Energy-saving heat exchanger for petrochemical industry

Abstract

The utility model relates to the technical field of chemical production, and discloses an energy-saving heat exchanger for petrochemical industry, which comprises a heat exchanger body, an inner cavity of the heat exchanger body is divided into a first flow collecting cavity, a heat exchange cavity and a second flow collecting cavity, a heat exchange tube is arranged in the heat exchanger, and a scraper component is movably sleeved on an outer ring of the heat exchange tube. Every two adjacent scraper assemblies are connected through a ball screw, rotating gears are fixed to the two ends of each ball screw, a first power structure is arranged on the outer side of the first flow collecting cavity, and a second power structure is arranged on the outer side of the second flow collecting cavity. According to the energy-saving heat exchanger for the petrochemical industry, through the arrangement of the first power structure and the second power structure, fluid flowing energy can be converted into energy for driving the ball screw to rotate, so that the ball screw does not need to additionally consume energy when rotating, and the first power structure and the second power structure can alternately work; and therefore, the ball screw can alternately rotate in the forward and reverse directions, and the scraper assembly can conveniently clean impurities attached to the surfaces of the heat exchange pipes.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical production, in particular to an energy-saving heat exchanger for the petrochemical industry. Background Art

[0002] Heat exchangers are indispensable equipment for achieving heat exchange and transfer in the chemical production process. In the fields of petrochemicals, cryogenic refrigeration, air separation, seawater desalination, etc., it is often necessary to heat low-temperature fluids or cool high-temperature fluids. After searching, in the prior art, the authorized patent with application number CN202223394800.5 discloses a compact heat exchanger, including a heat exchange inlet: a plurality of arc-shaped heat exchangers are arranged in the heat exchange inlet, and the arc-shaped heat exchangers are distributed in a pin-shaped manner in the heat exchange inlet, each of the arc-shaped heat exchangers is integrally connected by a connecting plate, each of the arc-shaped heat exchangers is provided with a scraper assembly, a threaded rod is rotatably connected to the middle of the arc-shaped heat exchanger, and arc-shaped scrapers and other components are threaded through the outer side of the threaded rod.

[0003] The above scheme utilizes a scraper assembly to clean impurities adhered to the pipe, but the scraper assembly needs to be driven by a motor all the time during cleaning, resulting in the scraper assembly requiring a large amount of additional electrical energy consumption when in use, thereby increasing the energy loss of the heat exchanger. Based on this, the present application proposes an energy-saving heat exchanger. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides an energy-saving heat exchanger for the petrochemical industry, which solves the problem in the above background technology that when cleaning the pipes in the heat exchanger, additional electric energy needs to be consumed all the time, increasing the energy loss of the heat exchanger.

[0005] The utility model provides the following technical solutions: an energy-saving heat exchanger for the petrochemical industry, comprising a heat exchanger body, the inner cavity of the heat exchanger body being divided into a first manifold, a heat exchange cavity and a second manifold, a heat exchange tube being fixed in the inner cavity of the heat exchange cavity through a baffle, one end of the heat exchange tube extending into the inner cavity of the first manifold, and the other end of the heat exchange tube extending into the inner cavity of the second manifold; a scraper assembly is evenly and movably sleeved on the outer ring of the heat exchange tube, two adjacent scraper assemblies are connected by a ball screw, both ends of the ball screw extend to the outside of the heat exchanger body, and both ends of the ball screw are fixedly connected with a rotating gear;

[0006] A first power structure is provided on the outside of the first collecting chamber, and the first power structure includes a turbine 1, a first fluid inlet pipe 1 is fixed to the liquid inlet end of the turbine 1, a liquid outlet pipe 1 is fixed to the liquid outlet end of the turbine 1, the other end of the liquid outlet pipe 1 is fixedly connected to the liquid inlet end of the first collecting chamber, a first fluid inlet pipe 2 is fixed to the liquid inlet end of the first collecting chamber, a turbine blade is movably connected to the middle of the inner cavity of the turbine 1, a driving wheel is fixed to the middle of the turbine blade, and the driving wheel is meshed with a rotating gear close to the first collecting chamber; a second power structure is provided on the outside of the second collecting chamber, and the second power structure includes a turbine 2, a first fluid discharge pipe 1 is fixed to the liquid outlet end of the second collecting chamber, the other end of the first fluid discharge pipe 1 is fixedly connected to the liquid inlet end of the turbine 2, a liquid outlet pipe 2 is fixed to the liquid outlet end of the turbine 2, a first fluid discharge pipe 2 is fixed to the liquid outlet end of the second collecting chamber, another turbine blade is movably connected to the middle of the inner cavity of the turbine 2, another driving wheel is fixedly connected to the middle of the other turbine blade, and the other driving wheel is meshed with another rotating gear through a transmission gear.

[0007] Preferably, grooves adapted to the scraper assembly are provided on both sides of the baffle plate, and a scraper assembly is provided between two adjacent baffle plates.

[0008] Preferably, the structures of turbine one and turbine two are the same; a second fluid inlet pipe is fixed to one end of the heat exchange chamber close to the second collecting chamber, and a second fluid outlet pipe is fixed to the other end of the heat exchange chamber.

[0009] Preferably, one end of each of the first fluid inlet pipe 1, the first fluid inlet pipe 2, the first fluid outlet pipe 1 and the first fluid outlet pipe 2 is provided with an electric ball valve.

[0010] Preferably, a one-way valve is fixed in the inner cavity of the first liquid outlet pipe and the inner cavity of the second liquid outlet pipe.

[0011] Preferably, the transmission gear is movably connected to the heat exchanger body, and the transmission gear is meshed with another driving wheel and another rotating gear.

[0012] Preferably, the outer ring of the ball screw is threadedly connected with a ball nut, the scraper assembly is fixedly connected to the ball nut, the number of the ball nuts is the same as the number of the scraper assemblies, and the distance between two adjacent scraper assemblies is the same.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The energy-saving heat exchanger for the petrochemical industry can convert the energy of fluid flow into energy to drive the rotation of the ball screw through the arrangement of the first power structure and the second power structure, so that the ball screw does not need to consume additional energy when rotating, so that the heat exchanger has the function of energy saving, and when the ball screw rotates, the scraper assembly can move in the direction where the heat exchange tube is located. When the scraper assembly moves, it can scrape off impurities adhering to the surface of the heat exchange tube, thereby improving the heat exchange efficiency of the heat exchanger.

[0015] 2. The energy-saving heat exchanger used in the petrochemical industry can control the opening and closing of the pipeline connected thereto through the setting of the electric ball valve. The first power structure and the second power structure can work alternately, so that the ball screw can rotate alternately in forward and reverse directions, which is convenient for the scraper assembly to clean impurities adhering to the surface of the heat exchange tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view of the structure of the utility model;

[0017] Figure 2 The utility model structure Figure 1 Back diagram;

[0018] Figure 3 The utility model structure Figure 1 Schematic diagram from top view;

[0019] Figure 4 The utility model structure Figure 1 Internal schematic diagram;

[0020] Figure 5 This is a schematic diagram of the structural baffle of the utility model;

[0021] Figure 6 This is a schematic diagram of the interior of turbine 2 of the utility model structure.

[0022] In the figure: 1. heat exchanger body; 2. second fluid inlet pipe; 3. second fluid outlet pipe; 4. turbine one; 5. first fluid inlet pipe one; 6. first fluid inlet pipe two; 7. electric ball valve; 8. outlet pipe one; 9. ball screw; 10. rotating gear; 11. driving wheel; 12. first fluid outlet pipe two; 13. baffle; 14. groove; 15. scraper assembly; 16. transmission gear; 17. first fluid outlet pipe one; 18. outlet pipe two; 19. turbine two; 20. first collecting chamber; 21. second collecting chamber; 22. heat exchange tube; 23. turbine blade. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] The utility model provides an energy-saving heat exchanger for the petrochemical industry, comprising a heat exchanger body 1, the inner cavity of the heat exchanger body 1 is divided into a first collecting cavity 20, a heat exchange cavity and a second collecting cavity 21, a heat exchange tube 22 is fixed in the inner cavity of the heat exchange cavity through a baffle 13, one end of the heat exchange tube 22 extends into the inner cavity of the first collecting cavity 20, and the other end of the heat exchange tube 22 extends into the inner cavity of the second collecting cavity 21; a second fluid inlet tube 2 is fixed at one end of the heat exchange cavity close to the second collecting cavity 21, and a second fluid outlet tube 3 is fixed at the other end of the heat exchange cavity; it can be seen from the above description that the first fluid entering the first collecting cavity 20 can enter the heat exchange tube 22, the first fluid and the second fluid exchange heat in the heat exchange cavity, the second fluid after heat exchange is discharged through the second fluid outlet tube 3, and the first fluid after heat exchange is discharged through the second collecting cavity 21.

[0025] The outer ring of the heat exchange tube 22 is evenly and movably sleeved with a scraper assembly 15. Grooves 14 adapted to the scraper assembly 15 are provided on both sides of the baffle plate 13. A scraper assembly 15 is provided between two adjacent baffle plates 13. Through the setting of the groove 14, the scraper assembly 15 can be hidden when not in use, thereby reducing the influence of the scraper assembly 15 on the second fluid flowing in the heat exchange chamber.

[0026] Two adjacent scraper assemblies 15 are connected by a ball screw 9, and a ball nut is threadedly connected to the outer ring of the ball screw 9. The scraper assembly 15 is fixedly connected to the ball nut. The number of ball nuts is the same as the number of scraper assemblies, and the distance between two adjacent scraper assemblies 15 is the same. Through the setting of the ball screw 9, the rotation of the ball screw 9 can make the ball nut move in the direction where the ball screw 9 is located. When the ball nut moves, it can drive the scraper assembly 15 fixedly connected thereto to move. When the scraper assembly 15 moves, it can scrape off impurities adhering to the surface of the heat exchange tube 22, realize the cleaning of the heat exchange tube 22, ensure the heat exchange efficiency of the heat exchanger, and facilitate the use of the heat exchanger in the petrochemical industry and other industries.

[0027] Both ends of the ball screw 9 extend to the outside of the heat exchanger body 1 , and both ends of the ball screw 9 are fixedly connected with a rotating gear 10 , and the rotation of the rotating gear 10 can drive the ball screw 9 to rotate.

[0028] A first power structure is provided on the outer side of the first collecting chamber 20, and the first power structure includes a turbine 4, which is fixedly connected to the heat exchanger body 1, a first fluid inlet pipe 5 is fixed to the liquid inlet end of the turbine 4, a liquid outlet pipe 8 is fixed to the liquid outlet end of the turbine 4, and the other end of the liquid outlet pipe 8 is fixedly connected to the liquid inlet end of the first collecting chamber 20, a first fluid inlet pipe 26 is fixed to the liquid inlet end of the first collecting chamber 20, and an electric ball valve 7 is provided at one end of the first fluid inlet pipe 5 and the first fluid inlet pipe 26, a turbine blade 23 is movably connected to the middle part of the inner cavity of the turbine 4, a driving wheel 11 is fixed to the middle part of the turbine blade 23, and the driving wheel 11 is meshed with the rotating gear 10 close to the first collecting chamber 20.

[0029] It can be seen from the above description of the first power structure that the operation of the electric ball valve 7 can control the opening and closing of the first fluid inlet pipe 15 or the first fluid inlet pipe 26 connected thereto. When the first fluid to be exchanged enters the inner cavity of the turbine 4 through the first fluid inlet pipe 5, the first fluid can impact the turbine blades 23, causing the turbine blades 23 to rotate. The rotation of the turbine blades 23 drives the driving wheel 11 fixedly connected thereto to rotate, and the driving wheel 11 drives the ball screw 9 to rotate through the rotating gear 10 meshing therewith. That is, by utilizing the first power structure, the energy of the first fluid flow can be converted into energy to drive the ball screw 9 to rotate, so that the scraper assembly 15 does not need to consume additional electrical energy during the movement, thereby reducing the energy loss of the heat exchanger. At this time, the rotation direction of the rotating gear 10 is opposite to the rotation direction of the driving wheel 11. The first fluid can also directly enter the inner cavity of the first collecting chamber 20 through the first fluid inlet pipe 2 6. At this time, the driving wheel 11 will not drive the ball screw 9 to rotate, and a one-way valve is provided in the inner cavity of the liquid outlet pipe 1 8 to prevent the liquid in the first collecting chamber 20 from flowing back into the inner cavity of the turbine 1 4.

[0030] A second power structure is provided on the outside of the second manifold 21, and the second power structure includes a turbine 2 19, and the turbine 2 19 is fixedly connected to the heat exchanger body 1, and a first fluid discharge pipe 17 is fixed to the liquid outlet end of the second manifold 21, and the other end of the first fluid discharge pipe 17 is fixedly connected to the liquid inlet end of the turbine 2 19, and a liquid outlet pipe 2 18 is fixed to the liquid outlet end of the turbine 2 19, and a one-way valve is provided in the inner cavity of the liquid outlet pipe 2 18, and a first fluid discharge pipe 2 12 is fixed to the liquid outlet end of the second manifold 21, and the first fluid discharge pipe 17 is fixed to the liquid outlet end of the turbine 2 Another electric ball valve 7 is provided at one end of the pipe 17 and the first fluid discharge pipe 2 12. The structure of the turbine 1 4 is the same as that of the turbine 2 19. Another turbine blade 23 is movably connected to the middle of the inner cavity of the turbine 2 19. Another driving wheel 11 is fixedly connected to the middle of the other turbine blade 23. The other driving wheel 11 is meshed with another rotating gear 10 through a transmission gear 16. The transmission gear 16 is movably connected to the heat exchanger body 1, and the transmission gear 16 is meshed with both the other driving wheel 11 and the other rotating gear 10.

[0031] From the above description of the second power structure, it can be known that the discharged first fluid can be directly discharged through the first fluid discharge pipe 12, or the discharged first fluid enters the inner cavity of the turbine 19 through the first fluid discharge pipe 17 and is discharged through the liquid outlet pipe 18. When the discharged first fluid enters the inner cavity of the turbine 19, the other turbine blade 23 can rotate, and the other turbine blade 23 drives the other driving wheel 11 fixedly connected thereto to rotate, and the other driving wheel 11 drives the other rotating gear 10 to rotate through the transmission gear 16 meshing therewith. At this time, the rotation direction of the other rotating gear 10 is the same as the rotation direction of the other driving wheel 11, so that the ball screw 9 can achieve reverse rotation.

[0032] It can be seen from the above description that the coordinated use of the first power structure and the second power structure can realize the alternating forward and reverse rotation of the ball screw 9, and then the scraper assembly 15 can be repeatedly moved in the direction of the heat exchange tube 22, so that the scraper assembly 15 can clean the impurities adhering to the surface of the heat exchange tube 22. In addition, during the impurity cleaning process, the scraper assembly 15 uses the flow energy of the first fluid as the power source, so that the heat exchanger does not need to consume additional energy to control the movement of the scraper assembly 15. The heat exchanger only needs to provide additional electrical energy to the electric ball valve, thereby reducing the energy loss of the heat exchanger, so that the heat exchanger has an energy-saving function.

[0033] Among them, the electric ball valve involved in this application is the prior art, and the model of the electric ball valve can be Q911F-16. Technical personnel in this field understand its connection method. Through these personnel, all electrical components in this application are connected to their adapted power supplies through wires, and a suitable controller is selected according to actual conditions to meet the control requirements. The specific connection and control sequence are described below. The electrical connection is completed in a sequential working order between the electrical components. The detailed connection means are well known in the art. The following mainly introduces the working principle and process, and no longer explains the electrical control.

[0034] To summarize, when the present application is used, the first fluid enters the inner cavity of the first collecting cavity 20 through the first fluid inlet tube 26, the first fluid in the first collecting cavity 20 enters the heat exchange tube 22, and the second fluid enters the heat exchange cavity through the second fluid inlet tube 2. The first fluid and the second fluid exchange heat in the heat exchange cavity. After the heat exchange is completed, the first fluid enters the second collecting cavity 21 and is discharged through the first fluid discharge tube 2 12, and the second fluid is discharged through the second fluid discharge tube 3. If it is necessary to clean the impurities adhered to the surface of the heat exchange tube 22, when the first transmission structure is working, the two electric ball valves 7 in the first transmission structure are both working. The operation of the electric ball valve 7 makes the first fluid enter the inner cavity of the tube 1 5 in a smooth state, and the first fluid enters the inner cavity of the tube 2 6 in a closed state. At this time, the first fluid first enters the inner cavity of the turbine 1 4, then enters the first collecting cavity 20, and is finally discharged through the first fluid discharge pipe 2 12. When the first fluid enters the inner cavity of the turbine 1 4, it will impact the turbine blades 23, causing the turbine blades 23 to rotate. The rotation of the turbine blades 23 drives the driving wheel 11 fixedly connected thereto to rotate, and the driving wheel 11 drives the ball screw 9 to rotate through the rotating gear 10 meshing therewith, that is, by using the first power structure, the energy of the first fluid flow can be converted into energy to drive the ball screw 9 to rotate, so that the scraper assembly 15 does not need to consume additional electrical energy during the movement, thereby reducing the energy loss of the heat exchanger, and at this time, the rotation direction of the ball screw 9 is opposite to that of the driving wheel 11. If the second power structure is working, the two electric ball valves 7 in the second power structure are working. The operation of the two electric ball valves 7 makes the inner cavity of the first fluid discharge pipe 17 in a smooth state, and the inner cavity of the first fluid discharge pipe 2 12 in a closed state. At this time, the first fluid enters the heat exchanger body 1 through the first fluid inlet pipe 2 6, and then enters the inner cavity of the turbine 2 19 through the first fluid discharge pipe 17. The discharged first fluid impacts the other turbine blade 23, and the other turbine blade 23 drives the other driving wheel 11 fixedly connected thereto to rotate. The other driving wheel 11 drives the other rotating gear 10 to rotate through the transmission gear 16 meshing therewith. The other rotating gear 10 can drive the ball screw 9 to rotate. At this time, the rotation direction of the ball screw 9 is the same as the rotation direction of the other driving wheel 11. The coordinated use of the first transmission structure and the second transmission structure can enable the ball screw 9 to achieve reverse rotation.

[0035] The standard parts used in the utility model can be purchased from the market, and the special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art and will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. An energy-saving heat exchanger for the petrochemical industry, comprising a heat exchanger body (1), characterized in that: The inner cavity of the heat exchanger body (1) is divided into a first collecting cavity (20), a heat exchange cavity and a second collecting cavity (21); a heat exchange tube (22) is fixed in the inner cavity of the heat exchange cavity via a baffle (13); one end of the heat exchange tube (22) extends into the inner cavity of the first collecting cavity (20), and the other end of the heat exchange tube (22) extends into the inner cavity of the second collecting cavity (21); a scraper assembly (15) is evenly and movably sleeved on the outer ring of the heat exchange tube (22); two adjacent scraper assemblies (15) are connected via a ball screw (9); both ends of the ball screw (9) extend to the outside of the heat exchanger body (1), and both ends of the ball screw (9) are fixedly connected to a rotating gear (10); A first power structure is provided on the outer side of the first collecting chamber (20), and the first power structure comprises a turbine 1 (4); a first fluid inlet pipe 1 (5) is fixed to the liquid inlet end of the turbine 1 (4); a liquid outlet pipe 1 (8) is fixed to the liquid outlet end of the turbine 1 (4); the other end of the liquid outlet pipe 1 (8) is fixedly connected to the liquid inlet end of the first collecting chamber (20); a first fluid inlet pipe 2 (6) is fixed to the liquid inlet end of the first collecting chamber (20); a turbine blade (23) is movably connected to the middle of the inner cavity of the turbine 1 (4); a driving wheel (11) is fixed to the middle of the turbine blade (23); the driving wheel (11) is meshed with a rotating gear (10) close to the first collecting chamber (20); the second collecting chamber (2 1) is provided with a second power structure on the outside, the second power structure comprising a turbine 2 (19), a first fluid discharge pipe 1 (17) is fixed to the liquid outlet end of the second manifold (21), the other end of the first fluid discharge pipe 1 (17) is fixedly connected to the liquid inlet end of the turbine 2 (19), a liquid outlet pipe 2 (18) is fixed to the liquid outlet end of the turbine 2 (19), a first fluid discharge pipe 2 (12) is fixed to the liquid outlet end of the second manifold (21), another turbine blade (23) is movably connected to the middle of the inner cavity of the turbine 2 (19), another driving wheel (11) is fixedly connected to the middle of the other turbine blade (23), and the other driving wheel (11) is meshed with another rotating gear (10) through a transmission gear (16).

2. The energy-saving heat exchanger for petrochemical industry according to claim 1, characterized in that: Grooves (14) adapted to the scraper assembly (15) are provided on both sides of the baffle plate (13), and a scraper assembly (15) is provided between two adjacent baffle plates (13).

3. The energy-saving heat exchanger for petrochemical industry according to claim 1, characterized in that: The structures of turbine one (4) and turbine two (19) are the same; a second fluid inlet pipe (2) is fixed to one end of the heat exchange chamber close to the second collecting chamber (21), and a second fluid outlet pipe (3) is fixed to the other end of the heat exchange chamber.

4. The energy-saving heat exchanger for petrochemical industry according to claim 1, characterized in that: An electric ball valve (7) is provided at one end of each of the first fluid inlet pipe (5), the first fluid inlet pipe (6), the first fluid outlet pipe (17) and the first fluid outlet pipe (12).

5. The energy-saving heat exchanger for petrochemical industry according to claim 1, characterized in that: One-way valves are fixed in the inner cavities of the first liquid outlet pipe (8) and the second liquid outlet pipe (18).

6. The energy-saving heat exchanger for petrochemical industry according to claim 1, characterized in that: The transmission gear (16) is movably connected to the heat exchanger body (1), and the transmission gear (16) is meshed with another driving wheel (11) and another rotating gear (10).

7. The energy-saving heat exchanger for petrochemical industry according to claim 1, characterized in that: The outer ring of the ball screw (9) is threadedly connected to a ball nut, and the scraper assembly (15) is fixedly connected to the ball nut. The number of the ball nuts is the same as the number of the scraper assemblies, and the distance between two adjacent scraper assemblies (15) is the same.

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