JPS58204803A - Intermittent ozone feeding apparatus - Google Patents

Abstract

PURPOSE:To eliminate the need for an expensive high lift pump, by desorbing ozone from an ozone adsorption and desorption column under reduced pressure in an intermittent ozone feed apparatus, and using a pressurizing blower for the desorbed ozone and a water supply pump for a pressurizing tank. CONSTITUTION:In an intermittent ozone feed apparatus having an ozonizer 1, ozone adsorption and desorption column 2, pressurizing tank 13 for ozone, etc., the adsorbed ozone in the ozone adsorption and desorption column 2 is desorbed from an ozone adsorbent by brine from a brine tank 6, and then compressed and stored in the pressurizing tank 13 by a pressurizing blower 12. In feeding the ozone to a high-pressure water supply pipe 11, a valve (5e) is closed to open valves (5f) and (5g), and a water supply pump 14 is operated to supply water into the pressurizing tank 13. The oxygen gas containing the ozne is then passed through the valve (5g) and injected into the water supply pipe 11. Thus, a high lift pump such as an ejector pump is not required.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an intermittent ozone supply device, and particularly to an intermittent ozone supply device that injects ozone into a high-pressure water pipe.

Large amounts of cooling water are used in power plants, chemical industries, etc., but microorganisms and algae in the water cause slime problems, clogging pipes and reducing heat exchange efficiency. As a preventive measure against these problems, the application of highly concentrated ozonated water is being considered. In order to generate this highly concentrated ozonated water, it is necessary to use a smaller and smaller capacity ozone generator to accumulate the generated ozone in the adsorbent for a longer period of time than to generate it using an ozone generator with Otani value. However, a so-called intermittent ozone supply device that extracts this accumulated ozone from the adsorbent at once to produce highly concentrated ozone water is advantageous in terms of equipment costs and operating costs.

An example of a typical conventional intermittent ozone supply device will be explained with reference to FIG. Figure 1 (,) is a flow diagram showing a conventional intermittent ozone supply device, Figure 1 (b) is a vertical sectional view showing the adsorption and desorption groups of Vi, and Figure 1 (C) is a vertical sectional view showing the U ozone generator. In the figure, (1) is an ozone generator,
(2) Ozone and adsorption/desorption groups that adsorb and accumulate ozone generated in this ozone generator; (3) a circulation blower that circulates oxygen gas from this ozone adsorption/desorption tower to the ozone generator (1); 4) is an oxygen supply source that supplies oxygen to the ozone generator (1), (5a) to (5c) are solenoid valves, (6) is a brine tank for heating the ozone adsorption/desorption tower (2), and (7) is an oxygen supply source that supplies oxygen to the ozone generator (1). A brine pump that supplies prine to the brine tank Karasushin adsorption and desorption tower (2), (8) a refrigerator for cooling the haozone adsorption and desorption tower (2), and (9) a refrigerator that supplies ozone from the ozone adsorption and desorption tower (2). This is an ejector pump that supplies treated water to the suction ejector, Qlfl.

The ozone adsorption/desorption tower (2) has a double cylinder structure as shown in Figure 1 (b), the inner cylinder (2a) is filled with ozone adsorbent (2b), and the inner cylinder (2a) and outer cylinder A prine jacket (2d) is formed between (2c) and filled with prine, which is then passed through the brine coil (2c) to the brine tank (6).
is in contact with. (2f) is an evaporation tube wound around the cylinder (2a), which is connected to the refrigerator (8). Ozone adsorbent (
For 2b), silica gel is generally used, and ethylene glycol, alcohols, etc. are used as the brine.

As shown in FIG. 1(c), the ozone generator (1) is constructed so that silent discharge occurs in the gap formed by the high voltage electrode stack (la) and the ground electrode tube (1b). (1c) is a high voltage bushing, (ld) is a high voltage fuse, and (1e) is an insulating block.

The circulation blower (3), the ozone generator (1), and the ozone adsorption/desorption tower (2) constitute one circulation system in this order.

Next, the operation will be explained. This operation mainly includes two operations: an ozone adsorption operation and an ozone desorption operation.

First, the suction operation will be explained. Oxygen is constantly supplied into the circulation system from an oxygen supply source (4) at a constant pressure. The pressure at this time is usually 1. Maintained by Okpr/cjo.

Solenoid valves (5a) and (5b) are open, and (5c) is closed. When oxygen is passed through the circulation system through the circulation blower (3), part of the oxygen is converted into ozone by silent discharge while passing through the discharge gap of the ozone generator (1), and ozonized oxygen is generated. becomes. This ozonized oxygen is transported to the ozone adsorption/desorption tower (2). The ozone adsorbent (2b) in the ozone adsorption/desorption tower (2) selectively adsorbs ozone, and the remaining oxygen passes through the solenoid valve (51) and is sent to the ozone generator (1) by the circulation blower (3). It will be sent back.

Oxygen consumed as ozone is replenished as appropriate from the oxygen supply source (4). At this time, the temperature of the ozone adsorbent ('!b) is cooled to -30 DEG C. or lower by the refrigerator (8). This is because the amount of ozone adsorbed by the ozone adsorbent (2b) changes greatly depending on the temperature. That is, when the temperature is lowered, the amount of ozone adsorbed increases, and conversely, when the temperature is raised, the amount of ozone adsorbed is decreased. Therefore, when desorbing ozone, the temperature of the ozone adsorbent (2b) is increased.

When the ozone adsorbent (2b) of the ozone adsorption/desorption tower (2) adsorbs ozone close to the saturated adsorption amount, it shifts to desorption operation. In the desorption operation, the ozone generator (1), circulation blower (3), and refrigerator (8) stops operating, and the solenoid valves (5a) and (5b
) closes and the solenoid valve (5C) opens. At this time, brine is supplied from the brine tank (6) by the brine pump (7) so that the ozone adsorbed on the ozone adsorbent (2b) can be easily desorbed, and heat is applied to the ozone adsorbent (2b). Raise the temperature. In this state, operate the ejector pump α and raise the ejector (
9) sucks ozone in the ozone adsorption/desorption tower (2) under reduced pressure, disperses and dissolves it in water in the ejector (9), and sends it to the point of use as ozone water. At this time, the internal pressure reached within the ozone adsorption/desorption tower (2) by vacuum suction is approximately -60 to -7051 Hg. When the desorption period ends in this manner, the adsorption operation is resumed and the operation is repeated continuously. FIG. 2 shows an operation sequence diagram of the conventional device.

By the way, in depressurizing ozone desorption using such an ejector injection method, if the ejector (9) outlet is connected to a high-pressure water pipe, the capacity of the ejector pump (11) becomes considerably large, and the pump capacity is increased, resulting in high head and large flow rate. A large pump is required.In other words, after preheating is performed by the desorption operation, when the ejector (9) is used to inject the treated water under reduced pressure, if the internal pressure of the water pipe for the treated water is high, the KFi and ejector pump 4 will have extremely high head specifications. Therefore, the lamp motor is larger than the entire device, and it also has an effect on the power receiving equipment itself.

For example, when the water pipe internal pressure is 4.5 kff/JG, the outlet pressure of the ejector pump Ql is l 51wf/jG (1
50mA)) is also required, and the electric motor corresponding to this will vary depending on the amount of water, but will be a very large one of 75 to 160KW. However, as shown in Figure 2, since the ejector pump (11) operates only during part of the loading/unloading time and the short filling time, running costs are low, but the initial cost and power receiving capacity are large, and voltage fluctuations to the main power source are caused. This method also has the disadvantage of causing large transient current changes.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and includes a pressure blower and a pressurizer that depressurize and desorb ozone from an ozone adsorption/desorption unit, and forcefully send the desorbed ozone to a pressurized tank. It is an object of the present invention to provide an intermittent ozone supply device that can inject ozone-containing oxygen into a high-pressure water pipe with a small water pump by providing a water pump that sends water to a pressure tank, and that can reduce the size of the device and power receiving equipment. The purpose is

An embodiment of the present invention will be described below with reference to the drawings. Third
The figure is a flowchart showing an embodiment of the present invention, and in the figure, (1) to Ql are the same as those in FIG. ■ is a high-pressure water pipe, r14 is a pressure blower that depressurizes and desorbs ozone from the ozone adsorption/desorption tower (2) together with a circulation blower (3), and pressure-feeds the desorbed ozone-containing r11 element to pressurized tank 0; a4 is a pressure-feeding A water pump that sends part of the water in the water pipe αυ to the pressure tank 0, (5d) is a solenoid valve installed between the circulation blower (3) and the pressure blower α4, and (5C) is the pressure blower u4. The operation of the solenoid valve (5f) installed between the pressurized tank A and the pressurized tank 0 (5g) will be explained next. The suction operation is performed in the same manner as in FIG. The attachment/detachment operation is performed as follows. First, when adsorption is completed, the solenoid valves (5m) and (5b) are closed, and the circulation blower (3m) is closed.
), the ozone generator (11) and the refrigerator (8) stop operating.Then, the brine in the brine tank (6) is sent to the ozone adsorption/desorption tower (2) by the brine pump (7), where it is preheated. It begins.

When the temperature k of the ozone adsorbent (2b) in the ozone adsorption/desorption tower (2) reaches approximately 0 to 5°C, the preheating is almost completed.

Next, the ozone in the ozone adsorption/desorption tower (2) is depressurized, desorbed, and sent to the pressurized tank (131).At this time, pressurized tank a3 performs the following operations during ozone adsorption to prepare for ozone accumulation. It is assumed that the solenoid valve (
5c), (5f), (5g) are closed, TA valve (5h),
(51) opens, and the pressure water stored in the pressurized tank 0 is released to the outside of the system, and after the release, all of the solenoid valves (5c) to (5I) are closed. And after preheating, 11! Magnetic valve (5d),
(5e) opens, and the ozone in the ozone adsorption/desorption tower (2) is depressurized and desorbed by the circulation blower (3) and pressurized blower ring, and the desorbed ozone is forced into the pressurized mentor 0 and stored. Ru. When the internal pressure of the ozone adsorption/desorption tower (2) reaches the target pressure, ozone removal is completed.

When the attachment and detachment are completed, the solenoid valves (5d) and (5e) close,
Pressure blower u4 stops. At the same time, a solenoid valve (5a),
(5b) opens and is filled with oxygen, generating ozone a (1
), refrigerator (8), and circulation blower (3) are operated and ozone adsorption begins again. - When the solenoid valves (5f) and (5g) open, the water pressure in the pressurized tank 3 and the ozonized oxygen pressure are balanced. Generally, the water pressure is high, so the ozonated oxygen is compressed.After the ozonated oxygen is compressed, when the water pump I operates, water is sent from below the pressurized tank, and the ozone-containing oxygen in the pressurized tank 0 is The gas is in a pressurized tank (13
It is injected from the top through a solenoid valve (5g) into the high-pressure water pipe aυ.

In addition, in the above embodiment, an example was shown in which pressure blowers U were provided in addition to the circulation blower (3), but the circulation blower (3) was used to reduce the pressure in the ozone adsorption/desorption tower (2) and to reduce the pressure in the pressurization tank (13). If both pressurization is possible, the pressure blower Q4 may be omitted.

As described above, according to the present invention, the ozone adsorption/desorption tower desorbs dioscin under reduced pressure, and the pressure blower that pumps the desorbed ozone to the pressurized tank and the water pump that sends water from the pressurized tank are provided. Ozone can be injected into high-pressure water pipes using a small water pump, and a very high-head pump such as an ejector pump can be used without IPVC, which has the effect of lowering initial costs and making power receiving equipment smaller.

[Brief explanation of the drawing]

Figure 1 (a) is a flow diagram of a conventional intermittent ozone supply device; Figure 1 (b) is a vertical cross-sectional view of its adsorption/desorption group;
Figure (c) is a vertical sectional view of the ozone generator, Figure 2 is an operation sequence diagram of a conventional device, and Figure 3 is a flow diagram of an embodiment of the present invention. (11...Ozone generator, (21...Ozone adsorption/desorption tower, (3)...Circulation blower, (4)...Oxygen supply source, (8)...Refrigerating machine, +91...・Ejector, a [・
・・Ejector pump, uD・High pressure water pipe, 07J・
...Pressure blower, u3...Pressure tank, Q4)...
Water supply pump 'i''. In each figure, the same reference numerals indicate the same or corresponding parts. Representative: Shin Tameno - (1 other person) Figure 1 (0) Figure 1 (b)

Claims (3)

[Claims] (1) An ozone generator that generates ozone using oxygen as a raw material, and an ozone adsorption material that adsorbs ozone from the ozone generator when cooled and desorbs the adsorbed ozone when heated and depressurized. A packed ozone adsorption/desorption tower, a refrigerator that cools the ozone adsorption material during ozone adsorption, a circulation floor that pumps the oxygen released from the ozone adsorption tower to the ozone generator, and a brine that warms the ozone adsorption material during ozone desorption. The system is characterized by being equipped with a tank, a pump that circulates brine, an ozone adsorption tower, desorbs dioscin under reduced pressure, a pressure blower that sends the desorbed ozone to a pressurized tank, and a water pump that sends water to the pressurized tank. An intermittent ozone supply device. (2) The intermittent ozone supply device according to claim 1, characterized in that a pressure blower is provided between the circulation blower and the pressure tank. (3) The intermittent ozone supply device according to claim 1 or 2, characterized in that the circulation blower also serves as a pressure blower.