Ship engine waste heat recovery system

Abstract

The utility model relates to the technical field of ship engine waste heat recovery, in particular to a ship engine waste heat recovery system which comprises a heat exchanger and a ship engine. The ship engine is provided with a high-temperature waste gas pipe and a high-temperature cooling water pipe; the high-temperature waste gas pipe and the high-temperature cooling water pipe are both connected with the heat exchanger; a fan is arranged on one side of the heat exchanger; the fan is connected with a drying chamber; a sensor assembly is arranged in the drying chamber; the heat exchanger, the draught fan and the sensor assembly are all connected with the controller. High-temperature cooling water and high-temperature waste gas of a ship engine are connected to the heat exchanger through a pipeline, the heat exchanger uses waste heat to heat air, the fan feeds hot air into the drying chamber from the heat exchanger, and articles in the drying chamber are dried under the action of the hot air. The controller monitors the temperature of the drying chamber in real time and adjusts the rotating speed of the draught fan and the heat exchange efficiency of the heat exchanger according to the set temperature range.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology for marine engines, specifically, to a waste heat recovery system for marine engines. Background Technology

[0002] Currently, the waste heat from ship engines is not effectively utilized, resulting in a significant waste of energy. The complex navigation environment of ships, including the high humidity of the ocean, makes items highly susceptible to moisture. Clothing and tools that have become damp during operations take a long time to dry, which greatly affects the health and work efficiency of the crew. Currently, ships cannot recycle and utilize the waste heat from ship engines to provide drying convenience for the crew.

[0003] The applicant discovered through a search that Chinese patent document application number 202021184803.4, published on April 16, 2021, discloses a redundancy system for marine engines. The redundancy system includes: a main ECU for controlling the operating state of the marine engine; and a backup ECU communicatively connected to the main ECU. When the main ECU is working normally, the backup ECU is in a standby state; when the main ECU is in a fault state, the backup ECU takes over controlling the operating state of the marine engine. This device also fails to solve the aforementioned technical problem.

[0004] Therefore, in order to improve or solve at least one of the above problems, it is necessary to provide a ship engine waste heat recovery system that can efficiently dry items for crew members using the waste heat of ship engines. Utility Model Content

[0005] The purpose of this invention is to provide a waste heat recovery system for ship engines that can efficiently dry items for crew members using waste heat from ship engines.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a waste heat recovery system for a ship engine, including a heat exchanger and a ship engine; the ship engine is provided with a high-temperature exhaust pipe and a high-temperature cooling water pipe; both the high-temperature exhaust pipe and the high-temperature cooling water pipe are connected to the heat exchanger; a fan is provided on one side of the heat exchanger; the fan is connected to a drying chamber; a sensor assembly is provided in the drying chamber; the heat exchanger, the fan, and the sensor assembly are all connected to a controller.

[0007] The heat exchanger is equipped with a waste gas heat exchange pipe and a cooling water heat exchange pipe; a medium pipeline is connected to one side of the heat exchanger; and the fan is located on one side of the medium pipeline.

[0008] One end of the exhaust gas heat exchange pipe is connected to an exhaust fan, and the other end of the exhaust gas heat exchange pipe is connected to an exhaust gas treatment pipeline; the exhaust fan is connected to the high-temperature exhaust gas pipe; one end of the cooling water heat exchange pipe is connected to a first water pump, and the other end of the cooling water heat exchange pipe is connected to a cooling water circulation pipeline; the first water pump is connected to the high-temperature cooling water pipe.

[0009] The heat exchanger has a cavity; the waste gas heat exchange tube and the cooling water heat exchange tube are both located in the cavity, and the cavity contains coolant; the heat exchanger has an inlet and an outlet; a second water pump is connected to the outlet; one end of the medium pipeline is connected to the second water pump, and the other end of the second water pump is connected to the inlet.

[0010] The medium pipeline is located in the mounting housing; the fan is located on the side of the mounting housing away from the heat exchanger; the top of the mounting housing is provided with an air inlet slot; the fan is connected to an air supply pipe; the air supply pipe is connected to the drying chamber.

[0011] The drying chamber is provided with a drying cavity; the drying chamber is provided with a heat insulation layer; the drying chamber is connected to an exhaust pipe; the exhaust pipe is connected to an exhaust fan; the sensor assembly includes a temperature sensor and a humidity sensor; both the temperature sensor and the humidity sensor are connected to the controller.

[0012] The controller is a PLC controller; the controller is connected to the first water pump, the exhaust fan and the second water pump.

[0013] The insulation layer is a rock wool layer, a glass fiber layer, or a ceramic fiber layer.

[0014] The beneficial effects of this utility model are as follows:

[0015] In this invention, the high-temperature cooling water and high-temperature exhaust gas of the ship's engine are connected to a heat exchanger via pipelines. The heat exchanger uses waste heat to heat the air, and a fan sends the hot air from the heat exchanger into the drying chamber. Items in the drying chamber are dried under the action of the hot air. The controller monitors the temperature of the drying chamber in real time and adjusts the fan speed and the heat exchange efficiency of the heat exchanger according to the set temperature range. This device utilizes the waste heat of the ship's engine, requiring no additional energy supply and saving energy. This device can reduce operating costs and improve economic efficiency. Attached Figure Description

[0016] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2This is a schematic diagram showing the connection between the heat exchanger and the ship engine of this utility model.

[0019] Figure 3 This is a schematic diagram of the internal structure of the heat exchanger of this utility model.

[0020] Figure 4 This is a front view of the heat exchanger of this utility model.

[0021] Figure 5 This is a block diagram of the controller's working logic.

[0022] The markings in the above figures are all:

[0023] The diagram is marked as follows:

[0024] 1. Heat exchanger; 101. Medium pipeline; 102. Cavity; 103. Water inlet; 104. Water outlet; 105. Second water pump.

[0025] 2. Marine engines

[0026] 3. High-temperature exhaust gas pipe, 301. Exhaust gas heat exchange pipe, 302. Exhaust fan.

[0027] 4. High-temperature cooling water pipes; 401. Cooling water heat exchange pipes; 402. First water pump.

[0028] 5. Fan,

[0029] 6. Drying chamber; 601. Drying cavity; 602. Insulation layer; 603. Exhaust pipe; 604. Exhaust fan.

[0030] 7. Controller

[0031] 8. Install the housing; 801. Air inlet duct; 802. Air supply duct.

[0032] 9. Temperature sensor; 901. Humidity sensor. Detailed Implementation

[0033] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of this utility model, and to facilitate its implementation.

[0034] Figure 1-5The waste heat recovery system of the ship engine shown includes a heat exchanger 1 and a ship engine 2; the ship engine 2 is equipped with a high-temperature exhaust pipe 3 and a high-temperature cooling water pipe 4; both the high-temperature exhaust pipe 3 and the high-temperature cooling water pipe 4 are connected to the heat exchanger 1; a fan 5 is provided on one side of the heat exchanger 1; the fan 5 is connected to a drying chamber 6; a sensor assembly is provided in the drying chamber 6; the heat exchanger 1, the fan 5 and the sensor assembly are all connected to a controller 7.

[0035] The high-temperature cooling water and high-temperature exhaust gas from the ship engine 2 are connected to the heat exchanger 1 through pipes. The heat exchanger 1 uses waste heat to heat the air. The fan 5 sends the hot air from the heat exchanger 1 into the drying chamber 6. The items in the drying chamber 6 are dried under the action of the hot air. The controller 7 monitors the temperature of the drying chamber 6 in real time and adjusts the speed of the fan 5 and the heat exchange efficiency of the heat exchanger 1 according to the set temperature range. This device utilizes the waste heat of the ship engine 2, requiring no additional energy supply and saving energy. This device can reduce operating costs and improve economic efficiency.

[0036] The heat exchanger 1 is equipped with a waste gas heat exchange tube 301 and a cooling water heat exchange tube 401; a medium pipeline 101 is connected to one side of the heat exchanger 1; and a fan 5 is located on one side of the medium pipeline 101.

[0037] The high-temperature exhaust gas generated by the ship engine 2 flows into the exhaust gas heat exchange tube 301 inside the heat exchanger 1, and the high-temperature cooling water of the ship engine 2 flows into the cooling water heat exchange tube 401. The heat exchanger 1 is equipped with a low-temperature coolant. The high-temperature exhaust gas and high-temperature cooling water transfer heat to the low-temperature coolant through the exhaust gas heat exchange tube 301 and the cooling water heat exchange tube 401, respectively, to achieve heat exchange and raise the temperature of the low-temperature coolant. The heated coolant flows into the medium pipeline 101 on one side of the heat exchanger 1. Since the medium pipeline 101 has good thermal conductivity, it can heat the air on one side of the medium pipeline 101. The fan 5 installed on one side of the medium pipeline 101 blows the hot air into the drying chamber 6.

[0038] One end of the exhaust gas heat exchange pipe 301 is connected to an exhaust fan 302, and the other end of the exhaust gas heat exchange pipe 301 is connected to an exhaust gas treatment pipeline; the exhaust fan 302 is connected to the high-temperature exhaust gas pipe 3; one end of the cooling water heat exchange pipe 401 is connected to a first water pump 402, and the other end of the cooling water heat exchange pipe 401 is connected to a cooling water circulation pipeline; the first water pump 402 is connected to the high-temperature cooling water pipe 4.

[0039] When the ship engine 2 is working, it generates high-temperature exhaust gas. The exhaust fan 302 starts to generate suction, which transports the high-temperature exhaust gas to the exhaust gas heat exchange tube 301 in the heat exchanger 1. The high-temperature exhaust gas flows in the exhaust gas heat exchange tube 301, transferring heat to the low-temperature coolant in the heat exchanger 1. After completing the heat exchange, the exhaust gas flows along the exhaust gas heat exchange tube 301 to the exhaust gas treatment pipeline connected to the other end for subsequent purification. The high-temperature cooling water pipe 4 of the ship engine 2 is connected to the cooling water heat exchange tube 401 through the first water pump 402. When the first water pump 402 starts, it pumps high-temperature cooling water into the cooling water heat exchange tube 401, which transfers heat to the low-temperature coolant through heat conduction. The low-temperature coolant absorbs heat from the exhaust gas and cooling water, and then flows into the medium pipeline 101 on one side of the heat exchanger 1. With the help of the good thermal conductivity of the medium pipeline 101, it heats the air.

[0040] The heat exchanger 1 is provided with a cavity 102; the waste gas heat exchange tube 301 and the cooling water heat exchange tube 401 are both provided in the cavity 102, and the cavity 102 is provided with coolant; the heat exchanger 1 is provided with a water inlet 103 and a water outlet 104 respectively; a second water pump 105 is connected to the water outlet 104; one end of the medium pipeline 101 is connected to the second water pump 105, and the other end of the second water pump 105 is connected to the water inlet 103.

[0041] Coolant is provided in the cavity 102 of heat exchanger 1. High-temperature exhaust gas and high-temperature cooling water are respectively transferred to the coolant by heat conduction through exhaust gas heat exchange tube 301 and cooling water heat exchange tube 401, raising the temperature of the coolant. Heat exchanger 1 is provided with water inlet 103 and water outlet 104. The heated coolant flows out through water outlet 104. The second water pump 105 connected to water outlet 104 is started to pressurize and deliver the outflowing coolant to one end of medium pipeline 101. 01. Good thermal conductivity heats the air near the medium pipeline 101; the coolant released after heat flows out from the other end of the medium pipeline 101 and, under the action of the second water pump 105, flows back into the cavity 102 of the heat exchanger 1 through the water inlet 103 to continue participating in the heat exchange process; the medium pipeline 101, the exhaust gas heat exchange pipe 301 and the cooling water heat exchange pipe 401 are all copper pipes or aluminum alloy pipes; the medium pipeline 101, the exhaust gas heat exchange pipe 301 and the cooling water heat exchange pipe 401 are all U-shaped structures.

[0042] The medium pipeline 101 is located in the mounting housing 8; the fan 5 is located on the side of the mounting housing 8 away from the heat exchanger 1; the top of the mounting housing 8 is provided with an air inlet slot 801; the fan 5 is connected to an air supply pipe 802; the air supply pipe 802 is connected to the drying chamber 6.

[0043] The air inlet 801 at the top of the mounting housing 8 draws in outside air, and the medium pipeline 101 heats the air in the mounting housing 8. After the fan 5 is started, the fan 5 delivers the heated air to the drying chamber 6 through the air supply pipe 802 to provide the required hot air to the drying chamber 6 and meet the drying requirements.

[0044] The drying chamber 6 is provided with a drying cavity 601; the drying chamber 6 is provided with a heat insulation layer 602; the drying chamber 6 is connected to an exhaust pipe 603; the exhaust pipe 603 is connected to an exhaust fan 604; the sensor assembly includes a temperature sensor 9 and a humidity sensor 901; both the temperature sensor 9 and the humidity sensor 901 are connected to the controller 7.

[0045] The heat insulation layer 602 on the drying chamber 6 effectively reduces heat loss and ensures a stable temperature inside the drying chamber 601. During the drying process, the temperature sensor 9 and humidity sensor 901 monitor the temperature and humidity data inside the drying chamber 601 in real time and transmit the data to the controller 7 for precise control of the drying process. The humid exhaust gas generated during drying is discharged from the drying chamber 6 through the exhaust pipe 603 under the action of the exhaust fan 604, maintaining the drying environment inside the drying chamber 601 and ensuring the drying effect.

[0046] The controller 7 is a PLC controller; the controller 7 is connected to the first water pump 402, the exhaust fan 302 and the second water pump 105.

[0047] The controller 7 can control the opening and closing of the first water pump 402, the exhaust fan 302 and the second water pump 105, thereby controlling the heat exchange efficiency of the heat exchanger 1. The controller 7 monitors the temperature and humidity in the drying chamber 6 in real time through the temperature sensor 9 and the humidity sensor 901. The controller 7 adjusts the heat exchange efficiency of the heat exchanger 1 and the hot air delivery efficiency of the fan 5 to ensure the drying requirements of the drying chamber 6.

[0048] The insulation layer 602 is a rock wool layer, a glass fiber layer, or a ceramic fiber layer.

[0049] The rock wool layer possesses excellent thermal insulation properties. Its fibrous structure effectively prevents heat conduction, significantly reducing heat loss from the drying chamber 6 to the external environment. This maintains a stable high-temperature environment within the drying chamber 601, reducing energy consumption and improving energy efficiency. Rock wool also offers good fire resistance, providing additional safety for the drying chamber 6. The fiberglass layer also exhibits excellent thermal insulation characteristics. Its lightweight nature and easy installation allow it to effectively block heat transfer without adding excessive structural weight, helping to reduce the overall structural load on the drying chamber 6. Furthermore, fiberglass is chemically stable and highly corrosion-resistant, adapting to various complex working environments and extending the service life of the drying chamber 6. The ceramic fiber layer excels in high-temperature resistance, withstanding extremely high temperatures without performance changes. In the high-temperature environment of the drying chamber 6, it provides stable and long-lasting thermal insulation, ensuring the drying process is unaffected by external temperatures, greatly improving drying efficiency and product quality, and providing a solid guarantee for the efficient and stable operation of the entire drying system.

[0050] The specific workflow of this utility model is as follows:

[0051] The high-temperature exhaust gas generated by the ship engine 2 flows into the exhaust gas heat exchange tube 301 inside the heat exchanger 1, and the high-temperature cooling water of the ship engine 2 flows into the cooling water heat exchange tube 401. The heat exchanger 1 is equipped with a low-temperature coolant. The high-temperature exhaust gas and high-temperature cooling water transfer heat to the low-temperature coolant through the exhaust gas heat exchange tube 301 and the cooling water heat exchange tube 401, respectively, to achieve heat exchange and raise the temperature of the low-temperature coolant. The heated coolant flows into the medium pipeline 101 on one side of the heat exchanger 1. Since the medium pipeline 101 has good thermal conductivity, it can heat the air on one side of the medium pipeline 101. The fan 5 installed on one side of the medium pipeline 101 blows the hot air into the drying chamber 6.

[0052] The controller 7 monitors the temperature and humidity in the drying chamber 6 in real time through the temperature sensor 9 and the humidity sensor 901. The controller 7 adjusts the heat exchange efficiency of the heat exchanger 1 and the hot air delivery efficiency of the fan 5 to ensure the drying requirements of the drying chamber 6.

[0053] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A marine engine waste heat recovery system, characterized by: The utility model provides a heat exchanger (1) and marine engine (2), marine engine (2) is equipped with high temperature exhaust pipe (3) and high temperature cooling water pipe (4), high temperature exhaust pipe (3) and high temperature cooling water pipe (4) are connected with heat exchanger (1), one side of heat exchanger (1) is equipped with fan (5), fan (5) is connected with drying chamber (6), be equipped with sensor assembly in drying chamber (6), heat exchanger (1), fan (5) and sensor assembly are connected with controller (7).

2. A marine engine waste heat recovery system according to claim 1, characterised in that: The heat exchanger (1) is provided with an exhaust heat exchange pipe (301) and a cooling water heat exchange pipe (401); one side of the heat exchanger (1) is connected with a medium pipeline (101); the fan (5) is arranged on one side of the medium pipeline (101).

3. A marine engine waste heat recovery system according to claim 2, characterised in that: One end of the exhaust heat exchange pipe (301) is connected with an exhaust fan (302), and the other end of the exhaust heat exchange pipe (301) is connected with an exhaust treatment pipeline; the exhaust fan (302) is connected with the high-temperature exhaust pipe (3); one end of the cooling water heat exchange pipe (401) is connected with a first water pump (402), and the other end of the cooling water heat exchange pipe (401) is connected with a cooling water circulation pipeline; the first water pump (402) is connected with the high-temperature cooling water pipe (4).

4. A marine engine waste heat recovery system according to claim 3, characterised in that: The heat exchanger (1) is provided with a cavity (102); the exhaust heat exchange pipe (301) and the cooling water heat exchange pipe (401) are arranged in the cavity (102), and cooling liquid is arranged in the cavity (102); the heat exchanger (1) is respectively provided with a water inlet hole (103) and a water outlet hole (104); the water outlet hole (104) is connected with a second water pump (105); one end of the medium pipeline (101) is connected with the second water pump (105), and the other end of the second water pump (105) is connected with the water inlet hole (103).

5. A marine engine waste heat recovery system according to claim 4, characterised in that: The medium pipeline (101) is arranged in a mounting shell (8); the fan (5) is arranged on the side of the mounting shell (8) away from the heat exchanger (1); the mounting shell (8) is provided with an air inlet groove (801) at the top; the fan (5) is connected with a supply air pipe (802); the supply air pipe (802) is in communication with the drying chamber (6).

6. A marine engine waste heat recovery system according to claim 5, characterised in that: The drying chamber (6) is provided with a drying cavity (601); the drying chamber (6) is provided with a heat insulation layer (602); the drying chamber (6) is connected with an exhaust pipe (603); the exhaust pipe (603) is connected with an exhaust fan (604); the sensor assembly comprises a temperature sensor (9) and a humidity sensor (901); the temperature sensor (9) and the humidity sensor (901) are connected with the controller (7).

7. A marine engine waste heat recovery system according to claim 6, characterised in that: The controller (7) is a PLC controller; the controller (7) is connected with the first water pump (402), the exhaust fan (302), and the second water pump (105).

8. A marine engine exhaust heat recovery system according to any one of claims 6-7, characterized in that: The heat insulation layer (602) is a rock wool layer, a glass fiber layer, or a ceramic fiber layer.

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