JPS5912753A - Method and apparatus for removing moisture adhered to surface of matter and simultaneously controlling temperature thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention The present invention relates to a method for removing moisture adhering to the surface of an object and at the same time adjusting the surface temperature of the object to a predetermined value. This temperature adjustment is also called tempering. The invention relates to a device for the same purpose.

As is well known, this technical process includes washing and drying, i.e., moisture removal operations and its temperature regulating operations. In the manufacture of electric discharge lamps such as neon tubes, for example, cleaning and drying steps are followed by vacuum deposition. For this latter vacuum deposition it is necessary to preset the temperature of the tube.

In all such cases, drying and tempering of the surface of the object to be treated is carried out in two separate operations. Moisture adhering to the object surface is removed by diffusion drying, and the surface temperature is adjusted to a predetermined value by a heating process.

The efficiency of diffusion drying is determined, in part, by the temperature of the drying medium. Therefore, relatively warm drying media are used in order to shorten the operating time and reduce the size of the drying device. As a result, the surface temperature of the dried object is high after drying. In order to reach the optimum surface temperature of the engineer, the surface of the dried object must be sufficiently cooled.

As is clear from this, the object to be processed is dried (
This results in the object being warmed) and then tempered (i.e. cooled).
large amounts of energy are consumed. The high temperature of an effective drying bath is contrasted with the low temperature of an effective tempering bath. In order to remedy this drawback, these optimum temperature levels were sought, but in most cases they were configurable and merely a compromise was reached. Therefore, the above contradiction could not be resolved.

It is therefore an object of the invention to provide a method in which the operations of object drying and subsequent surface temperature adjustment are not mutually exclusive, ie, the first operation is not detrimental to the second.

The basic idea of the invention is to use a drying method using an air stream or a steam stream instead of diffusion drying.

As a result of this consideration, there is another objective to be achieved by the present invention. Another object is therefore to provide a method in which the drying and temperature conditioning steps are carried out in one and the same operation.

As is well known, a pressure drop in a fluid medium flowing along one medium (a second medium) induces a force perpendicular to the direction of flow. As a result of this force, the fluid medium
It tends to carry away the fi quality with it. If this second medium is moisture adhering to the surface of the object to be dried, and if the fluid S is air or steam, the moisture can be removed without the need for other drying methods such as diffusion drying. removed from the object surface. In other words, the removal of moisture is possible not only by a heating step, ie by increasing the surface temperature of the object, but also by an appropriate reduction in the pressure of the fluidizing medium.

Furthermore, if the temperature of the fluidizing medium is within a narrow range of the predetermined surface temperature of the tempering, drying and temperature regulation can be achieved simultaneously in the same working operation.

For realization, extensive research and experimental activities were initiated by the applicant in order to find a good flow/mother turn and to this end determine the flow rate of the fluid medium.

If air or steam is flowed along the surface of the object to be treated, if the temperature of the air or steam is within ±10°C of the surface temperature to be achieved, δ et al. It has been found that the above objective can be easily achieved if the average velocity of steam has the following objective: where vl is the average flow velocity of air or steam, g is the weight acceleration (g = 9.81 m ,/s), tv
is the dynamic viscosity of moisture in the state of removal, G, Vi, the specific weight of air or steam in the state of moisture removal, vvl is the flow velocity of moisture at radius R1, R5 is the hydraulic radius of the wetted surface, R1 is moisture and air or the hydrodynamic radius of the interface with steam, fl is the saturation degree of air or steam (relative humidity with the maximum value of l)
, C is a constant calculated as follows, where 0.0015 (K (3 is the modified resistance coefficient).

Another object of the present invention is to provide an apparatus that removes moisture adhering to the surface of an object and at the same time adjusts the surface temperature of the object to a certain value.In order to easily achieve this object, Guide air or steam along the surface of the object to be treated 1
A nozzle or nozzles are provided, the air or steam having a temperature within ±10° C. of the surface temperature to be achieved.

Other objects, features and advantages of the invention will be described in detail below with reference to illustrative embodiments and with reference to the accompanying drawings.

As is clear from the above, in order to achieve the object of the present invention, at least two conditions must be satisfied. That is, the temperature of 1 ftNh air or steam must be within a temperature range of ±10°C of the surface temperature achieved, while the average flow velocity V1 is determined by The value must be the same as the original value. For this purpose one or more nozzles are essential. Also, in most cases, the pressure and temperature of the air or steam available is not convenient for the purposes of the present invention. To modify these properties, heat exchangers and media transporters are required.

In FIG. 1, reference number 1 is a medium transfer device, 2 is a heat exchanger, 3 is a nozzle, and 4 is an object to be processed, that is, a workpiece. These members are connected in a continuous manner in this description. The workpiece 4 is here a hollow object, for example a tube, from the inside of which moisture is removed. The medium transfer device I and the nozzle 3 create an average velocity v1 and a flow pattern inside the tube. By heat exchanger 2, R1
A constant temperature can be obtained. The nozzle 3 blows air or steam towards the tubular workpiece 4 at the required velocity and temperature. Air or steam flowing through the workpiece is reduced in pressure by a predetermined amount. As a result, the average speed (1) is calculated. As mentioned above, this pressure drop causes the flowing medium to carry away moisture adhering to the surface of the object along with the medium itself. Moisture adhering to the inner surface of the tubular workpiece 4 is thus "blown out" by air or steam. Also, during this moisture removal, the object surface temperature reaches a predetermined value according to the requirements of the next technological process. Thus, in one and the same operation, moisture is removed and the surface temperature is adjusted. The medium passage of air or steam passing through the workpiece 4 is 6.
The liquid path passing through the workpiece 4 is indicated by a dotted line δ.

In FIG. 2 the nozzle 3 and the workpiece 4 are shown in cross section. In this embodiment, the heat exchange resin 2 is connected in front of the medium transfer device l, and the mist separator 12 is connected to the tubular workpiece ←
It is placed above the liquid passage 5 and medium passage 6 that have passed through the vessel to separate the liquid in the flowing gas or vapor. Thereafter, the air used in the process is transferred and reused.

In the embodiment of FIG. 3, the nozzle 3 is provided in a seal or gasket 7, which is connected to the workpiece 4.
is interconnected between the inner surface of the nozzle 3 and the nozzle 3. This configuration prevents backflow of the fluid medium and provides a good flow pattern within the workpiece 4. Furthermore, a suction nozzle 8 is arranged behind the workpieces 4, by means of which, even in the case of long workpieces 4, an optimum 70-knot or turn is maintained in the final part of these workpieces.

In FIG. 4, the suction nozzle 8 as well as the nozzle 3 and the workpiece 4 are shown in cross section.

In this embodiment, a mist separator as in FIG. 2 is connected behind the suction nozzle 8.

In the case of FIG. 5, a hollow workpiece 4 is shown which has a cross-sectional shape different from that of the tube. The air or steam used here is
A heat exchanger is not suitable in this circulation system if it has a temperature within ±10° C. of the surface temperature of the workpiece 4 to be reached. However, the moisture removed from the inner surface of the workpiece 4 tends to drip or flow back onto the outer surface of the open end of the workpiece 4. In order to prevent this phenomenon, auxiliary nozzles 9 are provided in the turn at the open end of the workpiece 4, and the medium passages 6 of these auxiliary nozzles allow water to flow out together with the medium. The nozzle 3 and the auxiliary nozzle 9 are connected in parallel to the medium transfer device 1 .

In the case of the cup-shaped workpiece 4 in FIG. 6, a long nozzle 3 is used which directs the air or steam from the medium transfer device 1 to the inside of the cup. The opening of the cup-shaped workpiece 4 is closed by a gasket 7, through which air and moisture removed from the inner surface of the cup are discharged.

The same type of nozzle 3 with a different gasket 7 and spherical workpiece 4 is shown in FIG.

The medium channel 6 and the liquid channel 5 are discharged through an outlet hole 10 provided in the workpiece 4 itself.

In the embodiment shown in FIG. 8, a system is shown in which the inner surface and simultaneously the outer surface of the workpiece 4 are covered. A rod-shaped workpiece and a tubular workpiece are arranged in the hollow guide piece 15, inside which a medium transfer device 1, such as a blowing fan, is arranged.
The desired flow rate and pattern are created by the nozzle 3, the strip 16 which increases the resistance to the flow of the medium and is attached to the inner surface of the hollow guide piece 15, and the suction nozzle 8. The flowing air or steam enters the hollow guide piece 15, passes through this guide piece and then flows through the suction nozzle 8 as well as through the mist separator 12. During this time, the workpiece 4
The moisture adhering to the inner and outer surfaces of the mist separator 12 is removed, and the liquid is separated from the air in the mist separator 12.

In FIG. 9, a workpiece 4 is illustrated whose length in the direction perpendicular to the flow direction of air or steam is much larger than its length in the flow direction. To create a complex flow pattern, pieces 16 are arranged inside the workpiece 4 to increase the flow resistance.

In this case, the piece 16 acts as a kind of blockage or throttle valve that reduces the pressure of the air or steam flowing along the workpiece 4 as required. Further, auxiliary nozzles 9 are arranged, and their purpose and function are the same as in the case of FIG. However, in this case, these auxiliary nozzles 9
It is connected to a separate blow transfer device 14 which supplies air or steam to the auxiliary nozzle.

Furthermore, the auxiliary nozzle has a compatible tip 11 according to which the flow of the auxiliary nozzle 9 (
It is always possible to adapt the turns to the special requirements of the various workpieces 4. The liquid oil 1tlt' 55 and the medium passage 6 of this system pass through the mist separator 12.

In the embodiment of FIG. 10, the medium transfer device allows υ flowing air or! /i steam is supplied through the exchanger 2 to the plurality of nozzles 3, the workpiece 4, the auxiliary nozzle 9 and the suction nozzle 8. On the outlet side of this embodiment, the suction nozzle 8 is connected δ to a conventional fog separator 12, in which the liquid channel 5 is separated from the medium channel 6.

FIGS. 11 and 12 illustrate a misfire [l! The system of Ij is shown.

The liquid removed from the surface of the workpiece 4 passes through a mist separator and is discharged in a liquid passageway 5. In FIG. 12, an auxiliary nozzle 9 is also provided.

This FIG. 12 shows a system similar to that of FIGS. 11 and 14, but the medium passage 6 is not shown. Here, a suction transfer device 13 is provided, by which the air that has passed through the fog separator 12 is conveyed out of the system, for example into the atmosphere.

As is clear from FIG. 15, the suction transfer device 13 can also be used to transfer the medium channel 6 to the medium transfer device I in the system shown in FIG.

Additionally, the auxiliary nozzle of FIG. 14 can also be used with a separate blow transfer device 14 as shown in FIG. 16. The auxiliary nozzle can also be connected to the medium passage 6 at the outlet of the mist separator 12 via the suction transfer device 13 .

In this case, pressurized recycled air is supplied to the auxiliary nozzle 9 by the suction transfer device 13 as required.

If the air or steam used in the present invention has the desired temperature and the geometry of the nozzle 3 and workpiece 4 is usable, then the desired flow rate within the system, as shown in FIG. and to generate Flowno 9 turns, 1
Only one suction transfer device 13 is sufficient.

As illustrated in FIG. &V19, one or more workpieces 4 are processed by one nozzle 3 and one suction nozzle 8, which have an unconventional shape.

The embodiment described above is only amenable to modification within the scope of the specific H'F pursuit of the present invention.

[Brief explanation of drawings]

1 to 19 show schematic illustrations of various embodiments of the invention. DESCRIPTION OF SYMBOLS 1... Medium transfer machine, 2... Heat exchanger, 3... Nozzle, 4... Workpiece, 5... Liquid passage, 6... #-
Quality communication path 8...Suction nozzle, 9...Auxiliary nozzle,
12...Mist separator. Patent Applicant Pudapestei Musaki Enoetem Patent Application Agent Akira Aoki Patent Attorney Kazuyuki Nishidate Patent Attorney Kyo Nakayama Patent Attorney Akira Yamaguchi 3rd, Figure 7. En No. 81 Zukyo 9.3 No. 198 No. 510.1 No. 5111 No. 5131 No. 150 No. 16. ] Continuing from page 1 of 17th country Inventor István Fredrik Hungarian H2100 Gódollo Munkachii Utsza 3 Ny 1:

Claims (1)

[Claims] 1. In a method for removing moisture attached to the surface of an object and at the same time adjusting the surface temperature of the object to a predetermined value, the temperature is within ±10°C of the surface temperature to be achieved. Air or steam is flowed along the surface of an object, and the flow velocity of this air or steam is expressed in the following two equations, where nu is the average flow velocity of air or steam, g is the weight acceleration (g = 9.81 m/s ), tv is the dynamic viscosity of water in the state of removal, G1 is the specific weight of air or steam in the state of removal of water, vv is the flow velocity of water at radius R4, Rb is the hydraulic radius of the wetted surface, R1 is the hydrodynamic radius of the interface between moisture and air or steam, f is the saturation of air or steam (relative humidity with a maximum value of 1)
, C is a constant calculated as follows, where 0.0015 (K<3 is the modified drag coefficient). 2. A method in which air or steam is or multiple nozzles,
Claim 1, characterized in that it is passed through a medium transfer device and/or a heat exchanger and/or a fog separator.
The method described in section. 3. In a device that removes moisture adhering to the surface of an object and at the same time adjusts the surface temperature of the object to a predetermined value, air or steam whose temperature is within ±10°C of the surface temperature to be achieved, A device characterized in that a single nozzle or a plurality of nozzles are provided for conveying fluid along the surface of an object. 4. The device according to claim 3, characterized in that a heat exchanger is provided and one or more nozzles are connected to the outlet side of the heat exchanger. 5. A medium transfer device for air or steam is provided between the heat exchanger and the nozzle or nozzles;
The device according to claim 3 or 4, wherein the device is connected to the inlet side of a heat exchanger. 6. The apparatus according to any one of claims 3 to 5, wherein the mist separator is provided in the medium outlet passage of the apparatus of the present invention itself behind the object to be treated. . 7. Device according to any one of claims 3 to 6, characterized in that one suction nozzle or a plurality of suction nozzles are provided in the medium passage. 8. Any one of claims 3 to 7, characterized in that the auxiliary nozzle or a plurality of auxiliary nozzles is provided near the end of the object to be treated near the exit of the device itself. The device described in Crab. 9. The apparatus according to any one of claims 3 to 8, characterized in that a gasket is provided between one or more nozzles and the object to be treated. 10. The apparatus according to any one of claims 3 to 9, characterized in that a hollow guide piece is provided for accommodating the object to be processed. 11. Claim 3, characterized in that the blowing medium transfer device is connected to one or more auxiliary nozzles and/or the suction medium transfer device is connected to one or more suction nozzles. The device according to any one of items 1 to 10gj. 12. The apparatus according to any one of claims 3 to 11, characterized in that a piece that increases the resistance of the medium is provided in the passage of the medium near the surface of the object to be treated. . 13. Claims 3 to 1, characterized in that the one or more auxiliary nozzles have replaceable tip pieces.
The device according to any of Item 2.