Continuous slurry bed reactor

Abstract

The utility model relates to the technical field of slurry bed reactors, in particular to a continuous slurry bed reactor which comprises an axe body, a left membrane tube and a right membrane tube which are fixedly arranged on the inner wall of the axe body, a separation membrane is arranged on the inner side surface of each membrane tube, a left main conveying tube and a right main conveying tube which are mutually symmetrical are arranged on the axe body, and a top cover is fixedly arranged at the top of the axe body. A stirring motor is arranged in the center of the top cover, a stirring shaft is fixedly mounted at the tail end of an output shaft of the stirring motor, a left upper stirring blade and a right upper stirring blade are fixedly mounted on the upper half portion of the stirring shaft, a left lower stirring blade and a right lower stirring blade are fixedly mounted on the lower half portion of the stirring shaft, and a scraping plate is further fixedly mounted on the stirring shaft. A communicating pipe is fixedly installed at the tail end of the main conveying pipe, a plurality of auxiliary conveying pipes are fixedly installed on the communicating pipe, and the tail ends of the auxiliary conveying pipes penetrate through the axe body and are fixedly installed on the membrane pipe. According to the utility model, full mixing, stirring and scraping operations are facilitated, and meanwhile, the back-flushing operation is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of slurry bed reactors, in particular to a continuous slurry bed reactor. Background Art

[0002] In the chemical industry, the gas-liquid-solid three-phase reaction system is a common reaction type. The continuous slurry bed reactor is a fluidized bed reactor, also called a slurry bed. It places a particle bed and a gas together in a reactor container, and provides an appropriate airflow through the bottom to suspend the particles in the bed in the airflow to form a slurry bed. At the same time, the particles can also be kept in a free-flowing state. When the reaction gas is added to the airflow, the reactants will undergo chemical reactions on the surface or inside the particles in the bed. The free-flowing state of the particles in the bed can also promote the contact between the particle surface and the reactants, thereby increasing the reaction rate and product selectivity.

[0003] The invention patent with publication number CN110180470A discloses a kettle-type continuous slurry bed reactor and a method of using the same, which belongs to the technical field of kettle reactors and solves the technical problem of continuous operation of a heterogeneous reaction process in a kettle reactor. The solution is as follows: the device includes a reaction kettle body, a stirring device and a separation membrane tube, and the reaction kettle body is provided with a temperature measuring element, a liquid level gauge, a third pressure gauge and a gas flow controller; the separation membrane tube includes a first separation membrane tube and a second separation membrane tube, the first conduction port and the second conduction port of the kettle-type continuous slurry bed reactor are respectively connected to two ports symmetrically located above and below a four-way flow valve, and the first separation membrane tube and the second separation membrane tube are respectively connected to two ports symmetrically located left and right of the four-way flow valve.

[0004] Although the above technical solution has the advantages of being able to fully utilize the excellent performance of small-particle catalysts such as molecular sieves, weaken the influence of diffusion effects, achieve high conversion rates of raw materials and high selectivity of products in the catalytic reaction process, extend the time of continuous and stable operation, and effectively play the advantages of long-life catalysts, but in specific use, because the membrane tube is set near the center of the axe body, and the stirring blade is near the bottom, it is blocked by the membrane tube and the stirring blade is relatively small, making it difficult to ensure sufficient stirring effect, which is not conducive to fully stirring the slurry in the upper layer, and it is also impossible to scrape the inner wall of the axe body, which affects the use effect and brings inconvenience to the user. In view of this, we propose a continuous slurry bed reactor. Utility Model Content

[0005] The purpose of the utility model is to provide a continuous slurry bed reactor to solve the defects mentioned in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A continuous slurry bed reactor comprises an axe body, on the inner wall of which are fixedly mounted two membrane tubes which are symmetrical to each other and have arc-shaped cross sections, on the inner side surfaces of the membrane tubes are arranged a separation membrane, on the axe body are arranged two main conveying pipes which are symmetrical to each other and are used to introduce liquid into the membrane tubes, a top cover is fixedly mounted on the top of the axe body, a stirring motor is arranged at the center of the top cover, a stirring shaft which is vertically arranged is fixedly mounted on the end of the output shaft of the stirring motor, two upper stirring blades which are symmetrical to each other are fixedly mounted on the upper half of the shaft body of the stirring shaft, two lower stirring blades which are symmetrical to each other are fixedly mounted on the lower half of the shaft body of the stirring shaft, and a scraper plate is also fixedly mounted on the stirring shaft.

[0008] Preferably, a central pad is fixedly installed between the two end tube bodies of the two membrane tubes, and the central pad is fixedly installed on the inner wall of the axe body, so that the two membrane tubes and the axe body are fixed more firmly and stably.

[0009] Preferably, a conducting pipe is fixedly installed at the end of the main conveying pipe, and a plurality of auxiliary conveying pipes arranged at equal intervals are fixedly installed on the conducting pipe. The ends of the auxiliary conveying pipes pass through the axe body and are fixedly installed on the membrane tube, so that the liquid can flow into the membrane tube and flush the particles adhered to the separation membrane into the axe body more smoothly.

[0010] Preferably, a mechanical seal is fixedly installed between the top cover and the stirring shaft, the stirring shaft passes through the mechanical seal and is rotationally connected to the mechanical seal, and the mechanical seal is used for sealing operation.

[0011] Preferably, the scraper plate is provided with a center hole, and the center hole is sleeved on the membrane tube so that the membrane tube will not block the normal rotation of the scraper plate.

[0012] Preferably, a stirring plate is fixedly installed between the upper and lower plate bodies of the scraper plate, and the stirring plate is used for stirring operation.

[0013] Preferably, the stirring plate is provided with a plurality of flow holes connected to the outside, and the flow holes are used for slurry circulation operation.

[0014] Preferably, the upper stirring blade and the lower stirring blade are respectively located on the upper and lower sides of the membrane tube for sufficient stirring operation, and a gap is provided between the upper plate body of the scraper plate and the stirring shaft so that the upper half of the plate body of the scraper plate will not affect the installation operation of other components.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model provides a stirring motor, a stirring shaft, an upper stirring blade and a lower stirring blade, so that as the stirring shaft rotates, the upper stirring blade and the lower stirring blade are driven to rotate to perform a full stirring operation. In addition, the scraper plate is provided to achieve a scraping operation on the inner wall of the axe body, which is convenient to use and achieves the effect of being able to fully stir and scrape.

[0017] 2. The utility model can prevent particles from being discharged outward by setting a separation membrane. In addition, by setting a plurality of auxiliary conveying pipes, the original liquid can be rushed to the separation membrane along the plurality of auxiliary conveying pipes, and the particles adhered to the separation membrane can be rushed into the axe body more smoothly, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the explosion structure of the utility model;

[0020] Figure 3 It is a partial structural schematic diagram of the utility model;

[0021] Figure 4 It is a cross-sectional view of the axe body of the utility model.

[0022] The meaning of each number in the figure is:

[0023] 1. Axe body; 10. Membrane tube; 11. Separation membrane; 12. Center pad; 13. Main delivery pipe; 14. Conducting pipe; 15. Auxiliary delivery pipe;

[0024] 2. Top cover; 20. Mechanical seal;

[0025] 3. Stirring motor; 30. Stirring shaft; 31. Upper stirring blade; 32. Lower stirring blade; 33. Scraper plate; 331. Notch; 34. Center hole; 35. Stirring plate; 36. Circulation hole. DETAILED DESCRIPTION

[0026] 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.

[0027] See also Figure 1-Figure 4The utility model provides a technical solution: a continuous slurry bed reactor, comprising an axe body 1, on the inner wall of the axe body 1 are fixedly mounted two membrane tubes 10 which are symmetrical to each other and have an arc-shaped cross section, on the inner side of the membrane tube 10 is arranged a separation membrane 11, the separation membrane 11 has the effect of blocking particles from being discharged outward; the axe body 1 is provided with two main delivery pipes 13 which are symmetrical to each other and are used to introduce liquid into the membrane tube 10, at the end of the main delivery pipe 13 is fixedly mounted a conducting pipe 14, on the conducting pipe 14 are fixedly mounted a plurality of auxiliary delivery pipes 15 which are arranged at equal intervals, the ends of the auxiliary delivery pipes 15 pass through the axe body 1 and are fixedly mounted on the membrane tube 10, so that the liquid flows into the membrane tube 10 and flushes the particles adhering to the inner side of the separation membrane 11 into the axe body 1 more smoothly;

[0028] Specifically, a top cover 2 is fixedly installed on the top of the axe body 1, a stirring motor 3 is arranged at the center position of the top cover 2, a stirring shaft 30 arranged vertically is fixedly installed at the end of the output shaft of the stirring motor 3, two symmetrical upper stirring blades 31 are fixedly installed on the upper half of the shaft body of the stirring shaft 30, and two symmetrical lower stirring blades 32 are fixedly installed on the lower half of the shaft body of the stirring shaft 30. A scraper plate 33 is also fixedly installed on the stirring shaft 30 to facilitate sufficient stirring and scraping operations.

[0029] In this embodiment, a central pad 12 is fixedly installed between the two end tubes of the two membrane tubes 10, and the central pad 12 is fixedly installed on the inner wall of the axe body 1, so that the two membrane tubes 10 and the axe body 1 are fixed more firmly and stably.

[0030] Specifically, a mechanical seal 20 is fixedly installed between the top cover 2 and the stirring shaft 30 , and the stirring shaft 30 passes through the mechanical seal 20 and is rotationally connected to the mechanical seal 20 . The mechanical seal 20 is used for sealing operation to reduce leakage.

[0031] Furthermore, a center hole 34 is provided on the scraper plate 33 , and the center hole 34 is sleeved on the membrane tube 10 , so that the membrane tube 10 will not block the normal rotation of the scraper plate 33 .

[0032] In addition, a stirring plate 35 is fixedly installed between the upper and lower plate bodies of the scraper plate 33. The stirring plate 35 is used for stirring operation. A plurality of flow holes 36 connected to the outside are provided on the stirring plate 35. The flow holes 36 are used for slurry circulation operation.

[0033] It is worth mentioning that the upper stirring blade 31 and the lower stirring blade 32 are respectively located on the upper and lower sides of the membrane tube 10 for sufficient stirring operation. A notch 331 is provided between the upper plate body of the scraper plate 33 and the stirring shaft 30 so that the upper half of the plate body of the scraper plate 33 will not affect the installation operation of other components.

[0034] When the continuous slurry bed reactor of the utility model is in use, the stirring motor 3 is connected to an external power supply and made to work. When the stirring motor 3 works, the output shaft on the stirring motor 3 rotates to drive the stirring shaft 30, the upper stirring blade 31 and the lower stirring blade 32 to rotate, so as to achieve a full stirring operation. In addition, the stirring shaft 30 rotates to drive the scraper plate 33 to rotate, so as to achieve a scraping operation.

[0035] Subsequently, as the liquid is transported by the main delivery pipe 13, the liquid flows along the auxiliary delivery pipe 15 to multiple locations in the membrane tube 10, causing the liquid to rush to one side of the separation membrane 11, so that the particles adhering to the inner side of the separation membrane 11 can be rushed to the center of the axe body 1.

[0036] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A continuous slurry bed reactor, comprising a body (1), characterized in that: Two membrane tubes (10) with a curved cross section and symmetrical to each other are fixedly mounted on the inner wall of the axe body (1), and a separation membrane (11) is arranged on the inner side surface of the membrane tube (10). Two main delivery pipes (13) with a symmetrical to each other and used for introducing liquid into the membrane tube (10) are arranged on the axe body (1). A top cover (2) is fixedly mounted on the top of the axe body (1), and a stirring motor (3) is arranged at the center position of the top cover (2). A stirring shaft (30) arranged vertically is fixedly mounted at the end of the output shaft of the stirring motor (3), and two upper stirring blades (31) with a symmetrical to each other are fixedly mounted on the upper half of the shaft body of the stirring shaft (30), and two lower stirring blades (32) with a symmetrical to each other are fixedly mounted on the lower half of the shaft body of the stirring shaft (30). A scraper plate (33) is also fixedly mounted on the stirring shaft (30).

2. The continuous slurry bed reactor according to claim 1, characterized in that: A central pad (12) is fixedly installed between the two end tube bodies of the two membrane tubes (10), and the central pad (12) is fixedly installed on the inner wall of the axe body (1).

3. The continuous slurry bed reactor according to claim 1, characterized in that: A conducting tube (14) is fixedly mounted on the end of the main conveying tube (13), and a plurality of auxiliary conveying tubes (15) arranged at equal intervals are fixedly mounted on the conducting tube (14). The ends of the auxiliary conveying tubes (15) pass through the axe body (1) and are fixedly mounted on the membrane tube (10).

4. The continuous slurry bed reactor according to claim 1, characterized in that: A mechanical seal (20) is fixedly installed between the top cover (2) and the stirring shaft (30); the stirring shaft (30) passes through the mechanical seal (20) and is rotationally connected to the mechanical seal (20); and the mechanical seal (20) is used for sealing operation.

5. The continuous slurry bed reactor according to claim 1, characterized in that: The scraper plate (33) is provided with a central hole (34), and the central hole (34) is sleeved on the membrane tube (10).

6. The continuous slurry bed reactor according to claim 1, characterized in that: A stirring plate (35) is fixedly installed between the upper and lower plate bodies of the scraper plate (33), and the stirring plate (35) is used for stirring operation.

7. The continuous slurry bed reactor according to claim 6, characterized in that: The stirring plate (35) is provided with a plurality of flow holes (36) connected to the outside, and the flow holes (36) are used for slurry circulation operation.

8. The continuous slurry bed reactor according to claim 1, characterized in that: The upper stirring blade (31) and the lower stirring blade (32) are respectively located on the upper and lower sides of the membrane tube (10) for sufficient stirring operation. A notch (331) is provided between the upper plate body of the scraper plate (33) and the stirring shaft (30).

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