Flue gas waste heat recovery equipment for offshore petroleum project

Abstract

The utility model provides flue gas waste heat recovery equipment for an offshore oil project, which relates to the technical field of waste heat recovery and comprises an outer shell, a bearing positioning piece and a locking piece, a heat exchange tube is arranged in the outer shell, and a sealing plate is detachably arranged at the top end of the outer shell. The bearing positioning piece comprises a first connecting part and a second connecting part which are detachably connected, the first connecting part is fixed to the bottom end of the heat exchange tube, and the second connecting part is fixed to the bottom of the interior of the outer shell. When the heat exchange tubes are installed, the heat exchange tubes can be placed in from top to bottom, the supporting strips on the lower end face of the supporting plate are correspondingly embedded into the positioning grooves correspondingly formed in the upper end faces of the supporting strips, meanwhile, the bottom ends of the heat exchange tubes can be embedded into the embedding grooves till the heat exchange tubes are erected in the erecting grooves, installation is convenient, meanwhile, stability of the heat exchange tubes can be effectively guaranteed, and the heat exchange tubes are not prone to falling off. And during follow-up cleaning of the heat exchange tubes, the heat exchange tubes can be rapidly detached, and convenience and trouble saving are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery, in particular to a flue gas waste heat recovery device for offshore oil projects. Background Art

[0002] Waste heat recovery is the process of using waste heat generated from industrial processes or other activities to generate energy or for other purposes. This method not only improves energy efficiency and reduces energy waste, but also helps reduce operating costs and greenhouse gas emissions. Waste heat recovery has a wide range of applications in different fields.

[0003] Offshore oil fields refer to oil and gas fields located in the ocean, which are usually located on the continental shelf or in deeper waters. Offshore oil development usually refers to activities such as oil exploration, mining, storage and transportation carried out in the ocean. The development and production of these oil fields require special facilities and technologies. Offshore oil field flue gas refers to the waste gas generated during offshore oil field operations, especially after burning fuel (usually diesel, heavy oil or natural gas) in power stations, heating furnaces or other combustion equipment. These waste gases contain a large amount of heat, and a part of them is discharged into the atmosphere in the form of high-temperature flue gas. Direct discharge of high-temperature flue gas will cause a large amount of heat energy waste, so most of the waste heat recovery equipment will be installed to recycle and utilize heat energy.

[0004] The current flue gas waste heat recovery equipment exchanges heat with cold water through high-temperature flue gas at the same time, so that the cold water is heated, thereby reducing the energy consumption of subsequent heating of cold water and reducing heat energy waste. However, the current flue gas waste heat recovery equipment mostly has heat exchange tubes for cold water to pass through set in the heat exchanger. The heat exchange tubes are mostly fixed in the heat exchanger shell by bolts or fixed welding. Since the high-temperature flue gas contains solid impurities, after a period of time, a layer of covering will adhere to the outer wall of the heat exchange tube, which will affect the heat exchange effect. At this time, it is necessary to disassemble the heat exchanger shell to clean the outer wall of the heat exchange tube. Since the heat exchange tube is not easy to disassemble and assemble, cleaning is more troublesome. Utility Model Content

[0005] In order to solve the above deficiencies in the prior art, the utility model proposes a flue gas waste heat recovery device for offshore oil projects.

[0006] The technical solution of the present utility model is achieved as follows:

[0007] A flue gas waste heat recovery device for offshore oil projects includes an outer shell, a flue gas inlet hopper and a flue gas outlet hopper are symmetrically mounted at both ends of the outer shell, a heat exchange tube is arranged inside the outer shell, and a sealing plate is detachably provided at the top end of the outer shell. The device also includes:

[0008] A supporting and positioning member, the supporting and positioning member comprising a first connecting portion and a second connecting portion that are detachably connected, the first connecting portion being fixed to the bottom end of the heat exchange tube, and the second connecting portion being fixed to the bottom of the outer shell;

[0009] A locking piece, one end of which is connected to the upper end surface of the sealing plate, and the sealing plate is used to lock the sealing plate after the sealing plate is installed.

[0010] Preferably, the first connecting portion includes a supporting plate, the supporting plate is fixed to the lower end surface of the heat exchange tube, and a plurality of positioning blocks are fixed to the lower end surface of the supporting plate at equal intervals;

[0011] The second connecting part includes a supporting bar fixed to the inner bottom of the outer shell, and a plurality of positioning grooves are equidistantly formed on the upper end surface of the supporting bar, and the positioning blocks are inserted and matched with the positioning grooves.

[0012] Preferably, the locking member comprises:

[0013] Two fixing blocks, the two fixing blocks are symmetrically fixed to one end of the upper end surface of the sealing plate, and a clamping plate is hinged between the two fixing blocks;

[0014] A convex strip, the convex strip being fixed to the upper end of the outer shell and being capable of passing through the card plate;

[0015] The limiting pin can pass through the clamping plate in a direction perpendicular to the convex strip.

[0016] Preferably, the top end of the heat exchange tube is connected to a drain pipe, and the bottom end of the heat exchange tube is connected to a water inlet pipe.

[0017] Preferably, the upper end surface of the water inlet pipe is provided with an embedding groove for embedding the bottom end of the heat exchange tube, and the bottom end of the embedding groove is provided with a lap groove that matches the bottom end of the heat exchange tube.

[0018] Preferably, a plurality of smoke guide plates are provided in the smoke inlet hopper from top to bottom.

[0019] Preferably, the smoke guide plates at the upper and lower ends are arranged at an angle.

[0020] Preferably, a heat pipe bundle is provided inside the outer shell and outside the heat exchange tube.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. When the utility model is in use, through the arrangement of the supporting positioning parts, the embedding grooves and the bridging grooves, when installing the heat exchange tubes, the heat exchange tubes can be placed from top to bottom, so that the multiple supporting bars on the lower end surface of the support plate are correspondingly embedded in the positioning grooves opened correspondingly on the upper end surface of the supporting bars, and at the same time, the bottom ends of the heat exchange tubes can be embedded in the embedding grooves until they are laid in the bridging grooves. This facilitates installation and can effectively ensure the stability of the heat exchange tubes. When cleaning the heat exchange tubes later, they can be quickly removed, which is more convenient and saves trouble.

[0023] 2. When the utility model is in use, through the setting of the sealing plate and the locking piece, after the heat exchange tube is installed, the sealing plate cover can be set on the top of the outer shell, and then the clamping plate between the two fixed blocks is rotated to make the convex strip pass through the clamping plate, and finally the limit pin is passed through the clamping plate to limit the position. It is more convenient and can ensure the stability of the sealing plate installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 This is a structural diagram of the supporting and positioning member of the utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the support bar of the utility model;

[0028] Figure 4 This is a schematic cross-sectional view of the water inlet pipe of the utility model;

[0029] Figure 5 This is a schematic structural diagram of the locking member of the utility model.

[0030] In the figure: 1. Outer shell; 2. Smoke inlet hopper; 3. Smoke outlet hopper; 4. Closing plate;

[0031] 5. Locking piece; 51. Fixing block; 52. Clamping plate; 53. Raised strip; 54. Limit pin;

[0032] 6. Supporting and positioning member; 61. Support bar; 62. Support plate; 63. Positioning block; 64. Positioning groove;

[0033] 7. Heat exchange tube;

[0034] 8. Water inlet pipe; 81. Embedded groove; 82. Laying groove;

[0035] 9. Drain pipe; 10. Smoke guide plate; 11. Heat pipe bundle. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] The utility model provides Figure 1-Figure 5 The shown embodiment is a flue gas waste heat recovery device for offshore oil projects, comprising an outer shell 1, with flue gas inlet hoppers 2 and flue gas outlet hoppers 3 symmetrically installed at both ends of the outer shell 1, a waste discharge hole installed at the bottom end of the outer shell 1 and close to one end of the flue gas inlet hopper 2, and a sealing door installed at the waste discharge hole. By opening the sealing door, the flue gas impurities inside the outer shell 1 can be discharged, and a heat exchange pipe 7 is provided inside the outer shell 1, the top end of the heat exchange pipe 7 is connected to a drain pipe 9, and the bottom end of the heat exchange pipe 7 is connected to a water inlet pipe 8. A sealing plate 4 is detachably provided at the top end of the outer shell 1, and by opening the sealing plate 4, the heat exchange pipe 7 can be lifted up and removed for cleaning. A heat pipe bundle 11 is provided inside the outer shell 1 and on the periphery of the heat exchange pipe 7. The heat pipe bundle 11 is a heat transfer element that transfers heat through the phase change of its internal working fluid. The heated side of the heat pipe bundle 11 absorbs exhaust heat and transfers it to the working fluid (liquid) within the tube. After absorbing heat, the working fluid evaporates and boils, transforming into steam. Under the action of the pressure difference, the steam rises to the heat release side and condenses into liquid, releasing latent heat of vaporization. The heat is transferred to the cold fluid on the heat release side. The condensed liquid flows back to the heated side by gravity. Because the interior of the heat pipe bundle 11 is evacuated, the working fluid evaporates and boils easily. The heat pipe bundle 11 starts up quickly and has extremely high thermal conductivity. The heat pipe bundle 11 is fixed to the heat exchange tube 7, so when the heat exchange tube 7 is removed, the heat pipe bundle 11 can also be removed.

[0038] See Figure 4 As shown, the upper end surface of the water inlet pipe 8 is provided with an embedding groove 81 for the bottom end of the heat exchange tube 7 to be embedded, and the bottom end of the embedding groove 81 is provided with a lap groove 82 that matches the bottom end of the heat exchange tube 7.

[0039] Specifically, when the heat exchange tube 7 is installed from the upper end, the bottom end of the heat exchange tube 7 can be embedded in the embedding groove 81 until it is installed in the bridging groove 82.

[0040] See Figure 1As shown, a plurality of smoke guide plates 10 are provided in the smoke inlet 2 from top to bottom, and the smoke guide plates 10 at the upper and lower ends are tilted. After the high-temperature smoke enters the smoke inlet 2, the smoke can be evenly guided into the outer shell 1 through the smoke guide plates 10, thereby improving the heat exchange effect of the cold water in the heat exchange tube 7.

[0041] See Figure 1 and Figure 3 As shown, the flue gas waste heat recovery equipment for offshore oil projects also includes a supporting positioning member 6 and a locking member 5. The supporting positioning member 6 includes a first connecting part and a second connecting part that can be detachably connected. The first connecting part is fixed to the bottom end of the heat exchange tube 7, and the second connecting part is fixed to the bottom of the outer shell 1. One end of the locking member 5 is connected to the upper end surface of the sealing plate 4, and the sealing plate 4 is used to lock after the sealing plate 4 is installed. When installing the heat exchange tube 7, in addition to embedding the bottom end of the heat exchange tube 7 into the embedding groove 81, the first connecting part and the second connecting part can also be connected together to ensure that the heat exchange tube 7 is installed accurately.

[0042] Among them, in the specific implementation of the present utility model, refer to Figure 2 and Figure 3 As shown, the first connecting part includes a supporting plate 62, which is fixed to the lower end surface of the heat exchange tube 7, and a plurality of positioning blocks 63 are fixed to the lower end surface of the supporting plate 62 at equal intervals;

[0043] In the specific implementation of the present invention, see Figure 2 and Figure 3 As shown, the second connecting part includes a support bar 61 fixed to the bottom of the inner part of the outer shell 1, and a plurality of positioning grooves 64 are equidistantly provided on the upper end surface of the support bar 61. A positioning block 63 is inserted into a corresponding positioning groove 64. After the positioning block 63 is fully embedded in the positioning groove 64, the bottom end of the heat exchange tube 7 can be completely embedded in the embedding groove 81.

[0044] In the specific implementation of the present invention, see Figure 5 As shown, the locking member 5 includes:

[0045] Two fixing blocks 51, the two fixing blocks 51 are symmetrically fixed to one end of the upper end surface of the sealing plate 4, and a clamping plate 52 is hinged between the two fixing blocks 51;

[0046] The convex strip 53 is fixed to the upper end of the outer shell 1 and can pass through the clamping plate 52;

[0047] The limiting pin 54 can pass through the clamping plate 52 in a direction perpendicular to the protruding strip 53 .

[0048] There are preferably at least two or four locking members 5 , which are symmetrically distributed to lock the sealing plate 4 from both sides.

[0049] Through the above technical solution:

[0050] When installing the heat exchange tube 7, the heat exchange tube 7 can be placed from top to bottom, so that the multiple support bars 61 on the lower end surface of the support plate 62 are correspondingly embedded in the positioning grooves 64 opened correspondingly on the upper end surface of the support bars 61, and the bottom end of the heat exchange tube 7 is embedded in the embedding groove 81, which makes installation convenient and can effectively ensure the stability of the heat exchange tube 7.

[0051] After the heat exchange tube 7 is installed, the sealing plate 4 can be placed on the top of the outer shell 1, and then the clamping plate 52 between the two fixing blocks 51 can be rotated to make the protrusion 53 pass through the clamping plate 52, and finally the limiting pin 54 can be passed through the clamping plate 52 for limiting. This can ensure the stability of the installation of the sealing plate 4, and when cleaning the heat exchange tube 7 later, it can be quickly removed, which is more convenient and saves trouble.

[0052] Among them, the limit pin 54 can be inclined to penetrate the card plate 52, and preferably the insertion end is higher than the exit end, so that after the limit pin 54 penetrates the card plate 52, the head end of the limit pin 54 is low and the tail end is high, making it difficult to move out under the action of gravity, thereby increasing the stability of the limit pin 54.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A flue gas waste heat recovery device for an offshore oil project, comprising an outer shell (1), a flue gas inlet hopper (2) and a flue gas outlet hopper (3) symmetrically mounted at both ends of the outer shell (1), and a heat exchange tube (7) disposed inside the outer shell (1), characterized in that: The top end of the outer shell (1) is detachably provided with a sealing plate (4), and further comprises: A supporting positioning member (6), the supporting positioning member (6) comprising a first connecting portion and a second connecting portion that are detachably connected, the first connecting portion being fixed to the bottom end of the heat exchange tube (7), and the second connecting portion being fixed to the inner bottom of the outer shell (1); A locking member (5), one end of which is connected to the upper end surface of the sealing plate (4), and the sealing plate (4) is used for locking after the sealing plate (4) is installed.

2. The flue gas waste heat recovery equipment for offshore oil projects according to claim 1, characterized in that: The first connecting portion includes a supporting plate (62), the supporting plate (62) is fixed to the lower end surface of the heat exchange tube (7), and a plurality of positioning blocks (63) are fixed to the lower end surface of the supporting plate (62) at equal intervals; The second connecting portion comprises a support bar (61) fixed to the inner bottom of the outer shell (1); a plurality of positioning grooves (64) are equidistantly formed on the upper end surface of the support bar (61); and the positioning blocks (63) are inserted and matched with the positioning grooves (64).

3. The flue gas waste heat recovery equipment for offshore oil projects according to claim 1 is characterized in that: The locking member (5) comprises: Two fixing blocks (51), the two fixing blocks (51) are symmetrically fixed to one end of the upper end surface of the sealing plate (4), and a clamping plate (52) is hinged between the two fixing blocks (51); A convex strip (53), wherein the convex strip (53) is fixed to the upper end of the outer shell (1), and the convex strip (53) can pass through the clamping plate (52); A limiting pin (54) can penetrate the clamping plate (52) in a direction perpendicular to the convex strip (53).

4. The flue gas waste heat recovery equipment for offshore oil projects according to claim 1, characterized in that: The top end of the heat exchange tube (7) is connected to a drain pipe (9), and the bottom end of the heat exchange tube (7) is connected to a water inlet pipe (8).

5. The flue gas waste heat recovery equipment for offshore oil projects according to claim 4 is characterized in that: The upper end surface of the water inlet pipe (8) is provided with an embedding groove (81) for embedding the bottom end of the heat exchange pipe (7), and the bottom end of the embedding groove (81) is provided with a lap groove (82) that matches the bottom end of the heat exchange pipe (7).

6. The flue gas waste heat recovery equipment for offshore oil projects according to claim 1, characterized in that: A plurality of smoke guide plates (10) are provided in the smoke inlet hopper (2) from top to bottom.

7. The flue gas waste heat recovery equipment for offshore oil projects according to claim 6, characterized in that: The smoke guide plates (10) at the upper and lower ends are arranged tilted.

8. The flue gas waste heat recovery equipment for offshore oil projects according to claim 1, characterized in that: A heat pipe bundle (11) is provided inside the outer shell (1) and on the periphery of the heat exchange tube (7).

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