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Marine denitration system and ship provided with same
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A denitrification technology for ships, applied in the denitrification system for ships, in the field of ships, to achieve the effect of suppressing load changes, reducing capacity and size
Inactive Publication Date: 2013-04-03
MITSUBISHI HEAVY IND LTD
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In addition, since liquid ammonia is regarded as dangerous goods, special storage facilities such as leak detection sensors and double piping are required, but if the required amount of ammonia can be produced on board, special storage facilities are not necessary
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no. 1 Embodiment approach
[0071] Regarding the first embodiment of the present invention, the following uses figure 1 Be explained.
[0072] figure 1 A schematic configuration diagram around a diesel engine installed in the denitrification system for ships according to Example 1 of the present invention is shown.
[0073] The ship is equipped with a diesel engine (main engine) 3 for ship propulsion, a ship denitrification system 1 for denitrating the exhaust gas of the diesel engine 3, a hybrid exhaust turbocharger 5 driven by the exhaust gas of the diesel engine 3, and a An exhaust gas preheater (exhaust gas boiler) 11 that generates steam from exhaust gas from the engine 3 .
[0074] The output of the diesel engine 3 is directly or indirectly connected to the screw propeller through the propeller shaft. In addition, the exhaust port of the block portion 13 of each cylinder of the diesel engine 3 is connected to an exhaust manifold 15 as an exhaust gas collecting pipe. The exhaust manifold 15 is c...
no. 2 Embodiment approach
[0117] Such as image 3 As shown, an exhaust turbocharger 5' is provided instead of the hybrid exhaust turbocharger 5 in the first embodiment (refer to figure 1 ). About the turbine part 5a driven by exhaust gas, and the compressor part 5b which compresses air, it is the same as 1st Embodiment.
[0118] The exhaust manifold 15 is connected to the third exhaust pipe L3, and the exhaust gas of the diesel engine 3 is introduced to the inlet side of the power turbine 7 through the third exhaust pipe L3. Thus, part of the exhaust gas of the diesel engine 3 is extracted to be supplied to the power turbine 7 before being supplied to the exhaust turbocharger 5'. The power turbine 7 is rotationally driven by the extracted exhaust gas.
[0119] Exhaust gas discharged from the outlet side of the power turbine 7 is introduced into the second exhaust pipe L2 through the fourth exhaust pipe L4.
[0120] The rotational output of the power turbine 7 is transmitted to the power turbine...
no. 3 Embodiment approach
[0127] Such as Figure 4 As shown, the steam generated by the exhaust gas preheater 11 is supplied to the steam turbine 9 for rotational driving through the first steam pipe J1.
[0128] The exhaust gas discharged from the outlet end of the turbine part 5a of the exhaust turbocharger 5' through the second exhaust pipe L2 and the exhaust gas discharged from the outlet end of the power turbine 7 through the fourth exhaust pipe L4 are introduced into the Exhaust gas preheater 11. The steam generated in the exhaust gas preheater 11 is introduced into the steam turbine 9 through the first steam pipe J1. The steam that has completed the task in the steam turbine 9 is discharged from the second steam pipe J2, and is introduced into a capacitor (condenser) not shown in the figure.
[0129] The power turbine 7 and the steam turbine 9 are connected in series to drive a heterogeneous turbine side generator 50 . That is, in the generator 50 , different types (different types) of tu...
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Abstract
Provided is a marine denitration system capable of stably supplying electric energy required when ammonia is generated as a reducing agent for denitration. A marine denitration system (1) provided with an ammonia generator (2) which comprises a hydrogenproduction unit (81) that produces hydrogen from water and a nitrogenproduction unit (83) that produces nitrogen from air and generates ammonia from the hydrogen manufactured by the hydrogen production unit (81) and the nitrogen produced by the nitrogen production unit (83), and an SCR catalyst unit (4) which is provided in a second exhaust pipe (L2) serving as an exhaust gas passage of a diesel engine (3) for marine propulsion and, together with the ammonia generated by the ammonia generator (2), denitrates exhaust gas, the marine denitration system being provided with a hybrid exhaust turbosupercharger (5) and a storage battery (67), wherein power generation outputs from the hybrid exhaust turbosupercharger (5) and the storage battery are supplied to the ammonia generator (2).
Description
technical field [0001] The present invention relates to a marine denitrification system mounted on a ship, which is suitable for denitrification of diesel engineexhaust gas, and a ship provided with the system. Background technique [0002] In order to remove nitrogen oxides (NOx) generated by diesel engines (main engines) for ship propulsion, ships are equipped with denitrification devices. [0003] Patent Document 1 below discloses an invention that enables generation of ammonia used as a reducing agent of a denitration catalyst on board a ship. Since the ammonia can be produced on board the ship, it is not necessary to transport liquid ammonia to the ship and store it in the ship. In addition, since liquid ammonia is regarded as dangerous goods, special storage facilities such as leak detection sensors and double piping are required, but if the required amount of ammonia can be produced on board the ship, special storage facilities are not necessary. [0004] prior...
Claims
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Application Information
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