JP2010228974A - Ozone generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ozone generator in which reduction in cooling efficiency is not caused. <P>SOLUTION: The ozone generator is provided with: ozone generation tubes 1; a cooling vessel 2 having an upper side opening 21 for extracting the air of a cooling liquid, storing the ozone generation tubes 1 in a state where both edges are projected, and cooling the ozone generation tubes 1 from the outside by cooling water A; a cooling part cooling the ozone generation tubes 1 from the inside by the cooling water A; and a chiller apparatus 31 as a cooling means 12 for circulating the cooling water A while temperature is controlled, and includes piping for circulation returning the cooling water A after the cooling of the inside of the ozone generation tubes 1 into the cooling vessel 2. The cooling vessel 2, at the inside thereof, includes partitions 4 such as dividing means performing division in such a manner that both the cooling water A-1 and A-2 are not mixed with each other, at the lower side cooling liquid storage part 22 storing the cooling water A-1 and the upper side cooling liquid storage part 23 storing the cooling water A-2. Each partition 4 has a communication opening 41 for extracting the air of the cooling water A-1 stored in the lower side cooling liquid storage part 22 through the upper side opening 21. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an ozone generator that can be preferably used in industrial fields that require ozone such as water and sewage treatment and pulp bleaching.

  As an industrial-scale ozone generator, an ozone generator that uses a silent discharge to ozonize a source gas containing oxygen is known, for example, from Patent Document 1. As shown in FIG. 1, for example, a conventional ozone generator has an ozone generating tube 1 having both ends of an ozone generating tube 1 provided with a gas inlet / outlet and an electrode terminal at an end portion thereof in a gas-tight manner. Cooling water A, which is a coolant, is circulated through a heat exchanger 8 through a cooling vessel 2 formed between a pair of side plates 1a and a pair of tube plates 3 parallel to the generator tube 1 and provided with a bottom plate 1b to generate ozone. A pair of gas chambers 5 are provided at both ends of the tube 1 and adjacent to the cooling vessel 2.

  Ozone has a characteristic that it is weak against heat and decomposes due to heat. Since the ozone generating tube generates heat by discharging, cooling water is passed through the ozone generating tube in order to suppress heat generation. Although the temperature of the cooling water is controlled to be constant by a temperature control device such as a chiller device, the temperature of the cooling water itself rises after the ozone generating tube is cooled. Since the water whose temperature rises expands and increases its volume, if the cooling water system is a closed system, piping and the like may be damaged due to the expansion of the cooling water.

  In addition, when the cooling water is cooled from high temperature to low temperature, the water contracts, the pressure of the cooling water piping system drops to negative pressure, and ambient air may permeate into the cooling water. If air enters the cooling water, the cooling effect is lowered, and the ozone generation performance is considered to be lowered. For this reason, a partially opened tank is installed in the cooling water system, or a cooling container of the ozone generator is partially opened.

  Cooling water is passed through either or both of the ozone generation pipe, but both the cooling water flow paths inside and outside the ozone generation pipe are separate inside the ozone generator main unit. When doing so, there were various problems.

  As shown in FIG. 3, when a partially opened tank 7 is installed in the system of cooling water A, compared to the cooling container 2 that cools the ozone generating pipe 1 from the outside, the inner space of the ozone generating pipe 1 Since a certain cooling section and the piping of the cooling water A are very narrow, the flow rate of the cooling water A is increased. For this reason, there is a problem that the air that has penetrated into the cooling water A cannot be completely removed by the open tank 7 and is circulated together with the cooling water A, thereby reducing the cooling efficiency.

  As shown in FIG. 2, the cooling container 2 of the ozone generator 10 is shared, the upper part 6 of the cooling container 2 of the ozone generator 10 is partially opened, and the function is equivalent to the tank 7 shown in FIG. When the function of extracting the air that has penetrated into the cooling water A is provided, the cooling water A after cooling the ozone generating pipe 1 from the inside is supplied into the cooling container 2 outside the ozone generating pipe 1. Since the temperature of the cooling water A after cooling the ozone generating tube 1 is rising, the cooling efficiency is gradually lowered. Reference numeral 12 denotes a chiller device which is a cooling means for performing temperature control. The cooling water A which is in contact with the outside of the ozone generating pipe 1 circulated by the pump 33 and rises from the predetermined temperature set by the chiller device is again returned to the predetermined temperature. It is a device that cools down.

JP-A-6-263409

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a cooling efficiency in an ozone generator that cools an ozone generating tube from outside and inside with a cooling liquid such as cooling water. It is an object of the present invention to provide an ozone generator that does not cause a decrease in the temperature.

According to the present invention, the following ozone generator is provided.
[1] An ozone generating tube and an upper opening for removing air of the circulating coolant that is opened upward and circulates, the ozone generating tube is accommodated in a state where both ends protrude, and the circulating coolant is A cooling vessel configured to cool the ozone generating tube from the outside, a cooling unit provided inside the ozone generating tube and configured to cool the ozone generating tube from the inside by circulating coolant, and cooling An ozone generator comprising a cooling means for circulating the liquid separately so as to pass through the cooling container and the cooling section while controlling the temperature of the liquid, the cooling after the cooling means has passed through the cooling section A cooling pipe that circulates the liquid back into the cooling container, in which the cooling container occupies the lower side and stores the cooling liquid that cools the outside of the ozone generation pipe Coolant yield A dividing means for dividing the cooling liquid so that the two cooling liquids do not mix with each other. The dividing means communicates the upper coolant accommodating portion and the lower coolant accommodating portion with a communication opening for removing air from the coolant accommodated in the lower coolant accommodating portion through the upper opening. It has an ozone generator.

[2] The ozone generator according to [1], wherein the dividing unit includes a plurality of alternating partition walls.

  According to the present invention, the cooling liquid that cools the ozone generation pipe from the outside and the cooling liquid that cools the ozone generation pipe from the inside are not mixed before cooling the ozone generation pipe to each other. There is no decline. That is, the cooling liquid from the cooling section whose temperature has risen by cooling the ozone generation pipe from the inside is not mixed with the cooling liquid that cools the ozone generation pipe from the outside by the dividing means. It does not decline.

  In addition, the ozone generating pipe is installed in the upper coolant containing part having a larger space volume than the cooling pipe provided inside the ozone generating pipe or the inner peripheral part that is the inner peripheral part of the ozone generating pipe and the circulating pipe. By returning the cooling liquid cooled from the inside, the cooling liquid flow is decelerated, air is relatively easily vented from the cooling liquid, and the cooling efficiency is not lowered.

It is a front sectional view of a general ozone generator. It is a conceptual diagram which shows one Embodiment of the conventional ozone generator. It is a conceptual diagram which shows other embodiment of the conventional ozone generator. It is a conceptual diagram which shows one Embodiment of the ozone generator of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
In the description, the same reference numerals are used for the same elements, and redundant descriptions are omitted.

FIG. 4 is a conceptual diagram showing an embodiment of the ozone generator of the present invention.
In the figure, the ozone generator is configured to include an ozone generator tube 1, a cooling container 2, a cooling unit (not shown) that is the inner periphery of the ozone generator tube 1, and a cooling means 12. ing.

  In the present embodiment, the cooling container 2 has an upper opening 21 for removing air from the cooling water A that is a cooling liquid that is opened and circulated toward the upper side. Moreover, the cooling container 2 accommodates the ozone generation tube 1 in a state where both ends protrude, and is configured to cool the ozone generation tube 1 from the outside by circulating cooling water A. That is, the cooling container 2 accommodates a plurality of ozone generation tubes 1 in a state of being laid down in parallel and spaced apart from each other, and the cooling water A that is supplied and circulated therein is each outer peripheral portion of each ozone generation tube 1. It is possible to cool the ozone generating tube 1 from the outside by contacting it. Specifically, the cooling container 2 has a pair of spaces that define a space to which the cooling liquid is supplied and a space to which the cooling liquid is not supplied. Both ends are fixed and supported in an airtight manner.

  The cooling part is an inner peripheral part provided on the inner side of the ozone generating pipe 1 and enables the ozone generating pipe 1 to be cooled from the inner side by circulating cooling water A. Therefore, the cooling unit may have a structure that fulfills such a role, but the cooling unit in the present invention penetrates the inside of the ozone generating tube 1 instead of the inner peripheral portion of the ozone generating tube 1. It is possible to use a cooling pipe or other cooling unit disposed in the box.

  Further, the cooling means 12 circulates the cooling water A separately while passing through the cooling container 2 and the cooling part while controlling the temperature. Specifically, the cooling means 12 is divided so that the chiller device 31 that controls the temperature of the cooling water A and the cooling water A that is temperature-controlled by the chiller device 31 pass through the cooling container 2 and the cooling unit, respectively. A circulation pipe 32 for circulation and a pump 33 for circulating the cooling water A through the chiller device 31 and the circulation pipe 32 are provided. The circulation pipe 32 is configured to include a circulation pipe 32 a for returning the cooling water A after passing through the cooling unit into the cooling container 2.

  By the way, the cooling container 2 in the present embodiment includes a lower cooling liquid storage portion 22 in which the cooling water A-1 that occupies the lower side and cools the outside of the ozone generating tube 1 is stored, and an upper side. The cooling water A-1 and A-2 are mixed with each other in the upper cooling liquid storage part 23 that stores the cooling water A-2 that is returned to the cooling container 2 from the inside of the ozone generation pipe 1 It has the partition 4 which is a parting means for parting so as not to cut.

  The partition 4 communicates the upper coolant accommodating part 22 and the lower coolant accommodating part 23 with the air of the cooling water A-1 accommodated in the lower coolant accommodating part 22 through the upper opening 21. A communication opening 41 is provided for extraction. Specifically, the partition walls 4 are composed of a plurality of staggered partition walls that extend in a cantilever shape from one tube sheet toward the opposite tube sheet.

  In such an ozone generator 10, the cooling water A adjusted and controlled to a predetermined temperature by the chiller device 31 includes a line X that passes through the cooling container 2 in order to cool the ozone generator pipe 1 from the outside, and the ozone generator pipe. In order to cool 1 from the inside, it circulates by dividing into the line Y which passes through the inside of the cooling part which is the inner peripheral part of the ozone generation pipe 1.

  And the cooling water A-1 which circulates in the cooling vessel 2 gradually rises from the lower part in the lower side cooling liquid storage part 22 which occupies the lower side in the cooling vessel 2, and the outer periphery of the ozone generating tube 1 It contacts the part and cools it from the outside. On the other hand, the cooling water A-2 that circulates in the cooling part that is the inner peripheral part of the ozone generating pipe 1 comes into contact with the inner peripheral part of the ozone generating pipe 1 and cools it from the inside. It is circulated through the cooling container 2 through 32a, that is, into the upper cooling liquid container 23 that occupies the upper side of the cooling container 2.

  Since the cooling water A-1 that cools the ozone generation tube 1 from the outside is divided by the partition wall 4 at the upper end of the lower coolant accommodating portion 22 that occupies the lower side in the cooling vessel 2, the ozone generation tube 1 As a result of cooling from the inside, most of the cooling water A-2 circulating in the upper coolant accommodating portion 23 in a state where the temperature has risen is not mixed with each other, so the ozone generating tube 1 is cooled from the outside. Therefore, the temperature of the cooling water A-1 is not increased, and the cooling efficiency due to the cooling water A-1 does not decrease.

  In addition, since the partition wall 4 has the communication opening 41, the air mixed in the cooling water A-1 can be extracted through the communication opening 41. Moreover, since the cooling water A-2 circulating to the upper coolant accommodating part 23 is sufficiently decelerated in the upper coolant accommodating part 23, the air vent (deaeration) mixed in the coolant A-2 is removed. Will be made. Thereafter, the cooling water A (both cooling waters A-1 and A-2) is returned to the chiller device 31 from the upper part of the cooling vessel 2 via the line Z by the pump 33.

  As described above, it is required that the partition wall 4 have the communication opening 41 because the lower coolant accommodating portion 22 and the upper coolant are maintained while maintaining the function of removing the air from the coolant A in the cooling vessel 2. This is because an ozone generator excellent in energy efficiency that does not cause a decrease in cooling efficiency is exhibited by exerting a dividing function between the accommodating portions 23.

  Therefore, if it plays such a role, in the present invention, instead of the partition wall 4 composed of a plurality of staggered partition walls, one partition wall provided with a plurality of small holes as communication openings or other A partition may be used.

  The ozone generator of the present invention can be particularly preferably used in industrial fields that require ozone such as water and sewage treatment and pulp bleaching.

1: Ozone generating tube 1a: A pair of side plates 1b: Bottom plate 2: Cooling vessel 3: A pair of tube plates 4: Partition wall 5: A pair of gas chambers 6: Upper opening of cooling vessel 7: Open tank 8: Heat exchanger 10: Ozone generator 12: Cooling means 22: Lower coolant container 23: Upper coolant container 31: Chiller device 32: Pipe for circulation 32a: Pipe for circulation 33: Pump 41: Communication opening A, A-1 , A-2: Coolant (cooling water)
X, Y, Z: Line

Claims (2)

An ozone generator tube,
It has an upper opening for removing the air of the circulating coolant that is opened upward and circulates, accommodates the ozone generating tube in a state where both ends protrude, and cools the ozone generating tube from the outside by the circulating coolant. A cooling vessel configured to:
A cooling unit provided inside the ozone generating tube and configured to cool the ozone generating tube from the inside by circulating coolant;
An ozone generator comprising cooling means for circulating the coolant separately while passing through the cooling vessel and the cooling unit while controlling the temperature of the coolant;
The cooling means has a circulation pipe for circulating the coolant after passing through the cooling section;
The cooling container occupies the lower side in the inside thereof, and stores a cooling liquid containing the cooling liquid that cools the outside of the ozone generating pipe, and occupies the upper side from the inside of the ozone generating pipe. The upper cooling liquid storage portion that stores the cooling liquid returned into the cooling container has a dividing means for dividing so that both cooling liquids do not mix with each other,
This dividing means has a communication opening for communicating the upper cooling liquid storage section and the lower cooling liquid storage section through which the cooling liquid stored in the lower cooling liquid storage section is discharged through the upper opening. , Ozone generator.   The ozone generator according to claim 1, wherein the dividing means is composed of a plurality of staggered partitions.

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