JPH0240470Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention is a method for transferring water-permeable processed materials (hereinafter simply referred to as "processed materials") such as woven fabrics, knitted fabrics, non-woven fabrics, and other water-permeable films to radiant heat transfer using a far-infrared radiant heater. This is a drying device that uses a board to dry the air, and it is related to a safety mechanism that is activated when the device is brought to an emergency stop due to a mechanical failure.

"Prior art and its problems" Recently, drying equipment using such radiation heat transfer plates has been used for drying, roasting, etc. in a wide range of fields such as textiles, electronics, food, and other medical fields. It is valued for its ability to dry at low temperatures and shorten processing time, helping to reduce running costs and save energy.

By the way, when drying etc. are performed using radiant heat transfer in this way, the amount of radiant heat transfer is determined by the difference in surface temperature between the radiant heat transfer plate and the processed material, and when the processed material is transported normally, The above-mentioned surface temperature difference is maintained substantially constant, and the object to be processed is normally processed at a temperature lower than that of the radiant heat exchanger plate. However, when the apparatus comes to an emergency stop due to a mechanical failure, the processed material stops facing the radiant heat exchanger plate. Therefore, the surface temperature of the object to be treated begins to rise, and eventually rises until the temperature difference disappears.
Eventually, the temperature will be the same as that of the radiant heat exchanger plate. In this case, depending on the type of material to be processed, the processing temperature may exceed the limit, which may have various adverse effects and may lead to deterioration of quality and characteristics.

``Means for solving the problem'' Therefore, the present invention takes safety measures immediately in the above-mentioned emergency, such as rapidly cooling the radiant heat exchanger plate via a cooling medium. In a drying device for radiant heat transfer, in which a conduit for supplying a heating medium such as steam or heat medium is connected to a pair of radiant heat transfer plates arranged in This is an emergency safety mechanism in a radiant heat transfer drying device that is constructed by connecting conduits that supply cooling media such as water and refrigerant.

"Function" Next, to explain the function of the present invention, when the equipment is stopped due to an emergency failure of the machine, etc., the conduit for supplying the heating medium of the radiant heat exchanger plate that instantly uses the heating medium such as steam and heat medium as the heat source. At the same time, the valve of the cooling medium supply conduit is opened to open this cooling side conduit and start cooling. A cooling medium such as water or refrigerant is supplied to the radiant heat exchanger plate through a conduit,
Absorbs the amount of heat held by the radiant heat exchanger plate and first heats it to 100℃.
After lowering the temperature to a temperature close to that level, the above-mentioned operation is repeated to gradually lower the temperature until the temperature reaches the safe processing temperature of the material to be processed.

"Embodiments and Effects" Next, embodiments of the present invention will be described based on the drawings.

First, the first embodiment shown in FIG. 1 will be described. In a substantially closed drying chamber 1, radiant heat exchanger plates 2 and 3 are arranged facing each other.
The processing material 4 is configured to pass between the two. A conduit 5 to which steam as a heating medium is supplied is connected to one end of the radiant heat exchanger plates 2 and 3.
The other end is connected to a conduit 6 for discharging steam drain that has finished its work. In the figure, 7 is a valve provided in the conduit 5. A conduit 9 is connected between the valve 7 of the conduit 5 and the radiant heat exchanger plates 2 and 3, and is provided with a valve 8 for supplying water as a cooling medium to the radiant heat exchanger plates 2 and 3. Then, in an emergency, the valve 7 for instantly supplying steam to the radiant heat exchanger plates 2 and 3 that uses steam as a heat source.
At the same time, the valve 8 of the conduit 9 is opened to inject cooling water into the radiant heat exchanger plates 2 and 3 via the conduit 9 and the conduit 5, and the injected water is A part of the water evaporates inside the radiant heat exchanger plates 2 and 3, absorbing the amount of heat held by the radiant heat exchanger plates 2 and 3, and instantly heats the radiant heat exchanger plates 2 and 3 to about 100°C, for example. decreases to. In this way, the temperature of the radiant heat exchanger plates 2 and 3 is lowered by the water sequentially supplied to the safe processing temperature of the processed material 4. On the other hand, the water that has finished working is discharged to the outside via the conduit 6. This prevents the surface temperature of the processed material 4 from rising during an emergency stop. Next, to explain the second embodiment shown in FIG. 2, a radiant heat exchanger plate 1
The radiation heat exchanger plates 12 and 13 are arranged to face each other, and the object to be treated 14 passes between the radiation heat exchanger plates 12 and 13. A conduit 15 for supplying a heating medium as a heating medium is connected to one end of the radiant heat transfer plates 12 and 13, and a conduit 16 for discharging the heating medium after it has finished working is connected to the other end. There is. In the figure, 17 is a valve installed in the conduit 15, and 17a is the conduit 16.
17b is a heating device for a heating medium provided between the conduit 15 and the conduit 16. The conduit 15 is provided with a conduit 19 equipped with a valve 18 for supplying a refrigerant as a cooling medium to the radiant heat exchanger plates 12 and 13.
One end of the conduit 19 is connected to the conduit 16, and the other end of the conduit 19 is connected to the radiant heat exchanger plate 1.
The refrigerant discharged from 2 and 13 is led out. In the figure, 18a is a valve provided in the conduit 19, and 18b is a refrigeration device. In this example where a heating medium is used as a heat source, in an emergency, the heating medium side conduit 15,
16 valves 17 and 17a are closed, and the radiant heat exchanger plate 1
At the same time, the supply of heat medium to 2 and 13 (in the direction shown by the solid arrow) is stopped, and at the same time, the supply of heat medium to 1
9 valves 18 and 18a are opened, and the conduit 1 on the refrigerant side is opened.
9 is opened, and the refrigerant is supplied to the radiant heat transfer plates 12 and 13 through this conduit 19 (in the direction shown by the dotted arrow), and the amount of heat held by the radiant heat transfer plates 12 and 13 is absorbed and immediately radiated. The temperature of the heat exchanger plates 12 and 13 can be lowered. In this way, the temperature of the radiant heat exchanger plates 12 and 13 is lowered by the sequentially supplied refrigerant to the safe processing temperature of the processing object 14. On the other hand, the refrigerant that has finished working is transferred from the radiation heat exchanger plates 12 and 13 to the conduit 1.
9 and reaches the refrigeration device 18b, where it is cooled again and supplied to the radiant heat exchanger plates 12, 13 via the conduit 19 as described above.

"Effects of the invention" As detailed above, the present invention is configured to stop the supply of heating medium to the radiant heat exchanger plate in an emergency, and at the same time supply the cooling medium to the radiant heat exchanger plate. This has the effect of first lowering the temperature of the radiant heat exchanger plate to around 100°C, and then sequentially lowering it to the safe processing temperature of the object to be processed, thereby avoiding the adverse effects of high temperatures on the object to be processed. In particular, in drying equipment for radiant heat transfer that uses steam as a heat source, a small amount of water can be used, and almost simultaneously with the injection,
The temperature can be rapidly lowered to around 100℃.
Additionally, the injected water can be effectively recycled as part of the steam drain via the steam trap. Furthermore, since it is only necessary to connect the water supply conduit to the steam supply conduit, equipment simplification is achieved. Furthermore, when the drain temperature on the discharge side reaches the safe processing temperature of the material to be treated, the supply of water can be stopped, which has practical effects such as easy temperature control.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, with FIG. 1 being a schematic diagram and FIG. 2 being a schematic diagram showing another example. 1, 11...Drying room, 2, 3, 12, 13...
Radiant heat transfer plate, 4, 14...Processed material, 5, 6, 1
5, 16, 19... Conduit, 7, 8, 17, 17
a, 18, 18a... valve.

Claims (1)

[Scope of utility model registration request] In a radiant heat transfer drying device in which a conduit for supplying a heating medium such as steam or heat medium is connected to a pair of radiant heat transfer plates arranged in a drying chamber, the radiant heat transfer plate is connected to the radiant heat transfer plate. An emergency safety mechanism in a radiant heat transfer drying device that connects a conduit that supplies a cooling medium such as water or refrigerant to the conduit.