CN111701541A

CN111701541A - Catalytic auxiliary device for gas-phase aldehyde hydrogenation reactor

Info

Publication number: CN111701541A
Application number: CN202010564410.4A
Authority: CN
Inventors: 周强; 李刚; 周卫家; 吴丹平; 曾文刚; 张胜飞
Original assignee: Ningbo Juhua Chemical Technology Co ltd
Current assignee: Ningbo Juhua Chemical Technology Co ltd
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2020-09-25
Anticipated expiration: 2040-06-19
Also published as: WO2021254192A1; CN111701541B

Abstract

The invention discloses a catalytic auxiliary device for a gas-phase aldehyde hydrogenation reactor, which comprises a tubular reactor, wherein a catalyst pre-loader for reducing a contact surface and increasing an air passage is arranged in the tubular reactor, the catalytic auxiliary device for the gas-phase aldehyde hydrogenation reactor separates the space in a pipeline of the tubular reactor into a plurality of spiral areas through spiral clapboards, and a longer reaction space is formed in the same length, so that the reaction is more sufficient, and a fixing frame is arranged between the spiral clapboards, the space between the two fixing frames can limit catalyst particles with a certain size, and smaller particles can be discharged from screening holes on the fixing frame, so that particles with similar meshes are formed, redundant particles are not contacted between two adjacent particles, the contact area of the catalyst is increased, and the reaction efficiency is improved.

Description

Catalytic auxiliary device for gas-phase aldehyde hydrogenation reactor

Technical Field

The invention relates to the technical field of reactors, in particular to a catalytic auxiliary device for a gas-phase aldehyde hydrogenation reactor.

Background

The gas-phase aldehyde hydrogenation reaction needs to improve the reaction through a catalyst, thereby improving the reaction speed, the conversion rate and the like, the catalyst is usually filled into the tubular converter one by one, or the gaps between every two tubular converters are blocked and then filled at one time, because the diameters of catalyst particles are different, the two modes are random filling, smaller particles exist between larger particles, although the total surface area of the whole particles is increased, the gaps between the particles are smaller, thereby reducing the gas flow, but reducing the contact area of the reaction, the contact area between the particles is too large to cause waste, and the ventilation quantity is reduced, thereby slowing the reaction. Therefore, a catalytic auxiliary device for a gas-phase aldehyde hydrogenation reactor is provided.

Disclosure of Invention

The invention aims to provide a catalytic auxiliary device for a gas-phase aldehyde hydrogenation reactor, which is convenient for loading a catalyst and improves the reaction rate by reducing a contact surface and increasing an aeration stroke, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a catalytic auxiliary device for a gas-phase aldehyde hydrogenation reactor comprises a tubular reactor, wherein a catalyst pre-loader which reduces a contact surface and increases an aeration stroke is arranged in the tubular reactor.

Preferably, the catalyst pre-loader comprises a main bone rod, a plurality of groups of spiral partition plates are connected to the main bone rod, a plurality of groups of fixing frames which contain the catalysts and are obliquely arranged are connected between the spiral partition plates, a plurality of groups of locking devices are further arranged on the main bone rod, a plurality of groups of placing holes and screening holes are formed in the fixing frames, and smaller particles between the two catalysts can be screened out through the screening holes, so that the contact area between the catalysts is reduced, and the contact area between the catalysts and reactants is improved.

Preferably, locking device includes the axis of rotation of being connected through bearing and main bone pole rotation, be provided with the multiunit drive voussoir in the axis of rotation, still be connected with the slide between main bone pole and the spiral baffle. The slide is internally and slidably connected with a stay bar in sliding connection with the driving wedge block, and the locking device achieves fastening by changing the distance between the stay bar and the pipeline wall of the tubular reactor, so that stable reaction is facilitated.

Preferably, the edge of the placing hole is also provided with a ventilation groove, so that the contact area between the placing hole and the catalyst particles is reduced.

Preferably, one end of the rotating shaft is connected with a thread block in threaded connection with the main bone rod, the thread block is fixedly connected with a rotating block, the thread block is convenient to self-lock, and locking can be stably achieved.

Preferably, the edge of the spiral partition plate is further connected with an isolation pad, and one end of the stay bar is fixedly connected with a buffer pad to prevent the pipeline wall of the tubular reactor from being damaged.

Preferably, one end of the main bone rod is rotatably connected with a pulling ring, so that the device is convenient to take out.

Preferably, the end part of the main bone rod is also provided with a protection plate connected with the tubular reactor, and the protection plate is provided with a vent hole which can prevent the catalyst on the fixing frame at the topmost layer from overflowing.

Compared with the prior art, the invention has the beneficial effects that:

the space in the pipeline of the tubular reactor is isolated into a plurality of spiral areas by the spiral partition plates, a longer reaction space is formed in the same length, so that the reaction is more sufficient, the fixing frame is arranged between the spiral partition plates, the space between the two fixing frames can limit catalyst particles with certain size, and the screening holes on the fixing frame can discharge smaller particles, so that particles with similar meshes are formed, redundant particles are not contacted between two adjacent particles, the contact area of the catalyst is increased, and the reaction efficiency is improved.

Drawings

FIG. 1 is a schematic diagram of a partial structure of a tubular reactor;

FIG. 2 is a schematic view showing a state where a catalyst pre-loader is installed;

FIG. 3 is a schematic view of a partial half-section structure of a reaction tube;

FIG. 4 is a schematic view of the overall structure of a catalyst preparer;

FIG. 5 is a schematic view of a catalyst pre-loader with the mounting bracket removed;

FIG. 6 is a schematic cross-sectional view of the main rod;

FIG. 7 is an enlarged view of the structure of area A in FIG. 6;

FIG. 8 is a schematic view of a spiral separator structure;

fig. 9 is a front view of the fixing frame.

In the figure: 1-a tubular reactor; 2-catalyst pre-loader; 3-main bone rod; 4-a spiral separator; 5-a fixing frame; 6-locking means; 7-placing holes; 8-screening wells; 9-a rotating shaft; 10-driving a wedge block; 11-a slide; 12-a strut; 13-a ventilation groove; 14-a thread block; 15-turning the block; 16-a spacer; 17-a cushion pad; 18-protective plate; 19-a vent hole; 20-pulling out the ring; 21-fixing the plate; 22-reaction tube.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-9, the present invention provides a technical solution: a catalytic auxiliary device for a gas-phase aldehyde hydrogenation reactor comprises a tubular reactor 1, wherein a part of the structure in the tubular reactor 1 is composed of fixing plates 21 and reaction tubes 22 at two ends, a catalyst pre-loader 2 which reduces a contact surface and increases an aeration stroke is arranged in the tubular reactor 1, and the space stroke of the reaction is changed through the catalyst pre-loader 2, so that the conversion rate of the reaction is improved, the distance between catalyst particles can be changed, the contact area between the particles is reduced, and the catalytic efficiency is improved.

Wherein, catalyst pre-loader 2 includes main bone pole 3, be connected with multiunit spiral baffle 4 on the main bone pole 3, spiral baffle 4 forms a spiral space each other, the length that original reaction tube 22 was good at to the stroke that enables the reaction gas flow circulation, consequently, improve catalytic reaction's time in other words, thereby improve the conversion rate, spiral baffle 4 is preferred three groups, spiral baffle 4's edge still is connected with isolating pad 16, spiral baffle 4 be convenient for have 0.5-1 mm's clearance apart from reaction tube 22 inner wall, set up isolating pad 16 in this clearance, can improve certain leakproofness through isolating pad 16, prevent that the reaction gas flow from directly passing through in the gap, cause the stroke to shorten, one side that isolating pad 16 and reaction tube 22 contacted sets up the sliding pad, so that reduce frictional force. The convenient device is arranged in a reaction tube 22, a plurality of groups of fixing frames 5 which are used for containing the catalyst and are obliquely arranged are connected between adjacent spiral partition plates 4, the oblique arrangement is convenient for the device not to accumulate excessive catalyst particles, so that excessive particles are not caused, the flow area of reaction airflow is reduced, the contact area between the particles is too large, the use efficiency of the catalyst is reduced, a plurality of groups of locking devices 6 are further arranged on the main framework rod 3, the locking devices 6 are convenient for fixing the whole device, fluctuation caused by reaction is prevented from causing instability, a plurality of groups of placing holes 7 and screening holes 8 are formed in the fixing frames 5, the adjacent fixing frames 5 in the vertical direction can screen larger particles for the first time, the placing holes 7 can screen smaller catalyst particles, so that catalyst particles with similar meshes are left, and the screening holes 8 prevent the existence of smaller catalyst particles between two or more adjacent catalyst particles, thereby reduce or even get rid of the contact surface between the catalyst granule, improve the utilization ratio of catalyst, and because place the setting of hole 7 and mount 5, compare in the direct thrust of catalyst, enable the flow area of reaction gas flow great, improve reaction rate, place hole 7 and can adopt circularly, also can adopt other shapes such as triangle-shaped or square.

Locking device 6 includes the axis of rotation 9 of being connected through bearing and main bone pole 3 rotation, be provided with multiunit drive voussoir 10 on the axis of rotation 9, drive voussoir 10 preferably sets up three groups, makes drive voussoir 10 rotate along with it through rotating axis of rotation 9, still be connected with slide 11 between main bone pole 3 and the spiral baffle 4. Slide 11 sliding connection has the vaulting pole 12 with drive voussoir 10 sliding connection, can promote vaulting pole 12 after drive voussoir 10 rotates gradually and slide in slide 11 to make vaulting pole 12 be close to the inner wall of reaction tube 22 gradually, the final multiunit struts the stroke locking, the one end fixedly connected with blotter 17 of vaulting pole 12, blotter 17 can increase frictional force, and can also play certain buffering, prevent that vaulting pole 12 or reaction tube 22 inner wall from causing the damage.

In addition, the edge of the placing hole 7 is also provided with a ventilation groove 13, and the arc ventilation groove 13 can further reduce the contact area between the placing hole 7 and the catalyst particles, thereby improving the utilization rate of the catalyst.

One end of the rotating shaft 9 is connected with a thread block 14 in threaded connection with the main bone rod 3, the thread block 14 is fixedly connected with a rotating block 15, the strip-shaped rotating block 15 is convenient to rotate, the thread block 14 is convenient to self-lock through threaded connection with the main bone rod 3, and the rotation is stable, so that the support rod 12 is kept in a locking state.

The one end of main bone pole 3 is rotated and is connected with and pulls out ring 20, pulls out ring 20 and is convenient for remove the device, the tip of main bone pole 3 still is provided with the guard plate 18 of being connected with shell and tube reactor 1, seted up air vent 19 on the guard plate 18, because the catalyst probably has reactions such as exothermic when carrying out catalytic reaction, exists the possibility that produces undulant, consequently prevents through guard plate 18 that the catalyst granule on top layer is unstable, and air vent 19 is convenient for letting in of reaction air current.

The working principle is as follows: the device is placed in a catalyst particle pile and rotated for several circles, larger catalyst particles cannot enter between two fixing frames 5 which are adjacent in the vertical direction, smaller catalyst particles are discharged from a screening hole 8, the fixing frames 5 are obliquely arranged, so that the smaller particles in the next layer discharged when the device is taken out can continuously fall downwards or roll out from an inclined plane, finally catalyst particles with similar meshes are retained on the fixing frames 5, the device is taken out through a pull-out ring 20 and placed in a reaction tube 22, the spiral screwing-in mode is more preferable, the front impact on an isolation pad 16 is prevented, the damage is prevented, after the device is placed, a rotating block 15 is rotated, a driving wedge 10 pushes a support rod 12, the support rod 12 is locked, and when the device is taken out, the rotating block 15 is rotated reversely, and the support rod 12 is loosened.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A catalytic auxiliary device for a gas-phase aldehyde hydrogenation reactor comprises a tubular reactor (1), and is characterized in that: and a catalyst pre-loader (2) which reduces the contact surface and increases the ventilation stroke is arranged in the tubular reactor (1).

2. The catalytic auxiliary device for a gas-phase aldehyde hydrogenation reactor according to claim 1, characterized in that: catalyst prepackage ware (2) is including main bone pole (3), be connected with multiunit spiral baffle (4) on main bone pole (3), it is adjacent be connected with multiunit mount (5) that just the slope that holds the catalyst set up between spiral baffle (4), still be provided with multiunit locking device (6) on main bone pole (3), it places hole (7) and screening hole (8) to have seted up the multiunit on mount (5).

3. The catalytic auxiliary device for a gas-phase aldehyde hydrogenation reactor according to claim 2, characterized in that: locking device (6) include axis of rotation (9) of rotating to be connected through bearing and main bone pole (3), be provided with multiunit drive voussoir (10) on axis of rotation (9), still be connected with slide (11) between main bone pole (3) and spiral baffle (4).

4. And a support rod (12) which is in sliding connection with the driving wedge block (10) is connected in the slide way (11) in a sliding way.

5. The catalytic auxiliary device for a gas-phase aldehyde hydrogenation reactor according to claim 2, characterized in that: the edge of the placing hole (7) is also provided with a ventilation groove (13).

6. The catalytic auxiliary device for a gas-phase aldehyde hydrogenation reactor according to claim 3, characterized in that: one end of the rotating shaft (9) is connected with a thread block (14) in threaded connection with the main bone rod (3), and the thread block (14) is fixedly connected with a rotating block (15).

7. The catalytic auxiliary device for a gas-phase aldehyde hydrogenation reactor according to claim 3, characterized in that: the edge of the spiral partition plate (4) is also connected with an isolation pad (16), and one end of the stay bar (12) is fixedly connected with a cushion pad (17).

8. The catalytic auxiliary device for a gas-phase aldehyde hydrogenation reactor according to claim 5, wherein: one end of the main bone rod (3) is rotatably connected with a pull-out ring (20).

9. The catalytic auxiliary device for a gas-phase aldehyde hydrogenation reactor according to claim 7, wherein: the end part of the main bone rod (3) is also provided with a protection plate (18) connected with the tubular reactor (1), and the protection plate (18) is provided with a vent hole (19).