KR102225344B1 - Marine 3D Exhaust Gas Spray Injector - Google Patents

Abstract

The present invention relates to an exhaust gas spray injector for a vessel for reducing NOx contained in exhaust gas. The exhaust gas spray injector includes: a gas supply pipe including a gas inlet formed at one end for the inflow of gas, a gas outlet formed at the other end for discharging the gas flowing from the gas inlet, and a plurality of gas flow paths provided between the gas inlet and the gas outlet to guide the movement of the gas; a spray nozzle including a connection port formed at one end to communicate with the gas outlet, and a gas spray port formed at the other end in a direction in which the gas is sprayed to the outside, thereby spraying the gas as the gas passes through the spray port via the connection port; and a gas supply pipe including a gas inlet formed at one end for the inflow of gas, a gas outlet formed at the other end to discharge the gas flowing from the gas inlet by communicating with the connection port, and a gas flow path formed between the gas inlet and the gas outlet to guide the movement of the gas. The cross-section area of the spray port is formed to be larger than the cross-section area of the connection port.

Description

Marine 3D Exhaust Gas Spray Injector}

The present invention relates to a three-dimensional exhaust spray injector for a ship, and more particularly, a three-dimensional exhaust gas spray injector for a ship capable of reducing pollution of exhaust gas through a gas supply pipe and a gas supply pipe having a plurality or more different lengths. It is about.

Engines using fossil fuels are the most widely used until now as a power source for vehicles and ships that are generally used.

Fossil fuel refers to fuel based on petroleum such as diesel oil and gasoline, and the engine of a vehicle generates power to drive a vehicle from energy generated by burning the fossil fuel.

At this time, when fossil fuels are burned, nitrogen oxides (commonly referred to as NOx) such as NO and NO2 or particulate matter (Particulate Matters, PM) may be generated. In the case of nitrogen oxides, many environmental problems such as acid rain or photochemical smog may be caused. It is well known that particulate matter also causes various problems, such as causing respiratory diseases.

Accordingly, in general, a vehicle is provided with a device for purifying harmful substances such as nitrogen oxides and particulate matter before discharging exhaust gas generated after combustion.

The selective catalytic reduction (SCR) device is a device that specifically purifies nitrogen oxides among such exhaust purification devices. In general, it is well known that it is possible to easily reduce and purify nitrogen oxides by reacting ammonia (NH3) with exhaust gas, and therefore, ammonia can be directly used as a reducing agent in an exhaust purification apparatus of an industrial facility such as a factory.

However, since ammonia itself is a toxic and odorous substance, in the case of a vehicle, if ammonia is directly loaded, there is a risk of causing a discomfort due to a health problem or an odor of a person in the vehicle due to the leakage of ammonia.

Accordingly, non-toxic urea water is generally supplied to the selective reduction catalyst device provided in the vehicle, and the urea water is decomposed by the heat of the exhaust gas to generate ammonia, thereby allowing the reduction of nitrogen oxides to occur.

That is, the selective reduction catalyst device includes a urea water supply unit and an input unit to inject urea water in front of the SCR (selective catalytic reduction) catalyst, and further includes a nitrogen oxide sensor and a urea water injection control device. Spray water.

The injected urea water is pyrolyzed into ammonia by the heat of the exhaust gas of the diesel engine in the exhaust pipe. The ammonia produced in this way reacts with nitrogen oxides contained in the exhaust gas in the SCR catalyst installed at the rear end of the exhaust pipe to produce water and nitrogen.

In order to effectively reduce nitrogen oxides, ammonia and nitrogen oxides must be reduced to nitrogen by reacting at a set ratio at high temperature. That is, ammonia and exhaust gas must be quickly mixed, and for this, heating and atomization of urea water are essential.

In addition, burners used in industrial furnaces, kilns, boilers, incinerators, and the like have a large amount of oil combustion. Therefore, the operation cost and environmental pollution are greatly affected according to the performance, so when the burner is set, it is possible to burn with low excess air, and the flame must be short and the calorific value must be high. In addition, the generation of dust and pollutants such as SO4 and NOx (nitrogen oxide) should be small, and the stability and responsiveness of the flame should be high.

In order to achieve good combustion like this, the injection state of fuel must be good, and the mixture of the injected fuel and combustion air must be perfect, and the amount of combustion air, air flow rate, uniformity of air flowing into the resistor, and air in the flame retardant Rotation and the like have a great influence on combustion, and these factors largely depend on the structural characteristics of the fuel injection nozzle.

In general, conventional injection nozzles that can be burned by spraying oil fuel can be classified into an internal mixing type, an external mixing type, and an intermediate mixing type, depending on the mixing position of the oil fuel and an atomization material for fine particles of the oil fuel. Here, compressed air or water vapor is used as the atomizing material, but since the gas has a low density, a large relative velocity is generated between the liquid having a low injection speed even at a low injection pressure, so that the atomization of the liquid occurs.

Fig. 1 shows a generally used fuel injection nozzle in a schematic cross-sectional view.

1, the fuel injection nozzle 1 is provided with a fuel supply pipe 10 through which fuel is supplied. An injection nozzle 20 is coupled to the front end of the fuel supply pipe 10.

The injection nozzle 20 has a plurality of injection holes 22 formed in an annular shape in a direction in which fuel is supplied. When the fuel is injected through the injection hole 22, the fuel is injected toward the front of the injection nozzle 20, so that the fuel cannot be injected into the middle portion C of the injection hole 22.

Therefore, when the injection nozzle 20 is installed in the combustion chamber S to perform the combustion process, the flame is divided up and down by the fuel injected through the injection hole 22 of the injection nozzle 20, and at this time, Even if gas such as air is supplied through the air inlet pipe 40, air is supplied only to the outer part of both flames, so that air is not supplied smoothly to the middle part (B) of the injection port 22 and the temperature is increased. And, there is a problem that the amount of generation of NOx (nitrogen oxide), which is an environmental pollutant, increases.

Republic of Korea Utility Model Publication No. 20-0191094 Korean Patent Registration No. 10-1867367

Accordingly, the present invention has been devised to solve the above problems, and the problem to be solved of the present invention is that the spray angle is increased when exhaust gas is discharged from the ship and at the same time, the gas is configured to be smoothly mixed. It is to provide a three-dimensional exhaust gas atomizing injector for ships.

However, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems that are not mentioned are clearly to those of ordinary skill in the technical field to which the present invention belongs from the following description. It will be understandable.

The present invention was created to improve the problems of the prior art as described above, in the marine exhaust gas spraying device for reducing NOx contained in the exhaust gas, a gas inlet for inflow of gas is formed at one end, A gas supply pipe having a gas discharge port through which the gas introduced from the gas inlet is discharged at the other end, and having a plurality of gas flow paths for guiding movement of the gas between the gas inlet and the gas discharge port; A spray nozzle having a connector formed at one end in communication with the gas discharge port, and a spray port formed at the other end in a direction in which gas is sprayed to the outside, so that gas and gas are sprayed while passing through the connector and passing through the spray port; And a gas inlet port for inflow of gas is formed at one end, and a gas outlet port through which gas introduced from the gas inlet port is discharged is formed at the other end by communicating with the connector, and movement of the gas between the gas inlet port and the gas outlet port is formed. And a gas supply pipe in which a gas flow path for guiding is formed, and a cross-sectional area of the spray port may be formed larger than a cross-sectional area of the connector.

In addition, the gas supply pipe extends in a horizontal direction from the inlet port toward the discharge port, and is formed to correspond to the left and right sides of the center flow pipe and the center flow pipe in which the ultrasonic generator is installed inside. It is configured to include a slewing flow pipe, and the slewing flow pipe may be formed in a curved shape.

In addition, the cross-sectional area of the gas inlet is smaller than the cross-sectional area of one end of the gas flow pipe connected in the horizontal direction to the gas inlet, and the cross-sectional area of one end of the gas flow pipe is smaller than the cross-sectional area of the center of the gas flow pipe, and the The cross-sectional area of the center of the gas flow pipe may be smaller than or equal to the cross-sectional area of the other end of the gas flow pipe connected to the gas discharge port.

In addition, it may be formed to be tapered in a direction in which the width increases from one end of the center flow pipe toward the center of the center flow pipe.

In addition, a plurality of orbiting flow path pipes may be disposed radially around the spray nozzle.

In addition, the gas inlet may be connected to an exhaust chamber in which the pressurized exhaust gas is accommodated.

In addition, the gas supply pipe may have a length-to-diameter ratio of 5:1 to 10:1.

In addition, a perforated plate in which a plurality of through holes are formed may be coupled to the spray port of the spray nozzle.

In addition, the gas discharge port of the gas supply pipe may be installed at a position adjacent to the other end of the center flow pipe.

According to the three-dimensional exhaust gas spray injector for incineration according to an embodiment of the present invention, since the exhaust gas flows through a gas supply pipe composed of a plurality of gas flow pipes and is sprayed through the spray nozzle, the size of the spray droplet is small and wide. As it is sprayed while spreading, it has the effect of remarkably reducing the amount of nitrogen oxides (NOx) generated during combustion.

However, the effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those of ordinary skill in the art from the following description. I will be able to.

The following drawings appended in the present specification illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention together with the detailed description of the present invention to be described later. It is limited only to and should not be interpreted.
1 is a schematic cross-sectional view showing a generally used fuel injection nozzle.
2 is a view showing a ship exhaust system to which a three-dimensional exhaust gas spray injector for a ship according to an embodiment of the present invention is applied.
3 is a perspective view showing the configuration of a three-dimensional exhaust gas spray injector for a ship according to an embodiment of the present invention.
4 is a schematic cross-sectional view showing the configuration of a three-dimensional exhaust gas spray injector for a ship according to an embodiment of the present invention.
5 and 6 are views showing the shape and flow analysis of a three-dimensional exhaust gas spray injector for a ship according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention. However, since the description of the present invention is merely an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, since the embodiments can be variously changed and have various forms, the scope of the present invention should be understood to include equivalents capable of realizing the technical idea. In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all or only such effects, the scope of the present invention should not be understood as being limited thereto.

The meaning of the terms described in the present invention should be understood as follows.

Terms such as "first" and "second" are used to distinguish one component from other components, and the scope of rights is not limited by these terms. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component. When a component is referred to as being "connected" to another component, it should be understood that although it may be directly connected to the other component, another component may exist in the middle. On the other hand, when a component is referred to as being "directly connected" to another component, it should be understood that there is no other component in the middle. On the other hand, other expressions describing the relationship between components, that is, "between" and "just between" or "neighboring to" and "directly neighboring to" should be interpreted as well.

Singular expressions are to be understood as including plural expressions unless the context clearly indicates otherwise, and terms such as "comprises" or "have" refer to the specified features, numbers, steps, actions, components, parts, or these. It is to be understood that it is intended to designate that a combination exists and does not preclude the presence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the field to which the present invention belongs, unless otherwise defined. Terms defined in commonly used dictionaries should be interpreted as having meanings in the context of related technologies, and cannot be interpreted as having an ideal or excessively formal meaning unless explicitly defined in the present invention.

2 shows a ship exhaust system to which a three-dimensional exhaust gas spray injector for a ship according to an embodiment of the present invention is applied.

As shown in Figure 2, the three-dimensional exhaust gas spray injector is a main exhaust pipe connected to the main engine 10 of the ship while a plurality of (mainly 4 to 5) spray injectors form one exhaust unit 30 ( It is connected to 20), and the exhaust gas generated when the main engine 10 is operated can be effectively and efficiently discharged by reducing pollutants by using a three-dimensional exhaust gas spray injector, which will be described later.

3 is a perspective view showing a configuration of a three-dimensional exhaust gas spray injector for incineration according to an embodiment of the present invention.

As shown in FIG. 3, a gas supply pipe 100 is provided in the three-dimensional exhaust gas spray injector for incineration. In this embodiment, the gas supply pipe 100 is provided with gas flow pipes 110 and 111, a gas inlet 120 and a gas outlet 130.

The gas inlet 120 is a portion through which the gas delivered from the gas chamber 140 connected to the exhaust pipe 20 to be described below is introduced, and the gas outlet 130 is This is the part that is ejected. In addition, the gas flow pipes 110 and 111 are provided between the gas inlet 120 and the gas outlet 130.

In this embodiment, the length-to-diameter ratio of the gas supply pipe 100 is preferably 5:1 to 10:1. This is to ensure that the gas flows evenly while moving along the gas supply pipe 100.

In this embodiment, the gas supply pipe 100 is provided with a gas flow path pipe 101. The gas flow path pipe 101 may be configured as a pipe having different lengths.

The gas flow path pipe 101 may include a center flow path pipe 110 and a turning flow path pipe 111. As shown in FIG. 4, the center flow path pipe 110 extends in a horizontal direction from the gas inlet 120 toward the gas outlet 130. One end (110a) of the center flow path pipe (110) is connected to the gas inlet 120, the other end (11b) is connected to the gas discharge port (130).

In this embodiment, the cross-sectional area of the gas inlet 120 is smaller than the cross-sectional area of one end 110a of the center flow path pipe 110. That is, as shown in FIG. 4, the width of the gas inlet 120 is smaller than the width of one end 110a of the center flow path pipe 110. In addition, the cross-sectional area of one end 110a of the center channel tube 110 is smaller than the cross-sectional area of the center 110c of the center channel tube 110.

In addition, the cross-sectional area of the center 110c of the center channel tube 110 may be smaller than or equal to the cross-sectional area of the other end 110b of the center channel tube 110 connected to the gas discharge port 130. That is, the width of the center 110c of the center flow pipe 110 may be equal to or smaller than the width of the gas discharge port 130 and may be formed to have a large width.

Meanwhile, the cross-sectional area of the gas inlet 120 is smaller than the cross-sectional area of the orbiting flow path pipe 111. That is, as shown in FIG. 4, the width of the gas inlet 120 is smaller than the width of one end 111a of the orbiting flow path pipe 111.

In addition, the cross-sectional area of the one end 111a of the orbiting channel tube 111 is smaller than the cross-sectional area of the center 111c of the orbiting channel tube 111, and the cross-sectional area of the center 111c of the orbiting channel tube 111 is It may be smaller than or equal to the cross-sectional area of the other end 111b of the orbiting flow path pipe 111 connected to the gas discharge port 130.

In addition, it may be formed to be tapered in a direction in which the width increases from one end 110a of the center flow pipe 110 toward the center 110c of the center flow pipe 110.

Meanwhile, the orbiting flow path pipe 111 is formed to correspond to the left and right sides of the center flow path pipe 110, respectively. That is, the orbiting flow path pipe 111 may be disposed radially around the center flow path pipe 110. Here, the orbiting flow path pipe 111 may be formed in a curved shape. This is to allow the fuel to be stagnated for a predetermined time and spread out widely through the orbiting flow path pipe 111.

In the present embodiment, the cross-sectional area of the center 110c of the center flow path tube 110 may be larger than the cross-sectional area of the center 111c of the orbiting flow path tube 111. This is to allow the gas to smoothly exit through the center flow path pipe 110 rather than the orbiting flow path pipe 111.

In this embodiment, there are two orbiting flow path tubes 111, but are not necessarily limited thereto. For example, a plurality of orbiting flow path pipes 111 may be provided radially around the center flow path pipe 110.

According to the gas supply pipe 100 configured as described above, as gas flows in from the gas inlet 120, it passes through the center flow path pipe 110, and at the same time passes the orbiting flow path pipe 111, the left and right flows are induced. , Through this flow, the gas flows to the left and right in the center flow pipe 110 and spreads out to go out to the gas discharge port 130, so that the spray angle of the gas can be expanded.

In addition, since gas passes through the other end (110b) of the center flow path pipe (110) and the other end (111b) of the turning flow path pipe (111) and at the same time goes out to the gas discharge port (130), that is, the center flow path pipe ( The gas passing through 110 collides with the gas passing through the orbiting passage pipe 111 at the gas discharge port 130 and flows largely, so that the atomization angle can be further increased while colliding with each other and atomization occurs.

Therefore, as shown in Figs. 5 and 6, the center passes through the gas inlet 120 and passes through one end 110a of the center flow path pipe 110 and one end 111b of the orbiting flow path pipe 111. The flow of the gas passing through the flow path pipe 110 occurs, and the gas passing through the center flow pipe 110 meets the gas passing through the orbiting flow pipe 111 at the gas discharge port 130 and flows largely. Therefore, it forms a large flow angle.

In this way, when the gas flows through the gas supply pipe 100 and the spray angle increases, when it encounters another gas, it collides with each other and finally atomization occurs, reducing the size of the gas droplet and allowing it to be easily mixed with the gas. In addition, since the spray angle is wider and the combustion efficiency can be further increased, the amount of nitrogen oxide (NOx) generated during combustion can be significantly reduced.

Meanwhile, the gas inlet 120 is connected to the exhaust chamber 140 connected to the exhaust pipe 20. The exhaust chamber 140 may contain pressurized exhaust gas.

Meanwhile, as shown in FIG. 3, a gas supply pipe 200 may be provided in the three-dimensional exhaust gas spray injector for ships. The gas supply pipe 200 serves to supply a gas such as air to the exhaust gas.

In this embodiment, a gas inlet 210 is formed at one end of the gas supply pipe 200. The gas inlet 210 is a part for inflow of gas.

A gas discharge port 220 is formed at the other end of the gas supply pipe 200. The gas discharge port 220 communicates with the connector 310 of the spray nozzle 300 to be described below. The gas discharge port 220 is a portion through which the gas introduced from the gas inlet 210 is discharged. The gas discharge port 220 may be installed at a position adjacent to the other end 110b of the center flow path pipe 110. Alternatively, the gas discharge port 220 may be installed between the other end 111b of the orbiting flow path pipe 111. This is to facilitate mixing of the gas with the exhaust gas.

A gas flow path 230 is formed between the gas inlet 210 and the gas outlet 220. The gas flow path 230 serves to guide the movement of the gas.

In this embodiment, only one gas supply pipe 200 is provided, but is not limited thereto. For example, the gas supply pipe 200 may be composed of a plurality of pieces as needed, and in this case, the gas supply pipe 200 may be disposed to cross each other with the orbiting flow path pipe 111.

A gas chamber 240 is connected to one end of the gas supply pipe 200. Pressurized gas may be accommodated in the gas chamber 240. In this embodiment, the gas is air, but it is not necessarily limited thereto. For example, it may be water vapor.

Meanwhile, as shown in FIGS. 3 and 4, a spray nozzle 300 is provided in the three-dimensional exhaust gas spray injector for ships. The spray nozzle 300 serves to disperse gas and gas.

A connector 310 is formed at one end of the spray nozzle 300. The connector 310 communicates with the gas outlet 130 and the gas outlet 220.

A spray port 320 is formed at the other end of the spray nozzle 300. The spray port 320 is formed in a direction sprayed to the outside, that is, a direction sprayed toward the combustion chamber (S). In this embodiment, the cross-sectional area of the spray port 320 is formed larger than the cross-sectional area of the connector 310. Accordingly, gas and gas are spread widely while passing through the connector 310 and the atomizing port 320, so that the gas flowing through the gas discharge port 220 vortex, so that the gas and the gas may be mixed well.

Meanwhile, a porous plate (not shown) may be selectively coupled to the spray port 320 of the spray nozzle 300. The porous plate has a plurality of through-holes, so that when gas and gas are mixed and sprayed, the spray angle is further widened while passing through the through-hole.

As described above, according to the three-dimensional exhaust gas spray injector for ships according to the present embodiment, the gas flows through the gas supply pipe 100 composed of the center flow path pipe 110 and the plurality of orbiting flow path pipes 111, and the spray nozzle 300 ), so it can be sprayed while spreading widely.

Accordingly, since the exhaust gas emission efficiency can be increased, the amount of nitrogen oxides (NOx) generated during combustion can be significantly reduced.

Detailed description of the preferred embodiments of the present invention disclosed as described above has been provided to enable those skilled in the art to implement and practice the present invention. Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art will understand that various modifications and changes can be made to the present invention without departing from the scope of the present invention. For example, a person skilled in the art may use the configurations described in the above-described embodiments in a manner that combines them with each other. Accordingly, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The present invention may be embodied in other specific forms without departing from the spirit and essential features of the present invention. Therefore, the detailed description above should not be construed as restrictive in all respects and should be considered as illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention. The invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. In addition, the embodiments may be configured by combining claims that do not have an explicit citation relationship in the claims, or may be included as new claims by amendment after filing.

1: the ship's exhaust system
10: main engine
20: main exhaust pipe
30: exhaust unit
100: gas supply pipe
110: Center Euro Hall
111: turning euro tube
120: gas inlet
130: gas discharge port
140: exhaust chamber
200: gas supply pipe
210: gas inlet
220: gas discharge port
230: gas flow path
300: spray nozzle
310: connector
320: spray port
S: combustion chamber

Claims (9)

In the marine exhaust gas spraying device for reducing NOx contained in exhaust gas,
A gas inlet port for gas inflow is formed at one end, a gas outlet port through which gas introduced from the gas inlet port is discharged is formed at the other end, and a plurality of gas flow paths guide the movement of gas between the gas inlet port and the gas discharge port A gas supply pipe provided;
A spray nozzle having a connector formed at one end in communication with the gas discharge port, and a spray port formed at the other end in a direction in which gas is sprayed to the outside, so that gas and gas are sprayed while passing through the connector and passing through the spray port; And
A gas inlet port for inflow of gas is formed at one end, and a gas discharge port through which gas introduced from the gas inlet port is discharged is formed at the other end by communicating with the connector, and guides the movement of gas between the gas inlet port and the gas discharge port. And a gas supply pipe in which a gas flow path is formed,
The three-dimensional exhaust gas spray injector for ships, characterized in that the cross-sectional area of the spray port is formed larger than the cross-sectional area of the connector. The method of claim 1,
The gas supply pipe,
A center flow path pipe extending in a horizontal direction from the gas inlet port toward the gas discharge port and in which an ultrasonic generator is installed, and
It is configured to include a turning flow pipe formed to correspond to each of the left and right around the center flow pipe,
The three-dimensional exhaust gas spray injector for ships, characterized in that the orbiting flow pipe is made of a curved line. The method of claim 2,
The cross-sectional area of the gas inlet is smaller than the cross-sectional area of one end of the gas flow pipe connected in the horizontal direction to the gas inlet,
The cross-sectional area of one end of the gas flow pipe is smaller than the cross-sectional area of the center of the gas flow pipe,
The three-dimensional exhaust gas spray injector for ships, characterized in that the cross-sectional area of the center of the gas flow pipe is less than or equal to the cross-sectional area of the other end of the gas flow pipe connected to the gas discharge port. The method of claim 3,
3D exhaust gas spray injector for ships, characterized in that tapered in a direction in which the width increases from one end of the center flow pipe toward the center of the center flow pipe. The method of claim 4,
The three-dimensional exhaust gas spray injector for ships, characterized in that a plurality of the orbiting flow path pipes are arranged radially around the spray nozzle. The method of claim 5,
The gas inlet is a three-dimensional exhaust gas spray injector for ships, characterized in that connected to the exhaust chamber in which the pressurized exhaust gas is accommodated. The method of claim 6,
The three-dimensional exhaust gas spray injector for ships, characterized in that the length-to-diameter ratio of the gas supply pipe is 5:1 to 10:1. The method of claim 7,
A three-dimensional exhaust gas spray injector for ships, characterized in that a perforated plate in which a plurality of through holes are formed is coupled to the spray port of the spray nozzle. The method of claim 8,
The three-dimensional exhaust gas spray injector for ships, characterized in that the gas discharge port of the gas supply pipe is installed at the other end of the center flow pipe.

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