Oxidation reactor for producing m-toluic acid

Abstract

The utility model discloses an oxidation reactor for production of m-toluic acid, and relates to the technical field of production of m-toluic acid, the oxidation reactor comprises a shell, an oxygen injection assembly and a reaction mixing assembly, the oxygen injection assembly is arranged at the lower part in the shell, and the oxygen injection assembly comprises an annular pipe, an oxygen pipe and an air hole; six groups of oxygen pipes are uniformly connected to the upper part of the annular pipe, air holes are formed in the outer surfaces of the oxygen pipes, and a reaction mixing assembly is mounted in the middle of the interior of the shell. According to the oxidation reactor for production of m-toluic acid, reciprocating lifting of a movable sleeve and a connecting rod enables a cleaning wiper on the inner wall of a lantern ring to clean the outer surface of an oxygen pipe on one hand, and reciprocating lifting of the connecting rod, a fixed plate, a rotating shaft and stirring blades on the other hand can promote vertical mixing of feed liquid in the shell, so that the feed liquid and oxygen are stirred and mixed; meanwhile, the water flow impacts the stirring blades, so that the rotating shaft and the stirring blades rotate to further mix and react the feed liquid and oxygen.

Description

Technical Field

[0001] The utility model relates to the technical field of m-toluic acid production, in particular to an oxidation reactor for m-toluic acid production. Background Art

[0002] Meta-toluic acid (M-Toluic acid) is a chemical substance, white to yellow prismatic crystals. In the production process of meta-toluic acid, the raw material meta-xylene is separated from mixed xylene, and the mixed xylene, catalyst and oxygen-containing gas need to be added to the oxidation reactor for reaction.

[0003] For example, the utility model with application number CN202122032019.2 discloses an oxidation reactor for the production of m-toluic acid. The oxidation reactor similar to the above application currently has the following shortcomings: although it can increase the mixing time of the oxygen-containing gas and the feed liquid, it does not have an additional mixing structure, resulting in poor mixing efficiency of oxygen and the feed liquid, which is not conducive to the sufficient mixing reaction of oxygen and the feed liquid.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and an oxidation reactor for the production of m-toluic acid is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide an oxidation reactor for producing m-toluic acid to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an oxidation reactor for producing m-toluic acid, comprising a shell, an oxygen injection component and a reaction mixing component, wherein the oxygen injection component is installed at the lower part of the interior of the shell, and the oxygen injection component comprises a ring tube, an oxygen tube and an air hole, six groups of oxygen tubes are evenly connected above the ring tube, and the outer surface of the oxygen tube is provided with an air hole, a reaction mixing component is installed in the middle of the interior of the shell, and the reaction mixing component comprises a screw, a movable sleeve, a connecting rod, a ring and a cleaning wipe, the screw is rotatably connected to the shell, and the outer side of the screw is provided with a movable sleeve, six groups of connecting rods are fixed to the outside of the movable sleeve, and a ring is fixed to the top of the connecting rod, the inner wall of the ring is provided with a cleaning wipe, and the ring is sleeved on the outer side of the oxygen tube.

[0007] Furthermore, a feed port is provided on the upper side of the shell, a discharge pipe is connected to the lower middle portion of the shell, and a pressure relief valve is installed on the upper outer side of the shell.

[0008] Furthermore, the oxygen injection assembly also includes an oxygen injection pipe, and the outer side of the annular tube is connected to the oxygen injection pipe, and the center of the annular tube coincides with the center of the shell.

[0009] Furthermore, the reaction mixing component also includes a slider, a slider is fixed to the side of the collar close to the inner wall of the shell, and the slider is connected to the shell in an up and down sliding manner, and a servo motor is installed at the top of the screw rod.

[0010] Furthermore, the reaction mixing assembly also includes a fixed plate, a rotating shaft and stirring blades. The fixed plate is welded to the lower side of the connecting rod, and one side of the fixed plate is rotatably connected to the rotating shaft, and the stirring blades are installed on the outer side of the rotating shaft.

[0011] Furthermore, a screw feeder is connected to one side of the exterior of the shell, and a catalyst feeding port is arranged on the upper side of the screw feeder.

[0012] The utility model provides an oxidation reactor for producing m-toluic acid, which has the following beneficial effects:

[0013] The utility model is provided with an oxygen injection component, which is convenient for injecting oxygen-containing gas into the interior of the ring tube through the oxygen injection pipe, so that six groups of oxygen pipes evenly connected on the upper side of the ring tube can send the oxygen-containing gas into the interior of the shell through the air holes, so that the oxygen-containing gas is easy to mix with the feed liquid, so as to facilitate the oxidation reaction in the production process of m-toluic acid, and the catalyst for the reaction is conveniently added into the interior of the screw feeder through the catalyst feeding port so as to feed the material into the shell, so as to facilitate the catalytic reaction.

[0014] The utility model is provided with a reaction mixing component, which can drive the rotation of the screw rod through a servo motor, so that the screw rod, the connecting rod and the ring move up and down, and drive the cleaning wiper on the inner wall of the ring to clean the outer surface of the oxygen tube. At the same time, the reciprocating lifting and lowering of the connecting rod, the fixing plate, the rotating shaft and the stirring blade can promote the upper and lower mixing of the feed liquid inside the shell, and then stir and mix the feed liquid and oxygen. At the same time, the water flow will impact the stirring blade to make the rotating shaft and the stirring blade rotate to further mix the feed liquid and oxygen. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the external structure of an oxidation reactor for producing m-toluic acid according to the utility model;

[0016] Figure 2 This is a schematic diagram of the internal half-section structure of an oxidation reactor for producing m-toluic acid according to the utility model;

[0017] Figure 3 The utility model is a schematic diagram of the structure of a reaction mixing component of an oxidation reactor for producing m-toluic acid.

[0018] In the figure: 1. Shell; 2. Feed inlet; 3. Oxygen injection assembly; 301. Ring tube; 302. Oxygen tube; 303. Air hole; 304. Oxygen injection tube; 4. Reaction mixing assembly; 401. Screw; 402. Moving sleeve; 403. Connecting rod; 404. Ring; 405. Cleaning wipe; 406. Slider; 407. Fixed plate; 408. Rotating shaft; 409. Stirring blade; 5. Servo motor; 6. Screw feeder; 7. Catalyst feeding port; 8. Discharge pipe; 9. Pressure relief valve. DETAILED DESCRIPTION

[0019] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0020] like Figure 1-Figure 2 As shown, an oxidation reactor for producing m-toluic acid comprises a shell 1, an oxygen injection assembly 3 and a reaction mixing assembly 4, wherein a feed port 2 is provided on the upper side of the shell 1, and a discharge pipe 8 is connected to the lower middle part of the shell 1, and a pressure relief valve 9 is installed on the upper outer side of the shell 1; an oxygen injection assembly 3 is installed at the lower inner part of the shell 1, and the oxygen injection assembly 3 comprises an annular tube 301, an oxygen tube 302 and an air hole 303, six groups of oxygen tubes 302 are evenly connected to the upper part of the annular tube 301, and the outer surface of the oxygen tube 302 is provided with an air hole 303, the oxygen injection assembly 3 also comprises an oxygen injection tube 304, an outer side of the annular tube 301 is connected to the oxygen injection tube 304, and the center of the annular tube 301 coincides with the center of the shell 1; a screw feeder 6 is connected to the outer side of the shell 1, and a catalyst feeding port 7 is provided on the upper side of the screw feeder 6;

[0021] The specific operation is as follows: the oxygen-containing gas is conveniently injected into the interior of the annular tube 301 through the oxygen injection pipe 304, and the oxygen-containing gas can enter the interior of the oxygen pipe 302. The center of the annular tube 301 coincides with the center of the shell 1 and the two are distributed in a concentric circle shape, so that the six groups of oxygen pipes 302 evenly connected on the upper side of the annular tube 301 can deliver the oxygen-containing gas to the interior of the shell 1 through the air holes 303, so that the oxygen-containing gas is easy to mix with the feed liquid, so as to facilitate the oxidation reaction in the production process of m-toluic acid. The catalyst for the reaction is conveniently added to the interior of the screw feeder 6 through the catalyst feeding port 7, and then fed into the shell 1, so as to facilitate the catalytic reaction.

[0022] like Figure 2-Figure 3As shown, a reaction mixing component 4 is installed in the middle of the shell 1, and the reaction mixing component 4 includes a screw 401, a movable sleeve 402, a connecting rod 403, a collar 404 and a cleaning wipe 405. The screw 401 is rotatably connected to the shell 1, and the outer side of the screw 401 is sleeved with a movable sleeve 402, six groups of connecting rods 403 are fixed to the outside of the movable sleeve 402, and the top of the connecting rod 403 is fixed with a collar 404, the inner wall of the collar 404 is provided with a cleaning wipe 405, and the collar 404 is sleeved on the oxygen tube 3 02; the reaction mixing component 4 also includes a slider 406, the slider 406 is fixed on one side of the collar 404 close to the inner wall of the shell 1, and the slider 406 is connected to the shell 1 for up and down sliding, and the top of the screw rod 401 is installed with a servo motor 5; the reaction mixing component 4 also includes a fixed plate 407, a rotating shaft 408 and a stirring blade 409, the lower side of the connecting rod 403 is welded with a fixed plate 407, and one side of the fixed plate 407 is rotatably connected with the rotating shaft 408, and the outer side of the rotating shaft 408 is installed with a stirring blade 409;

[0023] The specific operation is as follows: the servo motor 5 is used to drive the screw rod 401 to rotate. Since the ring 404 at the top of the six groups of connecting rods 403 is connected to the shell 1 by sliding up and down through the slider 406, the screw rod 401 can drive the outer movable sleeve 402 to move up and down, thereby making the connecting rod 403 and the ring 404 move up and down. At this time, the cleaning wipe 405 on the inner wall of the ring 404 can clean the outer surface of the oxygen tube 302. At the same time, the reciprocating lifting and lowering of the connecting rod 403, the fixing plate 407, the rotating shaft 408, and the stirring blade 409 can promote the mixing of the material liquid inside the shell 1, thereby stirring and mixing the material liquid and oxygen. At the same time, the water flow will impact the stirring blade 409 to make the rotating shaft 408 and the stirring blade 409 rotate to further mix the material liquid and oxygen.

[0024] In summary, if Figure 1-Figure 3As shown, the oxidation reactor for the production of m-toluic acid, when in use, can firstly add the feed liquid for production into the interior of the shell 1 through the feed inlet 2, and then inject the oxygen-containing gas into the interior of the ring tube 301 through the oxygen injection pipe 304, and allow the oxygen-containing gas to enter the interior of the oxygen pipe 302, so that the six groups of oxygen pipes 302 evenly connected on the upper side of the ring tube 301 can send the oxygen-containing gas into the interior of the shell 1 through the air holes 303. At this time, the shell 1 can be heated by winding an electromagnetic heating coil on the outer wall, a controller is installed on the outer wall of the shell 1, and a temperature sensor is installed in the shell 1, so as to facilitate the control of the heating temperature in the shell 1, and then the rotation of the screw rod 401 can be driven by the servo motor 5. Since the collar 404 at the top of the six groups of connecting rods 403 is connected to the shell 1 by sliding up and down through the slider 406, the screw rod 40 1 can drive the outer movable sleeve 402 to move up and down, thereby making the connecting rod 403 and the collar 404 move up and down. At this time, the cleaning wipe 405 on the inner wall of the collar 404 can clean the outer surface of the oxygen tube 302. At the same time, the reciprocating lifting of the connecting rod 403, the fixing plate 407, the rotating shaft 408, and the stirring blade 409 can promote the mixing of the feed liquid inside the shell 1, thereby stirring and mixing the feed liquid and the oxygen. At the same time, the water flow will impact the stirring blade 409 to make the rotating shaft 408 and the stirring blade 409 rotate to further mix the feed liquid and the oxygen. In this process, the reaction catalyst can also be added to the inside of the screw feeder 6 through the catalyst feeding port 7 to feed the material into the shell 1, which is convenient for the catalytic reaction. The pressure relief valve 9 can be used for pressure relief and exhaust. In this way, the use process of the oxidation reactor for the production of m-toluic acid is completed.

[0025] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. An oxidation reactor for producing m-toluic acid, comprising a shell (1), an oxygen injection component (3) and a reaction mixing component (4), characterized in that: An oxygen injection assembly (3) is installed at the lower part of the shell (1), and the oxygen injection assembly (3) includes a ring tube (301), an oxygen tube (302) and an air hole (303). Six groups of oxygen tubes (302) are evenly connected above the ring tube (301), and the outer surface of the oxygen tube (302) is provided with an air hole (303). A reaction mixing assembly (4) is installed in the middle of the shell (1), and the reaction mixing assembly (4) includes a screw rod (401), a movable sleeve (402), a connecting sleeve (403), and a connecting sleeve (404). The invention relates to a rod (403), a collar (404) and a cleaning wipe (405), wherein the screw rod (401) is rotatably connected to the housing (1), and a movable sleeve (402) is sleeved on the outer side of the screw rod (401), six groups of connecting rods (403) are fixed on the outside of the movable sleeve (402), and a collar (404) is fixed on the top of the connecting rod (403), a cleaning wipe (405) is arranged on the inner wall of the collar (404), and the collar (404) is sleeved on the outer side of the oxygen tube (302).

2. An oxidation reactor for producing m-toluic acid according to claim 1, characterized in that: The upper side of the shell (1) is provided with a feed port (2), the lower middle portion of the shell (1) is connected with a discharge pipe (8), and a pressure relief valve (9) is installed on the upper outer side of the shell (1).

3. An oxidation reactor for producing m-toluic acid according to claim 1, characterized in that: The oxygen injection assembly (3) further comprises an oxygen injection pipe (304), and the outer side of the ring pipe (301) is connected to the oxygen injection pipe (304), and the center of the ring pipe (301) coincides with the center of the shell (1).

4. The oxidation reactor for producing m-toluic acid according to claim 1, characterized in that: The reaction mixing component (4) further comprises a slider (406), the slider (406) being fixed to a side of the collar (404) close to the inner wall of the shell (1), and the slider (406) being connected to the shell (1) in an up-and-down sliding manner, and a servo motor (5) being installed at the top end of the screw rod (401).

5. The oxidation reactor for producing m-toluic acid according to claim 1, characterized in that: The reaction mixing component (4) also includes a fixed plate (407), a rotating shaft (408) and a stirring blade (409), the lower side of the connecting rod (403) is welded with the fixed plate (407), and one side of the fixed plate (407) is rotatably connected to the rotating shaft (408), and the stirring blade (409) is installed on the outer side of the rotating shaft (408).

6. The oxidation reactor for producing m-toluic acid according to claim 1, characterized in that: A screw feeder (6) is connected to one side of the exterior of the housing (1), and a catalyst feeding port (7) is provided on the upper side of the screw feeder (6).

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