A marine waste heat generator

Abstract

The utility model discloses a kind of ship waste heat generator, including exhaust boiler, waste heat economizer, waste heat generator module, expansion water tank and frequency converter, the exhaust outlet of exhaust boiler is fixedly communicated with the exhaust inlet of waste heat economizer by first connecting pipe, one side of the expansion water tank is fixedly connected with booster water pump, one side of the booster water pump is fixedly connected with water suction pipe.The utility model cooperates by exhaust boiler, waste heat economizer, waste heat generator module, expansion water tank, frequency converter, first connecting pipe, booster water pump, water suction pipe, drain pipe, heat exchange pipe, second connecting pipe, third connecting pipe, cable, exhaust pipe, forms a complete ship waste heat power generation system, can be fully recycled and utilized in the waste heat of ship diesel engine exhaust gas, convert it into electric energy and enter ship power grid, improve energy utilization efficiency, reduce energy waste, comply with the development trend of energy saving and emission reduction.

Description

Technical Field

[0001] This utility model relates to the field of waste heat energy-saving power generation technology, specifically a ship waste heat generator. Background Technology

[0002] During ship navigation, diesel engines, as the core power source, generate a large amount of high-temperature exhaust gas during combustion, with temperatures typically reaching 300-500℃, containing enormous thermal energy resources. According to industry statistics, approximately 30%-40% of the energy generated by marine diesel engine fuel combustion is directly emitted as waste heat in the form of exhaust gas. This unutilized energy not only causes serious energy waste but also increases thermal pollution from ships due to the high-temperature exhaust gas emissions.

[0003] Currently, the waste heat from marine diesel engine exhaust is not fully recovered and is only used to generate steam in exhaust gas boilers for cabin heating. The remaining waste heat is discharged into the atmosphere, resulting in a huge waste of energy and is not in line with the development trend of energy conservation and emission reduction. Therefore, we propose a marine waste heat generator. Utility Model Content

[0004] The purpose of this invention is to provide a marine waste heat generator to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a marine waste heat generator, comprising an exhaust gas boiler, a waste heat economizer, a waste heat power generation module, an expansion tank, and a frequency converter. The exhaust gas outlet of the exhaust gas boiler and the exhaust gas inlet of the waste heat economizer are fixedly connected through a first connecting pipe. A booster pump is fixedly connected to one side of the expansion tank, and a pumping pipe is fixedly connected to one side of the booster pump. One side of the pumping pipe penetrates the expansion tank and extends into the interior of the expansion tank.

[0006] Furthermore, a drain pipe is fixedly connected to the left side of the booster pump. The end of the drain pipe away from the booster pump passes through the waste heat economizer and extends into the interior of the waste heat economizer, and is fixedly connected to a heat exchange pipe.

[0007] Furthermore, the heat exchange tube is made of ND steel, and a second connecting pipe is fixedly connected to the end of the heat exchange tube away from the drain pipe.

[0008] Furthermore, the end of the second connecting pipe away from the heat exchange pipe passes through the waste heat economizer and extends to the outside of the waste heat economizer, and is fixedly connected to the hot water inlet of the waste heat power generation module.

[0009] Furthermore, the cold water outlet of the waste heat power generation module is fixedly connected to the expansion tank through a third connecting pipe, so that the waste heat power generation module, the waste heat economizer, and the expansion tank form a complete heat exchange cycle system. The power output terminal of the waste heat power generation module is electrically connected to the frequency converter through a cable.

[0010] Furthermore, the frequency converter is a vector control frequency converter with a rated capacity of 100-200kVA, which can stabilize the generator output voltage at 440V / 60Hz and then connect it to the ship's power grid. The output terminal of the frequency converter is electrically connected to the ship's power grid.

[0011] Furthermore, an exhaust pipe is fixedly connected to the left side of the waste heat economizer.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model forms a complete ship waste heat power generation system by cooperating with a waste gas boiler, a waste heat economizer, a waste heat power generation module, an expansion tank, a frequency converter, a first connecting pipe, a booster water pump, a water pumping pipe, a drain pipe, a heat exchange pipe, a second connecting pipe, a third connecting pipe, a cable, and an exhaust pipe. It can fully recover and utilize the waste heat in the exhaust gas of the ship's diesel engine, convert it into electrical energy and integrate it into the ship's power grid, thereby improving energy utilization efficiency, reducing energy waste, and conforming to the development trend of energy conservation and emission reduction.

[0013] 2. The use of frequency converters can stabilize the generator output voltage at 440V / 60Hz before connecting it to the ship's power grid, ensuring the stability and compatibility of power output and facilitating the normal operation of the ship's power grid. Attached Figure Description

[0014] Figure 1 This is a front view structural diagram of the present utility model; Figure 2 This is a front view of the structural cross-section of this utility model; Figure 3 This is a schematic diagram of the internal structure of the waste heat economizer of this utility model; Figure 4 This is a schematic diagram of the internal structure of the expansion tank of this utility model.

[0015] In the diagram: 1. Exhaust gas boiler; 2. Waste heat economizer; 3. Waste heat power generation module; 4. Expansion tank; 5. Frequency converter; 6. First connecting pipe; 7. Booster pump; 8. Pumping pipe; 9. Drain pipe; 10. Heat exchange pipe; 11. Second connecting pipe; 12. Third connecting pipe; 13. Cable; 14. Exhaust pipe. Detailed Implementation

[0016] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0018] Please see Figure 1-4 A waste heat generator for ships includes an exhaust gas boiler 1, a waste heat economizer 2, a waste heat power generation module 3, an expansion tank 4, and a frequency converter 5. The exhaust gas outlet of the exhaust gas boiler 1 and the exhaust gas inlet of the waste heat economizer 2 are fixedly connected through a first connecting pipe 6. A booster pump 7 is fixedly connected to one side of the expansion tank 4, and a pumping pipe 8 is fixedly connected to one side of the booster pump 7. One side of the pumping pipe 8 passes through the expansion tank 4 and extends into the interior of the expansion tank 4. A nitrogen accumulator (not shown in the figure) is installed behind the expansion tank 4, which can inject nitrogen into the water-sealed system to maintain the pressure in the system at 5 kg (i.e., 0.5 MPa), thereby pressurizing the water system, increasing the boiling point, and ensuring the generation of 135-degree hot water.

[0019] Specifically, a drain pipe 9 is fixedly connected to the left side of the booster pump 7. The end of the drain pipe 9 away from the booster pump 7 passes through the waste heat economizer 2 and extends into the interior of the waste heat economizer 2 and is fixedly connected to the heat exchange pipe 10.

[0020] In practice, the heat exchange tube 10 is made of ND steel, and the end of the heat exchange tube 10 away from the drain pipe 9 is fixedly connected to the second connecting pipe 11.

[0021] Specifically, the end of the second connecting pipe 11 away from the heat exchange pipe 10 passes through the waste heat economizer 2 and extends to the outside of the waste heat economizer 2 and is fixedly connected to the hot water inlet of the waste heat power generation module 3.

[0022] In practice, the cold water outlet of the waste heat power generation module 3 is fixedly connected to the expansion tank 4 through the third connecting pipe 12, so that the waste heat power generation module 3, the waste heat economizer 2, and the expansion tank 4 form a complete heat exchange cycle system. The power output end of the waste heat power generation module 3 is electrically connected to the frequency converter 5 through the cable 13.

[0023] Waste heat power generation module 3 consists of a heat exchanger and a generator. The heat exchanger receives hot water and converts it into heat energy to drive the generator (rated power 50-100kW) to generate electricity.

[0024] Specifically, inverter 5 is a vector control inverter with a rated capacity of 100-200kVA. It can stabilize the generator output voltage at 440V / 60Hz and then connect it to the ship's power grid. The output terminal of inverter 5 is electrically connected to the ship's power grid.

[0025] In practice, an exhaust pipe 14 is fixedly connected to the left side of the waste heat economizer 2.

[0026] In practical application: During operation, the high-temperature exhaust gas generated by the marine diesel engine first enters the exhaust gas boiler 1. After initial heat utilization (such as generating steam for cabin heating), the exhaust gas, still carrying a large amount of residual heat, enters the waste heat economizer 2 through the first connecting pipe 6. Simultaneously, water in the expansion tank 4, driven by the booster pump 7, is drawn through the suction pipe 8 and then transported through the drain pipe 9 to the heat exchange tubes 10 inside the waste heat economizer 2. Inside the waste heat economizer 2, the exhaust gas exchanges heat with the water in the heat exchange tubes 10. The residual heat of the exhaust gas is absorbed by the water, raising the water temperature, while the exhaust gas, having released heat, is discharged through the exhaust pipe 14. The high-temperature water that has absorbed waste heat enters the waste heat power generation module 3 through the second connecting pipe 11. The waste heat power generation module 3 converts heat energy into electrical energy. During the power generation process, the water that releases heat decreases in temperature and becomes cold water. It then flows back to the expansion tank 4 through the third connecting pipe 12, thus completing the water circulation so that it can participate in the heat absorption process again. The electrical energy generated by the waste heat power generation module 3 is transmitted to the frequency converter 5 through the cable 13. The vector control frequency converter 5 processes the electrical energy and stabilizes the unstable output voltage at 440V / 60Hz, making it conform to the ship's power grid access standard, and finally connects to the ship's power grid for ship use.

[0027] Although embodiments of the present invention 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A marine waste heat generator, characterized in that, The system includes a waste gas boiler (1), a waste heat economizer (2), a waste heat power generation module (3), an expansion tank (4), and a frequency converter (5). The waste gas outlet of the waste gas boiler (1) and the waste gas inlet of the waste heat economizer (2) are fixedly connected through a first connecting pipe (6). A booster pump (7) is fixedly connected to one side of the expansion tank (4), and a pumping pipe (8) is fixedly connected to one side of the booster pump (7). One side of the pumping pipe (8) passes through the expansion tank (4) and extends into the interior of the expansion tank (4).

2. A marine waste heat generator according to claim 1, characterized in that: A drain pipe (9) is fixedly connected to the left side of the booster pump (7). The end of the drain pipe (9) away from the booster pump (7) passes through the waste heat economizer (2) and extends into the interior of the waste heat economizer (2) and is fixedly connected to the heat exchange pipe (10).

3. A marine waste heat generator according to claim 2, characterized in that: The heat exchange tube (10) is made of ND steel, and a second connecting pipe (11) is fixedly connected to the end of the heat exchange tube (10) away from the drain pipe (9).

4. A marine waste heat generator according to claim 3, characterized in that: The end of the second connecting pipe (11) away from the heat exchange pipe (10) passes through the waste heat economizer (2) and extends to the outside of the waste heat economizer (2) and is fixedly connected to the hot water inlet of the waste heat power generation module (3).

5. A marine waste heat generator according to claim 4, characterized in that: The cold water outlet of the waste heat power generation module (3) is fixedly connected to the expansion tank (4) through a third connecting pipe (12), and the power output end of the waste heat power generation module (3) is electrically connected to the frequency converter (5) through a cable (13).

6. A marine waste heat generator according to claim 5, characterized in that: The inverter (5) is a vector control inverter with a rated capacity of 100-200kVA. It can stabilize the generator output voltage at 440V / 60Hz and then connect it to the ship's power grid. The output terminal of the inverter (5) is electrically connected to the ship's power grid.

7. A marine waste heat generator according to claim 6, characterized in that: The waste heat economizer (2) has an exhaust pipe (14) fixedly connected to its left side.

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