JPH0552689U - Ozone purification equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To efficiently liquefy and collect ozone in oxygen gas containing about 5% ozone generated from an ozonizer. [Structure] A pipe passing through the inside of the condenser is composed of a spiral pipe portion and a straight pipe portion, and a liquefied ozone storage portion is provided at the bottom, and the storage portion can be heated by a heater.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to an ozone purifier, and more particularly to the structure of its condenser.

[0002]

[Prior Art]

 Conventionally, as a method for producing ozone used for production of oxide superconductors, for example, literature: Review of scientific Instruments (Review of Scientific Instruments) Vol. 60 No. 12 1989 p. There is a method proposed in 3769-3770.

This method will be described with reference to FIG. Oxygen gas as a raw material is sent from an oxygen gas source 20 to an ozone generator (also referred to as an ozonizer) 22, where about 5% of the raw oxygen gas is converted to ozone by corona discharge. This gas is supplied to the condenser 12 through the control valve 16, and the surplus is decomposed into harmful oxygen in the decomposer 30 to be converted into oxygen and then released into the atmosphere.

The condenser 12 is covered with an inner cylinder 26 and an outer cylinder 24. The inner cylinder is filled with an inert gas 32, for example, helium (He) gas, and the outer cylinder is filled. It contains a refrigerant 28, for example liquid nitrogen. Therefore, the 5% ozone-containing oxygen gas entering the condenser 12 is cooled by the helium gas cooled by liquid nitrogen (temperature: -196 ° C). For this reason, ozone at a liquefaction temperature of −112 ° C. and oxygen at a liquefaction temperature of −183 ° C. are both liquefied and stored in the reservoir 34 at the bottom of the condenser 12.

Next, the helium gas 32 in the inner cylinder 26 is removed to make a vacuum (not shown), and then the inside of the condenser 12 is decompressed by the sorption pump 18. The vapor pressure of ozone at a temperature of liquid nitrogen of −196 ° C. is 3 mmTorr, and the vapor pressure of oxygen at that time is 150 Torr, so the vapor pressure of oxygen is extremely high. Therefore, oxygen is vaporized again and only liquid ozone 34 remains in the reservoir 34 at the bottom of the condenser 12.

[0006]

[Problems to be solved by the device]

 However, the condenser 12 in the above-mentioned conventional apparatus has a cylindrical shape, and therefore, there is a problem that the heat transfer area for cooling is not sufficient and therefore the liquefaction efficiency is not good.

An object of the present invention is to provide an ozone purifier having a structure in which a heat transfer area of a condenser is increased in order to efficiently liquefy an oxygen gas containing ozone gas introduced from an ozonizer in a condenser. It is in.

[0008]

[Means for Solving the Problems]

 In order to achieve this object, the present invention relates to an ozone purifying apparatus including a condenser for liquefying and separating ozone gas from a mixed gas of ozone and oxygen using a cooling medium, wherein the condenser is a container and an upper part of the container. A pipe for introducing a mixed gas into the condenser from a side surface is provided, and the pipe in the container is a spiral pipe portion extending in a depth direction inside the container, and a bottom portion inside the container. A straight pipe part having a closed bottom end rising vertically from the straight pipe part, and the straight pipe part and the spiral pipe part are connected to each other, leaving a liquefied ozone storage part at the lower end part of the straight pipe part. The pipe portion is provided so as to penetrate through the top of the condenser.

In implementing the present invention, it is preferable that a heater is provided around the outer periphery of the liquefied ozone storage portion at the lower end of the straight pipe so that this portion can be heated.

[0010]

[Action]

 According to the configuration of the present invention described above, the pipe constituting the pipe for introducing the raw material gas, that is, the mixed gas of ozone and oxygen into the condenser is mainly composed of the spiral pipe portion and the straight pipe portion. As a result, the heat transfer area for the refrigerant is increased, and therefore the cooling efficiency is improved.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram for explaining a condenser forming a main part of an ozone purifying apparatus of the present invention.

It should be noted that the drawings only schematically show the shapes, sizes, and positional relationships of the respective constituent components to the extent that the present invention can be understood.

Since the ozone purifying apparatus of this embodiment can have the same structure as the above-mentioned conventional apparatus except for the condenser, here, the condenser according to the present invention will be mainly described with reference to FIGS. 1 and 2. However, description of other components will be omitted.

The mixed gas generated in the ozonizer 22, for example, oxygen gas containing about 5% ozone (sometimes referred to as “produced gas”) passes through the control valve 16 and is installed in place of the conventional condenser. Based condenser 50 (FIG. 1).

The condenser 50 includes a container 52 containing an inert gas, and a condensing pipe 54 that is a pipe for introducing the mixed gas into the container 52 and for causing the gas to condense.

The condensing pipe 54 includes a spiral pipe portion 56 and a straight pipe portion 58. The spiral tube portion 56 is provided by penetrating the end portion on the gas inlet portion 60 side to the outside of the container 52 at the side surface of the upper portion of the container 52. The main body portion of the spiral tube portion 56 extends downward in the container 52 toward the bottom. The pipe diameter of the pipe portion 56, the diameter of the spiral loop, the number of stages of the loop, and the length of the pipe portion 56 in the extending direction can be arbitrarily determined according to the design.

The straight pipe portion 58 rises vertically from the bottom of the container 52, penetrates the top of the container 52, and projects outside the container. The protruding portion becomes the gas outlet 62.

On the other hand, the bottom portion side of the container 52 of the straight pipe portion 58 is closed to form a storage portion 64 having a sealing structure. In order to store the liquefied ozone in the storage portion 64, the spiral pipe portion 56 is configured to be connected to the straight pipe portion 58, leaving the storage portion 64. Reference numeral 66 is a heater provided on the outer periphery of the reservoir 64. In addition, an inert gas such as helium gas 68 as a refrigerant is filled in the container 52 in a freely exhaustable state.

According to such a structure, the produced gas enters from the gas inlet portion 60 and descends the spiral pipe cooled to the temperature of the liquid nitrogen, that is, -196 ° C. by the helium gas 68 cooled by the liquid nitrogen. As it goes, it liquefies and collects in the storage part 64 at the lower end of the straight pipe part 58.

Then, the introduction of the generated gas is stopped, the helium 68 in the container 52 is removed, and the inside of the container 52 is evacuated for the purpose of heating by heat insulation (a vacuum device not shown).

Next, the pressure inside the condensing pipe 54 is reduced by the sorption pump 18, and as described above, oxygen is released to the outside of the ozone gas supply system by utilizing the difference in vapor pressure between ozone and oxygen. .. After that, the storage section 64 is adiabatically heated by the heater 66 to vaporize the liquefied ozone, so that the liquefied ozone is taken out to the ozone gas supply system via the gas outlet section 62, and the ozone is sent to other required places according to the purpose of use. I care.

The above-described embodiments are merely described as preferred embodiments of the present invention. This invention can be modified or changed in various ways. For example, the straight pipe portion 58 may not have a structure that passes through the spiral pipe portion 56, but may have a structure that passes by the side of the spiral pipe portion 56.

[0023]

As is apparent from the above description, according to the ozone purifying apparatus of the present invention, since the product gas introduction pipe in the condenser is composed of the spiral pipe portion and the straight pipe portion, it is suitable for the refrigerant. The heat transfer area is increased compared to the conventional case where only a straight pipe is used, so that the liquefaction and collection effect of ozone in the product gas introduced from the ozonizer to the condenser is improved.

Further, since a heater is provided in the reservoir portion of the introduction pipe to enable heating and evaporation, the vaporization rate of liquefied ozone is increased, thereby improving productivity.

[Brief description of drawings]

FIG. 1 is an explanatory view of a condenser according to the present invention.

FIG. 2 is an explanatory diagram of a conventional ozone manufacturing apparatus.

[Explanation of symbols]

 10: Raw material gas supply part 12: Condenser 14: Cooling part 16: Control valve 18: Sorption pump 20: Oxygen gas source 22: Ozonizer 24: Container (outer cylinder) 26: Container (inner cylinder) 28: Refrigerant 30: Decomposing device 32: Inert gas 34: Liquid ozone 50: Condenser 52: Container (inner cylinder) 54: Condensing pipe 56: Spiral pipe part 58: Straight pipe part 60: Gas inlet part 62: Gas outlet part 64: Liquefaction Material storage unit 66: Heater 68: Inert gas layer

Claims (2)

[Scope of utility model registration request] 1. An ozone purifying apparatus comprising a condenser for liquefying and separating ozone gas from a mixed gas of ozone and oxygen using a refrigerant, wherein the condenser is a container and a mixed gas from the upper side surface of the container. A pipe to be introduced into the container, the pipe in the container, a spiral pipe portion extending in a depth direction inside the container,
A straight pipe part having a closed bottom end rising vertically from the inner bottom part of the container, and connecting the straight pipe part and the spiral pipe part leaving a liquefied ozone storage part at the lower end part of the straight pipe part. The ozone purifier is characterized in that the straight pipe portion is provided so as to penetrate through the top portion of the condenser. 2. The liquefied ozone storage part according to claim 1,
An ozone purifier characterized in that a heater is provided around its outer periphery.