JPH0477224B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cooling device for cooling a workpiece within a wall surface of a workpiece holder such as a container through a wall surface of the workpiece holder.

BACKGROUND TECHNOLOGY Heat generated from the processed material is removed by cooling the processed material held in a container to a predetermined temperature or below a predetermined temperature, or through chemical and physical operations such as chemical reaction, dissolution, and dilution. Therefore, operations for controlling the temperature of a processed material to a constant level are widely practiced in various industries.

In this case, as a cooling or heat removal method, a heat exchanger such as a jacket installed around the container or a coil installed inside the container is used as a heat medium (heat transfer device) whose temperature is lower than the temperature of the object to be processed inside the container. Depending on the temperature and cooling temperature, a type of heat medium that matches the purpose is selected from among various heat media such as organic refrigerant, inorganic refrigerant, chilled water, cooling water, hot water, steam, and organic heat medium.) is used as a heat medium outside the container. Generally, the temperature of the object to be processed in the container is lowered by supplying the object through equipment and transferring heat from the high temperature object to be processed in the container to a low-temperature heat medium. Furthermore, when controlling the temperature to a constant predetermined temperature, the temperature of the object to be processed in the container is measured, and the temperature, flow rate, pressure, etc. of the heat medium are adjusted according to the difference between this measured value and the predetermined temperature. A method is generally used in which the temperature of the object to be processed in the container is kept constant.

However, all of these cooling methods use sensible heat based on the temperature difference between the object to be processed and the heat medium, so the response is slow and they are not suitable for purposes such as heat removal from chemical reactions that generate intense heat. It has an essential drawback that it cannot be addressed. (If condensable steam is used as a heat medium, latent heat will be used when heating, but latent heat cannot be used when cooling.) Also, depending on the type of heat medium, hot water boilers, hot water boilers,
Various auxiliary equipment such as heat medium boilers, cooling equipment, refrigeration equipment, heat medium tanks, piping, etc. are required, and as the amount of heat medium held increases, the heat capacity of the heat medium increases, and the temperature of the heat medium itself increases. It also has the drawback of poor responsiveness to changes.

In order to improve the above-mentioned drawbacks and speed up the response, it is possible to supply a cooling heat medium different from that used during heating to the heat exchanger such as the jacket or coil during cooling, or to use a jacket during heating. However, as in the case of using an in-vessel coil during cooling, dedicated heating and cooling heat medium facilities are provided for cooling and heating, respectively. In addition, the material to be processed inside the container is supplied to a heat exchanger with a large heat transfer area installed outside the container, and the material to be processed is cooled and removed by circulating between the container and the external heat exchanger. Heating is also often done.

However, in this case as well, cooling is the use of sensible heat, and this is only achieved by increasing the temperature difference or increasing the heat transfer area, and does not solve the inherent inefficiency. do not have. Furthermore, as in the case of stirring high viscosity liquids, it may be possible to install a heat exchanger such as a coil inside the container, or even if it is possible, a sufficient heat transfer area may not be available. Furthermore, depending on the nature of the material to be treated inside the container, it may be inappropriate to circulate the material to the outside. Even if we try to increase the heat transfer area in order to improve responsiveness during cooling, it is often impossible due to various constraints, and as expected, it is not possible to do so for purposes such as heat removal or rapid cooling when the amount of heat generated is large. There are some drawbacks that cannot be addressed.

Problems to be Solved by the Invention The present invention uses condensable steam as a heat medium to control the temperature inside a container to a predetermined temperature,
The cooling operation required to bring the temperature below a specified level,
Using the latent heat of vaporization when the condensed liquid evaporates,
The aim is to achieve extremely fast response speed.

Means for Solving the Problems The present invention provides a heat exchange device for condensing vapor provided in a condensable vapor phase in contact with a wall surface of a workpiece holder, and a heat exchange device for condensing vapor condensed by the heat exchange device. It consists of a liquid collecting and rectifying device for collecting and rectifying the liquid, and a processing object holder having a wall surface through which the collected and rectified condensed liquid flows down, and the collected and rectified condensed liquid is distributed as uniformly as possible on the wall surface. The object to be processed is caused to flow down in the form of a film or drops, and the latent heat of evaporation when the condensed liquid evaporates through the wall surface due to the amount of heat held by the object to be processed in the object holder is used to cool the object to be processed. The present invention relates to a cooling device characterized in that it is configured to cool. In this case, it is more effective to eliminate as much non-condensable gas as possible from the condensable vapor.

Here, the term "liquid collection and rectification device" refers to a liquid collection and flow guiding device that collects condensed liquid and directs the flow in a certain direction (in this case, the direction of the wall surface of the object holder). same as below.

Specifically, in a container with a jacket, when condensable steam such as water vapor is supplied to the jacket chamber to heat the object to be treated inside the container, the heat exchange device and the liquid collecting and rectifying device of the present invention can be used. When installed in the jacket chamber, latent heat can be used not only during heating but also during cooling, so the response is extremely fast and it is suitable for various operations such as chemical reactions, melting, dilution, etc. that generate a large amount of heat, and quenching operations. In this case, the heat exchange device may be configured by supplying a cooling heat medium from the outside to a coil-type heat exchanger installed by winding pipes around the container body wall in a jacket chamber, and The device installs a plate-shaped object, such as a flat plate or a corrugated plate, along the pipe of the coil of the coil type heat exchanger at the bottom of the pipe, and further slopes it toward the wall surface of the container body. A small gap may be maintained between the pipe and the condensate that condenses on the pipe surface and falls so that it flows almost uniformly down the wall surface of the container body in the form of a film or drops. At this time, the plate-shaped liquid collecting and rectifying device is a plate-like liquid plate with a small pitch or a folded plate-like uneven plate in order to prevent the condensed liquid from flowing in the circumferential direction and not flowing uniformly on the wall surface of the main body of the container. It is better to use It is also more effective to roughen the wall surface of the container body through which the condensate flows down with a grinder or sandblast, add vertical lines, or create a pear pattern.

When attempting to heat the object to be processed in the holder using the cooling device of the present invention, the supply of the cooling heat medium to the cooling coil of the heat exchange device must be stopped, and heated condensable steam must be blown into the jacket chamber. Bye. Then, the condensable vapor condenses on the wall surface of the workpiece holder, which serves as a heat transfer surface, and the workpiece can be heated by the latent heat of condensation.

Embodiment An embodiment of the present invention will be explained with reference to FIG.
A cooling heat exchange device 6 is provided inside a jacket chamber 2 provided on the outer periphery of the container body 1. The heat exchange device 6 is composed of, for example, a pipe 7, which is wound around the outer periphery of the outer wall surface 5 of the container body in a coiled manner. At this time, the pipe 7 and the outer wall surface 5 are installed with an appropriate gap so that they do not come into contact with each other. A cooling heat medium for condensing condensable steam is supplied to the pipe 7, and 10 is an inlet and an inlet for the supply. Immediately below the pipe 7, a liquid collecting and rectifying device 8 is installed to collect the condensed liquid and cause it to flow down onto the outer wall surface 5 of the container body. The liquid collecting and rectifying device 8 is made of, for example, a corrugated plate 9, and is installed in a spiral manner along the pipe 7 at the lower part of the pipe. The corrugated plate 9 has an appropriate slope with respect to the outer wall surface 5 in order to allow the collected condensate to flow down to the outer wall surface 5 of the container body. Maintain and install.

In the above configuration, water vapor is supplied to the jacket chamber 2 as condensable steam (in order to eliminate as much non-condensable gas as possible within the jacket chamber, it is better to blow the jacket chamber with steam in advance), The object to be processed 4 inside the container is heated or maintained at a predetermined temperature. Here, when cooling the object 4 to be processed or removing heat generated from the object 4 such as reaction heat or heat of dissolution, a cooling heat medium such as water is supplied to the pipe 7 . When water is supplied, the water vapor in the jacket chamber 2 immediately condenses on the surface of the pipe 7, falls down and is collected by the corrugated plate 9, and flows through the gap between the corrugated plate 9 and the outer wall surface 5 of the container body into the outer wall surface 5. The water flows down almost uniformly in the form of a film or droplets. While flowing down, the condensed liquid is evaporated by the heat received from the high temperature workpiece 4 inside the container, and at this time, the latent heat of vaporization is taken away from the workpiece 4, and the temperature of the workpiece 4 drops extremely quickly. At this time, rather than stopping the supply of water vapor, it is necessary to supply the amount necessary for the water vapor to condense and wet the wall surface almost uniformly. In practice, when removing generated heat such as controlling the reaction temperature, the temperature of the material to be treated 4 immediately decreases by supplying water to the pipe 7 without changing the amount of water vapor supplied. do.

FIG. 2 shows another embodiment of the invention in which the workpiece can be continuously cooled by latent heat.
In this embodiment, the object to be treated holder 1 has a double tube structure, and the object to be treated 4 flows continuously within the annular gap of the double tube. A cooling coiled pipe 7 and a spirally wound corrugated plate 9 provided below the pipe are installed on both sides of the double pipe. In this embodiment, condensable steam supplied to the jacket chamber 2 condenses on the surface of the cooling pipe 7 and is guided by the corrugated plate 9 for liquid collection and rectification according to the same principle as the embodiment shown in FIG. While flowing down along the wall surface 5 of the double tube 1, it is evaporated again by the heat received from the object to be treated 4, and at this time, the latent heat of vaporization is taken away from the object to be treated.

The embodiment shown in FIG. 2 is advantageous when the object to be treated is used as a heating medium for temperature control in a reaction device or the like, when the object to be treated is rapidly cooled, or when the temperature is frequently changed.

Effects of the Invention As described in detail above, according to the present invention, when cooling a workpiece to control the temperature of the object to be treated or to lower it to a predetermined temperature using condensable steam as a heat medium, the condensable vapor phase A heat exchange device for condensing steam inside the heat exchange device, and a liquid collection and rectification device for collecting and rectifying the condensed liquid at the bottom of the heat exchange device are installed to direct the condensed liquid to the outer wall surface of the object holder as much as possible. The object to be processed can be cooled using the latent heat of evaporation when the condensed liquid evaporates due to the amount of heat held by the object to be processed by causing the condensate to flow down uniformly in the form of a film or drops. Therefore, there is an effect that the object to be processed inside the holding body can be cooled quickly.

In practice, when condensable steam such as water vapor is used as a heat medium, by incorporating the heat exchange device and liquid collection rectifier described above into the jacket, latent heat can be absorbed not only during heating but also during cooling. If a cooling heat medium such as water is passed through the heat exchange device, the condensable vapor will immediately condense, flow down the outer wall surface of the object holder, and absorb the latent heat of vaporization from the object therein. Since the device takes away the heat, it becomes a device with an extremely quick thermal response, and has the advantage that it can be applied as a temperature control device for chemical reactions that generate a large amount of heat.

[Brief explanation of the drawing]

1 and 2 are longitudinal sectional views showing an embodiment of the present invention. 1 is a container body, 2 is a jacket chamber, 4 is an object to be treated, 6 is a heat exchange device, 8 is a liquid collecting and rectifying device, and 11 is an inlet/outlet for supplying condensable steam to the jacket chamber.

Claims (1)

[Scope of Claims] 1. A workpiece holder having a wall surface serving as a heat transfer surface, a jacket chamber provided in contact with the wall surface of the workpiece holder, and supplying condensable steam into the jacket chamber. a heat exchange device provided in the jacket chamber for condensing the condensable vapor; a device for collecting condensate that has coagulated by the heat exchange device; A flow guide device is provided for directing the flow of the collected condensate flowing down along the wall surface of the processing object holder toward the wall surface, and the condensate liquid is caused to flow down the wall surface in the form of a film or droplets. , when the condensed liquid evaporates via the wall surface by the amount of heat held by the workpiece in the workpiece holder, the workpiece is cooled by the latent heat of vaporization taken away from the workpiece. A cooling device characterized by the following.