CN215783241U

CN215783241U - Fixed bed catalytic reactor for synthesizing hydroquinone

Info

Publication number: CN215783241U
Application number: CN202122415214.3U
Authority: CN
Inventors: 陈绍杰; 黄德奇; 王芳
Original assignee: Yangzhou Polytechnic Institute
Current assignee: Yangzhou Huaji Environmental Protection Technology Co ltd
Priority date: 2021-10-08
Filing date: 2021-10-08
Publication date: 2022-02-11
Anticipated expiration: 2031-10-08

Abstract

The utility model discloses a fixed bed catalytic reactor for synthesizing hydroquinone, which comprises a reaction kettle, wherein a top cover is arranged at the top end of the reaction kettle, a plurality of supporting legs are arranged at the bottom end of the reaction kettle, a discharge pipe is arranged at the bottom of the reaction kettle, a supporting ring is fixed at the top end of the inner side wall of the reaction kettle, a fixed bed is arranged on the upper surface of the supporting ring, and catalyst particles are arranged in the fixed bed. According to the utility model, the reaction kettle, the top cover, the fixed pipe, the rotating pipe, the transverse pipe, the atomizing nozzle, the motor, the pressure pump and the fixed bed are arranged, so that synthesized raw material liquid can be sprayed out through the atomizing nozzle under the pressurization of the pressure pump, the transverse pipe and the atomizing nozzle are driven by the motor to rotate above the fixed bed at a constant speed, and the raw material liquid can be uniformly sprayed on the surface of the fixed bed, so that the raw material liquid can fully react with catalyst fillers in the fixed bed, the uniform temperature of each part of the surface of the fixed bed is ensured, and the synthesis efficiency is improved.

Description

Fixed bed catalytic reactor for synthesizing hydroquinone

Technical Field

The utility model relates to the technical field of hydroquinone synthesis, in particular to a fixed bed catalytic reactor for synthesizing hydroquinone.

Background

Hydroquinone, also known as hydroquinone, is an organic compound formed by substituting two para-hydrogens of benzene with hydroxyl groups, has a molecular formula of C6H6O2, is a white crystal, is mainly used for preparing black-and-white developers, anthraquinone dyes, azo dyes, rubber antioxidants, stabilizers and antioxidants, and has a plurality of modes for synthesizing hydroquinone, wherein one mode is to synthesize the hydroquinone through a fixed bed catalytic reactor.

However, the existing fixed bed catalytic reactor has poor heat transfer, when the reaction exotherm is large, a temperature runaway phenomenon can occur even in a tubular reactor, and if reactants are not uniformly distributed on the surface of a fixed bed, the temperature of each part on the surface of the fixed bed is not uniform, and the synthesis efficiency is also influenced, so that the utility model provides the fixed bed catalytic reactor for synthesizing hydroquinone.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art and provides a fixed bed catalytic reactor for synthesizing hydroquinone.

In order to achieve the purpose, the utility model adopts the following technical scheme: the utility model provides a fixed bed catalytic reactor for synthesizing hydroquinone, includes reation kettle, the reation kettle top is equipped with the top cap, the reation kettle bottom is equipped with a plurality of supporting legss, the reation kettle bottom is equipped with the discharging pipe, reation kettle inside wall top is fixed with the support ring, the support ring upper surface is equipped with the fixed bed, the inside catalyst granule that is equipped with of fixed bed, the inside top of reation kettle is equipped with cooling body, top cap roof middle part is equipped with fixed pipe, fixed socle end rotates and is connected with the rotation tube, top cap upper surface both sides are fixed with motor and force (forcing) pump respectively, rotation tube bottom one side is connected with violently the pipe, violently manage the lower surface and be equipped with a plurality of atomizer.

As a further description of the above technical solution:

the utility model discloses a reactor, including top cap, reation kettle, top cap and top cap, the top cap is connected with rotation connecting piece jointly with reation kettle one side, and the top cap rotates through rotation connecting piece with reation kettle to be connected, the equal fixedly connected with flange in one side of rotation connecting piece is kept away from to top cap and reation kettle, the bolt is worn to be equipped with in the flange inside, is convenient for open the top cap along the rotation connecting piece is rotatory to be favorable to changing the inside fixed bed of reation kettle.

As a further description of the above technical solution:

the rotating pipe is connected with the inner side wall of the bottom end of the fixed pipe in a sealing and rotating mode, and liquid leakage between the rotating pipe and the fixed pipe is prevented.

As a further description of the above technical solution:

motor drive end fixedly connected with pivot, the pivot passes inside the top cap roof extends to the top cap, and the pivot is located the inside one end fixedly connected with action wheel of top cap, the fixed cover in rotating tube surface has from the driving wheel, the action wheel has driving belt with follow the common cover in driving wheel surface, is convenient for drive the rotating tube through the motor and violently manage and rotate inside the top cap.

As a further description of the above technical solution:

the force (forcing) pump both ends are connected with feed liquor pipe and drain pipe respectively, the one end that the force (forcing) pump was kept away from to the drain pipe is linked together with fixed pipe top, is convenient for will react raw and other materials liquid through the force (forcing) pump, and the blowout is in pressurization to atomizer for reaction raw and other materials liquid can evenly spray on the fixed bed surface.

As a further description of the above technical solution:

the cooling mechanism comprises a coiled pipe, a water inlet pipe and a water outlet pipe, wherein the coiled pipe is positioned right above the fixed bed, so that the temperature on the surface of the fixed bed can be cooled conveniently.

As a further description of the above technical solution:

the inlet tube and outlet pipe all run through and are fixed in the reation kettle lateral wall, and the one end that inlet tube and outlet pipe are located reation kettle all is equipped with the adapter sleeve, the coiled pipe both ends all are linked together through adapter sleeve and inlet tube and outlet pipe, can dismantle the coiled pipe from this, prevent that the coiled pipe from hindering the dismantlement of fixed bed.

The utility model has the following beneficial effects:

1. the utility model provides a fixed bed catalytic reactor for synthesizing hydroquinone, be provided with reation kettle, the top cap, fixed pipe, the rotating tube, violently the pipe, atomizer, including a motor, an end cap, a controller, and a cover plate, the booster pump and fixed bed, when using this reactor synthesis hydroquinone, the pressurization that can pass through the booster pump passes through atomizer blowout with reaction raw and other materials liquid, and drive violently the pipe and atomizer at the uniform velocity of fixed bed top through the motor and rotate, thereby can evenly spray raw and other materials liquid on the fixed bed surface, make raw and other materials liquid can fully with the fixed bed in the catalyst filler reaction, and then guarantee that the temperature of every department of fixed bed surface is even, improve the synthesis efficiency.

2. A fixed bed catalytic reactor for synthesizing hydroquinone is provided with a cooling mechanism, the cooling mechanism comprises a serpentine pipe, a water inlet pipe, a water outlet pipe and a connecting sleeve, the cooling mechanism is arranged above a fixed bed, and when a reaction generates a large amount of heat, the surface temperature of the fixed bed can be reduced in a water cooling mode, so that a negative reaction caused by overhigh temperature is prevented.

Drawings

FIG. 1 is a perspective view of a fixed bed catalytic reactor for synthesizing hydroquinone in accordance with the present invention;

FIG. 2 is a main sectional view of a fixed-bed catalytic reactor for synthesizing hydroquinone according to the present invention;

FIG. 3 is a sectional top view of a fixed-bed catalytic reactor for synthesizing hydroquinone according to the present invention.

Illustration of the drawings:

1. a reaction kettle; 11. rotating the connecting piece; 12. a flange; 13. a bolt; 14. a discharge pipe; 2. a top cover; 21. a fixed tube; 22. rotating the tube; 221. a transverse tube; 222. an atomizing spray head; 223. a driven wheel; 23. a motor; 231. a rotating shaft; 232. a driving wheel; 24. a pressure pump; 3. supporting legs; 4. a support ring; 5. a fixed bed; 6. a cooling mechanism; 61. a serpentine tube; 62. a water inlet pipe; 63. a water outlet pipe; 64. a connecting sleeve.

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.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-3, one embodiment of the present invention is provided: the utility model provides a fixed bed catalytic reactor for synthesizing hydroquinone, including

reation kettle

1, 1 top of reation kettle is equipped with

top cap

2, 1 bottom of reation kettle is equipped with a plurality of supporting

legss

3, 1 bottom of reation kettle is equipped with discharging

pipe

14, 1 inboard wall top of reation kettle is fixed with

support ring

4, 4 upper surfaces of support ring are equipped with

fixed bed

5, 5 inside catalyst particles that are equipped with of fixed bed, 1 inside top of reation kettle is equipped with

cooling body

6, 2 roof middle parts of top cap are equipped with fixed pipe 21, fixed pipe 21 bottom is rotated and is connected with rotating-

tube

22, 2 upper surface both sides of top cap are fixed with motor 23 and force (forcing) pump 24 respectively, rotating-tube 22 bottom one side is connected with violently pipe 221, it is equipped with a plurality of atomizer 222 to violently manage the 221 lower surface. The rotating pipe 22 is connected with the inner side wall of the bottom end of the fixed pipe 21 in a sealing and rotating way. Top cap 2 is connected with rotation connecting piece 11 with 1 one side of reation kettle jointly, and top cap 2 rotates through rotation connecting piece 11 with reation kettle 1 to be connected, and top cap 2 keeps away from the equal fixedly connected with flange 12 in one side of rotation connecting piece 11 with reation kettle 1, and the bolt 13 is worn to be equipped with inside the flange 12. Two ends of the pressure pump 24 are respectively connected with a liquid inlet pipe and a liquid outlet pipe, and one end of the liquid outlet pipe far away from the pressure pump 24 is communicated with the top end of the fixed pipe 21.

The drive end of the motor 23 is fixedly connected with a rotating shaft 231, the rotating shaft 231 penetrates through the top wall of the top cover 2 and extends to the inside of the top cover 2, one end of the rotating shaft 231, which is located inside the top cover 2, is fixedly connected with a driving wheel 232, the surface of the rotating pipe 22 is fixedly sleeved with a driven wheel 223, and the surfaces of the driving wheel 232 and the driven wheel 223 are sleeved with a transmission belt together.

The cooling mechanism 6 includes a serpentine 61, a water inlet pipe 62 and a water outlet pipe 63, and the serpentine 61 is located right above the fixed bed 5. The inlet tube 62 and the outlet tube 63 are both fixed on the side wall of the reaction kettle 1 in a penetrating manner, and the ends of the inlet tube 62 and the outlet tube 63 in the reaction kettle 1 are both provided with a connecting sleeve 64, and the two ends of the coiled tube 61 are both communicated with the inlet tube 62 and the outlet tube 63 through the connecting sleeves 64.

The working principle is as follows: firstly, introducing reaction raw material liquid into a liquid inlet pipe on a pressure pump 24, leading the reaction liquid to enter the atomizing nozzle 222 through a rotating pipe 22 and a transverse pipe 221 by the pressurization of the pressure pump 24, then spraying the reaction raw material liquid on the surface of the fixed bed 5 through the atomizing nozzle 222, simultaneously starting the motor 23 to rotate, leading the motor 23 to drive a driven wheel 223 and the rotating pipe 22 to rotate through a driving wheel 232 and a transmission belt, leading the atomizing nozzle 222 to rotate above the fixed bed 5 at a constant speed, ensuring the uniform distribution of the reaction raw material liquid on the surface of the fixed bed 5, introducing cold water into a water inlet pipe 62 after the reaction starts, taking away high temperature generated by the surface reaction of the fixed bed 5 when the cold water flows through a coil pipe 61, and then discharging the cold water from a water outlet pipe 63 (here, a refrigerator can be connected between the water inlet pipe 62 and the water outlet pipe 63, refrigerating the water after heat exchange again, circularly sending the cold water into the coil pipe 61, water resources can be saved), and the liquid after reaction is discharged through the discharge pipe 14. When the catalyst particles in the fixed bed 5 need to be replaced, the bolts 13 on the flange 12 are screwed off, the top cover 2 is rotated to open, then the coiled pipe 61 is separated from the water inlet pipe 62 and the water outlet pipe 63 by rotating the connecting sleeve 64, the coiled pipe is detached from the upper part of the fixed bed 5, and then the fixed bed 5 is taken down from the surface of the supporting ring 4, so that the catalyst particles in the fixed bed 5 can be replaced.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.

Claims

1. A fixed bed catalytic reactor for synthesizing hydroquinone, comprising a reaction kettle (1), characterized in that: a top cover (2) is arranged at the top end of the reaction kettle (1), a plurality of supporting legs (3) are arranged at the bottom end of the reaction kettle (1), a discharge pipe (14) is arranged at the bottom of the reaction kettle (1), a support ring (4) is fixed at the top end of the inner side wall of the reaction kettle (1), the upper surface of the support ring (4) is provided with a fixed bed (5), catalyst particles are arranged in the fixed bed (5), the top end in the reaction kettle (1) is provided with a cooling mechanism (6), the middle part of the top wall of the top cover (2) is provided with a fixed pipe (21), the bottom end of the fixed pipe (21) is rotatably connected with a rotating pipe (22), both sides of the upper surface of the top cover (2) are respectively fixed with a motor (23) and a pressure pump (24), one side of the bottom end of the rotating pipe (22) is connected with a transverse pipe (221), and the lower surface of the transverse pipe (221) is provided with a plurality of atomizing nozzles (222).

2. A fixed-bed catalytic reactor for the synthesis of hydroquinone according to claim 1, characterized in that: top cap (2) and reation kettle (1) one side are connected with rotation connecting piece (11) jointly, and top cap (2) and reation kettle (1) rotate through rotating connecting piece (11) and be connected, top cap (2) and reation kettle (1) keep away from the equal fixedly connected with flange (12) in one side of rotating connecting piece (11), bolt (13) are worn to be equipped with in flange (12) inside.

3. A fixed-bed catalytic reactor for the synthesis of hydroquinone according to claim 1, characterized in that: the rotating pipe (22) is connected with the inner side wall of the bottom end of the fixed pipe (21) in a sealing and rotating mode.

4. A fixed-bed catalytic reactor for the synthesis of hydroquinone according to claim 1, characterized in that: motor (23) drive end fixedly connected with pivot (231), pivot (231) pass top cap (2) roof and extend to top cap (2) inside, and pivot (231) are located top cap (2) inside one end fixedly connected with action wheel (232), the fixed cover in rotating tube (22) surface has connect from driving wheel (223), action wheel (232) and follow driving wheel (223) surface overlap jointly have driving belt.

5. A fixed-bed catalytic reactor for the synthesis of hydroquinone according to claim 1, characterized in that: the two ends of the pressure pump (24) are respectively connected with a liquid inlet pipe and a liquid outlet pipe, and one end of the liquid outlet pipe, which is far away from the pressure pump (24), is communicated with the top end of the fixed pipe (21).

6. A fixed-bed catalytic reactor for the synthesis of hydroquinone according to claim 1, characterized in that: the cooling mechanism (6) comprises a coiled pipe (61), a water inlet pipe (62) and a water outlet pipe (63), and the coiled pipe (61) is positioned right above the fixed bed (5).

7. A fixed-bed catalytic reactor for the synthesis of hydroquinone according to claim 6, characterized in that: inlet tube (62) and outlet pipe (63) all run through and are fixed in reation kettle (1) lateral wall, and inlet tube (62) and outlet pipe (63) are located reation kettle (1) one end all and are equipped with adapter sleeve (64), coiled pipe (61) both ends all are linked together through adapter sleeve (64) and inlet tube (62) and outlet pipe (63).