JP5202049B2 - Method and apparatus for heating target liquid to be heated - Google Patents

Description

  The present invention provides simple indirect heating of a target liquid to be heated, such as a plating solution, a rust preventive solution, a surface treatment liquid, a food processing liquid, a cleaning liquid, and a contaminated liquid for distillation regeneration after use. The present invention relates to a method for heating a target liquid to be heated, which can be performed safely and inexpensively by an apparatus, and can strictly control temperature, and the apparatus.

  Conventionally, as a method of indirectly heating a target liquid to be heated, such as a plating solution, a rust preventive solution, a surface treatment liquid, a food processing liquid, a cleaning liquid, a contaminated liquid for distillation regeneration after use, etc. There are a heating method using pressurized steam, a heating method using a heat medium liquid, and the like. In addition, as shown in Patent Document 1, a method has been developed in which a fluorine-based liquid is selectively used and heated to a boiling point under normal pressure, and the target liquid to be heated is heated using steam generated by the boiling point heating. .

JP 2003-14299 A

  However, in the heating method using pressurized steam, since a pressure boiler is used as a means for generating pressurized steam, there is a risk of damage to equipment due to high pressure, and therefore sufficient consideration must be given to safety measures. In addition, since the steam is discharged in the form of hot water without being reused after the heat exchange with the target liquid to be heated, the residual heat energy of a large amount of water and hot water is wasted, and global warming It is also a factor.

  In addition, in the heating method using the heat medium liquid, a large amount of the heat medium liquid is required for heat exchange. Therefore, when an expensive liquid is used as the heat medium liquid, the initial cost is high. It was.

  In addition, if a flammable oil having a low flash point is used as the heat medium liquid, the heat medium liquid may be ignited by high temperature heating. In addition, since the apparatus must be used in an open state or a semi-open state in order to prevent overpressure in the apparatus due to oily smoke or gas generated during high-temperature heating of the heat medium liquid, the heat medium liquid must be introduced from this open part. There was also a risk that the vaporized gas leaked outside and ignited. As described above, since there is a high risk of ignition and ignition and a high risk of fire, combustible oil having a low flash point cannot be used as a heat medium liquid.

  In addition, when the apparatus is broken, the heat medium liquid heated at high temperature may be scattered around, and it is difficult to use the apparatus safely. In addition, when the heat exchange part between the heat medium liquid and the target liquid to be heated is damaged due to deterioration or the like, the heat medium liquid may be mixed into the target liquid to be heated. If this is the case, serious problems may occur in terms of safety and hygiene.

  Moreover, in the heating method shown in Patent Document 1, since the fluorinated liquid is heated to the boiling point under normal pressure, the vapor generated by this heating is maintained at the boiling point under the selected normal pressure, and reliable temperature management is easily performed. be able to. However, since the heat medium liquid that can be used in this method is a nonflammable fluorine-based liquid or the like, a combustible oil could not be used. In addition, since the heating temperature is limited to the boiling point in this method, it is difficult to set the heating temperature to an arbitrary temperature.

  Therefore, the present invention is intended to solve the above-described problems, and can be used safely without causing a risk of destruction of the apparatus without using a high-pressure boiler or the like, and may cause ignition and ignition. Therefore, the initial cost is low, and the heating medium liquid is used at an arbitrary temperature so that indirect heating at 100 ° C. or higher can be performed safely and hygienically.

  In the first to sixth inventions of the present application, silicone oil used as a heat medium liquid is heated to a boiling point in a vacuum atmosphere to generate steam at 100 ° C. or higher, and the target liquid to be heated is heated. The silicone oil is an expensive liquid while having the advantages of high thermal stability and resistance to thermal degradation as compared to other petroleum-based heat medium liquids. Therefore, if a large amount of silicone oil is required for heating the target liquid to be heated, the initial cost is high. Therefore, in the first to sixth inventions of the present application, as described above, the silicone oil is heated to the boiling point to generate steam, and the target liquid to be heated is heated using this steam. In this way, the heating operation is performed using the steam generated by the boiling point heating of the silicone oil, which is necessary for the heating operation as compared with the case where the heating is performed using the liquid silicone oil heated to a temperature lower than the boiling point. It is possible to significantly reduce the amount of silicone oil to be reduced, and the initial cost can be reduced.

  Moreover, since there is little oxygen in a vacuum atmosphere, even if it heats the silicone oil which is a combustible oil with a low flash point at high temperature, there is no possibility of ignition. In addition, since the inside of the apparatus is evacuated and depressurized, there is no risk of high pressure, so in order to prevent overpressure in the apparatus due to oily smoke or gas generated during high-temperature heating of the silicone oil that is the heat transfer medium, There is no need to keep part of the device open. Therefore, since the apparatus can be used in a sealed state, there is no possibility that the vaporized gas of silicone oil leaks outside and ignites. In this way, the risk of fire and the like can be reduced and the device can be used safely.

  In addition, since the pressure is reduced in the vacuum atmosphere, even if the device may be damaged, the outside air is drawn into the device in the vacuum atmosphere, so there is no risk of the silicone oil scattering around. It can be used safely. Even if the heat exchange part between the silicone oil that is the heat medium liquid and the target liquid to be heated is damaged due to deterioration or the like, the silicone oil side is evacuated to a negative pressure from the target liquid side to be heated. Therefore, the target liquid to be heated flows into the silicone oil side, and there is no possibility that the silicone oil enters the target liquid side to be heated. Therefore, even when food, medicine, or the like is used as the liquid to be heated, the apparatus can be used safely and hygienically.

  In the first to sixth inventions of the present application, as described above, the silicone oil is heated to the boiling point in a vacuum atmosphere to generate steam at 100 ° C. or higher. Conventionally, it has been generally performed that water is used as a heat medium liquid and the heat medium liquid is heated to a boiling point by a high-pressure steam boiler to generate steam at 100 ° C. or higher. However, in such a method, there are various problems in terms of safety and management, such as the risk of explosion due to the use of a high-pressure steam boiler, and the management of the apparatus is difficult. However, as described above, the present invention uses silicone oil and generates steam in a reduced pressure state without using water as a heat medium liquid, and thus generates steam at 100 ° C. or higher safely and easily. It is something that can be done.

  Further, the third invention of the present application is to heat the silicone oil to a boiling point in a vacuum atmosphere to generate a vapor of 100 ° C. or higher, and to heat the inside in the vacuum atmosphere in which the vapor is generated by heating to the boiling point. A heat exchanger containing the target liquid is disposed, and the target liquid to be heated is heated through the heat exchanger by bringing the silicone oil vapor into contact with the heat exchanger.

  The fourth invention of the present application is an apparatus embodying the invention of the above method, and contains a vacuum mechanism and silicone oil, and is connected to the vacuum mechanism to form a vacuum inside. A heating tank that heats oil to a boiling point by a heating body and generates a steam of 100 ° C. or higher, and stores a liquid to be heated inside, and at least a part of the heating tank is disposed in a vacuum atmosphere of the silicone oil. And a heat exchanger that heats the target liquid to be heated by bringing it into contact with the steam so that heat can be exchanged.

  According to the third and fourth inventions described above, the target liquid to be heated can be heated with a simple configuration in which the target liquid to be heated is housed in the heat exchanger and the vapor of silicone oil is brought into contact with the heat exchanger. This is particularly effective when a small amount of the target liquid to be heated is heated.

  The fifth invention of the present application heats silicone oil to a boiling point in a vacuum atmosphere, introduces steam at 100 ° C. or higher generated by the boiling point heating into a heat exchanger maintained in a vacuum atmosphere, The target liquid to be heated is heated by inserting the target heat liquid into the target liquid to be heated and bringing the target liquid to be heated and the heat exchanger in contact with each other so that heat can be exchanged.

  The sixth invention of the present application is an apparatus embodying the invention of the above method, and contains a vacuum mechanism and silicone oil, and is connected to the vacuum mechanism to make a vacuum inside, and in this vacuum atmosphere the silicone A heating tank that heats the oil to the boiling point by a heating element and generates steam of 100 ° C. or higher, and the silicone oil vapor is introduced and inserted into the target liquid to be heated so that heat can be exchanged with the target liquid. And a heat exchanger that heats the target liquid to be heated. In the fifth and sixth inventions described above, the heat exchanger into which steam is introduced is brought into contact with the target liquid to be heated, which is particularly advantageous when a large amount of the target liquid to be heated is continuously heated. is there.

  The heat exchangers of the fifth and sixth inventions are detachably connected to the inflow pipe and the outflow pipe through which the silicone oil vapor is circulated so that the silicone oil vapor is circulated therein, and the heated target liquid It may be possible to insert it inside. In this way, by connecting the heat exchange body to the inflow pipe and the outflow pipe in a detachable manner, the heat exchange body can be removed and the heat exchange body can be easily cleaned during cleaning. Therefore, it is possible to easily remove the surface dirt adhering to the heat exchanger due to long-term or repeated use, and to prevent the heat exchange efficiency from being lowered due to the surface dirt on the heat exchanger. Further, since the heat exchanger can be thrown into the storage tank for the target liquid to be heated, which is generally used, the apparatus can be simplified.

  In the invention described in Patent Document 1, since the boiling point under normal pressure is constant, the heating temperature of the liquid to be heated is limited to the boiling point of the selected fluorinated liquid under normal pressure. Therefore, the heating temperature of the target liquid to be heated cannot be arbitrarily selected. Therefore, in the first invention to the sixth invention of the present application, since the silicone oil is heated to the boiling point in a vacuum atmosphere to generate a vapor of 100 ° C. or higher, by changing the vacuum degree of this vacuum atmosphere, The boiling point can be adjustable. Then, by changing the degree of vacuum in this way, any heating temperature of 100 ° C. or higher can be selected without limitation as long as the heating temperature of the liquid to be heated is not higher than the boiling point of the silicone oil under normal pressure. .

  Further, as a means for changing the degree of vacuum of the vacuum atmosphere as described above, a pressure sensor may be disposed in the vacuum atmosphere, and the degree of vacuum of the vacuum atmosphere may be adjusted according to a detection signal of the pressure sensor. .

  Further, a temperature sensor may be disposed in the silicone oil so that the heating temperature of the silicone oil can be controlled according to the detection signal of the temperature sensor. In the present invention, the silicone oil is heated to a boiling point in a vacuum atmosphere to generate a vapor of 100 ° C. or higher. Therefore, it is necessary to always keep the silicone oil at the boiling point or higher. Even when the temperature is equal to or higher than the boiling point, when the silicone oil is heated to a temperature much higher than the boiling point, energy for heating is excessively consumed. Therefore, by placing a temperature sensor in the silicone oil and keeping the temperature of the silicone oil at or above the boiling point at all times, the generation of vapor from the silicone oil is ensured and the silicone oil is heated. The required energy cost can be kept low.

  Since the present invention is configured as described above and performs the heating operation using the steam generated by the boiling point heating of the silicone oil, the heating is performed using the liquid silicone oil heated to a temperature lower than the boiling point. Compared with the case where it is performed, the amount of silicone oil required for the heating operation can be remarkably reduced, and the initial cost can be reduced.

  Silicone oil is heated to the boiling point in a vacuum atmosphere, and since there is little oxygen in the vacuum atmosphere, there is a risk of ignition even when silicone oil, a flammable oil with a low flash point, is heated at high temperatures. Absent. In addition, since the inside of the apparatus is evacuated and depressurized, there is no risk of high pressure, so in order to prevent overpressure in the apparatus due to oily smoke or gas generated during high-temperature heating of the silicone oil that is the heat transfer medium, There is no need to keep part of the device open. Therefore, since the apparatus can be used in a sealed state, there is no possibility that the vaporized gas of silicone oil leaks outside and ignites. In this way, the risk of fire and the like can be reduced and the device can be used safely.

  In addition, since the pressure is reduced in the vacuum atmosphere, even if the device may be damaged, the outside air is drawn into the device in the vacuum atmosphere, so there is no risk of the silicone oil scattering around. It can be used safely. Even if the heat exchanger between the silicone oil and the target liquid to be heated is damaged due to deterioration or the like, the silicone oil side is evacuated to a negative pressure from the target liquid to be heated. The heating target liquid flows into the silicone oil side, and there is no possibility that the silicone oil enters the heated target liquid side. Therefore, even when food, medicine, or the like is used as the liquid to be heated, the apparatus can be used safely and hygienically.

  Moreover, since it deals with a device in a reduced pressure state, when handling a device in a high pressure state, there is no need for qualifications necessary for the operator depending on the case. Therefore, the number of workers who handle the apparatus of the present invention is not limited to a certain number of people, and it is easy to secure the workers and work can be performed efficiently. Further, since the silicone oil is heated in a vacuum atmosphere, the boiling point of the silicone oil can be adjusted by changing the degree of vacuum in the vacuum atmosphere, for example. Therefore, the heating temperature of the liquid to be heated is not limited to the boiling point of the silicone oil at normal pressure, and any heating temperature can be selected.

  Embodiment 1 of the present invention will be described in detail with reference to FIG. 1. (1) is a heating tank, which contains therein a silicone oil (2) that is a heat transfer medium, and a target liquid (3) to be heated. The lower end of the stored heat exchanger (14) is inserted. Moreover, this heating tank (1) keeps airtightness by sealing the inside. A heating element (4) is disposed under the heating tank (1). The heating element (4) heats the silicone oil (2) to the boiling point via the heating tank (1), and steam. Is generated.

  Further, a vacuum pump (6) is connected to the heating tank (1) formed as described above through an outflow pipe (5) as shown in FIG. Then, by operating the vacuum pump (6) and sucking the gas in the heating tank (1), the inside of the heating tank (1) can be decompressed to be in a vacuum state. In this embodiment, the vacuum pump (6) is connected. However, in other different embodiments, it is of course possible to connect a vacuum mechanism (22) other than the vacuum pump (6), such as an ejector mechanism. . Moreover, as a vacuum pump (6) used by a present Example and the following Example 3, a dry pump, a liquid ring vacuum pump, etc. can be used.

  Further, the outflow pipe (5) is provided with a condensing pipe (7) for cooling and condensing the steam flowing out from the heating tank (1) with the cooling liquid. As shown in FIG. 1, the condensing pipe (7) is disposed in the cooling tank (9), and a cooling liquid introducing pipe (27) for introducing a cooling liquid such as water is provided at the lower end of the cooling tank (9). ) And a coolant outlet pipe (28) is connected to the upper end. And in order to lengthen the contact distance of a cooling fluid and a condensation pipe | tube (7), the condensation pipe | tube (7) is formed in coil shape. An on-off valve (8) is provided between the condensing pipe (7) and the vacuum pump (6). The outflow pipe (5) and the following introduction pipe (12) are connected to the heating tank (1) while maintaining airtightness.

  The heating tank (1) is provided with a pressure sensor (10) for detecting the pressure in the vacuum atmosphere in the heating tank (1), and in the silicone oil (2) in the heating tank (1). Has a temperature sensor (13) that can detect the temperature of the silicone oil (2). The open valve (11) shown in FIG. 1 is normally closed to maintain the vacuum state in the heating tank (1) even when the apparatus is not used, but it is necessary to release the vacuum. Is for opening the valve to communicate the inside of the heating tank (1) with the outside air via the introduction pipe (12) and releasing the vacuum state in the heating tank (1). The open valve (11) is also used as a refill valve when refilling the silicone oil (2).

  A method for heating the target liquid (3) to be heated according to the present embodiment will be described below. First, the heat exchanger (14) is pre-filled with the target liquid (3) to be heated, and the on-off valve (8) is opened to operate the vacuum pump (6), whereby the outflow pipe (5) is opened. The pressure in the heating tank (1) is reduced, and the atmosphere in the heating tank (1) is evacuated. And the on-off valve (8) is opened and closed so that the inside of the heating tank (1) maintains a certain degree of vacuum.

  And by heating a heating body (4), a silicone oil (2) is heated to a boiling point via a heating tank (1). This boiling point heating generates steam of 100 ° C. or more from the silicone oil (2), and the steam is dispersed in the heating tank (1) and comes into contact with the heat exchanger (14). Thereby, the to-be-heated target liquid (3) accommodated in this heat exchanger (14) will be heated. Thus, by heating the liquid to be heated (3) using the vapor of the silicone oil (2), the liquid to be heated (3) is not heated above the boiling point of the silicone oil (2). Therefore, reliable temperature management can be easily performed.

  Moreover, since the heating operation is performed using the steam generated by the boiling point heating of the silicone oil (2) as described above, it is compared with the case where the heating is performed using the silicone oil (2) which is a liquid heated to below the boiling point. Thus, the amount of silicone oil (2) required for the heating operation can be reduced, and the initial cost can be reduced.

  Further, as described above, the apparatus is used in a vacuum atmosphere, and since there is little oxygen in the vacuum atmosphere, there is no risk of ignition even when the silicone oil (2), which is a flammable oil having a low flash point, is heated at a high temperature. In addition, since the inside of the apparatus is evacuated to reduce pressure and there is no risk of high pressure, overpressure in the apparatus due to oily smoke or gas generated during high-temperature heating of the silicone oil (2), which is a heat medium liquid, is prevented. Therefore, it is not necessary to open a part of the device. Therefore, since the apparatus can be used in a sealed state, there is no possibility that the vaporized gas of the silicone oil (2) leaks to the outside and ignites. In this way, the risk of fire and the like can be reduced and the device can be used safely.

  Moreover, since the inside of the heating tank (1) is in a reduced pressure state, even if the device may be damaged, the outside air is drawn into the device in a vacuum atmosphere, so that the silicone oil (2) is surrounded by the surroundings. There is no risk of splashing and it can be used safely. Even if the heat exchange part between the silicone oil (2) and the heated target liquid (3) is damaged due to deterioration or the like, the silicone oil (2) side is evacuated and the heated target liquid (3 Since the target liquid (3) to be heated flows into the silicone oil (2) side and the silicone oil (2) is not likely to be mixed into the target liquid side to be heated. Become. Therefore, even when food, medicine, or the like is used as the heating target liquid (3), the apparatus can be used safely and hygienically.

  The surplus steam of the silicone oil (2) generated in the heating tank (1) flows into the condensation pipe (7) through the outflow pipe (5) with the operation of the vacuum pump (6). It is condensed in (7). Then, the condensate is again collected in the heating tank (1) through the outflow pipe (5). In this embodiment, the outflow pipe (5) is provided with the condensing pipe (7). However, in other different embodiments, the outflow pipe (5) is not provided with the condensing pipe (7), and the outflow pipe (5) is provided. ) Can also be connected directly to the vacuum pump (6).

  The degree of vacuum in the heating tank (1) can be detected and adjusted by a pressure sensor (10) provided in the heating tank (1). That is, when the pressure in the heating tank (1) is reduced by the vacuum pump (6) and reaches a certain pressure, the pressure sensor (10) transmits a detection signal to a control device (not shown). The on / off valve (8) is closed by this control device. Thereby, the vacuum atmosphere in the heating tank (1) can be adjusted to a certain degree of vacuum.

  As described above, since the pressure in the heating tank (1) can be adjusted as appropriate, the silicone oil (2) stored in the heating tank (1) can be changed by changing the degree of vacuum in the heating tank (1). The boiling point of can be adjusted. Therefore, since the boiling point is not limited to the boiling point under normal pressure as in Patent Document 1, it is possible to adjust the boiling point to a desired boiling point. Therefore, the heating temperature of the liquid to be heated (3) is arbitrarily selected. be able to.

  Further, in order to keep the temperature of the silicone oil (2) in the heating tank (1) at a set temperature that is higher than the boiling point of the silicone oil (2) and close to the boiling point, the silicone oil (2) in the heating tank (1) Further, a temperature sensor (13) for detecting the temperature of the silicone oil (2) is disposed. The temperature sensor (13) transmits a detection signal to a control device (not shown) when the silicone oil (2) reaches a temperature lower or higher than the set temperature.

  And the heating temperature of the silicone oil (2) can be adjusted to the set temperature by raising or lowering the temperature of the heating element (4) by the control device. Thereby, it becomes possible to always keep the set temperature of the silicone oil (2) at or above the boiling point and close to the boiling point. Therefore, the silicone oil (2) is always heated above the boiling point to ensure the generation of vapor from the silicone oil (2), and the silicone oil (2) rises to a temperature much higher than the boiling point. The situation can be prevented, and the energy cost required for heating the silicone oil (2) can be minimized.

  Moreover, in the said Example 1, while using the heat exchanger (14) which accommodated the to-be-heated target liquid (3) inside and arrange | positioned the lower end in the heating tank (1), it uses this Example 2. In this case, a circulation pipe (15) in which a vapor of silicone oil (2) as a heat medium liquid is circulated is used as a heat exchanger (14). The second embodiment will be described in detail below with reference to FIG. 2. A heat exchanger (14) of the second embodiment is a flow pipe (15) in which a vapor of silicone oil (2) is circulated. It is fixedly arranged in a coil shape on the inner periphery of the storage tank (16) that stores the heating target liquid (3). One end of the heat exchanger (14) is connected to one end of the inflow pipe (17), and the other end is connected to one end of the outflow pipe (5).

  The other end of the inflow pipe (17) is connected to the heating tank (1). The heating tank (1) contains the silicone oil (2), which is a heat medium liquid, inside, and the inside is sealed to maintain airtightness. The outflow pipe (5) branches into a first outflow pipe (20) and a second outflow pipe (21) outside the storage tank (16), and the first outflow pipe (20) is evacuated to a vacuum mechanism (22). And the second outflow pipe (21) is connected to the heating tank (1).

  The inflow pipe (17), the outflow pipe (5), the first outflow pipe (20), and the second outflow pipe (21) are connected to the heating tank (1) while maintaining airtightness. . The vacuum mechanism (22) may be a liquid-sealed vacuum pump (6) as long as it can suck the vapor in the heat exchanger (14), or an ejector or other mechanism. There is no particular limitation. A first on-off valve (23) and a second on-off valve (24) are arranged in the first outflow pipe (20) and the second outflow pipe (21), respectively.

  In the configuration as described above, the vacuum mechanism (22) is operated with the first on-off valve (23) opened and the second on-off valve (24) closed, and the heating tank (1) and heat The inside of the exchanger (14) is depressurized until a certain degree of vacuum is reached, and the first on-off valve (23) is opened / closed while maintaining this reduced pressure. In this way, steam is generated by heating the heating element (4) while maintaining the vacuum state and heating the silicone oil (2) in the heating tank (1) to the boiling point. The steam flows from the heating tank (1) through the inflow pipe (17) into the heat exchanger (14), so that the steam contacts the heat exchanger (14) and the heat exchanger (14). Is heated up to the boiling temperature, so that the liquid to be heated (3) is heated through the heat exchanger (14).

  Further, in the first embodiment, the condensing pipe (7) is provided to condense the surplus steam, but in this second embodiment, the surplus steam is a liquid ring vacuum pump without providing the condensing pipe (7). The vacuum mechanism (22) can be recovered. The steam in the heat exchanger (14) is liquefied by heat exchange with the target liquid (3) to be heated and flows out from the outflow pipe (5) to the second outflow pipe (21). By closing 23) and opening the second on-off valve (24), the condensate flows into the heating tank (1) through the second outflow pipe (21) and is collected. As described above, since the liquefied vapor in the heat exchanger (14) flows out to the outflow pipe (5), the first on-off valve (23) and the second on-off valve (24) are opened and closed. It is necessary to do it in a timely manner. In another different embodiment, as in the first embodiment, it is possible to condense and collect surplus steam by providing a condensing pipe (7) in the outflow pipe (5).

  In the second embodiment, the flow pipe (15) in which the vapor of the silicone oil (2) that is the heat medium liquid is circulated is used as the heat exchanger (14), and the heat exchanger (14) is Although it is fixedly arranged in the storage tank (16), in the third embodiment, it is inserted into the heated target liquid (3) of the storage tank (16) and the silicone oil (2), which is a heat medium liquid, is contained inside. The heat exchanger (14) for circulating the steam is detachably connected to the inflow pipe (17) and the outflow pipe (5) through which the steam of the silicone oil (2) is circulated. The third embodiment will be described in detail with reference to FIG. 3. The heat exchanger (14) of the present embodiment has a steam flow passage (25) formed therein and is curved in a bellows shape or a coil shape. In addition, it is inserted into the liquid to be heated (3) stored in the storage tank (16), and one end and the other end are arranged to protrude outward from the side wall of the storage tank (16).

  One end of the inflow pipe (17) provided with the introduction valve (26) is detachably connected to one end of the heat exchanger (14), and one end of the outflow pipe (5) is attached to and detached from the other end. Connect as possible. Further, the other end of the inflow pipe (17) is connected to a heating tank (1) which stores therein a silicone oil (2) which is a heat medium liquid and maintains airtightness. The outflow pipe (5) is branched into a first outflow pipe (20) and a second outflow pipe (21). The first outflow pipe (20) and the second outflow pipe (21) are each a vacuum pump. It is connected to (6) and the heating tank (1). 3, the first outlet pipe (20) is provided with a condensation pipe (7) and a first on-off valve (23), and the second outlet pipe (21) is provided with a second on-off valve (24). Is provided.

  Thus, by connecting the heat exchanger (14) to the inflow pipe (17) and the outflow pipe (5) in a detachable manner, the heat exchanger (14) is removed during cleaning, and the heat exchanger (14) is removed. Cleaning can be performed easily. Therefore, it is possible to easily remove the surface dirt adhering to the heat exchanger (14) due to long-term or repeated use, and to prevent the heat exchange efficiency from being lowered due to the surface dirt of the heat exchanger (14). In the third embodiment, the vacuum pump (6) is used to depressurize the inside of the heating tank (1). However, in other different embodiments, the invention is not limited to this, and other than the vacuum pump (6) such as an ejector. It is also possible to use the vacuum mechanism (22).

  In the configuration as described above, first, the introduction valve (26) and the first on-off valve (23) are opened, and the second on-off valve (24) is closed. Then, the vacuum pump (6) is operated to depressurize the inside of the heating tank (1) until a certain degree of vacuum is reached, and the first on-off valve (23) is opened / closed by maintaining it. And by heating a heating body (4), the silicone oil (2) in a heating tank (1) is heated to a boiling point, and a vapor | steam is generated. As a result, the steam flows into the flow passage (25) of the heat exchanger (14) through the inflow pipe (17), and the steam contacts the heat exchanger (14), so that the heat exchanger (14) becomes silicone. Since the oil (2) is heated to the boiling point, the heat target liquid (3) is heated by the heat exchanger (14).

  Further, surplus steam that has passed through the outflow pipe (5) and the first outflow pipe (20) from the heat exchanger (14) is condensed by the condensation pipe (7), and the condensate opens the second on-off valve (24). By the valve, it is recovered in the heating tank (1) through the second outflow pipe (21). In this embodiment, the first outflow pipe (20) is provided with the condensing pipe (7). In other different embodiments, the condensing pipe (7) is not provided, and the first outflow pipe (20) is provided. It is also possible to connect directly to the vacuum pump (6).

  When the heat exchanger (14) is removed from the inflow pipe (17) and the outflow pipe (5), all operations are stopped when not in use, and all the valves provided in the apparatus are closed to heat the heat exchanger (14). Since the exchanging operation of the exchanger (14) is performed, it is possible to safely remove the heat exchanging device (14) without any situation in which steam flows out from the heating tank (1) through the inflow pipe (17). It can be carried out.

1 is a conceptual diagram illustrating Example 1. FIG. FIG. 6 is a conceptual diagram illustrating Example 2. FIG. 6 is a conceptual diagram illustrating Example 3;

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heating tank 2 Silicone oil 3 Target liquid to be heated 4 Heating body 5 Outflow pipe 10 Pressure sensor 14 Heat exchanger 17 Inflow pipe 22 Vacuum mechanism

Claims (12)

  A target liquid to be heated is obtained by heating silicone oil to a boiling point in a vacuum atmosphere and heating the target liquid to be heated through a heat exchanger using steam of 100 ° C. or higher generated by the boiling point heating. Heating method.   A pressure-resistant heating tank that heats silicone oil to the boiling point in a vacuum atmosphere to generate steam, and a heat exchanger that exchanges heat with the target liquid to be heated by the steam generated in the heating tank at 100 ° C. or higher. An apparatus for heating a target liquid to be heated.   A heat exchanger in which a target liquid to be heated is contained in a vacuum atmosphere in which silicone oil is heated to a boiling point in a vacuum atmosphere to generate steam of 100 ° C. or higher and steam is generated by heating to the boiling point. A method for heating a target liquid to be heated, wherein the target liquid is heated through the heat exchanger by placing and bringing the vapor of silicone oil into contact with the heat exchanger.   A heating mechanism for storing a silicone oil and connecting it to the vacuum mechanism to form a vacuum inside, and heating the silicone oil to a boiling point by a heating body in this vacuum atmosphere to generate a vapor of 100 ° C. or higher; In addition, the target liquid to be heated is accommodated therein, and at least a part of the target liquid is placed in the vacuum atmosphere of the heating tank so as to be in contact with the silicone oil vapor so that heat can be exchanged. A heating device for a target liquid to be heated, comprising a heat exchanger.   Silicone oil is heated to the boiling point in a vacuum atmosphere, and steam generated at the boiling point of 100 ° C. or higher is introduced into the heat exchanger maintained in the vacuum atmosphere, and the heat exchanger is placed in the target liquid to be heated. A method for heating a target liquid to be heated, wherein the target liquid to be heated and the heat exchanger are brought into contact with each other so as to allow heat exchange.   A heating mechanism for storing a silicone oil and connecting it to the vacuum mechanism to form a vacuum inside, and heating the silicone oil to a boiling point by a heating body in this vacuum atmosphere to generate a vapor of 100 ° C. or higher; And a heat exchanger that heats the liquid to be heated by introducing steam of the silicone oil, inserting it into the liquid to be heated, and contacting the liquid to be heated in a heat exchangeable manner. A heating apparatus for the target liquid to be heated.   The heat exchanger shall be detachably connected to the inflow pipe and the outflow pipe through which the silicone oil vapor has been circulated to allow the silicone oil vapor to circulate therein and be inserted into the liquid to be heated. The method for heating a target liquid to be heated according to claim 1 or 5.   The heat exchanger shall be detachably connected to the inflow pipe and the outflow pipe through which the silicone oil vapor has been circulated to allow the silicone oil vapor to circulate therein and be inserted into the liquid to be heated. The apparatus for heating a liquid to be heated according to claim 2 or 6.   6. The method for heating a liquid to be heated according to claim 1, wherein the boiling point of the silicone oil is adjustable by changing the degree of vacuum in a vacuum atmosphere.   7. The apparatus for heating a liquid to be heated according to claim 2, wherein the boiling point of the silicone oil can be adjusted by changing the degree of vacuum in a vacuum atmosphere.   6. The heating of the target liquid to be heated according to claim 1, wherein a pressure sensor is arranged in the vacuum atmosphere, and the degree of vacuum of the vacuum atmosphere can be adjusted according to a detection signal of the pressure sensor. Method. The heating of the target liquid to be heated according to claim 2, 4 or 6, wherein a pressure sensor is arranged in the vacuum atmosphere, and the degree of vacuum of the vacuum atmosphere can be adjusted according to a detection signal of the pressure sensor. apparatus.

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