JP3991126B2 - Ozone adsorption tower - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an ozone adsorption tower.
[0002]
[Prior art]
Highly safe ozone is being used in place of conventional chlorine and the like for pulp bleaching, sterilization and deodorization in water treatment, and decomposition of organic substances in sewage treatment. However, the disadvantage of introducing ozone is that the initial cost and running cost of oxygen production and ozone production are high. As a technique for solving both of these problems, the inventors of the present application have previously disclosed JP-A-7-144903 ( Title of invention: “Ozone generation concentrator”).
[0003]
As shown in FIG. 4, this apparatus includes an oxygen production machine 1, an ozone generator 2, an ozone concentrating device 3, and a reaction tower 4. Oxygen is produced by adsorption, and this oxygen is supplied to the ozone generator 2 where it is ionized to generate ozone. The ozone concentrator 3 is composed of two ozone adsorption towers 7a and 7b filled with silica gel or the like, and the generated ozone is introduced and adsorbed into one of the ozone adsorption towers 7a and 7b (for example, 7a). Then, it is recycled to the ozone generator 2 and reused. In the other adsorption tower (for example, 7b), nitrogen desorbed from the nitrogen adsorption towers 5a and 5b is introduced from the carrier gas line 9, and the adsorbed concentrated ozone is desorbed and sent to the reaction tower 4. With this configuration, by alternately switching the nitrogen adsorption towers 5a and 5b and the ozone adsorption towers 7a and 7b, adsorption and desorption are alternately performed, and concentrated ozone is continuously supplied to the reaction tower 4. .
[0004]
[Problems to be solved by the invention]
The ozone adsorption tower is filled with silica gel, and the adsorption / desorption amount of ozone is controlled by adjusting the pressure in the ozone adsorption tower and the temperature of the silica gel. The container of the ozone adsorption tower is usually made of stainless steel or the like, and the inside of the container is passed through a cooling pipe and a heating pipe. The silica gel is heated by heat transfer from the heating pipe and cooled by heat transfer to the cooling pipe. It is supposed to be.
[0005]
However, silica gel is usually in the form of powder or particles, and is only in point contact with each other. The heating / cooling efficiency of the silica gel by the heating tube / cooling tube (heat transfer tube) is poor, and heating / cooling takes time, In addition, there is a problem that it is difficult to increase the size of the ozone adsorption tower.
[0006]
In order to solve this problem, in the “Ozone adsorption / desorption tower” (Japanese Examined Patent Publication No. 62-59045), a plurality of heat conduction plates are welded and fixed in parallel to the heating pipe / cooling pipe to increase the heat transfer area. In addition to increasing the heating / cooling efficiency, each of the heat conducting plates is provided with a large number of holes, and silica gel can be filled by dropping the silica gel downward through the holes.
[0007]
Ozone adsorbents (silica gel, etc.) will deteriorate with repeated adsorption and desorption and need to be replaced in a certain period. However, in the ozone adsorption / desorption tower of Japanese Examined Patent Publication No. 62-59045, since a horizontal heat conduction plate is welded and fixed to a vertically extending heating / cooling tube, replacement of silica gel through a hole in the heat conduction plate (filling, There was a problem that it took time to discharge and maintenance was difficult.
[0008]
The present invention has been made to solve such problems. That is, an object of the present invention is to provide an ozone adsorption tower which has high silica gel heating and cooling efficiency, can be easily replaced (filled and discharged), and can be easily maintained.
[0009]
[Means for Solving the Problems]
According to the present invention, the heat transfer tube includes a hollow container and a heat transfer tube passing through the hollow container, and the heat transfer tube has a vertical portion, and a heat conduction plate extending in the axial direction of the heat transfer tube is fixed to the vertical portion. The heated or cooled heat medium passes through the heat transfer tube, the ozone adsorbent is filled around the heat transfer tube in the hollow container, and the adsorption / desorption gas flows through this part ,
The hollow container has a lid member that is removable with respect to the upper surface that is opened, and the lid member is provided with a heat transfer tube inlet and a heat transfer tube outlet,
The heat transfer tube extends into the hollow container through the heat transfer tube inlet of the lid member and out of the hollow container through the heat transfer tube outlet of the lid member;
A bowl-shaped container in which an ozone adsorbent is housed and an adsorption / desorption gas can flow is provided in the hollow container,
An ozone adsorption tower is provided , wherein an upper portion of the bowl-shaped container is opened, and the heat transfer tube is positioned inside the bowl-shaped container .
[0010]
According to the configuration of the present invention, since the heat conductive plate extending in the axial direction is fixed to the vertical portion of the heat transfer tube by welding or the like, the heat transfer area is increased and the heating / cooling efficiency can be increased. In addition, since this heat conduction plate extends perpendicularly to the axial direction of the heat transfer tube, by supplying ozone adsorbent between the heat conduction plates, the heat conduction plate can easily fall down without providing holes and efficiently fill can do. Similarly, by discharging the ozone adsorbent from below the hollow container, the ozone adsorbent between the heat conducting plates can be smoothly lowered and discharged. Therefore, the ozone adsorbent can be easily replaced during maintenance.
[0011]
Further, the ozone adsorbent can be replaced by removing the hollow container with the heat transfer tube inlet / outlet (pipe, etc.) attached to the lid member .
[0012]
Furthermore, the basket-like container can be brought under ozone adsorbent, it is possible to exchange the ozone adsorbent more easily.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Reference examples and preferred embodiments of the present invention will be described below with reference to the drawings. In addition, the same code | symbol is attached | subjected and used for the common part in each figure. FIG. 1 is a block diagram showing an ozone adsorption tower according to a reference example . In this figure, the ozone adsorption tower 10 is made of a heat transfer tube 14 that passes through the hollow vessel 12 and the hollow vessel 12. The heat transfer tube 14 has a vertical portion 14a, and a heat conduction plate 16 extending in the axial direction of the heat transfer tube (vertical direction in this figure) is fixed to the vertical portion 14a by welding or the like.
[0014]
In this example, the hollow container 12 is a cylindrical container, and has a flange 12a at the top and bottom, and the adsorption / desorption gas 11 flows in / out through an inflow / outflow port 13 provided in the flange 12a. . Here, the adsorption / desorption gas 11 is a gas that flows for the adsorption / desorption of ozone, and means ozone gas, carrier gas (oxygen or dry air, etc.), and the like.
[0015]
In this example, the heat transfer tube 14 enters the body portion 12b of the hollow container 12 and exits from the body portion 12b. The heat transfer tube 14 is made of a metal material (for example, aluminum or stainless steel) that has a high thermal conductivity and is not affected by ozone. A heat medium heated or cooled from a heating / cooling device (not shown) passes through the heat transfer tube 14. As the heat medium, for example, a refrigerant such as Freon, hot / cold water, oil, or the like can be used.
[0016]
The heat conduction plate 16 is preferably made of the same material as the heat transfer tube 14, and one end thereof is fixed by the heat transfer tube 14. The heat conduction plate 16 is preferably a vertical flat plate, but may be slightly inclined from the vertical.
Further, an ozone adsorbent 15 is filled around the heat transfer tube 14 in the hollow container 12. The ozone adsorbent 15 is powdery or granular silica gel (preferably high-purity silica gel). The silica gel can be exchanged by filling / discharging from the adsorbent filling / discharging ports 12c, 12d provided in the flange 12a.
[0017]
With the configuration described above, ozone adsorption / desorption can be controlled by passing a heated or cooled heat medium through the heat transfer tube 14 and adjusting the temperature of the silica gel. Further, since the heat conduction plate 16 extending in the axial direction is fixed to the vertical portion 14a of the heat transfer tube 14 by welding or the like, the heat transfer area is increased, and the heating / cooling efficiency can be increased. Further, since the heat conduction plate 16 extends perpendicularly to the axial direction of the heat transfer tube 14, by supplying the ozone adsorbent 15 from the filling port 12c between the heat conduction plates, the heat conduction plate 16 can be easily formed without providing a hole. It can drop down and fill efficiently. Similarly, by discharging the ozone adsorbent 15 from the discharge port 12d below the hollow container 12, the ozone adsorbent 15 between the heat conducting plates 16 can be smoothly lowered and discharged. Therefore, the ozone adsorbent can be easily replaced during maintenance.
[0018]
2A is a diagram showing another reference example, and FIG. 2B is a diagram showing an embodiment of the present invention . 2A and 2B, the hollow container 12 has a detachable lid member 12a (for example, a flange) on the upper surface, and the heat transfer tube 14 and the inlet / outlet 13 of the adsorbing / desorbing gas 11 on the lid member 12a. Is provided. Further, in FIG. 2 (B), the adsorption-desorption gas 11 housing the ozone adsorbent 15 has a basket-like container 17 can flow. This bowl-shaped container 17 has fine eyes (openings) through which the ozone adsorbent 15 cannot pass, has an upper opening, and is filled with the ozone adsorbent 15 inside, and its upper edge is a hollow container. 12 is sandwiched between the upper end of 12 and the lid member 12a. Other configurations are the same as those of the reference example of FIG.
[0019]
With this configuration, the ozone ozone adsorbent 15 can be replaced by removing the hollow container 12 or 12a while attaching at least one of the heat transfer tube 14 and the inlet / outlet port of the adsorbing / desorbing gas (the piping thereof) to the lid member 12a. . Moreover, the ozone adsorbent 15 can be handled collectively by the bowl-shaped container 17, and replacement | exchange of an ozone adsorbent can be performed more easily.
[0020]
FIG. 3 is a diagram showing another reference example . In this figure, the hollow container 12 has a detachable lid member 12a on the lower surface, and both the heat transfer tube 14 and the inlet / outlet port 13 of the adsorption / desorption gas 11 are provided on the lid member 12a. Further, in this example, the heat transfer tube 14 also enters the lid member 12a and comes out of the lid member 12a. In this example, the bowl-shaped container 17 includes a cylindrical member 17a connected to the lid member 12a and a mesh 17b removably attached to the top and bottom of the cylindrical member 17a. Other configurations are the same as those of the reference example of FIG.
[0021]
With this structure, the ozone adsorbent 15 is replaced by removing the body portion 12b of the hollow container 12 while the heat transfer tube 14, the inlet / outlet port 13 (piping thereof) and the heat transfer tube 14 are also attached to the lid member 12a. The ozone adsorbent 15 can be handled collectively by the bowl-shaped container 17, and the ozone adsorbent 15 can be replaced more easily.
[0022]
In addition, this invention is not limited to embodiment mentioned above, Of course, it can change variously in the range which does not deviate from the summary of this invention.
[0023]
【The invention's effect】
As described above, the ozone adsorption tower of the present invention has excellent effects such as high heating and cooling efficiency of silica gel, easy replacement (filling and discharging) of silica gel, and easy maintenance.
[Brief description of the drawings]
1 is a block diagram showing a reference example of ozone adsorption tower.
2A is a diagram showing another reference example, and FIG . 2B is a diagram showing an embodiment of the present invention .
FIG. 3 is a diagram showing another reference example .
FIG. 4 is a configuration diagram of an ozone generator according to the prior application of the present inventors.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Oxygen production machine 2 Ozone generator 3 Ozone concentrator 4 Reaction tower 5a, 5b Nitrogen adsorption tower 7a, 7b Ozone adsorption tower 8 Circulation line 9 Carrier gas line 10 Ozone adsorption tower 11 Adsorption / desorption gas 12 Hollow container 12a Cover member (flange) )
12b Body 12c Adsorbent filling port 12d Adsorbent discharge port 13 Adsorption / desorption gas inflow / outflow port 14 Heat transfer tube 14a Vertical portion 15 Ozone adsorbent 16 Heat conduction plate 17 Bowl-shaped container

Claims (1)

It consists of a hollow container and a heat transfer tube passing through the hollow container, and the heat transfer tube has a vertical portion, and a heat conduction plate extending in the axial direction of the heat transfer tube is fixed to the vertical portion and heated or cooled. The heat medium passes through the heat transfer tube, the ozone adsorbent is filled around the heat transfer tube in the hollow container, and the adsorption / desorption gas flows through this part ,
The hollow container has a lid member that is removable with respect to the upper surface that is opened, and the lid member is provided with a heat transfer tube inlet and a heat transfer tube outlet,
The heat transfer tube extends into the hollow container through the heat transfer tube inlet of the lid member and out of the hollow container through the heat transfer tube outlet of the lid member;
A bowl-shaped container in which an ozone adsorbent is housed and an adsorption / desorption gas can flow is provided in the hollow container,
The upper part of the said bowl-shaped container is opened, The said heat exchanger tube is located in the inside of the said bowl-shaped container, The ozone adsorption tower characterized by the above-mentioned .

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