KR102024871B1 - Device for removing residual ozone gas - Google Patents

Abstract

The present invention discloses an apparatus for removing excess ozone gas. The water treatment system includes an ozone treatment tank supplied with treated water from the outside, and an ozone generator for generating and injecting ozone gas into the treated water in the ozone treatment tank, the water treatment system comprising: an excess ozone gas discharge pipe connected to an upper portion of the ozone treatment tank; Ozone gas adsorption means installed in the excess ozone gas discharge pipe to adsorb excess ozone gas; An ozone concentration sensor for detecting excess ozone gas concentration in the excess ozone gas discharge pipe immediately before the ozone gas adsorption means; An ozone sensor for detecting the presence or absence of ozone gas in the excess ozone gas discharge pipe immediately after the ozone gas adsorption means; An exhaust fan for discharging the surplus ozone gas in the ozone treatment tank to the outside through the surplus ozone gas discharge pipe; An ozone gas shutoff valve for opening and closing an excess ozone gas discharge pipe immediately before the ozone gas adsorption means; Water injection means for injecting water into the surplus ozone gas before the surplus ozone gas flows into the ozone gas adsorption means; And control means for controlling the speed of the exhaust fan according to the signal of the ozone concentration detection sensor and turning on / off the ozone generator, the exhaust fan, and the ozone gas shutoff valve according to the signal of the ozone sensor.
The present invention can reliably remove excess ozone gas generated during advanced treatment of sewage / wastewater or water using ozone gas, while increasing the contact effect of ozone treatment tank and life cycle and replacement cycle of activated carbon while reducing power consumption of ozone generator. Can be extended.

Description

Device for removing residual ozone gas

The present invention relates to a technology for purifying water quality using ozone gas in livestock wastewater, sewage treatment plant, swimming pool or water purification plant, and more particularly, ozone gas harmful to human body by effectively removing excess ozone (ozone) gas used in water treatment. The present invention relates to a device for removing excess ozone gas which can reliably prevent the gas from being released into the atmosphere.

The amount of sewage and wastewater discharged by the rapid industrialization is increasing greatly, and with that, various types of pollutants are released. When the wastewater containing these organic matters and solids is discharged to rivers or rivers as they are, they accumulate on the bottom of rivers and rivers, causing secondary pollutants such as nitrogen and phosphorus to become a major cause of eutrophication.

Accordingly, sewage water containing organic matter is treated in various ways in the sewage treatment plant, and a high-treatment method using ozone gas having a strong oxidizing power is mainly used.

On the other hand, as the environment and water pollution become more serious in the aftermath of industrialization, the intake of water is getting higher.In the water treatment plant, the water withdrawn is supplied with high purity. Integer treatment is common.

Because ozone gas has the highest potential difference after fluorine and OH groups, it has a unique strong oxidizing power that can oxidize all metals, microorganisms and organic matters except platinum and silver. It is widely used for removal, and in water treatment, it is widely used to remove taste, odor causing substances and trace harmful substances.

Such ozone does not form special harmful compounds after the reaction, its reaction time is short, its ability to decompose is very good, and because it is inherently unstable and gradually changes to oxygen while slowly decomposing to oxygen, the residual ozone in water is oxygen in a relatively short time. It is widely used in advanced water treatment depending on the characteristics that it does not remain in water by being decomposed into.

However, ozone itself is extremely toxic, and if it is above a certain concentration in the atmosphere, it can cause smells and headaches, as well as pose a fatal threat to health after prolonged exposure. It is also a material that is quite difficult to handle.

Although ozone dissolves relatively well in water, it reacts sensitively to the pressure, temperature, and water quality of the water that is dissolved. The higher the water temperature, the lower the solubility. In particular, the lower the gas-liquid ratio (the ratio of ozone gas and dissolved water), the better the dissolution, and the dissolution rate increases in proportion to the water pressure. However, the normal ozone generator operates under conditions determined based on the maximum injection amount and the maximum water temperature. It is common to do

However, since the flow rate and the temperature of the treated water flowing into the ozone treatment tank, which is a closed structure, are not constant, power consumption due to the operation of the ozone generator has a big problem.

In addition, since the ozone generator operates based on the maximum amount of water and water temperature, surplus ozone gas that remains in contact with water or remains in contact with the water in the upper space of the ozone treatment tank remains. Because of the continuous operation under the conditions, the contact effect of the ozone treatment tank with the power was inevitably inefficient.

In particular, the surplus ozone gas existing in the upper space of the ozone treatment tank needs to be reliably removed when released to the outside because it causes serious adverse effects on the workers of the treatment plant, and various methods for this have been proposed and used.

As an example, Korean Patent No. 10-1529048 discloses degassing dissolved ozone in water by injecting aerated hydrogen peroxide into ozone-treated water and then sending the degassed excess ozone gas to the ozone destruction facility to reduce it to oxygen by a catalyst. To release into the atmosphere is proposed.

However, in order to reduce the ozone gas to oxygen by the catalyst, the ozone gas must be heated together with a catalyst such as manganese dioxide to a predetermined temperature range, and therefore, a separate heating means such as a heater must be provided, and the reduction efficiency is reduced to the excess ozone gas. Because it is affected by the moisture contained a lot, there is a complicated problem that must also be equipped with water removal means such as a dummyster.

In addition, it is well known that irrational problems in which frequent replacement of the catalyst is required and the replacement cost is excessive, are not vulnerable to moisture, and the ozone destruction efficiency may vary depending on the ozone concentration.

1. Korea Patent Registration No. 10-1529048

The present invention was devised to solve the above-mentioned conventional problems, and it is possible to reliably remove surplus ozone gas generated during the advanced treatment of sewage / wastewater or water using ozone gas with a simple configuration, as well as of the ozone generator. It is an object of the present invention to provide a surplus ozone gas removal device that can achieve power saving due to driving and can expect an increase in the contact effect of an ozone treatment tank.

Another object of the present invention is to provide an excess ozone gas removing apparatus capable of extending the life of the excess ozone gas removing means as well as its replacement frequency by minimizing the generation of excess ozone gas.

The surplus ozone gas removing apparatus according to the present invention for achieving the above object is in a water treatment system including an ozone treatment tank supplied with treated water from the outside, and an ozone generator for generating and injecting ozone gas into the treated water in the ozone treatment tank. In

Surplus ozone gas discharge pipe connected to the upper portion of the ozone treatment tank; Ozone gas adsorption means installed in the excess ozone gas discharge pipe to adsorb excess ozone gas; An ozone concentration sensor for detecting excess ozone gas concentration in the excess ozone gas discharge pipe immediately before the ozone gas adsorption means; An ozone sensor for detecting the presence or absence of ozone gas in the excess ozone gas discharge pipe immediately after the ozone gas adsorption means; An exhaust fan for discharging the surplus ozone gas in the ozone treatment tank to the outside through the surplus ozone gas discharge pipe; An ozone gas shutoff valve for opening and closing an excess ozone gas discharge pipe immediately before the ozone gas adsorption means; Water injection means for injecting water into the surplus ozone gas before the surplus ozone gas flows into the ozone gas adsorption means; And controlling means for controlling the speed of the exhaust fan according to the signal of the ozone concentration detection sensor and turning on / off the ozone generator, the exhaust fan and the ozone gas shutoff valve according to the signal of the ozone sensor.

According to one preferred feature of the present invention, the control means is generated and injected in the ozone treatment tank by controlling the driving speed of the exhaust fan and the operation of the ozone generator inversely proportional to the concentration of ozone gas detected by the ozone concentration sensor It minimizes the power consumption of the ozone generator while ensuring the contact time so that the ozone gas can come into contact with the treated water sufficiently.

According to another preferred feature of the present invention, a condensate drain pipe is provided at the gas inlet at the bottom of the ozone gas adsorption means so that one end of the excess ozone gas discharge pipe is connected to the middle of the condensate drain pipe, and the water trap collects condensed water at the bottom of the condensate drain pipe. Surplus ozone gas further comprises a to discharge the condensate condensate safely and easily as it passes through the discharge pipe.

More preferably, the present invention further includes a drain hose connected to the excess ozone gas discharge pipe connected to the gas outlet above the ozone gas adsorption means, to condensate water generated by condensation of moisture in the air passing through the ozone gas adsorption means. Easily separate and discharge with water trap.

According to still another preferred feature of the present invention, the water spraying means includes a water spray nozzle installed in the drain pipe, and a transfer pump installed in the water trap to pump the condensed water collected therein into the water spray nozzle. It is possible to easily spray water on the surplus ozone gas without depending on it.

In addition, the ozone gas adsorption means may be composed of activated carbon known to exhibit excellent performance in ozone removal.

According to the apparatus for removing excess ozone gas according to the present invention, it is possible to reliably remove excess ozone gas generated during advanced treatment of sewage / wastewater or water using ozone gas with a relatively simple configuration unlike the conventional method using the catalytic method. Of course, by adjusting the exhaust speed according to the concentration of excess ozone gas to delay the contact time between the ozone gas and the treated water in the ozone treatment tank, the contact time can be sufficiently secured to increase the contact effect. By appropriately controlling the driving of the generator, it is possible to reduce power.

In particular, by spraying water on the surplus ozone gas immediately before flowing into the ozone gas adsorption means, the excess ozone gas is firstly removed to some extent, and the surplus ozone gas is removed secondly from the ozone gas adsorption means made of activated carbon. In addition to maximizing the gas removal efficiency, it is also possible to extend the life of the activated carbon as much as possible.

In addition, by controlling the discharge rate of the surplus ozone gas, it is possible to minimize the generation of surplus ozone gas discarded by ensuring sufficient contact time in the ozone treatment tank, thereby extending the life of the surplus ozone gas removal means and prolong the replacement frequency. It also has a big effect on cost reduction.

1 is a schematic diagram schematically showing an apparatus for removing excess ozone gas according to the present invention.

Such specific features and other advantages of the present invention, the excess ozone gas removal device will become more apparent from the following description of the preferred embodiment with reference to the accompanying drawings.

In Figure 1, the excess ozone gas removing apparatus according to the present invention, the excess ozone gas discharge pipe (10) connected to the upper portion of the ozone treatment tank (1), the excess ozone gas discharge pipe (10) is installed in the excess ozone gas Ozone gas adsorption unit (20) for adsorption, ozone concentration detection sensor (30) for detecting excess ozone gas concentration in excess ozone gas discharge pipe (10) immediately before ozone gas adsorption unit (20), and ozone gas adsorption means (20) ) Immediately after the ozone sensor 40 for detecting the presence of ozone gas in the excess ozone gas discharge pipe 10 and the exhaust fan for discharging the excess ozone gas in the ozone treatment tank 1 to the outside through the excess ozone gas discharge pipe 10. (50), the ozone gas shutoff valve (60) for opening and closing the excess ozone gas discharge pipe (10) immediately before the ozone gas adsorption unit (20), and the exhaust fan (50) in accordance with the signal of the ozone concentration detection sensor (30). Control the speed, and exhaust the ozone generator 2 and exhaust according to the signal from the ozone sensor 40 To 50 and the ozone gas shut-off valve 60 is configured to include a controller 70 for turning on / off.

First, the apparatus for removing excess ozone gas of the present invention is provided in a system for highly treating water using ozone gas in sewage / wastewater or water purification plants, and the ozone treatment tank 1 to which treated water W is supplied, Basically, the ozone generator 2 which injects ozone gas into this ozone treatment tank 1 is included.

The ozone treatment tank 1 has a sealed structure to prevent ozone gas from being discharged to the outside, and a treatment water supply pipe 1a supplied by the treatment water W from the outside is connected to an upper side thereof, and an ozone gas and The treated water drain pipe 1b for contacting and discharging the treated water W to be discharged in a subsequent process is connected.

On the other side of the upper portion of the ozone treatment tank 1, there is provided a check valve 1c into which outside air is introduced so that a vacuum is not formed inside the ozone treatment tank 1 when the excess ozone gas is discharged by the exhaust fan 50. It is.

The ozone generator 2 is connected to the acid pipe 3 provided at the bottom of the ozone treatment tank 1 by an ozone gas injection pipe 4 to inject the generated ozone gas into the treated water W. The gas injection pipe 4 is provided with a check valve 5 for automatically opening and closing it.

Although only one ozone treatment tank 1 may be provided, several may be provided in parallel as shown in order to rapidly treat a large amount of treated water (W).

The excess ozone gas discharge pipe 10 has an inlet 11 connecting the upper portion of the ozone treatment tank 1 to the gas inlet of the ozone gas adsorption unit 20 and an air outlet of the ozone gas adsorption unit 20. It is connected to the outlet portion 12 for discharging the air to remove the excess ozone gas to the atmosphere.

The ozone gas adsorption unit 20 includes a chamber 21, a plurality of strainers 22 provided with a space in the lower part of the chamber 21, and a gravel layer formed on the strainer 22. (23) and the activated carbon 24 laminated on the gravel layer 23, a space is formed in the upper portion of the activated carbon 24 so that the air from which ozone gas has been removed can be easily discharged.

The gravel layer 23 induces the excess ozone gas diffused and ejected from each strainer 22 to be evenly dispersed and contacted on the activated carbon 24.

The ozone concentration sensor 30 is installed at the inlet 11 of the excess ozone gas discharge pipe 10 to detect the concentration of the warm gas in the air discharged from the ozone treatment tank 1 and send it to the controller 70.

The ozone sensor 40 is installed at the outlet 12 of the surplus ozone gas discharge pipe 10 and passes through the ozone gas adsorption unit 20 to detect the presence of ozone in the air from which the ozone is removed and the controller 70. Send it out.

The exhaust fan 50 is installed at the outlet 12 of the surplus ozone gas discharge pipe 10 to discharge surplus ozone gas remaining in the upper space in the ozone treatment tank 1 to the outside, and a control signal of the controller 70. According to the rotation speed is appropriately adjusted.

The ozone gas shutoff valve 60 is installed at the inlet 11 of the excess ozone gas discharge pipe 10 to open and close the excess ozone gas discharge pipe 10 according to a control signal of the controller 70 to adsorb the ozone gas into the excess ozone gas. The inflow into the unit 20 is controlled.

The controller 70 incorporates a predetermined control algorithm to control the driving of the exhaust fan 50, the ozone gas shutoff valve 60, and the ozone generator 2 according to the concentration and presence of excess ozone gas discharged. When the ozone sensor 40 detects ozone gas for safer operation, the controller 70 is provided with an alarm means, for example, an alarm buzzer 71 or an alarm lamp 72, which can display a dangerous situation. It is desirable to.

The controller 70 controls the rotational speed of the exhaust fan 50 to be lowered when the concentration of the warmed gas is determined by the signal input from the ozone concentration sensor 30, and when the concentration is low, the exhaust fan ( 50) to increase the rotation speed. Then, the ozone gas in the ozone treatment tank 1 remains in the ozone treatment tank 1 for a longer time, thereby ensuring a reaction time in which the ozone gas can be sufficiently brought into contact with the treated water W. Accordingly, the ozone treatment This results in an increase in the contact effect of the bath (1).

The dissolution rate of ozone gas varies depending on the amount and temperature of the treated water (W). If the contact between the ozone gas and the treated water (W) is not good, the amount of excess ozone gas is generated, and conversely, In this case, since the amount of excess ozone gas is reduced, the contact speed in the ozone treatment tank 1 is increased by controlling the rotation speed of the exhaust fan 50 in inverse proportion to the concentration of the excess ozone gas discharged.

In addition, if the operation of the ozone generator 2 is properly controlled according to the concentration of the surplus ozone gas, the contact effect of the ozone treatment tank 1 can be maximized while minimizing the amount of excess ozone gas, as well as the ozone generator ( Power consumption of 2) can also be minimized, and furthermore, the life and replacement cycle of the ozone gas adsorption unit 20 can be extended.

That is, when the concentration of the excess ozone gas is high, the amount of ozone production of the ozone generator 2 is reduced or temporarily stopped, and when the concentration is lower than a predetermined value, the control is performed to operate normally.

On the other hand, when ozone gas is detected by the ozone sensor 40, the controller 70 indicates the dangerous situation through the alarm buzzer 71 and the alarm lamp 72 and at the same time the life of the ozone gas adsorption unit 20 has reached the end. By judging, the operation of the exhaust fan 50 and the ozone generator 2 is stopped, and the ozone gas shutoff valve 60 is turned off to close the excess ozone gas discharge pipe 10.

Subsequently, when the activated carbon 24 of the ozone gas adsorption unit 20 is replaced, and then the operation of the alarm means 71 or 72 is stopped, normal ozone gas is removed again to remove excess ozone gas.

On the other hand, the excess ozone gas not only contains a lot of heat at the time of generation, but also discharges through the treated water (W), and therefore contains a small amount of water, which is relatively low when transported through the excess ozone gas discharge pipe (10). Condensate may be generated in the discharge pipe 10 by contacting the discharge pipe 10 at a temperature.

Accordingly, the present invention vertically provided a condensate drain pipe 25 at the lower gas inlet of the ozone gas adsorption unit 20 to connect the inlet 11 of the excess ozone gas discharge pipe 10 to the middle of the condensate drain pipe 25. In addition, it is preferable to further include a water trap 80 in which the condensate is collected in the lower portion of the condensate drain pipe 25.

In addition, a small amount of moisture remains in the air from which the ozone gas is removed while passing through the ozone gas adsorption unit 20, so that condensed water may be generated in the outlet portion 12 of the excess ozone gas discharge pipe 10. Likewise, the outlet portion 12 of the discharge pipe 10 may be more preferably provided with a drain hose 90 which guides the condensed water to the water trap 80.

At this time, since ozone does not remain in the condensed water collected by the water trap 80, it may be discharged as it is.

On the other hand, the present invention can effectively remove the excess ozone gas even with such a configuration, but more preferably, the excess ozone gas by spraying water to the excess ozone gas before the excess ozone gas is introduced into the ozone gas adsorption unit 20 It further comprises a water injection means 100 for primary gas removal.

The water spraying means 100 may be configured in various forms, for example, the water spray nozzle 110 installed in the drain pipe 25 downstream of the inlet 11 of the excess ozone gas discharge pipe 10 as shown. And a transfer pump 120 installed in the water trap 80 to pump the condensed water collected therein into the water spray nozzle 110, and a condensate transfer hose connecting the transfer pump 120 to the water spray nozzle 110. 130).

Here, the water sprayed from the water spray nozzle 110 may be supplied from an external water supply source, but the condensed water collected in the water trap 80 is discarded anyway, so the condensed water is recycled to the ozone gas adsorption unit 20. By spraying the excess ozone gas immediately before flowing in, the excess ozone gas is first removed to some extent.

In this case, the excess ozone gas discharged from the treatment tank 1 is first removed by using the condensed water generated in the excess ozone gas, and then the second ozone gas adsorption unit 20 is secondarily removed. Not only can be removed, it is possible to greatly extend the life of the activated carbon 24 of the ozone gas adsorption unit (20).

1: ozone treatment tank 2: ozone generator
3: diffuser 10: excess ozone gas discharge pipe
11 inlet 12: outlet
20: ozone gas adsorption unit 24: activated carbon
25: condensate drain pipe 30; Ozone Concentration Sensor
40: ozone sensor 50: exhaust fan
60: ozone gas shutoff valve 70: controller
71: alarm buzzer 72; Alarm lamp
80: water trap 90: drain hose
100: water spray means 110: water spray nozzle
120: transfer pump 130: condensate transfer hose

Claims (5)

A water treatment system comprising an ozone treatment tank supplied with treated water from the outside and an ozone generator for generating and injecting ozone gas into the treated water in the ozone treatment tank,
Surplus ozone gas discharge pipe connected to the upper portion of the ozone treatment tank;
Ozone gas adsorption means installed in the excess ozone gas discharge pipe to adsorb excess ozone gas;
An ozone concentration detection sensor for detecting an excess ozone gas concentration in the excess ozone gas discharge pipe immediately before the ozone gas adsorption means;
An ozone sensor for detecting the presence or absence of ozone gas in said excess ozone gas discharge pipe immediately after said ozone gas adsorption means;
An exhaust fan for discharging the surplus ozone gas in the ozone treatment tank to the outside through the surplus ozone gas discharge pipe;
An ozone gas shutoff valve for opening and closing the excess ozone gas discharge pipe immediately before the ozone gas adsorption means;
Water injection means for injecting water into said excess ozone gas before said excess ozone gas flows into said ozone gas adsorption means; And
And controlling means for controlling the speed of the exhaust fan according to the signal of the ozone concentration sensor and turning on / off the ozone generator, the exhaust fan, and the ozone gas shutoff valve according to the signal of the ozone sensor.
The condensate drain pipe is provided at the gas inlet of the lower end of the ozone gas adsorption means, one end of the excess ozone gas discharge pipe is connected to the middle of the condensate drain pipe,
Surplus ozone gas removal device further comprises a water trap for collecting condensate water in the lower portion of the condensate drain pipe.
delete delete The method according to claim 1,
And a drain hose connected to the surplus ozone gas discharge pipe connected to the gas outlet of the upper portion of the ozone gas adsorption unit to direct condensed water to the water trap.
The method according to claim 1,
And a water spraying means comprising a water spray nozzle installed in the condensate drain pipe and a transfer pump for transporting the condensate collected and collected in the water trap to the water spray nozzle.

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