WO2016038727A1

WO2016038727A1 - Marine heat supply system

Info

Publication number: WO2016038727A1
Application number: PCT/JP2014/074137
Authority: WO
Inventors: 知義瀧口
Original assignee: 株式会社マリタイムイノベーションジャパン
Priority date: 2014-09-11
Filing date: 2014-09-11
Publication date: 2016-03-17

Abstract

This heat supply system (1) is provided with: an exhaust gas economizer (14) for collecting heat from exhaust gas that has been selected in a mutually exclusive manner from exhaust gas of a prime mover (11) which is installed in a ship and provides propulsion to the ship or exhaust gas of an incinerator (12) that burns combustibles produced inside the ship, said combustibles including impurities, etc., separated from fuel oil before consumption by the prime mover (11); a steam-separating drum (15) for separating water vapor from water in a liquid-gas state by using heat collected by the exhaust gas economizer (14); and a compressor (17) for compressing the water vapor separated by the steam-separating drum (15) and raising the temperature thereof. The water vapor compressed by the compressor (17) is supplied to heat-using devices (18). When the ship moves at a normal speed and the load of the prime mover (11) is larger than or equal to a predetermined threshold, the exhaust gas of the prime mover (11) is delivered to the exhaust gas economizer (14). When the ship stops or moves at a very slow speed and the load of the prime mover (11) is less than the predetermined threshold, the exhaust gas of the incinerator (12) is delivered to the exhaust gas economizer (14).

Description

Marine heat supply system

The present invention relates to a technique for recovering and using heat from exhaust gas of a device mounted on a ship.

There is a technology for recovering heat from the exhaust gas from the prime mover and using the heat recovered at the heat utilization facility. For example, in Patent Document 1, the first steam generated by a heat medium heated by the heat obtained from the surrounding environment after preheating with the exhaust gas of the prime mover is heated and pressurized by the compressor, and preheated by the exhaust gas of the prime mover. After that, the second steam is generated by the heat medium heated by the first steam after the pressure is made higher than that of the first steam by the pressurizing pump, and the second steam is compressed by the compressor and then supplied to the heat utilization facility. An energy supply system has been proposed.

JP 2007-333336 A

The ship is equipped with a prime mover that generates thrust for navigation. Since the exhaust gas of the motor mounted on a ship usually has a larger amount of heat energy than the atmosphere, water as a heat medium is heated by a heat exchanger called an exhaust gas economizer (or economizer) and becomes steam by heating. There is a mechanism for supplying the heat medium to a heat utilization device such as a heating device for heating the fuel or lubricating oil of the prime mover or a heating device for heating the inside of the ship.

In the mechanism for supplying heat recovered from the exhaust gas of the prime mover to the heat utilization device by the exhaust gas economizer described above, naturally, heat is supplied while the prime mover is not operating or during operation in an extremely low load range. Absent. In addition, with the recent rise in crude oil prices, there are increasing situations in which ships navigate at low speeds in order to improve fuel efficiency. When the prime mover load becomes smaller than a predetermined value during low-speed navigation, heat recovery by the exhaust gas economizer becomes insufficient. Therefore, in the conventional technology, when the heat energy of the heat medium heated by the exhaust gas economizer is insufficient, the fuel oil is burned by the burner and the heat medium is reheated to raise the temperature and pressure, and then to the heat utilization device. The supply system is adopted. In the case of this conventional technique, energy consumption during heating by the burner is large, and the effect of recovering thermal energy from the exhaust gas is reduced. In addition, equipment for heating the heat medium by the burner (auxiliary boiler, composite boiler, etc.) causes an increase in cost and occupies a limited space in the ship.

The present invention has been made in view of the above-mentioned background, and when the exhaust gas of the prime mover that gives propulsive force to the ship cannot be obtained, or even if the exhaust gas of the prime mover is obtained, the thermal energy of the exhaust gas is small. To provide a mechanism that enables the necessary heat supply to the heat utilization device without requiring facilities for heating the heat medium used for heat recovery of the exhaust gas even when heat recovery is impossible due to too much Objective.

In order to solve the above-described problems, the present invention is mounted on a ship, and a heat exchanger that performs heat exchange between an exhaust gas having a temperature higher than the atmospheric temperature and a heat medium, and the heat exchanger that is heated in the heat exchanger. A heat supply system that supplies a heat medium to a heat utilization device mounted on the ship, and a compression that is arranged on a movement path of the heat medium in the heat supply system and compresses the heat medium to a predetermined pressure A first exhaust gas supply system that guides the exhaust gas of the motor that gives propulsion to the ship to the heat exchanger, and the heat exchange of the exhaust gas of the incinerator that incinerates combustibles generated in the ship A heat supply system comprising a second exhaust gas supply system leading to the vessel is proposed.

Further, according to the present invention, as one aspect of the above-described heat supply system, the second exhaust gas supply system allows the exhaust gas of the prime mover to be guided to the heat exchanger by the first exhaust gas supply system. While the exhaust gas from the incinerator is not led to the heat exchanger and the exhaust gas from the incinerator is led to the heat exchanger by the second exhaust gas supply system, the prime mover is driven by the first exhaust gas supply system. A path for changing at least part of the path of the exhaust gas of the first exhaust gas supply system and the path of the exhaust gas of the second exhaust gas supply system so that the exhaust gas of the first exhaust gas is not led to the heat exchanger We propose a configuration with a change mechanism.

Also, the present invention proposes, as an aspect of the above-described heat supply system, a configuration including a fuel oil supply system that supplies fuel oil that burns with the combustible material in the incinerator to the incinerator.

According to the present invention, when the exhaust gas of the prime mover that gives propulsive power to the ship cannot be obtained, or even if the exhaust gas of the prime mover is obtained, the heat energy of the exhaust gas is too small and the heat recovery by the heat exchanger is possible. If it is not possible, heat recovery is performed by the heat exchanger from the exhaust gas from the incinerator that burns combustibles generated in the ship, such as impurities in the fuel oil, so that the boiler for cooking the heat medium used for heat recovery Necessary heat supply to the heat utilization device is performed without installing the above.

The figure which showed the structure of the heat supply system (1st mode) concerning one Embodiment. The figure which showed the structure of the heat supply system (2nd mode) concerning one Embodiment. The figure which showed the structure of the heat supply system concerning one modification. The figure which showed the structure of the heat supply system concerning one modification.

[Embodiment]
Hereinafter, the heat supply system 1 concerning one Embodiment of this invention is demonstrated. The heat supply system 1 is mounted on a ship and moves as the ship navigates.

The heat supply system 1 performs heat recovery from the exhaust gas of the prime mover that gives propulsion to the ship and the exhaust gas selected exclusively from the exhaust gas of the incinerator that incinerates the combustible material generated in the ship, This is a mechanism for supplying the recovered heat to a heat utilization device such as a fuel oil heating device or a heating device mounted on the ship.

The heat supply system 1 operates in either a first mode in which heat is recovered from the exhaust gas from the prime mover or a second mode in which heat is recovered from the exhaust gas from the incinerator. FIG. 1 is a diagram showing a configuration of a heat supply system 1 operating in the first mode. FIG. 2 is a diagram showing a configuration of the heat supply system 1 operating in the second mode.

First, the heat supply system 1 includes a prime mover 11 that gives propulsion to the ship and an incinerator 12 that incinerates combustibles generated in the ship. The prime mover 11 is a diesel engine, for example, but the type is not limited to a diesel engine. The combustible material generated in the ship incinerated by the incinerator 12 includes, for example, fuel oil discharged from the fuel oil before being consumed by the prime mover 11, fuel oil discharged when draining the fuel tank, and an engine room Examples include, but are not limited to, oils separated from bilges generated by the above, combustibles of individuals, and the like. Hereinafter, an object to be incinerated by the incinerator 12 is referred to as “waste oil” for convenience. The heat supply system 1 includes a waste oil tank 13 for temporarily storing waste oil before being incinerated in the incinerator 12.

Further, the heat supply system 1 includes an exhaust gas economizer 14 (an example of a heat exchanger) that recovers heat from the exhaust gas of the prime mover 11 or the exhaust gas of the incinerator 12, and water heated by the heat recovered by the exhaust gas economizer 14 ( A steam separation drum 15 that separates water vapor from an example of a heat medium) and a pump 16 that circulates water between the exhaust gas economizer 14 and the steam separation drum 15 are provided.

The heat supply system 1 also includes a compressor 17 that compresses the water vapor to a predetermined pressure when the water vapor separated by the vapor separation drum 15 is less than a predetermined pressure, and a compressor 17 that compresses the water vapor as necessary. One or more heat utilization devices 18-1 to 18-i (i is an arbitrary natural number) that utilize the heat of warm water vapor are provided. Hereinafter, the heat utilization devices 18-1 to 18-i are collectively referred to as “heat utilization device 18”. A bypass is provided between the steam separation drum 15 and the compressor 17 to guide the water vapor separated by the steam separation drum 15 to the heat supply system 1 without passing through the compressor 17. On this bypass, there is provided a valve 19 that opens when the water vapor separated by the vapor separation drum 15 is above a predetermined pressure, and closes in other cases. In addition, a valve 20 that closes when the water vapor separated by the steam separation drum 15 is equal to or higher than a predetermined pressure and opens in other cases is provided on a path that guides the water vapor separated by the steam separation drum 15 to the compressor 17. Is provided.

In addition, the heat supply system 1 includes a drain cooler 21 that cools the drain from the heat utilization device 18, a cascade tank 22 that receives water that has become liquid by the drain cooler 21, and water that is received in the cascade tank 22 as exhaust gas. A pump 23 that leads to the economizer 14 is provided.

In the heat supply system 1 illustrated in FIG. 1 or FIG. 2, the exhaust gas economizer 14 includes a first heat exchange unit 141 and a second heat exchange unit 142. The water led from the cascade tank 22 to the exhaust gas economizer 14 is heated by the first heat exchange unit 141, led to the steam separation drum 15, and led from the second heat exchange unit 142 through a separate system path. Combined with water (mixed state of liquid and gas), it is led to the second heat exchange unit 142. Then, after being heated again by the second heat exchange unit 142, it is guided again to the steam separation drum 15. As described above, the water guided from the cascade tank 22 to the exhaust gas economizer 14 is not directly guided to the second heat exchange unit 142, but is heated up by preliminary heating by the first heat exchange unit 141 and then joined to the steam separation drum 15. By doing so, the temperature difference between the heat mediums that merge in the vapor separation drum 15 is reduced, and unnecessary phase changes of the heat medium are avoided. In addition, the first heat exchange unit 141 is not provided in the exhaust gas economizer 14, and other heat sources such as exhaust heat of an air cooler of a generator engine are used for heating water led from the cascade tank 22 to the exhaust gas economizer 14. May be.

Note that a path for leading water (heat medium) from the exhaust gas economizer 14 to the steam separation drum 15, a path for guiding water vapor (heat medium) separated in the steam separation drum 15 to the compressor 17, and compression in the compressor 17. The path that guides the steam (heat medium) to the heat utilization device 18 constitutes an example of a heat supply system that supplies the heat medium heated in the exhaust gas economizer 14 to the heat utilization device 18.

Further, the heat supply system 1 includes switching valves 221 to 226 (an example of a path changing mechanism). The switching valve 221 is disposed on the downstream side of the exhaust pipe 31 that receives the exhaust gas of the prime mover 11, and makes the exhaust pipe 31 communicate exclusively with either the exhaust pipe 32 or the exhaust pipe 33. The switching valve 222 is disposed downstream of the exhaust pipe 34 that receives the exhaust gas from the incinerator 12, and makes the exhaust pipe 34 communicate exclusively with either the exhaust pipe 35 or the exhaust pipe 36. The switching valve 223 is disposed on the downstream side of the exhaust pipe 33 and the exhaust pipe 36, and exclusively connects either the exhaust pipe 33 or the exhaust pipe 36 to the exhaust pipe 37 that guides the exhaust gas to the exhaust gas economizer 14. .

The switching valve 224 is disposed on the downstream side of the exhaust pipe 38 that receives the exhaust gas after heat recovery is performed in the exhaust gas economizer 14, and the exhaust pipe 38 is exclusive to either the exhaust pipe 39 or the exhaust pipe 40. Communicate with. The switching valve 225 is disposed on the downstream side of the exhaust pipe 32 and the exhaust pipe 39, and either the exhaust pipe 32 or the exhaust pipe 39 is exclusively used for the exhaust pipe 41 that guides the exhaust gas of the prime mover 11 to the outside of the ship. Communicate. The switching valve 226 is disposed downstream of the exhaust pipe 35 and the exhaust pipe 40, and either the exhaust pipe 35 or the exhaust pipe 40 is exclusive to the exhaust pipe 42 that guides the exhaust gas from the incinerator 12 to the outside of the ship. Communicate with.

When the ship is navigating at a certain speed or more and the load of the prime mover 11 is equal to or greater than a predetermined threshold, the exhaust gas of the prime mover 11 is heat energy necessary for the heat supply system 1 to recover heat from the exhaust gas. Have quantity. In this case, the heat supply system 1 operates in the first mode shown in FIG.

In the first mode, the switching valve 221 causes the exhaust pipe 31 to communicate with the exhaust pipe 33, and the switching valve 223 causes the exhaust pipe 33 to communicate with the exhaust pipe 37. The switching valve 224 causes the exhaust pipe 38 to communicate with the exhaust pipe 39, and the switching valve 225 allows the exhaust pipe 39 to communicate with the exhaust pipe 41. As a result, after the exhaust gas of the prime mover 11 is led to the exhaust gas economizer 14, a path (an example of a first exhaust gas supply system) that leads outside the ship is formed.

In the first mode, the switching valve 222 causes the exhaust pipe 34 to communicate with the exhaust pipe 35, and the switching valve 226 allows the exhaust pipe 35 to communicate with the exhaust pipe 42. As a result, a path (an example of a second exhaust gas supply system) that leads the exhaust gas from the incinerator 12 to the outside of the ship bypassing the exhaust gas economizer 14 is formed.

In the first mode, the exhaust gas from the prime mover 11 is guided to the exhaust gas economizer 14 and the exhaust gas from the incinerator 12 is not guided to the exhaust gas economizer 14. Therefore, even if waste oil is burned in the incinerator 12, heat recovery of exhaust gas from the incinerator 12 accompanying the combustion is not performed. In the first mode, it is possible to burn the waste oil in the incinerator 12, except for a special case where waste oil exceeding the capacity of the waste oil tank 13 is generated to recover the thermal energy generated by the combustion of the waste oil. In the first mode, the incinerator 12 does not burn waste oil. That is, the waste oil is not incinerated by the incinerator 12 while the ship is moving at a certain speed.

When the ship is stopped or navigating at a very low speed and the load of the prime mover 11 is less than a predetermined threshold, the heat supply system 1 recovers heat from the exhaust gas from the exhaust gas of the prime mover 11 Does not have the necessary amount of heat energy. In this case, the heat supply system 1 operates in the second mode shown in FIG.

In the second mode, the switching valve 222 causes the exhaust pipe 34 to communicate with the exhaust pipe 36, and the switching valve 223 causes the exhaust pipe 36 to communicate with the exhaust pipe 37. The switching valve 224 causes the exhaust pipe 38 to communicate with the exhaust pipe 40, and the switching valve 226 allows the exhaust pipe 40 to communicate with the exhaust pipe 42. As a result, after the exhaust gas from the incinerator 12 is led to the exhaust gas economizer 14, a path (an example of the second exhaust gas supply system) that leads to the outside of the ship is formed.

In the second mode, the switching valve 221 causes the exhaust pipe 31 to communicate with the exhaust pipe 32, and the switching valve 225 allows the exhaust pipe 32 to communicate with the exhaust pipe 41. As a result, a path (an example of a first exhaust gas supply system) that guides the exhaust gas of the prime mover 11 to the outside of the ship bypassing the exhaust gas economizer 14 is formed.

In the second mode, waste oil is burned by the incinerator 12, and heat recovery is performed from the exhaust gas of the incinerator 12 accompanying the combustion. When the exhaust gas economizer 14 has enough heat to recover from the exhaust gas of the incinerator 12 and can cover all the heat required by the heat utilization device 18, the incinerator 12 is used as fuel for the seed fire to continue the combustion of waste oil. Oil (for example, diesel oil) is supplied to the incinerator 12 through the fuel oil supply pipe 51. On the other hand, if the exhaust gas economizer 14 has insufficient heat to recover from the exhaust gas from the incinerator 12 and cannot provide all of the heat required by the heat utilization device 18, the incinerator 12 has insufficient thermal energy. Fuel oil (for example, heavy oil) used for combustion to supplement the amount is supplied to the incinerator 12 through a fuel oil supply pipe 52 (an example of a fuel oil supply system).

The fuel oil supply pipe 52 is connected to, for example, a waste oil supply pipe 50 that guides waste oil from the waste oil tank 13 to the incinerator 12 and is mixed with waste oil before being supplied to the incinerator 12. Lead the fuel oil (Figure 2). Instead, a configuration in which fuel oil such as heavy oil supplied via the fuel oil supply pipe 52 is directly burned in the incinerator 12 by providing a dedicated burner in the incinerator 12 or the like may be employed.

According to the heat supply system 1 described above, when the ship is navigating at a normal speed (first mode), heat recovery is performed from the exhaust gas of the prime mover 11, and when the generated steam is above the required pressure, heat is used. Directly supplied to the device 18. When the ship is navigating at a lower speed than the normal speed and the generated steam pressure due to heat recovery is less than the pressure required for the heat utilization device 18, the temperature of the heat medium is increased by the compressor 17. As a result, the heat energy of the exhaust gas from the prime mover 11 is recovered until reaching a low temperature range, and heating of the heat medium by a burner such as a boiler is not required.

Further, according to the heat supply system 1 described above, when the ship is stopped or navigating at a very low speed (second mode), heat is recovered from the exhaust gas of the incinerator 12, and the recovered heat is heated. It is supplied to the utilization device 18. At that time, the compressor 17 compresses the heat medium (water vapor) and raises the temperature of the heat medium. As a result, the heat medium is not heated by a burner such as a boiler. The thermal energy of the exhaust gas is recovered. Further, when the thermal energy recovered from the exhaust gas from the incinerator 12 is insufficient with respect to the total amount of thermal energy required by the heat utilization device 18, fuel oil such as heavy oil is supplied to the incinerator 12, and the incinerator is supplied. The shortage of thermal energy of 12 exhaust gases is compensated.

As a result, according to the heat supply system 1, facilities for heating a heat medium such as an auxiliary boiler and a composite boiler are not required, and cost reduction and effective use of space in the ship are realized. At the same time, fuel costs can be saved by using a heat source from combustion of waste oil or the like.

[Modification]
The above-described embodiments can be variously modified within the scope of the technical idea of the present invention. Examples of these modifications are shown below. These modifications may be combined as appropriate.

[First Modification]
In the heat supply system 1 described above, the exhaust gas from the prime mover 11 and the incinerator 12 is used as the exhaust gas to be heat recovered. In addition to the prime mover 11 and the incinerator 12, when the ship is equipped with a device that generates exhaust gas having a temperature higher than the atmosphere, the heat supply system 1 uses the exhaust gas of the device as a target for heat recovery. A configuration (hereinafter referred to as “first modification”) may be employed.

FIG. 3 is a diagram showing a configuration of the heat supply system 1 according to the first modification. In addition, FIG. 3 has shown the structure of the heat supply system 1 concerning the 1st modification in 2nd mode. The configuration of the heat supply system 1 according to the first modification in the first mode is the same as the configuration shown in FIG. 3 except that the switching valves 221 to 226 are in the state shown in FIG.

The heat supply system 1 according to the first modification includes a motor 61 that drives a generator that supplies power to a power consuming device mounted on a ship, and an exhaust gas economizer 62 that recovers heat from the exhaust gas of the motor 61 ( An example of a heat exchanger).

The exhaust gas of the prime mover 61 is led from the prime mover 61 to the exhaust gas economizer 62 by the exhaust pipe 71 (an example of a third exhaust gas supply system), and is led from the exhaust gas economizer 62 to the outside of the ship by the exhaust pipe 72.

In the configuration illustrated in FIG. 3, a part of the water after the water vapor is separated in the steam separation drum 15 is supplied to the exhaust gas economizer 62 by the pump 81. Water (mixed state of liquid and gas) heated in the exhaust gas economizer 62 is guided to the steam separation drum 15 and water (mixed state of liquid and gas) heated in the second heat exchange unit 142 of the exhaust gas economizer 14. Mixed.

Note that the position of the exhaust gas economizer 62 in the heat medium (water) flow path is not limited to the position illustrated in FIG. 3. For example, a configuration in which the exhaust gas economizer 62 is used as an alternative to the first heat exchange unit 141 may be employed. In this case, the low temperature water led from the cascade tank 22 by the pump 23 is heated by the heat recovered from the exhaust gas of the prime mover 61 by the exhaust gas economizer 62 and then led to the steam separation drum 15.

According to the first modification, in addition to the exhaust gas of the prime mover 11 or the incinerator 12, heat recovered from the exhaust gas discharged from the apparatus such as the prime mover 61 is used. As a result, for example, the amount of fuel oil supplied to the incinerator 12 via the fuel oil supply pipe 52 and combusted in order to make up for the heat energy that is insufficient in the second mode is preferably reduced.

[Second Modification]
In the heat supply system 1 described above, the exhaust gas of the prime mover 11 and the exhaust gas of the incinerator 12 are supplied exclusively to the same exhaust gas economizer 14 by changing the exhaust gas path by the switching valves 221 to 226. Configuration is adopted. Instead of this, the heat supply system 1 is separately provided with an exhaust gas economizer that recovers heat from the exhaust gas of the prime mover 11 and an exhaust gas economizer that recovers heat from the exhaust gas of the incinerator 12 (hereinafter referred to as “second”). May be employed.

FIG. 4 is a diagram showing a configuration of the heat supply system 1 according to the second modification. The heat supply system 1 according to the second modified example does not include the switching valves 221 to 226, and the exhaust gas of the prime mover 11 is always guided to the exhaust gas economizer 14, is recovered, and is discharged outside the ship. On the other hand, the heat supply system 1 according to the second modification has the exhaust gas from the incinerator 12 at the same position as the exhaust gas economizer 62 (FIG. 3) provided in the heat supply system 1 according to the first modification in the path of the heat medium. An exhaust gas economizer 91 that recovers heat from the exhaust gas is provided.

In the second modified example, when the ship is navigating at a speed higher than a certain level and the exhaust gas of the prime mover 11 has sufficient heat energy to recover heat, the heat supply system 1 is driven by the exhaust gas economizer 14. The heat recovered from the 11 exhaust gases is supplied to the heat utilization device 18 (first mode).

On the other hand, when the ship is stopped or sailing at an extremely low speed and the exhaust gas of the prime mover 11 cannot be obtained, or when the exhaust gas of the prime mover 11 does not have enough heat energy to recover heat, the heat supply system 1 supplies heat recovered from the exhaust gas of the incinerator 12 by the exhaust gas economizer 91 to the heat utilization device 18 (second mode).

As with the heat supply system 1 according to the above-described embodiment, the heat supply system 1 according to the second modification described above also burns waste oil in the incinerator 12 while the ship is stopped or moving at an extremely low speed. Heat recovered from the exhaust gas from the incinerator 12 can be supplied to the heat utilization device 18. As a result, there is no need to provide equipment such as an auxiliary boiler for heating the heat medium. At the same time, fuel costs can be saved by burning waste oil or the like.

[Other variations]
(1) In the heat supply system 1 according to the above-described embodiment or modification, the heat medium used is water, but a heat medium other than water (including one in which an additive is added to water). May be adopted.

(2) The switching valves 221 to 226 employed in the heat supply system 1 according to the above-described embodiment are configured so that at least a part of the exhaust gas path of the exhaust gas supply system of the prime mover 11 and the exhaust gas system of the incinerator 12 is provided. It is an example of a route change mechanism to be changed, and the exhaust gas route is set so that any one of the exhaust gas selected from the exhaust gas of the prime mover 11 and the exhaust gas of the incinerator 12 is led to the exhaust gas economizer 14. Any structure may be adopted as long as it is a mechanism that changes at least a part.

(3) In the heat supply system 1 described above, the exhaust gas economizer 14 and the steam separation drum 15 are each provided as an independent separation type, but a plurality of them may be provided.

DESCRIPTION OF SYMBOLS 1 ... Heat supply system, 11 ... Prime mover, 12 ... Incinerator, 13 ... Waste oil tank, 14 ... Exhaust gas economizer, 15 ... Steam separation drum, 16 ... Pump, 17 ... Compressor, 18 ... Heat utilization apparatus, 19 ... Valve, DESCRIPTION OF SYMBOLS 20 ... Valve, 21 ... Drain cooler, 22 ... Cascade tank, 23 ... Pump, 31 ... Exhaust pipe, 32 ... Exhaust pipe, 33 ... Exhaust pipe, 34 ... Exhaust pipe, 35 ... Exhaust pipe, 36 ... Exhaust pipe, 37 ... Exhaust pipe 38 ... Exhaust pipe 39 ... Exhaust pipe 40 ... Exhaust pipe 41 ... Exhaust pipe 42 ... Exhaust pipe 50 ... Waste oil supply pipe 51 ... Fuel oil supply pipe 52 ... Fuel oil supply pipe 61 ... Motor, 62 ... exhaust gas economizer, 71 ... exhaust pipe, 72 ... exhaust pipe, 81 ... pump, 91 ... exhaust gas economizer, 141 ... first heat exchange unit, 142 ... second heat exchange unit, 221 ... switching valve, 222 ... switching Valve, 22 ... switching valve, 224 ... switching valve, 225 ... switching valve, 226 ... switching valve

Claims

A heat exchanger mounted on a ship and performing heat exchange between an exhaust gas having a temperature higher than the atmospheric temperature and a heat medium;
A heat supply system for supplying the heat medium heated in the heat exchanger to a heat utilization device mounted on the ship;
A compressor that is arranged on a moving path of the heat medium in the heat supply system and compresses the heat medium until a predetermined pressure is reached;
A first exhaust gas supply system that guides the exhaust gas of a prime mover that provides propulsion to the ship to the heat exchanger;
A heat supply system comprising: a second exhaust gas supply system that guides exhaust gas from an incinerator that incinerates combustibles generated in the ship to the heat exchanger.
While the exhaust gas of the prime mover is led to the heat exchanger by the first exhaust gas supply system, the exhaust gas of the incinerator is not led to the heat exchanger by the second exhaust gas supply system, and the first The exhaust gas from the prime mover is not led to the heat exchanger by the first exhaust gas supply system while the exhaust gas from the incinerator is led to the heat exchanger by the exhaust gas supply system of 2. The heat supply system according to claim 1, further comprising a path changing mechanism that changes at least a part of an exhaust gas path of the first exhaust gas supply system and an exhaust gas path of the second exhaust gas supply system.
The heat supply system according to claim 1, further comprising a fuel oil supply system that supplies fuel oil that burns together with the combustible material in the incinerator to the incinerator.