JP2003014299A - Method and system for heating target liquid being heated - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manage the temperature of vapor for heating a target liquid being heated surely and easily, to obtain a small heating system of high safety by eliminating a pressure boiler, and the like, because a fluorine based liquid is heated up to the boiling point under normal pressure, and to minimize energy consumption by heating a small quantity of fluorine based liquid and supplying a required quantity sequentially. SOLUTION: Fluorine based liquids 2 having different boiling point are employed selectively and heated up to the boiling point under normal pressure and then a target liquid 5 being heated is heated using vapor generated by heating the fluorine based liquids up to the boiling point.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention enables indirect heating of a target liquid to be heated, such as a cleaning liquid, a contaminated liquid after cleaning and a food processing liquid, at a low cost with a simple device. It is designed so that temperature control can be strictly performed.

[0002]

2. Description of the Related Art Conventionally, as a method for indirectly heating a liquid to be heated such as a cleaning liquid, a contaminated liquid after cleaning and a food processing liquid, an indirect heating method using pressurized steam, There are an indirect heating method using a heat medium liquid and an indirect heating method using hot air, warm air, and the like.

[0003]

However, in the indirect heating method using pressure steam, a pressure boiler for generating pressure steam is required, the equipment becomes large, and the water to the pressure steam generation section is increased. However, there is a drawback that the equipment cost, the management cost, and the like are large because it is necessary to constantly supply the waste water and to treat the waste water by draining from the pressurized steam and the wrap. Also, since a pressure boiler is used, it is necessary to give sufficient consideration to safety measures.

Further, in the indirect heating method using the heat medium liquid, the amount of the heat medium liquid to be heated is large and the consumption of heat energy is large. In addition, when performing indirect heating of cleaning liquid, contaminated liquid after cleaning, etc., of course, precise temperature control is required to keep the liquid temperature constant. When using, it was difficult to precisely control the temperature. Further, when the heat medium liquid is used, it is effective to use the circulation pump in order to increase the heat exchange rate, but the equipment cost becomes expensive. Further, the heat medium liquid is generally liable to be thermally deteriorated by heating, and the fluorine-based liquid which does not cause heat deterioration has a drawback that it is expensive.

In addition, in the indirect heating method using hot air or warm air, running costs are high and heat loss is large.
It also has the drawback of being uneconomical because it requires a blower and the like.

In order to solve the above problems, the present invention provides
The equipment cost will be reduced by a simple device without increasing the size of equipment such as a pressure boiler. In addition, the consumption of heat energy can be reduced, and precise temperature control can be easily performed.

[0007]

In order to solve the above-mentioned problems, the present invention selectively heats fluorine-based liquids having different boiling points to heat them up to the boiling point under normal pressure, It is characterized in that the target liquid to be heated is heated by using it.

As an apparatus for embodying the invention of the above method, fluorine-containing liquids having different boiling points are selectively stored,
It consists of a heating tank that heats the fluorinated liquid to the boiling point with a heating body under normal pressure to generate steam, and a heat exchanger that is heated by the steam of the fluorinated liquid and exchanges heat with the target liquid to be heated. .

Further, the fluorine-based liquid may selectively use one or more of perfluorocarbon, perfluoropolyether, hydrofluoroether and hydrofluorocarbon.

The heat exchanger may be a storage tank for storing the target liquid to be heated, and the vapor may be brought into contact with the storage tank to heat the target liquid to be heated inside. .

Further, the heat exchange element may be a flow pipe which is inserted into the target liquid to be heated and through which the vapor of the fluorinated liquid is passed.

Further, the heat exchange element is detachably connected to a flow pipe through which the vapor of the fluorinated liquid is circulated so as to circulate the vapor inside and can be inserted into the target liquid to be heated. May be.

Further, a temperature sensor may be arranged in the target liquid to be heated, and the supply of the vapor of the fluorine-based liquid to the heat exchanger may be controlled according to the detection signal of the temperature sensor.

[0014]

As described above, the present invention selectively uses fluorine-based liquids having different boiling points to heat them to the boiling point under normal pressure, and heats the target liquid to be heated using the vapor generated by the heating of the boiling points. Therefore, if the fluorine-based liquid corresponding to the heating target temperature of the target liquid to be heated is selectively used and heated to the boiling point or higher, the vapor generated by this heating is kept at the boiling point of the selected fluorine-based liquid. . If the target liquid to be heated is heated using this vapor, it will not be heated above the boiling point of the selected fluorine-based liquid, and reliable temperature control can be easily performed. In addition, with the heating section of the selected fluorine-based liquid,
If the communication with the storage unit for the target liquid to be heated is cut off, the heating of the target liquid to be heated is immediately stopped. Therefore, this heating can easily control the temperature from the side of stopping.

Further, since the selected fluorine-based liquid is heated to the boiling point under normal pressure, a pressure boiler or the like for generating pressurized steam is not required unlike the indirect heating method using pressurized steam. Therefore, the equipment is small and simple, and the pressure control is not required, so the safety is high. Also, since the selected fluorine-based liquid only needs to be heated by the amount necessary to generate steam, it is possible to heat a small amount of the fluorine-based liquid and replenish the required amount in sequence. Can be minimized. Further, in the present invention, it is possible to eliminate the disadvantage that the amount of the heating medium liquid to be heated is large and the consumption of heat energy is large like the indirect heating method using the heating medium liquid. Also, since the target liquid to be heated is heated using the vapor of a fluorine-based liquid, complicated equipment for temperature control such as a circulation pump is not required, and accurate heating of the target liquid to be heated is possible at low cost. It is what

As the fluorine-based liquid, one or more of perfluorocarbon, perfluoropolyether, hydrofluoroether and hydrofluorocarbon can be selectively used. The heat exchange element that is heated by the vapor of the fluorine-based liquid and exchanges heat with the target liquid to be heated is formed by a storage tank that stores the target liquid to be heated, and the vapor of the fluorine-based liquid is brought into contact with this storage tank. And heats the target liquid to be heated inside.

Further, the heat exchange element may be a flow pipe which is inserted into the target liquid to be heated and through which the vapor of the fluorinated liquid is circulated, or is attachable to and detachable from the flow passage through which the fluorinated liquid vapor is circulated. The heat exchanger may be formed by connecting to the above to allow the vapor to flow inside and to be inserted into the target liquid to be heated.

If a temperature sensor is arranged in the target liquid to be heated and the supply of the fluorine-based liquid vapor to the heat exchanger is controlled according to the detection signal of the temperature sensor, the target liquid to be heated is It is possible to quickly control heating and non-heating. In particular, in the present invention, since pressurized steam or heating liquid is not used as a heat source, the heating energy of the heat exchanger rapidly disappears if the supply of the fluorine-based liquid vapor to the heat exchanger is stopped. However, it is possible to stop the heating of the target liquid to be heated, and it is possible to precisely control the temperature of the target liquid to be heated.

[0019]

EXAMPLE An example of the present invention will be described below with reference to FIG. 1. (1) is a heating tank, which has different boiling points such as perfluorocarbon, perfluoropolyether, hydrofluoroether, hydrofluorocarbon, etc. Fluorine-based liquid (2) 1
Heated body (3) under normal pressure, containing one or more species selectively
The fluorinated liquid (2) is heated to the boiling point to generate steam. And, in this heating tank (1)
The lower end of (4) is inserted. The heat exchanger (4) is a storage tank in which the target liquid to be heated (5) is introduced and stored through the introduction pipe (9).
(6) The vapor of the fluorine-based liquid (2) is brought into contact with the storage tank (6) to heat the target liquid to be heated (5) inside. The vapor generated by this heating is kept at the boiling point of the selected fluorine-based liquid (2). If the target liquid (5) to be heated is heated using this vapor, the selected fluorine-based liquid (2)
It is not heated above the boiling point of, and reliable temperature control can be easily performed.

With this reliable temperature control, it is possible to obtain excellent technical effects by heating the target liquid (5) to be heated. For example, when the target liquid to be heated (5) is a contaminated cleaning liquid in which the cleaning of the object to be cleaned has been completed, by heating according to the boiling point of a specific substance in the contaminated cleaning liquid, only this substance is distilled and recovered. You can do it. In addition, when the food is heated with the target liquid (5) to be heated whose temperature is strictly controlled, it is possible to cook according to the characteristics of the food or cook without destroying specific nutrients. To do. Further, a condenser (8) in which cooling water (7) is circulated is connected to the heating tank (1) to condense and recover the vapor of the fluorine-based liquid (2).

Further, a temperature sensor (14) is arranged in the target liquid (5) to be heated, and the fluorine-based liquid (2) to the heat exchanger (4) is responsive to the detection signal of the temperature sensor (14). If the supply of steam is controlled, it becomes possible to quickly control heating and non-heating of the target liquid to be heated (5). In particular, in the present invention, pressurized steam or heated liquid is not used as a heat source. Therefore, if the supply of the fluorine-based liquid (2) vapor to the heat exchanger (4) is stopped, the heat exchanger ( The heating energy of 4) rapidly disappears, and it becomes possible to stop the heating of the liquid to be heated (5), and it becomes possible to precisely control the temperature of the liquid to be heated (5).

Further, in the above embodiment, the heat exchanger (4)
Was formed by the storage tank (6) containing the target liquid to be heated (5), but in the second different embodiment, as shown in FIG. 2, the heat exchanger (4) is the target liquid to be heated (5). It may be a flow pipe (10) which is inserted into the inside and through which the vapor of the fluorine-based liquid (2) is passed. This flow pipe (10) is a storage tank (6) for the target liquid (5) to be heated.
It is formed by arranging in a coil shape on the inner surface of. Also, heating tank
(1) and the flow pipe (10), which is the heat exchanger (4), are connected via a steam introduction valve (11). Further, a discharge valve (12) is provided on the steam discharge side of the flow pipe (10) which is the heat exchanger (4).
Is connected to a condenser (8) via a condenser, and the fluorine-based liquid (2) condensed and liquefied in the condenser (8) is reduced to the heating tank (1) through a pipe.

In addition, in a different third embodiment, the heat exchanger
As shown in FIG. 3, (4) is detachably connected to a flow pipe (10) in which vapor of the fluorine-based liquid (2) is circulated so that the vapor is circulated inside and the target liquid to be heated ( 5) It can be inserted into the inside. In addition, the heat exchanger of the heating tank (1)
(4) and the flow pipe (10) are connected via a steam introduction valve (11). Also, on the steam discharge side of the heat exchanger (4),
Heating tank through the flow passage (13) provided with the discharge valve (12)
The vapor of the fluorine-based liquid (2) connected to (1) and having completed heat exchange with the target liquid to be heated (5) is reduced to the heating tank (1).
Also, the flow passage between the discharge valve (12) and the heating tank (1)
A condenser (8) is connected to (13) via a communication pipe (15), and when both the introduction valve (11) and the discharge valve (12) are closed, the heating tank (1 The steam in () is guided to the condenser (8) to prevent abnormal pressurization of the heating tank (1).

[0024]

EFFECTS OF THE INVENTION Since the present invention selectively heats the fluorine-based liquid corresponding to the target heating temperature of the target liquid to be heated to the boiling point or higher, the vapor generated by this heating is
The target liquid to be heated, which is maintained at the boiling point of the selected fluorine-based liquid and is indirectly heated using this vapor, will not be heated above the boiling point of the selected fluorine-based liquid, and reliable temperature control can be performed easily. Can be done. Further, if the communication between the heating portion for the fluorine-based liquid and the storage portion for the target liquid to be heated is cut off, the heating of the target liquid to be heated is immediately stopped and the temperature can be easily controlled.

Further, since the fluorine-based liquid is heated to the boiling point under normal pressure, there is no need for a pressure boiler or the like as in the indirect heating method using steam, the equipment is small and simple, and safety is improved. It will be expensive. Further, the selected fluorinated liquid needs to be heated by the amount necessary to generate the vapor, and it is possible to heat a small amount of the fluorinated liquid and replenish the required amount sequentially, minimizing the energy used. You can Further, it is possible to accurately heat the target liquid to be heated at low cost without requiring complicated equipment such as a circulation pump for temperature control.

[Brief description of drawings]

FIG. 1 is a sectional view of a first embodiment.

FIG. 2 is a sectional view of a second embodiment.

FIG. 3 is a sectional view of a third embodiment.

[Explanation of symbols]

1 heating tank 2 Fluorine-based liquid 4 heat exchanger 5 Target liquid to be heated 6 storage tanks 10 distribution pipes 13 flow passage 14 Temperature sensor

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[Procedure amendment]

[Submission date] January 29, 2002 (2002.1.2
9)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 3

[Correction method] Change

[Correction content]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 4

[Correction method] Change

[Correction content]

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 5

[Correction method] Change

[Correction content]

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] Explanation of code

[Correction method] Change

[Correction content]

[Explanation of reference numerals] 1 heating tank 2 fluorine-based liquid 3 heating element 4 heat exchange element 5 target liquid to be heated 6 storage tank 10 flow pipe 14 temperature sensor

[Procedure amendment]

[Submission date] April 26, 2002 (2002.4.2)
6)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

However, in the indirect heating method using pressurized steam, a pressure boiler for generating pressurized steam is required, the equipment becomes large, and water is always required to be supplied to the pressurized steam generating portion. Attari, is required wastewater treatment due to drain from the pressurized steam and traps,
It has the drawback that equipment costs and management costs are large. Also, since a pressure boiler is used, it is necessary to give sufficient consideration to safety measures.

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Claims (8)

[Claims] 1. A fluorine-containing liquid having a different boiling point is selectively used to heat to a boiling point under normal pressure, and the target liquid to be heated is heated using the vapor generated by the boiling point heating. Method of heating target liquid. 2. A heating tank for selectively storing fluorine-based liquids having different boiling points and heating the fluorine-based liquid to a boiling point by a heating body under normal pressure to generate steam, and a heating tank heated by the steam of the fluorine-based liquid. A heating device for a target liquid to be heated, which comprises a target liquid to be heated and a heat exchange element for exchanging heat. 3. The fluorine-based liquid is perfluorocarbon,
The method for heating a target liquid to be heated according to claim 1, wherein one or more of perfluoropolyether, hydrofluoroether and hydrofluorocarbon are selectively used. 4. The fluorine-based liquid is perfluorocarbon,
3. The heating apparatus for heating a target liquid to be heated according to claim 2, wherein one or more of perfluoropolyether, hydrofluoroether and hydrofluorocarbon are selectively used. 5. The heat exchanger is a storage tank that stores the target liquid to be heated, and the vapor of the fluorine-based liquid is brought into contact with the storage tank to heat the target liquid to be heated inside. The heating device for the target liquid to be heated according to claim 2. 6. The heating apparatus for heating a target liquid to be heated according to claim 2, wherein the heat exchange element is a flow pipe inserted in the target liquid to be heated and allowing vapor of the fluorine-based liquid to flow therethrough. 7. The heat exchange element is detachably connected to a flow pipe in which vapor of a fluorine-based liquid is circulated so that the vapor can be circulated therein and can be inserted into a target liquid to be heated. The heating device for the target liquid to be heated according to claim 2. 8. A temperature sensor is arranged in the target liquid to be heated, and the supply of the vapor of the fluorine-based liquid to the heat exchange element is controlled according to the detection signal of the temperature sensor. 4, 5, 6 or 7 heating device for the target liquid to be heated.