A deep-sea mining plume sedimentation-promoting device and method utilizing equipment waste heat

Abstract

The present invention discloses a deep-sea mining plume sedimentation-promoting device and method utilizing waste heat of equipment, the deep-sea mining plume sedimentation-promoting device comprising a ore collecting box, a heat exchanger, a tail flow discharge port and a hydraulic oil tank; a ore collecting box is provided with a ore particle collecting net box and an axial flow pump, the ore particle collecting net box is used to separate ore particles; the axial flow pump is used to drive a mixed low-temperature tail flow of seawater and sediment to enter a coolant inlet of a heat exchanger through an outlet of the ore collecting box, a hydraulic oil tank is connected to the bottom of the heat exchanger, and two coolant outlets of the heat exchanger are connected to a pair of tail flow discharge ports; the heat exchanger of the present invention can directly cool down high-temperature hydraulic oil, thereby improving the heat dissipation efficiency of the hydraulic system from the root; in addition, the bent pipeline, the baffle ring plate and the baffle disc plate inside the heat exchanger shell can extend the length of the coolant flow channel, further enhance the convective heat transfer effect, and ensure that the hydraulic oil can be fully cooled down.

Description

Technical Field

[0001] The invention belongs to the technical field of equipment for accelerating the settling of tailwater plumes in deep-sea mining, and in particular relates to a device and method for accelerating the settling of deep-sea mining plumes by utilizing waste heat of equipment. Background Art

[0002] The bottom of the ocean is rich in mineral resources, which are of many types, large reserves and high grade, and have great prospects for development and utilization.

[0003] Marine environmental pollution is an important bottleneck restricting the commercialization of deep-sea mining. The plumes generated by mineral particle collection, track walking and tail flow discharge during deep-sea mining have a long diffusion time and a wide impact area, which seriously affects the deep-sea ecological environment. Currently, plume suppression technology is still in the initial exploration stage.

[0004] Deficiencies of existing technologies: 1. Existing technologies rarely address the problem of overheating of hydraulic systems of deep-sea mining equipment. Currently, hydraulic systems generally rely on the limited outer surface of the oil tank to conduct convection heat exchange with seawater, which has low heat dissipation efficiency and will cause the system to break down if it runs for too long. 2. Most of the existing technologies for promoting plume sedimentation involve relatively complex mechanisms, which may lead to numerous failures and difficult implementation. 3. Most of the existing devices for promoting plume sedimentation require additional energy input to drive, such as electricity. The increased energy consumption is not conducive to maintaining long-term seabed mining operations; 4. Existing technologies generally assume that deep-sea mining equipment is in the form of a single wake discharge port, resulting in a high wake discharge velocity and a large diffusion range. Summary of the invention

[0005] The present invention provides a deep-sea mining plume sedimentation-promoting device and method utilizing waste heat of equipment, so as to solve the overheating problem of the hydraulic system of deep-sea mining equipment and reduce the influence of the tail water plume discharged by the mining equipment during deep-sea mining on the seabed environment.

[0006] To solve the above problems, the technical solution provided by the present invention is as follows:

[0007] The embodiment of the present invention provides a deep-sea mining plume sedimentation-promoting device utilizing equipment waste heat, comprising a collection box (1), a heat exchanger (2), a tail flow discharge port (3) and a hydraulic oil tank (4); the collection box (1) is provided with a ore particle collection net box (1-1) and an axial flow pump (1-2); the ore particle collection net box (1-1) is used to separate ore particles; the axial flow pump (1-2) is used to drive a mixed low-temperature tail flow of seawater and sediment in the collection box (1) to enter a coolant inlet (2-1) of the heat exchanger (2) through a collection box outlet (1-4); the bottom of the heat exchanger (2) is connected to the hydraulic oil tank (4); two coolant outlets (2-2) of the heat exchanger (2) are connected to a pair of tail flow discharge ports (3); the pair of tail flow discharge ports (3) are a pair of discharge ports with an inward-contracting angle and a gradually outward-expanding diameter, and are used to control the discharge of the coolant tail flow inside the heat exchanger (2).

[0008] In an optional embodiment of the present invention, the heat exchanger (2) comprises a heat exchanger shell (2-3), a pipe box (2-4) is arranged at the bottom of the heat exchanger shell (2-3), and a baffle ring plate (5), two baffle plates (6), a heat exchange tube, a first longitudinal baffle (7-1), a second longitudinal baffle (7-2) and a third longitudinal baffle (7-3) are arranged inside the heat exchanger shell (2-3).

[0009] In an optional embodiment of the present invention, the baffle ring plate (5) is located above the pipe box (2-4), the baffle ring plate (5) is a grooved plate, two symmetrical circular openings are provided on the baffle ring plate (5), and the two baffle disc plates (6) are located directly above the two circular openings.

[0010] In an optional embodiment of the present invention, the heat exchange tube has a plurality of groups of bent pipelines, each group of bent pipelines (8) includes a first vertical portion (8-1), a first semicircular portion (8-2), a second vertical portion (8-3), a second semicircular portion (8-4), a third vertical portion (8-5), a third semicircular portion (8-6) and a fourth vertical portion (8-7) connected in sequence; the bottom of the first vertical portion (8-1) is connected to the hydraulic oil inlet (2-5) on the left side of the pipe box (2-4), and the bottom of the fourth vertical portion (8-7) is connected to the hydraulic oil outlet (2-6) on the right side of the pipe box (2-4).

[0011] In an optional embodiment of the present invention, the bottom of the first longitudinal partition (7-1) is fixed on the left side of the pipe box (2-4), and after passing through a circular through hole, its top is arranged to abut against the first semicircular portion (8-2); the second longitudinal partition (7-2) is fixed on the baffle ring plate (5), and its bottom is arranged to abut against the second semicircular portion (8-4); the bottom of the third longitudinal partition (7-3) is fixed on the right side of the pipe box (2-4), and after passing through another circular through hole, its top is arranged to abut against the third semicircular portion (8-6).

[0012] In an optional embodiment of the present invention, the two baffle plates (6) are each provided with a plurality of hollow holes, the first vertical portion (8-1) and the second vertical portion (8-3) are arranged through the hollow holes on one of the baffle plates (6), and the third vertical portion (8-5) and the fourth vertical portion (8-7) are arranged through the hollow holes on the other of the baffle plates (6).

[0013] The embodiment of the present invention further provides a deep-sea mining plume sedimentation promotion method using waste heat of equipment, which is implemented by a deep-sea mining plume sedimentation promotion device using waste heat of equipment in the above embodiment, and includes the following steps:

[0014] Step 1, high-temperature hydraulic oil is driven from the inside of the hydraulic oil tank (4) into the pipe box (2-4), and enters the multiple groups of bent pipes of the heat exchange tube from the hydraulic oil inlet (2-5) on the left side of the pipe box (2-4), and at the same time, the axial flow pump (1-2) in the ore collecting box (1) drives the mixed low-temperature tail flow of seawater and sediment to enter the coolant inlet (2-1) of the heat exchanger (2) through the ore collecting box outlet (1-4);

[0015] Step 2, inside the heat exchanger shell (2-3), the low-temperature tail flow is in full contact with the heat exchange tube to transfer the heat energy of the hydraulic oil. Multiple groups of bent pipes, baffle ring plates (5), two baffle plates (6) and longitudinal partitions play a role in extending the length of the low-temperature tail flow channel, increasing the flow velocity between pipes, and increasing the degree of turbulence. After the hydraulic oil is cooled, it flows back to the hydraulic oil tank (4) through the hydraulic oil outlet (2-6) on the right side of the pipe box (2-4). The heated tail flow flows out from the coolant outlet (2-2) of the heat exchanger (2) and induces counter-emission through a pair of connected tail flow discharge ports (3).

[0016] Compared with the prior art, the embodiments of the present invention provide a deep-sea mining plume sedimentation-promoting device and method using the waste heat of the equipment, which has the following beneficial effects:

[0017] (1) The heat dissipation efficiency of the hydraulic system is significantly improved. The multiple sets of curved pipes of the heat exchanger effectively increase the heat dissipation area of ​​the hydraulic system. The high-speed and high-turbulence coolant provides a better heat dissipation environment for the heat exchanger. Taking into account the surface heat dissipation of the hydraulic oil tank itself, the three factors effectively ensure that the temperature of the hydraulic system can be maintained within a reasonable range.

[0018] (2) The tailwater plume has a smaller diffusion range. The tailwater is heated up before being discharged. When its initial kinetic energy is consumed, the sediment particles inside will flocculate and settle more quickly. At the same time, the momentum reduction discharge reduces the overall kinetic energy of the tailwater, which not only reduces the shear strength of the tailwater, but also increases the concentration of sediment particles inside the tailwater near the discharge port in a short period of time, which is conducive to more and earlier flocculation and settlement, thereby reducing the diffusion range.

[0019] (3) The deep-sea mining plume sedimentation-promoting device has low energy consumption and turns waste into treasure. It cleverly utilizes the kinetic energy generated by the axial flow pump in the mining box and the thermal energy of the hydraulic system. Compared with some existing sedimentation-promoting devices, it does not require additional energy input and energy conversion process, thus improving energy utilization and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A schematic structural diagram of a deep-sea mining plume-promoting sedimentation device utilizing equipment waste heat provided in an embodiment of the present application.

[0022] Figure 2 A structural front view of a deep-sea mining plume-promoting sedimentation device that utilizes waste heat from equipment provided in an embodiment of the present application.

[0023] Figure 3 An internal cross-sectional view of a deep-sea mining plume-promoted sedimentation device that utilizes waste heat from the equipment, provided in an embodiment of the present application.

[0024] Figure 4 A schematic diagram of the heat exchanger shell structure of a deep-sea mining plume sedimentation-promoting device that utilizes equipment waste heat provided in an embodiment of the present application.

[0025] Figure 5 A schematic diagram of the internal structure of a heat exchanger for a deep-sea mining plume sedimentation-promoting device utilizing waste heat from equipment provided in an embodiment of the present application.

[0026] Figure 6A schematic diagram of the heat exchange tube structure inside a heat exchanger provided in an embodiment of the present application.

[0027] Figure 7 A schematic diagram of the heat exchange implementation of a deep-sea mining plume sedimentation-promoting device that utilizes equipment waste heat provided in an embodiment of the present application.

[0028] Figure 8 A flow chart of a method for promoting sedimentation of deep-sea mining plumes by utilizing waste heat from equipment provided in an embodiment of the present application. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of the present invention provides a deep-sea mining plume sedimentation-promoting device utilizing the waste heat of the equipment, including a collecting box 1, a heat exchanger 2, a tail flow discharge port 3, and a hydraulic oil tank 4. A ore collecting box 1 is provided with a ore particle collection net box 1-1 and an axial flow pump 1-2, and the ore particle collection net box 1-1 is used to separate ore particles. The axial flow pump 1-2 is used to drive the mixed low-temperature tail flow of seawater and sediment in the collecting box 1 to enter the coolant inlet 2-1 of the heat exchanger 2 through the collecting box outlet 1-4. The coolant inlet 2-1 of the heat exchanger 2 of this embodiment is connected to the collecting box outlet 1-4, and the low-temperature, high-speed tail flow discharged from the collecting box 1 is directly used to cool the hydraulic oil. The collecting box inlet 1-3 is provided on the left side of the collecting box 1.

[0031] The bottom of the heat exchanger 2 is connected to a hydraulic oil tank 4, which uses the high-speed low-temperature tail flow discharged from the ore box to cool the hydraulic oil and transfer the heat to the tail flow. The two coolant outlets 2-2 of the heat exchanger 2 are connected to a pair of tail flow discharge ports 3, which are a pair of discharge ports with inward-contracted angles and gradually expanded outwards, and are used to control the discharge of the coolant tail flow inside the heat exchanger 2 to achieve momentum reduction discharge of the high-temperature tail flow.

[0032] like Figure 4 , Figure 5 and Figure 6As shown, the heat exchanger 2 includes a heat exchanger shell 2-3, a tube box 2-4 is arranged at the bottom of the heat exchanger shell 2-3, and a baffle plate 5, two baffle plates 6, heat exchange tubes, a first longitudinal baffle plate 7-1, a second longitudinal baffle plate 7-2 and a third longitudinal baffle plate 7-3 are arranged inside the heat exchanger shell 2-3. The baffle plate 5 is located above the tube box 2-4, the baffle plate 5 is a groove-shaped plate, and two symmetrical circular openings are arranged on the baffle plate 5, and the two baffle plates 6 are located directly above the two circular openings.

[0033] like Figure 5 and Figure 6 As shown, the heat exchange tube has multiple groups of bent pipelines, and each group of bent pipelines 8 includes a first vertical portion 8-1, a first semicircular portion 8-2, a second vertical portion 8-3, a second semicircular portion 8-4, a third vertical portion 8-5, a third semicircular portion 8-6 and a fourth vertical portion 8-7 which are connected in sequence; the bottom of the first vertical portion 8-1 is connected to the hydraulic oil inlet 2-5 on the left side of the pipe box 2-4, and the bottom of the fourth vertical portion 8-7 is connected to the hydraulic oil outlet 2-6 on the right side of the pipe box 2-4.

[0034] The bottom of the first longitudinal partition 7-1 is fixed on the left side of the pipe box 2-4, and after passing through a circular through hole, its top is set in contact with the first semicircular part 8-2; the second longitudinal partition 7-2 is fixed on the deflector ring plate 5, and its bottom is set in contact with the second semicircular part 8-4; the bottom of the third longitudinal partition 7-3 is fixed on the right side of the pipe box 2-4, and after passing through another circular through hole, its top is set in contact with the third semicircular part 8-6.

[0035] The two deflector plates 6 are both provided with a plurality of hollow holes, the first vertical portion 8-1 and the second vertical portion 8-3 pass through the hollow holes on one of the deflector plates 6, and the third vertical portion 8-5 and the fourth vertical portion 8-7 pass through the hollow holes on the other deflector plate 6.

[0036] like Figure 6 and Figure 7 As shown, the heat exchanger 2 uses a multi-section U-tube heat exchange tube to solve the problem of overheating of the hydraulic system. The internal flow channel of the heat exchange tube has a large flow area, good heat transfer performance, and can work under high pressure. Compared with simply relying on the heat dissipation of the outer surface of the oil tank, the heat exchanger can directly cool the high-temperature hydraulic oil and improve the heat dissipation efficiency of the hydraulic system from the root. In addition, the baffle ring plate and baffle plate inside the heat exchanger shell can also extend the length of the coolant flow channel, increase the turbulence turbulence, further enhance the convective heat transfer effect, and ensure that the hydraulic oil can be fully cooled.

[0037] The deep-sea mining plume settling device uses thermal energy to promote plume settling. According to relevant studies, the flocculation effect between sediment particles in the plume will be significantly enhanced under high temperature conditions, and the sediment particles will flocculate into larger particle groups, and the settling speed will be accelerated. The deep-sea mining plume settling device uses the low-temperature tail flow discharged from the ore collecting box as a coolant, so that it is fully in contact with the high-temperature hydraulic oil pipeline inside the heat exchanger shell. According to the principle of heat conduction, the temperature of the tail flow will continue to rise. After the tail flow is fully heated and discharged, it is conducive to its earlier flocculation and sedimentation, reducing the diffusion range. In addition, the energy of the axial flow pump is cleverly used to drive the low-temperature tail flow into the heat exchanger, without the need to install a special coolant drive pump; the waste heat of the hydraulic oil is used to promote the plume heating, flocculation, and sedimentation, avoiding additional energy consumption, such as the electrolytic sedimentation device requires additional continuous power supply.

[0038] The deep-sea mining plume settling promotion device is an integrated device with functions such as cooling hydraulic oil temperature, promoting plume settling, and controlling low-speed discharge of wake. Through reasonable design and layout, the realization of the overall function is concentrated inside the heat exchanger, wherein the processes of cooling the hydraulic oil and heating the wake are both carried out inside the shell of the heat exchanger, and the wake discharge port is directly connected to the coolant outlet of the heat exchanger. The device is compact, low in complexity, concentrated and complete in functions, simple to operate, and has a low probability of failure, and is adaptable to the harsh environment of deep-sea maintenance.

[0039] The deep-sea mining plume sedimentation-promoting device adopts a double wake discharge port, and connects a pair of gradually expanding discharge ports at the coolant outlet of the heat exchanger. Compared with a single discharge port, according to the principle of flow conservation, a reasonable setting of the discharge port diameter can reduce the initial longitudinal kinetic energy of the wake. At the same time, the discharge angles of the two discharge pipes are inwardly contracted to form an acute angle, which can reduce the horizontal lateral kinetic energy by inducing the two wake flows to offset each other. The reduction of the overall kinetic energy can reduce the diffusion range of the plume and reduce the impact on the deep-sea environment.

[0040] refer to Figure 8 The embodiment of the present invention further provides a method for accelerating the settling of deep-sea mining plumes by utilizing the waste heat of equipment, which is realized by a deep-sea mining plume accelerating the settling of deep-sea mining plumes by utilizing the waste heat of equipment in the above embodiment, and includes the following steps:

[0041] Step 1, high-temperature hydraulic oil is driven from the inside of the hydraulic oil tank 4 to the pipe box 2-4, and enters the multiple groups of curved pipes of the heat exchange tube from the hydraulic oil inlet 2-5 on the left side of the pipe box 2-4. At the same time, the axial flow pump 1-2 in the ore collecting box 1 drives the mixed low-temperature tail flow of seawater and sediment to enter the coolant inlet 2-1 of the heat exchanger 2 through the ore collecting box outlet 1-4.

[0042] Step 2, inside the heat exchanger shell 2-3, the low-temperature tail flow is in full contact with the heat exchange tube to transfer the heat energy of the hydraulic oil. Multiple groups of bent pipelines, baffle ring plates 5, two baffle plates 6 and longitudinal partitions play a role in extending the length of the low-temperature tail flow channel, increasing the flow velocity between tubes, and increasing the degree of turbulence. After the hydraulic oil is cooled, it flows back to the hydraulic oil tank 4 through the hydraulic oil outlet 2-6 on the right side of the pipe box 2-4. The heated tail flow flows out from the coolant outlet 2-2 of the heat exchanger 2 and induces counter-emission through a pair of connected tail flow discharge ports 3.

[0043] The deep-sea mining plume sedimentation-promoting device and method utilizing equipment waste heat of the present invention have the following innovative features:

[0044] Innovation 1: Clever use of heat exchange: During deep-sea mining operations, the temperature of the hydraulic oil inside the hydraulic system of the mining equipment will continue to rise, causing the equipment to be unable to operate continuously; the temperature of the tail flow discharged by the mining equipment is low, and the flocculation effect of the internal sediment particles is weak. If the tail flow is heated, the flocculation rate of the internal sediment particles can be increased, and the small-sized sediment particles gather to form large-sized particles, which can accelerate sedimentation and reduce the diffusion range of the tail flow. The deep-sea mining plume sedimentation promotion device of the present invention innovatively interactively designs the mining equipment's high-temperature cooling module (high-temperature hydraulic system) and the low-temperature heating module (tail flow discharge pipe) with a large contact area, and realizes the different modules through heat exchange to take what they need, and finally realizes the cooling of the hydraulic system and the heating and sedimentation of the tail flow, achieving both energy saving and environmental protection.

[0045] Innovation 2: Flattened design of the heat exchanger: The present invention utilizes multi-section U-shaped tube heat exchange tubes to dissipate heat from high-temperature hydraulic oil. The heat exchanger has a double tube pass, and with the internal baffle ring and two baffle plates, it can significantly increase the heat dissipation area of ​​the hydraulic system and the stroke of the coolant, ensuring that the hydraulic oil is fully cooled while more heat energy can be transferred to the wake. However, the heat exchange tubes of traditional vertical heat exchangers are relatively long and have more baffle rings. During the flow of the low-temperature wake of the coolant, it must overcome the obstacles of gravity and baffles, which will cause serious resistance problems and affect the discharge efficiency of the wake. The present invention transforms the inverted "U"-shaped heat exchange pipeline into an "m" shape, which does not significantly reduce the length of the heat exchange tube and the space inside the shell, but can also reduce the adverse effects of gravity on the low-temperature wake drive; at the same time, reducing the number of baffles is conducive to alleviating the water resistance problem generated during the wake discharge process and reducing the loss of discharge efficiency.

[0046] Innovation point 3: Dual discharge outlet momentum reduction discharge: In order to overcome the shortcomings of high initial momentum and long diffusion distance of the tail flow discharged by deep-sea mining equipment, the present invention provides a pair of trumpet-shaped discharge outlets, the diameter of which gradually expands, and the law of flow conservation can effectively reduce the discharge speed of the tail flow. At the same time, the discharge direction of the two discharge outlets is no longer directed directly behind the ore collecting vehicle. The angles of the two discharge outlets are inward, and the central axes intersect at an acute angle. By inducing the two tail flows to spray against each other, the initial diffusion kinetic energy is further reduced, which is beneficial for the sediment particles in the tail flow to exhaust their kinetic energy as soon as possible. At the same time, high temperature conditions are used to accelerate flocculation and sedimentation, thereby reducing the diffusion range of the plume.

[0047] In summary, although the present invention has been disclosed as above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A deep-sea mining plume settling device utilizing equipment waste heat, characterized in that: The invention comprises an ore collecting box (1), a heat exchanger (2), a tail flow discharge port (3) and a hydraulic oil tank (4); the ore collecting box (1) is provided with an ore particle collection net box (1-1) and an axial flow pump (1-2); the ore particle collection net box (1-1) is used to separate ore particles; the axial flow pump (1-2) is used to drive a mixed low-temperature tail flow of seawater and sediment in the ore collecting box (1) to enter the coolant inlet (2-1) of the heat exchanger (2) through the ore collecting box outlet (1-4); the bottom of the heat exchanger (2) is connected to the hydraulic oil tank (4); the two coolant outlets (2-2) of the heat exchanger (2) are connected to a pair of tail flow discharge ports (3); the pair of tail flow discharge ports (3) are a pair of discharge ports with an inward-contracting angle and a gradually outward-expanding diameter, and are used to control the discharge of the coolant tail flow inside the heat exchanger (2); The heat exchanger (2) comprises a heat exchanger shell (2-3), a pipe box (2-4) is arranged at the bottom of the heat exchanger shell (2-3), and a baffle ring plate (5), two baffle disc plates (6), a heat exchange tube, a first longitudinal baffle plate (7-1), a second longitudinal baffle plate (7-2) and a third longitudinal baffle plate (7-3) are arranged inside the heat exchanger shell (2-3); The baffle ring plate (5) is located above the pipe box (2-4), the baffle ring plate (5) is a grooved plate, two symmetrical circular openings are arranged on the baffle ring plate (5), and the two baffle disc plates (6) are located directly above the two circular openings; The heat exchange tube has a plurality of groups of bent pipelines, each group of bent pipelines (8) comprising a first vertical portion (8-1), a first semicircular portion (8-2), a second vertical portion (8-3), a second semicircular portion (8-4), a third vertical portion (8-5), a third semicircular portion (8-6) and a fourth vertical portion (8-7) connected in sequence; the bottom of the first vertical portion (8-1) is connected to a hydraulic oil inlet (2-5) on the left side of the pipe box (2-4), and the bottom of the fourth vertical portion (8-7) is connected to a hydraulic oil outlet (2-6) on the right side of the pipe box (2-4); The bottom of the first longitudinal partition (7-1) is fixed on the left side of the pipe box (2-4), and after passing through a circular through hole, its top is arranged to abut against the first semicircular portion (8-2); the second longitudinal partition (7-2) is fixed on the baffle ring plate (5), and its bottom is arranged to abut against the second semicircular portion (8-4); the bottom of the third longitudinal partition (7-3) is fixed on the right side of the pipe box (2-4), and after passing through another circular through hole, its top is arranged to abut against the third semicircular portion (8-6).

2. The deep-sea mining plume-promoting sedimentation device using equipment waste heat according to claim 1, characterized in that: The two baffle plates (6) are each provided with a plurality of hollow holes, the first vertical portion (8-1) and the second vertical portion (8-3) are arranged through the hollow holes on one of the baffle plates (6), and the third vertical portion (8-5) and the fourth vertical portion (8-7) are arranged through the hollow holes on the other of the baffle plates (6).

3. A method for accelerating the settling of deep-sea mining plumes by utilizing the waste heat of equipment, which is realized by a device for accelerating the settling of deep-sea mining plumes by utilizing the waste heat of equipment as claimed in any one of claims 1 to 2, characterized in that: The following steps are involved: Step 1, high-temperature hydraulic oil is driven from the inside of the hydraulic oil tank (4) into the pipe box (2-4), and enters the multiple groups of bent pipes of the heat exchange tube from the hydraulic oil inlet (2-5) on the left side of the pipe box (2-4), and at the same time, the axial flow pump (1-2) in the ore collecting box (1) drives the mixed low-temperature tail flow of seawater and sediment to enter the coolant inlet (2-1) of the heat exchanger (2) through the ore collecting box outlet (1-4); Step 2, inside the heat exchanger shell (2-3), the low-temperature tail flow is in full contact with the heat exchange tube to transfer the heat energy of the hydraulic oil. Multiple groups of bent pipes, baffle ring plates (5), two baffle plates (6) and longitudinal partitions play a role in extending the length of the low-temperature tail flow channel, increasing the flow velocity between pipes, and increasing the degree of turbulence. After the hydraulic oil is cooled, it flows back to the hydraulic oil tank (4) through the hydraulic oil outlet (2-6) on the right side of the pipe box (2-4). The heated tail flow flows out from the coolant outlet (2-2) of the heat exchanger (2) and induces counter-emission through a pair of connected tail flow discharge ports (3).

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