KR20220135295A - CO2 Reduction Equipment Using Scrubber For Ship - Google Patents

Abstract

Disclosed is a carbon dioxide reducing device using a desulfurizing scrubber for a ship. The carbon dioxide reducing device using a desulfurizing scrubber for a ship according to an embodiment of the present invention, which is a device installed on a fore-end of a desulfurizing scrubber for a ship to treat exhaust gas discharged from an engine, comprises: a reaction part for converting carbon dioxide of discharged exhaust gas; an injection part for supplying a sodium hydroxide solution to the reaction part while storing the solution; and a control part for measuring the carbon dioxide concentration of the exhaust gas discharged upward through the scrubber after being treated in the reaction part, and controlling the injection part depending on the measurement value. According to the carbon dioxide reducing device using a desulfurizing scrubber for a ship according to the present invention, carbon dioxide contained in exhaust gas discharged from an engine for a ship is neutralized using a sodium hydroxide solution to be converted into an intermediate material having high solubility in seawater, and the intermediate material is dissolved through final seawater to be discharged, thereby significantly reducing the amount of carbon dioxide discharged. Therefore, the carbon dioxide emission standards regulated by the International Maritime Organization can be satisfied without a large increase in equipment costs.

Description

CO2 Reduction Equipment Using Scrubber For Ship

The present invention relates to a carbon dioxide reduction device, and more particularly, to a carbon dioxide reduction device using a desulfurization scrubber for a ship.

Exhaust gases emitted from transportation means such as automobiles and ships, as well as chemical plants, are toxic, explosive and corrosive. Accordingly, the exhaust gas must be subjected to a purification process for reducing 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.

내지 800

의 고온에서 분해시켜 배기 가스를 처리하는 방식이고, 습식 방식은 주로 수용성 가스를 물에 통과시켜 용해되게 함으로써 배기 가스를 처리하는 방식이며, 흡착 방식은 발화되지 않거나 물에 녹지 않는 유해성 가스를 흡착제에 통과시켜 물리적 또는 화학적인 흡착에 의하여 정화되게 하는 방식이다.Methods for treating various harmful exhaust gases include a burning method, a wet method, an absorption method, and the like. In the combustion method, about 500 flammable gases containing mainly hydrogen gas are used in a high-temperature combustion chamber.

to 800

is a method of treating exhaust gas by decomposing it at a high temperature of It is a method to pass through and purify by physical or chemical adsorption.

The International Maritime Organization regulates the emission of sulfur oxides from internal combustion engines of ships, and many ships install desulfurization scrubbers to reduce sulfur oxide emissions, so they use low-priced high-sulfur oil while using sulfur oxides. It satisfies emission regulations. These scrubbers reduce the amount of sulfur oxides discharged into the atmosphere by dissolving sulfur oxides by spraying seawater.

On the other hand, according to the regulations of the International Maritime Organization, ships on international voyages must reduce the amount of carbon dioxide as well as sulfur oxide emissions by 40% by 2030 and 70% by 2050. This regulation is called the Energy Efficiency Existing Ship Index (EEXI) of existing ships.

Reducing carbon dioxide emissions from ships is a very difficult technology. A realistically possible method is to reduce the engine output or use an eco-friendly fuel such as LNG for fuel, which is a method that is practically difficult for ship owners. Therefore, in order to reduce carbon dioxide emissions, only indirect methods of reducing fuel consumption have been devised.

The carbon dioxide capture (CCS) technology used on land is being installed on a trial basis only in large-scale factories that emit large amounts of carbon dioxide due to the large scale of the facility and too much energy used. That is, there is no technology suitable for capturing carbon dioxide contained in exhaust gas generated from ships.

Accordingly, there is a need for a technique capable of solving the above-mentioned problems according to the prior art.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a carbon dioxide reduction device for ships that reduces carbon dioxide emissions from a ship engine without reducing the output of the engine during operation of the existing ship and changing the used fuel into an eco-friendly fuel.

A carbon dioxide reduction device using a marine desulfurization scrubber according to an aspect of the present invention for achieving this object is installed in front of the marine desulfurization scrubber to process the exhaust gas emitted from the engine, and converts carbon dioxide in the exhaust gas and an injection unit for supplying the reaction unit while storing the sodium hydroxide solution; and the injection unit according to the value by measuring the carbon dioxide concentration of the exhaust gas discharged through the scrubber after being treated in the reaction unit It may be a configuration including; a control unit to control.

In an embodiment of the present invention, the reaction unit may be installed at the inlet of the desulfurization scrubber, and may be formed in a structure in which liquid sodium hydroxide is sprayed as a mist by a nozzle into the exhaust gas passing at high speed.

In addition, the injection unit may include a storage tank for storing the sodium hydroxide solution, and a pump for supplying the stored sodium hydroxide solution by pressurizing the stored sodium hydroxide solution to the reaction unit.

In one embodiment of the present invention, the control unit, a measuring sensor for measuring the carbon dioxide concentration of the exhaust gas discharged through the desulfurization scrubber, a measuring device that receives the signal of the measuring sensor to calculate and display the result, and to the value Therefore, it may be configured as a pump controller that controls the pump of the injection unit.

In addition, an inlet pipe is formed so that the exhaust gas introduced into the reaction part is introduced obliquely along the wall surface from one side of the bottom surface of the reaction part, and the liquid sodium hydroxide injection nozzle is at an angle in a direction against the flow of exhaust gas from the side wall. It may have a sprayed structure.

As described above, according to the carbon dioxide reduction apparatus using the marine desulfurization scrubber of the present invention, in order to reduce the amount of carbon dioxide in the exhaust gas discharged from the marine engine, a sodium hydroxide solution is used in the front end of the desulfurization scrubber to react with carbon dioxide in the exhaust gas. After converting carbon dioxide into a highly soluble intermediate (Na ₂ CO ₃ ), the intermediate material is introduced into the desulfurization scrubber, and finally the desulfurization scrubber dissolves the intermediate material together with the sulfur oxide and discharges it to the atmosphere. It can dramatically reduce the carbon dioxide emitted.

1 is a schematic diagram of a device for reducing exhaust gas of a ship including a device for reducing carbon dioxide using a desulfurization scrubber for a ship of the present invention.
Figure 2 is a schematic diagram showing a carbon dioxide reduction device using a desulfurization scrubber for ships according to an embodiment of the present invention.
Figure 3 (a) is a front view of the reaction part, which is a configuration of the carbon dioxide reduction device using the present invention a ship desulfurization scrubber.
Figure 3 (b) is a bottom view of the reaction part, which is a configuration of the carbon dioxide reduction device using the present invention a ship desulfurization scrubber.
Figure 4 is a cross-sectional view taken along line AA of Figure 3 (a).

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. Prior to this, the terms or words used in the present specification and claims should not be construed as being limited to conventional or dictionary meanings, but should be interpreted as meanings and concepts consistent with the technical spirit of the present invention.

Throughout this specification, when a member is said to be located "on" another member, this includes not only a case in which a member is in contact with another member but also a case in which another member exists between two members. Throughout this specification, when a part "includes" a component, it means that other components may be further included, rather than excluding other components, unless otherwise stated.

1 is a schematic diagram of a device for reducing exhaust gas of a ship including a device for reducing carbon dioxide using a desulfurization scrubber for a ship of the present invention, and FIG. 2 is a schematic diagram showing a device for reducing carbon dioxide using a desulfurization scrubber for a ship according to an embodiment of the present invention. . Figure 3 (a) is a front view of the reaction part that is the configuration of the carbon dioxide reduction device using the ship desulfurization scrubber of the present invention, Figure 3 (b) is a bottom view of the reaction part, which is the configuration of the carbon dioxide reduction device using the ship desulfurization scrubber of the present invention, Figure 4 shows the structure viewed from above in the cross section A-A of Figure 3 (a).

Referring to Figure 1, the exhaust gas reduction device of the ship including the carbon dioxide reduction device using the desulfurization scrubber for the ship according to the present embodiment is a device for removing carbon dioxide contained in the exhaust gas discharged from the marine engine (1), It will be installed between the marine engine (1) and the desulfurization scrubber (2). Meanwhile, wastes such as sulfur oxides removed through the desulfurization scrubber 2 are finally treated through the wastewater treatment device 3 .

The carbon dioxide reduction device 100 used in the present invention, as shown in FIG. 2, introduces the exhaust gas discharged from the marine engine 1 and converts the carbon dioxide contained in the exhaust gas into an intermediate with high solubility. (10), the injection unit 20 supplying the sodium hydroxide solution to the reaction unit 10 while storing, and the carbon dioxide concentration of the exhaust gas discharged upward through the scrubber after being treated in the reaction unit 10 is configured to include a control unit 30 for controlling the injection unit 20 according to the measured value.

Of the above configuration, the reaction unit 10 is installed in front of the desulfurization scrubber 2, and liquid sodium hydroxide is sprayed into the exhaust gas flowing inside the reaction unit as a mist by a nozzle, and carbon dioxide contained in the exhaust gas reacts with the injected sodium hydroxide to be converted into sodium carbonate and water. Usually, sodium carbonate is water-soluble, so it is sent to the desulfurization scrubber 2, and is dissolved by seawater in the scrubber 2 and finally discharged to the sea in the form of sodium and carbonate or bicarbonate.

3 is a view showing a reaction unit 10, which is a configuration of the present invention, wherein the reaction unit 10 is an embodiment, and the reaction unit 10 is a cylindrical housing 13 and is located on one side of the bottom of the housing 13 to the inlet pipe 11 through which exhaust gas is introduced from the marine engine, the exhaust gas outlet pipe 14 located on the upper surface of the housing, and a plurality of injection nozzles 15 for spraying the liquid sodium hydroxide solution toward the inside of the housing. is composed The ends of the inlet pipe 11 and the outlet pipe 14 are preferably formed of a flange to which an exhaust gas pipe can be connected. Here, sodium hydroxide is described as an example of a strong basic material, and a strong basic material other than sodium hydroxide solution may be used, but there may be differences in performance depending on the material used at this time.

The injection unit 20 is composed of a storage tank 22 for storing the sodium hydroxide solution, and a pump 22 for supplying the stored sodium hydroxide solution by pressurizing it to the injection nozzle 15 of the reaction unit 10 . can

In addition, the control unit 30, the measurement sensor 31 for measuring the carbon dioxide concentration of the exhaust gas discharged through the desulfurization scrubber 2, and receives the signal from the measurement sensor 31 to calculate and display the result It may be composed of a meter 32 and a pump controller 33 that controls the pump 21 of the injection unit 20 according to the value.

Here, it is preferable that the measurement sensor 31 is installed at the rear end of the desulfurization scrubber 2 to measure the carbon dioxide concentration of the exhaust gas after passing through the desulfurization scrubber 2 . As an example, the pump controller 33 sends a control signal to the pump 21 of the injection unit 20 when there is a possibility that the carbon dioxide concentration measured by the measurement sensor 31 increases and the discharge amount exceeds the IMO standard. By controlling the operation of the pump 21, it is controlled to increase the amount of sodium hydroxide injected.

On the other hand, the inside of the housing 13 of the reaction unit 10 constitutes a reaction space in which the sodium hydroxide solution in the mist state sprayed by the plurality of injection nozzles 15 and the exhaust gas can be mixed. At this time, it is necessary to sufficiently react the carbon dioxide in the exhaust gas and the injected sodium hydroxide solution.

The inside of the reaction unit 10 preferably flows in the form of a whirlpool when the exhaust gas is introduced through the inlet pipe 11 of the housing 13 so as to secure a reaction time. To this end, it is necessary to introduce the introduction tube 11 obliquely along the wall surface from one side of the bottom surface of the reaction unit 10 as shown in FIG. 3(b). The exhaust gas introduced into the housing 13 in this way flows while forming a tornado flow along the inner wall of the housing 13, and the injection nozzle 15 injected from the side of the housing 13 flows along the wall as shown in FIG. It is preferable to install it so that it is injected at a certain angle in a direction that opposes the exhaust gas tornado flow. If necessary, the injection nozzle 15 may also be installed on the bottom and top surfaces of the housing 13 . In this case, the injection angle of the injection nozzle is preferably installed in a direction perpendicular to the upper surface and the bottom surface where the injection nozzle is installed.

Hereinafter, the operation of the carbon dioxide reduction device 100 using the desulfurization scrubber for ships according to the present embodiment will be described in detail with reference to FIGS. 1 to 4 .

In order to reduce the amount of carbon dioxide included in the exhaust gas discharged from the ship, the exhaust gas discharged from the marine engine 1 is introduced through the introduction pipe 11 of the reaction unit 10 of the carbon dioxide reduction device 100 . The incoming exhaust gas forms a tornado flow along the inner wall of the housing 13 of the reaction unit 10 , and at this time, the solution stored in the sodium hydroxide tank 22 through the injection unit 20 operates the pump 21 . Through the reaction unit 10, it is injected into the housing 13 by the injection nozzle 15. At this time, the direction of the injection nozzle 15 is injected in a direction opposite to the swirl flow direction of the exhaust gas. The sprayed mist-state strongly basic sodium hydroxide solution neutralizes the acidic carbon dioxide in the exhaust gas to produce sodium carbonate, which is easily soluble in seawater. The sodium carbonate solution thus generated is sent to the desulfurization scrubber 2 together with the exhaust gas, dissolved by the seawater sprayed therein, and finally discharged to the sea.

In this process, the control unit 30 measures the concentration of carbon dioxide in the exhaust gas discharged after the desulfurization scrubber 2 treatment using the measuring sensor 31, and the measured value analyzed by the measuring device 32 is a preset value. When there is a possibility that the carbon dioxide concentration becomes higher than the IMO standard and the discharge amount exceeds the IMO standard, a control signal is sent to the pump 21 of the injection unit 20 to control the operation of the pump 21 to increase the amount of sodium hydroxide injected control to make it happen.

As described above, according to the carbon dioxide reduction device using the marine desulfurization scrubber of the present invention, the carbon dioxide contained in the exhaust gas discharged from the marine engine is neutralized using sodium hydroxide solution to convert it into an intermediate material with high solubility in seawater, , there is an effect that can significantly lower the amount of carbon dioxide emitted by dissolving this intermediate material through the final seawater and discharging it. Therefore, it has the advantage of being able to satisfy the carbon dioxide emission standards regulated by the International Maritime Organization without a significant increase in facility cost.

In addition, according to the present invention, by increasing the reaction time with the sodium hydroxide solution by increasing the residence time of the exhaust gas in the reaction unit 10 as much as possible, the carbon dioxide removal effect can be maximized, and as a result, the carbon dioxide emission with only a compact structure It has the advantage of greatly reducing the

In the above detailed description of the present invention, only specific embodiments thereof have been described. However, it is to be understood that the present invention is not limited to the particular form recited in the detailed description, but rather, it is to be understood to cover all modifications and equivalents and substitutions falling within the spirit and scope of the invention as defined by the appended claims. should be

1: Marine engine
2: Desulfurization scrubber
3: Wastewater treatment equipment
100: carbon dioxide reduction device
10: reaction part
11: inlet pipe 13: housing 14: outlet pipe 15: spray nozzle
20: injection unit
21: pump 22: sodium hydroxide tank
30: control unit
31: measuring sensor 32: measuring instrument 33: pump controller

Claims (5)

As a device installed in front of the desulfurization scrubber for ships to treat the exhaust gas emitted from the engine,
a reaction unit for converting carbon dioxide in the exhaust gas; and
An injection unit for supplying the sodium hydroxide solution to the reaction unit while keeping it; and
A control unit that measures the carbon dioxide concentration of the exhaust gas discharged upward through the scrubber after being treated in the reaction unit and controls the injection unit according to the value;
A carbon dioxide reduction device using a desulfurization scrubber for ships configured to include. 2. The method of claim 1,
The reaction unit,
Installed at the inlet of the desulfurization scrubber, a carbon dioxide reduction device using a desulfurization scrubber for ships, characterized in that the liquid sodium hydroxide is sprayed as a mist by a nozzle to the exhaust gas passing at high speed. 2. The method of claim 1,
The injection unit,
A carbon dioxide reduction device using a desulfurization scrubber for ships, characterized in that it consists of a storage tank for storing the sodium hydroxide solution, and a pump for supplying the stored sodium hydroxide solution by pressurizing the reaction unit. 2. The method of claim 1,
The control unit is
A measuring sensor that measures the carbon dioxide concentration of exhaust gas discharged through the desulfurization scrubber, a measuring device that receives the signal of the measuring sensor and displays the calculation result, and a pump controller that controls the pump of the injection unit according to the value Carbon dioxide reduction device using a desulfurization scrubber for ships, characterized in that. 3. The method of claim 2,
The exhaust gas introduced into the reaction unit is formed with an introduction pipe so as to be introduced obliquely along the wall surface from one side of the bottom surface of the reaction unit, and the liquid sodium hydroxide injection nozzle is injected at an angle from the side wall in a direction against the flow of the exhaust gas. Carbon dioxide reduction device using a desulfurization scrubber for ships, characterized in that.

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