CN220803140U

CN220803140U - BDO isothermal hydrogenation reactor of fixed bed

Info

Publication number: CN220803140U
Application number: CN202322424208.3U
Authority: CN
Inventors: 钱利军; 郭松; 杨建威; 何相君; 程义安
Original assignee: Ningbo Fareasttech Catalyst Engineering Co ltd
Current assignee: Ningbo Fareasttech Catalyst Engineering Co ltd
Priority date: 2023-09-06
Filing date: 2023-09-06
Publication date: 2024-04-19
Anticipated expiration: 2033-09-06

Abstract

The utility model discloses a fixed bed BDO isothermal hydrogenation reactor, which comprises an upper end enclosure, a lower end enclosure and a shell, wherein the lower end enclosure is provided with a liquid phase material inlet and a gas phase material inlet, a lower tube plate is arranged between the lower end enclosure and the shell, an upper tube plate is arranged between the upper end enclosure and the shell, a plurality of tubes are arranged between the lower tube plate and the upper tube plate in a penetrating way, a baffle plate for changing the flow direction of liquid and a pull rod for fixing the position of the baffle plate are also arranged between the lower tube plate and the upper tube plate, and one end of the pull rod is fixedly arranged on the upper tube plate; the reaction material outlet stretches into the pipeline outside the reactor and is provided with a cover barrel, the upper end of the cover barrel is fixedly arranged on the upper end socket, a baffle is arranged between the cover barrel and the upper tube plate, and the baffle is fixedly arranged on the upper end socket. The device has simple integral structure, the stability of the tube array in the device, high cooling efficiency of the reaction system in the shell, good control of the temperature of the reaction system and suitability for popularization and application.

Description

BDO isothermal hydrogenation reactor of fixed bed

Technical Field

The utility model relates to the technical field of reaction devices for preparing BDO, in particular to a fixed bed BDO isothermal hydrogenation reactor.

Background

In the production process for preparing BDO (1, 4-butanediol) by an alkynol method, 1, 4-Butanediol (BYD) is produced by hydrogenation reaction under the action of a nickel catalyst. At present, most of the high-pressure hydrogenation reactors for preparing the 1, 4-butanediol adopt trickle fixed bed reactors with gas-liquid parallel flow downwards, heat generated by hydrogenation reaction cannot be well removed due to flow restriction of liquid phase, and temperature distribution in the reactors cannot be well controlled, so that hot spots with local overheating are generated, and the reaction quality and the service life of a catalyst are influenced.

Patent CN201520122943.1 discloses a gas-liquid phase countercurrent bubbling fixed bed BDO hydrogenation reactor, which comprises a reactor, a cooler, a circulating pump, wherein the reactor, the cooler and the circulating pump are connected with each other through pipelines, the reactor comprises a gas distributor, a catalyst bed and a liquid distributor, a hydrogen inlet is arranged on the gas distributor, a hydrogen outlet is arranged on the liquid distributor, the cooler and the circulating pump are arranged on a pipeline between the gas distributor and the liquid distributor, the cooler is arranged on a pipeline close to the liquid distributor, the circulating pump is arranged on a pipeline close to the gas distributor, a liquid inlet is arranged on a pipeline between the cooler and the liquid distributor, and a liquid outlet is arranged on a pipeline between the circulating pump and the gas distributor. The patent adopts countercurrent contact, so that the overall temperature in the reactor is relatively uniform, the uniformity of the reaction is facilitated, and the service life of the catalyst is prolonged. However, the BDO hydrogenation reactor device disclosed in the patent has a complex structure, such as the use of a circulating pump, so that the energy consumption is increased and the equipment cost is increased.

Disclosure of utility model

The utility model provides a BDO isothermal hydrogenation reactor, which aims to solve the problems of complex structure, high energy consumption and high equipment investment cost of a BDO hydrogenation reactor device in the prior art.

In order to solve the technical problems, the utility model provides the following technical scheme:

the BDO isothermal hydrogenation reactor comprises an upper end enclosure, a lower end enclosure and a shell, wherein the lower end enclosure is provided with a liquid-phase material inlet and a gas-phase material inlet, the liquid-phase material inlet stretches into the reactor to be internally provided with a liquid-phase material distributor, the gas-phase material inlet stretches into the reactor to be internally provided with a gas distribution pipe, and the upper end enclosure is provided with a reaction material outlet;

A lower tube plate is arranged between the lower end socket and the shell, an upper tube plate is arranged between the upper end socket and the shell, a plurality of tubes are arranged between the lower tube plate and the upper tube plate in a penetrating manner, a baffle plate for changing the flow direction of liquid and a pull rod for fixing the position of the baffle plate are also arranged between the lower tube plate and the upper tube plate, and one end of the pull rod is fixedly arranged on the upper tube plate;

The reaction material outlet stretches into the pipeline outside the reactor and is provided with a cover barrel, the upper end of the cover barrel is fixedly arranged on the upper end socket, a baffle is arranged between the cover barrel and the upper tube plate, and the baffle is fixedly arranged on the upper end socket.

Further, a catalyst layer and a magnetic ball layer are arranged in the tube array, and a spring and a bolt for fixing the spring are arranged at the lower end of the magnetic ball layer.

Further, the magnetic sphere layer is below the catalyst layer.

Further, the upper end of the shell is provided with a shell side cooling material inlet, the lower end of the shell is provided with a shell side cooling material outlet, and the outer wall of the shell is symmetrically provided with two lug-shaped supports.

Further, the diameter of the reactor is 1.1-3.2 m.

Further, a plurality of air holes are formed in the gas distribution pipe.

Further, the lower tube plate is arranged between the shell and the lower seal head in a welding mode, and the upper tube plate is arranged between the shell and the upper seal head in a welding mode.

Further, the lower end socket is also provided with a lower manhole, and the upper end socket is also provided with a thermocouple interface and an upper manhole; the area of the baffle is larger than that of the lower port of the cover barrel.

Further, the reaction materials circulate in the tube array, and cooling water is arranged outside the tube array in the shell.

Further, the tubes are arranged in a rectangular shape in the shell.

The utility model has the following beneficial effects:

1. The utility model provides a BDO isothermal hydrogenation reactor of a fixed bed, which is provided with a liquid phase material distributor and a gas phase material distributor, so that reaction materials 1,4 butynediol and hydrogen can be uniformly distributed in the reactor; the upper tube plate and the lower tube plate are arranged between the tube arrays, so that the stability of the tube arrays in the reactor is better; the rectangular arrangement of the tubes plays a role in increasing the reaction space and increasing the air flow area on the basis of saving space, and the purposes of improving the flow and the cooling efficiency, and the baffle plate has the effect of increasing the flow velocity and the turbulence intensity between the tubes.

2. According to the fixed bed BDO isothermal hydrogenation reactor provided by the utility model, the arrangement of the cover barrel can maintain the stability of material extraction, and the arrangement of the baffle can avoid the influence on the catalyst layer during discharging.

3. The coking flue gas desulfurization liquid treatment device provided by the utility model has a simple integral structure and is suitable for popularization and use.

Drawings

FIG. 1 is a schematic diagram of the structure of a fixed bed BDO isothermal hydrogenation reactor of the utility model;

FIG. 2 is a schematic diagram of the structure of the inside of a tube array of a fixed bed BDO isothermal hydrogenation reactor of the utility model.

Reference numerals:

1. A liquid phase material inlet; 2. a liquid phase material distributor; 3. a gas phase material inlet; 4. a gas distribution pipe; 5. a lower end enclosure; 6. a lower tube sheet; 7. a shell side outlet; 8. an ear-type support; 9. a housing; 10. an upper tube sheet; 11. an upper end enclosure; 12. a baffle; 13. a cover barrel; 14. a reaction material outlet; 15. a thermocouple interface; 16. an upper manhole; 17. a shell side cooling material inlet; 18. a baffle plate; 19. a pull rod; 20. a tube array; 21. a lower manhole; 22. a spring; 23. a plug pin; 24. a catalyst layer; 25. and a ceramic ball layer.

Detailed Description

The technical scheme of the present utility model will be clearly and completely described in the following in connection with specific embodiments.

Example 1

The embodiment provides a fixed bed BDO isothermal hydrogenation reactor, as shown in fig. 1, which is disclosed by the utility model, and comprises an upper end enclosure 11 and a lower end enclosure 5 which can bear higher pressure, wherein the upper end enclosure 11 and the lower end enclosure 5 are spherical end enclosures, and the fixed bed BDO isothermal hydrogenation reactor also comprises a shell 9 between the upper end enclosure 11 and the lower end enclosure 5.

The lower seal head 5 is provided with a liquid-phase material inlet 1 and a gas-phase material inlet 3, the liquid-phase material inlet 13 stretches into the reactor and is internally provided with a liquid-phase material distributor 2, the gas-phase material inlet 3 stretches into the reactor and is internally provided with a gas distribution pipe 4, the gas distribution pipe 4 is provided with a plurality of air holes, the liquid-phase material inlet 1 of the fixed bed BDO isothermal hydrogenation reactor is filled with 1,4 butynediol reaction liquid of the reactor, the gas-phase material inlet 3 is filled with hydrogen, the 1,4 butynediol reaction liquid of the reactor is uniformly distributed in the lower seal head 5 through the liquid-phase material distributor 2, and the filled hydrogen uniformly contacts with the liquid material through the gas distribution pipe 4, so that the uniformity of the reaction material is ensured before entering the tube array 20.

A lower tube plate 6 is arranged between the lower seal head 5 and the shell 9, an upper tube plate 10 is arranged between the upper seal head 11 and the shell 9, the lower tube plate 5 is arranged between the shell 9 and the lower seal head 5 in a welding mode, and the upper tube plate 10 is arranged between the shell 9 and the upper seal head 11 in a welding mode.

A plurality of tubulars 20 are arranged between the lower tube plate 6 and the upper tube plate 10 in a penetrating way, and the tubulars 20 are distributed in a rectangular shape in the shell 9, so that the purposes of increasing the reaction space and the air flow area and improving the flow and cooling efficiency can be achieved on the basis of saving space in the shell 9, and the stable operation of equipment, the activity of a catalyst and the service life of the catalyst are guaranteed.

As shown in fig. 2, the tube array 20 is internally provided with a catalyst layer 24 and a magnetic ball layer 25, the catalyst layer 24 is filled with a catalyst, the magnetic ball layer 25 is filled with magnetic balls, and the magnetic ball layer 25 is positioned below the catalyst layer 24 and is used for supporting the catalyst layer 24. The lower end of the magnetic ball layer 25 is provided with a spring 22 and a plug 23 for fixing the spring 22, and the plug 23 can prevent the catalyst from falling from the inside of the tube array 20.

The shell 9 is internally provided with a baffle plate 18 for changing the flow direction of liquid and a pull rod 19 for fixing the position of the baffle plate 18, one end of the pull rod 19 is fixedly arranged on the upper tube plate 10 in a threaded mode, the baffle plate 18 is transversely arranged in the shell 9, the baffle plate 18 can prolong the flow path length of shell side media, increase the flow velocity among tubes and the turbulent flow intensity, achieve the aim of improving the heat transfer effect, and effectively relieve the stress condition of the tube array 20 and prevent vibration induced by the flow of the fluid. The interior circulation of shell and tube 20 is the reaction material, the circulation is cooling water between shell 9 and the shell and tube 20, the upper portion of shell 9 is equipped with shell side cooling material entry 17, the lower part of shell 9 is equipped with shell side cooling material export 7, consequently, in cooling water got into shell 9 through cooling material entry 17, finally cooling water was discharged through shell side cooling material export 7, and then reaches the purpose of controlling the reaction temperature in the reaction process, the outer wall of shell 9 still symmetry is equipped with two ear type support 8.

The upper seal head 11 is provided with a reaction material outlet 14, and the materials with sufficient reaction are discharged through the reaction material outlet 14 and enter the next working procedure for purification. The reaction material outlet 14 stretches into the pipeline overcoat inside the reactor and is equipped with the cover barrel 13, the upper end fixed mounting of cover barrel 13 is at head 11, and the purpose of cover barrel 13 is in order to stabilize the extraction of material, the below of cover barrel 13 is equipped with baffle 12, the area of baffle 12 is greater than the area of the port under the cover barrel 13, baffle 12 fixed mounting is at the inner wall of head 11, the purpose of baffle 12 is in order to avoid the influence to the catalyst bed when the ejection of compact.

In order to observe the temperature in the reaction process and ensure the catalytic activity of the catalyst to the greatest extent, a thermocouple interface 15 is arranged on the upper seal head 11, and a thermocouple is inserted into the tube array 20 through the thermocouple interface 15 to know the real-time reaction temperature. The lower end enclosure 5 is provided with a lower manhole 21, and the upper end enclosure 11 is provided with an upper manhole 16 for facilitating maintenance and filling of internals and catalysts. The diameter of the reactor is 1.1-3.2 m.

The reaction process of the specific materials in the reactor is as follows:

The 1,4 butynediol reaction liquid enters the reactor from the liquid-phase material inlet 1, and flows through each region of the downward seal head 5 uniformly through the liquid-phase material distributor 2, hydrogen enters the reactor from the gas-phase material inlet 3, and flows through the air holes on the gas distribution pipe 4 uniformly to each region of the downward seal head 5, in the lower seal head of the reactor, the hydrogen and the 1,4 butynediol reaction liquid are mixed uniformly, then the mixed and the reaction materials enter the tube nest 20 filled with the catalyst, the reaction materials are contacted with the catalyst for reaction, at the same time, cooling water enters the shell 9 from the cooling material inlet 17, the temperature of the reaction system in the tube nest 20 is controlled, the thermocouple knows the reaction temperature in the tube nest 20 in real time, the flow rate or the flow velocity of the cooling water entering the shell 9 is controlled through the temperature detected by the thermocouple, the purpose of controlling the optimal temperature of the reaction system is achieved, the reacted materials are discharged out of the reactor through the reaction material outlet 14, wherein the baffle 12 is completely shielded from the tube nest 20 below the cover barrel 13 above the upper tube plate 10, the baffle 13 is sleeved on the tube nest 14, the reaction materials are discharged into the reactor in sequence, the reaction materials are discharged from the reaction tube 12, and the reaction materials are discharged from the reaction tube is guaranteed.

It should be noted that the foregoing embodiments are merely illustrative of the technical concept and features of the present utility model, and the above, the below and the one end are all described corresponding to the drawings of the present utility model, and are not intended to limit the specific contents, so that those skilled in the art can understand the contents of the present utility model and implement the same, and the scope of the present utility model is not limited thereto. All equivalent changes or modifications made in accordance with the spirit of the present utility model should be construed to be included in the scope of the present utility model.

Claims

1. The BDO isothermal hydrogenation reactor comprises an upper end enclosure (11), a lower end enclosure (5) and a shell (9), and is characterized in that the lower end enclosure (5) is provided with a liquid-phase material inlet (1) and a gas-phase material inlet (3), the liquid-phase material inlet (1) stretches into the reactor to be internally connected with a liquid-phase material distributor (2), the gas-phase material inlet (3) stretches into the reactor to be internally connected with a gas distribution pipe (4), and the upper end enclosure (11) is provided with a reaction material outlet (14);

A lower tube plate (6) is arranged between the lower end enclosure (5) and the shell (9), an upper tube plate (10) is arranged between the upper end enclosure (11) and the shell (9), a plurality of tubes (20) are arranged between the lower tube plate (6) and the upper tube plate (10) in a penetrating way, a baffle plate (18) for changing the flow direction of liquid and a pull rod (19) for fixing the position of the baffle plate (18) are also arranged between the lower tube plate (6) and the upper tube plate (10), and one end of the pull rod (19) is fixedly arranged on the upper tube plate (10);

The reaction material outlet (14) stretches into a pipeline inside the reactor and is sleeved with a cover barrel (13), the upper end of the cover barrel (13) is fixedly arranged on the upper end enclosure (11), a baffle plate (12) is arranged between the cover barrel (13) and the upper tube plate (10), and the baffle plate (12) is fixedly arranged on the upper end enclosure (11).

2. The fixed bed BDO isothermal hydrogenation reactor according to claim 1, wherein a catalyst layer (24) and a magnetic ball layer (25) are arranged in the tube array (20), and a spring (22) and a bolt (23) for fixing the spring (22) are arranged at the lower end of the magnetic ball layer (25).

3. A fixed bed BDO isothermal hydrogenation reactor according to claim 2, wherein said magnetic sphere layer (25) is below the catalyst layer (24).

4. The fixed bed BDO isothermal hydrogenation reactor according to claim 1, wherein the upper part of the housing (9) is provided with a shell side cooling material inlet (17), the lower part of the housing (9) is provided with a shell side cooling material outlet (7), and the outer wall of the housing (9) is symmetrically provided with two ear-shaped supports (8).

5. The fixed bed BDO isothermal hydrogenation reactor of claim 1, wherein said reactor has a diameter of 1.1 to 3.2m.

6. The fixed bed BDO isothermal hydrogenation reactor according to claim 1, wherein the gas distribution pipe (4) is provided with a plurality of air holes.

7. The fixed bed BDO isothermal hydrogenation reactor according to claim 1, wherein said lower tube plate (6) is mounted between the shell (9) and the lower head (5) by means of welding, and said upper tube plate (10) is mounted between the shell (9) and the upper head (11) by means of welding.

8. The fixed bed BDO isothermal hydrogenation reactor according to claim 1, wherein the lower head (5) is further provided with a lower manhole (21), the upper head (11) is further provided with a thermocouple interface (15) and an upper manhole (16);

The area of the baffle (12) is larger than the area of the lower port of the cover barrel (13).

9. The fixed bed BDO isothermal hydrogenation reactor according to claim 1, wherein the tube array (20) is internally circulated with reactant materials, and the shell (9) and the tube array (20) are circulated with cooling water.

10. The fixed bed BDO isothermal hydrogenation reactor according to claim 1, wherein said array of tubes (20) are arranged in a rectangular shape within the shell (9).