WO2021254193A1

WO2021254193A1 - Gas-phase aldehyde hydrogenation reactor

Info

Publication number: WO2021254193A1
Application number: PCT/CN2021/098579
Authority: WO
Inventors: 周强; 钟骏良; 李刚; 涂齐辉; 杜继立; 吴刚; 徐云雁; 吴丹平; 徐翔
Original assignee: 宁波巨化化工科技有限公司
Priority date: 2020-06-19
Filing date: 2021-06-07
Publication date: 2021-12-23
Also published as: CN111921460B; CN111921460A

Abstract

A gas-phase aldehyde hydrogenation reactor, comprising a reactor body (1), a manhole (2) arranged on the reactor body (1), a catalyst bed body (3) arranged inside the reactor body (1), a distributor (4) distributed on the catalyst bed body (3), and a driving filling device (5) facilitating the replacement and packing of a catalyst arranged on the catalyst bed body (3).

Description

Gas phase aldehyde hydrogenation reactor

Technical field

The invention relates to the technical field of hydrogenation reactors, in particular to a gas phase aldehyde hydrogenation reactor.

Background technique

The hydrogenation reactor is a very important piece of equipment in the organic chemistry laboratory and the actual production process. It can not only be used as a hydrogenation vessel, but also can be used where liquid and gas need to be fully mixed.

The gas phase aldehyde enters the inside of the reaction tower body through the feed port at the top of the tower body, and the amount of cold and hot hydrogen added is automatically controlled by the reaction tower body multi-stage adjustment system, so that the hydrogen can be directly passed into the catalytic bed to react with the gas phase aldehyde. The mixed gas reacts, and finally liquid alcohol is obtained and flows out through the discharge port at the bottom of the reactor.

At present, in the existing gas-phase aldehyde hydrogenation reaction, multiple catalyst beds are arranged inside the reactor to realize the reaction of the mixed gas and hydrogen. However, in the process of the gas-phase aldehyde hydrogenation reaction, it will continue to interact with the catalyst bed. The catalyst on the layer reacts, which will easily lead to the continuous consumption of the catalyst, and the main factors that cause the consumption of the catalyst are as follows:

1. During the reaction of gas-phase aldehyde in the reactor, the gas-phase aldehyde passed in contains oxygen. During the heating reaction in the reactor, oxides are easily formed and precipitated and adhere to the catalyst bed or even cover the catalyst. , Causing the catalyst to fail to react;

2. The granular catalyst is prone to be damaged after a long time during the reaction process at the corners of the catalytic bed and the corners of the water chestnut. If the catalyst is not replaced in time, the catalyst will be damaged and crushed, and the fine powder of the catalyst will be deposited on the catalyst. Catalytic bed, causing pressure drop in the reactor;

However, because the reactor is relatively sealed, it is difficult to fill and replace the catalyst, which affects the overall reaction efficiency of the reactor. For this reason, we propose a gas-phase aldehyde hydrogenation reactor.

Summary of the invention

The purpose of the present invention is to provide a gas-phase aldehyde hydrogenation reactor to solve the problems raised in the background art.

In order to achieve the above objective, the present invention provides the following technical solutions: a gas phase aldehyde hydrogenation reactor, comprising a reactor body, a manhole arranged on the reactor body, a catalyst bed body arranged inside the reactor body, and a catalyst distributed in the reactor body. Distributor on the bed body, the catalyst bed is provided with a driving filling device that facilitates the replacement and filling of the catalyst.

Preferably, the driving and filling device includes a supporting rotating part arranged on the catalyst bed, the output end of the supporting rotating part is fixedly connected with a supporting cylinder, the inside of the supporting cylinder is provided with a moving part, and the output end of the moving part is fixedly connected There is a threaded rod which is rotatably connected to the top end of the support cylinder, and the top end of the threaded rod is fixedly connected with a sealing plate, and the outside of the sealing plate is provided with a storage shell for storing the catalyst, and the sealing plate is located at the bottom of the storage shell At the discharge pipe, one side of the storage shell is provided with a feed pipe, the bottom end of the storage shell is fixedly connected with a split shell, and the bottom end of the split shell is provided with a number of split holes at equal distances. The distributing shell is fixedly connected to the top end of the supporting cylinder, and the outside of the supporting cylinder is provided with a collecting device for collecting and removing the catalyst. The driving filling device is provided to realize the effective filling and replacement of the catalyst.

Preferably, the supporting rotating member includes a bearing seat fixedly penetrating through the catalyst bed, a support shaft is fixedly connected to the bottom end of the support cylinder passing through the bearing seat, and a driving member is provided at the bottom end of the supporting shaft, and the driving member It is fixedly connected with the bottom end of the catalyst bed, and the supporting rotating member is provided to realize the function of rotating the supporting cylinder.

Preferably, the drive member includes a drive gear fixedly sleeved on the outside of the support shaft, a rotating gear is meshed and connected to the outside of the drive gear, and a drive motor is fixedly connected to the bottom end of the rotating gear through a coupling. The fixed frame is fixedly connected to the bottom end of the catalyst bed, and the driving part is provided to realize the function of rotating the support cylinder as a whole.

Preferably, the moving part includes two sliding rods fixedly connected to the supporting cylinder at both ends, and a supporting plate is slidably sleeved between the two sliding rods, and a rotating motor is fixedly connected to the supporting plate, and the rotating motor The top end is fixedly connected with a connecting plate, and the output end of the rotating motor passes through the connecting plate and is fixedly connected to the threaded rod. The role of sealing at the end.

Preferably, the collecting device includes a fixed shell fixedly connected to the outside of the support cylinder, a distance adjusting member is arranged inside the fixed shell, and a collecting shell is fixedly connected to the output end of the distance adjusting member, one end of the collecting shell A feed port is provided, and a seal is provided at the feed port. Both ends of the collecting shell are respectively provided with discharge ports, and the discharge port is rotatably connected with a sealing cover through the set collecting device , So as to effectively collect the used catalyst.

Preferably, the distance adjusting member includes a rotating screw rod rotatably connected to the inside of the fixed shell, and the rotating screw rod is located on the outside of the end of the collecting shell away from the supporting cylinder, and a rotating motor is fixedly connected to the outside of the rotating screw rod. There is a movable sleeve, and the movable sleeve is slidably connected with the fixed shell. The movable sleeve is fixedly connected with a connecting rod, and the top of the connecting rod is fixedly connected with the collecting shell. The role of adjustment relative to the distance on the fixed shell.

Preferably, the seal includes a limit rail fixedly connected to the top end of the inside of the feed inlet, and a connecting rod is rotatably connected to one side of the limit rail, and a shielding baffle is fixedly connected to the outside of the connecting rod, and the connecting rod One end of the tube passes through the collecting shell and is fixedly connected with a micro-motor, and the connecting rod is rotatably connected with the collecting shell, and the sealing element is provided to open and close the inlet.

Preferably, the diameters of a plurality of said material splitting holes are distributed from small to large on the material splitting shell, so that the catalyst in the inside of the material splitting shell can be uniformly distributed.

Preferably, the aggregate shell has a chevron shape, so as to facilitate the timely collection of the reacted catalyst on the catalytic bed body by the aggregate shell.

Compared with the prior art, the beneficial effects of the present invention are:

In the present invention, a catalyst filling device is provided on the corresponding catalyst body inside the reactor body. The catalyst filling device can uniformly distribute the catalyst on the catalyst bed, and realize the uniform leveling and compaction of the filled catalyst. At the same time, after the catalyst has reacted for a large number of times, it can realize the timely discharge of the reacted catalyst, which can not only ensure the complete discharge, but also save the catalyst loading as much as possible and reduce the investment cost. Effectively increase the reaction rate of gas phase aldehydes.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of the present invention;

Figure 2 is a schematic diagram of the structure of the driving and filling device of the present invention;

Figure 3 is a schematic diagram of the structure of the supporting and rotating member of the present invention;

Figure 4 is a schematic diagram of the structure of the aggregate shell of the present invention;

Figure 5 is a schematic diagram of the internal structure of the aggregate shell of the present invention;

Fig. 6 is a schematic diagram of the enlarged structure of area A in Fig. 2 of the present invention;

FIG. 7 is a schematic diagram of the enlarged structure of area B in FIG. 2 of the present invention;

FIG. 8 is a schematic diagram of the enlarged structure of area C in FIG. 5 of the present invention.

In the picture: 1-reactor body; 2-manhole; 3-catalyst bed body; 4-distributor; 5-drive filling device; 6-support rotating part; 7-support cylinder; 8-moving part; 9-thread Rod; 10-seal plate; 11-storage shell; 12-feed pipe; 13-distribution shell; 14-distribution hole; 15-collection device; 16-support shaft; 17-drive part; 18-drive Gear; 19-rotating gear; 20-driving motor; 21-sliding rod; 22-supporting plate; 23-rotating motor; 24-connecting plate; 25-fixed shell; 26-distance adjuster; 27-collecting shell; 28 -Feeding port; 29-seal; 30-discharge port; 31-seal cover; 32-rotating screw rod; 33-rotating motor; 34-moving sleeve; 35-limiting guide rail; 36-connecting rod; 37- Cover the baffle.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

1-8, the present invention provides a technical solution: a gas-phase aldehyde hydrogenation reactor, comprising a reactor body 1, a manhole provided on the

reactor body

1, 2, a manhole provided in the reactor body 1 In the catalyst bed body 3, several manholes 2 are provided, and a number of artificial workers are correspondingly distributed on the outer side of the catalyst bed body 3 and the distributor 4 distributed on the catalyst bed body 3;

The catalyst bed body 3 is provided with a driving and filling device 5 for facilitating the replacement and filling of the catalyst. The driving and filling device 5 includes a supporting and rotating member 6 arranged on the catalyst bed body 3, and the supporting and rotating member 6 includes a fixed through In the bearing seat on the catalyst bed body 3, the support shaft 16 is fixedly connected to the bottom end of the support cylinder 7 through the bearing seat. The bottom end is fixedly connected, the driving member 17 includes a driving gear 18 fixedly sleeved on the outside of the support shaft 16, a rotating gear 19 is meshed and connected to the outside of the driving gear 18, and the bottom end of the rotating gear 19 is fixedly connected by a coupling There is a drive motor 20, which is fixedly connected to the bottom end of the catalyst bed body 3 through a fixing frame. At the same time, a protective shell can also be provided on the outside of the drive motor 20 to protect the drive motor 20;

And through the operation of the drive motor 20, the rotating gear 19 drives the drive gear 18 to rotate, thereby further enabling the support shaft 16 to drive the support cylinder 7 to rotate relative to the catalyst bed body 3;

The output end of the supporting rotating member 6 is fixedly connected with a supporting cylinder 7, a moving part 8 is arranged inside the supporting cylinder 7, and a threaded rod 9 is fixedly connected to the output end of the moving part 8. The supporting cylinder 7 is fixedly connected to two sliding rods 21, and a supporting plate 22 is slidably sleeved between the two sliding rods 21. The supporting plate 22 is fixedly connected with a rotating motor 23, and the top of the rotating motor 23 is fixedly connected with a connection The output end of the rotating motor 23 passes through the connecting plate 24 and is fixedly connected to the threaded rod 9, and the connecting plate 24 is slidably sleeved on the outside of the two sliding rods 21. The rotating motor 23 runs to drive the threaded rod 9 to rotate, and Since the bottom of the threaded rod 9 is slidably connected to the connecting plate 24, and its outer side is threadedly connected to the support cylinder 7, and while rotating, it moves up and down relative to the support cylinder 7, thereby making the sealing plate 10 relative to the storage shell 11 The discharge pipe at the bottom moves up and down and is relatively closed;

The threaded rod 9 is rotatably connected with the top end of the support cylinder 7, and the top end of the threaded rod 9 is fixedly connected with a sealing plate 10, and the sealing plate 10 is provided with a storage shell 11 for storing the catalyst, and the sealing plate 10 is located in the storage At the discharge pipe at the bottom end of the shell 11, one side of the storage shell 11 is provided with a filling port, which can be manually filled with the storage shell 11 through the manhole 2. At the same time, the filling port can be realized after loading Relatively sealed effect;

One side of the storage shell 11 is provided with a feed pipe 12, the bottom end of the storage shell 11 is fixedly connected with a split shell 13, and the bottom end of the split shell 13 is provided with a plurality of split holes 14 at equal distances. A number of the distribution holes 14 are distributed on the distribution shell 13 from small to large in diameter, and the catalyst flows into the distribution shell 13 through the storage shell 11, and the distribution shell 13 rotates under the support of the support cylinder 7, and Through a number of distributing holes 14, the catalyst can be evenly dispersed on the body of the catalytic bed, and the catalyst can be effectively leveled and compacted;

The distributing shell 13 is fixedly connected to the top end of the support cylinder 7, and the outside of the support cylinder 7 is provided with a collecting device 15 for collecting and removing the catalyst. The collecting device 15 includes a fixed shell fixedly connected to the outside of the supporting cylinder 7 25. The fixed shell 25 is provided with a distance adjusting member 26, and the output end of the distance adjusting member 26 is fixedly connected with a collecting shell 27. The distance adjusting member 26 includes a rotating screw 32 rotatably connected inside the fixed shell 25, And the rotating screw 32 is located on the outside of the collecting shell 27 away from the support cylinder 7 and is fixedly connected to the rotating motor 33. At the same time, the rotating motor 33 may also be provided with a protective shell, and the rotating screw 32 is rotated and sleeved with a moving sleeve. 34, and the movable sleeve 34 is slidably connected to the fixed shell 25, the movable sleeve 34 is fixedly connected with a connecting rod 36, and the top end of the connecting rod 36 is fixedly connected with the collecting shell 27, and the rotating motor 33 is driven to rotate the screw rod 32 performs relative rotation inside the fixed shell 25, and further causes the moving sleeve 34 to drive the collecting shell 27 to move on the catalytic bed body through the connecting rod 36;

One end of the collection shell 27 is provided with a feed port 28, and a seal 29 is provided at the feed port 28, and both ends of the collection shell 27 are respectively provided with a discharge port 30, the discharge port 30 A sealing cover 31 is rotatably connected to the position; the sealing member 29 includes a limit rail 35 fixedly connected to the top end of the feed port 28, and one side of the limit rail 35 is rotatably connected with a connecting rod 36, the connecting rod 36 A shielding plate 37 is fixedly connected to the outside. One end of the connecting rod 36 passes through the collecting shell 27 and is fixedly connected to the micro motor 38. The outer side of the micro motor 38 may also be provided with a protective shell. The connecting rod 36 and the collecting shell 27 Rotation connection; when the catalyst is replaced, the micro motor 38 is driven, and the shield plate 37 is driven to rotate through the connecting rod 36, so that the shield plate 37 rotates to the inside of the collecting shell 27. At this time, the drive motor 20 runs, The support cylinder 7 is driven to rotate, so that the fixed shell 25 drives the collecting shell 27 to rotate, and the catalyst is collected from the feed inlet 28. The aggregate shell 27 in this solution is in the shape of a herringbone, which facilitates the catalyst removal. Stable collection. At the same time, during the collection, the aggregate shell 27 can move relative to the fixed shell 25 to achieve effective charging of the catalyst on the body of the catalytic bed. Finally, the aggregate shell 27 rotates to At manhole 2, the function of discharging the collected catalyst can be realized manually through the sealing cover 31, and then, by rotating the motor 23, the threaded rod 9 is moved upward at the bottom of the storage shell 11 to make the sealing plate 10 Leaving the bottom end of the storage shell 11, the catalyst located inside the storage shell 11 enters the inside of the dividing shell 13, and finally, through the rotation of the several dividing holes 14 at the bottom end of the dividing shell 13 and the support cylinder 7, so as to realize the catalyst Perform uniform distribution and compaction on the body of the catalytic bed.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply one of these entities or operations. There is any such actual relationship or order between. Moreover, the terms "including", "including" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also those that are not explicitly listed Other elements of, or also include elements inherent to this process, method, article or equipment.

Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. And variations, the scope of the present invention is defined by the appended claims and their equivalents.

Claims

A gas-phase aldehyde hydrogenation reactor, comprising a reactor body (1), a manhole (2) arranged on the reactor body (1), a catalyst bed body (3) arranged inside the reactor body (1), and The distributor (4) distributed on the catalyst bed body (3) is characterized in that: the catalyst bed body (3) is provided with a driving filling device (5) that facilitates the replacement and filling of the catalyst.
The gas-phase aldehyde hydrogenation reactor according to claim 1, characterized in that: the driving filling device (5) comprises a supporting rotating member (6) arranged on the catalyst bed body (3), and the supporting rotating The output end of the member (6) is fixedly connected with a support cylinder (7), the support cylinder (7) is provided with a movable member (8) inside, and the output end of the movable member (8) is fixedly connected with a threaded rod (9), the The threaded rod (9) is rotatably connected with the top end of the support cylinder (7), the top of the threaded rod (9) is fixedly connected with a sealing plate (10), and the sealing plate (10) is provided with a storage shell ( 11), and the sealing plate (10) is located at the discharge pipe at the bottom end of the storage shell (11), one side of the storage shell (11) is provided with a feed pipe (12), and the storage shell (11) ) The bottom end is fixedly connected with a splitting shell (13), and the bottom end of the splitting shell (13) is provided with a number of splitting holes (14) at equal distances, and the splitting shell (13) is fixedly connected to the support tube (7). ) At the top end, an aggregate device (15) for collecting and removing the catalyst is arranged on the outside of the support cylinder (7).
The gas-phase aldehyde hydrogenation reactor according to claim 2, characterized in that: the supporting rotating member (6) comprises a bearing seat fixed and penetrating on the catalyst bed body (3), and the supporting cylinder (7) A support shaft (16) is fixedly connected to the bottom end of the support shaft (16) through the bearing seat, and the bottom end of the support shaft (16) is provided with a driving member (17), and the driving member (17) is fixedly connected with the bottom end of the catalyst bed body (3).
A gas phase aldehyde hydrogenation reactor according to claim 3, characterized in that: the driving member (17) comprises a driving gear (18) fixedly sleeved on the outside of the supporting shaft (16), and the driving gear ( 18) A rotating gear (19) is meshed and connected to the outside. The bottom end of the rotating gear (19) is fixedly connected with a drive motor (20) through a coupling, and the drive motor (20) is fixedly connected to the catalyst bed body through a fixing frame (3) Bottom.
A gas phase aldehyde hydrogenation reactor according to claim 2, characterized in that: the moving part (8) comprises two sliding rods (21) fixedly connected to the supporting cylinder (7) at both ends, and two A supporting plate (22) is slidably sleeved between the two sliding rods (21), a rotating motor (23) is fixedly connected to the supporting plate (22), and a connecting plate (24) is fixedly connected to the top of the rotating motor (23) The output end of the rotating motor (23) passes through the connecting plate (24) and is fixedly connected to the threaded rod (9), and the connecting plate (24) is slidingly sleeved on the outside of the two sliding rods (21).
The gas-phase aldehyde hydrogenation reactor according to claim 2, characterized in that: the collecting device (15) comprises a fixed shell (25) fixedly connected to the outside of the support cylinder (7), and the fixed shell ( 25) A distance adjusting member (26) is arranged inside, and the output end of the distance adjusting member (26) is fixedly connected with a collecting shell (27), and one end of the collecting shell (27) is provided with a feed port (28), And a seal (29) is provided at the feed port (28), the two ends of the collecting shell (27) are respectively provided with a discharge port (30), and the discharge port (30) is rotatably connected with a seal Cover (31).
The gas phase aldehyde hydrogenation reactor according to claim 6, characterized in that the distance adjusting member (26) comprises a rotating screw rod (32) rotatably connected inside the fixed shell (25), and the rotating screw rod (32) A rotating motor (33) is fixedly connected to the outer side of the end of the collecting shell (27) away from the support cylinder (7), and the rotating screw rod (32) is sleeved with a moving sleeve (34) on the outer side, and moves The sleeve (34) is slidably connected with the fixed shell (25), the movable sleeve (34) is fixedly connected with a connecting rod (36), and the top end of the connecting rod (36) is fixedly connected with the collecting shell (27).
The gas-phase aldehyde hydrogenation reactor according to claim 6, characterized in that: the sealing member (29) comprises a limit guide rail (35) fixedly connected to the inner top of the feed port (28), and the position limit A connecting rod (36) is rotatably connected to one side of the guide rail (35), and a shielding plate (37) is fixedly connected to the outside of the connecting rod (36). One end of the connecting rod (36) passes through the collecting shell (27). ) A micro motor (38) is fixedly connected, and the connecting rod (36) is rotatably connected with the collecting shell (27).
The gas-phase aldehyde hydrogenation reactor according to claim 2, characterized in that: a plurality of the material distribution holes (14) are distributed on the material distribution shell (13) from small to large diameter.
The gas-phase aldehyde hydrogenation reactor according to claim 8, wherein the aggregate shell (27) is in the shape of a herringbone.