Methyl tetrahydrophthalic anhydride recovery device

Abstract

The utility model discloses a methyl tetrahydrophthalic anhydride recovery device, which belongs to the technical field of methyl tetrahydrophthalic anhydride recovery, aims at solving the problems that the raw material recovery rate is low and condensed methyl tetrahydrophthalic anhydride is difficult to completely enter an isomerization distillation device, and comprises a recovery barrel body which further comprises an isomerization distillation kettle, the isomerization distillation still is arranged on one side of the recycling barrel body, a bottom plate is fixed to the side wall of the bottom end of the recycling barrel body, the isomerization distillation still is fixed to the side wall of the top end of the bottom plate, and a liquid inlet pipe communicated with the interior is fixed to the side wall of one side of the isomerization distillation still; according to the device disclosed by the utility model, through the arrangement of the recovery assembly, the petroleum fraction mixed C5 can be more comprehensively recovered and reused, the situation that the petroleum fraction mixed C5 is wasted during distillation processing is avoided, the liquid and substance recovery effect is better, the methyl tetrahydrophthalic anhydride recovery time is greatly shortened, and the practicability is stronger.

Description

Technical Field

[0001] The utility model belongs to the technical field of methyltetrahydrophthalic anhydride recovery, and specifically relates to a methyltetrahydrophthalic anhydride recovery device. Background Art

[0002] Methyltetrahydrophthalic anhydride is a chemical substance with the molecular formula C9H10O3. It is an excellent organic solvent with a wide range of uses, mainly in the electronics, medicine, dyes, fragrances, cosmetics, paints, coatings, inks, electroplating and other industries. When producing methyltetrahydrophthalic anhydride, the raw materials maleic anhydride and petroleum fraction mixed carbon five are synthesized in a synthesis reactor, and most of the unreacted petroleum fraction mixed carbon five is distilled out, and then the crude methyltetrahydrophthalic anhydride is transferred to the isomerization reactor for isomerization.

[0003] At present, in order to improve the processing efficiency, excessive raw materials such as petroleum distillate mixed carbon five are often added during the processing. After the reaction is completed, a certain amount of petroleum distillate mixed carbon five components will exist in the isomerization kettle, and other components in the petroleum distillate mixed carbon five need to be completely removed by distillation. However, during the use of the existing device, the petroleum distillate mixed carbon five components are directly distilled out into a buffer tank by decompression, and are regularly discharged to a wastewater station for treatment. This method wastes a lot of raw materials, and a lot of methyltetrahydrophthalic anhydride products are taken out during the distillation process, resulting in a decrease in product yield. At the same time, in order to ensure the product yield, a low temperature is often used during isomerization to remove a small amount of high-boiling petroleum distillates, but these distillates cannot be quickly distilled out at a low temperature.

[0004] Therefore, a methyltetrahydrophthalic anhydride recovery device is needed to solve the problems in the prior art of low raw material recovery rate and difficulty in completely allowing condensed methyltetrahydrophthalic anhydride to enter the isomerization distillation device. Utility Model Content

[0005] The utility model aims to provide a methyltetrahydrophthalic anhydride recovery device to solve the problems raised in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical solution: a methyltetrahydrophthalic anhydride recovery device, comprising a recovery cylinder body, the recovery cylinder body also includes

[0007] An isomerization distillation kettle, which is arranged on one side of the recovery cylinder body, a bottom plate is fixed to the side wall of the bottom end of the recovery cylinder body, the isomerization distillation kettle is fixed to the side wall of the top end of the bottom plate, a liquid inlet pipe connected to the interior is fixed to the side wall of one side of the isomerization distillation kettle, a connected pipe a is fixed between the recovery cylinder body and the isomerization distillation kettle, and a recovery component compatible with the pipe a is arranged on one side of the recovery cylinder body.

[0008] It should be noted that the recycling component includes

[0009] A pair of connecting pipes, the connecting pipes are fixed to the inner side wall of the recovery cylinder body, a plurality of through holes distributed in a circumference are opened on one side wall of the connecting pipe, a connected pipe b is fixed to one side wall of the pipe a, the other end of the pipe b is connected to the inside of the recovery cylinder body, a matching one-way valve a is provided on the outer surface of the pipe a, and a matching one-way valve b is provided on the outer surface of the pipe b;

[0010] A bracket, the bracket is fixed to the inner side wall of the recovery cylinder body, a waterproof motor is fixed to the top side wall of the bracket, a rotating shaft is coaxially fixed to one end of the output shaft of the waterproof motor, the rotating shaft is rotatably connected to the side wall of one side of the bracket, a rotating wheel is tightly sleeved on the outer surface of the rotating shaft, a piston is slidably connected to the inner side of the butt joint tube, a connecting rod is hinged on one side of the piston, and one end of the connecting rod is rotatably connected to the side wall of one side of the rotating wheel;

[0011] A mounting frame is fixed to the outer side wall of the recovery cylinder body, a water pump is fixed to one side wall of the mounting frame, an extraction pipe connected to the input end of the water pump and the recovery cylinder body is fixed, and an output pipe connected to the output end of the water pump and the isomerization distillation kettle is fixed.

[0012] It is further worth mentioning that an isolation tube is fixed to the inner side wall of the recovery tube body, the isolation tube is located directly below the docking tube, and the top side wall of the isolation tube is arranged in a chamfered inclined surface.

[0013] It should be further explained that a condenser is fixed to the outer side wall of the recovery cylinder. The condenser is wound in a ring shape and distributed on the outer side of the isolation cylinder. The central axis of the isolation cylinder is collinear with the central axis of the recovery cylinder.

[0014] As a preferred embodiment, a matching valve is provided on the outer surface of the extraction tube, and the inner side wall of the bottom end of the recovery cylinder body is provided with a chamfered inclined surface.

[0015] As a preferred embodiment, the diameter of the butt joint is greater than the diameter of the pipe a, the central axis of the butt joint is collinear with the central axis of the pipe a, and the angle between the pipe b and the pipe a is a right angle.

[0016] Compared with the prior art, the methyltetrahydrophthalic anhydride recovery device provided by the utility model has at least the following beneficial effects:

[0017] (1) Through the setting of the recovery component, the mixed carbon five of petroleum distillates can be recovered and reused more comprehensively, avoiding the waste of mixed carbon five of petroleum distillates during distillation processing. It has a good effect on the recovery of liquids and materials, and can greatly improve the efficiency of the recovery of mixed carbon five of petroleum distillates, and is highly practical.

[0018] (2) By setting up the condenser, the gas condensation rate inside the recovery cylinder body can be accelerated, and the recovery time of methyltetrahydrophthalic anhydride can be greatly shortened. In addition, by coordinating the setting of the water pump, the extraction pipe and the output pipe, the recovered methyltetrahydrophthalic anhydride can be quickly and comprehensively directed to the inside of the isomerization distillation kettle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the partial main cross-sectional structure of the utility model;

[0021] Figure 3 It is a schematic diagram of the main cross-sectional structure of the utility model;

[0022] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of area A in the middle.

[0023] In the figure: 1. Recovery cylinder body; 2. Heterogeneous distillation kettle; 3. Bottom plate; 4. Liquid inlet pipe; 5. Pipe a; 6. Recovery component; 61. Butt pipe; 62. Through hole; 63. Pipe b; 64. One-way valve a; 65. One-way valve b; 66. Bracket; 67. Waterproof motor; 68. Rotating shaft; 69. Rotor; 610. Piston; 611. Connecting rod; 612. Mounting frame; 613. Water pump; 614. Extraction pipe; 615. Output pipe; 7. Isolation cylinder; 8. Condenser; 9. Valve. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with embodiments.

[0025] See also Figure 1-4 The utility model provides a methyltetrahydrophthalic anhydride recovery device, including a recovery cylinder body 1, the recovery cylinder body 1 also includes an isomerization distillation kettle 2, the isomerization distillation kettle 2 is arranged on one side of the recovery cylinder body 1, a bottom plate 3 is fixed to the side wall of the bottom end of the recovery cylinder body 1, the isomerization distillation kettle 2 is fixed to the top side wall of the bottom plate 3, a liquid inlet pipe 4 connected to the inside is fixed to the side wall of one side of the isomerization distillation kettle 2, a connected pipeline a5 is fixed between the recovery cylinder body 1 and the isomerization distillation kettle 2, and a recovery component 6 adapted to the pipeline a5 is arranged on one side of the recovery cylinder body 1.

[0026] Further Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it is worth specifically explaining that the recovery component 6 includes a pair of connecting pipes 61, the connecting pipes 61 are fixed to the inner side wall of the recovery cylinder body 1, and a plurality of through holes 62 are arranged on one side wall of the connecting pipe 61. A connected pipe b63 is fixed to one side wall of the pipe a5, and the other end of the pipe b63 is connected to the inside of the recovery cylinder body 1. A matching one-way valve a64 is arranged on the outer surface of the pipe a5, and a matching one-way valve b65 is arranged on the outer surface of the pipe b63; a bracket 66, the bracket 66 is fixed to the inner side wall of the recovery cylinder body 1, and a waterproof motor 67 is fixed to the top side wall of the bracket 66. A rotating shaft 68 is coaxially fixed to one end of the output shaft of the waterproof motor 67. The rotating shaft 68 is rotatably connected to the side wall of one side of the bracket 66, and a rotating wheel 69 is tightly sleeved on the outer surface of the rotating shaft 68. The inner side of the connecting pipe 61 slides A piston 610 is movably connected, a connecting rod 611 is hinged on one side of the piston 610, and one end of the connecting rod 611 is rotatably connected to the side wall of one side of the rotor 69; a mounting frame 612, the mounting frame 612 is fixed to the outer side wall of the recovery cylinder body 1, a water pump 613 is fixed to the side wall of one side of the mounting frame 612, an extraction pipe 614 is fixed between the input end of the water pump 613 and the recovery cylinder body 1, and an output pipe 615 is fixed between the output end of the water pump 613 and the isomerization still 2. Through the setting of the recovery component 6, the mixed carbon five of the petroleum distillate can be more comprehensively recovered and reused, avoiding the waste of the mixed carbon five of the petroleum distillate during the distillation process, having a better effect on the recovery of liquids and materials, and can greatly improve the efficiency of the recovery of the mixed carbon five of the petroleum distillate, and has strong practicality.

[0027] Further as Figure 2 and Figure 3 As shown, it is worth explaining in detail that an isolation tube 7 is fixed to the inner side wall of the recovery tube body 1, and the isolation tube 7 is located directly below the docking tube 61. The top side wall of the isolation tube 7 is provided with a chamfered slope. Through the provision of the isolation tube 7, the spacing of the gas during refrigeration conduction is further shortened, and the provision of the chamfered slope ensures that when the gas condenses into water, it can be smoothly guided to the bottom position of the recovery tube body 1.

[0028] This scheme has the following working process: when methyltetrahydrophthalic anhydride needs to be recovered and processed, the mixed carbon five components of the petroleum distillate produced in the isomerization distillation kettle 2 are captured by the pipeline a5, and the rotating shaft 68 is driven by the waterproof motor 67 to rotate synchronously, driving the rotating wheel 69 to rotate synchronously, and the piston 610 is driven by the connecting rod 611 to move up and down reciprocatingly along the butt joint pipe 61 after being subjected to force, so as to pump and pressurize the butt joint pipe 61 and the pipeline a5, so that the mixed carbon five components of the petroleum distillate enter into the butt joint pipe 61, until the piston 610 moves to the lower dead point position, so that the mixed carbon five components of the petroleum distillate flow into the inside of the recovery tower body through the through hole 62, when the piston 610 moves to the upper dead point position, the one-way valve a64 is in a closed state, and the one-way valve b65 is in an open state, so that the gas refluxes into the inside of the recovery cylinder body 1, and the inside of the recovery cylinder body 1 is continuously cooled through the condenser 8, so as to achieve the purpose of recovery during the processing of methyltetrahydrophthalic anhydride.

[0029] According to the above working process, it can be known that: through the setting of the recovery component 6, the mixed carbon five of the petroleum distillate can be more comprehensively recovered and reused, avoiding the waste of the mixed carbon five of the petroleum distillate during the distillation process, and the recovery effect of liquids and materials is better, and the recovery efficiency of the mixed carbon five of the petroleum distillate can be greatly improved. It is highly practical, and through the setting of the condenser 8, the gas condensation speed inside the recovery cylinder body 1 can be accelerated, and the recovery time of methyltetrahydrophthalic anhydride can be greatly shortened. In combination with the setting of the water pump 613, the extraction pipe 614 and the output pipe 615, the recovered methyltetrahydrophthalic anhydride can be quickly and comprehensively diverted to the inside of the isomerization still 2.

[0030] Further Figure 3 As shown, it is worth explaining in detail that a condenser tube 8 is fixed to the outer side wall of the recovery cylinder, and the condenser tube 8 is annularly wound and distributed on the outside of the isolation cylinder 7. The central axis of the isolation cylinder 7 is colinearly arranged with the central axis of the recovery cylinder. Through the arrangement of the condenser tube 8, the gas condensation speed inside the recovery cylinder body 1 can be accelerated, and the recovery time of methyltetrahydrophthalic anhydride can be greatly shortened.

[0031] Further Figure 3 As shown, it is worth specifically explaining that a matching valve 9 is provided on the outer surface of the extraction pipe 614, and the inner wall of the bottom end of the recovery cylinder body 1 is provided with a chamfered slope. Through the arrangement of the valve 9 and the extraction pipe 614, the liquid recovered and stored in the recovery cylinder body 1 can be more comprehensively diverted to the interior of the isomerization distillation kettle 2, thereby greatly improving the recovery rate of methyltetrahydrophthalic anhydride.

[0032] Further Figure 2 and Figure 3As shown, it is worth mentioning that the diameter of the butt-joint pipe 61 is greater than the diameter of the pipe a5, the central axis of the butt-joint pipe 61 is collinear with the central axis of the pipe a5, and the angle between the pipe b63 and the pipe a5 is at a right angle. Through the setting of the pipe b63, it is ensured that the pipe b63 is in a relatively stable state when the gas is refluxed.

[0033] In summary: by setting the isolation cylinder 7, the distance between the gases during refrigeration conduction is further shortened, and by using the setting of the chamfered surface, it is ensured that when the gas condenses into water state, it can be smoothly diverted to the bottom position of the recovery cylinder body 1, and by setting the condenser 8, the gas condensation speed inside the recovery cylinder body 1 can be accelerated, and the recovery time of methyltetrahydrophthalic anhydride can be greatly shortened. By setting the valve 9 and the extraction pipe 614, the liquid recovered and stored in the recovery cylinder body 1 can be more comprehensively diverted to the inside of the isomerization still 2, thereby greatly improving the recovery rate of methyltetrahydrophthalic anhydride. By setting the pipeline b63, it is ensured that the pipeline b63 is in a relatively stable state when the gas is refluxed.

[0034] The waterproof motor 67 and the condenser 8 can both be purchased on the market. Both the waterproof motor 67 and the condenser 8 are equipped with a power supply, which is a mature technology in this field and has been fully disclosed, so they are not repeated in the specification.

Claims

1. A methyltetrahydrophthalic anhydride recovery device, comprising a recovery cylinder body (1), characterized in that: The recovery cylinder body (1) also includes An isomerization still (2), the isomerization still (2) being arranged on one side of the recovery cylinder body (1), the bottom side wall of the recovery cylinder body (1) being fixed with a bottom plate (3), the isomerization still (2) being fixed to the top side wall of the bottom plate (3), a liquid inlet pipe (4) being connected to the inside being fixed to one side wall of the isomerization still (2), a pipeline a (5) being connected between the recovery cylinder body (1) and the isomerization still (2), a recovery component (6) being matched with the pipeline a (5) being arranged on one side of the recovery cylinder body (1), the recovery component (6) comprising A pair of connecting pipes (61), the connecting pipes (61) being fixed to the inner side wall of the recovery tube body (1), a plurality of through holes (62) being arranged in a circumferential distribution on one side wall of the connecting pipe (61), a connecting pipe b (63) being fixed to one side wall of the pipe a (5), the other end of the pipe b (63) being arranged in communication with the inside of the recovery tube body (1), a matching one-way valve a (64) being arranged on the outer surface of the pipe a (5), and a matching one-way valve b (65) being arranged on the outer surface of the pipe b (63); A bracket (66), the bracket (66) is fixed to the inner side wall of the recovery cylinder body (1), a waterproof motor (67) is fixed to the top side wall of the bracket (66), a rotating shaft (68) is coaxially fixed to one end of the output shaft of the waterproof motor (67), the rotating shaft (68) is rotatably connected to the side wall of one side of the bracket (66), a rotating wheel (69) is tightly sleeved on the outer surface of the rotating shaft (68), a piston (610) is slidably connected to the inner side of the docking tube (61), a connecting rod (611) is hinged to one side of the piston (610), and one end of the connecting rod (611) is rotatably connected to the side wall of one side of the rotating wheel (69); A mounting frame (612) is fixed to the outer side wall of the recovery cylinder body (1), a water pump (613) is fixed to one side wall of the mounting frame (612), an extraction pipe (614) connected to the recovery cylinder body (1) is fixed between the input end of the water pump (613), and an output pipe (615) connected to the isomerization still (2) is fixed between the output end of the water pump (613).

2. A methyltetrahydrophthalic anhydride recovery device according to claim 1, characterized in that: An isolation cylinder (7) is fixed to the inner side wall of the recovery cylinder body (1), the isolation cylinder (7) is located directly below the butt joint tube (61), and the top end side wall of the isolation cylinder (7) is arranged in the form of a chamfered inclined surface.

3. A methyltetrahydrophthalic anhydride recovery device according to claim 2, characterized in that: A condenser tube (8) is fixed to the outer side wall of the recovery tube. The condenser tube (8) is wound in a ring shape and distributed outside the isolation tube (7). The central axis of the isolation tube (7) is arranged in a colinear relationship with the central axis of the recovery tube.

4. A methyltetrahydrophthalic anhydride recovery device according to claim 3, characterized in that: The outer surface of the extraction pipe (614) is provided with a matching valve (9), and the inner side wall of the bottom end of the recovery cylinder body (1) is provided with a chamfered inclined surface.

5. A methyltetrahydrophthalic anhydride recovery device according to claim 4, characterized in that: The diameter of the butt-joint pipe (61) is greater than the diameter of the pipe a (5), the central axis of the butt-joint pipe (61) is collinear with the central axis of the pipe a (5), and the angle between the pipe b (63) and the pipe a (5) is a right angle.

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