JPS5925724B2 - Continuous ozone addition equipment - Google Patents

Description

Detailed Description of the Invention The present invention separates only ozone from the ozone-containing gas generated by an ozone generator, and continuously adds this to a carrier gas (a gas that carries ozone to the desired ozone usage location). The present invention relates to a continuous ozone addition device that is capable of achieving continuous ozone addition.

More specifically, ozone in the ozone-containing gas generated by an ozone generator is once adsorbed on an adsorbent such as silica gel, and a carrier gas such as air is passed through this adsorbent to add ozone to the carrier gas. Continuous ozone addition equipment that enables the process to be carried out continuously, reducing the scale of this type of equipment compared to conventional batch-type equipment, and simplifying its operation as much as possible. Regarding.

Recently, ozone has been widely used for various purposes such as oxidizing nitrogen monoxide in flue gas denitrification equipment, decomposing cyanide compounds in various water treatment equipment, and sterilizing. There is a growing desire to improve the performance of peripheral devices.

Various ozone generator structures are known, but their basic function is to apply a high voltage to oxygen to ionize it and generate ozone.

As a raw material for ozone, there are those that use air and generate ions by ionizing the oxygen it contains, and those that use separately generated high-purity oxygen gas.

The former type of ozone generator that uses air has the advantage that the raw material cost is extremely low because there is an unlimited amount of raw material, but on the other hand, there is only about 20% oxygen in the air, and there is no oxygen. The disadvantage is that the amount of ozone produced is small compared to the power input for oxygen ionization.

On the other hand, the latter, that is, ozone generators that use high-purity oxygen gas as a raw material, has the advantage of producing a large amount of ozone, contrary to the former, but on the other hand, the cost of raw materials is high. It has the following drawback.

By the way, ozone-containing gas obtained by an ozone generator (i.e., a mixed gas of ozone, nitrogen, oxygen, etc. if air is used as a raw material, or a mixture of oxygen and ozone if oxygen gas is used as a raw material) The ozone concentration in the mixed gas (mixed gas) is generally very small, and even in the ozone generator using oxygen gas as the raw material, it is only about 20% by weight, and most of the remaining ozone, that is, about 98.0% by weight. The majority is occupied by oxygen.

However, as a matter of course, gases other than ozone, which account for most of the ozone-containing gas, do not contribute to the desired treatment process even if they are sent as they are to, for example, a sterilizer that requires ozone. Sometimes it can be a hindrance.

In addition, especially in ozone-containing gas obtained from ozone generators that use oxygen gas as a raw material, most of the components other than ozone are dominated by oxygen, which is relatively expensive and can be reused as a raw material for ozone. Therefore, it was thought that it would be extremely wasteful to send this to a process ζ that does not contribute anything and consume it.

Therefore, the ozone-containing gas conventionally produced using this kind of oxygen as a raw material is cooled and then sent to a container filled with an adsorbent such as silica gel called an absorber, where only the ozone in the ozone-containing gas is removed. is adsorbed on the adsorbent and separated and removed from the gas, and the oxygen gas from which ozone has been removed is recovered and heated, and then reused as a raw material for the ozone generator.

On the other hand, a carrier gas such as air (a gas that carries ozone to the desired ozone usage location) is inside the adsorber after the adsorption process has been completed.
was introduced, and the adsorbed ozone was added to this carrier gas and transported to the place where ozone was used.

In the ozone adsorption process and the ozone addition process in this adsorber, two different gases (i.e., ozone-containing oxygen and air) pass through the adsorber, and these gases are not allowed to mix. Therefore, in conventional adsorbers, the process of adsorbing ozone and the process of removing the adsorbed ozone from the adsorbent and adding it to the carrier gas (air, etc.) cannot be performed simultaneously, and so-called batch operation is required. It was

Therefore, in order to continuously or steadily supply ozone to a place where ozone is conventionally used, as shown by the thick line in Figure 1, a blower a, a reversing heat exchanger b, an expansion turbine C1, a heat exchanger d, and an ozone concentration A plurality of adsorbers g19g29g39g4 are installed in parallel in the carrier gas path A that passes through the buffer e and returns to the reparsing heat exchanger to the desired ozone-using equipment f. The adsorption machines were operated in such a way that one adsorption machine was always in the ozone addition process by having each adsorption machine complete its processes (adsorption process, oxygen recovery process, ozone addition process, and air removal process). .

For this reason, conventional ozone supply equipment of this type requires a large space to install a large number of adsorbers, and these adsorbers are
Pipe line B for ozone-containing gas sent from the ozone generator via the purging heat exchanger to each inlet and outlet of the pipe B, ozone is removed from the adsorber ζ, and then transferred to the reversing heat exchanger b1 and the blower i. A pipe line C1 for recovered oxygen that returns to the ozone generator via a pipe line D connected to a flask J for completely suctioning and removing residual oxygen in the adsorber after the adsorption process is completed, and a pipe D that connects to the absorber after the addition process is completed. As a large number of pipes such as pipe E for suctioning and removing the air remaining in the absorber are connected, the area around the adsorber g19g29g39g4 is a complex arrangement of pipes A and -E. This required a large space and was often inconvenient for maintenance work.

In addition, each of these pipes A to D is equipped with a carrier gas cutoff valve. ni2 s k3 t k4...k8.
Carrier gas vent valves 11, 12, 13, 14. Ozone-containing gas cutoff valve m1, m2...m8. Ozone-containing gas vent valve nl.

A large number of valves such as n2, .

In the figure, P is an ozone decomposer used during the air removal process, and q is an air removal blower.

In view of the above-mentioned problems in conventional ozone supply equipment of this type, the inventors of the present invention have devised the present invention as a result of intensive research to effectively solve these problems.

The object of the present invention is to provide an ozone-containing gas passage, a carrier gas passage, a rotating container that rotates while intersecting these passages and is surrounded by a breathable member, and a rotary container that rotates while intersecting with these passages. and an adsorbent filled in a container, and as the rotating container rotates, ozone contained in the ozone-containing gas is adsorbed by the adsorbent, and this is continuously added to the carrier gas. To provide a continuous ozone addition device capable of simultaneously performing a step of adsorbing ozone onto an adsorbent and a step of adding the adsorbed ozone to a carrier gas.

Another object of the present invention is to allow ozone-containing gas and carrier gas to pass through their own passages, and to circulate an adsorbent between these passages by means of a rotating container provided to intersect with these passages. By doing this, unlike conventional batch-type adsorbers, there is no need for various valves to switch the passing gas, and therefore there is no need for complex sequence circuits such as valve opening/closing control. To provide a continuous ozone addition device.

Furthermore, it is an object of the present invention to make it possible to continuously add zero ozone to a carrier gas by having the above-described structure, and to provide a standby machine like a conventional batch-type adsorber. To provide a continuous ozone addition device which can eliminate the need for this type of equipment, reduce the equipment cost of this type of equipment, and reduce the occupied area as much as possible.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The drawings are for explaining one embodiment of the present invention, and Fig. 1 is a system diagram of a conventional ozone supply equipment, Fig. 2 is a system diagram of an ozone supply equipment using the device of the present invention, and Fig. 3 is a system diagram of a conventional ozone supply equipment. FIG. 4 is a side sectional view of the device of the invention, FIG. 4 is a front view of a half-cut front view of the device of the invention, and FIG. 5 is a front view showing another embodiment of the device of the invention.

As shown in FIGS. 3 and 4, 1 shows an example of a continuous ozone addition device according to the present invention, and the continuous ozone addition device 1 (hereinafter simply referred to as the addition device) is surrounded by a breathable member. It consists of an enclosed rotating container 2 and a casing 3 that rotatably accommodates the rotating container 2.

In the illustrated example, the rotary container 2 is formed into a disk shape with a thickness of d, and its interior is partitioned by a cylindrical partition wall 4.
A donut-shaped adsorbent filling chamber S1 is formed, and this adsorbent filling chamber S1 is filled with an adsorbent 5 such as silica gel.

Surfaces 5a and 6b facing each other with the adsorbent filling chamber S1 in between? A ventilation wall γa, 7b made of an air permeable member such as a wire mesh is stretched, and the peripheral side wall 8 of the adsorbent filling chamber S1 is formed of a non-air permeable member (thus, the outer periphery of the rack 9 is It is formed into a band shape.

A rotating shaft 10 is inserted through the center of the rotating container 2 through the space S2 surrounded by the cylindrical partition wall 4, and this rotating shaft 10 has a circular shape provided opposite to the center of the rotating container 2. It is integrally fixed to the support plates 11a and 11b.

Therefore, when the rotating shaft 10 is rotated, the rotating container 2 is also rotated integrally.

In the examples shown in FIGS. 3 and 4, the casing 3 housing the rotating container 2 is located at both ends 1 of the rotating shaft 10 of the rotating container 2.
0a and 10b are supported via bearings 12a and 12b,
In addition, shaft support plates 13a and 13b made of elongated plates are provided at opposite positions sandwiching the center of the rotary container 2, and a substantially semicircular arc portion 2a of the rotary container 2 facing from both sides of these shaft support plates 13a and 13b. , 2b, respectively.

Semicircular openings 14a, 14b, and 14c are provided on opposing surfaces of the semicircular surrounding members 3a and 3b that sandwich the rotary container 2 therebetween.

14d is formed, thereby forming a passage A for ozone-containing gas flowing through the opening 14b, the adsorbent filling chamber S1, and the opening 14b, and a passage opening for the carrier gas flowing through the opening 14c, the adsorbent filling chamber S1, and the opening 14d. has been done.

Semicircular surrounding members 3a, 3b and ventilation wall γa of rotating container 2
, 7b are provided with seal members 15a and 15b.
are inserted, and these seal members 15a, 15b
This prevents the carrier gas from being mixed into the ozone-containing gas when the rotating container 2 (described later) rotates.

Further, a rotary drive source 16 such as an electric motor is installed on the circumferential side of the semicircular surrounding member 3b, and a pionine 17 attached to the tip of the rotating shaft is formed on the circumferential side wall 8 of the rotating container 2. The rotary container 2 is configured to rotate within the casing 3 by meshing with the rack 9 .

Next, the operation of the apparatus of the present invention having the above configuration will be explained in detail.

The following description will be made with reference to an example in which the apparatus of the present invention is employed in an ozone supply facility as shown in FIG. 2Q.

As shown in FIG. 2, the carrier gas introduction opening 14c of the ozone addition device 1 has a carrier gas conduit A that passes through a blower a, a reversing heat exchanger b, an expansion turbine C1 and a heat exchanger d.

is connected to the carrier gas exhaust opening 14d, and a carrier gas conduit A2 heading to the ozone-using equipment f via a beam purging heat exchanger is connected to the carrier gas discharge opening 14d.

On the other hand, the ozone-containing gas inlet 14b of the ozone addition device 1
<Here, a pipe line B1 for ozone-containing gas (ozone-containing oxygen) coming from an ozone generator via a reversing heat exchanger b and a heat exchanger d is connected to the ozone-containing waste discharge port 14a (maripaging A return line B2 for oxygen from which ozone has been removed returns to the ozone generator via the heat exchanger b and the blower 1 is connected.

In the above configuration, when the rotational drive source 16 provided in the ozone addition device 1 is driven, the rotational force is transmitted to the rotating container 2 via the pinion 17 and the rack 9, and the rotating container 2 rotates within the casing 3.

In this state, the ozone-containing oxygen gas supplied to the ozone-containing gas inlet 14b passes through the ventilation wall 7b of the rotating container 2 and enters the adsorbent filling chamber S1, where the ozone in the ozone-containing oxygen gas is The oxygen gas, which is adsorbed by the adsorbent 5 and removed from the gas, and which contains almost no ozone after the removal, passes through the ventilation wall 7a and is discharged from the ozone-containing gas outlet 14a to the outside of the ozone addition device 1, and finally It is then returned to the ozone generator for reuse.

The adsorbent 5 that has adsorbed ozone in the above steps rotates inside the casing 3 in the direction shown by the arrow in FIG. 4 as the rotating container 2 rotates, and is conveyed to the carrier gas passage opening side.

On the other hand, the carrier gas such as air supplied to the carrier gas inlet 14c passes through the ventilation wall 7a and enters the adsorbent filling chamber S.
1, where it comes into contact with the adsorbent 5 that adsorbed ozone in the previous step, and due to this contact, ozone is transferred to the adsorbent 5.
The ozone-added carrier gas passes through the ventilation wall 7b and is discharged from the ozone addition device 1 through the carrier gas outlet 14d, and finally to the ozone-using equipment f. Sent.

In this way, the adsorbent 5 from which ozone has been removed or desorbed is returned to the ozone-containing gas passage A side as the rotating container 2 rotates, and by continuously repeating the above steps, the ozone in the ozone-containing gas is Only the carrier gas can be continuously added to the carrier gas.

In addition, in the above ozone adsorption or ozone addition (desorption) process, the pressure of the carrier gas is set slightly lower than the pressure of the ozone-containing gas, so that the carrier gas is an ozone-containing gas (in this example, ozone-containing oxygen). Care has been taken to prevent ozone from being mixed into the ozone generator and reducing the efficiency of the ozone generator.

In addition, as a means to more reliably prevent the carrier gas from being mixed into the ozone-containing oxygen, the shaft support plates 13a and 13b are each formed into a Y-shape as shown in FIG. A and a carrier gas passage opening are each formed into a sector-shaped cross section, and a buffer chamber C is provided between these passages 490, and a small amount of oxygen is supplied to this chamber and suctioned by an exhaust blower (not shown). Depending on the method, it is possible to more reliably prevent the carrier gun from being mixed into the recovered oxygen gas.

As described above, according to the present invention, as many as four adsorbers g19g29 needed for the conventional ozone supply equipment shown in FIG.
g39g4 is the continuous ozone addition device 1- according to the present invention.
Since the ozone adsorption process and the ozone addition (desorption) process can be performed simultaneously in parallel, various valves are required to switch the gas that passes through the adsorber, as in conventional adsorbers. The ozone decomposer P, which was no longer required at all and was required in the air removal process,
Ancillary equipment such as air vent blower q can be significantly reduced.

Therefore, compared to conventional equipment of this type, the cost required for equipment is lower.
The occupied area can be reduced as much as possible and the control can be made as easy as possible.

In summary, according to the present invention, there is provided an ozone-containing gas passage, a carrier gas passage, a rotating container that rotates while intersecting these passages and is surrounded by an air-permeable member, and and an adsorbent filled in a container, and as the rotating container rotates, ozone contained in the ozone-containing gas is absorbed by the adsorbent, and this is continuously added to the carrier gas. Otherwise, the process of adsorbing ozone onto the adsorbent and the process of adding the adsorbed ozone to the carrier gas can be performed simultaneously and in parallel.

Further, according to the present invention, the ozone-containing gas and the carrier gas are passed through their own passages, and the adsorbent is circulated between these passages by means of a rotating container provided to intersect with these passages. Therefore, unlike conventional batch-type adsorbers, there is no need for various valves to switch the gas passing through, and therefore, there is no need for complex sequence circuits required to control the opening and closing of valves.

Furthermore, according to the present invention, with the above configuration, it is possible to continuously add ozone to the carrier gas, and there is no need to provide a standby machine like in the conventional batch-type adsorber. It is extremely practical as it exhibits excellent features such as being able to reduce the cost of equipment and reducing the area it occupies as much as possible.

[Brief explanation of the drawing]

The drawings are for explaining one embodiment of the present invention, and Fig. 1 is a system diagram of a conventional ozone supply equipment, Fig. 2 is a system diagram of an ozone supply equipment using the device of the present invention, and Fig. 3 is a system diagram of a conventional ozone supply equipment. FIG. 4 is a side sectional view of the device of the invention, FIG. 4 is a front view of a half-cut front view of the device of the invention, and FIG. 5 is a front view showing another embodiment of the device of the invention. In addition, in the drawing, A is a passage for ozone-containing gas, the opening is a passage for carrier gas, 1 is a continuous ozone addition device, 2 is a rotating container,
7a and 7b are ventilation walls made of a ventilation member.

Claims (1)

[Claims] 1. An ozone-containing gas passage, a carrier gas passage,
It consists of a rotating container that rotates while intersecting these passages and is surrounded by a breathable member, and an adsorbent filled in the rotating container, and as the rotating container rotates, the ozone-containing gas is released. 1. A continuous ozone addition device, characterized in that the ozone contained therein is adsorbed by the adsorbent, and the adsorbed ozone is continuously added to the carrier gas.