A marine cylinder liner water waste heat recovery system

Abstract

The utility model discloses a kind of ship cylinder jacket water waste heat recovery systems, to heat source module form provides the ship main engine of cylinder jacket water;Located ship main engine rear sequence is in turn connected to form two-stage heat exchanger first plate heat exchanger, second plate heat exchanger, and the heat exchange between ship main engine and first plate heat exchanger is connected by cylinder jacket water piping system, and the heat exchange between first plate heat exchanger and second plate heat exchanger is connected by seawater piping system, second plate heat exchanger still be provided with soft water piping system;Soft water piping system is located in the passageway rear stage branch of second plate heat exchanger is two branch lines of mutual parallel, and double branch line includes heavy cargo hold direct supply branch, air conditioning control branch;Still include expansion water tank with soft water piping system intercommunication to implement pressurization;The utility model's double-stage heat recovery ship main engine cylinder jacket water waste heat, realize fishing boat heavy cargo hold, cabin air conditioner double application branch line energy utilization, realize energy saving and emission reduction, this system space requirement is small, low in cost, suitable in small and medium-sized fishing boats is popularized.

Description

Technical Field

[0001] This utility model relates to a waste heat recovery system for ship cylinder liner water, and more particularly to a waste heat recovery system for ship cylinder liner water. Background Technology

[0002] my country has the world's largest number of fishing vessels, and fishing operations are mainly concentrated in the cold season. Small and medium-sized fishing vessels generally have a need for heating and hot water. During the operation of marine diesel engines, only a portion of the energy generated by fuel combustion is converted into propulsion power, while more than 50% of the energy is lost as waste heat. The waste heat from cylinder liner water accounts for about 25% of the total heat of the diesel engine.

[0003] Waste heat recovery from large marine diesel engines has been a hot research topic in the industry, and many methods have been proposed, such as the Kenlong cycle system, turbine power generation, water makers, waste gas boilers, and waste heat refrigeration. However, research on waste heat recovery from cylinder liner water in small and medium-sized fishing vessels is limited. Waste heat recovery devices for large ships are bulky and costly, making them unsuitable for small and medium-sized fishing vessels with limited space and economic constraints.

[0004] Therefore, there is an urgent need to develop a compact and economical cylinder liner water waste heat recovery system to meet the thermal energy needs of small and medium-sized fishing boats for heating and cargo hold insulation. Utility Model Content

[0005] To address the shortcomings of the aforementioned technologies, this utility model provides a ship cylinder liner water waste heat recovery system.

[0006] To solve the above technical problems, the technical solution adopted by this utility model is: a ship cylinder liner water waste heat recovery system, applied to small and medium-sized fishing boats and comprising:

[0007] Marine main engines that provide cylinder liner water in the form of heat source modules;

[0008] The first plate heat exchanger and the second plate heat exchanger are connected in series behind the main engine of the ship to form a two-stage heat exchange. The main engine and the first plate heat exchanger are connected for heat exchange through a cylinder liner water pipe system. The first plate heat exchanger and the second plate heat exchanger are connected for heat exchange through a seawater pipe system. The second plate heat exchanger is also equipped with a soft water pipe system.

[0009] The soft water piping system is located in the second plate heat exchanger. The downstream branch is a double branch connected in parallel. The double branch includes a direct supply branch for heavy cargo compartment and an air conditioning control branch.

[0010] It also includes an expansion tank that is connected to the soft water piping system to implement pressurization.

[0011] Furthermore, the cylinder liner water pipe system is filled with cylinder liner water, the seawater pipe system is filled with seawater, and the soft water pipe system is filled with soft water.

[0012] Furthermore, the cylinder liner water pipe system exchanges heat with the seawater pipe system in the first plate heat exchanger, and the seawater pipe system exchanges heat with the soft water pipe system in the second plate heat exchanger.

[0013] Furthermore, a first circulating water pump is installed at the end of the cylinder liner water pipe system that flows into the first plate heat exchanger, and a first valve is installed at the end of the cylinder liner water pipe system that flows into the ship's main engine.

[0014] Furthermore, a second valve and a third valve are respectively installed at the inflow ends of the seawater pipe system to the first plate heat exchanger and the second plate heat exchanger.

[0015] Furthermore, the soft water pipe system is equipped with a fourth valve and a fifth valve at the inlet and outlet ends of the circulation path of the second plate heat exchanger, respectively, and a sixth valve is also provided in the circulation path of the second plate heat exchanger.

[0016] Furthermore, the soft water piping system is equipped with an independent inlet, which is located before the flow of the fourth valve and the expansion tank. The heavy cargo compartment direct supply branch and the air conditioning control branch are both located after the flow of the fifth valve.

[0017] Furthermore, the soft water in the heavy cargo hold direct supply branch flows through the heavy cargo hold of the fishing boat, and the soft water in the air conditioning control branch flows through the heat pump and the cabin air conditioner in sequence. The soft water flowing through the heavy cargo hold direct supply branch and the air conditioning control branch respectively merge and are then pumped to the inlet end of the second plate heat exchanger by the second circulating water pump. Attached Figure Description

[0018] Figure 1 This is a schematic diagram illustrating the circulation of this utility model.

[0019] In the diagram: 1. Expansion tank; 2. First heat exchanger; 3. Second heat exchanger; 4. Main engine; 5. First circulating water pump; 6. First valve; 7. Second valve; 8. Third valve; 9. Fourth valve; 10. Fifth valve; 11. Sixth valve; 12. Heavy cargo hold of the fishing vessel; 13. Heat pump; 14. Cabin air conditioner; 15. Second circulating water pump. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1 As shown, this embodiment relates to a ship cylinder liner water waste heat recovery system, wherein the ship cylinder liner water waste heat recovery system is applied to small and medium-sized fishing vessels and includes:

[0022] The ship's main engine 4, which provides cylinder liner water in the form of a heat source module, can be understood as heating its own cylinder liner water through the waste heat generated during its operation. A first plate heat exchanger 2 and a second plate heat exchanger 3, located sequentially in series after the main engine 4 to form a two-stage heat exchange, can be understood as the first plate heat exchanger 2 handling the first stage of heat exchange and the second plate heat exchanger 3 handling the second stage of heat exchange. Furthermore, the main engine 4 and the first plate heat exchanger 2 are connected for heat exchange via a cylinder liner water piping system filled with cylinder liner water. Heat exchange is achieved between heat exchanger 2 and the second plate heat exchanger 3 via a seawater pipe system filled with seawater. The second plate heat exchanger 3 is also equipped with a soft water pipe system filled with soft water. The soft water pipe system is located in the second plate heat exchanger 3 and its downstream branch is a parallel double branch, which includes a heavy cargo hold direct supply branch and an air conditioning control branch. It can be understood that this embodiment forms two parallel application branches in terms of heat utilization, increasing the heat utilization scenarios and improving heat utilization efficiency. In addition, it also includes an expansion tank 1 connected to the soft water pipe system for pressurization.

[0023] The first plate heat exchanger 2 is implemented to achieve heat exchange between the cylinder liner water and seawater. After the heat exchange is achieved, the seawater becomes the heat source. Then, the second plate heat exchanger 3 is implemented to achieve heat exchange between the seawater and soft water. The heated soft water becomes the usable heat medium.

[0024] A first circulating water pump 5 is installed at the end of the cylinder liner water pipe system flowing into the first plate heat exchanger 2, and a first valve 6 is installed at the end of the cylinder liner water pipe system flowing into the ship's main engine 4; a second valve 7 and a third valve 8 are respectively installed at the inflow ends of the seawater pipe system into the first plate heat exchanger 2 and the second plate heat exchanger 3; a fourth valve 9 and a fifth valve 10 are respectively installed at the inflow and outflow ends of the soft water pipe system in the circulation passage of the second plate heat exchanger 3, and a sixth valve 11 is also installed in the circulation passage of the soft water pipe system in the second plate heat exchanger 3.

[0025] In the soft water pipe system circulation system, the soft water pipe system is equipped with an independent water inlet, which is located before the flow of the fourth valve 9 and the expansion tank 1, thereby ensuring the effective replenishment of soft water. The heavy cargo hold direct supply branch and the air conditioning control branch are both located after the flow of the fifth valve 10. It should be noted that the sixth valve 11 is located on the bypass pipe in the actual soft water flow. The sixth valve 11 maintains the flow of the ship's cylinder liner water waste heat recovery system by bypassing the pipe and short-circuiting the circulation.

[0026] The soft water in the direct supply branch of the heavy cargo hold flows through the heavy cargo hold 12 of the fishing boat. After heat exchange, the soft water releases heat into the heavy cargo hold 12 of the fishing boat. In actual operation, the soft water can exchange heat with the air in the hold through the built-in coils or radiators in the heavy cargo hold 12 of the fishing boat. The soft water in the air conditioning control branch flows through the heat pump 13 and the cabin air conditioner 14 in sequence. The heat pump 13 raises the temperature of the soft water so that it can flow into the cabin air conditioner 14 for heating. The cooled soft water that flows through the direct supply branch of the heavy cargo hold and the air conditioning control branch respectively merges and is pumped to the inlet end of the second plate heat exchanger 3 after passing through the second circulating water pump 15.

[0027] The operation process method of this embodiment includes the following steps:

[0028] S1. After running the ship's main engine 4 and the first circulating water pump 5, open the first valve 6 so that the cylinder liner water flows through the ship's main engine 4 to absorb heat, and then is pressurized by the first circulating water pump 5 and enters the first heat exchanger 2 through the cylinder liner water pipeline system to release heat, and then flows back to the ship's main engine 4 through the first valve 6.

[0029] S2. Open the second valve 7 and the third valve 8 so that the seawater flows through the first heat exchanger 2 to absorb heat, then enters the second heat exchanger 3 through the third valve 8 to release heat, and then flows back to the first heat exchanger 2 through the second valve 7.

[0030] S3. Close the sixth valve 11, open the fourth valve 9 and the fifth valve 10. After the soft water is pressurized by the expansion tank 1, it enters the second heat exchanger 3 through the fourth valve 9 to absorb heat, and then exits through the fifth valve 10.

[0031] S4. Stream the soft water output from step S3.

[0032] The first part of the soft water flows to the heavy cargo hold 12 of the fishing boat to release heat.

[0033] The second part of the soft water flows through heat pump 13 and is heated before being supplied to the cabin air conditioner 14 to release heat.

[0034] S5. The cooling soft water discharged from the first and second parts in step S4 is collected, pressurized by the second circulating water pump 15, and returned to the soft water inlet.

[0035] This application discloses a ship cylinder liner water waste heat recovery system, which recovers waste heat from the ship's main engine cylinder liner water through a two-stage heat exchanger. It enables energy utilization in both the heavy cargo hold and the cabin air conditioning of fishing boats, achieving energy conservation and emission reduction. The system has small space requirements and low cost, making it suitable for promotion in small and medium-sized fishing boats.

[0036] The above embodiments are not intended to limit the present utility model, nor is the present utility model limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the technical solution of the present utility model are also within the protection scope of the present utility model.

Claims

1. A ship cylinder liner water waste heat recovery system, characterized in that, Applicable to small and medium-sized fishing vessels and including: Marine main engine that provides cylinder liner water in the form of a heat source module (4); The first plate heat exchanger (2) and the second plate heat exchanger (3) are connected in series behind the ship's main engine (4) to form a two-stage heat exchange. The ship's main engine (4) and the first plate heat exchanger (2) are connected for heat exchange through a cylinder liner water pipe system. The first plate heat exchanger (2) and the second plate heat exchanger (3) are connected for heat exchange through a seawater pipe system. The second plate heat exchanger (3) is also equipped with a soft water pipe system. The soft water pipe system is located in the second plate heat exchanger (3). The downstream branch is a double branch connected in parallel. The double branch includes a heavy cargo hold direct supply branch and an air conditioning control branch. It also includes an expansion tank (1) that is connected to the soft water piping system to implement pressurization.

2. The ship cylinder liner water waste heat recovery system according to claim 1, characterized in that: The cylinder liner water pipe system is filled with cylinder liner water, the seawater pipe system is filled with seawater, and the soft water pipe system is filled with soft water.

3. The ship cylinder liner water waste heat recovery system according to claim 2, characterized in that: The cylinder liner water pipe system exchanges heat with the seawater pipe system in the first plate heat exchanger (2), and the seawater pipe system exchanges heat with the soft water pipe system in the second plate heat exchanger (3).

4. The ship cylinder liner water waste heat recovery system according to claim 1, characterized in that: A first circulating water pump (5) is installed at one end of the cylinder liner water pipe system flowing into the first plate heat exchanger (2), and a first valve (6) is installed at one end of the cylinder liner water pipe system flowing into the ship's main engine (4).

5. The ship cylinder liner water waste heat recovery system according to claim 1, characterized in that: The seawater pipe system is equipped with a second valve (7) and a third valve (8) at the inflow ends of the first plate heat exchanger (2) and the second plate heat exchanger (3), respectively.

6. The ship cylinder liner water waste heat recovery system according to claim 1, characterized in that: The soft water pipe system is equipped with a fourth valve (9) and a fifth valve (10) at the inlet and outlet ends of the circulation path of the second plate heat exchanger (3), respectively. The soft water pipe system is also equipped with a sixth valve (11) in the circulation path of the second plate heat exchanger (3).

7. The ship cylinder liner water waste heat recovery system according to claim 6, characterized in that: The soft water pipe system is equipped with an independent inlet end, which is located before the flow of the fourth valve (9) and the expansion tank (1). The heavy cargo compartment direct supply branch and the air conditioning control branch are both located after the flow of the fifth valve (10).

8. The ship cylinder liner water waste heat recovery system according to claim 2, characterized in that: The soft water in the heavy cargo hold direct supply branch flows through the heavy cargo hold (12) of the fishing boat. The soft water in the air conditioning control branch flows through the heat pump (13) and the cabin air conditioner (14) in sequence. The soft water flowing through the heavy cargo hold direct supply branch and the air conditioning control branch merges and is then pumped to the inlet end of the second plate heat exchanger (3) by the second circulating water pump (15).

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