CN218774775U

CN218774775U - Preheating mixing module and fixed bed reactor for experiment

Info

Publication number: CN218774775U
Application number: CN202223007819.XU
Authority: CN
Inventors: 耿祖豹; 曹晶; 王婷
Original assignee: China Petroleum and Chemical Corp; Sinopec Jinling Petrochemical Co Ltd
Current assignee: China Petroleum and Chemical Corp; Sinopec Jinling Petrochemical Co Ltd
Priority date: 2022-11-11
Filing date: 2022-11-11
Publication date: 2023-03-31
Anticipated expiration: 2032-11-11

Abstract

The utility model discloses a preheating and mixing module and an experimental fixed bed reactor, wherein the preheating and mixing module comprises a support member consisting of a central tube and a porous plate, and a filler block which surrounds the outside of the central tube and is supported on the porous plate; the perforated plate is fixedly sleeved at the lower end of the central tube, the outer diameter of the perforated plate is matched with the inner diameter of the reaction tube, the inner cavity of the central tube is used for passing through raw materials and a temperature thermocouple, and the filler blocks are used for preheating and mixing the raw materials before entering the catalytic module. The utility model discloses can be so that the inlet pipe of temperature measurement galvanic couple follow upper cover inserts the reaction tube, measure reaction inlet temperature to acquire the true temperature of reaction.

Description

Preheating mixing module and fixed bed reactor for experiment

Technical Field

The utility model relates to a chemical industry equipment technical field, concretely relates to preheat mixing module and fixed bed reactor for experiments.

Background

With the rapid development of petrochemical production, the laboratory has higher and higher requirements on reaction equipment, operation conditions, process parameters and the like, and therefore, fixed bed reactors in various structural forms are researched and developed in the laboratory so as to simulate industrial production as accurately as possible and seek the optimal experimental mode and operation conditions. In the laboratory equipment for catalyst evaluation, the most common is a single-stage adiabatic fixed bed reactor. Referring to fig. 1, a single-stage adiabatic fixed bed reactor for experiments in the prior art includes a reaction tube 10 with two open ends, an upper head 11 and a lower head 12 connected to the reaction tube, the upper head is provided with a feeding tube, the lower head is provided with a discharging tube, the middle part of the reaction tube is provided with a catalytic module 13, the catalytic module 13 is filled with a catalyst, and a mixing and preheating module 14 is arranged above the catalytic module 13.

Because the mixing preheating module 14 of the existing experimental fixed bed reactor is inert filler such as quartz sand, spherical ceramic particles and the like which are directly filled in the reactor, the temperature thermocouple 15 can only be inserted into the reaction tube 10 from the discharge tube of the lower end socket to detect the temperature of the reaction outlet, the true temperature of the reaction cannot be obtained, and the reliability of the performance evaluation of the catalyst is reduced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a preheat mixing module and fixed bed reactor for experiments.

The utility model adopts the technical proposal that:

a preheating mixing module comprises a support member consisting of a central tube and a perforated plate, and a filler block surrounding the outside of the central tube and supported on the perforated plate; the perforated plate is fixedly sleeved at the lower end of the central tube, the outer diameter of the perforated plate is matched with the inner diameter of the reaction tube, the inner cavity of the central tube is used for passing through raw materials and a temperature thermocouple, and the filler blocks are used for preheating and mixing the raw materials before entering the catalytic module.

Furthermore, the filler block is composed of a cylinder which is coaxially and fixedly sleeved outside the central tube and has the same outer diameter as the porous plate, granular inert fillers filled in an annular cavity enclosed by the cylinder, the central tube and the porous plate, and a cylinder cover plate which is detachably arranged at the open end of the cylinder and is used for sealing the annular cavity, a plurality of feeding holes communicated with the annular cavity are uniformly distributed in the cylinder cover plate, and a through hole matched with the inner diameter of the central tube is formed in the center of the cylinder cover plate.

Further, the cylinder cover plate is in threaded connection with the cylinder.

Further, the granular inert filler is quartz sand, ceramic granules or a metal ring.

Furthermore, the packing block is composed of a thin-wall cylinder which is coaxially and fixedly sleeved outside the central tube and has the same outer diameter as the porous plate, and a corrugated metal wire mesh packing which is filled in an annular cavity enclosed by the thin-wall cylinder, the central tube and the porous plate.

Furthermore, the corrugated metal wire mesh packing is formed by winding a corrugated metal wire mesh or longitudinally overlapping a plurality of corrugated metal wire meshes.

The utility model provides a fixed bed reactor for experiments, includes the reaction tube and locates above-mentioned arbitrary preheating mixing module in the reaction tube.

Furthermore, a temperature measuring couple is inserted into the reaction tube from the feeding tube of the upper end socket, and the measuring end of the temperature measuring couple penetrates through the central tube of the preheating mixing module and extends to the top of the catalytic module.

The utility model has the advantages that:

1. compared with the prior art, the preheating mixing module is provided with the central pipe, so that a temperature measuring couple can be inserted into the reaction pipe from the feeding pipe of the upper end enclosure to measure the temperature of a reaction inlet, the true temperature of the reaction is obtained, and the objective effectiveness of the catalyst performance evaluation is greatly improved.

2. The application preheats mixing module and reaction tube separation design, directly takes out after experimental the end and preheats mixing module and wash the back and can put into operation again, has reduced the time of experimental preparation, has improved test efficiency, and has reduced the emission of waste material.

Drawings

FIG. 1 is a schematic structural diagram of a prior art experimental fixed bed reactor.

Fig. 2 is a schematic structural diagram of the experimental fixed bed reactor of the present invention.

Fig. 3 is a schematic structural diagram of the preheating and mixing module according to embodiment 1 of the present invention.

Fig. 4 is a schematic structural diagram of the preheating and mixing module according to embodiment 2 of the present invention.

Fig. 5 is a top view of fig. 4.

Detailed Description

The present invention is further described below with reference to specific examples to facilitate understanding of the present invention, but the present invention is not limited thereto.

Example 1

Referring to fig. 2 and 3, the embodiment provides a fixed bed reactor for experiments, which includes a reaction tube 20 with two open ends, an upper head 21 and a lower head 22 connected to the reaction tube 20, wherein the upper head 21 is provided with a feeding tube, the lower head 22 is provided with a discharging tube, the middle part of the reaction tube 20 is provided with a catalytic module 23, a preheating mixing module 24 is arranged above the catalytic module 23, a temperature thermocouple 25 is inserted into the reaction tube 20 from the feeding tube, and a measuring end of the temperature thermocouple passes through a central tube 241 of the preheating mixing module 24 and extends to the top of the catalytic module 23. The catalyst module 23 is supported in the reaction tube 20 by a support ring, and the preheating mixing module 24 is supported on the catalyst module 23.

In the present embodiment, the preheating mixing module 24 is mainly composed of a center tube 241, a perforated plate 242, a cylinder 2431, a cylinder cover plate 2432, and a granular inert filler 2433.

The perforated plate 242 is fitted around the lower end of the central tube 241 and is connected to the central tube 241 by welding to form a support. The outer diameter of the perforated plate 242 is adapted to the inner diameter of the reaction tube 20, and the inner cavity of the central tube 241 is used for passing the raw material and the temperature thermocouple 25.

The cylinder 2431, cylinder cover 2432 and particulate inert filler 2433 make up a filler mass 243 that is wrapped around the outside of the center tube 241 and supported on the perforated plate 242.

The cylinder 2431 is concentrically fitted around the outside of the center tube 241, and its bottom is welded to the perforated plate 242. The cylinder 2431, the central tube 241 and the perforated plate 242 enclose an annular cavity, and the annular cavity is filled with granular inert fillers 2433 such as quartz sand, ceramic particles or metal rings. The length of the cylinder 2431 is greater than that of the center tube 241, an inner thread is formed on a section of the inner wall of the cylinder 2431, which exceeds the center tube 241, an outer thread is formed on the outer circumferential surface of the cylinder cover plate 2432, and the cylinder cover plate 2432 is connected to the open end of the cylinder 2431 through a thread to seal the granular inert filler 2433 in the annular cavity. The cylindrical cover plate 2431 is uniformly provided with a plurality of feeding holes communicated with the annular cavity, and the feeding holes also play a role of uniformly distributing raw materials. The center of the cylindrical cover plate 2431 is provided with a through hole adapted to the inner diameter of the central tube 241 for passing a temperature thermocouple.

Example 2

Referring to fig. 2, 4 and 5, the structure of embodiment 2 is substantially the same as that of embodiment 1 except that the packing block 243 is composed of a thin-walled cylinder 2434 and a metal corrugated wire mesh packing 2435. The thin-wall cylinder 2434 is coaxially fixed and sleeved outside the central tube 241, the bottom of the thin-wall cylinder 2434 is welded with the perforated plate 242, the thin-wall cylinder 2434, the central tube 241 and the perforated plate 242 enclose an annular cavity, and the corrugated metal wire mesh packing 2435 is filled in the annular cavity.

The thin-walled cylinder 2434 has an outer diameter equal to that of the perforated plate 242, and in this embodiment, the corrugated metal wire mesh packing 2435 is formed by longitudinally stacking several sheets within the thin-walled cylinder 2434, and in other embodiments, the corrugated metal wire mesh packing 2435 can also be formed by winding a corrugated metal wire mesh.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations are also within the scope of the present invention.

Claims

1. A preheating mixing module is characterized by comprising a supporting member consisting of a central pipe and a perforated plate, and a filler block which is surrounded on the outer part of the central pipe and supported on the perforated plate; the fixed suit of perforated plate is at the lower extreme of center tube, the external diameter of perforated plate and the internal diameter adaptation of reaction tube, and the inner chamber of center tube is used for passing through raw materials and temperature thermocouple, the packing piece is used for preheating and mixing before the raw materials gets into catalytic module.

2. The preheating mixing module of claim 1, wherein the filler block comprises a cylinder coaxially fixed and sleeved outside the central tube and having an outer diameter equal to that of the porous plate, granular inert fillers filled in an annular cavity enclosed by the cylinder, the central tube and the porous plate, and a cylinder cover plate detachably mounted at an open end of the cylinder and used for sealing the annular cavity, the cylinder cover plate is uniformly provided with a plurality of feeding holes communicated with the annular cavity, and the center of the cylinder cover plate is provided with a through hole matched with the inner diameter of the central tube.

3. The pre-heated mixing module of claim 2, wherein the barrel cover plate is threadably connected to the barrel.

4. The pre-heated mixing module of claim 2, wherein the particulate inert filler is quartz sand, ceramic particles, or metal rings.

5. The preheating mixing module of claim 1, wherein the packing block is composed of a thin-walled cylinder coaxially fixed and sleeved outside the central tube and having an outer diameter equal to that of the porous plate, and a corrugated metal wire mesh packing filled in an annular cavity enclosed by the thin-walled cylinder, the central tube and the porous plate.

6. The pre-heated mixing module of claim 5, wherein the corrugated metal wire mesh packing is formed by winding corrugated metal wire mesh or by longitudinally stacking a plurality of corrugated metal wire mesh sheets.

7. A fixed bed reactor for experiments, which is characterized by comprising a reaction tube and the preheating mixing module as claimed in any one of claims 1 to 6 arranged in the reaction tube.

8. The experimental fixed bed reactor of claim 7, wherein the thermometric galvanic couple is inserted into the reaction tube from the feed pipe of the upper head, and its measuring end extends to the top of the catalytic module through the central pipe of the preheating mixing module.