JP2003137185A - Smoke damage prevention device of chimney for ship - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a smoke damage to the neighborhood at the time of harbor anchorage of a ship without forming a complex introduction route on an exhaust pipe. SOLUTION: A plurality of exhaust pipes 4 of which an upper end is made to an exhaust gas blowing port 4a are arranged, in a right/left direction, at a rear side position of a flame tube 5 in an outer cylinder 3 of the chimney of the ship chimney 1 projected on a ship body structure. A plurality of air feed pipes 8 connected to an air source are arranged at a rear side position rather than the exhaust gas pipes 4 in a right/left direction. Upper ends of the respective air feed pipes 8 are opened to a lower position than the upper ends of the exhaust gas pipes 4 and an air blow nozzle 11 is provided at the opening. An air curtain 12 is formed at a rear side of the exhaust gas blowing port 4a of the exhaust gas pipes 4 by the air upwardly blown out from the respective air blowing nozzles 11 through the respective air feed pipes 8. A rearward flow of the exhaust gas 7 discharged from the exhaust gas pipe 4 is inhibited by the air curtain 12 to prevent the smoke damage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ship chimney smoke damage prevention device used for preventing smoke damage caused by exhaust gas when a ship is anchored in a harbor.

[0002]

2. Description of the Related Art Generally, a cargo ship carries out cargo handling work in a state of being anchored at a harbor. At this time, exhaust gas emitted from a chimney may flow onto a harbor worker and its associated facilities. Yes, it hinders cargo handling work. In particular, in the case of container ships, when carrying in and out work to and from the stern side cargo hold behind the chimney using a port cargo handling crane, exhaust gas flows onto the periphery of the crane, resulting in poor visibility for crane operators. And the work environment is deteriorated, resulting in a decrease in the efficiency of cargo handling work.

Therefore, conventionally, as shown in an example in FIG. 4, a main diesel engine, a generator diesel engine, and an auxiliary boiler are provided in a chimney outer cylinder 3 of a marine chimney 1 projecting on a hull upper structure 2. , A plurality of small-diameter (for example, three) exhaust gas pipes 4 for incinerators and the like, and a large-diameter smoke pipe 5 for the main boiler penetrate the outer cylinder top plate 6 and project upward. In the configuration that is arranged as described above, as a smoke pollution countermeasure, the exhaust pipe 4 that is originally located on the rear side of the smoke pipe 5 and discharges the exhaust gas 7 even when the port is moored is used as the smoke pipe 5 that does not emit the exhaust gas when the port is moored. And the exhaust gas outlet 4a of the exhaust gas pipe 4 is directed upward so that the position of the exhaust gas outlet 4a is as far as possible from the stern side cargo hold. There is.

[0004]

However, in the above measures against smoke damage, in the inside of the narrow chimney outer cylinder 3, the exhaust gas pipe 4 is bent to change the guide route to the bow side, and complicated pipe fittings and pipes are installed. Despite being forced into a shape,
Since the exhaust gas 7 discharged from the exhaust gas pipe 4 cannot be sufficiently blown up, the actual situation is that the desired effect is not obtained. Furthermore, as mentioned above,
Since the exhaust gas outlet 4a of the exhaust gas pipe 4 is directed upward, it is necessary to separately take measures to prevent rainwater from entering the exhaust gas pipe.

Therefore, the present invention makes it possible to prevent smoke damage to the vicinity of a harbor when a ship is anchored in a port without forming a complicated guide route in the exhaust gas pipe, and further to prevent rainwater from flowing into the exhaust gas pipe. It aims to eliminate the need for additional intrusion prevention measures.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a smoke pipe and an exhaust gas pipe arranged in a chimney outer cylinder of a marine chimney so that the exhaust gas pipe is on the rear side of the smoke pipe. The air is blown upward in a curtain shape above the position between the rear side of the exhaust gas pipe and the rear side wall of the chimney outer cylinder, and the upper end of the exhaust gas pipe is blown by the air blown upward. Since it is configured to form the air curtain on the rear side, it is possible to form the air curtain on the rear side of the upper end of the exhaust gas pipe, and when the ship is anchored at the port,
The exhaust gas discharged from the upper end of the exhaust gas pipe is prevented from flowing backward by the air curtain, and the exhaust gas is carried upward along the air curtain.
Therefore, it is possible to prevent the exhaust gas from flowing into the facilities and residential areas near the harbor and prevent the smoke damage due to the exhaust gas.

As a means for forming an air curtain on the rear side of the upper end of the exhaust gas pipe, a plurality of air supply pipes are arranged on the rear side of the exhaust gas pipe, and the air supply pipes are arranged in the left-right direction. The upper end of each air supply pipe is opened at a position lower than the upper end of the exhaust gas pipe, and further, an air blowing nozzle is provided at the upper end opening of each air supply pipe, and the air is blown upward from the air supply source through the air blowing nozzle. The blown air may be used to form an air curtain on the rear side of the upper end of the exhaust gas pipe, or on the rear side of the exhaust gas pipe, a diffuser duct that expands toward the upper end is provided, and the upper end of the diffuser duct is As an air outlet, it is opened at a position lower than the upper end of the exhaust gas pipe, and is further blown upward from the air supply source through the air outlet of the diffuser duct. An air curtain is formed on the rear side of the upper end of the exhaust gas pipe, or a corrugated plate is arranged on the rear side of the exhaust gas pipe so that irregularities are aligned in the left-right direction, and the corrugated plate and the chimney outer cylinder are arranged. A plurality of air passages are formed between the inner surface of the rear side wall, the upper end of each air passage is lower than the upper end of the exhaust gas pipe, the upper end of each air passage is an air outlet, and A plurality of air supply pipes, by having a structure to form an air curtain on the rear side of the upper end of the exhaust gas pipe by the air blown upward from the supply source through the air outlets of the respective air passages, By the diffuser duct and the air curtain formed through the plurality of air flow paths, it is possible to prevent smoke damage due to the exhaust gas discharged from the upper end portion of the exhaust gas pipe as described above,
Furthermore, it is not necessary to form a complicated exhaust gas pipe piping guide route inside the narrow chimney outer cylinder, and the optimum exhaust gas pipe and pipe route can be achieved.

Further, as the air supply source, a compressed air system for miscellaneous purposes equipped in the hull or a mobile air blower for supplying fresh air in the hull is used, whereby a dedicated compressed air supply source and a dedicated air supply There is no need to prepare a ventilator.

Furthermore, by making the exhaust gas blow off from the upper end of the exhaust gas pipe in a lateral direction, it is possible to prevent rainwater from entering the exhaust gas pipe.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

1 (a) and 1 (b) show an embodiment of the present invention, and like the one shown in FIG. 4, outside the chimney of the marine chimney 1 projecting on the hull upper structure 2. In the configuration in which a plurality of (three in the figure) exhaust gas pipes 4 and one smoke pipe 5 are arranged in the cylinder 3 so as to respectively penetrate the outer cylinder top plate 6 and project upward, Pipe 4 and smoke pipe 5,
The exhaust gas pipes 4 are arranged so as to be located behind the smoke pipes 5, the exhaust gas pipes 4 and the smoke pipes 5 are arranged so as to extend upward in parallel, and the upper ends of the exhaust gas pipes 4 are rearward. The exhaust gas outlet 4a is opened rearward, and the air is blown upward from a position between the position where the exhaust gas pipes 4 are lined up and the inner surface of the rear side wall 3a of the chimney outer cylinder 3 to blow out the exhaust gas. The air curtain 12 is formed on the rear side of the gas outlet 4a. As a means therefor, a plurality (seven in the figure) of air supply pipes 8 connected to an air supply source are provided between the exhaust gas pipes 4 and the rear side wall 3a of the chimney outer cylinder 3.
Are installed so as to be lined up in a row in the left-right direction with a required space therebetween, and an opening / closing valve 9 as a compressed air supply source valve is provided at a required position of each of the air supply pipes 8 located in the chimney outer cylinder 3. Pressure reducing valve 1
0 is attached in order from the upstream side, and the upper end of each air supply pipe 8 is projected above the outer cylinder top plate 6 to be lower than the exhaust gas outlet 4a at the upper end of each exhaust gas pipe 4. Further, each of the air supply pipes 8 is provided with an air blowing nozzle 11 at an upper end opening thereof, and each air supply pipe 8 is passed through from the air supply source to form a curtain shape upward from each air blowing nozzle 11. The air curtain 12 is formed behind the exhaust gas outlet 4a of the exhaust gas pipe 4 by blowing out compressed air.

As the air supply source of each of the air supply pipes 8, a compressed air system for miscellaneous purposes of about 10 bar, which is provided as a drive source of a tool used for repairing rust in a ship, can be used. In this case, a branch pipe that is branched from the compressed air system is used as the air supply pipe 8
As a result, it is guided into the chimney outer cylinder 3. As the opening / closing valve 9 provided in the middle of the air supply pipe 8, a manually operated manual valve, an electromagnetically driven electromagnetic valve, an air cylinder driven air piston valve, or the like is adopted.

When a ship such as a cargo ship is anchored in a harbor for cargo handling work, the opening / closing valve 9 of each air supply pipe 8 is opened to allow compressed air from an air supply source to flow to the air supply pipe 8.
Further, after the pressure is reduced to an appropriate pressure by the pressure reducing valve 10, compressed air is blown upward from the air blowing nozzle 11 at the upper end of the air supply pipe 8 to form the air curtain 12. At this time, since the air curtain 12 is formed in the rear region of the exhaust gas outlet 4a of the exhaust gas pipe 4, the exhaust gas 7 discharged from the exhaust gas outlet 4a of the exhaust gas pipe 4a is prevented from flowing backward. At the same time, the exhaust gas 7 can be placed on the air curtain 12 and blown up to a high level, and smoke damage to the cargo handling facility of the port, the cargo worker, and the living area near the port can be prevented.

In the above, since the air curtain 12 is formed in the rear region of the exhaust gas outlet 4a of the exhaust gas pipe 4, the complicated exhaust gas pipe 4 is provided inside the narrow chimney outer cylinder 3 to prevent smoke damage. Therefore, the exhaust gas pipe 4 can be equipped with the optimal arrangement and piping route. Further, since the exhaust gas outlet 4a of the exhaust gas pipe 4 is opened rearward, there is no need to separately take measures against rainwater intrusion, which is advantageous over the conventional method shown in FIG. Further, as the air supply source for blowing out the compressed air from the air blowing nozzle 11 through the air supply pipe 8, it is necessary to prepare a dedicated compressed air source by using the above-mentioned miscellaneous use compressed air system equipped with the hull. There is no advantage.

Next, FIGS. 2 (a), (b) and (c) show another embodiment of the present invention. In the same structure as that shown in FIG. Instead of forming the air curtain 12 by the compressed air blown out through the supply pipe 8, a duct structure is adopted in which the air curtain 12 is formed by the air supplied from the air supply source. That is, the ventilation duct 13 communicating with the air supply source is guided to a position behind the exhaust gas pipe 4 in the upper hull 2 of the hull, and the ventilation duct 13
At the upper end of the diffuser duct 14, which is designed to expand in the left-right direction, is arranged so as to stand up at the rear side position of the exhaust gas pipe 4 in the chimney outer cylinder 3, and the lower end of the diffuser duct 14 and the above-mentioned The upper end of the ventilation duct 13 is communicated. Further, the upper end portion of the diffuser duct 14 penetrates the outer cylinder top plate 6 and the upper end opening portion thereof is an elongated air outlet port 14a extending in the left-right direction, and the air outlet port 14a is lower than the upper end of the exhaust gas pipe 4. Position. Further, a flap valve 15 that can be opened / closed by a manual operation or a remote operation by an electromagnetic drive, a fluid pressure cylinder drive, or the like is provided at a required position in the ventilation duct 13 so that the ventilation duct 1 can be opened from the air supply source.
3, through the diffuser duct 14 air outlet 14a
The air curtain 12 is formed on the rear side of the upper end portion of the exhaust gas pipe 4 by the air flow blown out more.

As the air supply source, a mobile draft fan provided in the ship is used. Generally, ships
In order to supply the fresh air required for consumption of the diesel engine, it is equipped with a plurality of mobile aerators, but the aerator capacity is determined based on the continuous maximum output of the main engine,
When berthing, where smoke pollution at the port can be a problem, only the minimum amount of fresh air required to operate the diesel engine for the generator and the auxiliary boiler is required, so most of the multiple air movers are stopped. . Therefore, the mobile ventilation system that is stopped at the time of mooring at the port is used, and the ventilation duct 13 is branched and guided from the main air supply duct that is supplied from the mobile ventilation system to the engine room section.

In the case of the embodiment shown in FIGS. 2 (a), (b) and (c), the flap valve 15 of the ventilation duct 13 is opened and the air flow supplied from the air supply source is changed when the ship is anchored in the harbor. By guiding the air from the ventilation duct 13 to the diffuser duct 14 and uniformly blowing it upward from the air outlet 14a at the upper end of the diffuser duct 14, the air curtain 1 is provided behind the exhaust gas outlet 4a of the exhaust gas pipe 4.
2 can be formed, the exhaust gas 7 discharged from the exhaust gas outlet 4a of the exhaust gas pipe 4 is removed by the air curtain 12 as in the case of the embodiment of FIGS. It is possible to prevent the backward flow and guide it to a higher position, and to prevent smoke damage near the port. Further, as an air supply source for supplying an air flow to the diffuser duct 14 through the ventilation duct 13,
As described above, the use of the mobile air blower provided in the ship also makes it unnecessary to install a dedicated air blower, which is advantageous.

Next, FIGS. 3A, 3B and 3C show still another embodiment of the present invention.
The diffuser duct 14 in the configuration shown in (c)
Instead of this, a plurality of air flow paths are formed by the corrugated plate 16 to form an air curtain. That is, the corrugated plate 16 is arranged between the rear side of each exhaust gas pipe 4 and the rear side wall 3a of the chimney outer cylinder 3 so that the corrugations are arranged side by side in the left-right direction. A plurality of air passages 17 extending in the vertical direction are formed by the inner surface of the rear side wall 3a, and the upper ends of the air passages 17 protruding above the outer cylinder top plate 6 serve as air outlets 17a.
As a diffuser portion 13a which is opened at a position lower than the exhaust gas outlet 4a of the exhaust gas pipe 4 and which widens the upper end side of the ventilation duct 13 in the hull upper structure 2 in the left-right direction,
An air flow that connects the air passages 17 formed by the corrugated plate 16 and the diffuser portion 13a so as to communicate with each other, and blows air from the air supply source through the ventilation duct 13 and the air passage 17 formed by the corrugated plate 16 from the air outlet 17a. Thus, the air curtain 12 is formed on the rear side of the exhaust gas outlet 4a of the exhaust gas pipe 4.

In the case of the embodiment shown in FIGS. 3 (a), (b), and (c), as in the case of the embodiment shown in FIGS. It is possible to prevent smoke damage due to the exhaust gas discharged from the exhaust gas pipe 4.

In each of the above embodiments, as a measure against rainwater, the upper end portion of the exhaust gas pipe 4 is bent so that the exhaust gas outlet 4a is formed.
Although the case where the air is opened rearward is shown, the bending direction is arbitrary, and as an air supply source, as shown in FIG.
In the embodiment shown in Fig. 2, a compressed air system for miscellaneous purposes is used, and in each of the embodiments shown in Figs. 2 and 3, a mobile air blower is used. Needless to say, various modifications may be made without departing from the scope of the present invention.

[0021]

As described above, the smoke chimney prevention device for a marine chimney according to the present invention exhibits the following excellent effects.

(1) The smoke pipe and the exhaust gas pipe which are arranged in the chimney outer pipe of the marine chimney are arranged so that the exhaust gas pipe is on the rear side of the smoke pipe, and the rear side of the exhaust gas pipe and the chimney outer pipe. Air is blown out in a curtain shape above the position between the rear side wall and the air blown upward to form an air curtain on the rear side of the upper end of the exhaust gas pipe. Therefore, an air curtain can be formed on the rear side of the upper end of the exhaust gas pipe, and when the ship berth is anchored, the exhaust gas discharged from the upper end of the exhaust gas pipe is prevented from flowing backward by the air curtain, and Exhaust gas will be carried upward along the air curtain, preventing the exhaust gas from flowing into facilities and living areas near the port,
Smoke damage due to exhaust gas can be prevented.

(2) A plurality of air supply pipes are arranged on the rear side of the exhaust gas pipe, the air supply pipes are arranged in the left-right direction, and the upper ends of the air supply pipes are located at a position lower than the upper end of the exhaust gas pipe. Further, an air blowout nozzle is provided at the upper end opening of each of the air supply pipes, and air blown upward from the air supply source through the air blowout nozzle causes an air curtain to the rear side of the upper end of the exhaust gas pipe. With such a structure, the rearward flow of the exhaust gas discharged from the upper end of the exhaust gas pipe can be blocked with a simple structure, and smoke damage due to the exhaust gas can be prevented.

(3) A diffuser duct is provided on the rear side of the exhaust gas pipe so as to expand toward the upper end, and the upper end of the diffuser duct is opened as an air outlet at a position lower than the upper end of the exhaust gas pipe. The air blown upward from the diffuser duct through the air outlet of the diffuser duct forms an air curtain on the rear side of the upper end of the exhaust gas pipe. Thus, the air curtain can be formed uniformly, the backward flow of the exhaust gas discharged from the upper end of the exhaust gas pipe can be blocked, and the smoke damage due to the exhaust gas can be prevented.

(4) A corrugated plate is arranged on the rear side of the exhaust gas pipe so that the irregularities are arranged in the left-right direction, and a plurality of air flow paths are provided between the corrugated plate and the inner surface of the rear side wall of the chimney outer cylinder. The upper end of each air passage is lower than the upper end of the exhaust gas pipe, the upper end of each air passage is an air outlet, and further upward from the air supply source through the air outlet of each air passage. The air curtain blown to the rear side of the upper end of the exhaust gas pipe is formed by the air blown into the air duct, so that the air curtain blown from the air flow path using a part of the chimney outer cylinder Can be formed, the rearward flow of the exhaust gas discharged from the upper end of the exhaust gas pipe can be prevented, and the smoke damage due to the exhaust gas can be prevented.

(5) By the above (2), (3) and (4), it is not necessary to form a complicated exhaust gas pipe piping guide route in the narrow chimney outer cylinder, and the optimum exhaust gas pipe arrangement and piping route are provided. Can be achieved.

(6) As an air supply source, a compressed air system for miscellaneous purposes equipped in the hull or a mobile air blower for supplying fresh air in the hull is used to provide a dedicated compressed air source or a dedicated air source. There is no need to prepare a ventilator, etc.

(7) Since the exhaust gas is blown out from the upper end of the exhaust gas pipe in a horizontal direction, it is not necessary to separately take measures against rainwater infiltration.

[Brief description of drawings]

FIG. 1 shows an embodiment of a smoke chimney prevention device for a marine chimney according to the present invention, in which (A) is a schematic sectional side view and (B) is a view taken in the direction of arrow AA of (A).

FIG. 2 shows another embodiment of the present invention, in which (a)
Is a schematic sectional side view, (b) is a view taken in the direction of B-B in (a), and (c) is a view taken in the direction of C-c in (a).

FIG. 3 shows still another embodiment of the present invention,
(A) is a schematic sectional side view, (B) is a view taken in the direction of arrow D-D of (A), and (C) is a view taken in the direction of E-E of (A).

FIG. 4 is a schematic side view showing an example of a conventional smoke countermeasure for a marine chimney.

[Explanation of symbols]

1 marine chimney 2 Hull upper structure 3 chimney outer cylinder 3a rear side wall 4 exhaust gas pipe 4a Exhaust gas outlet 5 smoke pipe 6 Outer cylinder top plate 8 Air supply pipe 11 Air blowing nozzle 12 Air curtain 14 Diffuser duct 14a Air outlet 16 corrugated board 17 Air flow path 17a Air outlet

Claims (6)

[Claims] 1. A smoke pipe and an exhaust gas pipe arranged in a chimney outer cylinder of a marine chimney are arranged so that the exhaust gas pipe is located on the rear side of the smoke pipe, and the rear side of the exhaust gas pipe and the chimney outer cylinder are arranged. A structure in which air is blown out in a curtain shape above the position between the rear side wall and the air blown upward forms an air curtain on the rear side of the upper end of the exhaust gas pipe. A smoke chimney prevention device for marine chimneys. 2. A smoke pipe and an exhaust gas pipe arranged in a chimney outer cylinder of a marine chimney are arranged so that the exhaust gas pipe is on the rear side of the smoke pipe, and a plurality of air supplies are provided on the rear side of the exhaust gas pipe. A pipe is arranged, the air supply pipes are arranged in the left-right direction, the upper end of each air supply pipe is opened at a position lower than the upper end of the exhaust gas pipe, and further, at the upper end opening of each air supply pipe. A chimney for ships, characterized in that an air blowing nozzle is provided, and air blown upward from the air supply source through the air blowing nozzle forms an air curtain on the rear side of the upper end portion of the exhaust gas pipe. Smoke prevention device. 3. A smoke pipe and an exhaust gas pipe, which are arranged in a chimney outer cylinder of a marine chimney, are arranged so that the exhaust gas pipe is on the rear side of the smoke pipe, and the rear side of the exhaust gas pipe is directed toward the upper end. A diffuser duct is provided so as to expand, the upper end of the diffuser duct is opened as an air outlet at a position lower than the upper end of the exhaust gas pipe, and further blown upward from an air supply source through the air outlet of the diffuser duct. A smoke pollution control device for a marine chimney, comprising a structure in which an air curtain is formed behind air at the upper end of the exhaust gas pipe. 4. A smoke pipe and an exhaust gas pipe arranged in a chimney outer cylinder of a marine chimney are arranged so that the exhaust gas pipe is on the rear side of the smoke pipe, and a corrugated plate is arranged on the rear side of the exhaust gas pipe. The unevenness is arranged in the left-right direction to form a plurality of air flow paths between the corrugated plate and the inner surface of the rear side wall of the chimney outer cylinder, and the upper ends of the respective air flow paths are located above the upper end of the exhaust gas pipe. As a low position, the upper end of each of the air passages is used as an air outlet, and further, air blown upward from an air supply source through the air outlets of the air passages is provided on the rear side of the upper end of the exhaust gas pipe. A smoke damage prevention device for a marine chimney, which is configured to form an air curtain. 5. The marine chimney according to claim 1, 2, 3 or 4, wherein a compressed air system for miscellaneous purposes mounted on a hull or a mobile air blower for supplying fresh air in the hull is used as an air supply source. Smoke prevention device. 6. The smoke damage prevention device for a marine chimney according to claim 1, 2, 3, 4 or 5, wherein the exhaust gas is blown from the upper end of the exhaust gas pipe in a lateral direction.