Scrubber having guide shape

Abstract

Disclosed is a scrubber having a guide shape, comprising: a scrubber main body having an inlet formed in a front surface through which exhaust gas from a ship engine is introduced and an outlet, formed in an upper end, for exhaust gas that has passed through an internal space, so as to remove greenhouse gas from the exhaust gas by means of seawater injection; an exhaust gas guide unit comprising a rear plate coupled to a rear end of the inlet to form an inflow space for the exhaust gas and configured to guide the exhaust gas introduced through the inlet downward, and side plates coupled to respective sides of the rear plate; and a guide shape formed at a predetermined height from an upper end of a bottom plate of the scrubber main body to uniformly diffuse the exhaust gas guided downward by the exhaust gas guide unit into the internal space and cause same to be discharged through the outlet, whereby the scrubber minimizes accumulation or stagnation of the exhaust gas inside the scrubber main body.

Description

Scrubber with guide shape

[0001] The present invention relates to a scrubber having a guide shape that minimizes accumulation or stagnation of exhaust gas inside the scrubber body.

[0002] Recently, global warming and related environmental disasters are occurring due to the greenhouse gas emissions caused by the indiscriminate use of fossil fuels.

[0003] Accordingly, a series of technologies related to capturing and storing carbon dioxide, a representative greenhouse gas, without emitting it, are called CCS (Carbon Dioxide Capture and Storage) technologies and have recently received a lot of attention. Among CCS technologies, chemical absorption is the most commercialized technology in terms of its ability to process on a large scale.

[0004] In addition, carbon dioxide emissions are regulated through the IMO's EEDI, and since emissions must be reduced by 40% from 2008 levels by 2030, technologies that do not emit CO2 or capture emitted CO2 are attracting attention, and the goal is to reduce emissions by more than 50% from 2008 levels by 2050.

[0005] The aforementioned technologies for reducing carbon dioxide emissions or capturing carbon dioxide generated have not yet been commercialized on ships, and methods for using hydrogen or ammonia as fuel are currently under development, but have not yet reached the commercialization level.

[0006] Meanwhile, as a way to reduce sulfur oxides in exhaust gas from ships, there is a plan to use MGO, which is a high-grade fuel with SOx of 0.5% or less, but this plan has the disadvantage of increasing OPEX due to the use of high-grade fuel. There is a plan to apply LNG Fueled Ship, but in this plan, although it is a system that uses LNG as a raw material, the initial CAPEX is too high, and even considering the OPEX of using high-grade fuel, the payback period is 15 to 20 years, making it unrealistic. In addition, an exhaust gas cleaning system (EGCS), which has an initial installation cost but is realistic with a payback period of less than 3 years even considering the OPEX of using high-grade fuel, is emerging as an alternative.

[0007] Accordingly, a technology is required that can more efficiently improve the flow structure of exhaust gas in an exhaust gas purification system to enable smooth exhaust gas discharge.

[0008] (Patent Document 1) Korean Patent Publication No. 10-1895192 (Venturi Integrated Scrubber Device, September 4, 2018)

[0009] The technical problem to be achieved by the present invention is to provide a scrubber having a guide shape that can allow exhaust gas to flow smoothly without stagnation or accumulation, without being concentrated to one side, and with minimal occurrence of cavitation.

[0010] In order to achieve the above-described object, an embodiment of the present invention provides a scrubber having a guide shape, including: a scrubber body having an inlet formed at the front through which exhaust gas from a ship engine flows in, and an outlet formed at the top through which exhaust gas passing through an internal space is discharged, thereby removing greenhouse gases from the exhaust gas by seawater injection; an exhaust gas guide portion, which is coupled to a rear end of the inlet to form an exhaust gas inlet space, and is formed opposite the inlet to guide downward the exhaust gas flowing in through the inlet, and which is composed of side plates respectively coupled to both sides of the rear plate; and a guide shape formed at a predetermined distance from a lower end of the exhaust gas guide portion and at a predetermined height from an upper end of a bottom plate of the scrubber body to uniformly spread exhaust gas guided downward by the exhaust gas guide portion into the internal space and discharge it through the outlet.

[0011] Here, the guide shape may be composed of a first branch plate formed symmetrically inclined to guide exhaust gas outward from the side plate at the bottom of the exhaust gas guide portion, and a second branch plate formed inclined to guide exhaust gas outward from the bottom of the exhaust gas guide portion to the rear plate.

[0012] In addition, the guide shape may be configured with a first branch plate having an arc-shaped cross-section structure to guide exhaust gas outwardly from the side plate at the bottom of the exhaust gas guide portion, and a second branch plate formed in a streamlined shape to guide exhaust gas outwardly from the bottom of the exhaust gas guide portion to the rear plate.

[0013] Additionally, a nozzle section that sprays seawater downward may be formed inside the exhaust gas induction section.

[0014] Additionally, one or more column packings may be formed between the outer side of the exhaust gas induction unit and the inner side of the scrubber body.

[0015] According to the present invention, there is an effect that exhaust gas can be smoothly discharged into the atmosphere without stagnation or accumulation, without being concentrated to one side, and with minimal cavitation.

[0016] FIG. 1 illustrates a scrubber having a guide shape according to an embodiment of the present invention.

[0017] Fig. 2 is a separate example of the exhaust gas induction section and guide shape of a scrubber having the guide shape of Fig. 1.

[0018] Fig. 3 illustrates the front structure of a scrubber having the guide shape of Fig. 1.

[0019] Figures 4 and 5 illustrate the flow analysis results of a scrubber having the guide shape of Figure 1, respectively.

[0020] <Explanation of symbols>

[0021] 110: Scrubber body 111: Inlet

[0022] 112: exhaust port 113: bottom plate

[0023] 114: Injection nozzle 120: Exhaust gas induction section

[0024] 121: Back plate 122: Side plate

[0025] 130: Guide shape 131: First quarter plate

[0026] 132: 2nd Quarter Plate 133: 1st Quarter Plate

[0027] 134: Second Quarter Plate

[0028] Hereinafter, an embodiment of the present invention having the above-described features will be described in more detail with reference to the attached drawings.

[0029] A scrubber having a guide shape according to an embodiment of the present invention comprises: a scrubber body (110) having an inlet (111) formed at the front through which exhaust gas from a ship engine flows in, and an outlet (112) formed at the top through which exhaust gas passing through an internal space (A) is discharged, so as to remove greenhouse gases from exhaust gas by seawater injection; a rear plate (121) coupled to the rear end of the inlet (111) to form an inlet space (B) for exhaust gas, formed facing the inlet (111) to guide downward the exhaust gas flowing in through the inlet (111), and an exhaust gas guide portion (120) composed of side plates (122) coupled to each of both sides of the rear plate (121); and a bottom plate (113) formed at a predetermined distance from the bottom of the exhaust gas guide portion (120) and at a predetermined height from the top of the bottom plate (113) of the scrubber body (110) to guide the exhaust gas The purpose is to minimize exhaust gas accumulation or stagnation inside the scrubber body (110), including a guide shape (130) that uniformly spreads exhaust gas guided downward by the guide section (120) into the internal space (A) and discharges it through the exhaust port (112).

[0030] Hereinafter, with reference to the drawings, a scrubber having a guide shape of the above-described configuration will be specifically described as follows.

[0031] First, referring to FIG. 1, the scrubber body (110) is formed with one or more inlets (111) formed at the front through which exhaust gas from a ship engine (not shown) flows in, in a large vessel such as an LNG ship or an oil tanker, and an outlet (112) formed at the top through which exhaust gas passing through an internal space (A) is discharged, so that the exhaust gas flows from the inlet (111) to the outlet (112), and greenhouse gases are removed from the exhaust gas by spraying seawater on the exhaust gas.

[0032] Next, the exhaust gas induction unit (120), referring to FIGS. 1 and 2, is formed by a rear plate (121) that is coupled to the rear end of the inlet (111) to form an exhaust gas inlet space (B), facing the inlet (111) and guiding the exhaust gas flowing in through the inlet (111) downward, and side plates (122) that are coupled to each side of the rear plate (121).

[0033] Here, the upper part of the rear plate (121) is formed as a curved plate with a certain radius of curvature, and the lower part is formed as a flat plate, so that exhaust gas flowing in the horizontal direction can be guided downward.

[0034] Next, the guide shape (130), with reference to FIGS. 1 and 2, is formed at a certain height from the top of the bottom plate (113) of the scrubber body (110) at a certain distance from the bottom of the exhaust gas induction unit (120) so as to uniformly spread the exhaust gas guided downward by the exhaust gas induction unit (120) into the internal space (A) and discharge it to the discharge port (112), thereby minimizing the exhaust gas from being concentrated to one side or the occurrence of cavitation in the internal space (A) of the scrubber body (110), so that the cleaning water, such as seawater, sprayed from the spray nozzle (114) (see FIG. 3) formed at the top of the internal space (A) of the scrubber body (110) can be uniformly spread into the exhaust gas and effectively cleaned.

[0035] Specifically, as illustrated in (a) and (b) of FIG. 2, the guide shape (130) may be composed of a pair of first branch plates (131) formed symmetrically inclined to guide exhaust gas outward from the side plate (122) at the bottom of the exhaust gas guide portion (120) to the internal space (A), and a second branch plate (132) formed inclined to guide exhaust gas outward from the bottom of the exhaust gas guide portion (120) to the internal space (A) of the rear plate (121) (see (b) of FIG. 1).

[0036] Alternatively, as illustrated in (c) of FIG. 2, the guide shape (130) may be composed of a first branch plate (133) having an arc-shaped cross-section structure to guide exhaust gas outward from the side plate (122) at the bottom of the exhaust gas guide portion (120) to the internal space (A), and a second branch plate (134) formed in a streamlined shape to guide exhaust gas outward from the bottom of the exhaust gas guide portion (120) to the internal space (A) of the rear plate (121).

[0037] In addition, a nozzle part (not shown) that sprays seawater downward is formed inside the exhaust gas induction part (120), thereby inducing the exhaust gas downward while reducing SO X It can be cleaned by removing particle components such as water and suits.

[0038] In addition, one or more stages of column packing may be formed between the outer side of the exhaust gas induction unit (120) and the inner side of the scrubber body (110). For example, the column packing may be configured in multiple stages and designed to have a large contact area per unit volume. The column packing may be selected to be appropriate for the process by considering the contact area per unit area and the pressure drop and overflow velocity of the gas. A solution redistributor (not shown) may be formed between the multi-stage column packing to prevent a channeling phenomenon.

[0039] Meanwhile, FIGS. 4 and 5 illustrate the flow analysis results of a scrubber having the guide shape of FIG. 1, respectively. Referring to these, FIG. 4 (a) illustrates a streamline of a scrubber having a guide shape (130), and FIG. 4 (b) illustrates a streamline of a scrubber without a guide shape (130). Compared to (b), (a) enables smooth discharge through an exhaust port (112) by allowing the exhaust gas to flow smoothly without stagnation or accumulation, without being concentrated to one side, and with minimal cavitation.

[0040] In addition, (a) of FIG. 5 illustrates a velocity field of a scrubber with a guide shape (130), and (b) illustrates a velocity field of a scrubber without a guide shape (130). Compared to (b), (a) allows the exhaust gas to flow smoothly without stagnation or accumulation, thereby enabling smooth discharge through the exhaust port (112).

[0041] Therefore, by configuring a scrubber having a guide shape as described above, it is possible to ensure that the exhaust gas flows smoothly without stagnation or accumulation, without being concentrated to one side, and with minimal cavitation, thereby enabling smooth discharge into the atmosphere.

[0042] The embodiments described in this specification and the configurations illustrated in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that there may be various equivalents and modified examples that can replace them at the time of filing this application.

Claims

1. A scrubber body having an inlet formed at the front through which exhaust gas from a ship engine flows in, and an outlet formed at the top through which exhaust gas passing through an internal space is discharged, thereby removing greenhouse gases from exhaust gas by spraying seawater; An exhaust gas induction unit, which is formed by connecting the rear end of the inlet port to form an inlet space for exhaust gas, and is formed facing the inlet port to guide the exhaust gas flowing in through the inlet port downward, and is composed of side plates connected to each side of the rear plate; and A guide shape is formed at a certain height from the top of the bottom plate of the scrubber body and spaced apart from the lower portion of the exhaust gas induction section by a certain distance, so that the exhaust gas guided downward by the exhaust gas induction section is uniformly spread into the internal space and discharged through the outlet. The upper part of the above rear plate is formed as a curved plate with a certain radius of curvature, and the lower part is formed as a flat plate. The above guide shape is composed of a first branch plate symmetrically formed to branch and guide exhaust gas in an outward direction from the side plate at the bottom of the exhaust gas guide portion, and a second branch plate formed to be inclined to guide exhaust gas in an outward direction from the bottom of the exhaust gas guide portion to the rear plate. A nozzle section that sprays seawater downward is formed inside the exhaust gas induction section. Characterized in that one or more column packings are formed between the outer side of the exhaust gas induction unit and the inner side of the scrubber body. Scrubber with guide shape.

2. In paragraph 1, The above guide shape is characterized in that it is composed of a first branch plate having an arc-shaped cross-section structure to guide the exhaust gas outwardly from the side plate at the bottom of the exhaust gas guide portion, and a second branch plate formed in a streamlined shape to guide the exhaust gas from the bottom of the exhaust gas guide portion in the outward direction of the rear plate. Scrubber with guide shape.

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