Scrubber system having hydroelectric power generation unit using exhaust gas cleaning water

Abstract

The present invention relates to a scrubber system having a hydroelectric power generation unit using exhaust gas cleaning water, the scrubber system generating electrical power via turbine by using the head of cleaning water used in a scrubber and supplying to places of need. The scrubber system having a hydroelectric power generation unit using exhaust gas cleaning water according to the present invention comprises: a scrubber; a seawater supply unit; a cooling unit; a water treatment unit; a hydroelectric power generation unit; and a monitoring unit.

Description

Scrubber system equipped with exhaust gas cleaning water hydroelectric power generation unit

[0001] The present invention relates to a scrubber system having an exhaust gas scrubber water hydroelectric power generation unit that can generate electricity by using the head difference of scrubber water used in the scrubber to generate turbine power and supply it to a required location.

[0002] Typically, ships are equipped with a main engine that drives the propeller to propel the ship, a number of auxiliary engines for power generation to supply power to various equipment and fixtures on board the ship, and a number of heat generating engines such as boilers.

[0003] Meanwhile, ships are equipped with multiple cooling devices to cool each engine, and these cooling devices are configured to use seawater as coolant, draw up seawater from the sea, use it, and then re-discharge it. The exhaust gas emitted after combustion from the diesel engines of these ships contains numerous air pollutants such as suspended particulate matter, such as dust and fine dust, nitrogen oxides (NOx), and sulfur oxides (SOx), making them a major cause of environmental pollution.

[0004] Accordingly, in order to remove harmful substances contained in such exhaust gases, ships are required to install and operate selective catalytic reduction (SCR) devices to remove nitrogen oxides, scrubbers (SOx removal) to reduce sulfur oxides, and diesel particulate filters (DPF) to remove particulate matter in the engine exhaust lines.

[0005] In particular, the scrubber device uses seawater to remove sulfur oxides (SO) contained in exhaust gas. X) is dissolved to remove dust such as soot, and seawater that reacts with exhaust gas is discharged through a cleaning water pipe and passes through seawater monitoring equipment before being discharged overboard.

[0006] Therefore, a technology is required to increase the utilization of cleaning water by generating additional electricity through turbine generation using cleaning water used in scrubber devices.

[0007] (Patent Document 1) Korean Patent Publication No. 10-1940954 (Seawater circulation system equipped with a seawater supply function and a seawater stirring function for cooling a heating element and an exhaust gas treatment device, January 21, 2019)

[0008] (Patent Document 2) Korean Patent Publication No. 10-2221283 (Seawater Linkage System for Ship Cooling Device and Scrubber, March 2, 2021)

[0009] The technical problem to be achieved by the present invention is to provide a scrubber system having an exhaust gas scrubber water hydroelectric power generation unit that can generate electricity by using the head difference of scrubber water used in the scrubber and supply it to a necessary place.

[0010] An embodiment of the present invention comprises: a scrubber comprising: a scrubber case panel installed on a side of a stack that discharges exhaust gas from an engine of a ship to the outside; a seawater injection module that sprays seawater into the exhaust gas flowing in through a branch of the scrubber case panel to cool the exhaust gas and dissolve sulfur oxides; and an outlet formed on a bottom surface of the scrubber case panel to discharge cleaning water that has cleaned the exhaust gas; a seawater supply unit comprising: a seawater pump that pumps seawater from outside the ship through a seachest and supplies it to the seawater injection module; and a seawater control valve that controls the amount of seawater supplied through a seawater supply pipe connected from the seawater pump to the seawater injection module to control the amount of sprayed seawater; a cooling unit that supplies and recovers cooling water to cool the engine; a water treatment unit that mixes cooling water supplied from the cooling unit into cleaning water of a cleaning water discharge pipe connected to the discharge port of the scrubber to treat the water and discharges the water overboard; A scrubber system is provided having an exhaust gas cleaning water hydroelectric power generation unit, including a hydroelectric power generation unit formed in the cleaning water discharge pipe at the rear end of the water treatment unit and generating electricity by the difference in the drop of cleaning water falling from the scrubber through the cleaning water discharge pipe, directly or by charging a battery to supply the electricity generated to the seawater supply unit, the cooling unit, or the water treatment unit; and a monitoring unit that controls the seawater supply unit, the cooling unit, and the water treatment unit, monitors the loads of the seawater supply unit, the cooling unit, and the water treatment unit, and the amount of electricity generated by the hydroelectric power generation unit, and distributes the amount of electricity generated according to the load.

[0011] Here, the hydroelectric power generation unit may be composed of a turbine cover having an inlet and an outlet respectively formed to communicate with the washing water discharge pipe, a turbine that is rotatably coupled to the turbine cover and rotates by washing water that flows in through the inlet, falls, and is discharged through the outlet, and a power generation module that produces electricity by a coil and a permanent magnet formed at the rear end of a shaft of the turbine.

[0012] In addition, the turbine may include blades coupled to the shaft, blades formed on the outer surface of a rotating frame that rotates in a cylindrical rotating space formed on the inside of the turbine cover, or screw-type blades that are introduced into a rotating guide tube coupled between the inlet and the outlet and rotate.

[0013] In addition, the washing water discharge pipe includes a vertical pipe formed upright through a deck of two or more floors, and the turbine can be coupled to the end of the vertical pipe.

[0014] In addition, the water treatment unit further includes a cleaning water branch pipe branching from the cleaning water discharge pipe at the rear end, and an auxiliary water treatment unit coupled to the cleaning water branch pipe, and the monitoring unit can discharge the cleaning water overboard by bypassing the hydroelectric power generation unit through the cleaning water branch pipe according to the respective loads of the seawater supply unit, the cooling unit, and the water treatment unit.

[0015] Additionally, the hydroelectric power generation unit may be placed on the lowest deck of the hull.

[0016] Additionally, the turbine of the hydroelectric power generation unit can replace the function of the agitator of the water treatment unit.

[0017] According to the present invention, there is an effect that can generate electricity by using the difference in water level of the cleaning water used in the scrubber to generate turbine power and supply it to where it is needed.

[0018] FIG. 1 is a diagram illustrating a configuration of a scrubber system having an exhaust gas cleaning water hydroelectric power generation unit according to an embodiment of the present invention.

[0019] Figures 2 and 3 illustrate implementation diagrams of a scrubber system having the exhaust gas cleaning water hydroelectric power generation unit of Figure 1.

[0020] Figures 4 and 5 illustrate the hydraulic power generation unit of Figure 2 separately.

[0021] <Explanation of symbols>

[0022] 110: Scrubber 111: Scrubber case panel

[0023] 120: Seawater supply 121: Sea chest

[0024] 122: Seawater pump 123: Seawater supply pipe

[0025] 124: Seawater control valve 130: Cooling unit

[0026] 140: Water treatment unit 141: Washing water discharge pipe

[0027] 143: Seawater pump

[0028] 150: Hydroelectric power generation unit 151: Turbine cover

[0029] 152: Shaft 153: Power generation module

[0030] 160: Monitoring unit 171: Washing water branch pipe

[0031] 172: Auxiliary water treatment unit 181: Storage tank

[0032] Hereinafter, an embodiment of the present invention having the above-described features will be described in more detail with reference to the attached drawings.

[0033] A scrubber system having an exhaust gas cleaning water hydroelectric power generation unit according to an embodiment of the present invention includes a scrubber (110) that sprays seawater to clean exhaust gas of a ship, a seawater supply unit (120) that introduces seawater through a sea chest and supplies it to the scrubber (110), a cooling unit (130) that cools an engine with cooling water, a water treatment unit (140) that treats cleaning water that has cleaned exhaust gas so that it can be discharged overboard, a hydroelectric power generation unit (150) that generates electricity by generating electricity by the drop of cleaning water falling from the scrubber (110), and a monitoring unit (160) that controls the seawater supply unit (120), the cooling unit (130), and the water treatment unit (140), monitors the load of each of the seawater supply unit (120), the cooling unit (130), and the water treatment unit (140) and the amount of power generated by the hydroelectric power generation unit (150), and distributes the amount of power generated according to the load, thereby generating electricity by the turbine by the drop of the cleaning water. The idea is to rotate it to generate additional power and utilize it.

[0034] Hereinafter, with reference to FIGS. 1 to 5, a scrubber system having an exhaust gas cleaning water hydroelectric power generation unit of the aforementioned configuration will be described in detail as follows.

[0035] First, the scrubber (110), referring to FIGS. 1 and 2, is installed on the upper side of a stack (not shown) that discharges exhaust gas discharged from a ship's engine (not shown), such as a main engine or a power generation engine, to the outside, and forms an exterior, and a scrubber case panel (111), which sprays seawater on the exhaust gas flowing into the scrubber case panel (111) from an exhaust pipe (11) connected to the engine to cool the exhaust gas to a certain temperature or lower, and removes sulfur oxides (SO). X ) and remove dust such as soot, and an outlet formed on the bottom surface of the scrubber case panel (111) and connected to a cleaning water discharge pipe (141) to discharge cleaning water that has cleaned the exhaust gas.

[0036] Next, the seawater supply unit (120), referring to FIGS. 1 to 3, is composed of a seawater pump (122) that pumps seawater from outside the ship through a sea chest (121) and supplies it to a seawater injection module, and a seawater control valve (124) that controls the amount of seawater supplied through a seawater supply pipe (123) connected from the seawater pump (122) to the seawater injection module, thereby controlling the amount of injection by the seawater injection module.

[0037] For reference, depending on the depth of the water when the ship is at berthing or sailing, the seawater can be selectively supplied from the high sea chest that sucks in the upper seawater or the low sea chest that sucks in the lower seawater by the seawater pump (122). That is, when the ship is at berthing, the high sea chest can be used because the upper seawater is cleaner than the lower seawater, and when the ship is sailing, the lower seawater is cleaner than the upper seawater, so the low sea chest can be used.

[0038] Here, the seawater pump (122) may be a quenching seawater pump, and the seawater control valve (124) may be a manually operated diaphragm valve or solenoid type valve that controls the flow rate of seawater, and may also control the amount of seawater sprayed through the seawater spray module according to the amount of exhaust gas.

[0039] For example, the amount of seawater sprayed can be controlled by selectively operating the seawater pump (122) or the seawater control valve (124) depending on the amount of exhaust gas flowing into the scrubber (110), thereby optimizing power consumption.

[0040] Next, the cooling unit (cooler) (130), referring to FIGS. 1 to 3, supplies and recovers cooling water, such as seawater, to cool the engine. For example, the cooling unit (130) may be a low temperature cooler (LT cooler) (see FIG. 3), and may cool the engine and reuse the discarded seawater in the water treatment unit (140). FIG. 3 illustrates an example in which an LT cooler is used as the cooling unit (130).

[0041] Next, the water treatment unit (140) is configured to treat the wash water to meet the overboard discharge standards of the wash water. Referring to FIGS. 1 to 3, the cooled seawater supplied by branching from the cooling unit (130) to the wash water of the wash water discharge pipe (141) connected to the discharge port of the scrubber (110) is agitated by an agitator to treat the water, and is then temporarily stored in a temporary storage tank (not shown) or discharged overboard in accordance with the IMO discharge standards.

[0042] Next, the hydroelectric power generation unit (150) is configured to generate electricity by generating hydroelectric power using the drop of the cleaning water falling through the cleaning water discharge pipe (141). Referring to FIGS. 1 to 3, as mentioned above, the scrubber (110) is installed on the side of the upper part of the chimney, and the hydroelectric power generation unit (150) is arranged on the lowest deck of the ship or the deck where the engine room is arranged, so that the turbine can be rotated by the drop of the cleaning water flowing through the cleaning water discharge pipe (141) connected from the scrubber (110) to the hydroelectric power generation unit (150), thereby generating electricity.

[0043] That is, as illustrated in FIGS. 3 and 4, the washing water discharge pipe (141) can be configured to maintain a certain flow rate or higher required for power generation by including a vertical pipe formed vertically by penetrating a deck of two or more floors, and the turbine of the hydroelectric power generation unit (150) can be coupled to the end of the vertical pipe.

[0044] For example, a hydroelectric power generation unit (150) is formed in a washing water discharge pipe (141) at the rear end of a water treatment unit (140), so that corrosive substances such as sulfur oxides, dust or fine dust contained in the washing water are diluted by seawater to rotate a turbine, thereby minimizing corrosion of the turbine or adhesion of pollutants, and the amount of power generated by hydroelectric power generation by the drop of washing water falling through the washing water discharge pipe (141) from the scrubber (110) is supplied directly or by charging a battery to a seawater supply unit (120), a cooling unit (130) or a water treatment unit (140), thereby reducing the amount of power supplied by the power generation engine and minimizing greenhouse gas emissions.

[0045] Specifically, referring to FIGS. 4 and 5, the hydroelectric power generation unit (150) may be composed of a turbine cover (151) having an inlet and an outlet formed therein so as to be in communication with a cleaning water discharge pipe (141), a turbine that is rotatably coupled to the turbine cover (151) and rotates by cleaning water that flows in through the inlet, falls, and is discharged through the outlet, and a power generation module (153) that generates electricity by a coil and a permanent magnet formed at the rear end of a shaft (152) of the turbine.

[0046] The hydroelectric power generation unit illustrated in Fig. 5 is a hydroelectric power generation unit with an agitator function, which mixes and agitates cold water coming from an LT cooler (130) and cleaning water from a cleaning discharge pipe (agitator) and simultaneously generates hydroelectric power. That is, the hydroelectric power generation unit with an agitator function may have a shape of a water turbine power generation unit as illustrated in Fig. 5, but is not limited thereto.

[0047] As illustrated in FIG. 5, the turbine may include a blade (154a) coupled to a shaft (152) (see (a) of FIG. 5), a blade (154c) formed on an outer surface of a rotating frame (154b) that rotates in a cylindrical rotating space formed on the inside of a turbine cover (151) (see (b) of FIG. 5), or a screw-type blade (154e) that is inserted in an upright state into a rotating guide tube (154d) coupled between an inlet and an outlet and rotates (see (c) of FIG. 5).

[0048] In addition, as shown in (d) of Fig. 5, the blade (154f) formed inside the turbine cover has a cylindrical structure and rotates by receiving the force generated when the cleaning water flows through the cleaning water discharge pipe (141), and the blade axis is connected to the generator axis, so that the rotational motion of the turbine is converted into electrical energy to produce electricity. The turbine cover (151) refers to an outer shape that protects the mechanical components related to the turbine blade (154f) and plays a role in guiding water to pass through the turbine at a certain pressure.

[0049] Additionally, the blades listed above may be made of an aluminum alloy material having good oxidation resistance or corrosion resistance, or the surface of the blade may be coated with an aluminum-zinc alloy.

[0050] In addition, although not shown, when the blade rotates, seawater supplied from the cooling unit (130), purified water treated by the water treatment unit (140), or separate clean water may be sprayed toward the blade to further dilute the cleaning water and add rotational force, thereby minimizing corrosion of the blade.

[0051] In addition, referring to FIG. 1, the cleaning water discharged from the scrubber (110) can be temporarily stored in a storage tank (181) to a certain capacity, and even when the main engine or power generation engine is not in operation at the time of docking, the turbine can be operated by utilizing the drop of the cleaning water in the storage tank (181).

[0052] Meanwhile, the water treatment unit (140) and the hydroelectric power generation unit (150) may be configured separately, but only the hydroelectric power generation unit (150) may be provided, so that the turbine of the hydroelectric power generation unit (150) replaces the function of the agitator of the water treatment unit (140), thereby generating electricity using only the turbine of the hydroelectric power generation unit (150) and mixing seawater and cleaning water to perform water treatment.

[0053] Next, the monitoring unit (160) controls the seawater supply unit (120), the cooling unit (130), and the water treatment unit (140), monitors the loads of the seawater pump (122) of the seawater supply unit (120), the cooling unit (130), and the water treatment unit (140), and the amount of power generated by the hydroelectric power generation unit (150), and distributes and supplies the amount of power generated according to the loads of the seawater pump (122) of the seawater supply unit (120), the cooling unit (130), and the water treatment unit (140), thereby supplementing the power supply by the power generation engine.

[0054] Meanwhile, referring to FIGS. 1 to 3, the water treatment unit (140) further includes a cleaning water branch pipe (171) branching from a cleaning water discharge pipe (141) at the rear end, and an auxiliary water treatment unit (172) coupled to the cleaning water branch pipe (171), and the monitoring unit (160) may discharge the cleaning water overboard by bypassing the hydroelectric power generation unit (150) through the cleaning water branch pipe (171) according to the respective loads of the seawater supply unit (120), the cooling unit (130), and the water treatment unit (140), so that the cleaning water may be bypassed when power generation by the hydroelectric power generation unit (150) is unnecessary.

[0055] Therefore, by configuring a scrubber system having an exhaust gas cleaning water hydroelectric power generation unit as described above, it is possible to generate electricity by using the head difference of the cleaning water used in the scrubber to generate turbine power and supply it to where it is needed.

[0056] The embodiments described in this specification and the configurations illustrated in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that there may be various equivalents and modified examples that can replace them at the time of filing this application.

Claims

1. A scrubber comprising: a scrubber case panel installed on the side of a stack that discharges exhaust gas from a ship's engine to the outside; a seawater injection module that sprays seawater onto the exhaust gas flowing into the scrubber case panel to cool the exhaust gas and dissolve sulfur oxides; and an outlet formed on the bottom of the scrubber case panel to discharge cleaning water that has cleaned the exhaust gas; A seawater supply unit comprising a seawater pump that pumps seawater from outside through a sea chest and supplies it to the seawater injection module, and a seawater control valve that controls the amount of seawater supplied through a seawater supply pipe connected from the seawater pump to the seawater injection module and thereby controls the amount of injection of the seawater injection module; A cooling unit for supplying and recovering cooling water to cool the engine; A water treatment unit that treats the cooling water supplied from the cooling unit by mixing it with the cleaning water of the cleaning water discharge pipe connected to the discharge port of the above scrubber and discharges it overboard; A hydroelectric power generation unit formed in the washing water discharge pipe at the rear end of the water treatment unit, and which generates power by means of a difference in the falling water of the washing water falling from the scrubber through the washing water discharge pipe, and supplies the generated power directly or by charging the battery to the seawater supply unit, the cooling unit or the water treatment unit; and A monitoring unit that controls the seawater supply unit, the cooling unit, and the water treatment unit, monitors each load of the seawater supply unit, the cooling unit, and the water treatment unit and the amount of power generated by the hydroelectric power generation unit, and distributes the amount of power generated according to the load; A scrubber system having an exhaust gas cleaning water hydroelectric power generation unit.

2. In paragraph 1, The above hydroelectric power generation unit is characterized by comprising a turbine cover having an inlet and an outlet respectively formed to communicate with the cleaning water discharge pipe, a turbine that is rotatably coupled to the turbine cover and rotates by the cleaning water that flows in through the inlet, falls, and is discharged through the outlet, and a power generation module that produces electricity by a coil and a permanent magnet formed at the rear end of the shaft of the turbine. A scrubber system having an exhaust gas cleaning water hydroelectric power generation unit.

3. In paragraph 2, The turbine is characterized in that it includes a blade coupled to the shaft, or a blade formed on the outer surface of a rotating frame that rotates in a cylindrical rotating space formed on the inside of the turbine cover, or a screw-type blade that is introduced into a rotating guide tube coupled between the inlet and the outlet and rotates. A scrubber system having an exhaust gas cleaning water hydroelectric power generation unit.

4. In paragraph 3, The above washing water discharge pipe includes a vertical pipe formed vertically by penetrating a deck of two or more floors, and the turbine is characterized in that it is coupled to the end of the vertical pipe. A scrubber system having an exhaust gas cleaning water hydroelectric power generation unit.

5. In paragraph 1, It further includes a washing water branch pipe branching from the washing water discharge pipe at the rear end of the water treatment unit, and an auxiliary water treatment unit coupled to the washing water branch pipe. The monitoring unit is characterized in that it discharges the cleaning water overboard by bypassing the hydroelectric power generation unit through the cleaning water branch pipe according to the respective loads of the seawater supply unit, the cooling unit, and the water treatment unit. A scrubber system having an exhaust gas cleaning water hydroelectric power generation unit.

6. In paragraph 1, The above hydroelectric power generation unit is characterized in that it is placed on the lowest deck of the hull. A scrubber system having an exhaust gas cleaning water hydroelectric power generation unit.

7. In paragraph 1, Characterized in that the turbine of the hydroelectric power generation unit replaces the function of the agitator of the water treatment unit. A scrubber system having an exhaust gas cleaning water hydroelectric power generation unit.

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