Fixed bed continuous tertiary amine production device

Abstract

The utility model discloses a fixed bed continuous tertiary amine production device which comprises a tank body, a bottom box is welded at the bottom end of the tank body, a heat recovery mechanism is arranged on the tank body, the heat recovery mechanism comprises a hot air pipe welded at the top end of the tank body, a T-shaped pipe is welded on the hot air pipe, and the T-shaped pipe is connected with the bottom box. One end of the T-shaped pipe is fixedly connected with a filter pipe, the end, away from the T-shaped pipe, of the filter pipe is connected with an air pump through a connecting pipe, an air inlet pipe is welded to the output end of the air pump, an annular pipe is arranged in the bottom box, one end of the annular pipe extends out of the bottom box and is fixedly connected with the air inlet pipe, and the other end of the annular pipe is fixedly connected with the air inlet pipe. Hot air in the tank body flows into the annular pipe through the air pump, and the annular pipe is wound in the cavity, so that the flowing time of the hot air in the annular pipe is prolonged, the hot air is further combined with water in the cavity, the water in the cavity is in a heating state, the heat utilization efficiency is further improved, and heat waste is reduced.

Description

Technical Field

[0001] The utility model relates to fixed-bed continuous tertiary amine production, in particular to a fixed-bed continuous tertiary amine production device. Background Art

[0002] Tertiary amines refer to amine molecules with three hydrocarbon groups connected to nitrogen, and the nitrogen is a trivalent group. According to the different structures of tertiary amines, they can be divided into single-long-chain alkyl dimethyl tertiary amines, double-long-chain alkyl dimethyl tertiary amines and tri-long-chain alkyl dimethyl tertiary amines. Long-chain tertiary amines are widely used and are very important in the petrochemical, agricultural chemicals, pharmaceutical and surfactant industries. Currently, single-long-chain alkyl dimethyl tertiary amines account for the vast majority of the total output of tertiary amines.

[0003] The alcohol one-step method is the most important method for producing tertiary amines. The core reaction is the dehydrogenation or dehydration of fatty alcohols and methylamines under the action of catalysts to generate tertiary amines. In order to reduce the occurrence of side reactions, the reaction is carried out in a hydrogen environment. Since the scale of tertiary amine devices in the past was relatively small, almost all of them in the world adopted intermittent reactions. At present, there are two main types of reactors used in the world, one is a slurry reactor with coil or jacket heat exchanger stirring, and the other is a loop reactor with external circulation heating. The earliest domestic tertiary amine production originated from the introduction of foreign technology, and most of them use slurry reactors.

[0004] At present, the existing slurry reactor is suitable for intermittent operation, with flexible product switching and the ability to flexibly adjust product categories according to market demand. However, due to the intermittent operation of the existing slurry reactor, the heat in the production process cannot be recovered and reused, which in turn causes high production costs. Utility Model Content

[0005] In view of the problems in the related technology, the utility model proposes a fixed-bed continuous tertiary amine production device to overcome the above technical problems existing in the existing related technology.

[0006] To this end, the specific technical solutions adopted by the utility model are as follows:

[0007] A fixed-bed continuous tertiary amine production device comprises a tank body, a bottom box is welded to the bottom end of the tank body, a stirring mechanism is arranged on the bottom box, a heat recovery mechanism is arranged on the tank body, the heat recovery mechanism comprises a hot air pipe welded to the top end of the tank body, a T-tube is welded to the hot air pipe, one end of the T-tube is fixedly connected to a filter tube, one end of the filter tube away from the T-tube is connected to an air pump through a connecting pipe, an air inlet pipe is welded to the output end of the air pump, a cavity is opened inside the bottom box, an annular tube is arranged on the inner surface of the cavity, one end of the annular tube extends to the outside of the bottom box and is fixedly connected to the air inlet pipe, the other end of the annular tube extends to the outside of the bottom box and is fixedly connected to the air outlet pipe, one end of the air outlet pipe away from the annular tube is fixedly connected to the heating pipe, one end of the heating pipe away from the air outlet pipe is fixedly connected to the T-tube through a connecting pipe, and a one-way valve is fixedly arranged on the connecting pipe.

[0008] Furthermore, in order to speed up the efficiency of heat exchange, the stirring mechanism includes a stirring motor fixedly connected to the bottom center of the bottom box, the output end of the stirring motor is connected to the stirring shaft by bolts, one end of the stirring shaft extends into the cavity, and stirring blades are provided at equal distances on the outer surface of the stirring shaft.

[0009] Furthermore, in order to filter impurities in the hot air, a filter cavity is provided inside the filter tube, a filter plate is welded on one end of the filter cavity, and an absorption plate is fixedly connected to one end of the filter cavity away from the filter plate.

[0010] Furthermore, in order to circulate the hot air, a heating chamber is provided inside the heating tube, and an electric heating wire is fixed inside the heating chamber.

[0011] Furthermore, in order to facilitate personnel control, a controller is provided on one side of the outer surface of the tank body, and the controller is electrically connected to the air pump, the electric heating wire and the stirring motor.

[0012] Furthermore, in order to facilitate checking the depth of water in the cavity, a scale line is fixedly provided on one side of the outer surface of the bottom box.

[0013] Furthermore, in order to inject water into the bottom box, a water inlet pipe is welded on the top of the other side of the outer surface of the bottom box, and a water outlet pipe is fixedly connected to the end of the outer surface of the bottom box away from the water inlet pipe.

[0014] Furthermore, in order to stabilize the bottom box on the ground, support legs are welded around the bottom of the bottom box.

[0015] The beneficial effects of the utility model are:

[0016] 1. The hot air in the tank flows into the T-tube through the hot air pipe, and then flows into the annular tube under the action of the air pump. Since the annular tube is wrapped in the cavity, the flow time of the hot air in the annular tube is increased, and the hot air is further combined with the water in the cavity, so that the water in the cavity is in a heated state, further improving the efficiency of heat utilization, thereby reducing heat waste.

[0017] 2. The stirring motor is controlled by a controller, so that the stirring motor causes the stirring shaft to rotate in the cavity, and then the stirring blades rotate synchronously with the stirring shaft. The rotation of the stirring blades makes the water in the cavity fully contact with the heat on the surface of the annular tube, further improving the efficiency of heat exchange. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a fixed bed continuous tertiary amine production device according to an embodiment of the utility model;

[0020] Figure 2 It is a rear structural schematic diagram of a fixed bed continuous tertiary amine production device according to an embodiment of the utility model;

[0021] Figure 3 It is a cross-sectional view of a fixed bed continuous tertiary amine production device according to an embodiment of the utility model;

[0022] Figure 4 It is a cross-sectional view of a filter tube in a fixed bed continuous tertiary amine production device according to an embodiment of the utility model;

[0023] Figure 5 It is a cross-sectional view of a heating tube in a fixed-bed continuous tertiary amine production device according to an embodiment of the utility model.

[0024] In the figure:

[0025] 1. Tank body; 2. Hot air pipe; 3. T-tube; 4. Filter tube; 5. Filter cavity; 6. Filter plate; 7. Absorption plate; 8. Connecting pipe; 9. Air pump; 10. Inlet pipe; 11. Controller; 12. Bottom box; 13. Support legs; 14. Cavity; 15. Annular tube; 16. Outlet pipe; 17. Heating tube; 18. Heating cavity; 19. Electric heating wire; 20. Connecting pipe; 21. One-way valve; 22. Scale line; 23. Water inlet pipe; 24. Water outlet pipe; 25. Stirring motor; 26. Stirring shaft; 27. Stirring blade. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-Figure 5The utility model provides a technical solution: a fixed bed continuous tertiary amine production device, comprising a tank body 1 for producing tertiary amines, a controller 11 is provided on one side of the outer surface of the tank body 1 for the convenience of personnel control, the controller 11 is electrically connected to the power supply, a bottom box 12 is welded on the bottom end of the tank body 1, a cavity 14 is opened inside the bottom box 12, an annular tube 15 is fixedly provided on the inner surface of the cavity 14, the annular tube 15 is wound around the inner surface of the cavity 14, a heat recovery mechanism is provided on the tank body 1, the heat recovery mechanism comprises a hot air pipe 2 welded on the top of the tank body 1, the hot air pipe 2 A T-tube 3 is welded on the top, one end of the T-tube 3 is fixedly connected to the filter tube 4. In order to filter impurities in the hot air, a filter chamber 5 is opened inside the filter tube 4, and the filter chamber 5 is fixed to the tank body 1 through a support. A filter plate 6 is welded on one end of the filter chamber 5, and an absorption plate 7 is fixedly connected to the end of the filter chamber 5 away from the filter plate 6. The end of the filter tube 4 away from the T-tube 3 is connected to the air pump 9 through a connecting pipe 8. The air pump 9 is electrically connected to the controller 11, and the required power is provided by the power supply. The bottom end of the air pump 9 is fixed to the tank body 1 through a support seat, and the output end of the air pump 9 An air inlet pipe 10 is welded on the bottom box 12, one end of the annular pipe 15 extends to the outside of the bottom box 12 and is fixedly connected to the air inlet pipe 10, the other end of the annular pipe 15 extends to the outside of the bottom box 12 and is fixedly connected to the air outlet pipe 16, and the end of the air outlet pipe 16 away from the annular pipe 15 is fixedly connected to the heating pipe 17. In order to circulate the hot air, a heating chamber 18 is opened inside the heating pipe 17, and an electric heating wire 19 is fixedly arranged inside the heating chamber 18. The electric heating wire 19 is electrically connected to the controller 11 and is provided with the required electric energy by the power supply. The end of the heating pipe 17 away from the air outlet pipe 16 is connected to the heating chamber 18 by a heating chamber 18. The connecting pipe 20 is fixedly connected to the T-tube 3. A one-way valve 21 is fixedly provided on the connecting pipe 20. Due to the setting of the one-way valve 21, the hot air in the T-tube 3 can only flow to one end. The hot air in the tank body 1 flows into the T-tube 3 through the hot air pipe 2, and then flows into the annular tube 15 under the action of the air pump 9. Since the annular tube 15 is wound in the cavity 14, the flow time of the hot air in the annular tube 15 is increased, and the hot air is further combined with the water in the cavity 14, so that the water in the cavity 14 is in a heated state, which further improves the efficiency of heat utilization and reduces heat waste.

[0028] See also Figure 1-Figure 3In order to speed up the efficiency of heat exchange, a stirring mechanism is provided on the bottom box 12, and the stirring mechanism includes a stirring motor 25 fixedly connected to the bottom center of the bottom box 12. The stirring motor 25 is electrically connected to the controller 11 and is electrically connected by a power supply. The output end of the stirring motor 25 is connected to a stirring shaft 26 through a bolt. One end of the stirring shaft 26 extends into the cavity 14. A bearing is provided between the stirring shaft 26 and the bottom box 12. Stirring blades 27 are provided at equal distances on the outer surface of the stirring shaft 26. The rotation of the stirring blades 27 will not cause damage to the annular tube 15. In order to facilitate the viewing of the depth of water in the cavity 14, a scale line 22 is fixedly provided on one side of the outer surface of the bottom box 12. In order to provide a reference to the bottom box 12 Water is injected inside, and an inlet pipe 23 is welded on the top of the other side of the outer surface of the bottom box 12. A pipe cover is threadedly connected to the water inlet pipe 23. An outlet pipe 24 is fixedly connected to the end of the outer surface of the bottom box 12 away from the water inlet pipe 23. A valve is fixedly provided on the outlet pipe 24. In order to make the bottom box 12 stable on the ground, support legs 13 are welded on all sides of the bottom of the bottom box 12. The stirring motor 25 is controlled by the controller 11 to work. The stirring motor 25 causes the stirring shaft 26 to rotate in the cavity 14, and then the stirring blades 27 rotate synchronously with the stirring shaft 26. The rotation of the stirring blades 27 makes the water in the cavity 14 fully contact with the heat on the surface of the annular tube 15, further improving the efficiency of heat exchange.

[0029] In summary, with the aid of the above technical solution of the utility model, in actual use, first, close the valve on the water outlet pipe 24, and inject water into the cavity 14 through the water inlet pipe 23, and determine the amount of water injected according to the scale line 22. Secondly, during the production process of tertiary amine, the hot air in the tank body 1 flows into the T-tube 3 through the hot air pipe 2. The setting of the one-way valve 21 allows the hot air to flow into the filter tube 4. The setting of the filter plate 6 and the absorption plate 7 can filter and absorb impurities in the hot air. The filtered hot air flows into the annular tube 15 under the action of the air pump 9. Since the annular tube 15 is wound in the cavity 14, the hot air in the annular tube 15 is increased. The flow time in the annular tube 15 is shortened, and at the same time, the controller 11 controls the stirring motor 25 to work. The stirring motor 25 causes the stirring shaft 26 to rotate in the cavity 14, and then the stirring blades 27 rotate synchronously with the stirring shaft 26. The rotation of the stirring blades 27 makes the water in the cavity 14 fully contact with the heat on the surface of the annular tube 15. The heated water is collected through the water outlet pipe 24, thereby reducing the waste of heat. The gas after heat exchange flows into the heating tube 17 and is heated again under the action of the electric heating wire 19. The heated gas flows into the T-tube 3, thereby forming a heat cycle, further improving the efficiency of heat utilization.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fixed bed continuous tertiary amine production device, comprising a tank (1), characterized in that: A bottom box (12) is welded to the bottom end of the tank body (1), a stirring mechanism is provided on the bottom box (12), a heat recovery mechanism is provided on the tank body (1), the heat recovery mechanism comprises a hot air pipe (2) welded to the top end of the tank body (1), a T-shaped pipe (3) is welded to the hot air pipe (2), one end of the T-shaped pipe (3) is fixedly connected to the filter pipe (4), the end of the filter pipe (4) away from the T-shaped pipe (3) is connected to the air pump (9) through a connecting pipe (8), an air intake pipe (10) is welded to the output end of the air pump (9), and a cavity (14) is opened inside the bottom box (12). An annular tube (15) is provided on the inner surface of the cavity (14), one end of the annular tube (15) extends to the outside of the bottom box (12) and is fixedly connected to the air inlet pipe (10), the other end of the annular tube (15) extends to the outside of the bottom box (12) and is fixedly connected to the air outlet pipe (16), the end of the air outlet pipe (16) away from the annular tube (15) is fixedly connected to the heating pipe (17), the end of the heating pipe (17) away from the air outlet pipe (16) is fixedly connected to the T-shaped tube (3) through a connecting tube (20), and a one-way valve (21) is fixedly provided on the connecting tube (20).

2. A fixed bed continuous tertiary amine production device according to claim 1, characterized in that: The stirring mechanism comprises a stirring motor (25) fixedly connected to the bottom center of the bottom box (12), the output end of the stirring motor (25) being connected to a stirring shaft (26) via a bolt, one end of the stirring shaft (26) extending into the cavity (14), and stirring blades (27) being arranged at equal distances on the outer surface of the stirring shaft (26).

3. A fixed bed continuous tertiary amine production device according to claim 1, characterized in that: A filter chamber (5) is provided inside the filter tube (4), a filter plate (6) is welded to one end of the filter chamber (5), and an absorption plate (7) is fixedly connected to one end of the filter chamber (5) away from the filter plate (6).

4. A fixed bed continuous tertiary amine production device according to claim 2, characterized in that: A heating chamber (18) is provided inside the heating tube (17), and an electric heating wire (19) is fixedly provided inside the heating chamber (18).

5. A fixed bed continuous tertiary amine production device according to claim 4, characterized in that: A controller (11) is provided on one side of the outer surface of the tank body (1), and the controller (11) is electrically connected to the air pump (9), the electric heating wire (19) and the stirring motor (25).

6. A fixed bed continuous tertiary amine production device according to claim 2, characterized in that: A scale mark (22) is fixedly provided on one side of the outer surface of the bottom box (12).

7. A fixed bed continuous tertiary amine production device according to claim 6, characterized in that: A water inlet pipe (23) is welded to the top end of the other side of the outer surface of the bottom box (12), and a water outlet pipe (24) is fixedly connected to the end of the outer surface of the bottom box (12) away from the water inlet pipe (23).

8. A fixed bed continuous tertiary amine production device according to claim 7, characterized in that: Support legs (13) are welded around the bottom of the bottom box (12).

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