An adiabatic fixed bed reactor

Abstract

The utility model is suitable for chemical catalytic reaction equipment technical field provides a kind of adiabatic fixed bed reactor, including machine body;Product outlet pipe is fixedly connected in the bottom end of the machine body, the side equal interval fixed connection of the machine body has temperature measuring tube, the inner top wall of the machine body is fixedly connected with flow divider, the top end of the machine body is fixedly connected with gas inlet pipe;Filtering assembly is assembled in the inside upper end of the gas inlet pipe;Fixed groove is opened in the surface other side of the machine body at equal interval, the inside equal interval of the machine body is provided with heat insulating sleeve, the top end and bottom end of the heat insulating sleeve are fixedly connected with porous disc by bolt, the inside of the heat insulating sleeve is placed with ZSM-5 molecular sieve catalyst;Mounting assembly is assembled in the side of the machine body.The adiabatic fixed bed reactor provided in the scheme can realize the quick disassembly and replacement of ZSM-5 molecular sieve catalyst using mounting assembly, avoid the cumbersome inconvenience of traditional need integral hoisting removal, reduce the corresponding replacement difficulty.

Description

Technical Field

[0001] This utility model belongs to the technical field of chemical catalytic reaction equipment, and in particular relates to an adiabatic fixed-bed reactor. Background Technology

[0002] Adiabatic fixed-bed reactors are a special type of fixed-bed reactor. Their core feature is that when the fluid passes through the catalyst bed, the bed is completely isolated from the external environment from heat exchange. They are widely used due to their simple structure, large catalyst loading, and suitability for high-pressure reactions. They are also well-suited for use in the propane dehydrogenation industry.

[0003] Chinese patent CN219898075U discloses an axial-radial flow adiabatic fixed-bed reactor. The technical solution includes a fixed base, a fixed cover, and a discharge pipe. A fixed cover is fixedly installed on the top of the fixed base, a fixed ring is fixedly connected to the outer side of the fixed cover, a first fixed cylinder is fixedly installed on the top of the fixed base inside the fixed cover, a second fixed cylinder is fixedly connected to the top of the fixed base inside the first fixed cylinder, and a first fixed plate is fixedly installed on the inner side of the first fixed cylinder at the top of the second fixed cylinder. This invention, through the cooperation between the first fixed cylinder, the first fixed plate, and the second fixed cylinder, and by using different diameters for the first and second through holes, can achieve a uniform gas flow during the gas reaction, resulting in a lower pressure drop of the fluid within the fixed cover. The cooperation between the fixed cover and the discharge pipe can improve gas flow efficiency, thereby increasing working efficiency.

[0004] However, in the above scheme, the entire bed is a single unit, which means that the catalyst must be completely unloaded from the top inlet when loading and unloading. This is labor-intensive, time-consuming, and can easily damage the internal components of the reactor. Therefore, it is necessary to design an adiabatic fixed-bed reactor. Utility Model Content

[0005] This invention provides an adiabatic fixed-bed reactor, which aims to solve the problem that it is inconvenient to replace the catalyst in some currently used adiabatic fixed-bed reactors.

[0006] This invention is implemented as follows: an adiabatic fixed-bed reactor includes a body; a product outlet pipe fixedly connected to the bottom of the body; temperature measuring tubes fixedly connected at equal intervals on one side of the body; a flow divider fixedly connected to the inner top wall of the body; and a gas inlet pipe fixedly connected to the top of the body; a filter assembly assembled inside the upper part of the gas inlet pipe, the filter assembly being used for simple filtration of the gas; fixed grooves equally spaced on the other side of the surface of the body; heat insulation sleeves equally spaced inside the body; perforated discs fixedly connected to the top and bottom of the heat insulation sleeves by bolts; and a ZSM-5 molecular sieve catalyst placed inside the heat insulation sleeves; and an installation assembly assembled on one side of the body, the installation assembly being used to achieve quick assembly and disassembly of the ZSM-5 molecular sieve catalyst and the heat insulation sleeves.

[0007] Preferably, the installation assembly includes: bolt holes equally spaced on one side of the body surface, a sealing plate equally spaced on one side of the body surface, and one side of the sealing plate being fixedly connected to the surface of the heat insulation sleeve; and fixing blocks symmetrically fixedly connected on both sides of the sealing plate, with a fixing bolt movably connected to one end of the fixing block and threadedly engaging with the inside of the bolt hole.

[0008] Preferably, the sealing plate is arc-shaped, and the area of ​​the cross-section at one end of the sealing plate is larger than the area of ​​the cross-section of the fixing groove opening.

[0009] Preferably, a sealing sleeve is fixedly connected to one end of the surface of the sealing plate, and the inner wall of the sealing sleeve is arc-shaped.

[0010] Preferably, a rubber block is fixedly connected to one end of the fixing block at an equal angle, and the inner wall of the rubber block is arc-shaped.

[0011] Preferably, the filter assembly includes: a slot formed at an equal angle on the upper end of the inner wall of the gas inlet pipe, wherein a filter cylinder is provided at the upper end of the interior of the gas inlet pipe; and a block fixedly connected at an equal angle to the upper end of the surface of the filter cylinder.

[0012] Preferably, the card block and the inside of the card slot form an engaging structure, and the card slot and the card block are convex in shape.

[0013] Preferably, a pull rod is fixedly connected to the inner wall of the filter cylinder, and the pull rod is in the shape of an inverted U.

[0014] Preferably, the upper end of the inner wall of the filter cylinder is funnel-shaped, and the area of ​​the cross-section at the top of the filter cylinder is equal to the area of ​​the cross-section of the opening in the inner wall of the gas inlet pipe.

[0015] Compared with related technologies, the adiabatic fixed-bed reactor provided by this utility model has the following beneficial effects: 1. The installation components allow the heat insulation sleeve to be disassembled and installed separately from the inside of the machine body. The perforated plate is fixed with bolts, which makes it easy to remove and replace the ZSM-5 molecular sieve catalyst. This enables the individual disassembly and replacement of the ZSM-5 molecular sieve catalyst, avoiding the need to remove it completely from the top of the machine body as in the traditional method, and reducing the difficulty for workers to disassemble and replace the ZSM-5 molecular sieve catalyst.

[0016] 2. The filter components can filter out large particles in the gas, preventing large particles from clogging the ZSM-5 molecular sieve catalyst and affecting the rate of subsequent catalytic reactions. The distributor can also disperse the gas, allowing it to enter the ZSM-5 molecular sieve catalyst more evenly, which facilitates better subsequent catalytic reactions. Attached Figure Description

[0017] Figure 1 This is a frontal cross-sectional view of the present invention. Figure 2 This is a front view structural diagram of the present utility model; Figure 3 This is a bottom view of the structure of this utility model; Figure 4 This is a schematic diagram of a partial explosion at the heat insulation sleeve of this utility model; Figure 5 This is a partial exploded enlarged cross-sectional view of the mounting component of this utility model; Figure 6 This is an exploded magnified structural diagram of the filter component of this utility model.

[0018] In the diagram: 1. Filter assembly; 101. Slot; 102. Block; 103. Filter cartridge; 104. Pull rod; 2. Diverter; 3. Temperature measuring tube; 4. Perforated disc; 5. ZSM-5 molecular sieve catalyst; 6. Insulation sleeve; 7. Product outlet pipe; 8. Mounting assembly; 801. Sealing plate; 802. Sealing sleeve; 803. Bolt hole; 804. Fixing bolt; 805. Rubber block; 806. Fixing block; 9. Body; 10. Gas inlet pipe; 11. Fixing groove. Detailed Implementation

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] Example 1 A preferred embodiment of the adiabatic fixed-bed reactor provided by this utility model is as follows: Figures 1 to 6 The diagram shows an adiabatic fixed-bed reactor, comprising a body 9; a product outlet pipe 7 fixedly connected to the bottom of the body 9; temperature measuring tubes 3 fixedly connected at equal intervals on one side of the body 9; a distributor 2 fixedly connected to the inner top wall of the body 9; and a gas inlet pipe 10 fixedly connected to the top of the body 9; a filter assembly 1 assembled inside the upper part of the gas inlet pipe 10, the filter assembly 1 being used for simple filtration of the gas; fixed grooves 11 equally spaced on the other side of the surface of the body 9; heat insulation sleeves 6 equally spaced inside the body 9; perforated discs 4 fixedly connected to the top and bottom of the heat insulation sleeves 6 by bolts; and a ZSM-5 molecular sieve catalyst 5 placed inside the heat insulation sleeves 6; and an installation assembly 8 assembled on one side of the body 9, the installation assembly 8 being used to achieve quick assembly and disassembly of the ZSM-5 molecular sieve catalyst 5 and the heat insulation sleeves 6.

[0022] It should be noted that some existing adiabatic fixed-bed reactors still have certain shortcomings in actual use. The entire bed is a single unit, which means that the catalyst must be completely unloaded from the top inlet when loading and unloading, which is labor-intensive, time-consuming, and easy to damage the internal components of the reactor.

[0023] In a further preferred embodiment of this utility model, the installation component 8 includes: bolt holes 803 equally spaced on one side of the surface of the body 9; a sealing plate 801 equally spaced on one side of the surface of the body 9; one side of the sealing plate 801 being fixedly connected to the surface of the heat insulation sleeve 6; and fixing blocks 806 symmetrically fixedly connected on both sides of the sealing plate 801, with a fixing bolt 804 movably connected to one end of the fixing block 806 and threadedly engaged with the inside of the bolt hole 803.

[0024] In this embodiment, the fixing bolt 804 is rotated with a screwdriver or other tools until it is completely disengaged from the bolt hole 803. Then, the heat insulation sleeve 6 can be removed through the sealing plate 801, and the porous disk 4 can be opened to facilitate the removal and replacement of the ZSM-5 molecular sieve catalyst 5 inside the heat insulation sleeve 6.

[0025] In a further preferred embodiment of the present invention, the sealing plate 801 is arc-shaped, and the area of ​​the cross-section of one end of the sealing plate 801 is greater than the area of ​​the cross-section of the opening of the fixing groove 11.

[0026] In this embodiment, a large-area sealing plate 801 is used to facilitate the complete sealing of the fixing groove 11.

[0027] In a further preferred embodiment of the present invention, a sealing sleeve 802 is fixedly connected to one end of the surface of the sealing plate 801, and the inner wall of the sealing sleeve 802 is arc-shaped.

[0028] In this embodiment, the sealing sleeve 802 is used to improve the sealing performance of the sealing plate 801 and the fixing groove 11 during the locking and installation.

[0029] In a further preferred embodiment of the present invention, a rubber block 805 is fixedly connected to one end of the fixing block 806 at an equal angle, and the inner wall of the rubber block 805 is arc-shaped.

[0030] In this embodiment, the use of the arc-shaped rubber block 805 can improve the anti-slip friction between the nut of the fixing bolt 804 and the inner wall of the rubber block 805, and prevent the fixing bolt 804 from accidentally loosening its threads, which would affect the firmness and stability of the installation of the sealing plate 801.

[0031] Example 2 Based on Example 1, a preferred embodiment of the adiabatic fixed-bed reactor provided by this utility model is as follows: Figures 1 to 6 As shown: The filter assembly 1 includes: a slot 101 formed at an equal angle on the upper end of the inner wall of the gas inlet pipe 10, and a filter cylinder 103 provided at the upper end of the gas inlet pipe 10; and a block 102 fixedly connected at an equal angle to the upper end of the surface of the filter cylinder 103.

[0032] In this embodiment, the filter cartridge 103 filters large particulate impurities in the gas to prevent large particulate materials from clogging the ZSM-5 molecular sieve catalyst 5 and affecting the subsequent catalytic reaction rate. The filter cartridge 103 can be disassembled and replaced during regular maintenance.

[0033] In a further preferred embodiment of the present invention, the card block 102 and the card slot 101 form an engaging structure, and the card slot 101 and the card block 102 are convex in shape.

[0034] In this embodiment, the engagement of the convex locking block 102 with the slot 101 inside improves the firmness and stability of the filter cartridge 103 in the gas inlet pipe 10.

[0035] In a further preferred embodiment of the present invention, a pull rod 104 is fixedly connected to the inner wall of the filter cylinder 103, and the pull rod 104 is in the shape of an inverted U.

[0036] In this embodiment, the inverted U-shaped pull rod 104 facilitates the sliding assembly and disassembly of the filter cartridge 103.

[0037] In a further preferred embodiment of the present invention, the upper end of the inner wall of the filter cylinder 103 is funnel-shaped, and the area of ​​the cross-section of the top of the filter cylinder 103 is equal to the area of ​​the cross-section of the opening of the inner wall of the gas inlet pipe 10.

[0038] In this embodiment, the upper end of the inner wall of the funnel-shaped filter cylinder 103 is used to facilitate the guidance and concentration of gas, which is then filtered through the holes at the lower end of the filter cylinder 103.

[0039] In summary, firstly, the product outlet pipe 7 and the gas inlet pipe 10 are connected to external pipelines respectively. Then, the gas is transported into the gas inlet pipe 10 through the external pipeline. At this time, the filter cartridge 103 filters out large particulate impurities in the gas to avoid large particulate materials from clogging the ZSM-5 molecular sieve catalyst 5 and affecting the subsequent catalytic reaction rate. Then, the gas is evenly distributed by the distributor 2 so that it contacts multiple ZSM-5 molecular sieve catalysts 5 in sequence to achieve its catalytic reaction operation. Furthermore, when it is necessary to replace the ZSM-5 molecular sieve catalyst 5, the fixing bolt 804 can be turned with a screwdriver or other tools until it is completely disengaged from the bolt hole 803. Then, the heat insulation sleeve 6 can be removed through the sealing plate 801, and the perforated disc 4 can be opened to facilitate the removal and replacement of the ZSM-5 molecular sieve catalyst 5 inside the heat insulation sleeve 6. During installation, the new ZSM-5 molecular sieve catalyst 5 is placed inside the heat insulation sleeve 6, and the perforated disc 4 is then installed on the heat insulation sleeve 6 using bolts. Finally, the heat insulation sleeve 6 is moved through the fixing groove... 11 is placed inside the body 9, and one end of the sealing plate 801 is locked into the inside of the fixing groove 11. Then, the fixing bolt 804 is tightened into the bolt hole 803 to achieve a firm installation of the heat insulation sleeve 6. The sealing sleeve 802 can be used to improve the sealing performance between the sealing plate 801 and the inside of the fixing groove 11. The arc-shaped rubber block 805 can improve the anti-slip friction between the nut of the fixing bolt 804 and the inner wall of the rubber block 805, and prevent the fixing bolt 804 from accidentally loosening and affecting the firmness and stability of the installation of the sealing plate 801. Furthermore, during regular maintenance, after separating the gas inlet pipe 10 from the external pipeline, the pull rod 104 can be pulled to remove the filter cartridge 103 from inside the gas inlet pipe 10, which facilitates thorough cleaning and anti-clogging of the filter cartridge 103. During installation, the engagement between the locking block 102 and the locking groove 101 can be used to improve the firmness and stability of the filter cartridge 103 in the gas inlet pipe 10.

[0040] It is worth noting that the circuits, electronic components, and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0041] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative; the division of units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; the indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0042] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. An adiabatic fixed-bed reactor, characterized in that, include: Body (9); A product outlet pipe (7) is fixedly connected to the bottom of the machine body (9). Temperature measuring tubes (3) are fixedly connected at equal intervals on one side of the machine body (9). A flow divider (2) is fixedly connected to the inner top wall of the machine body (9). A gas inlet pipe (10) is fixedly connected to the top of the machine body (9). A filter assembly (1) is installed at the upper end inside the gas inlet pipe (10), the filter assembly (1) being used for simple filtration of the gas; A fixing groove (11) is equally spaced on the other side of the surface of the body (9). A heat insulation sleeve (6) is equally spaced inside the body (9). A porous disk (4) is fixedly connected to the top and bottom of the heat insulation sleeve (6) by bolts. A ZSM-5 molecular sieve catalyst (5) is placed inside the heat insulation sleeve (6). The mounting assembly (8) is installed on one side of the body (9) to enable quick assembly and disassembly of the ZSM-5 molecular sieve catalyst (5) and the heat insulation sleeve (6).

2. The adiabatic fixed-bed reactor as described in claim 1, characterized in that, The installation component (8) includes; Bolt holes (803) are equally spaced on one side of the surface of the body (9), and sealing plates (801) are equally spaced on one side of the surface of the body (9). One side of the sealing plate (801) is fixedly connected to the surface of the heat insulation sleeve (6). Fixing blocks (806) are symmetrically fixedly connected to both sides of the sealing plate (801), and one end of the fixing block (806) is movably connected to a fixing bolt (804) that is threaded into the bolt hole (803).

3. The adiabatic fixed-bed reactor as described in claim 2, characterized in that, The sealing plate (801) is arc-shaped, and the area of ​​the cross-section of one end of the sealing plate (801) is greater than the area of ​​the cross-section of the opening of the fixing groove (11).

4. The adiabatic fixed-bed reactor as described in claim 2, characterized in that, A sealing sleeve (802) is fixedly connected to one end of the surface of the sealing plate (801), and the inner wall of the sealing sleeve (802) is arc-shaped.

5. The adiabatic fixed-bed reactor as described in claim 2, characterized in that, One end of the fixing block (806) is fixedly connected to a rubber block (805) at an equal angle, and the inner wall of the rubber block (805) is arc-shaped.

6. The adiabatic fixed-bed reactor as described in claim 1, characterized in that, The filter component (1) includes: A slot (101) is formed at an equal angle on the upper end of the inner wall of the gas inlet pipe (10), and a filter cylinder (103) is provided at the upper end of the inside of the gas inlet pipe (10). A locking block (102) is fixedly connected at an equal angle to the upper surface of the filter cylinder (103).

7. The adiabatic fixed-bed reactor as described in claim 6, characterized in that, The card block (102) and the card slot (101) form an engaging structure, and the card slot (101) and the card block (102) are convex in shape.

8. The adiabatic fixed-bed reactor as described in claim 6, characterized in that, A pull rod (104) is fixedly connected to the inner wall of the filter cylinder (103), and the pull rod (104) is in the shape of an inverted U.

9. The adiabatic fixed-bed reactor as described in claim 6, characterized in that, The upper end of the inner wall of the filter cylinder (103) is funnel-shaped, and the area of ​​the cross-section of the top of the filter cylinder (103) is equal to the area of ​​the cross-section of the opening of the inner wall of the gas inlet pipe (10).

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