JP6438359B2 - Heater for solvent heating - Google Patents

Description

  The present invention relates to a solvent heating heater for heating a solvent stored in a solvent storage tank.

  As a conventional heater for solvent heating, there exists a thing of a structure as shown, for example in FIG. In FIG. 3, the solvent heating heater 2 includes a heater body 5 disposed in the solvent storage tank 1. In the structure shown in FIG. 3, since the solvent 3 is directly heated by the heater body 5, it is excellent in terms of heat transfer efficiency.

  However, in the structure shown in FIG. 3, when a crack or breakage occurs in the heater main body 5 due to any cause, there is a possibility that electric leakage may occur by applying a voltage directly to the solvent 3. Further, when the heater body 5 is pulled out of the solvent storage tank 1 for repair and replacement work of the heater body 5, it is necessary to discharge all the solvent in the solvent storage tank 1.

  As a solvent heating heater that solves the above problems, there is a structure as shown in FIG. 4, for example. In FIG. 4, the heater main body 5 of the solvent heating heater 2 is disposed in a heater protection tube 4 disposed in the solvent storage tank 1. A heat transfer material 6 is filled between the heater protection tube 4 and the heater body 5, and heat generated in the heater body 5 is transmitted to the solvent 3 through the heat transfer material 6 and the heater protection tube 4. In the structure shown in FIG. 4, since the heater body 5 is not in contact with the solvent 3, even when the heater body 5 is cracked or damaged, a voltage is not directly applied to the solvent 3, and a leakage occurs. There is no fear. Further, when the heater body 5 is pulled out from the solvent storage tank 1 for repair and replacement work, it is not necessary to discharge the solvent 3 in the solvent storage tank 1. Non-Patent Document 1 discloses a solvent heating heater having a structure similar to the structure shown in FIG.

  Non-Patent Document 1 states that “by enclosing the liquid contact side outside of the heating element with the heat transfer protection means, while ensuring heat transfer, the above protection means prevents damage to the heating element due to external force, There has been disclosed a “solvent heating heater” that can prevent a heater voltage from being directly applied to a solvent even when a heating element is damaged due to any cause, thereby preventing leakage.

Noto 3027767

  However, in the structure shown in FIG. 4, since the outer peripheral surface of the heater protection tube 4 is in contact with the inner peripheral surface of the heater mounting hole 10 formed in the tank body plate 1a, as shown in FIG. The vicinity of the heater mounting hole 1a may be excessively heated by the heat of the heater body 5 that has entered the heater protection tube 4 and may be damaged. Therefore, it is necessary to separately provide means for cooling the periphery of the heater mounting hole 10 of the tank body plate 1a.

  The present invention has been made in view of the above-described problems. The object of the present invention is that there is no risk of damage to the heater body and leakage of electricity, and that the heater body can be repaired and replaced easily. It is to provide a solvent heating heater capable of improving the heat transfer efficiency of the heater and suppressing heat transfer from the heater heating portion to the vicinity of the heater mounting hole of the tank shell plate.

In order to solve the above-mentioned problems, the present invention provides a heater for heating a solvent stored in a solvent storage tank, wherein the heater is protected by being inserted through a mounting hole formed in a body plate of the solvent storage tank. A pipe, a heater main body disposed in the heater protective pipe, a heat transfer material filled between the heater protective pipe and the heat generating part of the heater, and a non-heat generating part of the heater main body having heat insulation A partition member for partitioning the inside of the heater protection tube, and the partition member includes a heat insulating material having the same outer peripheral shape as the inner peripheral shape of the heater protection tube; And a pair of support members arranged on both sides of the heat insulating material and fixed to each other .

  According to the present invention, by disposing the heater body in the heater protection tube, the heater body can be prevented from being damaged and leaked, and the heater body can be easily repaired and replaced. In addition, by providing a heat insulating partition member at a predetermined position in the heater protection tube, heat transfer efficiency from the heater heat generating part to the solvent is improved, and heat transfer to the tank body plate near the heater mounting hole is suppressed. it can.

It is sectional drawing of the solvent storage tank provided with the heater for solvent heating which concerns on the Example of this invention. It is an expanded sectional view of the heater for solvent heating shown in FIG. It is sectional drawing of the solvent storage tank provided with the heater for solvent heating which concerns on a prior art. It is sectional drawing of the solvent storage tank provided with the heater for solvent heating which concerns on another prior art. It is an expanded sectional view of the heater for solvent heating shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected to the same member and the overlapping description is abbreviate | omitted suitably.

  FIG. 1 is a cross-sectional view of a solvent storage tank provided with a solvent heating heater according to an embodiment of the present invention.

  In FIG. 1, a solvent storage tank 1 closes a tank body plate 1a formed in a cylindrical shape, a tank bottom plate 1b that closes a lower opening of the tank body plate 1a, and an upper opening of the tank body 1a. And a tank top plate 1c. In addition, the solvent storage tank 1 is not limited to a cylindrical one, and may have another shape such as a square tank.

  The solvent heating heater 2 is for heating the solvent 3 stored in the solvent storage tank 1, and includes a heater protection tube 4, a heater body 5, a heat transfer material 6, a heater support plate 7, and a terminal. A box 8 and a partition member 9 are provided.

  The heater protection tube 4 is attached by being inserted into a heater attachment hole 10 formed in the tank body plate 1a so that the outer peripheral surface thereof is in contact with the solvent 3 in the solvent storage tank 1. As the metal constituting the heater protection tube 4, stainless steel, titanium, titanium alloy, or the like having heat resistance, corrosion resistance, and high rigidity is desirable.

  The heater body 5 is a heating element formed of a substantially U-shaped outer tube that contains a heat source (not shown) such as a nichrome wire therein, and is disposed in the heater protection tube 4. Thereby, damage to the heater body 5 due to external force or the like can be prevented. Even if the heater main body 5 is damaged, the heater main body 5 is not in contact with the solvent 3, so that a voltage is not directly applied to the solvent 3, and there is no possibility of leakage.

  A flange 4 a is attached to the proximal end portion of the heater protection tube 4 by welding or the like. A heater support plate 7 attached to the base end portion of the heater body 5 is fastened to the flange 4a with a bolt or the like. A terminal box 8 for leading a lead wire (not shown) of the heater body 5 to the outside is attached to the heater support plate 7. The terminal box 8 is configured to prevent moisture and gas from entering the heater protection tube 4.

  The heater body 5 includes a heater heat generating portion 5a that generates heat when energized and a heater non-heat generating portion 5b that does not generate heat when energized. A member (hereinafter referred to as “partition member”) 8 for partitioning the inside of the heater protective tube 4 in a liquid-tight manner is attached to a portion of the heater non-heat generating portion 5b disposed closer to the inside of the tank than the tank body plate 1a. Yes. A heat transfer material 6 is filled between the heater protection tube 4 and the heater heat generating portion 5a. The heat generated in the heater heating part 5 a is transmitted to the solvent 3 through the heat transfer material 6 and the tube wall of the heater protection tube 4.

  FIG. 2 is an enlarged cross-sectional view of the solvent heating heater 2 shown in FIG. In FIG. 2, the partition member 9 includes a heat insulating material 9a and supports 9b and 9c. The heat insulating material 9 a has the same outer peripheral shape as the inner peripheral shape of the heater protective tube 4, and the outer peripheral surface thereof is in close contact with the inner peripheral surface of the heater protective tube 4, whereby the tank body plate of the heater non-heat generating portion 5 b. The heater protection tube 4 is partitioned at a position closer to the inside of the tank than 1a. The heat insulating material 9a is supported by fastening the supports 9b and 9c arranged on both side surfaces with bolts 9d.

  A portion of the heater protection tube 4 on the left side of the partition member 9 in the figure (side including the heater heat generating portion 5 a) forms a heater effective heat transfer portion 4 b that contributes to heat exchange with the solvent 3. On the other hand, the portion of the heater protection tube 4 on the right side (the side not including the heater heat generating portion 5a) of the partition member 9 forms a heater ineffective heat transfer portion 4c that does not contribute to heat exchange with the solvent 3. Here, by not filling the heat transfer material 6 inside the heater protection tube 4 on the right side of the partition member 9 in the figure (the side not including the heater heat generating portion 5a), the heat insulating effect by the partition member 9 can be improved. .

  Hereinafter, the average temperature T1 in the heater effective heat transfer unit 4b, the average temperature T2 of the inner peripheral surface of the heater ineffective heat transfer unit 4c, the average temperature T3 of the outer peripheral surface of the heater effective heat transfer unit 4b, and the heater ineffective heat transfer The relationship between the average temperature T4 of the outer peripheral surface of the part 4c and the average temperature T5 of the solvent 3 will be described.

  The heat generated in the heater heat generating part 5a is transmitted to the solvent 3 through the heat transfer material 6 filled in the heater effective heat transfer part 4b and the tube wall of the heater effective heat transfer part 4b. Therefore, the average temperature T3 of the outer peripheral surface of the heater effective heat transfer section 4b is lower than the average temperature T1 in the heater effective heat transfer section 4b and higher than the average temperature T5 of the solvent 3 (T1> T3> T5).

  The heater ineffective heat transfer section 4c is partitioned from the heater effective heat transfer section 4b by a partition member 9 having a heat insulating property, and no heat source is present in the heater ineffective heat transfer section 4c. Therefore, the average temperature T2 of the inner peripheral surface of the heater ineffective heat transfer section 4c is significantly lower than the average temperature T1 in the heater effective heat transfer section 4b (T1 >> T2).

  The heat generated in the heater heat generating part 5a is transferred from the tube wall of the heater effective heat transfer part 4b to the tube wall of the heater ineffective heat transfer part 4c, but there is a heat source in the heater ineffective heat transfer part 4c. Instead, the tube wall of the heater invalid heat transfer section 4c is cooled by heat exchange with the solvent 3 or outside air. Therefore, the average temperature T4 on the outer peripheral surface of the heater ineffective heat transfer section 4c is lower than the average temperature T3 on the outer peripheral surface of the heater effective heat transfer section 4b (T3> T4).

From the above, the relationship between the temperatures is expressed by the following equation.
T1 >>T2>T3>T4> T5

  According to the present invention, the heater main body 5 is disposed in the heater protection tube 4, so that the heater main body is prevented from being damaged and leaked, and when the heater main body 5 is pulled out from the solvent storage tank 1 for repair and replacement work. In addition, it is not necessary to discharge the solvent 3 in the solvent storage tank 1.

  Furthermore, a partition member 9 having heat insulation is provided at a position closer to the inside of the solvent storage tank 1 in the heater non-heat generating portion 5b, and the heater protection tube 4 is partitioned so that it contacts the inner peripheral surface of the heater mounting hole 10. Since the average temperature T4 of the outer peripheral surface of the heater ineffective heat transfer section 4c is significantly lower than the average temperature T1 in the heater effective heat transfer section 4b (T1 >> T4), the heater mounting of the tank shell plate 1a from the heater heating section 5a Heat transfer to the hole 10 is suppressed. As a result, it is possible to prevent thermal damage in the vicinity of the heater mounting hole 10 of the tank shell plate 1a without separately providing means for cooling the vicinity of the heater mounting hole 10 of the tank shell plate 1a. In addition, heat transfer efficiency from the heater heat generating portion 5a to the solvent 3 is improved by suppressing heat transfer from the heater heat generating portion 5a to the heater ineffective heat transfer portion 4c.

  The present invention is not limited to the above-described embodiments, and includes various modifications. For example, in the above-described embodiment, one partition member 9 is provided inside the tank of the heater non-heat generating portion 5b. However, the present invention is not limited to this, and a plurality of partitions are arranged near the tank inside of the heater non-heat generating portion 5b. The member 9 may be provided. As a result, heat transfer from the heater heat generating portion 5a to the vicinity of the heater mounting hole 10 of the tank shell plate 1a can be further suppressed, and heat transfer efficiency from the heater heat generating portion 5a to the solvent 3 can be further improved. Become.

  The above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, or the configuration of another embodiment can be added to the configuration of one embodiment. Furthermore, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

DESCRIPTION OF SYMBOLS 1 ... Solvent storage tank, 1a ... Tank body plate, 1b ... Tank bottom plate, 1c ... Tank top plate, 2 ... Solvent heater, 3 ... Solvent, 4 ... Heater protective tube, 4a ... Flange, 4b ... Heater effective heat transfer , 4c ... heater invalid heat transfer part, 5 ... heater body, 5a ... heater heat generating part, 5b ... heater non-heat generating part, 6 ... heat transfer material, 7 ... heater support plate, 8 ... terminal box, 9 ... partitioning member, 9a ... Insulating material, 9b, 9c ... Support, 9d ... Bolt, 10 ... Heater mounting hole, T1 ... Average temperature in heater effective heat transfer section, T2 ... Average temperature on inner peripheral surface of heater ineffective heat transfer section, T3 ... Heater Average temperature of the outer peripheral surface of the effective heat transfer section, T4: Average temperature of the outer peripheral surface of the heater ineffective heat transfer section, T5: Average temperature of the solvent

Claims (4)

In the heater for solvent heating that heats the solvent stored in the solvent storage tank,
A heater protective tube attached by being inserted through a mounting hole formed in the body plate of the solvent storage tank;
A heater body disposed in the heater protection tube;
A heat transfer material filled between the heater protection tube and the heat generating portion of the heater body;
Has thermal insulation, provided inboard position of the solvent storage tank of the non-heating portion of the heater body, and a partition member for partitioning the heater protective tube,
The partition member has a heat insulating material having the same outer peripheral shape as the inner peripheral shape of the heater protection tube, and a pair of support members disposed on both sides of the heat insulating material and fixed to each other. Heater for heating. The heater for solvent heating according to claim 1,
A solvent heating heater comprising a plurality of the partition members. In the heater for solvent heating according to claim 1 or 2,
A heater for heating a solvent, wherein a heat transfer material is not filled near the outside of the solvent storage tank in a non-heat generating portion of the heater main body in the heater protective tube.   The solvent storage tank provided with the heater for solvent heating in any one of Claims 1 thru | or 3.

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