JP2000159508A - Ozone generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ozone generator of which the cooling efficiency is improved. SOLUTION: This ozone generator has the cooling water inlet 21 and the cooling water outlet 22, is equipped with the cylindrical vessel 10 into which the cooling water flows and a pair of end plates 17, 17 that are arranged in the cylindrical vessel 10. The stainless steel tube group 11a comprising a plurality of stainless tube pipes 11 are arranged in the couple of the end plates 17, 17. Discharge tubes 12 are set each inside individual stainless tubes 11, respectively. The baffle plate 26 is set between the cooling water inlet 21 and the stainless steel pipe group 11a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ozone generator applied to, for example, a water purification system.

[0002]

2. Description of the Related Art When a river or lake is used as a water source, the odorous and harmful components cannot be removed by conventional water purification treatment due to deterioration of water quality. The system is drawing attention.

FIG. 12 shows an example of a system configuration of an advanced water purification system. In the coagulation sedimentation tank 2, components of the water to be treated 1 taken from rivers and lakes are coagulated and settled. Thereafter, the water to be treated 1 is further filtered in the sand filtration tank 3 and led to the ozone reaction tank 4. The ozone reactor 4 has an air diffuser 5 for injecting the ozone generated by the ozone generator 6 into the inside thereof. The ozone injected from the air diffuser 5 decomposes odor components and organic substances contained in the water to be treated in the ozone reaction tank 4 by its strong oxidizing action. Thereafter, the water to be treated 1 is sent to the biological activated carbon tank 7, and the decomposition products contained in the water to be treated 1 are removed in the biological activated carbon tank 7.

FIG. 13 schematically shows an ozone generator 6.
As shown in FIG. 13, the ozone generator 6 is connected to the cooling water inlet 2.
1 and a plurality of stainless steel tubes 11 (electrode tubes) arranged in the cylindrical container 10, and a discharge tube (not shown) is inserted into each of the stainless steel tubes 11. ing. Many stainless steel tubes 11
Is fixed by a pair of end plates in the cylindrical container 10.

In FIG. 13, a discharge is performed between the stainless steel tube 11 and the discharge tube, and a part of the raw material air becomes ozone. During this time, the cooling water that has entered the cylindrical container 10 from the cooling water inlet 21 is filled with a large number of regularly arranged stainless steel tubes 11.
The air in the stainless steel tube 11 is cooled while flowing between the stainless steel tube groups 11a, and the temperature of the air is raised.

[0006]

The temperature of the cooling water entering the cylindrical container 10 from the cooling water inlet 21 gradually rises while cooling the air generated by the discharge while flowing outside the stainless steel tube 11. . In order to seal both ends of the stainless steel tube 11 to the end plate, a certain distance is required between the inner surface of the cylindrical container 10 and the outermost stainless steel tube 11, and inevitably the inner surface of the cylindrical container 10 and the stainless steel tube group. 11a
And a gap is generated between them. Most of the cooling water that has entered the cylindrical container 10 at a high flow rate from the cooling water inlet 21 does not disperse in the longitudinal direction of the stainless steel tube 11 and enters the gap between the inner surface of the cylindrical container 10 and the stainless steel tube group 11 a or the cooling water inlet 21. It goes to the cooling water outlet 22 through the inside of the nearby stainless steel tube group 11a. For this reason, the stainless steel tube group 11a inside the stainless steel tube group 11a,
There is a possibility that the amount of cooling water passing through the inside of “a” decreases and the cooling efficiency decreases. When the cooling efficiency decreases, the stainless steel pipe 11
It is not possible to sufficiently remove the heat generated during the discharge between the discharge tube and the discharge tube, and the air temperature rises. Since the amount of ozone generated per unit electric power (ozone yield) used for discharging decreases as the air temperature increases, the ozone yield decreases as the cooling efficiency decreases and the air temperature increases.

The present invention has been made in view of the above circumstances, and has as its object to provide an ozone generator having a high ozone yield by improving cooling efficiency.

[0008]

SUMMARY OF THE INVENTION The present invention provides a cylindrical container having a cooling water inlet and a cooling water outlet, through which cooling water flows, a pair of end plates disposed in the cylindrical container, and a pair of end plates. An electrode tube group consisting of a number of electrode tubes, each of which extends in the axial direction of the cylindrical container therebetween, and a cladding tube is inserted therein, and a buffer plate is provided between the cooling water inlet and the electrode tube group An ozone generator, a cylindrical container having a cooling water inlet and a cooling water outlet, through which cooling water flows, a pair of end plates disposed in the cylindrical container, and a cylinder between the pair of end plates. While extending in the axial direction of the container, provided with an electrode tube group consisting of a number of electrode tubes in each of which a cladding tube is inserted,
An ozone generator characterized by providing a perforated plate extending between a pair of end plates between a cooling water inlet and an electrode tube group, a cylindrical container having a cooling water inlet and a cooling water outlet, into which cooling water flows. And, a pair of end plates arranged in the cylindrical container, while extending in the axial direction of the cylindrical container between the pair of end plates,
An electrode tube group consisting of a large number of electrode tubes in each of which a cladding tube is inserted, and a short path prevention plate extending radially inward from the inner surface of the cylindrical container is provided between the cylindrical container and the electrode tube group. An ozone generator, a cylindrical container having a cooling water inlet and a cooling water outlet, through which cooling water flows, a pair of end plates disposed in the cylindrical container, and a cylinder between the pair of end plates. An electrode tube group consisting of a large number of electrode tubes, each of which extends in the axial direction of the container and has a coating tube inserted therein, is provided between the pair of end plates between the cylindrical container and the electrode tube group. An ozone generator characterized by having provided a path prevention pipe, a cylindrical container having a cooling water inlet and a cooling water outlet, through which cooling water flows, a pair of end plates arranged in the cylindrical container, and a pair of While extending in the axial direction of the cylindrical container between the end plates, Inside an electrode tube bundle comprising a plurality of electrode tubes cladding is inserted in, in the electrode tube group,
The gap between each electrode tube changes from a wide gap to a narrow gap. The ozone generator has a feature that the wide gap is a cooling water inflow area, and has a cooling water inlet and a cooling water outlet. A cylindrical container into which cooling water flows, a pair of end plates disposed in the cylindrical container, and a pair of end plates extending in the axial direction of the cylindrical container, and a cladding tube is inserted into each of them. An ozone generator comprising: an electrode tube group including a large number of electrode tubes; and a partition plate extending between a pair of end plates and having one side edge in contact with the inner surface of the cylindrical container in the electrode tube group. .

According to the present invention, the cooling water flowing into the cylindrical container from the cooling water inlet can be sufficiently spread into the electrode tube group. The cooling water that has sufficiently cooled the electrode tube then flows out of the cooling water outlet.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1A, 1B and 2 are views showing a first embodiment of an ozone generator according to the present invention.
As shown in FIGS. 1A and 1B and FIG. 2, the ozone generator has a cooling water inlet 21 and a cooling water outlet 22, and is disposed in a cylindrical container 10 into which cooling water flows, and disposed in the cylindrical container 10. A pair of end plates 17, 17, and a number of stainless steel tubes (electrode tubes) 11 extending between the pair of end plates 17, 17 and fixed to the pair of end plates 17, 17.

A pair of end plates 17, 17 are disposed on both sides of the cylindrical container 10 in the axial direction, and a large number of stainless tubes 11 extend in the axial direction of the cylindrical container 10 and constitute a stainless tube group 11a. .

A discharge tube 12 is concentrically inserted into each stainless steel tube 11. The discharge tube 12 is shown in FIG.
As shown in FIG. 2B, a glass tube 13 and a stainless steel film 14 coated on the inner surface of the glass tube 13 constitute a discharge space between the stainless tube 11 and the discharge tube 12.

The cylindrical container 10 includes a side wall 6 and a pair of end plates 16 provided on both sides of the side wall 6, and the inside of the cylindrical container 10 is defined by a pair of end plates 17, 17. An inlet water chamber 18 and an outlet water chamber 19 are formed on both sides.

The raw material air inlet 15 is located on the inlet water chamber 18 side.
An ozonized air outlet 20 is provided on the outlet water chamber 19 side.
Is provided. Further, a connection plate 25 is connected to the stainless steel film 14 of each discharge tube 12 via a fuse 24, and the connection plate 25 is connected to the high-pressure glass 23.

As shown in FIGS. 1A and 1B and FIG. 2, a buffer plate 26 is provided between the cooling water inlet 21 and the electrode tube group 11a. It has a shape larger than the caliber. The buffer plate 26 is attached to the cylindrical container 10 via a support leg 27 at a predetermined interval from the cylindrical container 10.

Next, the operation of this embodiment having the above-described configuration will be described. First, the raw material air enters the inlet water chamber 18 composed of the end plate 16 and the end plate 17 via the raw material air inlet 15, and thereafter the raw material air flows in the discharge space between the stainless steel tube 11 and the discharge tube 12. At this time, a part of the raw material air is changed to ozone by discharge generated in a gap between the stainless steel film 14 serving as a high voltage electrode and the stainless steel tube 11 serving as a ground electrode, and ozonized air is formed. The ozonized air flows out of the ozonized air outlet 20 through the outlet water chamber 19 between the end plate 16 and the end plate 17. Heat generated in the stainless steel tube 11 due to the discharge is generated by the stainless steel tube 11.
It is removed by cooling water flowing outside. The cooling water enters the cylindrical container 10 through the cooling water inlet 21 and is
After cooling the air in the stainless steel tube 11 to raise the temperature, the air is discharged from the cooling water outlet 22 to the outside.

During this time, the cylindrical vessel 10 is
After hitting the buffer plate 26, the cooling water that has entered the inside of the cylindrical container 10 passes through the gap between the buffer plate 26 and the cylindrical container 10 and in the axial direction between the stainless steel tubes 10 in the stainless steel tube group 10a. Outflow in the circumferential direction. Thereby, the cooling water can be dispersed over the entire length in the cylindrical container 10, and the cooling efficiency in the cylindrical container 10 is improved. For this reason, the temperature of the air flowing through the stainless tube 11 becomes lower than before, and an ozone generator with a high ozone yield can be realized. In addition, the buffer plate 26 allows the cooling water inlet 2
The high-speed cooling water flowing in from 1 does not directly hit the stainless steel tube 11, so that the vibration of the stainless steel tube 11 can be prevented. Therefore, a highly reliable ozone generator can be realized.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment shown in FIGS. 3 and 4, a perforated plate 28 is provided instead of the buffer plate 26, and other configurations are substantially the same as those in the first embodiment shown in FIGS. It is. 3 and 4, the same parts as those in the first embodiment shown in FIGS. 1 and 2 will be described in a simplified manner for convenience.

As shown in FIG. 3 and FIG.
0, a perforated plate 28 is provided to cover the cooling water inlet 21;
The perforated plate 28 is attached via support legs 27 from the inner surface of the cylindrical container 10. As shown in FIG. 3, the perforated plate 28 has a rectangular plate shape, and both end portions thereof have a pair of end plates 1.
7, and a pair of side edges are connected to the inner surface of the cylindrical container 10 as shown in FIG. In this way, the perforated plate 28 is installed at a constant distance from the inner surface of the cylindrical container 10.

3 and 4, the cooling water inlet 21
The cooling water having flowed into the cylindrical container 10 through the pores (not shown) of the perforated plate 28 flows out uniformly in the longitudinal direction of the stainless steel tube 11. As a result, the cooling water is
The stainless steel pipes 11a can be uniformly dispersed over the entire length of the cylindrical container 10, and the cooling efficiency is improved. For this reason, the temperature of the air flowing through the stainless tube 11 becomes lower than before, and an ozone generator with a high ozone yield can be realized. In addition, since the perforated plate 28 is provided, the flow velocity when the high-speed cooling water flowing from the cooling water inlet 21 hits the stainless steel tube 11 can be reduced, so that a highly reliable ozone generator that does not generate vibration of the stainless steel tube 11. Can be realized.

Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIGS. In the third embodiment shown in FIGS. 5 and 6, an additional perforated plate 29 is provided so as to cover the cooling water outlet 22, and the others are substantially the same as the second embodiment shown in FIGS. Are identical.

As shown in FIGS. 5 and 6, an additional perforated plate 29 is attached to the inner surface of the cylindrical container 10 via support legs 29a. As shown in FIG.
Has a rectangular plate shape, both ends of which are connected to a pair of end plates 17 and a pair of side edges are formed in a cylindrical container 10 as shown in FIG.
Connected to the inner surface. As described above, the additional perforated plate 29 is installed at a constant distance from the inner surface of the cylindrical container 10.

5 and 6, the cooling water inlet 21
The cooling water having flowed into the cylindrical container 10 through the pores (not shown) of the perforated plate 28 flows out uniformly in the longitudinal direction of the stainless steel tube 11. The cooling water that has risen between the stainless tubes 11 in the stainless tube group 11a passes through the pores (not shown) of the additional perforated plate 29 and collects in the flow path 40 formed by the additional perforated plate 29 and the cylindrical container 10. Out of the cooling water outlet 22.

5 and 6, the perforated plate 28 and the additional perforated plate 29 are provided, so that the cooling flowing between the stainless tubes 11 in the stainless tube group 11a sandwiched between the perforated plate 28 and the additional perforated plate 29 is performed. Water to stainless steel tube 11
And can be orthogonal. Generally, the flow perpendicular to the stainless steel tube 11 gives higher heat transfer performance than the inclined flow to the stainless steel tube 11, so that the temperature of the air flowing through the stainless steel tube 11 becomes lower than before and the ozone yield is higher. An ozone generator can be realized.

Fourth Embodiment Next, a fourth embodiment of the present invention will be described with reference to FIG. The embodiment shown in FIG. 7 has a short path prevention plate 30 provided in a cylindrical container 10, and the other points are the same as those of the first embodiment shown in FIGS.

In FIG. 7, the first shown in FIG. 1 and FIG.
The same parts as those of the first embodiment will be described by simplifying the drawing for convenience.

As shown in FIG. 7, a plurality of short path preventing plates 30 are provided between the cylindrical container 10 and the stainless steel tube group 11a at predetermined intervals in the circumferential direction. Each short path prevention plate 30 is installed between the end plates 17 and extends radially inward.

In FIG. 7, the cooling water that has entered the cylindrical container 10 from the cooling water inlet 21 is dispersed in the longitudinal direction of the stainless steel pipe 11 and flows through the stainless steel pipe group 11 a composed of the stainless steel pipe 11. Stainless steel pipe 11
The temperature gradually rises by exchanging heat with the air inside, and the cooling water outlet 2
It flows out from 2. At this time, since the cooling water in the cylindrical container 10 is guided into the stainless steel tube group 11a, the amount of cooling water flowing between the stainless steel tubes 11 in the stainless steel tube group 11a increases, and the cooling efficiency is improved. For this reason, stainless steel pipe 1
The temperature of the air flowing through the inside 1 is lower than before, and an ozone generator having a high ozone yield can be realized.

By installing a plurality of short path prevention plates 30 on the inner surface of the cylindrical container 10, the stainless steel tube group 1
Since the cooling water once flowing out of the inside of the cylindrical vessel 10 from the inside of the cylindrical tube 10 can be returned to the inside of the stainless steel tube group 11a, the cooling efficiency can be further improved.

Fifth Embodiment Next, a fifth embodiment of the present invention will be described with reference to FIG. The embodiment shown in FIG. 8 is different from the embodiment shown in FIG. 7 in that a short path prevention pipe 31 is provided in the cylindrical container 10 instead of the short path prevention plate 30.

As shown in FIG. 8, a plurality of short path prevention pipes 31 are provided between the cylindrical vessel 10 and the stainless steel pipe group 11a.
Is attached. Both ends of the short path prevention tube 31 are supported by a pair of end plates 17.

In FIG. 8, the cooling water flowing in the gap between the cylindrical vessel 10 and the stainless steel pipe group 11a can be guided between the stainless steel pipes 11 in the stainless steel pipe group 11a by the short path prevention pipe 31.

With the above configuration, the short path of the cooling water can be reduced, so that an ozone generator having a high ozone yield can be realized.

Sixth Embodiment Next, a sixth embodiment of the present invention will be described with reference to FIG. In the embodiment shown in FIG. 9, the gap between the stainless tubes 11 in the stainless tube group 11a is changed from a wide gap to a narrow gap, and the wide gap is used as a cooling water inflow lane (cooling water inflow area) 32. .

In FIG. 9, the first type shown in FIGS.
The same parts as those of the first embodiment will be described by simplifying the drawing for convenience.

In FIG. 9, the cooling water that has entered the cylindrical vessel 10 from the cooling water inlet 21 is guided to the inside of the stainless steel tube group 11a along the cooling water inflow lane 32, and flows through the gap outside the stainless steel tube group 11a. As a result, the amount of cooling water to be short-passed can be reduced. Therefore, an ozone generator having a high ozone yield can be realized.

Seventh Embodiment Next, a seventh embodiment of the present invention will be described with reference to FIG. The embodiment shown in FIG.
The partition plate 33 and the short-path prevention plate 34 are provided in a.

In FIG. 10, the same parts as those in the first embodiment shown in FIGS. 1 and 2 will be described in a simplified manner for convenience.

The stainless steel tube group 11a composed of the stainless steel tubes 11 is divided into a plurality of tube groups 35a, 35 by a partition plate 33.
b, 35c, and both ends of the partition plate 33 are connected to a pair of end plates 17. Also, as shown in FIG.
Only one side edge of the partition plate 33 is connected to the inner surface of the cylindrical container 10. In the tube groups 35a and 35c on the cooling water inlet 21 side and the cooling water outlet 22 side, short path prevention plates 34 are installed in gaps between the tube groups 35a and 35c and the cylindrical container 10, respectively.

In FIG. 10, the cooling water that has entered the cylindrical container 10 from the cooling water inlet 21 is separated by the partition plate 33 and the cylindrical container 1.
After passing through the tube group 35a surrounded by 0, the gas enters the tube group 35b through the gap between the partition plate 33 and the cylindrical container 10. Tube group 3
The cooling water passing through 5b passes through the gap between the partition plate 33 and the cylindrical container 10 and enters the tube group 35c. The cooling water that has passed through the pipe group 35c surrounded by the partition plate 33 and the cylindrical container 10 reaches the cooling water outlet 22. Cooling water inlet 21 and cooling water outlet 22
In the tube groups 35a and 35c located on the side, the short path is prevented by the short path prevention plate 34.

According to the embodiment shown in FIG. 10, the stainless steel tube group 11a and the cylindrical vessel 10
Can be greatly reduced, and the cooling performance is improved by increasing the flow velocity of the cooling water when passing through the stainless steel tube group 11a. As a result, the ozone yield of the ozone generator can be further increased.

Eighth Embodiment Next, an eighth embodiment of the present invention will be described with reference to FIG.

In the embodiment shown in FIG. 11, a stainless tube group 11a composed of stainless tubes 11 is divided into a plurality of tube groups 35a, 35b, 35c by a partition plate 33, and both ends of the partition plate 33 are a pair. The other components are connected to the end plate 17, and the other components are substantially the same as those of the seventh embodiment shown in FIG.

As shown in FIG. 11, one end edge of the partition plate 33 is connected to the inner surface of the cylindrical container 10. In the tube groups 35a and 35c on the side of the cooling water inlet 21 and the side of the cooling water outlet 22, a partition 36 is provided between the tube groups 35a and 35c and the cylindrical container 10, respectively. The partition 36 has a square shape, and each side is connected to the pair of end plates 17 and the inner surface of the cylindrical container 10.

In FIG. 11, the cooling water entering the cylindrical container 10 from the cooling water inlet 21 passes through a pipe group 35 a surrounded by the partition plate 33 and the partition 36, and then a gap between the partition plate 33 and the cylindrical container 10 is formed. Through the pipe group 35b surrounded by the upper and lower partition plates 33. The cooling water that has passed through the tube group 35b enters the tube group 35c through a gap between the partition plate 33 and the cylindrical container 10. The cooling water that has passed through the pipe group 35 c surrounded by the partition plate 33 and the partition 36 reaches the cooling water outlet 22.

As described above, according to the present embodiment, the stainless steel tube group 11a and the cylindrical container 10
The problem of the short path caused by the gap between the pipes can be solved, and the cooling performance is improved by increasing the flow velocity of the cooling water when passing through the stainless steel tube group 11a.
For this reason, the ozone yield of the ozone generator can be further increased.

Although the first to eighth embodiments have been described as independent embodiments, these embodiments may be combined as desired to form an ozone generator.

[0049]

As described in detail above, according to the present invention,
By sufficiently spreading the cooling water into the electrode tube group, the electrode tubes can be sufficiently cooled. Thus, the cooling efficiency can be improved, and the ozone yield of the ozone generator can be increased.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a first embodiment of an ozone generator according to the present invention.

FIG. 2 is a cross-sectional view of the ozone generator shown in FIG.

FIG. 3 is a schematic sectional view showing a second embodiment of the ozone generator according to the present invention.

FIG. 4 is a cross-sectional view of the ozone generator shown in FIG.

FIG. 5 is a schematic sectional view showing a third embodiment of the ozone generator according to the present invention.

FIG. 6 is a cross-sectional view of the ozone generator shown in FIG.

FIG. 7 is a cross-sectional view showing a fourth embodiment of the ozone generator according to the present invention.

FIG. 8 is a cross-sectional view showing a fifth embodiment of the ozone generator according to the present invention.

FIG. 9 is a cross-sectional view showing a sixth embodiment of the ozone generator according to the present invention.

FIG. 10 is a cross-sectional view showing a seventh embodiment of the ozone generator according to the present invention.

FIG. 11 is a cross-sectional view showing an eighth embodiment of the ozone generator according to the present invention.

FIG. 12 is a system diagram showing an advanced water purification system.

FIG. 13 is a schematic sectional view of a conventional ozone generator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Cylindrical container 11 Stainless steel tube 11a Stainless steel tube group 17 End plate 21 Cooling water inlet 22 Cooling water outlet 26 Buffer plate 27 Support leg 28, 29 Perforated plate 30, 34 Short path prevention plate 31 Short path prevention tube 32 Cooling water inflow lane 33 Partition plate 35a, 35b, 35c Tube group 36 Partition wall

Claims (8)

[Claims] 1. A cylindrical container having a cooling water inlet and a cooling water outlet into which cooling water flows, a pair of end plates disposed in the cylindrical container, and an axial direction of the cylindrical container between the pair of end plates. Ozone generation characterized by comprising an electrode tube group consisting of a large number of electrode tubes each of which extends and in which a cladding tube is inserted, and a buffer plate is provided between the cooling water inlet and the electrode tube group. apparatus. 2. A cylindrical container having a cooling water inlet and a cooling water outlet into which cooling water flows, a pair of end plates disposed in the cylindrical container, and an axial direction of the cylindrical container between the pair of end plates. An electrode tube group consisting of a large number of electrode tubes, each of which extends and has a cladding tube inserted therein, is provided.A perforated plate extending between a pair of end plates is provided between the cooling water inlet and the electrode tube group. An ozone generator characterized by the above-mentioned. 3. The ozone generator according to claim 2, wherein the perforated plate has a pair of side edges abutting on the inner surface of the cylindrical container. 4. The ozone generator according to claim 3, wherein an additional perforated plate extending between the pair of end plates is provided between the cooling water outlet and the electrode tube group. 5. A cylindrical container having a cooling water inlet and a cooling water outlet, into which cooling water flows, a pair of end plates disposed in the cylindrical container, and an axial direction of the cylindrical container between the pair of end plates. An electrode tube group consisting of a large number of electrode tubes, each of which extends and has a cladding tube inserted therein, is provided between the cylindrical container and the electrode tube group to prevent a short path extending radially inward from the inner surface of the cylindrical container. An ozone generator comprising a plate. 6. A cylindrical container having a cooling water inlet and a cooling water outlet, through which cooling water flows, a pair of end plates disposed in the cylindrical container, and an axial direction of the cylindrical container between the pair of end plates. An electrode tube group consisting of a large number of electrode tubes each of which extends and has a cladding tube inserted therein, and a short path prevention tube extending between a pair of end plates is provided between the cylindrical container and the electrode tube group. Ozone generator characterized by the above-mentioned. 7. A cylindrical container having a cooling water inlet and a cooling water outlet into which cooling water flows, a pair of end plates disposed in the cylindrical container, and an axial direction of the cylindrical container between the pair of end plates. An electrode tube group consisting of a large number of electrode tubes, each of which extends and has a cladding tube inserted therein, has a gap between electrode tubes varying from a wide gap to a narrow gap in the electrode tube group. An ozone generator characterized in that a wide gap serves as a cooling water inflow area. 8. A cylindrical container having a cooling water inlet and a cooling water outlet, through which cooling water flows, a pair of end plates disposed in the cylindrical container, and an axial direction of the cylindrical container between the pair of end plates. An electrode tube group comprising a large number of electrode tubes, each of which extends and has a cladding tube inserted therein, and a partition extending between a pair of end plates in the electrode tube group and having one side edge in contact with the inner surface of the cylindrical container. An ozone generator comprising a plate.