Waste heat recovery system and ship

Abstract

The present invention relates to the technical field of shipbuilding, and specifically discloses a waste heat recovery system and a ship. The waste heat recovery system includes an air cooler, a circulating pump and a fresh water maker. The air cooler has a first inlet and a circulating port. The water inlet end of the circulating pump can be connected to the fresh water cooling system, and the water outlet end of the circulating pump is connected to the first inlet, so that the cooling water in the fresh water cooling system enters the air cooler through the circulating pump. One end of the fresh water maker is connected to the circulating port, and the other end is connected to the water inlet end of the circulating pump. The ship adopts the above-mentioned waste heat recovery system, and circulates the cooling water in the air cooler into the fresh water maker through the circulating pump, so that the waste heat of the cooling water provides energy for the fresh water maker to make fresh water, thereby improving the ship's fresh water making capacity. At the same time, the waste heat of the cooling water is fully utilized to save energy.

Description

Technical Field

[0001] The present invention belongs to the technical field of shipbuilding, and in particular relates to a waste heat recovery system and a ship. Background Art

[0002] At present, the propulsion system of ships is mostly driven by fuel oil and methanol dual fuel. When the fuel oil driving mode is adopted, the ship needs to consume a large amount of fresh water.

[0003] In order to save the fresh water resources of the ship and ensure the fresh water supply of the ship, a fresh water maker is generally used to desalinate seawater, and the fresh water produced by the water maker is used to ensure the propulsion water of the ship. At present, the main engine jacket water of the ship is generally used to provide a heat source for the fresh water maker. With the increase in the water consumption of the propulsion system, the amount of fresh water produced by an existing fresh water maker can no longer meet the navigation needs of the ship. It is necessary to add another fresh water maker to increase the amount of fresh water produced. The existing problem is that the flow rate and heat of the existing main engine jacket water cannot provide a heat source for two fresh water makers at the same time, and it is impossible to ensure that the two fresh water makers operate at the same time, and the amount of fresh water required for the normal operation of the ship cannot be met.

[0004] Therefore, a waste heat recovery system and a ship are needed to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a waste heat recovery system and a ship, so as to improve the ability of the ship to produce fresh water and save energy consumption.

[0006] To achieve this purpose, the technical solution adopted by the present invention is:

[0007] An air cooler cooling water waste heat recovery system, comprising:

[0008] An air cooler having a first inlet and a circulation port;

[0009] a circulating pump, wherein a water inlet of the circulating pump can be communicated with a fresh water cooling system, and a water outlet of the circulating pump is communicated with the first inlet, so that cooling water in the fresh water cooling system passes through the circulating pump and enters the air cooler; and

[0010] A fresh water generator, one end of which is connected to the circulation port, and the other end of which is connected to the water inlet end of the circulation pump.

[0011] Furthermore, the air cooler cooling water waste heat recovery system also includes:

[0012] a first circulation pipeline, one end of which is connected to the circulation port, and the other end of which is connected to one end of the fresh water generator;

[0013] a second circulation pipeline, one end of which is connected to the other end of the fresh water generator, and the other end of which is connected to the water inlet end of the circulation pump; and

[0014] The first three-way valve has a first port, a second port and a third port; the first port is connected to the third port and both are connected to the second circulation pipeline; the second port is closed and is connected to the first circulation pipeline; the first three-way valve is configured to open the second port at a set opening to connect with the third port when the temperature of the cooling water flowing out of the circulation port is lower than a first set value.

[0015] Furthermore, the waste heat recovery system further comprises:

[0016] a third circulation pipeline, one end of which is in communication with the first circulation pipeline, and the other end of which is capable of being in communication with the first port of the first three-way valve; and

[0017] The first circulation maintaining valve is installed in the third circulation pipeline and is configured to open when the fresh water generator is shut down.

[0018] Furthermore, the waste heat recovery system further comprises:

[0019] A water inlet pipeline, comprising a first branch pipe, one end of which is connected to the fresh water cooling system, and the other end of which is connected to the water inlet end of the circulating pump;

[0020] A water outlet pipeline, the air cooler also has a return port, one end of the water outlet pipeline is connected to the fresh water cooling system, and the other end is connected to the return port; and

[0021] The second three-way valve has a fifth port and a sixth port; the fifth port is connected to the sixth port, the fifth port is connected to the first branch pipe, and the sixth port is connected to the water outlet pipeline.

[0022] Furthermore, the second three-way valve also has a fourth port, which remains closed and is connected to the second circulation pipeline; the second three-way valve is configured to open the fourth port at a set opening degree to communicate with the sixth port when the temperature of the cooling water flowing out of the circulation port is higher than a second set value.

[0023] Furthermore, the waste heat recovery system further comprises:

[0024] The first flow valve is installed in the first branch pipe to control the flow of cooling water in the first branch pipe.

[0025] Furthermore, the water inlet pipeline further includes a second branch pipe, the air cooler further includes a second inlet, one end of the second branch pipe is connected to the fresh water cooling system, and the other end is connected to the second inlet of the air cooler;

[0026] The waste heat recovery system further includes a second flow valve, which is connected and installed in the second branch pipe to control the flow of cooling water in the second branch pipe.

[0027] Furthermore, the waste heat recovery system further comprises:

[0028] a fourth circulation pipeline, one end of which is in communication with the first inlet of the air cooler, and the other end of which is capable of being in communication with the first branch pipe;

[0029] The second port of the first three-way valve is communicated with the third port, and the fourth port of the second three-way valve is communicated with the sixth port; and

[0030] The second circulation maintaining valve is installed in the fourth circulation pipeline and is configured to open when the circulation pump is stopped.

[0031] Furthermore, a plurality of the circulation pumps are provided, and one or more of the plurality of circulation pumps can be selectively opened or closed.

[0032] A ship comprises the above-mentioned waste heat recovery system.

[0033] The beneficial effects of the present invention are:

[0034] The waste heat recovery system proposed by the present invention circulates the cooling water in the air cooler into the fresh water generator through a circulating pump, so that the waste heat of the cooling water provides energy for the fresh water generator to produce fresh water, thereby improving the fresh water production capacity of the ship. At the same time, the waste heat of the cooling water of the air cooler is fully utilized to save energy consumption.

[0035] The ship proposed by the present invention adopts the above waste heat recovery system, and circulates the cooling water in the air cooler into the fresh water generator through a circulating pump, so that the waste heat of the cooling water provides energy for the fresh water generator to produce fresh water, thereby improving the ship's fresh water production capacity. At the same time, the waste heat of the cooling water of the air cooler is fully utilized to save energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural distribution diagram of a waste heat recovery system provided in an embodiment of the present invention.

[0037] The names and numbers of the components in the figure are as follows:

[0038] 100. Fresh water cooling system;

[0039] 10, first circulation pipeline; 20, second circulation pipeline; 30, third circulation pipeline; 40, fourth circulation pipeline; 50, water inlet pipeline; 501, first branch pipe; 502, second branch pipe; 60, water outlet pipeline;

[0040] 1. Air cooler; 11. First inlet; 12. Circulation port; 13. Second inlet; 14. Reflux port; 2. Fresh water generator; 3. Circulation pump; 4. First three-way valve; 5. Second three-way valve; 6. First flow valve; 7. Second flow valve; 8. First circulation holding valve; 9. Second circulation holding valve. DETAILED DESCRIPTION

[0041] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, not all.

[0042] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0045] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0046] At present, the propulsion system of ships needs to consume a large amount of fresh water. A fresh water generator is installed on the ship, which uses the jacket water of the main engine of the ship as a heat source for the fresh water generator, and desalinates seawater through the fresh water generator to save the ship's fresh water resources and ensure the ship's propulsion water.

[0047] Since the fresh water production of one fresh water maker can no longer meet the navigation needs of the ship, an additional fresh water maker is needed to increase the fresh water production. However, the flow and heat of the main engine jacket water cannot provide heat source for two fresh water makers at the same time, and it is impossible to ensure that the two fresh water makers can operate at the same time.

[0048] To solve the above problems, Figure 1 As shown, this embodiment discloses a waste heat recovery system, which uses the waste heat of cooling water flowing out of the air cooler 1 to provide energy for the additional fresh water generator 2, so as to ensure the stable operation of the fresh water generator 2 and improve the seawater desalination capacity of the ship.

[0049] Specifically, the waste heat recovery system includes an air cooler 1, a circulation pump 3 and a fresh water generator 2. The air cooler 1 has a first inlet 11 and a circulation port 12. The water inlet end of the circulation pump 3 can be communicated with the fresh water cooling system 100, and the water outlet end of the circulation pump 3 is communicated with the first inlet 11, so that the cooling water in the fresh water cooling system 100 enters the air cooler 1 through the circulation pump 3. One end of the fresh water generator 2 is communicated with the circulation port 12, and the other end is communicated with the water inlet end of the circulation pump 3.

[0050] In this embodiment, the cooling water in the air cooler 1 is circulated into the fresh water generator 2 by the circulating pump 3, and the waste heat of the cooling water provides energy for the fresh water generator 2 to make fresh water, thereby improving the desalination capacity of the ship. At the same time, the waste heat of the cooling water in the air cooler 1 is fully utilized to save energy consumption.

[0051] It should be noted that the above-mentioned fresh water cooling system 100 is a general cooling system on a ship. The temperature of the cooling water in the fresh water cooling system 100 increases after passing through the air cooler 1 , and the high-temperature cooling water can provide energy to the fresh water generator 2 .

[0052] like Figure 1 As shown, the waste heat recovery system also includes an inlet pipe 50 and an outlet pipe 60 . The cooling water of the fresh water cooling system 100 flows into the air cooler 1 through the inlet pipe 50 , and the cooling water that has completed cooling flows back to the fresh water cooling system 100 through the outlet pipe 60 .

[0053] It should be noted that, since the energy required by a fresh water generator 2 is limited, when the waste heat recovery system is working normally, only part of the cooling water needs to be circulated between the air cooler 1 and the fresh water generator 2 through the circulation pump 3.

[0054] The air cooler 1 of this embodiment also has a second inlet 13 and a return port 14. The water inlet pipeline 50 includes a first branch pipe 501 and a second branch pipe 502, one end of the first branch pipe 501 is connected to the fresh water cooling system 100, and the other end is connected to the water inlet end of the circulation pump 3. One end of the second branch pipe 502 is connected to the fresh water cooling system 100, and the other end is connected to the second inlet 13 of the air cooler 1. One end of the water outlet pipeline 60 is connected to the fresh water cooling system 100, and the other end is connected to the return port 14. The cooling water in the first branch pipe 501 is defined as primary cooling water, and the cooling water in the second branch pipe 502 is defined as secondary cooling water. It is only necessary to circulate the primary cooling water between the air cooler 1 and the fresh water generator 2 through the circulation pump 3.

[0055] Specifically, the cooling water of the fresh water cooling system 100 is divided into primary cooling water and secondary cooling water in the water inlet pipe 50. The primary cooling water flows into the air cooler 1 through the circulation pump 3 and the first inlet 11 in sequence, and flows out from the circulation port 12 to the fresh water generator 2. The secondary cooling water flows into the air cooler 1 through the second inlet 13, and flows back to the fresh water cooling system 100 from the return port 14.

[0056] like Figure 1 As shown, in order to accurately control the flow of the primary cooling water and the secondary cooling water, the waste heat recovery system further includes a first flow valve 6 and a second flow valve 7. The first flow valve 6 is connected and installed in the first branch pipe 501 to control the flow of the cooling water in the first branch pipe 501. The second flow valve 7 is connected and installed in the second branch pipe 502 to control the flow of the cooling water in the second branch pipe 502.

[0057] like Figure 1 As shown, the waste heat recovery system further includes a first circulation pipeline 10 and a second circulation pipeline 20, one end of the first circulation pipeline 10 is connected to the circulation port 12, and the other end is connected to one end of the fresh water generator 2. One end of the second circulation pipeline 20 is connected to the other end of the fresh water generator 2, and the other end is connected to the water inlet end of the circulation pump 3.

[0058] Specifically, the circulating pump 3 pumps the primary cooling water into the air cooler 1 through the first inlet 11, and the primary cooling water with increased temperature flows from the circulating port 12 into the first circulating pipeline 10, and enters the fresh water generator 2 to provide energy. Then the primary cooling water flows from the fresh water generator 2 into the second circulating pipeline 20, and re-enters the air cooler 1 through the circulating pump 3, completing the circulation process of the primary cooling water.

[0059] It should be noted that the temperature of the primary cooling water flowing out of the circulation port 12 of the air cooler 1 needs to be maintained between 90°C and 92°C to ensure the normal operation of the primary cooling water. The first setting value of this embodiment is 90°C, and the second setting value is 92°C.

[0060] like Figure 1 As shown, a first three-way valve 4 is installed in the second circulation pipeline 20, and the first three-way valve 4 has a first port A, a second port B and a third port C. When the primary cooling water circulates normally, the first port A is connected to the third port C, and the first port A and the third port C are both connected to the second circulation pipeline 20. The second port B is closed and connected to the first circulation pipeline 10.

[0061] When the temperature of the cooling water (primary cooling water) flowing out of the circulation port 12 is lower than the first set value (90°C), the second port B is opened at a set opening to communicate with the third port C. As a result, part of the primary cooling water in the first circulation pipeline 10 directly enters the second circulation pipeline 20 through the second port B and the third port C, thereby neutralizing the primary cooling water flowing out of the fresh water generator 2, so as to increase the temperature of the primary cooling water in the second circulation pipeline 20, thereby increasing the temperature of the primary cooling water flowing out of the circulation port 12.

[0062] like Figure 1 As shown, the waste heat recovery system also includes a second three-way valve 5, and the second three-way valve 5 has a fourth port D, a fifth port E and a sixth port F. The fifth port E is connected to the sixth port F, the fifth port E is connected to the first branch pipe 501, and the sixth port F is connected to the water outlet pipeline 60. When the primary cooling water circulates normally, the fourth port D remains closed and is connected to the second circulation pipeline 20. The primary cooling water can flow back to the water outlet pipeline 60 through the fifth port E and the sixth port F of the second three-way valve 5.

[0063] When the temperature of the cooling water flowing out of the circulation port 12 is higher than the second set value (92°C), the fourth port D is opened at a set opening to be connected with the sixth port F, so that the cooling water in the second circulation pipeline 20 can flow back to the outlet pipeline 60 through the fourth port D and the sixth port F of the second three-way valve 5, thereby bypassing part of the primary cooling water in the second circulation pipeline 20.

[0064] It should be noted that when the fresh water generator 2 operates normally, the first flow valve 6 remains closed to stabilize the flow of primary cooling water between the fresh water generator 2 and the air cooler 1. When part of the primary cooling water is bypassed, the first flow valve 6 can be opened to replenish the bypassed water to the fresh water generator 2.

[0065] When the fresh water generator 2 fails or is under maintenance, in order to ensure that the primary cooling water circulates stably between the first circulation pipeline 10 and the second circulation pipeline 20, the waste heat recovery system further includes a third circulation pipeline 30 and a first circulation holding valve 8. One end of the third circulation pipeline 30 is connected to the first circulation pipeline 10, and the other end can be connected to the first port A of the first three-way valve 4. The first circulation holding valve 8 is connected and installed in the third circulation pipeline 30. When the fresh water generator 2 is shut down, the first circulation holding valve 8 is opened so that the primary cooling water passes through the first circulation pipeline 10, the third circulation pipeline 30 and the second circulation pipeline 20 in sequence, and then flows back to the air cooler 1 through the circulation pump 3.

[0066] like Figure 1 As shown, a plurality of circulating pumps 3 are provided, and one or more of the plurality of circulating pumps 3 can be selectively turned on or off. Specifically, there are two circulating pumps 3 in the present embodiment, and the two circulating pumps 3 are arranged in parallel. The primary cooling water in the first branch pipe 501 or the second circulation pipeline 20 can enter the air cooler 1 through a circulating pump 3, and the other circulating pump 3 is used as a backup, thereby realizing the redundant setting of the circulating pump 3 and improving the reliability of the circulating pump 3. When the flow rate of the primary cooling water is large, the two circulating pumps 3 can also be turned on at the same time to increase the processing capacity and flow rate of the primary cooling water, thereby increasing the energy provided by the primary cooling water to meet the energy consumption demand of the fresh water generator 2. Of course, the number of circulating pumps 3 can also be three or more than four.

[0067] When the fresh water generator 2 is not needed to make fresh water, the circulation pump 3 remains closed to save energy. In order to maintain the stable circulation of the primary cooling water in the fresh water cooling system 100, the waste heat recovery system also includes a fourth circulation pipeline 40 and a second circulation maintaining valve 9. At this time, the second port B of the first three-way valve 4 is connected to the third port C, and the fourth port D of the second three-way valve 5 is connected to the sixth port F. One end of the fourth circulation pipeline 40 is connected to the first inlet 11 of the air cooler 1, and the other end can be connected to the first branch pipe 501. The second circulation maintaining valve 9 is connected and installed in the fourth circulation pipeline 40. When the circulation pump 3 is shut down, the second circulation maintaining valve 9 is opened.

[0068] Specifically, when the circulation pump 3 is turned off, the primary cooling water enters the air cooler 1 through the first branch pipe 501 of the outlet pipe 60 and the circulation pump 3. Then, the primary cooling water flows into the first circulation pipe 10 from the circulation port 12 of the air cooler 1, and flows into the first circulation pipe 10 after passing through the second port B and the third port C of the first three-way valve 4 in sequence. Finally, the primary cooling water flows into the outlet pipe 60 after passing through the fourth port D and the sixth port F of the second three-way valve 5, and finally flows back to the fresh water cooling system 100.

[0069] This embodiment also discloses a ship, which adopts the above waste heat recovery system, and circulates the cooling water in the air cooler 1 into the fresh water generator 2 through the circulating pump 3, so that the waste heat of the cooling water provides energy for the fresh water generator 2 to make fresh water, thereby improving the fresh water making capacity of the ship. At the same time, the waste heat of the cooling water of the air cooler 1 is fully utilized to save energy consumption.

[0070] Specifically, the ship provides energy for two fresh water generators 2 for desalination through the main engine jacket water and waste heat recovery system, which greatly improves the ship's seawater desalination capacity and meets the needs of safe operation of the ship.

[0071] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A waste heat recovery system, characterized in that: include: An air cooler (1) having a first inlet (11) and a circulation port (12); a circulation pump (3), wherein a water inlet end of the circulation pump (3) is capable of being communicated with a fresh water cooling system (100), and a water outlet end of the circulation pump (3) is communicated with the first inlet (11), so that cooling water in the fresh water cooling system (100) enters the air cooler (1) through the circulation pump (3); and A fresh water generator (2), one end of the fresh water generator (2) being connected to the circulation port (12), and the other end of the fresh water generator (2) being connected to the water inlet end of the circulation pump (3); The air cooler cooling water waste heat recovery system also includes: A first circulation pipeline (10), one end of the first circulation pipeline (10) being connected to the circulation port (12), and the other end of the first circulation pipeline (10) being connected to one end of the fresh water generator (2); a second circulation pipeline (20), one end of the second circulation pipeline (20) being connected to the other end of the fresh water generator (2), and the other end of the second circulation pipeline (20) being connected to the water inlet end of the circulation pump (3); and A first three-way valve (4) having a first port, a second port and a third port; the first port is communicated with the third port and both are communicated with the second circulation pipeline (20); the second port is closed and is communicated with the first circulation pipeline (10); the first three-way valve (4) is configured to be able to open the second port at a set opening to communicate with the third port when the temperature of the cooling water flowing out of the circulation port (12) is lower than a first set value; The waste heat recovery system further comprises: a third circulation pipeline (30), one end of which is in communication with the first circulation pipeline (10), and the other end of which is capable of being in communication with the first port of the first three-way valve (4); and a first circulation maintaining valve (8), which is installed in communication with the third circulation pipeline (30) and is configured to open when the fresh water generator (2) is shut down; A water inlet pipeline (50), comprising a first branch pipe (501), one end of the first branch pipe (501) being connected to the fresh water cooling system (100), and the other end of the first branch pipe (501) being connected to the water inlet end of the circulation pump (3); A water outlet pipeline (60), the air cooler (1) further comprising a return port (14), one end of the water outlet pipeline (60) being in communication with the fresh water cooling system (100), and the other end of the water outlet pipeline (60) being in communication with the return port (14); and The second three-way valve (5) has a fifth port and a sixth port; the fifth port is connected to the sixth port, the fifth port is connected to the first branch pipe (501), and the sixth port is connected to the water outlet pipeline (60).

2. The waste heat recovery system according to claim 1, characterized in that: The second three-way valve (5) also has a fourth port, which remains closed and is connected to the second circulation pipeline (20); the second three-way valve (5) is configured to be able to open the fourth port at a set opening to communicate with the sixth port when the temperature of the cooling water flowing out of the circulation port (12) is higher than a second set value.

3. The waste heat recovery system according to claim 1, characterized in that: The waste heat recovery system further comprises: The first flow valve (6) is installed in communication with the first branch pipe (501) to control the flow of cooling water in the first branch pipe (501).

4. The waste heat recovery system according to claim 1, characterized in that: The water inlet pipeline (50) further comprises a second branch pipe (502), the air cooler (1) further comprises a second inlet (13), one end of the second branch pipe (502) is in communication with the fresh water cooling system (100), and the other end of the second branch pipe (502) is in communication with the second inlet (13) of the air cooler (1); The waste heat recovery system further comprises a second flow valve (7), wherein the second flow valve (7) is connected and installed in the second branch pipe (502) to control the flow of cooling water in the second branch pipe (502).

5. The waste heat recovery system according to claim 1, characterized in that: The waste heat recovery system further comprises: a fourth circulation pipeline (40), one end of the fourth circulation pipeline (40) being in communication with the first inlet (11) of the air cooler (1), and the other end of the fourth circulation pipeline (40) being capable of being in communication with the first branch pipe (501); The second port of the first three-way valve (4) is in communication with the third port, and the fourth port of the second three-way valve (5) is in communication with the sixth port; and The second circulation maintaining valve (9) is installed in communication with the fourth circulation pipeline (40) and is configured to open when the circulation pump (3) is stopped.

6. The waste heat recovery system according to claim 1, characterized in that: A plurality of the circulation pumps (3) are provided, and one or more of the plurality of circulation pumps (3) can be selectively opened or closed.

7. A ship, characterized in that: A waste heat recovery system comprising the waste heat recovery system according to any one of claims 1 to 6.

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