the heat transfer oil in the high-level tank is prevented from getting deteriorated; and that the thermal loss of the heat transfer oil is kept to its minimum.
All the oil inlet pipes to the oil storage unit are disposed in the upper part of a chamber in the oil storage unit; and all the oil outlet pipes from the oil storage unit are disposed in the lower part of the chamber in each oil storage unit so that the heat transfer oil at higher temperature is first supplied to the heat transfer oil heating boiler since it is disposed at the upper part of the oil layer in the oil storage unit.
The oil storage unit is related to a cylindrical and enclosed container with a vent disposed at the top and a drainage pore disposed at the bottom of the oil storage unit. Of course, the oil storage unit may be made in other shape, e.g., square, trapezoid or other regular or irregular geometric form. However, in terms of refractory and total area, the cylindrical shape is preferred.
The vent functions to exhaust the air whenever present in the oil storage unit and the drainage pore functions to drain out the heat transfer oil when it is no longer needed in the oil storage unit.
The oil inlet pipe opening is made in an inverse trapezoid construction and the oil outlet pipe opening is made in a trapezoid construction. The purpose of these two designs for the pipe openings is to slow down the flow rate of the heat transfer oil entering into and leaving the oil storage unit so to facilitate preserving thermal energy.
Three oil storage units are preferred as long as the quantity of the oil storage unit is not less than 1. Field experience proves that three is the appropriate that provides the optimal results, reasonable space consuming and installation convenience.
All the vents each from the oil storage unit are arranged in parallel to form a master exhaustion pipe with its top higher than the oil level in the high-level tank. A gate valve is disposed on the master exhaustion pipe. While maintaining a neat and aesthetic appearance, the communication with the ambient air by the oil storage unit can be controlled by opening up or shutting off the gate valve.
Similarly, all the drainage pores at the bottom of each oil storage unit are arranged in parallel to form a master drainage pipe, and a gate valve is also disposed on the master drainage pipe for easy installation and control while maintaining the aesthetic appearance in general.
The present invention provides its optimal purpose in assuring of keeping the thermal loss of the heat transfer oil flowing into the high-level tank to its minimum and preventing the heat transfer oil from deterioration thus to minimize the energy consumption of the heat transfer oil supplied to the heating boiler.
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