KR101230857B1 - Control system of hardness of water for ship - Google Patents

Abstract

According to an aspect of the invention, the first branch line branched from the fresh water supply line; Hardness control unit comprising a first reaction tank for dissolving carbon dioxide in fresh water and a second reaction tank for dissolving a hardener in fresh water in which carbon dioxide is dissolved by hardening freshwater supplied from the first branch line. ; Hardness injection unit for injecting a hardness agent into the hardness control unit; A second branch line for joining the hardened fresh water to the fresh water supply line in the hardness control unit; A sensor unit provided at a rear end of the second branch line and measuring at least one of hardness and acidity of fresh water flowing through the rear end of the second branch line; And based on the measured value of the sensor unit, a control unit for adjusting the input amount of the hardener is provided.

Description

Control system of hardness of water for ship}

The present invention relates to a water hardening system, and more particularly, to a water hardening system for a ship installed in a fresh water supply line of a ship to control the hardness of fresh water.

In general, the hardness of water is an indicator of the amount of minerals such as calcium and magnesium in water, and the amount of minerals in water is reduced to the amount of calcium oxide and oxidized to 100 mL of water. When 1 mg of calcium is contained, it is defined as hardness 1. In addition, water having a hardness of 20 degrees or more is generally referred to as hard water, and water having a hardness of 10 degrees or less is referred to as soft water.

On the other hand, ships are provided with a desalination plant that produces fresh water from seawater to cover freshwater used for cooling, drinking water, and the like. At this time, the desalination plant generally produces fresh water in the form of distilled water by distilling the sea water, so that the fresh water produced by the desalination plant contains almost no minerals. Therefore, the fresh water produced by the desalination plant has a very low hardness. At this time, in case of fresh water having a low hardness, since the solubility to metal ions may increase and cause corrosion of the pipe, fresh water produced by the desalination plant is supplied to each part of the ship through the pipe after adjusting the hardness within a predetermined range. Will be.

1 is a schematic view showing a water hardening system for ships using a conventional retarding filter 40. Referring to Figure 1, the fresh water produced in the desalination plant (not shown) of the vessel is stored in the fresh water storage tank 20, it is supplied to each part of the ship through the fresh water supply line (10). At this time, the fresh water produced in the desalination plant is too low hardness may cause pipe corrosion, etc., the fresh water supply line 10 is provided with a retarding filter 40, fresh water flowing through the fresh water supply line 10 After the predetermined degree of hardness is adjusted via the retarding filter 40 is supplied to each part of the ship.

In general, the retarding filter 40 is filled with dolomite (CaMg (CO ₃ ) ₂ ) grains having a diameter of 2 to 7 mm, and the fresh water introduced into the retarding filter 40 forms pores of the dolomite. As it passes, calcium (Ca), magnesium (Mg), and the like of dolomite are melted to increase the hardness.

However, the conventional retarding filter 40 has a problem that the clogging phenomenon frequently occurs due to the dolomite grains, and maintenance was very inconvenient because replacement of the dolomite grains had to be made manually by hand. In addition, since hardness is controlled depending on the amount of dolomite filled, when the hardness of fresh water passing through the retarding filter 40 is lower than the appropriate hardness, the dolomite grains are manually filled while the hardness is higher than the appropriate hardness. When high, the hardness was adjusted by repeating the re-filling of the dolomite grains, which were filled in by hand. Therefore, the work was very inefficient, there was a problem that can not be precise hardness control. In addition, since the solubility of dolomite is low, a long residence time is required to increase the hardness of fresh water within a set range, and there is a problem that a pressure drop occurs on the fresh water supply line 10 due to the filter system. In addition, due to the bulky and heavy retarding filter 40, there has been a problem that it is difficult to reduce the size and weight of the equipment.

The present invention is to solve the above problems, it is to provide a hard water hardening system for ships easy to maintain hardness and easy maintenance.

According to an aspect of the invention, the first branch line branched from the fresh water supply line; By hardening the fresh water supplied from the first branch line, comprising a first reaction tank for dissolving carbon dioxide in the fresh water and a second reaction tank for dissolving the hardness agent in fresh water in which the carbon dioxide is dissolved. Hardness control unit; A hardness agent injecting unit for injecting the hardness agent into the hardness control unit; A second branching line for joining the hardened freshwater in the hardness control unit to the freshwater supply line; A sensor unit provided at a rear end of the second branch line and measuring at least one of hardness and acidity of fresh water flowing through the rear end of the second branch line; And a control unit for adjusting the dose of the hardness agent based on the measured value of the sensor unit.

In this case, the first branch line may include a flow control valve provided at a branch point branched from the fresh water supply line.

The hardness control unit may further include a partition wall partitioning the first reaction tank and the second reaction tank.

In this case, the partition wall, the first partition wall is formed so that the upper end is spaced apart from the ceiling surface of the hardness control portion, a predetermined interval spaced in the interior of the first partition wall, the lower end is predetermined with the bottom surface of the hardness control portion And a second partition wall formed to be spaced apart from each other, and a freshwater flow passage formed between the first partition wall and the second partition wall.

The hardness control unit may further include a stirring device unit mounted in the second reaction tank to promote dissolution of the hardness agent.

The hardness control unit may further include a flow rate control unit disposed at an inner upper portion of the second reaction tank and connected to the second branch line to discharge the hardened fresh water from the second reaction tank to the second branch line. It may include.

At this time, the flow rate control portion, the upper and lower surface is formed to be opened, the outer casing is connected to the second branch line on the outside; And an inner casing formed extending from the inner circumferential surface of the outer casing, and having a freshwater inlet through which fresh water flows into a central portion thereof, and a circumferential portion of the freshwater inlet extending upward to form a blocking plate.

A space portion communicating with the second branch line may be formed between the outer casing and the inner casing.

In addition, the upper end of the blocking plate, it may be formed lower than the upper end of the outer casing.

In addition, the upper end portion of the blocking plate, the inclined surface in the vertical direction is sequentially repeated along the edge, it may be formed in a zigzag form.

On the other hand, the hardness agent injection unit, the hardness agent storage line disposed on the upper side of the hardness control unit and the hardness agent storage tank, and the hardness agent injection line for guiding the hardness agent stored in the hardness agent storage tank to the second reaction tank. And, it may include a dose adjustment valve provided on the hardness injection line.

The controller may adjust a flow rate of fresh water flowing in the first branch line based on the measured value of the sensor unit.

On the other hand, the ship water hardening system, the carbon dioxide supply line for supplying carbon dioxide in the exhaust gas generated from the engine of the ship to the first reaction tank; may further include a.

In this case, the carbon dioxide supply line may be provided with an acid generator unit for generating carbon dioxide bubbles at one end.

In addition, the diffuser unit may include an annular first conduit connected to one end of the carbon dioxide supply line, and a plurality of second conduits disposed radially to the first conduit.

On the other hand, the marine water hardening system, it is provided at the rear end of the sensor unit, the filter unit for filtering the fresh water; may further include a.

Embodiments of the present invention is very easy to adjust the hardness using a method of directly dissolving the hardness agent in the hardness control, it is possible to miniaturization, light weight because it does not use a conventional retarding filter.

In addition, the embodiments of the present invention are very easy to maintain because it can be used semi-permanently just to fill the hardness agent injection portion.

1 is a schematic view showing a marine water hardening system using a conventional retarding filter.
2 is a block diagram of a water hardening system for ships according to an embodiment of the present invention.
Figure 3 is a side cross-sectional view showing an embodiment of the hardness control portion shown in FIG.
4 is a plan view of the hardness adjustment unit shown in FIG.
5 is a partial cross-sectional view showing an embodiment of the flow control unit shown in FIG.
Figure 6 is a side cross-sectional view showing the operation of the flow control unit shown in FIG.
7 is a plan view showing an embodiment of the diffuser unit shown in FIG.

Hereinafter, with reference to the drawings will be described the configuration of the marine water hardening system according to an embodiment of the present invention.

2 is a block diagram of a water hardening system for ships 100 according to an embodiment of the present invention.

Referring to Figure 2, the fresh water produced in the desalination plant (not shown) of the vessel is stored in the fresh water storage tank 20, each part of the ship through the fresh water supply line 10 connected to the fresh water storage tank (20). Supplied. At this time, the transfer pump 30 may be installed in the fresh water supply line 10 as necessary. Since freshwater produced in the desalination plant is distilled water, hardness of water is very low. Therefore, the hardness is adjusted within a predetermined range before being supplied to each part of the ship. Ship water hardening system 100 according to an embodiment of the present invention is provided on the fresh water supply line 10 to perform the hardness control as described above.

Specifically, the ship water hardening system 100 according to an embodiment of the present invention, the first branch line 110, the hardness control unit 120, the hardness injection unit 130, the second branch line 140, The sensor unit 150 and the controller 160 are included.

The first branch line 110 is branched from the fresh water supply line 10 to bypass a portion of the fresh water flowing through the fresh water supply line 10 to the hardness control unit 120. In this case, the flow rate control valve 111 may be provided at the branch point P1 where the first branch line 110 branches from the fresh water supply line 10. The flow control valve 111 adjusts the flow rate of fresh water flowing to the first branch line 110, and is controlled by the controller 160 to be described later.

The hardness control unit 120 is connected to the first branch line 110 and hardens the fresh water supplied from the first branch line 110. That is, the hardness control unit 120 may increase the hardness of the fresh water by dissolving carbon dioxide and the hardness agent sequentially in fresh water supplied from the first branch line 110. At this time, the hardness control unit 120 is divided into a first reaction tank (121, FIG. 3) for dissolving carbon dioxide in fresh water, and a second reaction tank (122, FIG. 3) for dissolving the hardness agent in fresh water. Can be. Detailed configuration of the hardness control unit 120 will be described later.

The hardness agent input unit 130 inputs the hardness agent into the hardness control unit 120. In this case, the hardness agent is a substance capable of increasing hardness by dissolving in fresh water, and may include calcium carbonate, sodium carbonate, sodium hydrogen carbonate, calcium hydroxide, sodium hydrogen phosphate, sodium phosphate, sodium hydroxide, and the like. In addition, the hardness agent may include both powder or liquid form.

On the other hand, the hardness input unit 130 may be formed of a hardness storage tank 131, the hardness input line 132 and the input amount control valve 133. Hardener storage tank 131 is disposed on the upper side of the hardness control unit 120, the hardness agent is stored. The hardness input line 132 is a pipe into which the hardness agent is injected from the hardness storage tank 131 to the hardness control unit 120, and may be provided at a lower side of the hardness storage tank 131. In addition, the dose adjustment valve 133 is provided on the hardness agent injection line 132, and adjusts the amount of the hardness agent is injected into the hardness control unit 120, it is controlled by the controller 160 to be described later.

The second branch line 140 is connected to the hardness control unit 120 and the fresh water supply line 10, and joins the hard water freshwater from the hardness control unit 120 to the fresh water supply line 10 again. That is, the fresh water that has been hardened by the hardness control unit 120 flows through the second branch line 140 and is discharged to the confluence point P2 where the fresh water supply line 10 and the second branch line 140 meet each other.

The sensor unit 150 is provided at the rear end of the confluence point P2 of the fresh water supply line 10 and measures the hardness and acidity of fresh water flowing through the rear end of the confluence point P2. Ship hardening system 100 according to an embodiment of the present invention is to control the hardness of fresh water, the sensor unit 150 directly measures the hardness, and based on this, the controller 160 controls the amount of the hardness agent, etc. Although it is preferable to control, in general, the sensor for measuring hardness is an expensive device, and may be configured to indirectly measure the acidity of the sensor unit 150 using a pH meter or the like. That is, in general, when the hardness is increased, the solubility of the metal ions becomes high, and the acidity is increased. When the hardness is low, the solubility of the metal ions is decreased and the alkalinity becomes low, and thus the sensor unit 150 indirectly measures the acidity as described above. It may be configured to measure the hardness of fresh water. However, hereinafter, the description will be given based on the case where the hardness is directly measured by the sensor unit 150 for convenience of description.

The controller 160 adjusts the dose of the hardener based on the measured value of the sensor unit 150. That is, the controller 160 may adjust the opening / closing amount of the input amount control valve 133 provided in the hardness agent input unit 130 according to the hardness (or acidity) measured by the sensor unit 150. For example, when the hardness measured by the sensor unit 150 is greater than or equal to a predetermined maximum hardness value, the controller 160 may adjust the amount of the hardness agent to be reduced by reducing the opening / closing amount of the dose control valve 133. On the contrary, when the hardness measured by the sensor unit 150 is equal to or less than the preset minimum hardness value, the controller 160 may increase the opening and closing amount of the dose control valve 133 to adjust the dose of the hardness agent to increase.

In addition, the controller 160 may adjust the flow rate of fresh water flowing to the first branch line 110 based on the measured value of the sensor unit 150. That is, the controller 160 may control the flow control valve 111 provided at the branch point P1 of the first branch line 110 according to the hardness (or acidity) measured by the sensor unit 150. For example, when the hardness measured by the sensor unit 150 is greater than or equal to a preset maximum hardness value, the controller 160 controls the flow control valve 111 to reduce the flow rate of fresh water flowing to the first branch line 110. Can be controlled. On the contrary, when the hardness measured by the sensor unit 150 is equal to or less than a predetermined minimum hardness value, the controller 160 may control the flow control valve 111 to increase the flow rate of fresh water flowing to the first branch line 110. Can be.

On the other hand, if necessary, the controller 160 may control both the dose of the hardness agent and the flow rate of the first branch line 110. In this case, the flow rate of the first branch line 110 is first adjusted according to the measured value of the sensor unit 150, and the input amount of the hardener is secondarily adjusted to allow more precise control. In addition, due to the multi-stage control method, operation can be guaranteed with certainty, and rapid control response can be expected.

On the other hand, the ship water hardening system 100 according to an embodiment of the present invention may further include a carbon dioxide supply line 170.

The carbon dioxide supply line 170 supplies carbon dioxide to the first reaction tank 121. In this case, the carbon dioxide supply line 170 may supply carbon dioxide in the exhaust gas generated from an engine (not shown) of the vessel to the first reaction tank 121. Therefore, the ship hardening system 100 does not require a separate carbon dioxide source for use in the first reaction tank 121, it is possible to improve the efficiency of the installation. In addition, the ship water hardening system 100 can reduce the emission of carbon dioxide that is a cause of the greenhouse effect by reusing the carbon dioxide discharged from the engine of the ship in the ship.

Meanwhile, as necessary, a carbon dioxide supply line 170 may be provided with a filtration device (not shown) for removing contaminants (SOx, NOx, impurity particles, etc.) in the exhaust gas.

In addition, the carbon dioxide supply line 170 may be provided with an diffuser unit 171 (see FIG. 3) at one end. The diffuser unit 171 generates carbon dioxide bubbles in the first reaction tank 121 to promote dissolution of carbon dioxide. The detailed configuration of the diffuser equipment 171 will be described later.

On the other hand, the ship water hardening system 100 according to an embodiment of the present invention may further include a filter unit 180.

The filter unit 180 is disposed on the fresh water supply line 10, and is specifically provided at the rear end of the sensor unit 150. The filter unit 180 finally filters fresh water whose hardness is adjusted, and filters out particulate impurities and the like contained in the fresh water. Therefore, in the process of supplying fresh water to each part of the vessel, problems such as clogging due to impurities contained in fresh water can be prevented in advance.

Hereinafter, with reference to the drawings, the configuration of the hardness control unit 120 will be described in detail.

3 is a side cross-sectional view showing an embodiment of the hardness control unit 120 shown in FIG. 4 is a plan view of the hardness control unit 120 shown in FIG.

3 and 4, the hardness control unit 120 may include a first reaction tank 121, a second reaction tank 122, and a partition wall part 123.

The first reaction tank 121 is for dissolving carbon dioxide primarily in fresh water supplied from the first branch line 110, and the second reaction tank 122 is fresh water in which carbon dioxide is dissolved in the first reaction tank 121. It is for dissolving the hardness agent. In this case, the first reaction tank 121 and the second reaction tank 122 may be partitioned by the partition 123.

In the present embodiment, the hardness control unit 120 is formed in a circular shape in the plane, the partition 123 is formed in an annular shape inside the hardness control unit 120, the first reaction tank 121 on the outer side And the second reaction tank 122 at the center side are illustrated. (See FIG. 4) However, the shape of the hardness control unit 120 or the partition wall part 123 may be variously modified as necessary. The present invention is not limited to the above example.

The partition 123 may include a first partition 123a, a second partition 123b, and a fresh water flow passage 123c. The first partition wall 123a is formed to extend upward from the bottom surface 127 of the hardness control unit 120, and the top partition wall 123a is spaced apart from the ceiling surface 126 by a predetermined distance. The second partition wall 123b is disposed to be spaced apart by a predetermined interval into the first partition wall 123a and extends downward from the ceiling surface 126 of the hardness control unit 120. In addition, the lower end of the second partition 123b is formed to be spaced apart from the bottom surface 127 by a predetermined interval.

The freshwater flow passage 123c is formed between the first partition 123a and the second partition 123b, and the fresh water in which carbon dioxide is dissolved in the first reaction tank 121 moves to the second reaction tank 122. It functions as a passage. At this time, since the upper end of the first partition wall 123a is formed to be spaced apart from the ceiling surface 126 by a predetermined interval, the upper end of the freshwater flow passage 123c communicates with the first reaction tank 121. In addition, since the lower end of the second partition wall 123b is formed to be spaced apart from the bottom surface 127 by a predetermined interval, the lower end of the freshwater flow passage 123c communicates with the second reaction tank 122. That is, the fresh water flow passage 123c has an upper end communicating with the first reaction tank 121 and a lower end communicating with the second reaction tank 122.

On the other hand, the hardness control unit 120 may further include a stirring device unit 124 mounted to the second reaction tank 122. The stirring device 124 is for promoting dissolution of the hardness agent in the second reaction tank 122, and a propeller type stirrer, a OR type stirrer, a turbine type stirrer, a spiral type stirrer, and the like may be used. In the present embodiment, for convenience of description, a case where a propeller type stirrer is installed at the center side of the bottom surface 127 of the second reaction tank 122 as the stirring device 124 is illustrated. However, if necessary, the stirring device unit 124 may be formed in various forms, such as an ore type stirrer, a turbine type stirrer, a spiral shaft type stirrer, etc., or may be installed on the side portion of the second reaction tank 122, It may be.

Meanwhile, the hardness control unit 120 may further include a flow rate control unit 125 disposed in the second reaction tank 122.

Flow control unit 125 is disposed in the second reaction tank 122, is connected to the second branch line 140, the fresh water from the second reaction tank 122 through the second branch line 140 Drain it. At this time, the flow rate control unit 125 is to be disposed on the upper side of the second reaction tank 122 in order to discharge only fresh water in which the hardener is sufficiently dissolved in the second reaction tank 122 to the second branch line 140. Can be. In addition, in the above case, the second reaction tank 122 may be provided with a support bracket (not shown) for fixing the flow rate control unit 125 to the upper side of the tank.

5 is a partial cross-sectional view showing an embodiment of the flow control unit 125 shown in FIG. 6 is a side cross-sectional view showing the operation of the flow control unit 125 shown in FIG.

5 and 6, the flow control unit 125 includes an outer casing 125a and an inner casing 125d, and communicates with the second branch line between the outer casing 125a and the inner casing 125d. The space portion to be formed can be formed.

The outer casing 125a is formed so that the upper and lower surfaces thereof are opened, and the second branch line 140 is connected to the outside. In the case of the present embodiment, the outer casing 125a has a case where the upper and lower surfaces are formed in an open cylindrical shape. However, the shape of the outer casing 125a is not limited to the cylindrical shape, and the outer casing 125a may be formed in various shapes such as a rectangular shape and a polygonal shape as long as its upper and lower surfaces are opened to allow fresh water to flow inward. Can be.

The inner casing 125d extends from the inner circumferential surface of the outer casing 125a and has a fresh water inlet 125b through which fresh water flows into the central portion. That is, the inner casing 125d is formed along the inner circumferential surface of the outer casing 125a, partially closing the lower opening of the outer casing 125a, and forming a fresh water inlet 125b at the center thereof. In addition, the circumferential portion of the fresh water inlet 125b extends upward to form the blocking plate 125c. The blocking plate 125c is for controlling the flow rate of freshwater flowing into the second branch line 140 by restricting the flow of freshwater flowing into the freshwater inlet 125b, and the upper end of which is disposed at the upper end of the outer casing 125a. It may be formed to a predetermined degree lower than. In addition, the upper end of the blocking plate 125c may be formed in a zigzag shape. That is, the upper end of the blocking plate 125c may be formed so that the inclined surface of the vertical direction is sequentially repeated along the edge, and may be formed in a sawtooth shape or a zigzag shape as a whole.

On the other hand, a space 125e is formed between the outer casing 125a and the inner casing 125d. That is, the upper side is opened between the outer casing 125a and the inner casing 125d by the inner surface of the outer casing 125a, the lower side of the inner casing 125d, and the blocking plate 125c of the inner casing 125d. The space portion 125e may be formed. The space part 125e is for temporarily accommodating fresh water that overflows the blocking plate 125c and communicates with the second branch line 140 connected to the outer casing 125a.

6 shows the flow path of fresh water discharged to the second branch line 140 through the flow control unit 125. Referring to FIG. 6, the fresh water in the second reaction tank 122 flows in through the fresh water inlet 125b formed at the lower side of the flow control unit 125, and the introduced fresh water flows over the blocking plate 125c to fill the space. It will flow down to 125e. At this time, the blocking plate 125c is formed so that the upper end is lower than the upper end of the outer casing 125a. When the water level of the second reaction tank 122 is higher than the upper end of the blocking plate 124c, the overflow phenomenon naturally occurs. Can happen. In addition, due to the upper end of the blocking plate 125c formed in a zigzag shape, the overflow phenomenon as described above may be more smoothly performed. On the other hand, fresh water flowing down into the space 125e is discharged out of the second reaction tank 122 through the second branch line 140.

As described above, the flow controller 125 discharges the fresh water in the second reaction tank 122 to the second branch line 140 by overflowing the blocking plate 125c to the second branch line 140. It is possible to keep the flow rate of fresh water to be constant to a predetermined degree. That is, when the second branch line 140 is directly connected to the second reaction tank 122, the flow rate of fresh water discharged to the second branch line 140 by the water pressure or the water level in the second reaction tank 122 While the abrupt increase and decrease may be performed, the flow rate control unit 125 may flow over the blocking wall 125c so that only fresh water flowing into the space portion 125e is discharged through the second branch line 140. The flow rate can be adjusted constantly.

Meanwhile, referring again to FIG. 3, the first branch line 110 may be arranged to supply fresh water from the lower side of the first reaction tank 121. That is, the fresh water supplied from the first branch line 110 may be formed to flow into the lower side of the first reaction tank 121. In this case, the fresh water introduced into the first reaction tank 121 flows from the lower portion of the first reaction tank 121 to the upper side to be introduced into the freshwater flow passage 123c, thereby forming a long flow path of fresh water. can do. Therefore, the first reaction tank 121 has a time allowance for sufficiently dissolving carbon dioxide in fresh water.

In addition, the carbon dioxide supply line 170 may also be arranged to supply carbon dioxide from the lower side of the first reaction tank 121. In such a case, the carbon dioxide supplied from the carbon dioxide supply line 170 flows from the lower side to the upper side of the first reaction tank 121 and has sufficient time allowance to be dissolved in fresh water.

In addition, the carbon dioxide supply line 170 may be provided with an air diffuser 171 at one end. The diffuser unit 171 is provided at one end of the carbon dioxide supply line 170 and disposed in the first reaction tank 122 to generate carbon dioxide bubbles to promote dissolution of carbon dioxide in the first reaction tank 122. have.

FIG. 7 is a plan view of the diffuser 171 shown in FIG. 3.

Referring to FIG. 7, the diffuser unit 170 may be formed of a first conduit 171a and a plurality of second conduits 171b. The first conduit 171a is connected to the carbon dioxide supply line 170 and may be formed in an annular shape. In addition, a plurality of second conduits 171b may be disposed radially along the circumference of the first conduit 171a and discharge carbon dioxide introduced from the first conduits 171a in the form of a plurality of bubbles. In this case, the second conduit 171b may be formed of a thin tube such as a capillary tube in order to generate finer carbon dioxide bubbles.

Arrows shown in FIG. 7 indicate a flow path of carbon dioxide introduced into the diffuser 171. Referring to the arrow shown in FIG. 7, the carbon dioxide supplied from the carbon dioxide supply line 170 flows along the first conduit 171a, so that the second conduit 171b radially disposed in the first conduit 171a. Through the first reaction tank 121 is discharged. At this time, since the second conduit 171b is formed in plural, carbon dioxide is discharged in the form of a plurality of small bubbles. Therefore, the contact area of carbon dioxide and fresh water can be increased, thereby promoting the dissolution of carbon dioxide.

However, the shape of the diffuser unit 171 is not limited to this, and other forms in which carbon dioxide may be discharged are possible.

Meanwhile, referring again to FIG. 3, the flow rate controller 125 and the second branch line 140 may be disposed on the upper side of the second reaction tank 122. In this case, the fresh water flowing into the lower side of the second reaction tank 122 through the fresh water flow passage 123c flows to the upper side of the second reaction tank 122, thereby controlling the flow rate control unit 125 and the second branch. It is discharged to the fresh water supply line 10 through the line 140. Therefore, it may have a sufficient time to dissolve the hardener in the fresh water introduced into the second reaction tank 122.

In addition, in the present exemplary embodiment, the fresh water in the second reaction tank 122 is naturally formed to flow along the second branch line 140 due to a drop, but the second branch line 140 is provided as necessary. A suction pump (not shown) or the like may be installed to suck fresh water from the second storage tank 122.

Hereinafter, with reference to the drawings will be described the operation of the marine hardening system 100 according to an embodiment of the present invention.

Arrows shown in Figures 2 and 3 represent the flow path of fresh water. Hereinafter, for convenience of description, an operation process of the water hardening system 100 for ships along the flow path of fresh water shown in FIGS. 2 and 3 will be described.

First, referring to FIG. 2, fresh water produced in a desalination facility (not shown) of a ship is stored in a freshwater storage tank 20. At this time, the freshwater stored in the freshwater storage tank 20 is a kind of distilled water, which has a very low hardness.

The fresh water stored in the fresh water storage tank 20 flows through the fresh water supply line 10 through the transfer pump 30. When the fresh water flowing in the fresh water supply line 10 reaches the branch point P1 where the first branch line 110 branches, part of the fresh water flows to the first branch line 110 by the flow control valve P1. The remainder will continue to flow along the fresh water supply line 10.

On the other hand, fresh water flowing into the first branch line 110 is introduced into the hardness control unit 120.

Referring to FIG. 3, fresh water flowing along the first branch line 110 flows into the lower side of the first reaction tank 121. At this time, carbon dioxide is supplied to the first reaction tank 121 by the carbon dioxide supply line 170. Therefore, while the fresh water flowing into the lower side of the first reaction tank 121 flows to the upper side of the first reaction tank 121, carbon dioxide is dissolved. At this time, the carbon dioxide supply line 170 may be equipped with an acid generator unit 171 to promote the dissolution of carbon dioxide. Since the diffuser unit 171 has been described above, a detailed description thereof will be omitted.

On the other hand, when carbon dioxide is dissolved in fresh water as described above, solubility in a hardness agent such as calcium carbonate increases. That is, the fresh water introduced into the first reaction tank 121 undergoes a carbon dioxide dissolution process as a pretreatment process, thereby dissolving the hardener in the second reaction tank 122.

On the other hand, the fresh water flowing to the upper side of the first reaction tank 121 flows through the first partition wall (123a) flows into the fresh water flow passage (123c). In addition, the freshwater flowing into the freshwater flow passage 123c flows downward along the first and second partitions 123a and 123b and flows into the lower side of the second reaction tank 122.

At this time, a hardness agent such as calcium carbonate is introduced into the second reaction tank 122 by the hardness agent injecting unit 130, and the fresh water introduced into the second reaction tank 122 dissolves the hardness agent as described above to increase hardness. Done. That is, the fresh water flowing into the lower side of the second reaction tank 122 is dissolved in the hardness agent while flowing to the upper side of the second reaction tank 122, thereby increasing the hardness of the fresh water. At this time, the stirring device unit 124 attached to the second reaction tank 122 forms a vortex or the like in the second reaction tank 122 to promote dissolution of the hardness agent as described above.

The fresh water in which the hardener is dissolved and hardened in the second reaction tank 122 flows to the second branch line 140 through the flow control unit 125 provided on the upper side of the second reaction tank 122. Since the fresh water flows to the second branch line 140 through the flow control unit 125 as described above, a detailed description thereof will be omitted (see FIG. 6).

On the other hand, referring again to Figure 2, the fresh water flowing to the second branch line 140 is joined again with fresh water flowing in the fresh water supply line 10 at the confluence point (P2). At this time, the sensor unit 150 measures the hardness (or acidity) of fresh water flowing through the confluence point P2, and the controller 160 controls the flow control valve 111 based on the measured value of the sensor unit 150. And the dose control valve 133. Since the control mechanism of the controller 160 has been described above, a detailed description thereof will be omitted.

Finally, the fresh water passing through the sensor unit 150 is filtered through the filter unit 180 and finally particulate impurities, and is supplied to each part of the ship along the fresh water supply line (10).

As described above, the ship water hardening system 100 according to an embodiment of the present invention, because it directly dissolves the hardness agent in the hardness control unit 120, it is very easy to control the hardness. Therefore, the hardness of the fresh water is too high to cause pipe corrosion or the like, on the contrary, the hardness is too low to prevent the metal precipitation. In addition, maintenance can be very easy because it can be used semi-permanently just by filling the hardness agent injection unit 130. In addition, there is no fear that a pressure drop by a filtering system, such as a conventional retarding filter 40 (see FIG. 1), may be generated by directly dissolving the hardness agent, and the retarding filter 40 may be bulky and heavy. It is possible to reduce the size and weight of equipment by not using).

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit of the invention as set forth in the appended claims. The present invention can be variously modified and changed by those skilled in the art, and it is also within the scope of the present invention.

100: marine water hardening system
110: first branch line 130: hardness agent injection portion
111: flow control valve 131: hardness agent storage tank
120: hardness control unit 132: hardness agent injection line
121: first reaction tank 133: input amount control valve
122: second reaction tank 140: second branch line
123: partition wall 150: sensor
124: stirring device 160: control unit
125: flow rate control unit 170: carbon dioxide supply line
126: ceiling surface 171: diffuser unit
127: bottom

Claims (15)

A first branch line 110 branched from the fresh water supply line 10;
By hardening the fresh water supplied from the first branch line 110, the first reaction tank 121 for dissolving carbon dioxide in the fresh water and the agent for dissolving the hardness agent in fresh water in which carbon dioxide is dissolved. Hardness control unit 120 including a reaction tank 122;
A hardness agent input unit 130 for injecting the hardness agent into the hardness control unit 120;
A second branch line 140 for joining the fresh water that has been hardened by the hardness control unit 120 to the fresh water supply line 10;
A sensor unit 150 provided at a rear end of the confluence point P2 of the second branch line 140 and measuring at least one of hardness and acidity of the fresh water flowing through the rear end of the confluence point P2; And
And a control unit (160) for adjusting the input amount of the hardness agent based on the measured value of the sensor unit (150).
The method according to claim 1,
The first branch line 110,
Water hardening system for a ship comprising a flow control valve 111 is provided at the branch point (P1) branched from the fresh water supply line (10).
The method according to claim 1,
The hardness control unit 120,
Water hardening system for a ship further comprises a partition wall portion (123) for partitioning the first reaction tank (121) and the second reaction tank (122).
The method according to claim 3,
The partition 123 is,
A first partition 123a having an upper end spaced apart from the ceiling surface 126 by a predetermined distance;
A second partition wall 123b disposed to be spaced apart from the first partition wall 123a by a predetermined distance, and having a lower end spaced apart from the bottom surface 127 by a predetermined distance; And
And a freshwater flow passage (123c) formed between the first partition wall (123a) and the second partition wall (123b).
The method according to claim 1,
The hardness control unit 120,
And a stirring device unit (124) mounted in the second reaction tank (122) to promote dissolution of the hardener.
The method according to claim 1,
The hardness control unit 120,
It is disposed on the inner upper portion of the second reaction tank 122, is connected to the second branch line 140 to discharge the hard water fresh water from the second reaction tank 122 to the second branch line 140. Ship water hardening system further comprises a flow control unit 125 to.
The method of claim 6,
The flow control unit 125,
An outer casing (125a) having an upper and lower surfaces formed therein and having an outer side connected to the second branch line (140); And
It is formed extending from the inner circumferential surface of the outer casing (125a), the fresh water inlet (125b) is formed in the fresh water inlet in the center, the circumferential portion of the fresh water inlet (125b) is extended to the blocking plate (125c) It includes the formed inner casing 125d,
A water hardening system for ships having a space portion 125e communicating with the second branch line 140 between the outer casing 125a and the inner casing 125d.
The method of claim 7,
The upper end of the blocking plate 125c,
Water hardening system for ships formed lower than the upper end of the outer casing (125a).
The method of claim 7,
The upper end of the blocking plate 125c,
The inclined surface of the vertical direction along the rim is sequentially repeated, the water hardening system for ships formed in a zigzag form.
The method according to claim 1,
The hardness agent injection unit 130,
A hardness agent storage tank 131 disposed above the hardness control unit 120 and storing the hardness agent;
A hardener injection line 132 for guiding the hardener stored in the hardener storage tank 131 to the second reaction tank 122;
Water hardening system for a ship comprising an input amount control valve (133) provided on the hardness input line (132).
The method according to claim 1,
The control unit 160,
Based on the measured value of the sensor unit 150, hardening system for ships to adjust the flow rate of fresh water flowing to the first branch line (110).
The method according to claim 1,
And a carbon dioxide supply line (170) for supplying carbon dioxide in exhaust gas generated from an engine of the vessel to the first reaction tank (121).
The method of claim 12,
The carbon dioxide supply line 170,
Ship water hardening system is provided with an air diffuser unit 171 for generating carbon dioxide bubbles at one end.
The method according to claim 13,
The diffuser unit 171,
An annular first conduit 171a connected to one end of the carbon dioxide supply line 170;
Hardening system for ships comprising a plurality of second conduits (171b) radially disposed in the first conduit (171a).
The method according to claim 1,
It is provided at the rear end of the sensor unit 150, the filter unit 180 for filtering the fresh water; Hardening system for ships further comprising.

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