JP5808263B2 - Heating device - Google Patents

Description

  Embodiments described herein relate generally to a heating device.

  Thermal turbines and nuclear turbines are provided with an EHC high-pressure oil pressure generator for driving a steam valve. This apparatus uses EHC oil (operating oil for electro-hydraulic control device) such as phosphate ester straight oil. During normal operation, this oil is always controlled and adjusted so as to have an appropriate property and temperature by devices such as a heating pump, a space fan heater, and an oil cooler.

  Since the EHC oil may change its properties with use and affect the operation of the equipment, sampling management is also performed during plant operation. The deteriorated oil is conventionally replaced with new oil when stopped. Old oil has been discarded and stored. However, in recent years, it has been required to reduce the amount of waste for environmental measures, and at the time of periodic inspections of the turbine, oil cleaning is required so that the water content and total acid value in the oil can be restored to normal values and reused. (Oil conditioning) is performed. For oil cleaning, a temporary oil storage tank is used separately from the main oil tank.

  When the oil cleaning process is performed at a low temperature, the oil has a high viscosity, and the processing efficiency of the oil cleaning deteriorates. Specifically, it is not easy to perform filtration efficiently. For this reason, in order to reduce the viscosity of oil, oil is heated. For example, heating is performed using a heat source such as a throw-in heater, a lamp, and steam (see, for example, Patent Document 1).

JP 10-318491 A

  When using oil that is in direct contact with oil, such as a throw-in heater, when the oil is heated, the oil locally becomes hot, and the oil may deteriorate. Further, when a part of the tank is opened and charged, other foreign matters may be mixed into the oil.

  On the other hand, when the heat source is not in direct contact with oil, such as when heating with a lamp or when steam is passed through a pipe, it may take a long time to reach an appropriate temperature. Further, in this case, another facility such as a piping facility or an incidental facility is required, which increases the cost. Therefore, it is not appropriate to install in a temporary tank.

  From the above circumstances, it is not easy to efficiently heat the oil.

  Therefore, the problem to be solved by the present invention is to provide a heating device that can efficiently heat oil.

  The heating device according to the embodiment is a heating device that heats oil contained in an oil storage tank, and includes a plate-like semiconductor heat exchange element as a heat source, and a heating surface outside the oil storage tank. A panel type heater is installed so that it contacts.

  ADVANTAGE OF THE INVENTION According to this invention, the heating apparatus which can heat oil efficiently can be provided.

Drawing 1 is a front view showing the important section of the warming device concerning a 1st embodiment. FIG. 2 is a cross-sectional view showing a main part of the panel heater according to the first embodiment. FIG. 3 is a diagram illustrating a state of installation of the panel heater according to the first embodiment. FIG. 4 is a conceptual diagram showing an oil storage tank according to the first embodiment. FIG. 5 is a side view showing a method for installing the panel heater according to the first embodiment. FIG. 6 is a diagram illustrating a cable used when power is supplied to the panel heater according to the first embodiment. FIG. 7 is a view showing another modification example regarding the installation and connection of the panel heater according to the first embodiment. FIG. 8 is a view showing another modification example regarding the installation and connection of the panel heater according to the first embodiment. FIG. 9 is a front view showing a panel heater according to the second embodiment. FIG. 10 is a side view illustrating a method for installing the panel heater according to the third embodiment. FIG. 11 is a perspective view showing a heating device according to the fourth embodiment.

  Embodiments will be described with reference to the drawings.

<First Embodiment>
[A] Configuration of Heating Device FIG. 1 is a front view showing a main part of the heating device according to the first embodiment.

  The heating device includes a panel heater 10 as shown in FIG. The panel heater 10 includes a housing 11, a handle 12, a power connector 13, and a mounting portion 21, and the handle 12 and the power connector 13 are provided on the front surface of the housing 11. And the attachment part 21 is provided in each of the upper part of the housing | casing 11, and the lower part. Each member is formed of a material having oil resistance.

  FIG. 2 is a cross-sectional view showing a main part of the panel heater 10 according to the first embodiment. FIG. 2 shows an enlarged cross section at the end of the panel heater 10.

  As shown in FIG. 2, the panel heater 10 includes a housing 11, a semiconductor heat exchange element 31, an insulating waterproof material 41, a first heat insulating material 51, a second heat insulating material 52, and a third heat insulating material 53. And have. As will be described in detail later, the panel heater 10 is installed so that the heating surface 11H is in contact with the outside of the oil storage tank (not shown in FIG. 2), and the oil storage tank is directly heated to provide an interior of the oil storage tank. Warm up the oil contained in

  As shown in FIG. 2, the housing 11 includes an accommodating portion 11A and a cover portion 11B. Each of the accommodating part 11A and the cover part 11B is formed using, for example, aluminum. The accommodating portion 11A sequentially accommodates the semiconductor heat exchange element 31, the insulating waterproof material 41, and the first heat insulating material 51 from the heating surface 11H side to the back surface 11R side in the internal accommodation space. And the cover part 11B is installed in 11 A of accommodating parts so that the accommodating space of 11 A of accommodating parts may be covered. Between the accommodating part 11A and the cover part 11B, it installs so that the 2nd heat insulating material 52 and the 3rd heat insulating material 53 may interpose.

  The semiconductor heat exchange element 31 is built in the housing 11 as shown in FIG. The semiconductor heat exchange element 31 is installed so as to cover the heating surface 11H of the housing 11. The semiconductor heat exchange element 31 has a planar heat generation portion, and heat from the semiconductor heat exchange element 31 is transmitted to the entire heating surface 11H. The semiconductor heat exchange element 31 is, for example, a german heater (registered trademark), and is formed so as to generate heat to a desired temperature with a desired power source by appropriately selecting the constituent components. German heater (registered trademark) is a thin plate-like semiconductor having flexibility, and a heat generating portion is covered with a resin film. Germa heater (registered trademark) can use a wide range of power supplies regardless of the polarity of direct current or alternating current, has flexibility, and is easy to apply and cut. Further, it is possible to efficiently heat with a small amount of electric power, and the temperature rise rate is fast, and a constant temperature can be stably maintained. Furthermore, since it is a non-combustible material, high safety can be realized. As the semiconductor heat exchange element 31, for example, one having a maximum temperature of 100 ° C. is used.

  As shown in FIG. 2, the insulating waterproof material 41 is provided so as to cover the semiconductor heat exchange element 31 in the housing portion 11 </ b> A of the housing 11. The insulating waterproof material 41 is an insulating material such as a resin and prevents moisture from entering the semiconductor heat exchange element 31.

  As shown in FIG. 2, the first heat insulating material 51 is provided so as to cover the insulating waterproof material 41 in the housing portion 11 </ b> A of the housing 11. The first heat insulating material 51 is formed of an oil-resistant heat insulating material, and insulates heat toward the back surface 11R side so that heat of the semiconductor heat exchange element 31 is not transmitted to the back surface 11R side.

  Each of the second heat insulating material 52 and the third heat insulating material 53 is interposed between the accommodating portion 11A and the cover portion 11B as shown in FIG. Similar to the first heat insulating material 51, the second heat insulating material 52 and the third heat insulating material 53 are formed of an oil-resistant heat insulating material, and transfer heat from between the housing portion 11A and the cover portion 11B to the outside. Insulated. Here, the second heat insulating material 52 is interposed between the side portion standing from the heating surface 11H so as to surround the accommodation space in the accommodation portion 11A and the side portion of the cover portion 11B. The 3rd heat insulating material 53 is interposed between the part which faces the cover part 11B in the side part of the accommodating part 11A, and the edge part of the cover part 11B.

[B] Installation / Connection of Panel Heater 10 FIG. 3 is a perspective view showing a state of installation of the panel heater 10 according to the first embodiment.

  As shown in FIG. 3, the panel heater 10 is installed on the outer surface of the oil storage tank 101. For example, a plurality of panel heaters 10 are installed on the side surface of one oil storage tank 101.

  FIG. 4 is a conceptual diagram showing the oil storage tank 101 according to the first embodiment.

  As shown in FIG. 4, the oil storage tank 101 contains oil therein. The oil stored in the oil storage tank 101 is purified by being circulated by an oil cleaning device 201 provided outside the oil storage tank 101.

  As shown in FIG. 4, the oil cleaning device 201 includes a total acid number removal filter 211, a circulation pump 212, and a moisture removal filter 213, and is connected to the oil storage tank 101 via a pipe H. In the oil cleaning device 201, oil is received from the oil storage tank 101 via the pipe H by driving the circulation pump 212. Then, the water and the total acid value are removed by the total acid value removal filter 211 and the water removal filter 213, and the oil is returned to the oil storage tank 101 via the pipe H. This operation is repeated until the value falls within the control value, and circulation operation is performed.

  FIG. 5 is a side view showing an installation method of the panel heater 10 according to the first embodiment.

  As shown in FIG. 5, in the panel heater 10, the attachment portions 21 are installed on each of the upper side surface and the lower side surface of the housing 11. Each of the attachment portions 21 is provided with a magnet.

  On the other hand, an attachment base plate 22 is installed on the side surface of the oil storage tank 101 to which the panel heater 10 is attached, as shown in FIG. The mounting base plate 22 is a magnetic body, and is attached to the oil storage tank 101 using an adhesive member such as an adhesive tape.

  When the panel heater 10 is attached to the side surface of the oil storage tank 101, as shown in FIG. 5, the operator holds the handle 12 so that the heating surface 11 H of the panel heater 10 faces the side surface of the oil storage tank 101. At this time, the panel heater 10 is aligned so that the mounting portion 21 of the panel heater 10 and the mounting base plate 22 installed on the side surface of the oil storage tank 101 face each other. Then, from that state, the attachment portion 21 and the attachment base plate 22 are brought close to each other and brought into contact with each other. Thereby, both the panel heater 10 and the oil storage tank 101 are fixed by magnetic force.

  FIG. 6 is a diagram illustrating a cable used when power is supplied to the panel heater 10 according to the first embodiment.

  When power is supplied to the panel heater 10 installed in the oil storage tank 101, a power input cable 61 is used as shown in FIG. Then, as shown in FIG. 4, when a plurality of panel heaters 10 are installed on the side surface of one oil storage tank 101, in order to electrically connect each of the plurality of panel heaters 10, As shown in FIG. 6B, a power connection cable 62 is used. The power input cable 61 and the power connection cable 62 are used by being connected to the power connector 13 shown in FIG.

  Note that the installation and connection of the panel heater 10 is not limited to the above-described example.

  7 and 8 are front views showing other modified examples regarding the installation and connection of the panel heater 10 according to the first embodiment.

  As shown in FIG. 7, a plurality of panel heaters 10 having different sizes may be installed on the side surface of one oil storage tank 101 instead of the same size. Also in this case, the power input cable 61 is connected to the power connector 13 of one panel heater 10 as described above. And between each of the several panel type heaters 10 is electrically connected using the power connection cable 62. FIG. The number of connected panel heaters 10 can be set as appropriate in consideration of the capacity of the main power source.

  In addition, as shown in FIG. 8, a voltage regulator 81 may be installed between the panel heater 10 and the power input cable 61. Thereby, the temperature of the panel heater 10 can be adjusted by adjusting the voltage using the voltage regulator 81.

[C] Summary As described above, in the present embodiment, the heating device includes the panel heater 10 and heats the oil stored in the oil storage tank 101 using the panel heater 10. . Here, the panel heater 10 includes a sheet-like semiconductor heat exchange element 31 and is installed so that the heating surface 11H is in contact with the outside of the oil storage tank 101. Thus, in this embodiment, since oil is heated from the outer side of the oil storage tank 101, oil does not become high temperature locally and it can prevent that oil deteriorates. In addition to warming, the oil storage tank 101 itself is kept warm, so that the oil can be efficiently brought to a desired temperature. Further, since the heat source does not come into direct contact with the oil, no foreign matter is mixed into the oil. And since the sheet-like semiconductor heat exchange element 31 is heated not by a linear heat source but by the two-dimensional heating surface 11H, it can be efficiently set to an appropriate temperature in a short time. Moreover, in this embodiment, another installations, such as piping installation and incidental installation, are unnecessary, and a cost increase can be reduced. In addition, the heating device of the present embodiment has a simple configuration and does not require the skill of personnel to be used, and is suitable with little deterioration over time.

  In the present embodiment, the panel heater 10 includes a housing 11 that houses the semiconductor heat exchange element 31, and is installed outside the oil storage tank 101 via the housing 11. For this reason, the housing | casing 11 can prevent that the members accommodated, such as the semiconductor heat exchange element 31, are damaged.

  In the present embodiment, the panel heater 10 is covered with heat insulating materials 51, 52, and 53 on a surface other than the heating surface 11H. For this reason, it can reduce that the heat by the semiconductor heat exchange element 31 is radiated | emitted from the back surface and side surfaces other than the heating surface 11H closely_contact | adhered to the oil storage tank 101 in the panel type heater 10, and can improve heating efficiency. In addition, it is possible to prevent burns from occurring during handling, and to increase safety.

  In the present embodiment, the panel heater 10 has a casing 11 made of aluminum. For this reason, the heat conductivity of the heating surface 11H is high, and the heating efficiency can be improved. In addition, the processability is good, painting is unnecessary, and weight reduction can be realized.

  In the present embodiment, a plurality of panel heaters 10 are installed in the oil storage tank 101, and each of the plurality of panel heaters 10 is electrically connected by a power connection cable 62. Each of the plurality of panel heaters 10 is supplied with power supplied from the power input cable 61 via the power connection cable 62. Thus, since the power input cable 61 and the power connection cable 62 are used separately from the panel heater 10, the configuration of the panel heater 10 can be simplified. Further, since the order of attaching the plurality of panel heaters 10 can be set freely, it can be easily installed in other different oil storage tanks.

  In the present embodiment, the panel heater 10 is detachable from the oil storage tank 101. For this reason, it is possible to apply and install the same panel type heater 10 in other different oil storage tanks 101 when desired. Here, the panel heater 10 is detachably installed in the oil storage tank 101 by a magnetic force. For this reason, the oil storage tank 101 does not need to be drilled or welded, so that the installation work is easy.

Second Embodiment
[A] Configuration FIG. 9 is a front view showing the panel heater 10b according to the second embodiment.

  As shown in FIG. 9, the heating device of the present embodiment further includes a thermostat 71. The present embodiment is the same as that of the first embodiment except for this point and points related thereto. For this reason, in this embodiment, the description which overlaps with this embodiment is abbreviate | omitted suitably.

  The thermostat 71 is provided inside the housing 11 as shown in FIG. The thermostat 71 is electrically connected to the wiring 72 inside the housing 11. The thermostat 71 controls the operation of the semiconductor heat exchange element 31 so that the set temperature is reached. Here, the set temperature of the thermostat 71 is set to be higher than the required temperature set for the oil. The thermostat 71 controls the operation of the semiconductor heat exchange element 31 so as to be turned on at 60 ° C. and turned off at 70 ° C., for example.

[B] Summary As described above, in the present embodiment, the thermostat 71 controls the operation of the semiconductor heat exchange element 31 so that the set temperature is set to be higher than the required temperature of oil. For this reason, it is possible to heat with high efficiency.

<Third Embodiment>
[A] Configuration FIG. 10 is a side view showing an installation method of the panel heater 10 according to the third embodiment.

  In this embodiment, as shown in FIG. The present embodiment is the same as that of the first embodiment except for this point and points related thereto. For this reason, in this embodiment, the description which overlaps with this embodiment is abbreviate | omitted suitably.

  As shown in FIG. 10, a heat transfer body 91 is provided on the heating surface 11 </ b> R of the panel heater 10. Here, the heat transfer body 91 is in the form of a sheet or paste. For example, the heat transfer body 91 is a metal foil and has a higher thermal conductivity than air.

  When the panel heater 10 is attached to the side surface of the oil storage tank 101, as shown in FIG. 10, the heating surface 11 </ b> H provided with the heat transfer body 91 in the panel heater 10 faces the side surface of the oil storage tank 101. As in the case of the first embodiment, the panel heater 10 is aligned so that the mounting portion 21 of the panel heater 10 and the mounting base plate 22 installed on the side surface of the oil storage tank 101 face each other. In the state, the attachment part 21 and the attachment base plate 22 are brought close to each other and brought into contact with each other. Thereby, both the panel heater 10 and the oil storage tank 101 are fixed by magnetic force.

[B] Summary As described above, in the present embodiment, the panel heater 10 is installed in the oil storage tank 101 such that the heat transfer body 91 is interposed between the heating surface 11H and the oil storage tank 101. For this reason, the adhesion between the heating surface 11H and the oil storage tank 101 is enhanced, and heat is efficiently transferred from the heating surface 11H to the oil storage tank 101. Therefore, in this embodiment, the heating efficiency can be further improved.

<Fourth embodiment>
[A] Configuration FIG. 11 is a perspective view showing a heating device according to a fourth embodiment.

  In the present embodiment, as shown in FIG. 11, a semiconductor heat exchange element 31 d and a heat insulating material 510 are provided in a pipe H (oil passage portion). The present embodiment is the same as that of the first embodiment except for this point and points related thereto. For this reason, in this embodiment, the description which overlaps with this embodiment is abbreviate | omitted suitably.

  As shown in FIG. 11, the semiconductor heat exchange element 31 d has a sheet shape, is wound around the outer peripheral surface of the pipe H in a spiral shape, and heats the pipe H. As this semiconductor heat exchange element 31d, for example, a german heater (registered trademark) is used as in the first embodiment.

  As shown in FIG. 11, the heat insulating material 510 is provided so as to cover the outer peripheral surface of the pipe H around which the semiconductor heat exchange element 31d is wound. The heat insulating material 510 is made of glass fiber, for example.

[B] Summary As described above, in the present embodiment, the semiconductor heat exchange element 31d is wound around the outer peripheral surface of the pipe H other than the oil storage tank 101. Therefore, in this embodiment, the heating efficiency can be further improved.

  In addition, although this embodiment demonstrated the case where the semiconductor heat exchange element 31d was wound around the piping H, it is not restricted to this. In addition to the pipe H, it is also preferable to wrap the semiconductor heat exchange element 31d around an oil passage part such as a circulation pump 212 (see FIG. 4) in the oil purifier 201.

<Others>
Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 10 ... Panel type heater, 11 ... Housing, 12 ... Handle, 13 ... Power connector, 21 ... Mounting portion, 22 ... Mounting base plate, 11 ... Housing, 11A ... Housing portion, 11B ... Cover portion, 31 ... Semiconductor heat Exchange element 41 ... Insulating waterproofing material 51 ... First heat insulating material 52 ... Second heat insulating material 53 ... Third heat insulating material 61 ... Power input cable 62 ... Power supply connecting cable 71 ... Thermostat 72 ... Internal wiring , 81 ... Voltage regulator, 91 ... Heat transfer body, 101 ... Oil storage tank, 201 ... Oil purifier, 211 ... Total acid value removal filter, 212 ... Circulation pump, 213 ... Moisture removal filter, H ... Piping, 510 ... Thermal insulation Material

Claims (8)

A heating device for heating oil stored in an oil storage tank,
A panel heater installed outside the oil storage tank;
The panel heater is
A housing that includes a first surface that is in contact with the oil storage tank when installed in the oil storage tank and a second surface that is located on the opposite side of the first surface;
A plate-shaped semiconductor heat exchange element housed as a heat source in the housing;
A heat insulating material that is housed in the housing so as to be located on the second surface side relative to the semiconductor heat exchange element, and that insulates heat from the semiconductor heat exchange element toward the second surface side; ,
A power connector installed on the second surface;
Have
Heating device. In the panel heater, the casing is made of aluminum.
The heating apparatus according to claim 1 . A plurality of the panel heaters;
Each of the plurality of panel-type heater, the cable is connected to the power connector thus are electrically connected,
The heating apparatus according to claim 1 or 2 . A thermostat for controlling the operation of the semiconductor heat exchange element so as to reach a set temperature;
The set temperature is set to be higher than a temperature set in order to keep the viscosity of the oil in a predetermined state .
The heating apparatus according to any one of claims 1 to 3 . The panel heater is detachable from the oil storage tank.
The heating apparatus according to any one of claims 1 to 4 . The panel heater is installed in the oil storage tank by magnetic force.
The heating apparatus according to claim 5 . The panel heater is
Installed in the oil storage tank such that a heat transfer member is interposed between the first surface and the oil storage tank;
The heating apparatus according to any one of claims 1 to 6 . A sheet-like semiconductor heat exchange element wound around the outer surface of the oil passage member connected to the oil storage tank;
The heating apparatus according to any one of claims 1 to 7 .

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