A ship onshore joint debugging test fuel supply recovery system and method

Abstract

The application discloses a kind of ship land joint debugging test fuel supply recovery system, including daily fuel tank, electric fuel booster pump group, steam heater and at least one main boiler;The fuel daily outlet of the daily fuel tank is communicated with the fuel inlet of electric fuel booster pump group by pipeline;The fuel outlet of the electric fuel booster pump group is communicated with the cold source inlet of steam heater by pipeline, and the cold source outlet of steam heater is communicated with the fuel inlet of each main boiler by pipeline.The application also provides a kind of fuel supply method and fuel recovery method.The beneficial effects of the present application are: the application uses electric fuel booster pump group to meet the fuel supply demand of boiler, compared with the prior art steam-driven fuel pump technology, without configuring steam pipeline, exhaust pipe and various supporting valves and other equipment, not only simplifies the system, but also avoids various security risks caused by steam leakage, improves the safety and economy of the whole system.

Description

TECHNICAL FIELD

[0001] The present application relates to a test fuel system, in particular to a ship onshore joint debugging test fuel supply recovery system and method. BACKGROUND

[0002] The ship onshore joint debugging test is an important link in the shipbuilding process, the main purpose is to check whether various equipment and systems on the ship can normally operate according to the design requirements, to ensure the coordination and compatibility between the systems, such as the power system, the power system, the communication system, the navigation system and the like of the ship; and to test various performance indicators of the ship, to troubleshoot and repair the faults and problems existing in the ship equipment and system, to avoid the occurrence of faults after the ship is launched to affect the normal navigation and safety of the ship. The fuel supply system is one of the key links in the ship onshore joint debugging test.

[0003] The fuel oil required by the main power device fuel oil boiler of the steam power of the ship is constantly changing with the working condition. The fuel oil system is used to provide fuel oil meeting the pressure, flow and temperature requirements to the main boiler. The existing technology is equipped with a steam-driven fuel oil pump to achieve this. However, a corresponding steam source, steam pipeline and exhaust pipeline and the like need to be configured, which not only has a complex system, high cost, but also has the risk of high-temperature and high-pressure steam leakage, and the safety of the whole system is low; at the same time, the original daily fuel oil system has many leakage points, and there is no fuel oil recovery measure, which not only pollutes the engine room environment but also has a great safety risk. In addition, since the onshore joint debugging test site is only equipped with two main boilers, there is no auxiliary steam source, the fuel oil cannot be heated, and the first boiler cannot be started in cold state. SUMMARY

[0004] The purpose of the present application is to provide a ship onshore joint debugging test fuel supply recovery system and method to improve the safety of the system in view of the deficiencies of the prior art.

[0005] The technical scheme adopted by the present application is: a ship onshore joint debugging test fuel supply recovery system, comprising a daily fuel oil tank, an electric fuel booster pump group, a steam heater and at least one main boiler;

[0006] The fuel daily outlet of the daily fuel oil tank is communicated with the fuel inlet of the electric fuel booster pump group through a pipeline;

[0007] The fuel outlet of the electric fuel booster pump group is communicated with the cold source inlet of the steam heater through a pipeline, and the cold source outlet of the steam heater is communicated with the fuel inlet of each main boiler through a pipeline.

[0008] According to the above scheme, a fuel electric heater is arranged on the communication pipeline between the cold source outlet of the steam heater and the fuel inlet of one of the main boilers, and temperature sensors are arranged in the interior, inlet and outlet of the fuel electric heater respectively.

[0009] According to the above scheme, the system is also provided with an oil collecting assembly; the electric fuel booster pump group is provided with an oil containing part, the fuel electric heater and each main boiler are respectively provided with a clean leaked oil outlet, the oil containing part and each clean leaked oil outlet are respectively communicated with the inlet of the oil collecting assembly, the outlet of the oil collecting assembly is communicated with the main fuel tank, and the oil containing part is provided with a liquid level sensor.

[0010] According to the above scheme, a cold oil filter is arranged on the communication pipeline between the fuel outlet of the electric booster pump group and the cold source inlet of the steam heater.

[0011] According to the above scheme, the outlet of the steam heater is connected with the hot oil filter through a pipeline, the outlet of the hot oil filter is communicated with the fuel inlet of the corresponding main boiler through each branch pipeline, the fuel electric heater arranged on the first main boiler is arranged on the corresponding branch pipeline, and the heat source channel of the steam heater is communicated with one of the main boilers.

[0012] According to the above scheme, the system is also provided with a dirty oil well; the cold oil filter, the hot oil filter and the steam heater are respectively provided with a dirty oil port, and each dirty oil port is communicated with the dirty oil well through a pipeline.

[0013] According to the above scheme, the daily fuel tank is provided with a high liquid level sensor and a low liquid level sensor.

[0014] According to the above scheme, the electric fuel booster pump group comprises a commonly used electric fuel booster pump corresponding to the number of main boilers and at least one standby electric fuel booster pump.

[0015] The application also adopts a fuel supply method based on the above-mentioned system, and the method is as follows:

[0016] According to the maximum flow and pressure requirement of the main boiler fuel, the power of the electric fuel booster pump is adjusted, the fuel in the daily fuel tank is sent to the main boiler for fuel supply, according to the temperature requirement of the fuel of the first main boiler, the power of the fuel electric heater is adjusted, the fuel is heated to the set outlet temperature, and then the fuel with appropriate temperature is provided for the first main boiler, the first main boiler is ignited and started, steam is generated and sent to the steam heater to provide heat source for the steam heater, the electric fuel booster pump group sucks the fuel in the daily fuel tank, the fuel is coarsely filtered through the cold oil filter, heated through the steam heater and finely filtered through the hot oil filter, and then the fuel is transported to the remaining main boilers after reaching the set temperature and flow requirement, and the remaining main boilers are ignited and started to burn.

[0017] The application also adopts a fuel recovery method based on the above-mentioned system, and the method is as follows: when the liquid level sensor in the oil containing part of the electric fuel booster pump group detects that the fuel amount in the oil containing part reaches the set maximum liquid level, the valve on the corresponding pipeline is opened, and the fuel in the oil containing part is sent to the inlet of the oil collecting assembly.

[0018] The leaked fuel oil of the fuel oil electric heater and each main boiler is respectively sent to the inlet of the oil collecting assembly through the corresponding clean leaked oil outlet and pipeline;

[0019] When the high liquid level sensor in the oil collecting assembly detects that the amount of fuel oil in the oil collecting assembly reaches the maximum liquid level, the valve on the corresponding pipeline is opened, and the fuel oil in the oil collecting assembly is sent to the daily fuel oil cabin for reuse.

[0020] The beneficial effects of the present application are:

[0021] (1) The electric fuel booster pump group adopted by the present application meets the fuel supply requirements of the boiler. Compared with the steam-driven fuel pump technology in the prior art, the present application does not need to configure steam pipelines, exhaust pipelines and various supporting valves and other equipment, which not only simplifies the system, but also avoids various safety hazards caused by steam leakage, thereby improving the safety and economy of the entire system.

[0022] (2) The present application designs a fuel oil electric heater, which heats the fuel oil of the first main boiler, so that the first main boiler can be started normally, thereby solving the problem of cold-state starting of the main boiler without auxiliary steam in the prior art.

[0023] (3) The present application additionally provides an oil collecting assembly for collecting and recycling the leaked fuel oil of each device, thereby improving the safety and reliability of the system and reducing the test cost.

[0024] (4) The electric fuel booster pump group designed in the present application is configured with a standby electric fuel booster pump, which ensures the normal operation of the system.

[0025] (5) The present application not only can provide fuel oil meeting the pressure, flow and temperature requirements to the main boiler, but also can solve the problems of cold-state starting of the first boiler and fuel oil recycling, and improve the reliability, safety and economy of the fuel oil system. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic diagram of one specific embodiment of the present application.

[0027] Wherein: 01, daily fuel tank; 02, electric fuel booster pump; 03, cold oil filter; 04, steam heater; 05, hot oil filter; 06, oil collecting assembly; 07, fuel electric heater; 08, first main boiler; 09, second main boiler; 010, dirty oil well; 1, fuel backup outlet of daily fuel tank; 2, daily fuel outlet of daily fuel tank; 3, oil return inlet of daily fuel tank; 4, fuel inlet of electric fuel booster pump; 5, clean leakage oil outlet of electric fuel booster pump; 6, fuel outlet of electric fuel booster pump; 7, fuel inlet of cold oil filter; 8, fuel outlet of cold oil filter; 9, fuel inlet of steam heater; 10, fuel outlet of steam heater; 11, dirty oil outlet of steam heater; 12, fuel inlet of hot oil filter; 13, fuel outlet of hot oil filter; 14, dirty oil outlet of hot oil filter; 15, dirty oil inlet of dirty oil well; 16, clean leakage oil outlet of fuel electric heater; 17, fuel inlet of fuel electric heater; 18, fuel outlet of fuel electric heater; 19, fuel inlet of first main boiler; 20, fuel inlet of second main boiler; 21, oil return outlet of second main boiler; 22, clean leakage oil outlet of second main boiler; 23, clean leakage oil outlet of first main boiler; 24, oil return outlet of first main boiler; 25, clean leakage oil inlet of oil collecting assembly; 26, clean leakage oil inlet of oil collecting assembly; 27, clean leakage oil inlet of oil collecting assembly; 28, oil return inlet of oil collecting assembly; 29, oil return outlet of oil collecting assembly; 30, dirty oil outlet of cold oil filter. DETAILED DESCRIPTION

[0028] In order to better understand the present application, the present application is further described below in conjunction with the accompanying drawings and specific embodiments. As shown in the drawings: Figure 1 It is a kind of ship onshore debugging test fuel supply recovery system, including daily fuel tank 01, electric fuel booster pump group, steam heater 04 and at least one main boiler;

[0029] The daily fuel tank 01 is located on land, and the daily fuel outlet of the daily fuel tank 01 is communicated with the fuel inlet of the electric fuel booster pump group through pipeline;

[0030] The fuel outlet of the electric fuel booster pump group is communicated with the cold source inlet of the steam heater 04 through pipeline, and the cold source outlet of the steam heater 04 is communicated with the fuel inlet of each main boiler through pipeline;

[0031] The main boiler is located on the ship.

[0032] In the present application, the daily fuel tank 01 is provided with a high liquid level sensor and a low liquid level sensor for detecting the oil level height.

[0033] In the application, the electric fuel booster pump group comprises commonly used electric fuel booster pumps 02 corresponding to the number of main boilers and at least one standby electric fuel booster pump 02.

[0034] Preferably, a fuel electric heater 07 is arranged on the communication pipeline between the steam heater 04 cold source outlet and the fuel inlet of one of the main boilers.

[0035] In the application, temperature sensors are arranged in the fuel electric heater 07, the inlet and the outlet, respectively, so that power adjustment and automatic start-stop control can be realized according to the fuel outlet temperature. The design flow and heating power of the electric fuel heater only meet the fuel flow and temperature requirements for the cold start of a single boiler.

[0036] In the application, the fuel electric heater 07 is used to heat the fuel entering the main boiler, which is started first, i.e., the first main boiler.

[0037] Preferably, a cold oil filter 03 is arranged on the communication pipeline between the electric booster pump group fuel outlet and the steam heater 04 cold source inlet; the steam heater 04 cold source outlet is connected to a hot oil filter 05 through a pipeline, and the outlet of the hot oil filter 05 is connected to the fuel inlets of the corresponding main boilers through branch pipelines; the fuel electric heater 07 arranged on the first main boiler is arranged on the corresponding branch pipeline; the steam source channel of the steam heater 04 is connected to one of the main boilers, and the steam used for heating is supplied by the main boiler.

[0038] In the application, the cold oil filter 03 and the hot oil filter 05 filter the fuel before and after being heated by the steam heater. The outlet of the daily fuel tank 01 can also be directly connected to the inlet of the cold oil filter 03.

[0039] Preferably, the system further comprises an oil collecting assembly 06; the electric fuel booster pump group is provided with an oil containing part, the fuel electric heater 07 and each main boiler are respectively provided with a clean leaked oil outlet, the oil containing part and each clean leaked oil outlet are respectively connected to the inlet of the oil collecting assembly 06, and the outlet of the oil collecting assembly 06 is connected to the main fuel tank; a liquid level sensor is arranged in the oil containing part.

[0040] In the application, the oil collecting assembly 06 is used to collect the leaked fuel of the electric fuel booster pump group, the fuel electric heater and each main boiler, and send the fuel to the main fuel tank for reuse.

[0041] Preferably, the system further comprises a dirty oil well 010; the cold oil filter 03, the hot oil filter 05 and the steam heater 04 are respectively provided with a dirty oil port, and each dirty oil port is connected to the dirty oil well 010 through a dirty oil pipeline.

[0042] In the present application, the leaked dirty oil of the cold oil filter 03, the steam heater 04 and the hot oil filter 05 is directly discharged into the dirty oil well 010.

[0043] In the present application, a valve is arranged on each communication pipeline.

[0044] A ship onshore joint debugging test fuel supply method, the method is:

[0045] According to the maximum flow and pressure requirement of the main boiler fuel, the power of the electric fuel booster pump 02 is adjusted to send the fuel in the daily fuel tank 01 to the main boiler for fuel supply; then according to the temperature requirement of the first main boiler fuel, the power of the fuel electric heater 07 is adjusted to heat the fuel to the set outlet temperature, and then provide fuel with appropriate temperature to the first main boiler; the first main boiler is ignited and started, and after steam is generated, it is sent to the steam heater 04 to provide heat source for the steam heater 04, the electric fuel booster pump group sucks the fuel in the daily fuel tank, and after being coarsely filtered by the cold oil filter 03, heated by the steam heater 04 and finely filtered by the hot oil filter 05, the fuel reaches the set temperature and flow requirement, and then is delivered to the remaining main boilers, and the remaining main boilers are ignited and started and burned.

[0046] A ship onshore joint debugging test fuel recovery method, the method is:

[0047] When the liquid level sensor in the oil containing part of the electric fuel booster pump group detects that the fuel amount in the oil containing part reaches the set maximum liquid level, the valve on the corresponding pipeline is opened, and the fuel in the oil containing part is sent to the inlet of the oil collecting assembly 06; the leaked fuel of the fuel electric heater 07 and each main boiler is sent to the inlet of the oil collecting assembly 06 through the corresponding clean leaked oil outlet and pipeline;

[0048] When the high liquid level sensor in the oil collecting assembly 06 detects that the fuel amount in the oil collecting assembly 06 reaches the maximum liquid level, the valve on the corresponding pipeline is opened, and the fuel in the oil collecting assembly 06 is sent to the daily fuel tank 01 for reuse.

[0049] Embodiment

[0050] As Figure 1 shown in a ship onshore joint debugging test fuel supply recovery system, including a daily fuel tank 01 (part number 1), an electric fuel booster pump 02 (part number 2), a cold oil filter 03 (part number 3), a steam heater 04 (part number 4), a hot oil filter 05 (part number 5), an oil collecting assembly 06 (part number 6), a fuel electric heater 07 (part number 7), a first main boiler 08 (part number 8, that is, the first started main boiler), a second main boiler 09 (part number 9), a dirty oil well 010 (part number 10), various control valves and pipelines. Among them:

[0051] The daily fuel tank 01 is used for storing fuel, and the volume is 50m3 The system can run for about 10 hours, and high and low liquid level sensors are configured to automatically supply fuel according to the level of the liquid. The daily fuel tank 01 is configured with a daily fuel outlet 2, a backup fuel outlet 1 and a fuel return inlet 3.

[0052] The electric fuel booster pump set includes two commonly used electric fuel booster pumps 02 and one standby electric fuel booster pump 02. A single electric fuel booster pump 02 can meet the maximum flow and pressure requirements of one main boiler. The two commonly used electric fuel booster pumps 02 are respectively configured with a fuel inlet 4 and a fuel outlet 5. The fuel inlet 4 of the electric fuel booster pump 02 is connected to the daily fuel outlet 2 of the daily fuel tank 01 through a pipeline. The configuration scheme of 2 for 1 backup is adopted to form the fuel booster pump set. An oil collection tray (i.e. an oil collection member) is arranged below the pump set for collecting leaked fuel. The oil collection tray is provided with a clean leaked oil outlet 5 which is connected to the clean leaked oil inlet 27 of the oil collection assembly 06.

[0053] One cold oil filter 03 and one hot oil filter 05 are respectively arranged to filter the cold oil and hot oil entering and exiting the fuel vapor heater 04, so as to ensure that the fuel quality meets the needs of the boiler. The cold oil filter 03 is provided with a fuel inlet 7, a fuel inlet 8 and a dirty oil port 30. The fuel inlet 7 of the cold oil filter 03 is respectively connected to the fuel outlet 6 of the electric fuel booster pump set and the backup fuel outlet 1 of the daily fuel tank 011 through a pipeline. The fuel outlet 8 of the cold oil filter 03 is connected to the fuel inlet 9 (i.e. the cold source inlet) of the vapor heater 044 through a pipeline. The hot oil filter 05 is provided with a fuel inlet 12, a fuel outlet 13 and a dirty oil port 14. The fuel inlet 12 of the hot oil filter 05 is connected to the fuel outlet 10 (i.e. the cold source outlet) of the vapor heater 04. The fuel outlet 13 of the hot oil filter 05 is respectively connected to the branch pipeline of each main boiler. The dirty oil port 30 of the cold oil filter 03 and the dirty oil port 14 of the hot oil filter 05 are respectively connected to the dirty oil inlet 15 of the dirty oil well 010.

[0054] The steam heater 04 and the fuel oil electric heater 07 are each configured one. The design flow of the steam heater 04 can meet the maximum flow and pressure requirements of two boilers at the same time. The design flow and heating power of the electric fuel oil heater only need to meet the fuel oil flow and temperature requirements of a single boiler cold start. Temperature sensors are arranged inside, at the inlet and outlet of each heater, and power regulation and automatic start-stop control can be realized according to the fuel oil outlet temperature. The steam heater 04 is provided with a fuel oil inlet 9, a fuel oil outlet 10 and a dirty oil port 11, and the dirty oil port 11 of the steam heater 04 is in communication with the dirty oil inlet 15 of the dirty oil well 010. The fuel oil electric heater 07 is provided with a fuel oil inlet 17, a fuel oil outlet 18 and a clean leakage oil outlet 16, and the fuel oil electric heater 07 is arranged on the branch pipeline. The fuel oil inlet 17 of the fuel oil electric heater 07 is in communication with the fuel oil outlet 13 of the hot oil filter 05; the fuel oil outlet 18 of the fuel oil electric heater 07 is in communication with the fuel oil inlet 19 of the first main boiler 08 (i.e. the first main boiler); and the clean leakage oil outlet 16 of the fuel oil electric heater 07 is in communication with the clean leakage oil inlet 16 of the oil collecting assembly 06.

[0055] The oil collecting assembly 06 is used to collect and recover the clean leakage oil and return oil of the electric fuel oil booster pump set, the fuel oil electric heater 07 and the main boiler, and after treatment, the oil is transported back to the daily fuel oil cabin 01. The oil collecting assembly 06 is provided with clean leakage oil inlets 25, 26 and 27, a return oil inlet 28 and a return oil outlet 29, and the return oil inlets 28 of the oil collecting assembly 06 are respectively in communication with the return oil outlets 24 of the first main boiler 08 and the return oil outlets 21 of the second main boiler 09. In the embodiment, the oil collecting assembly 06 can be a well.

[0056] The first main boiler 08, i.e. the first started main boiler, has a cold start function, while the second main boiler 09 does not have a cold start function. In the cold start working condition, the electric fuel oil booster pump set sucks the fuel oil in the daily fuel oil cabin for oil mixing, and starts the fuel oil electric heater 07 to heat the fuel oil by using electric energy. When the fuel oil temperature and pressure meet the starting requirements, the first main boiler 08 is ignited. After the first main boiler 08 is started, auxiliary steam can be output to ensure normal operation of the system. After the cold start of the first main boiler 08, the fuel oil in the daily fuel oil cabin is sucked by the electric fuel oil booster pump set, filtered by the cold oil filter 03, heated by the steam heater 04, and filtered by the hot oil filter 05, and then delivered to the main boiler for combustion. The first main boiler 08 is provided with a fuel oil inlet 19, a clean leakage oil outlet 23 and a return oil port 24; the second main boiler 09 is provided with a fuel oil inlet 20, a clean leakage oil outlet 22 and a return oil port 21, and the fuel oil inlet 20 of the second main boiler 09 is in communication with the fuel oil outlet 13 of the hot oil boiler; and the clean leakage oil outlet 23 of the first main boiler 08 and the clean leakage oil outlet 22 of the second main boiler 09 are respectively in communication with the clean leakage oil inlet 25 of the oil collecting assembly 06.

[0057] The contents not described in the specification are the prior art known to those skilled in the art.

[0058] Finally, it should be noted that the above is only the preferred embodiments of the present application, and is not intended to limit the present application, although the present application is described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, but any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A fuel supply and recovery system for ship onshore joint commissioning test, characterized in that: Includes daily fuel oil tanks, electric fuel oil booster pump sets, steam heaters and at least one main boiler; The daily fuel outlet of the daily fuel tank is connected to the fuel inlet of the electric fuel booster pump unit through a pipeline; The fuel outlet of the electric fuel boost pump group is connected to the cold source inlet of the steam heater through a pipeline, and the cold source outlet of the steam heater is connected to the fuel inlet of each main boiler through a pipeline; An electric fuel heater is installed on the connecting pipe between the cold source outlet of the steam heater and the fuel inlet of one of the main boilers. Temperature sensors are installed inside, at the inlet and at the outlet of the electric fuel heater. The system is also provided with an oil collecting assembly; the electric fuel booster pump group is provided with an oil container; the fuel electric heater and each main boiler are respectively provided with a clean leakage oil outlet; the oil container and each clean leakage oil outlet are respectively connected to the inlet of the oil collecting assembly, and the outlet of the oil collecting assembly is connected to the main fuel tank; a liquid level sensor is provided in the oil container.

2. The fuel supply and recovery system for ship onshore joint commissioning test according to claim 1, characterized in that: A cold oil filter is provided on the connecting pipeline between the fuel outlet of the electric booster pump group and the cold source inlet of the steam heater.

3. The fuel supply and recovery system for ship onshore joint commissioning test according to claim 2 is characterized in that: The cold source outlet of the steam heater is connected to the hot oil filter through a pipeline, and the outlet of the hot oil filter is connected to the corresponding main boiler fuel inlet through each branch pipeline; the fuel electric heater configured for the first main boiler is installed on the corresponding branch pipeline; the heat source channel of the steam heater is connected to one of the main boilers.

4. The fuel supply and recovery system for ship onshore joint commissioning test according to claim 3 is characterized in that: The system is further provided with a dirty oil well; the cold oil filter, hot oil filter and steam heater are respectively provided with a dirty oil port, and each dirty oil port is connected to the dirty oil well through a pipeline.

5. The fuel supply and recovery system for ship onshore joint commissioning test according to claim 1 is characterized in that: A high liquid level sensor and a low liquid level sensor are provided in the daily fuel tank.

6. The fuel supply and recovery system for ship onshore joint commissioning test according to claim 1 is characterized in that: The electric fuel booster pump group includes common electric fuel booster pumps corresponding to the number of main boilers and at least one spare electric fuel booster pump.

7. A fuel supply method based on the fuel supply and recovery system for ship land joint commissioning test according to claim 1, characterized in that: The method is: According to the maximum flow rate and pressure requirements of the main boiler fuel, the power of the electric fuel booster pump is adjusted to deliver the fuel in the daily fuel tank to the main boiler for oil supply. Then, according to the temperature requirement of the first main boiler fuel, the power of the fuel electric heater is adjusted to heat the fuel to the set outlet temperature, and then provide fuel of the appropriate temperature to the first main boiler. The first main boiler is ignited and started, and the steam generated is sent to the steam heater to provide a heat source for the steam heater. The electric fuel booster pump group draws the fuel from the daily fuel tank, and after coarse filtration through the cold oil filter, heating by the steam heater, and fine filtration through the hot oil filter, after reaching the set temperature and flow requirements, it is delivered to the remaining main boilers, and the remaining main boilers are ignited and started for combustion.

8. A fuel oil recovery method based on the fuel oil supply and recovery system for ship onshore joint commissioning test according to claim 1, characterized in that: The method is: When the liquid level sensor in the oil container of the electric fuel booster pump unit detects that the amount of fuel in the oil container has reached the set maximum level, the valve on the corresponding pipeline is opened, and the fuel in the oil container is sent to the inlet of the oil collection assembly; The leaked fuel oil from the fuel electric heater and each main boiler is respectively sent to the inlet of the oil collection assembly through the corresponding clean leaked oil outlet and pipeline; When the high liquid level sensor in the oil collecting assembly detects that the amount of fuel in the oil collecting assembly has reached the maximum liquid level, the valve on the corresponding pipeline is opened and the fuel in the oil collecting assembly is sent to the daily fuel tank for reuse.

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