Alcohol washing device for preparing dioctyl terephthalate

Abstract

The utility model discloses an alcohol washing device for preparing dioctyl terephthalate, which comprises an alcohol washing device and a flushing device, and the flushing device is arranged in the alcohol washing device. The alcohol washing device comprises an alcohol washing tank, a stirring motor, a stirring shaft, a transverse stirring blade and a support, the alcohol washing tank is arranged on the support, the stirring motor is installed at the top of the alcohol washing tank, a power rod is connected with the stirring shaft, and the stirring shaft is arranged in the alcohol washing tank and connected with the transverse stirring blade; the flushing device comprises a circulating pipe, a circulating pump, a three-way valve, a discharging pipe, an injection pipe and a filtering pipe, one end of the circulating pipe is connected with the middle of the alcohol washing tank, the other end of the circulating pipe is connected with the three-way valve, and the three-way valve is connected to the discharging pipe; the alcohol washing device for preparing the dioctyl terephthalate is simple in structure, convenient and practical, the bottom of the alcohol washing tank is subjected to accelerated impact through the flushing device, the purpose of improving the stirring efficiency is achieved, and meanwhile excessive foam is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of alcohol washing, and particularly relates to an alcohol washing device for preparing dioctyl terephthalate. Background Technique

[0002] The alcohol washing technology of dioctyl terephthalate (DOTP) is an important step in its preparation process for removing impurities, unreacted substances and by-products; the main purpose of alcohol washing is to improve the purity of DOTP, and impurities, unreacted alcohols (such as isooctanol) and other by-products in the reaction products are removed by means of dissolution and separation, which helps to ensure that the quality and performance of the DOTP product meet the relevant standards; impurities, solvent layer and DOTP product layer will be generated during the alcohol washing process, and the traditional method is to directly carry out static stratification or introduce it into a static tank for static stratification; in order to ensure the full mixing of the crude DOTP and the solvent, and at the same time avoid excessive foaming and energy consumption, it is necessary to control the stirring speed, but a slower stirring speed will also affect the stirring efficiency. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide an alcohol washing device for preparing dioctyl terephthalate, which has a simple structure, is convenient and practical, and accelerates the impact on the bottom of the alcohol washing tank through a flushing device, so as to achieve the purpose of improving the stirring efficiency and avoiding excessive foaming at the same time.

[0004] An alcohol washing device for preparing dioctyl terephthalate includes an alcohol washing device and a flushing device, and the flushing device is arranged in the alcohol washing device; the alcohol washing device includes an alcohol washing tank, a stirring motor, a stirring shaft, a horizontal stirring blade and a bracket, the alcohol washing tank is arranged on the bracket, the stirring motor is installed on the top of the alcohol washing tank and the power rod is connected with the stirring shaft, the stirring shaft is arranged in the alcohol washing tank and is connected with the horizontal stirring blade; the flushing device includes a circulation pipe, a circulation pump, a three-way valve, a discharge pipe, a spray pipe and a filter pipe, one end of the circulation pipe is connected with the middle part of the alcohol washing tank and the other end is connected with the three-way valve, the three-way valve is connected to the discharge pipe, the discharge pipe penetrates through the bottom of the alcohol washing tank and is connected with the spray pipe, a plurality of material guiding ports are arranged on the spray pipe, an arc-shaped sealing plate is hinged on the material guiding port, a plurality of spray holes are arranged on the arc-shaped sealing plate, and the filter pipe is arranged in the spray pipe and cooperates with the arc-shaped sealing plate.

[0005] Preferably, an annular filter ring is arranged on the inner wall of the alcohol washing tank and is communicated with the circulation pipe.

[0006] Preferably, a partition plate is arranged below the annular filter ring.

[0007] Preferably, a stirring frame is connected to the stirring shaft, a vertical stirring blade is connected to the stirring frame, and the vertical stirring blade is arranged on one side of the filter pipe.

[0008] Preferably, it includes a sealing valve, a flushing circulation pipe and a conversion three-way valve. An annular groove is provided at the bottom of the alcohol washing tank. The sealing valve is connected to the bottom of the alcohol washing tank and communicates with the annular groove. Both ends of the flushing circulation pipe are respectively connected to the sealing valve and the conversion three-way valve, and the conversion three-way valve is connected to the circulation pipe.

[0009] Beneficial effects:

[0010] (1) The alcohol washing device for preparing dioctyl terephthalate of the present invention has a simple structure, is convenient and practical. By accelerating the impact on the bottom of the alcohol washing tank through the flushing device, the purpose of improving the stirring efficiency is achieved while avoiding excessive generation of foam.

[0011] (2) The alcohol washing device for preparing dioctyl terephthalate of the present invention filters out impurities through the filter pipe, and at the same time introduces the impurities into the filter pipe through the flushing circulation pipe for backwashing, so as to quickly filter out the impurities and discharge them, achieving the purpose of automatically flushing the filter residue. Description of the drawings

[0012] Figure 1 is a schematic structural diagram of the alcohol washing device;

[0013] Figure 2 is a schematic structural diagram of the injection pipe;

[0014] Figure 3 is a schematic cross-sectional structural diagram of the injection pipe;

[0015] 1 - alcohol washing device, 11 - alcohol washing tank, 12 - stirring motor, 13 - stirring shaft, 14 - horizontal stirring blade, 15 - stirring frame, 16 - vertical stirring blade, 2 - flushing device, 21 - annular filter ring, 22 - circulation pipe, 23 - circulation pump, 24 - three-way valve, 25 - discharge pipe, 26 - injection pipe, 27 - filter pipe, 28 - feeding port, 29 - arc-shaped sealing plate, 210 - injection hole, 211 - annular groove, 212 - sealing valve, 213 - flushing circulation pipe, 214 - conversion three-way valve. Specific embodiments

[0016] The embodiments of the present invention will be further described below with reference to the drawings.

[0017] Embodiment 1

[0018] As Figures 1 to 3As shown in the figure; an alcohol washing device for preparing dioctyl terephthalate, which includes an alcohol washing device 1 and a flushing device 2, and the flushing device 2 is arranged inside the alcohol washing device 1; the alcohol washing device 1 includes an alcohol washing tank 11, a stirring motor 12, a stirring shaft 13, a horizontal stirring blade 14 and a bracket, the alcohol washing tank 11 is arranged on the bracket, the stirring motor 12 is installed on the top of the alcohol washing tank 11 and the power rod is connected to the stirring shaft 13, the stirring shaft 13 is arranged inside the alcohol washing tank 11 and is connected to the horizontal stirring blade 14; the flushing device 2 includes a circulation pipe 22, a circulation pump 23, a three-way valve 24, a discharge pipe 25, a spray pipe 26 and a filter pipe 27, one end of the circulation pipe 22 is connected to the middle of the alcohol washing tank 11 and the other end is connected to the three-way valve 24, the three-way valve 24 is connected to the discharge pipe 25, the discharge pipe 25 passes through the bottom of the alcohol washing tank 11 and is connected to the spray pipe 26, a number of material guiding openings 28 are opened on the spray pipe 26, an arc-shaped sealing plate 29 is hinged on the material guiding opening 28, a number of spray holes 210 are opened on the arc-shaped sealing plate 29, the filter pipe 27 is arranged inside the spray pipe 26 and cooperates with the arc-shaped sealing plate 29; an annular filter ring 21 is arranged on the inner wall of the alcohol washing tank 11 and is communicated with the circulation pipe 22; a partition plate is arranged on the lower side of the annular filter ring 21; a stirring frame 15 is connected to the stirring shaft 13, a vertical stirring blade 16 is connected to the stirring frame 15, and the vertical stirring blade 16 is arranged on one side of the filter pipe 27; it includes a sealing valve 212, a flushing circulation pipe 213 and a conversion three-way valve 214, an annular groove 211 is arranged at the bottom of the alcohol washing tank 11, the sealing valve 212 is connected to the bottom of the alcohol washing tank 11 and is communicated with the annular groove 211, both ends of the flushing circulation pipe 213 are respectively connected to the sealing valve 212 and the conversion three-way valve 214, and the conversion three-way valve 214 is connected to the circulation pipe 22.

[0019] Among them, the alcohol washing device 1 is an alcohol washing kettle in the prior art and will not be elaborated here. Specifically, turn on the circulation pump 23 so that the reaction liquid in the alcohol washing tank 11 sequentially passes through the annular filter ring 21, the circulation pipe 22, the three-way valve 24, and the discharge pipe 25 and enters the filter pipe 27, and then enters the injection pipe 26 from the filter pipe 27. The high-flow reaction liquid will make the arc-shaped sealing plate 29 stick to the material guiding port 28. At the same time, the reaction liquid is ejected through the injection holes 210 on the arc-shaped sealing plate 29, and the injection holes 210 impact the reaction liquid at the bottom of the alcohol washing tank 11 to achieve the stirring effect; when exporting the impurities in the alcohol washing tank 11, turn on the sealing valve 212 and switch the three-way valve 214 so that the reaction liquid and impurities in the annular groove 211 are sequentially introduced into the circulation pipe 22, the three-way valve 24, and the discharge pipe 25 through the flushing circulation pipe 213 and enter the filter pipe 27, so that the impurities in the alcohol washing tank 11 are filtered out by the filter pipe 27. When discharging the impurities in the filter pipe 27, switch the three-way valve 24 so that the cleaning liquid in the alcohol washing tank 11 and the impurities are exported together from the discharge pipe 25; the opening size of the arc-shaped sealing plate 29 needs to be controlled to avoid that the high-speed flowing reaction liquid cannot drive it to close. The opening size of the arc-shaped sealing plate 29 is mainly limited by the filter pipe 27; the vertical stirring blades 16 are provided mainly to ensure that when the filter pipe 27 is designed to be too long, the horizontal stirring blades 14 cannot be installed, in order to ensure the stirring effect of the reaction liquid; the lower side of the annular filter ring 21 is a partition plate to prevent the rising bubbles from entering the circulation pipe 22 again for recycling, and at the same time, the annular filter ring 21 can effectively isolate the generated foam.

[0020] The specific embodiments of the present invention have been described in detail above, but it is only an example, and the present invention is not limited to the above-described specific embodiments. For those skilled in the art, any equivalent modifications and substitutions to the present invention are also within the scope of the present invention. Therefore, equal transformations and modifications made without departing from the spirit and scope of the present invention are all covered by the present invention.

Claims

1. An alcohol washing device for preparing dioctyl terephthalate, characterized in that: It includes an alcohol washing device (1) and a rinsing device (2), and the rinsing device (2) is arranged inside the alcohol washing device (1); the alcohol washing device (1) includes an alcohol washing tank (11), a stirring motor (12), a stirring shaft (13), a horizontal stirring blade (14) and a bracket. The alcohol washing tank (11) is arranged on the bracket. The stirring motor (12) is installed on the top of the alcohol washing tank (11) and its power rod is connected to the stirring shaft (13). The stirring shaft (13) is arranged inside the alcohol washing tank (11) and is connected to the horizontal stirring blade (14); the rinsing device (2) includes a circulation pipe (22), a circulation pump (23), a three-way valve (24), a discharge pipe (25), a spray pipe (26) and a filter pipe (27). One end of the circulation pipe (22) is connected to the middle of the alcohol washing tank (11) and the other end is connected to the three-way valve (24). The three-way valve (24) is connected to the discharge pipe (25). The discharge pipe (25) passes through the bottom of the alcohol washing tank (11) and is connected to the spray pipe (26). A number of material guiding openings (28) are formed on the spray pipe (26). An arc-shaped sealing plate (29) is hinged on the material guiding opening (28). A number of spray holes (210) are formed on the arc-shaped sealing plate (29). The filter pipe (27) is arranged inside the spray pipe (26) and cooperates with the arc-shaped sealing plate (29).

2. The alcohol washing device for preparing dioctyl terephthalate according to claim 1, wherein: An annular filter ring (21) is arranged on the inner wall of the alcohol washing tank (11) and is communicated with the circulation pipe (22).

3. The alcohol washing device for preparing dioctyl terephthalate according to claim 2, wherein: A partition plate is arranged below the annular filter ring (21).

4. The alcohol washing device for preparing dioctyl terephthalate according to claim 3, characterized in that: A stirring frame (15) is connected to the stirring shaft (13), and a vertical stirring blade (16) is connected to the stirring frame (15). The vertical stirring blade (16) is arranged on one side of the filter pipe (27).

5. The alcohol washing device for preparing dioctyl terephthalate according to claim 4, wherein: It includes a sealing valve (212), a rinsing circulation pipe (213) and a conversion three-way valve (214). An annular groove (211) is arranged at the bottom of the alcohol washing tank (11). The sealing valve (212) is connected to the bottom of the alcohol washing tank (11) and is communicated with the annular groove (211). Both ends of the rinsing circulation pipe (213) are respectively connected to the sealing valve (212) and the conversion three-way valve (214). The conversion three-way valve (214) is connected to the circulation pipe (22).

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