KR102639997B1 - Film plating device - Google Patents

Abstract

The marine plasma nitrogen oxide reduction system according to embodiments of the present invention includes a dust removal unit that sucks the exhaust gas of a ship engine and removes dust in the exhaust gas, and a dust removal unit that measures the dust concentration of the exhaust gas that has passed through the dust removal unit. A dust concentration measuring unit, a plasma removal unit where the exhaust gas passing through the dust concentration measuring unit flows in and removes nitrogen oxides through plasma, and a dust concentration measuring unit connected to the front of the dust removal unit, the dust removal unit It includes a dust circulation unit selectively communicating with the front of the dust removal unit, a dust removal main body forming the exterior, and a dust filter removal unit disposed in front of the dust removal main unit and having a plurality of filters disposed to remove dust. , a dust spray removal unit disposed behind the dust filter removal unit and removing dust by spraying a liquid, and a dust electric removal unit disposed behind the dust spray removal unit and removing dust through static electricity, The dust filter removal unit may have a mesh size of the filter that decreases from the front to the back. As a result, the removal efficiency of nitrogen oxides can be improved by removing as much dust as possible before removing nitrogen oxides.

Description

Plasma nitrogen oxide reduction system for ships {Film plating device}

The present invention relates to a plasma nitrogen oxide reduction system for ships.

In recent years, as interest in the environment has increased, regulations on exhaust gases emitted from vehicles and ships are being strengthened day by day. In particular, as regulations on nitrogen oxides among substances contained in exhaust gas are strengthened, interest in systems that can reduce nitrogen oxides is increasing.

Representative methods for reducing nitrogen oxides include selective catalytic reduction and selective non-catalytic reduction. Selective Catalytic Reduction (SCR) is a method of reducing nitrogen oxides by supplying ammonia, a reducing agent, through an ammonia injection facility (AIG) downstream of the combustion device to cause a reduction reaction in the catalytic reaction tower.

Selective Non-Catalytic Reduction (SNCR) is a technology that directly injects ammonia water or urea water into the combustion device and reacts with nitrogen oxides generated through combustion of fossil fuels in the combustion device to reduce them.

However, as mentioned above, as regulations on the concentration of nitrogen oxides in exhaust gas are strengthened, research is being actively conducted on methods to reduce nitrogen oxides more efficiently.

Additionally, in order to improve the efficiency of nitrogen oxide removal, research is being actively conducted on a nitrogen oxide removal system that can remove as much dust contained in the exhaust gas as possible before removing nitrogen oxides.

Korean Patent No. 10-1591229

Embodiments of the present invention seek to provide a plasma nitrogen oxide reduction system for ships that can maximize nitrogen oxide removal efficiency by minimizing dust contained in exhaust gas before nitrogen oxide removal.

In addition, embodiments of the present invention seek to provide a plasma nitrogen oxide reduction system for ships that can repeatedly remove dust if it is not removed below a certain concentration and set the concentration of dust below a certain concentration before removing nitrogen oxides.

In addition, embodiments of the present invention seek to provide a plasma nitrogen oxide reduction system for ships that can minimize nitrogen oxides contained in exhaust gas by repeatedly removing nitrogen oxides multiple times until the concentration of nitrogen oxides is maintained below a certain level. do.

According to the present embodiments, the marine plasma nitrogen oxide reduction system measures the dust concentration through the dust concentration measuring unit and can continuously remove dust through the dust circulation unit when the dust concentration is higher than the standard.

Specifically, a dust removal unit that sucks in the exhaust gas of a ship engine and removes dust in the exhaust gas, a dust concentration measuring unit that measures the dust concentration of the exhaust gas that has passed through the dust removal unit, and a dust concentration measuring unit that measures the dust concentration of the exhaust gas that has passed through the dust concentration measuring unit. It may include a plasma removal unit through which the exhaust gas flows in and removes nitrogen oxides through plasma, and a dust circulation unit connecting the dust concentration measurement unit and the front of the dust removal unit and selectively communicating with the front of the dust removal unit. You can.

The dust removal unit includes a dust removal main body forming the exterior, a dust removal main body disposed in front of the dust removal main body, a dust filter removal unit in which a plurality of filters are arranged to remove dust, and a dust filter removal unit disposed behind the dust filter removal unit, and liquid It includes a dust spray removal unit that removes dust by spraying and a dust electric removal unit that is disposed at the rear of the dust spray removal unit and removes dust through static electricity, and the dust filter removal unit has a mesh of the filter as it moves from the front to the back. The size may be reduced.

In addition, the dust circulation unit connects the dust concentration measuring unit and the dust removal unit, and is provided inside the dust circulation main body and a dust circulation main unit that provides a path through which the exhaust gas flows, and a plurality of filters are disposed. It includes a dust circulation filter unit that removes dust from the exhaust gas, wherein the dust circulation filter unit has a mesh size of the filter that decreases from the rear to the front, and the mesh size of the filter disposed at the rearmost part of the dust circulation filter unit is such that the dust circulation filter unit has a mesh size of the filter that removes dust from the exhaust gas. The mesh size of the filter placed at the rear of the filter removal unit may be smaller than that of the filter.

In addition, the plasma removal part forms an exterior, a plasma main part into which the exhaust gas passing through the dust concentration measuring part flows, a plasma element part that supplies urea water so that the urea water is injected into the plasma main part, and a plasma main part into the plasma main part. It may include a plasma inducing part that induces generation and a plasma expansion part provided inside the plasma main part to expand the plasma generated by the plasma inducing part.

The plasma induction unit includes a plasma steam supply unit that supplies steam, a plasma torch unit connected to the plasma steam supply unit, a plasma fuel supply unit that is spaced apart from the plasma steam supply unit and the plasma torch unit and supplies fuel, the plasma steam supply unit, and the plasma induction unit. It includes a plasma generating unit connected to the plasma torch unit and the plasma fuel supply unit, and a plasma spraying unit provided at a rear end of the plasma generating unit to spray plasma, wherein the plasma spraying unit is inclined so that the cross-sectional area increases from the front to the rear, The plasma expansion portion may be arranged to face the plasma spray portion.

In addition, a front concentration measuring unit disposed behind the plasma removal unit and measuring the concentration of nitrogen oxides in the exhaust gas passing through the plasma removal unit, and a front concentration measuring unit that selectively communicates with one side of the front concentration measuring unit and the plasma removal unit. It further includes a front circulation unit, and when the concentration of nitrogen oxides measured by the front concentration measuring unit is higher than the first concentration, the exhaust gas can be guided to the plasma removal unit through the front circulation unit.

In addition, it further includes a selective non-catalytic reduction and removal unit disposed behind the front concentration measuring unit, wherein the selective non-catalytic reduction and removal unit injects ammonia into the exhaust gas and removes nitrogen oxides at a predetermined temperature, and the predetermined temperature is 900 It can be set between degrees and 1000 degrees.

In addition, a central concentration measuring unit disposed behind the selective non-catalytic reduction and removal unit to measure the nitrogen oxide concentration of the exhaust gas passing through the selective non-catalytic reduction and removal unit, and a central concentration measuring unit disposed on one side of the central concentration measuring unit to measure the concentration of nitrogen oxides in the exhaust gas passing through the selective non-catalytic reduction and removal unit, and a central circulation unit connected to the selective non-catalytic reduction and removal unit and selectively communicating with each of the front circulation unit and the selective non-catalytic reduction and removal unit, wherein the concentration of nitrogen oxide measured by the central concentration measuring unit is the second concentration. In the case of the above, the exhaust gas can be guided to the selective non-catalytic reduction and removal unit through the central circulation unit.

In addition, when the concentration of nitrogen oxides measured by the central concentration measuring unit is higher than the third concentration, the exhaust gas is guided to the front circulation unit and the selective non-catalytic reduction and removal unit through the central circulation unit, and the exhaust gas measured by the central concentration measuring unit is guided to the front circulation unit and the selective non-catalytic reduction and removal unit. When the concentration of nitrogen oxides is higher than the fourth concentration, the exhaust gas can be guided to the front circulation section through the central circulation section.

In addition, a selective catalytic reduction and removal unit disposed behind the central concentration measuring unit and a rear concentration measuring unit disposed behind the selective catalytic reduction and removal unit and measuring the concentration of nitrogen oxides in the exhaust gas passing through the selective catalytic reduction and removal unit. More may be included.

Embodiments of the present invention can provide a plasma nitrogen oxide reduction system for ships that can maximize nitrogen oxide removal efficiency by minimizing dust contained in exhaust gas before nitrogen oxide removal.

In addition, embodiments of the present invention can provide a plasma nitrogen oxide reduction system for ships that can repeatedly remove dust if it is not removed below a certain concentration and set the concentration of dust below a certain concentration before removing nitrogen oxides.

In addition, embodiments of the present invention provide a plasma nitrogen oxide reduction system for ships that can minimize nitrogen oxides contained in exhaust gas by repeatedly removing nitrogen oxides multiple times until the concentration of nitrogen oxides is maintained below a certain level. You can.

Figure 1 is a schematic diagram of a plasma nitrogen oxide reduction system for ships according to an embodiment of the present invention.
Figure 2 is a flowchart of a plasma nitrogen oxide reduction system for ships according to an embodiment of the present invention.
Figure 3 is a diagram showing a dust filter removal unit according to an embodiment of the present invention.
Figure 4 is a diagram showing a plasma removal unit in one embodiment of the present invention.

Below, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention.

However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. In order to clearly explain the present invention in the drawings, parts unrelated to the description are omitted, and similar parts are given similar reference numerals throughout the specification.

In this specification, duplicate descriptions of the same components are omitted.

Also, in this specification, when a component is mentioned as being 'connected' or 'connected' to another component, it may be directly connected or connected to the other component, but may be connected to the other component in the middle. It should be understood that may exist. On the other hand, in this specification, when it is mentioned that a component is 'directly connected' or 'directly connected' to another component, it should be understood that there are no other components in between.

Additionally, the terms used in this specification are merely used to describe specific embodiments and are not intended to limit the present invention.

Also, in this specification, singular expressions may include plural expressions, unless the context clearly dictates otherwise.

In addition, in this specification, terms such as 'include' or 'have' are only intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and one or more It should be understood that this does not exclude in advance the presence or addition of other features, numbers, steps, operations, components, parts, or combinations thereof.

Also, in this specification, the term 'and/or' includes a combination of a plurality of listed items or any of the plurality of listed items. In this specification, 'A or B' may include 'A', 'B', or 'both A and B'.

Figure 1 is a schematic diagram of a plasma nitrogen oxide reduction system for ships according to an embodiment of the present invention. Figure 2 is a flowchart of a plasma nitrogen oxide reduction system for ships according to an embodiment of the present invention. Figure 3 is a diagram showing a dust filter removal unit according to an embodiment of the present invention.

1 to 3, the marine plasma nitrogen oxide reduction system (S) according to an embodiment of the present invention includes a dust removal unit (1), a dust concentration measurement unit (2), a plasma removal unit (3), and a dust removal unit (3). It may include a circulation unit (4).

The dust removal unit 1 can suck in exhaust gas from a ship engine and remove dust in the exhaust gas. That is, the dust removal unit 1 can effectively remove nitrogen oxides by removing dust before removing nitrogen oxides from the exhaust gas discharged from the ship engine.

The dust concentration measuring unit (2) can measure the dust concentration of the exhaust gas that has passed through the dust removal unit (1). That is, the dust concentration measuring unit 2 can measure whether the dust concentration in the exhaust gas passing through the dust removal unit 1 satisfies the minimum dust concentration at which nitrogen oxides can be effectively removed.

The plasma removal unit 3 can remove nitrogen oxides through plasma when the exhaust gas that has passed through the dust concentration measurement unit 2 is introduced. That is, the plasma removal unit 3 can burn and decompose nitrogen oxides in the exhaust gas by adding a reducing agent and plasma to the exhaust gas. The reducing agent may be urea, ammonia, or urea (CO(NH2)2), and nitrogen oxides in the exhaust gas may be decomposed into water, carbon dioxide, and nitrogen by the reducing agent and plasma.

The dust circulation unit 4 connects the dust concentration measuring unit 2 and the front of the dust removal unit 1, and can be selectively communicated with the front of the dust removal unit 1. That is, the dust circulation unit (4) selectively communicates with the front of the dust removal unit (1) when the dust concentration of the exhaust gas measured by the dust concentration measuring unit (2) is above a predetermined concentration, and returns the exhaust gas to the dust removal unit ( You can guide the user to 1) so that the dust can be removed again.

The predetermined concentration is the minimum concentration at which nitrogen oxides emitted from the exhaust gas of a ship engine can be effectively removed and can be determined by theoretical or experimental values. Additionally, the front of the dust removal unit 1 may be the front of the dust removal unit 1 itself or a flow path connected to the dust removal unit 1 through which exhaust gas is introduced.

In other words, the dust concentration measuring unit (2) and the dust circulation unit (4) interact to remove dust in the exhaust gas so that nitrogen oxides can be removed under optimal conditions before the exhaust gas is guided to the plasma removal unit (3). It can be removed.

In addition, even if the dust removal unit (1) is repeatedly applied five or more times, the marine plasma nitrogen oxide reduction system (S) can be stopped if the concentration value measured by the dust concentration measurement unit (2) is higher than a predetermined concentration. In other words, if there is a possibility that the dust concentration measuring unit 2 is broken, the operation of the marine plasma nitrogen oxide reduction system (S) can be stopped and the user can be notified so that action can be taken.

Meanwhile, the dust removal unit 1 may include a dust removal main body 11, a dust filter removal unit 13, a dust spray removal unit 15, and a dust electric removal unit 17. The dust removal body portion 11 may form an exterior appearance.

That is, the dust removal main body 11 has a space formed inside so that exhaust gas can pass through, and the dust filter removal unit 13, dust spray removal unit 15, and dust electric removal unit 17 are provided therein. can be placed.

The dust filter removal unit 13 is disposed in front of the dust removal main body 11, and a plurality of filters are disposed to remove dust. That is, the dust filter removal unit 13 can remove dust from the exhaust gas through filtering, and the filtering effect can be maximized by placing a plurality of filters spaced apart.

Additionally, the mesh size of the dust filter removal unit 13 may decrease from the front to the back. That is, the dust filter removal unit 13 can effectively remove dust by having a plurality of filters of complex sizes.

Specifically, the dust filter removal unit 13 may include a front dust filter 131, a central dust filter 133, and a rear dust filter 135. The front dust filter 131 is disposed in front of the dust removal main body 11, the central dust filter 133 is disposed behind the front dust filter 131, and the rear dust filter 135 is a central dust filter ( 133) can be placed at the rear.

In addition, the mesh size of the central dust filter 133 may be smaller than that of the front dust filter 131, and the mesh size of the rear dust filter 135 may be smaller than the mesh size of the central dust filter 133. there is.

Specifically, the length (D2) of one side of the mesh of the central dust filter (133) may be 0.85 to 0.95 of the length (D1) of one side of the mesh of the front dust filter (131), and the length of one side of the mesh of the rear dust filter (135) may be 0.85 to 0.95. (D3) may be 0.85 to 0.95 of the length (D2) of one side of the mesh of the central dust filter (133). Accordingly, the exhaust gas moves from the front to the rear, and dust of different sizes present inside can be effectively removed.

More specifically, the length (D2) of one side of the mesh of the central dust filter (133) may be 0.895 to 0.905 of the length (D1) of one side of the mesh of the front dust filter (131), and the length (D2) of one side of the mesh of the rear dust filter (135) may be 0.895 to 0.905. The length D3 may be 0.895 to 0.905 of the length D2 of one side of the mesh of the central dust filter 133. Accordingly, the exhaust gas moves from the front to the rear, and dust of different sizes present inside can be more effectively removed.

The dust spray removal unit 15 is disposed behind the dust filter removal unit 13 and can remove dust by spraying liquid. That is, the dust spray removal unit 15 sprays liquid on the dust in the exhaust gas that has not been removed by the dust filter removal unit 13 and has passed through, thereby effectively removing dust regardless of the size of the dust. The liquid may be water or alcohol to remove dust.

Specifically, the dust spray removal unit 15 may include a dust liquid spray unit 151 and a dust liquid drain unit 153. The dust liquid spray unit 151 is provided on the upper part of the main body of the dust spray removal unit 15 and can remove dust by spraying liquid downward. The dust liquid drain unit 153 is equipped with a pump so that the sprayed liquid can be collected and discharged to the outside.

The dust electric removal unit 17 is disposed behind the dust spray removal unit 15 and can remove dust through static electricity. That is, the dust electric removal unit 17 generates static electricity in the dust in the exhaust gas that has not been removed by the dust spray removal unit 15 and passes through it, thereby effectively removing dust regardless of the size of the dust. Specifically, the dust and electricity removal unit 17 is equipped with static electricity generating devices at both ends of the main body to generate static electricity, and the generated static electricity can remove dust.

In summary, the dust removal unit (1) combines physical removal of dust through the dust filter removal unit (13), chemical removal through the dust spray removal unit (15), and electrical removal through the electrical dust removal unit (17). By performing this, dust contained in the exhaust gas can be minimized, and nitrogen oxides can be effectively removed by the plasma removal unit (3).

In addition, the dust filter removal unit (13), the dust spray removal unit (15), and the dust electric removal unit (17) are arranged in that order from the front to the rear, ensuring economic efficiency by minimizing power consumption and liquid consumption required for dust removal. You can.

Meanwhile, the dust circulation unit 4 may include a dust circulation main body 41 and a dust circulation filter unit 43. The dust circulation body unit 41 connects the dust concentration measuring unit 2 and the dust removal unit 1 and can provide a path through which exhaust gas flows.

That is, the dust circulation main body 41 can communicate with the dust removal unit 1 only when the dust concentration measured by the dust concentration measuring unit 2 is above a predetermined concentration. The dust circulation main body 41 may be provided with a valve to selectively communicate with the dust removal unit 1.

The dust circulation filter unit 43 is disposed inside the dust circulation main body unit 41 and is provided with a plurality of filters to remove dust from the exhaust gas. That is, the dust circulation filter unit 43 can improve dust removal efficiency by removing dust during the process of being guided to the dust removal unit 1.

Specifically, the mesh size of the filter of the dust circulation filter unit 43 decreases from the rear to the front, and the mesh size of the filter disposed at the rearmost part of the dust circulation filter unit 43 is that of the dust filter removal unit 13. It may be provided with a mesh size smaller than that of the filter placed at the rear.

That is, the maximum mesh size of the dust circulation filter unit 43 may be smaller than the minimum mesh size of the dust filter removal unit 13, so that exhaust gas can flow and dust can be effectively removed.

More specifically, the dust circulation filter unit 43 can be arranged in three bundles at the rear, center, and front, and the dust circulation filter unit 43 disposed at the rear has all three bundle filters of the same mesh size. You can have

In addition, the dust circulation filter unit 43 disposed in the center has three bundled filters all having the same mesh size, and may have a smaller size than the filter disposed at the rearmost part. In addition, the dust circulation filter unit 43 disposed at the forefront has three bundled filters all having the same mesh size, and may have a smaller size than the filter disposed in the center.

In addition, the dust circulation filter unit 43 may be provided so that the length of one side of the bundled filter disposed at the rear is 0.9 of the length D3 of the rear dust filter 135, and the length of one side of the bundled filter disposed at the center is 0.9 of the length D3 of the rear dust filter 135. It may be provided to be 0.9 of the length of one side of the bundled filter disposed at the rear, and the length of one side of the bundled filter disposed at the forefront may be 0.9 of the length of one side of the bundled filter disposed at the center. Accordingly, dust can be removed more effectively.

Figure 4 is a diagram showing a plasma removal unit in one embodiment of the present invention. Referring to FIG. 4, the plasma removal unit 3 according to an embodiment of the present invention includes a plasma body unit 31, a plasma inlet unit 32, a plasma element unit 33, a plasma induction unit 35, and a plasma expansion unit. It may include part 37.

The plasma body portion 31 forms an exterior, and exhaust gas passing through the dust concentration measuring portion 2 can flow into the plasma body portion 31 . That is, the plasma main body 31 can provide a space for exhaust gas to flow therein and be decomposed and continued by plasma. The plasma inlet 32 is provided on one side of the plasma main body 31 through which exhaust gas can flow.

The plasma element unit 33 can supply urea water so that the urea water is injected into the plasma main body 31. That is, the plasma element part 33 is spaced apart from the plasma inlet part 32, so that urea water, which acts as a reducing agent during decomposition and combustion of nitrogen oxides, can be injected into the plasma main part 31.

Specifically, the plasma element unit 33 may include a plasma element body unit 331 and a plasma element filter unit 333. The plasma element body portion 331 forms an exterior and allows urea water to flow inside, and the plasma element filter portion 333 can improve nitrogen oxide removal efficiency by removing impurities from the urea water. The mesh size of the plasma element filter unit 333 may be three times that of the rear dust filter 135.

The plasma inducing unit 35 can induce plasma generation into the plasma main unit 31. That is, the plasma inducing part 35 is provided in the plasma main part 31 and is spaced apart from the plasma inlet part 32 and the plasma element part 33 to generate plasma in the center of the plasma main part 31 to produce nitrogen oxide. can be easily removed.

The plasma expansion unit 37 is provided inside the plasma main unit 31 and can expand the plasma generated by the plasma induction unit 35. That is, the plasma expansion portion 37 is connected to the plasma inducing portion 35 and is inclined so that the cross-sectional area increases as the distance from the plasma inducing portion 35 increases, thereby increasing the plasma and improving the removal efficiency of nitrogen oxides. Additionally, the plasma expansion part 37 may be arranged to face the plasma induction part 35.

Additionally, the plasma removal unit 3 may include a plasma auxiliary unit 39. The plasma auxiliary unit 39 can prevent excessive generation by preventing the plasma from expanding beyond a certain level.

Specifically, the plasma auxiliary unit 39 may include a plasma passage unit 391 and a plasma power unit 393. The plasma power unit 393 can generate wind toward the plasma passage unit 391, and the plasma passage unit 391 allows the wind generated through the plasma power unit 393 to pass through and expand the plasma beyond a certain level. By doing so, you can prevent unexpected accidents. In addition, the plasma power unit 393 is disposed at a predetermined distance from the plasma passage unit 391 to prevent damage due to exposure of the plasma to the outside.

Specifically, the plasma induction unit 35 may include a plasma steam supply unit 351, a plasma torch unit 353, a plasma fuel supply unit 355, a plasma generation unit 357, and a plasma injection unit 359. The plasma steam supply unit 351 can supply steam, and the plasma torch unit 353 is connected to the plasma steam supply unit 351 to provide an ignition source for plasma generation.

The plasma fuel supply unit 355 can supply fuel by being spaced apart from the plasma steam supply unit 351 and the plasma torch unit 353. That is, the plasma fuel supply unit 355 can be spaced apart from the laminated plasma steam supply unit 351 and the plasma torch unit 353 to supply fuel for plasma generation.

The plasma generating unit 357 may be connected to a plasma steam supply unit 351, a plasma torch unit 353, and a plasma fuel supply unit 355. That is, the plasma generating unit 357 may be connected to a plasma steam supply unit 351 and a plasma torch unit 353 that are laminated on one side, and a plasma fuel supply unit 355 may be connected to the other side.

Additionally, the plasma generation unit 357 may provide a space in which plasma can be generated by the plasma steam supply unit 351, the plasma torch unit 353, and the plasma fuel supply unit 355.

The plasma injection unit 359 is provided at the rear end of the plasma generation unit 357 and can spray plasma. That is, the plasma spraying unit 359 can guide the plasma generated in the plasma generating unit 357 to the inside of the plasma main unit 31.

In addition, the plasma spray portion 359 is inclined so that its cross-sectional area increases from front to back, and the plasma expansion portion 37 may be arranged to face the plasma spray portion 359. That is, the plasma injection unit 359, together with the plasma expansion unit 37, can effectively remove nitrogen oxides by expanding the plasma inside the plasma main unit 31.

Meanwhile, the marine plasma nitrogen oxide reduction system (S) according to an embodiment of the present invention may further include a front concentration measuring unit 51 and a front circulation unit 61. The front concentration measuring unit 51 is disposed behind the plasma removal unit 3 and can measure the concentration of nitrogen oxides in the exhaust gas that has passed through the plasma removal unit 3.

The front circulation unit 61 connects one side of the front concentration measurement unit 51 and the plasma removal unit 3 and can be selectively communicated. That is, when the concentration of nitrogen oxides measured by the front concentration measuring unit 51 is higher than the first concentration, the exhaust gas can be guided to the plasma removal unit 3 through the front circulation unit 61. The first concentration may be the maximum concentration permitted by law when only the plasma removal unit 3 is provided, or may be a concentration set by the user.

That is, the front circulation unit 61 repeatedly guides the nitrogen oxides to the plasma removal unit 3 when the nitrogen oxide concentration is higher than the first concentration, thereby making the nitrogen oxide concentration less than the first concentration, so that the nitrogen oxides can be effectively removed.

The first concentration is the emission concentration of nitrogen oxides permitted by law, or is higher than the emission concentration in the case where the selective non-catalytic reduction and removal unit (7) or the selective catalytic reduction and removal unit (8), which will be described later, is provided, and the selective non-catalytic reduction and removal unit (7) is Alternatively, it can be set to a concentration that can be removed from the selective catalytic reduction removal unit (8). Additionally, the front circulation unit 61 may be provided with a valve for selective communication between the front concentration measurement unit 51 and the plasma removal unit 3.

In addition, the marine plasma nitrogen oxide reduction system (S) according to an embodiment of the present invention may further include a selective non-catalytic reduction and removal unit (7). The selective non-catalytic reduction and removal unit 7 sprays ammonia into the exhaust gas and removes nitrogen oxides at a predetermined temperature, and the predetermined temperature can be set between 900 and 1000 degrees. Accordingly, the selective non-catalytic reduction and removal unit 7 can effectively remove nitrogen oxides.

In other words, the selective non-catalytic reduction and removal unit (7) can remove nitrogen oxides in a different way from the plasma removal unit (3), thereby effectively removing nitrogen oxides, and even if the plasma removal unit (3) is broken, nitrogen oxides can be removed. Removal can be performed continuously. Additionally, the selective non-catalytic reduction and removal unit 7 can ensure that the load of the plasma removal unit 3 is distributed efficiently.

In addition, the marine plasma nitrogen oxide reduction system (S) according to an embodiment of the present invention may further include a central concentration measuring unit 53 and a central circulation unit 63. The central concentration measuring unit 53 is disposed behind the selective non-catalytic reduction and removal unit 7 and can measure the nitrogen oxide concentration of the exhaust gas passing through the selective non-catalytic reduction and removal unit 7.

The central circulation unit 63 is provided on one side of the central concentration measuring unit 53 and is connected to the front circulation unit 61 and the selective non-catalytic reduction and removal unit 7. The front circulation unit 61 and the selective non-catalytic reduction and removal unit (7) Each can be selectively communicated. The central circulation unit 63 may be provided with a valve to selectively communicate with each of the front circulation unit 61 and the selective non-catalytic reduction and removal unit 7.

If the concentration of nitrogen oxides measured by the central concentration measuring unit 53 is higher than the second concentration, the exhaust gas can be guided to the selective non-catalytic reduction and removal unit 7 through the central circulation unit 63. The second concentration may be set to a value smaller than the first concentration. If the selective catalytic reduction removal unit 8 is not provided, the second concentration may be the maximum concentration permitted by law or a concentration set by the user.

In addition, when the selective catalytic reduction and removal unit 8, which will be described later, is provided, the first concentration and second concentration values can be set higher than when the selective catalytic reduction and removal unit 8 is not provided. This is because nitrogen oxides are removed once more by the selective catalytic reduction and removal unit (8).

In addition, when the concentration of nitrogen oxides measured by the central concentration measuring unit 53 is higher than the third concentration, the exhaust gas is guided to the front circulation unit 61 and the selective non-catalytic reduction and removal unit 7 through the central circulation unit 63. can do.

The second concentration may be set to a value smaller than the third concentration. Specifically, the second concentration and the third concentration may be set to 0.9 to 0.95. That is, when the concentration of nitrogen oxides is measured at a third concentration higher than the second concentration, a portion of the exhaust gas is guided to the front circulation section 61 and returned to the front circulation section 61 and the selective non-catalytic reduction and removal section 7. Nitrogen oxides can be efficiently removed by allowing the exhaust gas to pass once and the rest of the exhaust gas to pass through the selective non-catalytic reduction and removal unit (7).

In addition, when the concentration of nitrogen oxides measured by the central concentration measuring unit 53 is higher than the fourth concentration, the exhaust gas can be guided to the front circulation unit 61 through the central circulation unit 63. The third concentration may be provided as a smaller value than the fourth concentration. Specifically, the third concentration may be 0.9 to 0.95 of the fourth concentration.

That is, when the concentration of nitrogen oxides is measured as the fourth concentration higher than the third concentration, all of the exhaust gas is guided to the front circulation section 61 and all of the exhaust gas is transferred to the front circulation section 61 and the selective non-catalytic reduction and removal section ( By passing through 7) again, nitrogen oxides can be effectively removed.

Meanwhile, the marine plasma nitrogen oxide reduction system (S) according to an embodiment of the present invention may further include a selective catalytic reduction and removal unit (8), a rear concentration measuring unit (55), and a rear circulation unit (65). The selective non-catalytic reduction and removal unit 7 may be named SNCR, and the selective catalytic reduction and removal unit 8 may be referred to as SCR.

The selective catalytic reduction and removal unit 8 is disposed behind the central concentration measuring unit 53 to remove nitrogen oxides in a different way. That is, the selective catalytic reduction and removal unit 8 can distribute the load of the plasma removal unit 3 and the selective non-catalytic reduction and removal unit 7. The rear concentration measuring unit 55 is disposed behind the selective catalytic reduction and removal unit 8 and can measure the concentration of nitrogen oxides in the exhaust gas that has passed through the selective catalytic reduction and removal unit 8.

The rear circulation unit 65 is provided on one side of the rear concentration measuring unit 55 and is connected to the front circulation unit 61, the selective non-catalytic reduction and removal unit 7 and the selective catalytic reduction and removal unit 8, and the front circulation unit ( 61), each of the selective non-catalytic reduction and removal unit (7) and the selective catalytic reduction and removal unit (8) can be selectively communicated.

The rear circulation unit 65 may be provided with a valve to selectively communicate with each of the front circulation unit 61, the selective non-catalytic reduction and removal unit 7 and the selective catalytic reduction and removal unit 8.

If the concentration of nitrogen oxides measured by the rear concentration measuring unit 55 is higher than the fifth concentration, the exhaust gas can be guided to the selective catalytic reduction and removal unit 8 through the rear circulation unit 65. The fifth concentration may be set to a value smaller than the second concentration. The fifth concentration may be the maximum concentration permitted by law or a concentration set by the user.

In addition, when the concentration of nitrogen oxides measured by the rear concentration measuring unit 55 is higher than the sixth concentration, the exhaust gas is supplied through the rear circulation unit 65 to the front circulation unit 61, the selective non-catalytic reduction and removal unit 7, and the selective It can be guided to the catalyst reduction removal unit (8).

The fifth concentration may be set to a value smaller than the sixth concentration. Specifically, the fifth concentration and the sixth concentration may be set to 0.9 to 0.95. That is, when the concentration of nitrogen oxides is measured as the sixth concentration higher than the fifth concentration, part of the exhaust gas is guided to the front circulation section 61, the selective non-catalytic reduction and removal section 7, and the selective non-catalytic reduction and removal section 7. It is allowed to pass through the catalytic reduction and removal unit (8) once again, and the rest of the exhaust gas is allowed to pass through the selective non-catalytic reduction and removal unit (7) and the selective catalytic reduction and removal unit (8) once again, or to pass through the selective catalytic reduction and removal unit (8) for efficient reduction. Nitrogen oxides can be removed with this method.

In addition, when the concentration of nitrogen oxides is measured at a sixth concentration higher than the fifth concentration, a portion of the exhaust gas is guided to the selective non-catalytic reduction and removal unit (7) and the selective non-catalytic reduction and removal unit (8). ) once again, and the rest of the exhaust gas can also be allowed to pass through the selective catalytic reduction and removal unit (8). This can be selected by the user based on usage requirements.

In addition, when the concentration of nitrogen oxides measured by the rear concentration measuring unit 55 is higher than the seventh concentration, the exhaust gas can be guided to the front circulation unit 61 through the rear circulation unit 65. The sixth concentration may be provided as a smaller value than the seventh concentration. Specifically, the sixth concentration may be 0.9 to 0.95 of the seventh concentration.

That is, when the concentration of nitrogen oxides is measured as the seventh concentration higher than the sixth concentration, all of the exhaust gas is guided to the front circulation section 61, and all of the exhaust gas is directed to the front circulation section 61 and the selective non-catalytic reduction and removal section ( 7) and the selective catalytic reduction and removal unit (8) once again to effectively remove nitrogen oxides.

Although representative embodiments of the present invention have been described in detail above, those skilled in the art will understand that various modifications can be made to the above-described embodiments without departing from the scope of the present invention. . Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims described later but also by equivalents to the claims.

S: Reduction system 1: Dust removal unit
2: Dust concentration measurement unit 3: Plasma removal unit
4: Dust circulation unit 5: Concentration measurement unit
6: Recirculation section 7: Selective non-catalytic reduction and removal section
8: Selective catalytic reduction removal unit

Claims (8)

In the plasma nitrogen oxide reduction system for ships,
A dust removal unit that sucks exhaust gas from a ship engine and removes dust in the exhaust gas;
a dust concentration measuring unit that measures the dust concentration of the exhaust gas passing through the dust removal unit;
A plasma removal unit where the exhaust gas passing through the dust concentration measuring unit is introduced and removes nitrogen oxides through plasma; and
It includes a dust circulation unit connecting the dust concentration measuring unit and the front of the dust removal unit and selectively communicating with the front of the dust removal unit,
The dust removal unit
Dust removal main body forming the exterior;
a dust filter removal unit disposed in front of the dust removal main body and having a plurality of filters to remove dust;
a dust spray removal unit disposed behind the dust filter removal unit and removing dust by spraying a liquid; and
It includes a dust electric removal unit disposed behind the dust spray removal unit and removing dust through static electricity,
The mesh size of the filter of the dust filter removal unit decreases from the front to the back,
The dust circulation part
a dust circulation body unit connecting the dust concentration measuring unit and the dust removal unit and providing a path through which the exhaust gas flows; and
It includes a dust circulation filter unit provided inside the dust circulation main body, where a plurality of filters are disposed to remove dust from the exhaust gas,
The mesh size of the dust circulation filter unit decreases from the rear to the front,
The mesh size of the filter disposed at the rearmost part of the dust circulation filter unit is smaller than the mesh size of the filter disposed at the rearmost part of the dust filter removal unit,
The plasma removal unit
a plasma body portion that forms an exterior and into which the exhaust gas passing through the dust concentration measuring portion flows;
A plasma element unit that supplies urea water so that the urea water is injected into the plasma body unit;
A plasma inducing part that induces plasma generation into the plasma body part; and
It includes a plasma expansion unit provided inside the plasma main unit to expand the plasma generated by the plasma induction unit,
The plasma induction unit
A plasma steam supply unit that supplies steam;
A plasma torch unit connected to the plasma steam supply unit;
a plasma fuel supply unit that is spaced apart from the plasma steam supply unit and the plasma torch unit and supplies fuel;
A plasma generating unit connected to the plasma steam supply unit, the plasma torch unit, and the plasma fuel supply unit; and
It includes a plasma spraying unit provided at a rear end of the plasma generating unit and spraying plasma,
The plasma injection unit is inclined so that the cross-sectional area increases from the front to the rear,
The plasma expansion portion is disposed to face the plasma spray portion,
The dust spray removal unit sprays liquid on the dust of the exhaust gas that has passed through the dust filter removal unit,
The dust filter removal unit
a front dust filter disposed in front of the dust removal main body;
A central dust filter disposed behind the front dust filter; and
It includes a rear dust filter disposed behind the central dust filter,
The length (D2) of one side of the mesh of the central dust filter is 0.85 to 0.95 of the length (D1) of one side of the mesh of the front dust filter,
The length (D3) of one side of the mesh of the rear dust filter is 0.85 to 0.95 of the length (D2) of one side of the mesh of the central dust filter,
The plasma removal unit
It further includes a plasma auxiliary unit provided to prevent the plasma from expanding beyond a certain level,
The plasma auxiliary unit
A plasma passage part disposed in the plasma main body and provided to allow wind to pass through; and
A plasma nitrogen oxide reduction system for ships, comprising: a plasma power unit disposed at a predetermined distance from the plasma passage unit and generating wind toward the plasma passage unit. delete delete According to paragraph 1,
a front concentration measuring unit disposed behind the plasma removal unit and measuring the concentration of nitrogen oxides in the exhaust gas passing through the plasma removal unit; and
It further includes a front circulation section that connects one side of the front concentration measuring section and the plasma removal section and is selectively communicated,
A plasma nitrogen oxide reduction system for ships, characterized in that when the concentration of nitrogen oxides measured by the front concentration measuring unit is higher than the first concentration, the exhaust gas is guided to the plasma removal unit through the front circulation unit. According to paragraph 4,
It further includes a selective non-catalytic reduction and removal unit disposed behind the front concentration measuring unit,
The selective non-catalytic reduction and removal unit sprays ammonia into the exhaust gas and removes nitrogen oxides at a predetermined temperature,
A plasma nitrogen oxide reduction system for ships, characterized in that the predetermined temperature is set between 900 degrees and 1000 degrees. According to clause 5,
a central concentration measuring unit disposed behind the selective non-catalytic reduction and removal unit to measure the nitrogen oxide concentration of the exhaust gas passing through the selective non-catalytic reduction and removal unit; and
It further includes a central circulation unit provided on one side of the central concentration measuring unit, connected to the front circulation unit and the selective non-catalytic reduction and removal unit, and selectively communicating with each of the front circulation unit and the selective non-catalytic reduction and removal unit,
A plasma nitrogen oxide reduction system for ships, characterized in that when the concentration of nitrogen oxides measured by the central concentration measuring unit is higher than the second concentration, the exhaust gas is guided to the selective non-catalytic reduction and removal unit through the central circulation unit. According to clause 6,
When the concentration of nitrogen oxides measured by the central concentration measuring unit is higher than the third concentration, the exhaust gas is guided to the front circulation unit and the selective non-catalytic reduction and removal unit through the central circulation unit,
A plasma nitrogen oxide reduction system for ships, characterized in that when the concentration of nitrogen oxides measured by the central concentration measuring unit is higher than the fourth concentration, the exhaust gas is guided to the front circulation unit through the central circulation unit. In clause 7,
a selective catalytic reduction and removal unit disposed behind the central concentration measuring unit; and
A marine plasma nitrogen oxide reduction system further comprising a rear concentration measuring unit disposed behind the selective catalytic reduction and removal unit and measuring the concentration of nitrogen oxides in the exhaust gas that has passed through the selective catalytic reduction and removal unit.

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