Efficient tertiary amine production device

Abstract

The utility model relates to the technical field of tertiary amine production, in particular to an efficient tertiary amine production device. The efficient tertiary amine production device comprises a pre-heating tank, the pre-heating tank is connected with a crystallizer through a reaction kettle, the crystallizer is connected with a rectifying tower through a filter, a pre-heating tank coil pipe is arranged in the pre-heating tank, a crystallizer coil pipe is arranged in the crystallizer, and the crystallizer coil pipe is connected with the pre-heating tank coil pipe through a connecting pipeline. According to the device, the preheating tank and the crystallizer coil pipe are matched for use, and waste heat in the crystallizer is used for heating methanol in the preheating tank, so that the energy utilization rate is increased, meanwhile, the problem between raw materials and reaction liquid is greatly reduced, and the reaction stability is improved; the liquid phase in the rectifying tower is partially introduced into the filter, so that not only is the filtering efficiency improved, but also the generation of wastewater is avoided, and the production cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of tertiary amine production, in particular to a high-efficiency tertiary amine production device. Background Art

[0002] Tertiary amines are a type of amine compound. Amine compounds are products resulting from the replacement of the hydrogen atoms in ammonia (NH3) molecules with hydrocarbon groups. Tertiary amines are generally soluble in organic solvents such as ethanol, ether, and benzene. Tertiary amines are important intermediates in organic synthesis and are key raw materials in the synthesis of quaternary ammonium salts.

[0003] In the actual production process, the raw materials of tertiary amines are methanol and ammonia, and the reaction temperature is also relatively high. However, when the existing device continuously prepares tertiary amines, methanol is directly added to the reactor, which leads to a large temperature difference between the raw materials and the reaction liquid, which has a great impact on the stability of the reaction and is not conducive to improving the product quality. Moreover, after the product crystallization is completed, the existing device often needs to flush water to flush the blockage when filtering it, which generates a large amount of wastewater and increases production costs. Utility Model Content

[0004] In view of the above deficiencies in the prior art, the purpose of the present invention is to provide an efficient production device for tertiary amines. By using a pre-heating tank and a crystallizer coil in combination, the waste heat in the crystallizer is used to heat the methanol in the pre-heating tank. While improving energy utilization, the problems between the raw materials and the reaction liquid are greatly reduced, and the stability of the reaction is improved. By partially introducing the liquid phase in the distillation tower into the filter, not only the filtration efficiency is improved, but also the generation of wastewater is avoided, thereby saving production costs.

[0005] The utility model is realized by adopting the following technical solutions:

[0006] The high-efficiency tertiary amine production device includes a preheating tank, which is connected to a crystallizer through a reactor, and the crystallizer is connected to a distillation tower through a filter. A preheating tank coil is provided inside the preheating tank, and a crystallizer coil is provided inside the crystallizer. The crystallizer coil is connected to the preheating tank coil through a connecting pipe.

[0007] The pre-heating tank is equipped with a stirring device inside, and the pre-heating tank coil is located outside the stirring device. The crystallizer coil is used to control the temperature of the crystallizer.

[0008] The reactor is provided with a stirrer driven by a stirring motor, a gas phase distributor is provided below the stirrer, and a gas outlet is provided on the gas phase distributor.

[0009] A reactor temperature control jacket is provided on the outside of the reactor, a gas phase distributor is connected to a gas phase inlet pipeline, and a pre-heating device is provided on the gas phase inlet pipeline.

[0010] The crystallizer coil is connected to a heat transfer fluid inlet pipe.

[0011] A condensate collecting tank is provided on the distillation tower, and a reboiler is provided below the distillation tower.

[0012] The distillation tower is provided with an outlet pipe, which is connected to the filter via a flushing pipe. An insulation device is provided on the outside of the filter. All pipes in the high-efficiency tertiary amine production device are provided with insulation layers.

[0013] The working principle of this utility model is:

[0014] After the liquid raw material is heated in the preheating tank, it enters the reactor through a pipeline. The agitator and reactor temperature control jacket start working, and the gas phase is dispersed into the reactor through the gas phase distributor. After the reaction is completed, the product enters the crystallizer, and the crystallizer coil starts working. After the crystallization process is completed, it enters the distillation tower through the filter for treatment. The reboiler starts working. After the distillation tower treatment is completed, the liquid phase enters the next device through the distillation tower pipe. The high-temperature liquid phase in the crystallizer coil enters the preheating tank coil through a connecting pipe to heat the raw material. When the filter efficiency decreases, it is flushed through the flushing pipe. Among them, a stirring device is installed inside the preheating tank, and the preheating tank coil is located outside the stirring device. The crystallizer coil is used to control the temperature of the crystallizer.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] By adopting the high-efficiency tertiary amine production device of the utility model, the waste heat in the crystallizer is used to heat the methanol in the pre-heating tank through the coordinated use of the pre-heating tank and the crystallizer coil. While improving the energy utilization rate, the problems between the raw materials and the reaction liquid are greatly reduced, and the stability of the reaction is improved. By partially introducing the liquid phase in the distillation tower into the filter, not only the filtration efficiency is improved, but also the generation of wastewater is avoided, thereby saving production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of the utility model's efficient tertiary amine production device;

[0018] In the figure: 1. Preheating tank; 2. Reactor; 3. Crystallizer; 4. Distillation tower; 5. Preheating tank coil; 6. Agitator; 7. Gas distributor; 8. Crystallizer coil; 9. Filter; 10. Condensate collection tank; 11. Reboiler; 12. Gas inlet pipe; 13. Reactor temperature control jacket; 14. Heat transfer liquid inlet pipe; 15. Connecting pipe; 16. Distillation tower outlet pipe; 17. Flushing pipe. DETAILED DESCRIPTION

[0019] In order to make the purpose and technical solution of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings.

[0020] Example 1

[0021] like Figure 1 As shown, a high-efficiency tertiary amine production device includes a preheating tank 1, which is connected to a crystallizer 3 via a reactor 2. The crystallizer 3 is connected to a distillation column 4 via a filter 9. A preheating tank coil 5 is installed inside the preheating tank 1, and a crystallizer coil 8 is installed inside the crystallizer 3. The crystallizer coil 8 is connected to the preheating tank coil 5 via a connecting pipe 15. A stirring device is installed inside the preheating tank 1, and the preheating tank coil 5 is located outside the stirring device. The crystallizer coil 8 is used to control the temperature of the crystallizer 3. Inside the reactor 2, a stirrer 6 driven by a stirring motor is installed. Below the stirrer 6, a gas distributor 7 is installed, which has a gas outlet. A reactor temperature control jacket 13 is installed outside the reactor 2. A gas inlet pipe 12 is connected to the gas distributor 7, which is equipped with a preheating device. A heat transfer fluid inlet pipe 14 is connected to the crystallizer coil 8. A condensate collecting tank 10 is provided on the distillation tower 4, and a reboiler 11 is provided below the distillation tower 4. An outlet pipe 16 is provided on the distillation tower 4, and the outlet pipe 16 is connected to the filter 9 through a flushing pipe 17.

[0022] The above-mentioned tertiary amine high-efficiency production device, when in operation, comprises the following steps:

[0023] (1) After the liquid raw material is heated in the preheating tank 1, it enters the reactor 2 through the pipeline, the agitator 6 and the reactor temperature control jacket 13 start working, and the gas phase is dispersed into the reactor 2 through the gas phase distributor 7; (2) After the reaction is completed, the product enters the crystallizer 3, the crystallizer coil 8 starts working, and after the crystallization treatment is completed, it enters the distillation tower 4 through the filter 9 for treatment, and the reboiler 11 starts working. After the treatment of the distillation tower 4 is completed, the liquid phase enters the next device through the distillation tower outlet pipeline 16; (3) The high-temperature liquid phase in the crystallizer coil 8 enters the preheating tank coil 5 through the connecting pipeline 15 to heat the raw material. When the efficiency of the filter 9 decreases, it is flushed through the flushing pipeline 17.

Claims

1. A tertiary amine efficient production device, characterized in that, The invention comprises a preheating tank (1), wherein the preheating tank (1) is connected to a crystallizer (3) via a reactor (2), and the crystallizer (3) is connected to a distillation tower (4) via a filter (9). A preheating tank coil (5) is provided inside the preheating tank (1), and a crystallizer coil (8) is provided inside the crystallizer (3). The crystallizer coil (8) is connected to the preheating tank coil (5) via a connecting pipe (15).

2. The efficient tertiary amine production device according to claim 1, characterized in that: The reactor (2) is provided with a stirrer (6) driven by a stirring motor. A gas phase distributor (7) is provided below the stirrer (6). The gas phase distributor (7) is provided with a gas outlet.

3. The efficient tertiary amine production device according to claim 2, characterized in that: A reactor temperature control jacket (13) is provided on the outside of the reactor (2), a gas phase inlet pipe (12) is connected to the gas phase distributor (7), and a pre-heating device is provided on the gas phase inlet pipe (12).

4. The efficient tertiary amine production device according to claim 1, characterized in that: The crystallizer coil (8) is connected to a heat transfer fluid inlet pipe (14).

5. The efficient production device for tertiary amines according to claim 1, characterized in that: A condensate collecting tank (10) is provided on the distillation tower (4), and a reboiler (11) is provided below the distillation tower (4).

6. The efficient production device for tertiary amines according to claim 1, characterized in that: The distillation tower (4) is provided with a distillation tower outlet pipeline (16), and the distillation tower outlet pipeline (16) is connected to the filter (9) through a flushing pipeline (17).

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