A multi-stage heat exchange and cooling energy-saving treatment system for waste mineral oil

Abstract

The utility model discloses a kind of waste mineral oil multistage heat exchange and cooling energy-saving treatment systems, comprising: sheet structure, and the connecting structure being set on sheet structure, sheet structure includes: connecting sheet, and the fixed sheet being set on the both sides of connecting sheet;Connecting sheet is used to communicate whole equipment to let waste mineral oil flow in interior heat exchange, fixed sheet is used to adjust self spacing to place different quantity of connecting sheet according to the demand of heat exchange amount;Connecting structure includes connecting pipe, and the socket being set in the opening of connecting pipe;Inlet side thin wall of socket is unevenly arranged to generate turbulent flow in the process of waste mineral oil flow;Connecting structure is respectively set on connecting sheet and fixed sheet, and connecting structure is used to splice connecting sheet and fixed sheet;Further, the mixing effect improves overall heat exchange uniformity and heat conduction efficiency, makes waste mineral oil cooling process more stable and efficient, reduces heat loss.

Description

Technical Field

[0001] This utility model relates to the field of multi-stage heat exchange, and more particularly to a multi-stage heat exchange and cooling energy-saving treatment system for waste mineral oil. Background Technology

[0002] In the fields of petrochemicals, machinery manufacturing, and industrial lubrication, the efficient regeneration and treatment of waste mineral oil is of great significance for resource recycling and environmental protection. A multi-stage heat exchange and cooling energy-saving treatment system for waste mineral oil serves as a typical solution, achieving tiered energy utilization through a series heat exchange structure: the system first utilizes the waste heat from high-temperature purified oil to preheat the raw waste oil in multiple stages, and then cools the treated finished oil to a safe storage temperature through a staged cooling unit, significantly reducing external heating energy consumption and cooling medium consumption. In this system, plate heat exchangers, due to their compact structure and high heat transfer efficiency, are widely used as the core unit in the multi-stage heat exchange process, achieving main heat recovery through counter-current heat exchange between alternating plates.

[0003] However, the connection structure of existing plate heat exchangers has design limitations. Traditional inlets employ a smooth, uniform, thin-walled flow channel design, which easily leads to laminar flow of waste mineral oil. This results in uneven temperature distribution within the oil, causing thermodynamic stratification where localized high-temperature regions (exacerbating the risk of oil cracking) and low-temperature regions (reducing heat transfer efficiency) coexist. This temperature gradient not only weakens the overall heat transfer uniformity but also hinders the achievement of system energy-saving goals due to ineffective heat loss.

[0004] Therefore, it is necessary to improve an existing multi-stage heat exchange and cooling energy-saving treatment system for waste mineral oil to solve the above problems. Summary of the Invention

[0005] This invention overcomes the shortcomings of the prior art and provides a multi-stage heat exchange and cooling energy-saving treatment system for waste mineral oil, aiming to solve the problems in the prior art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A multi-stage heat exchange and cooling energy-saving treatment system for waste mineral oil, comprising: a plate structure, and a connecting structure disposed on the plate structure. The plate structure includes: connecting plates and fixed plates disposed on both sides of the connecting plates; the connecting plates are used to connect the entire equipment to allow waste mineral oil to flow and exchange heat inside, and the fixed plates are used to adjust their spacing to accommodate different numbers of connecting plates according to the heat exchange requirements. The connection structure includes a connecting pipe and a socket located at the opening of the connecting pipe; the thin wall inside the socket is unevenly arranged to generate turbulence during the flow of waste mineral oil.

[0007] In a preferred embodiment of the present invention, the connecting structure is respectively disposed on the connecting plate and the fixing plate, and the connecting structure is used to splice the connecting plate and the fixing plate together.

[0008] In a preferred embodiment of the present invention, the connecting plate and the fixing plate are provided with a plurality of connecting holes, which are threaded holes for threaded connection with the connecting structure.

[0009] In a preferred embodiment of the present invention, the connecting plate is arranged in a straight plate shape, and the fixing plate is arranged in an L-shaped plate shape.

[0010] In a preferred embodiment of the present invention, fixing holes are evenly provided around the connecting plate and the fixing plate, and threaded rods are provided at the fixing holes, with nuts provided at both ends of the threaded rods.

[0011] In a preferred embodiment of the present invention, the connecting pipe includes a connecting straight pipe and a connecting bend, and the insertion port is opened at one end of the connecting straight pipe and the connecting bend.

[0012] In a preferred embodiment of the present invention, the inner wall cross-section of the inlet of the connecting straight pipe is triangular.

[0013] In a preferred embodiment of the present invention, the connecting bend is arranged in an arc shape and is used to connect adjacent connecting straight pipes in sequence.

[0014] In a preferred embodiment of the present invention, the socket is respectively transitionally fitted with the connecting straight pipe and the connecting bend pipe.

[0015] This utility model solves the defects existing in the background technology, and has the following beneficial effects: This invention provides a multi-stage heat exchange and cooling energy-saving treatment system for waste mineral oil. By using a triangular design with uneven thickness on the inner thin wall of the connecting pipe inlet, turbulence is generated at the interface when the waste mineral oil flows through. This turbulence mechanism promotes the mixing of the inner layer, outer layer, and subsequent oil flow, ensuring a more uniform heat distribution. Compared with the existing heat exchanger inlet design with smooth and uniform flow channels, this optimization avoids local overheating or unevenness caused by temperature stratification. Furthermore, this mixing effect improves the overall heat exchange uniformity and heat conduction efficiency, making the waste mineral oil cooling process more stable and efficient, and reducing heat loss.

[0016] This invention provides a multi-stage heat exchange and cooling energy-saving treatment system for waste mineral oil. By fixing different numbers of connecting plates with threaded rods and nuts, the heat exchange area can be flexibly adjusted according to the increase or decrease in the amount of waste mineral oil processed. When the pump power increases, leading to an increase in the flow rate of waste mineral oil, adding connecting plates can extend the oil flow path and time, thereby maintaining efficient heat exchange. Conversely, reducing the number of plates avoids resource waste. Compared with existing fixed heat exchangers, the latter are difficult to respond to real-time changes in processing volume, often resulting in insufficient heat exchange or increased energy consumption due to changes in flow rate. Furthermore, this adaptive capability ensures that the system is always operating at peak efficiency, reducing energy waste, and is particularly suitable for handling environments with fluctuating loads.

[0017] This invention provides a multi-stage heat exchange and cooling energy-saving treatment system for waste mineral oil. By providing threaded connection holes on both the connecting and fixing plates, and using inserts and threaded rods for secure connection, modular assembly of the equipment is achieved. In case of blockage or scaling, users can easily disassemble each plate for cleaning or component replacement. Compared to the fixed welded structure of existing welded plate heat exchangers, this design eliminates the complexity and time consumption of welding and disassembly, significantly shortening the maintenance cycle. Furthermore, this detachable feature reduces equipment downtime, improves overall operational continuity, and avoids heat exchange efficiency degradation due to scale accumulation. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a perspective structural diagram of a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of the connecting straight pipe connection structure of a preferred embodiment of this utility model; In the diagram: 1. Plate structure; 2. Connecting structure; 3. Connecting plate; 4. Fixing plate; 5. Connecting straight pipe; 6. Connecting bent pipe; 7. Rotating ring. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0020] As shown in the figure, a multi-stage heat exchange and cooling energy-saving treatment system for waste mineral oil includes: a plate structure 1, and a connecting structure 2 disposed on the plate structure 1. The plate structure 1 includes: a connecting plate 3, and fixed plates 4 disposed on both sides of the connecting plate 3; the connecting plate 3 is used to connect the whole equipment to allow waste mineral oil to flow and exchange heat inside, and the fixed plates 4 are used to adjust their spacing according to the heat exchange requirements to place different numbers of connecting plates 3. The connection structure 2 includes a connecting pipe and a socket disposed at the opening of the connecting pipe; the thin wall inside the socket is unevenly disposed to generate turbulence during the flow of waste mineral oil.

[0021] It should be noted that this device uses connecting structures 2 on connecting plates 3 and fixed plates 4 respectively, and then inserts connecting plates 3 and fixed plates to form a fixed structure. Waste mineral oil is then subjected to multi-stage heat exchange through this device, thus converting the welded plate heat exchanger into a plug-in plate heat exchanger. This allows for direct disassembly and cleaning / replacement when blockage occurs or internal scaling needs to be cleaned. Furthermore, this device uses connecting plates 3 inserted between two fixed plates 4 and fixed by threaded rods. This allows the device to add or remove connecting plates 3 according to the amount of heat exchange, thus always achieving the highest working efficiency. In the connecting structure 2, by setting uneven inner walls of the insertion port, when the waste mineral oil flows through the interface during heat exchange, turbulence is generated under the impact of the waste mineral oil, which then mixes with the subsequent waste mineral oil and the waste mineral oil in the inner and outer layers, making the temperature of the waste mineral oil more uniform and achieving a better heat exchange effect.

[0022] The plate structure 1 includes: a connecting plate 3, and fixed plates 4 disposed on both sides of the connecting plate 3; the connecting plate 3 is used to connect the whole equipment to allow waste mineral oil to flow and exchange heat inside, and the fixed plates 4 are used to adjust their spacing according to the heat exchange requirements to place different numbers of connecting plates 3. In a preferred embodiment of the present invention, the connecting structure 2 is respectively disposed on the connecting plate 3 and the fixing plate 4, and the connecting structure 2 is used to splice the connecting plate 3 and the fixing plate 4.

[0023] In a preferred embodiment of the present invention, the connecting plate 3 and the fixing plate 4 are provided with a plurality of connecting holes, which are threaded holes for threaded connection with the connecting structure 2.

[0024] In a preferred embodiment of the present invention, the connecting plate 3 is arranged in a straight plate shape, and the fixing plate 4 is arranged in an L-shaped plate shape.

[0025] In a preferred embodiment of the present invention, fixing holes are evenly provided around the connecting plate 3 and the fixing plate 4, and threaded rods are provided at the fixing holes, with nuts provided at both ends of the threaded rods.

[0026] It should be noted that the plate structure 1 includes connecting plates 3 and fixing plates 4. Only two fixing plates 4 are provided, while the connecting plates 3 can be added or reduced according to the amount of waste mineral oil to be processed. Several connecting holes are provided on both the fixing plates 4 and the connecting plates 3. The connecting holes on the connecting plates 3 are threaded holes for threaded connection with connecting pipes. A rotating ring 7 is rotatably connected to the connecting holes on the fixing plates 4. A threaded groove is provided on the inner circumference of the rotating ring 7, which can also be threadedly connected to the connecting pipe. Fixing holes are provided around the connecting plates 3 and the fixing plates 4, and threaded rods are installed in the fixing holes. During use, the waste mineral oil to be processed... When the increase in mineral oil increases the pump power, the top fixing plate 4 is removed, and the number of connecting plates 3 is increased through the connecting structure 2. This increases the time that the waste mineral oil stays in the plate heat exchanger of this application, thereby enhancing the heat exchange effect and avoiding the situation where the heat exchange effect decreases due to the increase in pumping speed. At the same time, when the amount of waste mineral oil to be processed reduces the pump power, the connecting plates 3 are removed, and the scale inside the removed connecting plates 3 is cleaned so that they can be directly installed when needed later. Finally, the fixing plate 4 is placed on top, and the entire fixing plate 4 and connecting plate 3 on the equipment are fixedly connected by the connection of the nut and the threaded rod.

[0027] The connection structure 2 includes a connecting pipe and a socket disposed at the opening of the connecting pipe; the thin wall inside the socket is unevenly disposed to generate turbulence during the flow of waste mineral oil.

[0028] In a preferred embodiment of the present invention, the connecting pipe includes a straight connecting pipe 5 and a bent connecting pipe 6, and the insertion port is opened at one end of the straight connecting pipe 5 and the bent connecting pipe 6.

[0029] In a preferred embodiment of the present invention, the inner wall cross-section at the insertion port of the connecting straight pipe 5 is triangular.

[0030] In a preferred embodiment of the present invention, the connecting bend 6 is arranged in an arc shape and is used to connect adjacent connecting straight pipes 5 in sequence.

[0031] In a preferred embodiment of the present invention, the socket is transitionally fitted with the connecting straight pipe 5 and the connecting bent pipe 6 respectively.

[0032] It should be noted that the connecting pipe includes a straight connecting pipe 5 and a bent connecting pipe 6. The straight connecting pipe 5 is threaded to the connecting hole of the connecting plate 3, and the bent connecting pipe 6 is threaded to the rotating ring 7 on the connecting hole of the fixing plate 4. One end of the straight connecting pipe 5 and the bent connecting pipe 6 has a socket on its inner circumference, and the other end is thin-walled. The thin wall and the socket can be transitionally fitted, and the dimensional tolerance is 0. The straight connecting pipe 5 is not a vertical pipe, but is sloped, so that the end without a socket can be inserted into the socket of the straight connecting pipe 5 on the adjacent connecting plate 3.

[0033] During use, the connecting straight pipe 5 is threaded onto the connecting plate 3, and the connecting bent pipe 6 is threaded onto the rotating ring 7 on the fixed plate 4. The fixed plate 4 is then placed at the bottom of the threaded rod, and then the connecting plates 3 are placed in sequence so that the end of the connecting straight pipe 5 on the adjacent connecting plates 3 without a spigot is inserted into the end with a spigot. Finally, the fixed plate 4 is placed on top to connect each connecting straight pipe 5, thus forming a plate heat exchanger. The connecting straight pipes 5 at the two symmetrical ends located on the fixed plate 4 are used as the inlet and outlet of the waste mineral oil, respectively. Heat exchange is achieved by introducing waste mineral oil.

[0034] During the connection process of the straight pipe 5, the bend pipe 6, the connecting plate 3, and the fixing plate 4, the straight pipe 5 is only threaded onto the connecting plate 3. The fixing plate 4 is divided into a fixing plate 4 located at the top of the equipment and a fixing plate 4 located at the bottom. The fixing plate 4 located at the bottom is also only threaded onto the bend pipe 6, but the fixing plate 4 located at the top is threaded onto both the bend pipe 6 and the straight pipe 5. The function of the bend pipe 6 is to connect all the straight pipes 5 on all the connecting plates 3. During the connection process, two connecting holes are left at the two obliquely symmetrical corners of the top fixing plate 4. These connecting holes connect to the straight pipe 5 and are connected to the external pump for transporting waste mineral oil, so that the waste mineral oil flows into the equipment for heat exchange and finally flows out from the connecting hole at the other end.

[0035] During the flow of waste mineral oil in the pipeline, the end of the connecting straight pipe 5 with the spigot has a right-angled triangle cross-section on the inner wall of the spigot's inner circumference, with the hypotenuse of the right-angled triangle forming the inner wall. The inner wall of the connecting straight pipe 5 with the spigot gradually contracts towards the end without the spigot, with the contracted portion accounting for one-tenth of the total length of the connecting straight pipe 5. When the waste mineral oil flows through this point, turbulence is formed, mixing with the waste mineral oil in the inner layer and behind it. Through continuous mixing, the heat exchange becomes more uniform.

[0036] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A multi-stage heat exchange and cooling energy-saving treatment system for waste mineral oil, comprising: A plate structure (1), and a connecting structure (2) disposed on the plate structure (1), characterized in that, The plate structure (1) includes: a connecting plate (3) and a fixing plate (4) disposed on both sides of the connecting plate (3); the fixing plate (4) is used to adjust its spacing to accommodate different numbers of the connecting plates (3) according to the heat exchange requirements. The connection structure (2) includes a connecting pipe and a socket disposed at the opening of the connecting pipe; the thin wall inside the socket is unevenly distributed.

2. The multi-stage heat exchange and cooling energy-saving treatment system for waste mineral oil according to claim 1, characterized in that: The connecting structure (2) is respectively disposed on the connecting plate (3) and the fixing plate (4), and the connecting structure (2) is formed by splicing the connecting plate (3) and the fixing plate (4).

3. The multi-stage heat exchange and cooling energy-saving treatment system for waste mineral oil according to claim 1, characterized in that: The connecting plate (3) and the fixing plate (4) are provided with a number of connecting holes, which are threaded holes that are threaded to the connecting structure (2).

4. The multi-stage heat exchange and cooling energy-saving treatment system for waste mineral oil according to claim 1, characterized in that: The connecting plate (3) is arranged in a straight plate shape, and the fixing plate (4) is arranged in an L-shaped plate shape.

5. The multi-stage heat exchange and cooling energy-saving treatment system for waste mineral oil according to claim 1, characterized in that: The connecting plate (3) and the fixing plate (4) are evenly provided with fixing holes around their perimeters. A threaded rod is provided at each fixing hole, and a nut is provided at both ends of the threaded rod.

6. The multi-stage heat exchange and cooling energy-saving treatment system for waste mineral oil according to claim 1, characterized in that: The connecting pipe includes a connecting straight pipe (5) and a connecting bend pipe (6), and the socket is opened at one end of the connecting straight pipe (5) and the connecting bend pipe (6).

7. The multi-stage heat exchange and cooling energy-saving treatment system for waste mineral oil according to claim 6, characterized in that: The inner wall cross-section of the inlet of the connecting straight pipe (5) is triangular.

8. The multi-stage heat exchange and cooling energy-saving treatment system for waste mineral oil according to claim 6, characterized in that: The connecting bend (6) is arc-shaped and is used to connect adjacent connecting straight pipes (5) in sequence.

9. The multi-stage heat exchange and cooling energy-saving treatment system for waste mineral oil according to claim 6, characterized in that: The sockets are respectively fitted with the connecting straight pipe (5) and the connecting bent pipe (6).

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