KR102259661B1 - Power plant system for a ship - Google Patents

Abstract

The present invention relates to a power system for a ship. In the present invention, an appropriate amount of thermal energy source (eg, heated air, flame, etc.) is selectively turned on or off according to the load of the engine, the use of the engine, etc. ) is additionally arranged to selectively supply a plurality of heaters, and through this, it is suitable for the temperature change of the self-performance performance guarantee on the SCR reactor side (that is, the change in the self-performance guarantee temperature that changes depending on the load of the engine and the purpose of the engine). By inducing various values of thermal energy as well as reducing agents decomposed to an appropriate level to be supplied in a variety of ways, the problem of deterioration of exhaust gas purification performance of the SCR reactor due to the under-supply of thermal energy from the ship operator side, as well as the reduction of thermal energy It can guide to effectively avoid even the problem of unnecessary excessive energy consumption due to oversupply.

Description

Power plant system for a ship

The present invention relates to a power system for a ship, and more particularly, is selectively turned on or off depending on the load of the engine, the use of the engine, etc., and uses an appropriate amount of heat energy source (eg, heated air, flame) to a hydrolysis chamber, SCR reactor, etc. etc.) are additionally arranged, and through this, the SCR reactor side can respond to changes in the self-performance guarantee temperature (that is, the change in the self-performance guarantee temperature that changes depending on the load of the engine, the use of the engine, etc.) By inducing various supply of suitable various values of thermal energy as well as reducing agent decomposed to an appropriate level, the problem of deterioration of exhaust gas purification performance of the SCR reactor due to under-supply of thermal energy from the ship operator side, as well as thermal energy It relates to a power system for ships that can guide so that even unnecessary excessive energy consumption problems caused by the excessive supply of energy can be effectively avoided.

Recently, as regulations on harmful substances emitted from ships, for example, nitrogen oxides (NO _x ) have been further strengthened (for reference, in Tier III, which takes effect in 2016, nitrogen oxide emissions are, for example, 3.4 g/KW or less (rpm less than 130). )), for example, SCR (Selective Catalyst Reduction), various types of hazardous substances reduction devices for ships using technologies such as SCR (Selective Catalyst Reduction) are being widely developed/distributed.

For example, Korean Patent Publication No. 10-2010-132310 (name: SCR system for ships and nitrogen oxide reduction method using urea powder) (published on December 17, 2010), Korean Patent Publication No. 10-2003-127737 ( Name: Clogging prevention device of SCR device using waste heat from ship) (published on January 1, 2013), Korean Patent Laid-Open No. 10-2014-46651 (title: denitration device for large engine for ships) (published on April 21, 2014) ) and the like, the detailed configuration of the harmful substances reduction device for ships according to the prior art is disclosed in more detail.

On the other hand, as shown in FIG. 1, the power system 10 for a ship according to the prior art employing the device for reducing harmful substances for a ship is a ship propulsion engine 11, while being connected to the engine 11, the turbine Turn, the turbo charger 13 (Turbo charger) for supplying external air to the engine 11 side, the scavenge air receiver 12 (Scavenge air receiver) for uniformly relieving the pressure of the external air supplied from the turbocharger 13 side (Scavenge air receiver), the engine Harmful substances contained in the exhaust gas discharged from the engine 11, including the exhaust receiver 14 (Exhaust gas receiver) that uniformly relieves the non-uniform pressure of the exhaust gas discharged from the side (11) For example, an SCR reactor 30 for purifying nitrogen oxides), a reducing agent hydrolysis chamber 22, a reducing agent injector 25, a reducing agent storage tank 28, a water storage tank 27, an air heater 19, The controller 43 and the like take a systematically combined configuration.

At this time, the exhaust gas distribution line 15 connected to the turbocharger 13 serves to discharge the exhaust gas from the engine 11 side that has passed through the turbocharger 13 to the outside, and the exhaust gas distribution line 15 ) and connected to the exhaust gas distribution line 16 side, while taking a structure connected to the SCR reactor 30, the exhaust gas containing nitrogen oxide is moved to the engine 11 side, and the exhaust gas is directed to the SCR reactor 30 side. will play the role of supply.

Under this situation, the SCR reactor 30 side has a structure connected to the turbocharger 13 and the engine 11 via the exhaust gas distribution line 16 as a medium, while the engine 11 side exhaust gas and the reducing agent (eg, , urea) to pass together, and serves to purify harmful substances (eg, nitrogen oxides (NO _{x )) contained in the exhaust gas.}

At this time, the SCR reactor 30 passes the exhaust gas and the reducing agent at the same time, _{and reacts nitrogen oxides (NO x} ) with the reducing agent _{to reduce the nitrogen oxides (NO x} ) to nitrogen and water vapor harmless to living things. (32) and the SCR chamber 31 accommodating the SCR catalyst 32 takes a systematically combined configuration. In this case, as the SCR catalyst 32, for example, zeolite, vanadium, platinum, etc. may be selected, and as the material of the SCR chamber 31, for example, stainless steel may be selected. can

Here, on the reducing agent injector 25 side, the reducing agent including ammonia is injected into the exhaust gas on the engine 11 side introduced into the SCR reactor 30, and the reducing agent (eg, urea) on the reducing agent hydrolysis chamber 22 side. ) is hydrolyzed to produce ammonia, and then serves to supply the reducing agent containing the ammonia to the reducing agent injector 25 side.

In this case, on the reducing agent supply passage 23 side, by interconnecting the reducing agent hydrolysis chamber 22 and the reducing agent injector 25, the <reducing agent containing ammonia> supplied from the reducing agent hydrolysis chamber 22 side is transferred to the reducing agent injector ( 25) to support normal delivery.

Under this situation, the reducing agent storage tank 28 side serves to store the reducing agent (eg, urea) to be supplied to the reducing agent hydrolysis chamber 22 side, and the water storage tank 27 side to the reducing agent hydrolysis chamber 22 side It serves to store water to be supplied.

In this case, by interconnecting the reducing agent storage tank 28 and the reducing agent hydrolysis chamber 22 on the reducing agent supply passage 44 side, the reducing agent stored in the reducing agent storage tank 28 returns to the reducing agent hydrolysis chamber 22 normally. It serves to support the transfer, and on the water supply flow path 29 side, by interconnecting the water storage tank 27 and the reducing agent supply flow path 44, the water stored in the water storage tank 27 is a reducing agent. It serves to support the normal delivery to the hydrolysis chamber 22 (of course, the water supply passage 29 may be directly connected to the reducing agent hydrolysis chamber 22).

At this time, the air heater 19 side generates high-temperature heated air based on fuel and air supplied from the outside while taking a structure connected to the SCR reactor 30 through the heating air distribution line 21 as a medium, By supplying the generated heated air to the SCR reactor 30 through the heated air distribution line 21, the SCR catalyst 32 in the SCR chamber 31 receives high-temperature thermal energy support, and a more effective purifying procedure for harmful substances You will play a supporting role in moving forward.

Under this infrastructure, on the controller 43 side, the sensor 24 disposed on the reducing agent supply flow path 23 , the sensor 26 disposed at the rear end of the SCR reactor 30 , the exhaust gas distribution lines 15 and 16 ) On the valves 17 and 18 disposed on the, the valve 42 disposed on the reducing agent supply flow path 44, the valve 40 disposed on the water supply flow path 29, the heated air distribution line 21 While communicating with the arranged valve 20 and the like, the detection values transmitted from the respective sensors 24 and 26 (eg, the value of harmful substances contained in the purified exhaust gas that has passed through the SCR reactor 30, the hydrolysis of the reducing agent) By opening and closing each valve 17, 18, 42, 40, 20 according to the temperature value of the reducing agent supplied from the chamber, the distribution pattern of the exhaust gas output from the engine 11, the supply/distribution pattern of the reducing agent, It plays a role of appropriately regulating the supply/distribution pattern of heating air (of course, the number, position, shape, etc. of each distribution line, flow path, sensor, valve, etc. described above can be variously modified depending on the situation. have).

On the other hand, under this conventional system, as described above, the air heater 19 side has a structure connected to the SCR reactor 30 via the heated air distribution line 21 as a medium, while the fuel supplied from the outside and By generating high-temperature heated air based on air and supplying the generated heated air to the SCR reactor 30 through the heated air distribution line 21, the SCR catalyst 32 in the SCR chamber 31 generates high-temperature thermal energy. While receiving support, it will play a role of supporting a more effective purifying process for hazardous substances.

Of course, under this conventional system, the SCR reactor 30 changes the self-performance guarantee temperature according to the load of the engine 11 that discharges the exhaust gas to be purified, or the use of the engine 11, so that the SCR reactor It is advantageous that the thermal energy supplied to the side (30) also has various values depending on the load of the engine 11 or the use of the engine 11 .

This is, if the load of the engine 11 is large, the performance performance guarantee temperature of the SCR reactor 30 is also relatively high, and accordingly, even though a higher value of thermal energy must be supplied to the SCR reactor 30 side. , this is because when the low value of thermal energy that cannot be satisfied is uniformly and under-supplied, the ship operator will inevitably suffer serious damage in that the exhaust gas purification performance of the SCR reactor 30 is lowered, and on the contrary, the engine Since the load of (11) is small, the performance guarantee temperature of the SCR reactor 30 is also relatively low, and accordingly, although a lower value of thermal energy must be supplied to the SCR reactor 30 side, a high value of This is because, if thermal energy is uniformly oversupplied, the ship operator has no choice but to bear serious damage caused by excessive consumption of unnecessary energy.

However, despite this situation, in the prior art, the performance performance guarantee temperature of the SCR reactor 30 according to the load of the engine 11, the use of the engine 11, etc. is performed through a single air heater 19 irrespective of the change in temperature. , since thermal energy is monotonically supplied at a fixed value, unless special measures are taken, the exhaust gas purification performance of the SCR reactor 30 due to under-supply of thermal energy according to the situation on the ship operator side, as well as the problem of deterioration In addition, the problem of unnecessary excessive energy consumption caused by the excessive supply of thermal energy had to be endured.

In particular, under the conventional system, the reducing agent injected through the reducing agent injector 25 uses only the thermal energy of the heating air on the air heater 19 side as a predetermined decomposition heat source, without a separate additional heat source, and a series of decomposition procedures Because of this, the SCR reactor 30 had to suffer great difficulties in receiving the reducing agent decomposed to an appropriate level, and in the end, even in this case, the ship operator side suffered from a decrease in the purification performance of the SCR reactor 30. I had no choice but to bear the tangible and intangible damage that followed.

Domestic Patent Publication No. 10-2010-132310 (Name: SCR system for ships and nitrogen oxide reduction method using urea powder) (published on December 17, 2010) Korean Patent Laid-Open Patent No. 10-2003-127737 (Name: Clogging prevention device of SCR device using waste heat of a ship) Domestic Patent Laid-Open Patent No. 10-2014-46651 (Name: Denitration device for large marine engines) (published on April 21, 2014)

Accordingly, an object of the present invention is to selectively supply an appropriate amount of thermal energy source (eg, heated air, flame, etc.) to the hydrolysis chamber, SCR reactor, etc. by selectively turning on or off according to the load of the engine, the use of the engine, etc. By additionally disposing a plurality of heaters that have multiple heaters, the thermal energy of various values in accordance with the change in the self-performance guarantee temperature (that is, the change in the self-performance guarantee temperature change depending on the load of the engine, the use of the engine, etc.) Of course, by inducing the supply of various reducing agents decomposed to an appropriate level, the problem of deterioration of exhaust gas purification performance of the SCR reactor due to undersupply of thermal energy from the ship operator side, as well as unnecessary energy due to excessive supply of thermal energy It is to guide so that even the problem of excessive consumption can be effectively avoided.

Other objects of the present invention will become more apparent from the following detailed description and accompanying drawings.

In the present invention in order to achieve the above object, the hull propulsion engine; a Selective Catalyst Reduction (SCR) reactor for purifying harmful substances contained in the exhaust gas discharged from the engine; a reducing agent hydrolysis chamber for hydrolyzing the reducing agent; a reducing agent injector for injecting the reducing agent hydrolyzed by the reducing agent hydrolysis chamber to the SCR reactor; A plurality of heaters for heating the reducing agent or supplying heating air to the SCR reactor while being connected to the reducing agent hydrolysis chamber or the SCR reactor, wherein the plurality of heaters include the size of the rod of the engine and the SCR reactor Disclosed is a power system for ships, characterized in that relatively more units are operated in proportion to the size of the performance guarantee temperature of the SCR reactor and the required amount of the reducing agent of the SCR reactor.

In the present invention, a plurality of heating that can be selectively turned on or off according to the load of the engine, the use of the engine, etc., and selectively supplying an appropriate amount of thermal energy source (eg, heated air, flame, etc.) to the hydrolysis chamber, SCR reactor, etc. Due to the additional arrangement of the group, under the implementation environment of the present invention, the thermal energy of various values suitable for the self-performance performance guarantee temperature change (that is, the self-performance performance guarantee temperature change depending on the load of the engine, the use of the engine, etc.) on the SCR reactor side is Of course, even the reducing agent decomposed to an appropriate level can be supplied in a variety of ways, and eventually, on the ship operator side, the problem of deterioration of the exhaust gas purification performance of the SCR reactor due to the undersupply of thermal energy, as well as the unnecessary problem of excessive supply of thermal energy Even the problem of excessive energy consumption can be effectively avoided.

1 is an exemplary view conceptually showing a power system for a ship according to the prior art.
Figure 2 is an exemplary view conceptually showing a power system for a ship according to an embodiment of the present invention.
Figure 3 is an exemplary view conceptually showing a power system for a ship according to another embodiment of the present invention.
Figure 4 is an exemplary diagram conceptually showing a power system for a ship according to another embodiment of the present invention.
5 is an exemplary diagram conceptually illustrating a power system for a ship according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, the power system for a ship according to the present invention will be described in more detail as follows.

As shown in Figure 2, the marine power system 100 according to the present invention employing a harmful substance reduction device for ships is a ship propulsion engine 111, while being connected to the engine 111, turning a turbine, the engine ( 111) side of the turbocharger 113 (Turbo charger) that supplies external air, the scavenge air receiver 112 (Scavenge air receiver) that uniformly relieves the pressure of the external air supplied from the turbocharger 113 side, and the engine 111 side Including an exhaust receiver 114 (Exhaust gas receiver) that uniformly relieves the non-uniform pressure of the exhaust gas discharged from the exhaust gas, harmful substances (eg, nitrogen oxides) contained in the exhaust gas discharged from the engine 111 , etc. ) for purifying the SCR reactor 130, the reducing agent hydrolysis chamber 122, the reducing agent injector 125, the reducing agent storage tank 128, the water storage tank 127, the air heater 119, the controller 143. etc. will take a systematically combined configuration.

At this time, the exhaust gas distribution line 115 connected to the turbocharger 113 serves to discharge the exhaust gas from the engine 111 side that has passed through the turbocharger 113 to the outside, and the exhaust gas distribution line 115 ) and the side of the exhaust gas distribution line 116 connected to the SCR reactor 130 while taking a structure connected to the engine 111 side containing nitrogen oxide, the exhaust gas is moved to the SCR reactor 130 side. will play the role of supply.

Under this situation, the SCR reactor 130 side has a structure connected to the turbocharger 113 and the engine 111 via the exhaust gas distribution line 116 as a medium, while the engine 111 side exhaust gas and the reducing agent (eg, , urea) to pass together, and serves to purify harmful substances (eg, nitrogen oxides (NO _{x )) contained in the exhaust gas.}

At this time, the SCR reactor 130 passes the exhaust gas and the reducing agent at the same time, _{and reacts nitrogen oxide (NO x} ) with the reducing agent, thereby reducing the nitrogen oxide (NO _x ) to nitrogen and water vapor harmless to living things. (132) and the SCR chamber 131 for accommodating the SCR catalyst 132 is systematically combined. In this case, as the SCR catalyst 132, for example, zeolite, vanadium, platinum, etc. may be selected, and as the material of the SCR chamber 131, for example, stainless steel may be selected. can

Here, the reducing agent injector 125 side serves to inject the reducing agent including ammonia into the exhaust gas on the engine 111 side flowing into the SCR reactor 130, and the reducing agent hydrolysis chamber 122 side plays the reducing agent (eg, urea) ) is hydrolyzed to produce ammonia, and then serves to supply the reducing agent containing the ammonia to the reducing agent injector 125 side.

In this case, by interconnecting the reducing agent hydrolysis chamber 122 and the reducing agent injector 125 on the reducing agent supply passage 123 side, the <reducing agent containing ammonia> supplied from the reducing agent hydrolysis chamber 122 side is transferred to the reducing agent injector ( 125) to support normal delivery.

Under this situation, the reducing agent storage tank 128 side serves to store the reducing agent (eg, urea) to be supplied to the reducing agent hydrolysis chamber 122 side, and the water storage tank 127 side serves to the reducing agent hydrolysis chamber 122 side. It serves to store water to be supplied.

In this case, by interconnecting the reducing agent storage tank 128 and the reducing agent hydrolysis chamber 122 on the reducing agent supply passage 144 side, the reducing agent stored in the reducing agent storage tank 128 returns to the reducing agent hydrolysis chamber 122 normally. It serves to support the transfer, and on the water supply passage 129 side, by interconnecting the water storage tank 127 and the reducing agent supply passage 144, the water stored in the water storage tank 127 is a reducing agent. It serves to support normal delivery to the hydrolysis chamber 122 (of course, the water supply passage 129 may be directly connected to the reducing agent hydrolysis chamber 122).

Under this infrastructure, on the controller 143 side, the sensor 124 disposed on the reducing agent supply flow path 123 , the sensor 126 disposed at the rear end of the SCR reactor 130 , the exhaust gas distribution lines 115 , 116 ) The valves 117 and 118 disposed on the valve 142 disposed on the reducing agent supply flow path 144, the valve 140 disposed on the water supply flow path 129, the heating air distribution line 121 disposed on the While communicating with the valve 120 and the like, the detection value transmitted from each sensor 124 and 126 side (eg, the value of harmful substances contained in the purified exhaust gas that has passed through the SCR reactor 130, the reducing agent supplied from the hydrolysis chamber By opening and closing each valve 117,118,142,140,120 according to the temperature value of the reducing agent, etc., the exhaust gas distribution pattern output from the engine 111, the reducing agent supply/distribution pattern, the heating air supply/distribution pattern, etc. are appropriately adjusted (Of course, the number, position, shape, etc. of each distribution line, flow path, sensor, valve, etc. described above may be modified in various ways depending on the situation).

On the other hand, even under this system of the present invention, the SCR reactor 130 side varies the self-performance guarantee temperature according to the load of the engine 111 that discharges the exhaust gas to be purified, or the use of the engine 111, It is advantageous that the thermal energy supplied to the SCR reactor 30 also has various values depending on the load of the engine 11 or the use of the engine 11 .

This is, if the load of the engine 111 is large, the performance guarantee temperature of the SCR reactor 130 is also relatively high, and accordingly, even though a higher value of thermal energy must be supplied to the SCR reactor 130 side. , this is because if the low value of thermal energy that cannot be satisfied is uniformly and under-supplied, the ship operator will inevitably suffer serious damage in that the exhaust gas purification performance of the SCR reactor 130 is lowered, and on the contrary, the engine Since the load of 111 is small, the performance performance guarantee temperature of the SCR reactor 130 is also relatively low, and accordingly, although a lower value of thermal energy must be supplied to the SCR reactor 130 side, a high value of This is because, if thermal energy is uniformly oversupplied, the ship operator has no choice but to bear serious damage caused by excessive consumption of unnecessary energy.

Under this sensitive situation, as shown in FIG. 2 , in the present invention, <the load of the engine 111, the use of the engine 111, etc. are selectively turned on or off, the hydrolysis chamber 122, the SCR reactor 130 ) and the like, measures are taken to additionally arrange a plurality of heaters 190 that can selectively supply an appropriate amount of thermal energy source (eg, heating air, flame, etc.). In this case, the plurality of heaters 190 according to the present invention may have the same heating capacity, and may have different heating capacities depending on circumstances.

Under this implementation environment of the present invention, the plurality of heaters 190, 'the load of the engine 111 is relatively low', rather than 'when the load of the engine 111 is small and the performance performance guarantee temperature of the SCR reactor 130 is low'. ', when the performance guarantee temperature of the SCR reactor 130 is relatively higher, a relatively larger number of units are operated.
That is, under the implementation environment of the present invention, the plurality of heaters 190 are in proportion to the size of the rod of the engine 111 and the size of the performance performance guarantee temperature of the SCR reactor 130, in which relatively more units are operated. will have characteristics.
For example, on the ship operator side, the load of the engine 111 is large, and the performance guarantee temperature of the SCR reactor 130 is also relatively high. Accordingly, a high value of thermal energy must be supplied to the SCR reactor 130 side. In this case, measures are taken to operate (ie, turn-on) the heaters 190d, 190e, and 190f (of course, such a heater operation procedure may be made automatically by the control of the controller 143, and the situation Accordingly, it may be done manually by the operator's manual operation) (hereinafter the same).

Of course, under this situation, each heater (190d, 190e, 190f) side generates high-temperature heated air based on fuel and air supplied from the outside, and then sends the generated heated air through the heated air distribution line 121 to the SCR reactor. The process of supplying the joint to the 130 side is performed, and eventually, the SCR catalyst 132 side in the SCR chamber 131 receives high-temperature thermal energy support corresponding to the engine 111 having a large load, and more effective harmful substances You can proceed with the purification process.

As another example, on the ship operator side, for example, the load of the engine 111 is larger, the performance guarantee temperature of the SCR reactor 130 is also relatively higher, and accordingly, a higher value of heat toward the SCR reactor 130 side. When energy is to be supplied, not only the action of starting (ie, turning on) the heaters 190d, 190e, and 190f, but also the additional operation of the heater 190c (ie, turning on) additional measures are taken will do

Of course, under this situation, each heater (190c, 190d, 190e, 190f) side generates high-temperature heated air based on fuel and air supplied from the outside, and then passes the generated heated air through the heated air distribution line 121 The process of federated supply to the SCR reactor 130 is performed, and as a result, the SCR catalyst 132 side in the SCR chamber 131 receives a higher temperature thermal energy support corresponding to the engine 111 having a larger load. , it is possible to proceed with a more effective purifying procedure for hazardous substances.

As another example, since the load of the engine 111 is small on the ship operator side, the performance guarantee temperature of the SCR reactor 130 is also relatively low, and accordingly, a low value of thermal energy is supplied to the SCR reactor 130 side. If necessary, the heater 190f is turned off, and only the heaters 190d and 190e are operated (turned on).

Of course, under this situation, the heaters 190d and 180e side generate heated air based on fuel and air supplied from the outside, and then supply the generated heated air to the SCR reactor 130 through the heated air distribution line 121 . In the end, the SCR catalyst 132 in the SCR chamber 131 receives an appropriate level of thermal energy support corresponding to the engine 111 having a small load, and a more effective purifying process of harmful substances can be performed. there will be

As another example, since the load of the engine 111 is smaller on the ship operator side, the performance guarantee temperature of the SCR reactor 130 is also relatively lowered, and accordingly, the lower value of heat toward the SCR reactor 130 side. When energy is to be supplied, the heaters 190e and 190f are turned off, and only the heater 190d is operated (independently turned on) is taken.

Of course, under this situation, the heater 190d side generates heated air based on fuel and air supplied from the outside, and then supplies the generated heated air to the SCR reactor 130 through the heated air distribution line 121 alone. In the end, the SCR catalyst 132 in the SCR chamber 131 receives an appropriate level of thermal energy support corresponding to the engine 111 having a smaller load, and a more effective purifying procedure can be performed. there will be

As such, in the present invention, it is selectively turned on or off according to the load of the engine 111, the use of the engine 111, etc., and an appropriate amount of thermal energy source (eg, heated air) can be selectively supplied to the SCR reactor 130 side. Since a plurality of heaters 190 are additionally disposed, in the implementation environment of the present invention, the SCR reactor 130 side changes the self-performance performance guarantee temperature (that is, the self-performance performance guarantee temperature that changes depending on the load of the engine, the use of the engine, etc.) change) can be supplied with various values of thermal energy, and eventually, on the ship operator side, the problem of deterioration of the exhaust gas purification performance of the SCR reactor due to the undersupply of thermal energy, as well as the problem of deterioration of the exhaust gas purification performance of the SCR reactor due to the excessive supply of thermal energy Even the problem of unnecessary excessive energy consumption can be effectively avoided.

On the other hand, under the implementation environment of the present invention, the exhaust gas introduced through the exhaust gas distribution line 116, the heated air introduced through the heated air distribution line 121, etc. Thermal energy is fused, and based on this, the reducing agent is decomposed. Of course, under this situation, if no separate action is taken, the reducing agent injected through the reducing agent injector 125 without a separate additional heat source, Using only the thermal energy of the exhaust gas and the thermal energy of the heating air as a predetermined decomposition heat source, it is inevitably subjected to a series of decomposition procedures. As a result, it is difficult for the SCR reactor 130 side to receive the decomposed reducing agent to an appropriate level. may experience

Under this sensitive situation, as shown in FIG. 2 above, in the present invention, a plurality of heaters that can additionally perform a reducing agent decomposition function by acting as a series of reducing agent decomposition heat sources in a part of the reducing agent hydrolysis chamber 122 . (190) will be taken measures to further deploy. Of course, even in this case, the plurality of heaters 190 according to the present invention may have the same heating capacity as each other, and may have different heating capacities depending on circumstances.

At this time, the plurality of heaters 190 according to the present invention, for example, <After generating a high-temperature flame based on the fuel supplied from the outside, the generated flame is supplied to the reducing agent hydrolysis chamber 122 side to heat the reducing agent Method>, it is also possible to additionally perform a series of reducing agent decomposition functions, and as another example, <after generating high-temperature heated air based on fuel and air supplied from the outside, the generated heated air is converted into the reducing agent hydrolysis chamber 122 . It is also possible to additionally perform a series of reducing agent decomposition functions by supplying it to the side and heating the reducing agent>.

Of course, when a plurality of heaters 190 that can additionally perform a reducing agent decomposition function by acting as a series of reducing agent decomposition heat sources are additionally disposed in a part of the reducing agent hydrolysis chamber 122, the mixing chamber 200 On the side of the reducing agent flowing into the furnace, it is pre-decomposed into a state suitable for performing the purification procedure through a dedicated heating procedure by the heater 190, and when thermal energy is supplied in the mixing chamber 200 (that is, heat by exhaust gas and heated air) When energy is supplied), a faster and more effective decomposition pattern can be exhibited.

As such, in the present invention, in a part of the reducing agent hydrolysis chamber 122, it acts as a series of reducing agent decomposition heat sources, and measures to additionally arrange a plurality of heaters 190 that can additionally perform the reducing agent decomposition function. , under the implementation environment of the present invention, on the side of the reducing agent flowing into the mixing chamber 200, it is possible to pre-decompose it in a state suitable for performing the purification procedure through a dedicated heating procedure by a plurality of heaters 190, and eventually, the SCR reactor On the side of (130), it is possible to flexibly proceed with the optimized reduction treatment procedure of harmful substances (eg, nitrogen oxides) while effectively receiving the reducing agent decomposed to the optimum level without any difficulty.

Under this implementation environment of the present invention, the plurality of heaters 190, 'The load of the engine 111 is relatively larger than when the reducing agent required of the SCR reactor 130 is small because the load of the engine 111 is small'. , when the required amount of the reducing agent of the SCR reactor 130 is relatively larger, a relatively larger number of units are operated.
That is, under the implementation environment of the present invention, a plurality of heaters 190, in proportion to the size of the load of the engine 111 and the required amount of the reducing agent of the SCR reactor 130, have a characteristic that relatively more units are operated will be.
For example, on the ship operator side, for example, the load of the engine 111 is large, and the required amount of the reducing agent of the SCR reactor 130 is also relatively large, and accordingly, a large amount of the decomposition reducing agent is supplied to the SCR reactor 130 side. If necessary, measures are taken to operate (ie, turn-on) the plurality of heaters 190a, 190b, and 190c (of course, such a heater operation procedure will also be automatically performed by the control of the controller 143) Also, depending on the situation, it may be done manually by the operator's manual operation) (as follows).

Of course, under this situation, each of the plurality of heaters (190d, 190e, 190f) side generates high-temperature heated air, flame, etc. based on fuel and air supplied from the outside, and then hydrolyzes the generated heated air, flame, etc. with a reducing agent By supplying it to the chamber 122, a procedure of heating / decomposing the reducing agent is performed, and as a result, a large amount of decomposition reducing agent corresponding to the engine 111 having a large load on the SCR catalyst 132 side in the SCR chamber 131 , and more effective purifying procedures for hazardous substances will be possible.

As another example, on the ship operator side, for example, the load of the engine 111 is small, the required amount of the reducing agent of the SCR reactor 130 is also relatively small, and accordingly, a small amount of the decomposition reducing agent must be supplied to the SCR reactor 130 side. In this case, in the state in which the heaters 190a and 190b are turned off, measures are taken to operate (turn on) only the heater 190c.

Of course, under this situation, on the heater 190c side, high-temperature heated air, flame, etc. are independently generated based on the fuel and air supplied from the outside, and then the generated heated air, flame, etc. is alone in the reducing agent hydrolysis chamber 122 By supplying it, the procedure of heating / decomposing the reducing agent alone is performed, and as a result, the SCR catalyst 132 side in the SCR chamber 131 receives a small amount of the decomposition reducing agent corresponding to the engine 111 having a small load. It will be possible to proceed with a more effective purifying process of hazardous substances.

On the other hand, under the system of the present invention, the exhaust gas introduced through the exhaust gas distribution line 116, the reducing agent injected through the reducing agent injector 125, the heated air flowing through the heated air distribution line 121, etc. are SCR They gather at the inlet (I) of the reactor 130 to show a pattern flowing into the SCR catalyst 132 side.

Of course, under this situation, before the exhaust gas, the reducing agent, the heating air, etc. flow into the SCR reactor 130, the heat energy of the exhaust gas, the heat energy of the heating air, etc. Based on the thermal energy, the procedure for properly decomposing the reducing agent acts as a very important variable in determining the purification performance of the overall SCR reactor 130 .

This is, if the thermal energy of the exhaust gas and the thermal energy of the heated air are not properly fused, an appropriate level of temperature rise cannot be achieved between them, and as a result, the decomposition of the reducing agent is also not performed properly. In this case, the SCR reactor 130 side does not receive any supply of thermal energy to satisfy the self-performance performance guarantee temperature, as well as the reducing agent decomposed to an appropriate level, and eventually, the reduction of harmful substances (eg, nitrogen oxides) This is because it will inevitably lead to great difficulties in proceeding with the processing procedure.

Under this sensitive situation, as shown in FIG. 3, in the present invention, at the inlet (I) of the SCR reactor 130 into which exhaust gas, reducing agent, heated air, etc. are introduced, <thermal energy fusion of exhaust gas and heated air is performed Measures to additionally arrange a mixing chamber 200> that can define a series of thermal energy fusion spaces for

Of course, under the arrangement of the mixing chamber 200 , the exhaust gas introduced through the exhaust gas distribution line 116 , the heated air introduced through the heated air distribution line 121 , etc. flows into the SCR reactor 130 . In the past, it is possible to effectively provide a favorable spatial environment that can properly fuse the heat energy of each person, and in the end, without much difficulty, while fusing/exchanging each other's heat energy, it is easy to raise the temperature to an appropriate level. be able to achieve

Naturally, through the fusion space of the above-described mixing chamber 200, the thermal energy of the exhaust gas, the thermal energy of the heated air, etc. are properly fused, and as a result, an appropriate level of temperature rise between the exhaust gas and the heated air When this is made, the reducing agent injected through the reducing agent injector 125 undergoes an effective decomposition process without any particular difficulty, and under the high temperature environment provided by them, it is eventually introduced into the SCR catalyst 132. In , it is possible to achieve the most suitable chemical state for performing the function of the corresponding SCR catalyst (130).

As described above, in the present invention, at the inlet (I) of the SCR reactor 130 into which exhaust gas, reducing agent, heating air, etc. are introduced, <a series of thermal energy fusion spaces for thermal energy fusion of exhaust gas and heating air are defined. Since the mixing chamber 200> that can be additionally disposed, under the implementation environment of the present invention, on the exhaust gas and heated air side, based on the fusion space on the mixing chamber 200 side, each thermal energy is uniformly fused to an appropriate level As the temperature rises, even the reducing agent can be effectively decomposed, and eventually, on the SCR reactor 130 side, the reducing agent decomposed to an appropriate level as well as supporting thermal energy to satisfy the self-performance performance guarantee temperature without any difficulty. It is possible to flexibly proceed with the optimized reduction treatment procedure for harmful substances (eg, nitrogen oxides) while effectively receiving even

On the other hand, as described above, under the implementation environment of the present invention, the exhaust gas introduced through the exhaust gas distribution line 116, the heated air introduced through the heated air distribution line 121, etc. flow into the SCR reactor 130. Before entering, the respective thermal energy is fused through the mixing chamber 200 side fusion space. Of course, under this situation, in addition to the heating air side thermal energy, a separate thermal energy (or a separate thermal energy that can be supplied) of the medium) is additionally supplied into the mixing chamber 200, the SCR reactor 130 side, not only can more effectively support the satisfaction of the self-performance performance guarantee temperature, but also more effectively provide the reducing agent with more decomposition. will be able to receive

Under such a sensitive situation, as shown in FIG. 4 , in another embodiment of the present invention, between the exhaust receiver 114 and the mixing chamber 200, while connecting the exhaust receiver 114 and the mixing chamber 200, exhaust The first receiver exhaust gas supply line 150> capable of additionally supplying the exhaust gas discharged from the receiver 114 to the mixing chamber 200 is taken.

In this case, the first receiver exhaust gas supply line 150 has a receiver exhaust gas blower 152 that blows and supplies the exhaust gas discharged from the exhaust receiver 114 toward the mixing chamber 200 while being controlled by the controller 143 . , while being controlled by the controller 143, the valve 151 for controlling the flow rate of the exhaust gas flowing through the first receiver exhaust gas supply line 150, while being controlled by the controller 143, the first receiver exhaust gas supply line Receiver exhaust gas flow meter 153 for detecting the flow rate of exhaust gas flowing through 150, while being controlled by the controller 143, a sensor for detecting the temperature of exhaust gas flowing through the first receiver exhaust gas supply line 150 ( 154) may be further disposed.

Of course, through the above-described procedure, <the first receiver exhaust gas supply line 150 capable of additionally supplying the exhaust gas discharged from the exhaust receiver 114 to the mixing chamber 200> is the exhaust receiver 114 and the mixing chamber Under the circumstances where it is additionally disposed between 200, the exhaust gas introduced through the exhaust gas distribution line 116 toward the mixing chamber 200 disposed at the inlet I of the SCR reactor 130, the heated air distribution line ( 121), together with the exhaust gas discharged from the exhaust receiver 114, are supplied/fused at once, and eventually, the SCR reactor 130 side can more effectively support the satisfaction of the self-performance performance guarantee temperature. Not only that, it is possible to receive even a reducing agent whose decomposition has been made more effectively.

In particular, since the exhaust gas discharged from the exhaust receiver 114 does not pass through the turbocharger 113 and has a very high temperature, under the other implementation environment of the present invention, there is no particular difficulty on the side of the ship operator, and the mixing chamber (200) It is possible to effectively maximize the size of the internal thermal energy, or the internal thermal energy of the SCR reactor (130).

On the other hand, as described above, under the implementation environment of the present invention, the plurality of heaters 190 side is connected to the reducing agent hydrolysis chamber 122 or the SCR reactor 130 while heating the reducing agent or supplying heating air. will perform

Of course, under this situation, the heater 190 performs a net function of supplying thermal energy, but on the other hand, it also exhibits an unnecessary disadvantage of consuming fuel and increasing the overall system operating cost.

Under this sensitive situation, as shown in FIG. 5 , in another embodiment of the present invention, between the exhaust receiver 114 and each heater 190, while connecting the exhaust receiver 114 and each heater 190, The second receiver exhaust gas supply line 163> capable of additionally supplying the exhaust gas discharged from the exhaust receiver 114 to each heater 190 will be taken measures to additionally arrange.

In this case, the receiver exhaust gas blower 160 that blows the exhaust gas discharged from the exhaust receiver 114 toward each heater 190 side while being controlled by the controller 143 to the second receiver exhaust gas supply line 163 . , while being controlled by the controller 143, the valve 164 for controlling the flow rate of the exhaust gas flowing through the second receiver exhaust gas supply line 163, while being controlled by the controller 143, flows into each heater 190 side A receiver exhaust gas flow meter 161 that detects the flow rate of exhaust gas flowing through the second receiver exhaust gas supply line 163 while being controlled by a valve 185 for controlling the inflow of exhaust gas, a controller 143, While being controlled by the controller 143, a sensor 162 for sensing the temperature of the exhaust gas flowing through the second receiver exhaust gas supply line 163 may be additionally disposed.

Of course, through the above procedure, <the second receiver exhaust gas supply line 163 capable of additionally supplying the exhaust gas discharged from the exhaust receiver 114 to each heater 190> is the exhaust receiver 114 and each heater Under the circumstances in which it is additionally disposed between the 190, each heater 190 side can be additionally supplied with high-temperature exhaust gas in addition to fuel, and eventually, with only a small amount of fuel consumption, a series of heated air / flame generation procedures and The heating air/flame supply procedure can be performed normally without any problems.

In particular, as mentioned above, since the exhaust gas discharged from the exhaust receiver 114 does not go through the turbocharger 113 and its temperature is very high, under another implementation environment of the present invention, the ship operator The side can easily increase the temperature inside each heater 190 only with the corresponding exhaust gas, while effectively minimizing unnecessary fuel consumption.

The present invention exhibits a useful effect in general in various fields requiring the adoption of an engine.

And, although specific embodiments of the present invention have been described and illustrated above, it is obvious that the present invention may be practiced with various modifications by those skilled in the art.

Such modified embodiments should not be individually understood from the technical spirit or point of view of the present invention, and such modified embodiments should fall within the scope of the appended claims of the present invention.

I: Inlet of SCR reactor
10,100: Power system for ships
11,111: engine
12,112: scavenging receiver
13,113: turbocharger
14,114: exhaust receiver
15,16,115,116: exhaust gas distribution line
17,18,20,40,42,45,117,118,120,140,142,145,151,164,165: valve
24,26,124,126,154,162: sensor
19: air heater
21,121: heated air distribution line
22,122: reducing agent hydrolysis chamber
23,123: reducing agent supply flow path
25,125: reducing agent sprayer
27,127: water storage tank
28,128: reducing agent storage tank
29,129: water supply flow path
30,130: SCR reactor
31,131: SCR chamber
32,132: SCR catalyst
43,143: controller
150: first receiver exhaust gas supply line
152,160: receiver exhaust gas blower
153,161: receiver exhaust gas flow meter
163: second receiver exhaust gas supply line
190: burner
200: mixing chamber

Claims (6)

an engine for hull propulsion;
a Selective Catalyst Reduction (SCR) reactor for purifying harmful substances contained in the exhaust gas discharged from the engine;
a reducing agent hydrolysis chamber for hydrolyzing the reducing agent;
a reducing agent injector for injecting the reducing agent hydrolyzed by the reducing agent hydrolysis chamber to the SCR reactor;
It includes a plurality of heaters connected to the reducing agent hydrolysis chamber or the SCR reactor, heating the reducing agent, or supplying heating air to the SCR reactor,
The plurality of heaters,
In proportion to the size of the load of the engine, the size of the performance guarantee temperature of the SCR reactor, and the required amount of the reducing agent of the SCR reactor, a relatively larger number of units are operated. The power system for a ship according to claim 1, wherein the plurality of heaters have the same heating capacity. The power system for a ship according to claim 1, wherein the plurality of heaters have different heating capacities from each other. [Claim 2] The method of claim 1, wherein a mixing chamber defining a space for thermal energy fusion of the exhaust gas and the heating air is further disposed at the inlet of the SCR reactor into which the exhaust gas, the reducing agent, and the heating air are introduced. Power system for ships. 5. The apparatus of claim 4, further comprising: an exhaust receiver for equalizing the pressure of exhaust gas discharged from the engine;
While connecting the exhaust receiver and the mixing chamber, the marine power system further comprising a first receiver exhaust gas supply line for supplying the exhaust gas discharged from the exhaust receiver to the mixing chamber. According to claim 1, An exhaust receiver (Exhaust gas receiver) for equalizing the pressure of the exhaust gas discharged from the engine;
While connecting the exhaust receiver and each heater, the marine power system further comprises a second receiver exhaust gas supply line for supplying the exhaust gas discharged from the exhaust receiver to each heater.

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