Ship exhaust gas power generation system and ship

Abstract

This embodiment discloses a ship exhaust gas power generation system and a ship. The ship exhaust gas power generation system includes an exhaust gas boiler, an exhaust gas pipeline, a heater, a steam turbine, an engine, and a fresh water cooling device. One end of the exhaust gas pipeline is connected to the exhaust gas boiler; the inlet of the heater is connected to the outlet of the exhaust gas boiler via a first fresh water delivery pipeline; the inlet of the steam turbine is connected to the first outlet of the heater; the generator is connected to the steam turbine; and the fresh water cooling device includes a condenser, a preheater, a second fresh water delivery pipeline, and a first delivery pump. The condenser is connected to the outlet of the steam turbine, one end of the second fresh water delivery pipeline is connected to the condenser, the other end of the second fresh water delivery pipeline is connected to the preheater, the preheater is connected to the heater, and the water outlet of the heater is connected to the exhaust gas boiler via a connecting pipeline. The system cleverly recycles heat from the exhaust gas, which helps reduce energy loss and saves usage costs.

Description

Technical Field

[0001] The present invention relates to the technical field of ship energy recovery, and in particular to a ship exhaust gas power generation system and a ship. Background Art

[0002] As global energy consumption continues to increase and the imbalance between supply and demand worsens, energy conservation and emission reduction have become key priorities for economic development. Currently, most ships utilize diesel engines as their main propulsion system and electric motors. However, due to various factors, such as incomplete combustion, friction losses, and exhaust heat loss, diesel engines achieve an effective power conversion efficiency of only approximately 40% of the heat generated by fuel combustion, while exhaust heat losses account for 60% of the total losses. Currently, this waste heat is directly discharged into the atmosphere without effective recovery and utilization, resulting in not only wasted energy but also significant air pollution. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides a ship exhaust gas power generation system and a ship.

[0004] In a first aspect, an embodiment of the present application provides a ship exhaust gas power generation system, comprising:

[0005] exhaust gas boilers;

[0006] An exhaust gas pipeline, one end of which is connected to the exhaust gas boiler, and the other end of which is connected to the main engine and the generator set of the ship;

[0007] a heater, wherein the inlet of the heater is connected to the outlet of the exhaust gas boiler via a first fresh water delivery pipeline;

[0008] a steam turbine, wherein an inlet end of the steam turbine is connected to the first outlet of the heater so that steam heated by the heater enters the steam turbine;

[0009] a generator connected to the steam turbine so that the generator generates electricity when driven by the steam turbine;

[0010] It also includes a fresh water cooling device, which includes a condenser, a preheater, a second fresh water delivery pipeline and a first delivery pump. The condenser is connected to the outlet end of the steam turbine, one end of the second fresh water delivery pipeline is connected to the condenser, and the other end of the second fresh water delivery pipeline is connected to the preheater. The first delivery pump is arranged on the second fresh water delivery pipeline and is used to pump the fresh water in the condenser into the preheater for heating. The preheater is connected to the heater.

[0011] In one embodiment, it also includes an input pipeline, one end of which is connected to the inlet of the exhaust gas boiler, and the other end of the input pipeline is connected to the water outlet of the ship's main engine and the generator set, so as to input fresh water used to cool the ship's main engine and the generator set into the exhaust gas boiler, and the water outlet end of the heater is connected to the exhaust gas boiler through a connecting pipeline.

[0012] In one embodiment, a central fresh water cooler is further included, which is connected to the condenser and is used to provide fresh water cooling to the condenser to quickly cool the fresh water in the condenser.

[0013] In one embodiment, a cylinder liner cooling device is further included, which includes a third fresh water delivery pipeline, a second delivery pump and a cylinder liner cooler. One end of the third fresh water delivery pipeline is connected to the preheater, and the other end of the third fresh water delivery pipeline is connected to the inlet end of the cylinder liner cooler. The outlet end of the cylinder liner cooler is connected to the main engine of the ship. The second delivery pump is provided on the third fresh water delivery pipeline, and is used to pump part of the fresh water in the preheater into the cylinder liner cooler for cooling.

[0014] In one embodiment, the preheater has a first water inlet, a first water outlet and a second water outlet, one end of the second fresh water delivery pipeline is connected to the first water inlet, one end of the third fresh water delivery pipeline is connected to the first water outlet, and the second water outlet is connected to the heater through a fourth fresh water delivery pipeline.

[0015] In one embodiment, a fifth fresh water delivery pipeline is further included, one end of the fifth fresh water delivery pipeline is connected to the water outlet of the main engine of the ship, and the other end of the fifth fresh water delivery pipeline is connected to the second water inlet of the preheater.

[0016] In one embodiment, a ship distribution board is further included, wherein the ship distribution board is connected to the generator via a wire, and the ship distribution board is used to supply power to electrical equipment in the ship.

[0017] In one embodiment, a first steam delivery pipeline is further included, one end of the first steam delivery pipeline is connected to the steam port of the exhaust gas boiler, and the other end of the first steam delivery pipeline is connected to the inlet of the heater.

[0018] In one embodiment, a second steam delivery pipeline is further included, one end of the second steam delivery pipeline is connected to the outlet of the heater, and the other end of the second steam delivery pipeline is connected to the steam turbine to pass the heated steam into the steam turbine.

[0019] In a second aspect, an embodiment of the present application further provides a ship, comprising the ship exhaust gas power generation system described in the first aspect.

[0020] Compared with the prior art, the above technical solutions provided by the embodiments of the present application have the following beneficial effects:

[0021] The exhaust gas generated by the ship's main engine and generator set is passed through an exhaust gas pipeline into the exhaust gas boiler, allowing the heat in the exhaust gas to heat the fresh water in the exhaust gas boiler to a steam state. The steam is then passed into the heater to heat and expand until it can drive the steam turbine. The steam turbine then runs to drive the engine to generate electricity, allowing the generator to generate power for the ship's electrical equipment. This clever recycling of the heat in the exhaust gas helps reduce energy loss and save costs. In addition, a condenser is used to condense the steam flowing out of the steam turbine to form fresh water. After secondary heating in the preheater and heater, it is returned to the exhaust gas boiler for use, realizing the recycling of fresh water and effectively reducing the frequent replenishment of fresh water. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of a ship exhaust gas power generation system of the present application.

[0023] Numbers in the figure:

[0024] 10. Exhaust gas boiler; 20. Ship's main engine and generator set; 30. Exhaust gas pipeline; 40. Heater; 50. Steam turbine; 60. Generator; 70. Fresh water cooling device; 71. Condenser; 72. Preheater; 73. Second fresh water delivery pipeline; 74. First delivery pump; 80. Input pipeline; 90. Central fresh water cooler; 100. Cylinder jacket cooling device; 101. Cylinder jacket cooler; 102. Second delivery pump; 103. Third fresh water delivery pipeline; 200. Fourth fresh water delivery pipeline; 300. Fifth fresh water delivery pipeline; 400. Ship's switchboard; 500. First steam delivery pipeline; 600. Second steam delivery pipeline. DETAILED DESCRIPTION

[0025] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings and are constructed and operated in specific directions. They are only for the convenience of describing the technical solution and do not indicate that the devices or components referred to must have specific directions. Therefore, they should not be understood as limiting the present invention.

[0026] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0027] Figure 1 The schematic diagram of a ship exhaust gas power generation system of the present application is shown. The ship exhaust gas power generation system includes: an exhaust gas boiler 10, an exhaust gas pipeline 30, a heater 40, a steam turbine 50 and a generator 60.

[0028] Specifically, one end of the exhaust gas pipeline 30 is connected to the exhaust gas boiler 10, and the other end is connected to the ship's main engine and generator set 20. The inlet of the heater 40 is connected to the outlet of the exhaust gas boiler 10 via a first fresh water delivery pipeline. The inlet of the steam turbine 50 is connected to the first outlet of the heater 40, allowing steam heated by the heater 40 to enter the steam turbine 50. The generator 60 is connected to the steam turbine 50 to generate electricity.

[0029] Among them, it also includes a fresh water cooling device 70, which includes a condenser 71, a preheater 72, a second fresh water delivery pipeline 73 and a first delivery pump 74. The condenser 71 is connected to the outlet end of the steam turbine 50, one end of the second fresh water delivery pipeline 73 is connected to the condenser 71, and the other end of the second fresh water delivery pipeline 73 is connected to the preheater 72. The first delivery pump 74 is provided on the second fresh water delivery pipeline 73, and is used to pump the fresh water in the condenser 71 into the preheater 72 for heating. The preheater 72 is connected to the heater 40, and the water outlet end of the heater 40 is connected to the exhaust gas boiler 10 through a connecting pipeline.

[0030] Exemplarily, the exhaust gas pipeline 30 is used to pass the exhaust gas generated by the ship's main engine and the generator set into the exhaust gas boiler 10. Since the exhaust gas generated by the ship's main engine and the generator set has a relatively high heat content, the heat in the exhaust gas can be used to heat the fresh water in the exhaust gas boiler 10, so that the fresh water is heated to form a steam state, which facilitates the subsequent passage of steam into the steam turbine 50 for driving, thereby realizing the recovery and utilization of the exhaust gas heat, which is beneficial to reducing energy loss and saving usage costs.

[0031] For example, heater 40 is used to further heat the steam, causing it to expand to a state capable of driving steam turbine 50, thereby enabling steam turbine 50 to drive the engine to generate electricity, thereby enabling generator 60 to generate electricity for use by the ship's electrical equipment. It should be noted that heater 40 can be any component commonly used to heat steam in the prior art, and is not specifically limited thereto.

[0032] For example, since heated steam is continuously introduced into the steam turbine 50, steam will flow out of the steam turbine 50 after driving the steam turbine 50 to operate. In order to avoid wasting steam after use, in this embodiment, the steam flowing out of the steam turbine 50 is introduced into the condenser 71, so that the steam is re-condensed to form fresh water under the action of the condenser 71, and then pumped to the preheater 72 for preheating by the first delivery pump 74, and then enters the heater 40 for secondary heating, and finally is re-introduced into the exhaust gas boiler 10 for use, thereby realizing the recycling of fresh water and effectively reducing the frequent replenishment of fresh water.

[0033] The ship exhaust gas power generation system based on the above-mentioned technical features uses an exhaust gas pipeline 30 to pass the exhaust gas generated by the ship's main engine and generator set into the exhaust gas boiler 10, so that the heat in the exhaust gas can heat the fresh water in the exhaust gas boiler 10 to a steam state. The steam is then passed into the heater 40 to heat and expand until it can drive the steam turbine 50. The steam turbine 50 then operates to drive the engine to generate electricity, thereby allowing the generator 60 to generate power for the ship's electrical equipment. This cleverly recycles the heat in the exhaust gas, helping to reduce energy loss and save costs. In addition, the steam flowing out of the steam turbine 50 is condensed by the condenser 71 to form fresh water. After secondary heating in the preheater 72 and heater 40, the fresh water is then returned to the exhaust gas boiler 10 for use, achieving fresh water recycling and effectively reducing the need for frequent fresh water replenishment.

[0034] In one embodiment, an input pipe 80 is further included, one end of which is connected to the inlet of the exhaust gas boiler 10, and the other end of the input pipe 80 is connected to the water outlet of the ship's main engine and the generator set 20, so as to input fresh water used to cool the ship's main engine and the generator set 20 into the exhaust gas boiler 10.

[0035] For example, the ship's main engine and the generator set are connected by means of an input pipe 80 so that the fresh water used to cool the ship's main engine and the generator set can be input into the exhaust gas boiler 10 for reuse, thereby realizing the recycling of fresh water without the need to add additional fresh water, which is beneficial to saving fresh water resources.

[0036] In one embodiment, a central fresh water cooler 90 is further included. The central fresh water cooler 90 is connected to the condenser 71 and is used to provide fresh water cooling to the condenser 71 so as to quickly cool the fresh water in the condenser 71.

[0037] For example, after steam is condensed into fresh water through condenser 71, the heat content of the fresh water is still relatively high. If this water is directly introduced into the main engine of the ship, the heat will be introduced into the ship's main engine, which may cause damage to the ship's main engine. Therefore, in this embodiment, the condenser 71 is cooled by a central fresh water cooler 90, so that the heat in the fresh water is removed by the central fresh water cooler 90. This can quickly cool the fresh water in the condenser 71 to a temperature that meets the requirements of the ship's main engine, effectively avoiding damage to the ship's main engine.

[0038] In one embodiment, a cylinder jacket cooling device 100 is further included. The cylinder jacket cooling device 100 includes a third fresh water delivery pipeline 103, a second delivery pump 102, and a cylinder jacket cooler 101. One end of the third fresh water delivery pipeline 103 is connected to the preheater 72, and the other end of the third fresh water delivery pipeline 103 is connected to the inlet end of the cylinder jacket cooler 101. The outlet end of the cylinder jacket cooler 101 is connected to the main engine of the ship. The second delivery pump 102 is provided on the third fresh water delivery pipeline 103 and is used to pump part of the fresh water in the preheater 72 into the cylinder jacket cooler 101 for cooling.

[0039] For example, under the power of the second delivery pump 102, part of the fresh water in the preheater 72 is pumped into the cylinder jacket cooler 101 through the third fresh water delivery pipeline 103, so that the fresh water can be further cooled to a temperature value that can be used by the ship's main engine. The fresh water cooled by the cylinder jacket cooler 101 is then passed to the ship's main engine for use, realizing the recycling of fresh water and helping to save resources.

[0040] In one embodiment, the preheater 72 has a first water inlet, a first water outlet, and a second water outlet, one end of the second fresh water delivery pipeline 73 is connected to the first water inlet, one end of the third fresh water delivery pipeline 103 is connected to the first water outlet, and the second water outlet is connected to the heater 40 through the fourth fresh water delivery pipeline 200.

[0041] In one embodiment, a fifth fresh water delivery pipeline 300 is further included, one end of the fifth fresh water delivery pipeline 300 is connected to the water outlet of the main engine of the ship, and the other end of the fifth fresh water delivery pipeline 300 is connected to the second water inlet of the preheater 72.

[0042] For example, one end of the fifth fresh water delivery pipeline 300 is connected to the water outlet of the ship's main engine, and then the other end of the fifth fresh water delivery pipeline 300 is connected to the second water inlet of the preheater 72, so that the fresh water after cooling the ship's main engine can be passed into the preheater 72 for heating, and then heated by the heater 40 before entering the exhaust gas boiler 10, thereby realizing the recycling of fresh water and effectively avoiding the waste of fresh water after cooling the ship's main engine.

[0043] In one embodiment, the system further includes a shipboard switchboard 400, which is connected to the generator 60 via wires. The switchboard 400 is used to supply power to the electrical equipment on board the ship. It should be noted that the switchboard 400 is used to distribute power to the electrical equipment on board the ship. The connection structure between the switchboard 400 and the electrical equipment on board the ship is common knowledge to those skilled in the art. For details, please refer to prior art regarding the connection structure between the switchboard 400 and the electrical equipment on board the ship, and no further details will be given.

[0044] In one embodiment, a first steam delivery pipeline 500 is further included. One end of the first steam delivery pipeline 500 is connected to the steam outlet of the exhaust gas boiler 10, and the other end of the first steam delivery pipeline 500 is connected to the inlet of the heater 40. In this way, the first steam delivery pipeline 500 can be used to deliver steam from the exhaust gas boiler 10 to the heater 40 for heating, so that the steam can be heated and expanded to a state that drives the steam turbine 50.

[0045] In one embodiment, a second steam delivery pipeline 600 is further included. One end of the second steam delivery pipeline 600 is connected to the outlet of the heater 40, and the other end of the second steam delivery pipeline 600 is connected to the steam turbine 50 to pass the heated steam into the steam turbine 50. In this way, the second steam delivery pipeline 600 can be used to pass the steam further heated by the heater 40 into the steam turbine 50, ensuring that the steam can drive the steam turbine 50 to rotate and drive the generator 60 to generate electricity.

[0046] An embodiment of the present application also provides a ship, comprising the ship exhaust gas power generation system of the above embodiment.

[0047] According to the ship of the embodiment of the present application, the above-mentioned ship exhaust gas power generation system is adopted, and the technical effects thereof are consistent with those of the above-mentioned ship exhaust gas power generation system, which will not be described in detail here.

[0048] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A ship exhaust gas power generation system, characterized in that: include: exhaust gas boilers; An exhaust gas pipeline, one end of which is connected to the exhaust gas boiler, and the other end of which is connected to the main engine and the generator set of the ship; a heater, wherein the inlet of the heater is connected to the outlet of the exhaust gas boiler via a first fresh water delivery pipeline; a steam turbine, wherein an inlet end of the steam turbine is connected to the first outlet of the heater so that steam heated by the heater enters the steam turbine; a generator connected to the steam turbine so that the generator generates electricity when driven by the steam turbine; Wherein, it also includes a fresh water cooling device, which includes a condenser, a preheater, a second fresh water delivery pipeline and a first delivery pump. The condenser is connected to the outlet end of the steam turbine, one end of the second fresh water delivery pipeline is connected to the condenser, and the other end of the second fresh water delivery pipeline is connected to the preheater. The first delivery pump is provided on the second fresh water delivery pipeline and is used to pump the fresh water in the condenser into the preheater for heating. The preheater is connected to the heater, and the water outlet end of the heater is connected to the exhaust gas boiler through a connecting pipeline. The invention also includes an input pipeline, a cylinder jacket cooling device and a fifth fresh water delivery pipeline, one end of the input pipeline is connected to the inlet of the exhaust gas boiler, and the other end of the input pipeline is connected to the water outlet of the ship's main engine and the generator set, so as to input fresh water used to cool the ship's main engine and the generator set into the exhaust gas boiler; the cylinder jacket cooling device includes a third fresh water delivery pipeline, a second delivery pump and a cylinder jacket cooler, one end of the third fresh water delivery pipeline is connected to the preheater, the other end of the third fresh water delivery pipeline is connected to the inlet end of the cylinder jacket cooler, and the outlet end of the cylinder jacket cooler is connected to the ship's main engine and the generator set, the second delivery pump is provided on the third fresh water delivery pipeline, and is used to pump part of the fresh water in the preheater into the cylinder jacket cooler for cooling; one end of the fifth fresh water delivery pipeline is connected to the water outlet of the ship's main engine and the generator set, and the other end of the fifth fresh water delivery pipeline is connected to the second water inlet of the preheater.

2. The ship exhaust gas power generation system according to claim 1, characterized in that: The system also includes a central fresh water cooler, which is connected to the condenser and is used to provide fresh water cooling to the condenser so as to quickly cool the fresh water in the condenser.

3. The ship exhaust gas power generation system according to any one of claims 1 to 2, characterized in that: It also includes a ship distribution board, which is connected to the generator through a wire and is used to supply power to electrical equipment in the ship.

4. The ship exhaust gas power generation system according to claim 1, characterized in that: It also includes a first steam delivery pipeline, one end of which is connected to the steam port of the exhaust gas boiler, and the other end of which is connected to the inlet of the heater.

5. The ship exhaust gas power generation system according to claim 1, characterized in that: It also includes a second steam delivery pipeline, one end of which is connected to the outlet of the heater, and the other end of which is connected to the steam turbine to pass the heated steam into the steam turbine.

6. A ship, characterized in that: A ship exhaust gas power generation system comprising the ship exhaust gas power generation system according to any one of claims 1 to 5.

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