Ship power station cooling system with standby auxiliary heating function

Abstract

The utility model discloses a ship power station cooling system with a standby auxiliary machine warming function, which comprises a first generator set, a second generator set, an expansion water tank and a water preheating device, and a water outlet of the expansion water tank is respectively connected with a first fresh water pump of the first generator set and a second fresh water pump of the second generator set through pipelines. A water outlet of the first generator set is connected with one end of the first electric three-way valve through a pipeline, and the other two ends of the first electric three-way valve are connected with a water inlet of the water preheating device and a water outlet of the second generator set through pipelines respectively. The ship power station cooling system with the standby auxiliary engine heating function can be communicated with an adjacent unit for cylinder heating when one generator unit is preheated, the engine heating efficiency is improved, meanwhile, the equipment investment is reduced, one water preheating device can be used for engine heating operation of two generator units, devices and pipelines such as preheating and light and heavy oil conversion valves are reduced, and the cost is reduced. And the use safety is improved.

Description

Technical Field

[0001] This utility model relates to the field of engine auxiliary equipment technology, specifically a ship power station cooling system with backup auxiliary warm-up function. Background Technology

[0002] Heavy fuel oil is widely used in some large cargo ships due to its low cost and high energy density. The generator sets used on these ships usually have the same fuel selection as the main engine. Therefore, the generator sets are mostly powered by engines that burn heavy fuel oil. Heavy fuel oil needs to be preheated before it can burn. The engine usually needs to be started with light fuel oil first and cannot be used directly with heavy fuel oil. The engine cylinder liner water temperature must be between 65℃ and 75℃ before heavy fuel oil can be used. For power station units on conventional ships, the operating mode is to first run the lubricating oil pump for 3 minutes, start for 10 minutes to preheat, and then switch to heavy fuel oil after the cylinder liner water temperature is reached. Before stopping, switch back to light fuel oil, idle for 10 minutes, close the fuel oil valve and air valve, and put the power station in manual position.

[0003] For a power station system consisting of two or more generator sets, each machine must be equipped with a cylinder warming pump, cylinder warming water heater or dedicated cylinder warming valve. Each machine needs to start with light oil first, and then switch to heavy oil after the cylinder liner water has heated up. Each machine needs to be operated independently. Ships usually have multiple power stations. When the above system is used, there are disadvantages such as complex piping, cumbersome operation steps, numerous equipment and poor economy. Moreover, if the manual operation of switching between valves is mistaken, it will pose a huge threat to the safety of the ship. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a ship power station cooling system with backup auxiliary warm-up function. It can communicate with the warm cylinder of the adjacent unit when one generator set is preheating, thereby improving the warm-up efficiency and reducing equipment investment. One water preheating device can be used for the warm-up operation of two generator sets, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a ship power station cooling system with backup auxiliary warm-up function, comprising a first generator set, a second generator set, an expansion tank, and a water preheating device. The outlet of the expansion tank is connected via pipelines to the first freshwater pump of the first generator set and the second freshwater pump of the second generator set, respectively. The outlet of the first generator set is connected via pipelines to one end of a first electric three-way valve. The other two ends of the first electric three-way valve are connected via pipelines to the inlet of the water preheating device and the outlet of the second generator set, respectively. The outlet of the water preheating device is connected to one end of a second electric three-way valve. The other two ends of the second electric three-way valve are connected via pipelines to the inlet of the first generator set and the inlet of the second generator set, respectively.

[0006] The drain outlets of the first generator set and the second generator set are respectively connected to the same cooling water discharge pipeline through pipelines.

[0007] As a preferred embodiment of this utility model, a shut-off valve III is provided at the outlet of the expansion tank.

[0008] As a preferred embodiment of this utility model, a shut-off valve II is provided at the drain outlet of the first generator set, and a shut-off valve I is provided at the drain outlet of the second generator set.

[0009] As a preferred embodiment of this utility model, a shut-off valve IV is provided on the cooling water drain pipe.

[0010] As a preferred embodiment of this utility model, the ventilation outlets of the first generator set and the second generator set are respectively connected to the ventilation inlet of the expansion tank via pipelines.

[0011] Compared with the prior art, the beneficial effects of this utility model are: (1) The cooling system of this ship power station with backup auxiliary warm-up function is preheated by one of the generator sets and then started with light oil. The adjacent generator sets are connected to each other for warming. Fresh water is used for preheating. The generator set to be used can be started directly with heavy oil at any time, which improves the warm-up efficiency. (2) Two generator sets can be preheated by one water preheating device, which reduces equipment investment. (3) The preheating and light-heavy oil switching valve and other devices and pipelines are reduced, making the system installation more convenient, avoiding waste in installation and operation, and improving the safety of use. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the system of this utility model;

[0013] Figure 2 This is a schematic diagram of the water flow direction when the first generator set 1 is put into operation first.

[0014] Figure 3 This is a schematic diagram of the water flow direction when the second generator unit 1 is put into operation first.

[0015] Figure 4 This is a schematic diagram showing the water flow direction when the second generator set 1 and the second generator set 2 are simultaneously in operation.

[0016] In the diagram: 1 First generator set, 2 Second generator set, 3 Expansion tank, 4 Water preheating device, 5 First electric three-way valve, 6 Second electric three-way valve, 7 Stop valve I, 8 Stop valve II, 9 Stop valve III, 10 Stop valve IV, 11 First freshwater pump, 12 Second freshwater pump. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments (for ease of description and understanding, hereinafter referred to as...). Figure 1 (The above is described above). Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] Please see Figure 1 This utility model provides a technical solution: a ship power station cooling system with backup auxiliary warm-up function includes a first generator set 1, a second generator set 2, an expansion tank 3, a water preheating device 4, a first electric three-way valve 5, a second electric three-way valve 6, a stop valve I7, a stop valve II8, a stop valve III9, a stop valve IV10, a first freshwater pump 11, and a second freshwater pump 12.

[0019] The expansion tank 3 is installed on one side of the hull bulkhead and has two interfaces, namely a water outlet and a vent inlet, to provide internal circulating cooling water for the first generator set 1 and the second generator set 2.

[0020] The first generator set 1 and the second generator set 2 are respectively arranged in the ship's engine room to provide power to the ship or drive the operation of certain equipment.

[0021] The water preheating device 4 is arranged near the generator set and includes a cylinder warming pump and a cylinder warming water heater to heat the cooling water of the first generator set 1 and the second generator set 2, so as to enable the engine to start smoothly at low temperature and increase to full load in a short time.

[0022] The first electric three-way valve 5 is installed at the inlet of the water preheating device 4, and the second electric three-way valve 6 is installed at the outlet of the water preheating device 4, so as to realize the switching when any generator set starts.

[0023] Gate valves I7, II8, III9 and IV10 are arranged on each pipeline to facilitate the cutting off of cooling water supply for safety and troubleshooting.

[0024] The first freshwater pump 11 is a motor-driven pump of the first generator set 1, and the second freshwater pump 12 is a motor-driven pump of the second generator set 2.

[0025] For ease of description, the water supply pipelines are labeled. The outlet of the expansion tank 3 is connected to the inlet of the shut-off valve III9. The outlet of the shut-off valve III9 is ​​connected to the inlet of the first generator set 1 and the second generator set 2 through pipelines 210 and 240, respectively. The high-temperature cooling water drain outlet of the first generator set 1 is connected to the inlet of the shut-off valve II8. The outlet of the shut-off valve II8 is connected to the cooling water discharge pipeline 280 through pipeline 220. A shut-off valve IV10 is installed on the cooling water discharge pipeline 280. The high-temperature cooling water vent outlet of the first generator set 1 is connected to the vent inlet of the expansion tank 3 through pipeline 270.

[0026] The high-temperature cooling water drain outlet on the second generator set 2 is connected to the inlet of the shut-off valve I7. The outlet of the shut-off valve I7 is connected to the cooling water discharge pipeline 280 through the pipeline 230. The high-temperature cooling water vent outlet on the second generator set 2 is connected to the vent inlet of the expansion tank 3 through the pipeline 260.

[0027] One of the ports of the first electric three-way valve 5 is connected to the inlet of the water preheating device 4, and the other two ports are connected to pipes 291 and 292 respectively, dividing the inlet pipe of the water preheating device 4 into two parallel lines. The other end of pipe 291 is connected to the outlet of the first generator set 1, and the other end of pipe 292 is connected to the outlet of the second generator set 2.

[0028] One of the ports of the second electric three-way valve 5 is connected to the outlet of the water preheating device 4, and the other two ports are connected to pipes 301 and 302 respectively, dividing the outlet pipe of the water preheating device 4 into two parallel lines. The other end of pipe 301 is connected to the inlet of the first generator set 1, and the other end of pipe 302 is connected to the inlet of the second generator set 2.

[0029] Pipes 210, 220, 230 and 240 are all bidirectional water pipes.

[0030] like Figure 2 The description is based on the first generator set 1 being put into operation:

[0031] When the first generator set 1 is put into operation, shut-off valve IV10 is closed, and shut-off valves I7, II8, and III9 are opened. The interface connecting the first electric three-way valve 5 to pipeline 292 is closed, while the other two interfaces are open. The interface connecting the second electric three-way valve 6 to pipeline 302 is closed, while the other two interfaces are open. The first freshwater pump 11 starts to extract the low-temperature freshwater from the expansion tank 3. The freshwater enters the water preheating device 4 through pipeline 291 and the first electric three-way valve 5 to preheat the freshwater. Then, it enters the first generator set 1 through pipeline 301 to preheat the first generator set 1 from top to bottom. The high-temperature cylinder liner water, after circulating within the unit, enters pipeline 230 through pipeline 220 and then enters the second generator set 2 to preheat the second generator set 2 from bottom to top. Finally, it enters pipeline 210 through pipeline 240, realizing the recycling of high-temperature cooling water.

[0032] like Figure 3 The description is based on the second generator set 2 being put into operation first:

[0033] When the second generator set 2 is put into operation first, shut-off valve IV10 is closed, shut-off valves I7, II8, and III9 are opened, the interface connecting the first electric three-way valve 5 to pipe 291 is closed, and the other two interfaces are open, the interface connecting the second electric three-way valve 6 to pipe 301 is closed, and the other two interfaces are open, the second freshwater pump 12 starts to extract the low-temperature freshwater from the expansion tank 3, and enters the water preheating device 4 through pipe 292 and the first electric three-way valve 5 to preheat the freshwater, and then enters the second generator set 2 through pipe 302 to preheat the second generator set 2 from top to bottom, the high-temperature cylinder liner water after circulation in the unit enters pipe 220 through pipe 230, and then enters the first generator set 1 to preheat the first generator set 1 from bottom to top, and then enters pipe 240 through pipe 210 to realize the recycling of high-temperature cooling water.

[0034] like Figure 4 When the first generator set 1 and the second generator set 2 simultaneously enter the working state:

[0035] When shut-off valves I7, II8, III9 and IV10 are opened, the interfaces of the first electric three-way valve 5 and the second electric three-way valve 6 are all opened, the first freshwater pump 11 and the second freshwater pump 12 start simultaneously, and the low-temperature freshwater flows to the generator set after being heated by the same water preheating device 4, and is finally discharged through pipeline 280.

[0036] All three heating methods described above can raise the cylinder liner water temperature of the generator set to around 70°C, meeting the requirements for starting the generator directly with heavy oil. This reduces the need for preheating devices and pipelines such as light and heavy oil switching valves, improving operational safety, reducing standby waiting time, and significantly shortening the time required to start up heavy load equipment. At the same time, it reduces the required flow rate of heating water, thus reducing the preheating time of water preheating device 4 and improving preheating efficiency. After each unit has warmed up, it can be started and connected to power at any time, regardless of whether heavy or light oil is used, providing a safety guarantee for the normal operation of the ship.

[0037] The parts of the utility model not described in detail are prior art. Although embodiments of the utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the utility model. The scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A ship power station cooling system with backup auxiliary warm-up function, comprising a first generator set (1), a second generator set (2), an expansion tank (3), and a water preheating device (4), characterized in that: The outlet of the expansion tank (3) is connected to the first freshwater pump (11) of the first generator set (1) and the second freshwater pump (12) of the second generator set (2) through pipelines. The outlet of the first generator set (1) is connected to one end of the first electric three-way valve (5) through pipelines. The other two ends of the first electric three-way valve (5) are connected to the inlet of the water preheating device (4) and the outlet of the second generator set (2) through pipelines. The outlet of the water preheating device (4) is connected to one end of the second electric three-way valve (6). The other two ends of the second electric three-way valve (6) are connected to the inlet of the first generator set (1) and the inlet of the second generator set (2) through pipelines. The drain outlets of the first generator set (1) and the second generator set (2) are respectively connected to the same cooling water discharge pipeline through pipelines.

2. A ship power plant cooling system with backup auxiliary warm-up function according to claim 1, characterized in that: The expansion tank (3) is equipped with a shut-off valve III (9) at its outlet.

3. A marine power station cooling system with backup auxiliary warm-up function according to claim 1, characterized in that: The first generator set (1) is equipped with a shut-off valve II (8) at its drain outlet, and the second generator set (2) is equipped with a shut-off valve I (7) at its drain outlet.

4. A marine power station cooling system with backup auxiliary warm-up function according to claim 1, characterized in that: A shut-off valve IV (10) is installed on the cooling water discharge pipeline.

5. A ship power station cooling system with backup auxiliary warm-up function according to claim 1, characterized in that: The ventilation outlet of the first generator set (1) and the ventilation outlet of the second generator set (2) are respectively connected to the ventilation inlet of the expansion tank (3) through pipelines.

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