High-temperature vertical vacuum reactor for producing polysuccinimide

Abstract

The utility model discloses a high-temperature vertical vacuum reactor for producing polysuccinimide, which belongs to the technical field of chemical reaction kettles and comprises a reaction kettle body. The reaction kettle is characterized in that the other end of the connecting sleeve is rotatably connected with the reaction kettle body through a rotary joint, heat-conducting oil flow channels are arranged in the stirring rod and the stirring paddle, and the heat-conducting oil flow channel in the stirring rod is communicated with one end of the heat-conducting oil flow channel in the stirring paddle; the reaction kettle disclosed by the utility model has the beneficial effects that a mode of feeding heat-conducting oil from the lower part is adopted, so that internal and external heating modes are realized for heating, the viscous heating requirement of a material for producing polysuccinimide is ensured, and the reaction temperature can be increased to 260 DEG C or above; the discharging port is of a receding structure, axial symmetry supporting of the rotary connector is guaranteed, and bidirectional heat conduction inlet and outlet and stable rotation of the stirring rod are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of chemical reaction kettle, more particularly to a kind of high-temperature vertical vacuum reactor for producing poly succinimide. BACKGROUND

[0002] Poly succinimide is the intermediate of poly aspartic acid. Poly succinimide can be prepared into poly aspartic acid and its salt by hydrolysis. The synthesis of poly succinimide is the key step to determine poly aspartic acid. Different synthesis methods not only affect the structure and degree of polymerization of poly succinimide, but also directly determine the properties and uses of poly aspartic acid.

[0003] Poly succinimide can be synthesized by thermal polycondensation of aspartic acid, maleic anhydride and its derivatives.

[0004] The solid-phase thermal polycondensation of L-aspartic acid as raw material is obtained by the polymerization of L-aspartic acid solid at high temperature. The vertical vacuum reactor is the most common reaction equipment in chemical industry. Since the viscosity of aspartic acid, maleic anhydride and its derivatives is large during thermal polycondensation, simple heating of the outer side of the tank body cannot meet the needs of the process.

[0005] The existing vertical vacuum reactor also has an internal heating type. Its principle is that the stirring rod and stirring paddle are provided with a heat conducting oil flow channel inside, and the heat conducting oil is used to add material in the tank body. Since the inlet of the heat conducting oil is located above the transmission shaft, the overheated heat conducting oil flowing through the shaft sleeve will damage the transmission motor, and the temperature of the heat conducting oil is generally not higher than 180℃. The reaction temperature of poly succinimide is above 260℃, which causes damage to the transmission motor due to overheating of the transmission shaft. Utility model content

[0006] To solve the above problems and overcome the shortcomings of the prior art, the utility model provides a high-temperature vertical vacuum reactor for producing poly succinimide.

[0007] The first technical problem to be solved is that the existing vertical vacuum reactor is provided with a heat conducting oil flow channel inside the stirring rod and stirring paddle, and the heat conducting oil is used to add material in the tank body. Since the inlet of the heat conducting oil is located above the transmission shaft, the overheated heat conducting oil flowing through the shaft sleeve will damage the transmission motor, and the temperature of the heat conducting oil is generally not higher than 180℃. The reaction temperature of poly succinimide is above 260℃, which causes damage to the transmission motor due to overheating of the transmission shaft.

[0008] The utility model discloses a specific technical scheme that solves the above technical problem: the high temperature vertical vacuum reactor for producing poly succinimide, including the reaction kettle body, the top of reaction kettle body is provided with feed inlet and stirring mechanism, and the stirring mechanism includes stirring motor, stirring rod and stirring paddle, and the stirring paddle is fixed on the side wall of stirring rod, the bottom of reaction kettle body is provided with discharge port, and the outside of reaction kettle body is provided with heating jacket,

[0009] Its characterized in that: the output shaft of stirring motor is fixedly connected with the top end of stirring rod, and the other end of stirring rod is communicated with connecting sleeve pipe, and the other end of connecting sleeve pipe is rotatably connected with reaction kettle body through rotary joint, and the stirring rod and stirring paddle are provided with heat conducting oil flow channel, and the heat conducting oil flow channel in stirring rod is communicated with one end of heat conducting oil flow channel in stirring paddle.

[0010] The other end of heat conducting oil flow channel in stirring rod is communicated with the first chamber of connecting sleeve pipe.

[0011] The other end of heat conducting oil flow channel in stirring paddle is communicated with the second chamber of connecting sleeve pipe.

[0012] The first chamber and the second chamber of connecting sleeve pipe are fixedly communicated with rotary joint respectively.

[0013] Further, the discharge port is arranged on one side of the bottom of the reaction kettle body.

[0014] Further, the bottom of the heating jacket is provided with a first heat conducting oil inlet, and the upper portion of the heating jacket is provided with a first heat conducting oil outlet.

[0015] Further, the rotary joint is a double-pass rotary joint.

[0016] Further, the top of the reaction kettle body is further provided with a high-temperature steam outlet.

[0017] The utility model discloses the beneficial effect is:

[0018] One advantage of the utility model lies in that the internal and external heating modes are adopted to heat, guarantee the material viscous heating needs of producing poly succinimide, can increase the reaction temperature to 260 DEG C or above.

[0019] One advantage of the utility model lies in that the heat conducting oil feeding mode is adopted, the discharge port adopts the yielding structure, especially the connecting sleeve pipe cooperates with the rotary joint and the stirring rod and stirring paddle provided with the heat conducting oil flow channel, guarantees the axial symmetry support of rotary joint, guarantees the stable rotation of bidirectional heat conduction and stirring rod. DRAWINGS:

[0020] ATTACH Figure 1 It is the structure schematic diagram of the utility model;

[0021] Figure 1 is a schematic diagram of the internal structure of the rotary joint of the utility model; in the figure: Figure 2 Figure 2 is a schematic diagram of the internal structure of the rotary joint of the utility model; in the figure:

[0022] 1. stirring motor; 2. high-temperature steam outlet; 3. reaction kettle body; 4. heat-conducting oil first outlet; 5. stirring paddle; 6. heating jacket; 7. stirring rod; 8. second chamber; 9. first chamber; 10. discharge port; 11. connecting sleeve; 12. heat-conducting oil first inlet; 13. rotary joint. DETAILED DESCRIPTION

[0023] In the description of the utility model, it is understood that the terms "center", "upper", "lower", "left", "right", "rear", "lower left", "upper right", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0024] The specific embodiment of the utility model: the high-temperature vertical vacuum reactor for producing poly succinimide, including reaction kettle body 3;The top of reaction kettle body 3 is provided with feed inlet and stirring mechanism, and the stirring mechanism includes stirring motor 1, stirring rod 7 and stirring paddle 5, the stirring paddle 5 is fixed on the side wall of stirring rod 7, the bottom of reaction kettle body 3 is provided with discharge port 10, the outside of reaction kettle body 3 is provided with heating jacket 6, and the utility model is characterized in that: the output shaft of stirring motor 1 is fixedly connected with the top end of stirring rod 7, the other end of stirring rod 7 is communicated with connecting sleeve 11, the other end of connecting sleeve 11 is connected with reaction kettle body 3 in rotation through rotary joint 13,

[0025] The heat-conducting oil flow channel is arranged in the stirring rod 7 and the stirring paddle 5, one end of the heat-conducting oil flow channel in the stirring rod 7 is communicated with the heat-conducting oil flow channel in the stirring paddle 5;The other end of the heat-conducting oil flow channel in the stirring rod 7 is communicated with the first chamber 9 of the connecting sleeve 11;The other end of the heat-conducting oil flow channel in the stirring paddle 5 is communicated with the second chamber 8 of the connecting sleeve 11;

[0026] The first chamber 9 and the second chamber 8 of the connecting sleeve 11 are fixedly communicated with the rotary joint 13 respectively.

[0027] Further, the discharge port 10 is arranged on one side of the bottom of the reaction kettle body 3.

[0028] Further, the bottom of the heating jacket 6 is provided with the heat-conducting oil first inlet 12, and the upper portion of the heating jacket 6 is provided with the heat-conducting oil first outlet 4.

[0029] Further, the rotary joint 13 is a double-pass rotary joint.

[0030] Further, the top of the reaction kettle body 3 is further provided with a high-temperature steam outlet 2.

[0031] It should be noted that the utility model is a kind of high-temperature vertical vacuum reactor for producing poly succinimide, when working specifically,

[0032] 1. When producing poly succinimide, the reaction temperature needs to be raised to above 260 DEG C,

[0033] The utility model adopts two kinds of heating modes of inside and outside to heat, wherein, outside heating adopts conventional heating mode, can be jacket or coil, as long as the heating mode and heating structure that can heat outside reaction kettle body 3 all belong to the protection scope of the utility model;

[0034] 2, the improvement point of the utility model for inside heating lies in, the way of lower heat conducting oil import is adopted, so that the way of heat conducting oil import through transmission shaft can be avoided, and the damage of high temperature to transmission motor, the difficulty lies in how to ensure the stable rotation of bidirectional heat conduction import and stirring rod 7;

[0035] Wherein, the output shaft of stirring motor 1 is fixedly connected with the top end of stirring rod 7, the other end of stirring rod 7 is communicated with connecting sleeve pipe 11, the other end of connecting sleeve pipe 11 is rotatably connected with reaction kettle body 3 through rotary joint 13,

[0036] In this way, heat conducting oil enters the inlet of rotary joint 13 through the first heat conducting oil inlet 12, and then enters the first chamber 9 of connecting sleeve pipe 11 through the inlet flow channel of rotary joint 13, and the first chamber 9 of connecting sleeve pipe 11 is communicated with the heat conducting oil flow channel in stirring rod 7; the heat conducting oil flows into the heat conducting oil flow channel in stirring paddle 5 along stirring rod 7, and then returns to the second chamber 8 of connecting sleeve pipe 11 through the other end of the heat conducting oil flow channel in stirring paddle 5, and finally returns to the outlet flow channel of rotary joint and is discharged through the first heat conducting oil outlet 4,

[0037] In this way, the material can be further heated by the heat conducting oil in stirring rod 7 and stirring paddle 5, especially when the temperature is above 260 DEG C, the heat conducting oil does not pass through the transmission shaft, so the transmission shaft will not be overheated to damage the transmission motor;

[0038] 3. Since the heat conducting oil is imported from the lower part, the discharge port 10 of the utility model adopts a yielding structure, i.e. the discharge port 10 is arranged on one side of the bottom of reaction kettle body 3, which ensures the axial symmetry support of rotary joint 13 and the stable rotation of bidirectional heat conduction import and stirring rod 7;

[0039] In addition, the other end of the connecting sleeve 11 is connected with the reaction kettle body 3 through a rotary joint 13, the rotary sealing connection mode of the connecting sleeve 11 and the rotary joint 13 adopts the connection mode installed in the technical manual of the purchasing enterprise, which will not be described here, in order to facilitate understanding, and the installation instruction drawing of the purchased rotary joint 13 - double-pass rotary joint is attached.

[0040] The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A high-temperature vertical vacuum reactor for producing polysuccinimide, comprising a reactor body (3); a feed inlet and a stirring mechanism are arranged at the top of the reactor body (3), the stirring mechanism comprising a stirring motor (1), a stirring rod (7) and stirring paddles (5), the stirring paddles (5) being fixed on the side wall of the stirring rod (7), a discharge port (10) is arranged at the bottom of the reactor body (3), and a heating jacket (6) is arranged outside the reactor body (3), characterized in that: The output shaft of the stirring motor (1) is fixedly connected with the top end of the stirring rod (7), the other end of the stirring rod (7) is communicated with the connecting sleeve (11), the other end of the connecting sleeve (11) is rotatably connected with the reaction kettle body (3) through the rotary joint (13), The stirring rod (7) and the stirring paddle (5) are provided with heat-conducting oil flow channels, one end of the heat-conducting oil flow channel in the stirring rod (7) is communicated with the heat-conducting oil flow channel in the stirring paddle (5); the other end of the heat-conducting oil flow channel in the stirring rod (7) is communicated with the first chamber (9) of the connecting sleeve (11); the other end of the heat-conducting oil flow channel in the stirring paddle (5) is communicated with the second chamber (8) of the connecting sleeve (11); The first chamber (9) and the second chamber (8) of the connecting sleeve (11) are fixedly communicated with the rotary joint (13) respectively.

2. The high-temperature vertical vacuum reactor for producing a polysuccinimide according to claim 1, characterized in that The discharge port (10) is arranged on one side of the bottom of the reaction kettle body (3).

3. The high-temperature vertical vacuum reactor for producing a polysuccinimide according to claim 1, characterized in that The bottom of the heating jacket (6) is provided with a first heat-conducting oil inlet (12), and the upper part of the heating jacket (6) is provided with a first heat-conducting oil outlet (4).

4. The high-temperature vertical vacuum reactor for producing a polysuccinimide according to claim 1, characterized in that The rotary joint (13) is a double-way rotary joint.

5. The high-temperature vertical vacuum reactor for producing a polysuccinimide according to claim 1, characterized in that The top of the reaction kettle body (3) is further provided with a high-temperature steam outlet (2).

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