KR101489657B1 - DeSOx and DeNOx system for ship - Google Patents

Abstract

The present invention relates to a desulfurization and denitrification system for a ship capable of reducing nitrogen oxide and sulfur oxide contained in exhaust gas discharged from a diesel engine for a ship. According to an embodiment of the present invention, the desulfurization and denitrification system for a ship comprises: an exhaust flow path to discharge exhaust gas containing nitrogen oxide and sulfur oxide; exhaust gas oxidation equipment installed on the exhaust flow path to oxidize exhaust gas; a reactor, wherein the exhaust flow path passing through the exhaust gas oxidation equipment is connected with the lower part, to form slats by reacting the oxidized exhaust gas; and a mixture injecting part to inject a mixture wherein an oxidation agent, a liquid catalyst, and sea water or fresh water are mixed to the exhaust flow path in the front of the reactor.

Description

 {DeSOx and DeNOx system for ship}

The present invention relates to a ship desulfurization / denitration system, and more particularly, to a ship desulfurization / denitration system capable of simultaneously using desulfurization and denitrification processes using a liquid catalyst and using seawater or seawater.

As industrialization has progressed rapidly, the use of various fossil fuels such as petroleum and coal has increased. As a result, various harmful gases emitted from the combustion process of fossil fuels cause serious air pollution. Typical examples are smog phenomenon and acid rain.

The main cause of air pollution is sulfur oxides (SOx) and nitrogen oxides (NOx) of exhaust gas emitted from engines of vehicles and ships, thermal power plants and factories.

Recently, as the awareness of environmental conservation has increased, regulations on emission of sulfur oxides and nitrogen oxides have been introduced.

First, in the case of sulfur oxides having the greatest influence, sulfur oxides generated by combustion of fuel are a problem. As a method for reducing the generation of sulfur oxides, there is a method of selecting a fuel not containing a sulfur component or a method of removing sulfur components in the fuel to prevent the generation of sulfur oxides during combustion and a method of post-treating the exhaust gas by desulfurization .

However, in the case of economical use of sulfur-containing fuel, the sulfur component is removed through a desulfurization system which neutralizes sulfur oxides discharged after combustion.

However, even through the desulfurization facility, some of the nitrogen oxides are discharged to the atmosphere without being removed. Therefore, the desulfurization equipment and the denitrification equipment must all be provided.

In particular, ships must satisfy the IMO Tier-III, the International Standard for the Prevention of Air Pollution, as stipulated by the International Maritime Organization. Therefore, there is a need for an effective denitrification system at a low cost and high efficiency.

Typical denitrification systems include selective catalytic reduction (SCR). In the selective catalytic reduction method, the exhaust gas and the reducing agent are passed together in the reactor equipped with the catalyst, and the nitrogen oxide contained in the exhaust gas is reacted with the reducing agent to reduce the nitrogen and water vapor.

At this time, the catalyst used for denitration uses a solid catalyst activated at a temperature of 300 ° C. or more. Since the denitrification facility is poisoned by sulfur and the efficiency is lowered, the fuel is selected according to the content of sulfur and nitrogen, The facility had to be operated. Therefore, it is difficult to maintain the equipment and the cost is high.

In addition, a low-speed two-stroke diesel engine used as a propulsion power for ships is generally used with a supercharger. However, the efficiency of the denitration solid catalyst activated at a temperature of 300 ° C. or more is lowered because the temperature of the exhaust gas is lowered to 200 ° C. or lower when the exhaust gas passes through the supercharger. In order to improve this, additional deformation of the engine or additional exhaust gas heating means are additionally required, resulting in increased equipment cost and energy consumption.

Korean Patent No. 10-1180961 (2012.09.03)

The embodiment of the present invention can simultaneously perform the desulfurization process and the denitrification process and can effectively treat desulfurization and denitrification process at a low temperature as well as at a high temperature and solve the problem due to the shortage of water by using seawater due to lack of fresh water A ship desulfurization denitration system is provided.

According to an embodiment of the present invention, a ship desulfurization / denitration system for reducing nitrogen oxides and sulfur oxides contained in an exhaust gas discharged from a marine diesel engine comprises an exhaust flow path through which exhaust gas containing nitrogen oxides and sulfur oxides are discharged, A reaction tower provided on the exhaust passage for oxidizing the exhaust gas; a reaction tower for connecting the exhaust passage through the exhaust gas oxidation facility to the lower portion and reacting the oxidized exhaust gas to form a salt; And a mixture injecting unit for injecting an oxidizing agent, a liquid catalyst, and a mixture of seawater or clear water on the exhaust passage in front.

The exhaust gas oxidation facility may include at least one of an oxidation reactor for oxidizing the exhaust gas using an oxidation reaction agent and an ozone reactor for oxidizing the exhaust gas using ozone.

Specifically, the exhaust gas oxidation system includes an oxidation reactor provided on the exhaust flow path to oxidize the exhaust gas first, a reactive agent injection part that injects an oxidation reaction agent onto the exhaust flow path in front of the oxidation reactor, An ozone reactor provided on the exhaust passage behind the oxidation reactor for oxidizing the exhaust gas in a second order; and an exhaust gas supply device for supplying the oxidant gas to the exhaust gas passage in front of the ozone reactor An ozone spraying part for spraying ozone, and an ozone supplying part for supplying the ozone spraying part to the ozone spraying part.

The oxidation reactor may also serve as a cyclone separator for removing dust in the exhaust gas using a centrifugal force generated by a swirling flow of the fluid.

The oxidation agent may be at least one of sodium hydroxide, ammonia water, potassium hydroxide, and magnesium hydroxide.

The reaction tower includes a demister disposed at the top, a water spray part spraying water toward the demister, at least one packing layer provided below the demister, and at least one And a mixed additive injection part.

The desulfurization / denitration system for marine according to the present invention comprises a mixing agent storage part for collecting and storing the mixed material at a lower part of the reaction tower, and a mixed agent circulation pump for supplying the mixed material to the mixed material spray part and the at least one mixed additive spray part .

The ship desulfurization / denitration system may further include a concentration measuring unit for measuring a hydrogen ion concentration (pH) of the mixed material supplied from the mixed material storage unit to the mixed sprayer, and a concentration measuring unit And a reactant replenishing unit for replenishing the oxidation reactant so that the concentration of the stored mixture is kept constant. The reactant replenishing unit includes a reactant storage unit for storing the oxidation reactant and a reactant supply unit for supplying the oxidation reactant stored in the reactant storage unit to the mixed storage unit, A supplemental pump may be included.

The desulfurization / denitration system for marine includes a mixed filter unit for receiving the mixed material from the mixed material storage unit to remove sludge and a mixed material filtering unit for separating the salt from the liquid catalyst using a specific gravity difference, To the mixed agent storage unit.

The ship desulfurization / denitration system may further include a liquid fertilizer storage facility for receiving and storing the salt from the catalyst recovery apparatus.

In the desulfurization and denitration system for marine use described above, the salt separated and discharged from the catalyst recovery device may be mixed with seawater, adjusted to an appropriate concentration, and discharged to the sea.

The seawater may be mixed with salt after heat exchange with a mixture recovered in the mixing reservoir in the reaction tower to cool the mixture.

In addition, the temperature of the exhaust gas flowing into the reaction tower may be at least 180 degrees Celsius and not more than 250 degrees Celsius.

According to the embodiment of the present invention, the desulfurization / denitration system for marine can perform the desulfurization process and the denitration process at the same time, and it is possible to effectively perform desulfurization / denitrification process at low temperature as well as at high temperature. We can also solve problems due to shortages.

1 is a configuration diagram of a ship desulfurization / denitration system according to an embodiment of the present invention.
FIG. 2 is a view showing a mixed filter unit and a catalyst recovery unit used in the ship desulfurization / denitration system of FIG. 1; FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

The drawings are schematic and illustrate that they are not drawn to scale. The relative dimensions and ratios of the parts in the figures are exaggerated or reduced in size for clarity and convenience in the figures, and any dimensions are merely illustrative and not restrictive. And to the same structure, element or component appearing in more than one drawing, the same reference numerals are used to denote similar features.

The embodiments of the present invention specifically illustrate ideal embodiments of the present invention. As a result, various variations of the illustration are expected. Thus, the embodiment is not limited to any particular form of the depicted area, but includes modifications of the form, for example, by manufacture.

Hereinafter, a ship desulfurization / denitration system 101 according to an embodiment of the present invention will be described with reference to FIG. 1 and FIG.

The ship desulfurization / denitration facility 101 according to an embodiment of the present invention reduces sulfur oxides and nitrogen oxides contained in the exhaust gas discharged from a low-speed two-stroke diesel engine which is used as propulsion power for ships and uses a supercharger .

However, the present invention is not limited to the desulfurization / desulfurization system 101 for a ship according to an embodiment of the present invention. The exhaust gas discharged from the high-speed four-stroke diesel engine or the exhaust gas generated from the boiler- Can be reduced.

1, the ship desulfurization / denitration system 101 according to an embodiment of the present invention includes an exhaust gas passage 100, an exhaust gas oxidation facility, a reaction tower 300, and a mixed injector 470 do.

The ship desulfurization and denitration system 101 according to an embodiment of the present invention includes a mixed agent storage unit 400, a mixed material circulation pump 480, a concentration measuring unit 450, a reactant replenishing unit 500, (600), and a catalyst recovery apparatus (700).

The ship desulfurization / denitration system 101 according to an embodiment of the present invention may further include a water supply unit 800 and a liquid fertilizer storage facility 900.

The exhaust passage 100 is a passage through which exhaust gas containing nitrogen oxides and sulfur oxides moves and is discharged.

The exhaust gas oxidation unit is installed on the exhaust passage 100 to oxidize the exhaust gas.

In an embodiment of the present invention, the exhaust gas oxidizing equipment includes an oxidation reactor 200, a reactive sprayer 207, a reactant supplier 210, an ozone reactor 250, an ozone sprayer 257, (260).

The oxidation reactor 200 is installed on the exhaust passage 100 to oxidize the exhaust gas first.

In addition, in one embodiment of the present invention, the oxidation reactor 200 may also serve as a cyclone separator for removing dust in the exhaust gas by using a centrifugal force generated by a swirling flow of the fluid.

That is, the oxidation reactor 200 has a structure in which a fluid is supplied in a tangential direction from an upper part of a cylindrical body to generate a return current, and the introduced fluid swirls down and is discharged upward in the central part.

Accordingly, the fluid introduced into the oxidation reactor 200 from the tangential direction of the circumference causes a high-speed swirling flow in the cyclone, and due to this centrifugal force, the dust collides against the wall and the kinetic energy is reduced And the fluid is discharged upward through the tube at the center.

At this time, the fluid may be a mixture of the exhaust gas and the oxidation reaction agent.

However, the embodiment of the present invention is not limited to the above, and the oxidation reactor 200 may not be used as a cyclone separator, and the ship desulfurization / denitration system 101 may further include a separate dust removal apparatus.

The reaction jetting unit 207 injects the oxidation reaction agent onto the exhaust passage 100 in front of the oxidation reactor 200. That is, the oxidation agent sprayed from the reactive spraying unit 207 is mixed with the exhaust gas and flows into the oxidation reactor 200. The exhaust gas flowing into the oxidation reactor 200 is firstly oxidized while reacting with the oxidation reaction agent.

In one embodiment of the present invention, the oxidation reaction agent includes sodium hydroxide (NaOH), ammonia water (NH ₄ OH), potassium hydroxide (KOH), magnesium hydroxide (Mg (OH) 2) ) May be used.

The reactant supply part 210 supplies an oxidation reaction agent to the reactive agent spray part 207. The reactant supply portion 210 may include a reactant tank for storing the oxidation reactant and a reactant supply pump for moving the oxidation reactant.

The ozone reactor 250 is installed on the exhaust passage 100 in the rear of the oxidation reactor 200 to oxidize the exhaust gas in a second order.

The ozone injecting section 257 injects ozone onto the exhaust passage 100 in front of the ozone reactor 250. That is, the ozone O ₃ injected from the Ojunjector 257 is mixed with the exhaust gas and flows into the ozone reactor 250. The exhaust gas flowing into the ozone reactor 250 is secondarily oxidized while reacting with ozone.

The ozone supplying section 260 supplies ozone to the ozone spraying section 257. The ozone supply unit 260 may include an ozone generator.

1, the exhaust gas oxidizing system includes an oxidation reactor 200 for oxidizing exhaust gas using an oxidation reaction agent, and an ozone reactor 250 for oxidizing exhaust gas using ozone. However, The embodiment of the present invention is not limited thereto. Therefore, it is also possible to oxidize the exhaust gas using only one of the oxidation reactor 200 for oxidizing the exhaust gas using the oxidation reaction agent and the ozone reactor 250 for oxidizing the exhaust gas using ozone have.

Also, in one embodiment of the present invention, the primary oxidation using the oxidation reactor 200 is performed at 50% to 70% of the total oxidation requirement, and the secondary oxidation using the ozone reactor 250 is performed at 30% % To 50%.

On the other hand, when only one of the oxidation reactor 200 for oxidizing the exhaust gas using the oxidation reaction agent and the ozone reactor 250 for oxidizing the exhaust gas using the ozone is used, Should be performed.

The mixed injector 470 injects an oxidizing agent, a liquid catalyst, and a mixed mixture of seawater or clear water onto the exhaust passage 100 in front of the reaction tower 300 to be described later.

In one embodiment of the present invention, as the liquid catalyst, for example, a liquid catalyst disclosed in European Patent 1,742,719 can be used. Oxidation agent, as described above, sodium hydroxide (NaOH), aqueous ammonia (NH ₄ OH), potassium hydroxide (KOH), magnesium hydroxide (Mg (OH) 2), or calcium hydroxide Ca (OH) at least one of 2) Can be used.

The reaction tower (300) is connected to the exhaust passage (100) through an exhaust gas oxidation facility and reacts with oxidizing exhaust gas through the exhaust gas oxidation facility to form a salt.

Specifically, the reaction tower 300 includes a demister 380 disposed at the top, a water injector 870 injecting water toward the demister 380, at least one water injector 870 provided below the demister 380, Packing layers 361 and 362 and one or more additional mixer dispensers 471 and 472 for spraying the mixture in the reaction tower 300.

Here, the packing layers 361 and 362 may be omitted if necessary.

Further, the mixed additive spraying parts 471 and 472 spraying the mixed material in the reaction tower 300 spray a mixed material in a curtain shape to form a film of a mixed material and make a gas-liquid contact.

The water supply unit 800 supplies water to the water spray unit 870. Here, the water may be seawater or clear water.

Meanwhile, the liquid catalyst to be fed into the reaction tower 300 is mixed with water, and the liquid catalyst is used at a ratio of 60% to 55% and water at a ratio of 45% to 40%.

In one embodiment of the present invention, the demister 380 prevents water droplets from flying above the reaction tower 300. For example, the demister 380 may be a structure filled with a fiber-shaped object, and mainly removes droplets from the airflow by using an inertial force.

1, a first packing layer 361 and a second packing layer 362, a first mixture additive dispense part 471, and a second mixture additive dispense part 472 are provided. However, But is not limited thereto. Accordingly, one packing layer 361, 362 and mixed additive dispensing parts 471, 472 or three or more packing layers 361, 362 and mixed additive dispensing parts 471, 472 can be installed. Here, the packing layers 361 and 362 may be omitted.

The first mixed additive dispensing part 471 and the second mixed additive dispensing part 472 spray the mixed material so that the mixed material meets the exhaust gas and forms a film of the mixed material to be in gas-liquid contact, Liquid contact between the first sealing layer 361 and the second sealing layer 362. That is, the droplets sufficiently contact with and mixed with the exhaust gas in the form of curtains in the mixed additive spraying parts 471 and 472, and further, if necessary, the first packing layer 361 and the second packing layer 362, And exhaust gas in the gaseous state can be effectively mixed.

The mixed agent storage part 400 collects and stores the mixed agent in the lower part of the reaction tower 300.

The mixer circulation pump 480 supplies the mixture of the mixed agent storage part 400 to the mixed agent spray part 470, the first mixed agent addition spray part 471 and the second mixed agent additional spray part 472, respectively.

That is, the mixed agent stored in the mixed agent storage part 400 is injected through the mixed agent spray part 470, the first mixed agent addition spray part 471, and the second mixed agent additional spray part 472 and reacted with the exhaust gas And is returned to the mixed agent storage unit 400 again.

When the mixed material is recovered from the reaction tower 300 to the mixed material storage unit 400, the salts of the sulfuric acid and the nitric oxide generated by the reaction of the mixed material and the exhaust gas are moved to the mixed material storage unit 400 together.

As described above, the exhaust gas is subjected to the primary oxidation and the secondary oxidation to generate salts in the reaction tower 300, and sulfur oxides and nitrogen oxides are effectively reduced.

In addition, the temperature of the exhaust gas flowing into the reaction tower 300 is not lower than 180 degrees Celsius and not higher than 250 degrees Celsius.

As described above, according to the embodiment of the present invention, sulfur oxides and nitrogen oxides contained in the exhaust gas of relatively low temperature can be effectively reduced.

The concentration measuring unit 450 measures the hydrogen ion concentration (pH) of the mixed agent supplied from the mixed agent storage unit 400 to the mixed spraying unit 470.

The reactant replenishing unit 500 replenishes the oxidant so that the concentration of the mixed material stored in the mixed material storage unit 400 is kept constant based on the concentration measured by the concentration measuring unit 450.

Among the components of the mixed agent, since the oxidizing agent reacts with the exhaust gas, the concentration of the oxidizing agent in the components of the mixed agent decreases as the mixing and recovery of the mixed agent is repeated.

Accordingly, in one embodiment of the present invention, the reactant of the reactant replenishing unit 500 is appropriately supplied to the mixed agent storage unit 400 according to the concentration of the mixed agent measured by the concentration measuring unit 450, Ratio.

Specifically, the reactant replenishing unit 50 includes a reactant storing unit 550 for storing an oxidizing agent, an oxidizing agent storing unit 550 for operating in accordance with the concentration measured by the concentration measuring unit 450, And a reactive agent replenishing pump 580 for supplying the reactant to the mixed agent storage portion 400.

As shown in FIG. 2, the mixed filter unit 600 receives the mixed material from the mixed material storage unit 400 and removes the sludge. The mixed agent injected into the reaction tower 300 is returned to the mixed agent storage part 400 together with impurities such as salt and dust resulting from the reaction. Accordingly, the salts and impurities accumulate in the mixed agent storage part 400 as the mixture circulates repeatedly. The mixed agent stored in the mixed agent storage unit 400 is filtered and reused through the mixed agent filtering unit 600.

The catalyst recovery apparatus 700 separates the mixed catalyst from the liquid catalyst and the salt using the specific gravity difference, and then transfers the liquid catalyst to the mixed agent storage unit 400.

When using ammonia water, the salt separated from the liquid catalyst may include ammonium sulfate (NH ₄ ) ₂ SO ₄ and ammonium nitrate (NH ₄ NO ₃ ).

Ammonium sulfate is a fertilizer containing ammonia and nitrogen, and is the most abundant with the urea. It is a short-acting nitrogen fertilizer and it is easy to handle due to its low hygroscopicity.

Ammonium nitrate is a nitrate of ammonia, a white crystalline solid at atmospheric pressure and at room temperature. It is a high nitrogen fertilizer commonly used in agriculture.

Thus, the salt of sulfuric acid and nitric oxide separated from the liquid catalyst can be utilized as fertilizer.

(NaOH) or ammonia water (NH4OH) may be used in the ship. These salts may be mixed with seawater, adjusted to a proper concentration, discharged to the sea, or stored in a liquid fertilizer storage unit 900, It can be utilized as a material.

At this time, the seawater can be mixed with the salt after cooling the mixed material by heat exchange with the mixed material recovered in the mixed material storage part 400 in the reaction tower 300. That is, the seawater cools the mixture while undergoing heat exchange, and since the temperature is raised by itself, it can be effectively mixed with the salt at a proper concentration.

Hereinafter, the desulfurization and denitrification principle of the ship desulfurization / denitration system 101 according to an embodiment of the present invention will be described in detail.

First, in the desulfurization process, sulfuric acid reacts with water to form sulfurous acid (H ₂ SO ₃ ), and sulfurous acid is coupled to a liquid catalyst as shown in the following reaction formula 1,

[Reaction Scheme 1]

SO ₂ + H ₂ O - > H ₂ SO ₃

[Reaction Scheme 2]

H ₂ SO ₃ + organic liquid phase catalyst (LPC) → LPC ㅇ H ₂ SO ₃

And as shown in Scheme 3 below, as sulfur dioxide is oxidized in the liquid phase catalytic sulfuric acid (H ₂ SO ₄₎ is, sulfuric acid reacts with the liquid catalyst as separate from the oxidation agent of aqueous ammonia or sodium hydroxide, ammonium ((NH _{4) 2} SO sulfate ₄ ) or manganese (Na2SO4).

[Reaction Scheme 3]

LPC H ₂ SO ₃ + O ₂ → H ₂ SO ₄ + LPC H ₂ SO ₄ + NH ₃ O H ₂ O → (NH ₄ ) ₂ SO ₄ + H ₂ O

LPC H ₂ SO ₃ + O ₂ → H ₂ SO ₄ + LPC H ₂ SO ₄ + ₂ NaOH → Na ₂ SO ₄ + H ₂ O

Next, look at the denitrification process.

Nitrogen oxide (NOx) contained in the exhaust gas generated in the combustion process of the engine occupies about 5% of the total exhaust gas such as nitrogen monoxide (NO), nitrogen dioxide (NO ₂ ) and the like. And the concentration of nitrogen oxide is about 200 ppm to 2500 ppm. Here, nitrogen monoxide (NO) is a relatively inert gas. Therefore, it is not absorbed in the basic aqueous solution and does not dissolve in water. In order for nitrogen monoxide (NO) to be absorbed into the aqueous solution, it must be oxidized to ozone (O ₃ ).

Nitrogen oxides are bound to the liquid phase catalyst in the form of nitrous acid (HNO ₂ ) via Scheme 4, Scheme 5 and Scheme 6.

[Reaction Scheme 4]

NO + O ₃ ? NO ₂ + O ₂

[Reaction Scheme 5]

NO ₂ + H ₂ O → HNO ₂

[Reaction Scheme 6]

HNO ₂ + organic liquid phase catalyst (LPC) → LPC ㅇ HNO ₂

And nitrous acid (HNO ₂₎ is nitric acid (HNO ₃₎ as shown in Scheme 7 below, as oxide, as separate from the nitric acid liquid catalyst, as shown in Scheme 8 below, the oxidation agent of aqueous ammonia or by reaction with sodium hydroxide of ammonium nitrate (NH ₄ NO ₃ ) or sodium nitrate (NaNO ₃ ).

[Reaction Scheme 7]

LPC O HNO ₂ + O ₂ HNO ₃ + LPC

[Reaction Scheme 8]

HNO ₃ + NH ₃ ㅇ H ₂ O → NH ₄ NO ₃ + H ₂ O

HNO ₃ + NaOH → NaNO ₃ + H ₂ O

With this configuration, the ship desulfurization / denitration system 101 according to an embodiment of the present invention can simultaneously perform the desulfurization process and the denitration process, and can also effectively perform the desulfurization / denitration process at a low temperature exhaust gas.

In particular, according to an embodiment of the present invention, when the temperature of the exhaust gas flowing into the reaction tower 300 is 150 ° C or more and 350 ° C or less, nitrogen oxide contained in the exhaust gas can be removed by 80% or more.

This is very effective for application to a low speed diesel engine for ships having a low exhaust gas temperature by using a supercharger in consideration of an activation temperature of a catalyst used in a selective catalytic reduction (SCR) method of 300 degrees Celsius or more.

In addition, compared with the selective catalytic reduction (SCR) method, the cycle is long and the maintenance is relatively simple. That is, the ship desulfurization / denitration system 101 according to an embodiment of the present invention does not require additional time for maintenance because the maintenance is performed only when the liquid catalyst is supplemented.

In addition, the ship desulfurization / denitration system 101 according to an embodiment of the present invention can greatly reduce the overall size by integrating the desulfurization facility and the denitration facility.

In addition, since desulfurization is performed together with denitrification, propellant fuel can be used irrespective of the sulfur content of the fuel oil to be regulated on the ship, thereby reducing the operating cost of the ship.

In addition, according to one embodiment of the present invention, the material of the fertilizer can also be produced incidentally.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. will be.

It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive, the scope of the invention being indicated by the appended claims, It is intended that all changes and modifications derived from the equivalent concept be included within the scope of the present invention.

101: Ship's desulfurization denitration system
100: exhaust channel 200: oxidation reactor
207: Reactor dispenser 210: Reactor feeder
250: ozone reactor 257: ozone sprayer
260: ozone supply part 300: reaction tower
361: first packing layer 362: second packing layer
380: Demister 400: Mixer reservoir
450: density measuring unit 470:
471: first mixed additive dispensing part 472: second mixed additive dispensing part
480: Mixer circulation pump 500:
550: Reactor storage part 580: Reactor replenishment pump
600: mixed filter unit 700: catalyst recovery unit
800: water supply part 870: water spray part
900: liquid fertilizer storage unit

Claims (13)

A ship desulfurization denitration system for reducing nitrogen oxides and sulfur oxides contained in an exhaust gas discharged from a marine diesel engine,
An exhaust passage through which exhaust gas containing nitrogen oxides and sulfur oxides is discharged;
An exhaust gas oxidation system installed on the exhaust flow path to oxidize the exhaust gas;
A reaction tower in which the exhaust passage through the exhaust gas oxidation facility is connected to the lower portion and which reacts with the oxidized exhaust gas to form a salt; And
A mixed agent spraying unit for spraying an oxidizing agent, a liquid catalyst, and a mixed material mixed with seawater or fresh water on the exhaust passage in front of the reaction tower,
Lt; / RTI >
The exhaust gas oxidizing equipment includes:
An oxidation reactor installed on the exhaust passage and oxidizing the exhaust gas first;
A reaction jetting unit for jetting an oxidation reaction agent onto the exhaust flow path in front of the oxidation reactor;
A reactive agent supply unit for supplying the oxidation agent to the reactive agent injection unit;
An ozone reactor installed on the exhaust passage behind the oxidation reactor for oxidizing the exhaust gas in a second order;
An ozone spraying unit for spraying ozone onto the exhaust passage in front of the ozone reactor; And
And an ozone supply part for supplying ozone to the ozone spray part,
And a desulfurization unit for desulfurization. delete delete The method of claim 1,
The oxidation reactor also serves as a cyclone separator for removing dust in the exhaust gas by using a centrifugal force generated by a swirling flow of fluid. delete A ship desulfurization denitration system for reducing nitrogen oxides and sulfur oxides contained in an exhaust gas discharged from a marine diesel engine,
An exhaust passage through which exhaust gas containing nitrogen oxides and sulfur oxides is discharged;
An exhaust gas oxidation system installed on the exhaust flow path to oxidize the exhaust gas;
A reaction tower in which the exhaust passage through the exhaust gas oxidation facility is connected to the lower portion and which reacts with the oxidized exhaust gas to form a salt; And
A mixed agent spraying unit for spraying an oxidizing agent, a liquid catalyst, and a mixed material mixed with seawater or fresh water on the exhaust passage in front of the reaction tower,
Lt; / RTI >
In the reaction tower,
A demister at the top;
A water spraying part for spraying water toward the demister;
At least one packing layer disposed below the demister; And
One or more mixed additive dispensing parts for spraying the above-
Lt; / RTI >
A mixed agent storage part for collecting and storing the mixed agent in a lower part of the reaction tower;
A mixed agent circulating pump for supplying the mixed agent in the mixed agent storage portion to the mixed-
Further comprising a desulfurization denitration system for marine use. delete The method of claim 6,
A concentration measuring unit for measuring a hydrogen ion concentration (pH) of the mixed agent supplied to the mixed agent dispensing unit from the mixed agent storage unit;
And a concentration measuring unit for measuring the concentration of the mixed agent stored in the mixed agent storage unit based on the concentration measured by the concentration measuring unit,
Further comprising:
The reactant replenishing unit includes:
A reactant storage part for storing the oxidation reaction agent;
And the concentration measuring unit operates according to the measured concentration to supply the oxidizing agent stored in the reactant storage unit to the mixed agent storage unit
And a desulfurization unit for desulfurization. The method of claim 6,
A mixture filtering unit for removing the sludge by receiving the mixed material from the mixture storage unit;
A catalyst recovery device for separating the liquid catalyst and the salt by using the specific gravity difference and delivering the liquid catalyst to the mixed agent storage part,
Further comprising a desulfurization denitration system for marine use. The method of claim 9,
And a liquid fertilizer storage facility for receiving and storing the salt from the catalyst recovery device. The method of claim 9,
The desulfurization denitrification system for ships is prepared by mixing the salt separated and discharged from the catalyst recovery device with seawater, adjusting the concentration to an appropriate concentration, and discharging it to the sea. 12. The method of claim 11,
Wherein the seawater is heat-exchanged with the mixed material recovered in the mixed storage part in the reaction tower to cool the mixed material and then mixed with the salt. delete

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