CN215086995U

CN215086995U - Catalyst supporting mechanism applied to catalyst unloading at bottom of reaction tube array

Info

Publication number: CN215086995U
Application number: CN202120612994.8U
Authority: CN
Inventors: 王凯悦; 黄泽茂; 梁建平; 唐卫新; 谭海军; 王亚林; 刘群世; 王莉
Original assignee: China Chengda Engineering Co Ltd
Current assignee: China Chengda Engineering Co Ltd
Priority date: 2021-03-25
Filing date: 2021-03-25
Publication date: 2021-12-10
Anticipated expiration: 2031-03-25

Abstract

The utility model belongs to the technical field of the reactor, concretely relates to be applied to catalyst supporting mechanism that catalyst was unloaded to reaction tube nest portion. The technical scheme is as follows: the utility model provides a be applied to catalyst supporting mechanism that reaction tube bottom unloaded catalyst, is including filling in the seal post of reaction tube bottom, and the bottom of seal post is provided with the shrouding, and the shrouding covers the bottom of reaction tube, and the shrouding is connected with lower tube sheet. The utility model provides a be applied to catalyst supporting mechanism that catalyst in order to reduce catalyst wearing and tearing is unloaded to reaction tube nest bottom.

Description

Catalyst supporting mechanism applied to catalyst unloading at bottom of reaction tube array

Technical Field

The utility model belongs to the technical field of the reactor, concretely relates to be applied to catalyst supporting mechanism that catalyst was unloaded to reaction tube nest portion.

Background

As shown in fig. 2, the conventional fixed bed reactor is provided with a filler and a screen 6 at a lower tube plate for supporting a catalyst (catalyst), but the screen is deformed due to the gravity action of the catalyst, and after long-term operation, the catalyst slides onto the supporting screen from a reaction tube array, thereby affecting the production capacity of the reactor and wasting part of the catalyst.

The catalyst has a certain service life and needs to be replaced in a certain period. Because the wire mesh is integrally supported, the catalyst can only be pumped out from the reaction tubes one by one through a vacuum pumping system when the catalyst is unloaded from the reactor. In the catalyst extraction process, the catalyst is seriously collided and abraded in a pipeline and equipment, so that a large amount of catalyst is lost; meanwhile, the vacuum catalyst pumping can generate a large amount of waste gas, and the waste gas and the catalyst powder generated by abrasion can pollute the environment and influence the health of operators.

Disclosure of Invention

In order to solve the problems existing in the prior art, the utility model aims to provide a catalyst supporting mechanism applied to the bottom of a reaction tube for unloading the catalyst to reduce the catalyst abrasion.

The utility model discloses the technical scheme who adopts does:

the utility model provides a be applied to catalyst supporting mechanism that reaction tube bottom unloaded catalyst, is including filling in the seal post of reaction tube bottom, and the bottom of seal post is provided with the shrouding, and the shrouding covers the bottom of reaction tube, and the shrouding is connected with lower tube sheet.

When the catalyst is unloaded, the connecting piece between the sealing plate and the lower tube plate is detached, and then the sealing plate is screwed or pulled down, so that the sealing columns are separated from the reaction tubes under the driving of the sealing plate, and the rapid catalyst unloading of the single reaction tube is realized. The catalyst directly falls from the bottom of the rotary reaction tube array, so that the condition that the catalyst is worn and lost on the inner wall of the reaction tube array when the catalyst is vacuumized from the top of the reaction tube array is avoided.

As the utility model discloses a preferred scheme, the post is sealed including exhaust section and seal segment, and the diameter of exhaust section is less than the diameter of seal segment, and the shrouding is located one side that the exhaust section was kept away from to the seal segment, is provided with the exhaust passage who is used for the exhaust reaction gas on the lateral wall of exhaust section, and the center of post and shrouding is provided with the exhaust centre bore that link up, exhaust passage and exhaust centre bore intercommunication.

Because the diameter of the exhaust section is smaller than that of the sealing section, a gap which is wide enough exists between the exhaust section and the inner wall of the reaction tube array, and a reactor in the reaction tube array can enter the exhaust channel through the gap and then is exhausted from the exhaust central hole. Therefore, in the reaction stage, the utility model discloses can not be dead with the bottom of reaction shell and tube totally seal, guaranteed that reaction gas discharges smoothly. And, the exhaust passage sets up on the lateral wall of exhaust section, has avoided the condition that the catalyst got into the exhaust passage. The gap between the exhaust section and the reaction tube is smaller than the diameter of the catalyst particles, so that the catalyst cannot enter the gap, and the reaction gas exhaust channel is prevented from being blocked.

As the utility model discloses a preferred scheme, exhaust passage includes the ring channel, and the ring channel sets up on the lateral wall of exhaust section, and the intercommunication has a plurality of intercommunicating pores between ring channel and the exhaust centre bore. The communicating holes can communicate all parts of the annular groove with the exhaust central hole, so that the reaction gas coming in all directions can be exhausted through the exhaust central hole.

As the utility model discloses a preferred scheme, be provided with the screw thread on one section outer wall that the seal section is close to the shrouding. Set up the screw thread on the seal segment to improve the leakproofness between seal segment and reaction tubulation and be connected closely the type, when avoiding pulling down the shrouding and the connecting piece between the lower tube sheet, the direct condition that falls of seal post.

As the utility model discloses a preferred scheme, the shrouding passes through the screw and is connected with lower tube sheet, and the nut of screw compresses tightly the edge of tube sheet under. Through on being connected to lower tube sheet with screw thread, can make the nut of screw compress tightly the shrouding, guarantee that the shrouding is fixed for lower tube sheet.

As the preferred scheme of the utility model, the nut of a screw compresses tightly the edge of the adjacent shrouding of a plurality of. In order to reduce connecting pieces and improve the catalyst unloading efficiency, the nut of one screw can be pressed on the edges of a plurality of adjacent sealing plates, so that after the screw is disassembled, a plurality of adjacent sealing columns can be correspondingly disassembled.

As the preferred scheme of the utility model, the diameter of exhaust centre bore is 1/3 ~ 5/6 of the diameter of sealed section. In order to improve the exhaust efficiency of the reaction gas, the diameter of the exhaust center hole can be 1/3-5/6 of the diameter of the sealing section, and the sealing column can be guaranteed to support the catalyst.

The utility model has the advantages that:

1. when the catalyst is unloaded, the connecting piece between the sealing plate and the lower tube plate is detached, and then the sealing plate is screwed or pulled down, so that the sealing columns are separated from the reaction tubes under the driving of the sealing plate, and the rapid catalyst unloading of the single reaction tube is realized. The catalyst directly falls from the bottom of the rotary reaction tube array, so that the condition that the catalyst is worn and lost on the inner wall of the reaction tube array when the catalyst is vacuumized from the top of the reaction tube array is avoided.

2. The reactor in the reaction tube can enter the exhaust channel through the gap and then is discharged from the exhaust central hole. Therefore, in the reaction stage, the utility model discloses can not be dead with the bottom of reaction shell and tube totally seal, guaranteed that reaction gas discharges smoothly. And, the exhaust passage sets up on the lateral wall of exhaust section, has avoided the condition that the catalyst got into the exhaust passage. The gap between the exhaust section and the reaction tube is smaller than the diameter of the catalyst particles, so that the catalyst cannot enter the gap, and the reaction gas exhaust channel is prevented from being blocked.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a conventional integrated wire mesh supported reactor.

In the figure, 1-sealing the column; 2-closing the plate; 3-reaction tube; 4-lower tube plate; 5-a screw; 6-wire mesh; 11-an exhaust section; 12-a sealing section; 13-an exhaust channel; 14-exhaust central hole; 131-an annular groove; 132-communication hole.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1, the catalyst supporting mechanism applied to the bottom catalyst unloading of the reaction tubes in this embodiment includes a sealing post 1 plugged into the bottom of the reaction tube 3, a sealing plate 2 is disposed at the bottom of the sealing post 1, the sealing plate 2 covers the bottom of the reaction tube 3, and the sealing plate 2 is connected to a lower tube plate 4.

When the catalyst is unloaded, the connecting piece between the sealing plate 2 and the lower tube plate 4 is detached, and then the sealing plate 2 is screwed or pulled down, so that the sealing columns 1 are separated from the reaction tubes 3 under the driving of the sealing plate 2, and the rapid catalyst unloading of the single reaction tube 3 is realized. The catalyst directly falls from the bottom of the transfer reaction tube array 3, thereby avoiding the abrasion loss of the catalyst on the inner wall of the reaction tube array 3 when the catalyst is pumped from the top of the reaction tube array 3 in vacuum.

Wherein, shrouding 2 is connected with lower tube sheet 4 through screw 5, and the nut of screw 5 compresses tightly at the edge of lower tube sheet 4. By screwing the screws 5 onto the lower tube plate 4, the nuts of the screws 5 can be pressed against the closing plate 2, ensuring that the closing plate 2 is fixed relative to the lower tube plate 4. The head of one screw 5 presses against the edges of several adjacent closure plates 2, for example, one screw 5 may press against the edges of three closure plates 2 simultaneously. In order to reduce connecting pieces and improve the catalyst unloading efficiency, the nut of one screw 5 can be pressed on the edges of a plurality of adjacent sealing plates 2, so that after the screw 5 is disassembled, a plurality of adjacent sealing columns 1 can be correspondingly disassembled. The diameter of the exhaust center hole 14 is 1/3-5/6 of the diameter of the sealing section 12. In order to improve the exhaust efficiency of the reaction gas, the diameter of the exhaust center hole 14 can be 1/3-5/6 of the diameter of the sealing section 12, and it is only required to ensure that the sealing column 1 can support the catalyst.

In order to ensure that the reaction gas can be discharged smoothly, the sealing column 1 comprises an exhaust section 11 and a sealing section 12, the diameter of the exhaust section 11 is smaller than that of the sealing section 12, the sealing plate 2 is positioned on one side of the sealing section 12 far away from the exhaust section 11, an exhaust channel 13 for discharging the reaction gas is arranged on the side wall of the exhaust section 11, a through exhaust central hole 14 is formed in the centers of the sealing column 1 and the sealing plate 2, and the exhaust channel 13 is communicated with the exhaust central hole 14.

Because the diameter of the exhaust section 11 is smaller than that of the sealing section 12, a gap which is wide enough exists between the exhaust section 11 and the inner wall of the reaction tube array 3, and the reactor in the reaction tube array 3 can enter the exhaust channel 13 through the gap and then is discharged from the exhaust central hole 14. Therefore, in the reaction stage, the utility model discloses can not completely seal up the bottom of reaction tube nest 3, guaranteed that reaction gas discharges smoothly. Furthermore, the exhaust channel 13 is disposed on the sidewall of the exhaust section 11, thereby preventing the catalyst from entering the exhaust channel 13. The gap between the exhaust section 11 and the reaction tube 3 is smaller than the diameter of the catalyst particles, so that the catalyst does not enter the gap, and the reaction gas exhaust channel is prevented from being blocked.

Furthermore, the exhaust passage 13 includes an annular groove 131, the annular groove 131 is disposed on the side wall of the exhaust section 11, and a plurality of communication holes 132 are communicated between the annular groove 131 and the exhaust central hole 14. The communication holes 132 can communicate all over the annular groove 131 with the exhaust center hole 14 so that the reaction gas coming in all directions can be exhausted through the exhaust center hole 14.

Further, the outer wall of the section of the sealing section 12 adjacent to the closure plate 2 is provided with a screw thread. The sealing section 12 is provided with threads, so that the sealing performance and the connection tightness between the sealing section 12 and the reaction tube nest 3 are improved, and the situation that the sealing column 1 directly falls down when a connecting piece between the sealing plate 2 and the lower tube plate 4 is detached is avoided.

The present invention is not limited to the above-mentioned optional embodiments, and any other products in various forms can be obtained by anyone under the teaching of the present invention, and any changes in the shape or structure thereof, all the technical solutions falling within the scope of the present invention, are within the protection scope of the present invention.

Claims

1. The utility model provides a be applied to catalyst supporting mechanism that reaction tube nest bottom unloaded catalyst which characterized in that, is provided with shrouding (2) including sealing post (1) of plugging in reaction tube nest (3) bottom sealing post (1), and shrouding (2) cover the bottom of reaction tube nest (3), and shrouding (2) are connected with lower tube sheet (4).

2. The catalyst support mechanism applied to catalyst unloading at the bottom of the reaction tube array of claim 1, wherein the sealing column (1) comprises an exhaust section (11) and a sealing section (12), the diameter of the exhaust section (11) is smaller than that of the sealing section (12), the sealing plate (2) is positioned at one side of the sealing section (12) far away from the exhaust section (11), an exhaust channel (13) for exhausting reaction gas is arranged on the side wall of the exhaust section (11), a through exhaust central hole (14) is arranged at the center of the sealing column (1) and the sealing plate (2), and the exhaust channel (13) is communicated with the exhaust central hole (14).

3. The catalyst support mechanism applied to catalyst unloading at the bottom of the reaction tube array of claim 2, wherein the exhaust channel (13) comprises an annular groove (131), the annular groove (131) is arranged on the side wall of the exhaust section (11), and a plurality of communication holes (132) are communicated between the annular groove (131) and the exhaust central hole (14).

4. The catalyst support mechanism for the bottom catalyst removal of reaction tubes according to claim 2, wherein the sealing section (12) has threads on the outer wall of the section thereof adjacent to the sealing plate (2).

5. The catalyst support mechanism applied to the bottom catalyst removal of the reaction tube according to claim 1, wherein the sealing plate (2) is connected to the lower tube plate (4) through a screw (5), and the nut of the screw (5) is pressed against the edge of the lower tube plate (4).

6. The catalyst support mechanism for use in the bottom catalyst removal of reaction tubes according to claim 5, wherein the nut of one screw (5) presses against the edges of several adjacent plates (2).

7. The catalyst support mechanism for use in the bottom catalyst removal of a reaction tube according to any one of claims 2 to 6, wherein the diameter of the central exhaust hole (14) is 1/3 to 5/6 of the diameter of the sealing section (12).