KR102259593B1 - Exhaust gas treatment apparatus using ozone bubble - Google Patents

Abstract

An exhaust gas processing apparatus according to an embodiment of the present invention, according to an aspect of the present invention, a scrubber for accommodating the exhaust gas; a bubble generator that receives the washing water and forms ozone bubbles in the washing water; an ultrasonic generator for providing ultrasonic waves to the bubble generator so that ozone bubbles are miniaturized; and a supply line for supplying the washing water containing ozone bubbles from the bubbler to the inside of the scrubber.

Description

Exhaust gas treatment device using ozone bubbles {EXHAUST GAS TREATMENT APPARATUS USING OZONE BUBBLE}

The present invention relates to an exhaust gas treatment apparatus using ozone bubbles.

Exhaust gas (exhaust gas) emitted from chemical processes, semiconductor manufacturing processes, or transportation means such as automobiles and ships is not only harmful to the human body because it is toxic, explosive and corrosive, but also causes environmental pollution when released into the atmosphere. it can be this Accordingly, the exhaust gas must be subjected to a purification process for lowering the content of harmful components to an allowable concentration or less, and only the exhaust gas that has undergone the purification process to remove toxic substances is obliged to be discharged into the atmosphere.

In particular, the International Maritime Organization (IMO) has strengthened environmental regulations in the field of ballast water and exhaust gas, and from January 1, 2020, all ships engaged in international voyages are subject to emission control in all seas around the world. decided to reduce the sulfur content of marine fuels. According to the decision, ships mainly use fuel oil (or natural gas or methanol fuel) with a sulfur content of 0.5% (m/m) or less as fuel for engines, auxiliary engines and boilers, or post-treatment of exhaust gas having an equivalent or higher effect device must be used.

Typical hazardous substances in exhaust gas are nitrogen oxides (NOx), sulfur oxides (SOx), and fine dust (PM). Methods for treating these various harmful exhaust gases include a burning method, a wet method, an adsorption method, and the like.

The combustion method is a method of treating exhaust gas by decomposing flammable gas containing mainly hydrogen gas at a high temperature of about 500°C to 800°C in a high-temperature combustion chamber. It is a method of treating exhaust gas by dissolving it, and the adsorption method is a method of passing harmful gas that does not ignite or does not dissolve in water through an adsorbent to be purified by physical or chemical adsorption.

A number of devices for removing the above-mentioned harmful substances have been developed, and the inventor of the present invention has completed the present invention after long research and trial and error for an exhaust gas treatment device for effectively removing harmful substances.

An object of the present invention is to provide an exhaust gas treatment apparatus capable of effectively treating the exhaust gas.

Still other objects, not specified, of the present invention will be additionally considered within the range that can be easily deduced from the following detailed description and effects thereof.

According to an aspect of the present invention, a scrubber for accommodating the exhaust gas; a bubble generator that receives the washing water and forms ozone bubbles in the washing water; an ultrasonic generator for providing ultrasonic waves to the bubble generator so that ozone bubbles are miniaturized; and a supply line for supplying washing water containing ozone bubbles from the bubble generator to the inside of the scrubber, an exhaust gas treatment apparatus using ozone bubbles is provided.

The bubble generator includes a dissolution tank for accommodating washing water; and an ozone supplier for supplying ozone to the dissolution tank, wherein the ultrasonic generator may include a vibrator immersed in the washing water in the dissolution tank.

The ozone supplier includes an ozone generator for generating ozone; And it may include an ozone pressurizing unit for moving the ozone to the dissolution tank.

Washing water containing ozone bubbles may be introduced from an upper portion of the scrubber, and exhaust gas may be introduced from a lower portion of the scrubber.

The scrubber is installed on a ship, and the washing water may include seawater.

According to an embodiment of the present invention, it is possible to effectively remove nitrogen oxides and sulfur oxides in the exhaust gas.

On the other hand, even if it is an effect not explicitly mentioned here, it is added that the effect described in the following specification expected by the technical features of the present invention and the provisional effect thereof are treated as described in the specification of the present invention.

1 is a view showing an exhaust gas treatment apparatus using ozone bubbles according to an embodiment of the present invention.
2 is a view showing an example of an ultrasonic generator according to an embodiment of the present invention.
The accompanying drawings are exemplified by reference for an understanding of the technical idea of the present invention, and the scope of the present invention is not limited thereto.

In describing the present invention, when it is determined that the subject matter of the present invention may be unnecessarily obscured as matters that are apparent to those skilled in the art with respect to known functions related to the present invention, detailed descriptions thereof will be omitted.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof does not preclude in advance.

Hereinafter, an embodiment of an exhaust gas treatment apparatus using ozone bubbles according to the present invention will be described in detail with reference to the accompanying drawings, and in the description with reference to the accompanying drawings, the same or corresponding components are given the same reference numbers, A redundant description thereof will be omitted.

1 is a view showing an exhaust gas treatment apparatus using ozone bubbles according to an embodiment of the present invention, and FIG. 2 is a view showing an example of an ultrasonic generator according to an embodiment of the present invention.

1, the exhaust gas treatment apparatus using ozone bubbles according to an embodiment of the present invention includes a scrubber 100, a bubble generator 200, an ultrasonic generator 300, and a supply line (L). can do.

The scrubber 100 is a chamber provided with a space therein, and may have a truncated cone shape in which the horizontal cross section becomes narrower toward the bottom, but is not limited thereto. The exhaust gas G1 is accommodated in the internal space of the scrubber 100 . The exhaust gas G1 is a gas containing pollutants (harmful substances) such as nitrogen oxides (NOx) and sulfur oxides (SOx), and may be discharged from an engine, a generator, a boiler, and the like of a vehicle. For example, it may be discharged from the engine of a ship. The exhaust gas G1 may be introduced into the scrubber 100 through the exhaust gas line L1 .

The scrubber 100 is provided with an exhaust gas inlet 110 and a gas outlet 120 .

The exhaust gas inlet 110 is installed under the scrubber 100 to provide a passage through which the exhaust gas G1 flows into the scrubber 100 . That is, the exhaust gas inlet 110 is connected to the exhaust gas line (L1).

The gas outlet 120 is installed on the upper portion of the scrubber 100 to provide a passage through which the treated gas G2 is discharged. The exhaust gas G1 introduced into the scrubber 100 rises and comes into contact with the washing water W1, and the gas G2 from which contaminants are removed by the washing water W1 is discharged to the outside through the gas outlet 120. can be emitted. On the other hand, the exhaust gas inlet 110 and the gas outlet 120 may be implemented in the form of a pipe.

A filler 130 is provided inside the scrubber 100 , and the exhaust gas G1 may rise through the filler 130 . The filler 130 may increase the residence time of the exhaust gas G1 by filling at least a portion of the inside of the scrubber 100 . The filler 130 may include a plurality of granules.

The filler 130 forms a layer having a predetermined thickness, the filler layer 130 is formed in plurality inside the scrubber 100, and the plurality of filler layers 130 may be spaced apart from each other in the vertical direction.

A demister 140 may be installed in the upper portion of the inside of the scrubber 100 . The demister 140 may remove moisture from the exhaust gas G1. The demister 140 is formed by stacking a plurality of meshes in multiple layers, and may minimize corrosion of the scrubber 100 and the gas outlet 120 by removing moisture in the treated exhaust gas G1 .

The cleaning water W1 is sprayed into the scrubber 100 . The scrubber 100 is installed on a ship, and the washing water W1 may include seawater SW. The washing water W1 injected from the inside of the scrubber 100 is collected under the scrubber 100, and the collected waste washing water W2 is discharged through the waste washing water outlet and the discharge line L2 to the outside (for example, may be discharged into the ocean). Meanwhile, the waste washing water W2 may be circulated and reused as the washing water W1. Here, the waste washing water W2 may be reused as the washing water W1 after being purified through a water treatment device. In addition, the waste washing water W2 may be discharged to the sea after being purified through a water treatment device.

The washing water W1 sprayed from the inside of the scrubber 100 may contain ozone bubbles. _{Ozone bubbles may be formed by dissolving ozone (O 3} ) gas, which is a strong oxidizing agent, in washing water (W1), and a single bubble may have a size of 900 nm to 100 μm, but is not limited thereto. However, at least a portion of the ozone bubbles contained in the washing water W1 may be nano-sized as ultrafine bubbles of 900 nm or less.

Ozone bubbles may be in contact with the exhaust gas (G1) inside the scrubber (100). Here, ozone may react with the exhaust gas G1 to change the exhaust gas G1 into an easily soluble form.

For example, ozone can react with nitrogen oxides, and the reaction formula is as follows.

That is, ozone as an oxidizing agent oxidizes nitrogen monoxide to make nitrogen dioxide, and finally becomes nitric acid, is dissolved in the washing water W1, and may be discharged to the outside.

Hereinafter, the washing water W1 and ozone bubbles will be described in detail.

The bubble generator 200 receives the washing water W1, and forms ozone bubbles in the washing water W1. For convenience of description, the ozone bubble formed by the bubble generator 200 is referred to as a 'primary bubble (B1)'. The size of the primary bubble B1 is greater than 900 nm, and may be a micro size of 100 μm or less.

The bubble generator 200 may include a dissolution tank 210 and an ozone supplier 220 .

The washing water W1 is accommodated in the dissolution tank 210 , and the washing water W1 may be derived from seawater SW. The seawater SW may be introduced into the dissolution tank 210 through the seawater line L3 by a pump. Meanwhile, the washing water W1 may be provided by purifying the waste washing water W2 discharged through the scrubber 100 and circulating into the dissolution tank 210 .

The ozone supply 220 supplies ozone gas into the dissolution tank 210 so that ozone is dissolved in the washing water W1 in the dissolution tank 210 . The ozone supply 220 may include an ozone generating unit, an ozone storage unit, and an ozone pressurizing unit.

The ozone generator may generate ozone using air, oxygen, or the like. The ozone storage unit stores the generated ozone, and the ozone storage unit may be omitted if necessary. The ozone pressurizing unit pressurizes ozone and delivers it to the dissolution tank 210 . The ozone pressurizing unit may increase the solubility of ozone by providing ozone at a high pressure.

As described above, ozone bubbles generated in the dissolution tank 210 by the bubble generator 200 may be referred to as primary bubbles B1.

The ultrasonic generator 300 provides ultrasonic waves to the bubble generator 200 to refine ozone bubbles contained in the washing water W1. By the ultrasonic generator 300, the primary bubble (B1) may be broken into small pieces, the split ozone bubble may be referred to as a secondary bubble (B2). The size of the secondary bubble B2 may be 900 nm or less. That is, the micro-sized primary bubble (B1) may be changed into the nano-sized secondary bubble (B2) by ultrasonic waves.

Referring to FIG. 2 , the ultrasonic generator 300 may be implemented in various forms. Referring to FIG. 2A , the ultrasonic generator 300 may be installed outside the bubble generator 200 . 2( b ) and 2 ( c ), the ultrasonic generator 300 may include a vibrator 310 immersed in the washing water W1 in the dissolution tank 210 . The vibrator 310 may be immersed in the washing water W1 and vibrate while providing ultrasonic waves to the washing water W1 and ozone bubbles (particularly, primary bubbles). The vibrator 310 of the ultrasonic generator 300 may be fully immersed as shown in FIG. 2(b), or may be partially (or fully) immersed in the water surface as in the probe type of FIG. 2(c). In addition, any form that can provide ultrasonic waves to the washing water W1 and ozone bubbles may be applied to the present invention.

However, the primary bubble (B1) and the secondary bubble (B2) are described as being sequentially formed for convenience, but by the simultaneous operation of the bubble generator 200 and the ultrasonic generator 300, ozone bubbles are nano-sized from the beginning. It may be formed of the secondary bubble (B2) of

In the washing water W1 inside the bubble generator 200, ozone bubbles having a size of 900 nm or less (secondary bubble B2) and ozone bubbles having a size of 100 μm or less (primary bubble B1) may be mixed. And, these ozone bubbles may be moved into the scrubber 100 together with the washing water W1. On the other hand, preferably ozone bubbles included in the washing water W1 may be mostly ozone bubbles (secondary bubbles B2) having a size of 900 nm or less. According to these ultrafine ozone bubbles, the contact rate with the exhaust gas G1 is increased, so that the cleaning power can be improved.

The washing water W1 including ozone bubbles may be supplied into the scrubber 100 through the supply line L. That is, the supply line L connects the bubbler 200 and the scrubber 100 , and in particular may be connected to the dissolution tank 210 of the bubbler 200 .

On the other hand, a plurality of nozzles are provided at the end of the supply line L, and the washing water W1 may be sprayed through the nozzles. The nozzle is located above the inlet of the exhaust gas (G1), so the washing water W1 containing ozone bubbles is introduced from the top of the scrubber 100, and in particular, the nozzle is the washing water ( W1) can be sprayed. Meanwhile, the exhaust gas G1 may be introduced from the lower portion of the scrubber 100 . Accordingly, the sprayed washing water W1 moves to the lower side of the scrubber 100 and comes into contact with the rising exhaust gas G1. The ozone bubble may react with the exhaust gas (G1) as it bursts.

In particular, nitrogen oxides may be dissolved in the washing water W1 after reacting with ozone. On the other hand, the sulfur oxide may be directly dissolved in the washing water W1 without reacting with ozone.

The scope of protection of the present invention is not limited to the description and expression of the embodiments explicitly described above. In addition, it is added once again that the scope of protection of the present invention may not be limited due to obvious changes or substitutions in the technical field to which the present invention pertains.

100: scrubber
110: exhaust gas inlet (inlet pipe)
120: gas outlet (discharge pipe)
200: bubble generator
210: dissolution tank
220: ozone generator
300: ultrasonic generator
310: vibrator
B1: primary bubble
B2: secondary bubble

Claims (5)

a scrubber installed on the ship to receive the exhaust gas discharged from the engine of the ship;
a bubble generator that receives the washing water and forms ozone bubbles in the washing water;
an ultrasonic generator for providing ultrasonic waves to the bubble generator so that ozone bubbles are miniaturized; and
and a supply line for supplying the washing water containing ozone bubbles from the bubbler to the inside of the scrubber,
The bubble generator,
a dissolution tank containing washing water; and
Including an ozone supplier for supplying ozone to the dissolution tank,
The ultrasonic generator includes a vibrator immersed in the washing water in the dissolution tank,
The ozone supplier,
an ozone generator for generating ozone; and
and an ozone pressurizing unit for moving ozone to the dissolution tank,
The exhaust gas flows into the lower part of the scrubber and moves upward,
The washing water containing ozone bubbles is introduced from the upper side of the exhaust gas and moves to the lower side,
an exhaust gas line connecting the engine of the ship and the lower part of the scrubber;
a discharge line formed in the scrubber to discharge the waste washing water collected at the bottom of the scrubber;
a line branching from the discharge line to move the waste washing water to the dissolution tank; and
Further comprising a seawater line for moving seawater from the sea to the dissolution tank by a pump,
An exhaust gas treatment device using ozone bubbles. delete delete delete delete

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