JPS6330305A - Cooling device for ozone generator - Google Patents

Abstract

PURPOSE:To reduce operating cost by constituting the system so as to be able to cool an ozone generator by the cooling water used for a cooling device, when the temp. of the cooling water is low, thereby, eliminating the necessity of continuous regular driving of the cooling device. CONSTITUTION:A raw gas 11 is introduced to the ozone generator 2 and the oxygen in the raw gas 11 is ozonized by a silent electrical discharge. The heat generated thereby is cooled by coolants circulated through a pump 4, an evaportor 5, a compressor 6, a condenser 7, an expansion valve 8, and a cooling water pump 9, etc. In this case, the temp. of the cooling water for cooling the condenser 7 is detected by a cooling water temp. detector 16, and, when the detected temp. is below a set temp., the operation of the compressor 6 is stopped and a change-over valve 15 is switched to supply the cooling water to an auxiliary cooling water circuit C4. And the heat generated at the ozone generator 2 is cooled in a heat exchanger 14 by the heat-exchange between the coolant circulating in circuit C1 and the cooling water circulating in circuit C4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a cooling device for an ozone generator that generates ozone by a silent discharge method by applying a high voltage.

[Prior art] Figure 2 is shown in the catalog [Mitsubishi Electric Corporation SE-H24].
8-C] is a system configuration diagram showing a conventional cooling device for an ozone generator. In this FIG. 2, 1 is a raw material gas drying equipment.

2 is an ozone generator, 3 is a power supply equipment for applying high voltage to the ozone generator 2, 4 is a pump, and 5 is an evaporator as a heat exchanger, and these ozone generator 2, pump 4, and evaporator 5 are connected in an annular manner to form a cooling medium circulation circuit C.
1.

Further, 6 is a compressor, 7 is a condenser as a heat exchanger, and 8 is an expansion valve. Condenser 7° Expansion valve 8. The evaporators 5 are connected in an annular manner to form a refrigeration system C2.

Furthermore, 9 is a cooling water pump, 1o is a cooling tower, and these condensers 7. The cooling water pump 9° and the cooling tower 10 are connected in a ring to form a cooling water circuit C3.

Note that 11 is a raw material gas supply line, 12 is an ozonized gas supply line, and 13 is a makeup water supply line for replenishing water to the cooling tower 10.

Next, the operation will be explained. The raw material gas supplied through the raw material gas supply line 11 is dried by the gas drying equipment 1 to a sufficiently low dew point at which ozone generation can be performed stably and efficiently, and then reaches the ozone generator 2. Here, due to the high voltage supplied from the power supply equipment 3, oxygen in the raw material gas is ozonized by silent discharge in the ozone generator 2, and is taken out of the system as an ozonized gas through the ozonized gas supply line 12. When generating ozone, more than 90% of the input power is generated as heat loss, so removing this generated heat and maintaining the ozone generator 2 at a low temperature is an effective way to increase ozone generation efficiency. known to be necessary. However, the generated heat is removed by the cooling medium supplied to the ozone generator 2 by the pump 4, and the high-temperature cooling medium is absorbed by the evaporator 5, cooled, and reaches the ozone generator 2 again.

On the other hand, in the evaporator 5, the heat of the cooling medium is transferred to the compressor 6. Condenser7. Expansion valve8. Heat is transferred to the refrigerant circulating within the refrigeration system C2 configured by the evaporator 5. The refrigerant that has passed through the evaporator 5 is sucked into the compressor 6, becomes high temperature and high pressure, and is transferred to the condenser 7.
to go into. Here, the cooling water cooled by the cooling tower 10 is supplied by the cooling water/pump 9 to the condenser 7, where the high-temperature, high-pressure refrigerant and the cooling water exchange heat, and the refrigerant is cooled, condensed, and liquefied, and then sent to the expansion valve 8. enter. The refrigerant is depressurized by the expansion valve 8, becomes low temperature and low pressure, enters the evaporator 5 again, and repeats this cycle.

[Problems to be Solved by the Invention] However, since the conventional cooling device for an ozone generator is configured as described above, for example, even when the temperature of the cooling water cooled by the cooling tower is sufficiently low,
The compressor that makes up the refrigeration system must be kept running at all times, which requires electricity.

There were problems such as wasteful consumption.

This invention was made to solve the above-mentioned problems, and provides a cooling device for an ozone generator that can cool the ozone generator without driving the refrigeration device when the temperature of the cooling water is low. The purpose is to obtain.

[Means for solving problems] A cooling device for an ozone generator according to the present invention is a cooling device for an ozone generator.

In an ozone generator cooling device for cooling an ozone generator that generates ozone by a silent power source by applying a high voltage and being wetted, a cooling medium is circulated between the ozone generator and the heat exchanger. A cooling medium circulation circuit, a refrigeration system for absorbing the heat of the cooling medium by the heat exchanger, and a cooling water circuit for removing the condensation heat of the refrigeration system by heat exchange. In order to use the cooling water for cooling the cooling medium circulation circuit, an auxiliary cooling water circuit is provided which branches off from the cooling water circuit via a switching valve and connects the cooling water circuit and the cooling medium circulation circuit. , a cooling water temperature detector that detects the temperature of the cooling water, and a cooling water temperature detector that receives a detection signal from the cooling/water temperature detector and sends the cooling water to the auxiliary cooling water circuit when the temperature of the cooling water is below a predetermined value. A controller is provided for switching the switching valve to supply the refrigeration system and stopping the operation of the refrigeration system.

[Function] In the cooling device for an ozone generator according to the present invention, when the cooling water temperature becomes lower than the set temperature, the switching valve is switched and the cooling water is supplied to the auxiliary cooling water circuit side by a command from the controller. do. This cooling water is thereby used for cooling the cooling medium circulation circuit. At this time, the operation of the refrigeration system is stopped by a command from the controller.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1st
FIG. 1 is a system configuration diagram showing a cooling device for an ozone generator as an embodiment of the present invention. In FIG. 1, 1 is a raw material gas drying equipment, 2 is an ozone generator, and 3
is power supply equipment for applying high voltage to the ozone generator 2,
4 is a pump, and 5 is an evaporator as a heat exchanger. These ozone generator 2, pump 4, and evaporator 5 are each connected in a ring to form a coolant circulation circuit C1.

Further, 6 is a compressor, 7 is a condenser as a heat exchanger, and 8 is an expansion valve. The evaporators 5 are connected in an annular manner to form a refrigeration system @C2.

Furthermore, 9 is a cooling water pump, 10 is a cooling tower, and these condensers 7. The cooling water pump 9° and the cooling tower 10 are connected in a ring to form a cooling water circuit C3.

Note that 11 is a raw material gas supply line, 12 is an ozonized gas supply line, and 13 is a makeup water supply line for replenishing water to the cooling tower 10.

Further, 14 is another heat exchanger provided in the coolant circulation circuit C1, and 15 is a heat exchanger 14 whose cooling water flow path is connected to the condenser 8 side constituting the refrigeration system C2 or through the auxiliary cooling water circuit C4.
A switching valve 16 for switching to the side is a cooling water temperature detector provided in the cooling water circuit C3 to detect the cooling water temperature. Reference numeral 17 denotes a controller, which receives a detection signal from the cooling water temperature detector 16 and switches the switching valve 15 to supply cooling water to the auxiliary cooling water circuit C4 when the cooling water temperature is below a predetermined value. At the same time, the operation of the compressor 6 constituting the refrigeration system C2 is stopped.

Next, the operation will be explained. In FIG. 1, symbols 1 to
Since the equipment indicated by 13 has exactly the same functions as the conventional equipment, its operation is as described above, and therefore a description of its operation will be omitted.

Now, during normal times when the cooling water temperature is higher than a predetermined value, cooling tower 10. Cooling water pump9. The switching valve 15 is switched so that the condenser 8 is connected in an annular manner. Therefore, in this case, the operation is similar to the conventional one shown in FIG.

Next, when the cooling water temperature detector 16 detects that the cooling water temperature has become lower than the set temperature, the switching valve 15 is activated by a control signal from the controller 17, and the cooling water is transferred to the auxiliary cooling water circuit C4 side. will be supplied to That is, cooling tower 10. Cooling water pump9. Switching valve 15. Heat exchanger 14
The switching valve 15 is switched so as to configure a flow path that circulates through a circuit configured in an annular shape. At this time, ozone generator 2
The heat generated is removed by heat exchange between the cooling medium and the cooling water in the heat exchanger 14. The coolant thus cooled reaches the ozone generator 2 again.

On the other hand, the compressor 6 constituting the refrigeration system C2 receives a control signal from the controller 17 and is stopped at the same time as the switching valve 15 is activated.

In the above embodiment, the cooling water circuit C3 is provided with the cooling tower 10, but instead of the cooling tower, it may be configured to directly supply cooling water from an external system, and in this case, the above-mentioned The same effects as in the embodiment are achieved.

In addition, when using the same type of water as the cooling water as the cooling medium, a switching valve is provided in place of the heat exchanger 14, and cooling water is supplied directly into the cooling medium circulation circuit C1 when the cooling water temperature is below a predetermined value. You may also do so.

[Effects of the Invention] As described above, according to the present invention, when the cooling water temperature is low, the ozone generator is cooled by the cooling water in the cooling water circuit, so there is no need to constantly drive the refrigeration system. This allows for low energy consumption costs.
It has excellent effects, such as making it possible to use

[Brief explanation of the drawing]

FIG. 1 is a system configuration diagram showing a cooling device for an ozone generator as an embodiment of the present invention, and FIG. 2 is a system configuration diagram showing a conventional cooling device for an ozone generator. In the figure, 2 - ozone generator, 3 - power supply equipment, 4 - pump, 5 - evaporator as heat exchanger, 6 - compressor, 7 -
Condenser, 8-Expansion valve, 9-Cooling water pump, 10-Cooling tower, 14-Heat exchanger, 15-Switching valve, 16-Cooling water temperature detector, 17-Controller, C1-Cooling medium circulation circuit, C2- Refrigeration system, C3-cooling water circuit, C4-auxiliary cooling water circuit. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (2)

[Claims] (1) In an ozone generator cooling device for cooling an ozone generator that generates ozone by silent discharge when a high voltage is applied, a cooling medium is circulated between the ozone generator and the heat exchanger. A cooling water circuit for removing the condensation heat of the cooling system by heat exchange, a cooling system for absorbing the heat of the cooling medium by the heat exchanger, and a cooling water circuit for removing the condensation heat of the cooling system by heat exchange. In order to use the cooling water inside for cooling the cooling medium circulation circuit, an auxiliary cooling water circuit is provided which branches from the cooling water circuit via a switching valve and interconnects the cooling water circuit and the cooling medium circulation circuit. and a cooling water temperature detector that detects the temperature of the cooling water, and a cooling water temperature detector that receives a detection signal from the cooling water temperature detector and supplies the cooling water to the auxiliary cooling water circuit when the temperature of the cooling water is below a predetermined value. A cooling device for an ozone generator, characterized in that a controller is provided for switching the switching valve to supply water to the ozone generator and stopping the operation of the refrigeration device. (2) Another heat exchanger is interposed in the cooling medium circulation circuit, and the auxiliary cooling water circuit cools the cooling medium so that the heat of the cooling medium is absorbed by the other heat exchanger via the cooling water. 2. The cooling device for an ozone generator according to claim 1, wherein the cooling device is branched from the water circuit via the switching valve and connected to the other heat exchanger.