CN117881599A

CN117881599A - Exhaust gas purifying device and ship

Info

Publication number: CN117881599A
Application number: CN202180101852.8A
Authority: CN
Inventors: 中山伸; 朝长康则
Original assignee: Mitsubishi Shipbuilding Co Ltd
Current assignee: Mitsubishi Shipbuilding Co Ltd
Priority date: 2021-11-02
Filing date: 2021-11-02
Publication date: 2024-04-12
Also published as: WO2023079591A1; KR20240033074A

Abstract

An exhaust gas purifying device is provided with: the purification device main body is arranged in the shell; a plurality of floor materials which are arranged around the purification device main body in the shell along the vertical direction in a separated way; and a gas sensor unit provided at a level between a pair of floor materials adjacent to each other in the up-down direction, the gas sensor unit including a unit frame for accommodating the internal equipment, a suction port for sucking air from the outside of the unit frame to the inside, and a discharge port for discharging air from the inside of the unit frame to the outside, the floor material on the lower side having a lower opening portion penetrating the floor material in the up-down direction in a portion below the gas sensor unit, and the exhaust gas purification apparatus further including an air supply portion for sucking air from the suction port of the gas sensor unit into the unit frame to cool the internal equipment and discharging air from the discharge port to above the floor material on the upper side.

Description

Exhaust gas purifying device and ship

Technical Field

The present invention relates to an exhaust gas purifying device and a ship.

Background

In ships, it is desirable to reduce Sulfur Oxides (SO) contained in exhaust gas generated by burning fuel _x ) Or Nitrogen Oxides (NO) _x ). Patent document 1 discloses a ship provided with an exhaust gas purification system for reducing nitrogen oxides contained in exhaust gas. The exhaust gas purification system of patent document 1 is disposed laterally to a cabin shed provided on an upper deck at a stern.

Technical literature of the prior art

Patent literature

Patent document 1: japanese patent laid-open No. 2017-217982

Disclosure of Invention

Technical problem to be solved by the invention

However, in the exhaust gas purification system as described in patent document 1, there is a case where a gas sensor unit for detecting the residual amount of sulfur oxides or nitrogen oxides in the purified exhaust gas is provided. This gas sensor unit sucks a part of the high-temperature exhaust gas after the purification treatment. Therefore, most of the gas sensor units are disposed in the vicinity of a chimney or an exhaust gas purification system for discharging exhaust gas to the outside of the ship, and the temperature of the surroundings thereof is liable to be high. The gas sensor unit is disposed in a building provided in the hull so as not to be wetted by rainwater or the like. Therefore, heat is easily accumulated around the gas sensor unit. That is, the gas sensor unit is easily placed in a high temperature environment. However, the following problems exist: in an internal device such as a sensor or a control board provided in the gas sensor unit, the frequency of false actuation or malfunction may be increased in a high-temperature environment.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an exhaust gas purifying device and a ship capable of preventing erroneous activation or malfunction of a gas sensor unit and continuing an activated state.

Means for solving the technical problems

In order to solve the above problems, an exhaust gas purifying apparatus according to the present invention is an exhaust gas purifying apparatus for purifying exhaust gas discharged from an internal combustion engine of a ship, and includes a purifying apparatus main body, a housing, and a gas sensor unit. The purification device body is provided in a housing provided on the ship, and has a purification unit that purifies exhaust gas discharged from the internal combustion engine. And a housing having a plurality of flooring materials which are provided so as to be separated in the vertical direction so as to form a plurality of stages around the purification apparatus main body, and which covers at least the purification apparatus main body. The gas sensor unit is disposed between a pair of the floor materials adjacent in the up-down direction. The gas sensor unit includes an internal device and a unit housing. The unit frame accommodates the internal device. The unit frame has a suction port for sucking air from the outside to the inside and a discharge port for discharging air from the inside to the outside. The internal device analyzes the exhaust gas introduced from the purification apparatus main body. The floor material on the lower side in the up-down direction of the pair of floor materials has a lower side opening portion penetrating the floor material in the up-down direction at a position below the gas sensor unit. The exhaust gas purifying apparatus further includes an air supply unit. The air supply unit sucks air from the suction port into the unit housing to cool the internal equipment, and sends out air discharged from the discharge port to a position above the flooring material on the upper side in the vertical direction of the pair of flooring materials.

The ship according to the present invention includes the exhaust gas purifying apparatus described above.

Effects of the invention

According to the exhaust gas purifying apparatus and the ship of the present invention, the internal equipment of the gas sensor unit can be suppressed from being exposed to a high-temperature environment, and the analysis of the exhaust gas can be performed without hindrance.

Drawings

Fig. 1 is a side view showing a schematic configuration of a ship according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of a ship provided with an exhaust gas purifying device according to an embodiment of the present invention, as viewed from the bow-to-stern direction.

Fig. 3 is a cross-sectional view showing the structure of an exhaust gas purifying apparatus according to a first embodiment of the present invention.

Fig. 4 is a cross-sectional view showing the structure of an exhaust gas purifying apparatus according to a second embodiment of the present invention.

Detailed Description

An exhaust gas purifying apparatus and a ship according to an embodiment of the present invention will be described below with reference to fig. 1 to 4.

< first embodiment >, first embodiment

(Structure of Ship)

As shown in fig. 1, the ship 1 according to this embodiment includes at least a hull 2, an internal combustion engine 8, and an exhaust gas purifying device 20. The type of the ship 1 is not particularly limited. The types of the ship 1 can be exemplified by, for example, a liquefied gas Carrier, a ferry, a RORO ship (Roll-on/Roll-off ship), a PCTC (Pure Car & Truck Carrier: automobile & Truck Carrier), a passenger ship, and the like.

The hull 2 has a pair of sides 3A, 3B forming its hull, a bottom 4 and an upper deck 5. The sides 3A and 3B include a pair of side outer plates that form a port side and a starboard side, respectively. The bottom 4 includes a bottom outer plate connecting the side plates 3A and 3B. The hull 2 has a U-shape in cross section orthogonal to the fore-and-aft direction Da by the pair of side plates 3A, 3B and the bottom 4.

The hull 2 further comprises an upper deck 5 and a bottom deck 6 between the pair of sides 3A, 3B. The upper deck 5 is an all-pass deck exposed to the outside. The bottom deck 6 is provided in the hull 2 and forms a double bottom together with the bottom outer plate. In the hull 2, an upper deck 5 on the stern 2b side is formed with an upper structure 7 having a living area.

An internal combustion engine 8 is provided within the hull 2. The internal combustion engine 8 may be a main engine that generates a driving force for propelling the hull 2, an internal combustion engine that drives a generator that supplies electric power into the hull 2, or the like. The internal combustion engine 8 is driven by burning fuel. The internal combustion engine 8 discharges exhaust gas G generated by burning fuel. The fuel of the internal combustion engine 8 used in this embodiment is a fuel that emits an exhaust gas G containing a large amount of sulfur components, and examples thereof include heavy oils such as heavy oil a and heavy oil C.

The vessel 1 includes a chimney 9 at an upper portion of the stern 2b of the hull 2. A chimney 9 is provided on the upper deck 5. The chimney 9 is cylindrical and extends in the vertical direction Dv, and extends so as to protrude upward from the upper deck 5. As shown in fig. 2, the chimney 9 includes a flue 12. The flue 12 is provided inside the chimney 9. The flue 12 forms a flow path of the exhaust gas G generated by burning fuel in the internal combustion engine 8. An exhaust gas conduit 13 for discharging exhaust gas G from the internal combustion engine 8 is connected to the lower end of the flue 12. The upper end of the flue 12 is opened upward in the vertical direction Dv at the upper portion of the chimney 9.

(Structure of exhaust gas purifying device)

As shown in fig. 2, the exhaust gas purifying device 20 is provided at the stern 2b of the hull 2 and is provided adjacent to the chimney 9. The exhaust gas purifying device 20 purifies the exhaust gas G discharged from the internal combustion engine 8 of the ship 1. The exhaust gas purifying device 20 reduces sulfur oxides and nitrogen oxides contained in the exhaust gas G that is guided to the flue 12 via the exhaust gas duct 13. As shown in fig. 2 and 3, the exhaust gas purifying device 20 includes an exhaust gas introduction unit 14, a purifying device body 21, a housing 25, a gas sensor unit 40, and a gas supply unit 50A.

As shown in fig. 2, the exhaust gas introduction portion 14 forms a pipe through which the exhaust gas G is sucked. One end of the exhaust gas introduction portion 14 is connected to the flue 12. That is, the exhaust gas G is sucked from the flue 12 of the chimney 9 in the exhaust gas introduction portion 14. The other end of the exhaust gas introduction portion 14 is connected to the purification apparatus main body 21. The exhaust gas introduction unit 14 illustrated in this embodiment feeds the exhaust gas G to the lower portion of the purification apparatus main body 21. The exhaust gas G fed to the purification apparatus main body 21 is purified, for example, while flowing from below to above in the purification apparatus main body 21, and is discharged from the upper part of the purification apparatus main body 21 through the chimney 9.

(Structure of purification apparatus body)

The purification apparatus main body 21 has a cylindrical shape extending in the up-down direction Dv. The purification apparatus main body 21 has a purification section 16. The purifying portion 16 purifies the exhaust gas G discharged from the internal combustion engine 8. The purifying unit 16 is disposed inside the purifying apparatus main body 21. The purifying section 16 illustrated in this embodiment has a water supply pipe 16a and a plurality of nozzles 16b. The water supply pipe 16a extends in a direction intersecting the vertical direction Dv in the purification apparatus main body 21. Water (sea water) sucked from the lower portion of the hull 2 by a pump (not shown) or the like is sent to the water supply pipe 16a. A plurality of nozzles 16b are formed in the water supply pipe 16a. The plurality of nozzles 16b are arranged at intervals in the extending direction of the water supply pipe 16a. Each nozzle 16b sprays water supplied through the water supply pipe 16a into the purification apparatus main body 21. The water injected from the plurality of nozzles 16b is brought into contact with sulfur oxides and nitrogen oxides contained in the exhaust gas G passing through the purification apparatus main body 21, whereby the sulfur oxides and the nitrogen oxides are recovered. The water sprayed from the plurality of nozzles 16b is recovered by a water recovery unit (not shown) provided below the plurality of nozzles 16b.

The housing 25 is provided to cover the exhaust gas introduction portion 14 and the purification apparatus main body 21. A part of the housing 25 in this embodiment is joined to the chimney 9 by welding or the like, and is integrated. The housing 25 is not limited to being integrated with the chimney 9.

The housing 25 has a plurality of flooring materials 22. The plurality of floor materials 22 are disposed around the purifier body 21 in the housing 25. The plurality of flooring materials 22 are disposed apart in the up-down direction Dv. The space in the housing 25 is divided by the plurality of floor materials 22 in the up-down direction Dv, and a plurality of stages F are formed in the up-down direction Dv. Each of the layers F is formed between a pair of flooring materials 22 adjacent to each other in the up-down direction Dv.

(Structure of gas sensor unit)

The gas sensor unit 40 is disposed at one level Fa among the plurality of levels F. As shown in fig. 3, the gas sensor unit 40 is disposed between the floor material 22U on the upper side and the floor material 22B on the lower side (in other words, between the pair of floor materials 22U, 22B) in the vertical direction Dv in the level Fa. The gas sensor unit 40 is provided at the level Fa so as to be spaced upward from the floor material 22B on the lower side in the up-down direction Dv. The gas sensor unit 40 is fixed to, for example, a wall of the housing 25 provided at the level Fa, a support (not shown) provided on the floor material 22B, or the like. The gas sensor unit 40 has an internal device 41 and a unit housing 42.

The internal device 41 is provided in the unit frame 42. The internal device 41 analyzes the concentration of sulfur oxides, nitrogen oxides, or the like detected by the sensor. The internal device 41 includes a sensor that detects sulfur oxides, nitrogen oxides, and the like contained in the exhaust gas G, a control substrate that analyzes the concentration of the sulfur oxides, nitrogen oxides, and the like detected by the sensor, and the like. In the internal device 41, a gas collection pipe 45 is connected to a gas return pipe 46. The gas collection pipe 45 collects the exhaust gas G on the downstream side in the gas flow direction of the purifying section 16 in the purifying apparatus main body 21, and sends the exhaust gas G to the internal device 41. The gas return pipe 46 returns the exhaust gas G analyzed by the internal device 41 into the purification apparatus main body 21.

The unit frame 42 has a hollow box shape, and accommodates the internal device 41 therein. The unit frame 42 can also house other devices for actuating the internal device 41. The unit housing 42 in this embodiment includes an openable and closable door 42d. The unit housing 42 is opened by the door 42d to allow access to the internal equipment 41 therein for maintenance or the like. Further, a suction port 43 and a discharge port 44 are formed in the unit frame 42.

The suction port 43 and the discharge port 44 of the unit housing 42 illustrated in this embodiment are formed in the door 42d of the unit housing 42.

The suction port 43 is formed at the lower portion of the unit housing 42. The suction port 43 communicates the inner space of the unit housing 42 with the outer space of the unit housing 42. The suction port 43 can suck air from the outside space to the inside space of the unit housing 42. The suction port 43 of this embodiment is provided with a supply fan 48. Air is supplied from the outside to the inside of the unit housing 42 by the air supply fan 48.

A discharge port 44 is formed at an upper portion of the unit frame 42. The discharge port 44 communicates the inner space of the unit frame 42 with the outer space of the unit frame 42. The discharge port 44 can discharge air from the inside of the unit housing 42 to the outside. In addition, a fan or the like for exhaust gas is not provided in the exhaust port 44 of this embodiment.

(Structure of lower opening)

A lower opening 23 is formed in the lower flooring 22B of the pair of flooring 22U, 22B located above and below the level Fa where the gas sensor unit 40 is provided. More specifically, the lower opening 23 is formed in the floor material 22B of the portion below the gas sensor unit 40. The lower opening 23 penetrates the flooring material 22B in the up-down direction Dv. The opening area of the lower opening 23 illustrated in this embodiment is set to be larger than the flat cross-sectional area (in other words, the horizontal projection area) of the unit frame 42 of the gas sensor unit 40.

The lower opening 23 in this embodiment is formed to include a position below (vertically below) the suction port 43 formed in the unit housing 42 in the vertical direction Dv. The lower opening 23 in this embodiment is provided with a perforated plate 23p such as a punched metal plate having a plurality of openings (holes). The lower opening 23 communicates the level Fa where the gas sensor unit 40 is provided with the lower floor material 22B with the lower level Fc therebetween. In addition, the porous plate 23p may be omitted.

(Structure of air supply portion)

The air supply portion 50A supplies air discharged from the discharge port 44 in the unit housing 42 of the gas sensor unit 40 to a position above the floor material 22U on the upper side of the level Fa where the gas sensor unit 40 is provided. The air supply portion 50A in this embodiment has an upper opening 51. The upper opening 51 is formed in the upper floor material 22U. The upper opening 51 penetrates the upper floor material 22U in the up-down direction Dv. The upper opening 51 is disposed at a position above the gas sensor unit 40 (for example, vertically above the gas sensor unit). The air supply portion 50A of this embodiment includes a blower 52 such as a fan at the upper opening 51. The blower 52 sends air from the level Fa provided with the gas sensor unit 40 toward the level Fb above the upper floor material 22U.

In this configuration, when the air supply fan 48 is activated, air outside the unit housing 42 is sucked into the air sensor unit 40 through the suction port 43. Thereby, the internal device 41 in the unit housing 42 is cooled. The air cooled down the internal device 41 is discharged from the discharge port 44 to the outside of the unit frame 42.

When the blower 52 serving as the air supply portion 50A is activated, air at the level Fa below the upper opening 51 is sent to the level Fb above. Thereby, the air discharged from the discharge port 44 to the outside of the unit frame 42 is sent out to above the floor material 22U on the upper side of the level Fa where the gas sensor unit 40 is arranged.

That is, the air discharged from the discharge port 44 is sent out to above the upper floor material 22U by being sucked into the unit housing 42 from the suction port 43 to cool the internal device 41. Thereby, the air whose temperature has risen by cooling the internal devices 41 in the unit frame 42 is discharged above the level Fa where the gas sensor unit 40 is provided.

Then, the air is sent out to a position above the upper floor material 22U by the blower 52 of the air sending unit 50A, whereby the atmospheric pressure of the level Fa provided with the gas sensor unit 40 is reduced. By this pressure decrease, air at the level Fc below the lower floor material 22B is sucked in through the lower opening 23. Thereby, in the stage Fa provided with the gas sensor unit 40, unheated air of the lower stage Fc is sucked.

(effects of action)

In the first embodiment, the air having the temperature increased by cooling the internal devices 41 in the unit housing 42 is discharged to a position above the level Fa where the gas sensor unit 40 is disposed through the air supply portion 50A. Therefore, the rise in temperature of the level Fa provided with the gas sensor unit 40 due to the air discharged from the inside of the unit frame 42 is suppressed.

Then, air of the level Fc below the lower floor 22B is sucked through the lower opening 23 formed in the lower floor 22B of the level Fa where the gas sensor unit 40 is provided. As a result, unheated air of the lower level Fc can be sucked into the level Fa where the gas sensor unit 40 is provided. Further, the lower opening 23 is formed at a position below (vertically below) the gas sensor unit 40. This makes it possible to suck air sucked from the lower stage Fc into the unit frame 42 through the suction port 43 before diffusing in the stage Fa where the gas sensor unit 40 is disposed. Therefore, the air sucked from the lower layer Fc can be efficiently sucked into the unit frame 42.

As a result, the internal device 41 of the gas sensor unit 40 is prevented from being exposed to a high-temperature environment, and the analysis of the exhaust gas G can be performed without being hindered. That is, it is possible to prevent the occurrence of false actuation or malfunction of the gas sensor unit 40 and to continue the actuation state of the exhaust gas purification device 20.

The air discharged from the discharge port 44 to the outside of the unit housing 42 is sent out to a position above the floor material 22U on the upper side of the level Fa where the gas sensor unit 40 is provided through the upper opening 51. This enables air whose temperature has risen by cooling the internal devices 41 in the unit housing 42 to be smoothly discharged to the level Fb above the level Fa where the gas sensor unit 40 is provided. Therefore, the rise in temperature of the level Fa provided with the gas sensor unit 40 due to the air discharged from the inside of the unit frame 42 is suppressed.

The air discharged from the discharge port 44 to the outside of the unit housing 42 can be positively sent out to the upper side above the upper floor material 22U through the upper opening 51 by the blower 52. Therefore, the rise in temperature of the stage Fa provided with the gas sensor unit 40 due to the air discharged from the inside of the unit frame 42 is further suppressed.

The air supply fan 48 can actively suck the air flowing into the stage Fa through the lower opening 23 into the unit housing 42. This can improve the cooling efficiency of the internal device 41 in the unit housing 42.

< second embodiment >

Next, an exhaust gas purifying apparatus and a ship according to a second embodiment of the present invention will be described. In this second embodiment, only the configuration of the air supply portion is different from that of the first embodiment, and therefore, the same reference numerals are given to the same portions as those of the first embodiment, and overlapping description is omitted.

As shown in fig. 4, the exhaust gas purifying device 20 provided in the ship 1 includes an air supply portion 50B and a duct device 80. The air supply portion 50B supplies air discharged from the discharge port 44 in the unit housing 42 of the gas sensor unit 40 to a position above the floor material 22U on the upper side of the level Fa where the gas sensor unit 40 is provided. The air supply portion 50B in this embodiment includes an exhaust gas duct member 55.

The exhaust gas duct member 55 includes a duct body 56 and a magnet portion 57. The catheter main body 56 is made of a corrugated tube material, and has flexibility. The duct body 56 extends in the up-down direction Dv so as to traverse the level Fb and the level Fa. The magnet portion 57 is provided at the lower end of the catheter main body 56. The magnet portion 57 is attracted to the door 42d of the unit housing 42 made of a magnetic material such as an iron plate around the discharge port 44 by the magnetic force. Thereby, the lower end of the duct body 56 of the exhaust duct member 55 can be connected to the discharge port 44.

The duct device 80 is provided at a level Fb above the upper floor material 22U. For ventilation within the housing 25, the duct apparatus 80 discharges air within the housing 25 outside the housing 25, i.e. outboard. The duct device 80 includes a tubular duct 81 provided at the level Fb, a fan (not shown) that generates a flow in a predetermined exhaust direction in the duct 81, and the like. The conduit apparatus 80 has an overboard-opening conduit discharge 82.

The duct body 56 of the exhaust duct member 55 described above is connected to the duct 81 of the duct device 80 at the level Fb.

The catheter device 80 of this embodiment includes a suction catheter 83 that opens above (e.g., directly above) the upper opening 51 and communicates with the catheter 81.

In this configuration, when the air supply fan 48 is activated, air outside the unit housing 42 is sucked into the air sensor unit 40 through the suction port 43. Thereby, the internal device 41 in the unit housing 42 is cooled. The air cooled down the internal device 41 is discharged from the discharge port 44 to the outside of the unit frame 42. The attractive force caused by the flow in the conduit 81 of the conduit means 80 acts on the exhaust conduit member 55. By this attractive force, the air in the unit frame 42 is positively discharged from the discharge port 44 and sent into the duct apparatus 80 through the exhaust duct member 55. Thereby, the air discharged from the discharge port 44 is discharged to the outside of the ship 1.

(effects of action)

In the second embodiment, the air having the temperature increased by cooling the internal devices 41 in the unit housing 42 is discharged to a position above the level Fa where the gas sensor unit 40 is disposed through the air supply portion 50B. Therefore, the rise in temperature of the level Fa provided with the gas sensor unit 40 due to the air discharged from the inside of the unit frame 42 is suppressed.

Then, air of the level Fc below the lower floor 22B is sucked through the lower opening 23 formed in the lower floor 22B of the level Fa where the gas sensor unit 40 is provided. As a result, unheated air of the lower level Fc can be sucked into the level Fa where the gas sensor unit 40 is provided.

Therefore, the exposure of the internal device 41 of the gas sensor unit 40 to the high-temperature environment can be suppressed, so that the analysis of the exhaust gas G can be performed unhindered. That is, it is possible to prevent the occurrence of false actuation or malfunction of the gas sensor unit 40 and to continue the actuation state of the exhaust gas purification device 20.

Further, since the lower end of the exhaust duct member 55 is connected to the discharge port 44, the air discharged from the discharge port 44 is sent out to above the floor material 22U on the upper side of the level Fa where the gas sensor unit 40 is provided through the exhaust duct member 55. This can prevent the air having a temperature rise by cooling the internal devices 41 in the unit frames 42 from being discharged from the discharge ports 44 to the level Fa where the unit frames 42 are provided. Therefore, the rise in temperature of the stage Fa provided with the gas sensor unit 40 due to the air discharged from the inside of the unit frame 42 is further suppressed.

Further, since the magnet portion 57 is provided at the lower end of the duct body 56, the duct body 56 can be attached to and detached from the unit housing 42 around the discharge port 44. Since the duct body 56 has flexibility, the duct body 56 can be separated from the unit housing 42 in a state where the magnet portion 57 at the lower end of the duct body 56 is detached from the unit housing 42. In this way, when maintenance or the like is performed in the unit housing 42, the door 42d of the unit housing 42 can be easily opened and closed, thereby improving maintainability.

The upper end of the exhaust gas duct member 55 is connected to a duct device 80 provided at a level Fb above the floor material 22U on the upper side. Thereby, the air discharged from the discharge port 44 can be sent to the duct apparatus 80 through the exhaust duct member 55 and discharged outside the ship 1. Therefore, it is possible to suppress the temperature rise of the layer Fb above the upper floor material 22U due to the air whose temperature rises by cooling the internal devices 41 of the gas sensor unit 40.

(other embodiments)

The embodiments of the present invention have been described in detail above with reference to the drawings, but the specific configuration is not limited to the embodiments, and design changes and the like without departing from the scope of the gist of the present invention are also included.

In the above embodiments, the ship 1 provided with the exhaust gas purifying device 20 has been described as an example, but the application of the exhaust gas purifying device 20 is not limited.

< additionally remembered >

The exhaust gas purifying device 20 and the vessel 1 described in the embodiments are grasped as follows, for example.

(1) The exhaust gas purifying apparatus 20 according to claim 1 is an exhaust gas purifying apparatus 20 for purifying exhaust gas discharged from an internal combustion engine 8 of a ship 1, comprising: a purification device main body 21 provided in a housing 25 provided in the ship 1, and having a purification unit 16 that purifies exhaust gas G discharged from the internal combustion engine 8; a housing having a plurality of flooring materials 22 provided separately in the up-down direction Dv so as to form a plurality of levels F around the purification apparatus main body 21, at least covering the purification apparatus main body; and a gas sensor unit 40 provided between a pair of the floor materials 22 adjacent to each other in the up-down direction Dv, the gas sensor unit 40 including: an internal device 41 for analyzing the exhaust gas introduced from the purification apparatus main body 21; and a unit housing 42 that accommodates the internal device 41, and has a suction port 43 that sucks air from outside to inside and a discharge port 44 that discharges air from inside to outside, wherein the floor material 22B on the lower side in the up-down direction Dv of the pair of floor materials 22 has a lower opening 23 that penetrates the floor material 22B in the up-down direction Dv at a position below the gas sensor unit 40, and wherein the exhaust gas purifying apparatus further includes air supply portions 50A and 50B, wherein the air supply portions 50A and 50B suck air from the suction port 43 into the unit housing 42 to cool the internal device 41, and send the air discharged from the discharge port 44 to the upper side of the floor material 22U on the upper side in the up-down direction Dv of the pair of floor materials 22.

In the exhaust gas purifying device 20, air outside the unit housing 42 is sucked from the suction port 43 of the gas sensor unit 40 into the interior. Thereby, the internal device 41 in the unit housing 42 is cooled. The air cooled down the internal device 41 is discharged from the discharge port 44 to the outside of the unit frame 42. The air discharged to the outside of the unit frame 42 is sent out to above the flooring material 22U on the upper side of the level Fa where the gas sensor unit 40 is provided by the air sending portions 50A, 50B. That is, the air whose temperature has risen by cooling the internal devices 41 in the unit frame 42 is discharged to above the level Fa where the gas sensor unit 40 is provided. Therefore, the rise in temperature of the level Fa provided with the gas sensor unit 40 due to the air discharged from the inside of the unit frame 42 is suppressed.

Then, the air in the unit frame 42 is sent out to a position above the upper floor material 22U by the air sending portions 50A and 50B, whereby the atmospheric pressure of the level Fa where the gas sensor unit 40 is provided is reduced. By this pressure decrease, air of the level Fc below the lower floor 22B is sucked through the lower opening 23 formed in the lower floor 22B of the level Fa where the gas sensor unit 40 is provided. As a result, unheated air of the lower level Fc can be sucked into the level Fa where the gas sensor unit 40 is provided. Further, the lower opening 23 is formed at a position below the gas sensor unit 40. This makes it possible to suck air sucked from the lower stage Fc from the suction port 43 into the unit housing 42 before diffusing in the stage Fa where the gas sensor unit 40 is provided. Therefore, the air sucked from the lower layer Fc can be efficiently sucked into the unit frame 42.

(2) The exhaust gas purifying device 20 according to claim 2 is the exhaust gas purifying device 20 of (1), wherein the air supply portion 50A is formed in the floor material 22U on the upper side in the up-down direction Dv of the pair of floor materials 22, and an upper opening 51 penetrating the floor material 22 in the up-down direction Dv is provided at a position above the gas sensor unit 40.

Thereby, the air discharged from the discharge port 44 to the outside of the unit frame 42 is sent out to above the floor material 22U on the upper side of the level Fa where the gas sensor unit 40 is provided through the upper side opening 51. This enables air having a temperature rise by cooling the internal devices 41 in the unit housing 42 to be smoothly discharged above the level Fa where the gas sensor unit 40 is provided. Therefore, the rise in temperature of the level Fa provided with the gas sensor unit 40 due to the air discharged from the inside of the unit frame 42 is suppressed.

(3) The exhaust gas purifying device 20 according to the 3 rd aspect is the exhaust gas purifying device 20 according to (2), further comprising: the blower 52 is provided in the upper opening 51, and conveys air from below the upper floor material 22U to above.

Accordingly, the air discharged from the discharge port 44 to the outside of the unit housing 42 can be positively sent out to above the upper flooring material 22U through the upper opening 51 by the blower 52. Therefore, the rise in temperature of the stage Fa provided with the gas sensor unit 40 due to the air discharged from the inside of the unit frame 42 is more effectively suppressed.

(4) The exhaust gas purifying device 20 according to claim 4 is the exhaust gas purifying device 20 according to any one of (1) to (3), wherein the air supply portion 50B further includes a tubular exhaust gas duct member 55, and the tubular exhaust gas duct member 55 is connected to the discharge port 44, penetrates the upper floor material 22U, and extends above the upper floor material 22U.

Thereby, the air discharged from the discharge port 44 is sent out to above the floor material 22U on the upper side of the level Fa where the gas sensor unit 40 is provided through the exhaust gas duct member 55. Therefore, the air whose temperature rises by cooling the internal devices 41 in the unit frames 42 can be suppressed from being discharged from the discharge ports 44 to the level Fa where the unit frames 42 are provided. Therefore, the rise in temperature of the stage Fa provided with the gas sensor unit 40 due to the air discharged from the inside of the unit frame 42 is further suppressed.

(5) The exhaust gas purifying device 20 according to claim 5 is the exhaust gas purifying device 20 according to (4), wherein the unit housing 42 is formed of a magnetic material, and the exhaust gas duct member 55 includes: a catheter main body 56 having flexibility; and a magnet 57 provided at a lower end of the duct body 56 and attached to the unit housing 42 around the discharge port 44.

According to this structure, the magnet portion 57 is provided at the lower end of the catheter main body 56. Thereby, the duct body 56 can be attached to and detached from the unit frame 42 around the discharge port 44. Since the duct body 56 has flexibility, the duct body 56 can be separated from the unit housing 42 in a state where the magnet portion 57 at the lower end of the duct body 56 is detached from the unit housing 42. This makes it possible to easily open and close the unit housing 42 when maintenance or the like is performed in the unit housing 42, thereby improving maintainability.

(6) The exhaust gas purifying device 20 according to claim 6 is the exhaust gas purifying device 20 according to (4) or (5), wherein the upper end of the exhaust gas duct member 55 is connected to a duct device 80, and the duct device 80 is provided at the level Fb above the floor material 22U on the upper side, and discharges the air in the ship 1 to the outside of the ship.

Thereby, the air discharged from the discharge port 44 can be sent to the duct apparatus 80 through the exhaust duct member 55. Thereby, the air discharged from the discharge port 44 can be discharged to the outside of the ship 1. Therefore, it is possible to suppress the temperature rise of the floor material 22U above the floor material 22U on the upper side of the floor Fa where the gas sensor unit 40 is provided, due to the air whose temperature rises by cooling the internal devices 41 of the gas sensor unit 40.

(7) The exhaust gas purifying apparatus 20 according to the 7 th aspect is any one of the exhaust gas purifying apparatuses 20 (1) to (6), and further includes: an air supply fan 48 for sucking air from the suction port 43 into the unit housing 42.

Accordingly, the air flowing from the lower stage Fc to the stage Fa provided with the gas sensor unit 40 through the lower opening 23 can be positively sucked into the unit housing 42 by the air supply fan 48. This can improve the cooling efficiency of the internal device 41 in the unit housing 42.

(8) The ship 1 according to claim 8 is provided with the exhaust gas purifying device 20 according to any one of (1) to (7).

This makes it possible to analyze the exhaust gas G without being hindered while suppressing the increase in ventilation equipment and the like. Therefore, the weight and cost of the ship 1 can be suppressed from rising, and the maintenance frequency can be reduced, thereby reducing the burden on the operator.

Industrial applicability

Symbol description

1-ship, 2-hull, 2B-stern, 3A, 3B-side, 4-bilge, 5-upper deck, 6-bottom deck, 7-superstructure, 8-internal combustion engine, 9-chimney, 12-chimney, 13-exhaust duct, 16-purification section, 16 a-water supply pipe, 16B-nozzle, 20-exhaust purification apparatus, 21-purification apparatus main body, 22-flooring, 22B-flooring, 22U-upper flooring, 23-downside opening, 23 p-perforated plate, 25-hull, 40-gas sensor unit, 41-interior equipment, 42-unit frame, 42 d-door leaf, 43-suction inlet, 44-discharge port, 45-gas collection pipe, 46-gas return pipe, 48-supply fan, 50A, 50B-air supply section, 51-upside opening, 52-blower, 55-exhaust duct member, 56-duct main body, 57-magnet section, 80-duct equipment, 81-duct, 82-duct discharge port, 83-duct, dset-exhaust duct, dsv, d-down level, up-down direction of the ship, and 38-G.

Claims

1. An exhaust gas purifying apparatus that purifies exhaust gas discharged from an internal combustion engine of a ship, the exhaust gas purifying apparatus comprising:

a purification apparatus main body having a purification portion that purifies exhaust gas discharged from the internal combustion engine;

a housing having a plurality of flooring materials which are provided so as to be separated in the vertical direction in such a manner that a plurality of levels are formed around the purification apparatus main body, and which covers at least the purification apparatus main body; and

A gas sensor unit provided between a pair of the flooring materials adjacent to each other in the up-down direction,

the gas sensor unit includes:

an internal device that analyzes the exhaust gas introduced from the purification apparatus main body; and

A unit frame body for accommodating the internal device and having a suction port for sucking air from outside to inside and a discharge port for discharging air from inside to outside,

the floor material on the lower side in the up-down direction of the pair of floor materials has a lower side opening portion penetrating the floor material in the up-down direction at a position below the gas sensor unit,

the exhaust gas purifying apparatus further includes an air supply unit that supplies air, which is sucked into the unit housing from the suction port and cools the internal equipment, to the pair of floor materials above the floor materials on the upper side in the vertical direction from the discharge port.

2. The exhaust gas purifying apparatus according to claim 1, wherein,

the air supply portion is formed on the floor material on the upper side in the vertical direction of the pair of floor materials, and has an upper opening portion penetrating the floor material in the vertical direction at a position above the gas sensor unit.

3. The exhaust gas purifying apparatus according to claim 2, further comprising a blower:

and an air supply unit provided in the upper opening and configured to supply air from below the upper flooring material to above.

4. The exhaust gas purifying apparatus according to any one of claims 1 to 3, wherein,

the air supply portion further includes a tubular exhaust gas duct member connected to the discharge port, and extending upward through the upper floor material than the upper floor material.

5. The exhaust gas purifying apparatus according to claim 4, wherein,

the unit frame is formed of a magnetic material,

the exhaust gas duct member is provided with:

a catheter body having flexibility; and

And a magnet part which is arranged at the lower end of the duct main body and can be adsorbed on the unit frame body around the discharge port.

6. The exhaust gas purifying apparatus according to claim 4 or 5, wherein,

the exhaust gas duct member has an upper end connected to a duct device provided at the level above the floor material on the upper side, and configured to discharge air in the ship to the outside of the ship.

7. The exhaust gas purification device according to any one of claims 1 to 6, further comprising:

and an air supply fan for supplying air from the suction inlet to the inside of the unit frame.

8. A ship provided with the exhaust gas purifying apparatus according to any one of claims 1 to 7.