Diesel generating set for island

Abstract

The utility model discloses a diesel generating set for an island, which is characterized by further comprising an engine module, a power supply module and a control module, the heat exchange module is used for conducting heat exchange and cooling on hot water output by the cooling water way of the engine module; the smoke exhaust module is used for exhausting smoke generated by the engine module and heating the shell pass fluid output by the heat exchange module; by arranging the engine module, the heat exchange module, the smoke exhaust module and the sea water desalination module, waste heat of the generator set is fully utilized, energy is saved, and by adopting a series of protection measures such as corrosion prevention, moisture prevention and rust prevention, the engine can be used in the island for a long time, and the service life of the engine is prolonged. And faults and damages caused by environmental factors can be obviously reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to island power generation technical field especially, it relates to a diesel generating set for island. BACKGROUND

[0002] Island areas usually have unique climate characteristics, including high humidity, salt fog and condensation phenomena. Conventional diesel generating sets are easily damaged by salt fog and moisture under these conditions, leading to equipment corrosion, frequent failures and increased maintenance costs. SUMMARY

[0003] To solve the above technical problems, the utility model provides the following technical scheme, a diesel generating set for island further includes:

[0004] The engine module is used for generating electricity by diesel;

[0005] The heat exchange module is used for heat exchange and cooling of hot water output by the cooling water circuit of the engine module;

[0006] The exhaust module is used for discharging flue gas generated by the engine module and heating the shell side fluid output by the heat exchange module;

[0007] The seawater desalination module is used for desalination of seawater;

[0008] The engine module has a water outlet, a water inlet and an exhaust port, the heat exchange module has a tube inlet, a tube outlet, a shell inlet and a shell outlet, the exhaust module has a fluid inlet, a fluid outlet, a flue gas inlet and a flue gas outlet, the seawater desalination module has a seawater inlet, the water outlet of the engine module and the tube inlet of the heat exchange module are connected by a pipeline, the water inlet of the engine module and the tube outlet of the heat exchange module are connected by a pipeline, the shell outlet of the heat exchange module and the fluid inlet of the exhaust module are connected by a pipeline, the fluid outlet of the exhaust module and the seawater inlet of the seawater desalination module are connected by a pipeline, and the exhaust port of the engine module and the flue gas inlet of the exhaust module are connected by a pipeline.

[0009] Further, the exhaust module includes:

[0010] The exhaust pipe has a flue gas outlet and a flue gas inlet;

[0011] The heat exchange pipe is spirally arranged in the exhaust pipe, the heat exchange pipe has a liquid inlet and a liquid outlet at both ends, and both ends of the heat exchange pipe extend out of the outside of the exhaust pipe;

[0012] Spiral plate, the exhaust pipe is internally and fixedly provided with a spiral plate, the spiral plate is spirally arranged in the exhaust pipe, the spiral plate and the pipeline of the exhaust pipe form a spiral flue gas channel, and the heat exchange pipe is located in the flue gas channel.

[0013] The flue gas inlet of the exhaust pipe is connected with the flue gas outlet of the engine module through a pipeline, the liquid inlet of the heat exchange pipe is connected with the shell outlet of the heat exchange module through a pipeline, and the liquid outlet of the heat exchange pipe is connected with the seawater inlet of the seawater desalination module through a pipeline.

[0014] Further, the exhaust pipe comprises a shell A and a shell B, a plurality of semicircular spiral pieces are fixedly arranged in the shell A and the shell B, the shell A and the shell B are detachably connected, and the semicircular spiral pieces in the shell A and the semicircular spiral pieces in the shell B form a spiral plate after the shell A and the shell B are fixedly connected.

[0015] Further, the exhaust pipe further comprises:

[0016] Temperature sensor, the pipeline at the liquid inlet and the liquid outlet of the heat exchange pipe is provided with a temperature sensor.

[0017] Further, the exhaust pipe further comprises:

[0018] Three-way pipeline, one end of the three-way pipeline is fixedly connected with the flue gas inlet of the exhaust pipe, the second end of the three-way pipeline is connected with the flue gas outlet of the engine module through a pipeline, and the third end of the three-way pipeline is fixedly connected with an exhaust valve.

[0019] Air pressure sensor, the air pressure sensor is arranged on the three-way pipeline and is used for detecting the air pressure in the pipeline.

[0020] Further, the exhaust pipe further comprises:

[0021] Exhaust pipe, the first end of the exhaust pipe is fixedly connected with the exhaust outlet of the exhaust valve.

[0022] The pipeline between the liquid inlet of the heat exchange pipe and the shell outlet of the heat exchange module passes through the second end and the third end of the exhaust pipe.

[0023] Further, the pipeline between the second end and the third end of the exhaust pipe comprises an upper cover and a lower cover, the upper cover and the lower cover are detachably connected, the pipeline between the second end and the third end of the exhaust pipe is covered in the upper cover and the lower cover after the upper cover and the lower cover are fixedly connected, and a plurality of flue gas outlets are formed in the upper cover.

[0024] The beneficial effects of the utility model lie in:

[0025] 1. By setting the engine module, heat exchange module, exhaust module and seawater desalination module, make full use of the waste heat of the generator set, save energy, and through a series of corrosion, moisture, rust and other protection measures, the engine can significantly reduce the failure and damage caused by environmental factors in the long-term use of the island.

[0026] 2. By setting the spiral heat exchange pipe and spiral plate, the spiral flue cooperates with the spiral heat exchange pipe, greatly increases the heat exchange area, makes the heat exchange effect between the flue gas and the water better, and fully absorbs the heat energy of the flue gas.

[0027] 3. By dividing the exhaust pipe into detachable shell A and shell B, the heat exchange pipe is more convenient to install, and the semicircular spiral piece can also play a positioning role when the heat exchange pipe is installed, avoiding the sliding of the heat exchange pipe. The detachable exhaust pipe is also convenient for cleaning the inside of the exhaust pipe or repairing the heat exchange pipe.

[0028] 4. By setting temperature sensors on the pipelines at the liquid outlet and liquid inlet of the heat exchange pipe, the seawater temperature at both ends of the heat exchange pipe can be detected by the temperature sensors, so that the water flow and flow rate in the heat exchange pipe can be controlled and adjusted according to the temperature change, so as to achieve the best heat exchange effect.

[0029] 5. By setting the three-way pipe, exhaust valve and air pressure sensor, the air pressure at the flue gas inlet of the exhaust pipe can be detected, so that the exhaust valve is driven to open for pressure relief when the air pressure is too high, avoiding affecting the exhaust effect of the engine module and ensuring the normal work of the whole unit.

[0030] 6. By setting the exhaust bypass pipe, the flue gas discharged when the exhaust valve is relieved can have a certain heat exchange effect on the seawater in the pipeline between the liquid inlet of the heat exchange pipe and the shell outlet of the heat exchange module, avoiding waste of heat energy and making the overall heat exchange effect better.

[0031] 7. By dividing the pipeline with the second end and the third end of the exhaust bypass pipe into an upper cover and a lower cover, the pipeline between the liquid inlet of the heat exchange pipe and the shell outlet of the heat exchange module is convenient to install, and the second end and the third end of the exhaust bypass pipe cover the pipeline between the liquid inlet of the heat exchange pipe and the shell outlet of the heat exchange module, making the heat exchange effect better, and the flue gas after heat exchange is discharged from the smoke outlet at the top of the upper cover. BRIEF DESCRIPTION OF DRAWINGS

[0032] ATTACHMENT Figure 1 is a schematic diagram of the pipeline when each module of the generator set is running;

[0033] ATTACHMENT Figure 2 is a structure diagram of the exhaust module;

[0034] Figure 1 is a perspective view of the engine module; Figure 3 Figure 2 is a perspective view of the heat exchange module;

[0035] Figure 3 is a perspective view of the exhaust module; Figure 4 Figure 4 is a perspective view of the exhaust pipe, the exhaust bypass pipe;

[0036] Figure 5 is a perspective view of the shell A; Figure 5 Figure 6 is a perspective view of the shell B;

[0037] Figure 7 is a perspective view of the semi-circular spiral piece; Figure 6 Figure 8 is a perspective view of the heat exchange pipe in the spiral flue;

[0038] Figure 9 is a perspective view of the spiral plate formed by the semi-circular spiral piece; Figure 7 Figure 10 is a perspective view of the heat exchange pipe in the spiral flue;

[0039] Figure 11 is a perspective view of the heat exchange pipe in the spiral flue; Figure 8 Figure 12 is a perspective view of the heat exchange pipe in the spiral flue;

[0040] Figure 13 is a perspective view of the heat exchange pipe in the spiral flue; DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. In the description of the present application, it should be noted that the terms used herein are only used to describe the specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For the convenience of description, the sizes of the parts shown in the drawings are not drawn in accordance with the actual proportional relationship. The technologies, methods and devices known to those skilled in the relevant art can not be discussed in detail, but should be regarded as part of the authorized description. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of the exemplary embodiments can have different values, and it should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings. Embodiment 1

[0042] The embodiment provides a diesel generator set for islands, and further comprises:

[0043] An engine module 1 for generating electricity by diesel;

[0044] A heat exchange module 2 for heat exchange cooling of hot water output by a cooling water path of the engine module 1;

[0045] An exhaust module 3 for exhausting flue gas generated by the engine module 1 and heating shell side fluid output by the heat exchange module 2;

[0046] A seawater desalination module 4 for desalination of seawater;

[0047] The engine module 1 has a water path outlet, a water path inlet and an exhaust port, the heat exchange module 2 has a tube side inlet, a tube side outlet, a shell side inlet and a shell side outlet, the exhaust module 3 has a fluid inlet, a fluid outlet, a flue gas inlet and a flue gas outlet, the seawater desalination module 4 has a seawater inlet, the water path outlet of the engine module 1 and the tube side inlet of the heat exchange module 2 are connected through a pipeline, the water path inlet of the engine module 1 and the tube side outlet of the heat exchange module 2 are connected through a pipeline, the shell side outlet of the heat exchange module 2 and the fluid inlet of the exhaust module 3 are connected through a pipeline, the fluid outlet of the exhaust module 3 and the seawater inlet of the seawater desalination module 4 are connected through a pipeline, and the exhaust port of the engine module 1 and the flue gas inlet of the exhaust module 3 are connected through a pipeline.

[0048] In the technical solution, the heat exchange module 2 is a heat exchanger, the engine module 1 is a diesel generator, and the seawater desalination module 4 is a seawater desalination device (the working principles of the heat exchanger, the diesel generator and the seawater desalination module 4 are all prior art, and thus are not described in detail here).

[0049] The shell side inlet of the heat exchange module 2 is connected with a water pump 19 through a pipeline, the water pump 19 is used for pumping seawater, hot water is generated in the cooling water path of the engine module 1 when the engine module 1 is running, the hot water generated by the engine module 1 enters the heat exchange module 2 through the tube side inlet of the heat exchange module 2, exchanges heat with the ice-cold seawater, so that the hot water generated by the engine module 1 is cooled, then the heat-exchanged engine water path returns to the cooling water path inlet of the engine through the tube side outlet of the heat exchange module 2, and the engine is cooled again, and the heat-exchanged seawater is discharged from the shell side outlet of the heat exchange module 2 and input into the fluid inlet of the exhaust module 3 through a pipeline;

[0050] In addition, the engine module 1 generates high-temperature flue gas during operation, which is discharged to the atmosphere through the exhaust pipe 5. The high-temperature flue gas in the exhaust pipe 5 exchanges heat with the seawater input into the exhaust pipe 5, so that the flue gas continues to warm the seawater. The heated seawater is then input into the seawater desalination module 4, reducing the energy consumption for heating seawater. The engine is cooled while the seawater is heated multiple times, avoiding heating seawater from room temperature in the seawater desalination module 4.

[0051] In addition, the engine module 1, heat exchange module 2, and exhaust module 3 usually have exposed metal parts, which are treated with a surface treatment process of phosphating primer, epoxy primer, intermediate paint, and weather-resistant topcoat. Standard parts are made of stainless steel, the winding and insulating material are sprayed with a protective paint, a space heater and a winding moisture-proof heating band are installed inside the generator, moisture removal treatment is performed before starting, and the electrical components are designed for marine use, and the circuit board is treated with a three-proofing process.

[0052] The surface treatment process of phosphating primer, epoxy primer, and weather-resistant topcoat can effectively improve the corrosion resistance of the engine module 1, heat exchange module 2, and exhaust module 3, reduce the corrosion and damage of metal parts, and prolong the service life of the equipment.

[0053] The air humidity in island areas is high, which can easily cause the engine and electrical components to be corroded by moisture. By spraying a protective paint on the winding and insulating material, and installing a space heater and a winding moisture-proof heating band inside the generator, the electrical components can be effectively protected from moisture and short circuits. Moisture removal treatment before starting ensures stable operation of the equipment.

[0054] The electrical components are designed for marine use, and the circuit board is treated with a three-proofing process. Even in harsh environments such as high humidity and salt spray, the electrical system of the equipment can still remain stable, avoiding failures or shutdowns caused by corrosion or moisture. Through a series of corrosion, moisture, and rust protection measures, the engine can significantly reduce failures and damage caused by environmental factors during long-term use on islands, reducing maintenance frequency and repair costs, and improving overall economic efficiency.

[0055] Through this structural design, by setting the engine module 1, heat exchange module 2, exhaust module 3, and seawater desalination module 4, the waste heat of the generator set is fully utilized, saving energy. Through a series of corrosion, moisture, and rust protection measures, the engine can significantly reduce failures and damage caused by environmental factors during long-term use on islands. Example 2

[0056] This embodiment provides a diesel generator set for islands, which has the following technical features in addition to the technical solutions of the above-mentioned embodiments.

[0057] Further, the smoke exhaust module 3 comprises:

[0058] A smoke exhaust pipe 5 having a smoke outlet and a smoke inlet;

[0059] A heat exchange pipe 6 spirally arranged in the smoke exhaust pipe 5, the heat exchange pipe 6 having a liquid inlet and a liquid outlet at two ends respectively, the two ends of the heat exchange pipe 6 extending out of the smoke exhaust pipe 5;

[0060] A spiral plate 7 fixedly arranged in the smoke exhaust pipe 5, the spiral plate 7 spirally arranged in the smoke exhaust pipe 5, the spiral plate 7 and the pipe of the smoke exhaust pipe 5 forming a spiral smoke passage, the heat exchange pipe 6 being located in the smoke passage;

[0061] Wherein, the smoke inlet of the smoke exhaust pipe 5 is connected with the smoke exhaust port of the engine module 1 through a pipe, the liquid inlet of the heat exchange pipe 6 is connected with the shell outlet of the heat exchange module 2 through a pipe, and the liquid outlet of the heat exchange pipe 6 is connected with the seawater inlet of the seawater desalination module 4 through a pipe.

[0062] In the technical solution, the seawater output by the heat exchange module 2 enters the liquid inlet of the heat exchange pipe 6 through a pipe, the smoke generated by the engine module 1 enters the smoke inlet of the smoke exhaust pipe 5 through a pipe, and the spiral plate 7 and the pipe of the smoke exhaust pipe 5 form a spiral smoke passage, so that the smoke generated by the engine module 1 can enter the spiral flue, and at the same time, since the heat exchange pipe 6 is located in the smoke passage, the seawater in the heat exchange pipe 6 can be heat exchanged while the smoke rises in the spiral flue, and the cooperation of the spiral flue and the spiral heat exchange pipe 6 greatly increases the heat exchange area, so that the heat exchange effect between the smoke and the water is better, and the heat energy of the smoke is fully absorbed.

[0063] Through the structure design, the spiral heat exchange pipe 6 and the spiral plate 7 are arranged, the cooperation of the spiral flue and the spiral heat exchange pipe 6 greatly increases the heat exchange area, so that the heat exchange effect between the smoke and the water is better, and the heat energy of the smoke is fully absorbed. Embodiment 3

[0064] The embodiment provides a diesel generator set for islands, in addition to the technical solutions of the above embodiments, further comprising the following technical features.

[0065] Further, the smoke exhaust pipe 5 comprises a shell A 8 and a shell B 9, a plurality of semicircular spiral plates 10 are fixedly arranged in the shell A 8 and the shell B 9, the shell A 8 and the shell B 9 are detachably connected, and the semicircular spiral plates 10 in the shell A 8 and the semicircular spiral plates 10 in the shell B 9 form the spiral plate 7 after the shell A 8 and the shell B 9 are fixedly connected.

[0066] The several semi-circular spiral pieces 10 in the shell A8 or the shell B9 are arranged at intervals, and each circle of the heat exchange pipe 6 is located in one interval.

[0067] Through the structural design, by dividing the smoke exhaust pipe 5 into the detachable shell A8 and the shell B9, the heat exchange pipe 6 is more convenient to install, and the several semi-circular spiral pieces 10 can also play a positioning role on the heat exchange pipe 6 during installation of the heat exchange pipe 6, so as to avoid sliding of the heat exchange pipe 6. The detachable smoke exhaust pipe 5 is also convenient for cleaning the inside of the smoke exhaust pipe 5 or maintaining the heat exchange pipe 6. Embodiment 4

[0068] The diesel generator set for islands provided in the embodiment further has the following technical features in addition to the technical solutions in the above embodiments.

[0069] Further, it further comprises:

[0070] The temperature sensor 11 is arranged on the pipeline at the liquid outlet and the liquid inlet of the heat exchange pipe 6.

[0071] Through the structural design, by arranging the temperature sensor 11 on the pipeline at the liquid outlet and the liquid inlet of the heat exchange pipe 6, the seawater temperature at both ends of the heat exchange pipe 6 can be detected by the temperature sensor 11, so as to control and debug the water flow and flow rate in the heat exchange pipe 6 according to the temperature change, so as to achieve the best heat exchange effect. Embodiment 5

[0072] The diesel generator set for islands provided in the embodiment further has the following technical features in addition to the technical solutions in the above embodiments.

[0073] Further, it further comprises:

[0074] The three-way pipeline 12 is fixedly connected with the flue gas inlet of the smoke exhaust pipe 5 at one end, connected with the flue gas outlet of the engine module 1 through the pipeline at the second end, and fixedly connected with the exhaust valve 13 at the third end.

[0075] The air pressure sensor 14 is arranged on the three-way pipeline 12 and used for detecting the air pressure in the pipeline.

[0076] In the technical solution, the air pressure sensor 14 can detect the air pressure at the flue gas inlet of the smoke exhaust pipe 5. When the smoke exhaust pipe 5 discharges more gas in a period of time, so that the air pressure at the flue gas inlet of the smoke exhaust pipe 5 is too large to affect the smoke exhaust effect, the air pressure sensor 14 can transmit a signal to the controller, and the controller sends a signal to the exhaust valve 13, so that the exhaust valve 13 is opened to release pressure, thereby avoiding affecting the working effect of the engine module 1.

[0077] Through the structural design, the gas pressure at the smoke gas inlet of the smoke exhaust pipe 5 is detected through the setting of the three-way pipe 12, the exhaust valve 13 and the gas pressure sensor 14, so that the exhaust valve 13 is driven to open for pressure relief when the gas pressure is too large, thereby avoiding affecting the smoke exhaust effect of the engine module 1 and ensuring the normal work of the overall unit. Example 6

[0078] The embodiment provides a diesel generator set for islands, in addition to comprising the technical scheme of the above embodiment, further has the following technical features.

[0079] Further, it further comprises:

[0080] The smoke exhaust bypass pipe 15 is a three-way pipe, the first end of the smoke exhaust bypass pipe 15 is fixedly connected with the gas outlet of the exhaust valve 13;

[0081] The section of the pipe between the liquid inlet of the heat exchange pipe 6 and the shell side outlet of the heat exchange module 2 passes through the second end and the third end of the smoke exhaust bypass pipe 15.

[0082] In the technical scheme, the smoke gas exhausted by the exhaust valve 13 when pressure relief enters the smoke exhaust bypass pipe 15, and since the smoke exhaust bypass pipe 15 is a three-way pipe, and the first end pipe of the smoke exhaust bypass pipe 15 is throughly arranged with the second end pipe and the third end pipe, the smoke gas entering the first end of the smoke exhaust bypass pipe 15 enters the second end pipe and the third end pipe of the smoke exhaust bypass pipe 15, and since the section of the pipe between the liquid inlet of the heat exchange pipe 6 and the shell side outlet of the heat exchange module 2 passes through the second end and the third end of the smoke exhaust bypass pipe 15, the smoke gas exhausted by the exhaust valve 13 when pressure relief can have a certain heat exchange effect on the seawater in the section of the pipe between the liquid inlet of the heat exchange pipe 6 and the shell side outlet of the heat exchange module 2, thereby avoiding heat energy waste and making the overall heat exchange effect better.

[0083] Through the structural design, the smoke gas exhausted by the exhaust valve 13 when pressure relief can have a certain heat exchange effect on the seawater in the section of the pipe between the liquid inlet of the heat exchange pipe 6 and the shell side outlet of the heat exchange module 2 through the setting of the smoke exhaust bypass pipe 15, thereby avoiding heat energy waste and making the overall heat exchange effect better. Example 7

[0084] The embodiment provides a diesel generator set for islands, in addition to comprising the technical scheme of the above embodiment, further has the following technical features.

[0085] Further, the smoke exhaust side pipe 15 has a second end and a section of pipe with a third end, which includes an upper cover 16 and a lower cover 17, the upper cover 16 and the lower cover 17 are detachably connected, after the upper cover 16 and the lower cover 17 are fixedly connected, the second end and the third end of the smoke exhaust side pipe 15 will cover a section of pipe between the liquid inlet of the heat exchange pipe 6 and the shell side outlet of the heat exchange module 2, a plurality of smoke outlets 18 are formed in the upper cover 16.

[0086] In the technical solution, the section of pipe with the second end and the third end of the smoke exhaust side pipe 15 is divided into the upper cover 16 and the lower cover 17, which are detachably connected, facilitating the installation of the section of pipe between the liquid inlet of the heat exchange pipe 6 and the shell side outlet of the heat exchange module 2, and after the upper cover 16 and the lower cover 17 are installed, the second end and the third end of the smoke exhaust side pipe 15 are blocked, so that the second end and the third end of the smoke exhaust side pipe 15 cover the section of pipe between the liquid inlet of the heat exchange pipe 6 and the shell side outlet of the heat exchange module 2, so that the heat exchange effect is better, and the flue gas after heat exchange is discharged from the smoke outlets 18 on the top of the upper cover 16.

[0087] Through the structure design, the section of pipe with the second end and the third end of the smoke exhaust side pipe 15 is divided into the upper cover 16 and the lower cover 17, which facilitates the installation of the section of pipe between the liquid inlet of the heat exchange pipe 6 and the shell side outlet of the heat exchange module 2, and the second end and the third end of the smoke exhaust side pipe 15 cover the section of pipe between the liquid inlet of the heat exchange pipe 6 and the shell side outlet of the heat exchange module 2, so that the heat exchange effect is better, and the flue gas after heat exchange is discharged from the smoke outlets 18 on the top of the upper cover 16.

[0088] The embodiments of the application are described above in combination with the drawings, and the embodiments and the features in the embodiments in the specification can be combined with each other without conflict, the application is not limited to the above specific embodiments, the above specific embodiments are only illustrative, not restrictive, and those skilled in the art can make many forms under the inspiration of the application without departing from the purpose of the application and the scope protected by the claims, which all belong to the protection of the application.

Claims

1. A diesel generator set for use on islands, characterized in that, Also includes: Engine module (1), which is used to generate electricity via diesel; The heat exchange module (2) is used to exchange heat and cool the hot water output from the cooling water circuit of the engine module (1); The exhaust module (3) is used to exhaust the exhaust gas generated by the engine module (1) and to heat the shell-side fluid output by the heat exchange module (2); Seawater desalination module (4), which is used to desalinate seawater; The engine module (1) has a water outlet, a water inlet, and a flue gas outlet; the heat exchange module (2) has a tube-side inlet, a tube-side outlet, a shell-side inlet, and a shell-side outlet; the flue gas module (3) has a fluid inlet, a fluid outlet, a flue gas inlet, and a flue gas outlet; the seawater desalination module (4) has a seawater inlet; the water outlet of the engine module (1) is connected to the tube-side inlet of the heat exchange module (2) via a pipe; the water inlet of the engine module (1) is connected to the tube-side outlet of the heat exchange module (2) via a pipe; the shell-side outlet of the heat exchange module (2) is connected to the fluid inlet of the flue gas module (3) via a pipe; the fluid outlet of the flue gas module (3) is connected to the seawater inlet of the seawater desalination module (4) via a pipe; and the flue gas outlet of the engine module (1) is connected to the flue gas inlet of the flue gas module (3) via a pipe.

2. The diesel generator set for island use according to claim 1, characterized in that, The smoke extraction module (3) includes: The exhaust pipe (5) has a flue gas outlet and a flue gas inlet; The heat exchange tube (6) is spirally arranged inside the flue pipe (5). The heat exchange tube (6) has an inlet and an outlet at both ends, and both ends of the heat exchange tube (6) extend out of the outside of the flue pipe (5). Spiral plate (7), a spiral plate (7) is also fixedly installed inside the flue pipe (5). The spiral plate (7) is spirally installed inside the flue pipe (5). The spiral plate (7) and the flue pipe (5) form a spiral flue gas channel. The heat exchange tube (6) is located inside the flue gas channel. The flue gas inlet of the exhaust pipe (5) is connected to the exhaust port of the engine module (1) through a pipe, the liquid inlet of the heat exchange pipe (6) is connected to the shell-side outlet of the heat exchange module (2) through a pipe, and the liquid outlet of the heat exchange pipe (6) is connected to the seawater inlet of the seawater desalination module (4) through a pipe.

3. A diesel generator set for island use according to claim 2, characterized in that: The exhaust pipe (5) includes a housing A (8) and a housing B (9). Several semi-circular spiral blades (10) are fixedly installed inside the housing A (8) and the housing B (9). The housing A (8) and the housing B (9) are detachably connected. After the housing A (8) and the housing B (9) are fixedly connected, the semi-circular spiral blades (10) inside the housing A (8) and the semi-circular spiral blades (10) inside the housing B (9) form a spiral plate (7).

4. A diesel generator set for island use according to claim 3, characterized in that, Also includes: Temperature sensor (11): Temperature sensor (11) is installed on the pipes at the outlet and inlet of the heat exchange tube (6).

5. A diesel generator set for island use according to claim 4, characterized in that, Also includes: The three-way pipe (12) has one end fixedly connected to the flue gas inlet of the exhaust pipe (5), the second end of which is connected to the exhaust port of the engine module (1) through a pipe, and the third end of which is fixedly connected to an exhaust valve (13). A pressure sensor (14) is installed on a three-way pipe (12) to detect the pressure inside the pipe.

6. A diesel generator set for island use according to claim 5, characterized in that, Also includes: The exhaust bypass pipe (15) is a three-way pipe, and the first end of the exhaust bypass pipe (15) is fixedly connected to the outlet of the exhaust valve (13); Among them, a section of pipe between the liquid inlet of the heat exchange tube (6) and the shell-side outlet of the heat exchange module (2) passes through the second and third ends of the flue gas bypass pipe (15).

7. A diesel generator set for island use according to claim 6, characterized in that: The exhaust bypass pipe (15) has a second end and a third end, including an upper cover (16) and a lower cover (17). The upper cover (16) and the lower cover (17) are detachably connected. After the upper cover (16) and the lower cover (17) are fixedly connected, the second end and the third end of the exhaust bypass pipe (15) cover a section of pipe between the liquid inlet of the heat exchange tube (6) and the shell outlet of the heat exchange module (2). The upper cover (16) has several smoke outlets (18).

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