JP2018140727A - Desulfurization device for vessel and vessel loaded with desulfurization device for vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a desulfurization device for vessel and a vessel loaded with the desulfurization device for vessel obtaining reduction in power consumption and processing space by obtaining great reduction in pumped-up quantity of sea water.SOLUTION: A desulfurization device for vessel includes: a desulfurization absorption tower 13 for carrying out desulfurization of exhaust gas 11 by bring the exhaust gas 11 containing sulfur oxide into contact with sea water 12; a sea water introduction line Lfor introducing the sea water 12 to the desulfurization absorption tower 13; a desulfurization discharge water draining line Lfor draining desulfurization discharge water 14 with absorbed sulfur oxide; and a fluid dispersion device 15 provided at a draining port or in the middle of drainage of the desulfurization discharge water draining line Lfor dispersing the desulfurization discharge water 14 outboard.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a ship desulfurization apparatus and a ship equipped with the ship desulfurization apparatus.

  With the recent tightening of exhaust gas regulations for ships, the use of fuel oil with a sulfur content of 0.1% or less or alternative measures that have the same effect is required in the emission control sea area (ECA sea area). Furthermore, in 2020, the use of fuel oil with a sulfur content of 0.5% or less or alternative measures that have the same effect will be required even in general sea areas. Conventionally, for example, ultra large vessels such as ULCS (Ultra Large Container Ship) have responded by using low sulfur fuel oil with low sulfur content. Expected to increase.

  The amount of exhaust gas discharged from the main engine of a very large ship (the amount of exhaust gas at 100% load) reaches, for example, 200,000 Nm3 / h or more. Moreover, in order to respond to various electric power demands etc. in a very large ship, a plurality of power generation engines and boilers are installed. For this reason, a desulfurization apparatus mounted on a super-large ship needs an absorption tower having a large passage area in order to desulfurize a large amount of exhaust gas discharged from these main engines and a plurality of power generation engines / boilers. When trying to cope with this with a conventional desulfurization device for a main engine mounted on a relatively small ship such as a bulk carrier, it becomes necessary to arrange a plurality of absorption towers, and the load is reduced when placing in the ship, or Design restrictions and changes such as expansion of hull dimensions will occur.

  Further, a conventional desulfurization apparatus for a relatively small main engine uses a round (circular) absorption tower, and it is conceivable to enlarge the round absorption tower for a very large ship. However, since a round absorption tower tends to generate a dead space when arranged in a ship as compared with a square absorption tower or the like, there arises a problem that the arrangement efficiency deteriorates when arranged in the ship.

  Therefore, in order to solve the above problem, it is conceivable to adopt a square absorption tower that has a proven track record in a desulfurization apparatus for terrestrial use such as plant facilities and factories as an absorption tower of a desulfurization apparatus for very large ships. However, when a marine diesel engine uses a fuel having a high sulfur content such as C heavy oil, the exhaust gas contains a large amount of sulfur oxide. As a desulfurization method for removing this sulfur oxide, for example, a desulfurization method using seawater as an absorbent has been proposed (Patent Document 1).

JP 2014-233702 A

  However, when the desulfurization treatment method using seawater of Patent Document 1 is applied to ship desulfurization treatment, seawater for diluting desulfurization wastewater is pumped from the outside and used in large quantities as diluted seawater by a pump. It is necessary to pump up, and the energy consumption rate becomes enormous. Moreover, the dilution tank which reacts a desulfurization waste water and diluted seawater is also required, and there exists a problem that the installation space of the dilution tank in a ship has restrictions.

  In addition, when applied to a large vessel, the amount of desulfurization wastewater also increases, but when desulfurization wastewater is discharged out of the ship using a discharge pipe, a potential core exists at the center of the discharge jet from the discharge pipe. This potential core has a longer remaining length as the diameter of the discharge pipe becomes larger, and the same pH value as the outlet part of the discharge pipe remains in the seawater for a predetermined distance. There is a strong desire to eliminate the potential core.

  In addition, the expansion of the regulation area will be formulated in accordance with the strengthening of ship exhaust gas regulations by the International Maritime Organization (IMO), so the amount of pumped seawater will be drastically reduced, power consumption will be reduced, and processing space will be reduced. The advent of marine desulfurization equipment is eagerly desired.

  The present invention has been invented under the background art as described above, and the object of the present invention is to greatly reduce the amount of pumped seawater, thereby reducing power consumption and processing space. The object is to provide a marine vessel desulfurization apparatus and a marine vessel equipped with the marine vessel desulfurization apparatus.

  The ship desulfurization device concerning one embodiment of the present invention for solving the subject mentioned above makes exhaust gas containing sulfur oxide contact seawater, and makes the seawater contain sulfur oxide contained in the exhaust gas. A desulfurization absorption tower for desulfurization of the exhaust gas as desulfurization waste water, a seawater introduction line for introducing the seawater into the desulfurization absorption tower, and a desulfurization that is connected to the desulfurization absorption tower and has absorbed sulfur oxides from the desulfurization absorption tower A desulfurization drainage discharge line for discharging wastewater; and a fluid diffusion device provided in the desulfurization drainage discharge line for diffusing the desulfurization drainage to the outside of the ship.

  According to the above invention, when the desulfurization drainage is jetted out of the ship by installing the fluid diffusion device, the potential core can be extinguished at a short distance, and a predetermined distance from the discharge port of the desulfurization drainage discharge line to the pH regulation point is set. The pH value at a distance can be satisfied.

  In some embodiments, the marine vessel desulfurization apparatus includes a diluted seawater line that introduces diluted seawater, and a dilution unit that mixes the desulfurized wastewater of the desulfurized drainage discharge line and the diluted seawater of the diluted seawater line, Dilute and mixed desulfurization wastewater is discharged out of the ship.

  According to said invention, since it has the dilution part which mixes the dilution seawater which introduce | transduces dilution seawater, the desulfurization drainage of the said desulfurization drainage discharge line, and the dilution seawater of a dilution seawater line, it is diluted from a dilution seawater line. Seawater can be used to diffuse the desulfurization effluent out of the ship while partially diluting it.

  In some embodiments, in the above-described marine vessel desulfurization apparatus, the fluid diffusion device is a swirl nozzle that is provided at a discharge port of the desulfurization drainage discharge line and discharges the desulfurization drainage discharged as a swirling flow.

  According to the above invention, by installing the swirl nozzle, the desulfurization effluent flow out of the ship is discharged as a swirl flow. This discharged swirling flow facilitates mixing of the seawater and desulfurization drainage out of the ship, and the potential core can be extinguished at a short distance.

  In some embodiments, in the ship desulfurization apparatus, the fluid diffusion device is an inward annular nozzle that is provided at a discharge port of the desulfurization drainage discharge line and discharges the desulfurization drainage to be discharged inward. Features.

  According to the above invention, by installing the inward annular nozzle, the desulfurization drainage flow to the outside of the ship is discharged as an inward swirl flow. The collision of the discharged inward swirl flow promotes mixing of the seawater and the desulfurization drainage out of the ship, and the potential core can be extinguished at a short distance.

  In some embodiments, in the marine vessel desulfurization apparatus, the fluid diffusion device includes a plurality of small-diameter discharge pipes that are provided at the discharge port of the desulfurization drainage discharge line and discharge the desulfurization drainage as a small capacity. It is characterized by being.

  According to the above invention, small-capacity desulfurization waste water is ejected from the small-diameter discharge pipe. Since a plurality of jets of this small volume are ejected, the mixing of the seawater and desulfurization effluent outside the ship can be promoted, and the potential core can be extinguished at a short distance.

  In some embodiments, in the ship desulfurization device, the fluid diffusion device is a slit nozzle provided at a discharge port of the desulfurization drainage discharge line and having a flat discharge port.

  According to said invention, by installing the slit nozzle which has a flat discharge port, a jet flow is concentrated flatly in a flat discharge port, and the desulfurization waste water outside a ship is discharged in flat shape. This flat jet flow promotes mixing of seawater and desulfurization effluent out of the ship, and can eliminate the potential core at a short distance.

  In some embodiments, in the ship desulfurization apparatus, the fluid diffusion device is provided at a discharge port of the desulfurization drainage discharge line, and a nozzle cylinder main body from which the desulfurization drainage is ejected, and a central portion of the nozzle cylinder main body. It is an annular nozzle having a solid cylindrical portion arranged in the axial direction.

  According to the above invention, the desulfurization drainage to the outside of the ship is provided by installing the nozzle cylinder body from which the desulfurization drainage is ejected and the annular nozzle in which the solid cylindrical part is arranged in the axial direction at the center of the nozzle cylinder body. Is discharged in an annular shape. Since this discharged annular flow promotes diffusion into seawater, mixing of seawater and desulfurization effluent outside the ship is promoted, and the potential core can be extinguished at a short distance.

  In some embodiments, in the marine vessel desulfurization apparatus, the fluid diffusion device has a collision portion that collides with desulfurization drainage to be discharged in the vicinity of an outlet of the discharge port of the desulfurization drainage line. To do.

  According to the above invention, by having the collision part colliding with the desulfurization drainage discharged near the outlet of the discharge port of the desulfurization drainage line, the thickness of the flow of the desulfurization drainage is reduced, and at the time of collision with the collision part A vortex is generated. The potential vortex can be extinguished at a short distance by promoting the stirring of the seawater outside the ship and the desulfurization drainage by the generated vortex.

  In some embodiments, in the above-described marine vessel desulfurization apparatus, the fluid diffusion device is a discharge pipe having one or both of a concave portion and a convex portion inside an outlet of a discharge port of the desulfurization drainage discharge line. Features.

  According to the above invention, by installing the concave or convex dimple surface inside the outlet of the desulfurization drainage discharge line, a resistance flow is generated and the flow of the desulfurization drainage fluid is promoted. Stirring is promoted by the generation of this resistance flow, mixing of seawater and desulfurization drainage outboard can be promoted, and the potential core can be extinguished at a short distance.

  In some embodiments, in the marine vessel desulfurization apparatus, the fluid diffusion device is a collision plate provided at a discharge port of the desulfurization drainage discharge line and having circular or slit-shaped pores. .

  According to the above invention, by installing a collision plate having circular or slit-shaped pores at the discharge port of the desulfurization drainage discharge line, the flow of fluid of the desulfurization drainage is promoted when passing through the pores. The Agitation is promoted by the resistance flow when passing through the pores, so that mixing of seawater and desulfurization drainage out of the ship can be promoted, and the potential core can be extinguished at a short distance.

  In some embodiments, the above-described marine vessel desulfurization apparatus is characterized in that the fluid diffusion device is an orifice nozzle provided at an outlet of the desulfurization drainage discharge line and having an orifice therein.

  According to said invention, an orifice is provided in the discharge port of a desulfurization waste_water | drain discharge line, and the disturbance of the flow of an ejection flow is accelerated | stimulated. Agitation is promoted by turbulence when passing through the orifice, so that mixing of seawater and desulfurization effluent outside the ship can be promoted, and the potential core can be extinguished at a short distance.

  In some embodiments, in the above-described marine vessel desulfurization apparatus, the fluid diffusion device is an ejector having an orifice in the discharge port of the desulfurization drainage discharge line or in the middle of discharge of the desulfurization drainage discharge line. .

  According to the above invention, by supplying the desulfurization wastewater to the orifice of the ejector, the diluted seawater is supplied from the outside by the discharge power of the desulfurization wastewater, and the jet jet is discharged while mixing the desulfurization wastewater and the diluted seawater. . The self-supplied seawater for dilution is mixed with desulfurized effluent and discharged as a jet jet, thereby facilitating the mixing of the seawater and jet jet out of the ship and extinguishing the potential core at a short distance.

  In some embodiments, in the marine vessel desulfurization apparatus, the fluid diffusion device includes a venturi mechanism in the middle of the discharge of the desulfurization drainage discharge line or the discharge port of the desulfurization drainage discharge line. .

According to said invention, by supplying desulfurization waste_water | drain to a venturi mechanism, the jet seawater is discharged, mixing dilute seawater and diluted seawater by self-suppliing diluted seawater from the outside by the contraction effect of a venturi. The self-supplied seawater for dilution is mixed with desulfurized effluent and discharged as a jet jet, thereby facilitating the mixing of the seawater and jet jet out of the ship and extinguishing the potential core at a short distance.

  In some embodiments, in the marine vessel desulfurization apparatus, the fluid diffusion apparatus includes a jet pump in the middle of the discharge port of the desulfurization drainage discharge line or the desulfurization drainage discharge line. .

  According to said invention, diluting seawater is self-supplied from the outside by restrict | squeezing the flow of desulfurization drainage in the negative pressure area | region of a jet pump, is mixed with desulfurization drainage, and is discharged. This self-supplied seawater for dilution is mixed with desulfurization effluent and discharged to promote mixing of both, promote mixing of seawater and jet jets outside the ship, and eliminate the potential core over a short distance be able to.

  In some embodiments, the marine vessel desulfurization apparatus is mounted on a marine vessel.

  According to the above invention, by mounting the ship desulfurization device on the ship, the potential core can be extinguished at a short distance when the desulfurization drainage is discharged. Thus, the regulated pH value can be satisfied within a predetermined distance from the desulfurization drain discharge port to the pH regulation point.

  In some embodiments, in the ship desulfurization apparatus, a first fluid diffusion device provided at an outlet of the desulfurization drainage discharge line and a second fluid diffusion device provided in the middle of discharge of the desulfurization drainage discharge line It is characterized by comprising.

  According to the above invention, by installing each of the two types of fluid diffusion devices, the stirring of the fluid of the desulfurization drainage is further promoted by a synergistic effect, and the mixing of the seawater and the desulfurization drainage outboard is promoted. Can be extinguished at a short distance.

  According to at least one embodiment of the present invention, when the desulfurization drainage is jetted out of the ship, the potential core can be extinguished at a short distance by the installation of the diffusion device, and the pH regulation point from the desulfurization drainage outlet. It is possible to provide a marine vessel desulfurization apparatus that can satisfy a pH value at a predetermined distance up to.

FIG. 1 is a schematic view showing a ship according to an embodiment of the present invention. FIG. 2 is a schematic diagram of the seawater desulfurization apparatus according to the first embodiment. FIG. 3A is a perspective view of a swirl nozzle. FIG. 3B is a front view of the swirl nozzle. FIG. 3C is a cross-sectional view of a main part of the swirl nozzle. FIG. 4 is a schematic diagram of another seawater desulfurization apparatus according to the first embodiment. FIG. 5 is a perspective view of the inward annular nozzle. FIG. 6 is a perspective view of a collision portion installed inside the inward annular nozzle. FIG. 7 is a perspective view of a discharge header having a plurality of small diameter nozzles. FIG. 8 is a perspective view of the slit nozzle. FIG. 9 is a perspective view of an annular jet nozzle. FIG. 10 is a perspective view in which a collision part is installed in the ejection part. FIG. 11A is a front view of a discharge pipe having a convex portion inside the discharge port. FIG. 11B is a front view of a discharge pipe having a recess inside the discharge port. FIG. 12 is a front view of a collision plate having a circular hole installed at a discharge port for desulfurization drainage. FIG. 13 is a front view of a collision plate having a slit portion installed at a discharge port of desulfurization drainage. FIG. 14A is a cross-sectional view of an orifice nozzle having an orifice therein. FIG. 14B is a cross-sectional view of an orifice nozzle having two stages of orifices therein. FIG. 15 is a schematic view of an ejector having an orifice. FIG. 16 is a schematic view of the venturi mechanism. FIG. 17 is a schematic view of a peripheral jet jet pump. FIG. 18 is a schematic view showing an arrangement structure of two types of fluid diffusion devices.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited by this Example, Moreover, when there exists multiple Example, what comprises combining each Example is also included.

FIG. 1 is a schematic view showing a ship according to an embodiment of the present invention. A ship 1 according to an embodiment of the present invention is, for example, a super-large ship in which an exhaust gas amount of a main engine (exhaust gas amount at 100% load) exceeds 200,000 Nm ³ / h. In the illustrated embodiment, the ship 1 is an ultra-large container ship having a container loading capacity of 10,000 TEU or more called ULCS (Ultra Large Container Ship). As shown in FIG. 1, a marine vessel desulfurization apparatus (hereinafter also referred to as “seawater desulfurization apparatus”) 10A according to the present embodiment includes a sulfur oxide-containing (not shown) diesel engine (D / E) from an exhaust gas line L. ₁₁ is brought into contact with seawater 12, sulfur oxides contained in the exhaust gas 11 are contained in seawater 12 to form desulfurization waste water 14, and desulfurization absorption tower 13 for desulfurization of the exhaust gas 11, and seawater 12 is desulfurized. Seawater introduction line L ₁ to be introduced into the absorption tower 13, desulfurization drainage discharge line L ₂ connected to the desulfurization absorption tower 13 and discharging desulfurization drainage 14 that has absorbed sulfur oxides from the desulfurization absorption tower 13, and desulfurization drainage discharge A fluid diffusing device 15 provided on the stern discharge port side of the line L ₂ and diffusing the desulfurized waste water 14 to the outside of the ship. Here, in the present embodiment, the fluid diffusion device 15 is installed on the stern outlet side of the hull 201, but the present invention is not limited to this, and the seawater intake 202 of the seawater intake 202 is directed toward the traveling direction. On the rear side, it can be installed on one or both sides of the hull 201 to diffuse the desulfurized drainage 14 out of the ship. In this embodiment, the desulfurization absorption tower 13 is installed on the deck of the hull 201. However, the present invention is not limited to this and can be installed under the deck inside the hull 201.

In the seawater desulfurization apparatus 10A, using the bow side of the seawater intake seawater 12 introduced from the inlet 202 by the pump P ₁ of the hull 201, which absorbs sulfur oxides in the exhaust gas 11 in the desulfurization absorption tower 13, it is purified exhaust gas 11 is discharged from the chimney 16 to the outside via the exhaust gas discharge line L _12. In FIG. 1, reference numeral 200 denotes the sea surface. In this embodiment, seawater is taken from the seawater intake 202 on the bow side, but the present invention is not limited to this, and one side of the hull 201 is ahead of the discharge port in the traveling direction. Sea water 12 can be taken from outside by installing intakes on the side or both sides or the bottom of the ship.

  FIG. 2 is a schematic view of a seawater desulfurization apparatus according to the present embodiment. 10 A of seawater desulfurization apparatuses introduce | transduce the exhaust gas 11 containing a sulfur oxide into the desulfurization absorption tower 13 which makes the waste gas 11 containing sulfur oxide contact the seawater 12, and desulfurizes this exhaust gas 11, and the desulfurization absorption tower 13 In the exhaust gas inlet 13a and in the desulfurization absorption tower 13, a seawater nozzle 17 is provided above the exhaust gas inlet 13a to spray or eject seawater 12 and create a flow opposite to the exhaust gas 11 introduced from the exhaust gas inlet 13a and moving upward. And the seawater 12a sprayed or ejected from the seawater nozzle 17 falls, and the grid 18 which contacts the waste gas 11 in a grid channel | path is comprised. In addition, a filler can be arrange | positioned in a grid channel | path and contact efficiency can also be improved.

The desulfurization absorption tower 13 of the present embodiment is a grid type absorption tower in which the exhaust gas 11 and the seawater 12 are brought into contact with each other and sulfur oxide (SO _X ) contained in the exhaust gas 11 is desulfurized from the exhaust gas 11. The present invention is not limited to this, and for example, a liquid column type absorption tower, a spray type absorption tower or the like in which the exhaust gas 11 and the seawater 12 are in contact can be used.

  An exhaust gas inlet 13 a into which the exhaust gas 11 discharged after the combustion reaction in the diesel engine (D / E) is introduced is provided on the side surface from the lower side from the center of the desulfurization absorption tower 13. The exhaust gas 11 introduced from the exhaust gas inlet 13 a moves upward in the desulfurization absorption tower 13, comes into contact with the seawater 12, and is then discharged from an exhaust gas outlet 13 b provided at the top of the desulfurization absorption tower 13.

The seawater introduction line L ₁ is a side surface of the desulfurization absorption tower 13 and is connected above the exhaust gas inlet 13a. The seawater introduction line L ₁ supplies seawater 12 to the desulfurization absorption tower 13. In this embodiment, the seawater 12 supplied from the seawater inlet 202 by the pump P ₁ is introduced into the desulfurization absorption tower 13 by the pump P ₁ through the seawater inlet line L _1. The seawater 12 introduced into the desulfurization absorption tower 13 is sprayed or ejected upward from the seawater nozzle 17. Here, the seawater nozzle 17 is provided at a predetermined position of the piping of the desulfurization absorption tower 13 connected to seawater inlet line L _1.

  After the seawater 12a sprayed or ejected from the seawater nozzle 17 reaches a predetermined height, it naturally falls downward, contacts the exhaust gas 11 in the grid 18 and absorbs sulfur oxides in the exhaust gas 11, A pool 19 of spent seawater 12b is formed in the desulfurization absorption tower 13. When the blown up seawater 12 falls downward from a predetermined height, it comes into gas-liquid contact with the exhaust gas 11 that moves upward in the desulfurization absorption tower 13 so that the exhaust gas 11 can be efficiently desulfurized. . As a result, the exhaust gas 11 introduced into the desulfurization absorption tower 13 is converted into purified gas 11A by being subjected to seawater desulfurization. Here, the predetermined blowing height of the sprayed or spouted seawater can be appropriately selected according to, for example, the size of the desulfurization absorption tower 13, the amount of exhaust gas treated, the amount of seawater used. The seawater nozzle 17 can be sprayed or dropped in the form of droplets as it is.

At this time, in the desulfurization absorption tower 13, sulfur oxides are absorbed by the reaction represented by the following formula (I), and used seawater 12b containing sulfite ions (HSO ₃ ⁻ ) and hydrogen ions (H ⁺ ). Occurs.
SO ₂ (G) + H ₂ O → H ₂ SO ₃ (L) → HSO ₃ ⁻ + H ⁺ (I)

The used seawater 12b as desulfurization effluent 14, through the desulfurization effluent discharge line L _2, via a fluid diffuser 15 provided in the aft outlet side released to the waters overboard. In the present embodiment, the fluid diffusion device 15 is installed on the stern outlet side, but the present invention is not limited to this, and it is installed on one side or both sides of the hull so that desulfurization drainage is provided. 14 can be diffused out of the ship.

3A to 3C show a swirl nozzle that is an example of a fluid diffusion device. FIG. 3A is a perspective view of a swirl nozzle. FIG. 3B is a front view of the swirl nozzle. FIG. 3C is a cross-sectional view of a main part of the swirl nozzle. As shown in FIGS. 3A to 3C, the swirl nozzle 30 is provided at the discharge port of the desulfurization drainage discharge line L ₂ , and has a plurality of swirlers 33 between the cylindrical portion 31 and the center portion 32. As shown in FIG. 3C, the swirler 33 has a predetermined angle (α) and generates a swirling flow when the desulfurization waste water 14 that is a fluid passes through.

Seawater desulfurization apparatus 10A, a swirl nozzle 30 as a fluid diffuser 15, by installing the outlet of the desulfurization effluent discharge line L _2, it is possible to discharge the desulfurization effluent 14 for injecting a swirling flow. And when it ejects from the swirl nozzle 30, the potential core of an ejection flow is spread | diffused, mixing with external seawater can be accelerated | stimulated, and dilution with seawater outside a ship can be implemented efficiently. As a result, the desulfurization effluent 14 is not diluted in the ship, and the seawater 12 is introduced into the hull only by the seawater used in the desulfurization absorption tower 13. Installation of a pump for introducing the seawater for dilution, dilution tank for dilution Is no longer installed. Moreover, even when it is necessary to dilute the desulfurization waste water 14, the use amount of seawater required for the dilution can be reduced by using the fluid diffusion device 15 and the dilution tank in combination.

  According to the present embodiment, by installing the swirl nozzle 30 as the fluid diffusion device 15, when the desulfurization drainage 14 is ejected outside the ship, the potential core can be extinguished at a short distance, and the desulfurization drainage outlet The regulated pH value (for example, pH 6.5) at a predetermined distance (for example, a point 4 m from the drain outlet) to the pH regulation point can be sufficiently satisfied. Here, the potential core refers to a region where the discharge speed of the desulfurization drainage does not attenuate from the discharge port of the desulfurization drainage downstream. Therefore, in this region, the desulfurization drainage discharged from the discharge port is a region where it does not mix with the surrounding external seawater.

  In the present embodiment, a single swirl is used, but the present invention is not limited to this, and a swirl nozzle is provided with a multi-stage swirler that generates different swirl directions for the inner swirler and the outer swirler. May be. This can further promote the diffusion of the desulfurized waste water.

FIG. 4 is a schematic view of another seawater desulfurization apparatus according to the present embodiment. As shown in FIG. 4, another seawater desulfurization apparatus 10B according to this embodiment is provided with line mixer 20 is diluted part to the desulfurization effluent discharge line L _2. The line mixer 20, diluted seawater line L ₃ for dilution branched from seawater inlet line L ₁ is connected, introduces a part of the seawater 12 branched via the dilution pump P ₂ in the line mixer 20 . Then, the desulfurization waste water 14 and the seawater 12 for dilution are mixed by the line mixer 20, and the mixed diluted desulfurization waste water 14 </ b> A is diffused outside the ship by the fluid diffusion device 15. In the present embodiment, as shown in FIG. 4, the seawater 12 supplied to the desulfurization absorption tower 13 and the seawater 12 that dilutes the desulfurized seawater 14 are taken from the same intake port. It is not limited to this, It can also be made to take in from each different water intake.

  In the seawater desulfurization apparatus 10A according to FIG. 2, the desulfurization wastewater 14 is discharged to the outside without being diluted at all. However, in the seawater desulfurization apparatus 10B according to FIG. 4, the desulfurization wastewater 14 is diluted using the line mixer 20 and discharged. Like to do. This is to cope with, for example, the case where the pH value of the desulfurized waste water 14 becomes lower than a predetermined value (design value) during navigation. Thereby, even when the value of the sulfur oxide in the exhaust gas 11 changes significantly according to the load fluctuation of the diesel engine (D / E), the desulfurized waste water 14 is discharged as it is without being discharged as it is. Therefore, it is possible to comply with the release in accordance with the regulations. When supplying the seawater 12 for dilution, the dilution amount of the desulfurization waste water 14 is appropriately changed according to the pH of the discharge port of the desulfurization waste water 14. Further, instead of the line mixer 20, a separate dilution tank may be installed and diluted and mixed, and then the diluted diluted desulfurization waste water 14A may be discharged.

  By installing any one of the seawater desulfurization apparatuses 10A and 10B according to the present embodiment in the hull 201 of the ship, when discharging the desulfurization drainage 14 from the stern of the hull 201, the potential core of the jet flow of the desulfurization drainage 14 is a short distance. Can be extinguished. Thereby, the regulation pH value can be satisfied within a predetermined distance from the outlet of the desulfurization waste water 14 to the pH regulation point.

Next, another example of the fluid diffusion device will be described. FIG. 5 is a perspective view of the inward annular nozzle. FIG. 6 is a perspective view of a collision portion installed inside the inward annular nozzle. The fluid diffusion device according to the present embodiment is an inward annular nozzle that is provided at the discharge port of the desulfurization drain discharge line L ₂ and discharges the desulfurization drain 14 to be discharged inward. The inward annular nozzle 35 has the tip 35a of the nozzle ejection portion facing inward, and a conical collision portion 36 is disposed on the axis of the potential core inside the ejection portion.

  By installing the inward annular nozzle 35, the discharge flow of the desulfurization drainage 14 when discharged outside the ship is discharged as an inward swirl flow that collides with each other, so that the seawater outside the ship and the desulfurization drainage are mixed. And the potential core can be extinguished at a short distance.

  Moreover, as shown in FIG. 6, by providing the swirl swirler 37 in the collision part 36 installed in the inside of the ejection part, the ejection flow is swirled, and the swirl flow of the desulfurization waste water 14 is discharged while increasing. Thereby, mixing with the seawater outside a ship and the desulfurization waste_water | drain 14 can be accelerated | stimulated, and a potential core can be extinguished at a short distance.

Next, another example of the fluid diffusion device will be described. FIG. 7 is a perspective view of a discharge header having a plurality of small diameter nozzles. The fluid diffusion apparatus according to the present embodiment, is provided at the outlet of the desulfurization effluent discharge line L _2, those provided with a plurality of small diameter discharge pipe 41 for discharging the desulfurized effluent 14 as small volume discharge header 42. By installing the small-diameter discharge pipe 41, the point of disappearance of the potential core (distance from the discharge pipe 41) determined by the diameter (d) of the small-diameter pipe 41 is shortened. The total cross-sectional area of the small-diameter discharge pipe 41 is set to be equal to the cross-sectional area of one large-diameter nozzle.

In the fluid diffusion device according to the present embodiment, the discharge header 42 is provided with a plurality of small-diameter discharge pipes 41 for discharging the desulfurization drainage 14 with a small capacity, thereby shortening the potential core of the jet flow of the desulfurization drainage 14 to the outside of the ship. quenched at a distance, the regulation pH value in a predetermined distance (4m point from eg water outlet) from the outlet of the desulfurization effluent discharge line L ₂ until the pH regulating point (e.g. pH 6.5), can be sufficiently satisfied.

Next, another example of the fluid diffusion device will be described. FIG. 8 is a perspective view of the slit nozzle. The fluid diffusion device according to the present embodiment is a slit nozzle that is provided at the discharge port of the desulfurization drainage discharge line L ₂ and discharges the desulfurization drainage 14 to be discharged from the flat discharge port. The slit nozzle 45 is provided with a slit-like flat discharge port 46 at the tip.

  By installing the slit nozzle 45, the jet flow of the desulfurization drainage 14 to the outside of the ship is concentrated at the slit-like flat discharge port 46, and then jetted to the outside as a flat jet flow. It can promote extinction.

Next, another example of the fluid diffusion device will be described. FIG. 9 is a perspective view of an annular jet nozzle. The fluid diffusion device according to the present embodiment is an annular jet nozzle that is provided at the outlet of the desulfurization drainage discharge line L ₂ and ejects an annular jet. The annular jet nozzle 51 includes a nozzle cylinder body 52 from which the desulfurization drainage 14 in the nozzle cylinder body 52 is ejected, and a solid cylindrical portion 53 at the center of the nozzle cylinder body 52 in the axial direction.

  By installing this annular jet nozzle 51, a solid cylindrical portion 53 is installed at the central portion where the concentration of the desulfurization drainage 14 is highest, and an annular flow of the desulfurization drainage 14 is generated and diffused into the seawater 12. Can be promoted. Since the annular desulfurization waste water 14 is discharged, the contact area with the surrounding seawater after discharge is increased, diffusion mixing is improved, and the disappearance of the potential core can be promoted.

Next, another example of the fluid diffusion device will be described. FIG. 10 is a perspective view in which a collision part is installed in the ejection part. In the fluid diffusion device according to the present embodiment, a conical collision portion 56 is disposed in the vicinity of the discharge port 55 of the desulfurization drainage discharge line L _{2 with} a predetermined distance.

By disposing the conical collision portion 56 in the vicinity of the discharge port 55 of the desulfurization drainage discharge line L _{2 at} a predetermined distance, the thickness of the flow of the desulfurization drainage 14 is reduced and the collision with the collision portion 56 is prevented. The vortex 57 generated at the time promotes agitation between the seawater outside the ship and the desulfurization effluent, and the potential core can be extinguished at a short distance.

Next, another example of the fluid diffusion device will be described. FIG. 11A is a front view of a discharge pipe having a convex portion inside a desulfurization drain outlet. FIG. 11B is a front view of a discharge pipe having a recess inside the desulfurization drain discharge port. As shown in FIG. 11A, as the fluid diffusion apparatus according to the present embodiment, a discharge pipe 63A having a convex portion 62A to the inside of the discharge port 61 of the desulfurization effluent discharge line L _2. Further, as shown in FIG. 11B, as the fluid diffusion apparatus according to the present embodiment, an exhaust pipe 63B having recesses 62B in the interior of the discharge port 61 of the desulfurization effluent discharge line L _2.

By installing the dimple surface of the projection 62A or recesses 62B inside the outlet of the discharge port 61 of the desulfurization effluent discharge line L _2, by promoting the stirring to generate a resistance fluidic flow of fluid desulfurization effluent 14, It can promote mixing of seawater and desulfurization wastewater out of the ship, and can eliminate the potential core in a short distance. In addition, it may be made to have both the convex part 62A or the recessed part 62B inside, and may make it generate | occur | produce the resistance flow which the convex part 62A and the recessed part 62B mixed.

Next, another example of the fluid diffusion device will be described. FIG. 12 is a front view of a collision plate having a circular hole installed at a discharge port for desulfurization drainage. The fluid diffusion device according to the present embodiment is a collision plate 72 provided at the discharge port of the desulfurization drainage discharge line L ₂ and having a circular hole 71. FIG. 13 is a front view of a collision plate having a slit portion installed at a desulfurization drain outlet. The fluid diffusion device according to the present embodiment is a collision plate 74 provided at the discharge port of the desulfurization drainage discharge line L ₂ and having a slit portion 73.

By installing collision plates 72 and 74 having circular holes 71 or slit portions 73 at the discharge port of the desulfurization drainage discharge line L ₂ , the flow of the fluid of the desulfurization drainage 14 is promoted when passing through the pores. Therefore, mixing of seawater and desulfurization drainage outboard can be promoted, and the potential core can be extinguished at a short distance.

Next, another example of the fluid diffusion device will be described. FIG. 14A is a cross-sectional view of an orifice nozzle having an orifice therein. The fluid diffusion device according to this embodiment is an orifice nozzle 76 provided at the discharge port of the desulfurization drainage discharge line L ₂ and having an orifice 75 inside. The orifice nozzle 76 has an orifice 75 in the discharge port.

  The orifice nozzle 76 is provided with an orifice 75 inside, and the stirring is promoted by the disturbance of the jet flow when passing through the orifice 75, thereby promoting the mixing of the seawater and desulfurization drainage out of the ship, and the potential core is shortened. Can be extinguished.

  FIG. 14B is a cross-sectional view of an orifice nozzle having two stages of orifices therein. As shown in FIG. 14B, by providing two stages of orifices 75A and 75B inside the orifice nozzle 76, a swirl flow is given to the jet flow, and further the stirring flow of the desulfurized waste water 14 is discharged while increasing, so that the outboard The mixing of seawater and desulfurization wastewater can be promoted, and the potential core can be extinguished at a short distance.

Next, another example of the fluid diffusion device will be described. FIG. 15 is a schematic view of an ejector having an orifice. As fluid diffusion apparatus according to this embodiment is installed an ejector having an orifice in the middle discharge of desulfurization effluent discharge line L _2. The ejector 80 includes a connection portion 81 connected to the desulfurization drainage discharge line L ₂ , a liquid supply passage 83 communicating with the connection portion 81 and having an orifice 82 formed therein, and an orifice 82 in the liquid supply passage 83. A gas-liquid mixing and stirring device including a diluted seawater introduction passage 85 having an opening 84 in a downstream region. The installation of the ejector 80 may be any of the middle exhaust outlet or desulfurization effluent discharge line L ₂ of the desulfurization effluent discharge line L _2. The diluted seawater introduction path 85 is connected to a diluted seawater introduction line L ₄ for introducing the seawater 12 for dilution from the outside of the ship.

  In the ejector 80, the flow of the desulfurization drainage 14 supplied into the liquid supply passage 83 generates a negative pressure region 86 in the downstream region of the narrow portion of the orifice 82, and the opening from the diluted seawater introduction passage 85 is caused by the contraction effect. The dilution seawater 12 supplied via the section 84 is mixed while being sucked by self-supply, and the mixed fluid is discharged as a jet jet 88 from the discharge port 87 at the tip thereof.

Due to the ejector effect, the seawater 12 for dilution is self-supplied by the discharge power of the desulfurized wastewater 14, mixed with the desulfurized wastewater 14 and discharged as a jet jet 88, thereby promoting mixing of the seawater outside the ship and the jet jet 88. The potential core can be extinguished at a short distance. Therefore, when the ejector 80 of the present embodiment is used as a fluid diffusion device, it is not necessary to install a pump in the diluted seawater introduction line L ₄ . Thereby, reduction of pump power can be aimed at.

Next, another example of the fluid diffusion device will be described. FIG. 16 is a schematic view of the venturi mechanism. As fluid diffusion apparatus according to this embodiment is installed a venturi mechanism 90 in the middle discharge of desulfurization effluent discharge line L _2. The venturi mechanism 90 is provided toward the throat 92 and a suction port 91 connected to the desulfurization drainage discharge line L ₂ , a diffuser 93 communicating with the suction port 91 and having a venturi portion of the throat 92 formed therein. And a mixing chamber 95 having an introduction nozzle 94 for introducing seawater 12 for dilution. The installation of the venturi mechanism 90 may be any of the middle exhaust outlet or desulfurization effluent discharge line L ₂ of the desulfurization effluent discharge line L _2.

  In the venturi mechanism 90, the desulfurization waste water 14 supplied into the throat 92 is throttled in the venturi section to generate a negative pressure region, and dilution seawater supplied through the nozzle 94 by the contraction effect thereof. 12 is mixed while being sucked by self-supply, and the mixed fluid is jetted as a jet jet 97 from the discharge port 96 at the tip thereof.

  Due to the venturi effect, the seawater 12 for dilution is self-supplied by the discharge power of the desulfurized wastewater 14, mixed with the desulfurized wastewater 14, and discharged as a jet jet 97, thereby promoting mixing of the seawater outside the ship and the jet jet 97. The potential core can be extinguished at a short distance.

Next, another example of the fluid diffusion device will be described. FIG. 17 is a schematic view of a peripheral jet jet pump. As fluid diffusion apparatus according to this embodiment is installed the outer peripheral jet type jet pumps currently discharged desulfurization effluent discharge line L _2. This outer peripheral jet pump 100 includes a jet pump mixing chamber 102 having a passage 101 into which dilution seawater 12 is introduced, and a jet pump 103 that ejects a jet of desulfurized waste water 14 from the outer periphery of the jet pump mixing chamber 102. And a gas-liquid mixing and stirring device. The installation of the outer peripheral jet type jet pump 100 may be any of the middle exhaust outlet or desulfurization effluent discharge line L ₂ of the desulfurization effluent discharge line L _2.

  In the peripheral jet jet pump 100, the desulfurized waste water 14 ejected by the jet pump 103 forms a negative pressure region in the jet pump mixing chamber 102, and sucks the dilution seawater 12 supplied by the contraction effect by self-supply. While mixing, the mixed fluid is jetted as a jet jet 105 from the discharge port 104 at the tip.

  The seawater 12 for dilution is self-supplied by the discharge power of the desulfurization drainage 14 by the outer peripheral jet pump 100 and is mixed with the desulfurization drainage 14 and discharged as a jet jet 105. Mixing can be promoted and the potential core can be extinguished at a short distance.

Next, another example of the fluid diffusion device will be described. FIG. 18 is a schematic view showing an arrangement structure of two types of fluid diffusion devices. In addition, about the member same as the Example mentioned above, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted. As shown in FIG. 18, as a fluid diffuser 10C according to the present embodiment, discharge the swirl nozzle 30 of the fluid diffusion apparatus shown in FIG 3A~ Figure 3C according to a first embodiment of the stern side of the desulfurization effluent discharge line L ₂ while installed in the outlet, in which is installed an ejector 80 of the fluid diffusion apparatus shown in FIG. 15 according to example 1 in the middle discharge of desulfurization effluent discharge line L _2.

First, in the ejector 80 of the first fluid diffusion device, the flow of the desulfurization waste water 14 which is disposed in the middle of the discharge of the desulfurization waste water discharge line L ₂ and is supplied into the liquid supply passage 83 is in the downstream area of the narrow portion of the orifice 82. A negative pressure region 86 is generated, and due to the contraction effect, the dilution seawater 12 supplied from the diluted seawater introduction passage 85 via the opening 84 is mixed while being sucked by self-supply, and from the discharge port 87 at the tip thereof. The mixed fluid is jetted as a jet jet 88.

The injected desulfurized waste water 14 is sent to the swirl nozzle 30 which is the second fluid diffusion device via the discharge line L ₅ connected to the ejector 80 and the swirl nozzle 30. Thereby, when the desulfurization waste water 14 which became the jet jet 88 passes the several swirler 33 of the swirl nozzle 30, the swirl flow is generated.

According to the present embodiment, the ejector 80 of the fluid diffusion device according to the first embodiment is arranged in the middle of discharge of the desulfurization drainage discharge line L ₂ to generate the jet jet 88, and then the fluid diffusion device according to the first embodiment. Since the swirl flow of the jet jet 88 is discharged from the discharge port of the desulfurization drainage discharge line L _{2 at} the stern by the swirl nozzle 30 of the stern, it is ejected more than when only the swirl nozzle 30 as in the first embodiment is installed. The potential core of the eruptive flow is rapidly diffused and promotes mixing with external seawater. As a result, a synergistic effect of dilution with seawater outside the ship can be exhibited as compared with the case where each of the fluid diffusion devices is installed alone.

  Similarly, a combination with the fluid diffusion device of FIGS. 7 to 14A and 14B can be used. Further, by combining the fluid diffusion device of FIGS. 5 to 14A and 14B with the venturi mechanism 90 of FIG. 16 or the outer peripheral jet type jet pump 100 of FIG. 11, the fluid diffusion devices are respectively installed alone. The synergistic effect of dilution with seawater outside the ship can be exhibited.

1 Vessel 10A, 10B, 10C seawater desulfurization apparatus 11 flue gas 12 seawater 13 desulfurizing absorption tower 14 desulfurization effluent 15 fluid diffuser 17 seawater nozzle 18 grids 19 liquid used seawater pool L ₁ seawater inlet line L ₂ desulfurization effluent discharge line L ₁₁ Exhaust gas line L ₁₂ Exhaust gas emission line 201 Hull 202 Seawater intake D / E Diesel engine

Claims (16)

A desulfurization absorption tower for contacting exhaust gas containing sulfur oxide with seawater, containing sulfur oxide contained in the exhaust gas in the seawater as desulfurization waste water, and desulfurizing the exhaust gas;
A seawater introduction line for introducing the seawater into the desulfurization absorption tower;
A desulfurization drain discharge line connected to the desulfurization absorption tower and discharging a desulfurization drain that has absorbed sulfur oxide from the desulfurization absorption tower;
A ship desulfurization apparatus, comprising: a fluid diffusion device provided in the desulfurization drainage discharge line and diffusing the desulfurization drainage to the outside of the ship. A diluted seawater line for introducing diluted seawater;
2. The ship according to claim 1, further comprising a dilution section that mixes the desulfurization drainage of the desulfurization drainage discharge line and the diluted seawater of the dilution seawater line, and discharges the diluted desulfurization drainage to the outside of the ship. Desulfurization equipment.   3. The ship desulfurization apparatus according to claim 1, wherein the fluid diffusion device is a swirl nozzle provided at a discharge port of the desulfurization drainage discharge line and discharging the desulfurization drainage discharged as a swirling flow.   3. The ship desulfurization according to claim 1, wherein the fluid diffusion device is an inward annular nozzle that is provided at a discharge port of the desulfurization drain discharge line and discharges the desulfurization drain to be discharged inward. apparatus.   The said fluid diffusion apparatus is provided in the discharge port of the said desulfurization waste_water | drain discharge line, and is provided with two or more small diameter discharge pipes which discharge | emit the said desulfurization waste_water | drain as a small capacity | capacitance. Marine desulfurization equipment.   3. The ship desulfurization apparatus according to claim 1, wherein the fluid diffusion device is a slit nozzle provided at a discharge port of the desulfurization drainage discharge line and having a flat discharge port.   The fluid diffusing device is provided at a discharge port of the desulfurization drainage discharge line, and includes a nozzle cylinder body from which desulfurization drainage is ejected, and an annular nozzle in which a solid cylindrical part is arranged in the axial direction at the center of the nozzle cylinder body. The ship desulfurization apparatus according to claim 1, wherein the ship desulfurization apparatus is provided.   3. The ship desulfurization apparatus according to claim 1, wherein the fluid diffusion device has a collision portion that collides with desulfurization drainage discharged in the vicinity of an outlet of the discharge port of the desulfurization drainage line.   3. The ship desulfurization according to claim 1, wherein the fluid diffusion device is a discharge pipe having one or both of a concave portion and a convex portion inside an outlet of a discharge port of the desulfurization drain discharge line. apparatus.   3. The ship desulfurization apparatus according to claim 1, wherein the fluid diffusion device is a collision plate provided at a discharge port of the desulfurization drainage discharge line and having circular or slit-shaped pores.   3. The ship desulfurization apparatus according to claim 1, wherein the fluid diffusion device is an orifice nozzle provided at an outlet of the desulfurization drainage discharge line and having an orifice therein. 4.   3. The ship desulfurization apparatus according to claim 1, wherein the fluid diffusion device is an ejector provided with an outlet of the desulfurization drainage discharge line or in the middle of discharge of the desulfurization drainage discharge line and having an orifice. .   3. The ship desulfurization apparatus according to claim 1, wherein the fluid diffusion device includes a venturi mechanism in the middle of the discharge of the desulfurization drainage discharge line or the desulfurization drainage discharge line.   3. The ship desulfurization apparatus according to claim 1, wherein the fluid diffusion device includes a jet pump in the discharge port of the desulfurization drainage discharge line or in the middle of discharge of the desulfurization drainage discharge line.   A marine vessel equipped with the marine vessel desulfurization device according to any one of claims 1 to 14. The first fluid diffusion device according to any one of claims 3 to 10, provided at an outlet of the desulfurization drainage discharge line,
A ship provided with the second fluid diffusion device according to any one of claims 11 to 14 provided in the middle of discharge of the desulfurization drainage discharge line.

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